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# You may distribute under the terms of either the GNU General Public License
# or the Artistic License (the same terms as Perl itself)
#
# (C) Paul Evans, 2011 -- leonerd@leonerd.org.uk
package Socket::GetAddrInfo::Strict;
use strict;
use warnings;
use Carp;
our $VERSION = '0.22';
use Exporter 'import';
our @EXPORT_OK = qw(
getaddrinfo
getnameinfo
);
use Socket::GetAddrInfo ();
# Re-export all the AI_*, EAI_* and NI_* constants
my @constants = @{ $Socket::GetAddrInfo::EXPORT_TAGS{constants} };
push @EXPORT_OK, @constants;
Socket::GetAddrInfo->import( @constants );
=head1 NAME
C<Socket::GetAddrInfo::Strict> - Provide L<Socket::GetAddrInfo> functions
which throw exceptions
=head1 SYNOPSIS
use Socket qw( SOCK_STREAM );
use Socket::GetAddrInfo::Strict qw( getaddrinfo getnameinfo );
use IO::Socket;
my $sock;
my %hints = ( socktype => SOCK_STREAM );
my @res = getaddrinfo( "www.google.com", "www", \%hints );
while( my $ai = shift @res ) {
$sock = IO::Socket->new();
$sock->socket( $ai->{family}, $ai->{socktype}, $ai->{protocol} ) or
undef $sock, next;
$sock->connect( $ai->{addr} ) or undef $sock, next;
last;
}
if( $sock ) {
my ( $host, $service ) = getnameinfo( $sock->peername );
print "Connected to $host:$service\n";
}
=head1 DESCRIPTION
L<Socket::GetAddrInfo> provides the functions of C<getaddrinfo> and
C<getnameinfo>, which return lists whose first element is error value, or
false indicating no error occurred.
This module wraps the functions provided by C<Socket::GetAddrInfo> to check
this error value, and throw an exception (using C<die>) if an error occurred.
If not, then the remaining values are returned as normal. This can simplify
the logic of a program which otherwise simply throws its own exception on
failure anyway.
=cut
=head1 FUNCTIONS
=cut
=head2 @res = getaddrinfo( $host, $service, $hints )
After a successful lookup, returns the list of address structures, as
documented in L<Socket::GetAddrInfo>. If the lookup fails, an exception
containing the string form of the error is thrown instead.
=cut
sub getaddrinfo
{
my ( $err, @res ) = Socket::GetAddrInfo::getaddrinfo( @_ );
die "$err\n" if $err;
return @res;
}
=head2 ( $host, $service ) = getnameinfo( $addr, $flags, $xflags )
After a successful lookup, returns the host and service name, as
documented in L<Socket::GetAddrInfo>. If the lookup fails, an exception
containing the string form of the error is thrown instead.
=cut
sub getnameinfo
{
my ( $err, $host, $service ) = Socket::GetAddrInfo::getnameinfo( @_ );
die "$err\n" if $err;
return ( $host, $service );
}
=head1 AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
=cut
0x55AA;
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