mdw@git.distorted.org.uk Git - tripe/blob - svc/tripe-ifup.in

   1 #! /bin/sh
   2 ###
   3 ### TrIPE interface initialization script
   4 ###   suitable for Linux; other operating systems probably want something
   5 ###   similar
   6
   7 ###----- Licensing notica ---------------------------------------------------
   8 ###
   9 ### Redistribution, modification and use of this file is permitted without
  10 ### limitation.
  11 ###
  12 ### This file is distributed in the hope that it will be useful,
  13 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  15
  16 set -e
  17
  18 : ${bindir=@bindir@}
  19 : ${tripectl=$bindir/tripectl}
  20 PATH=/usr/bin:/usr/sbin:/bin:/sbin:$bindir
  21 export PATH TRIPEDIR
  22
  23 ###--------------------------------------------------------------------------
  24 ### Collect arguments.
  25
  26 ## Collect the simple arguments.
  27 if [ $# -lt 3 ]; then
  28   echo >&2 "usage: $0 PEER IFNAME ADDR..."; exit 1
  29 fi
  30 peer=$1 ifname=$2 family=$3; shift 3
  31
  32 ## Parse the address family.
  33 case "$family,$#" in
  34   INET,1) addr=$1 port=4070 ;;
  35   INET,2) addr=$1 port=$2 ;;
  36   INET,*) echo >&2 "$0: bad INET address"; exit 1 ;;
  37   *)      echo >&2 "$0: unknown address family $family"; exit 1 ;;
  38 esac
  39
  40 ###--------------------------------------------------------------------------
  41 ### Set the interface name.
  42
  43 case "${P_IFNAME+set}" in
  44   set)
  45     ip link set "$ifname" name "$P_IFNAME"
  46     ifname=$P_IFNAME
  47     $tripectl setifname "$peer" "$ifname"
  48     ;;
  49 esac
  50
  51 ###--------------------------------------------------------------------------
  52 ### Configure the point-to-point link.
  53
  54 ifup=no
  55 case "${P_LADDR+set},${P_RADDR+set}" in
  56   set,set)
  57     case "${P_MTU+set}" in
  58       set) mtu=$P_MTU;;
  59       *)
  60         pathmtu=$(pathmtu "$addr")
  61         mtu=$(expr "$pathmtu" - 33 - $A_CIPHER_BLKSZ - $A_MAC_TAGSZ)
  62         ;;
  63     esac
  64     ifconfig "$ifname" "$P_LADDR" pointopoint "$P_RADDR" up mtu "$mtu"
  65     ifup=yes
  66     ;;
  67 esac
  68
  69 ###--------------------------------------------------------------------------
  70 ### Set up routing.
  71
  72 case "$ifup,${P_NETS+set}" in
  73   yes,set)
  74     for net in $P_NETS; do
  75       route add -net $net gw "$P_RADDR" dev "$ifname" metric 2
  76     done
  77     ;;
  78 esac
  79
  80 ###--------------------------------------------------------------------------
  81 ### Maybe invoke a follow-on script.
  82
  83 case "${P_IFUPEXTRA+set}" in
  84   set)
  85     eval "$P_IFUPEXTRA"
  86     ;;
  87 esac
  88
  89 ###--------------------------------------------------------------------------
  90 ### Issue a notification that we've won.
  91
  92 $tripectl notify tripe-ifup configured "$peer"
  93
  94 ###----- That's all, folks --------------------------------------------------