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,
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41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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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"
69 ap_listen_rec *ap_listeners;
70 static ap_listen_rec *old_listeners;
71 static int ap_listenbacklog;
72 static int send_buffer_size;
74 /* TODO: make_sock is just begging and screaming for APR abstraction */
75 static ap_status_t make_sock(ap_context_t *p, ap_listen_rec *server)
77 ap_socket_t *s = server->sd;
84 ap_get_local_port(&port,s);
85 ap_get_local_ipaddr(&ipaddr,s);
86 ap_snprintf(addr, sizeof(addr), "address %s port %u", ipaddr,
89 stat = ap_setsocketopt(s, APR_SO_REUSEADDR, one);
90 if (stat != APR_SUCCESS && stat != APR_ENOTIMPL) {
91 ap_log_error(APLOG_MARK, APLOG_CRIT, stat, NULL,
92 "make_sock: for %s, setsockopt: (SO_REUSEADDR)", addr);
97 stat = ap_setsocketopt(s, APR_SO_KEEPALIVE, one);
98 if (stat != APR_SUCCESS && stat != APR_ENOTIMPL) {
99 ap_log_error(APLOG_MARK, APLOG_CRIT, stat, NULL,
100 "make_sock: for %s, setsockopt: (SO_KEEPALIVE)", addr);
106 * To send data over high bandwidth-delay connections at full
107 * speed we must force the TCP window to open wide enough to keep the
108 * pipe full. The default window size on many systems
109 * is only 4kB. Cross-country WAN connections of 100ms
110 * at 1Mb/s are not impossible for well connected sites.
111 * If we assume 100ms cross-country latency,
112 * a 4kB buffer limits throughput to 40kB/s.
114 * To avoid this problem I've added the SendBufferSize directive
115 * to allow the web master to configure send buffer size.
117 * The trade-off of larger buffers is that more kernel memory
118 * is consumed. YMMV, know your customers and your network!
120 * -John Heidemann <johnh@isi.edu> 25-Oct-96
122 * If no size is specified, use the kernel default.
124 if (send_buffer_size) {
125 stat = ap_setsocketopt(s, APR_SO_SNDBUF, send_buffer_size);
126 if (stat != APR_SUCCESS && stat != APR_ENOTIMPL) {
127 ap_log_error(APLOG_MARK, APLOG_WARNING, stat, NULL,
128 "make_sock: failed to set SendBufferSize for %s, "
129 "using default", addr);
130 /* not a fatal error */
134 if ((stat = ap_bind(s)) != APR_SUCCESS) {
135 ap_log_error(APLOG_MARK, APLOG_CRIT, stat, NULL,
136 "make_sock: could not bind to %s", addr);
141 if ((stat = ap_listen(s, ap_listenbacklog)) != APR_SUCCESS) {
142 ap_log_error(APLOG_MARK, APLOG_ERR, stat, NULL,
143 "make_sock: unable to listen for connections on %s", addr);
154 static ap_status_t close_listeners_on_exec(void *v)
158 for (lr = ap_listeners; lr; lr = lr->next) {
159 ap_close_socket(lr->sd);
166 static void alloc_listener(process_rec *process, char *addr, unsigned int port)
168 ap_listen_rec **walk;
172 unsigned int oldport;
174 /* see if we've got an old listener for this address:port */
175 for (walk = &old_listeners; *walk; walk = &(*walk)->next) {
176 ap_get_local_port(&oldport, (*walk)->sd);
177 ap_get_local_ipaddr(&oldaddr,(*walk)->sd);
178 if (!strcmp(oldaddr, addr) && port == oldport) {
179 /* re-use existing record */
182 new->next = ap_listeners;
188 /* this has to survive restarts */
189 new = ap_palloc(process->pool, sizeof(ap_listen_rec));
191 if ((status = ap_create_tcp_socket(&new->sd, process->pool)) != APR_SUCCESS) {
192 ap_log_error(APLOG_MARK, APLOG_CRIT, status, NULL,
193 "make_sock: failed to get a socket for %s", addr);
196 ap_set_local_port(new->sd, port);
197 ap_set_local_ipaddr(new->sd, addr);
198 new->next = ap_listeners;
203 int ap_listen_open(process_rec *process, unsigned port)
205 ap_context_t *pconf = process->pconf;
210 /* allocate a default listener if necessary */
211 if (ap_listeners == NULL) {
212 alloc_listener(process, APR_ANYADDR, port ? port : DEFAULT_HTTP_PORT);
216 for (lr = ap_listeners; lr; lr = lr->next) {
221 if (make_sock(pconf, lr) == APR_SUCCESS) {
228 /* close the old listeners */
229 for (lr = old_listeners; lr; lr = next) {
230 ap_close_socket(lr->sd);
235 old_listeners = NULL;
237 ap_register_cleanup(pconf, NULL, ap_null_cleanup, close_listeners_on_exec);
239 return num_open ? 0 : -1;
243 void ap_listen_pre_config(void)
245 old_listeners = ap_listeners;
247 ap_listenbacklog = DEFAULT_LISTENBACKLOG;
251 const char *ap_set_listener(cmd_parms *cmd, void *dummy, char *ips)
256 const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
261 ports = strchr(ips, ':');
264 return "Missing IP address";
266 else if (ports[1] == '\0') {
267 return "Address must end in :<port-number>";
277 return "Port must be numeric";
280 if (ports == ips) { /* no address */
281 alloc_listener(cmd->server->process, APR_ANYADDR, port);
284 ips[(ports - ips) - 1] = '\0';
285 alloc_listener(cmd->server->process, ips, port);
291 const char *ap_set_listenbacklog(cmd_parms *cmd, void *dummy, char *arg)
295 const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
302 return "ListenBacklog must be > 0";
304 ap_listenbacklog = b;
308 const char *ap_set_send_buffer_size(cmd_parms *cmd, void *dummy, char *arg)
311 const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
316 if (s < 512 && s != 0) {
317 return "SendBufferSize must be >= 512 bytes, or 0 for system default.";
319 send_buffer_size = s;