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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
ngx_os_io_t ngx_io;
ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle)
{
ngx_int_t i;
ngx_listening_t *ls;
struct sockaddr_in *addr_in;
ls = cycle->listening.elts;
for (i = 0; i < cycle->listening.nelts; i++) {
/* AF_INET only */
ls[i].sockaddr = ngx_palloc(cycle->pool, sizeof(struct sockaddr_in));
if (ls[i].sockaddr == NULL) {
return NGX_ERROR;
}
ls[i].socklen = sizeof(struct sockaddr_in);
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;
}
addr_in = (struct sockaddr_in *) ls[i].sockaddr;
if (addr_in->sin_family != AF_INET) {
ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_socket_errno,
"the inherited socket #%d has "
"unsupported family", ls[i].fd);
ls[i].ignore = 1;
continue;
}
ls[i].addr_text_max_len = INET_ADDRSTRLEN;
ls[i].addr_text.data = ngx_palloc(cycle->pool, ls[i].addr_text_max_len);
if (ls[i].addr_text.data == NULL) {
return NGX_ERROR;
}
/* STUB: autoconf & set sin_len in ls[i].sockaddr in ngx_http.c */
#if __FreeBSD__
addr_in->sin_len = 0;
#endif
ls[i].family = addr_in->sin_family;
ls[i].addr_text.len = ngx_sock_ntop(ls[i].family, ls[i].sockaddr,
ls[i].addr_text.data,
ls[i].addr_text_max_len);
if (ls[i].addr_text.len == 0) {
return NGX_ERROR;
}
}
return NGX_OK;
}
ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle)
{
int tries, failed, reuseaddr, i;
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: tries configurable */
for (tries = 10; 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 != -1) {
continue;
}
if (ls[i].inherited) {
/* TODO: close on exit */
/* TODO: nonblocking */
/* TODO: deferred accept */
continue;
}
s = ngx_socket(ls[i].family, ls[i].type, ls[i].protocol,
ls[i].flags);
if (s == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
ngx_socket_n " %s failed", ls[i].addr_text.data);
return NGX_ERROR;
}
#if (WIN32)
/*
* Winsock assignes a socket number divisible by 4
* so to find a connection we divide a socket number by 4.
*/
if (s % 4) {
ngx_log_error(NGX_LOG_EMERG, ls->log, 0,
ngx_socket_n " created socket %d", s);
return NGX_ERROR;
}
#endif
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) %s failed",
ls[i].addr_text.data);
return NGX_ERROR;
}
/* 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 " %s failed",
ls[i].addr_text.data);
return NGX_ERROR;
}
}
#if 0
if (ls[i].nonblocking) {
if (ngx_nonblocking(s) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
ngx_nonblocking_n " %s failed",
ls[i].addr_text.data);
return NGX_ERROR;
}
}
#endif
if (bind(s, ls[i].sockaddr, ls[i].socklen) == -1) {
err = ngx_socket_errno;
ngx_log_error(NGX_LOG_EMERG, log, err,
"bind() to %s failed", ls[i].addr_text.data);
if (err != NGX_EADDRINUSE)
return NGX_ERROR;
if (ngx_close_socket(s) == -1)
ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
ngx_close_socket_n " %s failed",
ls[i].addr_text.data);
failed = 1;
continue;
}
if (listen(s, ls[i].backlog) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
"listen() to %s failed", ls[i].addr_text.data);
return NGX_ERROR;
}
/* TODO: deferred accept */
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 can not bind()");
return NGX_ERROR;
}
return NGX_OK;
}
void ngx_close_listening_sockets(ngx_cycle_t *cycle)
{
ngx_int_t i;
ngx_socket_t fd;
ngx_listening_t *ls;
if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
return;
}
ls = cycle->listening.elts;
for (i = 0; i < cycle->listening.nelts; i++) {
fd = ls[i].fd;
#if (WIN32)
/*
* Winsock assignes a socket number divisible by 4
* so to find a connection we divide a socket number by 4.
*/
fd /= 4;
#endif
ngx_del_event(&cycle->read_events[fd], NGX_READ_EVENT, NGX_CLOSE_EVENT);
if (ngx_close_socket(ls[i].fd) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
ngx_close_socket_n " %s failed",
ls[i].addr_text.data);
}
cycle->connections[fd].fd = -1;
}
}
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