[MAJOR] frontend: split accept() into frontend_accept() and session_accept()
A new function session_accept() is now called from the lower layer to
instanciate a new session. Once the session is instanciated, the upper
layer's frontent_accept() is called. This one can be service-dependant.
That way, we have a 3-phase accept() sequence :
1) protocol-specific, session-less accept(), which is pointed to by
the listener. It defaults to the generic stream_sock_accept().
2) session_accept() which relies on a frontend but not necessarily
for use in a proxy (eg: stats or any future service).
3) frontend_accept() which performs the accept for the service
offerred by the frontend. It defaults to frontend_accept() which
is really what is used by a proxy.
The TCP/HTTP proxies have been moved to this mode so that we can now rely on
frontend_accept() for any type of session initialization relying on a frontend.
The next step will be to convert the stats to use the same system for the stats.
diff --git a/include/proto/frontend.h b/include/proto/frontend.h
index 61e0460..796ebbb 100644
--- a/include/proto/frontend.h
+++ b/include/proto/frontend.h
@@ -26,7 +26,7 @@
#include <types/session.h>
void get_frt_addr(struct session *s);
-int frontend_accept(struct listener *l, int cfd, struct sockaddr_storage *addr);
+int frontend_accept(struct session *s);
#endif /* _PROTO_FRONTEND_H */
diff --git a/include/proto/session.h b/include/proto/session.h
index 737e065..c7a693e 100644
--- a/include/proto/session.h
+++ b/include/proto/session.h
@@ -1,23 +1,23 @@
/*
- include/proto/session.h
- This file defines everything related to sessions.
-
- Copyright (C) 2000-2008 Willy Tarreau - w@1wt.eu
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation, version 2.1
- exclusively.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-*/
+ * include/proto/session.h
+ * This file defines everything related to sessions.
+ *
+ * Copyright (C) 2000-2010 Willy Tarreau - w@1wt.eu
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, version 2.1
+ * exclusively.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
#ifndef _PROTO_SESSION_H
#define _PROTO_SESSION_H
@@ -29,6 +29,7 @@
extern struct pool_head *pool2_session;
extern struct list sessions;
+int session_accept(struct listener *l, int cfd, struct sockaddr_storage *addr);
void session_free(struct session *s);
/* perform minimal intializations, report 0 in case of error, 1 if OK. */
diff --git a/src/cfgparse.c b/src/cfgparse.c
index af27d98..1abb1b7 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -5280,6 +5280,8 @@
}
if (curproxy->cap & PR_CAP_FE) {
+ curproxy->accept = frontend_accept;
+
if (curproxy->tcp_req.inspect_delay ||
!LIST_ISEMPTY(&curproxy->tcp_req.inspect_rules))
curproxy->fe_req_ana |= AN_REQ_INSPECT;
@@ -5351,7 +5353,7 @@
listener->maxconn = curproxy->maxconn;
listener->backlog = curproxy->backlog;
listener->timeout = &curproxy->timeout.client;
- listener->accept = frontend_accept;
+ listener->accept = session_accept;
listener->frontend = curproxy;
listener->handler = process_session;
listener->analysers |= curproxy->fe_req_ana;
diff --git a/src/frontend.c b/src/frontend.c
index 0e4d24f..d467e14 100644
--- a/src/frontend.c
+++ b/src/frontend.c
@@ -53,200 +53,13 @@
s->flags |= SN_FRT_ADDR_SET;
}
-/* This function is called from the protocol layer accept() in order to instanciate
- * a new proxy. It returns a positive value upon success, 0 if the connection needs
- * to be closed and ignored, or a negative value upon critical failure.
+/* Finish a session accept() for a proxy (TCP or HTTP). It returns a negative
+ * value in case of failure, a positive value in case of success, or zero if
+ * it is a success but the session must be closed ASAP.
*/
-int frontend_accept(struct listener *l, int cfd, struct sockaddr_storage *addr)
+int frontend_accept(struct session *s)
{
- struct proxy *p = l->frontend;
- struct session *s;
- struct http_txn *txn;
- struct task *t;
-
- if (unlikely((s = pool_alloc2(pool2_session)) == NULL)) {
- Alert("out of memory in event_accept().\n");
- goto out_close;
- }
-
- /* minimum session initialization required for monitor mode below */
- s->flags = 0;
- s->logs.logwait = p->to_log;
-
- /* if this session comes from a known monitoring system, we want to ignore
- * it as soon as possible, which means closing it immediately for TCP, but
- * cleanly.
- */
- if (unlikely((l->options & LI_O_CHK_MONNET) &&
- addr->ss_family == AF_INET &&
- (((struct sockaddr_in *)addr)->sin_addr.s_addr & p->mon_mask.s_addr) == p->mon_net.s_addr)) {
- if (p->mode == PR_MODE_TCP) {
- pool_free2(pool2_session, s);
- return 0;
- }
- s->flags |= SN_MONITOR;
- s->logs.logwait = 0;
- }
-
- /* OK, we're keeping the session, so let's properly initialize the session */
- LIST_ADDQ(&sessions, &s->list);
- LIST_INIT(&s->back_refs);
-
- if (unlikely((t = task_new()) == NULL)) { /* disable this proxy for a while */
- Alert("out of memory in event_accept().\n");
- goto out_free_session;
- }
-
- s->term_trace = 0;
- s->cli_addr = *addr;
- s->logs.accept_date = date; /* user-visible date for logging */
- s->logs.tv_accept = now; /* corrected date for internal use */
- s->uniq_id = totalconn;
- proxy_inc_fe_ctr(l, p); /* note: cum_beconn will be increased once assigned */
-
- t->process = l->handler;
- t->context = s;
- t->nice = l->nice;
- t->expire = TICK_ETERNITY;
-
- s->task = t;
- s->listener = l;
-
- /* Note: initially, the session's backend points to the frontend.
- * This changes later when switching rules are executed or
- * when the default backend is assigned.
- */
- s->be = s->fe = p;
- s->req = s->rep = NULL; /* will be allocated later */
-
- /* now evaluate the tcp-request layer4 rules. Since we expect to be able
- * to abort right here as soon as possible, we check the rules before
- * even initializing the stream interfaces.
- */
- if ((l->options & LI_O_TCP_RULES) && !tcp_exec_req_rules(s)) {
- task_free(t);
- LIST_DEL(&s->list);
- pool_free2(pool2_session, s);
- /* let's do a no-linger now to close with a single RST. */
- setsockopt(cfd, SOL_SOCKET, SO_LINGER, (struct linger *) &nolinger, sizeof(struct linger));
- return 0;
- }
-
- /* this part should be common with other protocols */
- s->si[0].fd = cfd;
- s->si[0].owner = t;
- s->si[0].state = s->si[0].prev_state = SI_ST_EST;
- s->si[0].err_type = SI_ET_NONE;
- s->si[0].err_loc = NULL;
- s->si[0].connect = NULL;
- s->si[0].iohandler = NULL;
- s->si[0].exp = TICK_ETERNITY;
- s->si[0].flags = SI_FL_NONE;
-
- if (likely(s->fe->options2 & PR_O2_INDEPSTR))
- s->si[0].flags |= SI_FL_INDEP_STR;
-
- if (addr->ss_family == AF_INET || addr->ss_family == AF_INET6)
- s->si[0].flags = SI_FL_CAP_SPLTCP; /* TCP/TCPv6 splicing possible */
-
- /* add the various callbacks */
- stream_sock_prepare_interface(&s->si[0]);
-
- /* pre-initialize the other side's stream interface to an INIT state. The
- * callbacks will be initialized before attempting to connect.
- */
- s->si[1].fd = -1; /* just to help with debugging */
- s->si[1].owner = t;
- s->si[1].state = s->si[1].prev_state = SI_ST_INI;
- s->si[1].err_type = SI_ET_NONE;
- s->si[1].err_loc = NULL;
- s->si[1].connect = NULL;
- s->si[1].iohandler = NULL;
- s->si[1].shutr = stream_int_shutr;
- s->si[1].shutw = stream_int_shutw;
- s->si[1].exp = TICK_ETERNITY;
- s->si[1].flags = SI_FL_NONE;
-
- if (likely(s->fe->options2 & PR_O2_INDEPSTR))
- s->si[1].flags |= SI_FL_INDEP_STR;
-
- s->srv = s->prev_srv = s->srv_conn = NULL;
- s->pend_pos = NULL;
-
- /* init store persistence */
- s->store_count = 0;
-
- /* Adjust some socket options */
- if (unlikely(fcntl(cfd, F_SETFL, O_NONBLOCK) == -1)) {
- Alert("accept(): cannot set the socket in non blocking mode. Giving up\n");
- goto out_free_task;
- }
-
- txn = &s->txn;
- /* Those variables will be checked and freed if non-NULL in
- * session.c:session_free(). It is important that they are
- * properly initialized.
- */
- txn->sessid = NULL;
- txn->srv_cookie = NULL;
- txn->cli_cookie = NULL;
- txn->uri = NULL;
- txn->req.cap = NULL;
- txn->rsp.cap = NULL;
- txn->hdr_idx.v = NULL;
- txn->hdr_idx.size = txn->hdr_idx.used = 0;
-
- if (unlikely((s->req = pool_alloc2(pool2_buffer)) == NULL))
- goto out_free_task; /* no memory */
-
- if (unlikely((s->rep = pool_alloc2(pool2_buffer)) == NULL))
- goto out_free_req; /* no memory */
-
- /* initialize the request buffer */
- s->req->size = global.tune.bufsize;
- buffer_init(s->req);
- s->req->prod = &s->si[0];
- s->req->cons = &s->si[1];
- s->si[0].ib = s->si[1].ob = s->req;
- s->req->flags |= BF_READ_ATTACHED; /* the producer is already connected */
-
- /* activate default analysers enabled for this listener */
- s->req->analysers = l->analysers;
-
- s->req->wto = TICK_ETERNITY;
- s->req->rto = TICK_ETERNITY;
- s->req->rex = TICK_ETERNITY;
- s->req->wex = TICK_ETERNITY;
- s->req->analyse_exp = TICK_ETERNITY;
-
- /* initialize response buffer */
- s->rep->size = global.tune.bufsize;
- buffer_init(s->rep);
- s->rep->prod = &s->si[1];
- s->rep->cons = &s->si[0];
- s->si[0].ob = s->si[1].ib = s->rep;
- s->rep->analysers = 0;
-
- s->rep->rto = TICK_ETERNITY;
- s->rep->wto = TICK_ETERNITY;
- s->rep->rex = TICK_ETERNITY;
- s->rep->wex = TICK_ETERNITY;
- s->rep->analyse_exp = TICK_ETERNITY;
-
- /* finish initialization of the accepted file descriptor */
- fd_insert(cfd);
- fdtab[cfd].owner = &s->si[0];
- fdtab[cfd].state = FD_STREADY;
- fdtab[cfd].flags = 0;
- fdtab[cfd].cb[DIR_RD].f = l->proto->read;
- fdtab[cfd].cb[DIR_RD].b = s->req;
- fdtab[cfd].cb[DIR_WR].f = l->proto->write;
- fdtab[cfd].cb[DIR_WR].b = s->rep;
- fdinfo[cfd].peeraddr = (struct sockaddr *)&s->cli_addr;
- fdinfo[cfd].peerlen = sizeof(s->cli_addr);
- EV_FD_SET(cfd, DIR_RD);
-
- /***************** to be moved to the TCP/HTTP frontend's accept() **************/
+ int cfd = s->si[0].fd;
tv_zero(&s->logs.tv_request);
s->logs.t_queue = -1;
@@ -277,10 +90,10 @@
goto out_delete_cfd;
}
- if (p->options & PR_O_TCP_CLI_KA)
+ if (s->fe->options & PR_O_TCP_CLI_KA)
setsockopt(cfd, SOL_SOCKET, SO_KEEPALIVE, (char *) &one, sizeof(one));
- if (p->options & PR_O_TCP_NOLING)
+ if (s->fe->options & PR_O_TCP_NOLING)
setsockopt(cfd, SOL_SOCKET, SO_LINGER, (struct linger *) &nolinger, sizeof(struct linger));
if (global.tune.client_sndbuf)
@@ -289,34 +102,34 @@
if (global.tune.client_rcvbuf)
setsockopt(cfd, SOL_SOCKET, SO_RCVBUF, &global.tune.client_rcvbuf, sizeof(global.tune.client_rcvbuf));
- if (p->mode == PR_MODE_HTTP) {
+ if (s->fe->mode == PR_MODE_HTTP) {
/* the captures are only used in HTTP frontends */
- if (unlikely(p->nb_req_cap > 0 &&
- (txn->req.cap = pool_alloc2(p->req_cap_pool)) == NULL))
+ if (unlikely(s->fe->nb_req_cap > 0 &&
+ (s->txn.req.cap = pool_alloc2(s->fe->req_cap_pool)) == NULL))
goto out_delete_cfd; /* no memory */
- if (unlikely(p->nb_rsp_cap > 0 &&
- (txn->rsp.cap = pool_alloc2(p->rsp_cap_pool)) == NULL))
+ if (unlikely(s->fe->nb_rsp_cap > 0 &&
+ (s->txn.rsp.cap = pool_alloc2(s->fe->rsp_cap_pool)) == NULL))
goto out_free_reqcap; /* no memory */
}
- if (p->acl_requires & ACL_USE_L7_ANY) {
+ if (s->fe->acl_requires & ACL_USE_L7_ANY) {
/* we have to allocate header indexes only if we know
* that we may make use of them. This of course includes
* (mode == PR_MODE_HTTP).
*/
- txn->hdr_idx.size = MAX_HTTP_HDR;
+ s->txn.hdr_idx.size = MAX_HTTP_HDR;
- if (unlikely((txn->hdr_idx.v = pool_alloc2(p->hdr_idx_pool)) == NULL))
+ if (unlikely((s->txn.hdr_idx.v = pool_alloc2(s->fe->hdr_idx_pool)) == NULL))
goto out_free_rspcap; /* no memory */
/* and now initialize the HTTP transaction state */
http_init_txn(s);
}
- if ((p->mode == PR_MODE_TCP || p->mode == PR_MODE_HTTP)
- && (p->logfac1 >= 0 || p->logfac2 >= 0)) {
- if (likely(p->to_log)) {
+ if ((s->fe->mode == PR_MODE_TCP || s->fe->mode == PR_MODE_HTTP)
+ && (s->fe->logfac1 >= 0 || s->fe->logfac2 >= 0)) {
+ if (likely(s->fe->to_log)) {
/* we have the client ip */
if (s->logs.logwait & LW_CLIP)
if (!(s->logs.logwait &= ~LW_CLIP))
@@ -332,10 +145,10 @@
sn, sizeof(sn)) &&
inet_ntop(AF_INET, (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
pn, sizeof(pn))) {
- send_log(p, LOG_INFO, "Connect from %s:%d to %s:%d (%s/%s)\n",
+ send_log(s->fe, LOG_INFO, "Connect from %s:%d to %s:%d (%s/%s)\n",
pn, ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port),
sn, ntohs(((struct sockaddr_in *)&s->frt_addr)->sin_port),
- p->id, (p->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
+ s->fe->id, (s->fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
}
}
else {
@@ -348,10 +161,10 @@
sn, sizeof(sn)) &&
inet_ntop(AF_INET6, (const void *)&((struct sockaddr_in6 *)&s->cli_addr)->sin6_addr,
pn, sizeof(pn))) {
- send_log(p, LOG_INFO, "Connect from %s:%d to %s:%d (%s/%s)\n",
+ send_log(s->fe, LOG_INFO, "Connect from %s:%d to %s:%d (%s/%s)\n",
pn, ntohs(((struct sockaddr_in6 *)&s->cli_addr)->sin6_port),
sn, ntohs(((struct sockaddr_in6 *)&s->frt_addr)->sin6_port),
- p->id, (p->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
+ s->fe->id, (s->fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
}
}
}
@@ -369,7 +182,7 @@
pn, sizeof(pn));
len = sprintf(trash, "%08x:%s.accept(%04x)=%04x from [%s:%d]\n",
- s->uniq_id, p->id, (unsigned short)l->fd, (unsigned short)cfd,
+ s->uniq_id, s->fe->id, (unsigned short)s->listener->fd, (unsigned short)cfd,
pn, ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port));
}
else {
@@ -379,14 +192,14 @@
pn, sizeof(pn));
len = sprintf(trash, "%08x:%s.accept(%04x)=%04x from [%s:%d]\n",
- s->uniq_id, p->id, (unsigned short)l->fd, (unsigned short)cfd,
+ s->uniq_id, s->fe->id, (unsigned short)s->listener->fd, (unsigned short)cfd,
pn, ntohs(((struct sockaddr_in6 *)(&s->cli_addr))->sin6_port));
}
write(1, trash, len);
}
- if (p->mode == PR_MODE_HTTP)
+ if (s->fe->mode == PR_MODE_HTTP)
s->req->flags |= BF_READ_DONTWAIT; /* one read is usually enough */
/* note: this should not happen anymore since there's always at least the switching rules */
@@ -399,11 +212,11 @@
s->rep->wto = s->fe->timeout.client;
fdtab[cfd].flags = FD_FL_TCP | FD_FL_TCP_NODELAY;
- if (p->options & PR_O_TCP_NOLING)
+ if (s->fe->options & PR_O_TCP_NOLING)
fdtab[cfd].flags |= FD_FL_TCP_NOLING;
- if (unlikely((p->mode == PR_MODE_HTTP && (s->flags & SN_MONITOR)) ||
- (p->mode == PR_MODE_HEALTH && (p->options & PR_O_HTTP_CHK)))) {
+ if (unlikely((s->fe->mode == PR_MODE_HTTP && (s->flags & SN_MONITOR)) ||
+ (s->fe->mode == PR_MODE_HEALTH && (s->fe->options & PR_O_HTTP_CHK)))) {
/* Either we got a request from a monitoring system on an HTTP instance,
* or we're in health check mode with the 'httpchk' option enabled. In
* both cases, we return a fake "HTTP/1.0 200 OK" response and we exit.
@@ -412,44 +225,27 @@
chunk_initstr(&msg, "HTTP/1.0 200 OK\r\n\r\n");
stream_int_retnclose(&s->si[0], &msg); /* forge a 200 response */
s->req->analysers = 0;
- t->expire = s->rep->wex;
+ s->task->expire = s->rep->wex;
EV_FD_CLR(cfd, DIR_RD);
}
- else if (unlikely(p->mode == PR_MODE_HEALTH)) { /* health check mode, no client reading */
+ else if (unlikely(s->fe->mode == PR_MODE_HEALTH)) { /* health check mode, no client reading */
struct chunk msg;
chunk_initstr(&msg, "OK\n");
stream_int_retnclose(&s->si[0], &msg); /* forge an "OK" response */
s->req->analysers = 0;
- t->expire = s->rep->wex;
+ s->task->expire = s->rep->wex;
EV_FD_CLR(cfd, DIR_RD);
}
-
- /**********************************************/
-
- /* it is important not to call the wakeup function directly but to
- * pass through task_wakeup(), because this one knows how to apply
- * priorities to tasks.
- */
- task_wakeup(t, TASK_WOKEN_INIT);
-
+ /* everything's OK, let's go on */
return 1;
/* Error unrolling */
out_free_rspcap:
- pool_free2(p->rsp_cap_pool, txn->rsp.cap);
+ pool_free2(s->fe->rsp_cap_pool, s->txn.rsp.cap);
out_free_reqcap:
- pool_free2(p->req_cap_pool, txn->req.cap);
+ pool_free2(s->fe->req_cap_pool, s->txn.req.cap);
out_delete_cfd:
fd_delete(cfd);
- pool_free2(pool2_buffer, s->rep);
- out_free_req:
- pool_free2(pool2_buffer, s->req);
- out_free_task:
- task_free(t);
- out_free_session:
- LIST_DEL(&s->list);
- pool_free2(pool2_session, s);
- out_close:
return -1;
}
diff --git a/src/session.c b/src/session.c
index 6317442..0ccd995 100644
--- a/src/session.c
+++ b/src/session.c
@@ -1,7 +1,7 @@
/*
- * Server management functions.
+ * Session management functions.
*
- * Copyright 2000-2008 Willy Tarreau <w@1wt.eu>
+ * Copyright 2000-2010 Willy Tarreau <w@1wt.eu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -11,6 +11,8 @@
*/
#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
#include <common/config.h>
#include <common/debug.h>
@@ -42,6 +44,237 @@
struct pool_head *pool2_session;
struct list sessions;
+/* This function is called from the protocol layer accept() in order to instanciate
+ * a new session on behalf of a given listener and frontend. It returns a positive
+ * value upon success, 0 if the connection needs to be closed and ignored, or a
+ * negative value upon critical failure.
+ */
+int session_accept(struct listener *l, int cfd, struct sockaddr_storage *addr)
+{
+ struct proxy *p = l->frontend;
+ struct session *s;
+ struct http_txn *txn;
+ struct task *t;
+
+ if (unlikely((s = pool_alloc2(pool2_session)) == NULL)) {
+ Alert("out of memory in event_accept().\n");
+ goto out_close;
+ }
+
+ /* minimum session initialization required for monitor mode below */
+ s->flags = 0;
+ s->logs.logwait = p->to_log;
+
+ /* if this session comes from a known monitoring system, we want to ignore
+ * it as soon as possible, which means closing it immediately for TCP, but
+ * cleanly.
+ */
+ if (unlikely((l->options & LI_O_CHK_MONNET) &&
+ addr->ss_family == AF_INET &&
+ (((struct sockaddr_in *)addr)->sin_addr.s_addr & p->mon_mask.s_addr) == p->mon_net.s_addr)) {
+ if (p->mode == PR_MODE_TCP) {
+ pool_free2(pool2_session, s);
+ return 0;
+ }
+ s->flags |= SN_MONITOR;
+ s->logs.logwait = 0;
+ }
+
+ /* OK, we're keeping the session, so let's properly initialize the session */
+ LIST_ADDQ(&sessions, &s->list);
+ LIST_INIT(&s->back_refs);
+
+ if (unlikely((t = task_new()) == NULL)) { /* disable this proxy for a while */
+ Alert("out of memory in event_accept().\n");
+ goto out_free_session;
+ }
+
+ s->term_trace = 0;
+ s->cli_addr = *addr;
+ s->logs.accept_date = date; /* user-visible date for logging */
+ s->logs.tv_accept = now; /* corrected date for internal use */
+ s->uniq_id = totalconn;
+ proxy_inc_fe_ctr(l, p); /* note: cum_beconn will be increased once assigned */
+
+ t->process = l->handler;
+ t->context = s;
+ t->nice = l->nice;
+ t->expire = TICK_ETERNITY;
+
+ s->task = t;
+ s->listener = l;
+
+ /* Note: initially, the session's backend points to the frontend.
+ * This changes later when switching rules are executed or
+ * when the default backend is assigned.
+ */
+ s->be = s->fe = p;
+ s->req = s->rep = NULL; /* will be allocated later */
+
+ /* now evaluate the tcp-request layer4 rules. Since we expect to be able
+ * to abort right here as soon as possible, we check the rules before
+ * even initializing the stream interfaces.
+ */
+ if ((l->options & LI_O_TCP_RULES) && !tcp_exec_req_rules(s)) {
+ task_free(t);
+ LIST_DEL(&s->list);
+ pool_free2(pool2_session, s);
+ /* let's do a no-linger now to close with a single RST. */
+ setsockopt(cfd, SOL_SOCKET, SO_LINGER, (struct linger *) &nolinger, sizeof(struct linger));
+ return 0;
+ }
+
+ /* this part should be common with other protocols */
+ s->si[0].fd = cfd;
+ s->si[0].owner = t;
+ s->si[0].state = s->si[0].prev_state = SI_ST_EST;
+ s->si[0].err_type = SI_ET_NONE;
+ s->si[0].err_loc = NULL;
+ s->si[0].connect = NULL;
+ s->si[0].iohandler = NULL;
+ s->si[0].exp = TICK_ETERNITY;
+ s->si[0].flags = SI_FL_NONE;
+
+ if (likely(s->fe->options2 & PR_O2_INDEPSTR))
+ s->si[0].flags |= SI_FL_INDEP_STR;
+
+ if (addr->ss_family == AF_INET || addr->ss_family == AF_INET6)
+ s->si[0].flags = SI_FL_CAP_SPLTCP; /* TCP/TCPv6 splicing possible */
+
+ /* add the various callbacks */
+ stream_sock_prepare_interface(&s->si[0]);
+
+ /* pre-initialize the other side's stream interface to an INIT state. The
+ * callbacks will be initialized before attempting to connect.
+ */
+ s->si[1].fd = -1; /* just to help with debugging */
+ s->si[1].owner = t;
+ s->si[1].state = s->si[1].prev_state = SI_ST_INI;
+ s->si[1].err_type = SI_ET_NONE;
+ s->si[1].err_loc = NULL;
+ s->si[1].connect = NULL;
+ s->si[1].iohandler = NULL;
+ s->si[1].shutr = stream_int_shutr;
+ s->si[1].shutw = stream_int_shutw;
+ s->si[1].exp = TICK_ETERNITY;
+ s->si[1].flags = SI_FL_NONE;
+
+ if (likely(s->fe->options2 & PR_O2_INDEPSTR))
+ s->si[1].flags |= SI_FL_INDEP_STR;
+
+ s->srv = s->prev_srv = s->srv_conn = NULL;
+ s->pend_pos = NULL;
+
+ /* init store persistence */
+ s->store_count = 0;
+
+ /* Adjust some socket options */
+ if (unlikely(fcntl(cfd, F_SETFL, O_NONBLOCK) == -1)) {
+ Alert("accept(): cannot set the socket in non blocking mode. Giving up\n");
+ goto out_free_task;
+ }
+
+ txn = &s->txn;
+ /* Those variables will be checked and freed if non-NULL in
+ * session.c:session_free(). It is important that they are
+ * properly initialized.
+ */
+ txn->sessid = NULL;
+ txn->srv_cookie = NULL;
+ txn->cli_cookie = NULL;
+ txn->uri = NULL;
+ txn->req.cap = NULL;
+ txn->rsp.cap = NULL;
+ txn->hdr_idx.v = NULL;
+ txn->hdr_idx.size = txn->hdr_idx.used = 0;
+
+ if (unlikely((s->req = pool_alloc2(pool2_buffer)) == NULL))
+ goto out_free_task; /* no memory */
+
+ if (unlikely((s->rep = pool_alloc2(pool2_buffer)) == NULL))
+ goto out_free_req; /* no memory */
+
+ /* initialize the request buffer */
+ s->req->size = global.tune.bufsize;
+ buffer_init(s->req);
+ s->req->prod = &s->si[0];
+ s->req->cons = &s->si[1];
+ s->si[0].ib = s->si[1].ob = s->req;
+ s->req->flags |= BF_READ_ATTACHED; /* the producer is already connected */
+
+ /* activate default analysers enabled for this listener */
+ s->req->analysers = l->analysers;
+
+ s->req->wto = TICK_ETERNITY;
+ s->req->rto = TICK_ETERNITY;
+ s->req->rex = TICK_ETERNITY;
+ s->req->wex = TICK_ETERNITY;
+ s->req->analyse_exp = TICK_ETERNITY;
+
+ /* initialize response buffer */
+ s->rep->size = global.tune.bufsize;
+ buffer_init(s->rep);
+ s->rep->prod = &s->si[1];
+ s->rep->cons = &s->si[0];
+ s->si[0].ob = s->si[1].ib = s->rep;
+ s->rep->analysers = 0;
+
+ s->rep->rto = TICK_ETERNITY;
+ s->rep->wto = TICK_ETERNITY;
+ s->rep->rex = TICK_ETERNITY;
+ s->rep->wex = TICK_ETERNITY;
+ s->rep->analyse_exp = TICK_ETERNITY;
+
+ /* finish initialization of the accepted file descriptor */
+ fd_insert(cfd);
+ fdtab[cfd].owner = &s->si[0];
+ fdtab[cfd].state = FD_STREADY;
+ fdtab[cfd].flags = 0;
+ fdtab[cfd].cb[DIR_RD].f = l->proto->read;
+ fdtab[cfd].cb[DIR_RD].b = s->req;
+ fdtab[cfd].cb[DIR_WR].f = l->proto->write;
+ fdtab[cfd].cb[DIR_WR].b = s->rep;
+ fdinfo[cfd].peeraddr = (struct sockaddr *)&s->cli_addr;
+ fdinfo[cfd].peerlen = sizeof(s->cli_addr);
+ EV_FD_SET(cfd, DIR_RD);
+
+ if (p->accept) {
+ int ret = p->accept(s);
+ if (unlikely(ret < 0))
+ goto out_free_rep;
+
+ if (unlikely(ret == 0)) {
+ /* work is finished, we can release everything (eg: monitoring) */
+ pool_free2(pool2_buffer, s->rep);
+ pool_free2(pool2_buffer, s->req);
+ task_free(t);
+ LIST_DEL(&s->list);
+ pool_free2(pool2_session, s);
+ return 0;
+ }
+ }
+
+ /* it is important not to call the wakeup function directly but to
+ * pass through task_wakeup(), because this one knows how to apply
+ * priorities to tasks.
+ */
+ task_wakeup(t, TASK_WOKEN_INIT);
+ return 1;
+
+ /* Error unrolling */
+ out_free_rep:
+ pool_free2(pool2_buffer, s->rep);
+ out_free_req:
+ pool_free2(pool2_buffer, s->req);
+ out_free_task:
+ task_free(t);
+ out_free_session:
+ LIST_DEL(&s->list);
+ pool_free2(pool2_session, s);
+ out_close:
+ return -1;
+}
+
/*
* frees the context associated to a session. It must have been removed first.
*/