nginx/src/core/nginx.c

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#include <nginx.h>
#include <ngx_config.h>
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#include <ngx_string.h>
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#include <ngx_errno.h>
#include <ngx_time.h>
#include <ngx_log.h>
#include <ngx_alloc.h>
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#include <ngx_array.h>
#include <ngx_socket.h>
#include <ngx_server.h>
#include <ngx_connection.h>
#include <ngx_listen.h>
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#include <ngx_conf_file.h>
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/* STUB */
#include <ngx_http.h>
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/* */
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static void ngx_set_signals(ngx_log_t *log);
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static void ngx_open_listening_sockets(ngx_log_t *log);
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/* STUB */
int ngx_max_conn = 512;
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ngx_server_t ngx_server;
/* */
ngx_log_t ngx_log;
ngx_pool_t *ngx_pool;
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int ngx_connection_counter;
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ngx_array_t *ngx_listening_sockets;
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int main(int argc, char *const *argv)
{
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ngx_str_t conf_file;
ngx_conf_t conf;
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/* STUB */
ngx_log.log_level = NGX_LOG_DEBUG;
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ngx_pool = ngx_create_pool(16 * 1024, &ngx_log);
/* */
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#if !(WIN32)
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ngx_set_signals(&ngx_log);
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#endif
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ngx_init_sockets(&ngx_log);
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/* TODO: read config */
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#if 1
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ngx_memzero(&conf, sizeof(ngx_conf_t));
ngx_test_null(conf.args,
ngx_create_array(ngx_pool, 10, sizeof(ngx_str_t)), 1);
conf.pool = ngx_pool;
conf.log = &ngx_log;
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conf.type = NGX_CORE_MODULE_TYPE;
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conf_file.len = sizeof("nginx.conf") - 1;
conf_file.data = "nginx.conf";
ngx_conf_parse(&conf, &conf_file);
#endif
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ngx_test_null(ngx_listening_sockets,
ngx_create_array(ngx_pool, 10, sizeof(ngx_listen_t)), 1);
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/* STUB */
/* TODO: init chain of global modules (like ngx_http.c),
they would init its modules and ngx_listening_sockets */
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ngx_http_init(ngx_pool, &ngx_log);
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ngx_open_listening_sockets(&ngx_log);
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/* TODO: daemon */
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/* TODO: fork */
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ngx_pre_thread(ngx_listening_sockets, ngx_pool, &ngx_log);
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/* TODO: threads */
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/* STUB */
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ngx_worker(&ngx_log);
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return 0;
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}
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#if !(WIN32)
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static void ngx_set_signals(ngx_log_t *log)
{
struct sigaction sa;
ngx_memzero(&sa, sizeof(struct sigaction));
sa.sa_handler = SIG_IGN;
sigemptyset(&sa.sa_mask);
if (sigaction(SIGPIPE, &sa, NULL) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
"sigaction(SIGPIPE, SIG_IGN) failed");
exit(1);
}
}
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#endif
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static void ngx_open_listening_sockets(ngx_log_t *log)
{
int times, failed, reuseaddr, i;
ngx_err_t err;
ngx_socket_t s;
ngx_listen_t *ls;
reuseaddr = 1;
for (times = 10; times; times--) {
failed = 0;
/* for each listening socket */
ls = (ngx_listen_t *) ngx_listening_sockets->elts;
for (i = 0; i < ngx_listening_sockets->nelts; i++) {
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if (ls[i].done)
continue;
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if (ls[i].inherited) {
/* TODO: close on exit */
/* TODO: nonblocking */
/* TODO: deferred accept */
ls[i].done = 1;
continue;
}
s = ngx_socket(ls[i].family, ls[i].type, ls[i].protocol,
ls[i].flags);
if (s == -1) {
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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ngx_socket_n " %s falied", ls[i].addr_text.data);
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exit(1);
}
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if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
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(const void *) &reuseaddr, sizeof(int)) == -1) {
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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"setsockopt(SO_REUSEADDR) %s failed",
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ls[i].addr_text.data);
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exit(1);
}
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/* TODO: close on exit */
if (ls[i].nonblocking) {
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if (ngx_nonblocking(s) == -1) {
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
ngx_nonblocking_n " %s failed",
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ls[i].addr_text.data);
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exit(1);
}
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}
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if (bind(s, ls[i].sockaddr, ls[i].socklen) == -1) {
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err = ngx_socket_errno;
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ngx_log_error(NGX_LOG_EMERG, log, err,
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"bind() to %s failed", ls[i].addr_text.data);
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if (err != NGX_EADDRINUSE)
exit(1);
if (ngx_close_socket(s) == -1)
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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ngx_close_socket_n " %s failed",
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ls[i].addr_text.data);
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failed = 1;
continue;
}
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if (listen(s, ls[i].backlog) == -1) {
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ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
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"listen() to %s failed", ls[i].addr_text.data);
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exit(1);
}
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/* TODO: deferred accept */
ls[i].fd = s;
ls[i].done = 1;
}
if (!failed)
break;
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ngx_log_error(NGX_LOG_NOTICE, log, 0,
"try again to bind() after 500ms");
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ngx_msleep(500);
}
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if (failed) {
ngx_log_error(NGX_LOG_EMERG, log, 0, "can not bind(), exiting");
exit(1);
}
}