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haproxy/src/proxy.c

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/*
* Proxy variables and functions.
*
* Copyright 2000-2009 Willy Tarreau <w@1wt.eu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <common/defaults.h>
#include <common/cfgparse.h>
#include <common/compat.h>
#include <common/config.h>
#include <common/errors.h>
#include <common/memory.h>
#include <common/time.h>
#include <types/global.h>
#include <types/peers.h>
#include <proto/backend.h>
#include <proto/fd.h>
#include <proto/hdr_idx.h>
#include <proto/log.h>
#include <proto/protocols.h>
#include <proto/proto_tcp.h>
#include <proto/proto_http.h>
#include <proto/proxy.h>
#include <proto/signal.h>
#include <proto/task.h>
int listeners; /* # of proxy listeners, set by cfgparse */
struct proxy *proxy = NULL; /* list of all existing proxies */
struct eb_root used_proxy_id = EB_ROOT; /* list of proxy IDs in use */
unsigned int error_snapshot_id = 0; /* global ID assigned to each error then incremented */
/*
* This function returns a string containing a name describing capabilities to
* report comprehensible error messages. Specifically, it will return the words
* "frontend", "backend", "ruleset" when appropriate, or "proxy" for all other
* cases including the proxies declared in "listen" mode.
*/
const char *proxy_cap_str(int cap)
{
if ((cap & PR_CAP_LISTEN) != PR_CAP_LISTEN) {
if (cap & PR_CAP_FE)
return "frontend";
else if (cap & PR_CAP_BE)
return "backend";
else if (cap & PR_CAP_RS)
return "ruleset";
}
return "proxy";
}
/*
* This function returns a string containing the mode of the proxy in a format
* suitable for error messages.
*/
const char *proxy_mode_str(int mode) {
if (mode == PR_MODE_TCP)
return "tcp";
else if (mode == PR_MODE_HTTP)
return "http";
else if (mode == PR_MODE_HEALTH)
return "health";
else
return "unknown";
}
/*
* This function scans the list of backends and servers to retrieve the first
* backend and the first server with the given names, and sets them in both
* parameters. It returns zero if either is not found, or non-zero and sets
* the ones it did not found to NULL. If a NULL pointer is passed for the
* backend, only the pointer to the server will be updated.
*/
int get_backend_server(const char *bk_name, const char *sv_name,
struct proxy **bk, struct server **sv)
{
struct proxy *p;
struct server *s;
int pid, sid;
*sv = NULL;
pid = 0;
if (*bk_name == '#')
pid = atoi(bk_name + 1);
sid = 0;
if (*sv_name == '#')
sid = atoi(sv_name + 1);
for (p = proxy; p; p = p->next)
if ((p->cap & PR_CAP_BE) &&
((pid && p->uuid == pid) ||
(!pid && strcmp(p->id, bk_name) == 0)))
break;
if (bk)
*bk = p;
if (!p)
return 0;
for (s = p->srv; s; s = s->next)
if ((sid && s->puid == sid) ||
(!sid && strcmp(s->id, sv_name) == 0))
break;
*sv = s;
if (!s)
return 0;
return 1;
}
/* This function parses a "timeout" statement in a proxy section. It returns
* -1 if there is any error, 1 for a warning, otherwise zero. If it does not
* return zero, it may write an error message into the <err> buffer, for at
* most <errlen> bytes, trailing zero included. The trailing '\n' must not
* be written. The function must be called with <args> pointing to the first
* command line word, with <proxy> pointing to the proxy being parsed, and
* <defpx> to the default proxy or NULL. As a special case for compatibility
* with older configs, it also accepts "{cli|srv|con}timeout" in args[0].
*/
static int proxy_parse_timeout(char **args, int section, struct proxy *proxy,
struct proxy *defpx, char *err, int errlen)
{
unsigned timeout;
int retval, cap;
const char *res, *name;
int *tv = NULL;
int *td = NULL;
retval = 0;
/* simply skip "timeout" but remain compatible with old form */
if (strcmp(args[0], "timeout") == 0)
args++;
name = args[0];
if (!strcmp(args[0], "client") || !strcmp(args[0], "clitimeout")) {
name = "client";
tv = &proxy->timeout.client;
td = &defpx->timeout.client;
cap = PR_CAP_FE;
} else if (!strcmp(args[0], "tarpit")) {
tv = &proxy->timeout.tarpit;
td = &defpx->timeout.tarpit;
cap = PR_CAP_FE | PR_CAP_BE;
} else if (!strcmp(args[0], "http-keep-alive")) {
tv = &proxy->timeout.httpka;
td = &defpx->timeout.httpka;
cap = PR_CAP_FE | PR_CAP_BE;
} else if (!strcmp(args[0], "http-request")) {
tv = &proxy->timeout.httpreq;
td = &defpx->timeout.httpreq;
cap = PR_CAP_FE | PR_CAP_BE;
} else if (!strcmp(args[0], "server") || !strcmp(args[0], "srvtimeout")) {
name = "server";
tv = &proxy->timeout.server;
td = &defpx->timeout.server;
cap = PR_CAP_BE;
} else if (!strcmp(args[0], "connect") || !strcmp(args[0], "contimeout")) {
name = "connect";
tv = &proxy->timeout.connect;
td = &defpx->timeout.connect;
cap = PR_CAP_BE;
} else if (!strcmp(args[0], "check")) {
tv = &proxy->timeout.check;
td = &defpx->timeout.check;
cap = PR_CAP_BE;
} else if (!strcmp(args[0], "queue")) {
tv = &proxy->timeout.queue;
td = &defpx->timeout.queue;
cap = PR_CAP_BE;
} else {
snprintf(err, errlen,
"timeout '%s': must be 'client', 'server', 'connect', 'check', "
"'queue', 'http-keep-alive', 'http-request' or 'tarpit'",
args[0]);
return -1;
}
if (*args[1] == 0) {
snprintf(err, errlen, "%s timeout expects an integer value (in milliseconds)", name);
return -1;
}
res = parse_time_err(args[1], &timeout, TIME_UNIT_MS);
if (res) {
snprintf(err, errlen, "unexpected character '%c' in %s timeout", *res, name);
return -1;
}
if (!(proxy->cap & cap)) {
snprintf(err, errlen, "%s timeout will be ignored because %s '%s' has no %s capability",
name, proxy_type_str(proxy), proxy->id,
(cap & PR_CAP_BE) ? "backend" : "frontend");
retval = 1;
}
else if (defpx && *tv != *td) {
snprintf(err, errlen, "overwriting %s timeout which was already specified", name);
retval = 1;
}
*tv = MS_TO_TICKS(timeout);
return retval;
}
/* This function parses a "rate-limit" statement in a proxy section. It returns
* -1 if there is any error, 1 for a warning, otherwise zero. If it does not
* return zero, it may write an error message into the <err> buffer, for at
* most <errlen> bytes, trailing zero included. The trailing '\n' must not
* be written. The function must be called with <args> pointing to the first
* command line word, with <proxy> pointing to the proxy being parsed, and
* <defpx> to the default proxy or NULL.
*/
static int proxy_parse_rate_limit(char **args, int section, struct proxy *proxy,
struct proxy *defpx, char *err, int errlen)
{
int retval, cap;
char *res, *name;
unsigned int *tv = NULL;
unsigned int *td = NULL;
unsigned int val;
retval = 0;
/* simply skip "rate-limit" */
if (strcmp(args[0], "rate-limit") == 0)
args++;
name = args[0];
if (!strcmp(args[0], "sessions")) {
name = "sessions";
tv = &proxy->fe_sps_lim;
td = &defpx->fe_sps_lim;
cap = PR_CAP_FE;
} else {
snprintf(err, errlen,
"%s '%s': must be 'sessions'",
"rate-limit", args[0]);
return -1;
}
if (*args[1] == 0) {
snprintf(err, errlen, "%s %s expects expects an integer value (in sessions/second)", "rate-limit", name);
return -1;
}
val = strtoul(args[1], &res, 0);
if (*res) {
snprintf(err, errlen, "%s %s: unexpected character '%c' in integer value '%s'", "rate-limit", name, *res, args[1]);
return -1;
}
if (!(proxy->cap & cap)) {
snprintf(err, errlen, "%s %s will be ignored because %s '%s' has no %s capability",
"rate-limit", name, proxy_type_str(proxy), proxy->id,
(cap & PR_CAP_BE) ? "backend" : "frontend");
retval = 1;
}
else if (defpx && *tv != *td) {
snprintf(err, errlen, "overwriting %s %s which was already specified", "rate-limit", name);
retval = 1;
}
*tv = val;
return retval;
}
/*
* This function finds a proxy with matching name, mode and with satisfying
* capabilities. It also checks if there are more matching proxies with
* requested name as this often leads into unexpected situations.
*/
struct proxy *findproxy_mode(const char *name, int mode, int cap) {
struct proxy *curproxy, *target = NULL;
for (curproxy = proxy; curproxy; curproxy = curproxy->next) {
if ((curproxy->cap & cap)!=cap || strcmp(curproxy->id, name))
continue;
if (curproxy->mode != mode &&
!(curproxy->mode == PR_MODE_HTTP && mode == PR_MODE_TCP)) {
Alert("Unable to use proxy '%s' with wrong mode, required: %s, has: %s.\n",
name, proxy_mode_str(mode), proxy_mode_str(curproxy->mode));
Alert("You may want to use 'mode %s'.\n", proxy_mode_str(mode));
return NULL;
}
if (!target) {
target = curproxy;
continue;
}
Alert("Refusing to use duplicated proxy '%s' with overlapping capabilities: %s/%s!\n",
name, proxy_type_str(curproxy), proxy_type_str(target));
return NULL;
}
return target;
}
/* Returns a pointer to the proxy matching either name <name>, or id <name> if
* <name> begins with a '#'. NULL is returned if no match is found, as well as
* if multiple matches are found (eg: too large capabilities mask).
*/
struct proxy *findproxy(const char *name, int cap) {
struct proxy *curproxy, *target = NULL;
int pid = 0;
if (*name == '#')
pid = atoi(name + 1);
for (curproxy = proxy; curproxy; curproxy = curproxy->next) {
if ((curproxy->cap & cap) != cap ||
(pid && curproxy->uuid != pid) ||
(!pid && strcmp(curproxy->id, name)))
continue;
if (!target) {
target = curproxy;
continue;
}
return NULL;
}
return target;
}
/*
* This function finds a server with matching name within selected proxy.
* It also checks if there are more matching servers with
* requested name as this often leads into unexpected situations.
*/
struct server *findserver(const struct proxy *px, const char *name) {
struct server *cursrv, *target = NULL;
if (!px)
return NULL;
for (cursrv = px->srv; cursrv; cursrv = cursrv->next) {
if (strcmp(cursrv->id, name))
continue;
if (!target) {
target = cursrv;
continue;
}
Alert("Refusing to use duplicated server '%s' fould in proxy: %s!\n",
name, px->id);
return NULL;
}
return target;
}
/* This function checks that the designated proxy has no http directives
* enabled. It will output a warning if there are, and will fix some of them.
* It returns the number of fatal errors encountered. This should be called
* at the end of the configuration parsing if the proxy is not in http mode.
* The <file> argument is used to construct the error message.
*/
int proxy_cfg_ensure_no_http(struct proxy *curproxy)
{
if (curproxy->cookie_name != NULL) {
Warning("config : cookie will be ignored for %s '%s' (needs 'mode http').\n",
proxy_type_str(curproxy), curproxy->id);
}
if (curproxy->rsp_exp != NULL) {
Warning("config : server regular expressions will be ignored for %s '%s' (needs 'mode http').\n",
proxy_type_str(curproxy), curproxy->id);
}
if (curproxy->req_exp != NULL) {
Warning("config : client regular expressions will be ignored for %s '%s' (needs 'mode http').\n",
proxy_type_str(curproxy), curproxy->id);
}
if (curproxy->monitor_uri != NULL) {
Warning("config : monitor-uri will be ignored for %s '%s' (needs 'mode http').\n",
proxy_type_str(curproxy), curproxy->id);
}
if (curproxy->lbprm.algo & BE_LB_NEED_HTTP) {
curproxy->lbprm.algo &= ~BE_LB_ALGO;
curproxy->lbprm.algo |= BE_LB_ALGO_RR;
Warning("config : Layer 7 hash not possible for %s '%s' (needs 'mode http'). Falling back to round robin.\n",
proxy_type_str(curproxy), curproxy->id);
}
if (curproxy->to_log & (LW_REQ | LW_RESP)) {
curproxy->to_log &= ~(LW_REQ | LW_RESP);
Warning("config : 'option httplog' not usable with %s '%s' (needs 'mode http'). Falling back to 'option tcplog'.\n",
proxy_type_str(curproxy), curproxy->id);
}
return 0;
}
/* Perform the most basic initialization of a proxy :
* memset(), list_init(*), reset_timeouts(*).
* Any new proxy should be initialized via this function.
*/
void init_new_proxy(struct proxy *p)
{
memset(p, 0, sizeof(struct proxy));
LIST_INIT(&p->pendconns);
LIST_INIT(&p->acl);
LIST_INIT(&p->http_req_rules);
LIST_INIT(&p->block_cond);
LIST_INIT(&p->redirect_rules);
LIST_INIT(&p->mon_fail_cond);
LIST_INIT(&p->switching_rules);
LIST_INIT(&p->persist_rules);
LIST_INIT(&p->sticking_rules);
LIST_INIT(&p->storersp_rules);
LIST_INIT(&p->tcp_req.inspect_rules);
LIST_INIT(&p->tcp_rep.inspect_rules);
LIST_INIT(&p->tcp_req.l4_rules);
LIST_INIT(&p->req_add);
LIST_INIT(&p->rsp_add);
LIST_INIT(&p->listener_queue);
/* Timeouts are defined as -1 */
proxy_reset_timeouts(p);
p->tcp_rep.inspect_delay = TICK_ETERNITY;
}
/*
* This function creates all proxy sockets. It should be done very early,
* typically before privileges are dropped. The sockets will be registered
* but not added to any fd_set, in order not to loose them across the fork().
* The proxies also start in READY state because they all have their listeners
* bound.
*
* Its return value is composed from ERR_NONE, ERR_RETRYABLE and ERR_FATAL.
* Retryable errors will only be printed if <verbose> is not zero.
*/
int start_proxies(int verbose)
{
struct proxy *curproxy;
struct listener *listener;
int lerr, err = ERR_NONE;
int pxerr;
char msg[100];
for (curproxy = proxy; curproxy != NULL; curproxy = curproxy->next) {
if (curproxy->state != PR_STNEW)
continue; /* already initialized */
pxerr = 0;
for (listener = curproxy->listen; listener != NULL; listener = listener->next) {
if (listener->state != LI_ASSIGNED)
continue; /* already started */
lerr = listener->proto->bind(listener, msg, sizeof(msg));
/* errors are reported if <verbose> is set or if they are fatal */
if (verbose || (lerr & (ERR_FATAL | ERR_ABORT))) {
if (lerr & ERR_ALERT)
Alert("Starting %s %s: %s\n",
proxy_type_str(curproxy), curproxy->id, msg);
else if (lerr & ERR_WARN)
Warning("Starting %s %s: %s\n",
proxy_type_str(curproxy), curproxy->id, msg);
}
err |= lerr;
if (lerr & (ERR_ABORT | ERR_FATAL)) {
pxerr |= 1;
break;
}
else if (lerr & ERR_CODE) {
pxerr |= 1;
continue;
}
}
if (!pxerr) {
curproxy->state = PR_STREADY;
send_log(curproxy, LOG_NOTICE, "Proxy %s started.\n", curproxy->id);
}
if (err & ERR_ABORT)
break;
}
return err;
}
/*
* This is the proxy management task. It enables proxies when there are enough
* free sessions, or stops them when the table is full. It is designed to be
* called as a task which is woken up upon stopping or when rate limiting must
* be enforced.
*/
struct task *manage_proxy(struct task *t)
{
struct proxy *p = t->context;
int next = TICK_ETERNITY;
unsigned int wait;
/* We should periodically try to enable listeners waiting for a
* global resource here.
*/
/* first, let's check if we need to stop the proxy */
if (unlikely(stopping && p->state != PR_STSTOPPED)) {
int t;
t = tick_remain(now_ms, p->stop_time);
if (t == 0) {
Warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
send_log(p, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n",
p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn);
stop_proxy(p);
/* try to free more memory */
pool_gc2();
}
else {
next = tick_first(next, p->stop_time);
}
}
/* the rest below is just for frontends */
if (!(p->cap & PR_CAP_FE))
goto out;
/* check the various reasons we may find to block the frontend */
if (unlikely(p->feconn >= p->maxconn)) {
if (p->state == PR_STREADY)
p->state = PR_STFULL;
goto out;
}
/* OK we have no reason to block, so let's unblock if we were blocking */
if (p->state == PR_STFULL)
p->state = PR_STREADY;
if (p->fe_sps_lim &&
(wait = next_event_delay(&p->fe_sess_per_sec, p->fe_sps_lim, 0))) {
/* we're blocking because a limit was reached on the number of
* requests/s on the frontend. We want to re-check ASAP, which
* means in 1 ms before estimated expiration date, because the
* timer will have settled down.
*/
next = tick_first(next, tick_add(now_ms, wait));
goto out;
}
/* The proxy is not limited so we can re-enable any waiting listener */
if (!LIST_ISEMPTY(&p->listener_queue))
dequeue_all_listeners(&p->listener_queue);
out:
t->expire = next;
task_queue(t);
return t;
}
/*
* this function disables health-check servers so that the process will quickly be ignored
* by load balancers. Note that if a proxy was already in the PAUSED state, then its grace
* time will not be used since it would already not listen anymore to the socket.
*/
void soft_stop(void)
{
struct proxy *p;
struct peers *prs;
stopping = 1;
p = proxy;
tv_update_date(0,1); /* else, the old time before select will be used */
while (p) {
if (p->state != PR_STSTOPPED) {
Warning("Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace);
send_log(p, LOG_WARNING, "Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace);
p->stop_time = tick_add(now_ms, p->grace);
}
if (p->table.size && p->table.sync_task)
task_wakeup(p->table.sync_task, TASK_WOKEN_MSG);
/* wake every proxy task up so that they can handle the stopping */
task_wakeup(p->task, TASK_WOKEN_MSG);
p = p->next;
}
prs = peers;
while (prs) {
stop_proxy((struct proxy *)prs->peers_fe);
prs = prs->next;
}
/* signal zero is used to broadcast the "stopping" event */
signal_handler(0);
}
/* Temporarily disables listening on all of the proxy's listeners. Upon
* success, the proxy enters the PR_PAUSED state. If disabling at least one
* listener returns an error, then the proxy state is set to PR_STERROR
* because we don't know how to resume from this.
*/
void pause_proxy(struct proxy *p)
{
struct listener *l;
for (l = p->listen; l != NULL; l = l->next) {
if (!pause_listener(l))
p->state = PR_STERROR;
}
if (p->state != PR_STERROR)
p->state = PR_STPAUSED;
}
/*
* This function completely stops a proxy and releases its listeners. It has
* to be called when going down in order to release the ports so that another
* process may bind to them. It must also be called on disabled proxies at the
* end of start-up. When all listeners are closed, the proxy is set to the
* PR_STSTOPPED state.
*/
void stop_proxy(struct proxy *p)
{
struct listener *l;
for (l = p->listen; l != NULL; l = l->next) {
unbind_listener(l);
if (l->state >= LI_ASSIGNED) {
delete_listener(l);
listeners--;
jobs--;
}
}
p->state = PR_STSTOPPED;
}
/*
* This function temporarily disables listening so that another new instance
* can start listening. It is designed to be called upon reception of a
* SIGTTOU, after which either a SIGUSR1 can be sent to completely stop
* the proxy, or a SIGTTIN can be sent to listen again.
*/
void pause_proxies(void)
{
int err;
struct proxy *p;
struct peers *prs;
err = 0;
p = proxy;
tv_update_date(0,1); /* else, the old time before select will be used */
while (p) {
if (p->cap & PR_CAP_FE &&
p->state != PR_STERROR &&
p->state != PR_STSTOPPED &&
p->state != PR_STPAUSED) {
Warning("Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
pause_proxy(p);
if (p->state != PR_STPAUSED) {
err |= 1;
Warning("%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
}
}
p = p->next;
}
prs = peers;
while (prs) {
p = prs->peers_fe;
if (p && (p->cap & PR_CAP_FE &&
p->state != PR_STERROR &&
p->state != PR_STSTOPPED &&
p->state != PR_STPAUSED)) {
Warning("Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "Pausing %s %s.\n", proxy_cap_str(p->cap), p->id);
pause_proxy(p);
if (p->state != PR_STPAUSED) {
err |= 1;
Warning("%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id);
}
}
prs = prs->next;
}
if (err) {
Warning("Some proxies refused to pause, performing soft stop now.\n");
send_log(p, LOG_WARNING, "Some proxies refused to pause, performing soft stop now.\n");
soft_stop();
}
}
/*
* This function reactivates listening. This can be used after a call to
* sig_pause(), for example when a new instance has failed starting up.
* It is designed to be called upon reception of a SIGTTIN.
*/
void resume_proxies(void)
{
struct proxy *p;
struct listener *l;
int fail;
p = proxy;
tv_update_date(0,1); /* else, the old time before select will be used */
while (p) {
if (p->state == PR_STPAUSED) {
Warning("Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "Enabling %s %s.\n", proxy_cap_str(p->cap), p->id);
fail = 0;
for (l = p->listen; l != NULL; l = l->next) {
if (!resume_listener(l)) {
int port;
port = get_host_port(&l->addr);
if (port) {
Warning("Port %d busy while trying to enable %s %s.\n",
port, proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "Port %d busy while trying to enable %s %s.\n",
port, proxy_cap_str(p->cap), p->id);
}
else {
Warning("Bind on socket %d busy while trying to enable %s %s.\n",
l->luid, proxy_cap_str(p->cap), p->id);
send_log(p, LOG_WARNING, "Bind on socket %d busy while trying to enable %s %s.\n",
l->luid, proxy_cap_str(p->cap), p->id);
}
/* Another port might have been enabled. Let's stop everything. */
fail = 1;
break;
}
}
p->state = PR_STREADY;
if (fail)
pause_proxy(p);
}
p = p->next;
}
}
/* Set current session's backend to <be>. Nothing is done if the
* session already had a backend assigned, which is indicated by
* s->flags & SN_BE_ASSIGNED.
* All flags, stats and counters which need be updated are updated.
* Returns 1 if done, 0 in case of internal error, eg: lack of resource.
*/
int session_set_backend(struct session *s, struct proxy *be)
{
if (s->flags & SN_BE_ASSIGNED)
return 1;
s->be = be;
be->beconn++;
if (be->beconn > be->be_counters.conn_max)
be->be_counters.conn_max = be->beconn;
proxy_inc_be_ctr(be);
/* assign new parameters to the session from the new backend */
s->si[1].flags &= ~SI_FL_INDEP_STR;
if (be->options2 & PR_O2_INDEPSTR)
s->si[1].flags |= SI_FL_INDEP_STR;
if (be->options2 & PR_O2_RSPBUG_OK)
s->txn.rsp.err_pos = -1; /* let buggy responses pass */
s->flags |= SN_BE_ASSIGNED;
/* If the target backend requires HTTP processing, we have to allocate
* a struct hdr_idx for it if we did not have one.
*/
if (unlikely(!s->txn.hdr_idx.v && (be->acl_requires & ACL_USE_L7_ANY))) {
if ((s->txn.hdr_idx.v = pool_alloc2(s->fe->hdr_idx_pool)) == NULL)
return 0; /* not enough memory */
/* and now initialize the HTTP transaction state */
http_init_txn(s);
s->txn.hdr_idx.size = MAX_HTTP_HDR;
hdr_idx_init(&s->txn.hdr_idx);
}
if (be->options2 & PR_O2_NODELAY) {
s->req->flags |= BF_NEVER_WAIT;
s->rep->flags |= BF_NEVER_WAIT;
}
/* We want to enable the backend-specific analysers except those which
* were already run as part of the frontend/listener. Note that it would
* be more reliable to store the list of analysers that have been run,
* but what we do here is OK for now.
*/
s->req->analysers |= be->be_req_ana & ~(s->listener->analysers);
return 1;
}
static struct cfg_kw_list cfg_kws = {{ },{
{ CFG_LISTEN, "timeout", proxy_parse_timeout },
{ CFG_LISTEN, "clitimeout", proxy_parse_timeout },
{ CFG_LISTEN, "contimeout", proxy_parse_timeout },
{ CFG_LISTEN, "srvtimeout", proxy_parse_timeout },
{ CFG_LISTEN, "rate-limit", proxy_parse_rate_limit },
{ 0, NULL, NULL },
}};
__attribute__((constructor))
static void __proxy_module_init(void)
{
cfg_register_keywords(&cfg_kws);
}
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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