tun.c revision 49434 
1/*-
2 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *	$Id: tun.c,v 1.14 1999/05/08 11:07:53 brian Exp $
27 */
28
29#include <sys/param.h>
30#ifdef __OpenBSD__
31#include <sys/socket.h>		/* For IFF_ defines */
32#include <net/if.h>		/* For IFF_ defines */
33#endif
34#include <netinet/in.h>
35#include <net/if_types.h>
36#include <net/if_tun.h>
37#include <netinet/in_systm.h>
38#include <netinet/ip.h>
39#include <sys/un.h>
40
41#include <errno.h>
42#include <string.h>
43#include <sys/ioctl.h>
44#include <termios.h>
45#ifdef __NetBSD__
46#include <stdio.h>
47#include <unistd.h>
48#endif
49
50#include "layer.h"
51#include "mbuf.h"
52#include "log.h"
53#include "timer.h"
54#include "lqr.h"
55#include "hdlc.h"
56#include "defs.h"
57#include "fsm.h"
58#include "throughput.h"
59#include "iplist.h"
60#include "slcompress.h"
61#include "ipcp.h"
62#include "filter.h"
63#include "descriptor.h"
64#include "lcp.h"
65#include "ccp.h"
66#include "link.h"
67#include "mp.h"
68#ifndef NORADIUS
69#include "radius.h"
70#endif
71#include "bundle.h"
72#include "tun.h"
73
74void
75tun_configure(struct bundle *bundle, int mtu)
76{
77#ifdef __NetBSD__
78  struct ifreq ifr;
79  int s;
80
81  s = socket(AF_INET, SOCK_DGRAM, 0);
82
83  if (s < 0) {
84    log_Printf(LogERROR, "tun_configure: socket(): %s\n", strerror(errno));
85    return;
86  }
87
88  sprintf(ifr.ifr_name, "tun%d", bundle->unit);
89  ifr.ifr_mtu = mtu;
90  if (ioctl(s, SIOCSIFMTU, &ifr) < 0)
91      log_Printf(LogERROR, "tun_configure: ioctl(SIOCSIFMTU): %s\n",
92             strerror(errno));
93
94  close(s);
95#else
96  struct tuninfo info;
97
98  memset(&info, '\0', sizeof info);
99  info.type = IFT_PPP;
100  info.mtu = mtu;
101
102  info.baudrate = bundle->bandwidth;
103#ifdef __OpenBSD__
104  info.flags = IFF_UP|IFF_POINTOPOINT;
105#endif
106  if (ioctl(bundle->dev.fd, TUNSIFINFO, &info) < 0)
107    log_Printf(LogERROR, "tun_configure: ioctl(TUNSIFINFO): %s\n",
108	      strerror(errno));
109#endif
110}
111