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Willy Tarreaub1ec8c42015-04-03 13:53:24 +02001/*
Willy Tarreau9903f0e2015-04-04 18:50:31 +02002 * Session management functions.
Willy Tarreaub1ec8c42015-04-03 13:53:24 +02003 *
Willy Tarreau9903f0e2015-04-04 18:50:31 +02004 * Copyright 2000-2015 Willy Tarreau <w@1wt.eu>
Willy Tarreaub1ec8c42015-04-03 13:53:24 +02005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
Willy Tarreau4c7e4b72020-05-27 12:58:42 +020013#include <haproxy/api.h>
Willy Tarreau7ea393d2020-06-04 18:02:10 +020014#include <haproxy/connection.h>
Willy Tarreauf268ee82020-06-04 17:05:57 +020015#include <haproxy/global.h>
Willy Tarreaucd72d8c2020-06-02 19:11:26 +020016#include <haproxy/http.h>
Willy Tarreau213e9902020-06-04 14:58:24 +020017#include <haproxy/listener.h>
Willy Tarreauaeed4a82020-06-04 22:01:04 +020018#include <haproxy/log.h>
Willy Tarreaud0ef4392020-06-02 09:38:52 +020019#include <haproxy/pool.h>
Willy Tarreaua264d962020-06-04 22:29:18 +020020#include <haproxy/proxy.h>
Willy Tarreau48d25b32020-06-04 18:58:52 +020021#include <haproxy/session.h>
Willy Tarreau8b550af2020-06-04 17:42:48 +020022#include <haproxy/tcp_rules.h>
Willy Tarreaua1718922020-06-04 16:25:31 +020023#include <haproxy/vars.h>
Willy Tarreaub1ec8c42015-04-03 13:53:24 +020024
Willy Tarreaubb2ef122015-04-04 16:31:16 +020025
Willy Tarreau8ceae722018-11-26 11:58:30 +010026DECLARE_POOL(pool_head_session, "session", sizeof(struct session));
Olivier Houchard351411f2018-12-27 17:20:54 +010027DECLARE_POOL(pool_head_sess_srv_list, "session server list",
28 sizeof(struct sess_srv_list));
Willy Tarreaub1ec8c42015-04-03 13:53:24 +020029
Olivier Houchard477902b2020-01-22 18:08:48 +010030int conn_complete_session(struct connection *conn);
Olivier Houchard9f6af332018-05-25 14:04:04 +020031static struct task *session_expire_embryonic(struct task *t, void *context, unsigned short state);
Willy Tarreau9903f0e2015-04-04 18:50:31 +020032
Willy Tarreauc38f71c2015-04-05 00:38:48 +020033/* Create a a new session and assign it to frontend <fe>, listener <li>,
34 * origin <origin>, set the current date and clear the stick counters pointers.
35 * Returns the session upon success or NULL. The session may be released using
Willy Tarreau0bf6fa52017-09-15 10:25:14 +020036 * session_free(). Note: <li> may be NULL.
Willy Tarreauc38f71c2015-04-05 00:38:48 +020037 */
38struct session *session_new(struct proxy *fe, struct listener *li, enum obj_type *origin)
39{
40 struct session *sess;
41
Willy Tarreaubafbe012017-11-24 17:34:44 +010042 sess = pool_alloc(pool_head_session);
Willy Tarreauc38f71c2015-04-05 00:38:48 +020043 if (sess) {
44 sess->listener = li;
45 sess->fe = fe;
46 sess->origin = origin;
47 sess->accept_date = date; /* user-visible date for logging */
48 sess->tv_accept = now; /* corrected date for internal use */
49 memset(sess->stkctr, 0, sizeof(sess->stkctr));
Willy Tarreauebcd4842015-06-19 11:59:02 +020050 vars_init(&sess->vars, SCOPE_SESS);
Willy Tarreau0b74eae2017-08-28 19:02:51 +020051 sess->task = NULL;
Willy Tarreau590a0512018-09-05 11:56:48 +020052 sess->t_handshake = -1; /* handshake not done yet */
Olivier Houchardd5b3d302019-03-08 18:54:34 +010053 _HA_ATOMIC_ADD(&totalconn, 1);
54 _HA_ATOMIC_ADD(&jobs, 1);
Olivier Houchard351411f2018-12-27 17:20:54 +010055 LIST_INIT(&sess->srv_list);
Olivier Houcharda2dbeb22018-12-28 18:50:57 +010056 sess->idle_conns = 0;
Olivier Houchard250031e2019-05-29 15:01:50 +020057 sess->flags = SESS_FL_NONE;
Willy Tarreauc38f71c2015-04-05 00:38:48 +020058 }
59 return sess;
60}
61
Willy Tarreau11c36242015-04-04 15:54:03 +020062void session_free(struct session *sess)
63{
Olivier Houchard00cf70f2018-11-30 17:24:55 +010064 struct connection *conn, *conn_back;
Olivier Houchard351411f2018-12-27 17:20:54 +010065 struct sess_srv_list *srv_list, *srv_list_back;
Olivier Houchard7c6f8b12018-11-13 16:48:36 +010066
Willy Tarreau4f0c64c2017-10-18 15:01:14 +020067 if (sess->listener)
68 listener_release(sess->listener);
Willy Tarreaubb2ef122015-04-04 16:31:16 +020069 session_store_counters(sess);
Willy Tarreauebcd4842015-06-19 11:59:02 +020070 vars_prune_per_sess(&sess->vars);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +010071 conn = objt_conn(sess->origin);
72 if (conn != NULL && conn->mux)
Christopher Faulet73c12072019-04-08 11:23:22 +020073 conn->mux->destroy(conn->ctx);
Olivier Houchard351411f2018-12-27 17:20:54 +010074 list_for_each_entry_safe(srv_list, srv_list_back, &sess->srv_list, srv_list) {
75 list_for_each_entry_safe(conn, conn_back, &srv_list->conn_list, session_list) {
Willy Tarreau5de78172019-11-15 07:04:24 +010076 LIST_DEL_INIT(&conn->session_list);
Olivier Houchard00cf70f2018-11-30 17:24:55 +010077 if (conn->mux) {
Olivier Houchard00cf70f2018-11-30 17:24:55 +010078 conn->owner = NULL;
Olivier Houchard8788b412019-01-31 19:31:19 +010079 conn->flags &= ~CO_FL_SESS_IDLE;
Olivier Houchard2444aa52020-01-20 13:56:01 +010080 conn->mux->destroy(conn->ctx);
Olivier Houchard00cf70f2018-11-30 17:24:55 +010081 } else {
82 /* We have a connection, but not yet an associated mux.
83 * So destroy it now.
84 */
85 conn_stop_tracking(conn);
86 conn_full_close(conn);
87 conn_free(conn);
88 }
89 }
Olivier Houchard351411f2018-12-27 17:20:54 +010090 pool_free(pool_head_sess_srv_list, srv_list);
Olivier Houchard201b9f42018-11-21 00:16:29 +010091 }
Willy Tarreaubafbe012017-11-24 17:34:44 +010092 pool_free(pool_head_session, sess);
Olivier Houchardd5b3d302019-03-08 18:54:34 +010093 _HA_ATOMIC_SUB(&jobs, 1);
Willy Tarreau11c36242015-04-04 15:54:03 +020094}
95
Willy Tarreau3e13cba2017-10-08 11:26:30 +020096/* callback used from the connection/mux layer to notify that a connection is
Joseph Herlantd091bfb2018-11-25 11:22:10 -080097 * going to be released.
Willy Tarreau3e13cba2017-10-08 11:26:30 +020098 */
99void conn_session_free(struct connection *conn)
100{
101 session_free(conn->owner);
102}
103
Willy Tarreau042cd752015-04-08 18:10:49 +0200104/* count a new session to keep frontend, listener and track stats up to date */
105static void session_count_new(struct session *sess)
106{
107 struct stkctr *stkctr;
108 void *ptr;
109 int i;
110
111 proxy_inc_fe_sess_ctr(sess->listener, sess->fe);
112
113 for (i = 0; i < MAX_SESS_STKCTR; i++) {
114 stkctr = &sess->stkctr[i];
115 if (!stkctr_entry(stkctr))
116 continue;
117
118 ptr = stktable_data_ptr(stkctr->table, stkctr_entry(stkctr), STKTABLE_DT_SESS_CNT);
119 if (ptr)
120 stktable_data_cast(ptr, sess_cnt)++;
121
122 ptr = stktable_data_ptr(stkctr->table, stkctr_entry(stkctr), STKTABLE_DT_SESS_RATE);
123 if (ptr)
124 update_freq_ctr_period(&stktable_data_cast(ptr, sess_rate),
125 stkctr->table->data_arg[STKTABLE_DT_SESS_RATE].u, 1);
126 }
127}
128
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200129/* This function is called from the protocol layer accept() in order to
Dave Chiluk8618a6a2018-06-21 11:03:20 -0500130 * instantiate a new session on behalf of a given listener and frontend. It
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200131 * returns a positive value upon success, 0 if the connection can be ignored,
132 * or a negative value upon critical failure. The accepted file descriptor is
133 * closed if we return <= 0. If no handshake is needed, it immediately tries
Dave Chiluk8618a6a2018-06-21 11:03:20 -0500134 * to instantiate a new stream. The created connection's owner points to the
Willy Tarreau0b74eae2017-08-28 19:02:51 +0200135 * new session until the upper layers are created.
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200136 */
137int session_accept_fd(struct listener *l, int cfd, struct sockaddr_storage *addr)
138{
139 struct connection *cli_conn;
Willy Tarreauc95bad52016-12-22 00:13:31 +0100140 struct proxy *p = l->bind_conf->frontend;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200141 struct session *sess;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200142 int ret;
143
144
145 ret = -1; /* assume unrecoverable error by default */
146
Christopher Faulet236c93b2020-07-02 09:19:54 +0200147 if (unlikely((cli_conn = conn_new(&l->obj_type)) == NULL))
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200148 goto out_close;
149
Willy Tarreauca79f592019-07-17 19:04:47 +0200150 if (!sockaddr_alloc(&cli_conn->src))
151 goto out_free_conn;
152
Willy Tarreau585744b2017-08-24 14:31:19 +0200153 cli_conn->handle.fd = cfd;
Willy Tarreau4d3c60a2019-07-17 15:23:20 +0200154 *cli_conn->src = *addr;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200155 cli_conn->flags |= CO_FL_ADDR_FROM_SET;
Willy Tarreau818a92e2020-09-03 07:50:19 +0200156 cli_conn->proxy_netns = l->rx.settings->netns;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200157
Willy Tarreaub7436612020-08-28 19:51:44 +0200158 conn_prepare(cli_conn, l->rx.proto, l->bind_conf->xprt);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200159 conn_ctrl_init(cli_conn);
160
161 /* wait for a PROXY protocol header */
Olivier Houchardfe50bfb2019-05-27 12:09:19 +0200162 if (l->options & LI_O_ACC_PROXY)
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200163 cli_conn->flags |= CO_FL_ACCEPT_PROXY;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200164
Bertrand Jacquin93b227d2016-06-04 15:11:10 +0100165 /* wait for a NetScaler client IP insertion protocol header */
Olivier Houchardfe50bfb2019-05-27 12:09:19 +0200166 if (l->options & LI_O_ACC_CIP)
Bertrand Jacquin93b227d2016-06-04 15:11:10 +0100167 cli_conn->flags |= CO_FL_ACCEPT_CIP;
Bertrand Jacquin93b227d2016-06-04 15:11:10 +0100168
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200169 if (conn_xprt_init(cli_conn) < 0)
170 goto out_free_conn;
171
Olivier Houchardfe50bfb2019-05-27 12:09:19 +0200172 /* Add the handshake pseudo-XPRT */
173 if (cli_conn->flags & (CO_FL_ACCEPT_PROXY | CO_FL_ACCEPT_CIP)) {
174 if (xprt_add_hs(cli_conn) != 0)
175 goto out_free_conn;
176 }
Willy Tarreau64beab22015-04-05 00:39:16 +0200177 sess = session_new(p, l, &cli_conn->obj_type);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200178 if (!sess)
179 goto out_free_conn;
180
Willy Tarreau436d3332017-10-08 11:16:46 +0200181 conn_set_owner(cli_conn, sess, NULL);
Willy Tarreau0b74eae2017-08-28 19:02:51 +0200182
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200183 /* now evaluate the tcp-request layer4 rules. We only need a session
184 * and no stream for these rules.
185 */
Willy Tarreau7d9736f2016-10-21 16:34:21 +0200186 if ((l->options & LI_O_TCP_L4_RULES) && !tcp_exec_l4_rules(sess)) {
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200187 /* let's do a no-linger now to close with a single RST. */
188 setsockopt(cfd, SOL_SOCKET, SO_LINGER, (struct linger *) &nolinger, sizeof(struct linger));
189 ret = 0; /* successful termination */
190 goto out_free_sess;
191 }
192
193 /* monitor-net and health mode are processed immediately after TCP
194 * connection rules. This way it's possible to block them, but they
195 * never use the lower data layers, they send directly over the socket,
196 * as they were designed for. We first flush the socket receive buffer
197 * in order to avoid emission of an RST by the system. We ignore any
198 * error.
199 */
200 if (unlikely((p->mode == PR_MODE_HEALTH) ||
201 ((l->options & LI_O_CHK_MONNET) &&
202 addr->ss_family == AF_INET &&
203 (((struct sockaddr_in *)addr)->sin_addr.s_addr & p->mon_mask.s_addr) == p->mon_net.s_addr))) {
204 /* we have 4 possibilities here :
205 * - HTTP mode, from monitoring address => send "HTTP/1.0 200 OK"
206 * - HEALTH mode with HTTP check => send "HTTP/1.0 200 OK"
207 * - HEALTH mode without HTTP check => just send "OK"
208 * - TCP mode from monitoring address => just close
209 */
Willy Tarreaub7436612020-08-28 19:51:44 +0200210 if (l->rx.proto->drain)
211 l->rx.proto->drain(cfd);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200212 if (p->mode == PR_MODE_HTTP ||
Christopher Faulete5870d82020-04-15 11:32:03 +0200213 (p->mode == PR_MODE_HEALTH && (p->options2 & PR_O2_CHK_ANY) == PR_O2_TCPCHK_CHK &&
214 (p->tcpcheck_rules.flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_HTTP_CHK))
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200215 send(cfd, "HTTP/1.0 200 OK\r\n\r\n", 19, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_MORE);
216 else if (p->mode == PR_MODE_HEALTH)
217 send(cfd, "OK\n", 3, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_MORE);
218 ret = 0;
219 goto out_free_sess;
220 }
221
Willy Tarreauf9d1bc62015-04-05 17:56:47 +0200222 /* Adjust some socket options */
Willy Tarreau37159062020-08-27 07:48:42 +0200223 if (l->rx.addr.ss_family == AF_INET || l->rx.addr.ss_family == AF_INET6) {
Willy Tarreauf9d1bc62015-04-05 17:56:47 +0200224 setsockopt(cfd, IPPROTO_TCP, TCP_NODELAY, (char *) &one, sizeof(one));
225
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900226 if (p->options & PR_O_TCP_CLI_KA) {
Willy Tarreauf9d1bc62015-04-05 17:56:47 +0200227 setsockopt(cfd, SOL_SOCKET, SO_KEEPALIVE, (char *) &one, sizeof(one));
228
Willy Tarreau52543212020-07-09 05:58:51 +0200229#ifdef TCP_KEEPCNT
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900230 if (p->clitcpka_cnt)
231 setsockopt(cfd, IPPROTO_TCP, TCP_KEEPCNT, &p->clitcpka_cnt, sizeof(p->clitcpka_cnt));
Willy Tarreau52543212020-07-09 05:58:51 +0200232#endif
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900233
Willy Tarreau52543212020-07-09 05:58:51 +0200234#ifdef TCP_KEEPIDLE
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900235 if (p->clitcpka_idle)
236 setsockopt(cfd, IPPROTO_TCP, TCP_KEEPIDLE, &p->clitcpka_idle, sizeof(p->clitcpka_idle));
Willy Tarreau52543212020-07-09 05:58:51 +0200237#endif
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900238
Willy Tarreau52543212020-07-09 05:58:51 +0200239#ifdef TCP_KEEPINTVL
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900240 if (p->clitcpka_intvl)
241 setsockopt(cfd, IPPROTO_TCP, TCP_KEEPINTVL, &p->clitcpka_intvl, sizeof(p->clitcpka_intvl));
Willy Tarreau52543212020-07-09 05:58:51 +0200242#endif
MIZUTA Takeshib24bc0d2020-07-09 11:13:20 +0900243 }
244
Willy Tarreauf9d1bc62015-04-05 17:56:47 +0200245 if (p->options & PR_O_TCP_NOLING)
246 fdtab[cfd].linger_risk = 1;
247
248#if defined(TCP_MAXSEG)
249 if (l->maxseg < 0) {
250 /* we just want to reduce the current MSS by that value */
251 int mss;
252 socklen_t mss_len = sizeof(mss);
253 if (getsockopt(cfd, IPPROTO_TCP, TCP_MAXSEG, &mss, &mss_len) == 0) {
254 mss += l->maxseg; /* remember, it's < 0 */
255 setsockopt(cfd, IPPROTO_TCP, TCP_MAXSEG, &mss, sizeof(mss));
256 }
257 }
258#endif
259 }
260
261 if (global.tune.client_sndbuf)
262 setsockopt(cfd, SOL_SOCKET, SO_SNDBUF, &global.tune.client_sndbuf, sizeof(global.tune.client_sndbuf));
263
264 if (global.tune.client_rcvbuf)
265 setsockopt(cfd, SOL_SOCKET, SO_RCVBUF, &global.tune.client_rcvbuf, sizeof(global.tune.client_rcvbuf));
266
Willy Tarreau0b74eae2017-08-28 19:02:51 +0200267 /* OK, now either we have a pending handshake to execute with and then
268 * we must return to the I/O layer, or we can proceed with the end of
269 * the stream initialization. In case of handshake, we also set the I/O
270 * timeout to the frontend's client timeout and register a task in the
271 * session for this purpose. The connection's owner is left to the
272 * session during this period.
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200273 *
274 * At this point we set the relation between sess/task/conn this way :
275 *
Willy Tarreau0b74eae2017-08-28 19:02:51 +0200276 * +----------------- task
277 * | |
278 * orig -- sess <-- context |
279 * | ^ | |
280 * v | | |
281 * conn -- owner ---> task <-----+
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200282 */
Willy Tarreau911db9b2020-01-23 16:27:54 +0100283 if (cli_conn->flags & (CO_FL_WAIT_XPRT | CO_FL_EARLY_SSL_HS)) {
Emeric Brunc60def82017-09-27 14:59:38 +0200284 if (unlikely((sess->task = task_new(tid_bit)) == NULL))
Willy Tarreau87787ac2017-08-28 16:22:54 +0200285 goto out_free_sess;
286
Willy Tarreau0b74eae2017-08-28 19:02:51 +0200287 sess->task->context = sess;
288 sess->task->nice = l->nice;
289 sess->task->process = session_expire_embryonic;
290 sess->task->expire = tick_add_ifset(now_ms, p->timeout.client);
291 task_queue(sess->task);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200292 return 1;
293 }
294
Willy Tarreau18b95a42015-04-05 01:04:01 +0200295 /* OK let's complete stream initialization since there is no handshake */
Willy Tarreau0c4ed352017-09-15 10:06:28 +0200296 if (conn_complete_session(cli_conn) >= 0)
297 return 1;
Willy Tarreaud1769b82015-04-06 00:25:48 +0200298
Willy Tarreaue5891ca2020-01-07 18:03:09 +0100299 /* if we reach here we have deliberately decided not to keep this
300 * session (e.g. tcp-request rule), so that's not an error we should
301 * try to protect against.
302 */
303 ret = 0;
304
Willy Tarreau0c4ed352017-09-15 10:06:28 +0200305 /* error unrolling */
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200306 out_free_sess:
Christopher Fauletfe234282018-03-23 15:11:55 +0100307 /* prevent call to listener_release during session_free. It will be
308 * done below, for all errors. */
309 sess->listener = NULL;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200310 session_free(sess);
311 out_free_conn:
Willy Tarreau5b78a9d2017-10-05 18:12:51 +0200312 conn_stop_tracking(cli_conn);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200313 conn_xprt_close(cli_conn);
314 conn_free(cli_conn);
315 out_close:
Christopher Fauletfe234282018-03-23 15:11:55 +0100316 listener_release(l);
Christopher Faulet76f4c372019-07-17 16:53:19 +0200317 if (ret < 0 && l->bind_conf->xprt == xprt_get(XPRT_RAW) &&
318 p->mode == PR_MODE_HTTP && l->bind_conf->mux_proto == NULL) {
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200319 /* critical error, no more memory, try to emit a 500 response */
Christopher Faulet39566d12019-07-17 21:36:33 +0200320 send(cfd, http_err_msgs[HTTP_ERR_500], strlen(http_err_msgs[HTTP_ERR_500]),
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200321 MSG_DONTWAIT|MSG_NOSIGNAL);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200322 }
323
324 if (fdtab[cfd].owner)
325 fd_delete(cfd);
326 else
327 close(cfd);
328 return ret;
329}
330
331
332/* prepare the trash with a log prefix for session <sess>. It only works with
333 * embryonic sessions based on a real connection. This function requires that
334 * at sess->origin points to the incoming connection.
335 */
336static void session_prepare_log_prefix(struct session *sess)
337{
338 struct tm tm;
339 char pn[INET6_ADDRSTRLEN];
340 int ret;
341 char *end;
342 struct connection *cli_conn = __objt_conn(sess->origin);
343
Willy Tarreau4d3c60a2019-07-17 15:23:20 +0200344 ret = conn_get_src(cli_conn) ? addr_to_str(cli_conn->src, pn, sizeof(pn)) : 0;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200345 if (ret <= 0)
346 chunk_printf(&trash, "unknown [");
347 else if (ret == AF_UNIX)
348 chunk_printf(&trash, "%s:%d [", pn, sess->listener->luid);
349 else
Willy Tarreau4d3c60a2019-07-17 15:23:20 +0200350 chunk_printf(&trash, "%s:%d [", pn, get_host_port(cli_conn->src));
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200351
352 get_localtime(sess->accept_date.tv_sec, &tm);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200353 end = date2str_log(trash.area + trash.data, &tm, &(sess->accept_date),
354 trash.size - trash.data);
355 trash.data = end - trash.area;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200356 if (sess->listener->name)
357 chunk_appendf(&trash, "] %s/%s", sess->fe->id, sess->listener->name);
358 else
359 chunk_appendf(&trash, "] %s/%d", sess->fe->id, sess->listener->luid);
360}
361
362/* This function kills an existing embryonic session. It stops the connection's
363 * transport layer, releases assigned resources, resumes the listener if it was
364 * disabled and finally kills the file descriptor. This function requires that
365 * sess->origin points to the incoming connection.
366 */
Willy Tarreau086735a2018-11-05 15:09:47 +0100367static void session_kill_embryonic(struct session *sess, unsigned short state)
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200368{
369 int level = LOG_INFO;
370 struct connection *conn = __objt_conn(sess->origin);
Willy Tarreau0b74eae2017-08-28 19:02:51 +0200371 struct task *task = sess->task;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200372 unsigned int log = sess->fe->to_log;
373 const char *err_msg;
374
375 if (sess->fe->options2 & PR_O2_LOGERRORS)
376 level = LOG_ERR;
377
378 if (log && (sess->fe->options & PR_O_NULLNOLOG)) {
379 /* with "option dontlognull", we don't log connections with no transfer */
380 if (!conn->err_code ||
381 conn->err_code == CO_ER_PRX_EMPTY || conn->err_code == CO_ER_PRX_ABORT ||
Bertrand Jacquin93b227d2016-06-04 15:11:10 +0100382 conn->err_code == CO_ER_CIP_EMPTY || conn->err_code == CO_ER_CIP_ABORT ||
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200383 conn->err_code == CO_ER_SSL_EMPTY || conn->err_code == CO_ER_SSL_ABORT)
384 log = 0;
385 }
386
387 if (log) {
Willy Tarreau086735a2018-11-05 15:09:47 +0100388 if (!conn->err_code && (state & TASK_WOKEN_TIMER)) {
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200389 if (conn->flags & CO_FL_ACCEPT_PROXY)
390 conn->err_code = CO_ER_PRX_TIMEOUT;
Bertrand Jacquin93b227d2016-06-04 15:11:10 +0100391 else if (conn->flags & CO_FL_ACCEPT_CIP)
392 conn->err_code = CO_ER_CIP_TIMEOUT;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200393 else if (conn->flags & CO_FL_SSL_WAIT_HS)
394 conn->err_code = CO_ER_SSL_TIMEOUT;
395 }
396
397 session_prepare_log_prefix(sess);
398 err_msg = conn_err_code_str(conn);
399 if (err_msg)
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200400 send_log(sess->fe, level, "%s: %s\n", trash.area,
401 err_msg);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200402 else
403 send_log(sess->fe, level, "%s: unknown connection error (code=%d flags=%08x)\n",
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200404 trash.area, conn->err_code, conn->flags);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200405 }
406
407 /* kill the connection now */
Willy Tarreau5b78a9d2017-10-05 18:12:51 +0200408 conn_stop_tracking(conn);
409 conn_full_close(conn);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200410 conn_free(conn);
Olivier Houchard7c6f8b12018-11-13 16:48:36 +0100411 sess->origin = NULL;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200412
Olivier Houchard3f795f72019-04-17 22:51:06 +0200413 task_destroy(task);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200414 session_free(sess);
415}
416
417/* Manages the embryonic session timeout. It is only called when the timeout
418 * strikes and performs the required cleanup.
419 */
Olivier Houchard9f6af332018-05-25 14:04:04 +0200420static struct task *session_expire_embryonic(struct task *t, void *context, unsigned short state)
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200421{
Olivier Houchard9f6af332018-05-25 14:04:04 +0200422 struct session *sess = context;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200423
Olivier Houchardfde2a092018-08-16 19:03:50 +0200424 if (!(state & TASK_WOKEN_TIMER))
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200425 return t;
426
Willy Tarreau086735a2018-11-05 15:09:47 +0100427 session_kill_embryonic(sess, state);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200428 return NULL;
429}
430
431/* Finish initializing a session from a connection, or kills it if the
Willy Tarreau0c4ed352017-09-15 10:06:28 +0200432 * connection shows and error. Returns <0 if the connection was killed. It may
Olivier Houchard477902b2020-01-22 18:08:48 +0100433 * be called either asynchronously when ssl handshake is done with an embryonic
Willy Tarreau0c4ed352017-09-15 10:06:28 +0200434 * session, or synchronously to finalize the session. The distinction is made
435 * on sess->task which is only set in the embryonic session case.
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200436 */
Olivier Houchard477902b2020-01-22 18:08:48 +0100437int conn_complete_session(struct connection *conn)
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200438{
Willy Tarreau0b74eae2017-08-28 19:02:51 +0200439 struct session *sess = conn->owner;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200440
Willy Tarreau590a0512018-09-05 11:56:48 +0200441 sess->t_handshake = tv_ms_elapsed(&sess->tv_accept, &now);
442
Willy Tarreaud1769b82015-04-06 00:25:48 +0200443 if (conn->flags & CO_FL_ERROR)
444 goto fail;
445
Willy Tarreau678be622015-04-08 18:18:15 +0200446 /* if logs require transport layer information, note it on the connection */
447 if (sess->fe->to_log & LW_XPRT)
448 conn->flags |= CO_FL_XPRT_TRACKED;
449
Willy Tarreau620408f2016-10-21 16:37:51 +0200450 /* we may have some tcp-request-session rules */
451 if ((sess->listener->options & LI_O_TCP_L5_RULES) && !tcp_exec_l5_rules(sess))
452 goto fail;
453
Willy Tarreau042cd752015-04-08 18:10:49 +0200454 session_count_new(sess);
Christopher Faulet7ce0c892018-04-10 15:01:45 +0200455 if (conn_install_mux_fe(conn, NULL) < 0)
Willy Tarreaud1769b82015-04-06 00:25:48 +0200456 goto fail;
457
Willy Tarreau87787ac2017-08-28 16:22:54 +0200458 /* the embryonic session's task is not needed anymore */
Willy Tarreauf6562792019-05-07 19:05:35 +0200459 task_destroy(sess->task);
460 sess->task = NULL;
Willy Tarreau3e13cba2017-10-08 11:26:30 +0200461 conn_set_owner(conn, sess, conn_session_free);
462
Willy Tarreaud1769b82015-04-06 00:25:48 +0200463 return 0;
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200464
Willy Tarreaud1769b82015-04-06 00:25:48 +0200465 fail:
Willy Tarreau0c4ed352017-09-15 10:06:28 +0200466 if (sess->task)
Willy Tarreau086735a2018-11-05 15:09:47 +0100467 session_kill_embryonic(sess, 0);
Willy Tarreau9903f0e2015-04-04 18:50:31 +0200468 return -1;
469}
470
Willy Tarreaub1ec8c42015-04-03 13:53:24 +0200471/*
472 * Local variables:
473 * c-indent-level: 8
474 * c-basic-offset: 8
475 * End:
476 */