| /* |
| * HTTP protocol analyzer |
| * |
| * Copyright 2000-2010 Willy Tarreau <w@1wt.eu> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| */ |
| |
| #include <ctype.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <syslog.h> |
| #include <time.h> |
| |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| |
| #include <common/appsession.h> |
| #include <common/base64.h> |
| #include <common/compat.h> |
| #include <common/config.h> |
| #include <common/debug.h> |
| #include <common/memory.h> |
| #include <common/mini-clist.h> |
| #include <common/standard.h> |
| #include <common/ticks.h> |
| #include <common/time.h> |
| #include <common/uri_auth.h> |
| #include <common/version.h> |
| |
| #include <types/capture.h> |
| #include <types/global.h> |
| |
| #include <proto/acl.h> |
| #include <proto/auth.h> |
| #include <proto/backend.h> |
| #include <proto/buffers.h> |
| #include <proto/checks.h> |
| #include <proto/dumpstats.h> |
| #include <proto/fd.h> |
| #include <proto/frontend.h> |
| #include <proto/log.h> |
| #include <proto/hdr_idx.h> |
| #include <proto/pattern.h> |
| #include <proto/proto_tcp.h> |
| #include <proto/proto_http.h> |
| #include <proto/proxy.h> |
| #include <proto/queue.h> |
| #include <proto/server.h> |
| #include <proto/session.h> |
| #include <proto/stream_interface.h> |
| #include <proto/stream_sock.h> |
| #include <proto/task.h> |
| |
| const char HTTP_100[] = |
| "HTTP/1.1 100 Continue\r\n\r\n"; |
| |
| const struct chunk http_100_chunk = { |
| .str = (char *)&HTTP_100, |
| .len = sizeof(HTTP_100)-1 |
| }; |
| |
| /* This is used by remote monitoring */ |
| const char HTTP_200[] = |
| "HTTP/1.0 200 OK\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html\r\n" |
| "\r\n" |
| "<html><body><h1>200 OK</h1>\nHAProxy: service ready.\n</body></html>\n"; |
| |
| const struct chunk http_200_chunk = { |
| .str = (char *)&HTTP_200, |
| .len = sizeof(HTTP_200)-1 |
| }; |
| |
| /* Warning: no "connection" header is provided with the 3xx messages below */ |
| const char *HTTP_301 = |
| "HTTP/1.1 301 Moved Permanently\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Content-length: 0\r\n" |
| "Location: "; /* not terminated since it will be concatenated with the URL */ |
| |
| const char *HTTP_302 = |
| "HTTP/1.1 302 Found\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Content-length: 0\r\n" |
| "Location: "; /* not terminated since it will be concatenated with the URL */ |
| |
| /* same as 302 except that the browser MUST retry with the GET method */ |
| const char *HTTP_303 = |
| "HTTP/1.1 303 See Other\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Content-length: 0\r\n" |
| "Location: "; /* not terminated since it will be concatenated with the URL */ |
| |
| /* Warning: this one is an sprintf() fmt string, with <realm> as its only argument */ |
| const char *HTTP_401_fmt = |
| "HTTP/1.0 401 Unauthorized\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html\r\n" |
| "WWW-Authenticate: Basic realm=\"%s\"\r\n" |
| "\r\n" |
| "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n"; |
| |
| const char *HTTP_407_fmt = |
| "HTTP/1.0 407 Unauthorized\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html\r\n" |
| "Proxy-Authenticate: Basic realm=\"%s\"\r\n" |
| "\r\n" |
| "<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n"; |
| |
| |
| const int http_err_codes[HTTP_ERR_SIZE] = { |
| [HTTP_ERR_400] = 400, |
| [HTTP_ERR_403] = 403, |
| [HTTP_ERR_408] = 408, |
| [HTTP_ERR_500] = 500, |
| [HTTP_ERR_502] = 502, |
| [HTTP_ERR_503] = 503, |
| [HTTP_ERR_504] = 504, |
| }; |
| |
| static const char *http_err_msgs[HTTP_ERR_SIZE] = { |
| [HTTP_ERR_400] = |
| "HTTP/1.0 400 Bad request\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html\r\n" |
| "\r\n" |
| "<html><body><h1>400 Bad request</h1>\nYour browser sent an invalid request.\n</body></html>\n", |
| |
| [HTTP_ERR_403] = |
| "HTTP/1.0 403 Forbidden\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html\r\n" |
| "\r\n" |
| "<html><body><h1>403 Forbidden</h1>\nRequest forbidden by administrative rules.\n</body></html>\n", |
| |
| [HTTP_ERR_408] = |
| "HTTP/1.0 408 Request Time-out\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html\r\n" |
| "\r\n" |
| "<html><body><h1>408 Request Time-out</h1>\nYour browser didn't send a complete request in time.\n</body></html>\n", |
| |
| [HTTP_ERR_500] = |
| "HTTP/1.0 500 Server Error\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html\r\n" |
| "\r\n" |
| "<html><body><h1>500 Server Error</h1>\nAn internal server error occured.\n</body></html>\n", |
| |
| [HTTP_ERR_502] = |
| "HTTP/1.0 502 Bad Gateway\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html\r\n" |
| "\r\n" |
| "<html><body><h1>502 Bad Gateway</h1>\nThe server returned an invalid or incomplete response.\n</body></html>\n", |
| |
| [HTTP_ERR_503] = |
| "HTTP/1.0 503 Service Unavailable\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html\r\n" |
| "\r\n" |
| "<html><body><h1>503 Service Unavailable</h1>\nNo server is available to handle this request.\n</body></html>\n", |
| |
| [HTTP_ERR_504] = |
| "HTTP/1.0 504 Gateway Time-out\r\n" |
| "Cache-Control: no-cache\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html\r\n" |
| "\r\n" |
| "<html><body><h1>504 Gateway Time-out</h1>\nThe server didn't respond in time.\n</body></html>\n", |
| |
| }; |
| |
| /* We must put the messages here since GCC cannot initialize consts depending |
| * on strlen(). |
| */ |
| struct chunk http_err_chunks[HTTP_ERR_SIZE]; |
| |
| #define FD_SETS_ARE_BITFIELDS |
| #ifdef FD_SETS_ARE_BITFIELDS |
| /* |
| * This map is used with all the FD_* macros to check whether a particular bit |
| * is set or not. Each bit represents an ACSII code. FD_SET() sets those bytes |
| * which should be encoded. When FD_ISSET() returns non-zero, it means that the |
| * byte should be encoded. Be careful to always pass bytes from 0 to 255 |
| * exclusively to the macros. |
| */ |
| fd_set hdr_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))]; |
| fd_set url_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))]; |
| |
| #else |
| #error "Check if your OS uses bitfields for fd_sets" |
| #endif |
| |
| void init_proto_http() |
| { |
| int i; |
| char *tmp; |
| int msg; |
| |
| for (msg = 0; msg < HTTP_ERR_SIZE; msg++) { |
| if (!http_err_msgs[msg]) { |
| Alert("Internal error: no message defined for HTTP return code %d. Aborting.\n", msg); |
| abort(); |
| } |
| |
| http_err_chunks[msg].str = (char *)http_err_msgs[msg]; |
| http_err_chunks[msg].len = strlen(http_err_msgs[msg]); |
| } |
| |
| /* initialize the log header encoding map : '{|}"#' should be encoded with |
| * '#' as prefix, as well as non-printable characters ( <32 or >= 127 ). |
| * URL encoding only requires '"', '#' to be encoded as well as non- |
| * printable characters above. |
| */ |
| memset(hdr_encode_map, 0, sizeof(hdr_encode_map)); |
| memset(url_encode_map, 0, sizeof(url_encode_map)); |
| for (i = 0; i < 32; i++) { |
| FD_SET(i, hdr_encode_map); |
| FD_SET(i, url_encode_map); |
| } |
| for (i = 127; i < 256; i++) { |
| FD_SET(i, hdr_encode_map); |
| FD_SET(i, url_encode_map); |
| } |
| |
| tmp = "\"#{|}"; |
| while (*tmp) { |
| FD_SET(*tmp, hdr_encode_map); |
| tmp++; |
| } |
| |
| tmp = "\"#"; |
| while (*tmp) { |
| FD_SET(*tmp, url_encode_map); |
| tmp++; |
| } |
| |
| /* memory allocations */ |
| pool2_requri = create_pool("requri", REQURI_LEN, MEM_F_SHARED); |
| pool2_capture = create_pool("capture", CAPTURE_LEN, MEM_F_SHARED); |
| } |
| |
| /* |
| * We have 26 list of methods (1 per first letter), each of which can have |
| * up to 3 entries (2 valid, 1 null). |
| */ |
| struct http_method_desc { |
| http_meth_t meth; |
| int len; |
| const char text[8]; |
| }; |
| |
| const struct http_method_desc http_methods[26][3] = { |
| ['C' - 'A'] = { |
| [0] = { .meth = HTTP_METH_CONNECT , .len=7, .text="CONNECT" }, |
| }, |
| ['D' - 'A'] = { |
| [0] = { .meth = HTTP_METH_DELETE , .len=6, .text="DELETE" }, |
| }, |
| ['G' - 'A'] = { |
| [0] = { .meth = HTTP_METH_GET , .len=3, .text="GET" }, |
| }, |
| ['H' - 'A'] = { |
| [0] = { .meth = HTTP_METH_HEAD , .len=4, .text="HEAD" }, |
| }, |
| ['P' - 'A'] = { |
| [0] = { .meth = HTTP_METH_POST , .len=4, .text="POST" }, |
| [1] = { .meth = HTTP_METH_PUT , .len=3, .text="PUT" }, |
| }, |
| ['T' - 'A'] = { |
| [0] = { .meth = HTTP_METH_TRACE , .len=5, .text="TRACE" }, |
| }, |
| /* rest is empty like this : |
| * [1] = { .meth = HTTP_METH_NONE , .len=0, .text="" }, |
| */ |
| }; |
| |
| /* It is about twice as fast on recent architectures to lookup a byte in a |
| * table than to perform a boolean AND or OR between two tests. Refer to |
| * RFC2616 for those chars. |
| */ |
| |
| const char http_is_spht[256] = { |
| [' '] = 1, ['\t'] = 1, |
| }; |
| |
| const char http_is_crlf[256] = { |
| ['\r'] = 1, ['\n'] = 1, |
| }; |
| |
| const char http_is_lws[256] = { |
| [' '] = 1, ['\t'] = 1, |
| ['\r'] = 1, ['\n'] = 1, |
| }; |
| |
| const char http_is_sep[256] = { |
| ['('] = 1, [')'] = 1, ['<'] = 1, ['>'] = 1, |
| ['@'] = 1, [','] = 1, [';'] = 1, [':'] = 1, |
| ['"'] = 1, ['/'] = 1, ['['] = 1, [']'] = 1, |
| ['{'] = 1, ['}'] = 1, ['?'] = 1, ['='] = 1, |
| [' '] = 1, ['\t'] = 1, ['\\'] = 1, |
| }; |
| |
| const char http_is_ctl[256] = { |
| [0 ... 31] = 1, |
| [127] = 1, |
| }; |
| |
| /* |
| * A token is any ASCII char that is neither a separator nor a CTL char. |
| * Do not overwrite values in assignment since gcc-2.95 will not handle |
| * them correctly. Instead, define every non-CTL char's status. |
| */ |
| const char http_is_token[256] = { |
| [' '] = 0, ['!'] = 1, ['"'] = 0, ['#'] = 1, |
| ['$'] = 1, ['%'] = 1, ['&'] = 1, ['\''] = 1, |
| ['('] = 0, [')'] = 0, ['*'] = 1, ['+'] = 1, |
| [','] = 0, ['-'] = 1, ['.'] = 1, ['/'] = 0, |
| ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1, |
| ['4'] = 1, ['5'] = 1, ['6'] = 1, ['7'] = 1, |
| ['8'] = 1, ['9'] = 1, [':'] = 0, [';'] = 0, |
| ['<'] = 0, ['='] = 0, ['>'] = 0, ['?'] = 0, |
| ['@'] = 0, ['A'] = 1, ['B'] = 1, ['C'] = 1, |
| ['D'] = 1, ['E'] = 1, ['F'] = 1, ['G'] = 1, |
| ['H'] = 1, ['I'] = 1, ['J'] = 1, ['K'] = 1, |
| ['L'] = 1, ['M'] = 1, ['N'] = 1, ['O'] = 1, |
| ['P'] = 1, ['Q'] = 1, ['R'] = 1, ['S'] = 1, |
| ['T'] = 1, ['U'] = 1, ['V'] = 1, ['W'] = 1, |
| ['X'] = 1, ['Y'] = 1, ['Z'] = 1, ['['] = 0, |
| ['\\'] = 0, [']'] = 0, ['^'] = 1, ['_'] = 1, |
| ['`'] = 1, ['a'] = 1, ['b'] = 1, ['c'] = 1, |
| ['d'] = 1, ['e'] = 1, ['f'] = 1, ['g'] = 1, |
| ['h'] = 1, ['i'] = 1, ['j'] = 1, ['k'] = 1, |
| ['l'] = 1, ['m'] = 1, ['n'] = 1, ['o'] = 1, |
| ['p'] = 1, ['q'] = 1, ['r'] = 1, ['s'] = 1, |
| ['t'] = 1, ['u'] = 1, ['v'] = 1, ['w'] = 1, |
| ['x'] = 1, ['y'] = 1, ['z'] = 1, ['{'] = 0, |
| ['|'] = 1, ['}'] = 0, ['~'] = 1, |
| }; |
| |
| |
| /* |
| * An http ver_token is any ASCII which can be found in an HTTP version, |
| * which includes 'H', 'T', 'P', '/', '.' and any digit. |
| */ |
| const char http_is_ver_token[256] = { |
| ['.'] = 1, ['/'] = 1, |
| ['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1, ['4'] = 1, |
| ['5'] = 1, ['6'] = 1, ['7'] = 1, ['8'] = 1, ['9'] = 1, |
| ['H'] = 1, ['P'] = 1, ['T'] = 1, |
| }; |
| |
| |
| /* |
| * Silent debug that outputs only in strace, using fd #-1. Trash is modified. |
| */ |
| #if defined(DEBUG_FSM) |
| static void http_silent_debug(int line, struct session *s) |
| { |
| int size = 0; |
| size += snprintf(trash + size, sizeof(trash) - size, |
| "[%04d] req: p=%d(%d) s=%d bf=%08x an=%08x data=%p size=%d l=%d w=%p r=%p lr=%p sm=%d fw=%ld tf=%08x\n", |
| line, |
| s->si[0].state, s->si[0].fd, s->txn.req.msg_state, s->req->flags, s->req->analysers, |
| s->req->data, s->req->size, s->req->l, s->req->w, s->req->r, s->req->lr, s->req->send_max, s->req->to_forward, s->txn.flags); |
| write(-1, trash, size); |
| size = 0; |
| size += snprintf(trash + size, sizeof(trash) - size, |
| " %04d rep: p=%d(%d) s=%d bf=%08x an=%08x data=%p size=%d l=%d w=%p r=%p lr=%p sm=%d fw=%ld\n", |
| line, |
| s->si[1].state, s->si[1].fd, s->txn.rsp.msg_state, s->rep->flags, s->rep->analysers, |
| s->rep->data, s->rep->size, s->rep->l, s->rep->w, s->rep->r, s->rep->lr, s->rep->send_max, s->rep->to_forward); |
| |
| write(-1, trash, size); |
| } |
| #else |
| #define http_silent_debug(l,s) do { } while (0) |
| #endif |
| |
| /* |
| * Adds a header and its CRLF at the tail of buffer <b>, just before the last |
| * CRLF. Text length is measured first, so it cannot be NULL. |
| * The header is also automatically added to the index <hdr_idx>, and the end |
| * of headers is automatically adjusted. The number of bytes added is returned |
| * on success, otherwise <0 is returned indicating an error. |
| */ |
| int http_header_add_tail(struct buffer *b, struct http_msg *msg, |
| struct hdr_idx *hdr_idx, const char *text) |
| { |
| int bytes, len; |
| |
| len = strlen(text); |
| bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len); |
| if (!bytes) |
| return -1; |
| http_msg_move_end(msg, bytes); |
| return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail); |
| } |
| |
| /* |
| * Adds a header and its CRLF at the tail of buffer <b>, just before the last |
| * CRLF. <len> bytes are copied, not counting the CRLF. If <text> is NULL, then |
| * the buffer is only opened and the space reserved, but nothing is copied. |
| * The header is also automatically added to the index <hdr_idx>, and the end |
| * of headers is automatically adjusted. The number of bytes added is returned |
| * on success, otherwise <0 is returned indicating an error. |
| */ |
| int http_header_add_tail2(struct buffer *b, struct http_msg *msg, |
| struct hdr_idx *hdr_idx, const char *text, int len) |
| { |
| int bytes; |
| |
| bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len); |
| if (!bytes) |
| return -1; |
| http_msg_move_end(msg, bytes); |
| return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail); |
| } |
| |
| /* |
| * Checks if <hdr> is exactly <name> for <len> chars, and ends with a colon. |
| * If so, returns the position of the first non-space character relative to |
| * <hdr>, or <end>-<hdr> if not found before. If no value is found, it tries |
| * to return a pointer to the place after the first space. Returns 0 if the |
| * header name does not match. Checks are case-insensitive. |
| */ |
| int http_header_match2(const char *hdr, const char *end, |
| const char *name, int len) |
| { |
| const char *val; |
| |
| if (hdr + len >= end) |
| return 0; |
| if (hdr[len] != ':') |
| return 0; |
| if (strncasecmp(hdr, name, len) != 0) |
| return 0; |
| val = hdr + len + 1; |
| while (val < end && HTTP_IS_SPHT(*val)) |
| val++; |
| if ((val >= end) && (len + 2 <= end - hdr)) |
| return len + 2; /* we may replace starting from second space */ |
| return val - hdr; |
| } |
| |
| /* Find the end of the header value contained between <s> and <e>. See RFC2616, |
| * par 2.2 for more information. Note that it requires a valid header to return |
| * a valid result. This works for headers defined as comma-separated lists. |
| */ |
| char *find_hdr_value_end(char *s, const char *e) |
| { |
| int quoted, qdpair; |
| |
| quoted = qdpair = 0; |
| for (; s < e; s++) { |
| if (qdpair) qdpair = 0; |
| else if (quoted) { |
| if (*s == '\\') qdpair = 1; |
| else if (*s == '"') quoted = 0; |
| } |
| else if (*s == '"') quoted = 1; |
| else if (*s == ',') return s; |
| } |
| return s; |
| } |
| |
| /* Find the first or next occurrence of header <name> in message buffer <sol> |
| * using headers index <idx>, and return it in the <ctx> structure. This |
| * structure holds everything necessary to use the header and find next |
| * occurrence. If its <idx> member is 0, the header is searched from the |
| * beginning. Otherwise, the next occurrence is returned. The function returns |
| * 1 when it finds a value, and 0 when there is no more. It is designed to work |
| * with headers defined as comma-separated lists. As a special case, if ctx->val |
| * is NULL when searching for a new values of a header, the current header is |
| * rescanned. This allows rescanning after a header deletion. |
| */ |
| int http_find_header2(const char *name, int len, |
| char *sol, struct hdr_idx *idx, |
| struct hdr_ctx *ctx) |
| { |
| char *eol, *sov; |
| int cur_idx, old_idx; |
| |
| cur_idx = ctx->idx; |
| if (cur_idx) { |
| /* We have previously returned a value, let's search |
| * another one on the same line. |
| */ |
| sol = ctx->line; |
| ctx->del = ctx->val + ctx->vlen; |
| sov = sol + ctx->del; |
| eol = sol + idx->v[cur_idx].len; |
| |
| if (sov >= eol) |
| /* no more values in this header */ |
| goto next_hdr; |
| |
| /* values remaining for this header, skip the comma but save it |
| * for later use (eg: for header deletion). |
| */ |
| sov++; |
| while (sov < eol && http_is_lws[(unsigned char)*sov]) |
| sov++; |
| |
| goto return_hdr; |
| } |
| |
| /* first request for this header */ |
| sol += hdr_idx_first_pos(idx); |
| old_idx = 0; |
| cur_idx = hdr_idx_first_idx(idx); |
| while (cur_idx) { |
| eol = sol + idx->v[cur_idx].len; |
| |
| if (len == 0) { |
| /* No argument was passed, we want any header. |
| * To achieve this, we simply build a fake request. */ |
| while (sol + len < eol && sol[len] != ':') |
| len++; |
| name = sol; |
| } |
| |
| if ((len < eol - sol) && |
| (sol[len] == ':') && |
| (strncasecmp(sol, name, len) == 0)) { |
| ctx->del = len; |
| sov = sol + len + 1; |
| while (sov < eol && http_is_lws[(unsigned char)*sov]) |
| sov++; |
| |
| ctx->line = sol; |
| ctx->prev = old_idx; |
| return_hdr: |
| ctx->idx = cur_idx; |
| ctx->val = sov - sol; |
| |
| eol = find_hdr_value_end(sov, eol); |
| ctx->vlen = eol - sov; |
| return 1; |
| } |
| next_hdr: |
| sol = eol + idx->v[cur_idx].cr + 1; |
| old_idx = cur_idx; |
| cur_idx = idx->v[cur_idx].next; |
| } |
| return 0; |
| } |
| |
| int http_find_header(const char *name, |
| char *sol, struct hdr_idx *idx, |
| struct hdr_ctx *ctx) |
| { |
| return http_find_header2(name, strlen(name), sol, idx, ctx); |
| } |
| |
| /* Remove one value of a header. This only works on a <ctx> returned by one of |
| * the http_find_header functions. The value is removed, as well as surrounding |
| * commas if any. If the removed value was alone, the whole header is removed. |
| * The ctx is always updated accordingly, as well as buffer <buf> and HTTP |
| * message <msg>. The new index is returned. If it is zero, it means there is |
| * no more header, so any processing may stop. The ctx is always left in a form |
| * that can be handled by http_find_header2() to find next occurrence. |
| */ |
| int http_remove_header2(struct http_msg *msg, struct buffer *buf, |
| struct hdr_idx *idx, struct hdr_ctx *ctx) |
| { |
| int cur_idx = ctx->idx; |
| char *sol = ctx->line; |
| struct hdr_idx_elem *hdr; |
| int delta, skip_comma; |
| |
| if (!cur_idx) |
| return 0; |
| |
| hdr = &idx->v[cur_idx]; |
| if (sol[ctx->del] == ':' && ctx->val + ctx->vlen == hdr->len) { |
| /* This was the only value of the header, we must now remove it entirely. */ |
| delta = buffer_replace2(buf, sol, sol + hdr->len + hdr->cr + 1, NULL, 0); |
| http_msg_move_end(msg, delta); |
| idx->used--; |
| hdr->len = 0; /* unused entry */ |
| idx->v[ctx->prev].next = idx->v[ctx->idx].next; |
| if (idx->tail == ctx->idx) |
| idx->tail = ctx->prev; |
| ctx->idx = ctx->prev; /* walk back to the end of previous header */ |
| ctx->line -= idx->v[ctx->idx].len + idx->v[cur_idx].cr + 1; |
| ctx->val = idx->v[ctx->idx].len; /* point to end of previous header */ |
| ctx->vlen = 0; |
| return ctx->idx; |
| } |
| |
| /* This was not the only value of this header. We have to remove between |
| * ctx->del+1 and ctx->val+ctx->vlen+1 included. If it is the last entry |
| * of the list, we remove the last separator. |
| */ |
| |
| skip_comma = (ctx->val + ctx->vlen == hdr->len) ? 0 : 1; |
| delta = buffer_replace2(buf, sol + ctx->del + skip_comma, |
| sol + ctx->val + ctx->vlen + skip_comma, |
| NULL, 0); |
| hdr->len += delta; |
| http_msg_move_end(msg, delta); |
| ctx->val = ctx->del; |
| ctx->vlen = 0; |
| return ctx->idx; |
| } |
| |
| /* This function handles a server error at the stream interface level. The |
| * stream interface is assumed to be already in a closed state. An optional |
| * message is copied into the input buffer, and an HTTP status code stored. |
| * The error flags are set to the values in arguments. Any pending request |
| * in this buffer will be lost. |
| */ |
| static void http_server_error(struct session *t, struct stream_interface *si, |
| int err, int finst, int status, const struct chunk *msg) |
| { |
| buffer_auto_read(si->ob); |
| buffer_abort(si->ob); |
| buffer_auto_close(si->ob); |
| buffer_erase(si->ob); |
| buffer_auto_close(si->ib); |
| buffer_auto_read(si->ib); |
| if (status > 0 && msg) { |
| t->txn.status = status; |
| buffer_write(si->ib, msg->str, msg->len); |
| } |
| if (!(t->flags & SN_ERR_MASK)) |
| t->flags |= err; |
| if (!(t->flags & SN_FINST_MASK)) |
| t->flags |= finst; |
| } |
| |
| /* This function returns the appropriate error location for the given session |
| * and message. |
| */ |
| |
| struct chunk *error_message(struct session *s, int msgnum) |
| { |
| if (s->be->errmsg[msgnum].str) |
| return &s->be->errmsg[msgnum]; |
| else if (s->fe->errmsg[msgnum].str) |
| return &s->fe->errmsg[msgnum]; |
| else |
| return &http_err_chunks[msgnum]; |
| } |
| |
| /* |
| * returns HTTP_METH_NONE if there is nothing valid to read (empty or non-text |
| * string), HTTP_METH_OTHER for unknown methods, or the identified method. |
| */ |
| static http_meth_t find_http_meth(const char *str, const int len) |
| { |
| unsigned char m; |
| const struct http_method_desc *h; |
| |
| m = ((unsigned)*str - 'A'); |
| |
| if (m < 26) { |
| for (h = http_methods[m]; h->len > 0; h++) { |
| if (unlikely(h->len != len)) |
| continue; |
| if (likely(memcmp(str, h->text, h->len) == 0)) |
| return h->meth; |
| }; |
| return HTTP_METH_OTHER; |
| } |
| return HTTP_METH_NONE; |
| |
| } |
| |
| /* Parse the URI from the given transaction (which is assumed to be in request |
| * phase) and look for the "/" beginning the PATH. If not found, return NULL. |
| * It is returned otherwise. |
| */ |
| static char * |
| http_get_path(struct http_txn *txn) |
| { |
| char *ptr, *end; |
| |
| ptr = txn->req.sol + txn->req.sl.rq.u; |
| end = ptr + txn->req.sl.rq.u_l; |
| |
| if (ptr >= end) |
| return NULL; |
| |
| /* RFC2616, par. 5.1.2 : |
| * Request-URI = "*" | absuri | abspath | authority |
| */ |
| |
| if (*ptr == '*') |
| return NULL; |
| |
| if (isalpha((unsigned char)*ptr)) { |
| /* this is a scheme as described by RFC3986, par. 3.1 */ |
| ptr++; |
| while (ptr < end && |
| (isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.')) |
| ptr++; |
| /* skip '://' */ |
| if (ptr == end || *ptr++ != ':') |
| return NULL; |
| if (ptr == end || *ptr++ != '/') |
| return NULL; |
| if (ptr == end || *ptr++ != '/') |
| return NULL; |
| } |
| /* skip [user[:passwd]@]host[:[port]] */ |
| |
| while (ptr < end && *ptr != '/') |
| ptr++; |
| |
| if (ptr == end) |
| return NULL; |
| |
| /* OK, we got the '/' ! */ |
| return ptr; |
| } |
| |
| /* Returns a 302 for a redirectable request. This may only be called just after |
| * the stream interface has moved to SI_ST_ASS. Unprocessable requests are |
| * left unchanged and will follow normal proxy processing. |
| */ |
| void perform_http_redirect(struct session *s, struct stream_interface *si) |
| { |
| struct http_txn *txn; |
| struct chunk rdr; |
| char *path; |
| int len; |
| |
| /* 1: create the response header */ |
| rdr.len = strlen(HTTP_302); |
| rdr.str = trash; |
| rdr.size = sizeof(trash); |
| memcpy(rdr.str, HTTP_302, rdr.len); |
| |
| /* 2: add the server's prefix */ |
| if (rdr.len + s->srv->rdr_len > rdr.size) |
| return; |
| |
| /* special prefix "/" means don't change URL */ |
| if (s->srv->rdr_len != 1 || *s->srv->rdr_pfx != '/') { |
| memcpy(rdr.str + rdr.len, s->srv->rdr_pfx, s->srv->rdr_len); |
| rdr.len += s->srv->rdr_len; |
| } |
| |
| /* 3: add the request URI */ |
| txn = &s->txn; |
| path = http_get_path(txn); |
| if (!path) |
| return; |
| |
| len = txn->req.sl.rq.u_l + (txn->req.sol + txn->req.sl.rq.u) - path; |
| if (rdr.len + len > rdr.size - 4) /* 4 for CRLF-CRLF */ |
| return; |
| |
| memcpy(rdr.str + rdr.len, path, len); |
| rdr.len += len; |
| |
| if (unlikely(txn->flags & TX_USE_PX_CONN)) { |
| memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29); |
| rdr.len += 29; |
| } else { |
| memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23); |
| rdr.len += 23; |
| } |
| |
| /* prepare to return without error. */ |
| si->shutr(si); |
| si->shutw(si); |
| si->err_type = SI_ET_NONE; |
| si->err_loc = NULL; |
| si->state = SI_ST_CLO; |
| |
| /* send the message */ |
| http_server_error(s, si, SN_ERR_PRXCOND, SN_FINST_C, 302, &rdr); |
| |
| /* FIXME: we should increase a counter of redirects per server and per backend. */ |
| if (s->srv) |
| srv_inc_sess_ctr(s->srv); |
| } |
| |
| /* Return the error message corresponding to si->err_type. It is assumed |
| * that the server side is closed. Note that err_type is actually a |
| * bitmask, where almost only aborts may be cumulated with other |
| * values. We consider that aborted operations are more important |
| * than timeouts or errors due to the fact that nobody else in the |
| * logs might explain incomplete retries. All others should avoid |
| * being cumulated. It should normally not be possible to have multiple |
| * aborts at once, but just in case, the first one in sequence is reported. |
| */ |
| void http_return_srv_error(struct session *s, struct stream_interface *si) |
| { |
| int err_type = si->err_type; |
| |
| if (err_type & SI_ET_QUEUE_ABRT) |
| http_server_error(s, si, SN_ERR_CLICL, SN_FINST_Q, |
| 503, error_message(s, HTTP_ERR_503)); |
| else if (err_type & SI_ET_CONN_ABRT) |
| http_server_error(s, si, SN_ERR_CLICL, SN_FINST_C, |
| 503, error_message(s, HTTP_ERR_503)); |
| else if (err_type & SI_ET_QUEUE_TO) |
| http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_Q, |
| 503, error_message(s, HTTP_ERR_503)); |
| else if (err_type & SI_ET_QUEUE_ERR) |
| http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_Q, |
| 503, error_message(s, HTTP_ERR_503)); |
| else if (err_type & SI_ET_CONN_TO) |
| http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_C, |
| 503, error_message(s, HTTP_ERR_503)); |
| else if (err_type & SI_ET_CONN_ERR) |
| http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_C, |
| 503, error_message(s, HTTP_ERR_503)); |
| else /* SI_ET_CONN_OTHER and others */ |
| http_server_error(s, si, SN_ERR_INTERNAL, SN_FINST_C, |
| 500, error_message(s, HTTP_ERR_500)); |
| } |
| |
| extern const char sess_term_cond[8]; |
| extern const char sess_fin_state[8]; |
| extern const char *monthname[12]; |
| const char sess_cookie[8] = "NIDVEO67"; /* No cookie, Invalid cookie, cookie for a Down server, Valid cookie, Expired cookie, Old cookie, unknown */ |
| const char sess_set_cookie[8] = "NPDIRU67"; /* No set-cookie, Set-cookie found and left unchanged (passive), |
| Set-cookie Deleted, Set-Cookie Inserted, Set-cookie Rewritten, |
| Set-cookie Updated, unknown, unknown */ |
| struct pool_head *pool2_requri; |
| struct pool_head *pool2_capture; |
| |
| void http_sess_clflog(struct session *s) |
| { |
| char pn[INET6_ADDRSTRLEN]; |
| struct proxy *fe = s->fe; |
| struct proxy *be = s->be; |
| struct proxy *prx_log; |
| struct http_txn *txn = &s->txn; |
| int tolog, level, err; |
| char *uri, *h; |
| char *svid; |
| struct tm tm; |
| static char tmpline[MAX_SYSLOG_LEN]; |
| int hdr; |
| size_t w; |
| int t_request; |
| |
| prx_log = fe; |
| err = (s->flags & (SN_ERR_MASK | SN_REDISP)) || |
| (s->req->cons->conn_retries != be->conn_retries) || |
| txn->status >= 500; |
| |
| if (s->cli_addr.ss_family == AF_INET) |
| inet_ntop(AF_INET, |
| (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr, |
| pn, sizeof(pn)); |
| else if (s->cli_addr.ss_family == AF_INET6) |
| inet_ntop(AF_INET6, |
| (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr, |
| pn, sizeof(pn)); |
| else |
| snprintf(pn, sizeof(pn), "unix:%d", s->listener->luid); |
| |
| get_gmtime(s->logs.accept_date.tv_sec, &tm); |
| |
| /* FIXME: let's limit ourselves to frontend logging for now. */ |
| tolog = fe->to_log; |
| |
| h = tmpline; |
| |
| w = snprintf(h, sizeof(tmpline), |
| "%s - - [%02d/%s/%04d:%02d:%02d:%02d +0000]", |
| pn, |
| tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900, |
| tm.tm_hour, tm.tm_min, tm.tm_sec); |
| if (w < 0 || w >= sizeof(tmpline) - (h - tmpline)) |
| goto trunc; |
| h += w; |
| |
| if (h >= tmpline + sizeof(tmpline) - 4) |
| goto trunc; |
| |
| *(h++) = ' '; |
| *(h++) = '\"'; |
| uri = txn->uri ? txn->uri : "<BADREQ>"; |
| h = encode_string(h, tmpline + sizeof(tmpline) - 1, |
| '#', url_encode_map, uri); |
| *(h++) = '\"'; |
| |
| w = snprintf(h, sizeof(tmpline) - (h - tmpline), " %d %lld", txn->status, s->logs.bytes_out); |
| if (w < 0 || w >= sizeof(tmpline) - (h - tmpline)) |
| goto trunc; |
| h += w; |
| |
| if (h >= tmpline + sizeof(tmpline) - 9) |
| goto trunc; |
| memcpy(h, " \"-\" \"-\"", 8); |
| h += 8; |
| |
| w = snprintf(h, sizeof(tmpline) - (h - tmpline), |
| " %d %03d", |
| s->cli_addr.ss_family == AF_UNIX ? s->listener->luid : |
| ntohs((s->cli_addr.ss_family == AF_INET) ? |
| ((struct sockaddr_in *)&s->cli_addr)->sin_port : |
| ((struct sockaddr_in6 *)&s->cli_addr)->sin6_port), |
| (int)s->logs.accept_date.tv_usec/1000); |
| if (w < 0 || w >= sizeof(tmpline) - (h - tmpline)) |
| goto trunc; |
| h += w; |
| |
| w = strlen(fe->id); |
| if (h >= tmpline + sizeof(tmpline) - 4 - w) |
| goto trunc; |
| *(h++) = ' '; |
| *(h++) = '\"'; |
| memcpy(h, fe->id, w); |
| h += w; |
| *(h++) = '\"'; |
| |
| w = strlen(be->id); |
| if (h >= tmpline + sizeof(tmpline) - 4 - w) |
| goto trunc; |
| *(h++) = ' '; |
| *(h++) = '\"'; |
| memcpy(h, be->id, w); |
| h += w; |
| *(h++) = '\"'; |
| |
| svid = (tolog & LW_SVID) ? |
| (s->data_source != DATA_SRC_STATS) ? |
| (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-"; |
| |
| w = strlen(svid); |
| if (h >= tmpline + sizeof(tmpline) - 4 - w) |
| goto trunc; |
| *(h++) = ' '; |
| *(h++) = '\"'; |
| memcpy(h, svid, w); |
| h += w; |
| *(h++) = '\"'; |
| |
| t_request = -1; |
| if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept)) |
| t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request); |
| w = snprintf(h, sizeof(tmpline) - (h - tmpline), |
| " %d %ld %ld %ld %ld", |
| t_request, |
| (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1, |
| (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1, |
| (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1, |
| s->logs.t_close); |
| if (w < 0 || w >= sizeof(tmpline) - (h - tmpline)) |
| goto trunc; |
| h += w; |
| |
| if (h >= tmpline + sizeof(tmpline) - 8) |
| goto trunc; |
| *(h++) = ' '; |
| *(h++) = '\"'; |
| *(h++) = sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT]; |
| *(h++) = sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT]; |
| *(h++) = (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-', |
| *(h++) = (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-'; |
| *(h++) = '\"'; |
| |
| w = snprintf(h, sizeof(tmpline) - (h - tmpline), |
| " %d %d %d %d %d %ld %ld", |
| actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0, |
| (s->req->cons->conn_retries > 0) ? (be->conn_retries - s->req->cons->conn_retries) : be->conn_retries, |
| s->logs.srv_queue_size, s->logs.prx_queue_size); |
| |
| if (w < 0 || w >= sizeof(tmpline) - (h - tmpline)) |
| goto trunc; |
| h += w; |
| |
| if (txn->cli_cookie) { |
| w = strlen(txn->cli_cookie); |
| if (h >= tmpline + sizeof(tmpline) - 4 - w) |
| goto trunc; |
| *(h++) = ' '; |
| *(h++) = '\"'; |
| memcpy(h, txn->cli_cookie, w); |
| h += w; |
| *(h++) = '\"'; |
| } else { |
| if (h >= tmpline + sizeof(tmpline) - 5) |
| goto trunc; |
| memcpy(h, " \"-\"", 4); |
| h += 4; |
| } |
| |
| if (txn->srv_cookie) { |
| w = strlen(txn->srv_cookie); |
| if (h >= tmpline + sizeof(tmpline) - 4 - w) |
| goto trunc; |
| *(h++) = ' '; |
| *(h++) = '\"'; |
| memcpy(h, txn->srv_cookie, w); |
| h += w; |
| *(h++) = '\"'; |
| } else { |
| if (h >= tmpline + sizeof(tmpline) - 5) |
| goto trunc; |
| memcpy(h, " \"-\"", 4); |
| h += 4; |
| } |
| |
| if ((fe->to_log & LW_REQHDR) && txn->req.cap) { |
| for (hdr = 0; hdr < fe->nb_req_cap; hdr++) { |
| if (h >= sizeof (tmpline) + tmpline - 4) |
| goto trunc; |
| if (txn->req.cap[hdr] != NULL) { |
| *(h++) = ' '; |
| *(h++) = '\"'; |
| h = encode_string(h, tmpline + sizeof(tmpline) - 2, |
| '#', hdr_encode_map, txn->req.cap[hdr]); |
| *(h++) = '\"'; |
| } else { |
| memcpy(h, " \"-\"", 4); |
| h += 4; |
| } |
| } |
| } |
| |
| if ((fe->to_log & LW_RSPHDR) && txn->rsp.cap) { |
| for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) { |
| if (h >= sizeof (tmpline) + tmpline - 4) |
| goto trunc; |
| if (txn->rsp.cap[hdr] != NULL) { |
| *(h++) = ' '; |
| *(h++) = '\"'; |
| h = encode_string(h, tmpline + sizeof(tmpline) - 2, |
| '#', hdr_encode_map, txn->rsp.cap[hdr]); |
| *(h++) = '\"'; |
| } else { |
| memcpy(h, " \"-\"", 4); |
| h += 4; |
| } |
| } |
| } |
| |
| trunc: |
| *h = '\0'; |
| |
| level = LOG_INFO; |
| if (err && (fe->options2 & PR_O2_LOGERRORS)) |
| level = LOG_ERR; |
| |
| send_log(prx_log, level, "%s\n", tmpline); |
| |
| s->logs.logwait = 0; |
| } |
| |
| /* |
| * send a log for the session when we have enough info about it. |
| * Will not log if the frontend has no log defined. |
| */ |
| void http_sess_log(struct session *s) |
| { |
| char pn[INET6_ADDRSTRLEN]; |
| struct proxy *fe = s->fe; |
| struct proxy *be = s->be; |
| struct proxy *prx_log; |
| struct http_txn *txn = &s->txn; |
| int tolog, level, err; |
| char *uri, *h; |
| char *svid; |
| struct tm tm; |
| static char tmpline[MAX_SYSLOG_LEN]; |
| int t_request; |
| int hdr; |
| |
| /* if we don't want to log normal traffic, return now */ |
| err = (s->flags & (SN_ERR_MASK | SN_REDISP)) || |
| (s->req->cons->conn_retries != be->conn_retries) || |
| txn->status >= 500; |
| if (!err && (fe->options2 & PR_O2_NOLOGNORM)) |
| return; |
| |
| if (fe->logfac1 < 0 && fe->logfac2 < 0) |
| return; |
| prx_log = fe; |
| |
| if (prx_log->options2 & PR_O2_CLFLOG) |
| return http_sess_clflog(s); |
| |
| if (s->cli_addr.ss_family == AF_INET) |
| inet_ntop(AF_INET, |
| (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr, |
| pn, sizeof(pn)); |
| else if (s->cli_addr.ss_family == AF_INET6) |
| inet_ntop(AF_INET6, |
| (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr, |
| pn, sizeof(pn)); |
| |
| get_localtime(s->logs.accept_date.tv_sec, &tm); |
| |
| /* FIXME: let's limit ourselves to frontend logging for now. */ |
| tolog = fe->to_log; |
| |
| h = tmpline; |
| if (fe->to_log & LW_REQHDR && |
| txn->req.cap && |
| (h < tmpline + sizeof(tmpline) - 10)) { |
| *(h++) = ' '; |
| *(h++) = '{'; |
| for (hdr = 0; hdr < fe->nb_req_cap; hdr++) { |
| if (hdr) |
| *(h++) = '|'; |
| if (txn->req.cap[hdr] != NULL) |
| h = encode_string(h, tmpline + sizeof(tmpline) - 7, |
| '#', hdr_encode_map, txn->req.cap[hdr]); |
| } |
| *(h++) = '}'; |
| } |
| |
| if (fe->to_log & LW_RSPHDR && |
| txn->rsp.cap && |
| (h < tmpline + sizeof(tmpline) - 7)) { |
| *(h++) = ' '; |
| *(h++) = '{'; |
| for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) { |
| if (hdr) |
| *(h++) = '|'; |
| if (txn->rsp.cap[hdr] != NULL) |
| h = encode_string(h, tmpline + sizeof(tmpline) - 4, |
| '#', hdr_encode_map, txn->rsp.cap[hdr]); |
| } |
| *(h++) = '}'; |
| } |
| |
| if (h < tmpline + sizeof(tmpline) - 4) { |
| *(h++) = ' '; |
| *(h++) = '"'; |
| uri = txn->uri ? txn->uri : "<BADREQ>"; |
| h = encode_string(h, tmpline + sizeof(tmpline) - 1, |
| '#', url_encode_map, uri); |
| *(h++) = '"'; |
| } |
| *h = '\0'; |
| |
| svid = (tolog & LW_SVID) ? |
| (s->data_source != DATA_SRC_STATS) ? |
| (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-"; |
| |
| t_request = -1; |
| if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept)) |
| t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request); |
| |
| level = LOG_INFO; |
| if (err && (fe->options2 & PR_O2_LOGERRORS)) |
| level = LOG_ERR; |
| |
| send_log(prx_log, level, |
| "%s:%d [%02d/%s/%04d:%02d:%02d:%02d.%03d]" |
| " %s %s/%s %d/%ld/%ld/%ld/%s%ld %d %s%lld" |
| " %s %s %c%c%c%c %d/%d/%d/%d/%s%u %ld/%ld%s\n", |
| (s->cli_addr.ss_family == AF_UNIX) ? "unix" : pn, |
| (s->cli_addr.ss_family == AF_UNIX) ? s->listener->luid : |
| ntohs((s->cli_addr.ss_family == AF_INET) ? |
| ((struct sockaddr_in *)&s->cli_addr)->sin_port : |
| ((struct sockaddr_in6 *)&s->cli_addr)->sin6_port), |
| tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900, |
| tm.tm_hour, tm.tm_min, tm.tm_sec, (int)s->logs.accept_date.tv_usec/1000, |
| fe->id, be->id, svid, |
| t_request, |
| (s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1, |
| (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1, |
| (s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1, |
| (tolog & LW_BYTES) ? "" : "+", s->logs.t_close, |
| txn->status, |
| (tolog & LW_BYTES) ? "" : "+", s->logs.bytes_out, |
| txn->cli_cookie ? txn->cli_cookie : "-", |
| txn->srv_cookie ? txn->srv_cookie : "-", |
| sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT], |
| sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT], |
| (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-', |
| (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-', |
| actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0, |
| (s->flags & SN_REDISP)?"+":"", |
| (s->req->cons->conn_retries>0)?(be->conn_retries - s->req->cons->conn_retries):be->conn_retries, |
| s->logs.srv_queue_size, s->logs.prx_queue_size, tmpline); |
| |
| s->logs.logwait = 0; |
| } |
| |
| |
| /* |
| * Capture headers from message starting at <som> according to header list |
| * <cap_hdr>, and fill the <idx> structure appropriately. |
| */ |
| void capture_headers(char *som, struct hdr_idx *idx, |
| char **cap, struct cap_hdr *cap_hdr) |
| { |
| char *eol, *sol, *col, *sov; |
| int cur_idx; |
| struct cap_hdr *h; |
| int len; |
| |
| sol = som + hdr_idx_first_pos(idx); |
| cur_idx = hdr_idx_first_idx(idx); |
| |
| while (cur_idx) { |
| eol = sol + idx->v[cur_idx].len; |
| |
| col = sol; |
| while (col < eol && *col != ':') |
| col++; |
| |
| sov = col + 1; |
| while (sov < eol && http_is_lws[(unsigned char)*sov]) |
| sov++; |
| |
| for (h = cap_hdr; h; h = h->next) { |
| if ((h->namelen == col - sol) && |
| (strncasecmp(sol, h->name, h->namelen) == 0)) { |
| if (cap[h->index] == NULL) |
| cap[h->index] = |
| pool_alloc2(h->pool); |
| |
| if (cap[h->index] == NULL) { |
| Alert("HTTP capture : out of memory.\n"); |
| continue; |
| } |
| |
| len = eol - sov; |
| if (len > h->len) |
| len = h->len; |
| |
| memcpy(cap[h->index], sov, len); |
| cap[h->index][len]=0; |
| } |
| } |
| sol = eol + idx->v[cur_idx].cr + 1; |
| cur_idx = idx->v[cur_idx].next; |
| } |
| } |
| |
| |
| /* either we find an LF at <ptr> or we jump to <bad>. |
| */ |
| #define EXPECT_LF_HERE(ptr, bad) do { if (unlikely(*(ptr) != '\n')) goto bad; } while (0) |
| |
| /* plays with variables <ptr>, <end> and <state>. Jumps to <good> if OK, |
| * otherwise to <http_msg_ood> with <state> set to <st>. |
| */ |
| #define EAT_AND_JUMP_OR_RETURN(good, st) do { \ |
| ptr++; \ |
| if (likely(ptr < end)) \ |
| goto good; \ |
| else { \ |
| state = (st); \ |
| goto http_msg_ood; \ |
| } \ |
| } while (0) |
| |
| |
| /* |
| * This function parses a status line between <ptr> and <end>, starting with |
| * parser state <state>. Only states HTTP_MSG_RPVER, HTTP_MSG_RPVER_SP, |
| * HTTP_MSG_RPCODE, HTTP_MSG_RPCODE_SP and HTTP_MSG_RPREASON are handled. Others |
| * will give undefined results. |
| * Note that it is upon the caller's responsibility to ensure that ptr < end, |
| * and that msg->sol points to the beginning of the response. |
| * If a complete line is found (which implies that at least one CR or LF is |
| * found before <end>, the updated <ptr> is returned, otherwise NULL is |
| * returned indicating an incomplete line (which does not mean that parts have |
| * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are |
| * non-NULL, they are fed with the new <ptr> and <state> values to be passed |
| * upon next call. |
| * |
| * This function was intentionally designed to be called from |
| * http_msg_analyzer() with the lowest overhead. It should integrate perfectly |
| * within its state machine and use the same macros, hence the need for same |
| * labels and variable names. Note that msg->sol is left unchanged. |
| */ |
| const char *http_parse_stsline(struct http_msg *msg, const char *msg_buf, |
| unsigned int state, const char *ptr, const char *end, |
| char **ret_ptr, unsigned int *ret_state) |
| { |
| switch (state) { |
| case HTTP_MSG_RPVER: |
| http_msg_rpver: |
| if (likely(HTTP_IS_VER_TOKEN(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rpver, HTTP_MSG_RPVER); |
| |
| if (likely(HTTP_IS_SPHT(*ptr))) { |
| msg->sl.st.v_l = (ptr - msg_buf) - msg->som; |
| EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP); |
| } |
| state = HTTP_MSG_ERROR; |
| break; |
| |
| case HTTP_MSG_RPVER_SP: |
| http_msg_rpver_sp: |
| if (likely(!HTTP_IS_LWS(*ptr))) { |
| msg->sl.st.c = (ptr - msg_buf) - msg->som; |
| goto http_msg_rpcode; |
| } |
| if (likely(HTTP_IS_SPHT(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP); |
| /* so it's a CR/LF, this is invalid */ |
| state = HTTP_MSG_ERROR; |
| break; |
| |
| case HTTP_MSG_RPCODE: |
| http_msg_rpcode: |
| if (likely(!HTTP_IS_LWS(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rpcode, HTTP_MSG_RPCODE); |
| |
| if (likely(HTTP_IS_SPHT(*ptr))) { |
| msg->sl.st.c_l = (ptr - msg_buf) - msg->som - msg->sl.st.c; |
| EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP); |
| } |
| |
| /* so it's a CR/LF, so there is no reason phrase */ |
| msg->sl.st.c_l = (ptr - msg_buf) - msg->som - msg->sl.st.c; |
| http_msg_rsp_reason: |
| /* FIXME: should we support HTTP responses without any reason phrase ? */ |
| msg->sl.st.r = (ptr - msg_buf) - msg->som; |
| msg->sl.st.r_l = 0; |
| goto http_msg_rpline_eol; |
| |
| case HTTP_MSG_RPCODE_SP: |
| http_msg_rpcode_sp: |
| if (likely(!HTTP_IS_LWS(*ptr))) { |
| msg->sl.st.r = (ptr - msg_buf) - msg->som; |
| goto http_msg_rpreason; |
| } |
| if (likely(HTTP_IS_SPHT(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP); |
| /* so it's a CR/LF, so there is no reason phrase */ |
| goto http_msg_rsp_reason; |
| |
| case HTTP_MSG_RPREASON: |
| http_msg_rpreason: |
| if (likely(!HTTP_IS_CRLF(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rpreason, HTTP_MSG_RPREASON); |
| msg->sl.st.r_l = (ptr - msg_buf) - msg->som - msg->sl.st.r; |
| http_msg_rpline_eol: |
| /* We have seen the end of line. Note that we do not |
| * necessarily have the \n yet, but at least we know that we |
| * have EITHER \r OR \n, otherwise the response would not be |
| * complete. We can then record the response length and return |
| * to the caller which will be able to register it. |
| */ |
| msg->sl.st.l = ptr - msg->sol; |
| return ptr; |
| |
| #ifdef DEBUG_FULL |
| default: |
| fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state); |
| exit(1); |
| #endif |
| } |
| |
| http_msg_ood: |
| /* out of valid data */ |
| if (ret_state) |
| *ret_state = state; |
| if (ret_ptr) |
| *ret_ptr = (char *)ptr; |
| return NULL; |
| } |
| |
| /* |
| * This function parses a request line between <ptr> and <end>, starting with |
| * parser state <state>. Only states HTTP_MSG_RQMETH, HTTP_MSG_RQMETH_SP, |
| * HTTP_MSG_RQURI, HTTP_MSG_RQURI_SP and HTTP_MSG_RQVER are handled. Others |
| * will give undefined results. |
| * Note that it is upon the caller's responsibility to ensure that ptr < end, |
| * and that msg->sol points to the beginning of the request. |
| * If a complete line is found (which implies that at least one CR or LF is |
| * found before <end>, the updated <ptr> is returned, otherwise NULL is |
| * returned indicating an incomplete line (which does not mean that parts have |
| * not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are |
| * non-NULL, they are fed with the new <ptr> and <state> values to be passed |
| * upon next call. |
| * |
| * This function was intentionally designed to be called from |
| * http_msg_analyzer() with the lowest overhead. It should integrate perfectly |
| * within its state machine and use the same macros, hence the need for same |
| * labels and variable names. Note that msg->sol is left unchanged. |
| */ |
| const char *http_parse_reqline(struct http_msg *msg, const char *msg_buf, |
| unsigned int state, const char *ptr, const char *end, |
| char **ret_ptr, unsigned int *ret_state) |
| { |
| switch (state) { |
| case HTTP_MSG_RQMETH: |
| http_msg_rqmeth: |
| if (likely(HTTP_IS_TOKEN(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth, HTTP_MSG_RQMETH); |
| |
| if (likely(HTTP_IS_SPHT(*ptr))) { |
| msg->sl.rq.m_l = (ptr - msg_buf) - msg->som; |
| EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP); |
| } |
| |
| if (likely(HTTP_IS_CRLF(*ptr))) { |
| /* HTTP 0.9 request */ |
| msg->sl.rq.m_l = (ptr - msg_buf) - msg->som; |
| http_msg_req09_uri: |
| msg->sl.rq.u = (ptr - msg_buf) - msg->som; |
| http_msg_req09_uri_e: |
| msg->sl.rq.u_l = (ptr - msg_buf) - msg->som - msg->sl.rq.u; |
| http_msg_req09_ver: |
| msg->sl.rq.v = (ptr - msg_buf) - msg->som; |
| msg->sl.rq.v_l = 0; |
| goto http_msg_rqline_eol; |
| } |
| state = HTTP_MSG_ERROR; |
| break; |
| |
| case HTTP_MSG_RQMETH_SP: |
| http_msg_rqmeth_sp: |
| if (likely(!HTTP_IS_LWS(*ptr))) { |
| msg->sl.rq.u = (ptr - msg_buf) - msg->som; |
| goto http_msg_rquri; |
| } |
| if (likely(HTTP_IS_SPHT(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP); |
| /* so it's a CR/LF, meaning an HTTP 0.9 request */ |
| goto http_msg_req09_uri; |
| |
| case HTTP_MSG_RQURI: |
| http_msg_rquri: |
| if (likely(!HTTP_IS_LWS(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rquri, HTTP_MSG_RQURI); |
| |
| if (likely(HTTP_IS_SPHT(*ptr))) { |
| msg->sl.rq.u_l = (ptr - msg_buf) - msg->som - msg->sl.rq.u; |
| EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP); |
| } |
| |
| /* so it's a CR/LF, meaning an HTTP 0.9 request */ |
| goto http_msg_req09_uri_e; |
| |
| case HTTP_MSG_RQURI_SP: |
| http_msg_rquri_sp: |
| if (likely(!HTTP_IS_LWS(*ptr))) { |
| msg->sl.rq.v = (ptr - msg_buf) - msg->som; |
| goto http_msg_rqver; |
| } |
| if (likely(HTTP_IS_SPHT(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP); |
| /* so it's a CR/LF, meaning an HTTP 0.9 request */ |
| goto http_msg_req09_ver; |
| |
| case HTTP_MSG_RQVER: |
| http_msg_rqver: |
| if (likely(HTTP_IS_VER_TOKEN(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rqver, HTTP_MSG_RQVER); |
| |
| if (likely(HTTP_IS_CRLF(*ptr))) { |
| msg->sl.rq.v_l = (ptr - msg_buf) - msg->som - msg->sl.rq.v; |
| http_msg_rqline_eol: |
| /* We have seen the end of line. Note that we do not |
| * necessarily have the \n yet, but at least we know that we |
| * have EITHER \r OR \n, otherwise the request would not be |
| * complete. We can then record the request length and return |
| * to the caller which will be able to register it. |
| */ |
| msg->sl.rq.l = ptr - msg->sol; |
| return ptr; |
| } |
| |
| /* neither an HTTP_VER token nor a CRLF */ |
| state = HTTP_MSG_ERROR; |
| break; |
| |
| #ifdef DEBUG_FULL |
| default: |
| fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state); |
| exit(1); |
| #endif |
| } |
| |
| http_msg_ood: |
| /* out of valid data */ |
| if (ret_state) |
| *ret_state = state; |
| if (ret_ptr) |
| *ret_ptr = (char *)ptr; |
| return NULL; |
| } |
| |
| /* |
| * Returns the data from Authorization header. Function may be called more |
| * than once so data is stored in txn->auth_data. When no header is found |
| * or auth method is unknown auth_method is set to HTTP_AUTH_WRONG to avoid |
| * searching again for something we are unable to find anyway. |
| */ |
| |
| char get_http_auth_buff[BUFSIZE]; |
| |
| int |
| get_http_auth(struct session *s) |
| { |
| |
| struct http_txn *txn = &s->txn; |
| struct chunk auth_method; |
| struct hdr_ctx ctx; |
| char *h, *p; |
| int len; |
| |
| #ifdef DEBUG_AUTH |
| printf("Auth for session %p: %d\n", s, txn->auth.method); |
| #endif |
| |
| if (txn->auth.method == HTTP_AUTH_WRONG) |
| return 0; |
| |
| if (txn->auth.method) |
| return 1; |
| |
| txn->auth.method = HTTP_AUTH_WRONG; |
| |
| ctx.idx = 0; |
| |
| if (txn->flags & TX_USE_PX_CONN) { |
| h = "Proxy-Authorization"; |
| len = strlen(h); |
| } else { |
| h = "Authorization"; |
| len = strlen(h); |
| } |
| |
| if (!http_find_header2(h, len, txn->req.sol, &txn->hdr_idx, &ctx)) |
| return 0; |
| |
| h = ctx.line + ctx.val; |
| |
| p = memchr(h, ' ', ctx.vlen); |
| if (!p || p == h) |
| return 0; |
| |
| chunk_initlen(&auth_method, h, 0, p-h); |
| chunk_initlen(&txn->auth.method_data, p+1, 0, ctx.vlen-(p-h)-1); |
| |
| if (!strncasecmp("Basic", auth_method.str, auth_method.len)) { |
| |
| len = base64dec(txn->auth.method_data.str, txn->auth.method_data.len, |
| get_http_auth_buff, BUFSIZE - 1); |
| |
| if (len < 0) |
| return 0; |
| |
| |
| get_http_auth_buff[len] = '\0'; |
| |
| p = strchr(get_http_auth_buff, ':'); |
| |
| if (!p) |
| return 0; |
| |
| txn->auth.user = get_http_auth_buff; |
| *p = '\0'; |
| txn->auth.pass = p+1; |
| |
| txn->auth.method = HTTP_AUTH_BASIC; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| |
| /* |
| * This function parses an HTTP message, either a request or a response, |
| * depending on the initial msg->msg_state. It can be preempted everywhere |
| * when data are missing and recalled at the exact same location with no |
| * information loss. The header index is re-initialized when switching from |
| * MSG_R[PQ]BEFORE to MSG_RPVER|MSG_RQMETH. It modifies msg->sol among other |
| * fields. Note that msg->som and msg->sol will be initialized after completing |
| * the first state, so that none of the msg pointers has to be initialized |
| * prior to the first call. |
| */ |
| void http_msg_analyzer(struct buffer *buf, struct http_msg *msg, struct hdr_idx *idx) |
| { |
| unsigned int state; /* updated only when leaving the FSM */ |
| register char *ptr, *end; /* request pointers, to avoid dereferences */ |
| |
| state = msg->msg_state; |
| ptr = buf->lr; |
| end = buf->r; |
| |
| if (unlikely(ptr >= end)) |
| goto http_msg_ood; |
| |
| switch (state) { |
| /* |
| * First, states that are specific to the response only. |
| * We check them first so that request and headers are |
| * closer to each other (accessed more often). |
| */ |
| case HTTP_MSG_RPBEFORE: |
| http_msg_rpbefore: |
| if (likely(HTTP_IS_TOKEN(*ptr))) { |
| /* we have a start of message, but we have to check |
| * first if we need to remove some CRLF. We can only |
| * do this when send_max=0. |
| */ |
| char *beg = buf->w + buf->send_max; |
| if (beg >= buf->data + buf->size) |
| beg -= buf->size; |
| if (unlikely(ptr != beg)) { |
| if (buf->send_max) |
| goto http_msg_ood; |
| /* Remove empty leading lines, as recommended by RFC2616. */ |
| buffer_ignore(buf, ptr - beg); |
| } |
| msg->som = ptr - buf->data; |
| msg->sol = ptr; |
| hdr_idx_init(idx); |
| state = HTTP_MSG_RPVER; |
| goto http_msg_rpver; |
| } |
| |
| if (unlikely(!HTTP_IS_CRLF(*ptr))) |
| goto http_msg_invalid; |
| |
| if (unlikely(*ptr == '\n')) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE); |
| EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore_cr, HTTP_MSG_RPBEFORE_CR); |
| /* stop here */ |
| |
| case HTTP_MSG_RPBEFORE_CR: |
| http_msg_rpbefore_cr: |
| EXPECT_LF_HERE(ptr, http_msg_invalid); |
| EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE); |
| /* stop here */ |
| |
| case HTTP_MSG_RPVER: |
| http_msg_rpver: |
| case HTTP_MSG_RPVER_SP: |
| case HTTP_MSG_RPCODE: |
| case HTTP_MSG_RPCODE_SP: |
| case HTTP_MSG_RPREASON: |
| ptr = (char *)http_parse_stsline(msg, buf->data, state, ptr, end, |
| &buf->lr, &msg->msg_state); |
| if (unlikely(!ptr)) |
| return; |
| |
| /* we have a full response and we know that we have either a CR |
| * or an LF at <ptr>. |
| */ |
| //fprintf(stderr,"som=%d rq.l=%d *ptr=0x%02x\n", msg->som, msg->sl.st.l, *ptr); |
| hdr_idx_set_start(idx, msg->sl.st.l, *ptr == '\r'); |
| |
| msg->sol = ptr; |
| if (likely(*ptr == '\r')) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rpline_end, HTTP_MSG_RPLINE_END); |
| goto http_msg_rpline_end; |
| |
| case HTTP_MSG_RPLINE_END: |
| http_msg_rpline_end: |
| /* msg->sol must point to the first of CR or LF. */ |
| EXPECT_LF_HERE(ptr, http_msg_invalid); |
| EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST); |
| /* stop here */ |
| |
| /* |
| * Second, states that are specific to the request only |
| */ |
| case HTTP_MSG_RQBEFORE: |
| http_msg_rqbefore: |
| if (likely(HTTP_IS_TOKEN(*ptr))) { |
| /* we have a start of message, but we have to check |
| * first if we need to remove some CRLF. We can only |
| * do this when send_max=0. |
| */ |
| char *beg = buf->w + buf->send_max; |
| if (beg >= buf->data + buf->size) |
| beg -= buf->size; |
| if (likely(ptr != beg)) { |
| if (buf->send_max) |
| goto http_msg_ood; |
| /* Remove empty leading lines, as recommended by RFC2616. */ |
| buffer_ignore(buf, ptr - beg); |
| } |
| msg->som = ptr - buf->data; |
| msg->sol = ptr; |
| /* we will need this when keep-alive will be supported |
| hdr_idx_init(idx); |
| */ |
| state = HTTP_MSG_RQMETH; |
| goto http_msg_rqmeth; |
| } |
| |
| if (unlikely(!HTTP_IS_CRLF(*ptr))) |
| goto http_msg_invalid; |
| |
| if (unlikely(*ptr == '\n')) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE); |
| EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore_cr, HTTP_MSG_RQBEFORE_CR); |
| /* stop here */ |
| |
| case HTTP_MSG_RQBEFORE_CR: |
| http_msg_rqbefore_cr: |
| EXPECT_LF_HERE(ptr, http_msg_invalid); |
| EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE); |
| /* stop here */ |
| |
| case HTTP_MSG_RQMETH: |
| http_msg_rqmeth: |
| case HTTP_MSG_RQMETH_SP: |
| case HTTP_MSG_RQURI: |
| case HTTP_MSG_RQURI_SP: |
| case HTTP_MSG_RQVER: |
| ptr = (char *)http_parse_reqline(msg, buf->data, state, ptr, end, |
| &buf->lr, &msg->msg_state); |
| if (unlikely(!ptr)) |
| return; |
| |
| /* we have a full request and we know that we have either a CR |
| * or an LF at <ptr>. |
| */ |
| //fprintf(stderr,"som=%d rq.l=%d *ptr=0x%02x\n", msg->som, msg->sl.rq.l, *ptr); |
| hdr_idx_set_start(idx, msg->sl.rq.l, *ptr == '\r'); |
| |
| msg->sol = ptr; |
| if (likely(*ptr == '\r')) |
| EAT_AND_JUMP_OR_RETURN(http_msg_rqline_end, HTTP_MSG_RQLINE_END); |
| goto http_msg_rqline_end; |
| |
| case HTTP_MSG_RQLINE_END: |
| http_msg_rqline_end: |
| /* check for HTTP/0.9 request : no version information available. |
| * msg->sol must point to the first of CR or LF. |
| */ |
| if (unlikely(msg->sl.rq.v_l == 0)) |
| goto http_msg_last_lf; |
| |
| EXPECT_LF_HERE(ptr, http_msg_invalid); |
| EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST); |
| /* stop here */ |
| |
| /* |
| * Common states below |
| */ |
| case HTTP_MSG_HDR_FIRST: |
| http_msg_hdr_first: |
| msg->sol = ptr; |
| if (likely(!HTTP_IS_CRLF(*ptr))) { |
| goto http_msg_hdr_name; |
| } |
| |
| if (likely(*ptr == '\r')) |
| EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF); |
| goto http_msg_last_lf; |
| |
| case HTTP_MSG_HDR_NAME: |
| http_msg_hdr_name: |
| /* assumes msg->sol points to the first char */ |
| if (likely(HTTP_IS_TOKEN(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME); |
| |
| if (likely(*ptr == ':')) { |
| msg->col = ptr - buf->data; |
| EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP); |
| } |
| |
| if (likely(msg->err_pos < -1) || *ptr == '\n') |
| goto http_msg_invalid; |
| |
| if (msg->err_pos == -1) /* capture error pointer */ |
| msg->err_pos = ptr - buf->data; /* >= 0 now */ |
| |
| /* and we still accept this non-token character */ |
| EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME); |
| |
| case HTTP_MSG_HDR_L1_SP: |
| http_msg_hdr_l1_sp: |
| /* assumes msg->sol points to the first char and msg->col to the colon */ |
| if (likely(HTTP_IS_SPHT(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP); |
| |
| /* header value can be basically anything except CR/LF */ |
| msg->sov = ptr - buf->data; |
| |
| if (likely(!HTTP_IS_CRLF(*ptr))) { |
| goto http_msg_hdr_val; |
| } |
| |
| if (likely(*ptr == '\r')) |
| EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lf, HTTP_MSG_HDR_L1_LF); |
| goto http_msg_hdr_l1_lf; |
| |
| case HTTP_MSG_HDR_L1_LF: |
| http_msg_hdr_l1_lf: |
| EXPECT_LF_HERE(ptr, http_msg_invalid); |
| EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lws, HTTP_MSG_HDR_L1_LWS); |
| |
| case HTTP_MSG_HDR_L1_LWS: |
| http_msg_hdr_l1_lws: |
| if (likely(HTTP_IS_SPHT(*ptr))) { |
| /* replace HT,CR,LF with spaces */ |
| for (; buf->data+msg->sov < ptr; msg->sov++) |
| buf->data[msg->sov] = ' '; |
| goto http_msg_hdr_l1_sp; |
| } |
| /* we had a header consisting only in spaces ! */ |
| msg->eol = buf->data + msg->sov; |
| goto http_msg_complete_header; |
| |
| case HTTP_MSG_HDR_VAL: |
| http_msg_hdr_val: |
| /* assumes msg->sol points to the first char, msg->col to the |
| * colon, and msg->sov points to the first character of the |
| * value. |
| */ |
| if (likely(!HTTP_IS_CRLF(*ptr))) |
| EAT_AND_JUMP_OR_RETURN(http_msg_hdr_val, HTTP_MSG_HDR_VAL); |
| |
| msg->eol = ptr; |
| /* Note: we could also copy eol into ->eoh so that we have the |
| * real header end in case it ends with lots of LWS, but is this |
| * really needed ? |
| */ |
| if (likely(*ptr == '\r')) |
| EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lf, HTTP_MSG_HDR_L2_LF); |
| goto http_msg_hdr_l2_lf; |
| |
| case HTTP_MSG_HDR_L2_LF: |
| http_msg_hdr_l2_lf: |
| EXPECT_LF_HERE(ptr, http_msg_invalid); |
| EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lws, HTTP_MSG_HDR_L2_LWS); |
| |
| case HTTP_MSG_HDR_L2_LWS: |
| http_msg_hdr_l2_lws: |
| if (unlikely(HTTP_IS_SPHT(*ptr))) { |
| /* LWS: replace HT,CR,LF with spaces */ |
| for (; msg->eol < ptr; msg->eol++) |
| *msg->eol = ' '; |
| goto http_msg_hdr_val; |
| } |
| http_msg_complete_header: |
| /* |
| * It was a new header, so the last one is finished. |
| * Assumes msg->sol points to the first char, msg->col to the |
| * colon, msg->sov points to the first character of the value |
| * and msg->eol to the first CR or LF so we know how the line |
| * ends. We insert last header into the index. |
| */ |
| /* |
| fprintf(stderr,"registering %-2d bytes : ", msg->eol - msg->sol); |
| write(2, msg->sol, msg->eol-msg->sol); |
| fprintf(stderr,"\n"); |
| */ |
| |
| if (unlikely(hdr_idx_add(msg->eol - msg->sol, *msg->eol == '\r', |
| idx, idx->tail) < 0)) |
| goto http_msg_invalid; |
| |
| msg->sol = ptr; |
| if (likely(!HTTP_IS_CRLF(*ptr))) { |
| goto http_msg_hdr_name; |
| } |
| |
| if (likely(*ptr == '\r')) |
| EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF); |
| goto http_msg_last_lf; |
| |
| case HTTP_MSG_LAST_LF: |
| http_msg_last_lf: |
| /* Assumes msg->sol points to the first of either CR or LF */ |
| EXPECT_LF_HERE(ptr, http_msg_invalid); |
| ptr++; |
| buf->lr = ptr; |
| msg->col = msg->sov = buf->lr - buf->data; |
| msg->eoh = msg->sol - buf->data; |
| msg->sol = buf->data + msg->som; |
| msg->msg_state = HTTP_MSG_BODY; |
| return; |
| #ifdef DEBUG_FULL |
| default: |
| fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state); |
| exit(1); |
| #endif |
| } |
| http_msg_ood: |
| /* out of data */ |
| msg->msg_state = state; |
| buf->lr = ptr; |
| return; |
| |
| http_msg_invalid: |
| /* invalid message */ |
| msg->msg_state = HTTP_MSG_ERROR; |
| buf->lr = ptr; |
| return; |
| } |
| |
| /* convert an HTTP/0.9 request into an HTTP/1.0 request. Returns 1 if the |
| * conversion succeeded, 0 in case of error. If the request was already 1.X, |
| * nothing is done and 1 is returned. |
| */ |
| static int http_upgrade_v09_to_v10(struct buffer *req, struct http_msg *msg, struct http_txn *txn) |
| { |
| int delta; |
| char *cur_end; |
| |
| if (msg->sl.rq.v_l != 0) |
| return 1; |
| |
| cur_end = msg->sol + msg->sl.rq.l; |
| delta = 0; |
| |
| if (msg->sl.rq.u_l == 0) { |
| /* if no URI was set, add "/" */ |
| delta = buffer_replace2(req, cur_end, cur_end, " /", 2); |
| cur_end += delta; |
| http_msg_move_end(msg, delta); |
| } |
| /* add HTTP version */ |
| delta = buffer_replace2(req, cur_end, cur_end, " HTTP/1.0\r\n", 11); |
| http_msg_move_end(msg, delta); |
| cur_end += delta; |
| cur_end = (char *)http_parse_reqline(msg, req->data, |
| HTTP_MSG_RQMETH, |
| msg->sol, cur_end + 1, |
| NULL, NULL); |
| if (unlikely(!cur_end)) |
| return 0; |
| |
| /* we have a full HTTP/1.0 request now and we know that |
| * we have either a CR or an LF at <ptr>. |
| */ |
| hdr_idx_set_start(&txn->hdr_idx, msg->sl.rq.l, *cur_end == '\r'); |
| return 1; |
| } |
| |
| /* Parse the Connection: header of an HTTP request, looking for both "close" |
| * and "keep-alive" values. If a buffer is provided and we already know that |
| * some headers may safely be removed, we remove them now. The <to_del> flags |
| * are used for that : |
| * - bit 0 means remove "close" headers (in HTTP/1.0 requests/responses) |
| * - bit 1 means remove "keep-alive" headers (in HTTP/1.1 reqs/resp to 1.1). |
| * The TX_HDR_CONN_* flags are adjusted in txn->flags depending on what was |
| * found, and TX_CON_*_SET is adjusted depending on what is left so only |
| * harmless combinations may be removed. Do not call that after changes have |
| * been processed. If unused, the buffer can be NULL, and no data will be |
| * changed. |
| */ |
| void http_parse_connection_header(struct http_txn *txn, struct http_msg *msg, struct buffer *buf, int to_del) |
| { |
| struct hdr_ctx ctx; |
| const char *hdr_val = "Connection"; |
| int hdr_len = 10; |
| |
| if (txn->flags & TX_HDR_CONN_PRS) |
| return; |
| |
| if (unlikely(txn->flags & TX_USE_PX_CONN)) { |
| hdr_val = "Proxy-Connection"; |
| hdr_len = 16; |
| } |
| |
| ctx.idx = 0; |
| txn->flags &= ~(TX_CON_KAL_SET|TX_CON_CLO_SET); |
| while (http_find_header2(hdr_val, hdr_len, msg->sol, &txn->hdr_idx, &ctx)) { |
| if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) { |
| txn->flags |= TX_HDR_CONN_KAL; |
| if ((to_del & 2) && buf) |
| http_remove_header2(msg, buf, &txn->hdr_idx, &ctx); |
| else |
| txn->flags |= TX_CON_KAL_SET; |
| } |
| else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) { |
| txn->flags |= TX_HDR_CONN_CLO; |
| if ((to_del & 1) && buf) |
| http_remove_header2(msg, buf, &txn->hdr_idx, &ctx); |
| else |
| txn->flags |= TX_CON_CLO_SET; |
| } |
| } |
| |
| txn->flags |= TX_HDR_CONN_PRS; |
| return; |
| } |
| |
| /* Apply desired changes on the Connection: header. Values may be removed and/or |
| * added depending on the <wanted> flags, which are exclusively composed of |
| * TX_CON_CLO_SET and TX_CON_KAL_SET, depending on what flags are desired. The |
| * TX_CON_*_SET flags are adjusted in txn->flags depending on what is left. |
| */ |
| void http_change_connection_header(struct http_txn *txn, struct http_msg *msg, struct buffer *buf, int wanted) |
| { |
| struct hdr_ctx ctx; |
| const char *hdr_val = "Connection"; |
| int hdr_len = 10; |
| |
| ctx.idx = 0; |
| |
| |
| if (unlikely(txn->flags & TX_USE_PX_CONN)) { |
| hdr_val = "Proxy-Connection"; |
| hdr_len = 16; |
| } |
| |
| txn->flags &= ~(TX_CON_CLO_SET | TX_CON_KAL_SET); |
| while (http_find_header2(hdr_val, hdr_len, msg->sol, &txn->hdr_idx, &ctx)) { |
| if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) { |
| if (wanted & TX_CON_KAL_SET) |
| txn->flags |= TX_CON_KAL_SET; |
| else |
| http_remove_header2(msg, buf, &txn->hdr_idx, &ctx); |
| } |
| else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) { |
| if (wanted & TX_CON_CLO_SET) |
| txn->flags |= TX_CON_CLO_SET; |
| else |
| http_remove_header2(msg, buf, &txn->hdr_idx, &ctx); |
| } |
| } |
| |
| if (wanted == (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET))) |
| return; |
| |
| if ((wanted & TX_CON_CLO_SET) && !(txn->flags & TX_CON_CLO_SET)) { |
| txn->flags |= TX_CON_CLO_SET; |
| hdr_val = "Connection: close"; |
| hdr_len = 17; |
| if (unlikely(txn->flags & TX_USE_PX_CONN)) { |
| hdr_val = "Proxy-Connection: close"; |
| hdr_len = 23; |
| } |
| http_header_add_tail2(buf, msg, &txn->hdr_idx, hdr_val, hdr_len); |
| } |
| |
| if ((wanted & TX_CON_KAL_SET) && !(txn->flags & TX_CON_KAL_SET)) { |
| txn->flags |= TX_CON_KAL_SET; |
| hdr_val = "Connection: keep-alive"; |
| hdr_len = 22; |
| if (unlikely(txn->flags & TX_USE_PX_CONN)) { |
| hdr_val = "Proxy-Connection: keep-alive"; |
| hdr_len = 28; |
| } |
| http_header_add_tail2(buf, msg, &txn->hdr_idx, hdr_val, hdr_len); |
| } |
| return; |
| } |
| |
| /* Parse the chunk size at buf->lr. Once done, it adjusts ->lr to point to the |
| * first byte of body, and increments msg->sov by the number of bytes parsed, |
| * so that we know we can forward between ->som and ->sov. Note that due to |
| * possible wrapping at the end of the buffer, it is possible that msg->sov is |
| * lower than msg->som. |
| * Return >0 on success, 0 when some data is missing, <0 on error. |
| * Note: this function is designed to parse wrapped CRLF at the end of the buffer. |
| */ |
| int http_parse_chunk_size(struct buffer *buf, struct http_msg *msg) |
| { |
| char *ptr = buf->lr; |
| char *end = buf->data + buf->size; |
| unsigned int chunk = 0; |
| |
| /* The chunk size is in the following form, though we are only |
| * interested in the size and CRLF : |
| * 1*HEXDIGIT *WSP *[ ';' extensions ] CRLF |
| */ |
| while (1) { |
| int c; |
| if (ptr == buf->r) |
| return 0; |
| c = hex2i(*ptr); |
| if (c < 0) /* not a hex digit anymore */ |
| break; |
| if (++ptr >= end) |
| ptr = buf->data; |
| if (chunk & 0xF000000) /* overflow will occur */ |
| goto error; |
| chunk = (chunk << 4) + c; |
| } |
| |
| /* empty size not allowed */ |
| if (ptr == buf->lr) |
| goto error; |
| |
| while (http_is_spht[(unsigned char)*ptr]) { |
| if (++ptr >= end) |
| ptr = buf->data; |
| if (ptr == buf->r) |
| return 0; |
| } |
| |
| /* Up to there, we know that at least one byte is present at *ptr. Check |
| * for the end of chunk size. |
| */ |
| while (1) { |
| if (likely(HTTP_IS_CRLF(*ptr))) { |
| /* we now have a CR or an LF at ptr */ |
| if (likely(*ptr == '\r')) { |
| if (++ptr >= end) |
| ptr = buf->data; |
| if (ptr == buf->r) |
| return 0; |
| } |
| |
| if (*ptr != '\n') |
| goto error; |
| if (++ptr >= end) |
| ptr = buf->data; |
| /* done */ |
| break; |
| } |
| else if (*ptr == ';') { |
| /* chunk extension, ends at next CRLF */ |
| if (++ptr >= end) |
| ptr = buf->data; |
| if (ptr == buf->r) |
| return 0; |
| |
| while (!HTTP_IS_CRLF(*ptr)) { |
| if (++ptr >= end) |
| ptr = buf->data; |
| if (ptr == buf->r) |
| return 0; |
| } |
| /* we have a CRLF now, loop above */ |
| continue; |
| } |
| else |
| goto error; |
| } |
| |
| /* OK we found our CRLF and now <ptr> points to the next byte, |
| * which may or may not be present. We save that into ->lr and |
| * ->sov. |
| */ |
| msg->sov += ptr - buf->lr; |
| buf->lr = ptr; |
| msg->hdr_content_len = chunk; |
| msg->msg_state = chunk ? HTTP_MSG_DATA : HTTP_MSG_TRAILERS; |
| return 1; |
| error: |
| msg->err_pos = ptr - buf->data; |
| return -1; |
| } |
| |
| /* This function skips trailers in the buffer <buf> associated with HTTP |
| * message <msg>. The first visited position is buf->lr. If the end of |
| * the trailers is found, it is automatically scheduled to be forwarded, |
| * msg->msg_state switches to HTTP_MSG_DONE, and the function returns >0. |
| * If not enough data are available, the function does not change anything |
| * except maybe buf->lr and msg->sov if it could parse some lines, and returns |
| * zero. If a parse error is encountered, the function returns < 0 and does not |
| * change anything except maybe buf->lr and msg->sov. Note that the message |
| * must already be in HTTP_MSG_TRAILERS state before calling this function, |
| * which implies that all non-trailers data have already been scheduled for |
| * forwarding, and that the difference between msg->som and msg->sov exactly |
| * matches the length of trailers already parsed and not forwarded. It is also |
| * important to note that this function is designed to be able to parse wrapped |
| * headers at end of buffer. |
| */ |
| int http_forward_trailers(struct buffer *buf, struct http_msg *msg) |
| { |
| /* we have buf->lr which points to next line. Look for CRLF. */ |
| while (1) { |
| char *p1 = NULL, *p2 = NULL; |
| char *ptr = buf->lr; |
| int bytes; |
| |
| /* scan current line and stop at LF or CRLF */ |
| while (1) { |
| if (ptr == buf->r) |
| return 0; |
| |
| if (*ptr == '\n') { |
| if (!p1) |
| p1 = ptr; |
| p2 = ptr; |
| break; |
| } |
| |
| if (*ptr == '\r') { |
| if (p1) { |
| msg->err_pos = ptr - buf->data; |
| return -1; |
| } |
| p1 = ptr; |
| } |
| |
| ptr++; |
| if (ptr >= buf->data + buf->size) |
| ptr = buf->data; |
| } |
| |
| /* after LF; point to beginning of next line */ |
| p2++; |
| if (p2 >= buf->data + buf->size) |
| p2 = buf->data; |
| |
| bytes = p2 - buf->lr; |
| if (bytes < 0) |
| bytes += buf->size; |
| |
| /* schedule this line for forwarding */ |
| msg->sov += bytes; |
| if (msg->sov >= buf->size) |
| msg->sov -= buf->size; |
| |
| if (p1 == buf->lr) { |
| /* LF/CRLF at beginning of line => end of trailers at p2. |
| * Everything was scheduled for forwarding, there's nothing |
| * left from this message. |
| */ |
| buf->lr = p2; |
| msg->msg_state = HTTP_MSG_DONE; |
| return 1; |
| } |
| /* OK, next line then */ |
| buf->lr = p2; |
| } |
| } |
| |
| /* This function may be called only in HTTP_MSG_DATA_CRLF. It reads the CRLF or |
| * a possible LF alone at the end of a chunk. It automatically adjusts msg->sov, |
| * ->som, buf->lr in order to include this part into the next forwarding phase. |
| * It also sets msg_state to HTTP_MSG_CHUNK_SIZE and returns >0 on success. If |
| * not enough data are available, the function does not change anything and |
| * returns zero. If a parse error is encountered, the function returns < 0 and |
| * does not change anything. Note: this function is designed to parse wrapped |
| * CRLF at the end of the buffer. |
| */ |
| int http_skip_chunk_crlf(struct buffer *buf, struct http_msg *msg) |
| { |
| char *ptr; |
| int bytes; |
| |
| /* NB: we'll check data availabilty at the end. It's not a |
| * problem because whatever we match first will be checked |
| * against the correct length. |
| */ |
| bytes = 1; |
| ptr = buf->lr; |
| if (*ptr == '\r') { |
| bytes++; |
| ptr++; |
| if (ptr >= buf->data + buf->size) |
| ptr = buf->data; |
| } |
| |
| if (bytes > buf->l - buf->send_max) |
| return 0; |
| |
| if (*ptr != '\n') { |
| msg->err_pos = ptr - buf->data; |
| return -1; |
| } |
| |
| ptr++; |
| if (ptr >= buf->data + buf->size) |
| ptr = buf->data; |
| buf->lr = ptr; |
| /* prepare the CRLF to be forwarded. msg->som may be before data but we don't care */ |
| msg->sov = ptr - buf->data; |
| msg->som = msg->sov - bytes; |
| msg->msg_state = HTTP_MSG_CHUNK_SIZE; |
| return 1; |
| } |
| |
| void http_buffer_heavy_realign(struct buffer *buf, struct http_msg *msg) |
| { |
| char *end = buf->data + buf->size; |
| int off = buf->data + buf->size - buf->w; |
| |
| /* two possible cases : |
| * - the buffer is in one contiguous block, we move it in-place |
| * - the buffer is in two blocks, we move it via the swap_buffer |
| */ |
| if (buf->l) { |
| int block1 = buf->l; |
| int block2 = 0; |
| if (buf->r <= buf->w) { |
| /* non-contiguous block */ |
| block1 = buf->data + buf->size - buf->w; |
| block2 = buf->r - buf->data; |
| } |
| if (block2) |
| memcpy(swap_buffer, buf->data, block2); |
| memmove(buf->data, buf->w, block1); |
| if (block2) |
| memcpy(buf->data + block1, swap_buffer, block2); |
| } |
| |
| /* adjust all known pointers */ |
| buf->w = buf->data; |
| buf->lr += off; if (buf->lr >= end) buf->lr -= buf->size; |
| buf->r += off; if (buf->r >= end) buf->r -= buf->size; |
| msg->sol += off; if (msg->sol >= end) msg->sol -= buf->size; |
| msg->eol += off; if (msg->eol >= end) msg->eol -= buf->size; |
| |
| /* adjust relative pointers */ |
| msg->som = 0; |
| msg->eoh += off; if (msg->eoh >= buf->size) msg->eoh -= buf->size; |
| msg->col += off; if (msg->col >= buf->size) msg->col -= buf->size; |
| msg->sov += off; if (msg->sov >= buf->size) msg->sov -= buf->size; |
| |
| if (msg->err_pos >= 0) { |
| msg->err_pos += off; |
| if (msg->err_pos >= buf->size) |
| msg->err_pos -= buf->size; |
| } |
| |
| buf->flags &= ~BF_FULL; |
| if (buf->l >= buffer_max_len(buf)) |
| buf->flags |= BF_FULL; |
| } |
| |
| /* This stream analyser waits for a complete HTTP request. It returns 1 if the |
| * processing can continue on next analysers, or zero if it either needs more |
| * data or wants to immediately abort the request (eg: timeout, error, ...). It |
| * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req->analysers |
| * when it has nothing left to do, and may remove any analyser when it wants to |
| * abort. |
| */ |
| int http_wait_for_request(struct session *s, struct buffer *req, int an_bit) |
| { |
| /* |
| * We will parse the partial (or complete) lines. |
| * We will check the request syntax, and also join multi-line |
| * headers. An index of all the lines will be elaborated while |
| * parsing. |
| * |
| * For the parsing, we use a 28 states FSM. |
| * |
| * Here is the information we currently have : |
| * req->data + msg->som = beginning of request |
| * req->data + msg->eoh = end of processed headers / start of current one |
| * msg->eol = end of current header or line (LF or CRLF) |
| * req->lr = first non-visited byte |
| * req->r = end of data |
| * |
| * At end of parsing, we may perform a capture of the error (if any), and |
| * we will set a few fields (msg->sol, txn->meth, sn->flags/SN_REDIRECTABLE). |
| * We also check for monitor-uri, logging, HTTP/0.9 to 1.0 conversion, and |
| * finally headers capture. |
| */ |
| |
| int cur_idx; |
| int use_close_only; |
| struct http_txn *txn = &s->txn; |
| struct http_msg *msg = &txn->req; |
| struct hdr_ctx ctx; |
| |
| DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| req, |
| req->rex, req->wex, |
| req->flags, |
| req->l, |
| req->analysers); |
| |
| /* we're speaking HTTP here, so let's speak HTTP to the client */ |
| s->srv_error = http_return_srv_error; |
| |
| /* There's a protected area at the end of the buffer for rewriting |
| * purposes. We don't want to start to parse the request if the |
| * protected area is affected, because we may have to move processed |
| * data later, which is much more complicated. |
| */ |
| if (req->l && msg->msg_state < HTTP_MSG_ERROR) { |
| if ((txn->flags & TX_NOT_FIRST) && |
| unlikely((req->flags & BF_FULL) || |
| req->r < req->lr || |
| req->r > req->data + req->size - global.tune.maxrewrite)) { |
| if (req->send_max) { |
| if (req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) |
| goto failed_keep_alive; |
| /* some data has still not left the buffer, wake us once that's done */ |
| buffer_dont_connect(req); |
| req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */ |
| return 0; |
| } |
| if (req->r < req->lr || req->r > req->data + req->size - global.tune.maxrewrite) |
| http_buffer_heavy_realign(req, msg); |
| } |
| |
| /* Note that we have the same problem with the response ; we |
| * may want to send a redirect, error or anything which requires |
| * some spare space. So we'll ensure that we have at least |
| * maxrewrite bytes available in the response buffer before |
| * processing that one. This will only affect pipelined |
| * keep-alive requests. |
| */ |
| if ((txn->flags & TX_NOT_FIRST) && |
| unlikely((s->rep->flags & BF_FULL) || |
| s->rep->r < s->rep->lr || |
| s->rep->r > s->rep->data + s->rep->size - global.tune.maxrewrite)) { |
| if (s->rep->send_max) { |
| if (s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) |
| goto failed_keep_alive; |
| /* don't let a connection request be initiated */ |
| buffer_dont_connect(req); |
| s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */ |
| s->rep->analysers |= an_bit; /* wake us up once it changes */ |
| return 0; |
| } |
| } |
| |
| if (likely(req->lr < req->r)) |
| http_msg_analyzer(req, msg, &txn->hdr_idx); |
| } |
| |
| /* 1: we might have to print this header in debug mode */ |
| if (unlikely((global.mode & MODE_DEBUG) && |
| (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) && |
| msg->sol && |
| (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) { |
| char *eol, *sol; |
| |
| sol = req->data + msg->som; |
| eol = sol + msg->sl.rq.l; |
| debug_hdr("clireq", s, sol, eol); |
| |
| sol += hdr_idx_first_pos(&txn->hdr_idx); |
| cur_idx = hdr_idx_first_idx(&txn->hdr_idx); |
| |
| while (cur_idx) { |
| eol = sol + txn->hdr_idx.v[cur_idx].len; |
| debug_hdr("clihdr", s, sol, eol); |
| sol = eol + txn->hdr_idx.v[cur_idx].cr + 1; |
| cur_idx = txn->hdr_idx.v[cur_idx].next; |
| } |
| } |
| |
| |
| /* |
| * Now we quickly check if we have found a full valid request. |
| * If not so, we check the FD and buffer states before leaving. |
| * A full request is indicated by the fact that we have seen |
| * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid |
| * requests are checked first. When waiting for a second request |
| * on a keep-alive session, if we encounter and error, close, t/o, |
| * we note the error in the session flags but don't set any state. |
| * Since the error will be noted there, it will not be counted by |
| * process_session() as a frontend error. |
| * Last, we may increase some tracked counters' http request errors on |
| * the cases that are deliberately the client's fault. For instance, |
| * a timeout or connection reset is not counted as an error. However |
| * a bad request is. |
| */ |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) { |
| /* |
| * First, let's catch bad requests. |
| */ |
| if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) { |
| session_inc_http_req_ctr(s); |
| session_inc_http_err_ctr(s); |
| proxy_inc_fe_req_ctr(s->fe); |
| goto return_bad_req; |
| } |
| |
| /* 1: Since we are in header mode, if there's no space |
| * left for headers, we won't be able to free more |
| * later, so the session will never terminate. We |
| * must terminate it now. |
| */ |
| if (unlikely(req->flags & BF_FULL)) { |
| /* FIXME: check if URI is set and return Status |
| * 414 Request URI too long instead. |
| */ |
| session_inc_http_req_ctr(s); |
| session_inc_http_err_ctr(s); |
| proxy_inc_fe_req_ctr(s->fe); |
| goto return_bad_req; |
| } |
| |
| /* 2: have we encountered a read error ? */ |
| else if (req->flags & BF_READ_ERROR) { |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_CLICL; |
| |
| if (txn->flags & TX_WAIT_NEXT_RQ) |
| goto failed_keep_alive; |
| |
| /* we cannot return any message on error */ |
| if (msg->err_pos >= 0) { |
| http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe); |
| session_inc_http_err_ctr(s); |
| } |
| |
| msg->msg_state = HTTP_MSG_ERROR; |
| req->analysers = 0; |
| |
| session_inc_http_req_ctr(s); |
| proxy_inc_fe_req_ctr(s->fe); |
| s->fe->counters.failed_req++; |
| if (s->listener->counters) |
| s->listener->counters->failed_req++; |
| |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_R; |
| return 0; |
| } |
| |
| /* 3: has the read timeout expired ? */ |
| else if (req->flags & BF_READ_TIMEOUT || tick_is_expired(req->analyse_exp, now_ms)) { |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_CLITO; |
| |
| if (txn->flags & TX_WAIT_NEXT_RQ) |
| goto failed_keep_alive; |
| |
| /* read timeout : give up with an error message. */ |
| if (msg->err_pos >= 0) { |
| http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe); |
| session_inc_http_err_ctr(s); |
| } |
| txn->status = 408; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408)); |
| msg->msg_state = HTTP_MSG_ERROR; |
| req->analysers = 0; |
| |
| session_inc_http_req_ctr(s); |
| proxy_inc_fe_req_ctr(s->fe); |
| s->fe->counters.failed_req++; |
| if (s->listener->counters) |
| s->listener->counters->failed_req++; |
| |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_R; |
| return 0; |
| } |
| |
| /* 4: have we encountered a close ? */ |
| else if (req->flags & BF_SHUTR) { |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_CLICL; |
| |
| if (txn->flags & TX_WAIT_NEXT_RQ) |
| goto failed_keep_alive; |
| |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe); |
| txn->status = 400; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400)); |
| msg->msg_state = HTTP_MSG_ERROR; |
| req->analysers = 0; |
| |
| session_inc_http_err_ctr(s); |
| session_inc_http_req_ctr(s); |
| proxy_inc_fe_req_ctr(s->fe); |
| s->fe->counters.failed_req++; |
| if (s->listener->counters) |
| s->listener->counters->failed_req++; |
| |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_R; |
| return 0; |
| } |
| |
| buffer_dont_connect(req); |
| req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */ |
| s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */ |
| |
| if ((msg->msg_state != HTTP_MSG_RQBEFORE) && (txn->flags & TX_WAIT_NEXT_RQ)) { |
| /* If the client starts to talk, let's fall back to |
| * request timeout processing. |
| */ |
| txn->flags &= ~TX_WAIT_NEXT_RQ; |
| req->analyse_exp = TICK_ETERNITY; |
| } |
| |
| /* just set the request timeout once at the beginning of the request */ |
| if (!tick_isset(req->analyse_exp)) { |
| if ((msg->msg_state == HTTP_MSG_RQBEFORE) && |
| (txn->flags & TX_WAIT_NEXT_RQ) && |
| tick_isset(s->be->timeout.httpka)) |
| req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka); |
| else |
| req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq); |
| } |
| |
| /* we're not ready yet */ |
| return 0; |
| |
| failed_keep_alive: |
| /* Here we process low-level errors for keep-alive requests. In |
| * short, if the request is not the first one and it experiences |
| * a timeout, read error or shutdown, we just silently close so |
| * that the client can try again. |
| */ |
| txn->status = 0; |
| msg->msg_state = HTTP_MSG_RQBEFORE; |
| req->analysers = 0; |
| s->logs.logwait = 0; |
| s->rep->flags &= ~BF_EXPECT_MORE; /* speed up sending a previous response */ |
| stream_int_retnclose(req->prod, NULL); |
| return 0; |
| } |
| |
| /* OK now we have a complete HTTP request with indexed headers. Let's |
| * complete the request parsing by setting a few fields we will need |
| * later. At this point, we have the last CRLF at req->data + msg->eoh. |
| * If the request is in HTTP/0.9 form, the rule is still true, and eoh |
| * points to the CRLF of the request line. req->lr points to the first |
| * byte after the last LF. msg->col and msg->sov point to the first |
| * byte of data. msg->eol cannot be trusted because it may have been |
| * left uninitialized (for instance in the absence of headers). |
| */ |
| |
| session_inc_http_req_ctr(s); |
| proxy_inc_fe_req_ctr(s->fe); /* one more valid request for this FE */ |
| |
| if (txn->flags & TX_WAIT_NEXT_RQ) { |
| /* kill the pending keep-alive timeout */ |
| txn->flags &= ~TX_WAIT_NEXT_RQ; |
| req->analyse_exp = TICK_ETERNITY; |
| } |
| |
| |
| /* Maybe we found in invalid header name while we were configured not |
| * to block on that, so we have to capture it now. |
| */ |
| if (unlikely(msg->err_pos >= 0)) |
| http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe); |
| |
| /* |
| * 1: identify the method |
| */ |
| txn->meth = find_http_meth(msg->sol, msg->sl.rq.m_l); |
| |
| /* we can make use of server redirect on GET and HEAD */ |
| if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD) |
| s->flags |= SN_REDIRECTABLE; |
| |
| /* |
| * 2: check if the URI matches the monitor_uri. |
| * We have to do this for every request which gets in, because |
| * the monitor-uri is defined by the frontend. |
| */ |
| if (unlikely((s->fe->monitor_uri_len != 0) && |
| (s->fe->monitor_uri_len == msg->sl.rq.u_l) && |
| !memcmp(msg->sol + msg->sl.rq.u, |
| s->fe->monitor_uri, |
| s->fe->monitor_uri_len))) { |
| /* |
| * We have found the monitor URI |
| */ |
| struct acl_cond *cond; |
| |
| s->flags |= SN_MONITOR; |
| |
| /* Check if we want to fail this monitor request or not */ |
| list_for_each_entry(cond, &s->fe->mon_fail_cond, list) { |
| int ret = acl_exec_cond(cond, s->fe, s, txn, ACL_DIR_REQ); |
| |
| ret = acl_pass(ret); |
| if (cond->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| |
| if (ret) { |
| /* we fail this request, let's return 503 service unavail */ |
| txn->status = 503; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_503)); |
| goto return_prx_cond; |
| } |
| } |
| |
| /* nothing to fail, let's reply normaly */ |
| txn->status = 200; |
| stream_int_retnclose(req->prod, &http_200_chunk); |
| goto return_prx_cond; |
| } |
| |
| /* |
| * 3: Maybe we have to copy the original REQURI for the logs ? |
| * Note: we cannot log anymore if the request has been |
| * classified as invalid. |
| */ |
| if (unlikely(s->logs.logwait & LW_REQ)) { |
| /* we have a complete HTTP request that we must log */ |
| if ((txn->uri = pool_alloc2(pool2_requri)) != NULL) { |
| int urilen = msg->sl.rq.l; |
| |
| if (urilen >= REQURI_LEN) |
| urilen = REQURI_LEN - 1; |
| memcpy(txn->uri, &req->data[msg->som], urilen); |
| txn->uri[urilen] = 0; |
| |
| if (!(s->logs.logwait &= ~LW_REQ)) |
| s->do_log(s); |
| } else { |
| Alert("HTTP logging : out of memory.\n"); |
| } |
| } |
| |
| /* 4. We may have to convert HTTP/0.9 requests to HTTP/1.0 */ |
| if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn)) |
| goto return_bad_req; |
| |
| /* ... and check if the request is HTTP/1.1 or above */ |
| if ((msg->sl.rq.v_l == 8) && |
| ((msg->sol[msg->sl.rq.v + 5] > '1') || |
| ((msg->sol[msg->sl.rq.v + 5] == '1') && |
| (msg->sol[msg->sl.rq.v + 7] >= '1')))) |
| txn->flags |= TX_REQ_VER_11; |
| |
| /* "connection" has not been parsed yet */ |
| txn->flags &= ~(TX_HDR_CONN_PRS | TX_HDR_CONN_CLO | TX_HDR_CONN_KAL); |
| |
| /* if the frontend has "option http-use-proxy-header", we'll check if |
| * we have what looks like a proxied connection instead of a connection, |
| * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection. |
| * Note that this is *not* RFC-compliant, however browsers and proxies |
| * happen to do that despite being non-standard :-( |
| * We consider that a request not beginning with either '/' or '*' is |
| * a proxied connection, which covers both "scheme://location" and |
| * CONNECT ip:port. |
| */ |
| if ((s->fe->options2 & PR_O2_USE_PXHDR) && |
| msg->sol[msg->sl.rq.u] != '/' && msg->sol[msg->sl.rq.u] != '*') |
| txn->flags |= TX_USE_PX_CONN; |
| |
| /* transfer length unknown*/ |
| txn->flags &= ~TX_REQ_XFER_LEN; |
| |
| /* 5: we may need to capture headers */ |
| if (unlikely((s->logs.logwait & LW_REQHDR) && s->fe->req_cap)) |
| capture_headers(msg->sol, &txn->hdr_idx, |
| txn->req.cap, s->fe->req_cap); |
| |
| /* 6: determine the transfer-length. |
| * According to RFC2616 #4.4, amended by the HTTPbis working group, |
| * the presence of a message-body in a REQUEST and its transfer length |
| * must be determined that way (in order of precedence) : |
| * 1. The presence of a message-body in a request is signaled by the |
| * inclusion of a Content-Length or Transfer-Encoding header field |
| * in the request's header fields. When a request message contains |
| * both a message-body of non-zero length and a method that does |
| * not define any semantics for that request message-body, then an |
| * origin server SHOULD either ignore the message-body or respond |
| * with an appropriate error message (e.g., 413). A proxy or |
| * gateway, when presented the same request, SHOULD either forward |
| * the request inbound with the message- body or ignore the |
| * message-body when determining a response. |
| * |
| * 2. If a Transfer-Encoding header field (Section 9.7) is present |
| * and the "chunked" transfer-coding (Section 6.2) is used, the |
| * transfer-length is defined by the use of this transfer-coding. |
| * If a Transfer-Encoding header field is present and the "chunked" |
| * transfer-coding is not present, the transfer-length is defined |
| * by the sender closing the connection. |
| * |
| * 3. If a Content-Length header field is present, its decimal value in |
| * OCTETs represents both the entity-length and the transfer-length. |
| * If a message is received with both a Transfer-Encoding header |
| * field and a Content-Length header field, the latter MUST be ignored. |
| * |
| * 4. By the server closing the connection. (Closing the connection |
| * cannot be used to indicate the end of a request body, since that |
| * would leave no possibility for the server to send back a response.) |
| * |
| * Whenever a transfer-coding is applied to a message-body, the set of |
| * transfer-codings MUST include "chunked", unless the message indicates |
| * it is terminated by closing the connection. When the "chunked" |
| * transfer-coding is used, it MUST be the last transfer-coding applied |
| * to the message-body. |
| */ |
| |
| use_close_only = 0; |
| ctx.idx = 0; |
| /* set TE_CHNK and XFER_LEN only if "chunked" is seen last */ |
| while ((txn->flags & TX_REQ_VER_11) && |
| http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) { |
| if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0) |
| txn->flags |= (TX_REQ_TE_CHNK | TX_REQ_XFER_LEN); |
| else if (txn->flags & TX_REQ_TE_CHNK) { |
| /* bad transfer-encoding (chunked followed by something else) */ |
| use_close_only = 1; |
| txn->flags &= ~(TX_REQ_TE_CHNK | TX_REQ_XFER_LEN); |
| break; |
| } |
| } |
| |
| ctx.idx = 0; |
| while (!(txn->flags & TX_REQ_TE_CHNK) && !use_close_only && |
| http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) { |
| signed long long cl; |
| |
| if (!ctx.vlen) |
| goto return_bad_req; |
| |
| if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl)) |
| goto return_bad_req; /* parse failure */ |
| |
| if (cl < 0) |
| goto return_bad_req; |
| |
| if ((txn->flags & TX_REQ_CNT_LEN) && (msg->hdr_content_len != cl)) |
| goto return_bad_req; /* already specified, was different */ |
| |
| txn->flags |= TX_REQ_CNT_LEN | TX_REQ_XFER_LEN; |
| msg->hdr_content_len = cl; |
| } |
| |
| /* bodyless requests have a known length */ |
| if (!use_close_only) |
| txn->flags |= TX_REQ_XFER_LEN; |
| |
| /* end of job, return OK */ |
| req->analysers &= ~an_bit; |
| req->analyse_exp = TICK_ETERNITY; |
| return 1; |
| |
| return_bad_req: |
| /* We centralize bad requests processing here */ |
| if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) { |
| /* we detected a parsing error. We want to archive this request |
| * in the dedicated proxy area for later troubleshooting. |
| */ |
| http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe); |
| } |
| |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| txn->status = 400; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400)); |
| |
| s->fe->counters.failed_req++; |
| if (s->listener->counters) |
| s->listener->counters->failed_req++; |
| |
| return_prx_cond: |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_PRXCOND; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_R; |
| |
| req->analysers = 0; |
| req->analyse_exp = TICK_ETERNITY; |
| return 0; |
| } |
| |
| /* We reached the stats page through a POST request. |
| * Parse the posted data and enable/disable servers if necessary. |
| * Returns 0 if request was parsed. |
| * Returns 1 if there was a problem parsing the posted data. |
| */ |
| int http_process_req_stat_post(struct session *s, struct buffer *req) |
| { |
| struct http_txn *txn = &s->txn; |
| struct proxy *px; |
| struct server *sv; |
| |
| char *backend = NULL; |
| int action = 0; |
| |
| char *first_param, *cur_param, *next_param, *end_params; |
| |
| first_param = req->data + txn->req.eoh + 2; |
| end_params = first_param + txn->req.hdr_content_len; |
| |
| cur_param = next_param = end_params; |
| |
| if (end_params >= req->data + req->size) { |
| /* Prevent buffer overflow */ |
| s->data_ctx.stats.st_code = STAT_STATUS_EXCD; |
| return 1; |
| } |
| else if (end_params > req->data + req->l) { |
| /* This condition also rejects a request with Expect: 100-continue */ |
| s->data_ctx.stats.st_code = STAT_STATUS_EXCD; |
| return 1; |
| } |
| |
| *end_params = '\0'; |
| |
| s->data_ctx.stats.st_code = STAT_STATUS_NONE; |
| |
| /* |
| * Parse the parameters in reverse order to only store the last value. |
| * From the html form, the backend and the action are at the end. |
| */ |
| while (cur_param > first_param) { |
| char *key, *value; |
| |
| cur_param--; |
| if ((*cur_param == '&') || (cur_param == first_param)) { |
| /* Parse the key */ |
| key = cur_param; |
| if (cur_param != first_param) { |
| /* delimit the string for the next loop */ |
| *key++ = '\0'; |
| } |
| |
| /* Parse the value */ |
| value = key; |
| while (*value != '\0' && *value != '=') { |
| value++; |
| } |
| if (*value == '=') { |
| /* Ok, a value is found, we can mark the end of the key */ |
| *value++ = '\0'; |
| } |
| |
| /* Now we can check the key to see what to do */ |
| if (!backend && strcmp(key, "b") == 0) { |
| backend = value; |
| } |
| else if (!action && strcmp(key, "action") == 0) { |
| if (strcmp(value, "disable") == 0) { |
| action = 1; |
| } |
| else if (strcmp(value, "enable") == 0) { |
| action = 2; |
| } else { |
| /* unknown action, no need to continue */ |
| break; |
| } |
| } |
| else if (strcmp(key, "s") == 0) { |
| if (backend && action && get_backend_server(backend, value, &px, &sv)) { |
| switch (action) { |
| case 1: |
| if (! (sv->state & SRV_MAINTAIN)) { |
| /* Not already in maintenance, we can change the server state */ |
| sv->state |= SRV_MAINTAIN; |
| set_server_down(sv); |
| s->data_ctx.stats.st_code = STAT_STATUS_DONE; |
| } |
| break; |
| case 2: |
| if ((sv->state & SRV_MAINTAIN)) { |
| /* Already in maintenance, we can change the server state */ |
| set_server_up(sv); |
| sv->health = sv->rise; /* up, but will fall down at first failure */ |
| s->data_ctx.stats.st_code = STAT_STATUS_DONE; |
| } |
| break; |
| } |
| } |
| } |
| next_param = cur_param; |
| } |
| } |
| return 0; |
| } |
| |
| /* This stream analyser runs all HTTP request processing which is common to |
| * frontends and backends, which means blocking ACLs, filters, connection-close, |
| * reqadd, stats and redirects. This is performed for the designated proxy. |
| * It returns 1 if the processing can continue on next analysers, or zero if it |
| * either needs more data or wants to immediately abort the request (eg: deny, |
| * error, ...). |
| */ |
| int http_process_req_common(struct session *s, struct buffer *req, int an_bit, struct proxy *px) |
| { |
| struct http_txn *txn = &s->txn; |
| struct http_msg *msg = &txn->req; |
| struct acl_cond *cond; |
| struct req_acl_rule *req_acl, *req_acl_final = NULL; |
| struct redirect_rule *rule; |
| struct cond_wordlist *wl; |
| int del_ka, del_cl, do_stats; |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) { |
| /* we need more data */ |
| buffer_dont_connect(req); |
| return 0; |
| } |
| |
| req->analysers &= ~an_bit; |
| req->analyse_exp = TICK_ETERNITY; |
| |
| DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| req, |
| req->rex, req->wex, |
| req->flags, |
| req->l, |
| req->analysers); |
| |
| /* first check whether we have some ACLs set to block this request */ |
| list_for_each_entry(cond, &px->block_cond, list) { |
| int ret = acl_exec_cond(cond, px, s, txn, ACL_DIR_REQ); |
| |
| ret = acl_pass(ret); |
| if (cond->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| |
| if (ret) { |
| txn->status = 403; |
| /* let's log the request time */ |
| s->logs.tv_request = now; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403)); |
| session_inc_http_err_ctr(s); |
| goto return_prx_cond; |
| } |
| } |
| |
| do_stats = stats_check_uri(s, px); |
| |
| list_for_each_entry(req_acl, (do_stats?&px->uri_auth->req_acl:&px->req_acl), list) { |
| int ret = 1; |
| |
| if (req_acl->action >= PR_REQ_ACL_ACT_MAX) |
| continue; |
| |
| /* check condition, but only if attached */ |
| if (req_acl->cond) { |
| ret = acl_exec_cond(req_acl->cond, px, s, txn, ACL_DIR_REQ); |
| ret = acl_pass(ret); |
| |
| if (req_acl->cond->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| } |
| |
| if (ret) { |
| req_acl_final = req_acl; |
| break; |
| } |
| } |
| |
| if (req_acl_final && req_acl_final->action == PR_REQ_ACL_ACT_DENY) { |
| txn->status = 403; |
| s->logs.tv_request = now; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403)); |
| session_inc_http_err_ctr(s); |
| goto return_prx_cond; |
| } |
| |
| /* try headers filters */ |
| if (px->req_exp != NULL) { |
| if (apply_filters_to_request(s, req, px) < 0) |
| goto return_bad_req; |
| |
| /* has the request been denied ? */ |
| if (txn->flags & TX_CLDENY) { |
| /* no need to go further */ |
| txn->status = 403; |
| /* let's log the request time */ |
| s->logs.tv_request = now; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403)); |
| session_inc_http_err_ctr(s); |
| goto return_prx_cond; |
| } |
| |
| /* When a connection is tarpitted, we use the tarpit timeout, |
| * which may be the same as the connect timeout if unspecified. |
| * If unset, then set it to zero because we really want it to |
| * eventually expire. We build the tarpit as an analyser. |
| */ |
| if (txn->flags & TX_CLTARPIT) { |
| buffer_erase(s->req); |
| /* wipe the request out so that we can drop the connection early |
| * if the client closes first. |
| */ |
| buffer_dont_connect(req); |
| req->analysers = 0; /* remove switching rules etc... */ |
| req->analysers |= AN_REQ_HTTP_TARPIT; |
| req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit); |
| if (!req->analyse_exp) |
| req->analyse_exp = tick_add(now_ms, 0); |
| session_inc_http_err_ctr(s); |
| return 1; |
| } |
| } |
| |
| /* Until set to anything else, the connection mode is set as TUNNEL. It will |
| * only change if both the request and the config reference something else. |
| * Option httpclose by itself does not set a mode, it remains a tunnel mode |
| * in which headers are mangled. However, if another mode is set, it will |
| * affect it (eg: server-close/keep-alive + httpclose = close). Note that we |
| * avoid to redo the same work if FE and BE have the same settings (common). |
| * The method consists in checking if options changed between the two calls |
| * (implying that either one is non-null, or one of them is non-null and we |
| * are there for the first time. |
| */ |
| |
| del_cl = del_ka = 0; |
| |
| if ((!(txn->flags & TX_HDR_CONN_PRS) && |
| (s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))) || |
| ((s->fe->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) != |
| (s->be->options & (PR_O_KEEPALIVE|PR_O_SERVER_CLO|PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)))) { |
| int tmp = TX_CON_WANT_TUN; |
| |
| if ((s->fe->options|s->be->options) & PR_O_KEEPALIVE || |
| ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)) |
| tmp = TX_CON_WANT_KAL; |
| if ((s->fe->options|s->be->options) & PR_O_SERVER_CLO) |
| tmp = TX_CON_WANT_SCL; |
| if ((s->fe->options|s->be->options) & PR_O_FORCE_CLO) |
| tmp = TX_CON_WANT_CLO; |
| |
| if ((txn->flags & TX_CON_WANT_MSK) < tmp) |
| txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | tmp; |
| |
| if (!(txn->flags & TX_HDR_CONN_PRS)) { |
| /* parse the Connection header and possibly clean it */ |
| int to_del = 0; |
| if ((txn->flags & TX_REQ_VER_11) || |
| ((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL && |
| !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA))) |
| to_del |= 2; /* remove "keep-alive" */ |
| if (!(txn->flags & TX_REQ_VER_11)) |
| to_del |= 1; /* remove "close" */ |
| http_parse_connection_header(txn, msg, req, to_del); |
| } |
| |
| /* check if client or config asks for explicit close in KAL/SCL */ |
| if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL || |
| (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) && |
| ((txn->flags & TX_HDR_CONN_CLO) || /* "connection: close" */ |
| (txn->flags & (TX_REQ_VER_11|TX_HDR_CONN_KAL)) == 0 || /* no "connection: k-a" in 1.0 */ |
| ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE) || /* httpclose+any = forceclose */ |
| !(txn->flags & TX_REQ_XFER_LEN) || /* no length known => close */ |
| s->fe->state == PR_STSTOPPED)) /* frontend is stopping */ |
| txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO; |
| } |
| |
| /* add request headers from the rule sets in the same order */ |
| list_for_each_entry(wl, &px->req_add, list) { |
| if (wl->cond) { |
| int ret = acl_exec_cond(wl->cond, px, s, txn, ACL_DIR_REQ); |
| ret = acl_pass(ret); |
| if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| if (!ret) |
| continue; |
| } |
| |
| if (unlikely(http_header_add_tail(req, &txn->req, &txn->hdr_idx, wl->s) < 0)) |
| goto return_bad_req; |
| } |
| |
| if (req_acl_final && req_acl_final->action == PR_REQ_ACL_ACT_HTTP_AUTH) { |
| struct chunk msg; |
| char *realm = req_acl->http_auth.realm; |
| |
| if (!realm) |
| realm = do_stats?STATS_DEFAULT_REALM:px->id; |
| |
| sprintf(trash, (txn->flags & TX_USE_PX_CONN) ? HTTP_407_fmt : HTTP_401_fmt, realm); |
| chunk_initlen(&msg, trash, sizeof(trash), strlen(trash)); |
| txn->status = 401; |
| stream_int_retnclose(req->prod, &msg); |
| /* on 401 we still count one error, because normal browsing |
| * won't significantly increase the counter but brute force |
| * attempts will. |
| */ |
| session_inc_http_err_ctr(s); |
| goto return_prx_cond; |
| } |
| |
| if (do_stats) { |
| struct stats_admin_rule *stats_admin_rule; |
| |
| /* We need to provide stats for this request. |
| * FIXME!!! that one is rather dangerous, we want to |
| * make it follow standard rules (eg: clear req->analysers). |
| */ |
| |
| /* now check whether we have some admin rules for this request */ |
| list_for_each_entry(stats_admin_rule, &s->be->uri_auth->admin_rules, list) { |
| int ret = 1; |
| |
| if (stats_admin_rule->cond) { |
| ret = acl_exec_cond(stats_admin_rule->cond, s->be, s, &s->txn, ACL_DIR_REQ); |
| ret = acl_pass(ret); |
| if (stats_admin_rule->cond->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| } |
| |
| if (ret) { |
| /* no rule, or the rule matches */ |
| s->data_ctx.stats.flags |= STAT_ADMIN; |
| break; |
| } |
| } |
| |
| /* Was the status page requested with a POST ? */ |
| if (txn->meth == HTTP_METH_POST) { |
| if (s->data_ctx.stats.flags & STAT_ADMIN) { |
| http_process_req_stat_post(s, req); |
| } else { |
| s->data_ctx.stats.st_code = STAT_STATUS_DENY; |
| } |
| } |
| |
| s->logs.tv_request = now; |
| s->data_source = DATA_SRC_STATS; |
| s->data_state = DATA_ST_INIT; |
| s->task->nice = -32; /* small boost for HTTP statistics */ |
| stream_int_register_handler(s->rep->prod, http_stats_io_handler); |
| s->rep->prod->private = s; |
| s->rep->prod->st0 = s->rep->prod->st1 = 0; |
| req->analysers = 0; |
| |
| return 0; |
| |
| } |
| |
| /* check whether we have some ACLs set to redirect this request */ |
| list_for_each_entry(rule, &px->redirect_rules, list) { |
| int ret = ACL_PAT_PASS; |
| |
| if (rule->cond) { |
| ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ); |
| ret = acl_pass(ret); |
| if (rule->cond->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| } |
| |
| if (ret) { |
| struct chunk rdr = { .str = trash, .size = sizeof(trash), .len = 0 }; |
| const char *msg_fmt; |
| |
| /* build redirect message */ |
| switch(rule->code) { |
| case 303: |
| msg_fmt = HTTP_303; |
| break; |
| case 301: |
| msg_fmt = HTTP_301; |
| break; |
| case 302: |
| default: |
| msg_fmt = HTTP_302; |
| break; |
| } |
| |
| if (unlikely(!chunk_strcpy(&rdr, msg_fmt))) |
| goto return_bad_req; |
| |
| switch(rule->type) { |
| case REDIRECT_TYPE_PREFIX: { |
| const char *path; |
| int pathlen; |
| |
| path = http_get_path(txn); |
| /* build message using path */ |
| if (path) { |
| pathlen = txn->req.sl.rq.u_l + (txn->req.sol + txn->req.sl.rq.u) - path; |
| if (rule->flags & REDIRECT_FLAG_DROP_QS) { |
| int qs = 0; |
| while (qs < pathlen) { |
| if (path[qs] == '?') { |
| pathlen = qs; |
| break; |
| } |
| qs++; |
| } |
| } |
| } else { |
| path = "/"; |
| pathlen = 1; |
| } |
| |
| if (rdr.len + rule->rdr_len + pathlen > rdr.size - 4) |
| goto return_bad_req; |
| |
| /* add prefix. Note that if prefix == "/", we don't want to |
| * add anything, otherwise it makes it hard for the user to |
| * configure a self-redirection. |
| */ |
| if (rule->rdr_len != 1 || *rule->rdr_str != '/') { |
| memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len); |
| rdr.len += rule->rdr_len; |
| } |
| |
| /* add path */ |
| memcpy(rdr.str + rdr.len, path, pathlen); |
| rdr.len += pathlen; |
| |
| /* append a slash at the end of the location is needed and missing */ |
| if (rdr.len && rdr.str[rdr.len - 1] != '/' && |
| (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) { |
| if (rdr.len > rdr.size - 5) |
| goto return_bad_req; |
| rdr.str[rdr.len] = '/'; |
| rdr.len++; |
| } |
| |
| break; |
| } |
| case REDIRECT_TYPE_LOCATION: |
| default: |
| if (rdr.len + rule->rdr_len > rdr.size - 4) |
| goto return_bad_req; |
| |
| /* add location */ |
| memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len); |
| rdr.len += rule->rdr_len; |
| break; |
| } |
| |
| if (rule->cookie_len) { |
| memcpy(rdr.str + rdr.len, "\r\nSet-Cookie: ", 14); |
| rdr.len += 14; |
| memcpy(rdr.str + rdr.len, rule->cookie_str, rule->cookie_len); |
| rdr.len += rule->cookie_len; |
| memcpy(rdr.str + rdr.len, "\r\n", 2); |
| rdr.len += 2; |
| } |
| |
| /* add end of headers and the keep-alive/close status. |
| * We may choose to set keep-alive if the Location begins |
| * with a slash, because the client will come back to the |
| * same server. |
| */ |
| txn->status = rule->code; |
| /* let's log the request time */ |
| s->logs.tv_request = now; |
| |
| if (rule->rdr_len >= 1 && *rule->rdr_str == '/' && |
| (txn->flags & TX_REQ_XFER_LEN) && |
| !(txn->flags & TX_REQ_TE_CHNK) && !txn->req.hdr_content_len && |
| ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL || |
| (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL)) { |
| /* keep-alive possible */ |
| if (!(txn->flags & TX_REQ_VER_11)) { |
| if (unlikely(txn->flags & TX_USE_PX_CONN)) { |
| memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: keep-alive", 30); |
| rdr.len += 30; |
| } else { |
| memcpy(rdr.str + rdr.len, "\r\nConnection: keep-alive", 24); |
| rdr.len += 24; |
| } |
| } |
| memcpy(rdr.str + rdr.len, "\r\n\r\n", 4); |
| rdr.len += 4; |
| buffer_write(req->prod->ob, rdr.str, rdr.len); |
| /* "eat" the request */ |
| buffer_ignore(req, msg->sov - msg->som); |
| msg->som = msg->sov; |
| req->analysers = AN_REQ_HTTP_XFER_BODY; |
| s->rep->analysers = AN_RES_HTTP_XFER_BODY; |
| txn->req.msg_state = HTTP_MSG_CLOSED; |
| txn->rsp.msg_state = HTTP_MSG_DONE; |
| break; |
| } else { |
| /* keep-alive not possible */ |
| if (unlikely(txn->flags & TX_USE_PX_CONN)) { |
| memcpy(rdr.str + rdr.len, "\r\nProxy-Connection: close\r\n\r\n", 29); |
| rdr.len += 29; |
| } else { |
| memcpy(rdr.str + rdr.len, "\r\nConnection: close\r\n\r\n", 23); |
| rdr.len += 23; |
| } |
| stream_int_retnclose(req->prod, &rdr); |
| goto return_prx_cond; |
| } |
| } |
| } |
| |
| /* POST requests may be accompanied with an "Expect: 100-Continue" header. |
| * If this happens, then the data will not come immediately, so we must |
| * send all what we have without waiting. Note that due to the small gain |
| * in waiting for the body of the request, it's easier to simply put the |
| * BF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove |
| * itself once used. |
| */ |
| req->flags |= BF_SEND_DONTWAIT; |
| |
| /* that's OK for us now, let's move on to next analysers */ |
| return 1; |
| |
| return_bad_req: |
| /* We centralize bad requests processing here */ |
| if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) { |
| /* we detected a parsing error. We want to archive this request |
| * in the dedicated proxy area for later troubleshooting. |
| */ |
| http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe); |
| } |
| |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| txn->status = 400; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400)); |
| |
| s->fe->counters.failed_req++; |
| if (s->listener->counters) |
| s->listener->counters->failed_req++; |
| |
| return_prx_cond: |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_PRXCOND; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_R; |
| |
| req->analysers = 0; |
| req->analyse_exp = TICK_ETERNITY; |
| return 0; |
| } |
| |
| /* This function performs all the processing enabled for the current request. |
| * It returns 1 if the processing can continue on next analysers, or zero if it |
| * needs more data, encounters an error, or wants to immediately abort the |
| * request. It relies on buffers flags, and updates s->req->analysers. |
| */ |
| int http_process_request(struct session *s, struct buffer *req, int an_bit) |
| { |
| struct http_txn *txn = &s->txn; |
| struct http_msg *msg = &txn->req; |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) { |
| /* we need more data */ |
| buffer_dont_connect(req); |
| return 0; |
| } |
| |
| DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| req, |
| req->rex, req->wex, |
| req->flags, |
| req->l, |
| req->analysers); |
| |
| /* |
| * Right now, we know that we have processed the entire headers |
| * and that unwanted requests have been filtered out. We can do |
| * whatever we want with the remaining request. Also, now we |
| * may have separate values for ->fe, ->be. |
| */ |
| |
| /* |
| * If HTTP PROXY is set we simply get remote server address |
| * parsing incoming request. |
| */ |
| if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SN_ADDR_SET)) { |
| url2sa(msg->sol + msg->sl.rq.u, msg->sl.rq.u_l, &s->srv_addr); |
| } |
| |
| /* |
| * 7: Now we can work with the cookies. |
| * Note that doing so might move headers in the request, but |
| * the fields will stay coherent and the URI will not move. |
| * This should only be performed in the backend. |
| */ |
| if ((s->be->cookie_name || s->be->appsession_name || s->fe->capture_name) |
| && !(txn->flags & (TX_CLDENY|TX_CLTARPIT))) |
| manage_client_side_cookies(s, req); |
| |
| /* |
| * 8: the appsession cookie was looked up very early in 1.2, |
| * so let's do the same now. |
| */ |
| |
| /* It needs to look into the URI unless persistence must be ignored */ |
| if ((txn->sessid == NULL) && s->be->appsession_name && !(s->flags & SN_IGNORE_PRST)) { |
| get_srv_from_appsession(s, msg->sol + msg->sl.rq.u, msg->sl.rq.u_l); |
| } |
| |
| /* |
| * 9: add X-Forwarded-For if either the frontend or the backend |
| * asks for it. |
| */ |
| if ((s->fe->options | s->be->options) & PR_O_FWDFOR) { |
| if (s->cli_addr.ss_family == AF_INET) { |
| /* Add an X-Forwarded-For header unless the source IP is |
| * in the 'except' network range. |
| */ |
| if ((!s->fe->except_mask.s_addr || |
| (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->fe->except_mask.s_addr) |
| != s->fe->except_net.s_addr) && |
| (!s->be->except_mask.s_addr || |
| (((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->be->except_mask.s_addr) |
| != s->be->except_net.s_addr)) { |
| int len; |
| unsigned char *pn; |
| pn = (unsigned char *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr; |
| |
| /* Note: we rely on the backend to get the header name to be used for |
| * x-forwarded-for, because the header is really meant for the backends. |
| * However, if the backend did not specify any option, we have to rely |
| * on the frontend's header name. |
| */ |
| if (s->be->fwdfor_hdr_len) { |
| len = s->be->fwdfor_hdr_len; |
| memcpy(trash, s->be->fwdfor_hdr_name, len); |
| } else { |
| len = s->fe->fwdfor_hdr_len; |
| memcpy(trash, s->fe->fwdfor_hdr_name, len); |
| } |
| len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]); |
| |
| if (unlikely(http_header_add_tail2(req, &txn->req, |
| &txn->hdr_idx, trash, len) < 0)) |
| goto return_bad_req; |
| } |
| } |
| else if (s->cli_addr.ss_family == AF_INET6) { |
| /* FIXME: for the sake of completeness, we should also support |
| * 'except' here, although it is mostly useless in this case. |
| */ |
| int len; |
| char pn[INET6_ADDRSTRLEN]; |
| inet_ntop(AF_INET6, |
| (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr, |
| pn, sizeof(pn)); |
| |
| /* Note: we rely on the backend to get the header name to be used for |
| * x-forwarded-for, because the header is really meant for the backends. |
| * However, if the backend did not specify any option, we have to rely |
| * on the frontend's header name. |
| */ |
| if (s->be->fwdfor_hdr_len) { |
| len = s->be->fwdfor_hdr_len; |
| memcpy(trash, s->be->fwdfor_hdr_name, len); |
| } else { |
| len = s->fe->fwdfor_hdr_len; |
| memcpy(trash, s->fe->fwdfor_hdr_name, len); |
| } |
| len += sprintf(trash + len, ": %s", pn); |
| |
| if (unlikely(http_header_add_tail2(req, &txn->req, |
| &txn->hdr_idx, trash, len) < 0)) |
| goto return_bad_req; |
| } |
| } |
| |
| /* |
| * 10: add X-Original-To if either the frontend or the backend |
| * asks for it. |
| */ |
| if ((s->fe->options | s->be->options) & PR_O_ORGTO) { |
| |
| /* FIXME: don't know if IPv6 can handle that case too. */ |
| if (s->cli_addr.ss_family == AF_INET) { |
| /* Add an X-Original-To header unless the destination IP is |
| * in the 'except' network range. |
| */ |
| if (!(s->flags & SN_FRT_ADDR_SET)) |
| get_frt_addr(s); |
| |
| if (s->frt_addr.ss_family == AF_INET && |
| ((!s->fe->except_mask_to.s_addr || |
| (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->fe->except_mask_to.s_addr) |
| != s->fe->except_to.s_addr) && |
| (!s->be->except_mask_to.s_addr || |
| (((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->be->except_mask_to.s_addr) |
| != s->be->except_to.s_addr))) { |
| int len; |
| unsigned char *pn; |
| pn = (unsigned char *)&((struct sockaddr_in *)&s->frt_addr)->sin_addr; |
| |
| /* Note: we rely on the backend to get the header name to be used for |
| * x-original-to, because the header is really meant for the backends. |
| * However, if the backend did not specify any option, we have to rely |
| * on the frontend's header name. |
| */ |
| if (s->be->orgto_hdr_len) { |
| len = s->be->orgto_hdr_len; |
| memcpy(trash, s->be->orgto_hdr_name, len); |
| } else { |
| len = s->fe->orgto_hdr_len; |
| memcpy(trash, s->fe->orgto_hdr_name, len); |
| } |
| len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]); |
| |
| if (unlikely(http_header_add_tail2(req, &txn->req, |
| &txn->hdr_idx, trash, len) < 0)) |
| goto return_bad_req; |
| } |
| } |
| } |
| |
| /* 11: add "Connection: close" or "Connection: keep-alive" if needed and not yet set. */ |
| if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) || |
| ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) { |
| unsigned int want_flags = 0; |
| |
| if (txn->flags & TX_REQ_VER_11) { |
| if (((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL || |
| ((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) && |
| !((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)) |
| want_flags |= TX_CON_CLO_SET; |
| } else { |
| if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL && |
| !((s->fe->options|s->be->options) & PR_O_HTTP_CLOSE)) || |
| ((s->fe->options2|s->be->options2) & PR_O2_FAKE_KA)) |
| want_flags |= TX_CON_KAL_SET; |
| } |
| |
| if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET))) |
| http_change_connection_header(txn, msg, req, want_flags); |
| } |
| |
| |
| /* If we have no server assigned yet and we're balancing on url_param |
| * with a POST request, we may be interested in checking the body for |
| * that parameter. This will be done in another analyser. |
| */ |
| if (!(s->flags & (SN_ASSIGNED|SN_DIRECT)) && |
| s->txn.meth == HTTP_METH_POST && s->be->url_param_name != NULL && |
| s->be->url_param_post_limit != 0 && |
| (txn->flags & (TX_REQ_CNT_LEN|TX_REQ_TE_CHNK)) && |
| memchr(msg->sol + msg->sl.rq.u, '?', msg->sl.rq.u_l) == NULL) { |
| buffer_dont_connect(req); |
| req->analysers |= AN_REQ_HTTP_BODY; |
| } |
| |
| if (txn->flags & TX_REQ_XFER_LEN) |
| req->analysers |= AN_REQ_HTTP_XFER_BODY; |
| |
| /************************************************************* |
| * OK, that's finished for the headers. We have done what we * |
| * could. Let's switch to the DATA state. * |
| ************************************************************/ |
| req->analyse_exp = TICK_ETERNITY; |
| req->analysers &= ~an_bit; |
| |
| s->logs.tv_request = now; |
| /* OK let's go on with the BODY now */ |
| return 1; |
| |
| return_bad_req: /* let's centralize all bad requests */ |
| if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) { |
| /* we detected a parsing error. We want to archive this request |
| * in the dedicated proxy area for later troubleshooting. |
| */ |
| http_capture_bad_message(&s->fe->invalid_req, s, req, msg, msg->msg_state, s->fe); |
| } |
| |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| txn->status = 400; |
| req->analysers = 0; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400)); |
| |
| s->fe->counters.failed_req++; |
| if (s->listener->counters) |
| s->listener->counters->failed_req++; |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_PRXCOND; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_R; |
| return 0; |
| } |
| |
| /* This function is an analyser which processes the HTTP tarpit. It always |
| * returns zero, at the beginning because it prevents any other processing |
| * from occurring, and at the end because it terminates the request. |
| */ |
| int http_process_tarpit(struct session *s, struct buffer *req, int an_bit) |
| { |
| struct http_txn *txn = &s->txn; |
| |
| /* This connection is being tarpitted. The CLIENT side has |
| * already set the connect expiration date to the right |
| * timeout. We just have to check that the client is still |
| * there and that the timeout has not expired. |
| */ |
| buffer_dont_connect(req); |
| if ((req->flags & (BF_SHUTR|BF_READ_ERROR)) == 0 && |
| !tick_is_expired(req->analyse_exp, now_ms)) |
| return 0; |
| |
| /* We will set the queue timer to the time spent, just for |
| * logging purposes. We fake a 500 server error, so that the |
| * attacker will not suspect his connection has been tarpitted. |
| * It will not cause trouble to the logs because we can exclude |
| * the tarpitted connections by filtering on the 'PT' status flags. |
| */ |
| s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now); |
| |
| txn->status = 500; |
| if (req->flags != BF_READ_ERROR) |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_500)); |
| |
| req->analysers = 0; |
| req->analyse_exp = TICK_ETERNITY; |
| |
| s->fe->counters.failed_req++; |
| if (s->listener->counters) |
| s->listener->counters->failed_req++; |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_PRXCOND; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_T; |
| return 0; |
| } |
| |
| /* This function is an analyser which processes the HTTP request body. It looks |
| * for parameters to be used for the load balancing algorithm (url_param). It |
| * must only be called after the standard HTTP request processing has occurred, |
| * because it expects the request to be parsed. It returns zero if it needs to |
| * read more data, or 1 once it has completed its analysis. |
| */ |
| int http_process_request_body(struct session *s, struct buffer *req, int an_bit) |
| { |
| struct http_txn *txn = &s->txn; |
| struct http_msg *msg = &s->txn.req; |
| long long limit = s->be->url_param_post_limit; |
| |
| /* We have to parse the HTTP request body to find any required data. |
| * "balance url_param check_post" should have been the only way to get |
| * into this. We were brought here after HTTP header analysis, so all |
| * related structures are ready. |
| */ |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) |
| goto missing_data; |
| |
| if (msg->msg_state < HTTP_MSG_100_SENT) { |
| /* If we have HTTP/1.1 and Expect: 100-continue, then we must |
| * send an HTTP/1.1 100 Continue intermediate response. |
| */ |
| if (txn->flags & TX_REQ_VER_11) { |
| struct hdr_ctx ctx; |
| ctx.idx = 0; |
| /* Expect is allowed in 1.1, look for it */ |
| if (http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx) && |
| unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) { |
| buffer_write(s->rep, http_100_chunk.str, http_100_chunk.len); |
| } |
| } |
| msg->msg_state = HTTP_MSG_100_SENT; |
| } |
| |
| if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) { |
| /* we have msg->col and msg->sov which both point to the first |
| * byte of message body. msg->som still points to the beginning |
| * of the message. We must save the body in req->lr because it |
| * survives buffer re-alignments. |
| */ |
| req->lr = req->data + msg->sov; |
| if (txn->flags & TX_REQ_TE_CHNK) |
| msg->msg_state = HTTP_MSG_CHUNK_SIZE; |
| else |
| msg->msg_state = HTTP_MSG_DATA; |
| } |
| |
| if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) { |
| /* read the chunk size and assign it to ->hdr_content_len, then |
| * set ->sov and ->lr to point to the body and switch to DATA or |
| * TRAILERS state. |
| */ |
| int ret = http_parse_chunk_size(req, msg); |
| |
| if (!ret) |
| goto missing_data; |
| else if (ret < 0) { |
| session_inc_http_err_ctr(s); |
| goto return_bad_req; |
| } |
| } |
| |
| /* Now we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state. |
| * We have the first non-header byte in msg->col, which is either the |
| * beginning of the chunk size or of the data. The first data byte is in |
| * msg->sov, which is equal to msg->col when not using transfer-encoding. |
| * We're waiting for at least <url_param_post_limit> bytes after msg->sov. |
| */ |
| |
| if (msg->hdr_content_len < limit) |
| limit = msg->hdr_content_len; |
| |
| if (req->l - (msg->sov - msg->som) >= limit) /* we have enough bytes now */ |
| goto http_end; |
| |
| missing_data: |
| /* we get here if we need to wait for more data */ |
| if (req->flags & BF_FULL) { |
| session_inc_http_err_ctr(s); |
| goto return_bad_req; |
| } |
| |
| if ((req->flags & BF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) { |
| txn->status = 408; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408)); |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_CLITO; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_D; |
| goto return_err_msg; |
| } |
| |
| /* we get here if we need to wait for more data */ |
| if (!(req->flags & (BF_FULL | BF_READ_ERROR | BF_SHUTR))) { |
| /* Not enough data. We'll re-use the http-request |
| * timeout here. Ideally, we should set the timeout |
| * relative to the accept() date. We just set the |
| * request timeout once at the beginning of the |
| * request. |
| */ |
| buffer_dont_connect(req); |
| if (!tick_isset(req->analyse_exp)) |
| req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq); |
| return 0; |
| } |
| |
| http_end: |
| /* The situation will not evolve, so let's give up on the analysis. */ |
| s->logs.tv_request = now; /* update the request timer to reflect full request */ |
| req->analysers &= ~an_bit; |
| req->analyse_exp = TICK_ETERNITY; |
| return 1; |
| |
| return_bad_req: /* let's centralize all bad requests */ |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| txn->status = 400; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400)); |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_PRXCOND; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_R; |
| |
| return_err_msg: |
| req->analysers = 0; |
| s->fe->counters.failed_req++; |
| if (s->listener->counters) |
| s->listener->counters->failed_req++; |
| return 0; |
| } |
| |
| /* Terminate current transaction and prepare a new one. This is very tricky |
| * right now but it works. |
| */ |
| void http_end_txn_clean_session(struct session *s) |
| { |
| /* FIXME: We need a more portable way of releasing a backend's and a |
| * server's connections. We need a safer way to reinitialize buffer |
| * flags. We also need a more accurate method for computing per-request |
| * data. |
| */ |
| http_silent_debug(__LINE__, s); |
| |
| s->req->cons->flags |= SI_FL_NOLINGER; |
| s->req->cons->shutr(s->req->cons); |
| s->req->cons->shutw(s->req->cons); |
| |
| http_silent_debug(__LINE__, s); |
| |
| if (s->flags & SN_BE_ASSIGNED) |
| s->be->beconn--; |
| |
| s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now); |
| session_process_counters(s); |
| session_stop_backend_counters(s); |
| |
| if (s->txn.status) { |
| int n; |
| |
| n = s->txn.status / 100; |
| if (n < 1 || n > 5) |
| n = 0; |
| |
| if (s->fe->mode == PR_MODE_HTTP) |
| s->fe->counters.fe.http.rsp[n]++; |
| |
| if ((s->flags & SN_BE_ASSIGNED) && |
| (s->be->mode == PR_MODE_HTTP)) |
| s->be->counters.be.http.rsp[n]++; |
| } |
| |
| /* don't count other requests' data */ |
| s->logs.bytes_in -= s->req->l - s->req->send_max; |
| s->logs.bytes_out -= s->rep->l - s->rep->send_max; |
| |
| /* let's do a final log if we need it */ |
| if (s->logs.logwait && |
| !(s->flags & SN_MONITOR) && |
| (!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) { |
| s->do_log(s); |
| } |
| |
| s->logs.accept_date = date; /* user-visible date for logging */ |
| s->logs.tv_accept = now; /* corrected date for internal use */ |
| tv_zero(&s->logs.tv_request); |
| s->logs.t_queue = -1; |
| s->logs.t_connect = -1; |
| s->logs.t_data = -1; |
| s->logs.t_close = 0; |
| s->logs.prx_queue_size = 0; /* we get the number of pending conns before us */ |
| s->logs.srv_queue_size = 0; /* we will get this number soon */ |
| |
| s->logs.bytes_in = s->req->total = s->req->l - s->req->send_max; |
| s->logs.bytes_out = s->rep->total = s->rep->l - s->rep->send_max; |
| |
| if (s->pend_pos) |
| pendconn_free(s->pend_pos); |
| |
| if (s->srv) { |
| if (s->flags & SN_CURR_SESS) { |
| s->flags &= ~SN_CURR_SESS; |
| s->srv->cur_sess--; |
| } |
| if (may_dequeue_tasks(s->srv, s->be)) |
| process_srv_queue(s->srv); |
| } |
| |
| if (unlikely(s->srv_conn)) |
| sess_change_server(s, NULL); |
| s->srv = NULL; |
| |
| s->req->cons->state = s->req->cons->prev_state = SI_ST_INI; |
| s->req->cons->fd = -1; /* just to help with debugging */ |
| s->req->cons->err_type = SI_ET_NONE; |
| s->req->cons->err_loc = NULL; |
| s->req->cons->exp = TICK_ETERNITY; |
| s->req->cons->flags = SI_FL_NONE; |
| s->req->flags &= ~(BF_SHUTW|BF_SHUTW_NOW|BF_AUTO_CONNECT|BF_WRITE_ERROR|BF_STREAMER|BF_STREAMER_FAST); |
| s->rep->flags &= ~(BF_SHUTR|BF_SHUTR_NOW|BF_READ_ATTACHED|BF_READ_ERROR|BF_READ_NOEXP|BF_STREAMER|BF_STREAMER_FAST|BF_WRITE_PARTIAL); |
| s->flags &= ~(SN_DIRECT|SN_ASSIGNED|SN_ADDR_SET|SN_BE_ASSIGNED|SN_FORCE_PRST|SN_IGNORE_PRST); |
| s->flags &= ~(SN_CURR_SESS|SN_REDIRECTABLE); |
| s->txn.meth = 0; |
| http_reset_txn(s); |
| s->txn.flags |= TX_NOT_FIRST | TX_WAIT_NEXT_RQ; |
| if (s->fe->options2 & PR_O2_INDEPSTR) |
| s->req->cons->flags |= SI_FL_INDEP_STR; |
| |
| /* if the request buffer is not empty, it means we're |
| * about to process another request, so send pending |
| * data with MSG_MORE to merge TCP packets when possible. |
| * Just don't do this if the buffer is close to be full, |
| * because the request will wait for it to flush a little |
| * bit before proceeding. |
| */ |
| if (s->req->l > s->req->send_max) { |
| if (s->rep->send_max && |
| !(s->rep->flags & BF_FULL) && |
| s->rep->r <= s->rep->data + s->rep->size - global.tune.maxrewrite) |
| s->rep->flags |= BF_EXPECT_MORE; |
| } |
| |
| /* we're removing the analysers, we MUST re-enable events detection */ |
| buffer_auto_read(s->req); |
| buffer_auto_close(s->req); |
| buffer_auto_read(s->rep); |
| buffer_auto_close(s->rep); |
| |
| /* make ->lr point to the first non-forwarded byte */ |
| s->req->lr = s->req->w + s->req->send_max; |
| if (s->req->lr >= s->req->data + s->req->size) |
| s->req->lr -= s->req->size; |
| s->rep->lr = s->rep->w + s->rep->send_max; |
| if (s->rep->lr >= s->rep->data + s->rep->size) |
| s->rep->lr -= s->req->size; |
| |
| s->req->analysers = s->listener->analysers; |
| s->req->analysers &= ~AN_REQ_DECODE_PROXY; |
| s->rep->analysers = 0; |
| |
| http_silent_debug(__LINE__, s); |
| } |
| |
| |
| /* This function updates the request state machine according to the response |
| * state machine and buffer flags. It returns 1 if it changes anything (flag |
| * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as |
| * it is only used to find when a request/response couple is complete. Both |
| * this function and its equivalent should loop until both return zero. It |
| * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR. |
| */ |
| int http_sync_req_state(struct session *s) |
| { |
| struct buffer *buf = s->req; |
| struct http_txn *txn = &s->txn; |
| unsigned int old_flags = buf->flags; |
| unsigned int old_state = txn->req.msg_state; |
| |
| http_silent_debug(__LINE__, s); |
| if (unlikely(txn->req.msg_state < HTTP_MSG_BODY)) |
| return 0; |
| |
| if (txn->req.msg_state == HTTP_MSG_DONE) { |
| /* No need to read anymore, the request was completely parsed. |
| * We can shut the read side unless we want to abort_on_close, |
| * or we have a POST request. The issue with POST requests is |
| * that some browsers still send a CRLF after the request, and |
| * this CRLF must be read so that it does not remain in the kernel |
| * buffers, otherwise a close could cause an RST on some systems |
| * (eg: Linux). |
| */ |
| if (!(s->be->options & PR_O_ABRT_CLOSE) && txn->meth != HTTP_METH_POST) |
| buffer_dont_read(buf); |
| |
| if (txn->rsp.msg_state == HTTP_MSG_ERROR) |
| goto wait_other_side; |
| |
| if (txn->rsp.msg_state < HTTP_MSG_DONE) { |
| /* The server has not finished to respond, so we |
| * don't want to move in order not to upset it. |
| */ |
| goto wait_other_side; |
| } |
| |
| if (txn->rsp.msg_state == HTTP_MSG_TUNNEL) { |
| /* if any side switches to tunnel mode, the other one does too */ |
| buffer_auto_read(buf); |
| txn->req.msg_state = HTTP_MSG_TUNNEL; |
| goto wait_other_side; |
| } |
| |
| /* When we get here, it means that both the request and the |
| * response have finished receiving. Depending on the connection |
| * mode, we'll have to wait for the last bytes to leave in either |
| * direction, and sometimes for a close to be effective. |
| */ |
| |
| if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) { |
| /* Server-close mode : queue a connection close to the server */ |
| if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) |
| buffer_shutw_now(buf); |
| } |
| else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) { |
| /* Option forceclose is set, or either side wants to close, |
| * let's enforce it now that we're not expecting any new |
| * data to come. The caller knows the session is complete |
| * once both states are CLOSED. |
| */ |
| if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) { |
| buffer_shutr_now(buf); |
| buffer_shutw_now(buf); |
| } |
| } |
| else { |
| /* The last possible modes are keep-alive and tunnel. Since tunnel |
| * mode does not set the body analyser, we can't reach this place |
| * in tunnel mode, so we're left with keep-alive only. |
| * This mode is currently not implemented, we switch to tunnel mode. |
| */ |
| buffer_auto_read(buf); |
| txn->req.msg_state = HTTP_MSG_TUNNEL; |
| } |
| |
| if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) { |
| /* if we've just closed an output, let's switch */ |
| buf->cons->flags |= SI_FL_NOLINGER; /* we want to close ASAP */ |
| |
| if (!(buf->flags & BF_OUT_EMPTY)) { |
| txn->req.msg_state = HTTP_MSG_CLOSING; |
| goto http_msg_closing; |
| } |
| else { |
| txn->req.msg_state = HTTP_MSG_CLOSED; |
| goto http_msg_closed; |
| } |
| } |
| goto wait_other_side; |
| } |
| |
| if (txn->req.msg_state == HTTP_MSG_CLOSING) { |
| http_msg_closing: |
| /* nothing else to forward, just waiting for the output buffer |
| * to be empty and for the shutw_now to take effect. |
| */ |
| if (buf->flags & BF_OUT_EMPTY) { |
| txn->req.msg_state = HTTP_MSG_CLOSED; |
| goto http_msg_closed; |
| } |
| else if (buf->flags & BF_SHUTW) { |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| goto wait_other_side; |
| } |
| } |
| |
| if (txn->req.msg_state == HTTP_MSG_CLOSED) { |
| http_msg_closed: |
| goto wait_other_side; |
| } |
| |
| wait_other_side: |
| http_silent_debug(__LINE__, s); |
| return txn->req.msg_state != old_state || buf->flags != old_flags; |
| } |
| |
| |
| /* This function updates the response state machine according to the request |
| * state machine and buffer flags. It returns 1 if it changes anything (flag |
| * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as |
| * it is only used to find when a request/response couple is complete. Both |
| * this function and its equivalent should loop until both return zero. It |
| * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR. |
| */ |
| int http_sync_res_state(struct session *s) |
| { |
| struct buffer *buf = s->rep; |
| struct http_txn *txn = &s->txn; |
| unsigned int old_flags = buf->flags; |
| unsigned int old_state = txn->rsp.msg_state; |
| |
| http_silent_debug(__LINE__, s); |
| if (unlikely(txn->rsp.msg_state < HTTP_MSG_BODY)) |
| return 0; |
| |
| if (txn->rsp.msg_state == HTTP_MSG_DONE) { |
| /* In theory, we don't need to read anymore, but we must |
| * still monitor the server connection for a possible close |
| * while the request is being uploaded, so we don't disable |
| * reading. |
| */ |
| /* buffer_dont_read(buf); */ |
| |
| if (txn->req.msg_state == HTTP_MSG_ERROR) |
| goto wait_other_side; |
| |
| if (txn->req.msg_state < HTTP_MSG_DONE) { |
| /* The client seems to still be sending data, probably |
| * because we got an error response during an upload. |
| * We have the choice of either breaking the connection |
| * or letting it pass through. Let's do the later. |
| */ |
| goto wait_other_side; |
| } |
| |
| if (txn->req.msg_state == HTTP_MSG_TUNNEL) { |
| /* if any side switches to tunnel mode, the other one does too */ |
| buffer_auto_read(buf); |
| txn->rsp.msg_state = HTTP_MSG_TUNNEL; |
| goto wait_other_side; |
| } |
| |
| /* When we get here, it means that both the request and the |
| * response have finished receiving. Depending on the connection |
| * mode, we'll have to wait for the last bytes to leave in either |
| * direction, and sometimes for a close to be effective. |
| */ |
| |
| if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) { |
| /* Server-close mode : shut read and wait for the request |
| * side to close its output buffer. The caller will detect |
| * when we're in DONE and the other is in CLOSED and will |
| * catch that for the final cleanup. |
| */ |
| if (!(buf->flags & (BF_SHUTR|BF_SHUTR_NOW))) |
| buffer_shutr_now(buf); |
| } |
| else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) { |
| /* Option forceclose is set, or either side wants to close, |
| * let's enforce it now that we're not expecting any new |
| * data to come. The caller knows the session is complete |
| * once both states are CLOSED. |
| */ |
| if (!(buf->flags & (BF_SHUTW|BF_SHUTW_NOW))) { |
| buffer_shutr_now(buf); |
| buffer_shutw_now(buf); |
| } |
| } |
| else { |
| /* The last possible modes are keep-alive and tunnel. Since tunnel |
| * mode does not set the body analyser, we can't reach this place |
| * in tunnel mode, so we're left with keep-alive only. |
| * This mode is currently not implemented, we switch to tunnel mode. |
| */ |
| buffer_auto_read(buf); |
| txn->rsp.msg_state = HTTP_MSG_TUNNEL; |
| } |
| |
| if (buf->flags & (BF_SHUTW|BF_SHUTW_NOW)) { |
| /* if we've just closed an output, let's switch */ |
| if (!(buf->flags & BF_OUT_EMPTY)) { |
| txn->rsp.msg_state = HTTP_MSG_CLOSING; |
| goto http_msg_closing; |
| } |
| else { |
| txn->rsp.msg_state = HTTP_MSG_CLOSED; |
| goto http_msg_closed; |
| } |
| } |
| goto wait_other_side; |
| } |
| |
| if (txn->rsp.msg_state == HTTP_MSG_CLOSING) { |
| http_msg_closing: |
| /* nothing else to forward, just waiting for the output buffer |
| * to be empty and for the shutw_now to take effect. |
| */ |
| if (buf->flags & BF_OUT_EMPTY) { |
| txn->rsp.msg_state = HTTP_MSG_CLOSED; |
| goto http_msg_closed; |
| } |
| else if (buf->flags & BF_SHUTW) { |
| txn->rsp.msg_state = HTTP_MSG_ERROR; |
| s->be->counters.cli_aborts++; |
| if (s->srv) |
| s->srv->counters.cli_aborts++; |
| goto wait_other_side; |
| } |
| } |
| |
| if (txn->rsp.msg_state == HTTP_MSG_CLOSED) { |
| http_msg_closed: |
| /* drop any pending data */ |
| buffer_ignore(buf, buf->l - buf->send_max); |
| buffer_auto_close(buf); |
| buffer_auto_read(buf); |
| goto wait_other_side; |
| } |
| |
| wait_other_side: |
| http_silent_debug(__LINE__, s); |
| return txn->rsp.msg_state != old_state || buf->flags != old_flags; |
| } |
| |
| |
| /* Resync the request and response state machines. Return 1 if either state |
| * changes. |
| */ |
| int http_resync_states(struct session *s) |
| { |
| struct http_txn *txn = &s->txn; |
| int old_req_state = txn->req.msg_state; |
| int old_res_state = txn->rsp.msg_state; |
| |
| http_silent_debug(__LINE__, s); |
| http_sync_req_state(s); |
| while (1) { |
| http_silent_debug(__LINE__, s); |
| if (!http_sync_res_state(s)) |
| break; |
| http_silent_debug(__LINE__, s); |
| if (!http_sync_req_state(s)) |
| break; |
| } |
| http_silent_debug(__LINE__, s); |
| /* OK, both state machines agree on a compatible state. |
| * There are a few cases we're interested in : |
| * - HTTP_MSG_TUNNEL on either means we have to disable both analysers |
| * - HTTP_MSG_CLOSED on both sides means we've reached the end in both |
| * directions, so let's simply disable both analysers. |
| * - HTTP_MSG_CLOSED on the response only means we must abort the |
| * request. |
| * - HTTP_MSG_CLOSED on the request and HTTP_MSG_DONE on the response |
| * with server-close mode means we've completed one request and we |
| * must re-initialize the server connection. |
| */ |
| |
| if (txn->req.msg_state == HTTP_MSG_TUNNEL || |
| txn->rsp.msg_state == HTTP_MSG_TUNNEL || |
| (txn->req.msg_state == HTTP_MSG_CLOSED && |
| txn->rsp.msg_state == HTTP_MSG_CLOSED)) { |
| s->req->analysers = 0; |
| buffer_auto_close(s->req); |
| buffer_auto_read(s->req); |
| s->rep->analysers = 0; |
| buffer_auto_close(s->rep); |
| buffer_auto_read(s->rep); |
| } |
| else if (txn->rsp.msg_state == HTTP_MSG_CLOSED || |
| txn->rsp.msg_state == HTTP_MSG_ERROR || |
| txn->req.msg_state == HTTP_MSG_ERROR || |
| (s->rep->flags & BF_SHUTW)) { |
| s->rep->analysers = 0; |
| buffer_auto_close(s->rep); |
| buffer_auto_read(s->rep); |
| s->req->analysers = 0; |
| buffer_abort(s->req); |
| buffer_auto_close(s->req); |
| buffer_auto_read(s->req); |
| buffer_ignore(s->req, s->req->l - s->req->send_max); |
| } |
| else if (txn->req.msg_state == HTTP_MSG_CLOSED && |
| txn->rsp.msg_state == HTTP_MSG_DONE && |
| ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)) { |
| /* server-close: terminate this server connection and |
| * reinitialize a fresh-new transaction. |
| */ |
| http_end_txn_clean_session(s); |
| } |
| |
| http_silent_debug(__LINE__, s); |
| return txn->req.msg_state != old_req_state || |
| txn->rsp.msg_state != old_res_state; |
| } |
| |
| /* This function is an analyser which forwards request body (including chunk |
| * sizes if any). It is called as soon as we must forward, even if we forward |
| * zero byte. The only situation where it must not be called is when we're in |
| * tunnel mode and we want to forward till the close. It's used both to forward |
| * remaining data and to resync after end of body. It expects the msg_state to |
| * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to |
| * read more data, or 1 once we can go on with next request or end the session. |
| * When in MSG_DATA or MSG_TRAILERS, it will automatically forward hdr_content_len |
| * bytes of pending data + the headers if not already done (between som and sov). |
| * It eventually adjusts som to match sov after the data in between have been sent. |
| */ |
| int http_request_forward_body(struct session *s, struct buffer *req, int an_bit) |
| { |
| struct http_txn *txn = &s->txn; |
| struct http_msg *msg = &s->txn.req; |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) |
| return 0; |
| |
| if ((req->flags & (BF_READ_ERROR|BF_READ_TIMEOUT|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) || |
| ((req->flags & BF_SHUTW) && (req->to_forward || req->send_max))) { |
| /* Output closed while we were sending data. We must abort and |
| * wake the other side up. |
| */ |
| msg->msg_state = HTTP_MSG_ERROR; |
| http_resync_states(s); |
| return 1; |
| } |
| |
| /* in most states, we should abort in case of early close */ |
| buffer_auto_close(req); |
| |
| /* Note that we don't have to send 100-continue back because we don't |
| * need the data to complete our job, and it's up to the server to |
| * decide whether to return 100, 417 or anything else in return of |
| * an "Expect: 100-continue" header. |
| */ |
| |
| if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) { |
| /* we have msg->col and msg->sov which both point to the first |
| * byte of message body. msg->som still points to the beginning |
| * of the message. We must save the body in req->lr because it |
| * survives buffer re-alignments. |
| */ |
| req->lr = req->data + msg->sov; |
| if (txn->flags & TX_REQ_TE_CHNK) |
| msg->msg_state = HTTP_MSG_CHUNK_SIZE; |
| else { |
| msg->msg_state = HTTP_MSG_DATA; |
| } |
| } |
| |
| while (1) { |
| http_silent_debug(__LINE__, s); |
| /* we may have some data pending */ |
| if (msg->hdr_content_len || msg->som != msg->sov) { |
| int bytes = msg->sov - msg->som; |
| if (bytes < 0) /* sov may have wrapped at the end */ |
| bytes += req->size; |
| buffer_forward(req, bytes + msg->hdr_content_len); |
| msg->hdr_content_len = 0; /* don't forward that again */ |
| msg->som = msg->sov; |
| } |
| |
| if (msg->msg_state == HTTP_MSG_DATA) { |
| /* must still forward */ |
| if (req->to_forward) |
| goto missing_data; |
| |
| /* nothing left to forward */ |
| if (txn->flags & TX_REQ_TE_CHNK) |
| msg->msg_state = HTTP_MSG_DATA_CRLF; |
| else |
| msg->msg_state = HTTP_MSG_DONE; |
| } |
| else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) { |
| /* read the chunk size and assign it to ->hdr_content_len, then |
| * set ->sov and ->lr to point to the body and switch to DATA or |
| * TRAILERS state. |
| */ |
| int ret = http_parse_chunk_size(req, msg); |
| |
| if (!ret) |
| goto missing_data; |
| else if (ret < 0) { |
| session_inc_http_err_ctr(s); |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->fe->invalid_req, s, req, msg, HTTP_MSG_CHUNK_SIZE, s->be); |
| goto return_bad_req; |
| } |
| /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */ |
| /* Don't set a PUSH at the end of that chunk if it's not the last one */ |
| if (msg->msg_state == HTTP_MSG_DATA) |
| req->flags |= BF_EXPECT_MORE; |
| } |
| else if (msg->msg_state == HTTP_MSG_DATA_CRLF) { |
| /* we want the CRLF after the data */ |
| int ret; |
| |
| req->lr = req->w + req->send_max; |
| if (req->lr >= req->data + req->size) |
| req->lr -= req->size; |
| |
| ret = http_skip_chunk_crlf(req, msg); |
| |
| if (ret == 0) |
| goto missing_data; |
| else if (ret < 0) { |
| session_inc_http_err_ctr(s); |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->fe->invalid_req, s, req, msg, HTTP_MSG_DATA_CRLF, s->be); |
| goto return_bad_req; |
| } |
| /* we're in MSG_CHUNK_SIZE now */ |
| } |
| else if (msg->msg_state == HTTP_MSG_TRAILERS) { |
| int ret = http_forward_trailers(req, msg); |
| |
| if (ret == 0) |
| goto missing_data; |
| else if (ret < 0) { |
| session_inc_http_err_ctr(s); |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->fe->invalid_req, s, req, msg, HTTP_MSG_TRAILERS, s->be); |
| goto return_bad_req; |
| } |
| /* we're in HTTP_MSG_DONE now */ |
| } |
| else { |
| int old_state = msg->msg_state; |
| |
| /* other states, DONE...TUNNEL */ |
| /* for keep-alive we don't want to forward closes on DONE */ |
| if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL || |
| (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) |
| buffer_dont_close(req); |
| if (http_resync_states(s)) { |
| /* some state changes occurred, maybe the analyser |
| * was disabled too. |
| */ |
| if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) { |
| if (req->flags & BF_SHUTW) { |
| /* request errors are most likely due to |
| * the server aborting the transfer. |
| */ |
| goto aborted_xfer; |
| } |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->fe->invalid_req, s, req, msg, old_state, s->be); |
| goto return_bad_req; |
| } |
| return 1; |
| } |
| |
| /* If "option abortonclose" is set on the backend, we |
| * want to monitor the client's connection and forward |
| * any shutdown notification to the server, which will |
| * decide whether to close or to go on processing the |
| * request. |
| */ |
| if (s->be->options & PR_O_ABRT_CLOSE) { |
| buffer_auto_read(req); |
| buffer_auto_close(req); |
| } |
| else if (s->txn.meth == HTTP_METH_POST) { |
| /* POST requests may require to read extra CRLF |
| * sent by broken browsers and which could cause |
| * an RST to be sent upon close on some systems |
| * (eg: Linux). |
| */ |
| buffer_auto_read(req); |
| } |
| |
| return 0; |
| } |
| } |
| |
| missing_data: |
| /* stop waiting for data if the input is closed before the end */ |
| if (req->flags & BF_SHUTR) { |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_CLICL; |
| if (!(s->flags & SN_FINST_MASK)) { |
| if (txn->rsp.msg_state < HTTP_MSG_ERROR) |
| s->flags |= SN_FINST_H; |
| else |
| s->flags |= SN_FINST_D; |
| } |
| |
| s->fe->counters.cli_aborts++; |
| if (s->fe != s->be) |
| s->be->counters.cli_aborts++; |
| if (s->srv) |
| s->srv->counters.cli_aborts++; |
| |
| goto return_bad_req_stats_ok; |
| } |
| |
| /* waiting for the last bits to leave the buffer */ |
| if (req->flags & BF_SHUTW) |
| goto aborted_xfer; |
| |
| /* When TE: chunked is used, we need to get there again to parse remaining |
| * chunks even if the client has closed, so we don't want to set BF_DONTCLOSE. |
| */ |
| if (txn->flags & TX_REQ_TE_CHNK) |
| buffer_dont_close(req); |
| |
| http_silent_debug(__LINE__, s); |
| return 0; |
| |
| return_bad_req: /* let's centralize all bad requests */ |
| s->fe->counters.failed_req++; |
| if (s->listener->counters) |
| s->listener->counters->failed_req++; |
| return_bad_req_stats_ok: |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| if (txn->status) { |
| /* Note: we don't send any error if some data were already sent */ |
| stream_int_retnclose(req->prod, NULL); |
| } else { |
| txn->status = 400; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400)); |
| } |
| req->analysers = 0; |
| s->rep->analysers = 0; /* we're in data phase, we want to abort both directions */ |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_PRXCOND; |
| if (!(s->flags & SN_FINST_MASK)) { |
| if (txn->rsp.msg_state < HTTP_MSG_ERROR) |
| s->flags |= SN_FINST_H; |
| else |
| s->flags |= SN_FINST_D; |
| } |
| return 0; |
| |
| aborted_xfer: |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| if (txn->status) { |
| /* Note: we don't send any error if some data were already sent */ |
| stream_int_retnclose(req->prod, NULL); |
| } else { |
| txn->status = 502; |
| stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_502)); |
| } |
| req->analysers = 0; |
| s->rep->analysers = 0; /* we're in data phase, we want to abort both directions */ |
| |
| s->fe->counters.srv_aborts++; |
| if (s->fe != s->be) |
| s->be->counters.srv_aborts++; |
| if (s->srv) |
| s->srv->counters.srv_aborts++; |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_SRVCL; |
| if (!(s->flags & SN_FINST_MASK)) { |
| if (txn->rsp.msg_state < HTTP_MSG_ERROR) |
| s->flags |= SN_FINST_H; |
| else |
| s->flags |= SN_FINST_D; |
| } |
| return 0; |
| } |
| |
| /* This stream analyser waits for a complete HTTP response. It returns 1 if the |
| * processing can continue on next analysers, or zero if it either needs more |
| * data or wants to immediately abort the response (eg: timeout, error, ...). It |
| * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->rep->analysers |
| * when it has nothing left to do, and may remove any analyser when it wants to |
| * abort. |
| */ |
| int http_wait_for_response(struct session *s, struct buffer *rep, int an_bit) |
| { |
| struct http_txn *txn = &s->txn; |
| struct http_msg *msg = &txn->rsp; |
| struct hdr_ctx ctx; |
| int use_close_only; |
| int cur_idx; |
| int n; |
| |
| DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| rep, |
| rep->rex, rep->wex, |
| rep->flags, |
| rep->l, |
| rep->analysers); |
| |
| /* |
| * Now parse the partial (or complete) lines. |
| * We will check the response syntax, and also join multi-line |
| * headers. An index of all the lines will be elaborated while |
| * parsing. |
| * |
| * For the parsing, we use a 28 states FSM. |
| * |
| * Here is the information we currently have : |
| * rep->data + msg->som = beginning of response |
| * rep->data + msg->eoh = end of processed headers / start of current one |
| * msg->eol = end of current header or line (LF or CRLF) |
| * rep->lr = first non-visited byte |
| * rep->r = end of data |
| * Once we reach MSG_BODY, rep->sol = rep->data + msg->som |
| */ |
| |
| /* There's a protected area at the end of the buffer for rewriting |
| * purposes. We don't want to start to parse the request if the |
| * protected area is affected, because we may have to move processed |
| * data later, which is much more complicated. |
| */ |
| if (rep->l && msg->msg_state < HTTP_MSG_ERROR) { |
| if (unlikely((rep->flags & BF_FULL) || |
| rep->r < rep->lr || |
| rep->r > rep->data + rep->size - global.tune.maxrewrite)) { |
| if (rep->send_max) { |
| /* some data has still not left the buffer, wake us once that's done */ |
| if (rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) |
| goto abort_response; |
| buffer_dont_close(rep); |
| rep->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */ |
| return 0; |
| } |
| if (rep->l <= rep->size - global.tune.maxrewrite) |
| http_buffer_heavy_realign(rep, msg); |
| } |
| |
| if (likely(rep->lr < rep->r)) |
| http_msg_analyzer(rep, msg, &txn->hdr_idx); |
| } |
| |
| /* 1: we might have to print this header in debug mode */ |
| if (unlikely((global.mode & MODE_DEBUG) && |
| (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) && |
| msg->sol && |
| (msg->msg_state >= HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) { |
| char *eol, *sol; |
| |
| sol = rep->data + msg->som; |
| eol = sol + msg->sl.st.l; |
| debug_hdr("srvrep", s, sol, eol); |
| |
| sol += hdr_idx_first_pos(&txn->hdr_idx); |
| cur_idx = hdr_idx_first_idx(&txn->hdr_idx); |
| |
| while (cur_idx) { |
| eol = sol + txn->hdr_idx.v[cur_idx].len; |
| debug_hdr("srvhdr", s, sol, eol); |
| sol = eol + txn->hdr_idx.v[cur_idx].cr + 1; |
| cur_idx = txn->hdr_idx.v[cur_idx].next; |
| } |
| } |
| |
| /* |
| * Now we quickly check if we have found a full valid response. |
| * If not so, we check the FD and buffer states before leaving. |
| * A full response is indicated by the fact that we have seen |
| * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid |
| * responses are checked first. |
| * |
| * Depending on whether the client is still there or not, we |
| * may send an error response back or not. Note that normally |
| * we should only check for HTTP status there, and check I/O |
| * errors somewhere else. |
| */ |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) { |
| /* Invalid response */ |
| if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) { |
| /* we detected a parsing error. We want to archive this response |
| * in the dedicated proxy area for later troubleshooting. |
| */ |
| hdr_response_bad: |
| if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0) |
| http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe); |
| |
| s->be->counters.failed_resp++; |
| if (s->srv) { |
| s->srv->counters.failed_resp++; |
| health_adjust(s->srv, HANA_STATUS_HTTP_HDRRSP); |
| } |
| abort_response: |
| buffer_auto_close(rep); |
| rep->analysers = 0; |
| txn->status = 502; |
| rep->prod->flags |= SI_FL_NOLINGER; |
| buffer_ignore(rep, rep->l - rep->send_max); |
| stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502)); |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_PRXCOND; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_H; |
| |
| return 0; |
| } |
| |
| /* too large response does not fit in buffer. */ |
| else if (rep->flags & BF_FULL) { |
| goto hdr_response_bad; |
| } |
| |
| /* read error */ |
| else if (rep->flags & BF_READ_ERROR) { |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe); |
| |
| s->be->counters.failed_resp++; |
| if (s->srv) { |
| s->srv->counters.failed_resp++; |
| health_adjust(s->srv, HANA_STATUS_HTTP_READ_ERROR); |
| } |
| |
| buffer_auto_close(rep); |
| rep->analysers = 0; |
| txn->status = 502; |
| rep->prod->flags |= SI_FL_NOLINGER; |
| buffer_ignore(rep, rep->l - rep->send_max); |
| stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502)); |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_SRVCL; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_H; |
| return 0; |
| } |
| |
| /* read timeout : return a 504 to the client. */ |
| else if (rep->flags & BF_READ_TIMEOUT) { |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe); |
| |
| s->be->counters.failed_resp++; |
| if (s->srv) { |
| s->srv->counters.failed_resp++; |
| health_adjust(s->srv, HANA_STATUS_HTTP_READ_TIMEOUT); |
| } |
| |
| buffer_auto_close(rep); |
| rep->analysers = 0; |
| txn->status = 504; |
| rep->prod->flags |= SI_FL_NOLINGER; |
| buffer_ignore(rep, rep->l - rep->send_max); |
| stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_504)); |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_SRVTO; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_H; |
| return 0; |
| } |
| |
| /* close from server */ |
| else if (rep->flags & BF_SHUTR) { |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe); |
| |
| s->be->counters.failed_resp++; |
| if (s->srv) { |
| s->srv->counters.failed_resp++; |
| health_adjust(s->srv, HANA_STATUS_HTTP_BROKEN_PIPE); |
| } |
| |
| buffer_auto_close(rep); |
| rep->analysers = 0; |
| txn->status = 502; |
| rep->prod->flags |= SI_FL_NOLINGER; |
| buffer_ignore(rep, rep->l - rep->send_max); |
| stream_int_retnclose(rep->cons, error_message(s, HTTP_ERR_502)); |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_SRVCL; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_H; |
| return 0; |
| } |
| |
| /* write error to client (we don't send any message then) */ |
| else if (rep->flags & BF_WRITE_ERROR) { |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe); |
| |
| s->be->counters.failed_resp++; |
| rep->analysers = 0; |
| buffer_auto_close(rep); |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_CLICL; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_H; |
| |
| /* process_session() will take care of the error */ |
| return 0; |
| } |
| |
| buffer_dont_close(rep); |
| return 0; |
| } |
| |
| /* More interesting part now : we know that we have a complete |
| * response which at least looks like HTTP. We have an indicator |
| * of each header's length, so we can parse them quickly. |
| */ |
| |
| if (unlikely(msg->err_pos >= 0)) |
| http_capture_bad_message(&s->be->invalid_rep, s, rep, msg, msg->msg_state, s->fe); |
| |
| /* |
| * 1: get the status code |
| */ |
| n = msg->sol[msg->sl.st.c] - '0'; |
| if (n < 1 || n > 5) |
| n = 0; |
| /* when the client triggers a 4xx from the server, it's most often due |
| * to a missing object or permission. These events should be tracked |
| * because if they happen often, it may indicate a brute force or a |
| * vulnerability scan. |
| */ |
| if (n == 4) |
| session_inc_http_err_ctr(s); |
| |
| if (s->srv) |
| s->srv->counters.p.http.rsp[n]++; |
| |
| /* check if the response is HTTP/1.1 or above */ |
| if ((msg->sl.st.v_l == 8) && |
| ((msg->sol[5] > '1') || |
| ((msg->sol[5] == '1') && |
| (msg->sol[7] >= '1')))) |
| txn->flags |= TX_RES_VER_11; |
| |
| /* "connection" has not been parsed yet */ |
| txn->flags &= ~(TX_HDR_CONN_PRS|TX_HDR_CONN_CLO|TX_HDR_CONN_KAL|TX_CON_CLO_SET|TX_CON_KAL_SET); |
| |
| /* transfer length unknown*/ |
| txn->flags &= ~TX_RES_XFER_LEN; |
| |
| txn->status = strl2ui(msg->sol + msg->sl.st.c, msg->sl.st.c_l); |
| |
| /* Adjust server's health based on status code. Note: status codes 501 |
| * and 505 are triggered on demand by client request, so we must not |
| * count them as server failures. |
| */ |
| if (s->srv) { |
| if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505)) |
| health_adjust(s->srv, HANA_STATUS_HTTP_OK); |
| else |
| health_adjust(s->srv, HANA_STATUS_HTTP_STS); |
| } |
| |
| /* |
| * 2: check for cacheability. |
| */ |
| |
| switch (txn->status) { |
| case 200: |
| case 203: |
| case 206: |
| case 300: |
| case 301: |
| case 410: |
| /* RFC2616 @13.4: |
| * "A response received with a status code of |
| * 200, 203, 206, 300, 301 or 410 MAY be stored |
| * by a cache (...) unless a cache-control |
| * directive prohibits caching." |
| * |
| * RFC2616 @9.5: POST method : |
| * "Responses to this method are not cacheable, |
| * unless the response includes appropriate |
| * Cache-Control or Expires header fields." |
| */ |
| if (likely(txn->meth != HTTP_METH_POST) && |
| (s->be->options & (PR_O_CHK_CACHE|PR_O_COOK_NOC))) |
| txn->flags |= TX_CACHEABLE | TX_CACHE_COOK; |
| break; |
| default: |
| break; |
| } |
| |
| /* |
| * 3: we may need to capture headers |
| */ |
| s->logs.logwait &= ~LW_RESP; |
| if (unlikely((s->logs.logwait & LW_RSPHDR) && s->fe->rsp_cap)) |
| capture_headers(msg->sol, &txn->hdr_idx, |
| txn->rsp.cap, s->fe->rsp_cap); |
| |
| /* 4: determine the transfer-length. |
| * According to RFC2616 #4.4, amended by the HTTPbis working group, |
| * the presence of a message-body in a RESPONSE and its transfer length |
| * must be determined that way : |
| * |
| * All responses to the HEAD request method MUST NOT include a |
| * message-body, even though the presence of entity-header fields |
| * might lead one to believe they do. All 1xx (informational), 204 |
| * (No Content), and 304 (Not Modified) responses MUST NOT include a |
| * message-body. All other responses do include a message-body, |
| * although it MAY be of zero length. |
| * |
| * 1. Any response which "MUST NOT" include a message-body (such as the |
| * 1xx, 204 and 304 responses and any response to a HEAD request) is |
| * always terminated by the first empty line after the header fields, |
| * regardless of the entity-header fields present in the message. |
| * |
| * 2. If a Transfer-Encoding header field (Section 9.7) is present and |
| * the "chunked" transfer-coding (Section 6.2) is used, the |
| * transfer-length is defined by the use of this transfer-coding. |
| * If a Transfer-Encoding header field is present and the "chunked" |
| * transfer-coding is not present, the transfer-length is defined by |
| * the sender closing the connection. |
| * |
| * 3. If a Content-Length header field is present, its decimal value in |
| * OCTETs represents both the entity-length and the transfer-length. |
| * If a message is received with both a Transfer-Encoding header |
| * field and a Content-Length header field, the latter MUST be ignored. |
| * |
| * 4. If the message uses the media type "multipart/byteranges", and |
| * the transfer-length is not otherwise specified, then this self- |
| * delimiting media type defines the transfer-length. This media |
| * type MUST NOT be used unless the sender knows that the recipient |
| * can parse it; the presence in a request of a Range header with |
| * multiple byte-range specifiers from a 1.1 client implies that the |
| * client can parse multipart/byteranges responses. |
| * |
| * 5. By the server closing the connection. |
| */ |
| |
| /* Skip parsing if no content length is possible. The response flags |
| * remain 0 as well as the hdr_content_len, which may or may not mirror |
| * the real header value, and we note that we know the response's length. |
| * FIXME: should we parse anyway and return an error on chunked encoding ? |
| */ |
| if (txn->meth == HTTP_METH_HEAD || |
| (txn->status >= 100 && txn->status < 200) || |
| txn->status == 204 || txn->status == 304) { |
| txn->flags |= TX_RES_XFER_LEN; |
| goto skip_content_length; |
| } |
| |
| use_close_only = 0; |
| ctx.idx = 0; |
| while ((txn->flags & TX_RES_VER_11) && |
| http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) { |
| if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0) |
| txn->flags |= (TX_RES_TE_CHNK | TX_RES_XFER_LEN); |
| else if (txn->flags & TX_RES_TE_CHNK) { |
| /* bad transfer-encoding (chunked followed by something else) */ |
| use_close_only = 1; |
| txn->flags &= ~(TX_RES_TE_CHNK | TX_RES_XFER_LEN); |
| break; |
| } |
| } |
| |
| /* FIXME: below we should remove the content-length header(s) in case of chunked encoding */ |
| ctx.idx = 0; |
| while (!(txn->flags & TX_RES_TE_CHNK) && !use_close_only && |
| http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) { |
| signed long long cl; |
| |
| if (!ctx.vlen) |
| goto hdr_response_bad; |
| |
| if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl)) |
| goto hdr_response_bad; /* parse failure */ |
| |
| if (cl < 0) |
| goto hdr_response_bad; |
| |
| if ((txn->flags & TX_RES_CNT_LEN) && (msg->hdr_content_len != cl)) |
| goto hdr_response_bad; /* already specified, was different */ |
| |
| txn->flags |= TX_RES_CNT_LEN | TX_RES_XFER_LEN; |
| msg->hdr_content_len = cl; |
| } |
| |
| /* FIXME: we should also implement the multipart/byterange method. |
| * For now on, we resort to close mode in this case (unknown length). |
| */ |
| skip_content_length: |
| |
| /* end of job, return OK */ |
| rep->analysers &= ~an_bit; |
| rep->analyse_exp = TICK_ETERNITY; |
| buffer_auto_close(rep); |
| return 1; |
| } |
| |
| /* This function performs all the processing enabled for the current response. |
| * It normally returns 1 unless it wants to break. It relies on buffers flags, |
| * and updates t->rep->analysers. It might make sense to explode it into several |
| * other functions. It works like process_request (see indications above). |
| */ |
| int http_process_res_common(struct session *t, struct buffer *rep, int an_bit, struct proxy *px) |
| { |
| struct http_txn *txn = &t->txn; |
| struct http_msg *msg = &txn->rsp; |
| struct proxy *cur_proxy; |
| struct cond_wordlist *wl; |
| |
| DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| t, |
| rep, |
| rep->rex, rep->wex, |
| rep->flags, |
| rep->l, |
| rep->analysers); |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */ |
| return 0; |
| |
| rep->analysers &= ~an_bit; |
| rep->analyse_exp = TICK_ETERNITY; |
| |
| /* Now we have to check if we need to modify the Connection header. |
| * This is more difficult on the response than it is on the request, |
| * because we can have two different HTTP versions and we don't know |
| * how the client will interprete a response. For instance, let's say |
| * that the client sends a keep-alive request in HTTP/1.0 and gets an |
| * HTTP/1.1 response without any header. Maybe it will bound itself to |
| * HTTP/1.0 because it only knows about it, and will consider the lack |
| * of header as a close, or maybe it knows HTTP/1.1 and can consider |
| * the lack of header as a keep-alive. Thus we will use two flags |
| * indicating how a request MAY be understood by the client. In case |
| * of multiple possibilities, we'll fix the header to be explicit. If |
| * ambiguous cases such as both close and keepalive are seen, then we |
| * will fall back to explicit close. Note that we won't take risks with |
| * HTTP/1.0 clients which may not necessarily understand keep-alive. |
| * See doc/internals/connection-header.txt for the complete matrix. |
| */ |
| |
| if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) || |
| txn->status == 101)) { |
| /* Either we've established an explicit tunnel, or we're |
| * switching the protocol. In both cases, we're very unlikely |
| * to understand the next protocols. We have to switch to tunnel |
| * mode, so that we transfer the request and responses then let |
| * this protocol pass unmodified. When we later implement specific |
| * parsers for such protocols, we'll want to check the Upgrade |
| * header which contains information about that protocol for |
| * responses with status 101 (eg: see RFC2817 about TLS). |
| */ |
| txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_TUN; |
| } |
| else if ((txn->status >= 200) && !(txn->flags & TX_HDR_CONN_PRS) && |
| ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN || |
| ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE))) { |
| int to_del = 0; |
| |
| /* on unknown transfer length, we must close */ |
| if (!(txn->flags & TX_RES_XFER_LEN) && |
| (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) |
| txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO; |
| |
| /* now adjust header transformations depending on current state */ |
| if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN || |
| (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) { |
| to_del |= 2; /* remove "keep-alive" on any response */ |
| if (!(txn->flags & TX_RES_VER_11)) |
| to_del |= 1; /* remove "close" for HTTP/1.0 responses */ |
| } |
| else { /* SCL / KAL */ |
| to_del |= 1; /* remove "close" on any response */ |
| if ((txn->flags & (TX_RES_VER_11|TX_REQ_VER_11)) == (TX_RES_VER_11|TX_REQ_VER_11)) |
| to_del |= 2; /* remove "keep-alive" on pure 1.1 responses */ |
| } |
| |
| /* Parse and remove some headers from the connection header */ |
| http_parse_connection_header(txn, msg, rep, to_del); |
| |
| /* Some keep-alive responses are converted to Server-close if |
| * the server wants to close. |
| */ |
| if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL) { |
| if ((txn->flags & TX_HDR_CONN_CLO) || |
| (txn->flags & (TX_HDR_CONN_KAL|TX_RES_VER_11)) == 0) |
| txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_SCL; |
| } |
| } |
| |
| if (1) { |
| /* |
| * 3: we will have to evaluate the filters. |
| * As opposed to version 1.2, now they will be evaluated in the |
| * filters order and not in the header order. This means that |
| * each filter has to be validated among all headers. |
| * |
| * Filters are tried with ->be first, then with ->fe if it is |
| * different from ->be. |
| */ |
| |
| cur_proxy = t->be; |
| while (1) { |
| struct proxy *rule_set = cur_proxy; |
| |
| /* try headers filters */ |
| if (rule_set->rsp_exp != NULL) { |
| if (apply_filters_to_response(t, rep, rule_set) < 0) { |
| return_bad_resp: |
| if (t->srv) { |
| t->srv->counters.failed_resp++; |
| health_adjust(t->srv, HANA_STATUS_HTTP_RSP); |
| } |
| cur_proxy->counters.failed_resp++; |
| return_srv_prx_502: |
| rep->analysers = 0; |
| txn->status = 502; |
| rep->prod->flags |= SI_FL_NOLINGER; |
| buffer_ignore(rep, rep->l - rep->send_max); |
| stream_int_retnclose(rep->cons, error_message(t, HTTP_ERR_502)); |
| if (!(t->flags & SN_ERR_MASK)) |
| t->flags |= SN_ERR_PRXCOND; |
| if (!(t->flags & SN_FINST_MASK)) |
| t->flags |= SN_FINST_H; |
| return 0; |
| } |
| } |
| |
| /* has the response been denied ? */ |
| if (txn->flags & TX_SVDENY) { |
| if (t->srv) |
| t->srv->counters.failed_secu++; |
| |
| cur_proxy->counters.denied_resp++; |
| if (t->listener->counters) |
| t->listener->counters->denied_resp++; |
| |
| goto return_srv_prx_502; |
| } |
| |
| /* add response headers from the rule sets in the same order */ |
| list_for_each_entry(wl, &rule_set->rsp_add, list) { |
| if (txn->status < 200) |
| break; |
| if (wl->cond) { |
| int ret = acl_exec_cond(wl->cond, px, t, txn, ACL_DIR_RTR); |
| ret = acl_pass(ret); |
| if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| if (!ret) |
| continue; |
| } |
| if (unlikely(http_header_add_tail(rep, &txn->rsp, &txn->hdr_idx, wl->s) < 0)) |
| goto return_bad_resp; |
| } |
| |
| /* check whether we're already working on the frontend */ |
| if (cur_proxy == t->fe) |
| break; |
| cur_proxy = t->fe; |
| } |
| |
| /* |
| * We may be facing a 100-continue response, in which case this |
| * is not the right response, and we're waiting for the next one. |
| * Let's allow this response to go to the client and wait for the |
| * next one. |
| */ |
| if (unlikely(txn->status == 100)) { |
| hdr_idx_init(&txn->hdr_idx); |
| buffer_forward(rep, rep->lr - msg->sol); |
| msg->msg_state = HTTP_MSG_RPBEFORE; |
| txn->status = 0; |
| rep->analysers |= AN_RES_WAIT_HTTP | an_bit; |
| return 1; |
| } |
| else if (unlikely(txn->status < 200)) |
| goto skip_header_mangling; |
| |
| /* we don't have any 1xx status code now */ |
| |
| /* |
| * 4: check for server cookie. |
| */ |
| if (t->be->cookie_name || t->be->appsession_name || t->fe->capture_name || |
| (t->be->options & PR_O_CHK_CACHE)) |
| manage_server_side_cookies(t, rep); |
| |
| |
| /* |
| * 5: check for cache-control or pragma headers if required. |
| */ |
| if ((t->be->options & (PR_O_COOK_NOC | PR_O_CHK_CACHE)) != 0) |
| check_response_for_cacheability(t, rep); |
| |
| /* |
| * 6: add server cookie in the response if needed |
| */ |
| if ((t->srv) && (t->be->options & PR_O_COOK_INS) && |
| !((txn->flags & TX_SCK_FOUND) && (t->be->options2 & PR_O2_COOK_PSV)) && |
| (!(t->flags & SN_DIRECT) || |
| ((t->be->cookie_maxidle || txn->cookie_last_date) && |
| (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) || |
| (t->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date |
| (!t->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date |
| (!(t->be->options & PR_O_COOK_POST) || (txn->meth == HTTP_METH_POST)) && |
| !(t->flags & SN_IGNORE_PRST)) { |
| int len; |
| /* the server is known, it's not the one the client requested, or the |
| * cookie's last seen date needs to be refreshed. We have to |
| * insert a set-cookie here, except if we want to insert only on POST |
| * requests and this one isn't. Note that servers which don't have cookies |
| * (eg: some backup servers) will return a full cookie removal request. |
| */ |
| if (!t->srv->cookie) { |
| len = sprintf(trash, |
| "Set-Cookie: %s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/", |
| t->be->cookie_name); |
| } |
| else { |
| len = sprintf(trash, "Set-Cookie: %s=%s", t->be->cookie_name, t->srv->cookie); |
| |
| if (t->be->cookie_maxidle || t->be->cookie_maxlife) { |
| /* emit last_date, which is mandatory */ |
| trash[len++] = COOKIE_DELIM_DATE; |
| s30tob64((date.tv_sec+3) >> 2, trash + len); len += 5; |
| if (t->be->cookie_maxlife) { |
| /* emit first_date, which is either the original one or |
| * the current date. |
| */ |
| trash[len++] = COOKIE_DELIM_DATE; |
| s30tob64(txn->cookie_first_date ? |
| txn->cookie_first_date >> 2 : |
| (date.tv_sec+3) >> 2, trash + len); |
| len += 5; |
| } |
| } |
| len += sprintf(trash + len, "; path=/"); |
| } |
| |
| if (t->be->cookie_domain) |
| len += sprintf(trash+len, "; domain=%s", t->be->cookie_domain); |
| |
| if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx, |
| trash, len) < 0)) |
| goto return_bad_resp; |
| |
| txn->flags &= ~TX_SCK_MASK; |
| if (t->srv->cookie && (t->flags & SN_DIRECT)) |
| /* the server did not change, only the date was updated */ |
| txn->flags |= TX_SCK_UPDATED; |
| else |
| txn->flags |= TX_SCK_INSERTED; |
| |
| /* Here, we will tell an eventual cache on the client side that we don't |
| * want it to cache this reply because HTTP/1.0 caches also cache cookies ! |
| * Some caches understand the correct form: 'no-cache="set-cookie"', but |
| * others don't (eg: apache <= 1.3.26). So we use 'private' instead. |
| */ |
| if ((t->be->options & PR_O_COOK_NOC) && (txn->flags & TX_CACHEABLE)) { |
| |
| txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK; |
| |
| if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx, |
| "Cache-control: private", 22) < 0)) |
| goto return_bad_resp; |
| } |
| } |
| |
| /* |
| * 7: check if result will be cacheable with a cookie. |
| * We'll block the response if security checks have caught |
| * nasty things such as a cacheable cookie. |
| */ |
| if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) == |
| (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) && |
| (t->be->options & PR_O_CHK_CACHE)) { |
| |
| /* we're in presence of a cacheable response containing |
| * a set-cookie header. We'll block it as requested by |
| * the 'checkcache' option, and send an alert. |
| */ |
| if (t->srv) |
| t->srv->counters.failed_secu++; |
| |
| cur_proxy->counters.denied_resp++; |
| if (t->listener->counters) |
| t->listener->counters->denied_resp++; |
| |
| Alert("Blocking cacheable cookie in response from instance %s, server %s.\n", |
| t->be->id, t->srv?t->srv->id:"<dispatch>"); |
| send_log(t->be, LOG_ALERT, |
| "Blocking cacheable cookie in response from instance %s, server %s.\n", |
| t->be->id, t->srv?t->srv->id:"<dispatch>"); |
| goto return_srv_prx_502; |
| } |
| |
| /* |
| * 8: adjust "Connection: close" or "Connection: keep-alive" if needed. |
| */ |
| if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) || |
| ((t->fe->options|t->be->options) & PR_O_HTTP_CLOSE)) { |
| unsigned int want_flags = 0; |
| |
| if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL || |
| (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) { |
| /* we want a keep-alive response here. Keep-alive header |
| * required if either side is not 1.1. |
| */ |
| if ((txn->flags & (TX_REQ_VER_11|TX_RES_VER_11)) != (TX_REQ_VER_11|TX_RES_VER_11)) |
| want_flags |= TX_CON_KAL_SET; |
| } |
| else { |
| /* we want a close response here. Close header required if |
| * the server is 1.1, regardless of the client. |
| */ |
| if (txn->flags & TX_RES_VER_11) |
| want_flags |= TX_CON_CLO_SET; |
| } |
| |
| if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET))) |
| http_change_connection_header(txn, msg, rep, want_flags); |
| } |
| |
| skip_header_mangling: |
| if ((txn->flags & TX_RES_XFER_LEN) || |
| (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN) |
| rep->analysers |= AN_RES_HTTP_XFER_BODY; |
| |
| /************************************************************* |
| * OK, that's finished for the headers. We have done what we * |
| * could. Let's switch to the DATA state. * |
| ************************************************************/ |
| |
| t->logs.t_data = tv_ms_elapsed(&t->logs.tv_accept, &now); |
| |
| /* if the user wants to log as soon as possible, without counting |
| * bytes from the server, then this is the right moment. We have |
| * to temporarily assign bytes_out to log what we currently have. |
| */ |
| if (t->fe->to_log && !(t->logs.logwait & LW_BYTES)) { |
| t->logs.t_close = t->logs.t_data; /* to get a valid end date */ |
| t->logs.bytes_out = txn->rsp.eoh; |
| t->do_log(t); |
| t->logs.bytes_out = 0; |
| } |
| |
| /* Note: we must not try to cheat by jumping directly to DATA, |
| * otherwise we would not let the client side wake up. |
| */ |
| |
| return 1; |
| } |
| return 1; |
| } |
| |
| /* This function is an analyser which forwards response body (including chunk |
| * sizes if any). It is called as soon as we must forward, even if we forward |
| * zero byte. The only situation where it must not be called is when we're in |
| * tunnel mode and we want to forward till the close. It's used both to forward |
| * remaining data and to resync after end of body. It expects the msg_state to |
| * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to |
| * read more data, or 1 once we can go on with next request or end the session. |
| * When in MSG_DATA or MSG_TRAILERS, it will automatically forward hdr_content_len |
| * bytes of pending data + the headers if not already done (between som and sov). |
| * It eventually adjusts som to match sov after the data in between have been sent. |
| */ |
| int http_response_forward_body(struct session *s, struct buffer *res, int an_bit) |
| { |
| struct http_txn *txn = &s->txn; |
| struct http_msg *msg = &s->txn.rsp; |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) |
| return 0; |
| |
| if ((res->flags & (BF_READ_ERROR|BF_READ_TIMEOUT|BF_WRITE_ERROR|BF_WRITE_TIMEOUT)) || |
| ((res->flags & BF_SHUTW) && (res->to_forward || res->send_max)) || |
| !s->req->analysers) { |
| /* Output closed while we were sending data. We must abort and |
| * wake the other side up. |
| */ |
| msg->msg_state = HTTP_MSG_ERROR; |
| http_resync_states(s); |
| return 1; |
| } |
| |
| /* in most states, we should abort in case of early close */ |
| buffer_auto_close(res); |
| |
| if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) { |
| /* we have msg->col and msg->sov which both point to the first |
| * byte of message body. msg->som still points to the beginning |
| * of the message. We must save the body in req->lr because it |
| * survives buffer re-alignments. |
| */ |
| res->lr = res->data + msg->sov; |
| if (txn->flags & TX_RES_TE_CHNK) |
| msg->msg_state = HTTP_MSG_CHUNK_SIZE; |
| else { |
| msg->msg_state = HTTP_MSG_DATA; |
| } |
| } |
| |
| while (1) { |
| http_silent_debug(__LINE__, s); |
| /* we may have some data pending */ |
| if (msg->hdr_content_len || msg->som != msg->sov) { |
| int bytes = msg->sov - msg->som; |
| if (bytes < 0) /* sov may have wrapped at the end */ |
| bytes += res->size; |
| buffer_forward(res, bytes + msg->hdr_content_len); |
| msg->hdr_content_len = 0; /* don't forward that again */ |
| msg->som = msg->sov; |
| } |
| |
| if (msg->msg_state == HTTP_MSG_DATA) { |
| /* must still forward */ |
| if (res->to_forward) |
| goto missing_data; |
| |
| /* nothing left to forward */ |
| if (txn->flags & TX_RES_TE_CHNK) |
| msg->msg_state = HTTP_MSG_DATA_CRLF; |
| else |
| msg->msg_state = HTTP_MSG_DONE; |
| } |
| else if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) { |
| /* read the chunk size and assign it to ->hdr_content_len, then |
| * set ->sov to point to the body and switch to DATA or TRAILERS state. |
| */ |
| int ret = http_parse_chunk_size(res, msg); |
| |
| if (!ret) |
| goto missing_data; |
| else if (ret < 0) { |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->be->invalid_rep, s, res, msg, HTTP_MSG_CHUNK_SIZE, s->fe); |
| goto return_bad_res; |
| } |
| /* otherwise we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state */ |
| /* Don't set a PUSH at the end of that chunk if it's not the last one */ |
| if (msg->msg_state == HTTP_MSG_DATA) |
| res->flags |= BF_EXPECT_MORE; |
| } |
| else if (msg->msg_state == HTTP_MSG_DATA_CRLF) { |
| /* we want the CRLF after the data */ |
| int ret; |
| |
| res->lr = res->w + res->send_max; |
| if (res->lr >= res->data + res->size) |
| res->lr -= res->size; |
| |
| ret = http_skip_chunk_crlf(res, msg); |
| |
| if (!ret) |
| goto missing_data; |
| else if (ret < 0) { |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->be->invalid_rep, s, res, msg, HTTP_MSG_DATA_CRLF, s->fe); |
| goto return_bad_res; |
| } |
| /* we're in MSG_CHUNK_SIZE now */ |
| } |
| else if (msg->msg_state == HTTP_MSG_TRAILERS) { |
| int ret = http_forward_trailers(res, msg); |
| |
| if (ret == 0) |
| goto missing_data; |
| else if (ret < 0) { |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->be->invalid_rep, s, res, msg, HTTP_MSG_TRAILERS, s->fe); |
| goto return_bad_res; |
| } |
| /* we're in HTTP_MSG_DONE now */ |
| } |
| else { |
| int old_state = msg->msg_state; |
| |
| /* other states, DONE...TUNNEL */ |
| /* for keep-alive we don't want to forward closes on DONE */ |
| if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL || |
| (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) |
| buffer_dont_close(res); |
| if (http_resync_states(s)) { |
| http_silent_debug(__LINE__, s); |
| /* some state changes occurred, maybe the analyser |
| * was disabled too. |
| */ |
| if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) { |
| if (res->flags & BF_SHUTW) { |
| /* response errors are most likely due to |
| * the client aborting the transfer. |
| */ |
| goto aborted_xfer; |
| } |
| if (msg->err_pos >= 0) |
| http_capture_bad_message(&s->be->invalid_rep, s, res, msg, old_state, s->fe); |
| goto return_bad_res; |
| } |
| return 1; |
| } |
| return 0; |
| } |
| } |
| |
| missing_data: |
| /* stop waiting for data if the input is closed before the end */ |
| if (res->flags & BF_SHUTR) { |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_SRVCL; |
| s->be->counters.srv_aborts++; |
| if (s->srv) |
| s->srv->counters.srv_aborts++; |
| goto return_bad_res_stats_ok; |
| } |
| |
| if (res->flags & BF_SHUTW) |
| goto aborted_xfer; |
| |
| /* we need to obey the req analyser, so if it leaves, we must too */ |
| if (!s->req->analysers) |
| goto return_bad_res; |
| |
| /* forward the chunk size as well as any pending data */ |
| if (msg->hdr_content_len || msg->som != msg->sov) { |
| buffer_forward(res, msg->sov - msg->som + msg->hdr_content_len); |
| msg->hdr_content_len = 0; /* don't forward that again */ |
| msg->som = msg->sov; |
| } |
| |
| /* When TE: chunked is used, we need to get there again to parse remaining |
| * chunks even if the server has closed, so we don't want to set BF_DONTCLOSE. |
| * Similarly, with keep-alive on the client side, we don't want to forward a |
| * close. |
| */ |
| if ((txn->flags & TX_RES_TE_CHNK) || |
| (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL || |
| (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) |
| buffer_dont_close(res); |
| |
| /* the session handler will take care of timeouts and errors */ |
| http_silent_debug(__LINE__, s); |
| return 0; |
| |
| return_bad_res: /* let's centralize all bad responses */ |
| s->be->counters.failed_resp++; |
| if (s->srv) |
| s->srv->counters.failed_resp++; |
| |
| return_bad_res_stats_ok: |
| txn->rsp.msg_state = HTTP_MSG_ERROR; |
| /* don't send any error message as we're in the body */ |
| stream_int_retnclose(res->cons, NULL); |
| res->analysers = 0; |
| s->req->analysers = 0; /* we're in data phase, we want to abort both directions */ |
| if (s->srv) |
| health_adjust(s->srv, HANA_STATUS_HTTP_HDRRSP); |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_PRXCOND; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_D; |
| return 0; |
| |
| aborted_xfer: |
| txn->rsp.msg_state = HTTP_MSG_ERROR; |
| /* don't send any error message as we're in the body */ |
| stream_int_retnclose(res->cons, NULL); |
| res->analysers = 0; |
| s->req->analysers = 0; /* we're in data phase, we want to abort both directions */ |
| |
| s->fe->counters.cli_aborts++; |
| if (s->fe != s->be) |
| s->be->counters.cli_aborts++; |
| if (s->srv) |
| s->srv->counters.cli_aborts++; |
| |
| if (!(s->flags & SN_ERR_MASK)) |
| s->flags |= SN_ERR_CLICL; |
| if (!(s->flags & SN_FINST_MASK)) |
| s->flags |= SN_FINST_D; |
| return 0; |
| } |
| |
| /* Iterate the same filter through all request headers. |
| * Returns 1 if this filter can be stopped upon return, otherwise 0. |
| * Since it can manage the switch to another backend, it updates the per-proxy |
| * DENY stats. |
| */ |
| int apply_filter_to_req_headers(struct session *t, struct buffer *req, struct hdr_exp *exp) |
| { |
| char term; |
| char *cur_ptr, *cur_end, *cur_next; |
| int cur_idx, old_idx, last_hdr; |
| struct http_txn *txn = &t->txn; |
| struct hdr_idx_elem *cur_hdr; |
| int len, delta; |
| |
| last_hdr = 0; |
| |
| cur_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx); |
| old_idx = 0; |
| |
| while (!last_hdr) { |
| if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT))) |
| return 1; |
| else if (unlikely(txn->flags & TX_CLALLOW) && |
| (exp->action == ACT_ALLOW || |
| exp->action == ACT_DENY || |
| exp->action == ACT_TARPIT)) |
| return 0; |
| |
| cur_idx = txn->hdr_idx.v[old_idx].next; |
| if (!cur_idx) |
| break; |
| |
| cur_hdr = &txn->hdr_idx.v[cur_idx]; |
| cur_ptr = cur_next; |
| cur_end = cur_ptr + cur_hdr->len; |
| cur_next = cur_end + cur_hdr->cr + 1; |
| |
| /* Now we have one header between cur_ptr and cur_end, |
| * and the next header starts at cur_next. |
| */ |
| |
| /* The annoying part is that pattern matching needs |
| * that we modify the contents to null-terminate all |
| * strings before testing them. |
| */ |
| |
| term = *cur_end; |
| *cur_end = '\0'; |
| |
| if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) { |
| switch (exp->action) { |
| case ACT_SETBE: |
| /* It is not possible to jump a second time. |
| * FIXME: should we return an HTTP/500 here so that |
| * the admin knows there's a problem ? |
| */ |
| if (t->be != t->fe) |
| break; |
| |
| /* Swithing Proxy */ |
| session_set_backend(t, (struct proxy *)exp->replace); |
| last_hdr = 1; |
| break; |
| |
| case ACT_ALLOW: |
| txn->flags |= TX_CLALLOW; |
| last_hdr = 1; |
| break; |
| |
| case ACT_DENY: |
| txn->flags |= TX_CLDENY; |
| last_hdr = 1; |
| |
| t->be->counters.denied_req++; |
| if (t->listener->counters) |
| t->listener->counters->denied_req++; |
| |
| break; |
| |
| case ACT_TARPIT: |
| txn->flags |= TX_CLTARPIT; |
| last_hdr = 1; |
| |
| t->be->counters.denied_req++; |
| if (t->listener->counters) |
| t->listener->counters->denied_req++; |
| |
| break; |
| |
| case ACT_REPLACE: |
| len = exp_replace(trash, cur_ptr, exp->replace, pmatch); |
| delta = buffer_replace2(req, cur_ptr, cur_end, trash, len); |
| /* FIXME: if the user adds a newline in the replacement, the |
| * index will not be recalculated for now, and the new line |
| * will not be counted as a new header. |
| */ |
| |
| cur_end += delta; |
| cur_next += delta; |
| cur_hdr->len += delta; |
| http_msg_move_end(&txn->req, delta); |
| break; |
| |
| case ACT_REMOVE: |
| delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0); |
| cur_next += delta; |
| |
| http_msg_move_end(&txn->req, delta); |
| txn->hdr_idx.v[old_idx].next = cur_hdr->next; |
| txn->hdr_idx.used--; |
| cur_hdr->len = 0; |
| cur_end = NULL; /* null-term has been rewritten */ |
| cur_idx = old_idx; |
| break; |
| |
| } |
| } |
| if (cur_end) |
| *cur_end = term; /* restore the string terminator */ |
| |
| /* keep the link from this header to next one in case of later |
| * removal of next header. |
| */ |
| old_idx = cur_idx; |
| } |
| return 0; |
| } |
| |
| |
| /* Apply the filter to the request line. |
| * Returns 0 if nothing has been done, 1 if the filter has been applied, |
| * or -1 if a replacement resulted in an invalid request line. |
| * Since it can manage the switch to another backend, it updates the per-proxy |
| * DENY stats. |
| */ |
| int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp) |
| { |
| char term; |
| char *cur_ptr, *cur_end; |
| int done; |
| struct http_txn *txn = &t->txn; |
| int len, delta; |
| |
| |
| if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT))) |
| return 1; |
| else if (unlikely(txn->flags & TX_CLALLOW) && |
| (exp->action == ACT_ALLOW || |
| exp->action == ACT_DENY || |
| exp->action == ACT_TARPIT)) |
| return 0; |
| else if (exp->action == ACT_REMOVE) |
| return 0; |
| |
| done = 0; |
| |
| cur_ptr = txn->req.sol; |
| cur_end = cur_ptr + txn->req.sl.rq.l; |
| |
| /* Now we have the request line between cur_ptr and cur_end */ |
| |
| /* The annoying part is that pattern matching needs |
| * that we modify the contents to null-terminate all |
| * strings before testing them. |
| */ |
| |
| term = *cur_end; |
| *cur_end = '\0'; |
| |
| if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) { |
| switch (exp->action) { |
| case ACT_SETBE: |
| /* It is not possible to jump a second time. |
| * FIXME: should we return an HTTP/500 here so that |
| * the admin knows there's a problem ? |
| */ |
| if (t->be != t->fe) |
| break; |
| |
| /* Swithing Proxy */ |
| session_set_backend(t, (struct proxy *)exp->replace); |
| done = 1; |
| break; |
| |
| case ACT_ALLOW: |
| txn->flags |= TX_CLALLOW; |
| done = 1; |
| break; |
| |
| case ACT_DENY: |
| txn->flags |= TX_CLDENY; |
| |
| t->be->counters.denied_req++; |
| if (t->listener->counters) |
| t->listener->counters->denied_req++; |
| |
| done = 1; |
| break; |
| |
| case ACT_TARPIT: |
| txn->flags |= TX_CLTARPIT; |
| |
| t->be->counters.denied_req++; |
| if (t->listener->counters) |
| t->listener->counters->denied_req++; |
| |
| done = 1; |
| break; |
| |
| case ACT_REPLACE: |
| *cur_end = term; /* restore the string terminator */ |
| len = exp_replace(trash, cur_ptr, exp->replace, pmatch); |
| delta = buffer_replace2(req, cur_ptr, cur_end, trash, len); |
| /* FIXME: if the user adds a newline in the replacement, the |
| * index will not be recalculated for now, and the new line |
| * will not be counted as a new header. |
| */ |
| |
| http_msg_move_end(&txn->req, delta); |
| cur_end += delta; |
| cur_end = (char *)http_parse_reqline(&txn->req, req->data, |
| HTTP_MSG_RQMETH, |
| cur_ptr, cur_end + 1, |
| NULL, NULL); |
| if (unlikely(!cur_end)) |
| return -1; |
| |
| /* we have a full request and we know that we have either a CR |
| * or an LF at <ptr>. |
| */ |
| txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l); |
| hdr_idx_set_start(&txn->hdr_idx, txn->req.sl.rq.l, *cur_end == '\r'); |
| /* there is no point trying this regex on headers */ |
| return 1; |
| } |
| } |
| *cur_end = term; /* restore the string terminator */ |
| return done; |
| } |
| |
| |
| |
| /* |
| * Apply all the req filters of proxy <px> to all headers in buffer <req> of session <s>. |
| * Returns 0 if everything is alright, or -1 in case a replacement lead to an |
| * unparsable request. Since it can manage the switch to another backend, it |
| * updates the per-proxy DENY stats. |
| */ |
| int apply_filters_to_request(struct session *s, struct buffer *req, struct proxy *px) |
| { |
| struct http_txn *txn = &s->txn; |
| struct hdr_exp *exp; |
| |
| for (exp = px->req_exp; exp; exp = exp->next) { |
| int ret; |
| |
| /* |
| * The interleaving of transformations and verdicts |
| * makes it difficult to decide to continue or stop |
| * the evaluation. |
| */ |
| |
| if (txn->flags & (TX_CLDENY|TX_CLTARPIT)) |
| break; |
| |
| if ((txn->flags & TX_CLALLOW) && |
| (exp->action == ACT_ALLOW || exp->action == ACT_DENY || |
| exp->action == ACT_TARPIT || exp->action == ACT_PASS)) |
| continue; |
| |
| /* if this filter had a condition, evaluate it now and skip to |
| * next filter if the condition does not match. |
| */ |
| if (exp->cond) { |
| ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_REQ); |
| ret = acl_pass(ret); |
| if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| |
| if (!ret) |
| continue; |
| } |
| |
| /* Apply the filter to the request line. */ |
| ret = apply_filter_to_req_line(s, req, exp); |
| if (unlikely(ret < 0)) |
| return -1; |
| |
| if (likely(ret == 0)) { |
| /* The filter did not match the request, it can be |
| * iterated through all headers. |
| */ |
| apply_filter_to_req_headers(s, req, exp); |
| } |
| } |
| return 0; |
| } |
| |
| |
| |
| /* |
| * Try to retrieve the server associated to the appsession. |
| * If the server is found, it's assigned to the session. |
| */ |
| void manage_client_side_appsession(struct session *t, const char *buf, int len) { |
| struct http_txn *txn = &t->txn; |
| appsess *asession = NULL; |
| char *sessid_temp = NULL; |
| |
| if (len > t->be->appsession_len) { |
| len = t->be->appsession_len; |
| } |
| |
| if (t->be->options2 & PR_O2_AS_REQL) { |
| /* request-learn option is enabled : store the sessid in the session for future use */ |
| if (txn->sessid != NULL) { |
| /* free previously allocated memory as we don't need the session id found in the URL anymore */ |
| pool_free2(apools.sessid, txn->sessid); |
| } |
| |
| if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) { |
| Alert("Not enough memory process_cli():asession->sessid:malloc().\n"); |
| send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n"); |
| return; |
| } |
| |
| memcpy(txn->sessid, buf, len); |
| txn->sessid[len] = 0; |
| } |
| |
| if ((sessid_temp = pool_alloc2(apools.sessid)) == NULL) { |
| Alert("Not enough memory process_cli():asession->sessid:malloc().\n"); |
| send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n"); |
| return; |
| } |
| |
| memcpy(sessid_temp, buf, len); |
| sessid_temp[len] = 0; |
| |
| asession = appsession_hash_lookup(&(t->be->htbl_proxy), sessid_temp); |
| /* free previously allocated memory */ |
| pool_free2(apools.sessid, sessid_temp); |
| |
| if (asession != NULL) { |
| asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession); |
| if (!(t->be->options2 & PR_O2_AS_REQL)) |
| asession->request_count++; |
| |
| if (asession->serverid != NULL) { |
| struct server *srv = t->be->srv; |
| |
| while (srv) { |
| if (strcmp(srv->id, asession->serverid) == 0) { |
| if ((srv->state & SRV_RUNNING) || |
| (t->be->options & PR_O_PERSIST) || |
| (t->flags & SN_FORCE_PRST)) { |
| /* we found the server and it's usable */ |
| txn->flags &= ~TX_CK_MASK; |
| txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN; |
| t->flags |= SN_DIRECT | SN_ASSIGNED; |
| t->srv = srv; |
| break; |
| } else { |
| txn->flags &= ~TX_CK_MASK; |
| txn->flags |= TX_CK_DOWN; |
| } |
| } |
| srv = srv->next; |
| } |
| } |
| } |
| } |
| |
| /* Find the end of a cookie value contained between <s> and <e>. It works the |
| * same way as with headers above except that the semi-colon also ends a token. |
| * See RFC2965 for more information. Note that it requires a valid header to |
| * return a valid result. |
| */ |
| char *find_cookie_value_end(char *s, const char *e) |
| { |
| int quoted, qdpair; |
| |
| quoted = qdpair = 0; |
| for (; s < e; s++) { |
| if (qdpair) qdpair = 0; |
| else if (quoted) { |
| if (*s == '\\') qdpair = 1; |
| else if (*s == '"') quoted = 0; |
| } |
| else if (*s == '"') quoted = 1; |
| else if (*s == ',' || *s == ';') return s; |
| } |
| return s; |
| } |
| |
| /* Delete a value in a header between delimiters <from> and <next> in buffer |
| * <buf>. The number of characters displaced is returned, and the pointer to |
| * the first delimiter is updated if required. The function tries as much as |
| * possible to respect the following principles : |
| * - replace <from> delimiter by the <next> one unless <from> points to a |
| * colon, in which case <next> is simply removed |
| * - set exactly one space character after the new first delimiter, unless |
| * there are not enough characters in the block being moved to do so. |
| * - remove unneeded spaces before the previous delimiter and after the new |
| * one. |
| * |
| * It is the caller's responsibility to ensure that : |
| * - <from> points to a valid delimiter or the colon ; |
| * - <next> points to a valid delimiter or the final CR/LF ; |
| * - there are non-space chars before <from> ; |
| * - there is a CR/LF at or after <next>. |
| */ |
| int del_hdr_value(struct buffer *buf, char **from, char *next) |
| { |
| char *prev = *from; |
| |
| if (*prev == ':') { |
| /* We're removing the first value, preserve the colon and add a |
| * space if possible. |
| */ |
| if (!http_is_crlf[(unsigned char)*next]) |
| next++; |
| prev++; |
| if (prev < next) |
| *prev++ = ' '; |
| |
| while (http_is_spht[(unsigned char)*next]) |
| next++; |
| } else { |
| /* Remove useless spaces before the old delimiter. */ |
| while (http_is_spht[(unsigned char)*(prev-1)]) |
| prev--; |
| *from = prev; |
| |
| /* copy the delimiter and if possible a space if we're |
| * not at the end of the line. |
| */ |
| if (!http_is_crlf[(unsigned char)*next]) { |
| *prev++ = *next++; |
| if (prev + 1 < next) |
| *prev++ = ' '; |
| while (http_is_spht[(unsigned char)*next]) |
| next++; |
| } |
| } |
| return buffer_replace2(buf, prev, next, NULL, 0); |
| } |
| |
| /* |
| * Manage client-side cookie. It can impact performance by about 2% so it is |
| * desirable to call it only when needed. This code is quite complex because |
| * of the multiple very crappy and ambiguous syntaxes we have to support. it |
| * highly recommended not to touch this part without a good reason ! |
| */ |
| void manage_client_side_cookies(struct session *t, struct buffer *req) |
| { |
| struct http_txn *txn = &t->txn; |
| int preserve_hdr; |
| int cur_idx, old_idx; |
| char *hdr_beg, *hdr_end, *hdr_next, *del_from; |
| char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next; |
| |
| /* Iterate through the headers, we start with the start line. */ |
| old_idx = 0; |
| hdr_next = txn->req.sol + hdr_idx_first_pos(&txn->hdr_idx); |
| |
| while ((cur_idx = txn->hdr_idx.v[old_idx].next)) { |
| struct hdr_idx_elem *cur_hdr; |
| int val; |
| |
| cur_hdr = &txn->hdr_idx.v[cur_idx]; |
| hdr_beg = hdr_next; |
| hdr_end = hdr_beg + cur_hdr->len; |
| hdr_next = hdr_end + cur_hdr->cr + 1; |
| |
| /* We have one full header between hdr_beg and hdr_end, and the |
| * next header starts at hdr_next. We're only interested in |
| * "Cookie:" headers. |
| */ |
| |
| val = http_header_match2(hdr_beg, hdr_end, "Cookie", 6); |
| if (!val) { |
| old_idx = cur_idx; |
| continue; |
| } |
| |
| del_from = NULL; /* nothing to be deleted */ |
| preserve_hdr = 0; /* assume we may kill the whole header */ |
| |
| /* Now look for cookies. Conforming to RFC2109, we have to support |
| * attributes whose name begin with a '$', and associate them with |
| * the right cookie, if we want to delete this cookie. |
| * So there are 3 cases for each cookie read : |
| * 1) it's a special attribute, beginning with a '$' : ignore it. |
| * 2) it's a server id cookie that we *MAY* want to delete : save |
| * some pointers on it (last semi-colon, beginning of cookie...) |
| * 3) it's an application cookie : we *MAY* have to delete a previous |
| * "special" cookie. |
| * At the end of loop, if a "special" cookie remains, we may have to |
| * remove it. If no application cookie persists in the header, we |
| * *MUST* delete it. |
| * |
| * Note: RFC2965 is unclear about the processing of spaces around |
| * the equal sign in the ATTR=VALUE form. A careful inspection of |
| * the RFC explicitly allows spaces before it, and not within the |
| * tokens (attrs or values). An inspection of RFC2109 allows that |
| * too but section 10.1.3 lets one think that spaces may be allowed |
| * after the equal sign too, resulting in some (rare) buggy |
| * implementations trying to do that. So let's do what servers do. |
| * Latest ietf draft forbids spaces all around. Also, earlier RFCs |
| * allowed quoted strings in values, with any possible character |
| * after a backslash, including control chars and delimitors, which |
| * causes parsing to become ambiguous. Browsers also allow spaces |
| * within values even without quotes. |
| * |
| * We have to keep multiple pointers in order to support cookie |
| * removal at the beginning, middle or end of header without |
| * corrupting the header. All of these headers are valid : |
| * |
| * Cookie:NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3\r\n |
| * Cookie:NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3\r\n |
| * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n |
| * | | | | | | | | | |
| * | | | | | | | | hdr_end <--+ |
| * | | | | | | | +--> next |
| * | | | | | | +----> val_end |
| * | | | | | +-----------> val_beg |
| * | | | | +--------------> equal |
| * | | | +----------------> att_end |
| * | | +---------------------> att_beg |
| * | +--------------------------> prev |
| * +--------------------------------> hdr_beg |
| */ |
| |
| for (prev = hdr_beg + 6; prev < hdr_end; prev = next) { |
| /* Iterate through all cookies on this line */ |
| |
| /* find att_beg */ |
| att_beg = prev + 1; |
| while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg]) |
| att_beg++; |
| |
| /* find att_end : this is the first character after the last non |
| * space before the equal. It may be equal to hdr_end. |
| */ |
| equal = att_end = att_beg; |
| |
| while (equal < hdr_end) { |
| if (*equal == '=' || *equal == ',' || *equal == ';') |
| break; |
| if (http_is_spht[(unsigned char)*equal++]) |
| continue; |
| att_end = equal; |
| } |
| |
| /* here, <equal> points to '=', a delimitor or the end. <att_end> |
| * is between <att_beg> and <equal>, both may be identical. |
| */ |
| |
| /* look for end of cookie if there is an equal sign */ |
| if (equal < hdr_end && *equal == '=') { |
| /* look for the beginning of the value */ |
| val_beg = equal + 1; |
| while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg]) |
| val_beg++; |
| |
| /* find the end of the value, respecting quotes */ |
| next = find_cookie_value_end(val_beg, hdr_end); |
| |
| /* make val_end point to the first white space or delimitor after the value */ |
| val_end = next; |
| while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)]) |
| val_end--; |
| } else { |
| val_beg = val_end = next = equal; |
| } |
| |
| /* We have nothing to do with attributes beginning with '$'. However, |
| * they will automatically be removed if a header before them is removed, |
| * since they're supposed to be linked together. |
| */ |
| if (*att_beg == '$') |
| continue; |
| |
| /* Ignore cookies with no equal sign */ |
| if (equal == next) { |
| /* This is not our cookie, so we must preserve it. But if we already |
| * scheduled another cookie for removal, we cannot remove the |
| * complete header, but we can remove the previous block itself. |
| */ |
| preserve_hdr = 1; |
| if (del_from != NULL) { |
| int delta = del_hdr_value(req, &del_from, prev); |
| val_end += delta; |
| next += delta; |
| hdr_end += delta; |
| hdr_next += delta; |
| cur_hdr->len += delta; |
| http_msg_move_end(&txn->req, delta); |
| prev = del_from; |
| del_from = NULL; |
| } |
| continue; |
| } |
| |
| /* if there are spaces around the equal sign, we need to |
| * strip them otherwise we'll get trouble for cookie captures, |
| * or even for rewrites. Since this happens extremely rarely, |
| * it does not hurt performance. |
| */ |
| if (unlikely(att_end != equal || val_beg > equal + 1)) { |
| int stripped_before = 0; |
| int stripped_after = 0; |
| |
| if (att_end != equal) { |
| stripped_before = buffer_replace2(req, att_end, equal, NULL, 0); |
| equal += stripped_before; |
| val_beg += stripped_before; |
| } |
| |
| if (val_beg > equal + 1) { |
| stripped_after = buffer_replace2(req, equal + 1, val_beg, NULL, 0); |
| val_beg += stripped_after; |
| stripped_before += stripped_after; |
| } |
| |
| val_end += stripped_before; |
| next += stripped_before; |
| hdr_end += stripped_before; |
| hdr_next += stripped_before; |
| cur_hdr->len += stripped_before; |
| http_msg_move_end(&txn->req, stripped_before); |
| } |
| /* now everything is as on the diagram above */ |
| |
| /* First, let's see if we want to capture this cookie. We check |
| * that we don't already have a client side cookie, because we |
| * can only capture one. Also as an optimisation, we ignore |
| * cookies shorter than the declared name. |
| */ |
| if (t->fe->capture_name != NULL && txn->cli_cookie == NULL && |
| (val_end - att_beg >= t->fe->capture_namelen) && |
| memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) { |
| int log_len = val_end - att_beg; |
| |
| if ((txn->cli_cookie = pool_alloc2(pool2_capture)) == NULL) { |
| Alert("HTTP logging : out of memory.\n"); |
| } else { |
| if (log_len > t->fe->capture_len) |
| log_len = t->fe->capture_len; |
| memcpy(txn->cli_cookie, att_beg, log_len); |
| txn->cli_cookie[log_len] = 0; |
| } |
| } |
| |
| /* Persistence cookies in passive, rewrite or insert mode have the |
| * following form : |
| * |
| * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]] |
| * |
| * For cookies in prefix mode, the form is : |
| * |
| * Cookie: NAME=SRV~VALUE |
| */ |
| if ((att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) && |
| (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) { |
| struct server *srv = t->be->srv; |
| char *delim; |
| |
| /* if we're in cookie prefix mode, we'll search the delimitor so that we |
| * have the server ID between val_beg and delim, and the original cookie between |
| * delim+1 and val_end. Otherwise, delim==val_end : |
| * |
| * Cookie: NAME=SRV; # in all but prefix modes |
| * Cookie: NAME=SRV~OPAQUE ; # in prefix mode |
| * | || || | |+-> next |
| * | || || | +--> val_end |
| * | || || +---------> delim |
| * | || |+------------> val_beg |
| * | || +-------------> att_end = equal |
| * | |+-----------------> att_beg |
| * | +------------------> prev |
| * +-------------------------> hdr_beg |
| */ |
| |
| if (t->be->options & PR_O_COOK_PFX) { |
| for (delim = val_beg; delim < val_end; delim++) |
| if (*delim == COOKIE_DELIM) |
| break; |
| } else { |
| char *vbar1; |
| delim = val_end; |
| /* Now check if the cookie contains a date field, which would |
| * appear after a vertical bar ('|') just after the server name |
| * and before the delimiter. |
| */ |
| vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg); |
| if (vbar1) { |
| /* OK, so left of the bar is the server's cookie and |
| * right is the last seen date. It is a base64 encoded |
| * 30-bit value representing the UNIX date since the |
| * epoch in 4-second quantities. |
| */ |
| int val; |
| delim = vbar1++; |
| if (val_end - vbar1 >= 5) { |
| val = b64tos30(vbar1); |
| if (val > 0) |
| txn->cookie_last_date = val << 2; |
| } |
| /* look for a second vertical bar */ |
| vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1); |
| if (vbar1 && (val_end - vbar1 > 5)) { |
| val = b64tos30(vbar1 + 1); |
| if (val > 0) |
| txn->cookie_first_date = val << 2; |
| } |
| } |
| } |
| |
| /* if the cookie has an expiration date and the proxy wants to check |
| * it, then we do that now. We first check if the cookie is too old, |
| * then only if it has expired. We detect strict overflow because the |
| * time resolution here is not great (4 seconds). Cookies with dates |
| * in the future are ignored if their offset is beyond one day. This |
| * allows an admin to fix timezone issues without expiring everyone |
| * and at the same time avoids keeping unwanted side effects for too |
| * long. |
| */ |
| if (txn->cookie_first_date && t->be->cookie_maxlife && |
| (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)t->be->cookie_maxlife) || |
| ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) { |
| txn->flags &= ~TX_CK_MASK; |
| txn->flags |= TX_CK_OLD; |
| delim = val_beg; // let's pretend we have not found the cookie |
| txn->cookie_first_date = 0; |
| txn->cookie_last_date = 0; |
| } |
| else if (txn->cookie_last_date && t->be->cookie_maxidle && |
| (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)t->be->cookie_maxidle) || |
| ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) { |
| txn->flags &= ~TX_CK_MASK; |
| txn->flags |= TX_CK_EXPIRED; |
| delim = val_beg; // let's pretend we have not found the cookie |
| txn->cookie_first_date = 0; |
| txn->cookie_last_date = 0; |
| } |
| |
| /* Here, we'll look for the first running server which supports the cookie. |
| * This allows to share a same cookie between several servers, for example |
| * to dedicate backup servers to specific servers only. |
| * However, to prevent clients from sticking to cookie-less backup server |
| * when they have incidentely learned an empty cookie, we simply ignore |
| * empty cookies and mark them as invalid. |
| * The same behaviour is applied when persistence must be ignored. |
| */ |
| if ((delim == val_beg) || (t->flags & SN_IGNORE_PRST)) |
| srv = NULL; |
| |
| while (srv) { |
| if (srv->cookie && (srv->cklen == delim - val_beg) && |
| !memcmp(val_beg, srv->cookie, delim - val_beg)) { |
| if ((srv->state & SRV_RUNNING) || |
| (t->be->options & PR_O_PERSIST) || |
| (t->flags & SN_FORCE_PRST)) { |
| /* we found the server and we can use it */ |
| txn->flags &= ~TX_CK_MASK; |
| txn->flags |= (srv->state & SRV_RUNNING) ? TX_CK_VALID : TX_CK_DOWN; |
| t->flags |= SN_DIRECT | SN_ASSIGNED; |
| t->srv = srv; |
| break; |
| } else { |
| /* we found a server, but it's down, |
| * mark it as such and go on in case |
| * another one is available. |
| */ |
| txn->flags &= ~TX_CK_MASK; |
| txn->flags |= TX_CK_DOWN; |
| } |
| } |
| srv = srv->next; |
| } |
| |
| if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) { |
| /* no server matched this cookie */ |
| txn->flags &= ~TX_CK_MASK; |
| txn->flags |= TX_CK_INVALID; |
| } |
| |
| /* depending on the cookie mode, we may have to either : |
| * - delete the complete cookie if we're in insert+indirect mode, so that |
| * the server never sees it ; |
| * - remove the server id from the cookie value, and tag the cookie as an |
| * application cookie so that it does not get accidentely removed later, |
| * if we're in cookie prefix mode |
| */ |
| if ((t->be->options & PR_O_COOK_PFX) && (delim != val_end)) { |
| int delta; /* negative */ |
| |
| delta = buffer_replace2(req, val_beg, delim + 1, NULL, 0); |
| val_end += delta; |
| next += delta; |
| hdr_end += delta; |
| hdr_next += delta; |
| cur_hdr->len += delta; |
| http_msg_move_end(&txn->req, delta); |
| |
| del_from = NULL; |
| preserve_hdr = 1; /* we want to keep this cookie */ |
| } |
| else if (del_from == NULL && |
| (t->be->options & (PR_O_COOK_INS | PR_O_COOK_IND)) == (PR_O_COOK_INS | PR_O_COOK_IND)) { |
| del_from = prev; |
| } |
| } else { |
| /* This is not our cookie, so we must preserve it. But if we already |
| * scheduled another cookie for removal, we cannot remove the |
| * complete header, but we can remove the previous block itself. |
| */ |
| preserve_hdr = 1; |
| |
| if (del_from != NULL) { |
| int delta = del_hdr_value(req, &del_from, prev); |
| if (att_beg >= del_from) |
| att_beg += delta; |
| if (att_end >= del_from) |
| att_end += delta; |
| val_beg += delta; |
| val_end += delta; |
| next += delta; |
| hdr_end += delta; |
| hdr_next += delta; |
| cur_hdr->len += delta; |
| http_msg_move_end(&txn->req, delta); |
| prev = del_from; |
| del_from = NULL; |
| } |
| } |
| |
| /* Look for the appsession cookie unless persistence must be ignored */ |
| if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) { |
| int cmp_len, value_len; |
| char *value_begin; |
| |
| if (t->be->options2 & PR_O2_AS_PFX) { |
| cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len); |
| value_begin = att_beg + t->be->appsession_name_len; |
| value_len = val_end - att_beg - t->be->appsession_name_len; |
| } else { |
| cmp_len = att_end - att_beg; |
| value_begin = val_beg; |
| value_len = val_end - val_beg; |
| } |
| |
| /* let's see if the cookie is our appcookie */ |
| if (cmp_len == t->be->appsession_name_len && |
| memcmp(att_beg, t->be->appsession_name, cmp_len) == 0) { |
| manage_client_side_appsession(t, value_begin, value_len); |
| } |
| } |
| |
| /* continue with next cookie on this header line */ |
| att_beg = next; |
| } /* for each cookie */ |
| |
| /* There are no more cookies on this line. |
| * We may still have one (or several) marked for deletion at the |
| * end of the line. We must do this now in two ways : |
| * - if some cookies must be preserved, we only delete from the |
| * mark to the end of line ; |
| * - if nothing needs to be preserved, simply delete the whole header |
| */ |
| if (del_from) { |
| int delta; |
| if (preserve_hdr) { |
| delta = del_hdr_value(req, &del_from, hdr_end); |
| hdr_end = del_from; |
| cur_hdr->len += delta; |
| } else { |
| delta = buffer_replace2(req, hdr_beg, hdr_next, NULL, 0); |
| |
| /* FIXME: this should be a separate function */ |
| txn->hdr_idx.v[old_idx].next = cur_hdr->next; |
| txn->hdr_idx.used--; |
| cur_hdr->len = 0; |
| cur_idx = old_idx; |
| } |
| hdr_next += delta; |
| http_msg_move_end(&txn->req, delta); |
| } |
| |
| /* check next header */ |
| old_idx = cur_idx; |
| } |
| } |
| |
| |
| /* Iterate the same filter through all response headers contained in <rtr>. |
| * Returns 1 if this filter can be stopped upon return, otherwise 0. |
| */ |
| int apply_filter_to_resp_headers(struct session *t, struct buffer *rtr, struct hdr_exp *exp) |
| { |
| char term; |
| char *cur_ptr, *cur_end, *cur_next; |
| int cur_idx, old_idx, last_hdr; |
| struct http_txn *txn = &t->txn; |
| struct hdr_idx_elem *cur_hdr; |
| int len, delta; |
| |
| last_hdr = 0; |
| |
| cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx); |
| old_idx = 0; |
| |
| while (!last_hdr) { |
| if (unlikely(txn->flags & TX_SVDENY)) |
| return 1; |
| else if (unlikely(txn->flags & TX_SVALLOW) && |
| (exp->action == ACT_ALLOW || |
| exp->action == ACT_DENY)) |
| return 0; |
| |
| cur_idx = txn->hdr_idx.v[old_idx].next; |
| if (!cur_idx) |
| break; |
| |
| cur_hdr = &txn->hdr_idx.v[cur_idx]; |
| cur_ptr = cur_next; |
| cur_end = cur_ptr + cur_hdr->len; |
| cur_next = cur_end + cur_hdr->cr + 1; |
| |
| /* Now we have one header between cur_ptr and cur_end, |
| * and the next header starts at cur_next. |
| */ |
| |
| /* The annoying part is that pattern matching needs |
| * that we modify the contents to null-terminate all |
| * strings before testing them. |
| */ |
| |
| term = *cur_end; |
| *cur_end = '\0'; |
| |
| if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) { |
| switch (exp->action) { |
| case ACT_ALLOW: |
| txn->flags |= TX_SVALLOW; |
| last_hdr = 1; |
| break; |
| |
| case ACT_DENY: |
| txn->flags |= TX_SVDENY; |
| last_hdr = 1; |
| break; |
| |
| case ACT_REPLACE: |
| len = exp_replace(trash, cur_ptr, exp->replace, pmatch); |
| delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len); |
| /* FIXME: if the user adds a newline in the replacement, the |
| * index will not be recalculated for now, and the new line |
| * will not be counted as a new header. |
| */ |
| |
| cur_end += delta; |
| cur_next += delta; |
| cur_hdr->len += delta; |
| http_msg_move_end(&txn->rsp, delta); |
| break; |
| |
| case ACT_REMOVE: |
| delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0); |
| cur_next += delta; |
| |
| http_msg_move_end(&txn->rsp, delta); |
| txn->hdr_idx.v[old_idx].next = cur_hdr->next; |
| txn->hdr_idx.used--; |
| cur_hdr->len = 0; |
| cur_end = NULL; /* null-term has been rewritten */ |
| cur_idx = old_idx; |
| break; |
| |
| } |
| } |
| if (cur_end) |
| *cur_end = term; /* restore the string terminator */ |
| |
| /* keep the link from this header to next one in case of later |
| * removal of next header. |
| */ |
| old_idx = cur_idx; |
| } |
| return 0; |
| } |
| |
| |
| /* Apply the filter to the status line in the response buffer <rtr>. |
| * Returns 0 if nothing has been done, 1 if the filter has been applied, |
| * or -1 if a replacement resulted in an invalid status line. |
| */ |
| int apply_filter_to_sts_line(struct session *t, struct buffer *rtr, struct hdr_exp *exp) |
| { |
| char term; |
| char *cur_ptr, *cur_end; |
| int done; |
| struct http_txn *txn = &t->txn; |
| int len, delta; |
| |
| |
| if (unlikely(txn->flags & TX_SVDENY)) |
| return 1; |
| else if (unlikely(txn->flags & TX_SVALLOW) && |
| (exp->action == ACT_ALLOW || |
| exp->action == ACT_DENY)) |
| return 0; |
| else if (exp->action == ACT_REMOVE) |
| return 0; |
| |
| done = 0; |
| |
| cur_ptr = txn->rsp.sol; |
| cur_end = cur_ptr + txn->rsp.sl.st.l; |
| |
| /* Now we have the status line between cur_ptr and cur_end */ |
| |
| /* The annoying part is that pattern matching needs |
| * that we modify the contents to null-terminate all |
| * strings before testing them. |
| */ |
| |
| term = *cur_end; |
| *cur_end = '\0'; |
| |
| if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) { |
| switch (exp->action) { |
| case ACT_ALLOW: |
| txn->flags |= TX_SVALLOW; |
| done = 1; |
| break; |
| |
| case ACT_DENY: |
| txn->flags |= TX_SVDENY; |
| done = 1; |
| break; |
| |
| case ACT_REPLACE: |
| *cur_end = term; /* restore the string terminator */ |
| len = exp_replace(trash, cur_ptr, exp->replace, pmatch); |
| delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len); |
| /* FIXME: if the user adds a newline in the replacement, the |
| * index will not be recalculated for now, and the new line |
| * will not be counted as a new header. |
| */ |
| |
| http_msg_move_end(&txn->rsp, delta); |
| cur_end += delta; |
| cur_end = (char *)http_parse_stsline(&txn->rsp, rtr->data, |
| HTTP_MSG_RPVER, |
| cur_ptr, cur_end + 1, |
| NULL, NULL); |
| if (unlikely(!cur_end)) |
| return -1; |
| |
| /* we have a full respnse and we know that we have either a CR |
| * or an LF at <ptr>. |
| */ |
| txn->status = strl2ui(txn->rsp.sol + txn->rsp.sl.st.c, txn->rsp.sl.st.c_l); |
| hdr_idx_set_start(&txn->hdr_idx, txn->rsp.sl.st.l, *cur_end == '\r'); |
| /* there is no point trying this regex on headers */ |
| return 1; |
| } |
| } |
| *cur_end = term; /* restore the string terminator */ |
| return done; |
| } |
| |
| |
| |
| /* |
| * Apply all the resp filters of proxy <px> to all headers in buffer <rtr> of session <s>. |
| * Returns 0 if everything is alright, or -1 in case a replacement lead to an |
| * unparsable response. |
| */ |
| int apply_filters_to_response(struct session *s, struct buffer *rtr, struct proxy *px) |
| { |
| struct http_txn *txn = &s->txn; |
| struct hdr_exp *exp; |
| |
| for (exp = px->rsp_exp; exp; exp = exp->next) { |
| int ret; |
| |
| /* |
| * The interleaving of transformations and verdicts |
| * makes it difficult to decide to continue or stop |
| * the evaluation. |
| */ |
| |
| if (txn->flags & TX_SVDENY) |
| break; |
| |
| if ((txn->flags & TX_SVALLOW) && |
| (exp->action == ACT_ALLOW || exp->action == ACT_DENY || |
| exp->action == ACT_PASS)) { |
| exp = exp->next; |
| continue; |
| } |
| |
| /* if this filter had a condition, evaluate it now and skip to |
| * next filter if the condition does not match. |
| */ |
| if (exp->cond) { |
| ret = acl_exec_cond(exp->cond, px, s, txn, ACL_DIR_RTR); |
| ret = acl_pass(ret); |
| if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| if (!ret) |
| continue; |
| } |
| |
| /* Apply the filter to the status line. */ |
| ret = apply_filter_to_sts_line(s, rtr, exp); |
| if (unlikely(ret < 0)) |
| return -1; |
| |
| if (likely(ret == 0)) { |
| /* The filter did not match the response, it can be |
| * iterated through all headers. |
| */ |
| apply_filter_to_resp_headers(s, rtr, exp); |
| } |
| } |
| return 0; |
| } |
| |
| |
| /* |
| * Manage server-side cookies. It can impact performance by about 2% so it is |
| * desirable to call it only when needed. This function is also used when we |
| * just need to know if there is a cookie (eg: for check-cache). |
| */ |
| void manage_server_side_cookies(struct session *t, struct buffer *res) |
| { |
| struct http_txn *txn = &t->txn; |
| int is_cookie2; |
| int cur_idx, old_idx, delta; |
| char *hdr_beg, *hdr_end, *hdr_next; |
| char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next; |
| |
| /* Iterate through the headers. |
| * we start with the start line. |
| */ |
| old_idx = 0; |
| hdr_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx); |
| |
| while ((cur_idx = txn->hdr_idx.v[old_idx].next)) { |
| struct hdr_idx_elem *cur_hdr; |
| int val; |
| |
| cur_hdr = &txn->hdr_idx.v[cur_idx]; |
| hdr_beg = hdr_next; |
| hdr_end = hdr_beg + cur_hdr->len; |
| hdr_next = hdr_end + cur_hdr->cr + 1; |
| |
| /* We have one full header between hdr_beg and hdr_end, and the |
| * next header starts at hdr_next. We're only interested in |
| * "Set-Cookie" and "Set-Cookie2" headers. |
| */ |
| |
| is_cookie2 = 0; |
| prev = hdr_beg + 10; |
| val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie", 10); |
| if (!val) { |
| val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie2", 11); |
| if (!val) { |
| old_idx = cur_idx; |
| continue; |
| } |
| is_cookie2 = 1; |
| prev = hdr_beg + 11; |
| } |
| |
| /* OK, right now we know we have a Set-Cookie* at hdr_beg, and |
| * <prev> points to the colon. |
| */ |
| txn->flags |= TX_SCK_PRESENT; |
| |
| /* Maybe we only wanted to see if there was a Set-Cookie (eg: |
| * check-cache is enabled) and we are not interested in checking |
| * them. Warning, the cookie capture is declared in the frontend. |
| */ |
| if (t->be->cookie_name == NULL && |
| t->be->appsession_name == NULL && |
| t->fe->capture_name == NULL) |
| return; |
| |
| /* OK so now we know we have to process this response cookie. |
| * The format of the Set-Cookie header is slightly different |
| * from the format of the Cookie header in that it does not |
| * support the comma as a cookie delimiter (thus the header |
| * cannot be folded) because the Expires attribute described in |
| * the original Netscape's spec may contain an unquoted date |
| * with a comma inside. We have to live with this because |
| * many browsers don't support Max-Age and some browsers don't |
| * support quoted strings. However the Set-Cookie2 header is |
| * clean. |
| * |
| * We have to keep multiple pointers in order to support cookie |
| * removal at the beginning, middle or end of header without |
| * corrupting the header (in case of set-cookie2). A special |
| * pointer, <scav> points to the beginning of the set-cookie-av |
| * fields after the first semi-colon. The <next> pointer points |
| * either to the end of line (set-cookie) or next unquoted comma |
| * (set-cookie2). All of these headers are valid : |
| * |
| * Set-Cookie: NAME1 = VALUE 1 ; Secure; Path="/"\r\n |
| * Set-Cookie:NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n |
| * Set-Cookie: NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n |
| * Set-Cookie2: NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard\r\n |
| * | | | | | | | | | | |
| * | | | | | | | | +-> next hdr_end <--+ |
| * | | | | | | | +------------> scav |
| * | | | | | | +--------------> val_end |
| * | | | | | +--------------------> val_beg |
| * | | | | +----------------------> equal |
| * | | | +------------------------> att_end |
| * | | +----------------------------> att_beg |
| * | +------------------------------> prev |
| * +-----------------------------------------> hdr_beg |
| */ |
| |
| for (; prev < hdr_end; prev = next) { |
| /* Iterate through all cookies on this line */ |
| |
| /* find att_beg */ |
| att_beg = prev + 1; |
| while (att_beg < hdr_end && http_is_spht[(unsigned char)*att_beg]) |
| att_beg++; |
| |
| /* find att_end : this is the first character after the last non |
| * space before the equal. It may be equal to hdr_end. |
| */ |
| equal = att_end = att_beg; |
| |
| while (equal < hdr_end) { |
| if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ',')) |
| break; |
| if (http_is_spht[(unsigned char)*equal++]) |
| continue; |
| att_end = equal; |
| } |
| |
| /* here, <equal> points to '=', a delimitor or the end. <att_end> |
| * is between <att_beg> and <equal>, both may be identical. |
| */ |
| |
| /* look for end of cookie if there is an equal sign */ |
| if (equal < hdr_end && *equal == '=') { |
| /* look for the beginning of the value */ |
| val_beg = equal + 1; |
| while (val_beg < hdr_end && http_is_spht[(unsigned char)*val_beg]) |
| val_beg++; |
| |
| /* find the end of the value, respecting quotes */ |
| next = find_cookie_value_end(val_beg, hdr_end); |
| |
| /* make val_end point to the first white space or delimitor after the value */ |
| val_end = next; |
| while (val_end > val_beg && http_is_spht[(unsigned char)*(val_end - 1)]) |
| val_end--; |
| } else { |
| /* <equal> points to next comma, semi-colon or EOL */ |
| val_beg = val_end = next = equal; |
| } |
| |
| if (next < hdr_end) { |
| /* Set-Cookie2 supports multiple cookies, and <next> points to |
| * a colon or semi-colon before the end. So skip all attr-value |
| * pairs and look for the next comma. For Set-Cookie, since |
| * commas are permitted in values, skip to the end. |
| */ |
| if (is_cookie2) |
| next = find_hdr_value_end(next, hdr_end); |
| else |
| next = hdr_end; |
| } |
| |
| /* Now everything is as on the diagram above */ |
| |
| /* Ignore cookies with no equal sign */ |
| if (equal == val_end) |
| continue; |
| |
| /* If there are spaces around the equal sign, we need to |
| * strip them otherwise we'll get trouble for cookie captures, |
| * or even for rewrites. Since this happens extremely rarely, |
| * it does not hurt performance. |
| */ |
| if (unlikely(att_end != equal || val_beg > equal + 1)) { |
| int stripped_before = 0; |
| int stripped_after = 0; |
| |
| if (att_end != equal) { |
| stripped_before = buffer_replace2(res, att_end, equal, NULL, 0); |
| equal += stripped_before; |
| val_beg += stripped_before; |
| } |
| |
| if (val_beg > equal + 1) { |
| stripped_after = buffer_replace2(res, equal + 1, val_beg, NULL, 0); |
| val_beg += stripped_after; |
| stripped_before += stripped_after; |
| } |
| |
| val_end += stripped_before; |
| next += stripped_before; |
| hdr_end += stripped_before; |
| hdr_next += stripped_before; |
| cur_hdr->len += stripped_before; |
| http_msg_move_end(&txn->req, stripped_before); |
| } |
| |
| /* First, let's see if we want to capture this cookie. We check |
| * that we don't already have a server side cookie, because we |
| * can only capture one. Also as an optimisation, we ignore |
| * cookies shorter than the declared name. |
| */ |
| if (t->fe->capture_name != NULL && |
| txn->srv_cookie == NULL && |
| (val_end - att_beg >= t->fe->capture_namelen) && |
| memcmp(att_beg, t->fe->capture_name, t->fe->capture_namelen) == 0) { |
| int log_len = val_end - att_beg; |
| if ((txn->srv_cookie = pool_alloc2(pool2_capture)) == NULL) { |
| Alert("HTTP logging : out of memory.\n"); |
| } |
| else { |
| if (log_len > t->fe->capture_len) |
| log_len = t->fe->capture_len; |
| memcpy(txn->srv_cookie, att_beg, log_len); |
| txn->srv_cookie[log_len] = 0; |
| } |
| } |
| |
| /* now check if we need to process it for persistence */ |
| if (!(t->flags & SN_IGNORE_PRST) && |
| (att_end - att_beg == t->be->cookie_len) && (t->be->cookie_name != NULL) && |
| (memcmp(att_beg, t->be->cookie_name, att_end - att_beg) == 0)) { |
| /* assume passive cookie by default */ |
| txn->flags &= ~TX_SCK_MASK; |
| txn->flags |= TX_SCK_FOUND; |
| |
| /* If the cookie is in insert mode on a known server, we'll delete |
| * this occurrence because we'll insert another one later. |
| * We'll delete it too if the "indirect" option is set and we're in |
| * a direct access. |
| */ |
| if (t->be->options2 & PR_O2_COOK_PSV) { |
| /* The "preserve" flag was set, we don't want to touch the |
| * server's cookie. |
| */ |
| } |
| else if (((t->srv) && (t->be->options & PR_O_COOK_INS)) || |
| ((t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_IND))) { |
| /* this cookie must be deleted */ |
| if (*prev == ':' && next == hdr_end) { |
| /* whole header */ |
| delta = buffer_replace2(res, hdr_beg, hdr_next, NULL, 0); |
| txn->hdr_idx.v[old_idx].next = cur_hdr->next; |
| txn->hdr_idx.used--; |
| cur_hdr->len = 0; |
| cur_idx = old_idx; |
| hdr_next += delta; |
| http_msg_move_end(&txn->rsp, delta); |
| /* note: while both invalid now, <next> and <hdr_end> |
| * are still equal, so the for() will stop as expected. |
| */ |
| } else { |
| /* just remove the value */ |
| int delta = del_hdr_value(res, &prev, next); |
| next = prev; |
| hdr_end += delta; |
| hdr_next += delta; |
| cur_hdr->len += delta; |
| http_msg_move_end(&txn->rsp, delta); |
| } |
| txn->flags &= ~TX_SCK_MASK; |
| txn->flags |= TX_SCK_DELETED; |
| /* and go on with next cookie */ |
| } |
| else if ((t->srv) && (t->srv->cookie) && |
| (t->be->options & PR_O_COOK_RW)) { |
| /* replace bytes val_beg->val_end with the cookie name associated |
| * with this server since we know it. |
| */ |
| delta = buffer_replace2(res, val_beg, val_end, t->srv->cookie, t->srv->cklen); |
| next += delta; |
| hdr_end += delta; |
| hdr_next += delta; |
| cur_hdr->len += delta; |
| http_msg_move_end(&txn->rsp, delta); |
| |
| txn->flags &= ~TX_SCK_MASK; |
| txn->flags |= TX_SCK_REPLACED; |
| } |
| else if ((t->srv) && (t->srv->cookie) && |
| (t->be->options & PR_O_COOK_PFX)) { |
| /* insert the cookie name associated with this server |
| * before existing cookie, and insert a delimiter between them.. |
| */ |
| delta = buffer_replace2(res, val_beg, val_beg, t->srv->cookie, t->srv->cklen + 1); |
| next += delta; |
| hdr_end += delta; |
| hdr_next += delta; |
| cur_hdr->len += delta; |
| http_msg_move_end(&txn->rsp, delta); |
| |
| val_beg[t->srv->cklen] = COOKIE_DELIM; |
| txn->flags &= ~TX_SCK_MASK; |
| txn->flags |= TX_SCK_REPLACED; |
| } |
| } |
| /* next, let's see if the cookie is our appcookie, unless persistence must be ignored */ |
| else if (!(t->flags & SN_IGNORE_PRST) && (t->be->appsession_name != NULL)) { |
| int cmp_len, value_len; |
| char *value_begin; |
| |
| if (t->be->options2 & PR_O2_AS_PFX) { |
| cmp_len = MIN(val_end - att_beg, t->be->appsession_name_len); |
| value_begin = att_beg + t->be->appsession_name_len; |
| value_len = MIN(t->be->appsession_len, val_end - att_beg - t->be->appsession_name_len); |
| } else { |
| cmp_len = att_end - att_beg; |
| value_begin = val_beg; |
| value_len = MIN(t->be->appsession_len, val_end - val_beg); |
| } |
| |
| if ((cmp_len == t->be->appsession_name_len) && |
| (memcmp(att_beg, t->be->appsession_name, t->be->appsession_name_len) == 0)) { |
| /* free a possibly previously allocated memory */ |
| pool_free2(apools.sessid, txn->sessid); |
| |
| /* Store the sessid in the session for future use */ |
| if ((txn->sessid = pool_alloc2(apools.sessid)) == NULL) { |
| Alert("Not enough Memory process_srv():asession->sessid:malloc().\n"); |
| send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n"); |
| return; |
| } |
| memcpy(txn->sessid, value_begin, value_len); |
| txn->sessid[value_len] = 0; |
| } |
| } |
| /* that's done for this cookie, check the next one on the same |
| * line when next != hdr_end (only if is_cookie2). |
| */ |
| } |
| /* check next header */ |
| old_idx = cur_idx; |
| } |
| |
| if (txn->sessid != NULL) { |
| appsess *asession = NULL; |
| /* only do insert, if lookup fails */ |
| asession = appsession_hash_lookup(&(t->be->htbl_proxy), txn->sessid); |
| if (asession == NULL) { |
| size_t server_id_len; |
| if ((asession = pool_alloc2(pool2_appsess)) == NULL) { |
| Alert("Not enough Memory process_srv():asession:calloc().\n"); |
| send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession:calloc().\n"); |
| return; |
| } |
| asession->serverid = NULL; /* to avoid a double free in case of allocation error */ |
| |
| if ((asession->sessid = pool_alloc2(apools.sessid)) == NULL) { |
| Alert("Not enough Memory process_srv():asession->sessid:malloc().\n"); |
| send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n"); |
| t->be->htbl_proxy.destroy(asession); |
| return; |
| } |
| memcpy(asession->sessid, txn->sessid, t->be->appsession_len); |
| asession->sessid[t->be->appsession_len] = 0; |
| |
| server_id_len = strlen(t->srv->id) + 1; |
| if ((asession->serverid = pool_alloc2(apools.serverid)) == NULL) { |
| Alert("Not enough Memory process_srv():asession->serverid:malloc().\n"); |
| send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n"); |
| t->be->htbl_proxy.destroy(asession); |
| return; |
| } |
| asession->serverid[0] = '\0'; |
| memcpy(asession->serverid, t->srv->id, server_id_len); |
| |
| asession->request_count = 0; |
| appsession_hash_insert(&(t->be->htbl_proxy), asession); |
| } |
| |
| asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession); |
| asession->request_count++; |
| } |
| } |
| |
| |
| /* |
| * Check if response is cacheable or not. Updates t->flags. |
| */ |
| void check_response_for_cacheability(struct session *t, struct buffer *rtr) |
| { |
| struct http_txn *txn = &t->txn; |
| char *p1, *p2; |
| |
| char *cur_ptr, *cur_end, *cur_next; |
| int cur_idx; |
| |
| if (!(txn->flags & TX_CACHEABLE)) |
| return; |
| |
| /* Iterate through the headers. |
| * we start with the start line. |
| */ |
| cur_idx = 0; |
| cur_next = txn->rsp.sol + hdr_idx_first_pos(&txn->hdr_idx); |
| |
| while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) { |
| struct hdr_idx_elem *cur_hdr; |
| int val; |
| |
| cur_hdr = &txn->hdr_idx.v[cur_idx]; |
| cur_ptr = cur_next; |
| cur_end = cur_ptr + cur_hdr->len; |
| cur_next = cur_end + cur_hdr->cr + 1; |
| |
| /* We have one full header between cur_ptr and cur_end, and the |
| * next header starts at cur_next. We're only interested in |
| * "Cookie:" headers. |
| */ |
| |
| val = http_header_match2(cur_ptr, cur_end, "Pragma", 6); |
| if (val) { |
| if ((cur_end - (cur_ptr + val) >= 8) && |
| strncasecmp(cur_ptr + val, "no-cache", 8) == 0) { |
| txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK; |
| return; |
| } |
| } |
| |
| val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13); |
| if (!val) |
| continue; |
| |
| /* OK, right now we know we have a cache-control header at cur_ptr */ |
| |
| p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */ |
| |
| if (p1 >= cur_end) /* no more info */ |
| continue; |
| |
| /* p1 is at the beginning of the value */ |
| p2 = p1; |
| |
| while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2)) |
| p2++; |
| |
| /* we have a complete value between p1 and p2 */ |
| if (p2 < cur_end && *p2 == '=') { |
| /* we have something of the form no-cache="set-cookie" */ |
| if ((cur_end - p1 >= 21) && |
| strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0 |
| && (p1[20] == '"' || p1[20] == ',')) |
| txn->flags &= ~TX_CACHE_COOK; |
| continue; |
| } |
| |
| /* OK, so we know that either p2 points to the end of string or to a comma */ |
| if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) || |
| ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) || |
| ((p2 - p1 == 9) && strncasecmp(p1, "max-age=0", 9) == 0) || |
| ((p2 - p1 == 10) && strncasecmp(p1, "s-maxage=0", 10) == 0)) { |
| txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK; |
| return; |
| } |
| |
| if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) { |
| txn->flags |= TX_CACHEABLE | TX_CACHE_COOK; |
| continue; |
| } |
| } |
| } |
| |
| |
| /* |
| * Try to retrieve a known appsession in the URI, then the associated server. |
| * If the server is found, it's assigned to the session. |
| */ |
| void get_srv_from_appsession(struct session *t, const char *begin, int len) |
| { |
| char *end_params, *first_param, *cur_param, *next_param; |
| char separator; |
| int value_len; |
| |
| int mode = t->be->options2 & PR_O2_AS_M_ANY; |
| |
| if (t->be->appsession_name == NULL || |
| (t->txn.meth != HTTP_METH_GET && t->txn.meth != HTTP_METH_POST && t->txn.meth != HTTP_METH_HEAD)) { |
| return; |
| } |
| |
| first_param = NULL; |
| switch (mode) { |
| case PR_O2_AS_M_PP: |
| first_param = memchr(begin, ';', len); |
| break; |
| case PR_O2_AS_M_QS: |
| first_param = memchr(begin, '?', len); |
| break; |
| } |
| |
| if (first_param == NULL) { |
| return; |
| } |
| |
| switch (mode) { |
| case PR_O2_AS_M_PP: |
| if ((end_params = memchr(first_param, '?', len - (begin - first_param))) == NULL) { |
| end_params = (char *) begin + len; |
| } |
| separator = ';'; |
| break; |
| case PR_O2_AS_M_QS: |
| end_params = (char *) begin + len; |
| separator = '&'; |
| break; |
| default: |
| /* unknown mode, shouldn't happen */ |
| return; |
| } |
| |
| cur_param = next_param = end_params; |
| while (cur_param > first_param) { |
| cur_param--; |
| if ((cur_param[0] == separator) || (cur_param == first_param)) { |
| /* let's see if this is the appsession parameter */ |
| if ((cur_param + t->be->appsession_name_len + 1 < next_param) && |
| ((t->be->options2 & PR_O2_AS_PFX) || cur_param[t->be->appsession_name_len + 1] == '=') && |
| (strncasecmp(cur_param + 1, t->be->appsession_name, t->be->appsession_name_len) == 0)) { |
| /* Cool... it's the right one */ |
| cur_param += t->be->appsession_name_len + (t->be->options2 & PR_O2_AS_PFX ? 1 : 2); |
| value_len = MIN(t->be->appsession_len, next_param - cur_param); |
| if (value_len > 0) { |
| manage_client_side_appsession(t, cur_param, value_len); |
| } |
| break; |
| } |
| next_param = cur_param; |
| } |
| } |
| #if defined(DEBUG_HASH) |
| Alert("get_srv_from_appsession\n"); |
| appsession_hash_dump(&(t->be->htbl_proxy)); |
| #endif |
| } |
| |
| /* |
| * In a GET, HEAD or POST request, check if the requested URI matches the stats uri |
| * for the current backend. |
| * |
| * It is assumed that the request is either a HEAD, GET, or POST and that the |
| * t->be->uri_auth field is valid. |
| * |
| * Returns 1 if stats should be provided, otherwise 0. |
| */ |
| int stats_check_uri(struct session *t, struct proxy *backend) |
| { |
| struct http_txn *txn = &t->txn; |
| struct uri_auth *uri_auth = backend->uri_auth; |
| char *h; |
| |
| if (!uri_auth) |
| return 0; |
| |
| if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD && txn->meth != HTTP_METH_POST) |
| return 0; |
| |
| memset(&t->data_ctx.stats, 0, sizeof(t->data_ctx.stats)); |
| |
| /* check URI size */ |
| if (uri_auth->uri_len > txn->req.sl.rq.u_l) |
| return 0; |
| |
| h = txn->req.sol + txn->req.sl.rq.u; |
| |
| /* the URI is in h */ |
| if (memcmp(h, uri_auth->uri_prefix, uri_auth->uri_len) != 0) |
| return 0; |
| |
| h += uri_auth->uri_len; |
| while (h <= txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 3) { |
| if (memcmp(h, ";up", 3) == 0) { |
| t->data_ctx.stats.flags |= STAT_HIDE_DOWN; |
| break; |
| } |
| h++; |
| } |
| |
| if (uri_auth->refresh) { |
| h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len; |
| while (h <= txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 10) { |
| if (memcmp(h, ";norefresh", 10) == 0) { |
| t->data_ctx.stats.flags |= STAT_NO_REFRESH; |
| break; |
| } |
| h++; |
| } |
| } |
| |
| h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len; |
| while (h <= txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 4) { |
| if (memcmp(h, ";csv", 4) == 0) { |
| t->data_ctx.stats.flags |= STAT_FMT_CSV; |
| break; |
| } |
| h++; |
| } |
| |
| h = txn->req.sol + txn->req.sl.rq.u + uri_auth->uri_len; |
| while (h <= txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 8) { |
| if (memcmp(h, ";st=", 4) == 0) { |
| h += 4; |
| |
| if (memcmp(h, STAT_STATUS_DONE, 4) == 0) |
| t->data_ctx.stats.st_code = STAT_STATUS_DONE; |
| else if (memcmp(h, STAT_STATUS_NONE, 4) == 0) |
| t->data_ctx.stats.st_code = STAT_STATUS_NONE; |
| else if (memcmp(h, STAT_STATUS_EXCD, 4) == 0) |
| t->data_ctx.stats.st_code = STAT_STATUS_EXCD; |
| else if (memcmp(h, STAT_STATUS_DENY, 4) == 0) |
| t->data_ctx.stats.st_code = STAT_STATUS_DENY; |
| else |
| t->data_ctx.stats.st_code = STAT_STATUS_UNKN; |
| break; |
| } |
| h++; |
| } |
| |
| t->data_ctx.stats.flags |= STAT_SHOW_STAT | STAT_SHOW_INFO; |
| |
| return 1; |
| } |
| |
| /* |
| * Capture a bad request or response and archive it in the proxy's structure. |
| * WARNING: it's unlikely that we've reached HTTP_MSG_BODY here so we must not |
| * assume that msg->sol = buf->data + msg->som. |
| */ |
| void http_capture_bad_message(struct error_snapshot *es, struct session *s, |
| struct buffer *buf, struct http_msg *msg, |
| int state, struct proxy *other_end) |
| { |
| if (buf->r <= (buf->data + msg->som)) { /* message wraps */ |
| int len1 = buf->size - msg->som; |
| es->len = buf->r - (buf->data + msg->som) + buf->size; |
| memcpy(es->buf, buf->data + msg->som, MIN(len1, sizeof(es->buf))); |
| if (es->len > len1 && len1 < sizeof(es->buf)) |
| memcpy(es->buf, buf->data, MIN(es->len, sizeof(es->buf)) - len1); |
| } |
| else { |
| es->len = buf->r - (buf->data + msg->som); |
| memcpy(es->buf, buf->data + msg->som, MIN(es->len, sizeof(es->buf))); |
| } |
| |
| if (msg->err_pos >= 0) |
| es->pos = msg->err_pos - msg->som; |
| else if (buf->lr >= (buf->data + msg->som)) |
| es->pos = buf->lr - (buf->data + msg->som); |
| else |
| es->pos = buf->lr - (buf->data + msg->som) + buf->size; |
| |
| es->when = date; // user-visible date |
| es->sid = s->uniq_id; |
| es->srv = s->srv; |
| es->oe = other_end; |
| es->src = s->cli_addr; |
| es->state = state; |
| es->flags = buf->flags; |
| es->ev_id = error_snapshot_id++; |
| } |
| |
| /* return the IP address pointed to by occurrence <occ> of header <hname> in |
| * HTTP message <msg> indexed in <idx>. If <occ> is strictly positive, the |
| * occurrence number corresponding to this value is returned. If <occ> is |
| * strictly negative, the occurrence number before the end corresponding to |
| * this value is returned. If <occ> is null, any value is returned, so it is |
| * not recommended to use it that way. Negative occurrences are limited to |
| * a small value because it is required to keep them in memory while scanning. |
| * IP address 0.0.0.0 is returned if no match is found. |
| */ |
| unsigned int get_ip_from_hdr2(struct http_msg *msg, const char *hname, int hlen, struct hdr_idx *idx, int occ) |
| { |
| struct hdr_ctx ctx; |
| unsigned int hdr_hist[MAX_HDR_HISTORY]; |
| unsigned int hist_ptr; |
| int found = 0; |
| |
| ctx.idx = 0; |
| if (occ >= 0) { |
| while (http_find_header2(hname, hlen, msg->sol, idx, &ctx)) { |
| occ--; |
| if (occ <= 0) { |
| found = 1; |
| break; |
| } |
| } |
| if (!found) |
| return 0; |
| return inetaddr_host_lim(ctx.line+ctx.val, ctx.line+ctx.val+ctx.vlen); |
| } |
| |
| /* negative occurrence, we scan all the list then walk back */ |
| if (-occ > MAX_HDR_HISTORY) |
| return 0; |
| |
| hist_ptr = 0; |
| hdr_hist[hist_ptr] = 0; |
| while (http_find_header2(hname, hlen, msg->sol, idx, &ctx)) { |
| hdr_hist[hist_ptr++] = inetaddr_host_lim(ctx.line+ctx.val, ctx.line+ctx.val+ctx.vlen); |
| if (hist_ptr >= MAX_HDR_HISTORY) |
| hist_ptr = 0; |
| found++; |
| } |
| if (-occ > found) |
| return 0; |
| /* OK now we have the last occurrence in [hist_ptr-1], and we need to |
| * find occurrence -occ, so we have to check [hist_ptr+occ]. |
| */ |
| hist_ptr += occ; |
| if (hist_ptr >= MAX_HDR_HISTORY) |
| hist_ptr -= MAX_HDR_HISTORY; |
| return hdr_hist[hist_ptr]; |
| } |
| |
| /* |
| * Print a debug line with a header |
| */ |
| void debug_hdr(const char *dir, struct session *t, const char *start, const char *end) |
| { |
| int len, max; |
| len = sprintf(trash, "%08x:%s.%s[%04x:%04x]: ", t->uniq_id, t->be->id, |
| dir, (unsigned short)t->req->prod->fd, (unsigned short)t->req->cons->fd); |
| max = end - start; |
| UBOUND(max, sizeof(trash) - len - 1); |
| len += strlcpy2(trash + len, start, max + 1); |
| trash[len++] = '\n'; |
| write(1, trash, len); |
| } |
| |
| /* |
| * Initialize a new HTTP transaction for session <s>. It is assumed that all |
| * the required fields are properly allocated and that we only need to (re)init |
| * them. This should be used before processing any new request. |
| */ |
| void http_init_txn(struct session *s) |
| { |
| struct http_txn *txn = &s->txn; |
| struct proxy *fe = s->fe; |
| |
| txn->flags = 0; |
| txn->status = -1; |
| |
| txn->cookie_first_date = 0; |
| txn->cookie_last_date = 0; |
| |
| txn->req.sol = txn->req.eol = NULL; |
| txn->req.som = txn->req.eoh = 0; /* relative to the buffer */ |
| txn->rsp.sol = txn->rsp.eol = NULL; |
| txn->rsp.som = txn->rsp.eoh = 0; /* relative to the buffer */ |
| txn->req.hdr_content_len = 0LL; |
| txn->rsp.hdr_content_len = 0LL; |
| txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */ |
| txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */ |
| |
| txn->auth.method = HTTP_AUTH_UNKNOWN; |
| |
| txn->req.err_pos = txn->rsp.err_pos = -2; /* block buggy requests/responses */ |
| if (fe->options2 & PR_O2_REQBUG_OK) |
| txn->req.err_pos = -1; /* let buggy requests pass */ |
| |
| if (txn->req.cap) |
| memset(txn->req.cap, 0, fe->nb_req_cap * sizeof(void *)); |
| |
| if (txn->rsp.cap) |
| memset(txn->rsp.cap, 0, fe->nb_rsp_cap * sizeof(void *)); |
| |
| if (txn->hdr_idx.v) |
| hdr_idx_init(&txn->hdr_idx); |
| } |
| |
| /* to be used at the end of a transaction */ |
| void http_end_txn(struct session *s) |
| { |
| struct http_txn *txn = &s->txn; |
| |
| /* these ones will have been dynamically allocated */ |
| pool_free2(pool2_requri, txn->uri); |
| pool_free2(pool2_capture, txn->cli_cookie); |
| pool_free2(pool2_capture, txn->srv_cookie); |
| pool_free2(apools.sessid, txn->sessid); |
| |
| txn->sessid = NULL; |
| txn->uri = NULL; |
| txn->srv_cookie = NULL; |
| txn->cli_cookie = NULL; |
| |
| if (txn->req.cap) { |
| struct cap_hdr *h; |
| for (h = s->fe->req_cap; h; h = h->next) |
| pool_free2(h->pool, txn->req.cap[h->index]); |
| memset(txn->req.cap, 0, s->fe->nb_req_cap * sizeof(void *)); |
| } |
| |
| if (txn->rsp.cap) { |
| struct cap_hdr *h; |
| for (h = s->fe->rsp_cap; h; h = h->next) |
| pool_free2(h->pool, txn->rsp.cap[h->index]); |
| memset(txn->rsp.cap, 0, s->fe->nb_rsp_cap * sizeof(void *)); |
| } |
| |
| } |
| |
| /* to be used at the end of a transaction to prepare a new one */ |
| void http_reset_txn(struct session *s) |
| { |
| http_end_txn(s); |
| http_init_txn(s); |
| |
| s->be = s->fe; |
| s->logs.logwait = s->fe->to_log; |
| s->srv = s->prev_srv = s->srv_conn = NULL; |
| /* re-init store persistence */ |
| s->store_count = 0; |
| |
| s->pend_pos = NULL; |
| |
| s->req->flags |= BF_READ_DONTWAIT; /* one read is usually enough */ |
| |
| /* We must trim any excess data from the response buffer, because we |
| * may have blocked an invalid response from a server that we don't |
| * want to accidentely forward once we disable the analysers, nor do |
| * we want those data to come along with next response. A typical |
| * example of such data would be from a buggy server responding to |
| * a HEAD with some data, or sending more than the advertised |
| * content-length. |
| */ |
| if (unlikely(s->rep->l > s->rep->send_max)) { |
| s->rep->l = s->rep->send_max; |
| s->rep->r = s->rep->w + s->rep->l; |
| if (s->rep->r >= s->rep->data + s->rep->size) |
| s->rep->r -= s->rep->size; |
| } |
| |
| s->req->rto = s->fe->timeout.client; |
| s->req->wto = TICK_ETERNITY; |
| |
| s->rep->rto = TICK_ETERNITY; |
| s->rep->wto = s->fe->timeout.client; |
| |
| s->req->rex = TICK_ETERNITY; |
| s->req->wex = TICK_ETERNITY; |
| s->req->analyse_exp = TICK_ETERNITY; |
| s->rep->rex = TICK_ETERNITY; |
| s->rep->wex = TICK_ETERNITY; |
| s->rep->analyse_exp = TICK_ETERNITY; |
| } |
| |
| /************************************************************************/ |
| /* The code below is dedicated to ACL parsing and matching */ |
| /************************************************************************/ |
| |
| |
| |
| |
| /* 1. Check on METHOD |
| * We use the pre-parsed method if it is known, and store its number as an |
| * integer. If it is unknown, we use the pointer and the length. |
| */ |
| static int acl_parse_meth(const char **text, struct acl_pattern *pattern, int *opaque) |
| { |
| int len, meth; |
| |
| len = strlen(*text); |
| meth = find_http_meth(*text, len); |
| |
| pattern->val.i = meth; |
| if (meth == HTTP_METH_OTHER) { |
| pattern->ptr.str = strdup(*text); |
| if (!pattern->ptr.str) |
| return 0; |
| pattern->len = len; |
| } |
| return 1; |
| } |
| |
| static int |
| acl_fetch_meth(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| int meth; |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->req.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| meth = txn->meth; |
| test->i = meth; |
| if (meth == HTTP_METH_OTHER) { |
| if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE) |
| /* ensure the indexes are not affected */ |
| return 0; |
| test->len = txn->req.sl.rq.m_l; |
| test->ptr = txn->req.sol; |
| } |
| test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST; |
| return 1; |
| } |
| |
| static int acl_match_meth(struct acl_test *test, struct acl_pattern *pattern) |
| { |
| int icase; |
| |
| if (test->i != pattern->val.i) |
| return ACL_PAT_FAIL; |
| |
| if (test->i != HTTP_METH_OTHER) |
| return ACL_PAT_PASS; |
| |
| /* Other method, we must compare the strings */ |
| if (pattern->len != test->len) |
| return ACL_PAT_FAIL; |
| |
| icase = pattern->flags & ACL_PAT_F_IGNORE_CASE; |
| if ((icase && strncasecmp(pattern->ptr.str, test->ptr, test->len) != 0) || |
| (!icase && strncmp(pattern->ptr.str, test->ptr, test->len) != 0)) |
| return ACL_PAT_FAIL; |
| return ACL_PAT_PASS; |
| } |
| |
| /* 2. Check on Request/Status Version |
| * We simply compare strings here. |
| */ |
| static int acl_parse_ver(const char **text, struct acl_pattern *pattern, int *opaque) |
| { |
| pattern->ptr.str = strdup(*text); |
| if (!pattern->ptr.str) |
| return 0; |
| pattern->len = strlen(*text); |
| return 1; |
| } |
| |
| static int |
| acl_fetch_rqver(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| char *ptr; |
| int len; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->req.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| len = txn->req.sl.rq.v_l; |
| ptr = txn->req.sol + txn->req.sl.rq.v; |
| |
| while ((len-- > 0) && (*ptr++ != '/')); |
| if (len <= 0) |
| return 0; |
| |
| test->ptr = ptr; |
| test->len = len; |
| |
| test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST; |
| return 1; |
| } |
| |
| static int |
| acl_fetch_stver(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| char *ptr; |
| int len; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->rsp.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| len = txn->rsp.sl.st.v_l; |
| ptr = txn->rsp.sol; |
| |
| while ((len-- > 0) && (*ptr++ != '/')); |
| if (len <= 0) |
| return 0; |
| |
| test->ptr = ptr; |
| test->len = len; |
| |
| test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST; |
| return 1; |
| } |
| |
| /* 3. Check on Status Code. We manipulate integers here. */ |
| static int |
| acl_fetch_stcode(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| char *ptr; |
| int len; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->rsp.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| len = txn->rsp.sl.st.c_l; |
| ptr = txn->rsp.sol + txn->rsp.sl.st.c; |
| |
| test->i = __strl2ui(ptr, len); |
| test->flags = ACL_TEST_F_VOL_1ST; |
| return 1; |
| } |
| |
| /* 4. Check on URL/URI. A pointer to the URI is stored. */ |
| static int |
| acl_fetch_url(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->req.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE) |
| /* ensure the indexes are not affected */ |
| return 0; |
| |
| test->len = txn->req.sl.rq.u_l; |
| test->ptr = txn->req.sol + txn->req.sl.rq.u; |
| |
| /* we do not need to set READ_ONLY because the data is in a buffer */ |
| test->flags = ACL_TEST_F_VOL_1ST; |
| return 1; |
| } |
| |
| static int |
| acl_fetch_url_ip(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->req.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE) |
| /* ensure the indexes are not affected */ |
| return 0; |
| |
| /* Parse HTTP request */ |
| url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr); |
| test->ptr = (void *)&((struct sockaddr_in *)&l4->srv_addr)->sin_addr; |
| test->i = AF_INET; |
| |
| /* |
| * If we are parsing url in frontend space, we prepare backend stage |
| * to not parse again the same url ! optimization lazyness... |
| */ |
| if (px->options & PR_O_HTTP_PROXY) |
| l4->flags |= SN_ADDR_SET; |
| |
| test->flags = ACL_TEST_F_READ_ONLY; |
| return 1; |
| } |
| |
| static int |
| acl_fetch_url_port(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->req.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE) |
| /* ensure the indexes are not affected */ |
| return 0; |
| |
| /* Same optimization as url_ip */ |
| url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr); |
| test->i = ntohs(((struct sockaddr_in *)&l4->srv_addr)->sin_port); |
| |
| if (px->options & PR_O_HTTP_PROXY) |
| l4->flags |= SN_ADDR_SET; |
| |
| test->flags = ACL_TEST_F_READ_ONLY; |
| return 1; |
| } |
| |
| /* 5. Check on HTTP header. A pointer to the beginning of the value is returned. |
| * This generic function is used by both acl_fetch_chdr() and acl_fetch_shdr(). |
| */ |
| static int |
| acl_fetch_hdr(struct proxy *px, struct session *l4, void *l7, char *sol, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| struct hdr_idx *idx = &txn->hdr_idx; |
| struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a; |
| |
| if (!txn) |
| return 0; |
| |
| if (!(test->flags & ACL_TEST_F_FETCH_MORE)) |
| /* search for header from the beginning */ |
| ctx->idx = 0; |
| |
| if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) { |
| test->flags |= ACL_TEST_F_FETCH_MORE; |
| test->flags |= ACL_TEST_F_VOL_HDR; |
| test->len = ctx->vlen; |
| test->ptr = (char *)ctx->line + ctx->val; |
| return 1; |
| } |
| |
| test->flags &= ~ACL_TEST_F_FETCH_MORE; |
| test->flags |= ACL_TEST_F_VOL_HDR; |
| return 0; |
| } |
| |
| static int |
| acl_fetch_chdr(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->req.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE) |
| /* ensure the indexes are not affected */ |
| return 0; |
| |
| return acl_fetch_hdr(px, l4, txn, txn->req.sol, expr, test); |
| } |
| |
| static int |
| acl_fetch_shdr(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->rsp.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| return acl_fetch_hdr(px, l4, txn, txn->rsp.sol, expr, test); |
| } |
| |
| /* 6. Check on HTTP header count. The number of occurrences is returned. |
| * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*. |
| */ |
| static int |
| acl_fetch_hdr_cnt(struct proxy *px, struct session *l4, void *l7, char *sol, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| struct hdr_idx *idx = &txn->hdr_idx; |
| struct hdr_ctx ctx; |
| int cnt; |
| |
| if (!txn) |
| return 0; |
| |
| ctx.idx = 0; |
| cnt = 0; |
| while (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, &ctx)) |
| cnt++; |
| |
| test->i = cnt; |
| test->flags = ACL_TEST_F_VOL_HDR; |
| return 1; |
| } |
| |
| static int |
| acl_fetch_chdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->req.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE) |
| /* ensure the indexes are not affected */ |
| return 0; |
| |
| return acl_fetch_hdr_cnt(px, l4, txn, txn->req.sol, expr, test); |
| } |
| |
| static int |
| acl_fetch_shdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->rsp.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| return acl_fetch_hdr_cnt(px, l4, txn, txn->rsp.sol, expr, test); |
| } |
| |
| /* 7. Check on HTTP header's integer value. The integer value is returned. |
| * FIXME: the type is 'int', it may not be appropriate for everything. |
| * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*. |
| */ |
| static int |
| acl_fetch_hdr_val(struct proxy *px, struct session *l4, void *l7, char *sol, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| struct hdr_idx *idx = &txn->hdr_idx; |
| struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a; |
| |
| if (!txn) |
| return 0; |
| |
| if (!(test->flags & ACL_TEST_F_FETCH_MORE)) |
| /* search for header from the beginning */ |
| ctx->idx = 0; |
| |
| if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) { |
| test->flags |= ACL_TEST_F_FETCH_MORE; |
| test->flags |= ACL_TEST_F_VOL_HDR; |
| test->i = strl2ic((char *)ctx->line + ctx->val, ctx->vlen); |
| return 1; |
| } |
| |
| test->flags &= ~ACL_TEST_F_FETCH_MORE; |
| test->flags |= ACL_TEST_F_VOL_HDR; |
| return 0; |
| } |
| |
| static int |
| acl_fetch_chdr_val(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->req.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE) |
| /* ensure the indexes are not affected */ |
| return 0; |
| |
| return acl_fetch_hdr_val(px, l4, txn, txn->req.sol, expr, test); |
| } |
| |
| static int |
| acl_fetch_shdr_val(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->rsp.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| return acl_fetch_hdr_val(px, l4, txn, txn->rsp.sol, expr, test); |
| } |
| |
| /* 7. Check on HTTP header's IPv4 address value. The IPv4 address is returned. |
| * This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*. |
| */ |
| static int |
| acl_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, char *sol, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| struct hdr_idx *idx = &txn->hdr_idx; |
| struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a; |
| |
| if (!txn) |
| return 0; |
| |
| if (!(test->flags & ACL_TEST_F_FETCH_MORE)) |
| /* search for header from the beginning */ |
| ctx->idx = 0; |
| |
| if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) { |
| test->flags |= ACL_TEST_F_FETCH_MORE; |
| test->flags |= ACL_TEST_F_VOL_HDR; |
| /* Same optimization as url_ip */ |
| memset(&l4->srv_addr.sin_addr, 0, sizeof(l4->srv_addr.sin_addr)); |
| url2ip((char *)ctx->line + ctx->val, &l4->srv_addr.sin_addr); |
| test->ptr = (void *)&l4->srv_addr.sin_addr; |
| test->i = AF_INET; |
| return 1; |
| } |
| |
| test->flags &= ~ACL_TEST_F_FETCH_MORE; |
| test->flags |= ACL_TEST_F_VOL_HDR; |
| return 0; |
| } |
| |
| static int |
| acl_fetch_chdr_ip(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->req.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE) |
| /* ensure the indexes are not affected */ |
| return 0; |
| |
| return acl_fetch_hdr_ip(px, l4, txn, txn->req.sol, expr, test); |
| } |
| |
| static int |
| acl_fetch_shdr_ip(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->rsp.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| return acl_fetch_hdr_ip(px, l4, txn, txn->rsp.sol, expr, test); |
| } |
| |
| /* 8. Check on URI PATH. A pointer to the PATH is stored. The path starts at |
| * the first '/' after the possible hostname, and ends before the possible '?'. |
| */ |
| static int |
| acl_fetch_path(struct proxy *px, struct session *l4, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct http_txn *txn = l7; |
| char *ptr, *end; |
| |
| if (!txn) |
| return 0; |
| |
| if (txn->req.msg_state < HTTP_MSG_BODY) |
| return 0; |
| |
| if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE) |
| /* ensure the indexes are not affected */ |
| return 0; |
| |
| end = txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l; |
| ptr = http_get_path(txn); |
| if (!ptr) |
| return 0; |
| |
| /* OK, we got the '/' ! */ |
| test->ptr = ptr; |
| |
| while (ptr < end && *ptr != '?') |
| ptr++; |
| |
| test->len = ptr - test->ptr; |
| |
| /* we do not need to set READ_ONLY because the data is in a buffer */ |
| test->flags = ACL_TEST_F_VOL_1ST; |
| return 1; |
| } |
| |
| static int |
| acl_fetch_proto_http(struct proxy *px, struct session *s, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| struct buffer *req = s->req; |
| struct http_txn *txn = &s->txn; |
| struct http_msg *msg = &txn->req; |
| |
| /* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged |
| * as a layer7 ACL, which involves automatic allocation of hdr_idx. |
| */ |
| |
| if (!s || !req) |
| return 0; |
| |
| if (unlikely(msg->msg_state >= HTTP_MSG_BODY)) { |
| /* Already decoded as OK */ |
| test->flags |= ACL_TEST_F_SET_RES_PASS; |
| return 1; |
| } |
| |
| /* Try to decode HTTP request */ |
| if (likely(req->lr < req->r)) |
| http_msg_analyzer(req, msg, &txn->hdr_idx); |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) { |
| if ((msg->msg_state == HTTP_MSG_ERROR) || (req->flags & BF_FULL)) { |
| test->flags |= ACL_TEST_F_SET_RES_FAIL; |
| return 1; |
| } |
| /* wait for final state */ |
| test->flags |= ACL_TEST_F_MAY_CHANGE; |
| return 0; |
| } |
| |
| /* OK we got a valid HTTP request. We have some minor preparation to |
| * perform so that further checks can rely on HTTP tests. |
| */ |
| txn->meth = find_http_meth(msg->sol, msg->sl.rq.m_l); |
| if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD) |
| s->flags |= SN_REDIRECTABLE; |
| |
| if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn)) { |
| test->flags |= ACL_TEST_F_SET_RES_FAIL; |
| return 1; |
| } |
| |
| test->flags |= ACL_TEST_F_SET_RES_PASS; |
| return 1; |
| } |
| |
| /* return a valid test if the current request is the first one on the connection */ |
| static int |
| acl_fetch_http_first_req(struct proxy *px, struct session *s, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| if (!s) |
| return 0; |
| |
| if (s->txn.flags & TX_NOT_FIRST) |
| test->flags |= ACL_TEST_F_SET_RES_FAIL; |
| else |
| test->flags |= ACL_TEST_F_SET_RES_PASS; |
| |
| return 1; |
| } |
| |
| static int |
| acl_fetch_http_auth(struct proxy *px, struct session *s, void *l7, int dir, |
| struct acl_expr *expr, struct acl_test *test) |
| { |
| |
| if (!s) |
| return 0; |
| |
| if (!get_http_auth(s)) |
| return 0; |
| |
| test->ctx.a[0] = expr->arg.ul; |
| test->ctx.a[1] = s->txn.auth.user; |
| test->ctx.a[2] = s->txn.auth.pass; |
| |
| test->flags |= ACL_TEST_F_READ_ONLY | ACL_TEST_F_NULL_MATCH; |
| |
| return 1; |
| } |
| |
| /************************************************************************/ |
| /* All supported keywords must be declared here. */ |
| /************************************************************************/ |
| |
| /* Note: must not be declared <const> as its list will be overwritten */ |
| static struct acl_kw_list acl_kws = {{ },{ |
| { "req_proto_http", acl_parse_nothing, acl_fetch_proto_http, acl_match_nothing, ACL_USE_L7REQ_PERMANENT }, |
| |
| { "method", acl_parse_meth, acl_fetch_meth, acl_match_meth, ACL_USE_L7REQ_PERMANENT }, |
| { "req_ver", acl_parse_ver, acl_fetch_rqver, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP }, |
| { "resp_ver", acl_parse_ver, acl_fetch_stver, acl_match_str, ACL_USE_L7RTR_VOLATILE|ACL_MAY_LOOKUP }, |
| { "status", acl_parse_int, acl_fetch_stcode, acl_match_int, ACL_USE_L7RTR_PERMANENT }, |
| |
| { "url", acl_parse_str, acl_fetch_url, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP }, |
| { "url_beg", acl_parse_str, acl_fetch_url, acl_match_beg, ACL_USE_L7REQ_VOLATILE }, |
| { "url_end", acl_parse_str, acl_fetch_url, acl_match_end, ACL_USE_L7REQ_VOLATILE }, |
| { "url_sub", acl_parse_str, acl_fetch_url, acl_match_sub, ACL_USE_L7REQ_VOLATILE }, |
| { "url_dir", acl_parse_str, acl_fetch_url, acl_match_dir, ACL_USE_L7REQ_VOLATILE }, |
| { "url_dom", acl_parse_str, acl_fetch_url, acl_match_dom, ACL_USE_L7REQ_VOLATILE }, |
| { "url_reg", acl_parse_reg, acl_fetch_url, acl_match_reg, ACL_USE_L7REQ_VOLATILE }, |
| { "url_ip", acl_parse_ip, acl_fetch_url_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP }, |
| { "url_port", acl_parse_int, acl_fetch_url_port, acl_match_int, ACL_USE_L7REQ_VOLATILE }, |
| |
| /* note: we should set hdr* to use ACL_USE_HDR_VOLATILE, and chdr* to use L7REQ_VOLATILE */ |
| { "hdr", acl_parse_str, acl_fetch_chdr, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP }, |
| { "hdr_reg", acl_parse_reg, acl_fetch_chdr, acl_match_reg, ACL_USE_L7REQ_VOLATILE }, |
| { "hdr_beg", acl_parse_str, acl_fetch_chdr, acl_match_beg, ACL_USE_L7REQ_VOLATILE }, |
| { "hdr_end", acl_parse_str, acl_fetch_chdr, acl_match_end, ACL_USE_L7REQ_VOLATILE }, |
| { "hdr_sub", acl_parse_str, acl_fetch_chdr, acl_match_sub, ACL_USE_L7REQ_VOLATILE }, |
| { "hdr_dir", acl_parse_str, acl_fetch_chdr, acl_match_dir, ACL_USE_L7REQ_VOLATILE }, |
| { "hdr_dom", acl_parse_str, acl_fetch_chdr, acl_match_dom, ACL_USE_L7REQ_VOLATILE }, |
| { "hdr_cnt", acl_parse_int, acl_fetch_chdr_cnt,acl_match_int, ACL_USE_L7REQ_VOLATILE }, |
| { "hdr_val", acl_parse_int, acl_fetch_chdr_val,acl_match_int, ACL_USE_L7REQ_VOLATILE }, |
| { "hdr_ip", acl_parse_ip, acl_fetch_chdr_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP }, |
| |
| { "shdr", acl_parse_str, acl_fetch_shdr, acl_match_str, ACL_USE_L7RTR_VOLATILE|ACL_MAY_LOOKUP }, |
| { "shdr_reg", acl_parse_reg, acl_fetch_shdr, acl_match_reg, ACL_USE_L7RTR_VOLATILE }, |
| { "shdr_beg", acl_parse_str, acl_fetch_shdr, acl_match_beg, ACL_USE_L7RTR_VOLATILE }, |
| { "shdr_end", acl_parse_str, acl_fetch_shdr, acl_match_end, ACL_USE_L7RTR_VOLATILE }, |
| { "shdr_sub", acl_parse_str, acl_fetch_shdr, acl_match_sub, ACL_USE_L7RTR_VOLATILE }, |
| { "shdr_dir", acl_parse_str, acl_fetch_shdr, acl_match_dir, ACL_USE_L7RTR_VOLATILE }, |
| { "shdr_dom", acl_parse_str, acl_fetch_shdr, acl_match_dom, ACL_USE_L7RTR_VOLATILE }, |
| { "shdr_cnt", acl_parse_int, acl_fetch_shdr_cnt,acl_match_int, ACL_USE_L7RTR_VOLATILE }, |
| { "shdr_val", acl_parse_int, acl_fetch_shdr_val,acl_match_int, ACL_USE_L7RTR_VOLATILE }, |
| { "shdr_ip", acl_parse_ip, acl_fetch_shdr_ip, acl_match_ip, ACL_USE_L7RTR_VOLATILE|ACL_MAY_LOOKUP }, |
| |
| { "path", acl_parse_str, acl_fetch_path, acl_match_str, ACL_USE_L7REQ_VOLATILE|ACL_MAY_LOOKUP }, |
| { "path_reg", acl_parse_reg, acl_fetch_path, acl_match_reg, ACL_USE_L7REQ_VOLATILE }, |
| { "path_beg", acl_parse_str, acl_fetch_path, acl_match_beg, ACL_USE_L7REQ_VOLATILE }, |
| { "path_end", acl_parse_str, acl_fetch_path, acl_match_end, ACL_USE_L7REQ_VOLATILE }, |
| { "path_sub", acl_parse_str, acl_fetch_path, acl_match_sub, ACL_USE_L7REQ_VOLATILE }, |
| { "path_dir", acl_parse_str, acl_fetch_path, acl_match_dir, ACL_USE_L7REQ_VOLATILE }, |
| { "path_dom", acl_parse_str, acl_fetch_path, acl_match_dom, ACL_USE_L7REQ_VOLATILE }, |
| |
| #if 0 |
| { "line", acl_parse_str, acl_fetch_line, acl_match_str }, |
| { "line_reg", acl_parse_reg, acl_fetch_line, acl_match_reg }, |
| { "line_beg", acl_parse_str, acl_fetch_line, acl_match_beg }, |
| { "line_end", acl_parse_str, acl_fetch_line, acl_match_end }, |
| { "line_sub", acl_parse_str, acl_fetch_line, acl_match_sub }, |
| { "line_dir", acl_parse_str, acl_fetch_line, acl_match_dir }, |
| { "line_dom", acl_parse_str, acl_fetch_line, acl_match_dom }, |
| |
| { "cook", acl_parse_str, acl_fetch_cook, acl_match_str }, |
| { "cook_reg", acl_parse_reg, acl_fetch_cook, acl_match_reg }, |
| { "cook_beg", acl_parse_str, acl_fetch_cook, acl_match_beg }, |
| { "cook_end", acl_parse_str, acl_fetch_cook, acl_match_end }, |
| { "cook_sub", acl_parse_str, acl_fetch_cook, acl_match_sub }, |
| { "cook_dir", acl_parse_str, acl_fetch_cook, acl_match_dir }, |
| { "cook_dom", acl_parse_str, acl_fetch_cook, acl_match_dom }, |
| { "cook_pst", acl_parse_none, acl_fetch_cook, acl_match_pst }, |
| #endif |
| |
| { "http_auth", acl_parse_nothing, acl_fetch_http_auth, acl_match_auth, ACL_USE_L7REQ_PERMANENT }, |
| { "http_auth_group", acl_parse_strcat, acl_fetch_http_auth, acl_match_auth, ACL_USE_L7REQ_PERMANENT }, |
| { "http_first_req", acl_parse_nothing, acl_fetch_http_first_req, acl_match_nothing, ACL_USE_L7REQ_PERMANENT }, |
| { NULL, NULL, NULL, NULL }, |
| }}; |
| |
| /************************************************************************/ |
| /* The code below is dedicated to pattern fetching and matching */ |
| /************************************************************************/ |
| |
| /* extract the IP address from the last occurrence of specified header. Note |
| * that we should normally first extract the string then convert it to IP, |
| * but right now we have all the functions to do this seemlessly, and we will |
| * be able to change that later without touching the configuration. |
| */ |
| static int |
| pattern_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, int dir, |
| const struct pattern_arg *arg_p, int arg_i, union pattern_data *data) |
| { |
| struct http_txn *txn = l7; |
| |
| data->ip.s_addr = htonl(get_ip_from_hdr2(&txn->req, arg_p->data.str.str, arg_p->data.str.len, &txn->hdr_idx, -1)); |
| return data->ip.s_addr != 0; |
| } |
| |
| /* |
| * Given a path string and its length, find the position of beginning of the |
| * query string. Returns NULL if no query string is found in the path. |
| * |
| * Example: if path = "/foo/bar/fubar?yo=mama;ye=daddy", and n = 22: |
| * |
| * find_query_string(path, n) points to "yo=mama;ye=daddy" string. |
| */ |
| static inline char *find_query_string(char *path, size_t path_l) |
| { |
| char *p; |
| |
| p = memchr(path, '?', path_l); |
| return p ? p + 1 : NULL; |
| } |
| |
| static inline int is_param_delimiter(char c) |
| { |
| return c == '&' || c == ';'; |
| } |
| |
| /* |
| * Given a url parameter, find the starting position of the first occurence, |
| * or NULL if the parameter is not found. |
| * |
| * Example: if query_string is "yo=mama;ye=daddy" and url_param_name is "ye", |
| * the function will return query_string+8. |
| */ |
| static char* |
| find_url_param_pos(char* query_string, size_t query_string_l, |
| char* url_param_name, size_t url_param_name_l) |
| { |
| char *pos, *last; |
| |
| pos = query_string; |
| last = query_string + query_string_l - url_param_name_l - 1; |
| |
| while (pos <= last) { |
| if (pos[url_param_name_l] == '=') { |
| if (memcmp(pos, url_param_name, url_param_name_l) == 0) |
| return pos; |
| pos += url_param_name_l + 1; |
| } |
| while (pos <= last && !is_param_delimiter(*pos)) |
| pos++; |
| pos++; |
| } |
| return NULL; |
| } |
| |
| /* |
| * Given a url parameter name, returns its value and size into *value and |
| * *value_l respectively, and returns non-zero. If the parameter is not found, |
| * zero is returned and value/value_l are not touched. |
| */ |
| static int |
| find_url_param_value(char* path, size_t path_l, |
| char* url_param_name, size_t url_param_name_l, |
| char** value, size_t* value_l) |
| { |
| char *query_string, *qs_end; |
| char *arg_start; |
| char *value_start, *value_end; |
| |
| query_string = find_query_string(path, path_l); |
| if (!query_string) |
| return 0; |
| |
| qs_end = path + path_l; |
| arg_start = find_url_param_pos(query_string, qs_end - query_string, |
| url_param_name, url_param_name_l); |
| if (!arg_start) |
| return 0; |
| |
| value_start = arg_start + url_param_name_l + 1; |
| value_end = value_start; |
| |
| while ((value_end < qs_end) && !is_param_delimiter(*value_end)) |
| value_end++; |
| |
| *value = value_start; |
| *value_l = value_end - value_start; |
| return value_end != value_start; |
| } |
| |
| static int |
| pattern_fetch_url_param(struct proxy *px, struct session *l4, void *l7, int dir, |
| const struct pattern_arg *arg_p, int arg_i, union pattern_data *data) |
| { |
| struct http_txn *txn = l7; |
| struct http_msg *msg = &txn->req; |
| char *url_param_value; |
| size_t url_param_value_l; |
| |
| if (!find_url_param_value(msg->sol + msg->sl.rq.u, msg->sl.rq.u_l, |
| arg_p->data.str.str, arg_p->data.str.len, |
| &url_param_value, &url_param_value_l)) |
| return 0; |
| |
| data->str.str = url_param_value; |
| data->str.len = url_param_value_l; |
| return 1; |
| } |
| |
| |
| /************************************************************************/ |
| /* All supported keywords must be declared here. */ |
| /************************************************************************/ |
| /* Note: must not be declared <const> as its list will be overwritten */ |
| static struct pattern_fetch_kw_list pattern_fetch_keywords = {{ },{ |
| { "hdr", pattern_fetch_hdr_ip, pattern_arg_str, PATTERN_TYPE_IP, PATTERN_FETCH_REQ }, |
| { "url_param", pattern_fetch_url_param, pattern_arg_str, PATTERN_TYPE_STRING, PATTERN_FETCH_REQ }, |
| { NULL, NULL, NULL, 0, 0 }, |
| }}; |
| |
| |
| __attribute__((constructor)) |
| static void __http_protocol_init(void) |
| { |
| acl_register_keywords(&acl_kws); |
| pattern_register_fetches(&pattern_fetch_keywords); |
| } |
| |
| |
| /* |
| * Local variables: |
| * c-indent-level: 8 |
| * c-basic-offset: 8 |
| * End: |
| */ |