1/*
2 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "common.h"
35#ifdef HAVE_SYS_TYPES_H
36#include <sys/types.h>
37#endif
38#ifdef HAVE_SYS_SOCKET_H
39#include <sys/socket.h>
40#endif
41
42RCSID("$Id$");
43
44void
45set_buffer_size(int fd, int read)
46{
47#if defined(SO_RCVBUF) && defined(SO_SNDBUF) && defined(HAVE_SETSOCKOPT)
48    int size = 4194304;
49    int optname = read ? SO_RCVBUF : SO_SNDBUF;
50
51#ifdef HAVE_GETSOCKOPT
52    int curr=0;
53    socklen_t optlen;
54
55    optlen = sizeof(curr);
56    if(getsockopt(fd, SOL_SOCKET, optname, (void *)&curr, &optlen) == 0) {
57        if(curr >= size) {
58            /* Already large enough */
59            return;
60        }
61    }
62#endif /* HAVE_GETSOCKOPT */
63
64    while(size >= 131072 &&
65	  setsockopt(fd, SOL_SOCKET, optname, (void *)&size, sizeof(size)) < 0)
66	size /= 2;
67#endif
68}
69
70
71