#!/usr/bin/perl

use strict;

use warnings;

use Test::More;

use IO::Socket::IP;

use IO::Socket::INET;

use Socket qw( inet_aton inet_ntoa pack_sockaddr_in unpack_sockaddr_in );

# Some odd locations like BSD jails might not like INADDR_LOOPBACK. We'll

# establish a baseline first to test against

my $INADDR_LOOPBACK = do {

   socket my $sockh, PF_INET, SOCK_STREAM, 0 or die "Cannot socket(PF_INET) - $!";

   bind $sockh, pack_sockaddr_in( 0, inet_aton( "127.0.0.1" ) ) or die "Cannot bind() - $!";

   ( unpack_sockaddr_in( getsockname $sockh ) )[1];

};

my $INADDR_LOOPBACK_HOST = inet_ntoa( $INADDR_LOOPBACK );

if( $INADDR_LOOPBACK ne INADDR_LOOPBACK ) {

   diag( "Testing with INADDR_LOOPBACK=$INADDR_LOOPBACK_HOST; this may be because of odd networking" );

}

my $INADDR_LOOPBACK_HEX = unpack "H*", $INADDR_LOOPBACK;

foreach my $socktype (qw( SOCK_STREAM SOCK_DGRAM )) {

   my $testserver = IO::Socket::IP->new(

      ( $socktype eq "SOCK_STREAM" ? ( Listen => 1 ) : () ),

      LocalHost => "127.0.0.1",

      LocalPort => "0",

      Type      => Socket->$socktype,

   );

   ok( defined $testserver, "IO::Socket::IP->new constructs a $socktype socket" ) or

      diag( "  error was $@" );

   is( $testserver->sockdomain, AF_INET,           "\$testserver->sockdomain for $socktype" );

   is( $testserver->socktype,   Socket->$socktype, "\$testserver->socktype for $socktype" );

   is( $testserver->sockhost, $INADDR_LOOPBACK_HOST, "\$testserver->sockhost for $socktype" );

   like( $testserver->sockport, qr/^\d+$/, "\$testserver->sockport for $socktype" );

   ok( eval { $testserver->peerport; 1 }, "\$testserver->peerport does not die for $socktype" )

      or do { chomp( my $e = $@ ); diag( "Exception was: $e" ) };

   is_deeply( { host => $testserver->peerhost, port => $testserver->peerport },

              { host => undef, port => undef },

      'peerhost/peersock yield scalar' );

   my $socket = IO::Socket::INET->new(

      PeerHost => "127.0.0.1",

      PeerPort => $testserver->sockport,

      Type     => Socket->$socktype,

      Proto    => ( $socktype eq "SOCK_STREAM" ? "tcp" : "udp" ), # Because IO::Socket::INET is stupid and always presumes tcp

   ) or die "Cannot connect to PF_INET - $@";

   my $testclient = ( $socktype eq "SOCK_STREAM" ) ? 

      $testserver->accept : 

      do { $testserver->connect( $socket->sockname ); $testserver };

   ok( defined $testclient, "accepted test $socktype client" );

   isa_ok( $testclient, "IO::Socket::IP", "\$testclient for $socktype" );

   is( $testclient->sockdomain, AF_INET,           "\$testclient->sockdomain for $socktype" );

   is( $testclient->socktype,   Socket->$socktype, "\$testclient->socktype for $socktype" );

   is_deeply( [ unpack_sockaddr_in $socket->sockname ],

              [ unpack_sockaddr_in $testclient->peername ],

              "\$socket->sockname for $socktype" );

   is_deeply( [ unpack_sockaddr_in $socket->peername ],

              [ unpack_sockaddr_in $testclient->sockname ],

              "\$socket->peername for $socktype" );

   is( $testclient->sockport, $socket->peerport, "\$testclient->sockport for $socktype" );

   is( $testclient->peerport, $socket->sockport, "\$testclient->peerport for $socktype" );

   # Unpack just so it pretty prints without wrecking the terminal if it fails

   is( unpack("H*", $testclient->sockaddr), $INADDR_LOOPBACK_HEX, "\$testclient->sockaddr for $socktype" );

   is( unpack("H*", $testclient->peeraddr), $INADDR_LOOPBACK_HEX, "\$testclient->peeraddr for $socktype" );

}

done_testing;