#!/usr/bin/perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html

# Sample xCAT post script for configuring eth1 based on eth0 settings and
# some conventions. 
# This scripts works for both diskfull installs, diskless boots on AIX or Linux.
# To use, change the settings of the following variables at the top of this script:
#    $nic_num - set this to the interface number, e.g. 1 for eth1 or en1
#    $netmask - the netmask that should be used when ifconfig'ing this NIC

use strict;
use Socket;

# Set these 2 variables appropriately for your cluster
my $nic_num = 1;
my $netmask = '255.255.255.0';

my $nic;
if ($^O =~ /^aix/i) {
    $nic = "en$nic_num";
} else {
    $nic = "eth$nic_num";
}

# Usually do not have to set this...
my $gateway;
#$gateway = '1.2.3.254';

# Take primary node name, add "-eth1" for linux and "-en1" for AIX  and 
#	then reverse resolve to get what ip should be
sub getipaddr()
{
    my ($iporhost) = @_;

    my $socket6support = eval { require Socket6 };

    if (($iporhost =~ /\d+\.\d+\.\d+\.\d+/) || ($iporhost =~ /:/))
    {
        #pass in an ip and only want an ip??
        return $iporhost;
    }

    if ($socket6support) # the getaddrinfo and getnameinfo supports both IPv4 and IPv6
    {
        my ($family, $socket, $protocol, $ip, $name) = Socket6::getaddrinfo($iporhost,0);
        if ($ip)
        {
            return (Socket6::getnameinfo($ip, Socket6::NI_NUMERICHOST()))[0];
        }
       return undef;
    }
    else
    {
         return inet_ntoa(inet_aton($iporhost))
    }
}

my $host = `echo $ENV{NODE} |sed "s/-hf[0-9]//g"`;
chomp($host);
my $hostname = "$host-$nic";
my $ip = &getipaddr($hostname);
if (!$ip) { system("logger -t xcat 'configeth: cannot resolve $hostname.'"); exit 1; }

if ($^O =~ /^aix/i) { 
        if ($ip =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/) {
            runcmd("chdev -l 'en$nic_num' -a netaddr=$ip -a netmask=$netmask -a state='up'");
        } else { #ipv6
            runcmd("autoconf6 -6i en$nic_num");
        }
}
elsif (($ENV{OSVER} && ($ENV{OSVER} =~ /sles|suse/i)) || (-f "/etc/SuSE-release")) { 
	# Write the info to the ifcfg file
	my $dir = "/etc/sysconfig/network";
	if (!open(FILE, ">$dir/ifcfg-$nic")) { system("logger -t xcat 'configeth: cannot open $dir/ifcfg-$nic.'"); exit 1; }
	# Not sure what is really REQUIRED from below -- copied the eth file from
	# the system
	print FILE "BOOTPROTO=\'static\'\n";
	print FILE "BROADCAST=\'\'\n";
	print FILE "ETHTOOL_OPTIONS=\'\'\n";
	print FILE "IPADDR=\'".$ip."\'\n";
	print FILE "MTU=\'\'\n";
	print FILE "NAME=\'\'\n";
	print FILE "NETMASK=\'".$netmask."\'\n";
	print FILE "NETWORK=\'\'\n";
	print FILE "REMOTE_IPADDR=\'\'\n";
	print FILE "STARTMODE=\'onboot\'\n";
	print FILE "UNIQUE=\'\'\n";
	print FILE "USERCONTROL=\'no\'\n";
	print FILE "_nm_name=\'static-0\'\n";

	close FILE;
	runcmd("ifup $nic");

        my $nic = 'eth0';
        # make file for eth0, too
	if (! -f "$dir/ifcfg-$nic") {
	    my $hostname = "$ENV{NODE}";
	    my $ip = &getipaddr($hostname);
	    if (!$ip) { system("logger -t xcat 'configeth: cannot resolve $hostname.'"); exit 1; }
	    
	    # Write the info to the ifcfg file
	    my $dir = "/etc/sysconfig/network";
	    if (!open(FILE, ">$dir/ifcfg-$nic")) { system("logger -t xcat 'configeth: cannot open $dir/ifcfg-$nic.'"); exit 1; }
	    # Not sure what is really REQUIRED from below -- copied the eth file from
	    # the system
	    print FILE "BOOTPROTO=\'static\'\n";
	    print FILE "BROADCAST=\'\'\n";
	    print FILE "ETHTOOL_OPTIONS=\'\'\n";
	    print FILE "IPADDR=\'".$ip."\'\n";
	    print FILE "MTU=\'\'\n";
	    print FILE "NAME=\'\'\n";
	    print FILE "NETMASK=\'".$netmask."\'\n";
	    print FILE "NETWORK=\'\'\n";
	    print FILE "REMOTE_IPADDR=\'\'\n";
	    print FILE "STARTMODE=\'onboot\'\n";
	    print FILE "UNIQUE=\'\'\n";
	    print FILE "USERCONTROL=\'no\'\n";
	    print FILE "_nm_name=\'static-0\'\n";
	    
	    close FILE;
	    runcmd("ifup $nic");
	}
}
else {
	# Write the info to the ifcfg file
	my $dir = "/etc/sysconfig/network-scripts";
	if (!open(FILE, ">$dir/ifcfg-$nic")) { system("logger -t xcat 'configeth: cannot open $dir/ifcfg-$nic.'"); exit 1; }
	print FILE "DEVICE=$nic\n";
	print FILE "BOOTPROTO=none\n";
	print FILE "IPADDR=$ip\n";
	print FILE "NETMASK=$netmask\n";
	if (defined($gateway)) { print FILE "GATEWAY=$gateway\n"; }
	print FILE "ONBOOT=yes\n";
	close FILE;

	runcmd("$dir/ifup $nic");
}
system("logger -t xcat 'configeth: successfully configured $nic.'");

exit 0;

sub runcmd {
	my $cmd = shift @_;
	$cmd .= ' 2>&1';
	my @output = `$cmd`;
	my $rc = $? >> 8;
	if ($rc) {
		system("logger -t xcat 'configeth: command $cmd failed with rc $rc: " . join('',@output) . "'");
		my $errout= "configeth: command $cmd failed with rc $rc.";
                echo $errout;
		exit $rc;
	}
}

#$master=$ENV{MASTER};
#if ($^O =~ /^aix/i) { }
#elsif (($ENV{OSVER} && ($ENV{OSVER} =~ /fedora/i)) || (-f "/etc/fedora-release")) { }
#elsif (($ENV{OSVER} && ($ENV{OSVER} =~ /sles|suse/i)) || (-f "/etc/SuSE-release")) { }
#$result=`grep "^SYSLOG_DAEMON=" $sysconfig 2>&1`;
#`logger -t xcat "Install: syslog setup"`;














