ngx_int_t
ngx_add_channel_event(ngx_cycle_t *cycle, ngx_fd_t fd, ngx_int_t event,
ngx_event_handler_pt handler)
{
syslog(LOG_INFO, "[%s:%s:%d]\n", __FILE__, __func__, __LINE__);
ngx_event_t *ev, *rev, *wev;
ngx_connection_t *c;
c = ngx_get_connection(fd, cycle->log);
if (c == NULL) {
return NGX_ERROR;
}
c->pool = cycle->pool;
rev = c->read;
wev = c->write;
rev->log = cycle->log;
wev->log = cycle->log;
#if (NGX_THREADS)
rev->lock = &c->lock;
wev->lock = &c->lock;
rev->own_lock = &c->lock;
wev->own_lock = &c->lock;
#endif
rev->channel = 1;
wev->channel = 1;
ev = (event == NGX_READ_EVENT) ? rev : wev;
ev->handler = handler;
if (ngx_add_conn && (ngx_event_flags & NGX_USE_EPOLL_EVENT) == 0) {
if (ngx_add_conn(c) == NGX_ERROR) {
ngx_free_connection(c);
return NGX_ERROR;
}
} else {
if (ngx_add_event(ev, event, 0) == NGX_ERROR) {
ngx_free_connection(c);
return NGX_ERROR;
}
}
return NGX_OK;
}
ngx_int_t
ngx_add_channel_event(ngx_cycle_t *cycle, ngx_fd_t fd, ngx_int_t event, ngx_event_handler_pt handler)
{
ngx_event_t *ev, *rev, *wev;
ngx_connection_t *c;
c = ngx_get_connection(fd, cycle->log);
if (c == NULL)
{
return NGX_ERROR;
}
c->pool = cycle->pool;
rev = c->read;
wev = c->write;
rev->log = cycle->log;
wev->log = cycle->log;
rev->channel = 1;
wev->channel = 1;
ev = (event == NGX_READ_EVENT) ? rev : wev;
ev->handler = handler;
if (ngx_add_conn && (ngx_event_flags & NGX_USE_EPOLL_EVENT) == 0)
{
if (ngx_add_conn(c) == NGX_ERROR)
{
ngx_free_connection(c);
return NGX_ERROR;
}
}
else
{
if (ngx_add_event(ev, event, 0) == NGX_ERROR)
{
ngx_free_connection(c);
return NGX_ERROR;
}
}
return NGX_OK;
}
void
redis_nginx_cleanup(void *privdata)
{
if (privdata) {
ngx_connection_t *connection = (ngx_connection_t *) privdata;
redisAsyncContext *ac = (redisAsyncContext *) connection->data;
if (ac->err) {
nchan_store_redis_connection_close_handler(ac);
//ngx_log_error(NGX_LOG_ERR, ngx_cycle->log, 0, "redis_nginx_adapter: connection to redis failed - %s", ac->errstr);
/**
* If the context had an error but the fd still valid is because another context got the same fd from OS.
* So we clean the reference to this fd on redisAsyncContext and on ngx_connection, avoiding close a socket in use.
*/
if (redis_nginx_fd_is_valid(ac->c.fd)) {
ac->c.fd = -1;
connection->fd = NGX_INVALID_FILE;
}
}
if ((connection->fd != NGX_INVALID_FILE)) {
redis_nginx_del_read(privdata);
redis_nginx_del_write(privdata);
ngx_close_connection(connection);
} else {
ngx_free_connection(connection);
}
ac->ev.data = NULL;
}
}
// 发生了错误，关闭一个连接
static void
ngx_close_accepted_connection(ngx_connection_t *c)
{
ngx_socket_t fd;
// 释放连接，加入空闲链表
// in core/ngx_connection.c
ngx_free_connection(c);
// 连接的描述符置为无效
fd = c->fd;
c->fd = (ngx_socket_t) -1;
// 关闭socket
if (!c->shared && ngx_close_socket(fd) == -1) {
ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno,
ngx_close_socket_n " failed");
}
// 释放连接相关的所有内存
if (c->pool) {
ngx_destroy_pool(c->pool);
}
#if (NGX_STAT_STUB)
(void) ngx_atomic_fetch_add(ngx_stat_active, -1);
#endif
}
void
ngx_postgres_upstream_free_connection(ngx_log_t *log, ngx_connection_t *c,
PGconn *pgconn, ngx_postgres_upstream_srv_conf_t *pgscf)
{
ngx_event_t *rev, *wev;
dd("entering");
PQfinish(pgconn);
if (c) {
rev = c->read;
wev = c->write;
if (rev->timer_set) {
ngx_del_timer(rev);
}
if (wev->timer_set) {
ngx_del_timer(wev);
}
if (ngx_del_conn) {
ngx_del_conn(c, NGX_CLOSE_EVENT);
} else {
if (rev->active || rev->disabled) {
ngx_del_event(rev, NGX_READ_EVENT, NGX_CLOSE_EVENT);
}
if (wev->active || wev->disabled) {
ngx_del_event(wev, NGX_WRITE_EVENT, NGX_CLOSE_EVENT);
}
}
if (rev->prev) {
ngx_delete_posted_event(rev);
}
if (wev->prev) {
ngx_delete_posted_event(wev);
}
rev->closed = 1;
wev->closed = 1;
#if defined(nginx_version) && (nginx_version >= 1001004)
if (c->pool) {
ngx_destroy_pool(c->pool);
}
#endif
ngx_free_connection(c);
}
/* free spot in keepalive connection pool */
pgscf->active_conns--;
dd("returning");
}
void
ngx_zeromq_close(ngx_connection_t *c)
{
void *zmq;
if (c->fd == -1) {
return;
}
zmq = c->data;
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"zmq_close: zmq:%p fd:%d #%d", zmq, c->fd, c->number);
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 (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_reusable_connection(c, 0);
ngx_free_connection(c);
c->fd = (ngx_socket_t) -1;
if (zmq_close(zmq) == -1) {
ngx_zeromq_log_error(ngx_cycle->log, "zmq_close()");
}
}
static void
ngx_close_udp_connection(ngx_connection_t *c)
{
ngx_free_connection(c);
if (c->pool) {
ngx_destroy_pool(c->pool);
}
#if (NGX_STAT_STUB)
(void) ngx_atomic_fetch_add(ngx_stat_active, -1);
#endif
}
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->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 explicity 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);
}
}
}
int ngx_rpc_notify_unregister(ngx_rpc_notify_t* notify)
{
ngx_log_debug(NGX_LOG_DEBUG_ALL, ngx_cycle->log, 0,
"ngx_rpc_notify_unregister notify:%p eventfd:%d",
notify, notify->event_fd);
ngx_del_conn(notify->notify_conn, 0);
close(notify->event_fd);
notify->notify_conn->pool = NULL;
ngx_free_connection(notify->notify_conn);
return NGX_OK;
}
static ngx_int_t
ngx_http_statsd_udp_send(ngx_udp_endpoint_t *l, u_char *buf, size_t len)
{
ssize_t n;
ngx_udp_connection_t *uc;
uc = l->udp_connection;
if (!uc) {
return NGX_ERROR;
}
if (uc->connection == NULL) {
uc->log = *l->log;
uc->log.handler = NULL;
uc->log.data = NULL;
uc->log.action = "logging";
if(ngx_udp_connect(uc) != NGX_OK) {
if(uc->connection != NULL) {
ngx_free_connection(uc->connection);
uc->connection = NULL;
}
return NGX_ERROR;
}
uc->connection->data = l;
uc->connection->read->handler = ngx_http_statsd_udp_dummy_handler;
uc->connection->read->resolver = 0;
}
n = ngx_send(uc->connection, buf, len);
if (n == -1) {
return NGX_ERROR;
}
if ((size_t) n != (size_t) len) {
#if defined nginx_version && nginx_version >= 8032
ngx_log_error(NGX_LOG_CRIT, &uc->log, 0, "send() incomplete");
#else
ngx_log_error(NGX_LOG_CRIT, uc->log, 0, "send() incomplete");
#endif
return NGX_ERROR;
}
return NGX_OK;
}
static void
ngx_close_posted_connection(ngx_connection_t *c)
{
ngx_socket_t fd;
ngx_free_connection(c);
fd = c->fd;
c->fd = (ngx_socket_t) - 1;
if (ngx_close_socket(fd) == -1)
{
ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno,
ngx_close_socket_n " failed");
}
if (c->pool)
{
ngx_destroy_pool(c->pool);
}
}
void nchan_close_fake_connection(ngx_connection_t *c) {
ngx_pool_t *pool;
ngx_connection_t *saved_c = NULL;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http close fake http connection %p", c);
c->destroyed = 1;
pool = c->pool;
if (c->read->timer_set) {
ngx_del_timer(c->read);
}
if (c->write->timer_set) {
ngx_del_timer(c->write);
}
c->read->closed = 1;
c->write->closed = 1;
/* we temporarily use a valid fd (0) to make ngx_free_connection happy */
c->fd = 0;
if (ngx_cycle->files) {
saved_c = ngx_cycle->files[0];
}
ngx_free_connection(c);
c->fd = (ngx_socket_t) -1;
if (ngx_cycle->files) {
ngx_cycle->files[0] = saved_c;
}
if (pool) {
ngx_destroy_pool(pool);
}
}
static void
ngx_close_accepted_connection(ngx_connection_t *c)
{
ngx_socket_t fd;
ngx_free_connection(c);
fd = c->fd;
c->fd = (ngx_socket_t) -1;
if (ngx_close_socket(fd) == -1) {
ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno,
ngx_close_socket_n " failed");
}
if (c->pool) {
ngx_destroy_pool(c->pool);
}
#if (NGX_STAT_STUB)
(void) ngx_atomic_fetch_add(ngx_stat_active, -1);
#endif
}
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;
}
//首先将连接的读写事件从定时器中取出
if (c->read->timer_set) {
ngx_del_timer(c->read);
}
if (c->write->timer_set) {
ngx_del_timer(c->write);
}
if (ngx_del_conn) { //将读写事件从epoll中移除
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 (c->read->posted) {
ngx_delete_posted_event(c->read);
}
if (c->write->posted) {
ngx_delete_posted_event(c->write);
}
c->read->closed = 1;
c->write->closed = 1;
ngx_reusable_connection(c, 0);
log_error = c->log_error;
//调用ngx_free_connection方法把表示连接的ngx_connection_t结构体归还给ngx_cycle_t核心结构体的空闲连接池
ngx_free_connection(c);
fd = c->fd;
c->fd = (ngx_socket_t) -1;
if (ngx_close_socket(fd) == -1) { //系统调用close
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);
}
}
//关闭cycle中listening动态数组已经打开的句柄
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_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_int_t
ngx_http_drizzle_handler(ngx_http_request_t *r)
{
ngx_http_upstream_t *u;
ngx_http_drizzle_loc_conf_t *dlcf;
#if defined(nginx_version) && nginx_version < 8017
ngx_http_drizzle_ctx_t *dctx;
#endif
ngx_http_core_loc_conf_t *clcf;
ngx_str_t target;
ngx_url_t url;
ngx_connection_t *c;
dd("request: %p", r);
dd("subrequest in memory: %d", (int) r->subrequest_in_memory);
dd("connection: %p", r->connection);
dd("connection log: %p", r->connection->log);
if (r->subrequest_in_memory) {
/* TODO: add support for subrequest in memory by
* emitting output into u->buffer instead */
ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
"ngx_http_drizzle_module does not support "
"subrequest in memory");
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
dlcf = ngx_http_get_module_loc_conf(r, ngx_http_drizzle_module);
if ((dlcf->default_query == NULL) && !(dlcf->methods_set & r->method)) {
if (dlcf->methods_set != 0) {
return NGX_HTTP_NOT_ALLOWED;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"drizzle: missing \"drizzle_query\" in location \"%V\"",
&clcf->name);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
dd("XXX upstream already exists? %p", r->upstream);
#if defined(nginx_version) && \
((nginx_version >= 7063 && nginx_version < 8000) \
|| nginx_version >= 8007)
dd("creating upstream.......");
if (ngx_http_upstream_create(r) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
u = r->upstream;
#else /* 0.7.x < 0.7.63, 0.8.x < 0.8.7 */
dd("XXX create upstream");
u = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_t));
if (u == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
u->peer.log = r->connection->log;
u->peer.log_error = NGX_ERROR_ERR;
# if (NGX_THREADS)
u->peer.lock = &r->connection->lock;
# endif
r->upstream = u;
#endif
if (dlcf->complex_target) {
/* variables used in the drizzle_pass directive */
if (ngx_http_complex_value(r, dlcf->complex_target, &target)
!= NGX_OK)
{
dd("failed to compile");
return NGX_ERROR;
}
if (target.len == 0) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"drizzle: handler: empty \"drizzle_pass\" target");
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
url.host = target;
url.port = 0;
url.no_resolve = 1;
dlcf->upstream.upstream = ngx_http_upstream_drizzle_add(r, &url);
if (dlcf->upstream.upstream == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"drizzle: upstream \"%V\" not found", &target);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
}
#if defined(nginx_version) && nginx_version < 8017
dctx = ngx_pcalloc(r->pool, sizeof(ngx_http_drizzle_ctx_t));
if (dctx == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_http_set_ctx(r, dctx, ngx_http_drizzle_module);
#endif
u->schema.len = sizeof("drizzle://") - 1;
u->schema.data = (u_char *) "drizzle://";
u->output.tag = (ngx_buf_tag_t) &ngx_http_drizzle_module;
dd("drizzle tag: %p", (void *) u->output.tag);
u->conf = &dlcf->upstream;
u->create_request = ngx_http_drizzle_create_request;
u->reinit_request = ngx_http_drizzle_reinit_request;
u->process_header = ngx_http_drizzle_process_header;
u->abort_request = ngx_http_drizzle_abort_request;
u->finalize_request = ngx_http_drizzle_finalize_request;
/* we bypass the upstream input filter mechanism in
* ngx_http_upstream_process_headers */
u->input_filter_init = ngx_http_drizzle_input_filter_init;
u->input_filter = ngx_http_drizzle_input_filter;
u->input_filter_ctx = NULL;
#if defined(nginx_version) && nginx_version >= 8011
r->main->count++;
#endif
dd("XXX connect timeout: %d", (int) dlcf->upstream.connect_timeout);
ngx_http_upstream_dbd_init(r);
/* override the read/write event handler to our own */
u->write_event_handler = ngx_http_drizzle_wev_handler;
u->read_event_handler = ngx_http_drizzle_rev_handler;
/* a bit hack-ish way to return error response (clean-up part) */
if ((u->peer.connection) && (u->peer.connection->fd == 0)) {
c = u->peer.connection;
u->peer.connection = NULL;
if (c->write->timer_set) {
ngx_del_timer(c->write);
}
ngx_free_connection(c);
ngx_http_upstream_drizzle_finalize_request(r, u,
#if defined(nginx_version) && (nginx_version >= 8017)
NGX_HTTP_SERVICE_UNAVAILABLE);
#else
dctx->status ? dctx->status : NGX_HTTP_INTERNAL_SERVER_ERROR);
#endif
}
ngx_int_t
ngx_zeromq_connect(ngx_peer_connection_t *pc)
{
ngx_connection_t *c;
ngx_event_t *rev, *wev;
void *zmq;
int fd, zero;
size_t fdsize;
zmq = zmq_socket(zmq_context, ZMQ_REQ);
if (zmq == NULL) {
ngx_zeromq_log_error(pc->log, "zmq_socket(ZMQ_REQ)");
return NGX_ERROR;
}
fdsize = sizeof(int);
if (zmq_getsockopt(zmq, ZMQ_FD, &fd, &fdsize) == -1) {
ngx_zeromq_log_error(pc->log, "zmq_getsockopt(ZMQ_FD)");
goto failed_zmq;
}
zero = 0;
if (zmq_setsockopt(zmq, ZMQ_LINGER, &zero, sizeof(int)) == -1) {
ngx_zeromq_log_error(pc->log, "zmq_setsockopt(ZMQ_LINGER)");
goto failed_zmq;
}
c = ngx_get_connection(fd, pc->log);
if (c == NULL) {
goto failed_zmq;
}
c->data = zmq;
c->recv = ngx_zeromq_recv;
c->send = ngx_zeromq_send;
c->recv_chain = ngx_zeromq_recv_chain;
c->send_chain = ngx_zeromq_send_chain;
/* This won't fly with ZeroMQ */
c->sendfile = 0;
c->tcp_nopush = NGX_TCP_NOPUSH_DISABLED;
c->tcp_nodelay = NGX_TCP_NODELAY_DISABLED;
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);
if (pc->local) {
ngx_log_error(NGX_LOG_WARN, pc->log, 0,
"zmq_connect: binding to local address is not supported");
}
if (zmq_connect(zmq, (const char *) pc->data) == -1) {
ngx_zeromq_log_error(pc->log, "zmq_connect()");
goto failed;
}
ngx_log_debug4(NGX_LOG_DEBUG_EVENT, pc->log, 0,
"zmq_connect: lazily connected to tcp://%V,"
" zmq:%p fd:%d #%d", pc->name, zmq, fd, c->number);
if (ngx_add_conn) {
/* rtsig */
if (ngx_add_conn(c) == NGX_ERROR) {
goto failed;
}
} else {
if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
/* kqueue, epoll */
if (ngx_add_event(rev, NGX_READ_EVENT, NGX_CLEAR_EVENT) != NGX_OK) {
goto failed;
}
} else {
/* select, poll, /dev/poll */
if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT) != NGX_OK) {
goto failed;
}
}
}
/*
* ZeroMQ assumes that new socket is read-ready (but it really isn't)
* and it won't notify us about any new events if we don't fail to read
* from it first. Sigh.
*/
rev->ready = 1;
wev->ready = 1;
return NGX_OK;
failed:
ngx_free_connection(c);
c->fd = (ngx_socket_t) -1;
failed_zmq:
if (zmq_close(zmq) == -1) {
ngx_zeromq_log_error(pc->log, "zmq_close()");
}
return NGX_ERROR;
}
ngx_int_t
ngx_zeromq_connect(ngx_peer_connection_t *pc)
{
ngx_zeromq_connection_t *zc = pc->data;
ngx_zeromq_endpoint_t *zep;
ngx_connection_t *c;
ngx_event_t *rev, *wev;
void *zmq;
int fd, zero;
size_t fdsize;
ngx_uint_t i;
zep = zc->endpoint;
zmq = zmq_socket(ngx_zeromq_ctx, zep->type->value);
if (zmq == NULL) {
ngx_log_error(NGX_LOG_ALERT, pc->log, 0,
"zmq_socket(%V) failed (%d: %s)",
&zep->type->name, ngx_errno, zmq_strerror(ngx_errno));
return NGX_ERROR;
}
fdsize = sizeof(int);
if (zmq_getsockopt(zmq, ZMQ_FD, &fd, &fdsize) == -1) {
ngx_zeromq_log_error(pc->log, "zmq_getsockopt(ZMQ_FD)");
goto failed_zmq;
}
zero = 0;
if (zmq_setsockopt(zmq, ZMQ_LINGER, &zero, sizeof(int)) == -1) {
ngx_zeromq_log_error(pc->log, "zmq_setsockopt(ZMQ_LINGER)");
goto failed_zmq;
}
c = ngx_get_connection(fd, pc->log);
if (c == NULL) {
goto failed_zmq;
}
c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1);
c->recv = ngx_zeromq_recv;
c->send = NULL;
c->recv_chain = ngx_zeromq_recv_chain;
c->send_chain = ngx_zeromq_send_chain;
/* This won't fly with ZeroMQ */
c->sendfile = 0;
c->tcp_nopush = NGX_TCP_NOPUSH_DISABLED;
c->tcp_nodelay = NGX_TCP_NODELAY_DISABLED;
c->log_error = pc->log_error;
rev = c->read;
wev = c->write;
rev->data = zc;
wev->data = zc;
rev->handler = ngx_zeromq_event_handler;
wev->handler = ngx_zeromq_event_handler;
rev->log = pc->log;
wev->log = pc->log;
pc->connection = &zc->connection;
zc->connection_ptr = c;
memcpy(&zc->connection, c, sizeof(ngx_connection_t));
zc->socket = zmq;
if (zep->type->can_send) {
zc->send = zc;
}
if (zep->type->can_recv) {
zc->recv = zc;
}
if (pc->local) {
ngx_log_error(NGX_LOG_WARN, pc->log, 0,
"zmq_connect: binding to local address is not supported");
}
if (zep->bind) {
if (zep->rand) {
for (i = 0; ; i++) {
ngx_zeromq_randomized_endpoint_regen(&zep->addr);
if (zmq_bind(zmq, (const char *) zep->addr.data) == -1) {
if (ngx_errno == NGX_EADDRINUSE && i < 65535) {
continue;
}
ngx_zeromq_log_error(pc->log, "zmq_bind()");
goto failed;
}
break;
}
} else {
if (zmq_bind(zmq, (const char *) zep->addr.data) == -1) {
ngx_zeromq_log_error(pc->log, "zmq_bind()");
goto failed;
}
}
} else {
if (zmq_connect(zmq, (const char *) zep->addr.data) == -1) {
ngx_zeromq_log_error(pc->log, "zmq_connect()");
goto failed;
}
}
ngx_log_debug7(NGX_LOG_DEBUG_EVENT, pc->log, 0,
"zmq_connect: %s to %V (%V), fd:%d #%d zc:%p zmq:%p",
zep->bind ? "bound" : "lazily connected",
&zep->addr, &zep->type->name, fd, c->number, zc, zmq);
if (ngx_add_conn) {
/* rtsig */
if (ngx_add_conn(c) == NGX_ERROR) {
goto failed;
}
} else {
if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
/* kqueue, epoll */
if (ngx_add_event(rev, NGX_READ_EVENT, NGX_CLEAR_EVENT) != NGX_OK) {
goto failed;
}
} else {
/* select, poll, /dev/poll */
if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT) != NGX_OK) {
goto failed;
}
}
}
/*
* ZeroMQ assumes that new socket is read-ready (but it really isn't)
* and it won't notify us about any new events if we don't fail to read
* from it first. Sigh.
*/
rev->ready = 1;
wev->ready = zep->type->can_send;
return NGX_OK;
failed:
ngx_free_connection(c);
c->fd = (ngx_socket_t) -1;
pc->connection = NULL;
zc->socket = NULL;
failed_zmq:
if (zmq_close(zmq) == -1) {
ngx_zeromq_log_error(pc->log, "zmq_close()");
}
return NGX_ERROR;
}
static void
ngx_http_lua_abort_pending_timers(ngx_event_t *ev)
{
ngx_int_t i, n;
ngx_event_t **events;
ngx_connection_t *c, *saved_c = NULL;
ngx_rbtree_node_t *cur, *prev, *next, *sentinel;
ngx_http_lua_timer_ctx_t *tctx;
ngx_http_lua_main_conf_t *lmcf;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"lua abort pending timers HERE");
c = ev->data;
lmcf = c->data;
dd("lua connection fd: %d", (int) c->fd);
if (!c->close) {
return;
}
c->read->closed = 1;
c->write->closed = 1;
/* we temporarily use a valid fd (0) to make ngx_free_connection happy */
c->fd = 0;
if (ngx_cycle->files) {
saved_c = ngx_cycle->files[0];
}
ngx_free_connection(c);
c->fd = -1;
if (ngx_cycle->files) {
ngx_cycle->files[0] = saved_c;
}
if (lmcf->pending_timers == 0) {
return;
}
/* expire pending timers immediately */
sentinel = ngx_event_timer_rbtree.sentinel;
prev = NULL;
cur = ngx_event_timer_rbtree.root;
events = ngx_pcalloc(ngx_cycle->pool,
lmcf->pending_timers * sizeof(ngx_event_t));
if (events == NULL) {
return;
}
n = 0;
dd("root: %p, root parent: %p, sentinel: %p", cur, cur->parent, sentinel);
while (lmcf->pending_timers > n) {
if (cur == sentinel || cur == NULL) {
ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
"lua pending timer counter got out of sync: %i",
lmcf->pending_timers);
break;
}
if (prev == cur->parent) {
next = cur->left;
if (next == sentinel) {
ev = (ngx_event_t *)
((char *) cur - offsetof(ngx_event_t, timer));
if (ev->handler == ngx_http_lua_timer_handler) {
dd("found node: %p", cur);
events[n++] = ev;
}
next = (cur->right != sentinel) ? cur->right : cur->parent;
}
} else if (prev == cur->left) {
ev = (ngx_event_t *)
((char *) cur - offsetof(ngx_event_t, timer));
if (ev->handler == ngx_http_lua_timer_handler) {
dd("found node 2: %p", cur);
events[n++] = ev;
}
next = (cur->right != sentinel) ? cur->right : cur->parent;
} else if (prev == cur->right) {
next = cur->parent;
} else {
next = NULL;
}
prev = cur;
cur = next;
}
for (i = 0; i < n; i++) {
ev = events[i];
ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer);
#if (NGX_DEBUG)
ev->timer.left = NULL;
ev->timer.right = NULL;
ev->timer.parent = NULL;
#endif
ev->timer_set = 0;
ev->timedout = 1;
tctx = ev->data;
tctx->premature = 1;
ev->handler(ev);
}
if (lmcf->pending_timers) {
ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
"lua pending timer counter got out of sync: %i",
lmcf->pending_timers);
}
}
static ngx_int_t
ngx_http_lua_udp_connect(ngx_udp_connection_t *uc)
{
int rc;
ngx_int_t event;
ngx_event_t *rev, *wev;
ngx_socket_t s;
ngx_connection_t *c;
s = ngx_socket(uc->sockaddr->sa_family, SOCK_DGRAM, 0);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, &uc->log, 0, "UDP socket %d", s);
if (s == -1) {
ngx_log_error(NGX_LOG_ALERT, &uc->log, ngx_socket_errno,
ngx_socket_n " failed");
return NGX_ERROR;
}
c = ngx_get_connection(s, &uc->log);
if (c == NULL) {
if (ngx_close_socket(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, &uc->log, ngx_socket_errno,
ngx_close_socket_n "failed");
}
return NGX_ERROR;
}
if (ngx_nonblocking(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, &uc->log, ngx_socket_errno,
ngx_nonblocking_n " failed");
ngx_free_connection(c);
if (ngx_close_socket(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, &uc->log, ngx_socket_errno,
ngx_close_socket_n " failed");
}
return NGX_ERROR;
}
rev = c->read;
wev = c->write;
rev->log = &uc->log;
wev->log = &uc->log;
uc->connection = c;
c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1);
#if (NGX_THREADS)
/* TODO: lock event when call completion handler */
rev->lock = &c->lock;
wev->lock = &c->lock;
rev->own_lock = &c->lock;
wev->own_lock = &c->lock;
#endif
#if (NGX_HTTP_LUA_HAVE_SO_PASSCRED)
if (uc->sockaddr->sa_family == AF_UNIX) {
struct sockaddr addr;
addr.sa_family = AF_UNIX;
/* just to make valgrind happy */
ngx_memzero(addr.sa_data, sizeof(addr.sa_data));
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, &uc->log, 0, "datagram unix "
"domain socket autobind");
if (bind(uc->connection->fd, &addr, sizeof(sa_family_t)) != 0) {
ngx_log_error(NGX_LOG_CRIT, &uc->log, ngx_socket_errno,
"bind() failed");
return NGX_ERROR;
}
}
#endif
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, &uc->log, 0,
"connect to %V, fd:%d #%d", &uc->server, s, c->number);
rc = connect(s, uc->sockaddr, uc->socklen);
/* TODO: aio, iocp */
if (rc == -1) {
ngx_log_error(NGX_LOG_CRIT, &uc->log, ngx_socket_errno,
"connect() failed");
return NGX_ERROR;
}
/* UDP sockets are always ready to write */
wev->ready = 1;
if (ngx_add_event) {
event = (ngx_event_flags & NGX_USE_CLEAR_EVENT) ?
/* kqueue, epoll */ NGX_CLEAR_EVENT:
/* select, poll, /dev/poll */ NGX_LEVEL_EVENT;
/* eventport event type has no meaning: oneshot only */
if (ngx_add_event(rev, NGX_READ_EVENT, event) != NGX_OK) {
return NGX_ERROR;
}
} else {
/* rtsig */
if (ngx_add_conn(c) == NGX_ERROR) {
return NGX_ERROR;
}
}
return NGX_OK;
}
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 (!c->shared) {
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 (c->read->posted) {
ngx_delete_posted_event(c->read);
}
if (c->write->posted) {
ngx_delete_posted_event(c->write);
}
c->read->closed = 1;
c->write->closed = 1;
ngx_reusable_connection(c, 0);
log_error = c->log_error;
ngx_free_connection(c);
fd = c->fd;
c->fd = (ngx_socket_t) -1;
if (c->shared) {
return;
}
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;
}
ngx_log_error(level, c->log, err, ngx_close_socket_n " %d failed", fd);
}
}
ngx_int_t
ngx_event_connect_peer(ngx_peer_connection_t *pc)
{ //Here,we initilize a connection!!!
int rc;
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;
//Here,very important, this handler is use to get a select handler!!
/*
For ip_hash module,will set the get handler!!!
r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer;
r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer;
*/
//will stored the really backend ip_addr in the pc!!
rc = pc->get(pc, pc->data);
if (rc != NGX_OK) {
return rc;
}
//Here,Do the socket operation! alloc a socket_fd
s = ngx_socket(pc->sockaddr->sa_family, SOCK_STREAM, 0);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, 0, "socket %d", s);
if (s == -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;
}
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 (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 (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;
}
}
//########################### Here set the connection data's read write handler!!!
c->recv = ngx_recv;
c->send = ngx_send;
c->recv_chain = ngx_recv_chain;
c->send_chain = ngx_send_chain;
c->sendfile = 1;
c->log_error = pc->log_error;
if (pc->sockaddr->sa_family != AF_INET) {
c->tcp_nopush = NGX_TCP_NOPUSH_DISABLED;
c->tcp_nodelay = NGX_TCP_NODELAY_DISABLED;
#if (NGX_SOLARIS)
/* Solaris's sendfilev() supports AF_NCA, AF_INET, and AF_INET6 */
c->sendfile = 0;
#endif
}
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);
#if (NGX_THREADS)
/* TODO: lock event when call completion handler */
rev->lock = pc->lock;
wev->lock = pc->lock;
rev->own_lock = &c->lock;
wev->own_lock = &c->lock;
#endif
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 #%d", pc->name, s, c->number);
//########################## Here,doing the really connect operation
rc = connect(s, pc->sockaddr, pc->socklen);
if (rc == -1) {
err = ngx_socket_errno;
if (err != NGX_EINPROGRESS
#if (NGX_WIN32)
/* Winsock returns WSAEWOULDBLOCK (NGX_EAGAIN) */
&& err != NGX_EAGAIN
#endif
)
{
if (err == NGX_ECONNREFUSED
#if (NGX_LINUX)
/*
* Linux returns EAGAIN instead of ECONNREFUSED
* for unix sockets if listen queue is full
*/
|| 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);
return NGX_DECLINED;
}
}
if (ngx_add_conn) {
if (rc == -1) {
/* NGX_EINPROGRESS */
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_AIO_EVENT) {
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, ngx_socket_errno,
"connect(): %d", rc);
/* aio, iocp */
if (ngx_blocking(s) == -1) {
ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
ngx_blocking_n " failed");
goto failed;
}
/*
* FreeBSD's aio allows to post an operation on non-connected socket.
* NT does not support it.
*
* TODO: check in Win32, etc. As workaround we can use NGX_ONESHOT_EVENT
*/
rev->ready = 1;
wev->ready = 1;
return NGX_OK;
}
if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
/* kqueue */
event = NGX_CLEAR_EVENT;
} else {
/* select, poll, /dev/poll */
event = NGX_LEVEL_EVENT;
}
//##########################################Very important!
//##########################################add the connection read event!!
if (ngx_add_event(rev, NGX_READ_EVENT, event) != NGX_OK) {
goto failed;
}
if (rc == -1) {
/* NGX_EINPROGRESS */
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; //Means the connection is ready to write!
return NGX_OK;
failed:
ngx_free_connection(c);
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;
}
static ngx_int_t
ngx_send_radius_request( ngx_http_request_t *r, radius_req_queue_node_t* prev_req ) {
ngx_log_error( NGX_LOG_ERR, r->connection->log, 0, "ngx_send_radius_request 0x%xl", r );
ngx_http_auth_radius_main_conf_t* conf = ngx_http_get_module_main_conf( r, ngx_http_auth_radius_module );
ngx_http_core_loc_conf_t *clcf;
clcf = ngx_http_get_module_loc_conf( r, ngx_http_core_module );
ngx_http_auth_radius_ctx_t* ctx = ngx_http_get_module_ctx( r, ngx_http_auth_radius_module );
if ( ctx == NULL )
abort(); // TODO
radius_str_t user = { RADIUS_STR_FROM_NGX_STR_INITIALIZER( r->headers_in.user ) };
radius_str_t passwd = { RADIUS_STR_FROM_NGX_STR_INITIALIZER( r->headers_in.passwd ) };
radius_req_queue_node_t* n;
n = radius_send_request( prev_req, &user, &passwd, clcf->error_log );
if ( n == NULL ) {
abort(); // TODO
}
ngx_http_auth_radius_main_conf_t* lconf = ngx_http_get_module_loc_conf( r, ngx_http_auth_radius_module );
ngx_add_timer( r->connection->read, lconf->radius_timeout );
radius_server_t* rs;
rs = get_server_by_req( n );
ngx_log_error( NGX_LOG_ERR, r->connection->log, 0, "ngx_send_radius_request rs: %d, assign 0x%xl to 0x%xl, id: %d", rs->id, r, n, n->ident );
n->data = r;
ctx->n = n;
ngx_connection_t* c = rs->data;
ngx_event_t* rev;
if ( c == NULL ) {
c = ngx_get_connection( rs->s, conf->log );
if ( c == NULL ) {
ngx_log_error( NGX_LOG_ERR, r->connection->log, 0, "ngx_send_radius_request: ngx_get_connection" );
if (ngx_close_socket( rs->s ) == -1)
ngx_log_error( NGX_LOG_ERR, r->connection->log, 0, "ngx_send_radius_request: ngx_close_socket" );
return NGX_ERROR;
}
if ( ngx_nonblocking( rs->s ) == -1 ) {
ngx_log_error( NGX_LOG_ERR, r->connection->log, 0, "ngx_send_radius_request: ngx_nonblocking" );
ngx_free_connection( c );
if (ngx_close_socket( rs->s ) == -1)
ngx_log_error( NGX_LOG_ERR, r->connection->log, 0, "ngx_send_radius_request: ngx_close_socket" );
return NGX_ERROR;
}
rs->data = c;
c->data = rs;
rev = c->read;
rev->handler = radius_read_handler;
rev->log = clcf->error_log;
rs->log = clcf->error_log;
if ( ngx_add_event( rev, NGX_READ_EVENT, NGX_LEVEL_EVENT ) != NGX_OK ) {
ngx_log_error( NGX_LOG_ERR, r->connection->log, 0, "ngx_send_radius_request: ngx_add_event" );
return NGX_ERROR;
}
c->number = ngx_atomic_fetch_add( ngx_connection_counter, 1 );
}
return NGX_OK;
}
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 == -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;
if (c->single_connection) {
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);
}
}
/*
ngx_http_close_request方法是更高层的用于关闭请求的方法，当然，HTTP模块一般也不会直接调用它的。在上面几节中反复提到的引用计数，
就是由ngx_http_close_request方法负责检测的，同时它会在引用计数清零时正式调用ngx_http_free_request方法和ngx_http_close_connection(ngx_close_connection)
方法来释放请求、关闭连接,见ngx_http_close_request
*/
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;
}
/*
首先将连接的读/写事件从定时器中取出。实际上就是检查读/写事件的time_set标志位，如果为1，则证明事件在定时器中，那么需要调
用ngx_del_timer方法把事件从定时器中移除。
*/
if (c->read->timer_set) {
ngx_del_timer(c->read, NGX_FUNC_LINE);
}
if (c->write->timer_set) {
ngx_del_timer(c->write, NGX_FUNC_LINE);
}
/*
调用ngx_del_conn宏（或者ngx_del_event宏）将读/写事件从epoll中移除。实际上就是调用ngx_event_actions_t接口
中的del_conn方法，当事件模块是epoll模块时，就是从epoll中移除这个连接的读/写事件。同时，如果这个事件在ngx_posted_accept_events或
者ngx_posted_events队列中，还需要调用ngx_delete_posted_event宏把事件从post事件队列中移除。
*/
if (ngx_del_conn) { //ngx_epoll_del_connection
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); //ngx_epoll_del_event
}
if (c->write->active || c->write->disabled) {
ngx_del_event(c->write, NGX_WRITE_EVENT, NGX_CLOSE_EVENT);
}
}
if (c->read->posted) {
ngx_delete_posted_event(c->read);
}
if (c->write->posted) {
ngx_delete_posted_event(c->write);
}
c->read->closed = 1;
c->write->closed = 1;
ngx_reusable_connection(c, 0);
log_error = c->log_error;
/*
调用ngx_free_connection方法把表示连接的ngx_connection-t结构体归还给ngx_
cycle_t核心结构体的空闲连接池free connections。
*/
ngx_free_connection(c);
fd = c->fd;
c->fd = (ngx_socket_t) -1;
ngx_log_debugall(ngx_cycle->log, 0, "close socket:%d", fd);
//调用系统提供的close方法关闭这个TCP连接套接字。
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 */
//由于c已经在前面释放了，因此不能再用C->log了
ngx_log_error(level, ngx_cycle->log, err,
ngx_close_socket_n " %d failed", fd);
}
}
void
ngx_zeromq_close(ngx_zeromq_connection_t *zc)
{
ngx_connection_t *c;
c = &zc->connection;
if (c->fd == -1) {
return;
}
ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
"zmq_close: fd:%d #%d zc:%p zmq:%p",
c->fd, c->number, zc, zc->socket);
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 (nginx_version >= 1007005)
if (c->read->posted) {
#else
if (c->read->prev) {
#endif
ngx_delete_posted_event(c->read);
}
#if (nginx_version >= 1007005)
if (c->write->posted) {
#else
if (c->write->prev) {
#endif
ngx_delete_posted_event(c->write);
}
c->read->closed = 1;
c->write->closed = 1;
ngx_reusable_connection(zc->connection_ptr, 0);
ngx_free_connection(zc->connection_ptr);
c->fd = (ngx_socket_t) -1;
zc->connection_ptr->fd = (ngx_socket_t) -1;
if (zmq_close(zc->socket) == -1) {
ngx_zeromq_log_error(ngx_cycle->log, "zmq_close()");
}
zc->socket = NULL;
}
static void
ngx_zeromq_event_handler(ngx_event_t *ev)
{
ngx_zeromq_connection_t *zc;
ngx_connection_t *c;
void *zmq;
int events;
size_t esize;
/*
* ZeroMQ notifies us about new events in edge-triggered fashion
* by changing state of the notification socket to read-ready.
*
* Write-readiness doesn't indicate anything and can be ignored.
*/
if (ev->write) {
return;
}
zc = ev->data;
zc = zc->send;
esize = sizeof(int);
#if (NGX_DEBUG)
if (zc->recv != zc->send) {
zmq = zc->request_sent ? zc->socket : zc->recv->socket;
if (zmq_getsockopt(zmq, ZMQ_EVENTS, &events, &esize) == -1) {
ngx_zeromq_log_error(ev->log, "zmq_getsockopt(ZMQ_EVENTS)");
ev->error = 1;
return;
}
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"zmq_event: %s:%d (ignored)",
zc->request_sent ? "send" : "recv", events);
}
#endif
zmq = zc->request_sent ? zc->recv->socket : zc->socket;
if (zmq_getsockopt(zmq, ZMQ_EVENTS, &events, &esize) == -1) {
ngx_zeromq_log_error(ev->log, "zmq_getsockopt(ZMQ_EVENTS)");
ev->error = 1;
return;
}
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"zmq_event: %s:%d",
zc->request_sent ? "recv" : "send", events);
c = &zc->connection;
if (zc->request_sent) {
c->read->ready = events & ZMQ_POLLIN ? 1 : 0;
if (c->read->ready) {
zc->handler(c->read);
}
} else {
c->write->ready = events & ZMQ_POLLOUT ? 1 : 0;
if (c->write->ready) {
zc->handler(c->write);
}
}
}
static ssize_t
ngx_zeromq_sendmsg(void *zmq, ngx_event_t *ev, zmq_msg_t *msg, int flags)
{
size_t size;
size = zmq_msg_size(msg);
for (;;) {
if (zmq_msg_send(msg, zmq, ZMQ_DONTWAIT|flags) == -1) {
if (ngx_errno == NGX_EAGAIN) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"zmq_send: not ready");
ev->ready = 0;
return NGX_AGAIN;
}
if (ngx_errno == NGX_EINTR) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"zmq_send: interrupted");
ev->ready = 0;
continue;
}
ngx_zeromq_log_error(ev->log, "zmq_msg_send()");
ev->error = 1;
return NGX_ERROR;
}
break;
}
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"zmq_send: %uz eom:%d", size, flags != ZMQ_SNDMORE);
return size;
}
static void
ngx_http_lua_abort_pending_timers(ngx_event_t *ev)
{
ngx_int_t i, n;
ngx_event_t **events;
ngx_connection_t *c, *saved_c = NULL;
ngx_rbtree_node_t *cur, *prev, *next, *sentinel, *temp;
ngx_http_lua_timer_ctx_t *tctx;
ngx_http_lua_main_conf_t *lmcf;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"lua abort pending timers");
c = ev->data;
lmcf = c->data;
dd("lua connection fd: %d", (int) c->fd);
if (!c->close) {
return;
}
c->read->closed = 1;
c->write->closed = 1;
/* we temporarily use a valid fd (0) to make ngx_free_connection happy */
c->fd = 0;
if (ngx_cycle->files) {
saved_c = ngx_cycle->files[0];
}
ngx_free_connection(c);
c->fd = (ngx_socket_t) -1;
if (ngx_cycle->files) {
ngx_cycle->files[0] = saved_c;
}
if (lmcf->pending_timers == 0) {
return;
}
/* expire pending timers immediately */
sentinel = ngx_event_timer_rbtree.sentinel;
cur = ngx_event_timer_rbtree.root;
/* XXX nginx does not guarentee the parent of root is meaningful,
* so we temporarily override it to simplify tree traversal. */
temp = cur->parent;
cur->parent = NULL;
prev = NULL;
events = ngx_pcalloc(ngx_cycle->pool,
lmcf->pending_timers * sizeof(ngx_event_t));
if (events == NULL) {
return;
}
n = 0;
dd("root: %p, root parent: %p, sentinel: %p", cur, cur->parent, sentinel);
while (n < lmcf->pending_timers) {
if (cur == sentinel || cur == NULL) {
ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
"lua pending timer counter got out of sync: %i",
lmcf->pending_timers);
break;
}
dd("prev: %p, cur: %p, cur parent: %p, cur left: %p, cur right: %p",
prev, cur, cur->parent, cur->left, cur->right);
if (prev == cur->parent) {
/* neither of the children has been accessed yet */
next = cur->left;
if (next == sentinel) {
ev = (ngx_event_t *)
((char *) cur - offsetof(ngx_event_t, timer));
if (ev->handler == ngx_http_lua_timer_handler) {
dd("found node: %p", cur);
events[n++] = ev;
}
next = (cur->right != sentinel) ? cur->right : cur->parent;
}
} else if (prev == cur->left) {
/* just accessed the left child */
ev = (ngx_event_t *)
((char *) cur - offsetof(ngx_event_t, timer));
if (ev->handler == ngx_http_lua_timer_handler) {
dd("found node 2: %p", cur);
events[n++] = ev;
}
next = (cur->right != sentinel) ? cur->right : cur->parent;
} else if (prev == cur->right) {
/* already accessed both children */
next = cur->parent;
} else {
/* not reacheable */
next = NULL;
}
prev = cur;
cur = next;
}
/* restore the old tree root's parent */
ngx_event_timer_rbtree.root->parent = temp;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"lua found %i pending timers to be aborted prematurely",
n);
for (i = 0; i < n; i++) {
ev = events[i];
ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer);
#if (NGX_DEBUG)
ev->timer.left = NULL;
ev->timer.right = NULL;
ev->timer.parent = NULL;
#endif
ev->timer_set = 0;
ev->timedout = 1;
tctx = ev->data;
tctx->premature = 1;
dd("calling timer handler prematurely");
ev->handler(ev);
}
#if 0
if (pending_timers) {
ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
"lua pending timer counter got out of sync: %i",
pending_timers);
}
#endif
}
