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/*
* Frontend variables and functions.
*
* Copyright 2000-2013 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 <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <netinet/tcp.h>
#include <haproxy/acl.h>
#include <haproxy/api.h>
#include <haproxy/arg.h>
#include <haproxy/chunk.h>
#include <haproxy/connection.h>
#include <haproxy/fd.h>
#include <haproxy/frontend.h>
#include <haproxy/global.h>
#include <haproxy/http_ana.h>
#include <haproxy/log.h>
#include <haproxy/proto_tcp.h>
#include <haproxy/proxy.h>
#include <haproxy/sample.h>
#include <haproxy/sc_strm.h>
#include <haproxy/stream.h>
#include <haproxy/task.h>
#include <haproxy/ticks.h>
#include <haproxy/tools.h>
/* Finish a stream accept() for a proxy (TCP or HTTP). It returns a negative
* value in case of a critical failure which must cause the listener to be
* disabled, a positive or null value in case of success.
*/
int frontend_accept(struct stream *s)
{
const struct sockaddr_storage *src, *dst;
struct session *sess = s->sess;
struct connection *conn = objt_conn(sess->origin);
struct listener *l = sess->listener;
struct proxy *fe = sess->fe;
if ((fe->mode == PR_MODE_TCP || fe->mode == PR_MODE_HTTP)
&& (!LIST_ISEMPTY(&fe->logsrvs))) {
if (likely(!LIST_ISEMPTY(&fe->logformat))) {
/* we have the client ip */
if (s->logs.logwait & LW_CLIP)
if (!(s->logs.logwait &= ~(LW_CLIP|LW_INIT)))
s->do_log(s);
}
else if (conn) {
src = sc_src(s->scf);
if (!src)
send_log(fe, LOG_INFO, "Connect from unknown source to listener %d (%s/%s)\n",
l->luid, fe->id, (fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
else {
char pn[INET6_ADDRSTRLEN], sn[INET6_ADDRSTRLEN];
int port;
switch (addr_to_str(src, pn, sizeof(pn))) {
case AF_INET:
case AF_INET6:
dst = sc_dst(s->scf);
if (dst) {
addr_to_str(dst, sn, sizeof(sn));
port = get_host_port(dst);
} else {
strcpy(sn, "undetermined address");
port = 0;
}
send_log(fe, LOG_INFO, "Connect from %s:%d to %s:%d (%s/%s)\n",
pn, get_host_port(src),
sn, port,
fe->id, (fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
break;
case AF_UNIX:
/* UNIX socket, only the destination is known */
send_log(fe, LOG_INFO, "Connect to unix:%d (%s/%s)\n",
l->luid,
fe->id, (fe->mode == PR_MODE_HTTP) ? "HTTP" : "TCP");
break;
}
}
}
}
if (unlikely((global.mode & MODE_DEBUG) && conn &&
(!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
char pn[INET6_ADDRSTRLEN];
char alpn[16] = "<none>";
const char *alpn_str = NULL;
int alpn_len;
/* try to report the ALPN value when available (also works for NPN) */
if (conn == sc_conn(s->scf)) {
if (conn_get_alpn(conn, &alpn_str, &alpn_len) && alpn_str) {
int len = MIN(alpn_len, sizeof(alpn) - 1);
memcpy(alpn, alpn_str, len);
alpn[len] = 0;
}
}
src = sc_src(s->scf);
if (!src) {
chunk_printf(&trash, "%08x:%s.accept(%04x)=%04x from [listener:%d] ALPN=%s\n",
s->uniq_id, fe->id, (unsigned short)l->rx.fd, (unsigned short)conn->handle.fd,
l->luid, alpn);
}
else switch (addr_to_str(src, pn, sizeof(pn))) {
case AF_INET:
case AF_INET6:
chunk_printf(&trash, "%08x:%s.accept(%04x)=%04x from [%s:%d] ALPN=%s\n",
s->uniq_id, fe->id, (unsigned short)l->rx.fd, (unsigned short)conn->handle.fd,
pn, get_host_port(src), alpn);
break;
case AF_UNIX:
/* UNIX socket, only the destination is known */
chunk_printf(&trash, "%08x:%s.accept(%04x)=%04x from [unix:%d] ALPN=%s\n",
s->uniq_id, fe->id, (unsigned short)l->rx.fd, (unsigned short)conn->handle.fd,
l->luid, alpn);
break;
}
DISGUISE(write(1, trash.area, trash.data));
}
if (fe->mode == PR_MODE_HTTP)
s->req.flags |= CF_READ_DONTWAIT; /* one read is usually enough */
if (unlikely(fe->nb_req_cap > 0)) {
if ((s->req_cap = pool_zalloc(fe->req_cap_pool)) == NULL)
goto out_return; /* no memory */
}
if (unlikely(fe->nb_rsp_cap > 0)) {
if ((s->res_cap = pool_zalloc(fe->rsp_cap_pool)) == NULL)
goto out_free_reqcap; /* no memory */
}
if ((fe->http_needed || IS_HTX_STRM(s)) && !http_create_txn(s))
goto out_free_rspcap;
/* everything's OK, let's go on */
return 1;
/* Error unrolling */
out_free_rspcap:
pool_free(fe->rsp_cap_pool, s->res_cap);
out_free_reqcap:
pool_free(fe->req_cap_pool, s->req_cap);
out_return:
return -1;
}
/************************************************************************/
/* All supported sample and ACL keywords must be declared here. */
/************************************************************************/
/* set temp integer to the id of the frontend */
static int
smp_fetch_fe_id(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
smp->flags = SMP_F_VOL_SESS;
smp->data.type = SMP_T_SINT;
smp->data.u.sint = smp->sess->fe->uuid;
return 1;
}
/* set string to the name of the frontend */
static int
smp_fetch_fe_name(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
smp->data.u.str.area = (char *)smp->sess->fe->id;
if (!smp->data.u.str.area)
return 0;
smp->data.type = SMP_T_STR;
smp->flags = SMP_F_CONST;
smp->data.u.str.data = strlen(smp->data.u.str.area);
return 1;
}
/* set string to the name of the default backend */
static int
smp_fetch_fe_defbe(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
if (!smp->sess->fe->defbe.be)
return 0;
smp->data.u.str.area = (char *)smp->sess->fe->defbe.be->id;
if (!smp->data.u.str.area)
return 0;
smp->data.type = SMP_T_STR;
smp->flags = SMP_F_CONST;
smp->data.u.str.data = strlen(smp->data.u.str.area);
return 1;
}
/* set temp integer to the number of HTTP requests per second reaching the frontend.
* Accepts exactly 1 argument. Argument is a frontend, other types will cause
* an undefined behaviour.
*/
static int
smp_fetch_fe_req_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
struct proxy *px = args->data.prx;
if (px == NULL)
return 0;
if (px->cap & PR_CAP_DEF)
px = smp->px;
smp->flags = SMP_F_VOL_TEST;
smp->data.type = SMP_T_SINT;
smp->data.u.sint = read_freq_ctr(&px->fe_req_per_sec);
return 1;
}
/* set temp integer to the number of connections per second reaching the frontend.
* Accepts exactly 1 argument. Argument is a frontend, other types will cause
* an undefined behaviour.
*/
static int
smp_fetch_fe_sess_rate(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
struct proxy *px = args->data.prx;
if (px == NULL)
return 0;
if (px->cap & PR_CAP_DEF)
px = smp->px;
smp->flags = SMP_F_VOL_TEST;
smp->data.type = SMP_T_SINT;
smp->data.u.sint = read_freq_ctr(&px->fe_sess_per_sec);
return 1;
}
/* set temp integer to the number of concurrent connections on the frontend
* Accepts exactly 1 argument. Argument is a frontend, other types will cause
* an undefined behaviour.
*/
static int
smp_fetch_fe_conn(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
struct proxy *px = args->data.prx;
if (px == NULL)
return 0;
if (px->cap & PR_CAP_DEF)
px = smp->px;
smp->flags = SMP_F_VOL_TEST;
smp->data.type = SMP_T_SINT;
smp->data.u.sint = px->feconn;
return 1;
}
static int
smp_fetch_fe_client_timeout(const struct arg *args, struct sample *smp, const char *km, void *private)
{
smp->flags = SMP_F_VOL_TXN;
smp->data.type = SMP_T_SINT;
smp->data.u.sint = TICKS_TO_MS(smp->sess->fe->timeout.client);
return 1;
}
/* Note: must not be declared <const> as its list will be overwritten.
* Please take care of keeping this list alphabetically sorted.
*/
static struct sample_fetch_kw_list smp_kws = {ILH, {
{ "fe_client_timeout", smp_fetch_fe_client_timeout, 0, NULL, SMP_T_SINT, SMP_USE_FTEND, },
{ "fe_conn", smp_fetch_fe_conn, ARG1(1,FE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
{ "fe_defbe", smp_fetch_fe_defbe, 0, NULL, SMP_T_STR, SMP_USE_FTEND, },
{ "fe_id", smp_fetch_fe_id, 0, NULL, SMP_T_SINT, SMP_USE_FTEND, },
{ "fe_name", smp_fetch_fe_name, 0, NULL, SMP_T_STR, SMP_USE_FTEND, },
{ "fe_req_rate", smp_fetch_fe_req_rate, ARG1(1,FE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
{ "fe_sess_rate", smp_fetch_fe_sess_rate, ARG1(1,FE), NULL, SMP_T_SINT, SMP_USE_INTRN, },
{ /* END */ },
}};
INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws);
/* Note: must not be declared <const> as its list will be overwritten.
* Please take care of keeping this list alphabetically sorted.
*/
static struct acl_kw_list acl_kws = {ILH, {
{ /* END */ },
}};
INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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