usr.sbin/ppp/tun.c

   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  * $FreeBSD: src/usr.sbin/ppp/tun.c,v 1.20.2.4 2002/09/01 02:12:32 brian Exp $
  27  * $DragonFly: src/usr.sbin/ppp/tun.c,v 1.4 2004/02/03 08:11:47 dillon Exp $
  28  */
  29
  30 #include <sys/param.h>
  31
  32 #include <sys/socket.h>         /* For IFF_ defines */
  33 #ifndef __DragonFly__
  34 #include <net/if.h>             /* For IFF_ defines */
  35 #endif
  36 #include <net/route.h>
  37 #include <netinet/in.h>
  38 #include <net/if_types.h>
  39 #include <net/tun/if_tun.h>
  40 #include <netinet/in_systm.h>
  41 #include <netinet/ip.h>
  42 #include <sys/un.h>
  43
  44 #include <errno.h>
  45 #include <string.h>
  46 #if defined(__OpenBSD__) || defined(__NetBSD__)
  47 #include <sys/ioctl.h>
  48 #endif
  49 #include <stdio.h>
  50 #include <termios.h>
  51 #ifdef __NetBSD__
  52 #include <unistd.h>
  53 #endif
  54
  55 #include "layer.h"
  56 #include "mbuf.h"
  57 #include "log.h"
  58 #include "id.h"
  59 #include "timer.h"
  60 #include "lqr.h"
  61 #include "hdlc.h"
  62 #include "defs.h"
  63 #include "fsm.h"
  64 #include "throughput.h"
  65 #include "iplist.h"
  66 #include "slcompress.h"
  67 #include "ncpaddr.h"
  68 #include "ipcp.h"
  69 #include "filter.h"
  70 #include "descriptor.h"
  71 #include "lcp.h"
  72 #include "ccp.h"
  73 #include "link.h"
  74 #include "mp.h"
  75 #include "iface.h"
  76 #ifndef NORADIUS
  77 #include "radius.h"
  78 #endif
  79 #include "ipv6cp.h"
  80 #include "ncp.h"
  81 #include "bundle.h"
  82 #include "tun.h"
  83
  84 void
  85 tun_configure(struct bundle *bundle)
  86 {
  87 #ifdef __NetBSD__
  88   struct ifreq ifr;
  89   int s;
  90
  91   s = socket(PF_INET, SOCK_DGRAM, 0);
  92
  93   if (s < 0) {
  94     log_Printf(LogERROR, "tun_configure: socket(): %s\n", strerror(errno));
  95     return;
  96   }
  97
  98   sprintf(ifr.ifr_name, "tun%d", bundle->unit);
  99   ifr.ifr_mtu = bundle->iface->mtu;
 100   if (ioctl(s, SIOCSIFMTU, &ifr) < 0)
 101       log_Printf(LogERROR, "tun_configure: ioctl(SIOCSIFMTU): %s\n",
 102              strerror(errno));
 103
 104   close(s);
 105 #else
 106   struct tuninfo info;
 107
 108   memset(&info, '\0', sizeof info);
 109   info.type = IFT_PPP;
 110   info.mtu = bundle->iface->mtu;
 111
 112   info.baudrate = bundle->bandwidth;
 113 #ifdef __OpenBSD__
 114   info.flags = IFF_UP|IFF_POINTOPOINT|IFF_MULTICAST;
 115 #endif
 116   if (ID0ioctl(bundle->dev.fd, TUNSIFINFO, &info) < 0)
 117     log_Printf(LogERROR, "tun_configure: ioctl(TUNSIFINFO): %s\n",
 118               strerror(errno));
 119 #endif
 120 }