tun.c revision 43313
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 1.10 1998/10/22 02:32:50 brian Exp $ 27 */ 28 29#include <sys/param.h> 30#include <sys/socket.h> /* For IFF_ defines */ 31#include <net/if.h> /* For IFF_ defines */ 32#include <netinet/in.h> 33#include <net/if_types.h> 34#include <net/if_tun.h> 35#include <netinet/in_systm.h> 36#include <netinet/ip.h> 37#include <sys/un.h> 38 39#include <string.h> 40#include <sys/ioctl.h> 41#include <sys/errno.h> 42 43#include "mbuf.h" 44#include "log.h" 45#include "timer.h" 46#include "lqr.h" 47#include "hdlc.h" 48#include "defs.h" 49#include "fsm.h" 50#include "throughput.h" 51#include "iplist.h" 52#include "slcompress.h" 53#include "ipcp.h" 54#include "filter.h" 55#include "descriptor.h" 56#include "lcp.h" 57#include "ccp.h" 58#include "link.h" 59#include "mp.h" 60#ifndef NORADIUS 61#include "radius.h" 62#endif 63#include "bundle.h" 64#include "tun.h" 65 66void 67tun_configure(struct bundle *bundle, int mtu) 68{ 69 struct tuninfo info; 70 71 memset(&info, '\0', sizeof info); 72 info.type = IFT_PPP; 73#ifndef NORADIUS 74 if (bundle->radius.valid && bundle->radius.mtu && bundle->radius.mtu < mtu) { 75 log_Printf(LogLCP, "Reducing MTU to radius value %lu\n", 76 bundle->radius.mtu); 77 info.mtu = bundle->radius.mtu; 78 } else 79#endif 80 info.mtu = mtu; 81 82 info.baudrate = bundle->ifSpeed; 83#ifdef __OpenBSD__ 84 info.flags = IFF_UP|IFF_POINTOPOINT; 85#endif 86 if (ioctl(bundle->dev.fd, TUNSIFINFO, &info) < 0) 87 log_Printf(LogERROR, "tun_configure: ioctl(TUNSIFINFO): %s\n", 88 strerror(errno)); 89} 90