1 /******************************************************************************/
2 /* pfixtools: a collection of postfix related tools */
4 /* ________________________________________________________________________ */
6 /* Redistribution and use in source and binary forms, with or without */
7 /* modification, are permitted provided that the following conditions */
10 /* 1. Redistributions of source code must retain the above copyright */
11 /* notice, this list of conditions and the following disclaimer. */
12 /* 2. Redistributions in binary form must reproduce the above copyright */
13 /* notice, this list of conditions and the following disclaimer in the */
14 /* documentation and/or other materials provided with the distribution. */
15 /* 3. The names of its contributors may not be used to endorse or promote */
16 /* products derived from this software without specific prior written */
19 /* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND */
20 /* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE */
21 /* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
22 /* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS */
23 /* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR */
24 /* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF */
25 /* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS */
26 /* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN */
27 /* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) */
28 /* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF */
29 /* THE POSSIBILITY OF SUCH DAMAGE. */
30 /******************************************************************************/
33 * Copyright © 2008 Florent Bruneau
40 static PA(server_t) listeners = ARRAY_INIT;
41 static PA(server_t) server_pool = ARRAY_INIT;
43 static server_t* server_new(void)
45 server_t* server = p_new(server_t, 1);
50 static void server_wipe(server_t *server)
52 server->listener = false;
53 if (server->fd >= 0) {
54 epoll_unregister(server->fd);
58 if (server->data && server->clear_data) {
59 server->clear_data(&server->data);
63 static void server_delete(server_t **server)
66 buffer_wipe(&(*server)->ibuf);
67 buffer_wipe(&(*server)->obuf);
73 static server_t* server_acquire(void)
75 if (server_pool.len != 0) {
76 return array_elt(server_pool, --server_pool.len);
82 void server_release(server_t *server)
85 array_add(server_pool, server);
88 static void server_shutdown(void)
90 printf("Server shutdown");
91 array_deep_wipe(listeners, server_delete);
92 array_deep_wipe(server_pool, server_delete);
95 module_exit(server_shutdown);
97 int start_server(int port, start_listener_t starter, delete_client_t deleter)
99 struct sockaddr_in addr = {
100 .sin_family = AF_INET,
101 .sin_addr = { htonl(INADDR_LOOPBACK) },
107 addr.sin_port = htons(port);
108 sock = tcp_listen_nonblock((const struct sockaddr *)&addr, sizeof(addr));
121 tmp = server_acquire();
123 tmp->listener = true;
126 tmp->clear_data = deleter;
127 epoll_register(sock, EPOLLIN, tmp);
128 array_add(listeners, tmp);
132 static int start_client(server_t *server, start_client_t starter,
133 run_client_t runner, delete_client_t deleter)
139 sock = accept_nonblock(server->fd);
146 data = starter(server);
153 tmp = server_acquire();
154 tmp->listener = false;
158 tmp->clear_data = deleter;
159 epoll_register(sock, EPOLLIN, tmp);
163 server_t *server_register(int fd, run_client_t runner, void *data)
169 server_t *tmp = server_acquire();
170 tmp->listener = false;
174 tmp->clear_data = NULL;
175 epoll_register(fd, EPOLLIN, tmp);
179 int server_loop(start_client_t starter, delete_client_t deleter,
180 run_client_t runner, refresh_t refresh, void* config)
182 info("entering processing loop");
184 struct epoll_event evts[1024];
187 if (sighup && refresh) {
189 info("refreshing...");
190 if (!refresh(config)) {
191 crit("error while refreshing configuration");
194 info("refresh done, processing loop restarts");
197 n = epoll_select(evts, countof(evts), -1);
199 if (errno != EAGAIN && errno != EINTR) {
200 UNIXERR("epoll_wait");
207 server_t *d = evts[n].data.ptr;
210 (void)start_client(d, starter, runner, deleter);
214 if ((evts[n].events & EPOLLOUT) && d->obuf.len) {
215 if (buffer_write(&d->obuf, d->fd) < 0) {
220 epoll_modify(d->fd, EPOLLIN, d);
224 if (evts[n].events & EPOLLIN) {
225 if (d->run(d, config) < 0) {
232 info("exit requested");