| /* |
| * HTTP protocol analyzer |
| * |
| * Copyright (C) 2018 HAProxy Technologies, Christopher Faulet <cfaulet@haproxy.com> |
| * |
| * 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 <common/base64.h> |
| #include <common/config.h> |
| #include <common/debug.h> |
| #include <common/htx.h> |
| #include <common/uri_auth.h> |
| |
| #include <types/capture.h> |
| |
| #include <proto/acl.h> |
| #include <proto/action.h> |
| #include <proto/channel.h> |
| #include <proto/checks.h> |
| #include <proto/connection.h> |
| #include <proto/filters.h> |
| #include <proto/http_htx.h> |
| #include <proto/log.h> |
| #include <proto/pattern.h> |
| #include <proto/http_ana.h> |
| #include <proto/proxy.h> |
| #include <proto/server.h> |
| #include <proto/stream.h> |
| #include <proto/stream_interface.h> |
| #include <proto/stats.h> |
| #include <proto/vars.h> |
| |
| extern const char *stat_status_codes[]; |
| |
| struct pool_head *pool_head_requri = NULL; |
| struct pool_head *pool_head_capture = NULL; |
| |
| |
| static void http_end_request(struct stream *s); |
| static void http_end_response(struct stream *s); |
| |
| static void http_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr); |
| static int http_del_hdr_value(char *start, char *end, char **from, char *next); |
| static size_t http_fmt_req_line(const struct htx_sl *sl, char *str, size_t len); |
| static void http_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl); |
| static void http_debug_hdr(const char *dir, struct stream *s, const struct ist n, const struct ist v); |
| |
| static enum rule_result http_req_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s, int *deny_status); |
| static enum rule_result http_res_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s); |
| |
| static void http_manage_client_side_cookies(struct stream *s, struct channel *req); |
| static void http_manage_server_side_cookies(struct stream *s, struct channel *res); |
| |
| static int http_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend); |
| static int http_handle_stats(struct stream *s, struct channel *req); |
| |
| static int http_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg); |
| static int http_reply_100_continue(struct stream *s); |
| static int http_reply_40x_unauthorized(struct stream *s, const char *auth_realm); |
| |
| /* 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 stream *s, struct channel *req, int an_bit) |
| { |
| |
| /* |
| * We will analyze a complete HTTP request to check the its syntax. |
| * |
| * Once the start line and all headers are received, we may perform a |
| * capture of the error (if any), and we will set a few fields. We also |
| * check for monitor-uri, logging and finally headers capture. |
| */ |
| struct session *sess = s->sess; |
| struct http_txn *txn = s->txn; |
| struct http_msg *msg = &txn->req; |
| struct htx *htx; |
| struct htx_sl *sl; |
| |
| DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| req, |
| req->rex, req->wex, |
| req->flags, |
| ci_data(req), |
| req->analysers); |
| |
| htx = htxbuf(&req->buf); |
| |
| /* Parsing errors are caught here */ |
| if (htx->flags & HTX_FL_PARSING_ERROR) { |
| stream_inc_http_req_ctr(s); |
| stream_inc_http_err_ctr(s); |
| proxy_inc_fe_req_ctr(sess->fe); |
| goto return_bad_req; |
| } |
| |
| /* we're speaking HTTP here, so let's speak HTTP to the client */ |
| s->srv_error = http_return_srv_error; |
| |
| /* If there is data available for analysis, log the end of the idle time. */ |
| if (c_data(req) && s->logs.t_idle == -1) { |
| const struct cs_info *csinfo = si_get_cs_info(objt_cs(s->si[0].end)); |
| |
| s->logs.t_idle = ((csinfo) |
| ? csinfo->t_idle |
| : tv_ms_elapsed(&s->logs.tv_accept, &now) - s->logs.t_handshake); |
| } |
| |
| /* |
| * 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 stream, if we encounter and error, close, t/o, |
| * we note the error in the stream flags but don't set any state. |
| * Since the error will be noted there, it will not be counted by |
| * process_stream() 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(htx_is_empty(htx) || htx->first == -1)) { |
| if (htx->flags & HTX_FL_UPGRADE) |
| goto failed_keep_alive; |
| |
| /* 1: have we encountered a read error ? */ |
| if (req->flags & CF_READ_ERROR) { |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_CLICL; |
| |
| if (txn->flags & TX_WAIT_NEXT_RQ) |
| goto failed_keep_alive; |
| |
| if (sess->fe->options & PR_O_IGNORE_PRB) |
| goto failed_keep_alive; |
| |
| stream_inc_http_err_ctr(s); |
| stream_inc_http_req_ctr(s); |
| proxy_inc_fe_req_ctr(sess->fe); |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1); |
| |
| txn->status = 400; |
| msg->err_state = msg->msg_state; |
| msg->msg_state = HTTP_MSG_ERROR; |
| http_reply_and_close(s, txn->status, NULL); |
| req->analysers &= AN_REQ_FLT_END; |
| |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_R; |
| return 0; |
| } |
| |
| /* 2: has the read timeout expired ? */ |
| else if (req->flags & CF_READ_TIMEOUT || tick_is_expired(req->analyse_exp, now_ms)) { |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_CLITO; |
| |
| if (txn->flags & TX_WAIT_NEXT_RQ) |
| goto failed_keep_alive; |
| |
| if (sess->fe->options & PR_O_IGNORE_PRB) |
| goto failed_keep_alive; |
| |
| stream_inc_http_err_ctr(s); |
| stream_inc_http_req_ctr(s); |
| proxy_inc_fe_req_ctr(sess->fe); |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1); |
| |
| txn->status = 408; |
| msg->err_state = msg->msg_state; |
| msg->msg_state = HTTP_MSG_ERROR; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| req->analysers &= AN_REQ_FLT_END; |
| |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_R; |
| return 0; |
| } |
| |
| /* 3: have we encountered a close ? */ |
| else if (req->flags & CF_SHUTR) { |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_CLICL; |
| |
| if (txn->flags & TX_WAIT_NEXT_RQ) |
| goto failed_keep_alive; |
| |
| if (sess->fe->options & PR_O_IGNORE_PRB) |
| goto failed_keep_alive; |
| |
| stream_inc_http_err_ctr(s); |
| stream_inc_http_req_ctr(s); |
| proxy_inc_fe_req_ctr(sess->fe); |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1); |
| |
| txn->status = 400; |
| msg->err_state = msg->msg_state; |
| msg->msg_state = HTTP_MSG_ERROR; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| req->analysers &= AN_REQ_FLT_END; |
| |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_R; |
| return 0; |
| } |
| |
| channel_dont_connect(req); |
| req->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */ |
| s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */ |
| |
| if (sess->listener->options & LI_O_NOQUICKACK && htx_is_not_empty(htx) && |
| objt_conn(sess->origin) && conn_ctrl_ready(__objt_conn(sess->origin))) { |
| /* We need more data, we have to re-enable quick-ack in case we |
| * previously disabled it, otherwise we might cause the client |
| * to delay next data. |
| */ |
| conn_set_quickack(objt_conn(sess->origin), 1); |
| } |
| |
| if ((req->flags & CF_READ_PARTIAL) && (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 ((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 &= AN_REQ_FLT_END; |
| s->logs.logwait = 0; |
| s->logs.level = 0; |
| s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */ |
| http_reply_and_close(s, txn->status, NULL); |
| return 0; |
| } |
| |
| msg->msg_state = HTTP_MSG_BODY; |
| stream_inc_http_req_ctr(s); |
| proxy_inc_fe_req_ctr(sess->fe); /* one more valid request for this FE */ |
| |
| /* kill the pending keep-alive timeout */ |
| txn->flags &= ~TX_WAIT_NEXT_RQ; |
| req->analyse_exp = TICK_ETERNITY; |
| |
| BUG_ON(htx_get_first_type(htx) != HTX_BLK_REQ_SL); |
| sl = http_get_stline(htx); |
| |
| /* 0: we might have to print this header in debug mode */ |
| if (unlikely((global.mode & MODE_DEBUG) && |
| (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) { |
| int32_t pos; |
| |
| http_debug_stline("clireq", s, sl); |
| |
| for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) { |
| struct htx_blk *blk = htx_get_blk(htx, pos); |
| enum htx_blk_type type = htx_get_blk_type(blk); |
| |
| if (type == HTX_BLK_EOH) |
| break; |
| if (type != HTX_BLK_HDR) |
| continue; |
| |
| http_debug_hdr("clihdr", s, |
| htx_get_blk_name(htx, blk), |
| htx_get_blk_value(htx, blk)); |
| } |
| } |
| |
| /* |
| * 1: identify the method and the version. Also set HTTP flags |
| */ |
| txn->meth = sl->info.req.meth; |
| if (sl->flags & HTX_SL_F_VER_11) |
| msg->flags |= HTTP_MSGF_VER_11; |
| msg->flags |= HTTP_MSGF_XFER_LEN; |
| msg->flags |= ((sl->flags & HTX_SL_F_CLEN) ? HTTP_MSGF_CNT_LEN : HTTP_MSGF_TE_CHNK); |
| if (sl->flags & HTX_SL_F_BODYLESS) |
| msg->flags |= HTTP_MSGF_BODYLESS; |
| |
| /* we can make use of server redirect on GET and HEAD */ |
| if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD) |
| s->flags |= SF_REDIRECTABLE; |
| else if (txn->meth == HTTP_METH_OTHER && isteqi(htx_sl_req_meth(sl), ist("PRI"))) { |
| /* PRI is reserved for the HTTP/2 preface */ |
| goto return_bad_req; |
| } |
| |
| /* |
| * 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((sess->fe->monitor_uri_len != 0) && |
| isteqi(htx_sl_req_uri(sl), ist2(sess->fe->monitor_uri, sess->fe->monitor_uri_len)))) { |
| /* |
| * We have found the monitor URI |
| */ |
| struct acl_cond *cond; |
| |
| s->flags |= SF_MONITOR; |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1); |
| |
| /* Check if we want to fail this monitor request or not */ |
| list_for_each_entry(cond, &sess->fe->mon_fail_cond, list) { |
| int ret = acl_exec_cond(cond, sess->fe, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL); |
| |
| 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; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */ |
| goto return_prx_cond; |
| } |
| } |
| |
| /* nothing to fail, let's reply normally */ |
| txn->status = 200; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */ |
| 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_alloc(pool_head_requri)) != NULL) { |
| size_t len; |
| |
| len = http_fmt_req_line(sl, txn->uri, global.tune.requri_len - 1); |
| txn->uri[len] = 0; |
| |
| if (!(s->logs.logwait &= ~(LW_REQ|LW_INIT))) |
| s->do_log(s); |
| } else { |
| ha_alert("HTTP logging : out of memory.\n"); |
| } |
| } |
| |
| /* 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 ((sess->fe->options2 & PR_O2_USE_PXHDR) && |
| *HTX_SL_REQ_UPTR(sl) != '/' && *HTX_SL_REQ_UPTR(sl) != '*') |
| txn->flags |= TX_USE_PX_CONN; |
| |
| /* 5: we may need to capture headers */ |
| if (unlikely((s->logs.logwait & LW_REQHDR) && s->req_cap)) |
| http_capture_headers(htx, s->req_cap, sess->fe->req_cap); |
| |
| /* we may have to wait for the request's body */ |
| if (s->be->options & PR_O_WREQ_BODY) |
| req->analysers |= AN_REQ_HTTP_BODY; |
| |
| /* |
| * RFC7234#4: |
| * A cache MUST write through requests with methods |
| * that are unsafe (Section 4.2.1 of [RFC7231]) to |
| * the origin server; i.e., a cache is not allowed |
| * to generate a reply to such a request before |
| * having forwarded the request and having received |
| * a corresponding response. |
| * |
| * RFC7231#4.2.1: |
| * Of the request methods defined by this |
| * specification, the GET, HEAD, OPTIONS, and TRACE |
| * methods are defined to be safe. |
| */ |
| if (likely(txn->meth == HTTP_METH_GET || |
| txn->meth == HTTP_METH_HEAD || |
| txn->meth == HTTP_METH_OPTIONS || |
| txn->meth == HTTP_METH_TRACE)) |
| txn->flags |= TX_CACHEABLE | TX_CACHE_COOK; |
| |
| /* end of job, return OK */ |
| req->analysers &= ~an_bit; |
| req->analyse_exp = TICK_ETERNITY; |
| |
| return 1; |
| |
| return_bad_req: |
| txn->status = 400; |
| txn->req.err_state = txn->req.msg_state; |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1); |
| |
| return_prx_cond: |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_PRXCOND; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_R; |
| |
| req->analysers &= AN_REQ_FLT_END; |
| req->analyse_exp = TICK_ETERNITY; |
| 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 stream *s, struct channel *req, int an_bit, struct proxy *px) |
| { |
| struct session *sess = s->sess; |
| struct http_txn *txn = s->txn; |
| struct http_msg *msg = &txn->req; |
| struct htx *htx; |
| struct redirect_rule *rule; |
| enum rule_result verdict; |
| int deny_status = HTTP_ERR_403; |
| struct connection *conn = objt_conn(sess->origin); |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) { |
| /* we need more data */ |
| goto return_prx_yield; |
| } |
| |
| DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| req, |
| req->rex, req->wex, |
| req->flags, |
| ci_data(req), |
| req->analysers); |
| |
| htx = htxbuf(&req->buf); |
| |
| /* just in case we have some per-backend tracking. Only called the first |
| * execution of the analyser. */ |
| if (!s->current_rule || s->current_rule_list != &px->http_req_rules) |
| stream_inc_be_http_req_ctr(s); |
| |
| /* evaluate http-request rules */ |
| if (!LIST_ISEMPTY(&px->http_req_rules)) { |
| verdict = http_req_get_intercept_rule(px, &px->http_req_rules, s, &deny_status); |
| |
| switch (verdict) { |
| case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */ |
| goto return_prx_yield; |
| |
| case HTTP_RULE_RES_CONT: |
| case HTTP_RULE_RES_STOP: /* nothing to do */ |
| break; |
| |
| case HTTP_RULE_RES_DENY: /* deny or tarpit */ |
| if (txn->flags & TX_CLTARPIT) |
| goto tarpit; |
| goto deny; |
| |
| case HTTP_RULE_RES_ABRT: /* abort request, response already sent. Eg: auth */ |
| goto return_prx_cond; |
| |
| case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */ |
| goto done; |
| |
| case HTTP_RULE_RES_BADREQ: /* failed with a bad request */ |
| goto return_bad_req; |
| } |
| } |
| |
| if (conn && (conn->flags & CO_FL_EARLY_DATA) && |
| (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_HANDSHAKE))) { |
| struct http_hdr_ctx ctx; |
| |
| ctx.blk = NULL; |
| if (!http_find_header(htx, ist("Early-Data"), &ctx, 0)) { |
| if (unlikely(!http_add_header(htx, ist("Early-Data"), ist("1")))) |
| goto return_bad_req; |
| } |
| } |
| |
| /* OK at this stage, we know that the request was accepted according to |
| * the http-request rules, we can check for the stats. Note that the |
| * URI is detected *before* the req* rules in order not to be affected |
| * by a possible reqrep, while they are processed *after* so that a |
| * reqdeny can still block them. This clearly needs to change in 1.6! |
| */ |
| if (!s->target && http_stats_check_uri(s, txn, px)) { |
| s->target = &http_stats_applet.obj_type; |
| if (unlikely(!si_register_handler(&s->si[1], objt_applet(s->target)))) { |
| txn->status = 500; |
| s->logs.tv_request = now; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_RESOURCE; |
| goto return_prx_cond; |
| } |
| |
| /* parse the whole stats request and extract the relevant information */ |
| http_handle_stats(s, req); |
| verdict = http_req_get_intercept_rule(px, &px->uri_auth->http_req_rules, s, &deny_status); |
| /* not all actions implemented: deny, allow, auth */ |
| |
| if (verdict == HTTP_RULE_RES_DENY) /* stats http-request deny */ |
| goto deny; |
| |
| if (verdict == HTTP_RULE_RES_ABRT) /* stats auth / stats http-request auth */ |
| goto return_prx_cond; |
| } |
| |
| /* Proceed with the applets now. */ |
| if (unlikely(objt_applet(s->target))) { |
| if (sess->fe == s->be) /* report it if the request was intercepted by the frontend */ |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1); |
| |
| if (http_handle_expect_hdr(s, htx, msg) == -1) |
| goto return_bad_req; |
| |
| if (!(s->flags & SF_ERR_MASK)) // this is not really an error but it is |
| s->flags |= SF_ERR_LOCAL; // to mark that it comes from the proxy |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_R; |
| |
| /* enable the minimally required analyzers to handle keep-alive and compression on the HTTP response */ |
| req->analysers &= (AN_REQ_HTTP_BODY | AN_REQ_FLT_HTTP_HDRS | AN_REQ_FLT_END); |
| req->analysers &= ~AN_REQ_FLT_XFER_DATA; |
| req->analysers |= AN_REQ_HTTP_XFER_BODY; |
| |
| req->flags |= CF_SEND_DONTWAIT; |
| s->flags |= SF_ASSIGNED; |
| goto done; |
| } |
| |
| /* check whether we have some ACLs set to redirect this request */ |
| list_for_each_entry(rule, &px->redirect_rules, list) { |
| if (rule->cond) { |
| int ret; |
| |
| ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL); |
| ret = acl_pass(ret); |
| if (rule->cond->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| if (!ret) |
| continue; |
| } |
| if (!http_apply_redirect_rule(rule, s, txn)) |
| goto return_bad_req; |
| goto done; |
| } |
| |
| /* 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 |
| * CF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove |
| * itself once used. |
| */ |
| req->flags |= CF_SEND_DONTWAIT; |
| |
| done: /* done with this analyser, continue with next ones that the calling |
| * points will have set, if any. |
| */ |
| req->analyse_exp = TICK_ETERNITY; |
| done_without_exp: /* done with this analyser, but dont reset the analyse_exp. */ |
| req->analysers &= ~an_bit; |
| return 1; |
| |
| tarpit: |
| /* Allow cookie logging |
| */ |
| if (s->be->cookie_name || sess->fe->capture_name) |
| http_manage_client_side_cookies(s, req); |
| |
| /* 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. |
| */ |
| channel_htx_erase(&s->req, htx); |
| |
| /* wipe the request out so that we can drop the connection early |
| * if the client closes first. |
| */ |
| channel_dont_connect(req); |
| |
| txn->status = http_err_codes[deny_status]; |
| |
| req->analysers &= AN_REQ_FLT_END; /* 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); |
| stream_inc_http_err_ctr(s); |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1); |
| if (sess->fe != s->be) |
| _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1); |
| goto done_without_exp; |
| |
| deny: /* this request was blocked (denied) */ |
| |
| /* Allow cookie logging |
| */ |
| if (s->be->cookie_name || sess->fe->capture_name) |
| http_manage_client_side_cookies(s, req); |
| |
| txn->flags |= TX_CLDENY; |
| txn->status = http_err_codes[deny_status]; |
| s->logs.tv_request = now; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| stream_inc_http_err_ctr(s); |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1); |
| if (sess->fe != s->be) |
| _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1); |
| goto return_prx_cond; |
| |
| return_bad_req: |
| txn->req.err_state = txn->req.msg_state; |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| txn->status = 400; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1); |
| |
| return_prx_cond: |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_PRXCOND; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_R; |
| |
| req->analysers &= AN_REQ_FLT_END; |
| req->analyse_exp = TICK_ETERNITY; |
| return 0; |
| |
| return_prx_yield: |
| channel_dont_connect(req); |
| 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 stream *s, struct channel *req, int an_bit) |
| { |
| struct session *sess = s->sess; |
| struct http_txn *txn = s->txn; |
| struct http_msg *msg = &txn->req; |
| struct htx *htx; |
| struct connection *cli_conn = objt_conn(strm_sess(s)->origin); |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) { |
| /* we need more data */ |
| channel_dont_connect(req); |
| return 0; |
| } |
| |
| DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| req, |
| req->rex, req->wex, |
| req->flags, |
| ci_data(req), |
| 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. |
| */ |
| htx = htxbuf(&req->buf); |
| |
| /* |
| * If HTTP PROXY is set we simply get remote server address parsing |
| * incoming request. |
| */ |
| if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SF_ADDR_SET)) { |
| struct htx_sl *sl; |
| struct ist uri, path; |
| |
| if (!sockaddr_alloc(&s->target_addr)) { |
| txn->req.err_state = txn->req.msg_state; |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| txn->status = 500; |
| req->analysers &= AN_REQ_FLT_END; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_RESOURCE; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_R; |
| |
| return 0; |
| } |
| sl = http_get_stline(htx); |
| uri = htx_sl_req_uri(sl); |
| path = http_get_path(uri); |
| |
| if (url2sa(uri.ptr, uri.len - path.len, s->target_addr, NULL) == -1) |
| goto return_bad_req; |
| |
| s->target = &s->be->obj_type; |
| s->flags |= SF_ADDR_SET | SF_ASSIGNED; |
| |
| /* if the path was found, we have to remove everything between |
| * uri.ptr and path.ptr (excluded). If it was not found, we need |
| * to replace from all the uri by a single "/". |
| * |
| * Instead of rewritting the whole start line, we just update |
| * the star-line URI. Some space will be lost but it should be |
| * insignificant. |
| */ |
| istcpy(&uri, (path.len ? path : ist("/")), uri.len); |
| } |
| |
| /* |
| * 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 || sess->fe->capture_name) |
| http_manage_client_side_cookies(s, req); |
| |
| /* add unique-id if "header-unique-id" is specified */ |
| |
| if (!LIST_ISEMPTY(&sess->fe->format_unique_id) && !s->unique_id) { |
| if ((s->unique_id = pool_alloc(pool_head_uniqueid)) == NULL) |
| goto return_bad_req; |
| s->unique_id[0] = '\0'; |
| build_logline(s, s->unique_id, UNIQUEID_LEN, &sess->fe->format_unique_id); |
| } |
| |
| if (sess->fe->header_unique_id && s->unique_id) { |
| struct ist n = ist2(sess->fe->header_unique_id, strlen(sess->fe->header_unique_id)); |
| struct ist v = ist2(s->unique_id, strlen(s->unique_id)); |
| |
| if (unlikely(!http_add_header(htx, n, v))) |
| goto return_bad_req; |
| } |
| |
| /* |
| * 9: add X-Forwarded-For if either the frontend or the backend |
| * asks for it. |
| */ |
| if ((sess->fe->options | s->be->options) & PR_O_FWDFOR) { |
| struct http_hdr_ctx ctx = { .blk = NULL }; |
| struct ist hdr = ist2(s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_name : sess->fe->fwdfor_hdr_name, |
| s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_len : sess->fe->fwdfor_hdr_len); |
| |
| if (!((sess->fe->options | s->be->options) & PR_O_FF_ALWAYS) && |
| http_find_header(htx, hdr, &ctx, 0)) { |
| /* The header is set to be added only if none is present |
| * and we found it, so don't do anything. |
| */ |
| } |
| else if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET) { |
| /* Add an X-Forwarded-For header unless the source IP is |
| * in the 'except' network range. |
| */ |
| if ((!sess->fe->except_mask.s_addr || |
| (((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr & sess->fe->except_mask.s_addr) |
| != sess->fe->except_net.s_addr) && |
| (!s->be->except_mask.s_addr || |
| (((struct sockaddr_in *)cli_conn->src)->sin_addr.s_addr & s->be->except_mask.s_addr) |
| != s->be->except_net.s_addr)) { |
| unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)cli_conn->src)->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. |
| */ |
| chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]); |
| if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data)))) |
| goto return_bad_req; |
| } |
| } |
| else if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET6) { |
| /* FIXME: for the sake of completeness, we should also support |
| * 'except' here, although it is mostly useless in this case. |
| */ |
| char pn[INET6_ADDRSTRLEN]; |
| |
| inet_ntop(AF_INET6, |
| (const void *)&((struct sockaddr_in6 *)(cli_conn->src))->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. |
| */ |
| chunk_printf(&trash, "%s", pn); |
| if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data)))) |
| goto return_bad_req; |
| } |
| } |
| |
| /* |
| * 10: add X-Original-To if either the frontend or the backend |
| * asks for it. |
| */ |
| if ((sess->fe->options | s->be->options) & PR_O_ORGTO) { |
| |
| /* FIXME: don't know if IPv6 can handle that case too. */ |
| if (cli_conn && conn_get_src(cli_conn) && cli_conn->src->ss_family == AF_INET && conn_get_dst(cli_conn)) { |
| /* Add an X-Original-To header unless the destination IP is |
| * in the 'except' network range. |
| */ |
| if (cli_conn->dst->ss_family == AF_INET && |
| ((!sess->fe->except_mask_to.s_addr || |
| (((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr & sess->fe->except_mask_to.s_addr) |
| != sess->fe->except_to.s_addr) && |
| (!s->be->except_mask_to.s_addr || |
| (((struct sockaddr_in *)cli_conn->dst)->sin_addr.s_addr & s->be->except_mask_to.s_addr) |
| != s->be->except_to.s_addr))) { |
| struct ist hdr; |
| unsigned char *pn = (unsigned char *)&((struct sockaddr_in *)cli_conn->dst)->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) |
| hdr = ist2(s->be->orgto_hdr_name, s->be->orgto_hdr_len); |
| else |
| hdr = ist2(sess->fe->orgto_hdr_name, sess->fe->orgto_hdr_len); |
| |
| chunk_printf(&trash, "%d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]); |
| if (unlikely(!http_add_header(htx, hdr, ist2(trash.area, trash.data)))) |
| goto return_bad_req; |
| } |
| } |
| } |
| |
| /* 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 & (SF_ASSIGNED|SF_DIRECT)) && |
| s->txn->meth == HTTP_METH_POST && |
| (s->be->lbprm.algo & BE_LB_ALGO) == BE_LB_ALGO_PH) { |
| channel_dont_connect(req); |
| req->analysers |= AN_REQ_HTTP_BODY; |
| } |
| |
| req->analysers &= ~AN_REQ_FLT_XFER_DATA; |
| req->analysers |= AN_REQ_HTTP_XFER_BODY; |
| |
| /* We expect some data from the client. Unless we know for sure |
| * we already have a full request, we have to re-enable quick-ack |
| * in case we previously disabled it, otherwise we might cause |
| * the client to delay further data. |
| */ |
| if ((sess->listener->options & LI_O_NOQUICKACK) && |
| (htx_get_tail_type(htx) != HTX_BLK_EOM)) |
| conn_set_quickack(cli_conn, 1); |
| |
| /************************************************************* |
| * 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 */ |
| txn->req.err_state = txn->req.msg_state; |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| txn->status = 400; |
| req->analysers &= AN_REQ_FLT_END; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1); |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_PRXCOND; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_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 stream *s, struct channel *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. |
| */ |
| channel_dont_connect(req); |
| if ((req->flags & (CF_SHUTR|CF_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); |
| |
| if (!(req->flags & CF_READ_ERROR)) |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| |
| req->analysers &= AN_REQ_FLT_END; |
| req->analyse_exp = TICK_ETERNITY; |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_PRXCOND; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_T; |
| return 0; |
| } |
| |
| /* This function is an analyser which waits for the HTTP request body. It waits |
| * for either the buffer to be full, or the full advertised contents to have |
| * reached the buffer. It must only be called after the standard HTTP request |
| * processing has occurred, because it expects the request to be parsed and will |
| * look for the Expect header. It may send a 100-Continue interim response. It |
| * takes in input any state starting from HTTP_MSG_BODY and leaves with one of |
| * HTTP_MSG_CHK_SIZE, HTTP_MSG_DATA or HTTP_MSG_TRAILERS. It returns zero if it |
| * needs to read more data, or 1 once it has completed its analysis. |
| */ |
| int http_wait_for_request_body(struct stream *s, struct channel *req, int an_bit) |
| { |
| struct session *sess = s->sess; |
| struct http_txn *txn = s->txn; |
| struct http_msg *msg = &s->txn->req; |
| struct htx *htx; |
| |
| |
| DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| req, |
| req->rex, req->wex, |
| req->flags, |
| ci_data(req), |
| req->analysers); |
| |
| htx = htxbuf(&req->buf); |
| |
| if (htx->flags & HTX_FL_PARSING_ERROR) |
| goto return_bad_req; |
| |
| if (msg->msg_state < HTTP_MSG_BODY) |
| goto missing_data; |
| |
| /* 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 (msg->msg_state < HTTP_MSG_DATA) { |
| if (http_handle_expect_hdr(s, htx, msg) == -1) |
| goto return_bad_req; |
| } |
| |
| msg->msg_state = HTTP_MSG_DATA; |
| |
| /* Now we're in HTTP_MSG_DATA. We just need to know if all data have |
| * been received or if the buffer is full. |
| */ |
| if (htx_get_tail_type(htx) > HTX_BLK_DATA || |
| channel_htx_full(req, htx, global.tune.maxrewrite)) |
| goto http_end; |
| |
| missing_data: |
| if ((req->flags & CF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) { |
| txn->status = 408; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_CLITO; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_D; |
| goto return_err_msg; |
| } |
| |
| /* we get here if we need to wait for more data */ |
| if (!(req->flags & (CF_SHUTR | CF_READ_ERROR))) { |
| /* 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. |
| */ |
| channel_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.err_state = txn->req.msg_state; |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| txn->status = 400; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_PRXCOND; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_R; |
| |
| return_err_msg: |
| req->analysers &= AN_REQ_FLT_END; |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1); |
| return 0; |
| } |
| |
| /* 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 stream. |
| * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len |
| * bytes of pending data + the headers if not already done. |
| */ |
| int http_request_forward_body(struct stream *s, struct channel *req, int an_bit) |
| { |
| struct session *sess = s->sess; |
| struct http_txn *txn = s->txn; |
| struct http_msg *msg = &txn->req; |
| struct htx *htx; |
| short status = 0; |
| int ret; |
| |
| DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| req, |
| req->rex, req->wex, |
| req->flags, |
| ci_data(req), |
| req->analysers); |
| |
| htx = htxbuf(&req->buf); |
| |
| if ((req->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) || |
| ((req->flags & CF_SHUTW) && (req->to_forward || co_data(req)))) { |
| /* Output closed while we were sending data. We must abort and |
| * wake the other side up. |
| */ |
| /* Don't abort yet if we had L7 retries activated and it |
| * was a write error, we may recover. |
| */ |
| if (!(req->flags & (CF_READ_ERROR | CF_READ_TIMEOUT)) && |
| (s->si[1].flags & SI_FL_L7_RETRY)) |
| return 0; |
| msg->err_state = msg->msg_state; |
| msg->msg_state = HTTP_MSG_ERROR; |
| http_end_request(s); |
| http_end_response(s); |
| return 1; |
| } |
| |
| /* 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_BODY) |
| msg->msg_state = HTTP_MSG_DATA; |
| |
| /* in most states, we should abort in case of early close */ |
| channel_auto_close(req); |
| |
| if (req->to_forward) { |
| if (req->to_forward == CHN_INFINITE_FORWARD) { |
| if (req->flags & (CF_SHUTR|CF_EOI)) { |
| msg->msg_state = HTTP_MSG_DONE; |
| req->to_forward = 0; |
| goto done; |
| } |
| } |
| else { |
| /* We can't process the buffer's contents yet */ |
| req->flags |= CF_WAKE_WRITE; |
| goto missing_data_or_waiting; |
| } |
| } |
| |
| if (msg->msg_state >= HTTP_MSG_DONE) |
| goto done; |
| /* Forward input data. We get it by removing all outgoing data not |
| * forwarded yet from HTX data size. If there are some data filters, we |
| * let them decide the amount of data to forward. |
| */ |
| if (HAS_REQ_DATA_FILTERS(s)) { |
| ret = flt_http_payload(s, msg, htx->data); |
| if (ret < 0) |
| goto return_bad_req; |
| c_adv(req, ret); |
| } |
| else { |
| c_adv(req, htx->data - co_data(req)); |
| if (msg->flags & HTTP_MSGF_XFER_LEN) |
| channel_htx_forward_forever(req, htx); |
| } |
| |
| if (txn->meth == HTTP_METH_CONNECT) { |
| msg->msg_state = HTTP_MSG_TUNNEL; |
| goto done; |
| } |
| |
| |
| /* Check if the end-of-message is reached and if so, switch the message |
| * in HTTP_MSG_ENDING state. Then if all data was marked to be |
| * forwarded, set the state to HTTP_MSG_DONE. |
| */ |
| if (htx_get_tail_type(htx) != HTX_BLK_EOM) |
| goto missing_data_or_waiting; |
| |
| msg->msg_state = HTTP_MSG_ENDING; |
| if (htx->data != co_data(req)) |
| goto missing_data_or_waiting; |
| msg->msg_state = HTTP_MSG_DONE; |
| req->to_forward = 0; |
| |
| done: |
| /* other states, DONE...TUNNEL */ |
| /* we don't want to forward closes on DONE except in tunnel mode. */ |
| if (!(txn->flags & TX_CON_WANT_TUN)) |
| channel_dont_close(req); |
| |
| if (HAS_REQ_DATA_FILTERS(s)) { |
| ret = flt_http_end(s, msg); |
| if (ret <= 0) { |
| if (!ret) |
| goto missing_data_or_waiting; |
| goto return_bad_req; |
| } |
| } |
| |
| http_end_request(s); |
| if (!(req->analysers & an_bit)) { |
| http_end_response(s); |
| if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) { |
| if (req->flags & CF_SHUTW) { |
| /* request errors are most likely due to the |
| * server aborting the transfer. */ |
| goto return_srv_abort; |
| } |
| 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. We only do that in tunnel mode, and not in other modes since |
| * it can be abused to exhaust source ports. */ |
| if (s->be->options & PR_O_ABRT_CLOSE) { |
| channel_auto_read(req); |
| if ((req->flags & (CF_SHUTR|CF_READ_NULL)) && !(txn->flags & TX_CON_WANT_TUN)) |
| s->si[1].flags |= SI_FL_NOLINGER; |
| channel_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). */ |
| channel_auto_read(req); |
| } |
| return 0; |
| |
| missing_data_or_waiting: |
| /* stop waiting for data if the input is closed before the end */ |
| if (msg->msg_state < HTTP_MSG_ENDING && req->flags & CF_SHUTR) |
| goto return_cli_abort; |
| |
| waiting: |
| /* waiting for the last bits to leave the buffer */ |
| if (req->flags & CF_SHUTW) |
| goto return_srv_abort; |
| |
| if (htx->flags & HTX_FL_PARSING_ERROR) |
| goto return_bad_req; |
| |
| /* 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 CF_DONTCLOSE. |
| * And when content-length is used, we never want to let the possible |
| * shutdown be forwarded to the other side, as the state machine will |
| * take care of it once the client responds. It's also important to |
| * prevent TIME_WAITs from accumulating on the backend side, and for |
| * HTTP/2 where the last frame comes with a shutdown. |
| */ |
| if (msg->flags & HTTP_MSGF_XFER_LEN) |
| channel_dont_close(req); |
| |
| /* We know that more data are expected, but we couldn't send more that |
| * what we did. So we always set the CF_EXPECT_MORE flag so that the |
| * system knows it must not set a PUSH on this first part. Interactive |
| * modes are already handled by the stream sock layer. We must not do |
| * this in content-length mode because it could present the MSG_MORE |
| * flag with the last block of forwarded data, which would cause an |
| * additional delay to be observed by the receiver. |
| */ |
| if (msg->flags & HTTP_MSGF_TE_CHNK) |
| req->flags |= CF_EXPECT_MORE; |
| |
| return 0; |
| |
| return_cli_abort: |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1); |
| _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1); |
| if (objt_server(s->target)) |
| _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1); |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_CLICL; |
| status = 400; |
| goto return_error; |
| |
| return_srv_abort: |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1); |
| _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1); |
| if (objt_server(s->target)) |
| _HA_ATOMIC_ADD(&objt_server(s->target)->counters.srv_aborts, 1); |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_SRVCL; |
| status = 502; |
| goto return_error; |
| |
| return_bad_req: |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1); |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_CLICL; |
| status = 400; |
| |
| return_error: |
| txn->req.err_state = txn->req.msg_state; |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| if (txn->status > 0) { |
| /* Note: we don't send any error if some data were already sent */ |
| http_reply_and_close(s, txn->status, NULL); |
| } else { |
| txn->status = status; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| } |
| req->analysers &= AN_REQ_FLT_END; |
| s->res.analysers &= AN_RES_FLT_END; /* we're in data phase, we want to abort both directions */ |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= ((txn->rsp.msg_state < HTTP_MSG_ERROR) ? SF_FINST_H : SF_FINST_D); |
| return 0; |
| } |
| |
| /* Reset the stream and the backend stream_interface to a situation suitable for attemption connection */ |
| /* Returns 0 if we can attempt to retry, -1 otherwise */ |
| static __inline int do_l7_retry(struct stream *s, struct stream_interface *si) |
| { |
| struct channel *req, *res; |
| int co_data; |
| |
| si->conn_retries--; |
| if (si->conn_retries < 0) |
| return -1; |
| |
| if (objt_server(s->target)) |
| _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.retries, 1); |
| _HA_ATOMIC_ADD(&s->be->be_counters.retries, 1); |
| |
| req = &s->req; |
| res = &s->res; |
| /* Remove any write error from the request, and read error from the response */ |
| req->flags &= ~(CF_WRITE_ERROR | CF_WRITE_TIMEOUT | CF_SHUTW | CF_SHUTW_NOW); |
| res->flags &= ~(CF_READ_ERROR | CF_READ_TIMEOUT | CF_SHUTR | CF_EOI | CF_READ_NULL | CF_SHUTR_NOW); |
| res->analysers = 0; |
| si->flags &= ~(SI_FL_ERR | SI_FL_EXP | SI_FL_RXBLK_SHUT); |
| stream_choose_redispatch(s); |
| si->exp = TICK_ETERNITY; |
| res->rex = TICK_ETERNITY; |
| res->to_forward = 0; |
| res->analyse_exp = TICK_ETERNITY; |
| res->total = 0; |
| s->flags &= ~(SF_ERR_SRVTO | SF_ERR_SRVCL); |
| si_release_endpoint(&s->si[1]); |
| b_free(&req->buf); |
| /* Swap the L7 buffer with the channel buffer */ |
| /* We know we stored the co_data as b_data, so get it there */ |
| co_data = b_data(&si->l7_buffer); |
| b_set_data(&si->l7_buffer, b_size(&si->l7_buffer)); |
| b_xfer(&req->buf, &si->l7_buffer, b_data(&si->l7_buffer)); |
| |
| co_set_data(req, co_data); |
| b_reset(&res->buf); |
| co_set_data(res, 0); |
| 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->res.analysers |
| * when it has nothing left to do, and may remove any analyser when it wants to |
| * abort. |
| */ |
| int http_wait_for_response(struct stream *s, struct channel *rep, int an_bit) |
| { |
| /* |
| * We will analyze a complete HTTP response to check the its syntax. |
| * |
| * Once the start line and all headers are received, we may perform a |
| * capture of the error (if any), and we will set a few fields. We also |
| * logging and finally headers capture. |
| */ |
| struct session *sess = s->sess; |
| struct http_txn *txn = s->txn; |
| struct http_msg *msg = &txn->rsp; |
| struct htx *htx; |
| struct stream_interface *si_b = &s->si[1]; |
| struct connection *srv_conn; |
| struct htx_sl *sl; |
| int n; |
| |
| DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| rep, |
| rep->rex, rep->wex, |
| rep->flags, |
| ci_data(rep), |
| rep->analysers); |
| |
| htx = htxbuf(&rep->buf); |
| |
| /* Parsing errors are caught here */ |
| if (htx->flags & HTX_FL_PARSING_ERROR) |
| goto return_bad_res; |
| |
| /* |
| * 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. |
| */ |
| next_one: |
| if (unlikely(htx_is_empty(htx) || htx->first == -1)) { |
| /* 1: have we encountered a read error ? */ |
| if (rep->flags & CF_READ_ERROR) { |
| struct connection *conn = NULL; |
| |
| if (objt_cs(s->si[1].end)) |
| conn = objt_cs(s->si[1].end)->conn; |
| |
| if (si_b->flags & SI_FL_L7_RETRY && |
| (!conn || conn->err_code != CO_ER_SSL_EARLY_FAILED)) { |
| /* If we arrive here, then CF_READ_ERROR was |
| * set by si_cs_recv() because we matched a |
| * status, overwise it would have removed |
| * the SI_FL_L7_RETRY flag, so it's ok not |
| * to check s->be->retry_type. |
| */ |
| if (co_data(rep) || do_l7_retry(s, si_b) == 0) |
| return 0; |
| } |
| |
| if (txn->flags & TX_NOT_FIRST) |
| goto abort_keep_alive; |
| |
| _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1); |
| if (objt_server(s->target)) { |
| _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1); |
| health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_ERROR); |
| } |
| |
| rep->analysers &= AN_RES_FLT_END; |
| txn->status = 502; |
| |
| /* Check to see if the server refused the early data. |
| * If so, just send a 425 |
| */ |
| if (conn->err_code == CO_ER_SSL_EARLY_FAILED) { |
| if ((s->be->retry_type & PR_RE_EARLY_ERROR) && |
| (si_b->flags & SI_FL_L7_RETRY) && |
| do_l7_retry(s, si_b) == 0) |
| return 0; |
| txn->status = 425; |
| } |
| |
| s->si[1].flags |= SI_FL_NOLINGER; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_SRVCL; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_H; |
| return 0; |
| } |
| |
| /* 2: read timeout : return a 504 to the client. */ |
| else if (rep->flags & CF_READ_TIMEOUT) { |
| if ((si_b->flags & SI_FL_L7_RETRY) && |
| (s->be->retry_type & PR_RE_TIMEOUT)) { |
| if (co_data(rep) || do_l7_retry(s, si_b) == 0) |
| return 0; |
| } |
| _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1); |
| if (objt_server(s->target)) { |
| _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1); |
| health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_TIMEOUT); |
| } |
| |
| rep->analysers &= AN_RES_FLT_END; |
| txn->status = 504; |
| s->si[1].flags |= SI_FL_NOLINGER; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_SRVTO; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_H; |
| return 0; |
| } |
| |
| /* 3: client abort with an abortonclose */ |
| else if ((rep->flags & CF_SHUTR) && ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))) { |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1); |
| _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1); |
| if (objt_server(s->target)) |
| _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.cli_aborts, 1); |
| |
| rep->analysers &= AN_RES_FLT_END; |
| txn->status = 400; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_CLICL; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_H; |
| |
| /* process_stream() will take care of the error */ |
| return 0; |
| } |
| |
| /* 4: close from server, capture the response if the server has started to respond */ |
| else if (rep->flags & CF_SHUTR) { |
| if ((si_b->flags & SI_FL_L7_RETRY) && |
| (s->be->retry_type & PR_RE_DISCONNECTED)) { |
| if (co_data(rep) || do_l7_retry(s, si_b) == 0) |
| return 0; |
| } |
| |
| if (txn->flags & TX_NOT_FIRST) |
| goto abort_keep_alive; |
| |
| _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1); |
| if (objt_server(s->target)) { |
| _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1); |
| health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_BROKEN_PIPE); |
| } |
| |
| rep->analysers &= AN_RES_FLT_END; |
| txn->status = 502; |
| s->si[1].flags |= SI_FL_NOLINGER; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_SRVCL; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_H; |
| return 0; |
| } |
| |
| /* 5: write error to client (we don't send any message then) */ |
| else if (rep->flags & CF_WRITE_ERROR) { |
| if (txn->flags & TX_NOT_FIRST) |
| goto abort_keep_alive; |
| |
| _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1); |
| rep->analysers &= AN_RES_FLT_END; |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_CLICL; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_H; |
| |
| /* process_stream() will take care of the error */ |
| return 0; |
| } |
| |
| channel_dont_close(rep); |
| rep->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */ |
| 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. |
| */ |
| msg->msg_state = HTTP_MSG_BODY; |
| BUG_ON(htx_get_first_type(htx) != HTX_BLK_RES_SL); |
| sl = http_get_stline(htx); |
| |
| /* 0: we might have to print this header in debug mode */ |
| if (unlikely((global.mode & MODE_DEBUG) && |
| (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) { |
| int32_t pos; |
| |
| http_debug_stline("srvrep", s, sl); |
| |
| for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) { |
| struct htx_blk *blk = htx_get_blk(htx, pos); |
| enum htx_blk_type type = htx_get_blk_type(blk); |
| |
| if (type == HTX_BLK_EOH) |
| break; |
| if (type != HTX_BLK_HDR) |
| continue; |
| |
| http_debug_hdr("srvhdr", s, |
| htx_get_blk_name(htx, blk), |
| htx_get_blk_value(htx, blk)); |
| } |
| } |
| |
| /* 1: get the status code and the version. Also set HTTP flags */ |
| txn->status = sl->info.res.status; |
| if (sl->flags & HTX_SL_F_VER_11) |
| msg->flags |= HTTP_MSGF_VER_11; |
| if (sl->flags & HTX_SL_F_XFER_LEN) { |
| msg->flags |= HTTP_MSGF_XFER_LEN; |
| msg->flags |= ((sl->flags & HTX_SL_F_CLEN) ? HTTP_MSGF_CNT_LEN : HTTP_MSGF_TE_CHNK); |
| if (sl->flags & HTX_SL_F_BODYLESS) |
| msg->flags |= HTTP_MSGF_BODYLESS; |
| } |
| |
| n = txn->status / 100; |
| 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) |
| stream_inc_http_err_ctr(s); |
| |
| if (objt_server(s->target)) |
| _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.p.http.rsp[n], 1); |
| |
| /* 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 (objt_server(s->target)) { |
| if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505)) |
| health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_OK); |
| else |
| health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_STS); |
| } |
| |
| /* |
| * We may be facing a 100-continue response, or any other informational |
| * 1xx response which is non-final, 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. There's an exception for |
| * 101 which is used later in the code to switch protocols. |
| */ |
| if (txn->status < 200 && |
| (txn->status == 100 || txn->status >= 102)) { |
| FLT_STRM_CB(s, flt_http_reset(s, msg)); |
| htx->first = channel_htx_fwd_headers(rep, htx); |
| msg->msg_state = HTTP_MSG_RPBEFORE; |
| msg->flags = 0; |
| txn->status = 0; |
| s->logs.t_data = -1; /* was not a response yet */ |
| goto next_one; |
| } |
| |
| /* |
| * 2: check for cacheability. |
| */ |
| |
| switch (txn->status) { |
| case 200: |
| case 203: |
| case 204: |
| case 206: |
| case 300: |
| case 301: |
| case 404: |
| case 405: |
| case 410: |
| case 414: |
| case 501: |
| break; |
| default: |
| /* RFC7231#6.1: |
| * Responses with status codes that are defined as |
| * cacheable by default (e.g., 200, 203, 204, 206, |
| * 300, 301, 404, 405, 410, 414, and 501 in this |
| * specification) can be reused by a cache with |
| * heuristic expiration unless otherwise indicated |
| * by the method definition or explicit cache |
| * controls [RFC7234]; all other status codes are |
| * not cacheable by default. |
| */ |
| txn->flags &= ~(TX_CACHEABLE | TX_CACHE_COOK); |
| break; |
| } |
| |
| /* |
| * 3: we may need to capture headers |
| */ |
| s->logs.logwait &= ~LW_RESP; |
| if (unlikely((s->logs.logwait & LW_RSPHDR) && s->res_cap)) |
| http_capture_headers(htx, s->res_cap, sess->fe->rsp_cap); |
| |
| /* Skip parsing if no content length is possible. */ |
| 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 |= TX_CON_WANT_TUN; |
| } |
| |
| /* check for NTML authentication headers in 401 (WWW-Authenticate) and |
| * 407 (Proxy-Authenticate) responses and set the connection to private |
| */ |
| srv_conn = cs_conn(objt_cs(s->si[1].end)); |
| if (srv_conn) { |
| struct ist hdr; |
| struct http_hdr_ctx ctx; |
| |
| if (txn->status == 401) |
| hdr = ist("WWW-Authenticate"); |
| else if (txn->status == 407) |
| hdr = ist("Proxy-Authenticate"); |
| else |
| goto end; |
| |
| ctx.blk = NULL; |
| while (http_find_header(htx, hdr, &ctx, 0)) { |
| if ((ctx.value.len >= 9 && word_match(ctx.value.ptr, ctx.value.len, "Negotiate", 9)) || |
| (ctx.value.len >= 4 && word_match(ctx.value.ptr, ctx.value.len, "NTLM", 4))) { |
| sess->flags |= SESS_FL_PREFER_LAST; |
| srv_conn->flags |= CO_FL_PRIVATE; |
| } |
| } |
| } |
| |
| end: |
| /* we want to have the response time before we start processing it */ |
| s->logs.t_data = tv_ms_elapsed(&s->logs.tv_accept, &now); |
| |
| /* end of job, return OK */ |
| rep->analysers &= ~an_bit; |
| rep->analyse_exp = TICK_ETERNITY; |
| channel_auto_close(rep); |
| return 1; |
| |
| return_bad_res: |
| _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1); |
| if (objt_server(s->target)) { |
| _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1); |
| health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_HDRRSP); |
| } |
| if ((s->be->retry_type & PR_RE_JUNK_REQUEST) && |
| (si_b->flags & SI_FL_L7_RETRY) && |
| do_l7_retry(s, si_b) == 0) |
| return 0; |
| txn->status = 502; |
| s->si[1].flags |= SI_FL_NOLINGER; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| rep->analysers &= AN_RES_FLT_END; |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_PRXCOND; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_H; |
| return 0; |
| |
| abort_keep_alive: |
| /* A keep-alive request to the server failed on a network error. |
| * The client is required to retry. We need to close without returning |
| * any other information so that the client retries. |
| */ |
| txn->status = 0; |
| rep->analysers &= AN_RES_FLT_END; |
| s->req.analysers &= AN_REQ_FLT_END; |
| s->logs.logwait = 0; |
| s->logs.level = 0; |
| s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */ |
| http_reply_and_close(s, txn->status, NULL); |
| return 0; |
| } |
| |
| /* 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 s->res.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 stream *s, struct channel *rep, int an_bit, struct proxy *px) |
| { |
| struct session *sess = s->sess; |
| struct http_txn *txn = s->txn; |
| struct http_msg *msg = &txn->rsp; |
| struct htx *htx; |
| struct proxy *cur_proxy; |
| enum rule_result ret = HTTP_RULE_RES_CONT; |
| |
| if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */ |
| return 0; |
| |
| DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| rep, |
| rep->rex, rep->wex, |
| rep->flags, |
| ci_data(rep), |
| rep->analysers); |
| |
| htx = htxbuf(&rep->buf); |
| |
| /* The stats applet needs to adjust the Connection header but we don't |
| * apply any filter there. |
| */ |
| if (unlikely(objt_applet(s->target) == &http_stats_applet)) { |
| rep->analysers &= ~an_bit; |
| rep->analyse_exp = TICK_ETERNITY; |
| goto end; |
| } |
| |
| /* |
| * 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. |
| * |
| * Maybe we are in resume condiion. In this case I choose the |
| * "struct proxy" which contains the rule list matching the resume |
| * pointer. If none of theses "struct proxy" match, I initialise |
| * the process with the first one. |
| * |
| * In fact, I check only correspondance betwwen the current list |
| * pointer and the ->fe rule list. If it doesn't match, I initialize |
| * the loop with the ->be. |
| */ |
| if (s->current_rule_list == &sess->fe->http_res_rules) |
| cur_proxy = sess->fe; |
| else |
| cur_proxy = s->be; |
| while (1) { |
| /* evaluate http-response rules */ |
| if (ret == HTTP_RULE_RES_CONT) { |
| ret = http_res_get_intercept_rule(cur_proxy, &cur_proxy->http_res_rules, s); |
| |
| if (ret == HTTP_RULE_RES_BADREQ) |
| goto return_srv_prx_502; |
| |
| if (ret == HTTP_RULE_RES_DONE) { |
| rep->analysers &= ~an_bit; |
| rep->analyse_exp = TICK_ETERNITY; |
| return 1; |
| } |
| } |
| |
| /* we need to be called again. */ |
| if (ret == HTTP_RULE_RES_YIELD) { |
| channel_dont_close(rep); |
| return 0; |
| } |
| |
| /* has the response been denied ? */ |
| if (txn->flags & TX_SVDENY) { |
| if (objt_server(s->target)) |
| _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_secu, 1); |
| |
| _HA_ATOMIC_ADD(&s->be->be_counters.denied_resp, 1); |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_resp, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->denied_resp, 1); |
| goto return_srv_prx_502; |
| } |
| |
| /* check whether we're already working on the frontend */ |
| if (cur_proxy == sess->fe) |
| break; |
| cur_proxy = sess->fe; |
| } |
| |
| /* After this point, this anayzer can't return yield, so we can |
| * remove the bit corresponding to this analyzer from the list. |
| * |
| * Note that the intermediate returns and goto found previously |
| * reset the analyzers. |
| */ |
| rep->analysers &= ~an_bit; |
| rep->analyse_exp = TICK_ETERNITY; |
| |
| /* OK that's all we can do for 1xx responses */ |
| if (unlikely(txn->status < 200 && txn->status != 101)) |
| goto end; |
| |
| /* |
| * Now check for a server cookie. |
| */ |
| if (s->be->cookie_name || sess->fe->capture_name || (s->be->options & PR_O_CHK_CACHE)) |
| http_manage_server_side_cookies(s, rep); |
| |
| /* |
| * Check for cache-control or pragma headers if required. |
| */ |
| if ((s->be->options & PR_O_CHK_CACHE) || (s->be->ck_opts & PR_CK_NOC)) |
| http_check_response_for_cacheability(s, rep); |
| |
| /* |
| * Add server cookie in the response if needed |
| */ |
| if (objt_server(s->target) && (s->be->ck_opts & PR_CK_INS) && |
| !((txn->flags & TX_SCK_FOUND) && (s->be->ck_opts & PR_CK_PSV)) && |
| (!(s->flags & SF_DIRECT) || |
| ((s->be->cookie_maxidle || txn->cookie_last_date) && |
| (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) || |
| (s->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date |
| (!s->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date |
| (!(s->be->ck_opts & PR_CK_POST) || (txn->meth == HTTP_METH_POST)) && |
| !(s->flags & SF_IGNORE_PRST)) { |
| /* 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 (!objt_server(s->target)->cookie) { |
| chunk_printf(&trash, |
| "%s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/", |
| s->be->cookie_name); |
| } |
| else { |
| chunk_printf(&trash, "%s=%s", s->be->cookie_name, objt_server(s->target)->cookie); |
| |
| if (s->be->cookie_maxidle || s->be->cookie_maxlife) { |
| /* emit last_date, which is mandatory */ |
| trash.area[trash.data++] = COOKIE_DELIM_DATE; |
| s30tob64((date.tv_sec+3) >> 2, |
| trash.area + trash.data); |
| trash.data += 5; |
| |
| if (s->be->cookie_maxlife) { |
| /* emit first_date, which is either the original one or |
| * the current date. |
| */ |
| trash.area[trash.data++] = COOKIE_DELIM_DATE; |
| s30tob64(txn->cookie_first_date ? |
| txn->cookie_first_date >> 2 : |
| (date.tv_sec+3) >> 2, |
| trash.area + trash.data); |
| trash.data += 5; |
| } |
| } |
| chunk_appendf(&trash, "; path=/"); |
| } |
| |
| if (s->be->cookie_domain) |
| chunk_appendf(&trash, "; domain=%s", s->be->cookie_domain); |
| |
| if (s->be->ck_opts & PR_CK_HTTPONLY) |
| chunk_appendf(&trash, "; HttpOnly"); |
| |
| if (s->be->ck_opts & PR_CK_SECURE) |
| chunk_appendf(&trash, "; Secure"); |
| |
| if (unlikely(!http_add_header(htx, ist("Set-Cookie"), ist2(trash.area, trash.data)))) |
| goto return_bad_resp; |
| |
| txn->flags &= ~TX_SCK_MASK; |
| if (__objt_server(s->target)->cookie && (s->flags & SF_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 ((s->be->ck_opts & PR_CK_NOC) && (txn->flags & TX_CACHEABLE)) { |
| |
| txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK; |
| |
| if (unlikely(!http_add_header(htx, ist("Cache-control"), ist("private")))) |
| goto return_bad_resp; |
| } |
| } |
| |
| /* |
| * 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)) && |
| (s->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 (objt_server(s->target)) |
| _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_secu, 1); |
| |
| _HA_ATOMIC_ADD(&s->be->be_counters.denied_resp, 1); |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_resp, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->denied_resp, 1); |
| |
| ha_alert("Blocking cacheable cookie in response from instance %s, server %s.\n", |
| s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>"); |
| send_log(s->be, LOG_ALERT, |
| "Blocking cacheable cookie in response from instance %s, server %s.\n", |
| s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>"); |
| goto return_srv_prx_502; |
| } |
| |
| end: |
| /* Always enter in the body analyzer */ |
| rep->analysers &= ~AN_RES_FLT_XFER_DATA; |
| rep->analysers |= AN_RES_HTTP_XFER_BODY; |
| |
| /* 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 (!LIST_ISEMPTY(&sess->fe->logformat) && !(s->logs.logwait & LW_BYTES)) { |
| s->logs.t_close = s->logs.t_data; /* to get a valid end date */ |
| s->logs.bytes_out = htx->data; |
| s->do_log(s); |
| s->logs.bytes_out = 0; |
| } |
| return 1; |
| |
| return_bad_resp: |
| if (objt_server(s->target)) { |
| _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1); |
| health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP); |
| } |
| _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1); |
| |
| return_srv_prx_502: |
| rep->analysers &= AN_RES_FLT_END; |
| txn->status = 502; |
| s->logs.t_data = -1; /* was not a valid response */ |
| s->si[1].flags |= SI_FL_NOLINGER; |
| http_reply_and_close(s, txn->status, http_error_message(s)); |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_PRXCOND; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_H; |
| return 0; |
| } |
| |
| /* 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 stream. |
| * |
| * It is capable of compressing response data both in content-length mode and |
| * in chunked mode. The state machines follows different flows depending on |
| * whether content-length and chunked modes are used, since there are no |
| * trailers in content-length : |
| * |
| * chk-mode cl-mode |
| * ,----- BODY -----. |
| * / \ |
| * V size > 0 V chk-mode |
| * .--> SIZE -------------> DATA -------------> CRLF |
| * | | size == 0 | last byte | |
| * | v final crlf v inspected | |
| * | TRAILERS -----------> DONE | |
| * | | |
| * `----------------------------------------------' |
| * |
| * Compression only happens in the DATA state, and must be flushed in final |
| * states (TRAILERS/DONE) or when leaving on missing data. Normal forwarding |
| * is performed at once on final states for all bytes parsed, or when leaving |
| * on missing data. |
| */ |
| int http_response_forward_body(struct stream *s, struct channel *res, int an_bit) |
| { |
| struct session *sess = s->sess; |
| struct http_txn *txn = s->txn; |
| struct http_msg *msg = &s->txn->rsp; |
| struct htx *htx; |
| int ret; |
| |
| DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n", |
| now_ms, __FUNCTION__, |
| s, |
| res, |
| res->rex, res->wex, |
| res->flags, |
| ci_data(res), |
| res->analysers); |
| |
| htx = htxbuf(&res->buf); |
| |
| if ((res->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) || |
| ((res->flags & CF_SHUTW) && (res->to_forward || co_data(res)))) { |
| /* Output closed while we were sending data. We must abort and |
| * wake the other side up. |
| */ |
| msg->err_state = msg->msg_state; |
| msg->msg_state = HTTP_MSG_ERROR; |
| http_end_response(s); |
| http_end_request(s); |
| return 1; |
| } |
| |
| if (msg->msg_state == HTTP_MSG_BODY) |
| msg->msg_state = HTTP_MSG_DATA; |
| |
| /* in most states, we should abort in case of early close */ |
| channel_auto_close(res); |
| |
| if (res->to_forward) { |
| if (res->to_forward == CHN_INFINITE_FORWARD) { |
| if (res->flags & (CF_SHUTR|CF_EOI)) { |
| msg->msg_state = HTTP_MSG_DONE; |
| res->to_forward = 0; |
| goto done; |
| } |
| } |
| else { |
| /* We can't process the buffer's contents yet */ |
| res->flags |= CF_WAKE_WRITE; |
| goto missing_data_or_waiting; |
| } |
| } |
| |
| if (msg->msg_state >= HTTP_MSG_DONE) |
| goto done; |
| |
| /* Forward input data. We get it by removing all outgoing data not |
| * forwarded yet from HTX data size. If there are some data filters, we |
| * let them decide the amount of data to forward. |
| */ |
| if (HAS_RSP_DATA_FILTERS(s)) { |
| ret = flt_http_payload(s, msg, htx->data); |
| if (ret < 0) |
| goto return_bad_res; |
| c_adv(res, ret); |
| } |
| else { |
| c_adv(res, htx->data - co_data(res)); |
| if (msg->flags & HTTP_MSGF_XFER_LEN) |
| channel_htx_forward_forever(res, htx); |
| } |
| |
| if ((txn->meth == HTTP_METH_CONNECT && txn->status == 200) || txn->status == 101 || |
| (!(msg->flags & HTTP_MSGF_XFER_LEN) && (res->flags & CF_SHUTR || !HAS_RSP_DATA_FILTERS(s)))) { |
| msg->msg_state = HTTP_MSG_TUNNEL; |
| goto done; |
| } |
| |
| /* Check if the end-of-message is reached and if so, switch the message |
| * in HTTP_MSG_ENDING state. Then if all data was marked to be |
| * forwarded, set the state to HTTP_MSG_DONE. |
| */ |
| if (htx_get_tail_type(htx) != HTX_BLK_EOM) |
| goto missing_data_or_waiting; |
| |
| msg->msg_state = HTTP_MSG_ENDING; |
| if (htx->data != co_data(res)) |
| goto missing_data_or_waiting; |
| msg->msg_state = HTTP_MSG_DONE; |
| res->to_forward = 0; |
| |
| done: |
| /* other states, DONE...TUNNEL */ |
| channel_dont_close(res); |
| |
| if (HAS_RSP_DATA_FILTERS(s)) { |
| ret = flt_http_end(s, msg); |
| if (ret <= 0) { |
| if (!ret) |
| goto missing_data_or_waiting; |
| goto return_bad_res; |
| } |
| } |
| |
| http_end_response(s); |
| if (!(res->analysers & an_bit)) { |
| http_end_request(s); |
| if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) { |
| if (res->flags & CF_SHUTW) { |
| /* response errors are most likely due to the |
| * client aborting the transfer. */ |
| goto return_cli_abort; |
| } |
| goto return_bad_res; |
| } |
| return 1; |
| } |
| return 0; |
| |
| missing_data_or_waiting: |
| if (res->flags & CF_SHUTW) |
| goto return_cli_abort; |
| |
| if (htx->flags & HTX_FL_PARSING_ERROR) |
| goto return_bad_res; |
| |
| /* stop waiting for data if the input is closed before the end. If the |
| * client side was already closed, it means that the client has aborted, |
| * so we don't want to count this as a server abort. Otherwise it's a |
| * server abort. |
| */ |
| if (msg->msg_state < HTTP_MSG_ENDING && res->flags & CF_SHUTR) { |
| if ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW)) |
| goto return_cli_abort; |
| /* If we have some pending data, we continue the processing */ |
| if (htx_is_empty(htx)) |
| goto return_srv_abort; |
| } |
| |
| /* 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 CF_DONTCLOSE. Similarly when there is a content-leng or if there |
| * are filters registered on the stream, we don't want to forward a |
| * close |
| */ |
| if ((msg->flags & HTTP_MSGF_XFER_LEN) || HAS_RSP_DATA_FILTERS(s)) |
| channel_dont_close(res); |
| |
| /* We know that more data are expected, but we couldn't send more that |
| * what we did. So we always set the CF_EXPECT_MORE flag so that the |
| * system knows it must not set a PUSH on this first part. Interactive |
| * modes are already handled by the stream sock layer. We must not do |
| * this in content-length mode because it could present the MSG_MORE |
| * flag with the last block of forwarded data, which would cause an |
| * additional delay to be observed by the receiver. |
| */ |
| if ((msg->flags & HTTP_MSGF_TE_CHNK) || (msg->flags & HTTP_MSGF_COMPRESSING)) |
| res->flags |= CF_EXPECT_MORE; |
| |
| /* the stream handler will take care of timeouts and errors */ |
| return 0; |
| |
| return_srv_abort: |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1); |
| _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1); |
| if (objt_server(s->target)) |
| _HA_ATOMIC_ADD(&objt_server(s->target)->counters.srv_aborts, 1); |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_SRVCL; |
| goto return_error; |
| |
| return_cli_abort: |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1); |
| _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1); |
| if (objt_server(s->target)) |
| _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1); |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_CLICL; |
| goto return_error; |
| |
| return_bad_res: |
| _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1); |
| if (objt_server(s->target)) { |
| _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_resp, 1); |
| health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP); |
| } |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_SRVCL; |
| |
| return_error: |
| txn->rsp.err_state = txn->rsp.msg_state; |
| txn->rsp.msg_state = HTTP_MSG_ERROR; |
| /* don't send any error message as we're in the body */ |
| http_reply_and_close(s, txn->status, NULL); |
| res->analysers &= AN_RES_FLT_END; |
| s->req.analysers &= AN_REQ_FLT_END; /* we're in data phase, we want to abort both directions */ |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_D; |
| return 0; |
| } |
| |
| /* Perform an HTTP redirect based on the information in <rule>. The function |
| * returns zero on success, or zero in case of a, irrecoverable error such |
| * as too large a request to build a valid response. |
| */ |
| int http_apply_redirect_rule(struct redirect_rule *rule, struct stream *s, struct http_txn *txn) |
| { |
| struct channel *req = &s->req; |
| struct channel *res = &s->res; |
| struct htx *htx; |
| struct htx_sl *sl; |
| struct buffer *chunk; |
| struct ist status, reason, location; |
| unsigned int flags; |
| size_t data; |
| int close = 0; /* Try to keep the connection alive byt default */ |
| |
| chunk = alloc_trash_chunk(); |
| if (!chunk) |
| goto fail; |
| |
| /* |
| * Create the location |
| */ |
| htx = htxbuf(&req->buf); |
| switch(rule->type) { |
| case REDIRECT_TYPE_SCHEME: { |
| struct http_hdr_ctx ctx; |
| struct ist path, host; |
| |
| host = ist(""); |
| ctx.blk = NULL; |
| if (http_find_header(htx, ist("Host"), &ctx, 0)) |
| host = ctx.value; |
| |
| sl = http_get_stline(htx); |
| path = http_get_path(htx_sl_req_uri(sl)); |
| /* build message using path */ |
| if (path.ptr) { |
| if (rule->flags & REDIRECT_FLAG_DROP_QS) { |
| int qs = 0; |
| while (qs < path.len) { |
| if (*(path.ptr + qs) == '?') { |
| path.len = qs; |
| break; |
| } |
| qs++; |
| } |
| } |
| } |
| else |
| path = ist("/"); |
| |
| if (rule->rdr_str) { /* this is an old "redirect" rule */ |
| /* add scheme */ |
| if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len)) |
| goto fail; |
| } |
| else { |
| /* add scheme with executing log format */ |
| chunk->data += build_logline(s, chunk->area + chunk->data, |
| chunk->size - chunk->data, |
| &rule->rdr_fmt); |
| } |
| /* add "://" + host + path */ |
| if (!chunk_memcat(chunk, "://", 3) || |
| !chunk_memcat(chunk, host.ptr, host.len) || |
| !chunk_memcat(chunk, path.ptr, path.len)) |
| goto fail; |
| |
| /* append a slash at the end of the location if needed and missing */ |
| if (chunk->data && chunk->area[chunk->data - 1] != '/' && |
| (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) { |
| if (chunk->data + 1 >= chunk->size) |
| goto fail; |
| chunk->area[chunk->data++] = '/'; |
| } |
| break; |
| } |
| |
| case REDIRECT_TYPE_PREFIX: { |
| struct ist path; |
| |
| sl = http_get_stline(htx); |
| path = http_get_path(htx_sl_req_uri(sl)); |
| /* build message using path */ |
| if (path.ptr) { |
| if (rule->flags & REDIRECT_FLAG_DROP_QS) { |
| int qs = 0; |
| while (qs < path.len) { |
| if (*(path.ptr + qs) == '?') { |
| path.len = qs; |
| break; |
| } |
| qs++; |
| } |
| } |
| } |
| else |
| path = ist("/"); |
| |
| if (rule->rdr_str) { /* this is an old "redirect" rule */ |
| /* 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 != '/') { |
| if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len)) |
| goto fail; |
| } |
| } |
| else { |
| /* add prefix with executing log format */ |
| chunk->data += build_logline(s, chunk->area + chunk->data, |
| chunk->size - chunk->data, |
| &rule->rdr_fmt); |
| } |
| |
| /* add path */ |
| if (!chunk_memcat(chunk, path.ptr, path.len)) |
| goto fail; |
| |
| /* append a slash at the end of the location if needed and missing */ |
| if (chunk->data && chunk->area[chunk->data - 1] != '/' && |
| (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) { |
| if (chunk->data + 1 >= chunk->size) |
| goto fail; |
| chunk->area[chunk->data++] = '/'; |
| } |
| break; |
| } |
| case REDIRECT_TYPE_LOCATION: |
| default: |
| if (rule->rdr_str) { /* this is an old "redirect" rule */ |
| /* add location */ |
| if (!chunk_memcat(chunk, rule->rdr_str, rule->rdr_len)) |
| goto fail; |
| } |
| else { |
| /* add location with executing log format */ |
| chunk->data += build_logline(s, chunk->area + chunk->data, |
| chunk->size - chunk->data, |
| &rule->rdr_fmt); |
| } |
| break; |
| } |
| location = ist2(chunk->area, chunk->data); |
| |
| /* |
| * Create the 30x response |
| */ |
| switch (rule->code) { |
| case 308: |
| status = ist("308"); |
| reason = ist("Permanent Redirect"); |
| break; |
| case 307: |
| status = ist("307"); |
| reason = ist("Temporary Redirect"); |
| break; |
| case 303: |
| status = ist("303"); |
| reason = ist("See Other"); |
| break; |
| case 301: |
| status = ist("301"); |
| reason = ist("Moved Permanently"); |
| break; |
| case 302: |
| default: |
| status = ist("302"); |
| reason = ist("Found"); |
| break; |
| } |
| |
| if (!(txn->req.flags & HTTP_MSGF_BODYLESS) && txn->req.msg_state != HTTP_MSG_DONE) |
| close = 1; |
| |
| htx = htx_from_buf(&res->buf); |
| flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS); |
| sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"), status, reason); |
| if (!sl) |
| goto fail; |
| sl->info.res.status = rule->code; |
| s->txn->status = rule->code; |
| |
| if (close && !htx_add_header(htx, ist("Connection"), ist("close"))) |
| goto fail; |
| |
| if (!htx_add_header(htx, ist("Content-length"), ist("0")) || |
| !htx_add_header(htx, ist("Location"), location)) |
| goto fail; |
| |
| if (rule->code == 302 || rule->code == 303 || rule->code == 307) { |
| if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache"))) |
| goto fail; |
| } |
| |
| if (rule->cookie_len) { |
| if (!htx_add_header(htx, ist("Set-Cookie"), ist2(rule->cookie_str, rule->cookie_len))) |
| goto fail; |
| } |
| |
| if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM)) |
| goto fail; |
| |
| /* let's log the request time */ |
| s->logs.tv_request = now; |
| |
| data = htx->data - co_data(res); |
| c_adv(res, data); |
| res->total += data; |
| |
| channel_auto_read(req); |
| channel_abort(req); |
| channel_auto_close(req); |
| channel_htx_erase(req, htxbuf(&req->buf)); |
| |
| res->wex = tick_add_ifset(now_ms, res->wto); |
| channel_auto_read(res); |
| channel_auto_close(res); |
| channel_shutr_now(res); |
| |
| req->analysers &= AN_REQ_FLT_END; |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_LOCAL; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_R; |
| |
| free_trash_chunk(chunk); |
| return 1; |
| |
| fail: |
| /* If an error occurred, remove the incomplete HTTP response from the |
| * buffer */ |
| channel_htx_truncate(res, htxbuf(&res->buf)); |
| free_trash_chunk(chunk); |
| return 0; |
| } |
| |
| int http_transform_header_str(struct stream* s, struct channel *chn, struct htx *htx, |
| struct ist name, const char *str, struct my_regex *re, int action) |
| { |
| struct http_hdr_ctx ctx; |
| struct buffer *output = get_trash_chunk(); |
| |
| /* find full header is action is ACT_HTTP_REPLACE_HDR */ |
| ctx.blk = NULL; |
| while (http_find_header(htx, name, &ctx, (action == ACT_HTTP_REPLACE_HDR))) { |
| if (!regex_exec_match2(re, ctx.value.ptr, ctx.value.len, MAX_MATCH, pmatch, 0)) |
| continue; |
| |
| output->data = exp_replace(output->area, output->size, ctx.value.ptr, str, pmatch); |
| if (output->data == -1) |
| return -1; |
| if (!http_replace_header_value(htx, &ctx, ist2(output->area, output->data))) |
| return -1; |
| } |
| return 0; |
| } |
| |
| static int http_transform_header(struct stream* s, struct channel *chn, struct htx *htx, |
| const struct ist name, struct list *fmt, struct my_regex *re, int action) |
| { |
| struct buffer *replace; |
| int ret = -1; |
| |
| replace = alloc_trash_chunk(); |
| if (!replace) |
| goto leave; |
| |
| replace->data = build_logline(s, replace->area, replace->size, fmt); |
| if (replace->data >= replace->size - 1) |
| goto leave; |
| |
| ret = http_transform_header_str(s, chn, htx, name, replace->area, re, action); |
| |
| leave: |
| free_trash_chunk(replace); |
| return ret; |
| } |
| |
| |
| /* Terminate a 103-Erly-hints response and send it to the client. It returns 0 |
| * on success and -1 on error. The response channel is updated accordingly. |
| */ |
| static int http_reply_103_early_hints(struct channel *res) |
| { |
| struct htx *htx = htx_from_buf(&res->buf); |
| size_t data; |
| |
| if (!htx_add_endof(htx, HTX_BLK_EOH)) { |
| /* If an error occurred during an Early-hint rule, |
| * remove the incomplete HTTP 103 response from the |
| * buffer */ |
| channel_htx_truncate(res, htx); |
| return -1; |
| } |
| |
| data = htx->data - co_data(res); |
| c_adv(res, data); |
| res->total += data; |
| return 0; |
| } |
| |
| /* |
| * Build an HTTP Early Hint HTTP 103 response header with <name> as name and with a value |
| * built according to <fmt> log line format. |
| * If <early_hints> is 0, it is starts a new response by adding the start |
| * line. If an error occurred -1 is returned. On success 0 is returned. The |
| * channel is not updated here. It must be done calling the function |
| * http_reply_103_early_hints(). |
| */ |
| static int http_add_early_hint_header(struct stream *s, int early_hints, const struct ist name, struct list *fmt) |
| { |
| struct channel *res = &s->res; |
| struct htx *htx = htx_from_buf(&res->buf); |
| struct buffer *value = alloc_trash_chunk(); |
| |
| if (!early_hints) { |
| struct htx_sl *sl; |
| unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11| |
| HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS); |
| |
| sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, |
| ist("HTTP/1.1"), ist("103"), ist("Early Hints")); |
| if (!sl) |
| goto fail; |
| sl->info.res.status = 103; |
| } |
| |
| value->data = build_logline(s, b_tail(value), b_room(value), fmt); |
| if (!htx_add_header(htx, name, ist2(b_head(value), b_data(value)))) |
| goto fail; |
| |
| free_trash_chunk(value); |
| return 1; |
| |
| fail: |
| /* If an error occurred during an Early-hint rule, remove the incomplete |
| * HTTP 103 response from the buffer */ |
| channel_htx_truncate(res, htx); |
| free_trash_chunk(value); |
| return -1; |
| } |
| |
| /* This function executes one of the set-{method,path,query,uri} actions. It |
| * takes the string from the variable 'replace' with length 'len', then modifies |
| * the relevant part of the request line accordingly. Then it updates various |
| * pointers to the next elements which were moved, and the total buffer length. |
| * It finds the action to be performed in p[2], previously filled by function |
| * parse_set_req_line(). It returns 0 in case of success, -1 in case of internal |
| * error, though this can be revisited when this code is finally exploited. |
| * |
| * 'action' can be '0' to replace method, '1' to replace path, '2' to replace |
| * query string and 3 to replace uri. |
| * |
| * In query string case, the mark question '?' must be set at the start of the |
| * string by the caller, event if the replacement query string is empty. |
| */ |
| int http_req_replace_stline(int action, const char *replace, int len, |
| struct proxy *px, struct stream *s) |
| { |
| struct htx *htx = htxbuf(&s->req.buf); |
| |
| switch (action) { |
| case 0: // method |
| if (!http_replace_req_meth(htx, ist2(replace, len))) |
| return -1; |
| break; |
| |
| case 1: // path |
| if (!http_replace_req_path(htx, ist2(replace, len))) |
| return -1; |
| break; |
| |
| case 2: // query |
| if (!http_replace_req_query(htx, ist2(replace, len))) |
| return -1; |
| break; |
| |
| case 3: // uri |
| if (!http_replace_req_uri(htx, ist2(replace, len))) |
| return -1; |
| break; |
| |
| default: |
| return -1; |
| } |
| return 0; |
| } |
| |
| /* This function replace the HTTP status code and the associated message. The |
| * variable <status> contains the new status code. This function never fails. |
| */ |
| void http_res_set_status(unsigned int status, const char *reason, struct stream *s) |
| { |
| struct htx *htx = htxbuf(&s->res.buf); |
| char *res; |
| |
| chunk_reset(&trash); |
| res = ultoa_o(status, trash.area, trash.size); |
| trash.data = res - trash.area; |
| |
| /* Do we have a custom reason format string? */ |
| if (reason == NULL) |
| reason = http_get_reason(status); |
| |
| if (http_replace_res_status(htx, ist2(trash.area, trash.data))) |
| http_replace_res_reason(htx, ist2(reason, strlen(reason))); |
| } |
| |
| /* Executes the http-request rules <rules> for stream <s>, proxy <px> and |
| * transaction <txn>. Returns the verdict of the first rule that prevents |
| * further processing of the request (auth, deny, ...), and defaults to |
| * HTTP_RULE_RES_STOP if it executed all rules or stopped on an allow, or |
| * HTTP_RULE_RES_CONT if the last rule was reached. It may set the TX_CLTARPIT |
| * on txn->flags if it encounters a tarpit rule. If <deny_status> is not NULL |
| * and a deny/tarpit rule is matched, it will be filled with this rule's deny |
| * status. |
| */ |
| static enum rule_result http_req_get_intercept_rule(struct proxy *px, struct list *rules, |
| struct stream *s, int *deny_status) |
| { |
| struct session *sess = strm_sess(s); |
| struct http_txn *txn = s->txn; |
| struct htx *htx; |
| struct act_rule *rule; |
| struct http_hdr_ctx ctx; |
| const char *auth_realm; |
| enum rule_result rule_ret = HTTP_RULE_RES_CONT; |
| int act_flags = 0; |
| int early_hints = 0; |
| |
| htx = htxbuf(&s->req.buf); |
| |
| /* If "the current_rule_list" match the executed rule list, we are in |
| * resume condition. If a resume is needed it is always in the action |
| * and never in the ACL or converters. In this case, we initialise the |
| * current rule, and go to the action execution point. |
| */ |
| if (s->current_rule) { |
| rule = s->current_rule; |
| s->current_rule = NULL; |
| if (s->current_rule_list == rules) |
| goto resume_execution; |
| } |
| s->current_rule_list = rules; |
| |
| list_for_each_entry(rule, rules, list) { |
| /* check optional condition */ |
| if (rule->cond) { |
| int ret; |
| |
| ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL); |
| ret = acl_pass(ret); |
| |
| if (rule->cond->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| |
| if (!ret) /* condition not matched */ |
| continue; |
| } |
| |
| act_flags |= ACT_FLAG_FIRST; |
| resume_execution: |
| if (early_hints && rule->action != ACT_HTTP_EARLY_HINT) { |
| early_hints = 0; |
| if (http_reply_103_early_hints(&s->res) == -1) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| } |
| |
| switch (rule->action) { |
| case ACT_ACTION_ALLOW: |
| rule_ret = HTTP_RULE_RES_STOP; |
| goto end; |
| |
| case ACT_ACTION_DENY: |
| if (deny_status) |
| *deny_status = rule->deny_status; |
| rule_ret = HTTP_RULE_RES_DENY; |
| goto end; |
| |
| case ACT_HTTP_REQ_TARPIT: |
| txn->flags |= TX_CLTARPIT; |
| if (deny_status) |
| *deny_status = rule->deny_status; |
| rule_ret = HTTP_RULE_RES_DENY; |
| goto end; |
| |
| case ACT_HTTP_REQ_AUTH: |
| /* Auth might be performed on regular http-req rules as well as on stats */ |
| auth_realm = rule->arg.auth.realm; |
| if (!auth_realm) { |
| if (px->uri_auth && rules == &px->uri_auth->http_req_rules) |
| auth_realm = STATS_DEFAULT_REALM; |
| else |
| auth_realm = px->id; |
| } |
| /* send 401/407 depending on whether we use a proxy or not. We still |
| * count one error, because normal browsing won't significantly |
| * increase the counter but brute force attempts will. |
| */ |
| rule_ret = HTTP_RULE_RES_ABRT; |
| if (http_reply_40x_unauthorized(s, auth_realm) == -1) |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| stream_inc_http_err_ctr(s); |
| goto end; |
| |
| case ACT_HTTP_REDIR: |
| rule_ret = HTTP_RULE_RES_DONE; |
| if (!http_apply_redirect_rule(rule->arg.redir, s, txn)) |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| |
| case ACT_HTTP_SET_NICE: |
| s->task->nice = rule->arg.nice; |
| break; |
| |
| case ACT_HTTP_SET_TOS: |
| conn_set_tos(objt_conn(sess->origin), rule->arg.tos); |
| break; |
| |
| case ACT_HTTP_SET_MARK: |
| conn_set_mark(objt_conn(sess->origin), rule->arg.mark); |
| break; |
| |
| case ACT_HTTP_SET_LOGL: |
| s->logs.level = rule->arg.loglevel; |
| break; |
| |
| case ACT_HTTP_REPLACE_HDR: |
| case ACT_HTTP_REPLACE_VAL: |
| if (http_transform_header(s, &s->req, htx, |
| ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), |
| &rule->arg.hdr_add.fmt, |
| rule->arg.hdr_add.re, rule->action)) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| break; |
| |
| case ACT_HTTP_DEL_HDR: |
| /* remove all occurrences of the header */ |
| ctx.blk = NULL; |
| while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1)) |
| http_remove_header(htx, &ctx); |
| break; |
| |
| case ACT_HTTP_SET_HDR: |
| case ACT_HTTP_ADD_HDR: { |
| /* The scope of the trash buffer must be limited to this function. The |
| * build_logline() function can execute a lot of other function which |
| * can use the trash buffer. So for limiting the scope of this global |
| * buffer, we build first the header value using build_logline, and |
| * after we store the header name. |
| */ |
| struct buffer *replace; |
| struct ist n, v; |
| |
| replace = alloc_trash_chunk(); |
| if (!replace) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| |
| replace->data = build_logline(s, replace->area, replace->size, &rule->arg.hdr_add.fmt); |
| n = ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len); |
| v = ist2(replace->area, replace->data); |
| |
| if (rule->action == ACT_HTTP_SET_HDR) { |
| /* remove all occurrences of the header */ |
| ctx.blk = NULL; |
| while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1)) |
| http_remove_header(htx, &ctx); |
| } |
| |
| if (!http_add_header(htx, n, v)) { |
| static unsigned char rate_limit = 0; |
| |
| if ((rate_limit++ & 255) == 0) { |
| send_log(px, LOG_WARNING, "Proxy %s failed to add or set the request header '%.*s' for request #%u. You might need to increase tune.maxrewrite.", px->id, (int)n.len, n.ptr, s->uniq_id); |
| } |
| |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_rewrites, 1); |
| if (sess->fe != s->be) |
| _HA_ATOMIC_ADD(&s->be->be_counters.failed_rewrites, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->failed_rewrites, 1); |
| } |
| free_trash_chunk(replace); |
| break; |
| } |
| |
| case ACT_HTTP_DEL_ACL: |
| case ACT_HTTP_DEL_MAP: { |
| struct pat_ref *ref; |
| struct buffer *key; |
| |
| /* collect reference */ |
| ref = pat_ref_lookup(rule->arg.map.ref); |
| if (!ref) |
| continue; |
| |
| /* allocate key */ |
| key = alloc_trash_chunk(); |
| if (!key) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| |
| /* collect key */ |
| key->data = build_logline(s, key->area, key->size, &rule->arg.map.key); |
| key->area[key->data] = '\0'; |
| |
| /* perform update */ |
| /* returned code: 1=ok, 0=ko */ |
| HA_SPIN_LOCK(PATREF_LOCK, &ref->lock); |
| pat_ref_delete(ref, key->area); |
| HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock); |
| |
| free_trash_chunk(key); |
| break; |
| } |
| |
| case ACT_HTTP_ADD_ACL: { |
| struct pat_ref *ref; |
| struct buffer *key; |
| |
| /* collect reference */ |
| ref = pat_ref_lookup(rule->arg.map.ref); |
| if (!ref) |
| continue; |
| |
| /* allocate key */ |
| key = alloc_trash_chunk(); |
| if (!key) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| |
| /* collect key */ |
| key->data = build_logline(s, key->area, key->size, &rule->arg.map.key); |
| key->area[key->data] = '\0'; |
| |
| /* perform update */ |
| /* add entry only if it does not already exist */ |
| HA_SPIN_LOCK(PATREF_LOCK, &ref->lock); |
| if (pat_ref_find_elt(ref, key->area) == NULL) |
| pat_ref_add(ref, key->area, NULL, NULL); |
| HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock); |
| |
| free_trash_chunk(key); |
| break; |
| } |
| |
| case ACT_HTTP_SET_MAP: { |
| struct pat_ref *ref; |
| struct buffer *key, *value; |
| |
| /* collect reference */ |
| ref = pat_ref_lookup(rule->arg.map.ref); |
| if (!ref) |
| continue; |
| |
| /* allocate key */ |
| key = alloc_trash_chunk(); |
| if (!key) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| |
| /* allocate value */ |
| value = alloc_trash_chunk(); |
| if (!value) { |
| free_trash_chunk(key); |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| |
| /* collect key */ |
| key->data = build_logline(s, key->area, key->size, &rule->arg.map.key); |
| key->area[key->data] = '\0'; |
| |
| /* collect value */ |
| value->data = build_logline(s, value->area, value->size, &rule->arg.map.value); |
| value->area[value->data] = '\0'; |
| |
| /* perform update */ |
| HA_SPIN_LOCK(PATREF_LOCK, &ref->lock); |
| if (pat_ref_find_elt(ref, key->area) != NULL) |
| /* update entry if it exists */ |
| pat_ref_set(ref, key->area, value->area, NULL); |
| else |
| /* insert a new entry */ |
| pat_ref_add(ref, key->area, value->area, NULL); |
| HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock); |
| free_trash_chunk(key); |
| free_trash_chunk(value); |
| break; |
| } |
| |
| case ACT_HTTP_EARLY_HINT: |
| if (!(txn->req.flags & HTTP_MSGF_VER_11)) |
| break; |
| early_hints = http_add_early_hint_header(s, early_hints, |
| ist2(rule->arg.early_hint.name, rule->arg.early_hint.name_len), |
| &rule->arg.early_hint.fmt); |
| if (early_hints == -1) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| break; |
| |
| case ACT_CUSTOM: |
| if ((s->req.flags & CF_READ_ERROR) || |
| ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) && |
| (px->options & PR_O_ABRT_CLOSE))) |
| act_flags |= ACT_FLAG_FINAL; |
| |
| switch (rule->action_ptr(rule, px, s->sess, s, act_flags)) { |
| case ACT_RET_ERR: |
| case ACT_RET_CONT: |
| break; |
| case ACT_RET_STOP: |
| rule_ret = HTTP_RULE_RES_STOP; |
| goto end; |
| case ACT_RET_DONE: |
| rule_ret = HTTP_RULE_RES_DONE; |
| goto end; |
| case ACT_RET_YIELD: |
| s->current_rule = rule; |
| rule_ret = HTTP_RULE_RES_YIELD; |
| goto end; |
| } |
| break; |
| |
| case ACT_ACTION_TRK_SC0 ... ACT_ACTION_TRK_SCMAX: |
| /* Note: only the first valid tracking parameter of each |
| * applies. |
| */ |
| |
| if (stkctr_entry(&s->stkctr[trk_idx(rule->action)]) == NULL) { |
| struct stktable *t; |
| struct stksess *ts; |
| struct stktable_key *key; |
| void *ptr1, *ptr2; |
| |
| t = rule->arg.trk_ctr.table.t; |
| key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL, |
| rule->arg.trk_ctr.expr, NULL); |
| |
| if (key && (ts = stktable_get_entry(t, key))) { |
| stream_track_stkctr(&s->stkctr[trk_idx(rule->action)], t, ts); |
| |
| /* let's count a new HTTP request as it's the first time we do it */ |
| ptr1 = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_CNT); |
| ptr2 = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_RATE); |
| if (ptr1 || ptr2) { |
| HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock); |
| |
| if (ptr1) |
| stktable_data_cast(ptr1, http_req_cnt)++; |
| |
| if (ptr2) |
| update_freq_ctr_period(&stktable_data_cast(ptr2, http_req_rate), |
| t->data_arg[STKTABLE_DT_HTTP_REQ_RATE].u, 1); |
| |
| HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock); |
| |
| /* If data was modified, we need to touch to re-schedule sync */ |
| stktable_touch_local(t, ts, 0); |
| } |
| |
| stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_CONTENT); |
| if (sess->fe != s->be) |
| stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_BACKEND); |
| } |
| } |
| break; |
| |
| /* other flags exists, but normally, they never be matched. */ |
| default: |
| break; |
| } |
| } |
| |
| end: |
| if (early_hints) { |
| if (http_reply_103_early_hints(&s->res) == -1) |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| } |
| |
| /* we reached the end of the rules, nothing to report */ |
| return rule_ret; |
| } |
| |
| /* Executes the http-response rules <rules> for stream <s> and proxy <px>. It |
| * returns one of 5 possible statuses: HTTP_RULE_RES_CONT, HTTP_RULE_RES_STOP, |
| * HTTP_RULE_RES_DONE, HTTP_RULE_RES_YIELD, or HTTP_RULE_RES_BADREQ. If *CONT |
| * is returned, the process can continue the evaluation of next rule list. If |
| * *STOP or *DONE is returned, the process must stop the evaluation. If *BADREQ |
| * is returned, it means the operation could not be processed and a server error |
| * must be returned. It may set the TX_SVDENY on txn->flags if it encounters a |
| * deny rule. If *YIELD is returned, the caller must call again the function |
| * with the same context. |
| */ |
| static enum rule_result http_res_get_intercept_rule(struct proxy *px, struct list *rules, |
| struct stream *s) |
| { |
| struct session *sess = strm_sess(s); |
| struct http_txn *txn = s->txn; |
| struct htx *htx; |
| struct act_rule *rule; |
| struct http_hdr_ctx ctx; |
| enum rule_result rule_ret = HTTP_RULE_RES_CONT; |
| int act_flags = 0; |
| |
| htx = htxbuf(&s->res.buf); |
| |
| /* If "the current_rule_list" match the executed rule list, we are in |
| * resume condition. If a resume is needed it is always in the action |
| * and never in the ACL or converters. In this case, we initialise the |
| * current rule, and go to the action execution point. |
| */ |
| if (s->current_rule) { |
| rule = s->current_rule; |
| s->current_rule = NULL; |
| if (s->current_rule_list == rules) |
| goto resume_execution; |
| } |
| s->current_rule_list = rules; |
| |
| list_for_each_entry(rule, rules, list) { |
| /* check optional condition */ |
| if (rule->cond) { |
| int ret; |
| |
| ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL); |
| ret = acl_pass(ret); |
| |
| if (rule->cond->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| |
| if (!ret) /* condition not matched */ |
| continue; |
| } |
| |
| act_flags |= ACT_FLAG_FIRST; |
| resume_execution: |
| switch (rule->action) { |
| case ACT_ACTION_ALLOW: |
| rule_ret = HTTP_RULE_RES_STOP; /* "allow" rules are OK */ |
| goto end; |
| |
| case ACT_ACTION_DENY: |
| txn->flags |= TX_SVDENY; |
| rule_ret = HTTP_RULE_RES_STOP; |
| goto end; |
| |
| case ACT_HTTP_SET_NICE: |
| s->task->nice = rule->arg.nice; |
| break; |
| |
| case ACT_HTTP_SET_TOS: |
| conn_set_tos(objt_conn(sess->origin), rule->arg.tos); |
| break; |
| |
| case ACT_HTTP_SET_MARK: |
| conn_set_mark(objt_conn(sess->origin), rule->arg.mark); |
| break; |
| |
| case ACT_HTTP_SET_LOGL: |
| s->logs.level = rule->arg.loglevel; |
| break; |
| |
| case ACT_HTTP_REPLACE_HDR: |
| case ACT_HTTP_REPLACE_VAL: |
| if (http_transform_header(s, &s->res, htx, |
| ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), |
| &rule->arg.hdr_add.fmt, |
| rule->arg.hdr_add.re, rule->action)) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| break; |
| |
| case ACT_HTTP_DEL_HDR: |
| /* remove all occurrences of the header */ |
| ctx.blk = NULL; |
| while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1)) |
| http_remove_header(htx, &ctx); |
| break; |
| |
| case ACT_HTTP_SET_HDR: |
| case ACT_HTTP_ADD_HDR: { |
| struct buffer *replace; |
| struct ist n, v; |
| |
| replace = alloc_trash_chunk(); |
| if (!replace) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| |
| replace->data = build_logline(s, replace->area, replace->size, &rule->arg.hdr_add.fmt); |
| n = ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len); |
| v = ist2(replace->area, replace->data); |
| |
| if (rule->action == ACT_HTTP_SET_HDR) { |
| /* remove all occurrences of the header */ |
| ctx.blk = NULL; |
| while (http_find_header(htx, ist2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len), &ctx, 1)) |
| http_remove_header(htx, &ctx); |
| } |
| |
| if (!http_add_header(htx, n, v)) { |
| static unsigned char rate_limit = 0; |
| |
| if ((rate_limit++ & 255) == 0) { |
| send_log(px, LOG_WARNING, "Proxy %s failed to add or set the response header '%.*s' for request #%u. You might need to increase tune.maxrewrite.", px->id, (int)n.len, n.ptr, s->uniq_id); |
| } |
| |
| _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_rewrites, 1); |
| if (sess->fe != s->be) |
| _HA_ATOMIC_ADD(&s->be->be_counters.failed_rewrites, 1); |
| if (sess->listener->counters) |
| _HA_ATOMIC_ADD(&sess->listener->counters->failed_rewrites, 1); |
| if (objt_server(s->target)) |
| _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_rewrites, 1); |
| } |
| free_trash_chunk(replace); |
| break; |
| } |
| |
| case ACT_HTTP_DEL_ACL: |
| case ACT_HTTP_DEL_MAP: { |
| struct pat_ref *ref; |
| struct buffer *key; |
| |
| /* collect reference */ |
| ref = pat_ref_lookup(rule->arg.map.ref); |
| if (!ref) |
| continue; |
| |
| /* allocate key */ |
| key = alloc_trash_chunk(); |
| if (!key) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| |
| /* collect key */ |
| key->data = build_logline(s, key->area, key->size, &rule->arg.map.key); |
| key->area[key->data] = '\0'; |
| |
| /* perform update */ |
| /* returned code: 1=ok, 0=ko */ |
| HA_SPIN_LOCK(PATREF_LOCK, &ref->lock); |
| pat_ref_delete(ref, key->area); |
| HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock); |
| |
| free_trash_chunk(key); |
| break; |
| } |
| |
| case ACT_HTTP_ADD_ACL: { |
| struct pat_ref *ref; |
| struct buffer *key; |
| |
| /* collect reference */ |
| ref = pat_ref_lookup(rule->arg.map.ref); |
| if (!ref) |
| continue; |
| |
| /* allocate key */ |
| key = alloc_trash_chunk(); |
| if (!key) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| |
| /* collect key */ |
| key->data = build_logline(s, key->area, key->size, &rule->arg.map.key); |
| key->area[key->data] = '\0'; |
| |
| /* perform update */ |
| /* check if the entry already exists */ |
| HA_SPIN_LOCK(PATREF_LOCK, &ref->lock); |
| if (pat_ref_find_elt(ref, key->area) == NULL) |
| pat_ref_add(ref, key->area, NULL, NULL); |
| HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock); |
| free_trash_chunk(key); |
| break; |
| } |
| |
| case ACT_HTTP_SET_MAP: { |
| struct pat_ref *ref; |
| struct buffer *key, *value; |
| |
| /* collect reference */ |
| ref = pat_ref_lookup(rule->arg.map.ref); |
| if (!ref) |
| continue; |
| |
| /* allocate key */ |
| key = alloc_trash_chunk(); |
| if (!key) { |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| |
| /* allocate value */ |
| value = alloc_trash_chunk(); |
| if (!value) { |
| free_trash_chunk(key); |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| } |
| |
| /* collect key */ |
| key->data = build_logline(s, key->area, key->size, &rule->arg.map.key); |
| key->area[key->data] = '\0'; |
| |
| /* collect value */ |
| value->data = build_logline(s, value->area, value->size, &rule->arg.map.value); |
| value->area[value->data] = '\0'; |
| |
| /* perform update */ |
| HA_SPIN_LOCK(PATREF_LOCK, &ref->lock); |
| if (pat_ref_find_elt(ref, key->area) != NULL) |
| /* update entry if it exists */ |
| pat_ref_set(ref, key->area, value->area, NULL); |
| else |
| /* insert a new entry */ |
| pat_ref_add(ref, key->area, value->area, NULL); |
| HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock); |
| free_trash_chunk(key); |
| free_trash_chunk(value); |
| break; |
| } |
| |
| case ACT_HTTP_REDIR: |
| rule_ret = HTTP_RULE_RES_DONE; |
| if (!http_apply_redirect_rule(rule->arg.redir, s, txn)) |
| rule_ret = HTTP_RULE_RES_BADREQ; |
| goto end; |
| |
| case ACT_ACTION_TRK_SC0 ... ACT_ACTION_TRK_SCMAX: |
| /* Note: only the first valid tracking parameter of each |
| * applies. |
| */ |
| if (stkctr_entry(&s->stkctr[trk_idx(rule->action)]) == NULL) { |
| struct stktable *t; |
| struct stksess *ts; |
| struct stktable_key *key; |
| void *ptr; |
| |
| t = rule->arg.trk_ctr.table.t; |
| key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_RES | SMP_OPT_FINAL, |
| rule->arg.trk_ctr.expr, NULL); |
| |
| if (key && (ts = stktable_get_entry(t, key))) { |
| stream_track_stkctr(&s->stkctr[trk_idx(rule->action)], t, ts); |
| |
| HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock); |
| |
| /* let's count a new HTTP request as it's the first time we do it */ |
| ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_CNT); |
| if (ptr) |
| stktable_data_cast(ptr, http_req_cnt)++; |
| |
| ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_RATE); |
| if (ptr) |
| update_freq_ctr_period(&stktable_data_cast(ptr, http_req_rate), |
| t->data_arg[STKTABLE_DT_HTTP_REQ_RATE].u, 1); |
| |
| /* 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. Normally this is done when receiving the response |
| * but here we're tracking after this ought to have been done so we have |
| * to do it on purpose. |
| */ |
| if ((unsigned)(txn->status - 400) < 100) { |
| ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_ERR_CNT); |
| if (ptr) |
| stktable_data_cast(ptr, http_err_cnt)++; |
| |
| ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_ERR_RATE); |
| if (ptr) |
| update_freq_ctr_period(&stktable_data_cast(ptr, http_err_rate), |
| t->data_arg[STKTABLE_DT_HTTP_ERR_RATE].u, 1); |
| } |
| |
| HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock); |
| |
| /* If data was modified, we need to touch to re-schedule sync */ |
| stktable_touch_local(t, ts, 0); |
| |
| stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_CONTENT); |
| if (sess->fe != s->be) |
| stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_BACKEND); |
| } |
| } |
| break; |
| |
| case ACT_CUSTOM: |
| if ((s->req.flags & CF_READ_ERROR) || |
| ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) && |
| (px->options & PR_O_ABRT_CLOSE))) |
| act_flags |= ACT_FLAG_FINAL; |
| |
| switch (rule->action_ptr(rule, px, s->sess, s, act_flags)) { |
| case ACT_RET_ERR: |
| case ACT_RET_CONT: |
| break; |
| case ACT_RET_STOP: |
| rule_ret = HTTP_RULE_RES_STOP; |
| goto end; |
| case ACT_RET_DONE: |
| rule_ret = HTTP_RULE_RES_DONE; |
| goto end; |
| case ACT_RET_YIELD: |
| s->current_rule = rule; |
| rule_ret = HTTP_RULE_RES_YIELD; |
| goto end; |
| } |
| break; |
| |
| /* other flags exists, but normally, they never be matched. */ |
| default: |
| break; |
| } |
| } |
| |
| end: |
| /* we reached the end of the rules, nothing to report */ |
| return rule_ret; |
| } |
| |
| /* |
| * 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 ! |
| */ |
| static void http_manage_client_side_cookies(struct stream *s, struct channel *req) |
| { |
| struct session *sess = s->sess; |
| struct http_txn *txn = s->txn; |
| struct htx *htx; |
| struct http_hdr_ctx ctx; |
| char *hdr_beg, *hdr_end, *del_from; |
| char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next; |
| int preserve_hdr; |
| |
| htx = htxbuf(&req->buf); |
| ctx.blk = NULL; |
| while (http_find_header(htx, ist("Cookie"), &ctx, 1)) { |
| int is_first = 1; |
| 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 : |
| * |
| * hdr_beg hdr_end |
| * | | |
| * v | |
| * NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3 | |
| * NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3 v |
| * NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3 |
| * | | | | | | | |
| * | | | | | | | |
| * | | | | | | +--> next |
| * | | | | | +----> val_end |
| * | | | | +-----------> val_beg |
| * | | | +--------------> equal |
| * | | +----------------> att_end |
| * | +---------------------> att_beg |
| * +--------------------------> prev |
| * |
| */ |
| hdr_beg = ctx.value.ptr; |
| hdr_end = hdr_beg + ctx.value.len; |
| for (prev = hdr_beg; prev < hdr_end; prev = next) { |
| /* Iterate through all cookies on this line */ |
| |
| /* find att_beg */ |
| att_beg = prev; |
| if (!is_first) |
| att_beg++; |
| is_first = 0; |
| |
| while (att_beg < hdr_end && HTTP_IS_SPHT(*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(*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(*val_beg)) |
| val_beg++; |
| |
| /* find the end of the value, respecting quotes */ |
| next = http_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(*(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 = http_del_hdr_value(hdr_beg, hdr_end, &del_from, prev); |
| val_end += delta; |
| next += delta; |
| hdr_end += 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) { |
| memmove(att_end, equal, hdr_end - equal); |
| stripped_before = (att_end - equal); |
| equal += stripped_before; |
| val_beg += stripped_before; |
| } |
| |
| if (val_beg > equal + 1) { |
| memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg); |
| stripped_after = (equal + 1) - val_beg; |
| val_beg += stripped_after; |
| stripped_before += stripped_after; |
| } |
| |
| val_end += stripped_before; |
| next += stripped_before; |
| hdr_end += 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 (sess->fe->capture_name != NULL && txn->cli_cookie == NULL && |
| (val_end - att_beg >= sess->fe->capture_namelen) && |
| memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) { |
| int log_len = val_end - att_beg; |
| |
| if ((txn->cli_cookie = pool_alloc(pool_head_capture)) == NULL) { |
| ha_alert("HTTP logging : out of memory.\n"); |
| } else { |
| if (log_len > sess->fe->capture_len) |
| log_len = sess->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 == s->be->cookie_len) && (s->be->cookie_name != NULL) && |
| (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) { |
| struct server *srv = s->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 : |
| * |
| * hdr_beg |
| * | |
| * v |
| * NAME=SRV; # in all but prefix modes |
| * NAME=SRV~OPAQUE ; # in prefix mode |
| * || || | |+-> next |
| * || || | +--> val_end |
| * || || +---------> delim |
| * || |+------------> val_beg |
| * || +-------------> att_end = equal |
| * |+-----------------> att_beg |
| * +------------------> prev |
| * |
| */ |
| if (s->be->ck_opts & PR_CK_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 && s->be->cookie_maxlife && |
| (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)s->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 && s->be->cookie_maxidle && |
| (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)s->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) || (s->flags & (SF_IGNORE_PRST | SF_ASSIGNED))) |
| srv = NULL; |
| |
| while (srv) { |
| if (srv->cookie && (srv->cklen == delim - val_beg) && |
| !memcmp(val_beg, srv->cookie, delim - val_beg)) { |
| if ((srv->cur_state != SRV_ST_STOPPED) || |
| (s->be->options & PR_O_PERSIST) || |
| (s->flags & SF_FORCE_PRST)) { |
| /* we found the server and we can use it */ |
| txn->flags &= ~TX_CK_MASK; |
| txn->flags |= (srv->cur_state != SRV_ST_STOPPED) ? TX_CK_VALID : TX_CK_DOWN; |
| s->flags |= SF_DIRECT | SF_ASSIGNED; |
| s->target = &srv->obj_type; |
| 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 or we deliberately skipped it */ |
| txn->flags &= ~TX_CK_MASK; |
| if ((s->flags & (SF_IGNORE_PRST | SF_ASSIGNED))) |
| txn->flags |= TX_CK_UNUSED; |
| else |
| 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 accidentally removed later, |
| * if we're in cookie prefix mode |
| */ |
| if ((s->be->ck_opts & PR_CK_PFX) && (delim != val_end)) { |
| int delta; /* negative */ |
| |
| memmove(val_beg, delim + 1, hdr_end - (delim + 1)); |
| delta = val_beg - (delim + 1); |
| val_end += delta; |
| next += delta; |
| hdr_end += delta; |
| del_from = NULL; |
| preserve_hdr = 1; /* we want to keep this cookie */ |
| } |
| else if (del_from == NULL && |
| (s->be->ck_opts & (PR_CK_INS | PR_CK_IND)) == (PR_CK_INS | PR_CK_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 = http_del_hdr_value(hdr_beg, hdr_end, &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; |
| prev = del_from; |
| del_from = NULL; |
| } |
| } |
| |
| /* 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) { |
| hdr_end = (preserve_hdr ? del_from : hdr_beg); |
| } |
| if ((hdr_end - hdr_beg) != ctx.value.len) { |
| if (hdr_beg != hdr_end) |
| htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg); |
| else |
| http_remove_header(htx, &ctx); |
| } |
| } /* for each "Cookie header */ |
| } |
| |
| /* |
| * 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). |
| */ |
| static void http_manage_server_side_cookies(struct stream *s, struct channel *res) |
| { |
| struct session *sess = s->sess; |
| struct http_txn *txn = s->txn; |
| struct htx *htx; |
| struct http_hdr_ctx ctx; |
| struct server *srv; |
| char *hdr_beg, *hdr_end; |
| char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next; |
| int is_cookie2 = 0; |
| |
| htx = htxbuf(&res->buf); |
| |
| ctx.blk = NULL; |
| while (1) { |
| int is_first = 1; |
| |
| if (!http_find_header(htx, ist("Set-Cookie"), &ctx, 1)) { |
| if (!http_find_header(htx, ist("Set-Cookie2"), &ctx, 1)) |
| break; |
| is_cookie2 = 1; |
| } |
| |
| /* 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 (s->be->cookie_name == NULL && sess->fe->capture_name == NULL) |
| break; |
| |
| /* 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 : |
| * |
| * hdr_beg hdr_end |
| * | | |
| * v | |
| * NAME1 = VALUE 1 ; Secure; Path="/" | |
| * NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT v |
| * NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT |
| * NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard |
| * | | | | | | | | |
| * | | | | | | | +-> next |
| * | | | | | | +------------> scav |
| * | | | | | +--------------> val_end |
| * | | | | +--------------------> val_beg |
| * | | | +----------------------> equal |
| * | | +------------------------> att_end |
| * | +----------------------------> att_beg |
| * +------------------------------> prev |
| * -------------------------------> hdr_beg |
| */ |
| hdr_beg = ctx.value.ptr; |
| hdr_end = hdr_beg + ctx.value.len; |
| for (prev = hdr_beg; prev < hdr_end; prev = next) { |
| |
| /* Iterate through all cookies on this line */ |
| |
| /* find att_beg */ |
| att_beg = prev; |
| if (!is_first) |
| att_beg++; |
| is_first = 0; |
| |
| while (att_beg < hdr_end && HTTP_IS_SPHT(*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(*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(*val_beg)) |
| val_beg++; |
| |
| /* find the end of the value, respecting quotes */ |
| next = http_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(*(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 = http_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) { |
| memmove(att_end, equal, hdr_end - equal); |
| stripped_before = (att_end - equal); |
| equal += stripped_before; |
| val_beg += stripped_before; |
| } |
| |
| if (val_beg > equal + 1) { |
| memmove(equal + 1, val_beg, hdr_end + stripped_before - val_beg); |
| stripped_after = (equal + 1) - val_beg; |
| val_beg += stripped_after; |
| stripped_before += stripped_after; |
| } |
| |
| val_end += stripped_before; |
| next += stripped_before; |
| hdr_end += stripped_before; |
| |
| htx_change_blk_value_len(htx, ctx.blk, hdr_end - hdr_beg); |
| ctx.value.len = hdr_end - hdr_beg; |
| } |
| |
| /* 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 (sess->fe->capture_name != NULL && |
| txn->srv_cookie == NULL && |
| (val_end - att_beg >= sess->fe->capture_namelen) && |
| memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) { |
| int log_len = val_end - att_beg; |
| if ((txn->srv_cookie = pool_alloc(pool_head_capture)) == NULL) { |
| ha_alert("HTTP logging : out of memory.\n"); |
| } |
| else { |
| if (log_len > sess->fe->capture_len) |
| log_len = sess->fe->capture_len; |
| memcpy(txn->srv_cookie, att_beg, log_len); |
| txn->srv_cookie[log_len] = 0; |
| } |
| } |
| |
| srv = objt_server(s->target); |
| /* now check if we need to process it for persistence */ |
| if (!(s->flags & SF_IGNORE_PRST) && |
| (att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) && |
| (memcmp(att_beg, s->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 (s->be->ck_opts & PR_CK_PSV) { |
| /* The "preserve" flag was set, we don't want to touch the |
| * server's cookie. |
| */ |
| } |
| else if ((srv && (s->be->ck_opts & PR_CK_INS)) || |
| ((s->flags & SF_DIRECT) && (s->be->ck_opts & PR_CK_IND))) { |
| /* this cookie must be deleted */ |
| if (prev == hdr_beg && next == hdr_end) { |
| /* whole header */ |
| http_remove_header(htx, &ctx); |
| /* 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 = http_del_hdr_value(hdr_beg, hdr_end, &prev, next); |
| next = prev; |
| hdr_end += delta; |
| } |
| txn->flags &= ~TX_SCK_MASK; |
| txn->flags |= TX_SCK_DELETED; |
| /* and go on with next cookie */ |
| } |
| else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_RW)) { |
| /* replace bytes val_beg->val_end with the cookie name associated |
| * with this server since we know it. |
| */ |
| int sliding, delta; |
| |
| ctx.value = ist2(val_beg, val_end - val_beg); |
| ctx.lws_before = ctx.lws_after = 0; |
| http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen)); |
| delta = srv->cklen - (val_end - val_beg); |
| sliding = (ctx.value.ptr - val_beg); |
| hdr_beg += sliding; |
| val_beg += sliding; |
| next += sliding + delta; |
| hdr_end += sliding + delta; |
| |
| txn->flags &= ~TX_SCK_MASK; |
| txn->flags |= TX_SCK_REPLACED; |
| } |
| else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_PFX)) { |
| /* insert the cookie name associated with this server |
| * before existing cookie, and insert a delimiter between them.. |
| */ |
| int sliding, delta; |
| ctx.value = ist2(val_beg, 0); |
| ctx.lws_before = ctx.lws_after = 0; |
| http_replace_header_value(htx, &ctx, ist2(srv->cookie, srv->cklen + 1)); |
| delta = srv->cklen + 1; |
| sliding = (ctx.value.ptr - val_beg); |
| hdr_beg += sliding; |
| val_beg += sliding; |
| next += sliding + delta; |
| hdr_end += sliding + delta; |
| |
| val_beg[srv->cklen] = COOKIE_DELIM; |
| txn->flags &= ~TX_SCK_MASK; |
| txn->flags |= TX_SCK_REPLACED; |
| } |
| } |
| /* that's done for this cookie, check the next one on the same |
| * line when next != hdr_end (only if is_cookie2). |
| */ |
| } |
| } |
| } |
| |
| /* |
| * Parses the Cache-Control and Pragma request header fields to determine if |
| * the request may be served from the cache and/or if it is cacheable. Updates |
| * s->txn->flags. |
| */ |
| void http_check_request_for_cacheability(struct stream *s, struct channel *req) |
| { |
| struct http_txn *txn = s->txn; |
| struct htx *htx; |
| int32_t pos; |
| int pragma_found, cc_found, i; |
| |
| if ((txn->flags & (TX_CACHEABLE|TX_CACHE_IGNORE)) == TX_CACHE_IGNORE) |
| return; /* nothing more to do here */ |
| |
| htx = htxbuf(&req->buf); |
| pragma_found = cc_found = 0; |
| for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) { |
| struct htx_blk *blk = htx_get_blk(htx, pos); |
| enum htx_blk_type type = htx_get_blk_type(blk); |
| struct ist n, v; |
| |
| if (type == HTX_BLK_EOH) |
| break; |
| if (type != HTX_BLK_HDR) |
| continue; |
| |
| n = htx_get_blk_name(htx, blk); |
| v = htx_get_blk_value(htx, blk); |
| |
| if (isteq(n, ist("pragma"))) { |
| if (v.len >= 8 && strncasecmp(v.ptr, "no-cache", 8) == 0) { |
| pragma_found = 1; |
| continue; |
| } |
| } |
| |
| /* Don't use the cache and don't try to store if we found the |
| * Authorization header */ |
| if (isteq(n, ist("authorization"))) { |
| txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK; |
| txn->flags |= TX_CACHE_IGNORE; |
| continue; |
| } |
| |
| if (!isteq(n, ist("cache-control"))) |
| continue; |
| |
| /* OK, right now we know we have a cache-control header */ |
| cc_found = 1; |
| if (!v.len) /* no info */ |
| continue; |
| |
| i = 0; |
| while (i < v.len && *(v.ptr+i) != '=' && *(v.ptr+i) != ',' && |
| !isspace((unsigned char)*(v.ptr+i))) |
| i++; |
| |
| /* we have a complete value between v.ptr and (v.ptr+i). We don't check the |
| * values after max-age, max-stale nor min-fresh, we simply don't |
| * use the cache when they're specified. |
| */ |
| if (((i == 7) && strncasecmp(v.ptr, "max-age", 7) == 0) || |
| ((i == 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) || |
| ((i == 9) && strncasecmp(v.ptr, "max-stale", 9) == 0) || |
| ((i == 9) && strncasecmp(v.ptr, "min-fresh", 9) == 0)) { |
| txn->flags |= TX_CACHE_IGNORE; |
| continue; |
| } |
| |
| if ((i == 8) && strncasecmp(v.ptr, "no-store", 8) == 0) { |
| txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK; |
| continue; |
| } |
| } |
| |
| /* RFC7234#5.4: |
| * When the Cache-Control header field is also present and |
| * understood in a request, Pragma is ignored. |
| * When the Cache-Control header field is not present in a |
| * request, caches MUST consider the no-cache request |
| * pragma-directive as having the same effect as if |
| * "Cache-Control: no-cache" were present. |
| */ |
| if (!cc_found && pragma_found) |
| txn->flags |= TX_CACHE_IGNORE; |
| } |
| |
| /* |
| * Check if response is cacheable or not. Updates s->txn->flags. |
| */ |
| void http_check_response_for_cacheability(struct stream *s, struct channel *res) |
| { |
| struct http_txn *txn = s->txn; |
| struct htx *htx; |
| int32_t pos; |
| int i; |
| |
| if (txn->status < 200) { |
| /* do not try to cache interim responses! */ |
| txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK; |
| return; |
| } |
| |
| htx = htxbuf(&res->buf); |
| for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) { |
| struct htx_blk *blk = htx_get_blk(htx, pos); |
| enum htx_blk_type type = htx_get_blk_type(blk); |
| struct ist n, v; |
| |
| if (type == HTX_BLK_EOH) |
| break; |
| if (type != HTX_BLK_HDR) |
| continue; |
| |
| n = htx_get_blk_name(htx, blk); |
| v = htx_get_blk_value(htx, blk); |
| |
| if (isteq(n, ist("pragma"))) { |
| if ((v.len >= 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) { |
| txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK; |
| return; |
| } |
| } |
| |
| if (!isteq(n, ist("cache-control"))) |
| continue; |
| |
| /* OK, right now we know we have a cache-control header */ |
| if (!v.len) /* no info */ |
| continue; |
| |
| i = 0; |
| while (i < v.len && *(v.ptr+i) != '=' && *(v.ptr+i) != ',' && |
| !isspace((unsigned char)*(v.ptr+i))) |
| i++; |
| |
| /* we have a complete value between v.ptr and (v.ptr+i) */ |
| if (i < v.len && *(v.ptr + i) == '=') { |
| if (((v.len - i) > 1 && (i == 7) && strncasecmp(v.ptr, "max-age=0", 9) == 0) || |
| ((v.len - i) > 1 && (i == 8) && strncasecmp(v.ptr, "s-maxage=0", 10) == 0)) { |
| txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK; |
| continue; |
| } |
| |
| /* we have something of the form no-cache="set-cookie" */ |
| if ((v.len >= 21) && |
| strncasecmp(v.ptr, "no-cache=\"set-cookie", 20) == 0 |
| && (*(v.ptr + 20) == '"' || *(v.ptr + 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 (((i == 7) && strncasecmp(v.ptr, "private", 7) == 0) || |
| ((i == 8) && strncasecmp(v.ptr, "no-cache", 8) == 0) || |
| ((i == 8) && strncasecmp(v.ptr, "no-store", 8) == 0)) { |
| txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK; |
| return; |
| } |
| |
| if ((i == 6) && strncasecmp(v.ptr, "public", 6) == 0) { |
| txn->flags |= TX_CACHEABLE | TX_CACHE_COOK; |
| continue; |
| } |
| } |
| } |
| |
| /* send a server's name with an outgoing request over an established connection. |
| * Note: this function is designed to be called once the request has been |
| * scheduled for being forwarded. This is the reason why the number of forwarded |
| * bytes have to be adjusted. |
| */ |
| int http_send_name_header(struct stream *s, struct proxy *be, const char *srv_name) |
| { |
| struct htx *htx; |
| struct http_hdr_ctx ctx; |
| struct ist hdr; |
| uint32_t data; |
| |
| hdr = ist2(be->server_id_hdr_name, be->server_id_hdr_len); |
| htx = htxbuf(&s->req.buf); |
| data = htx->data; |
| |
| ctx.blk = NULL; |
| while (http_find_header(htx, hdr, &ctx, 1)) |
| http_remove_header(htx, &ctx); |
| http_add_header(htx, hdr, ist2(srv_name, strlen(srv_name))); |
| |
| if (co_data(&s->req)) { |
| if (data >= htx->data) |
| c_rew(&s->req, data - htx->data); |
| else |
| c_adv(&s->req, htx->data - data); |
| } |
| return 0; |
| } |
| |
| /* |
| * 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 |
| * uri_auth field is valid. |
| * |
| * Returns 1 if stats should be provided, otherwise 0. |
| */ |
| static int http_stats_check_uri(struct stream *s, struct http_txn *txn, struct proxy *backend) |
| { |
| struct uri_auth *uri_auth = backend->uri_auth; |
| struct htx *htx; |
| struct htx_sl *sl; |
| struct ist uri; |
| |
| if (!uri_auth) |
| return 0; |
| |
| if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD && txn->meth != HTTP_METH_POST) |
| return 0; |
| |
| htx = htxbuf(&s->req.buf); |
| sl = http_get_stline(htx); |
| uri = htx_sl_req_uri(sl); |
| |
| /* check URI size */ |
| if (uri_auth->uri_len > uri.len) |
| return 0; |
| |
| if (memcmp(uri.ptr, uri_auth->uri_prefix, uri_auth->uri_len) != 0) |
| return 0; |
| |
| return 1; |
| } |
| |
| /* This function prepares an applet to handle the stats. It can deal with the |
| * "100-continue" expectation, check that admin rules are met for POST requests, |
| * and program a response message if something was unexpected. It cannot fail |
| * and always relies on the stats applet to complete the job. It does not touch |
| * analysers nor counters, which are left to the caller. It does not touch |
| * s->target which is supposed to already point to the stats applet. The caller |
| * is expected to have already assigned an appctx to the stream. |
| */ |
| static int http_handle_stats(struct stream *s, struct channel *req) |
| { |
| struct stats_admin_rule *stats_admin_rule; |
| struct stream_interface *si = &s->si[1]; |
| struct session *sess = s->sess; |
| struct http_txn *txn = s->txn; |
| struct http_msg *msg = &txn->req; |
| struct uri_auth *uri_auth = s->be->uri_auth; |
| const char *h, *lookup, *end; |
| struct appctx *appctx; |
| struct htx *htx; |
| struct htx_sl *sl; |
| |
| appctx = si_appctx(si); |
| memset(&appctx->ctx.stats, 0, sizeof(appctx->ctx.stats)); |
| appctx->st1 = appctx->st2 = 0; |
| appctx->ctx.stats.st_code = STAT_STATUS_INIT; |
| appctx->ctx.stats.flags |= STAT_FMT_HTML; /* assume HTML mode by default */ |
| if ((msg->flags & HTTP_MSGF_VER_11) && (txn->meth != HTTP_METH_HEAD)) |
| appctx->ctx.stats.flags |= STAT_CHUNKED; |
| |
| htx = htxbuf(&req->buf); |
| sl = http_get_stline(htx); |
| lookup = HTX_SL_REQ_UPTR(sl) + uri_auth->uri_len; |
| end = HTX_SL_REQ_UPTR(sl) + HTX_SL_REQ_ULEN(sl); |
| |
| for (h = lookup; h <= end - 3; h++) { |
| if (memcmp(h, ";up", 3) == 0) { |
| appctx->ctx.stats.flags |= STAT_HIDE_DOWN; |
| break; |
| } |
| } |
| |
| if (uri_auth->refresh) { |
| for (h = lookup; h <= end - 10; h++) { |
| if (memcmp(h, ";norefresh", 10) == 0) { |
| appctx->ctx.stats.flags |= STAT_NO_REFRESH; |
| break; |
| } |
| } |
| } |
| |
| for (h = lookup; h <= end - 4; h++) { |
| if (memcmp(h, ";csv", 4) == 0) { |
| appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM); |
| break; |
| } |
| } |
| |
| for (h = lookup; h <= end - 6; h++) { |
| if (memcmp(h, ";typed", 6) == 0) { |
| appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM); |
| appctx->ctx.stats.flags |= STAT_FMT_TYPED; |
| break; |
| } |
| } |
| |
| for (h = lookup; h <= end - 5; h++) { |
| if (memcmp(h, ";json", 5) == 0) { |
| appctx->ctx.stats.flags &= ~(STAT_FMT_MASK|STAT_JSON_SCHM); |
| appctx->ctx.stats.flags |= STAT_FMT_JSON; |
| break; |
| } |
| } |
| |
| for (h = lookup; h <= end - 12; h++) { |
| if (memcmp(h, ";json-schema", 12) == 0) { |
| appctx->ctx.stats.flags &= ~STAT_FMT_MASK; |
| appctx->ctx.stats.flags |= STAT_JSON_SCHM; |
| break; |
| } |
| } |
| |
| for (h = lookup; h <= end - 8; h++) { |
| if (memcmp(h, ";st=", 4) == 0) { |
| int i; |
| h += 4; |
| appctx->ctx.stats.st_code = STAT_STATUS_UNKN; |
| for (i = STAT_STATUS_INIT + 1; i < STAT_STATUS_SIZE; i++) { |
| if (strncmp(stat_status_codes[i], h, 4) == 0) { |
| appctx->ctx.stats.st_code = i; |
| break; |
| } |
| } |
| break; |
| } |
| } |
| |
| appctx->ctx.stats.scope_str = 0; |
| appctx->ctx.stats.scope_len = 0; |
| for (h = lookup; h <= end - 8; h++) { |
| if (memcmp(h, STAT_SCOPE_INPUT_NAME "=", strlen(STAT_SCOPE_INPUT_NAME) + 1) == 0) { |
| int itx = 0; |
| const char *h2; |
| char scope_txt[STAT_SCOPE_TXT_MAXLEN + 1]; |
| const char *err; |
| |
| h += strlen(STAT_SCOPE_INPUT_NAME) + 1; |
| h2 = h; |
| appctx->ctx.stats.scope_str = h2 - HTX_SL_REQ_UPTR(sl); |
| while (h < end) { |
| if (*h == ';' || *h == '&' || *h == ' ') |
| break; |
| itx++; |
| h++; |
| } |
| |
| if (itx > STAT_SCOPE_TXT_MAXLEN) |
| itx = STAT_SCOPE_TXT_MAXLEN; |
| appctx->ctx.stats.scope_len = itx; |
| |
| /* scope_txt = search query, appctx->ctx.stats.scope_len is always <= STAT_SCOPE_TXT_MAXLEN */ |
| memcpy(scope_txt, h2, itx); |
| scope_txt[itx] = '\0'; |
| err = invalid_char(scope_txt); |
| if (err) { |
| /* bad char in search text => clear scope */ |
| appctx->ctx.stats.scope_str = 0; |
| appctx->ctx.stats.scope_len = 0; |
| } |
| break; |
| } |
| } |
| |
| /* now check whether we have some admin rules for this request */ |
| list_for_each_entry(stats_admin_rule, &uri_auth->admin_rules, list) { |
| int ret = 1; |
| |
| if (stats_admin_rule->cond) { |
| ret = acl_exec_cond(stats_admin_rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL); |
| ret = acl_pass(ret); |
| if (stats_admin_rule->cond->pol == ACL_COND_UNLESS) |
| ret = !ret; |
| } |
| |
| if (ret) { |
| /* no rule, or the rule matches */ |
| appctx->ctx.stats.flags |= STAT_ADMIN; |
| break; |
| } |
| } |
| |
| if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD) |
| appctx->st0 = STAT_HTTP_HEAD; |
| else if (txn->meth == HTTP_METH_POST) { |
| if (appctx->ctx.stats.flags & STAT_ADMIN) { |
| appctx->st0 = STAT_HTTP_POST; |
| if (msg->msg_state < HTTP_MSG_DATA) |
| req->analysers |= AN_REQ_HTTP_BODY; |
| } |
| else { |
| /* POST without admin level */ |
| appctx->ctx.stats.flags &= ~STAT_CHUNKED; |
| appctx->ctx.stats.st_code = STAT_STATUS_DENY; |
| appctx->st0 = STAT_HTTP_LAST; |
| } |
| } |
| else { |
| /* Unsupported method */ |
| appctx->ctx.stats.flags &= ~STAT_CHUNKED; |
| appctx->ctx.stats.st_code = STAT_STATUS_IVAL; |
| appctx->st0 = STAT_HTTP_LAST; |
| } |
| |
| s->task->nice = -32; /* small boost for HTTP statistics */ |
| return 1; |
| } |
| |
| void http_perform_server_redirect(struct stream *s, struct stream_interface *si) |
| { |
| struct channel *req = &s->req; |
| struct channel *res = &s->res; |
| struct server *srv; |
| struct htx *htx; |
| struct htx_sl *sl; |
| struct ist path, location; |
| unsigned int flags; |
| size_t data; |
| |
| /* |
| * Create the location |
| */ |
| chunk_reset(&trash); |
| |
| /* 1: add the server's prefix */ |
| /* special prefix "/" means don't change URL */ |
| srv = __objt_server(s->target); |
| if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') { |
| if (!chunk_memcat(&trash, srv->rdr_pfx, srv->rdr_len)) |
| return; |
| } |
| |
| /* 2: add the request Path */ |
| htx = htxbuf(&req->buf); |
| sl = http_get_stline(htx); |
| path = http_get_path(htx_sl_req_uri(sl)); |
| if (!path.ptr) |
| return; |
| |
| if (!chunk_memcat(&trash, path.ptr, path.len)) |
| return; |
| location = ist2(trash.area, trash.data); |
| |
| /* |
| * Create the 302 respone |
| */ |
| htx = htx_from_buf(&res->buf); |
| flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS); |
| sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, |
| ist("HTTP/1.1"), ist("302"), ist("Found")); |
| if (!sl) |
| goto fail; |
| sl->info.res.status = 302; |
| s->txn->status = 302; |
| |
| if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) || |
| !htx_add_header(htx, ist("Connection"), ist("close")) || |
| !htx_add_header(htx, ist("Content-length"), ist("0")) || |
| !htx_add_header(htx, ist("Location"), location)) |
| goto fail; |
| |
| if (!htx_add_endof(htx, HTX_BLK_EOH) || !htx_add_endof(htx, HTX_BLK_EOM)) |
| goto fail; |
| |
| /* |
| * Send the message |
| */ |
| data = htx->data - co_data(res); |
| c_adv(res, data); |
| res->total += data; |
| |
| /* return without error. */ |
| si_shutr(si); |
| si_shutw(si); |
| si->err_type = SI_ET_NONE; |
| si->state = SI_ST_CLO; |
| |
| channel_auto_read(req); |
| channel_abort(req); |
| channel_auto_close(req); |
| channel_htx_erase(req, htxbuf(&req->buf)); |
| channel_auto_read(res); |
| channel_auto_close(res); |
| |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= SF_ERR_LOCAL; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= SF_FINST_C; |
| |
| /* FIXME: we should increase a counter of redirects per server and per backend. */ |
| srv_inc_sess_ctr(srv); |
| srv_set_sess_last(srv); |
| return; |
| |
| fail: |
| /* If an error occurred, remove the incomplete HTTP response from the |
| * buffer */ |
| channel_htx_truncate(res, htx); |
| } |
| |
| /* This function terminates the request because it was completly analyzed or |
| * because an error was triggered during the body forwarding. |
| */ |
| static void http_end_request(struct stream *s) |
| { |
| struct channel *chn = &s->req; |
| struct http_txn *txn = s->txn; |
| |
| DPRINTF(stderr,"[%u] %s: stream=%p states=%s,%s req->analysers=0x%08x res->analysers=0x%08x\n", |
| now_ms, __FUNCTION__, s, |
| h1_msg_state_str(txn->req.msg_state), h1_msg_state_str(txn->rsp.msg_state), |
| s->req.analysers, s->res.analysers); |
| |
| if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR || |
| txn->rsp.msg_state == HTTP_MSG_ERROR)) { |
| channel_abort(chn); |
| channel_htx_truncate(chn, htxbuf(&chn->buf)); |
| goto end; |
| } |
| |
| if (unlikely(txn->req.msg_state < HTTP_MSG_DONE)) |
| return; |
| |
| 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) |
| channel_dont_read(chn); |
| |
| /* if the server closes the connection, we want to immediately react |
| * and close the socket to save packets and syscalls. |
| */ |
| s->si[1].flags |= SI_FL_NOHALF; |
| |
| /* In any case we've finished parsing the request so we must |
| * disable Nagle when sending data because 1) we're not going |
| * to shut this side, and 2) the server is waiting for us to |
| * send pending data. |
| */ |
| chn->flags |= CF_NEVER_WAIT; |
| |
| 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. |
| */ |
| return; |
| } |
| |
| /* 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_TUN) { |
| /* Tunnel mode will not have any analyser so it needs to |
| * poll for reads. |
| */ |
| channel_auto_read(chn); |
| if (b_data(&chn->buf)) |
| return; |
| txn->req.msg_state = HTTP_MSG_TUNNEL; |
| } |
| else { |
| /* we're not expecting any new data to come for this |
| * transaction, so we can close it. |
| * |
| * However, there is an exception if the response |
| * length is undefined. In this case, we need to wait |
| * the close from the server. The response will be |
| * switched in TUNNEL mode until the end. |
| */ |
| if (!(txn->rsp.flags & HTTP_MSGF_XFER_LEN) && |
| txn->rsp.msg_state != HTTP_MSG_CLOSED) |
| goto check_channel_flags; |
| |
| if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
| channel_shutr_now(chn); |
| channel_shutw_now(chn); |
| } |
| } |
| goto check_channel_flags; |
| } |
| |
| 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 (channel_is_empty(chn)) { |
| txn->req.msg_state = HTTP_MSG_CLOSED; |
| goto http_msg_closed; |
| } |
| else if (chn->flags & CF_SHUTW) { |
| txn->req.err_state = txn->req.msg_state; |
| txn->req.msg_state = HTTP_MSG_ERROR; |
| goto end; |
| } |
| return; |
| } |
| |
| if (txn->req.msg_state == HTTP_MSG_CLOSED) { |
| http_msg_closed: |
| /* if we don't know whether the server will close, we need to hard close */ |
| if (txn->rsp.flags & HTTP_MSGF_XFER_LEN) |
| s->si[1].flags |= SI_FL_NOLINGER; /* we want to close ASAP */ |
| /* see above in MSG_DONE why we only do this in these states */ |
| if (!(s->be->options & PR_O_ABRT_CLOSE)) |
| channel_dont_read(chn); |
| goto end; |
| } |
| |
| check_channel_flags: |
| /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */ |
| if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) { |
| /* if we've just closed an output, let's switch */ |
| txn->req.msg_state = HTTP_MSG_CLOSING; |
| goto http_msg_closing; |
| } |
| |
| end: |
| chn->analysers &= AN_REQ_FLT_END; |
| if (txn->req.msg_state == HTTP_MSG_TUNNEL && HAS_REQ_DATA_FILTERS(s)) |
| chn->analysers |= AN_REQ_FLT_XFER_DATA; |
| channel_auto_close(chn); |
| channel_auto_read(chn); |
| } |
| |
| |
| /* This function terminates the response because it was completly analyzed or |
| * because an error was triggered during the body forwarding. |
| */ |
| static void http_end_response(struct stream *s) |
| { |
| struct channel *chn = &s->res; |
| struct http_txn *txn = s->txn; |
| |
| DPRINTF(stderr,"[%u] %s: stream=%p states=%s,%s req->analysers=0x%08x res->analysers=0x%08x\n", |
| now_ms, __FUNCTION__, s, |
| h1_msg_state_str(txn->req.msg_state), h1_msg_state_str(txn->rsp.msg_state), |
| s->req.analysers, s->res.analysers); |
| |
| if (unlikely(txn->req.msg_state == HTTP_MSG_ERROR || |
| txn->rsp.msg_state == HTTP_MSG_ERROR)) { |
| channel_htx_truncate(&s->req, htxbuf(&s->req.buf)); |
| channel_abort(&s->req); |
| goto end; |
| } |
| |
| if (unlikely(txn->rsp.msg_state < HTTP_MSG_DONE)) |
| return; |
| |
| 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. |
| */ |
| /* channel_dont_read(chn); */ |
| |
| 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. |
| */ |
| return; |
| } |
| |
| /* 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_TUN) { |
| channel_auto_read(chn); |
| chn->flags |= CF_NEVER_WAIT; |
| if (b_data(&chn->buf)) |
| return; |
| txn->rsp.msg_state = HTTP_MSG_TUNNEL; |
| } |
| else { |
| /* we're not expecting any new data to come for this |
| * transaction, so we can close it. |
| */ |
| if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) { |
| channel_shutr_now(chn); |
| channel_shutw_now(chn); |
| } |
| } |
| goto check_channel_flags; |
| } |
| |
| 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 (channel_is_empty(chn)) { |
| txn->rsp.msg_state = HTTP_MSG_CLOSED; |
| goto http_msg_closed; |
| } |
| else if (chn->flags & CF_SHUTW) { |
| txn->rsp.err_state = txn->rsp.msg_state; |
| txn->rsp.msg_state = HTTP_MSG_ERROR; |
| _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1); |
| if (objt_server(s->target)) |
| _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1); |
| goto end; |
| } |
| return; |
| } |
| |
| if (txn->rsp.msg_state == HTTP_MSG_CLOSED) { |
| http_msg_closed: |
| /* drop any pending data */ |
| channel_htx_truncate(&s->req, htxbuf(&s->req.buf)); |
| channel_abort(&s->req); |
| goto end; |
| } |
| |
| check_channel_flags: |
| /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */ |
| if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) { |
| /* if we've just closed an output, let's switch */ |
| txn->rsp.msg_state = HTTP_MSG_CLOSING; |
| goto http_msg_closing; |
| } |
| |
| end: |
| chn->analysers &= AN_RES_FLT_END; |
| if (txn->rsp.msg_state == HTTP_MSG_TUNNEL && HAS_RSP_DATA_FILTERS(s)) |
| chn->analysers |= AN_RES_FLT_XFER_DATA; |
| channel_auto_close(chn); |
| channel_auto_read(chn); |
| } |
| |
| void http_server_error(struct stream *s, struct stream_interface *si, int err, |
| int finst, const struct buffer *msg) |
| { |
| channel_auto_read(si_oc(si)); |
| channel_abort(si_oc(si)); |
| channel_auto_close(si_oc(si)); |
| channel_htx_erase(si_oc(si), htxbuf(&(si_oc(si))->buf)); |
| channel_auto_close(si_ic(si)); |
| channel_auto_read(si_ic(si)); |
| |
| /* <msg> is an HTX structure. So we copy it in the response's |
| * channel */ |
| if (msg && !b_is_null(msg)) { |
| struct channel *chn = si_ic(si); |
| struct htx *htx; |
| |
| FLT_STRM_CB(s, flt_http_reply(s, s->txn->status, msg)); |
| chn->buf.data = msg->data; |
| memcpy(chn->buf.area, msg->area, msg->data); |
| htx = htx_from_buf(&chn->buf); |
| c_adv(chn, htx->data); |
| chn->total += htx->data; |
| } |
| if (!(s->flags & SF_ERR_MASK)) |
| s->flags |= err; |
| if (!(s->flags & SF_FINST_MASK)) |
| s->flags |= finst; |
| } |
| |
| void http_reply_and_close(struct stream *s, short status, struct buffer *msg) |
| { |
| channel_auto_read(&s->req); |
| channel_abort(&s->req); |
| channel_auto_close(&s->req); |
| channel_htx_erase(&s->req, htxbuf(&s->req.buf)); |
| channel_htx_truncate(&s->res, htxbuf(&s->res.buf)); |
| |
| s->txn->flags &= ~TX_WAIT_NEXT_RQ; |
| |
| /* <msg> is an HTX structure. So we copy it in the response's |
| * channel */ |
| /* FIXME: It is a problem for now if there is some outgoing data */ |
| if (msg && !b_is_null(msg)) { |
| struct channel *chn = &s->res; |
| struct htx *htx; |
| |
| FLT_STRM_CB(s, flt_http_reply(s, s->txn->status, msg)); |
| chn->buf.data = msg->data; |
| memcpy(chn->buf.area, msg->area, msg->data); |
| htx = htx_from_buf(&chn->buf); |
| c_adv(chn, htx->data); |
| chn->total += htx->data; |
| } |
| |
| s->res.wex = tick_add_ifset(now_ms, s->res.wto); |
| channel_auto_read(&s->res); |
| channel_auto_close(&s->res); |
| channel_shutr_now(&s->res); |
| } |
| |
| struct buffer *http_error_message(struct stream *s) |
| { |
| const int msgnum = http_get_status_idx(s->txn->status); |
| |
| if (s->be->errmsg[msgnum].area) |
| return &s->be->errmsg[msgnum]; |
| else if (strm_fe(s)->errmsg[msgnum].area) |
| return &strm_fe(s)->errmsg[msgnum]; |
| else |
| return &http_err_chunks[msgnum]; |
| } |
| |
| /* 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. |
| * Note that connection errors appearing on the second request of a keep-alive |
| * connection are not reported since this allows the client to retry. |
| */ |
| void http_return_srv_error(struct stream *s, struct stream_interface *si) |
| { |
| int err_type = si->err_type; |
| |
| /* set s->txn->status for http_error_message(s) */ |
| s->txn->status = 503; |
| |
| if (err_type & SI_ET_QUEUE_ABRT) |
| http_server_error(s, si, SF_ERR_CLICL, SF_FINST_Q, |
| http_error_message(s)); |
| else if (err_type & SI_ET_CONN_ABRT) |
| http_server_error(s, si, SF_ERR_CLICL, SF_FINST_C, |
| (s->txn->flags & TX_NOT_FIRST) ? NULL : |
| http_error_message(s)); |
| else if (err_type & SI_ET_QUEUE_TO) |
| http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_Q, |
| http_error_message(s)); |
| else if (err_type & SI_ET_QUEUE_ERR) |
| http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_Q, |
| http_error_message(s)); |
| else if (err_type & SI_ET_CONN_TO) |
| http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_C, |
| (s->txn->flags & TX_NOT_FIRST) ? NULL : |
| http_error_message(s)); |
| else if (err_type & SI_ET_CONN_ERR) |
| http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_C, |
| (s->flags & SF_SRV_REUSED) ? NULL : |
| http_error_message(s)); |
| else if (err_type & SI_ET_CONN_RES) |
| http_server_error(s, si, SF_ERR_RESOURCE, SF_FINST_C, |
| (s->txn->flags & TX_NOT_FIRST) ? NULL : |
| http_error_message(s)); |
| else { /* SI_ET_CONN_OTHER and others */ |
| s->txn->status = 500; |
| http_server_error(s, si, SF_ERR_INTERNAL, SF_FINST_C, |
| http_error_message(s)); |
| } |
| } |
| |
| |
| /* Handle Expect: 100-continue for HTTP/1.1 messages if necessary. It returns 0 |
| * on success and -1 on error. |
| */ |
| static int http_handle_expect_hdr(struct stream *s, struct htx *htx, struct http_msg *msg) |
| { |
| /* If we have HTTP/1.1 message with a body and Expect: 100-continue, |
| * then we must send an HTTP/1.1 100 Continue intermediate response. |
| */ |
| if (msg->msg_state == HTTP_MSG_BODY && (msg->flags & HTTP_MSGF_VER_11) && |
| (msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) { |
| struct ist hdr = { .ptr = "Expect", .len = 6 }; |
| struct http_hdr_ctx ctx; |
| |
| ctx.blk = NULL; |
| /* Expect is allowed in 1.1, look for it */ |
| if (http_find_header(htx, hdr, &ctx, 0) && |
| unlikely(isteqi(ctx.value, ist2("100-continue", 12)))) { |
| if (http_reply_100_continue(s) == -1) |
| return -1; |
| http_remove_header(htx, &ctx); |
| } |
| } |
| return 0; |
| } |
| |
| /* Send a 100-Continue response to the client. It returns 0 on success and -1 |
| * on error. The response channel is updated accordingly. |
| */ |
| static int http_reply_100_continue(struct stream *s) |
| { |
| struct channel *res = &s->res; |
| struct htx *htx = htx_from_buf(&res->buf); |
| struct htx_sl *sl; |
| unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11| |
| HTX_SL_F_XFER_LEN|HTX_SL_F_BODYLESS); |
| size_t data; |
| |
| sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, |
| ist("HTTP/1.1"), ist("100"), ist("Continue")); |
| if (!sl) |
| goto fail; |
| sl->info.res.status = 100; |
| |
| if (!htx_add_endof(htx, HTX_BLK_EOH)) |
| goto fail; |
| |
| data = htx->data - co_data(res); |
| c_adv(res, data); |
| res->total += data; |
| return 0; |
| |
| fail: |
| /* If an error occurred, remove the incomplete HTTP response from the |
| * buffer */ |
| channel_htx_truncate(res, htx); |
| return -1; |
| } |
| |
| |
| /* Send a 401-Unauthorized or 407-Unauthorized response to the client, depending |
| * ont whether we use a proxy or not. It returns 0 on success and -1 on |
| * error. The response channel is updated accordingly. |
| */ |
| static int http_reply_40x_unauthorized(struct stream *s, const char *auth_realm) |
| { |
| struct channel *res = &s->res; |
| struct htx *htx = htx_from_buf(&res->buf); |
| struct htx_sl *sl; |
| struct ist code, body; |
| int status; |
| unsigned int flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11); |
| size_t data; |
| |
| if (!(s->txn->flags & TX_USE_PX_CONN)) { |
| status = 401; |
| code = ist("401"); |
| body = ist("<html><body><h1>401 Unauthorized</h1>\n" |
| "You need a valid user and password to access this content.\n" |
| "</body></html>\n"); |
| } |
| else { |
| status = 407; |
| code = ist("407"); |
| body = ist("<html><body><h1>407 Unauthorized</h1>\n" |
| "You need a valid user and password to access this content.\n" |
| "</body></html>\n"); |
| } |
| |
| sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, |
| ist("HTTP/1.1"), code, ist("Unauthorized")); |
| if (!sl) |
| goto fail; |
| sl->info.res.status = status; |
| s->txn->status = status; |
| |
| if (chunk_printf(&trash, "Basic realm=\"%s\"", auth_realm) == -1) |
| goto fail; |
| |
| if (!htx_add_header(htx, ist("Content-length"), ist("112")) || |
| !htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) || |
| !htx_add_header(htx, ist("Connection"), ist("close")) || |
| !htx_add_header(htx, ist("Content-Type"), ist("text/html"))) |
| goto fail; |
| if (status == 401 && !htx_add_header(htx, ist("WWW-Authenticate"), ist2(trash.area, trash.data))) |
| goto fail; |
| if (status == 407 && !htx_add_header(htx, ist("Proxy-Authenticate"), ist2(trash.area, trash.data))) |
| goto fail; |
| if (!htx_add_endof(htx, HTX_BLK_EOH)) |
| goto fail; |
| |
| while (body.len) { |
| size_t sent = htx_add_data(htx, body); |
| if (!sent) |
| goto fail; |
| body.ptr += sent; |
| body.len -= sent; |
| } |
| |
| if (!htx_add_endof(htx, HTX_BLK_EOM)) |
| goto fail; |
| |
| data = htx->data - co_data(res); |
| c_adv(res, data); |
| res->total += data; |
| |
| channel_auto_read(&s->req); |
| channel_abort(&s->req); |
| channel_auto_close(&s->req); |
| channel_htx_erase(&s->req, htxbuf(&s->req.buf)); |
| |
| res->wex = tick_add_ifset(now_ms, res->wto); |
| channel_auto_read(res); |
| channel_auto_close(res); |
| channel_shutr_now(res); |
| return 0; |
| |
| fail: |
| /* If an error occurred, remove the incomplete HTTP response from the |
| * buffer */ |
| channel_htx_truncate(res, htx); |
| return -1; |
| } |
| |
| /* |
| * Capture headers from message <htx> according to header list <cap_hdr>, and |
| * fill the <cap> pointers appropriately. |
| */ |
| static void http_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr) |
| { |
| struct cap_hdr *h; |
| int32_t pos; |
| |
| for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) { |
| struct htx_blk *blk = htx_get_blk(htx, pos); |
| enum htx_blk_type type = htx_get_blk_type(blk); |
| struct ist n, v; |
| |
| if (type == HTX_BLK_EOH) |
| break; |
| if (type != HTX_BLK_HDR) |
| continue; |
| |
| n = htx_get_blk_name(htx, blk); |
| |
| for (h = cap_hdr; h; h = h->next) { |
| if (h->namelen && (h->namelen == n.len) && |
| (strncasecmp(n.ptr, h->name, h->namelen) == 0)) { |
| if (cap[h->index] == NULL) |
| cap[h->index] = |
| pool_alloc(h->pool); |
| |
| if (cap[h->index] == NULL) { |
| ha_alert("HTTP capture : out of memory.\n"); |
| break; |
| } |
| |
| v = htx_get_blk_value(htx, blk); |
| if (v.len > h->len) |
| v.len = h->len; |
| |
| memcpy(cap[h->index], v.ptr, v.len); |
| cap[h->index][v.len]=0; |
| } |
| } |
| } |
| } |
| |
| /* Delete a value in a header between delimiters <from> and <next>. The header |
| * itself is delimited by <start> and <end> pointers. 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 <start>, |
| * 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 <start> ; |
| * - <next> points to a valid delimiter or <end> ; |
| * - there are non-space chars before <from>. |
| */ |
| static int http_del_hdr_value(char *start, char *end, char **from, char *next) |
| { |
| char *prev = *from; |
| |
| if (prev == start) { |
| /* We're removing the first value. eat the semicolon, if <next> |
| * is lower than <end> */ |
| if (next < end) |
| next++; |
| |
| while (next < end && HTTP_IS_SPHT(*next)) |
| next++; |
| } |
| else { |
| /* Remove useless spaces before the old delimiter. */ |
| while (HTTP_IS_SPHT(*(prev-1))) |
| prev--; |
| *from = prev; |
| |
| /* copy the delimiter and if possible a space if we're |
| * not at the end of the line. |
| */ |
| if (next < end) { |
| *prev++ = *next++; |
| if (prev + 1 < next) |
| *prev++ = ' '; |
| while (next < end && HTTP_IS_SPHT(*next)) |
| next++; |
| } |
| } |
| memmove(prev, next, end - next); |
| return (prev - next); |
| } |
| |
| |
| /* Formats the start line of the request (without CRLF) and puts it in <str> and |
| * return the written length. The line can be truncated if it exceeds <len>. |
| */ |
| static size_t http_fmt_req_line(const struct htx_sl *sl, char *str, size_t len) |
| { |
| struct ist dst = ist2(str, 0); |
| |
| if (istcat(&dst, htx_sl_req_meth(sl), len) == -1) |
| goto end; |
| if (dst.len + 1 > len) |
| goto end; |
| dst.ptr[dst.len++] = ' '; |
| |
| if (istcat(&dst, htx_sl_req_uri(sl), len) == -1) |
| goto end; |
| if (dst.len + 1 > len) |
| goto end; |
| dst.ptr[dst.len++] = ' '; |
| |
| istcat(&dst, htx_sl_req_vsn(sl), len); |
| end: |
| return dst.len; |
| } |
| |
| /* |
| * Print a debug line with a start line. |
| */ |
| static void http_debug_stline(const char *dir, struct stream *s, const struct htx_sl *sl) |
| { |
| struct session *sess = strm_sess(s); |
| int max; |
| |
| chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id, |
| dir, |
| objt_conn(sess->origin) ? (unsigned short)objt_conn(sess->origin)->handle.fd : -1, |
| objt_cs(s->si[1].end) ? (unsigned short)objt_cs(s->si[1].end)->conn->handle.fd : -1); |
| |
| max = HTX_SL_P1_LEN(sl); |
| UBOUND(max, trash.size - trash.data - 3); |
| chunk_memcat(&trash, HTX_SL_P1_PTR(sl), max); |
| trash.area[trash.data++] = ' '; |
| |
| max = HTX_SL_P2_LEN(sl); |
| UBOUND(max, trash.size - trash.data - 2); |
| chunk_memcat(&trash, HTX_SL_P2_PTR(sl), max); |
| trash.area[trash.data++] = ' '; |
| |
| max = HTX_SL_P3_LEN(sl); |
| UBOUND(max, trash.size - trash.data - 1); |
| chunk_memcat(&trash, HTX_SL_P3_PTR(sl), max); |
| trash.area[trash.data++] = '\n'; |
| |
| shut_your_big_mouth_gcc(write(1, trash.area, trash.data)); |
| } |
| |
| /* |
| * Print a debug line with a header. |
| */ |
| static void http_debug_hdr(const char *dir, struct stream *s, const struct ist n, const struct ist v) |
| { |
| struct session *sess = strm_sess(s); |
| int max; |
| |
| chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id, |
| dir, |
| objt_conn(sess->origin) ? (unsigned short)objt_conn(sess->origin)->handle.fd : -1, |
| objt_cs(s->si[1].end) ? (unsigned short)objt_cs(s->si[1].end)->conn->handle.fd : -1); |
| |
| max = n.len; |
| UBOUND(max, trash.size - trash.data - 3); |
| chunk_memcat(&trash, n.ptr, max); |
| trash.area[trash.data++] = ':'; |
| trash.area[trash.data++] = ' '; |
| |
| max = v.len; |
| UBOUND(max, trash.size - trash.data - 1); |
| chunk_memcat(&trash, v.ptr, max); |
| trash.area[trash.data++] = '\n'; |
| |
| shut_your_big_mouth_gcc(write(1, trash.area, trash.data)); |
| } |
| |
| /* Allocate a new HTTP transaction for stream <s> unless there is one already. |
| * In case of allocation failure, everything allocated is freed and NULL is |
| * returned. Otherwise the new transaction is assigned to the stream and |
| * returned. |
| */ |
| struct http_txn *http_alloc_txn(struct stream *s) |
| { |
| struct http_txn *txn = s->txn; |
| |
| if (txn) |
| return txn; |
| |
| txn = pool_alloc(pool_head_http_txn); |
| if (!txn) |
| return txn; |
| |
| s->txn = txn; |
| return txn; |
| } |
| |
| void http_txn_reset_req(struct http_txn *txn) |
| { |
| txn->req.flags = 0; |
| txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */ |
| } |
| |
| void http_txn_reset_res(struct http_txn *txn) |
| { |
| txn->rsp.flags = 0; |
| txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */ |
| } |
| |
| /* |
| * Initialize a new HTTP transaction for stream <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 stream *s) |
| { |
| struct http_txn *txn = s->txn; |
| struct conn_stream *cs = objt_cs(s->si[0].end); |
| |
| txn->flags = ((cs && cs->flags & CS_FL_NOT_FIRST) |
| ? (TX_NOT_FIRST|TX_WAIT_NEXT_RQ) |
| : 0); |
| txn->status = -1; |
| *(unsigned int *)txn->cache_hash = 0; |
| |
| txn->cookie_first_date = 0; |
| txn->cookie_last_date = 0; |
| |
| txn->srv_cookie = NULL; |
| txn->cli_cookie = NULL; |
| txn->uri = NULL; |
| |
| http_txn_reset_req(txn); |
| http_txn_reset_res(txn); |
| |
| txn->req.chn = &s->req; |
| txn->rsp.chn = &s->res; |
| |
| txn->auth.method = HTTP_AUTH_UNKNOWN; |
| |
| vars_init(&s->vars_txn, SCOPE_TXN); |
| vars_init(&s->vars_reqres, SCOPE_REQ); |
| } |
| |
| /* to be used at the end of a transaction */ |
| void http_end_txn(struct stream *s) |
| { |
| struct http_txn *txn = s->txn; |
| struct proxy *fe = strm_fe(s); |
| |
| /* these ones will have been dynamically allocated */ |
| pool_free(pool_head_requri, txn->uri); |
| pool_free(pool_head_capture, txn->cli_cookie); |
| pool_free(pool_head_capture, txn->srv_cookie); |
| pool_free(pool_head_uniqueid, s->unique_id); |
| |
| s->unique_id = NULL; |
| txn->uri = NULL; |
| txn->srv_cookie = NULL; |
| txn->cli_cookie = NULL; |
| |
| if (s->req_cap) { |
| struct cap_hdr *h; |
| for (h = fe->req_cap; h; h = h->next) |
| pool_free(h->pool, s->req_cap[h->index]); |
| memset(s->req_cap, 0, fe->nb_req_cap * sizeof(void *)); |
| } |
| |
| if (s->res_cap) { |
| struct cap_hdr *h; |
| for (h = fe->rsp_cap; h; h = h->next) |
| pool_free(h->pool, s->res_cap[h->index]); |
| memset(s->res_cap, 0, fe->nb_rsp_cap * sizeof(void *)); |
| } |
| |
| if (!LIST_ISEMPTY(&s->vars_txn.head)) |
| vars_prune(&s->vars_txn, s->sess, s); |
| if (!LIST_ISEMPTY(&s->vars_reqres.head)) |
| vars_prune(&s->vars_reqres, s->sess, s); |
| } |
| |
| /* to be used at the end of a transaction to prepare a new one */ |
| void http_reset_txn(struct stream *s) |
| { |
| http_end_txn(s); |
| http_init_txn(s); |
| |
| /* reinitialise the current rule list pointer to NULL. We are sure that |
| * any rulelist match the NULL pointer. |
| */ |
| s->current_rule_list = NULL; |
| |
| s->be = strm_fe(s); |
| s->logs.logwait = strm_fe(s)->to_log; |
| s->logs.level = 0; |
| stream_del_srv_conn(s); |
| s->target = NULL; |
| /* re-init store persistence */ |
| s->store_count = 0; |
| s->uniq_id = _HA_ATOMIC_XADD(&global.req_count, 1); |
| |
| s->req.flags |= CF_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 accidently 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(ci_data(&s->res))) |
| b_set_data(&s->res.buf, co_data(&s->res)); |
| |
| /* Now we can realign the response buffer */ |
| c_realign_if_empty(&s->res); |
| |
| s->req.rto = strm_fe(s)->timeout.client; |
| s->req.wto = TICK_ETERNITY; |
| |
| s->res.rto = TICK_ETERNITY; |
| s->res.wto = strm_fe(s)->timeout.client; |
| |
| s->req.rex = TICK_ETERNITY; |
| s->req.wex = TICK_ETERNITY; |
| s->req.analyse_exp = TICK_ETERNITY; |
| s->res.rex = TICK_ETERNITY; |
| s->res.wex = TICK_ETERNITY; |
| s->res.analyse_exp = TICK_ETERNITY; |
| s->si[1].hcto = TICK_ETERNITY; |
| } |
| |
| |
| DECLARE_POOL(pool_head_http_txn, "http_txn", sizeof(struct http_txn)); |
| DECLARE_POOL(pool_head_uniqueid, "uniqueid", UNIQUEID_LEN); |
| |
| __attribute__((constructor)) |
| static void __http_protocol_init(void) |
| { |
| } |
| |
| |
| /* |
| * Local variables: |
| * c-indent-level: 8 |
| * c-basic-offset: 8 |
| * End: |
| */ |