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Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
Willy Tarreaub0c9bc42009-10-04 15:56:38 +02002 * include/proto/proto_http.h
3 * This file contains HTTP protocol definitions.
4 *
Willy Tarreauff011f22011-01-06 17:51:27 +01005 * Copyright (C) 2000-2011 Willy Tarreau - w@1wt.eu
Willy Tarreaub0c9bc42009-10-04 15:56:38 +02006 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation, version 2.1
10 * exclusively.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
Willy Tarreaubaaee002006-06-26 02:48:02 +020021
22#ifndef _PROTO_PROTO_HTTP_H
23#define _PROTO_PROTO_HTTP_H
24
Willy Tarreaue3ba5f02006-06-29 18:54:54 +020025#include <common/config.h>
Thierry FOURNIERec3c37d2015-09-10 18:28:10 +020026#include <types/action.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020027#include <types/proto_http.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020028#include <types/stream.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020029#include <types/task.h>
30
Willy Tarreau58f10d72006-12-04 02:26:12 +010031/*
32 * some macros used for the request parsing.
33 * from RFC2616:
34 * CTL = <any US-ASCII control character (octets 0 - 31) and DEL (127)>
Willy Tarreau8d5d7f22007-01-21 19:16:41 +010035 * SEP = one of the 17 defined separators or SP or HT
36 * LWS = CR, LF, SP or HT
37 * SPHT = SP or HT. Use this macro and not a boolean expression for best speed.
38 * CRLF = CR or LF. Use this macro and not a boolean expression for best speed.
39 * token = any CHAR except CTL or SEP. Use this macro and not a boolean expression for best speed.
Willy Tarreau4b89ad42007-03-04 18:13:58 +010040 *
41 * added for ease of use:
42 * ver_token = 'H', 'P', 'T', '/', '.', and digits.
Willy Tarreau58f10d72006-12-04 02:26:12 +010043 */
Willy Tarreau58f10d72006-12-04 02:26:12 +010044
Willy Tarreau8d5d7f22007-01-21 19:16:41 +010045extern const char http_is_ctl[256];
46extern const char http_is_sep[256];
47extern const char http_is_lws[256];
48extern const char http_is_spht[256];
49extern const char http_is_crlf[256];
50extern const char http_is_token[256];
Willy Tarreau4b89ad42007-03-04 18:13:58 +010051extern const char http_is_ver_token[256];
Willy Tarreau8d5d7f22007-01-21 19:16:41 +010052
Willy Tarreau436d9ed2011-05-11 16:10:11 +020053extern const int http_err_codes[HTTP_ERR_SIZE];
54extern struct chunk http_err_chunks[HTTP_ERR_SIZE];
55extern const char *HTTP_302;
56extern const char *HTTP_303;
Willy Tarreau7e2c6472012-10-29 20:44:36 +010057extern char *get_http_auth_buff;
Willy Tarreau436d9ed2011-05-11 16:10:11 +020058
Willy Tarreau8d5d7f22007-01-21 19:16:41 +010059#define HTTP_IS_CTL(x) (http_is_ctl[(unsigned char)(x)])
60#define HTTP_IS_SEP(x) (http_is_sep[(unsigned char)(x)])
61#define HTTP_IS_LWS(x) (http_is_lws[(unsigned char)(x)])
62#define HTTP_IS_SPHT(x) (http_is_spht[(unsigned char)(x)])
63#define HTTP_IS_CRLF(x) (http_is_crlf[(unsigned char)(x)])
64#define HTTP_IS_TOKEN(x) (http_is_token[(unsigned char)(x)])
Willy Tarreau4b89ad42007-03-04 18:13:58 +010065#define HTTP_IS_VER_TOKEN(x) (http_is_ver_token[(unsigned char)(x)])
Willy Tarreaubaaee002006-06-26 02:48:02 +020066
Willy Tarreau87b09662015-04-03 00:22:06 +020067int process_cli(struct stream *s);
68int process_srv_data(struct stream *s);
69int process_srv_conn(struct stream *s);
70int http_wait_for_request(struct stream *s, struct channel *req, int an_bit);
71int http_process_req_common(struct stream *s, struct channel *req, int an_bit, struct proxy *px);
72int http_process_request(struct stream *s, struct channel *req, int an_bit);
73int http_process_tarpit(struct stream *s, struct channel *req, int an_bit);
74int http_wait_for_request_body(struct stream *s, struct channel *req, int an_bit);
Willy Tarreau45c0d982012-03-09 12:11:57 +010075int http_send_name_header(struct http_txn *txn, struct proxy* be, const char* svr_name);
Willy Tarreau87b09662015-04-03 00:22:06 +020076int http_wait_for_response(struct stream *s, struct channel *rep, int an_bit);
77int http_process_res_common(struct stream *s, struct channel *rep, int an_bit, struct proxy *px);
78int http_request_forward_body(struct stream *s, struct channel *req, int an_bit);
79int http_response_forward_body(struct stream *s, struct channel *res, int an_bit);
Thierry FOURNIER8d16de02015-09-25 11:06:37 +020080void http_msg_analyzer(struct http_msg *msg, struct hdr_idx *idx);
Thierry FOURNIERfd50f0b2015-09-25 18:53:18 +020081void http_txn_reset_req(struct http_txn *txn);
82void http_txn_reset_res(struct http_txn *txn);
Willy Tarreaubaaee002006-06-26 02:48:02 +020083
Willy Tarreau87b09662015-04-03 00:22:06 +020084void debug_hdr(const char *dir, struct stream *s, const char *start, const char *end);
Willy Tarreau87b09662015-04-03 00:22:06 +020085int apply_filter_to_req_headers(struct stream *s, struct channel *req, struct hdr_exp *exp);
86int apply_filter_to_req_line(struct stream *s, struct channel *req, struct hdr_exp *exp);
87int apply_filters_to_request(struct stream *s, struct channel *req, struct proxy *px);
88int apply_filters_to_response(struct stream *s, struct channel *rtr, struct proxy *px);
Willy Tarreau87b09662015-04-03 00:22:06 +020089void manage_client_side_cookies(struct stream *s, struct channel *req);
90void manage_server_side_cookies(struct stream *s, struct channel *rtr);
91void check_response_for_cacheability(struct stream *s, struct channel *rtr);
Willy Tarreau295a8372011-03-10 11:25:07 +010092int stats_check_uri(struct stream_interface *si, struct http_txn *txn, struct proxy *backend);
Willy Tarreau80587432006-12-24 17:47:20 +010093void init_proto_http();
Willy Tarreau04ff9f12013-06-10 18:39:42 +020094int http_find_full_header2(const char *name, int len,
95 char *sol, struct hdr_idx *idx,
96 struct hdr_ctx *ctx);
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +020097int http_find_header2(const char *name, int len,
Willy Tarreau68085d82010-01-18 14:54:04 +010098 char *sol, struct hdr_idx *idx,
matt.farnsworth@nokia.com1c2ab962008-04-14 20:47:37 +020099 struct hdr_ctx *ctx);
David Carlier4686f792015-09-25 14:10:50 +0100100int http_find_next_header(char *sol, struct hdr_idx *idx,
101 struct hdr_ctx *ctx);
Thierry FOURNIERde6617b2013-10-15 11:43:19 +0200102char *find_hdr_value_end(char *s, const char *e);
David Carlier4686f792015-09-25 14:10:50 +0100103char *extract_cookie_value(char *hdr, const char *hdr_end, char *cookie_name,
104 size_t cookie_name_l, int list, char **value, int *value_l);
Thierry FOURNIERde6617b2013-10-15 11:43:19 +0200105int http_header_match2(const char *hdr, const char *end, const char *name, int len);
106int http_remove_header2(struct http_msg *msg, struct hdr_idx *idx, struct hdr_ctx *ctx);
107int http_header_add_tail2(struct http_msg *msg, struct hdr_idx *hdr_idx, const char *text, int len);
Willy Tarreau987e3fb2015-04-04 01:09:08 +0200108int http_replace_req_line(int action, const char *replace, int len, struct proxy *px, struct stream *s);
Thierry FOURNIER35d70ef2015-08-26 16:21:56 +0200109void http_set_status(unsigned int status, struct stream *s);
Willy Tarreau87b09662015-04-03 00:22:06 +0200110int http_transform_header_str(struct stream* s, struct http_msg *msg, const char* name,
Thierry FOURNIER5531f872015-03-16 11:15:50 +0100111 unsigned int name_len, const char *str, struct my_regex *re,
112 int action);
Thierry FOURNIER7fe75e02015-03-16 12:03:44 +0100113void inet_set_tos(int fd, struct sockaddr_storage from, int tos);
Willy Tarreau87b09662015-04-03 00:22:06 +0200114void http_perform_server_redirect(struct stream *s, struct stream_interface *si);
115void http_return_srv_error(struct stream *s, struct stream_interface *si);
116void http_capture_bad_message(struct error_snapshot *es, struct stream *s,
Willy Tarreau8a0cef22012-03-09 13:39:23 +0100117 struct http_msg *msg,
Willy Tarreau3770f232013-12-07 00:01:53 +0100118 enum ht_state state, struct proxy *other_end);
Willy Tarreau185b5c42012-04-26 15:11:51 +0200119unsigned int http_get_hdr(const struct http_msg *msg, const char *hname, int hlen,
Willy Tarreau294c4732011-12-16 21:35:50 +0100120 struct hdr_idx *idx, int occ,
121 struct hdr_ctx *ctx, char **vptr, int *vlen);
Thierry FOURNIER3c331782015-09-17 19:33:35 +0200122char *http_get_path(struct http_txn *txn);
Thierry FOURNIER127169e2015-09-18 17:59:23 +0200123const char *get_reason(unsigned int status);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200124
Willy Tarreaueee5b512015-04-03 23:46:31 +0200125struct http_txn *http_alloc_txn(struct stream *s);
Willy Tarreau87b09662015-04-03 00:22:06 +0200126void http_init_txn(struct stream *s);
127void http_end_txn(struct stream *s);
128void http_reset_txn(struct stream *s);
129void http_adjust_conn_mode(struct stream *s, struct http_txn *txn, struct http_msg *msg);
Willy Tarreau0937bc42009-12-22 15:03:09 +0100130
Thierry FOURNIERa28a9422015-08-04 19:35:46 +0200131struct act_rule *parse_http_req_cond(const char **args, const char *file, int linenum, struct proxy *proxy);
132struct act_rule *parse_http_res_cond(const char **args, const char *file, int linenum, struct proxy *proxy);
Willy Tarreauff011f22011-01-06 17:51:27 +0100133void free_http_req_rules(struct list *r);
Sasha Pachev218f0642014-06-16 12:05:59 -0600134void free_http_res_rules(struct list *r);
Willy Tarreau87b09662015-04-03 00:22:06 +0200135struct chunk *http_error_message(struct stream *s, int msgnum);
Thierry FOURNIERd18cd0f2013-11-29 12:15:45 +0100136struct redirect_rule *http_parse_redirect_rule(const char *file, int linenum, struct proxy *curproxy,
Willy Tarreaube4653b2015-05-28 15:26:58 +0200137 const char **args, char **errmsg, int use_fmt, int dir);
Thierry FOURNIER0786d052015-05-11 15:42:45 +0200138int smp_fetch_cookie(const struct arg *args, struct sample *smp, const char *kw, void *private);
139int smp_fetch_base32(const struct arg *args, struct sample *smp, const char *kw, void *private);
Willy Tarreauff011f22011-01-06 17:51:27 +0100140
Thierry FOURNIERd4373142013-12-17 01:10:10 +0100141enum http_meth_t find_http_meth(const char *str, const int len);
142
Thierry FOURNIER36481b82015-08-19 09:01:53 +0200143struct action_kw *action_http_req_custom(const char *kw);
144struct action_kw *action_http_res_custom(const char *kw);
Thierry FOURNIER49f45af2014-12-08 19:50:43 +0100145int val_hdr(struct arg *arg, char **err_msg);
William Lallemand73025dd2014-04-24 14:38:37 +0200146
James Rosewell91a41cb2015-09-18 17:11:16 +0100147int smp_prefetch_http(struct proxy *px, struct stream *s, unsigned int opt,
148 const struct arg *args, struct sample *smp, int req_vol);
149
150/* Note: these functions *do* modify the sample. Even in case of success, at
151 * least the type and uint value are modified.
152 */
153#define CHECK_HTTP_MESSAGE_FIRST() \
154 do { int r = smp_prefetch_http(smp->px, smp->strm, smp->opt, args, smp, 1); if (r <= 0) return r; } while (0)
155
156#define CHECK_HTTP_MESSAGE_FIRST_PERM() \
157 do { int r = smp_prefetch_http(smp->px, smp->strm, smp->opt, args, smp, 0); if (r <= 0) return r; } while (0)
158
Thierry FOURNIER36481b82015-08-19 09:01:53 +0200159static inline void http_req_keywords_register(struct action_kw_list *kw_list)
William Lallemand73025dd2014-04-24 14:38:37 +0200160{
161 LIST_ADDQ(&http_req_keywords.list, &kw_list->list);
162}
163
Thierry FOURNIER36481b82015-08-19 09:01:53 +0200164static inline void http_res_keywords_register(struct action_kw_list *kw_list)
William Lallemand73025dd2014-04-24 14:38:37 +0200165{
166 LIST_ADDQ(&http_res_keywords.list, &kw_list->list);
167}
168
169
Willy Tarreaufa355d42009-11-29 18:12:29 +0100170/* to be used when contents change in an HTTP message */
171#define http_msg_move_end(msg, bytes) do { \
172 unsigned int _bytes = (bytes); \
Willy Tarreaua458b672012-03-05 11:17:50 +0100173 (msg)->next += (_bytes); \
Willy Tarreaufa355d42009-11-29 18:12:29 +0100174 (msg)->sov += (_bytes); \
175 (msg)->eoh += (_bytes); \
176 } while (0)
177
Willy Tarreau2d8e4852014-04-17 20:08:17 +0200178
Willy Tarreau211cdec2014-04-17 20:18:08 +0200179/* Return the amount of bytes that need to be rewound before buf->p to access
180 * the current message's headers. The purpose is to be able to easily fetch
181 * the message's beginning before headers are forwarded, as well as after.
Willy Tarreau1234f4a2014-04-17 21:14:47 +0200182 * The principle is that msg->eoh and msg->eol are immutable while msg->sov
183 * equals the sum of the two before forwarding and is zero after forwarding,
184 * so the difference cancels the rewinding.
Willy Tarreau211cdec2014-04-17 20:18:08 +0200185 */
186static inline int http_hdr_rewind(const struct http_msg *msg)
187{
Willy Tarreau1234f4a2014-04-17 21:14:47 +0200188 return msg->eoh + msg->eol - msg->sov;
Willy Tarreau211cdec2014-04-17 20:18:08 +0200189}
190
Willy Tarreauda6eed62014-04-17 20:24:24 +0200191/* Return the amount of bytes that need to be rewound before buf->p to access
192 * the current message's URI. The purpose is to be able to easily fetch
193 * the message's beginning before headers are forwarded, as well as after.
194 */
195static inline int http_uri_rewind(const struct http_msg *msg)
196{
197 return http_hdr_rewind(msg) - msg->sl.rq.u;
198}
199
Willy Tarreau0d090502014-04-17 20:31:44 +0200200/* Return the amount of bytes that need to be rewound before buf->p to access
201 * the current message's BODY. The purpose is to be able to easily fetch
202 * the message's beginning before headers are forwarded, as well as after.
203 */
204static inline int http_body_rewind(const struct http_msg *msg)
205{
206 return http_hdr_rewind(msg) - msg->eoh - msg->eol;
207}
208
209/* Return the amount of bytes that need to be rewound before buf->p to access
210 * the current message's DATA. The difference with the function above is that
211 * if a chunk is present and has already been parsed, its size is skipped so
212 * that the byte pointed to is the first byte of actual data. The function is
213 * safe for use in state HTTP_MSG_DATA regardless of whether the headers were
214 * already forwarded or not.
215 */
216static inline int http_data_rewind(const struct http_msg *msg)
217{
218 return http_body_rewind(msg) - msg->sol;
219}
220
Willy Tarreau2d8e4852014-04-17 20:08:17 +0200221/* Return the maximum amount of bytes that may be read after the beginning of
222 * the message body, according to the advertised length. The function is safe
223 * for use between HTTP_MSG_BODY and HTTP_MSG_DATA regardless of whether the
224 * headers were already forwarded or not.
225 */
226static inline int http_body_bytes(const struct http_msg *msg)
227{
228 int len;
229
Willy Tarreau1234f4a2014-04-17 21:14:47 +0200230 len = msg->chn->buf->i - msg->sov - msg->sol;
Willy Tarreau2d8e4852014-04-17 20:08:17 +0200231 if (len > msg->body_len)
232 len = msg->body_len;
233 return len;
234}
235
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +0200236/* for an http-request action ACT_HTTP_REQ_TRK_*, return a tracking index
Willy Tarreau09448f72014-06-25 18:12:15 +0200237 * starting at zero for SC0. Unknown actions also return zero.
238 */
239static inline int http_req_trk_idx(int trk_action)
240{
Thierry FOURNIER0ea5c7f2015-08-05 19:05:19 +0200241 return trk_action - ACT_ACTION_TRK_SC0;
Willy Tarreau09448f72014-06-25 18:12:15 +0200242}
243
Willy Tarreau88c6d812012-11-21 21:50:04 +0100244/* for debugging, reports the HTTP message state name */
245static inline const char *http_msg_state_str(int msg_state)
246{
247 switch (msg_state) {
248 case HTTP_MSG_RQBEFORE: return "MSG_RQBEFORE";
249 case HTTP_MSG_RQBEFORE_CR: return "MSG_RQBEFORE_CR";
250 case HTTP_MSG_RQMETH: return "MSG_RQMETH";
251 case HTTP_MSG_RQMETH_SP: return "MSG_RQMETH_SP";
252 case HTTP_MSG_RQURI: return "MSG_RQURI";
253 case HTTP_MSG_RQURI_SP: return "MSG_RQURI_SP";
254 case HTTP_MSG_RQVER: return "MSG_RQVER";
255 case HTTP_MSG_RQLINE_END: return "MSG_RQLINE_END";
256 case HTTP_MSG_RPBEFORE: return "MSG_RPBEFORE";
257 case HTTP_MSG_RPBEFORE_CR: return "MSG_RPBEFORE_CR";
258 case HTTP_MSG_RPVER: return "MSG_RPVER";
259 case HTTP_MSG_RPVER_SP: return "MSG_RPVER_SP";
260 case HTTP_MSG_RPCODE: return "MSG_RPCODE";
261 case HTTP_MSG_RPCODE_SP: return "MSG_RPCODE_SP";
262 case HTTP_MSG_RPREASON: return "MSG_RPREASON";
263 case HTTP_MSG_RPLINE_END: return "MSG_RPLINE_END";
264 case HTTP_MSG_HDR_FIRST: return "MSG_HDR_FIRST";
265 case HTTP_MSG_HDR_NAME: return "MSG_HDR_NAME";
266 case HTTP_MSG_HDR_COL: return "MSG_HDR_COL";
267 case HTTP_MSG_HDR_L1_SP: return "MSG_HDR_L1_SP";
268 case HTTP_MSG_HDR_L1_LF: return "MSG_HDR_L1_LF";
269 case HTTP_MSG_HDR_L1_LWS: return "MSG_HDR_L1_LWS";
270 case HTTP_MSG_HDR_VAL: return "MSG_HDR_VAL";
271 case HTTP_MSG_HDR_L2_LF: return "MSG_HDR_L2_LF";
272 case HTTP_MSG_HDR_L2_LWS: return "MSG_HDR_L2_LWS";
273 case HTTP_MSG_LAST_LF: return "MSG_LAST_LF";
274 case HTTP_MSG_ERROR: return "MSG_ERROR";
275 case HTTP_MSG_BODY: return "MSG_BODY";
276 case HTTP_MSG_100_SENT: return "MSG_100_SENT";
277 case HTTP_MSG_CHUNK_SIZE: return "MSG_CHUNK_SIZE";
278 case HTTP_MSG_DATA: return "MSG_DATA";
279 case HTTP_MSG_CHUNK_CRLF: return "MSG_CHUNK_CRLF";
280 case HTTP_MSG_TRAILERS: return "MSG_TRAILERS";
281 case HTTP_MSG_DONE: return "MSG_DONE";
282 case HTTP_MSG_CLOSING: return "MSG_CLOSING";
283 case HTTP_MSG_CLOSED: return "MSG_CLOSED";
284 case HTTP_MSG_TUNNEL: return "MSG_TUNNEL";
285 default: return "MSG_??????";
286 }
287}
288
Willy Tarreaubaaee002006-06-26 02:48:02 +0200289#endif /* _PROTO_PROTO_HTTP_H */
290
291/*
292 * Local variables:
293 * c-indent-level: 8
294 * c-basic-offset: 8
295 * End:
296 */