1210753Srpaulo#!/usr/bin/perl -w 2210753Srpaulo# 3210753Srpaulo# CDDL HEADER START 4210753Srpaulo# 5210753Srpaulo# The contents of this file are subject to the terms of the 6210753Srpaulo# Common Development and Distribution License (the "License"). 7210753Srpaulo# You may not use this file except in compliance with the License. 8210753Srpaulo# 9210753Srpaulo# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10210753Srpaulo# or http://www.opensolaris.org/os/licensing. 11210753Srpaulo# See the License for the specific language governing permissions 12210753Srpaulo# and limitations under the License. 13210753Srpaulo# 14210753Srpaulo# When distributing Covered Code, include this CDDL HEADER in each 15210753Srpaulo# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16210753Srpaulo# If applicable, add the following below this CDDL HEADER, with the 17210753Srpaulo# fields enclosed by brackets "[]" replaced with your own identifying 18210753Srpaulo# information: Portions Copyright [yyyy] [name of copyright owner] 19210753Srpaulo# 20210753Srpaulo# CDDL HEADER END 21210753Srpaulo# 22210753Srpaulo 23210753Srpaulo# 24210753Srpaulo# Copyright 2008 Sun Microsystems, Inc. All rights reserved. 25210753Srpaulo# Use is subject to license terms. 26210753Srpaulo# 27210753Srpaulo#pragma ident "%Z%%M% %I% %E% SMI" 28210753Srpaulo 29210753Srpaulo# 30210753Srpaulo# get.ipv6remote.pl 31210753Srpaulo# 32210753Srpaulo# Find an IPv6 reachable remote host using both ifconfig(1M) and ping(1M). 33210753Srpaulo# Print the local address and the remote address, or print nothing if either 34210753Srpaulo# no IPv6 interfaces or remote hosts were found. (Remote IPv6 testing is 35210753Srpaulo# considered optional, and so not finding another IPv6 host is not an error 36210753Srpaulo# state we need to log.) Exit status is 0 if a host was found. 37210753Srpaulo# 38210753Srpaulo 39210753Srpaulouse strict; 40210753Srpaulouse IO::Socket; 41210753Srpaulo 42210753Srpaulomy $MAXHOSTS = 32; # max hosts to scan 43210753Srpaulomy $TIMEOUT = 3; # connection timeout 44210753Srpaulomy $MULTICAST = "FF02::1"; # IPv6 multicast address 45210753Srpaulo 46210753Srpaulo# 47210753Srpaulo# Determine local IP address 48210753Srpaulo# 49210753Srpaulomy $local = ""; 50210753Srpaulomy $remote = ""; 51210753Srpaulomy %Local; 52210753Srpaulomy $up; 53211545Srpauloopen IFCONFIG, '/sbin/ifconfig -a inet6 |' 54210753Srpaulo or die "Couldn't run ifconfig: $!\n"; 55210753Srpaulowhile (<IFCONFIG>) { 56210753Srpaulo next if /^lo/; 57210753Srpaulo 58210753Srpaulo # "UP" is always printed first (see print_flags() in ifconfig.c): 59210753Srpaulo $up = 1 if /^[a-z].*<UP,/; 60210753Srpaulo $up = 0 if /^[a-z].*<,/; 61210753Srpaulo 62210753Srpaulo # assume output is "inet6 ...": 63210753Srpaulo if (m:inet6 (\S+)/:) { 64210753Srpaulo my $addr = $1; 65210753Srpaulo $Local{$addr} = 1; 66210753Srpaulo $local = $addr if $up and $local eq ""; 67210753Srpaulo $up = 0; 68210753Srpaulo } 69210753Srpaulo} 70210753Srpauloclose IFCONFIG; 71210753Srpauloexit 1 if $local eq ""; 72210753Srpaulo 73210753Srpaulo# 74210753Srpaulo# Find the first remote host that responds to an icmp echo, 75210753Srpaulo# which isn't a local address. 76210753Srpaulo# 77211545Srpauloopen PING, "/sbin/ping -ns -A inet6 $MULTICAST 56 $MAXHOSTS |" or 78210753Srpaulo die "Couldn't run ping: $!\n"; 79210753Srpaulowhile (<PING>) { 80210753Srpaulo if (/bytes from (.*): / and not defined $Local{$1}) { 81210753Srpaulo $remote = $1; 82210753Srpaulo last; 83210753Srpaulo } 84210753Srpaulo} 85210753Srpauloclose PING; 86210753Srpauloexit 2 if $remote eq ""; 87210753Srpaulo 88210753Srpauloprint "$local $remote\n"; 89