package Ocsinventory::Agent::Backend::OS::BSD::Networks;

use strict;

sub check {
    my $params = shift;
    my $common = $params->{common};
    $common->can_run("ifconfig") && $common->can_load("Net::IP qw(:PROC)")
}


sub _ipdhcp {
  my $if = shift;

  my $path;
  my $ipdhcp;
  my $leasepath;

  foreach ( # XXX BSD paths
    "/var/db/dhclient.leases.%s",
    "/var/db/dhclient.leases",
    # Linux path for some kFreeBSD based GNU system
    "/var/lib/dhcp3/dhclient.%s.leases",
    "/var/lib/dhcp3/dhclient.%s.leases",
    "/var/lib/dhcp/dhclient.leases") {

    $leasepath = sprintf($_,$if);
    last if (-e $leasepath);
   }
  return undef unless -e $leasepath;

  if (open DHCP, $leasepath) {
    my $lease;
    my $dhcp;
    my $expire;
    # find the last lease for the interface with its expire date
    while(<DHCP>){
      $lease = 1 if(/lease\s*{/i);
      $lease = 0 if(/^\s*}\s*$/);
      if ($lease) { #inside a lease section
      if(/interface\s+"(.+?)"\s*/){
          $dhcp = ($1 =~ /^$if$/);
      }
      #Server IP
      if(/option\s+dhcp-server-identifier\s+(\d{1,3}(?:\.\d{1,3}){3})\s*;/
         and $dhcp){
          $ipdhcp = $1;
      }
      if (/^\s*expire\s*\d\s*(\d*)\/(\d*)\/(\d*)\s*(\d*):(\d*):(\d*)/
          and $dhcp) {
          $expire=sprintf "%04d%02d%02d%02d%02d%02d",$1,$2,$3,$4,$5,$6;
      }
      }
  }
    close DHCP or warn;
    chomp (my $currenttime = `date +"%Y%m%d%H%M%S"`);
    undef $ipdhcp unless $currenttime <= $expire;
} else {
    warn "Can't open $leasepath\n";
}
  return $ipdhcp;
}

# Initialise the distro entry
sub run {
    my $params = shift;
    my $common = $params->{common};
  
    my $description;
    my $ipaddress;
    my $ipgateway;
    my $ipmask;
    my $ipsubnet;
    my $macaddr;
    my $status;
    my $type;
  
    
    # Looking for the gateway
    # 'route show' doesn't work on FreeBSD so we use netstat
    # XXX IPV4 only
    for (`netstat -nr -f inet`){
        $ipgateway=$1 if /^default\s+(\S+)/i;
    }
  
    my @ifconfig = `ifconfig -a`; # -a option required on *BSD

    # first make the list available interfaces
    # too bad there's no -l option on OpenBSD
    my @list;
    foreach (@ifconfig){
        # skip loopback, pseudo-devices and point-to-point interfaces
        next if /^(lo|fwe|vmnet|sit|pflog|pfsync|enc|strip|plip|sl|ppp)\d+/;
        if (/^(\S+):/) { push @list , $1; } # new interface name      
    }
  
    # for each interface get it's parameters
    foreach $description (@list) {
        $ipaddress = $ipmask = $macaddr = $status =  $type = undef;
        # search interface infos
        @ifconfig = `ifconfig $description`;
        foreach (@ifconfig){
            $ipaddress = $1 if /inet (\S+)/i;
            $ipmask = $1 if /netmask\s+(\S+)/i;
            $macaddr = $2 if /(address:|ether|lladdr)\s+(\S+)/i;
            $status = 1 if /<UP/i;
            $type = $1 if /media:\s+(\S+)/i;
        }
        my $binip = &ip_iptobin ($ipaddress ,4);
        # In BSD, netmask is given in hex form
        my $binmask = sprintf("%b", oct($ipmask));
        my $binsubnet = $binip & $binmask;
        $ipsubnet = ip_bintoip($binsubnet,4);
  
        $common->addNetwork({
            DESCRIPTION => $description,
            IPADDRESS => $ipaddress,
            IPDHCP => _ipdhcp($description),
            IPGATEWAY => ($status?$ipgateway:undef),
            IPMASK => $ipmask,
            IPSUBNET => ($status?$ipsubnet:undef),
            MACADDR => $macaddr,
            STATUS => $status?"Up":"Down",
            TYPE => $type
        });
    }
}

1;
