| /* ==================================================================== |
| * Copyright (c) 1998-1999 The Apache Group. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by the Apache Group |
| * for use in the Apache HTTP server project (http://www.apache.org/)." |
| * |
| * 4. The names "Apache Server" and "Apache Group" must not be used to |
| * endorse or promote products derived from this software without |
| * prior written permission. For written permission, please contact |
| * apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by the Apache Group |
| * for use in the Apache HTTP server project (http://www.apache.org/)." |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY |
| * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Group and was originally based |
| * on public domain software written at the National Center for |
| * Supercomputing Applications, University of Illinois, Urbana-Champaign. |
| * For more information on the Apache Group and the Apache HTTP server |
| * project, please see <http://www.apache.org/>. |
| * |
| */ |
| |
| #include "apr_network_io.h" |
| |
| #define CORE_PRIVATE |
| #include "ap_config.h" |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "ap_listen.h" |
| #include "http_log.h" |
| #include <string.h> |
| |
| ap_listen_rec *ap_listeners; |
| static ap_listen_rec *old_listeners; |
| static int ap_listenbacklog; |
| static int send_buffer_size; |
| |
| /* TODO: make_sock is just begging and screaming for APR abstraction */ |
| static ap_status_t make_sock(ap_context_t *p, ap_listen_rec *server) |
| { |
| ap_socket_t *s = server->sd; |
| int one = 1; |
| char addr[512]; |
| ap_status_t stat; |
| |
| ap_cpystrn(addr, "[@main/listen.c:make_sock(): inet_ntoa(server->sin_addr)]", sizeof addr); |
| |
| stat = ap_setsocketopt(s, APR_SO_REUSEADDR, one); |
| if (stat != APR_SUCCESS && stat != APR_ENOTIMPL) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, stat, NULL, |
| "make_sock: for %s, setsockopt: (SO_REUSEADDR)", addr); |
| ap_close_socket(s); |
| return stat; |
| } |
| |
| stat = ap_setsocketopt(s, APR_SO_KEEPALIVE, one); |
| if (stat != APR_SUCCESS && stat != APR_ENOTIMPL) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, stat, NULL, |
| "make_sock: for %s, setsockopt: (SO_KEEPALIVE)", addr); |
| ap_close_socket(s); |
| return stat; |
| } |
| |
| /* |
| * To send data over high bandwidth-delay connections at full |
| * speed we must force the TCP window to open wide enough to keep the |
| * pipe full. The default window size on many systems |
| * is only 4kB. Cross-country WAN connections of 100ms |
| * at 1Mb/s are not impossible for well connected sites. |
| * If we assume 100ms cross-country latency, |
| * a 4kB buffer limits throughput to 40kB/s. |
| * |
| * To avoid this problem I've added the SendBufferSize directive |
| * to allow the web master to configure send buffer size. |
| * |
| * The trade-off of larger buffers is that more kernel memory |
| * is consumed. YMMV, know your customers and your network! |
| * |
| * -John Heidemann <johnh@isi.edu> 25-Oct-96 |
| * |
| * If no size is specified, use the kernel default. |
| */ |
| if (send_buffer_size) { |
| stat = ap_setsocketopt(s, APR_SO_SNDBUF, send_buffer_size); |
| if (stat != APR_SUCCESS && stat != APR_ENOTIMPL) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, stat, NULL, |
| "make_sock: failed to set SendBufferSize for %s, " |
| "using default", addr); |
| /* not a fatal error */ |
| } |
| } |
| |
| if ((stat = ap_bind(s)) != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, stat, NULL, |
| "make_sock: could not bind to %s", addr); |
| ap_close_socket(s); |
| return stat; |
| } |
| |
| if ((stat = ap_listen(s, ap_listenbacklog)) != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, stat, NULL, |
| "make_sock: unable to listen for connections on %s", addr); |
| ap_close_socket(s); |
| return stat; |
| } |
| |
| server->sd = s; |
| server->active = 1; |
| return APR_SUCCESS; |
| } |
| |
| |
| static ap_status_t close_listeners_on_exec(void *v) |
| { |
| ap_listen_rec *lr; |
| |
| for (lr = ap_listeners; lr; lr = lr->next) { |
| ap_close_socket(lr->sd); |
| lr->active = 0; |
| } |
| return APR_SUCCESS; |
| } |
| |
| |
| static void alloc_listener(process_rec *process, char *addr, unsigned int port) |
| { |
| ap_listen_rec **walk; |
| ap_listen_rec *new; |
| ap_status_t status; |
| char *oldaddr; |
| unsigned int oldport; |
| |
| /* see if we've got an old listener for this address:port */ |
| for (walk = &old_listeners; *walk; walk = &(*walk)->next) { |
| ap_get_local_port(&oldport, (*walk)->sd); |
| ap_get_local_ipaddr(&oldaddr,(*walk)->sd); |
| if (!strcmp(oldaddr, addr) && port == oldport) { |
| /* re-use existing record */ |
| new = *walk; |
| *walk = new->next; |
| new->next = ap_listeners; |
| ap_listeners = new; |
| return; |
| } |
| } |
| |
| /* this has to survive restarts */ |
| new = ap_palloc(process->pool, sizeof(ap_listen_rec)); |
| new->active = 0; |
| if ((status = ap_create_tcp_socket(&new->sd, process->pool)) != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, status, NULL, |
| "make_sock: failed to get a socket for %s", addr); |
| return; |
| } |
| ap_set_local_port(new->sd, port); |
| ap_set_local_ipaddr(new->sd, addr); |
| new->next = ap_listeners; |
| ap_listeners = new; |
| } |
| |
| |
| int ap_listen_open(process_rec *process, unsigned port) |
| { |
| ap_context_t *pconf = process->pconf; |
| ap_listen_rec *lr; |
| ap_listen_rec *next; |
| int num_open; |
| |
| /* allocate a default listener if necessary */ |
| if (ap_listeners == NULL) { |
| alloc_listener(process, APR_ANYADDR, port ? port : DEFAULT_HTTP_PORT); |
| } |
| |
| num_open = 0; |
| for (lr = ap_listeners; lr; lr = lr->next) { |
| if (lr->active) { |
| ++num_open; |
| } |
| else { |
| if (make_sock(pconf, lr) == APR_SUCCESS) { |
| ++num_open; |
| lr->active = 1; |
| } |
| } |
| } |
| |
| /* close the old listeners */ |
| for (lr = old_listeners; lr; lr = next) { |
| ap_close_socket(lr->sd); |
| lr->active = 0; |
| next = lr->next; |
| /* free(lr);*/ |
| } |
| old_listeners = NULL; |
| |
| ap_register_cleanup(pconf, NULL, ap_null_cleanup, close_listeners_on_exec); |
| |
| return num_open ? 0 : -1; |
| } |
| |
| |
| void ap_listen_pre_config(void) |
| { |
| old_listeners = ap_listeners; |
| ap_listeners = NULL; |
| ap_listenbacklog = DEFAULT_LISTENBACKLOG; |
| } |
| |
| |
| const char *ap_set_listener(cmd_parms *cmd, void *dummy, char *ips) |
| { |
| char *ports; |
| unsigned short port; |
| |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| ports = strchr(ips, ':'); |
| if (ports != NULL) { |
| if (ports == ips) { |
| return "Missing IP address"; |
| } |
| else if (ports[1] == '\0') { |
| return "Address must end in :<port-number>"; |
| } |
| *(ports++) = '\0'; |
| } |
| else { |
| ports = ips; |
| } |
| |
| port = atoi(ports); |
| if (!port) { |
| return "Port must be numeric"; |
| } |
| |
| if (ports == ips) { /* no address */ |
| alloc_listener(cmd->server->process, APR_ANYADDR, port); |
| } |
| else { |
| ips[(ports - ips) - 1] = '\0'; |
| alloc_listener(cmd->server->process, ips, port); |
| } |
| |
| return NULL; |
| } |
| |
| const char *ap_set_listenbacklog(cmd_parms *cmd, void *dummy, char *arg) |
| { |
| int b; |
| |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| b = atoi(arg); |
| if (b < 1) { |
| return "ListenBacklog must be > 0"; |
| } |
| ap_listenbacklog = b; |
| return NULL; |
| } |
| |
| const char *ap_set_send_buffer_size(cmd_parms *cmd, void *dummy, char *arg) |
| { |
| int s = atoi(arg); |
| const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); |
| if (err != NULL) { |
| return err; |
| } |
| |
| if (s < 512 && s != 0) { |
| return "SendBufferSize must be >= 512 bytes, or 0 for system default."; |
| } |
| send_buffer_size = s; |
| return NULL; |
| } |