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-rw-r--r--src/frontend.c312
1 files changed, 312 insertions, 0 deletions
diff --git a/src/frontend.c b/src/frontend.c
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+++ b/src/frontend.c
@@ -0,0 +1,312 @@
+/*
+ * 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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