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* Frontend variables and functions.
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* Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <netinet/tcp.h>
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#include <common/chunk.h>
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#include <common/compat.h>
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#include <common/config.h>
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#include <common/debug.h>
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#include <common/standard.h>
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#include <common/time.h>
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#include <types/global.h>
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#include <proto/acl.h>
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#include <proto/arg.h>
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#include <proto/channel.h>
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#include <proto/frontend.h>
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#include <proto/log.h>
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#include <proto/hdr_idx.h>
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#include <proto/proto_tcp.h>
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#include <proto/proto_http.h>
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#include <proto/proxy.h>
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#include <proto/sample.h>
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#include <proto/session.h>
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#include <proto/stream_interface.h>
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#include <proto/task.h>
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/* Finish a session accept() for a proxy (TCP or HTTP). It returns a negative
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* value in case of a critical failure which must cause the listener to be
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* disabled, a positive value in case of success, or zero if it is a success
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* but the session must be closed ASAP (eg: monitoring). It only supports
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* sessions with a connection in si[0].
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int frontend_accept(struct session *s)
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struct connection *conn = __objt_conn(s->si[0].end);
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int cfd = conn->t.sock.fd;
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tv_zero(&s->logs.tv_request);
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s->logs.t_connect = -1;
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s->logs.bytes_in = s->logs.bytes_out = 0;
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s->logs.prx_queue_size = 0; /* we get the number of pending conns before us */
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s->logs.srv_queue_size = 0; /* we will get this number soon */
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/* FIXME: the logs are horribly complicated now, because they are
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* defined in <p>, <p>, and later <be> and <be>.
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/* default error reporting function, may be changed by analysers */
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s->srv_error = default_srv_error;
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/* Adjust some socket options */
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if (s->listener->addr.ss_family == AF_INET || s->listener->addr.ss_family == AF_INET6) {
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if (setsockopt(cfd, IPPROTO_TCP, TCP_NODELAY,
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(char *) &one, sizeof(one)) == -1)
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if (s->fe->options & PR_O_TCP_CLI_KA)
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setsockopt(cfd, SOL_SOCKET, SO_KEEPALIVE,
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(char *) &one, sizeof(one));
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if (s->fe->options & PR_O_TCP_NOLING)
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fdtab[cfd].linger_risk = 1;
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#if defined(TCP_MAXSEG)
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if (s->listener->maxseg < 0) {
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/* we just want to reduce the current MSS by that value */
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socklen_t mss_len = sizeof(mss);
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if (getsockopt(cfd, IPPROTO_TCP, TCP_MAXSEG, &mss, &mss_len) == 0) {
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mss += s->listener->maxseg; /* remember, it's < 0 */
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setsockopt(cfd, IPPROTO_TCP, TCP_MAXSEG, &mss, sizeof(mss));
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if (global.tune.client_sndbuf)
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setsockopt(cfd, SOL_SOCKET, SO_SNDBUF, &global.tune.client_sndbuf, sizeof(global.tune.client_sndbuf));
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if (global.tune.client_rcvbuf)
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setsockopt(cfd, SOL_SOCKET, SO_RCVBUF, &global.tune.client_rcvbuf, sizeof(global.tune.client_rcvbuf));
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if (unlikely(s->fe->nb_req_cap > 0 && (s->txn.req.cap = pool_alloc2(s->fe->req_cap_pool)) == NULL))
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goto out_return; /* no memory */
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if (unlikely(s->fe->nb_rsp_cap > 0 && (s->txn.rsp.cap = pool_alloc2(s->fe->rsp_cap_pool)) == NULL))
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goto out_free_reqcap; /* no memory */
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if (s->fe->http_needed) {
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/* we have to allocate header indexes only if we know
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* that we may make use of them. This of course includes
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* (mode == PR_MODE_HTTP).
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s->txn.hdr_idx.size = global.tune.max_http_hdr;
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if (unlikely((s->txn.hdr_idx.v = pool_alloc2(pool2_hdr_idx)) == NULL))
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goto out_free_rspcap; /* no memory */
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/* and now initialize the HTTP transaction state */
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if ((s->fe->mode == PR_MODE_TCP || s->fe->mode == PR_MODE_HTTP)
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&& (!LIST_ISEMPTY(&s->fe->logsrvs))) {
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if (likely(!LIST_ISEMPTY(&s->fe->logformat))) {
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/* we have the client ip */
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if (s->logs.logwait & LW_CLIP)
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if (!(s->logs.logwait &= ~(LW_CLIP|LW_INIT)))
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char pn[INET6_ADDRSTRLEN], sn[INET6_ADDRSTRLEN];
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conn_get_from_addr(conn);
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conn_get_to_addr(conn);
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switch (addr_to_str(&conn->addr.from, pn, sizeof(pn))) {
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addr_to_str(&conn->addr.to, sn, sizeof(sn));
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send_log(s->fe, LOG_INFO, "Connect from %s:%d to %s:%d (%s/%s)\n",
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pn, get_host_port(&conn->addr.from),
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sn, get_host_port(&conn->addr.to),
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s->fe->id, (s->fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
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/* UNIX socket, only the destination is known */
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send_log(s->fe, LOG_INFO, "Connect to unix:%d (%s/%s)\n",
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s->fe->id, (s->fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
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if (unlikely((global.mode & MODE_DEBUG) && (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
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char pn[INET6_ADDRSTRLEN];
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conn_get_from_addr(conn);
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switch (addr_to_str(&conn->addr.from, pn, sizeof(pn))) {
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chunk_printf(&trash, "%08x:%s.accept(%04x)=%04x from [%s:%d]\n",
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s->uniq_id, s->fe->id, (unsigned short)s->listener->fd, (unsigned short)cfd,
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pn, get_host_port(&conn->addr.from));
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/* UNIX socket, only the destination is known */
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chunk_printf(&trash, "%08x:%s.accept(%04x)=%04x from [unix:%d]\n",
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s->uniq_id, s->fe->id, (unsigned short)s->listener->fd, (unsigned short)cfd,
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shut_your_big_mouth_gcc(write(1, trash.str, trash.len));
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if (s->fe->mode == PR_MODE_HTTP)
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s->req->flags |= CF_READ_DONTWAIT; /* one read is usually enough */
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/* note: this should not happen anymore since there's always at least the switching rules */
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if (!s->req->analysers) {
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channel_auto_connect(s->req); /* don't wait to establish connection */
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channel_auto_close(s->req); /* let the producer forward close requests */
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s->req->rto = s->fe->timeout.client;
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s->rep->wto = s->fe->timeout.client;
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/* everything's OK, let's go on */
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/* Error unrolling */
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pool_free2(s->fe->rsp_cap_pool, s->txn.rsp.cap);
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pool_free2(s->fe->req_cap_pool, s->txn.req.cap);
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/************************************************************************/
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/* All supported sample and ACL keywords must be declared here. */
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/************************************************************************/
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/* set temp integer to the id of the frontend */
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smp_fetch_fe_id(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
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const struct arg *args, struct sample *smp, const char *kw)
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smp->flags = SMP_F_VOL_SESS;
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smp->type = SMP_T_UINT;
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smp->data.uint = l4->fe->uuid;
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/* set temp integer to the number of connections per second reaching the frontend.
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* Accepts exactly 1 argument. Argument is a frontend, other types will cause
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* an undefined behaviour.
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smp_fetch_fe_sess_rate(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
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const struct arg *args, struct sample *smp, const char *kw)
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smp->flags = SMP_F_VOL_TEST;
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smp->type = SMP_T_UINT;
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smp->data.uint = read_freq_ctr(&args->data.prx->fe_sess_per_sec);
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/* set temp integer to the number of concurrent connections on the frontend
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* Accepts exactly 1 argument. Argument is a frontend, other types will cause
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* an undefined behaviour.
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smp_fetch_fe_conn(struct proxy *px, struct session *l4, void *l7, unsigned int opt,
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const struct arg *args, struct sample *smp, const char *kw)
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smp->flags = SMP_F_VOL_TEST;
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smp->type = SMP_T_UINT;
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smp->data.uint = args->data.prx->feconn;
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/* Note: must not be declared <const> as its list will be overwritten.
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* Please take care of keeping this list alphabetically sorted.
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static struct sample_fetch_kw_list smp_kws = {ILH, {
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{ "fe_conn", smp_fetch_fe_conn, ARG1(1,FE), NULL, SMP_T_UINT, SMP_USE_INTRN, },
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{ "fe_id", smp_fetch_fe_id, 0, NULL, SMP_T_UINT, SMP_USE_FTEND, },
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{ "fe_sess_rate", smp_fetch_fe_sess_rate, ARG1(1,FE), NULL, SMP_T_UINT, SMP_USE_INTRN, },
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/* Note: must not be declared <const> as its list will be overwritten.
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* Please take care of keeping this list alphabetically sorted.
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static struct acl_kw_list acl_kws = {ILH, {
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__attribute__((constructor))
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static void __frontend_init(void)
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sample_register_fetches(&smp_kws);
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acl_register_keywords(&acl_kws);
added
removed
.pc/from-upstream/0004-BUG-MAJOR-frontend-initialize-capture-pointers-earli.patch/src/frontend.c
