blob: 595092443cb6b8444da6933e8f6b89484d42e1c9 [file] [log] [blame]
/*
* 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/uri_auth.h>
#include <types/cache.h>
#include <types/capture.h>
#include <proto/acl.h>
#include <proto/channel.h>
#include <proto/checks.h>
#include <proto/connection.h>
#include <proto/filters.h>
#include <proto/hdr_idx.h>
#include <proto/http_htx.h>
#include <proto/htx.h>
#include <proto/log.h>
#include <proto/proto_http.h>
#include <proto/proxy.h>
#include <proto/stream.h>
#include <proto/stream_interface.h>
#include <proto/stats.h>
static void htx_end_request(struct stream *s);
static void htx_end_response(struct stream *s);
static void htx_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr);
static size_t htx_fmt_req_line(const union h1_sl sl, char *str, size_t len);
static void htx_debug_stline(const char *dir, struct stream *s, const union h1_sl sl);
static void htx_debug_hdr(const char *dir, struct stream *s, const struct ist n, const struct ist v);
/* 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 htx_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;
union h1_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 = htx_from_buf(&req->buf);
/* 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)
s->logs.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_get_tail_type(htx) < HTX_BLK_EOH)) {
/* 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;
htx_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;
htx_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;
htx_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 */
#ifdef TCP_QUICKACK
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.
*/
setsockopt(__objt_conn(sess->origin)->handle.fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
}
#endif
if ((msg->msg_state != HTTP_MSG_RQBEFORE) && (txn->flags & TX_WAIT_NEXT_RQ)) {
/* If the client starts to talk, let's fall back to
* request timeout processing.
*/
txn->flags &= ~TX_WAIT_NEXT_RQ;
req->analyse_exp = TICK_ETERNITY;
}
/* just set the request timeout once at the beginning of the request */
if (!tick_isset(req->analyse_exp)) {
if ((msg->msg_state == HTTP_MSG_RQBEFORE) &&
(txn->flags & TX_WAIT_NEXT_RQ) &&
tick_isset(s->be->timeout.httpka))
req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka);
else
req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
}
/* we're not ready yet */
return 0;
failed_keep_alive:
/* Here we process low-level errors for keep-alive requests. In
* short, if the request is not the first one and it experiences
* a timeout, read error or shutdown, we just silently close so
* that the client can try again.
*/
txn->status = 0;
msg->msg_state = HTTP_MSG_RQBEFORE;
req->analysers &= AN_REQ_FLT_END;
s->logs.logwait = 0;
s->logs.level = 0;
s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
htx_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;
/* 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;
htx_debug_stline("clireq", s, http_find_stline(htx));
for (pos = htx_get_head(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;
htx_debug_hdr("clihdr", s,
htx_get_blk_name(htx, blk),
htx_get_blk_value(htx, blk));
}
}
/*
* 1: identify the method
*/
sl = http_find_stline(htx);
txn->meth = sl.rq.meth;
msg->flags |= HTTP_MSGF_XFER_LEN;
/* ... and check if the request is HTTP/1.1 or above */
if ((sl.rq.v.len == 8) &&
((*(sl.rq.v.ptr + 5) > '1') ||
((*(sl.rq.v.ptr + 5) == '1') && (*(sl.rq.v.ptr + 7) >= '1'))))
msg->flags |= HTTP_MSGF_VER_11;
/* 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(sl.rq.m, 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(sl.rq.u, 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;
htx_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 normaly */
txn->status = 200;
htx_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 = htx_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) &&
*(sl.rq.u.ptr) != '/' && *(sl.rq.u.ptr) != '*')
txn->flags |= TX_USE_PX_CONN;
/* 5: we may need to capture headers */
if (unlikely((s->logs.logwait & LW_REQHDR) && s->req_cap))
htx_capture_headers(htx, s->req_cap, sess->fe->req_cap);
/* Until set to anything else, the connection mode is set as Keep-Alive. It will
* only change if both the request and the config reference something else.
* Option httpclose by itself sets tunnel mode where headers are mangled.
* However, if another mode is set, it will affect it (eg: server-close/
* keep-alive + httpclose = close). Note that we avoid to redo the same work
* if FE and BE have the same settings (common). The method consists in
* checking if options changed between the two calls (implying that either
* one is non-null, or one of them is non-null and we are there for the first
* time.
*/
if ((sess->fe->options & PR_O_HTTP_MODE) != (s->be->options & PR_O_HTTP_MODE))
htx_adjust_conn_mode(s, txn);
/* 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;
htx_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 htx_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 redirect_rule *rule;
struct cond_wordlist *wl;
enum rule_result verdict;
int deny_status = HTTP_ERR_403;
struct connection *conn = objt_conn(sess->origin);
// TODO: Disabled for now
req->analyse_exp = TICK_ETERNITY;
req->analysers &= ~an_bit;
return 1;
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);
/* just in case we have some per-backend tracking */
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 hdr_ctx ctx;
ctx.idx = 0;
if (!http_find_header2("Early-Data", strlen("Early-Data"),
ci_head(&s->req), &txn->hdr_idx, &ctx)) {
if (unlikely(http_header_add_tail2(&txn->req,
&txn->hdr_idx, "Early-Data: 1",
strlen("Early-Data: 1")) < 0)) {
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 (stats_check_uri(&s->si[1], txn, px)) {
s->target = &http_stats_applet.obj_type;
if (unlikely(!stream_int_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;
}
/* evaluate the req* rules except reqadd */
if (px->req_exp != NULL) {
if (apply_filters_to_request(s, req, px) < 0)
goto return_bad_req;
if (txn->flags & TX_CLDENY)
goto deny;
if (txn->flags & TX_CLTARPIT) {
deny_status = HTTP_ERR_500;
goto tarpit;
}
}
/* add request headers from the rule sets in the same order */
list_for_each_entry(wl, &px->req_add, list) {
if (wl->cond) {
int ret = acl_exec_cond(wl->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
ret = acl_pass(ret);
if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
ret = !ret;
if (!ret)
continue;
}
if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, wl->s, strlen(wl->s)) < 0))
goto return_bad_req;
}
/* Proceed with the stats now. */
if (unlikely(objt_applet(s->target) == &http_stats_applet) ||
unlikely(objt_applet(s->target) == &http_cache_applet)) {
/* process the stats request now */
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 (!(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;
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 (!htx_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)
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_erase(&s->req);
/* 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)
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:
/* We centralize bad requests processing here */
if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
/* we detected a parsing error. We want to archive this request
* in the dedicated proxy area for later troubleshooting.
*/
http_capture_bad_message(sess->fe, s, msg, msg->err_state, sess->fe);
}
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 htx_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 connection *cli_conn = objt_conn(strm_sess(s)->origin);
// TODO: Disabled for now
req->analysers &= ~AN_REQ_FLT_XFER_DATA;
req->analysers |= AN_REQ_HTTP_XFER_BODY;
req->analyse_exp = TICK_ETERNITY;
req->analysers &= ~an_bit;
return 1;
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.
*/
/*
* If HTTP PROXY is set we simply get remote server address parsing
* incoming request. Note that this requires that a connection is
* allocated on the server side.
*/
if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SF_ADDR_SET)) {
struct connection *conn;
char *path;
/* Note that for now we don't reuse existing proxy connections */
if (unlikely((conn = cs_conn(si_alloc_cs(&s->si[1], NULL))) == NULL)) {
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;
}
path = http_txn_get_path(txn);
if (url2sa(ci_head(req) + msg->sl.rq.u,
path ? path - (ci_head(req) + msg->sl.rq.u) : msg->sl.rq.u_l,
&conn->addr.to, NULL) == -1)
goto return_bad_req;
/* if the path was found, we have to remove everything between
* ci_head(req) + msg->sl.rq.u and path (excluded). If it was not
* found, we need to replace from ci_head(req) + msg->sl.rq.u for
* u_l characters by a single "/".
*/
if (path) {
char *cur_ptr = ci_head(req);
char *cur_end = cur_ptr + txn->req.sl.rq.l;
int delta;
delta = b_rep_blk(&req->buf, cur_ptr + msg->sl.rq.u, path, NULL, 0);
http_msg_move_end(&txn->req, delta);
cur_end += delta;
if (http_parse_reqline(&txn->req, HTTP_MSG_RQMETH, cur_ptr, cur_end + 1, NULL, NULL) == NULL)
goto return_bad_req;
}
else {
char *cur_ptr = ci_head(req);
char *cur_end = cur_ptr + txn->req.sl.rq.l;
int delta;
delta = b_rep_blk(&req->buf, cur_ptr + msg->sl.rq.u,
cur_ptr + msg->sl.rq.u + msg->sl.rq.u_l, "/", 1);
http_msg_move_end(&txn->req, delta);
cur_end += delta;
if (http_parse_reqline(&txn->req, HTTP_MSG_RQMETH, cur_ptr, cur_end + 1, NULL, NULL) == NULL)
goto return_bad_req;
}
}
/*
* 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)
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) {
if (chunk_printf(&trash, "%s: %s", sess->fe->header_unique_id, s->unique_id) < 0)
goto return_bad_req;
if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, trash.area, trash.data) < 0))
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 hdr_ctx ctx = { .idx = 0 };
if (!((sess->fe->options | s->be->options) & PR_O_FF_ALWAYS) &&
http_find_header2(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,
ci_head(req), &txn->hdr_idx, &ctx)) {
/* 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 && cli_conn->addr.from.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->addr.from)->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->addr.from)->sin_addr.s_addr & s->be->except_mask.s_addr)
!= s->be->except_net.s_addr)) {
int len;
unsigned char *pn;
pn = (unsigned char *)&((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr;
/* Note: we rely on the backend to get the header name to be used for
* x-forwarded-for, because the header is really meant for the backends.
* However, if the backend did not specify any option, we have to rely
* on the frontend's header name.
*/
if (s->be->fwdfor_hdr_len) {
len = s->be->fwdfor_hdr_len;
memcpy(trash.area,
s->be->fwdfor_hdr_name, len);
} else {
len = sess->fe->fwdfor_hdr_len;
memcpy(trash.area,
sess->fe->fwdfor_hdr_name, len);
}
len += snprintf(trash.area + len,
trash.size - len,
": %d.%d.%d.%d", pn[0], pn[1],
pn[2], pn[3]);
if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, trash.area, len) < 0))
goto return_bad_req;
}
}
else if (cli_conn && cli_conn->addr.from.ss_family == AF_INET6) {
/* FIXME: for the sake of completeness, we should also support
* 'except' here, although it is mostly useless in this case.
*/
int len;
char pn[INET6_ADDRSTRLEN];
inet_ntop(AF_INET6,
(const void *)&((struct sockaddr_in6 *)(&cli_conn->addr.from))->sin6_addr,
pn, sizeof(pn));
/* Note: we rely on the backend to get the header name to be used for
* x-forwarded-for, because the header is really meant for the backends.
* However, if the backend did not specify any option, we have to rely
* on the frontend's header name.
*/
if (s->be->fwdfor_hdr_len) {
len = s->be->fwdfor_hdr_len;
memcpy(trash.area, s->be->fwdfor_hdr_name,
len);
} else {
len = sess->fe->fwdfor_hdr_len;
memcpy(trash.area, sess->fe->fwdfor_hdr_name,
len);
}
len += snprintf(trash.area + len, trash.size - len,
": %s", pn);
if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, trash.area, len) < 0))
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 && cli_conn->addr.from.ss_family == AF_INET) {
/* Add an X-Original-To header unless the destination IP is
* in the 'except' network range.
*/
conn_get_to_addr(cli_conn);
if (cli_conn->addr.to.ss_family == AF_INET &&
((!sess->fe->except_mask_to.s_addr ||
(((struct sockaddr_in *)&cli_conn->addr.to)->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->addr.to)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
!= s->be->except_to.s_addr))) {
int len;
unsigned char *pn;
pn = (unsigned char *)&((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
/* Note: we rely on the backend to get the header name to be used for
* x-original-to, because the header is really meant for the backends.
* However, if the backend did not specify any option, we have to rely
* on the frontend's header name.
*/
if (s->be->orgto_hdr_len) {
len = s->be->orgto_hdr_len;
memcpy(trash.area,
s->be->orgto_hdr_name, len);
} else {
len = sess->fe->orgto_hdr_len;
memcpy(trash.area,
sess->fe->orgto_hdr_name, len);
}
len += snprintf(trash.area + len,
trash.size - len,
": %d.%d.%d.%d", pn[0], pn[1],
pn[2], pn[3]);
if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, trash.area, len) < 0))
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->url_param_name != NULL &&
(msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) {
channel_dont_connect(req);
req->analysers |= AN_REQ_HTTP_BODY;
}
req->analysers &= ~AN_REQ_FLT_XFER_DATA;
req->analysers |= AN_REQ_HTTP_XFER_BODY;
#ifdef TCP_QUICKACK
/* 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) &&
cli_conn && conn_ctrl_ready(cli_conn) &&
((msg->flags & HTTP_MSGF_TE_CHNK) ||
(msg->body_len > ci_data(req) - txn->req.eoh - 2)))
setsockopt(cli_conn->handle.fd, IPPROTO_TCP, TCP_QUICKACK, &one, sizeof(one));
#endif
/*************************************************************
* OK, that's finished for the headers. We have done what we *
* could. Let's switch to the DATA state. *
************************************************************/
req->analyse_exp = TICK_ETERNITY;
req->analysers &= ~an_bit;
s->logs.tv_request = now;
/* OK let's go on with the BODY now */
return 1;
return_bad_req: /* let's centralize all bad requests */
if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
/* we detected a parsing error. We want to archive this request
* in the dedicated proxy area for later troubleshooting.
*/
http_capture_bad_message(sess->fe, s, msg, msg->err_state, sess->fe);
}
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 htx_process_tarpit(struct stream *s, struct channel *req, int an_bit)
{
struct http_txn *txn = s->txn;
// TODO: Disabled for now
req->analyse_exp = TICK_ETERNITY;
req->analysers &= ~an_bit;
return 1;
/* 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 htx_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;
// TODO: Disabled for now
req->analyse_exp = TICK_ETERNITY;
req->analysers &= ~an_bit;
return 1;
/* 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_CHUNK_SIZE) {
/* This is the first call */
if (msg->msg_state < HTTP_MSG_BODY)
goto missing_data;
if (msg->msg_state < HTTP_MSG_100_SENT) {
/* If we have HTTP/1.1 and Expect: 100-continue, then we must
* send an HTTP/1.1 100 Continue intermediate response.
*/
if (msg->flags & HTTP_MSGF_VER_11) {
struct hdr_ctx ctx;
ctx.idx = 0;
/* Expect is allowed in 1.1, look for it */
if (http_find_header2("Expect", 6, ci_head(req), &txn->hdr_idx, &ctx) &&
unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
co_inject(&s->res, HTTP_100.ptr, HTTP_100.len);
http_remove_header2(&txn->req, &txn->hdr_idx, &ctx);
}
}
msg->msg_state = HTTP_MSG_100_SENT;
}
/* we have msg->sov which points to the first byte of message body.
* ci_head(req) still points to the beginning of the message. We
* must save the body in msg->next because it survives buffer
* re-alignments.
*/
msg->next = msg->sov;
if (msg->flags & HTTP_MSGF_TE_CHNK)
msg->msg_state = HTTP_MSG_CHUNK_SIZE;
else
msg->msg_state = HTTP_MSG_DATA;
}
if (!(msg->flags & HTTP_MSGF_TE_CHNK)) {
/* We're in content-length mode, we just have to wait for enough data. */
if (http_body_bytes(msg) < msg->body_len)
goto missing_data;
/* OK we have everything we need now */
goto http_end;
}
/* OK here we're parsing a chunked-encoded message */
if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
/* read the chunk size and assign it to ->chunk_len, then
* set ->sov and ->next to point to the body and switch to DATA or
* TRAILERS state.
*/
unsigned int chunk;
int ret = h1_parse_chunk_size(&req->buf, co_data(req) + msg->next, c_data(req), &chunk);
if (!ret)
goto missing_data;
else if (ret < 0) {
msg->err_pos = ci_data(req) + ret;
if (msg->err_pos < 0)
msg->err_pos += req->buf.size;
stream_inc_http_err_ctr(s);
goto return_bad_req;
}
msg->chunk_len = chunk;
msg->body_len += chunk;
msg->sol = ret;
msg->next += ret;
msg->msg_state = msg->chunk_len ? HTTP_MSG_DATA : HTTP_MSG_TRAILERS;
}
/* Now we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state.
* We have the first data byte is in msg->sov + msg->sol. We're waiting
* for at least a whole chunk or the whole content length bytes after
* msg->sov + msg->sol.
*/
if (msg->msg_state == HTTP_MSG_TRAILERS)
goto http_end;
if (http_body_bytes(msg) >= msg->body_len) /* we have enough bytes now */
goto http_end;
missing_data:
/* we get here if we need to wait for more data. If the buffer is full,
* we have the maximum we can expect.
*/
if (channel_full(req, global.tune.maxrewrite))
goto http_end;
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 htx_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;
//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 = htx_from_buf(&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.
*/
msg->err_state = msg->msg_state;
msg->msg_state = HTTP_MSG_ERROR;
htx_end_request(s);
htx_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;
/* Some post-connect processing might want us to refrain from starting to
* forward data. Currently, the only reason for this is "balance url_param"
* whichs need to parse/process the request after we've enabled forwarding.
*/
if (unlikely(msg->flags & HTTP_MSGF_WAIT_CONN)) {
if (!(s->res.flags & CF_READ_ATTACHED)) {
channel_auto_connect(req);
req->flags |= CF_WAKE_CONNECT;
channel_dont_close(req); /* don't fail on early shutr */
goto waiting;
}
msg->flags &= ~HTTP_MSGF_WAIT_CONN;
}
/* in most states, we should abort in case of early close */
channel_auto_close(req);
if (req->to_forward) {
/* 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 all input data. We get it by removing all outgoing data not
* forwarded yet from HTX data size.
*/
c_adv(req, htx->data - co_data(req));
/* To let the function channel_forward work as expected we must update
* the channel's buffer to pretend there is no more input data. The
* right length is then restored. We must do that, because when an HTX
* message is stored into a buffer, it appears as full.
*/
b_set_data(&req->buf, co_data(req));
if (htx->extra != ULLONG_MAX)
htx->extra -= channel_forward(req, htx->extra);
b_set_data(&req->buf, b_size(&req->buf));
/* Check if the end-of-message is reached and if so, switch the message
* in HTTP_MSG_DONE state.
*/
if (htx_get_tail_type(htx) != HTX_BLK_EOM)
goto missing_data_or_waiting;
msg->msg_state = HTTP_MSG_DONE;
done:
/* other states, DONE...TUNNEL */
/* we don't want to forward closes on DONE except in tunnel mode. */
if ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN)
channel_dont_close(req);
htx_end_request(s);
if (!(req->analysers & an_bit)) {
htx_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 aborted_xfer;
}
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) && !(s->si[0].flags & SI_FL_CLEAN_ABRT)) {
channel_auto_read(req);
if ((req->flags & (CF_SHUTR|CF_READ_NULL)) &&
((txn->flags & TX_CON_WANT_MSK) != 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_DONE && req->flags & CF_SHUTR) {
if (!(s->flags & SF_ERR_MASK))
s->flags |= SF_ERR_CLICL;
if (!(s->flags & SF_FINST_MASK)) {
if (txn->rsp.msg_state < HTTP_MSG_ERROR)
s->flags |= SF_FINST_H;
else
s->flags |= SF_FINST_D;
}
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);
goto return_bad_req_stats_ok;
}
waiting:
/* waiting for the last bits to leave the buffer */
if (req->flags & CF_SHUTW)
goto aborted_xfer;
/* When TE: chunked is used, we need to get there again to parse remaining
* chunks even if the client has closed, so we don't want to set 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);
#if 0 // FIXME [Cf]: Probably not required now, but I need more time to think
// about if
/* 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;
#endif
return 0;
return_bad_req: /* let's centralize all bad requests */
HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
if (sess->listener->counters)
HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
return_bad_req_stats_ok:
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 */
htx_reply_and_close(s, txn->status, NULL);
} else {
txn->status = 400;
htx_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_ERR_MASK))
s->flags |= SF_ERR_PRXCOND;
if (!(s->flags & SF_FINST_MASK)) {
if (txn->rsp.msg_state < HTTP_MSG_ERROR)
s->flags |= SF_FINST_H;
else
s->flags |= SF_FINST_D;
}
return 0;
aborted_xfer:
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 */
htx_reply_and_close(s, txn->status, NULL);
} else {
txn->status = 502;
htx_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 */
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;
if (!(s->flags & SF_FINST_MASK)) {
if (txn->rsp.msg_state < HTTP_MSG_ERROR)
s->flags |= SF_FINST_H;
else
s->flags |= SF_FINST_D;
}
return 0;
}
/* This stream analyser waits for a complete HTTP response. It returns 1 if the
* processing can continue on next analysers, or zero if it either needs more
* data or wants to immediately abort the response (eg: timeout, error, ...). It
* is tied to AN_RES_WAIT_HTTP and may may remove itself from s->res.analysers
* when it has nothing left to do, and may remove any analyser when it wants to
* abort.
*/
int htx_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;
union h1_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 = htx_from_buf(&rep->buf);
/*
* Now we quickly check if we have found a full valid response.
* If not so, we check the FD and buffer states before leaving.
* A full response is indicated by the fact that we have seen
* the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
* responses are checked first.
*
* Depending on whether the client is still there or not, we
* may send an error response back or not. Note that normally
* we should only check for HTTP status there, and check I/O
* errors somewhere else.
*/
if (unlikely(htx_is_empty(htx) || htx_get_tail_type(htx) < HTX_BLK_EOH)) {
/* 1: have we encountered a read error ? */
if (rep->flags & CF_READ_ERROR) {
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 (objt_cs(s->si[1].end)) {
struct connection *conn = objt_cs(s->si[1].end)->conn;
if (conn->err_code == CO_ER_SSL_EARLY_FAILED)
txn->status = 425;
}
s->si[1].flags |= SI_FL_NOLINGER;
htx_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) {
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;
htx_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;
htx_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 (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;
htx_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;
/* 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;
htx_debug_stline("srvrep", s, http_find_stline(htx));
for (pos = htx_get_head(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;
htx_debug_hdr("srvhdr", s,
htx_get_blk_name(htx, blk),
htx_get_blk_value(htx, blk));
}
}
/* 1: get the status code */
sl = http_find_stline(htx);
txn->status = sl.st.status;
if (htx->extra != ULLONG_MAX)
msg->flags |= HTTP_MSGF_XFER_LEN;
/* ... and check if the request is HTTP/1.1 or above */
if ((sl.st.v.len == 8) &&
((*(sl.st.v.ptr + 5) > '1') ||
((*(sl.st.v.ptr + 5) == '1') && (*(sl.st.v.ptr + 7) >= '1'))))
msg->flags |= HTTP_MSGF_VER_11;
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_htx_reset(s, http, htx));
c_adv(rep, htx->data);
msg->msg_state = HTTP_MSG_RPBEFORE;
txn->status = 0;
s->logs.t_data = -1; /* was not a response yet */
return 0;
}
/*
* 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))
htx_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 = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_TUN;
}
/* 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;
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 */
htx_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 htx_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 proxy *cur_proxy;
struct cond_wordlist *wl;
enum rule_result ret = HTTP_RULE_RES_CONT;
// TODO: Disabled for now
rep->analysers &= ~AN_RES_FLT_XFER_DATA;
rep->analysers |= AN_RES_HTTP_XFER_BODY;
rep->analyse_exp = TICK_ETERNITY;
rep->analysers &= ~an_bit;
return 1;
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);
if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
return 0;
/* 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) {
struct proxy *rule_set = cur_proxy;
/* 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;
}
/* try headers filters */
if (rule_set->rsp_exp != NULL) {
if (apply_filters_to_response(s, rep, rule_set) < 0) {
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;
channel_truncate(rep);
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;
}
}
/* 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;
}
/* add response headers from the rule sets in the same order */
list_for_each_entry(wl, &rule_set->rsp_add, list) {
if (txn->status < 200 && txn->status != 101)
break;
if (wl->cond) {
int ret = acl_exec_cond(wl->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
ret = acl_pass(ret);
if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
ret = !ret;
if (!ret)
continue;
}
if (unlikely(http_header_add_tail2(&txn->rsp, &txn->hdr_idx, wl->s, strlen(wl->s)) < 0))
goto return_bad_resp;
}
/* 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))
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))
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,
"Set-Cookie: %s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
s->be->cookie_name);
}
else {
chunk_printf(&trash, "Set-Cookie: %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_header_add_tail2(&txn->rsp, &txn->hdr_idx, trash.area, trash.data) < 0))
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_header_add_tail2(&txn->rsp, &txn->hdr_idx,
"Cache-control: private", 22) < 0))
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 = txn->rsp.eoh;
s->do_log(s);
s->logs.bytes_out = 0;
}
return 1;
}
/* This function is an analyser which forwards response body (including chunk
* sizes if any). It is called as soon as we must forward, even if we forward
* zero byte. The only situation where it must not be called is when we're in
* tunnel mode and we want to forward till the close. It's used both to forward
* remaining data and to resync after end of body. It expects the msg_state to
* be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
* read more data, or 1 once we can go on with next request or end the 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 htx_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 = htx_from_buf(&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;
htx_end_response(s);
htx_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) {
/* 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 all input data. We get it by removing all outgoing data not
* forwarded yet from HTX data size.
*/
c_adv(res, htx->data - co_data(res));
/* To let the function channel_forward work as expected we must update
* the channel's buffer to pretend there is no more input data. The
* right length is then restored. We must do that, because when an HTX
* message is stored into a buffer, it appears as full.
*/
b_set_data(&res->buf, co_data(res));
if (htx->extra != ULLONG_MAX)
htx->extra -= channel_forward(res, htx->extra);
b_set_data(&res->buf, b_size(&res->buf));
if (!(msg->flags & HTTP_MSGF_XFER_LEN)) {
/* The server still sending data that should be filtered */
if (res->flags & CF_SHUTR || !HAS_DATA_FILTERS(s, res)) {
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_DONE state.
*/
if (htx_get_tail_type(htx) != HTX_BLK_EOM)
goto missing_data_or_waiting;
msg->msg_state = HTTP_MSG_DONE;
done:
/* other states, DONE...TUNNEL */
channel_dont_close(res);
htx_end_response(s);
if (!(res->analysers & an_bit)) {
htx_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 aborted_xfer;
}
goto return_bad_res;
}
return 1;
}
return 0;
missing_data_or_waiting:
if (res->flags & CF_SHUTW)
goto aborted_xfer;
/* 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_DONE && res->flags & CF_SHUTR) {
if ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))
goto aborted_xfer;
/* If we have some pending data, we continue the processing */
if (htx_is_empty(htx)) {
if (!(s->flags & SF_ERR_MASK))
s->flags |= SF_ERR_SRVCL;
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);
goto return_bad_res_stats_ok;
}
}
/* 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_DATA_FILTERS(s, res))
channel_dont_close(res);
#if 0 // FIXME [Cf]: Probably not required now, but I need more time to think
// about if
/* 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;
#endif
/* the stream handler will take care of timeouts and errors */
return 0;
return_bad_res: /* let's centralize all bad responses */
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);
return_bad_res_stats_ok:
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 */
htx_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 (objt_server(s->target))
health_adjust(objt_server(s->target), HANA_STATUS_HTTP_HDRRSP);
if (!(s->flags & SF_ERR_MASK))
s->flags |= SF_ERR_PRXCOND;
if (!(s->flags & SF_FINST_MASK))
s->flags |= SF_FINST_D;
return 0;
aborted_xfer:
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 */
htx_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 */
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;
if (!(s->flags & SF_FINST_MASK))
s->flags |= SF_FINST_D;
return 0;
}
void htx_adjust_conn_mode(struct stream *s, struct http_txn *txn)
{
struct proxy *fe = strm_fe(s);
int tmp = TX_CON_WANT_CLO;
if ((fe->options & PR_O_HTTP_MODE) == PR_O_HTTP_TUN)
tmp = TX_CON_WANT_TUN;
if ((txn->flags & TX_CON_WANT_MSK) < tmp)
txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | tmp;
}
/* Perform an HTTP redirect based on the information in <rule>. The function
* returns non-zero on success, or zero in case of a, irrecoverable error such
* as too large a request to build a valid response.
*/
int htx_apply_redirect_rule(struct redirect_rule *rule, struct stream *s, struct http_txn *txn)
{
struct http_msg *req = &txn->req;
struct http_msg *res = &txn->rsp;
const char *msg_fmt;
struct buffer *chunk;
int ret = 0;
chunk = alloc_trash_chunk();
if (!chunk)
goto leave;
/* build redirect message */
switch(rule->code) {
case 308:
msg_fmt = HTTP_308;
break;
case 307:
msg_fmt = HTTP_307;
break;
case 303:
msg_fmt = HTTP_303;
break;
case 301:
msg_fmt = HTTP_301;
break;
case 302:
default:
msg_fmt = HTTP_302;
break;
}
if (unlikely(!chunk_strcpy(chunk, msg_fmt)))
goto leave;
switch(rule->type) {
case REDIRECT_TYPE_SCHEME: {
const char *path;
const char *host;
struct hdr_ctx ctx;
int pathlen;
int hostlen;
host = "";
hostlen = 0;
ctx.idx = 0;
if (http_find_header2("Host", 4, ci_head(req->chn), &txn->hdr_idx, &ctx)) {
host = ctx.line + ctx.val;
hostlen = ctx.vlen;
}
path = http_txn_get_path(txn);
/* build message using path */
if (path) {
pathlen = req->sl.rq.u_l + (ci_head(req->chn) + req->sl.rq.u) - path;
if (rule->flags & REDIRECT_FLAG_DROP_QS) {
int qs = 0;
while (qs < pathlen) {
if (path[qs] == '?') {
pathlen = qs;
break;
}
qs++;
}
}
} else {
path = "/";
pathlen = 1;
}
if (rule->rdr_str) { /* this is an old "redirect" rule */
/* check if we can add scheme + "://" + host + path */
if (chunk->data + rule->rdr_len + 3 + hostlen + pathlen > chunk->size - 4)
goto leave;
/* add scheme */
memcpy(chunk->area + chunk->data, rule->rdr_str,
rule->rdr_len);
chunk->data += rule->rdr_len;
}
else {
/* add scheme with executing log format */
chunk->data += build_logline(s,
chunk->area + chunk->data,
chunk->size - chunk->data,
&rule->rdr_fmt);
/* check if we can add scheme + "://" + host + path */
if (chunk->data + 3 + hostlen + pathlen > chunk->size - 4)
goto leave;
}
/* add "://" */
memcpy(chunk->area + chunk->data, "://", 3);
chunk->data += 3;
/* add host */
memcpy(chunk->area + chunk->data, host, hostlen);
chunk->data += hostlen;
/* add path */
memcpy(chunk->area + chunk->data, path, pathlen);
chunk->data += pathlen;
/* 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 > chunk->size - 5)
goto leave;
chunk->area[chunk->data] = '/';
chunk->data++;
}
break;
}
case REDIRECT_TYPE_PREFIX: {
const char *path;
int pathlen;
path = http_txn_get_path(txn);
/* build message using path */
if (path) {
pathlen = req->sl.rq.u_l + (ci_head(req->chn) + req->sl.rq.u) - path;
if (rule->flags & REDIRECT_FLAG_DROP_QS) {
int qs = 0;
while (qs < pathlen) {
if (path[qs] == '?') {
pathlen = qs;
break;
}
qs++;
}
}
} else {
path = "/";
pathlen = 1;
}
if (rule->rdr_str) { /* this is an old "redirect" rule */
if (chunk->data + rule->rdr_len + pathlen > chunk->size - 4)
goto leave;
/* add prefix. Note that if prefix == "/", we don't want to
* add anything, otherwise it makes it hard for the user to
* configure a self-redirection.
*/
if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
memcpy(chunk->area + chunk->data,
rule->rdr_str, rule->rdr_len);
chunk->data += rule->rdr_len;
}
}
else {
/* add prefix with executing log format */
chunk->data += build_logline(s,
chunk->area + chunk->data,
chunk->size - chunk->data,
&rule->rdr_fmt);
/* Check length */
if (chunk->data + pathlen > chunk->size - 4)
goto leave;
}
/* add path */
memcpy(chunk->area + chunk->data, path, pathlen);
chunk->data += pathlen;
/* 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 > chunk->size - 5)
goto leave;
chunk->area[chunk->data] = '/';
chunk->data++;
}
break;
}
case REDIRECT_TYPE_LOCATION:
default:
if (rule->rdr_str) { /* this is an old "redirect" rule */
if (chunk->data + rule->rdr_len > chunk->size - 4)
goto leave;
/* add location */
memcpy(chunk->area + chunk->data, rule->rdr_str,
rule->rdr_len);
chunk->data += rule->rdr_len;
}
else {
/* add location with executing log format */
chunk->data += build_logline(s,
chunk->area + chunk->data,
chunk->size - chunk->data,
&rule->rdr_fmt);
/* Check left length */
if (chunk->data > chunk->size - 4)
goto leave;
}
break;
}
if (rule->cookie_len) {
memcpy(chunk->area + chunk->data, "\r\nSet-Cookie: ", 14);
chunk->data += 14;
memcpy(chunk->area + chunk->data, rule->cookie_str,
rule->cookie_len);
chunk->data += rule->cookie_len;
}
/* add end of headers and the keep-alive/close status. */
txn->status = rule->code;
/* let's log the request time */
s->logs.tv_request = now;
if (((!(req->flags & HTTP_MSGF_TE_CHNK) && !req->body_len) || (req->msg_state == HTTP_MSG_DONE))) {
/* keep-alive possible */
if (!(req->flags & HTTP_MSGF_VER_11)) {
if (unlikely(txn->flags & TX_USE_PX_CONN)) {
memcpy(chunk->area + chunk->data,
"\r\nProxy-Connection: keep-alive", 30);
chunk->data += 30;
} else {
memcpy(chunk->area + chunk->data,
"\r\nConnection: keep-alive", 24);
chunk->data += 24;
}
}
memcpy(chunk->area + chunk->data, "\r\n\r\n", 4);
chunk->data += 4;
FLT_STRM_CB(s, flt_http_reply(s, txn->status, chunk));
co_inject(res->chn, chunk->area, chunk->data);
/* "eat" the request */
b_del(&req->chn->buf, req->sov);
req->next -= req->sov;
req->sov = 0;
s->req.analysers = AN_REQ_HTTP_XFER_BODY | (s->req.analysers & AN_REQ_FLT_END);
s->res.analysers = AN_RES_HTTP_XFER_BODY | (s->res.analysers & AN_RES_FLT_END);
req->msg_state = HTTP_MSG_CLOSED;
res->msg_state = HTTP_MSG_DONE;
/* Trim any possible response */
b_set_data(&res->chn->buf, co_data(res->chn));
res->next = res->sov = 0;
/* let the server side turn to SI_ST_CLO */
channel_shutw_now(req->chn);
} else {
/* keep-alive not possible */
if (unlikely(txn->flags & TX_USE_PX_CONN)) {
memcpy(chunk->area + chunk->data,
"\r\nProxy-Connection: close\r\n\r\n", 29);
chunk->data += 29;
} else {
memcpy(chunk->area + chunk->data,
"\r\nConnection: close\r\n\r\n", 23);
chunk->data += 23;
}
http_reply_and_close(s, txn->status, chunk);
req->chn->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;
ret = 1;
leave:
free_trash_chunk(chunk);
return ret;
}
/* This function terminates the request because it was completly analyzed or
* because an error was triggered during the body forwarding.
*/
static void htx_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)) {
channel_abort(chn);
channel_truncate(chn);
goto end;
}
if (unlikely(txn->req.msg_state < HTTP_MSG_DONE))
return;
if (txn->req.msg_state == HTTP_MSG_DONE) {
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;
}
/* 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) || (s->si[0].flags & SI_FL_CLEAN_ABRT)) &&
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;
/* When we get here, it means that both the request and the
* response have finished receiving. Depending on the connection
* mode, we'll have to wait for the last bytes to leave in either
* direction, and sometimes for a close to be effective.
*/
if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_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) || (s->si[0].flags & SI_FL_CLEAN_ABRT)))
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 htx_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->rsp.msg_state == HTTP_MSG_ERROR)) {
channel_truncate(chn);
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_MSK) == 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_truncate(chn);
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 htx_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_erase(si_oc(si));
channel_auto_close(si_ic(si));
channel_auto_read(si_ic(si));
if (msg) {
struct channel *chn = si_ic(si);
struct htx *htx;
htx = htx_from_buf(&chn->buf);
htx_add_oob(htx, ist2(msg->area, msg->data));
//FLT_STRM_CB(s, flt_htx_reply(s, s->txn->status, htx));
b_set_data(&chn->buf, b_size(&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 htx_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_erase(&s->req);
channel_truncate(&s->res);
s->txn->flags &= ~TX_WAIT_NEXT_RQ;
if (msg) {
struct channel *chn = &s->res;
struct htx *htx;
htx = htx_from_buf(&chn->buf);
htx_add_oob(htx, ist2(msg->area, msg->data));
//FLT_STRM_CB(s, flt_htx_reply(s, s->txn->status, htx));
b_set_data(&chn->buf, b_size(&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);
}
/*
* Capture headers from message <htx> according to header list <cap_hdr>, and
* fill the <cap> pointers appropriately.
*/
static void htx_capture_headers(struct htx *htx, char **cap, struct cap_hdr *cap_hdr)
{
struct cap_hdr *h;
int32_t pos;
for (pos = htx_get_head(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;
}
}
}
}
/* Formats the start line of the request (without CRLF) and puts it in <str> and
* return the written lenght. The line can be truncated if it exceeds <len>.
*/
static size_t htx_fmt_req_line(const union h1_sl sl, char *str, size_t len)
{
struct ist dst = ist2(str, 0);
if (istcat(&dst, sl.rq.m, len) == -1)
goto end;
if (dst.len + 1 > len)
goto end;
dst.ptr[dst.len++] = ' ';
if (istcat(&dst, sl.rq.u, len) == -1)
goto end;
if (dst.len + 1 > len)
goto end;
dst.ptr[dst.len++] = ' ';
istcat(&dst, sl.rq.v, len);
end:
return dst.len;
}
/*
* Print a debug line with a start line.
*/
static void htx_debug_stline(const char *dir, struct stream *s, const union h1_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 = sl.rq.m.len;
UBOUND(max, trash.size - trash.data - 3);
chunk_memcat(&trash, sl.rq.m.ptr, max);
trash.area[trash.data++] = ' ';
max = sl.rq.u.len;
UBOUND(max, trash.size - trash.data - 2);
chunk_memcat(&trash, sl.rq.u.ptr, max);
trash.area[trash.data++] = ' ';
max = sl.rq.v.len;
UBOUND(max, trash.size - trash.data - 1);
chunk_memcat(&trash, sl.rq.v.ptr, 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 htx_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));
}
__attribute__((constructor))
static void __htx_protocol_init(void)
{
}
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/