Mercurial > hg > nginx-quic
view src/core/ngx_connection.c @ 5643:436f3605195a
SPDY: consistently handle control frames with unknown type.
The SPDY draft 2 specification requires that if an endpoint receives a
control frame for a type it does not recognize, it must ignore the frame.
But the 3 and 3.1 drafts don't seem to declare any behavior for such case.
Then sticking with the previous draft in this matter looks to be right.
But previously, only 8 least significant bits of the type field were
parsed while the rest of 16 bits of the field were checked against zero.
Though there are no known frame types bigger than 255, this resulted in
inconsistency in handling of such frames: they were not recognized as
valid frames at all, and the connection was closed.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Mon, 07 Apr 2014 19:27:56 +0400 |
parents | f47c844acbd4 |
children | 4440438eb086 |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> ngx_os_io_t ngx_io; static void ngx_drain_connections(void); ngx_listening_t * ngx_create_listening(ngx_conf_t *cf, void *sockaddr, socklen_t socklen) { size_t len; ngx_listening_t *ls; struct sockaddr *sa; u_char text[NGX_SOCKADDR_STRLEN]; ls = ngx_array_push(&cf->cycle->listening); if (ls == NULL) { return NULL; } ngx_memzero(ls, sizeof(ngx_listening_t)); sa = ngx_palloc(cf->pool, socklen); if (sa == NULL) { return NULL; } ngx_memcpy(sa, sockaddr, socklen); ls->sockaddr = sa; ls->socklen = socklen; len = ngx_sock_ntop(sa, socklen, text, NGX_SOCKADDR_STRLEN, 1); ls->addr_text.len = len; switch (ls->sockaddr->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: ls->addr_text_max_len = NGX_INET6_ADDRSTRLEN; break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: ls->addr_text_max_len = NGX_UNIX_ADDRSTRLEN; len++; break; #endif case AF_INET: ls->addr_text_max_len = NGX_INET_ADDRSTRLEN; break; default: ls->addr_text_max_len = NGX_SOCKADDR_STRLEN; break; } ls->addr_text.data = ngx_pnalloc(cf->pool, len); if (ls->addr_text.data == NULL) { return NULL; } ngx_memcpy(ls->addr_text.data, text, len); ls->fd = (ngx_socket_t) -1; ls->type = SOCK_STREAM; ls->backlog = NGX_LISTEN_BACKLOG; ls->rcvbuf = -1; ls->sndbuf = -1; #if (NGX_HAVE_SETFIB) ls->setfib = -1; #endif #if (NGX_HAVE_TCP_FASTOPEN) ls->fastopen = -1; #endif return ls; } ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle) { size_t len; ngx_uint_t i; ngx_listening_t *ls; socklen_t olen; #if (NGX_HAVE_DEFERRED_ACCEPT || NGX_HAVE_TCP_FASTOPEN) ngx_err_t err; #endif #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER) struct accept_filter_arg af; #endif #if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT) int timeout; #endif ls = cycle->listening.elts; for (i = 0; i < cycle->listening.nelts; i++) { ls[i].sockaddr = ngx_palloc(cycle->pool, NGX_SOCKADDRLEN); if (ls[i].sockaddr == NULL) { return NGX_ERROR; } ls[i].socklen = NGX_SOCKADDRLEN; if (getsockname(ls[i].fd, ls[i].sockaddr, &ls[i].socklen) == -1) { ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno, "getsockname() of the inherited " "socket #%d failed", ls[i].fd); ls[i].ignore = 1; continue; } switch (ls[i].sockaddr->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: ls[i].addr_text_max_len = NGX_INET6_ADDRSTRLEN; len = NGX_INET6_ADDRSTRLEN + sizeof("[]:65535") - 1; break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: ls[i].addr_text_max_len = NGX_UNIX_ADDRSTRLEN; len = NGX_UNIX_ADDRSTRLEN; break; #endif case AF_INET: ls[i].addr_text_max_len = NGX_INET_ADDRSTRLEN; len = NGX_INET_ADDRSTRLEN + sizeof(":65535") - 1; break; default: ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno, "the inherited socket #%d has " "an unsupported protocol family", ls[i].fd); ls[i].ignore = 1; continue; } ls[i].addr_text.data = ngx_pnalloc(cycle->pool, len); if (ls[i].addr_text.data == NULL) { return NGX_ERROR; } len = ngx_sock_ntop(ls[i].sockaddr, ls[i].socklen, ls[i].addr_text.data, len, 1); if (len == 0) { return NGX_ERROR; } ls[i].addr_text.len = len; ls[i].backlog = NGX_LISTEN_BACKLOG; olen = sizeof(int); if (getsockopt(ls[i].fd, SOL_SOCKET, SO_RCVBUF, (void *) &ls[i].rcvbuf, &olen) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "getsockopt(SO_RCVBUF) %V failed, ignored", &ls[i].addr_text); ls[i].rcvbuf = -1; } olen = sizeof(int); if (getsockopt(ls[i].fd, SOL_SOCKET, SO_SNDBUF, (void *) &ls[i].sndbuf, &olen) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "getsockopt(SO_SNDBUF) %V failed, ignored", &ls[i].addr_text); ls[i].sndbuf = -1; } #if 0 /* SO_SETFIB is currently a set only option */ #if (NGX_HAVE_SETFIB) olen = sizeof(int); if (getsockopt(ls[i].fd, SOL_SOCKET, SO_SETFIB, (void *) &ls[i].setfib, &olen) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "getsockopt(SO_SETFIB) %V failed, ignored", &ls[i].addr_text); ls[i].setfib = -1; } #endif #endif #if (NGX_HAVE_TCP_FASTOPEN) olen = sizeof(int); if (getsockopt(ls[i].fd, IPPROTO_TCP, TCP_FASTOPEN, (void *) &ls[i].fastopen, &olen) == -1) { err = ngx_socket_errno; if (err != NGX_EOPNOTSUPP && err != NGX_ENOPROTOOPT) { ngx_log_error(NGX_LOG_NOTICE, cycle->log, err, "getsockopt(TCP_FASTOPEN) %V failed, ignored", &ls[i].addr_text); } ls[i].fastopen = -1; } #endif #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER) ngx_memzero(&af, sizeof(struct accept_filter_arg)); olen = sizeof(struct accept_filter_arg); if (getsockopt(ls[i].fd, SOL_SOCKET, SO_ACCEPTFILTER, &af, &olen) == -1) { err = ngx_socket_errno; if (err == NGX_EINVAL) { continue; } ngx_log_error(NGX_LOG_NOTICE, cycle->log, err, "getsockopt(SO_ACCEPTFILTER) for %V failed, ignored", &ls[i].addr_text); continue; } if (olen < sizeof(struct accept_filter_arg) || af.af_name[0] == '\0') { continue; } ls[i].accept_filter = ngx_palloc(cycle->pool, 16); if (ls[i].accept_filter == NULL) { return NGX_ERROR; } (void) ngx_cpystrn((u_char *) ls[i].accept_filter, (u_char *) af.af_name, 16); #endif #if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT) timeout = 0; olen = sizeof(int); if (getsockopt(ls[i].fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &timeout, &olen) == -1) { err = ngx_socket_errno; if (err == NGX_EOPNOTSUPP) { continue; } ngx_log_error(NGX_LOG_NOTICE, cycle->log, err, "getsockopt(TCP_DEFER_ACCEPT) for %V failed, ignored", &ls[i].addr_text); continue; } if (olen < sizeof(int) || timeout == 0) { continue; } ls[i].deferred_accept = 1; #endif } return NGX_OK; } ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle) { int reuseaddr; ngx_uint_t i, tries, failed; ngx_err_t err; ngx_log_t *log; ngx_socket_t s; ngx_listening_t *ls; reuseaddr = 1; #if (NGX_SUPPRESS_WARN) failed = 0; #endif log = cycle->log; /* TODO: configurable try number */ for (tries = 5; tries; tries--) { failed = 0; /* for each listening socket */ ls = cycle->listening.elts; for (i = 0; i < cycle->listening.nelts; i++) { if (ls[i].ignore) { continue; } if (ls[i].fd != (ngx_socket_t) -1) { continue; } if (ls[i].inherited) { /* TODO: close on exit */ /* TODO: nonblocking */ /* TODO: deferred accept */ continue; } s = ngx_socket(ls[i].sockaddr->sa_family, ls[i].type, 0); if (s == (ngx_socket_t) -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, ngx_socket_n " %V failed", &ls[i].addr_text); return NGX_ERROR; } if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const void *) &reuseaddr, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, "setsockopt(SO_REUSEADDR) %V failed", &ls[i].addr_text); if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, ngx_close_socket_n " %V failed", &ls[i].addr_text); } return NGX_ERROR; } #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY) if (ls[i].sockaddr->sa_family == AF_INET6) { int ipv6only; ipv6only = ls[i].ipv6only; if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, (const void *) &ipv6only, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, "setsockopt(IPV6_V6ONLY) %V failed, ignored", &ls[i].addr_text); } } #endif /* TODO: close on exit */ if (!(ngx_event_flags & NGX_USE_AIO_EVENT)) { if (ngx_nonblocking(s) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, ngx_nonblocking_n " %V failed", &ls[i].addr_text); if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, ngx_close_socket_n " %V failed", &ls[i].addr_text); } return NGX_ERROR; } } ngx_log_debug2(NGX_LOG_DEBUG_CORE, log, 0, "bind() %V #%d ", &ls[i].addr_text, s); if (bind(s, ls[i].sockaddr, ls[i].socklen) == -1) { err = ngx_socket_errno; if (err == NGX_EADDRINUSE && ngx_test_config) { continue; } ngx_log_error(NGX_LOG_EMERG, log, err, "bind() to %V failed", &ls[i].addr_text); if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, ngx_close_socket_n " %V failed", &ls[i].addr_text); } if (err != NGX_EADDRINUSE) { return NGX_ERROR; } failed = 1; continue; } #if (NGX_HAVE_UNIX_DOMAIN) if (ls[i].sockaddr->sa_family == AF_UNIX) { mode_t mode; u_char *name; name = ls[i].addr_text.data + sizeof("unix:") - 1; mode = (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH); if (chmod((char *) name, mode) == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "chmod() \"%s\" failed", name); } if (ngx_test_config) { if (ngx_delete_file(name) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, ngx_delete_file_n " %s failed", name); } } } #endif if (listen(s, ls[i].backlog) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, "listen() to %V, backlog %d failed", &ls[i].addr_text, ls[i].backlog); if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, ngx_close_socket_n " %V failed", &ls[i].addr_text); } return NGX_ERROR; } ls[i].listen = 1; ls[i].fd = s; } if (!failed) { break; } /* TODO: delay configurable */ ngx_log_error(NGX_LOG_NOTICE, log, 0, "try again to bind() after 500ms"); ngx_msleep(500); } if (failed) { ngx_log_error(NGX_LOG_EMERG, log, 0, "still could not bind()"); return NGX_ERROR; } return NGX_OK; } void ngx_configure_listening_sockets(ngx_cycle_t *cycle) { int value; ngx_uint_t i; ngx_listening_t *ls; #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER) struct accept_filter_arg af; #endif ls = cycle->listening.elts; for (i = 0; i < cycle->listening.nelts; i++) { ls[i].log = *ls[i].logp; if (ls[i].rcvbuf != -1) { if (setsockopt(ls[i].fd, SOL_SOCKET, SO_RCVBUF, (const void *) &ls[i].rcvbuf, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(SO_RCVBUF, %d) %V failed, ignored", ls[i].rcvbuf, &ls[i].addr_text); } } if (ls[i].sndbuf != -1) { if (setsockopt(ls[i].fd, SOL_SOCKET, SO_SNDBUF, (const void *) &ls[i].sndbuf, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(SO_SNDBUF, %d) %V failed, ignored", ls[i].sndbuf, &ls[i].addr_text); } } if (ls[i].keepalive) { value = (ls[i].keepalive == 1) ? 1 : 0; if (setsockopt(ls[i].fd, SOL_SOCKET, SO_KEEPALIVE, (const void *) &value, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(SO_KEEPALIVE, %d) %V failed, ignored", value, &ls[i].addr_text); } } #if (NGX_HAVE_KEEPALIVE_TUNABLE) if (ls[i].keepidle) { value = ls[i].keepidle; #if (NGX_KEEPALIVE_FACTOR) value *= NGX_KEEPALIVE_FACTOR; #endif if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_KEEPIDLE, (const void *) &value, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(TCP_KEEPIDLE, %d) %V failed, ignored", value, &ls[i].addr_text); } } if (ls[i].keepintvl) { value = ls[i].keepintvl; #if (NGX_KEEPALIVE_FACTOR) value *= NGX_KEEPALIVE_FACTOR; #endif if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_KEEPINTVL, (const void *) &value, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(TCP_KEEPINTVL, %d) %V failed, ignored", value, &ls[i].addr_text); } } if (ls[i].keepcnt) { if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_KEEPCNT, (const void *) &ls[i].keepcnt, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(TCP_KEEPCNT, %d) %V failed, ignored", ls[i].keepcnt, &ls[i].addr_text); } } #endif #if (NGX_HAVE_SETFIB) if (ls[i].setfib != -1) { if (setsockopt(ls[i].fd, SOL_SOCKET, SO_SETFIB, (const void *) &ls[i].setfib, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(SO_SETFIB, %d) %V failed, ignored", ls[i].setfib, &ls[i].addr_text); } } #endif #if (NGX_HAVE_TCP_FASTOPEN) if (ls[i].fastopen != -1) { if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_FASTOPEN, (const void *) &ls[i].fastopen, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(TCP_FASTOPEN, %d) %V failed, ignored", ls[i].fastopen, &ls[i].addr_text); } } #endif #if 0 if (1) { int tcp_nodelay = 1; if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_NODELAY, (const void *) &tcp_nodelay, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(TCP_NODELAY) %V failed, ignored", &ls[i].addr_text); } } #endif if (ls[i].listen) { /* change backlog via listen() */ if (listen(ls[i].fd, ls[i].backlog) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "listen() to %V, backlog %d failed, ignored", &ls[i].addr_text, ls[i].backlog); } } /* * setting deferred mode should be last operation on socket, * because code may prematurely continue cycle on failure */ #if (NGX_HAVE_DEFERRED_ACCEPT) #ifdef SO_ACCEPTFILTER if (ls[i].delete_deferred) { if (setsockopt(ls[i].fd, SOL_SOCKET, SO_ACCEPTFILTER, NULL, 0) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(SO_ACCEPTFILTER, NULL) " "for %V failed, ignored", &ls[i].addr_text); if (ls[i].accept_filter) { ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "could not change the accept filter " "to \"%s\" for %V, ignored", ls[i].accept_filter, &ls[i].addr_text); } continue; } ls[i].deferred_accept = 0; } if (ls[i].add_deferred) { ngx_memzero(&af, sizeof(struct accept_filter_arg)); (void) ngx_cpystrn((u_char *) af.af_name, (u_char *) ls[i].accept_filter, 16); if (setsockopt(ls[i].fd, SOL_SOCKET, SO_ACCEPTFILTER, &af, sizeof(struct accept_filter_arg)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(SO_ACCEPTFILTER, \"%s\") " "for %V failed, ignored", ls[i].accept_filter, &ls[i].addr_text); continue; } ls[i].deferred_accept = 1; } #endif #ifdef TCP_DEFER_ACCEPT if (ls[i].add_deferred || ls[i].delete_deferred) { if (ls[i].add_deferred) { /* * There is no way to find out how long a connection was * in queue (and a connection may bypass deferred queue at all * if syncookies were used), hence we use 1 second timeout * here. */ value = 1; } else { value = 0; } if (setsockopt(ls[i].fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &value, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno, "setsockopt(TCP_DEFER_ACCEPT, %d) for %V failed, " "ignored", value, &ls[i].addr_text); continue; } } if (ls[i].add_deferred) { ls[i].deferred_accept = 1; } #endif #endif /* NGX_HAVE_DEFERRED_ACCEPT */ } return; } void ngx_close_listening_sockets(ngx_cycle_t *cycle) { ngx_uint_t i; ngx_listening_t *ls; ngx_connection_t *c; if (ngx_event_flags & NGX_USE_IOCP_EVENT) { return; } ngx_accept_mutex_held = 0; ngx_use_accept_mutex = 0; ls = cycle->listening.elts; for (i = 0; i < cycle->listening.nelts; i++) { c = ls[i].connection; if (c) { if (c->read->active) { if (ngx_event_flags & NGX_USE_RTSIG_EVENT) { ngx_del_conn(c, NGX_CLOSE_EVENT); } else if (ngx_event_flags & NGX_USE_EPOLL_EVENT) { /* * it seems that Linux-2.6.x OpenVZ sends events * for closed shared listening sockets unless * the events was explicitly deleted */ ngx_del_event(c->read, NGX_READ_EVENT, 0); } else { ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT); } } ngx_free_connection(c); c->fd = (ngx_socket_t) -1; } ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0, "close listening %V #%d ", &ls[i].addr_text, ls[i].fd); if (ngx_close_socket(ls[i].fd) == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno, ngx_close_socket_n " %V failed", &ls[i].addr_text); } #if (NGX_HAVE_UNIX_DOMAIN) if (ls[i].sockaddr->sa_family == AF_UNIX && ngx_process <= NGX_PROCESS_MASTER && ngx_new_binary == 0) { u_char *name = ls[i].addr_text.data + sizeof("unix:") - 1; if (ngx_delete_file(name) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno, ngx_delete_file_n " %s failed", name); } } #endif ls[i].fd = (ngx_socket_t) -1; } cycle->listening.nelts = 0; } ngx_connection_t * ngx_get_connection(ngx_socket_t s, ngx_log_t *log) { ngx_uint_t instance; ngx_event_t *rev, *wev; ngx_connection_t *c; /* disable warning: Win32 SOCKET is u_int while UNIX socket is int */ if (ngx_cycle->files && (ngx_uint_t) s >= ngx_cycle->files_n) { ngx_log_error(NGX_LOG_ALERT, log, 0, "the new socket has number %d, " "but only %ui files are available", s, ngx_cycle->files_n); return NULL; } /* ngx_mutex_lock */ c = ngx_cycle->free_connections; if (c == NULL) { ngx_drain_connections(); c = ngx_cycle->free_connections; } if (c == NULL) { ngx_log_error(NGX_LOG_ALERT, log, 0, "%ui worker_connections are not enough", ngx_cycle->connection_n); /* ngx_mutex_unlock */ return NULL; } ngx_cycle->free_connections = c->data; ngx_cycle->free_connection_n--; /* ngx_mutex_unlock */ if (ngx_cycle->files) { ngx_cycle->files[s] = c; } rev = c->read; wev = c->write; ngx_memzero(c, sizeof(ngx_connection_t)); c->read = rev; c->write = wev; c->fd = s; c->log = log; instance = rev->instance; ngx_memzero(rev, sizeof(ngx_event_t)); ngx_memzero(wev, sizeof(ngx_event_t)); rev->instance = !instance; wev->instance = !instance; rev->index = NGX_INVALID_INDEX; wev->index = NGX_INVALID_INDEX; rev->data = c; wev->data = c; wev->write = 1; return c; } void ngx_free_connection(ngx_connection_t *c) { /* ngx_mutex_lock */ c->data = ngx_cycle->free_connections; ngx_cycle->free_connections = c; ngx_cycle->free_connection_n++; /* ngx_mutex_unlock */ if (ngx_cycle->files) { ngx_cycle->files[c->fd] = NULL; } } void ngx_close_connection(ngx_connection_t *c) { ngx_err_t err; ngx_uint_t log_error, level; ngx_socket_t fd; if (c->fd == (ngx_socket_t) -1) { ngx_log_error(NGX_LOG_ALERT, c->log, 0, "connection already closed"); return; } if (c->read->timer_set) { ngx_del_timer(c->read); } if (c->write->timer_set) { ngx_del_timer(c->write); } if (ngx_del_conn) { ngx_del_conn(c, NGX_CLOSE_EVENT); } else { if (c->read->active || c->read->disabled) { ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT); } if (c->write->active || c->write->disabled) { ngx_del_event(c->write, NGX_WRITE_EVENT, NGX_CLOSE_EVENT); } } #if (NGX_THREADS) /* * we have to clean the connection information before the closing * because another thread may reopen the same file descriptor * before we clean the connection */ ngx_mutex_lock(ngx_posted_events_mutex); if (c->read->prev) { ngx_delete_posted_event(c->read); } if (c->write->prev) { ngx_delete_posted_event(c->write); } c->read->closed = 1; c->write->closed = 1; ngx_unlock(&c->lock); c->read->locked = 0; c->write->locked = 0; ngx_mutex_unlock(ngx_posted_events_mutex); #else if (c->read->prev) { ngx_delete_posted_event(c->read); } if (c->write->prev) { ngx_delete_posted_event(c->write); } c->read->closed = 1; c->write->closed = 1; #endif ngx_reusable_connection(c, 0); log_error = c->log_error; ngx_free_connection(c); fd = c->fd; c->fd = (ngx_socket_t) -1; if (ngx_close_socket(fd) == -1) { err = ngx_socket_errno; if (err == NGX_ECONNRESET || err == NGX_ENOTCONN) { switch (log_error) { case NGX_ERROR_INFO: level = NGX_LOG_INFO; break; case NGX_ERROR_ERR: level = NGX_LOG_ERR; break; default: level = NGX_LOG_CRIT; } } else { level = NGX_LOG_CRIT; } /* we use ngx_cycle->log because c->log was in c->pool */ ngx_log_error(level, ngx_cycle->log, err, ngx_close_socket_n " %d failed", fd); } } void ngx_reusable_connection(ngx_connection_t *c, ngx_uint_t reusable) { ngx_log_debug1(NGX_LOG_DEBUG_CORE, c->log, 0, "reusable connection: %ui", reusable); if (c->reusable) { ngx_queue_remove(&c->queue); #if (NGX_STAT_STUB) (void) ngx_atomic_fetch_add(ngx_stat_waiting, -1); #endif } c->reusable = reusable; if (reusable) { /* need cast as ngx_cycle is volatile */ ngx_queue_insert_head( (ngx_queue_t *) &ngx_cycle->reusable_connections_queue, &c->queue); #if (NGX_STAT_STUB) (void) ngx_atomic_fetch_add(ngx_stat_waiting, 1); #endif } } static void ngx_drain_connections(void) { ngx_int_t i; ngx_queue_t *q; ngx_connection_t *c; for (i = 0; i < 32; i++) { if (ngx_queue_empty(&ngx_cycle->reusable_connections_queue)) { break; } q = ngx_queue_last(&ngx_cycle->reusable_connections_queue); c = ngx_queue_data(q, ngx_connection_t, queue); ngx_log_debug0(NGX_LOG_DEBUG_CORE, c->log, 0, "reusing connection"); c->close = 1; c->read->handler(c->read); } } ngx_int_t ngx_connection_local_sockaddr(ngx_connection_t *c, ngx_str_t *s, ngx_uint_t port) { socklen_t len; ngx_uint_t addr; u_char sa[NGX_SOCKADDRLEN]; struct sockaddr_in *sin; #if (NGX_HAVE_INET6) ngx_uint_t i; struct sockaddr_in6 *sin6; #endif if (c->local_socklen == 0) { return NGX_ERROR; } switch (c->local_sockaddr->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) c->local_sockaddr; for (addr = 0, i = 0; addr == 0 && i < 16; i++) { addr |= sin6->sin6_addr.s6_addr[i]; } break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: addr = 1; break; #endif default: /* AF_INET */ sin = (struct sockaddr_in *) c->local_sockaddr; addr = sin->sin_addr.s_addr; break; } if (addr == 0) { len = NGX_SOCKADDRLEN; if (getsockname(c->fd, (struct sockaddr *) &sa, &len) == -1) { ngx_connection_error(c, ngx_socket_errno, "getsockname() failed"); return NGX_ERROR; } c->local_sockaddr = ngx_palloc(c->pool, len); if (c->local_sockaddr == NULL) { return NGX_ERROR; } ngx_memcpy(c->local_sockaddr, &sa, len); c->local_socklen = len; } if (s == NULL) { return NGX_OK; } s->len = ngx_sock_ntop(c->local_sockaddr, c->local_socklen, s->data, s->len, port); return NGX_OK; } ngx_int_t ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text) { ngx_uint_t level; /* Winsock may return NGX_ECONNABORTED instead of NGX_ECONNRESET */ if ((err == NGX_ECONNRESET #if (NGX_WIN32) || err == NGX_ECONNABORTED #endif ) && c->log_error == NGX_ERROR_IGNORE_ECONNRESET) { return 0; } #if (NGX_SOLARIS) if (err == NGX_EINVAL && c->log_error == NGX_ERROR_IGNORE_EINVAL) { return 0; } #endif if (err == 0 || err == NGX_ECONNRESET #if (NGX_WIN32) || err == NGX_ECONNABORTED #else || err == NGX_EPIPE #endif || err == NGX_ENOTCONN || err == NGX_ETIMEDOUT || err == NGX_ECONNREFUSED || err == NGX_ENETDOWN || err == NGX_ENETUNREACH || err == NGX_EHOSTDOWN || err == NGX_EHOSTUNREACH) { switch (c->log_error) { case NGX_ERROR_IGNORE_EINVAL: case NGX_ERROR_IGNORE_ECONNRESET: case NGX_ERROR_INFO: level = NGX_LOG_INFO; break; default: level = NGX_LOG_ERR; } } else { level = NGX_LOG_ALERT; } ngx_log_error(level, c->log, err, text); return NGX_ERROR; }