1 /* ====================================================================
2 * The Apache Software License, Version 1.1
4 * Copyright (c) 2000 The Apache Software Foundation. All rights
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
26 * 4. The names "Apache" and "Apache Software Foundation" must
27 * not be used to endorse or promote products derived from this
28 * software without prior written permission. For written
29 * permission, please contact apache@apache.org.
31 * 5. Products derived from this software may not be called "Apache",
32 * nor may "Apache" appear in their name, without prior written
33 * permission of the Apache Software Foundation.
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47 * ====================================================================
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>.
54 * Portions of this software are based upon public domain software
55 * originally written at the National Center for Supercomputing Applications,
56 * University of Illinois, Urbana-Champaign.
59 #include "apr_network_io.h"
62 #include "ap_config.h"
64 #include "http_config.h"
65 #include "ap_listen.h"
66 #include "apr_strings.h"
69 #include "mpm_common.h"
74 ap_listen_rec *ap_listeners;
75 static ap_listen_rec *old_listeners;
76 static int ap_listenbacklog;
77 static int send_buffer_size;
79 /* TODO: make_sock is just begging and screaming for APR abstraction */
80 static apr_status_t make_sock(apr_pool_t *p, ap_listen_rec *server)
82 apr_socket_t *s = server->sd;
88 apr_sockaddr_t *localsa;
90 apr_get_sockaddr(&localsa, APR_LOCAL, s);
91 apr_get_port(&port, localsa);
92 apr_get_ipaddr(&ipaddr, localsa);
93 apr_snprintf(addr, sizeof(addr), "address %s port %u", ipaddr,
96 stat = apr_getaddrinfo(&localsa, ipaddr, APR_INET, port, 0, p);
97 if (stat != APR_SUCCESS) {
98 ap_log_error(APLOG_MARK, APLOG_CRIT, stat, NULL,
99 "make_sock: for %s/%hu, apr_getaddrinfo() failed",
105 stat = apr_setsocketopt(s, APR_SO_REUSEADDR, one);
106 if (stat != APR_SUCCESS && stat != APR_ENOTIMPL) {
107 ap_log_error(APLOG_MARK, APLOG_CRIT, stat, NULL,
108 "make_sock: for %s, setsockopt: (SO_REUSEADDR)", addr);
113 stat = apr_setsocketopt(s, APR_SO_KEEPALIVE, one);
114 if (stat != APR_SUCCESS && stat != APR_ENOTIMPL) {
115 ap_log_error(APLOG_MARK, APLOG_CRIT, stat, NULL,
116 "make_sock: for %s, setsockopt: (SO_KEEPALIVE)", addr);
122 * To send data over high bandwidth-delay connections at full
123 * speed we must force the TCP window to open wide enough to keep the
124 * pipe full. The default window size on many systems
125 * is only 4kB. Cross-country WAN connections of 100ms
126 * at 1Mb/s are not impossible for well connected sites.
127 * If we assume 100ms cross-country latency,
128 * a 4kB buffer limits throughput to 40kB/s.
130 * To avoid this problem I've added the SendBufferSize directive
131 * to allow the web master to configure send buffer size.
133 * The trade-off of larger buffers is that more kernel memory
134 * is consumed. YMMV, know your customers and your network!
136 * -John Heidemann <johnh@isi.edu> 25-Oct-96
138 * If no size is specified, use the kernel default.
140 if (send_buffer_size) {
141 stat = apr_setsocketopt(s, APR_SO_SNDBUF, send_buffer_size);
142 if (stat != APR_SUCCESS && stat != APR_ENOTIMPL) {
143 ap_log_error(APLOG_MARK, APLOG_WARNING, stat, NULL,
144 "make_sock: failed to set SendBufferSize for %s, "
145 "using default", addr);
146 /* not a fatal error */
150 #if DISABLE_NAGLE_INHERITED
151 ap_sock_disable_nagle(s);
154 if ((stat = apr_bind(s, localsa)) != APR_SUCCESS) {
155 ap_log_error(APLOG_MARK, APLOG_CRIT, stat, NULL,
156 "make_sock: could not bind to %s", addr);
161 if ((stat = apr_listen(s, ap_listenbacklog)) != APR_SUCCESS) {
162 ap_log_error(APLOG_MARK, APLOG_ERR, stat, NULL,
163 "make_sock: unable to listen for connections on %s", addr);
174 static apr_status_t close_listeners_on_exec(void *v)
178 for (lr = ap_listeners; lr; lr = lr->next) {
179 apr_close_socket(lr->sd);
186 static void alloc_listener(process_rec *process, char *addr, apr_port_t port)
188 ap_listen_rec **walk;
195 /* see if we've got an old listener for this address:port */
196 for (walk = &old_listeners; *walk; walk = &(*walk)->next) {
197 apr_get_sockaddr(&sa, APR_LOCAL, (*walk)->sd);
198 apr_get_port(&oldport, sa);
199 apr_get_ipaddr(&oldaddr, sa);
200 if (!strcmp(oldaddr, addr) && port == oldport) {
201 /* re-use existing record */
204 new->next = ap_listeners;
210 /* this has to survive restarts */
211 new = apr_palloc(process->pool, sizeof(ap_listen_rec));
213 if ((status = apr_create_socket(&new->sd, APR_INET, SOCK_STREAM,
214 process->pool)) != APR_SUCCESS) {
215 ap_log_error(APLOG_MARK, APLOG_CRIT, status, NULL,
216 "make_sock: failed to get a socket for %s", addr);
219 apr_get_sockaddr(&sa, APR_LOCAL, new->sd);
220 apr_set_port(sa, port);
221 apr_set_ipaddr(sa, addr);
222 new->next = ap_listeners;
226 #if !defined(WIN32) && !defined(SPMT_OS2_MPM)
229 int ap_listen_open(process_rec *process, apr_port_t port)
231 apr_pool_t *pconf = process->pconf;
236 /* allocate a default listener if necessary */
237 if (ap_listeners == NULL) {
238 alloc_listener(process, APR_ANYADDR, port ? port : DEFAULT_HTTP_PORT);
242 for (lr = ap_listeners; lr; lr = lr->next) {
247 if (make_sock(pconf, lr) == APR_SUCCESS) {
254 /* close the old listeners */
255 for (lr = old_listeners; lr; lr = next) {
256 apr_close_socket(lr->sd);
261 old_listeners = NULL;
263 apr_register_cleanup(pconf, NULL, apr_null_cleanup, close_listeners_on_exec);
265 return num_open ? 0 : -1;
269 int ap_setup_listeners(server_rec *s)
272 int num_listeners = 0;
273 if (ap_listen_open(s->process, s->port)) {
276 for (lr = ap_listeners; lr; lr = lr->next) {
279 return num_listeners;
283 void ap_listen_pre_config(void)
285 old_listeners = ap_listeners;
287 ap_listenbacklog = DEFAULT_LISTENBACKLOG;
291 const char *ap_set_listener(cmd_parms *cmd, void *dummy, const char *ips_)
293 char *ips=apr_pstrdup(cmd->pool, ips_);
297 const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
302 ports = strchr(ips, ':');
305 return "Missing IP address";
307 else if (ports[1] == '\0') {
308 return "Address must end in :<port-number>";
318 return "Port must be numeric";
321 if (ports == ips) { /* no address */
322 alloc_listener(cmd->server->process, APR_ANYADDR, port);
325 ips[(ports - ips) - 1] = '\0';
326 alloc_listener(cmd->server->process, ips, port);
332 const char *ap_set_listenbacklog(cmd_parms *cmd, void *dummy, const char *arg)
336 const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
343 return "ListenBacklog must be > 0";
345 ap_listenbacklog = b;
349 const char *ap_set_send_buffer_size(cmd_parms *cmd, void *dummy, const char *arg)
352 const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
357 if (s < 512 && s != 0) {
358 return "SendBufferSize must be >= 512 bytes, or 0 for system default.";
360 send_buffer_size = s;