3 * Copyright (C) Igor Sysoev
7 #include <ngx_config.h>
10 #include <ngx_event_connect.h>
14 ngx_event_connect_peer(ngx_peer_connection_t *pc)
21 ngx_event_t *rev, *wev;
24 rc = pc->get(pc, pc->data);
29 s = ngx_socket(pc->sockaddr->sa_family, SOCK_STREAM, 0);
31 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, 0, "socket %d", s);
34 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
35 ngx_socket_n " failed");
40 c = ngx_get_connection(s, pc->log);
43 if (ngx_close_socket(s) == -1) {
44 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
45 ngx_close_socket_n "failed");
52 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
53 (const void *) &pc->rcvbuf, sizeof(int)) == -1)
55 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
56 "setsockopt(SO_RCVBUF) failed");
58 ngx_free_connection(c);
60 if (ngx_close_socket(s) == -1) {
61 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
62 ngx_close_socket_n " failed");
69 if (ngx_nonblocking(s) == -1) {
70 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
71 ngx_nonblocking_n " failed");
73 ngx_free_connection(c);
75 if (ngx_close_socket(s) == -1) {
76 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
77 ngx_close_socket_n " failed");
85 c->recv_chain = ngx_recv_chain;
86 c->send_chain = ngx_send_chain;
90 c->log_error = pc->log_error;
92 if (pc->sockaddr->sa_family != AF_INET) {
93 c->tcp_nopush = NGX_TCP_NOPUSH_DISABLED;
94 c->tcp_nodelay = NGX_TCP_NODELAY_DISABLED;
97 /* Solaris's sendfilev() supports AF_NCA, AF_INET, and AF_INET6 */
111 * TODO: MT: - ngx_atomic_fetch_add()
112 * or protection by critical section or mutex
114 * TODO: MP: - allocated in a shared memory
115 * - ngx_atomic_fetch_add()
116 * or protection by critical section or mutex
119 c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1);
122 rev->lock = pc->lock;
123 wev->lock = pc->lock;
124 rev->own_lock = &c->lock;
125 wev->own_lock = &c->lock;
129 if (ngx_add_conn(c) == NGX_ERROR) {
134 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, pc->log, 0,
135 "connect to %V, fd:%d #%d", pc->name, s, c->number);
137 rc = connect(s, pc->sockaddr, pc->socklen);
140 err = ngx_socket_errno;
143 if (err != NGX_EINPROGRESS
145 /* Winsock returns WSAEWOULDBLOCK (NGX_EAGAIN) */
150 if (err == NGX_ECONNREFUSED
153 * Linux returns EAGAIN instead of ECONNREFUSED
154 * for unix sockets if listen queue is full
158 || err == NGX_ENETDOWN
159 || err == NGX_ENETUNREACH
160 || err == NGX_EHOSTDOWN
161 || err == NGX_EHOSTUNREACH)
166 level = NGX_LOG_CRIT;
169 ngx_log_error(level, c->log, err, "connect() to %V failed",
179 /* NGX_EINPROGRESS */
184 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connected");
191 if (ngx_event_flags & NGX_USE_AIO_EVENT) {
193 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, ngx_socket_errno,
194 "connect(): %d", rc);
198 if (ngx_blocking(s) == -1) {
199 ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
200 ngx_blocking_n " failed");
205 * FreeBSD's aio allows to post an operation on non-connected socket.
206 * NT does not support it.
208 * TODO: check in Win32, etc. As workaround we can use NGX_ONESHOT_EVENT
217 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
221 event = NGX_CLEAR_EVENT;
225 /* select, poll, /dev/poll */
227 event = NGX_LEVEL_EVENT;
230 if (ngx_add_event(rev, NGX_READ_EVENT, event) != NGX_OK) {
236 /* NGX_EINPROGRESS */
238 if (ngx_add_event(wev, NGX_WRITE_EVENT, event) != NGX_OK) {
245 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connected");
254 ngx_event_get_peer(ngx_peer_connection_t *pc, void *data)