tun.c revision 330449 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: stable/11/usr.sbin/ppp/tun.c 330449 2018-03-05 07:26:05Z eadler $
29 */
30
31#include <sys/param.h>
32
33#include <sys/socket.h>		/* For IFF_ defines */
34#ifndef __FreeBSD__
35#include <net/if.h>		/* For IFF_ defines */
36#endif
37#include <net/route.h>
38#include <netinet/in.h>
39#include <net/if_types.h>
40#include <net/if_tun.h>
41#include <netinet/in_systm.h>
42#include <netinet/ip.h>
43#include <sys/un.h>
44
45#include <errno.h>
46#include <string.h>
47#if defined(__OpenBSD__) || defined(__NetBSD__)
48#include <sys/ioctl.h>
49#endif
50#include <stdio.h>
51#include <termios.h>
52#ifdef __NetBSD__
53#include <unistd.h>
54#endif
55
56#include "layer.h"
57#include "mbuf.h"
58#include "log.h"
59#include "id.h"
60#include "timer.h"
61#include "lqr.h"
62#include "hdlc.h"
63#include "defs.h"
64#include "fsm.h"
65#include "throughput.h"
66#include "iplist.h"
67#include "slcompress.h"
68#include "ncpaddr.h"
69#include "ipcp.h"
70#include "filter.h"
71#include "descriptor.h"
72#include "lcp.h"
73#include "ccp.h"
74#include "link.h"
75#include "mp.h"
76#include "iface.h"
77#ifndef NORADIUS
78#include "radius.h"
79#endif
80#include "ipv6cp.h"
81#include "ncp.h"
82#include "bundle.h"
83#include "tun.h"
84
85void
86tun_configure(struct bundle *bundle)
87{
88#ifdef __NetBSD__
89  struct ifreq ifr;
90  int s;
91
92  s = socket(PF_INET, SOCK_DGRAM, 0);
93
94  if (s < 0) {
95    log_Printf(LogERROR, "tun_configure: socket(): %s\n", strerror(errno));
96    return;
97  }
98
99  sprintf(ifr.ifr_name, "tun%d", bundle->unit);
100  ifr.ifr_mtu = bundle->iface->mtu;
101  if (ioctl(s, SIOCSIFMTU, &ifr) < 0)
102      log_Printf(LogERROR, "tun_configure: ioctl(SIOCSIFMTU): %s\n",
103             strerror(errno));
104
105  close(s);
106#else
107  struct tuninfo info;
108
109  memset(&info, '\0', sizeof info);
110  info.type = IFT_PPP;
111  info.mtu = bundle->iface->mtu;
112
113  info.baudrate = bundle->bandwidth;
114#ifdef __OpenBSD__
115  info.flags = IFF_UP|IFF_POINTOPOINT|IFF_MULTICAST;
116#endif
117  if (ID0ioctl(bundle->dev.fd, TUNSIFINFO, &info) < 0)
118    log_Printf(LogERROR, "tun_configure: ioctl(TUNSIFINFO): %s\n",
119	      strerror(errno));
120#endif
121}
122