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
39 static server_t *listeners[1024];
40 static int listener_count = 0;
43 static server_t* server_new(void)
45 server_t* server = p_new(server_t, 1);
50 static void server_delete(server_t **server)
53 if ((*server)->fd >= 0) {
56 if ((*server)->data && (*server)->clear_data) {
57 (*server)->clear_data(&(*server)->data);
59 buffer_wipe(&(*server)->ibuf);
60 buffer_wipe(&(*server)->obuf);
65 static void server_shutdown(void)
67 for (int i = 0 ; i < listener_count ; ++i) {
68 server_delete(&listeners[i]);
72 module_exit(server_shutdown);
74 int start_server(int port, start_listener_t starter, delete_client_t deleter)
76 struct sockaddr_in addr = {
77 .sin_family = AF_INET,
78 .sin_addr = { htonl(INADDR_LOOPBACK) },
84 addr.sin_port = htons(port);
85 sock = tcp_listen_nonblock((const struct sockaddr *)&addr, sizeof(addr));
100 tmp->listener = true;
102 tmp->clear_data = deleter;
103 epoll_register(sock, EPOLLIN, tmp);
104 listeners[listener_count++] = tmp;
108 static int start_client(server_t *server, start_client_t starter,
109 delete_client_t deleter)
115 sock = accept_nonblock(server->fd);
122 data = starter(server);
132 tmp->clear_data = deleter;
133 epoll_register(sock, EPOLLIN, tmp);
137 int server_loop(start_client_t starter, delete_client_t deleter,
138 run_client_t runner, refresh_t refresh, void* config) {
140 struct epoll_event evts[1024];
143 if (sighup && refresh) {
145 if (!refresh(config)) {
146 crit("error while refreshing configuration");
151 n = epoll_select(evts, countof(evts), -1);
153 if (errno != EAGAIN && errno != EINTR) {
154 UNIXERR("epoll_wait");
161 server_t *d = evts[n].data.ptr;
164 (void)start_client(d, starter, deleter);
168 if (evts[n].events & EPOLLIN) {
169 if (runner(d, config) < 0) {
175 if ((evts[n].events & EPOLLOUT) && d->obuf.len) {
176 if (buffer_write(&d->obuf, d->fd) < 0) {
181 epoll_modify(d->fd, EPOLLIN, d);