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

# xCAT post script for configuring additional ethernet nics. Information is
# retreieved from nics table. Environment variables are set in the postscript
# The nic (i.e. eth1, en1) is passed as the only argument.
# Environment variables are set in the postscript in the mypostscript.tmpl
# file on the management node:
# 
#
# NICNODE - the name of the node minus the NICHOSTNAMESUFFIXES
# NICIPS  - the ip address for this nic
# NICTYPES - for configeth - this must be ethernet
# NICCUSTOMSCRIPTS - parsed in confignics to invoke this script if set. (not used here)
# NICNETWORKS - the network this nic is attached to. Must also verify this network is 
#               set in the networks table.

use strict;
use Socket;

my $nic = shift(@ARGV);
my $nicips = $ENV{NICIPS};
my $nicnetworks = $ENV{NICNETWORKS};
my $nicnode = $ENV{NICNODE};
my $net_cnt = $ENV{NETWORKS_LINES};

my $netmask ='';
my $ipaddr = '';
my $nic_num = '';
my $subnet = '';
my $gateway = ''; # this is only used for ipv6, ipv4 gateway is assigned by dhcp
my $ipv4nic = 0;
my $nic_net = '';
my $net_name = '';
my @nic_nets_all = (); # array of all networks for this nic
my @nic_nets4 = (); # array of ipv4 networks for this nic
my @nic_nets6 = (); # array of ipv6 networks for this nic
my @nic_ips_all =();   # array of all ip addresses for this nic
my @nic_ips4 =();   # array of ipv4 addresses for this nic
my @nic_ips6 =();   # array of ipv6 addresses for this nic
my @networks = (); # array of all networks from networks table.
                   # { network_name, subnet, netmask }

system("logger -t xcat -p local4.err  'configeth: NIC:                  $nic'");
system("logger -t xcat -p local4.err  'configeth: NICNETWORKS:          $nicnetworks'");
system("logger -t xcat -p local4.err  'configeth: NICIPS:               $nicips'");

# create array of network info. Needed in case where there are 
# more than one ip address per nic and shouldn't be many networks.
my $net_info;
my $cnt = 1;

while ( $cnt <= $net_cnt ) {
    $net_info = $ENV{"NETWORKS_LINE$cnt"};
    $net_info =~ /^netname=([^\|]*)\|\|/; 
    $net_name = $1;
    $net_info =~ /net=([^\|]*)\|\|/;
    $subnet = $1;
    $net_info =~ /mask=([^\|]*)\|\|/;
    $netmask = $1;
    $net_info =~ /gateway=([^\|]*)\|\|/;
    $gateway = $1;
    push @{ $networks[$cnt-1] }, ($net_name, $subnet, $netmask, $gateway);
    $cnt +=1; 
}

# get network or networks for this nic from NICNETWORKS: 
# eth0:1_0_0_0-255_255_0_0|network2,eth1:1_1_0_0
# create array of networks for this nic
foreach my $nic_networks (split(/,/,$nicnetworks)) {
    my @net = ();
    if ( $nic_networks =~ /!/ ) {
        @net = split(/!/,$nic_networks);
    } else {
        @net = split(/:/,$nic_networks);
    }
    if ($net[0] eq $nic) {
        @nic_nets_all = split(/\|/,$net[1]);
        last;
    }
}

# Put all ipv4 nets into nic_nets4,
# put all ipv6 nets into nic_nets6.
my $i = 0;
for ($i=0; $i < (scalar @nic_nets_all) ; $i++ ) {
    # The network name itself does not indicate ipv4 or ipv6
    # should use the subnet to determine.
    # Do not use foreach (@networks), needs to keep the order of nets and ips
    my $net = $nic_nets_all[$i];
    foreach my $netinfo (@networks)
    {
        if ($netinfo->[0] eq $net)
        {
            if ($netinfo->[1] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/)
            {
                push @nic_nets4, $net;
            } elsif ($netinfo->[1] =~ /:/) {
                push @nic_nets6, $net;
            } else {
                system("logger -t xcat -p local4.err  'The subnet $net is not valid.'");
            }
            last;
        }
    }
}
# get all nic ipaddress from $nicips: i.e. eth0:1.0.0.1|2.0.0.1,eth1:1.1.1.1
# Then get all ips for this specific nic, i.e. eth0.
foreach my $ips (split(/,/,$nicips)) {
    my @ip = ();
    if ( $ips =~ /!/ ) {
        @ip = split(/!/,$ips);
    } else {
        @ip = split(/:/,$ips);
    }
    if ($ip[0] eq $nic ) {
        @nic_ips_all = split(/\|/,$ip[1]);
    }
}

# Put all ipv4 addresses in @nic_ips4,
# put all ipv6 addresses in @nic_ips6.
# Do not use forach, needs to keep the order of networks and ips
for ($i=0; $i < (scalar @nic_ips_all) ; $i++ ) {
    my $ip = $nic_ips_all[$i];
    # ipv4 address
    if ($ip =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/) {
        push @nic_ips4, $ip;
    } elsif ($ip =~ /:/) { # ipv6
        push @nic_ips6, $ip;
    } else {
        system("logger -t xcat -p local4.err  'configeth: The ip address $ip is not valid.'");
    }
}

for ($i=0; $i < (scalar @nic_ips4) ; $i++ ) {

    # ipv6 configuration needs to know if this nic as ipv4 configured
    $ipv4nic = 1;

    # Time to create the interfaces.
    # loop through the nic networks, find the matching networks to get the
    # subnet and netmask and then create the appropriate ifcfg file for linux
    # or invoke correct AIX command.
    my $specific_nic = $nic;
    if ($i > 0) {
       $specific_nic = $nic . ":" . ($i);
    }

    $cnt = 0;
    $subnet = "";
    $netmask = "";
    $net_name = "";
    while ( $cnt < $net_cnt ) {
        if ( $networks[$cnt][0] eq $nic_nets4[$i] ) {
        
            $subnet = $networks[$cnt][1];
            $netmask = $networks[$cnt][2];
            $cnt = $net_cnt; # found match - get out.
        } 
        else {
            $cnt++; 
        }
    }

    # check that there is a subnet and netmask set
    if ( !(length($subnet) > 0) || !(length($netmask) > 0) ) {
        system("logger -t xcat -p local4.err  'configeth: network subnet or netmask not set.'");
        exit 1;
    }

    if ($^O =~ /^aix/i) {
        if ($i == 0) {
            if ($nic_ips4[$i] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/) {
                runcmd("chdev -l '$nic' -a netaddr=$nic_ips4[$i] -a netmask=$netmask -a state='up'");
    #       } else { #ipv6
    #           runcmd("autoconf6 -6i en$nic_num");
            }
        } else {
            if ($nic_ips4[$i] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/) {
                runcmd("chdev -l '$nic' -a alias4=$nic_ips4[$i],$netmask");
    #       } else { #ipv6
    #           runcmd("autoconf6 -6i en$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 ($i == 0 ) {
            if (!open(FILE, ">$dir/ifcfg-$nic")) { system("logger -t xcat -p local4.err '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 "DEVICE=\'$nic\'\n";
            print FILE "BOOTPROTO=\'static\'\n";
            print FILE "NM_CONTROLLED=\'no\'\n";
            print FILE "BROADCAST=\'\'\n";
            print FILE "ETHTOOL_OPTIONS=\'\'\n";
            print FILE "IPADDR=\'".$nic_ips4[$i]."\'\n";
            print FILE "MTU=\'\'\n";
            print FILE "NAME=\'\'\n";
            print FILE "NETMASK=\'".$netmask."\'\n";
            print FILE "NETWORK=\'".$subnet."\'\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";
        
        } else {
            # on suse/sles the ip alias info goes into the same file as the base ip info.
            # open ifconfig-eth file and append additional info.
            if (!open(FILE, ">>$dir/ifcfg-$nic")) { system("logger -t xcat -p local4.err 'configeth: cannot open $dir/ifcfg-$nic for appending ip alias info'"); exit 1; }
                
            print FILE "IPADDR_$i=\'".$nic_ips4[$i]."\'\n";
            print FILE "NETMASK_$i=\'".$netmask."\'\n";
            print FILE "NETWORK_$i=\'".$subnet."\'\n";
            print FILE "LABEL_$i=\'".$i."\'\n";
        }
        close FILE;
        runcmd("ifup $nic");
    }
    else {
        # Write the info to the ifcfg file for redhat 
        my $dir = "/etc/sysconfig/network-scripts";
        if (!open(FILE, ">$dir/ifcfg-$specific_nic")) { system("logger -t xcat -p local4.err 'configeth: cannot open $dir/ifcfg-$specific_nic.'"); exit 1; }
        print FILE "DEVICE=$specific_nic\n";
        print FILE "BOOTPROTO=none\n";
        print FILE "NM_CONTROLLED=no\n";
        print FILE "IPADDR=$nic_ips4[$i]\n";
        print FILE "NETMASK=$netmask\n";
        #if (defined($gateway)) { print FILE "GATEWAY=$gateway\n"; }
        print FILE "ONBOOT=yes\n";
        close FILE;

        runcmd("$dir/ifup $specific_nic");
    }
#    system("logger -t xcat -p local4.info 'configeth: successfully configured $specific_nic.'");
}


# ipv6 configuration
# ipv6 address does not use the nic alias like eth0:1,
# should use the main nic like eth0
my $configured = 0;
for ($i=0; $i < (scalar @nic_ips6) ; $i++ )
{
    # Get the network information: netname, subnet, netmask
    my $found = 0;
    my $subnet;
    my $prefixlen;
    my $ipv6gateway;
    my $ip6addr = $nic_ips6[$i];
    my $net = $nic_nets6[$i];
    foreach my $netinfo (@networks)
    {
        if ($netinfo->[0] eq $net)
        { 
            $found = 1;
            $subnet = $netinfo->[1];
            $prefixlen = $netinfo->[2];
            $ipv6gateway = $netinfo->[3];
        }
        # Remove the postfix like /64 from subnet
        if ($subnet && ($subnet =~ /\//)) {
            $subnet =~ s/\/.*$//;
        }

        # Remove the "/" from prefixlen
        if ($prefixlen && ($prefixlen =~ /^\//))
        {
            $prefixlen =~ s/^\///;
        }
    }
    if ($found == 0)
    {
        system("logger -t xcat -p local4.err 'configeth: Could not find network entry for ip address $ip6addr'");
        next;
    }

    if ($^O =~ /^aix/i) {
        if (!$configured)
        {
            runcmd("chdev -l en0 -a netaddr6=$ip6addr -a prefixlen=$prefixlen -a state=up");
            $configured = 1;
        } else {
            runcmd("chdev -l en0 -a alias6=$ip6addr/$prefixlen");
        }
    } elsif (($ENV{OSVER} && ($ENV{OSVER} =~ /sles|suse/i)) || (-f "/etc/SuSE-release")) {
        my $dir = "/etc/sysconfig/network";
        # If there are only ipv6 addresses on this nic,
        # needs to flush the ifcfg-$nic file when configuring the first ipv6 addr,
        # to avoid duplicate entries when run confignics/configeth multiple times.
        if (!$ipv4nic && !$configured)
        {
            if (!open(FILE, ">$dir/ifcfg-$nic")) {
                system("logger -t xcat -p local4.err 'configeth: cannot open $dir/ifcfg-$nic.'");
                exit 1;
            }
            print FILE "DEVICE=$nic\n";
            print FILE "BOOTPROTO=static\n";
            print FILE "NM_CONTROLLED=no\n";
            print FILE "STARTMODE=onboot\n";
        } else {
            if (!open(FILE, ">>$dir/ifcfg-$nic")) {
                system("logger -t xcat -p local4.err 'configeth: cannot open $dir/ifcfg-$nic.'");
                exit 1;
            }
        }
        # Use the label=ipv6$i in ifcfg-ethx file, like ipv60, ipv61
        print FILE "LABEL_ipv6$i=ipv6$i\n";
        print FILE "IPADDR_ipv6$i=$ip6addr\n";
        print FILE "PREFIXLEN_ipv6$i=$prefixlen\n";
        close FILE;
        if ($ipv6gateway && $ipv6gateway !~ /xcatmaster/) {
            # Do not add duplicate entries
            `grep -E "default\\s+$ipv6gateway\\s+" /etc/sysconfig/network/routes 2>&1 1>/dev/null`;
            if ($? != 0) {
            `echo "default $ipv6gateway - -" >> /etc/sysconfig/network/routes`;
            }
        }
        runcmd("ifup $nic");
    } else {
        # Ubuntu TODO
        my $dir = "/etc/sysconfig/network-scripts";
        # If there are only ipv6 addresses on this nic,
        # needs to flush the ifcfg-$nic file when configuring the first ipv6 addr,
        # to avoid duplicate entries when run confignics/configeth multiple times.
        if (!$ipv4nic && !$configured)
        {
            if (!open(FILE, ">$dir/ifcfg-$nic")) { 
                system("logger -t xcat -p local4.err 'configeth: cannot open $dir/ifcfg-$nic.'"); 
                exit 1;
            }
            print FILE "DEVICE=$nic\n";
            print FILE "BOOTPROTO=none\n";
            print FILE "NM_CONTROLLED=no\n";
            print FILE "ONBOOT=yes\n";
        } else {
            if (!open(FILE, ">>$dir/ifcfg-$nic")) { 
                system("logger -t xcat -p local4.err 'configeth: cannot open $dir/ifcfg-$nic.'"); 
                exit 1;
            }
        }
        if (!$configured) {
            print FILE "IPV6INIT=yes\n";
            print FILE "IPV6ADDR=$ip6addr/$prefixlen\n";
            $configured = 1;
        } else {
            print FILE "IPV6ADDR_SECONDARIES=$ip6addr/$prefixlen\n";
        }
        if ($ipv6gateway && $ipv6gateway !~ /xcatmaster/) {
            print FILE "IPV6_DEFAULTGW=$ipv6gateway\n";
        }
        close FILE;
        runcmd("$dir/ifup-ipv6 $nic");
    }
}
exit 0;

sub runcmd {
	my $cmd = shift @_;
	$cmd .= ' 2>&1';
	my @output = `$cmd`;
	my $rc = $? >> 8;
	if ($rc) {
		system("logger -t xcat -p local4.err 'configeth: command $cmd failed with rc $rc: " . join('',@output) . "'");
		my $errout= "configeth: command $cmd failed with rc $rc.";
                `echo $errout`;
		exit $rc;
	}
}