listen.c revision b29cef2891ae88e684c4540a39d9728ba95e0467
/* ====================================================================
* 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
* 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 "httpd.h"
#include "http_config.h"
#include "ap_listen.h"
#include "http_log.h"
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 */
{
int s;
int one = 1;
char addr[512];
else
"make_sock: failed to get a socket for %s", addr);
return -1;
}
#ifdef SO_REUSEADDR
"make_sock: for %s, setsockopt: (SO_REUSEADDR)", addr);
close(s);
return -1;
}
#endif
one = 1;
#ifdef SO_KEEPALIVE
"make_sock: for %s, setsockopt: (SO_KEEPALIVE)", addr);
close(s);
return -1;
}
#endif
/*
* 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.
*/
#ifndef SO_SNDBUF
if (send_buffer_size) {
(char *) &send_buffer_size, sizeof(int)) < 0) {
"make_sock: failed to set SendBufferSize for %s, "
"using default", addr);
/* not a fatal error */
}
}
#endif
"make_sock: could not bind to %s", addr);
close(s);
return -1;
}
"make_sock: unable to listen for connections on %s", addr);
close(s);
return -1;
}
return s;
}
static void close_listeners_on_exec(void *v)
{
}
}
{
/* see if we've got an old listener for this address:port */
/* re-use existing record */
ap_listeners = new;
return;
}
}
/* this has to survive restarts */
ap_listeners = new;
}
{
int num_open;
struct sockaddr_in local_addr;
/* allocate a default listener if necessary */
if (ap_listeners == NULL) {
}
num_open = 0;
}
++num_open;
}
}
/* close the old listeners */
}
return num_open ? 0 : -1;
}
void ap_listen_pre_config(void)
{
ap_listeners = NULL;
}
{
char *ports;
unsigned short port;
struct sockaddr_in local_addr;
return err;
}
return "Missing IP address";
}
return "Address must end in :<port-number>";
}
*(ports++) = '\0';
}
else {
}
}
else {
}
if (!port) {
return "Port must be numeric";
}
return NULL;
}
{
int b;
return err;
}
if (b < 1) {
return "ListenBacklog must be > 0";
}
ap_listenbacklog = b;
return 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;
}