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src/event/ngx_event_connect.c - nginx source code
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_event.h>
- #include <ngx_event_connect.h>
- #if (NGX_HAVE_TRANSPARENT_PROXY)
- static ngx_int_t ngx_event_connect_set_transparent(ngx_peer_connection_t *pc,
- ngx_socket_t s);
- #endif
- ngx_int_t
- ngx_event_connect_peer(ngx_peer_connection_t *pc)
- {
- int rc, type, value;
- #if (NGX_HAVE_IP_BIND_ADDRESS_NO_PORT || NGX_LINUX)
- in_port_t port;
- #endif
- ngx_int_t event;
- ngx_err_t err;
- ngx_uint_t level;
- ngx_socket_t s;
- ngx_event_t *rev, *wev;
- ngx_connection_t *c;
- rc = pc->get(pc, pc->data);
- if (rc != NGX_OK) {
- return rc;
- }
- type = (pc->type ? pc->type : SOCK_STREAM);
- s = ngx_socket(pc->sockaddr->sa_family, type, 0);
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, pc->log, 0, "%s socket %d",
- (type == SOCK_STREAM) ? "stream" : "dgram", s);
- if (s == (ngx_socket_t) -1) {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- ngx_socket_n " failed");
- return NGX_ERROR;
- }
- c = ngx_get_connection(s, pc->log);
- if (c == NULL) {
- if (ngx_close_socket(s) == -1) {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- ngx_close_socket_n " failed");
- }
- return NGX_ERROR;
- }
- c->type = type;
- if (pc->rcvbuf) {
- if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
- (const void *) &pc->rcvbuf, sizeof(int)) == -1)
- {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- "setsockopt(SO_RCVBUF) failed");
- goto failed;
- }
- }
- if (pc->so_keepalive) {
- value = 1;
- if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,
- (const void *) &value, sizeof(int))
- == -1)
- {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- "setsockopt(SO_KEEPALIVE) failed, ignored");
- }
- }
- if (ngx_nonblocking(s) == -1) {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- ngx_nonblocking_n " failed");
- goto failed;
- }
- if (pc->local) {
- #if (NGX_HAVE_TRANSPARENT_PROXY)
- if (pc->transparent) {
- if (ngx_event_connect_set_transparent(pc, s) != NGX_OK) {
- goto failed;
- }
- }
- #endif
- #if (NGX_HAVE_IP_BIND_ADDRESS_NO_PORT || NGX_LINUX)
- port = ngx_inet_get_port(pc->local->sockaddr);
- #endif
- #if (NGX_HAVE_IP_BIND_ADDRESS_NO_PORT)
- if (pc->sockaddr->sa_family != AF_UNIX && port == 0) {
- static int bind_address_no_port = 1;
- if (bind_address_no_port) {
- if (setsockopt(s, IPPROTO_IP, IP_BIND_ADDRESS_NO_PORT,
- (const void *) &bind_address_no_port,
- sizeof(int)) == -1)
- {
- err = ngx_socket_errno;
- if (err != NGX_EOPNOTSUPP && err != NGX_ENOPROTOOPT) {
- ngx_log_error(NGX_LOG_ALERT, pc->log, err,
- "setsockopt(IP_BIND_ADDRESS_NO_PORT) "
- "failed, ignored");
- } else {
- bind_address_no_port = 0;
- }
- }
- }
- }
- #endif
- #if (NGX_LINUX)
- if (pc->type == SOCK_DGRAM && port != 0) {
- int reuse_addr = 1;
- if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
- (const void *) &reuse_addr, sizeof(int))
- == -1)
- {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- "setsockopt(SO_REUSEADDR) failed");
- goto failed;
- }
- }
- #endif
- if (bind(s, pc->local->sockaddr, pc->local->socklen) == -1) {
- ngx_log_error(NGX_LOG_CRIT, pc->log, ngx_socket_errno,
- "bind(%V) failed", &pc->local->name);
- goto failed;
- }
- }
- if (type == SOCK_STREAM) {
- c->recv = ngx_recv;
- c->send = ngx_send;
- c->recv_chain = ngx_recv_chain;
- c->send_chain = ngx_send_chain;
- c->sendfile = 1;
- if (pc->sockaddr->sa_family == AF_UNIX) {
- c->tcp_nopush = NGX_TCP_NOPUSH_DISABLED;
- c->tcp_nodelay = NGX_TCP_NODELAY_DISABLED;
- #if (NGX_SOLARIS)
-
- c->sendfile = 0;
- #endif
- }
- } else {
- c->recv = ngx_udp_recv;
- c->send = ngx_send;
- c->send_chain = ngx_udp_send_chain;
- c->need_flush_buf = 1;
- }
- c->log_error = pc->log_error;
- rev = c->read;
- wev = c->write;
- rev->log = pc->log;
- wev->log = pc->log;
- pc->connection = c;
- c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1);
- c->start_time = ngx_current_msec;
- if (ngx_add_conn) {
- if (ngx_add_conn(c) == NGX_ERROR) {
- goto failed;
- }
- }
- ngx_log_debug3(NGX_LOG_DEBUG_EVENT, pc->log, 0,
- "connect to %V, fd:%d #%uA", pc->name, s, c->number);
- rc = connect(s, pc->sockaddr, pc->socklen);
- if (rc == -1) {
- err = ngx_socket_errno;
- if (err != NGX_EINPROGRESS
- #if (NGX_WIN32)
-
- && err != NGX_EAGAIN
- #endif
- )
- {
- if (err == NGX_ECONNREFUSED
- #if (NGX_LINUX)
-
- || err == NGX_EAGAIN
- #endif
- || err == NGX_ECONNRESET
- || err == NGX_ENETDOWN
- || err == NGX_ENETUNREACH
- || err == NGX_EHOSTDOWN
- || err == NGX_EHOSTUNREACH)
- {
- level = NGX_LOG_ERR;
- } else {
- level = NGX_LOG_CRIT;
- }
- ngx_log_error(level, c->log, err, "connect() to %V failed",
- pc->name);
- ngx_close_connection(c);
- pc->connection = NULL;
- return NGX_DECLINED;
- }
- }
- if (ngx_add_conn) {
- if (rc == -1) {
-
- return NGX_AGAIN;
- }
- ngx_log_debug0(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connected");
- wev->ready = 1;
- return NGX_OK;
- }
- if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, ngx_socket_errno,
- "connect(): %d", rc);
- if (ngx_blocking(s) == -1) {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- ngx_blocking_n " failed");
- goto failed;
- }
-
- TODO
- rev->ready = 1;
- wev->ready = 1;
- return NGX_OK;
- }
- if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
-
- event = NGX_CLEAR_EVENT;
- } else {
-
- event = NGX_LEVEL_EVENT;
- }
- if (ngx_add_event(rev, NGX_READ_EVENT, event) != NGX_OK) {
- goto failed;
- }
- if (rc == -1) {
-
- if (ngx_add_event(wev, NGX_WRITE_EVENT, event) != NGX_OK) {
- goto failed;
- }
- return NGX_AGAIN;
- }
- ngx_log_debug0(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connected");
- wev->ready = 1;
- return NGX_OK;
- failed:
- ngx_close_connection(c);
- pc->connection = NULL;
- return NGX_ERROR;
- }
- #if (NGX_HAVE_TRANSPARENT_PROXY)
- static ngx_int_t
- ngx_event_connect_set_transparent(ngx_peer_connection_t *pc, ngx_socket_t s)
- {
- int value;
- value = 1;
- #if defined(SO_BINDANY)
- if (setsockopt(s, SOL_SOCKET, SO_BINDANY,
- (const void *) &value, sizeof(int)) == -1)
- {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- "setsockopt(SO_BINDANY) failed");
- return NGX_ERROR;
- }
- #else
- switch (pc->local->sockaddr->sa_family) {
- case AF_INET:
- #if defined(IP_TRANSPARENT)
- if (setsockopt(s, IPPROTO_IP, IP_TRANSPARENT,
- (const void *) &value, sizeof(int)) == -1)
- {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- "setsockopt(IP_TRANSPARENT) failed");
- return NGX_ERROR;
- }
- #elif defined(IP_BINDANY)
- if (setsockopt(s, IPPROTO_IP, IP_BINDANY,
- (const void *) &value, sizeof(int)) == -1)
- {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- "setsockopt(IP_BINDANY) failed");
- return NGX_ERROR;
- }
- #endif
- break;
- #if (NGX_HAVE_INET6)
- case AF_INET6:
- #if defined(IPV6_TRANSPARENT)
- if (setsockopt(s, IPPROTO_IPV6, IPV6_TRANSPARENT,
- (const void *) &value, sizeof(int)) == -1)
- {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- "setsockopt(IPV6_TRANSPARENT) failed");
- return NGX_ERROR;
- }
- #elif defined(IPV6_BINDANY)
- if (setsockopt(s, IPPROTO_IPV6, IPV6_BINDANY,
- (const void *) &value, sizeof(int)) == -1)
- {
- ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
- "setsockopt(IPV6_BINDANY) failed");
- return NGX_ERROR;
- }
- #else
- ngx_log_error(NGX_LOG_ALERT, pc->log, 0,
- "could not enable transparent proxying for IPv6 "
- "on this platform");
- return NGX_ERROR;
- #endif
- break;
- #endif
- }
- #endif
- return NGX_OK;
- }
- #endif
- ngx_int_t
- ngx_event_get_peer(ngx_peer_connection_t *pc, void *data)
- {
- return NGX_OK;
- }
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