usr/src/cmd/svc/milestone/net-routing-setup

   1 #!/bin/sh
   2 #
   3 # CDDL HEADER START
   4 #
   5 # The contents of this file are subject to the terms of the
   6 # Common Development and Distribution License (the "License").
   7 # You may not use this file except in compliance with the License.
   8 #
   9 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10 # or http://www.opensolaris.org/os/licensing.
  11 # See the License for the specific language governing permissions
  12 # and limitations under the License.
  13 #
  14 # When distributing Covered Code, include this CDDL HEADER in each
  15 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16 # If applicable, add the following below this CDDL HEADER, with the
  17 # fields enclosed by brackets "[]" replaced with your own identifying
  18 # information: Portions Copyright [yyyy] [name of copyright owner]
  19 #
  20 # CDDL HEADER END
  21 #
  22 #
  23 # Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
  24
  25 # This script configures IP routing.
  26
  27 . /lib/svc/share/smf_include.sh
  28
  29 #
  30 # In a shared-IP zone we need this service to be up, but all of the work
  31 # it tries to do is irrelevant (and will actually lead to the service
  32 # failing if we try to do it), so just bail out.
  33 # In the global zone and exclusive-IP zones we proceed.
  34 #
  35 smf_configure_ip || exit $SMF_EXIT_OK
  36
  37 #
  38 # Configure default IPv4 routers using the local "/etc/defaultrouter"
  39 # configuration file.  The file can contain the hostnames or IP
  40 # addresses of one or more default routers.  If hostnames are used,
  41 # each hostname must also be listed in the local "/etc/hosts" file
  42 # because NIS is not running at the time that this script is
  43 # run.  Each router name or address is listed on a single line by
  44 # itself in the file.  Anything else on that line after the router's
  45 # name or address is ignored.  Lines that begin with "#" are
  46 # considered comments and ignored.
  47 #
  48 # The default routes listed in the "/etc/defaultrouter" file will
  49 # replace those added by the kernel during diskless booting.  An
  50 # empty "/etc/defaultrouter" file will cause the default route
  51 # added by the kernel to be deleted.
  52 #
  53 # Note that the default router file is ignored if we received routes
  54 # from a DHCP server.  Our policy is to always trust DHCP over local
  55 # administration.
  56 #
  57 smf_netstrategy
  58
  59 if [ "$_INIT_NET_STRATEGY" = "dhcp" ] && \
  60     [ -n "`/sbin/dhcpinfo Router`" ]; then
  61         defrouters=`/sbin/dhcpinfo Router`
  62 elif [ -f /etc/defaultrouter ]; then
  63         defrouters=`/usr/bin/grep -v \^\# /etc/defaultrouter | \
  64             /usr/bin/awk '{print $1}'`
  65         if [ -n "$defrouters" ]; then
  66                 #
  67                 # We want the default router(s) listed in
  68                 # /etc/defaultrouter to replace the one added from the
  69                 # BOOTPARAMS WHOAMI response but we must avoid flushing
  70                 # the last route between the running system and its
  71                 # /usr file system.
  72                 #
  73
  74                 # First, remember the original route.
  75                 shift $#
  76                 set -- `/usr/bin/netstat -rn -f inet | \
  77                     /usr/bin/grep '^default'`
  78                 route_IP="$2"
  79
  80                 #
  81                 # Next, add those from /etc/defaultrouter.  While doing
  82                 # this, if one of the routes we add is for the route
  83                 # previously added as a result of the BOOTPARAMS
  84                 # response, we will see a message of the form:
  85                 #       "add net default: gateway a.b.c.d: entry exists"
  86                 #
  87                 do_delete=yes
  88                 for router in $defrouters; do
  89                         route_added=`/usr/sbin/route -n add default \
  90                             -gateway $router`
  91                         res=$?
  92                         set -- $route_added
  93                         [ $res -ne 0 -a "$5" = "$route_IP:" ] && do_delete=no
  94                 done
  95
  96                 #
  97                 # Finally, delete the original default route unless it
  98                 # was also listed in the defaultrouter file.
  99                 #
 100                 if [ -n "$route_IP" -a $do_delete = yes ]; then
 101                         /usr/sbin/route -n delete default \
 102                             -gateway $route_IP >/dev/null
 103                 fi
 104         else
 105                 /usr/sbin/route -fn > /dev/null
 106         fi
 107 else
 108         defrouters=
 109 fi
 110
 111 #
 112 # Read /etc/inet/static_routes and add each route.
 113 #
 114 if [ -f /etc/inet/static_routes ]; then
 115         echo "Adding persistent routes:"
 116         /usr/bin/egrep -v "^(#|$)" /etc/inet/static_routes | while read line; do
 117                 /usr/sbin/route add $line
 118         done
 119 fi
 120
 121 # Clear exit status.
 122 exit $SMF_EXIT_OK