2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
31 #include <sys/param.h>
33 #include <sys/socket.h> /* For IFF_ defines */
35 #include <net/if.h> /* For IFF_ defines */
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>
47 #if defined(__OpenBSD__) || defined(__NetBSD__)
48 #include <sys/ioctl.h>
65 #include "throughput.h"
67 #include "slcompress.h"
71 #include "descriptor.h"
86 tun_configure(struct bundle *bundle)
92 s = socket(PF_INET, SOCK_DGRAM, 0);
95 log_Printf(LogERROR, "tun_configure: socket(): %s\n", strerror(errno));
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",
109 memset(&info, '\0', sizeof info);
111 info.mtu = bundle->iface->mtu;
113 info.baudrate = bundle->bandwidth;
115 info.flags = IFF_UP|IFF_POINTOPOINT|IFF_MULTICAST;
117 if (ID0ioctl(bundle->dev.fd, TUNSIFINFO, &info) < 0)
118 log_Printf(LogERROR, "tun_configure: ioctl(TUNSIFINFO): %s\n",