usr/src/cmd/dtrace/test/tst/common/ip/get.ipv6remote.pl

   1 #!/usr/perl5/bin/perl -w
   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 #
  24 # Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  25 # Use is subject to license terms.
  26 #
  27
  28 #
  29 # get.ipv6remote.pl
  30 #
  31 # Find an IPv6 reachable remote host using both ifconfig(1M) and ping(1M).
  32 # Print the local address and the remote address, or print nothing if either
  33 # no IPv6 interfaces or remote hosts were found.  (Remote IPv6 testing is
  34 # considered optional, and so not finding another IPv6 host is not an error
  35 # state we need to log.)  Exit status is 0 if a host was found.
  36 #
  37
  38 use strict;
  39 use IO::Socket;
  40
  41 my $MAXHOSTS = 32;                      # max hosts to scan
  42 my $TIMEOUT = 3;                        # connection timeout
  43 my $MULTICAST = "FF02::1";              # IPv6 multicast address
  44
  45 #
  46 # Determine local IP address
  47 #
  48 my $local = "";
  49 my $remote = "";
  50 my %Local;
  51 my $up;
  52 open IFCONFIG, '/usr/sbin/ifconfig -a inet6 |'
  53     or die "Couldn't run ifconfig: $!\n";
  54 while (<IFCONFIG>) {
  55         next if /^lo/;
  56
  57         # "UP" is always printed first (see print_flags() in ifconfig.c):
  58         $up = 1 if /^[a-z].*<UP,/;
  59         $up = 0 if /^[a-z].*<,/;
  60
  61         # assume output is "inet6 ...":
  62         if (m:inet6 (\S+)/:) {
  63                 my $addr = $1;
  64                 $Local{$addr} = 1;
  65                 $local = $addr if $up and $local eq "";
  66                 $up = 0;
  67         }
  68 }
  69 close IFCONFIG;
  70 exit 1 if $local eq "";
  71
  72 #
  73 # Find the first remote host that responds to an icmp echo,
  74 # which isn't a local address.
  75 #
  76 open PING, "/usr/sbin/ping -ns -A inet6 $MULTICAST 56 $MAXHOSTS |" or
  77     die "Couldn't run ping: $!\n";
  78 while (<PING>) {
  79         if (/bytes from (.*): / and not defined $Local{$1}) {
  80                 $remote = $1;
  81                 last;
  82         }
  83 }
  84 close PING;
  85 exit 2 if $remote eq "";
  86
  87 print "$local $remote\n";