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Code Editor : INET6.pm
# IO::Socket::INET6.pm # # Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights reserved. # This program is free software; you can redistribute it and/or # modify it under the same terms as Perl itself. # # Modified by Rafael Martinez-Torres <rafael.martinez@novagnet.com> # Euro6IX project (www.euro6ix.org) 2003. package IO::Socket::INET6; use strict; use warnings; use 5.008; our(@ISA, $VERSION); # Do it so we won't import any symbols from IO::Socket which it does export # by default: # # <LeoNerd> IO::Socket is stupidstupidstupid beyond belief. Despite being an # object class, it has an import method # <LeoNerd> So you have to use IO::Socket (); # <LeoNerd> Having done that, this test is now clean use IO::Socket (); use Socket (qw( AF_INET6 PF_INET6 SOCK_RAW SOCK_STREAM INADDR_ANY SOCK_DGRAM AF_INET SO_REUSEADDR SO_REUSEPORT AF_UNSPEC SO_BROADCAST sockaddr_in ) ); # IO::Socket and Socket already import stuff here - possibly AF_INET6 # and PF_INET6 so selectively import things from Socket6. use Socket6 ( qw(AI_PASSIVE getaddrinfo sockaddr_in6 unpack_sockaddr_in6_all pack_sockaddr_in6_all in6addr_any) ); use Carp; use Errno; @ISA = qw(IO::Socket); $VERSION = "2.72"; #Purpose: allow protocol independent protocol and original interface. my $EINVAL = exists(&Errno::EINVAL) ? Errno::EINVAL() : 1; IO::Socket::INET6->register_domain( AF_INET6 ); my %socket_type = ( tcp => SOCK_STREAM, udp => SOCK_DGRAM, icmp => SOCK_RAW ); sub new { my $class = shift; unshift(@_, "PeerAddr") if @_ == 1; return $class->SUPER::new(@_); } # Parsing analysis: # addr,port,and proto may be syntactically related... sub _sock_info { my($addr,$port,$proto) = @_; my $origport = $port; my @proto = (); my @serv = (); if (defined $addr) { if (!Socket6::inet_pton(AF_INET6,$addr)) { if($addr =~ s,^\[([\da-fA-F:]+)\]:([\w\(\)/]+)$,$1,) { $port = $2; } elsif($addr =~ s,^\[(::[\da-fA-F.:]+)\]:([\w\(\)/]+)$,$1,) { $port = $2; } elsif($addr =~ s,^\[([\da-fA-F:]+)\],$1,) { $port = $origport; } elsif($addr =~ s,:([\w\(\)/]+)$,,) { $port = $1 } } } # $proto as "string". if(defined $proto && $proto =~ /\D/) { if(@proto = getprotobyname($proto)) { $proto = $proto[2] || undef; } else { $@ = "Bad protocol '$proto'"; return; } } if(defined $port) { my $defport = ($port =~ s,\((\d+)\)$,,) ? $1 : undef; my $pnum = ($port =~ m,^(\d+)$,)[0]; @serv = getservbyname($port, $proto[0] || "") if ($port =~ m,\D,); $port = $serv[2] || $defport || $pnum; unless (defined $port) { $@ = "Bad service '$origport'"; return; } $proto = (getprotobyname($serv[3]))[2] || undef if @serv && !$proto; } #printf "Selected port is $port and proto is $proto \n"; return ($addr || undef, $port || undef, $proto || undef, ); } sub _error { my $sock = shift; my $err = shift; { local($!); my $title = ref($sock).": "; $@ = join("", $_[0] =~ /^$title/ ? "" : $title, @_); close($sock) if(defined fileno($sock)); } $! = $err; return undef; } sub configure { my($sock,$arg) = @_; $arg->{LocalAddr} = $arg->{LocalHost} if exists $arg->{LocalHost} && !exists $arg->{LocalAddr}; $arg->{PeerAddr} = $arg->{PeerHost} if exists $arg->{PeerHost} && !exists $arg->{PeerAddr}; my $family = $arg->{Domain}; # in case no local and peer is given we prefer AF_INET6 # because we are IO::Socket::INET6 $family ||= ! $arg->{LocalAddr} && ! $arg->{PeerAddr} && AF_INET6 || AF_UNSPEC; # parse Local* my ($laddr,$lport,$proto) = _sock_info( $arg->{LocalAddr}, $arg->{LocalPort}, $arg->{Proto} ) or return _error($sock, $!, "sock_info: $@"); $laddr ||= ''; $lport ||= 0; $proto ||= (getprotobyname('tcp'))[2]; # MSWin32 expects at least one of $laddr or $lport to be specified # and does not accept 0 for $lport if $laddr is specified. if ($^O eq 'MSWin32') { if ((!$laddr) && (!$lport)) { $laddr = ($family == AF_INET) ? '0.0.0.0' : '::'; $lport = ''; } elsif (!$lport) { $lport = ''; } } my $type = $arg->{Type} || $socket_type{(getprotobynumber($proto))[0]}; # parse Peer* my($rport,$raddr); unless(exists $arg->{Listen}) { ($raddr,$rport) = _sock_info( $arg->{PeerAddr}, $arg->{PeerPort}, $proto ) or return _error($sock, $!, "sock_info: $@"); } # find out all combinations of local and remote addr with # the same family my @lres = getaddrinfo($laddr,$lport,$family,$type,$proto,AI_PASSIVE); return _error($sock, $EINVAL, "getaddrinfo: $lres[0]") if @lres<5; my @rres; if ( defined $raddr ) { @rres = getaddrinfo($raddr,$rport,$family,$type,$proto); return _error($sock, $EINVAL, "getaddrinfo: $rres[0]") if @rres<5; } my @flr; if (@rres) { # Collect all combinations with the same family in lres and rres # the order we search should be defined by the order of @rres, # not @lres! for( my $r=0;$r<@rres;$r+=5 ) { for( my $l=0;$l<@lres;$l+=5) { my $fam_listen = $lres[$l]; next if $rres[$r] != $fam_listen; # must be same family push @flr,[ $fam_listen,$lres[$l+3],$rres[$r+3] ]; } } } else { for( my $l=0;$l<@lres;$l+=5) { my $fam_listen = $lres[$l]; my $lsockaddr = $lres[$l+3]; # collect only the binding side push @flr,[ $fam_listen,$lsockaddr ]; } } # try to bind and maybe connect # if multihomed try all combinations until success for my $flr (@flr) { my ($family,$lres,$rres) = @$flr; if ( $family == AF_INET6) { if ($arg->{LocalFlow} || $arg->{LocalScope}) { my @sa_in6 = unpack_sockaddr_in6_all($lres); $sa_in6[1] = $arg->{LocalFlow} || 0; $sa_in6[3] = _scope_ntohl($arg->{LocalScope}) || 0; $lres = pack_sockaddr_in6_all(@sa_in6); } } $sock->socket($family, $type, $proto) or return _error($sock, $!, "socket: $!"); if (defined $arg->{Blocking}) { defined $sock->blocking($arg->{Blocking}) or return _error($sock, $!, "sockopt: $!"); } if ($arg->{Reuse} || $arg->{ReuseAddr}) { $sock->sockopt(SO_REUSEADDR,1) or return _error($sock, $!, "sockopt: $!"); } if ($arg->{ReusePort}) { $sock->sockopt(SO_REUSEPORT,1) or return _error($sock, $!, "sockopt: $!"); } if ($arg->{Broadcast}) { $sock->sockopt(SO_BROADCAST,1) or return _error($sock, $!, "sockopt: $!"); } if ( $family == AF_INET ) { my ($p,$a) = sockaddr_in($lres); $sock->bind($lres) or return _error($sock, $!, "bind: $!") if ($a ne INADDR_ANY or $p!=0); } else { my ($p,$a) = sockaddr_in6($lres); $sock->bind($lres) or return _error($sock, $!, "bind: $!") if ($a ne in6addr_any or $p!=0); } if(exists $arg->{Listen}) { $sock->listen($arg->{Listen} || 5) or return _error($sock, $!, "listen: $!"); } # connect only if PeerAddr and thus $rres is given last if ! $rres; if ( $family == AF_INET6) { if ($arg->{PeerFlow} || $arg->{PeerScope}) { my @sa_in6 = unpack_sockaddr_in6_all($rres); $sa_in6[1] = $arg->{PeerFlow} || 0; $sa_in6[3] = _scope_ntohl($arg->{PeerScope}) || 0; $rres = pack_sockaddr_in6_all(@sa_in6); } } undef $@; last if $sock->connect($rres); return _error($sock, $!, $@ || "Timeout") if ! $arg->{MultiHomed}; } return $sock; } sub _scope_ntohl($) { # As of Socket6 0.17 the scope field is incorrectly put into # network byte order when it should be in host byte order # in the sockaddr_in6 structure. We correct for that here. if ((Socket6->VERSION <= 0.17) && (pack('s', 0x1234) ne pack('n', 0x1234))) { unpack('N', pack('V', $_[0])); } else { $_[0]; } } sub sockdomain { my $sock = shift; $sock->SUPER::sockdomain(@_) || AF_INET6; } sub accept { my $sock = shift; my ($new, $peer) = $sock->SUPER::accept(@_); return unless defined($new); ${*$new}{io_socket_domain} = ${*$sock}{io_socket_domain}; ${*$new}{io_socket_type} = ${*$sock}{io_socket_type}; ${*$new}{io_socket_proto} = ${*$sock}{io_socket_proto}; return wantarray ? ($new, $peer) : $new; } sub bind { @_ == 2 or croak 'usage: $sock->bind(NAME) '; my $sock = shift; return $sock->SUPER::bind( shift ); } sub connect { @_ == 2 or croak 'usage: $sock->connect(NAME) '; my $sock = shift; return $sock->SUPER::connect( shift ); } sub sockaddr { @_ == 1 or croak 'usage: $sock->sockaddr()'; my ($sock) = @_; return undef unless (my $name = $sock->sockname); ($sock->sockdomain == AF_INET) ? (sockaddr_in($name))[1] : (sockaddr_in6($name))[1]; } sub sockport { @_ == 1 or croak 'usage: $sock->sockport()'; my($sock) = @_; return undef unless (my $name = $sock->sockname); ($sock->sockdomain == AF_INET) ? (sockaddr_in($name))[0] : (sockaddr_in6($name))[0]; } sub sockhost { @_ == 1 or croak 'usage: $sock->sockhost()'; my ($sock) = @_; return undef unless (my $addr = $sock->sockaddr); Socket6::inet_ntop($sock->sockdomain, $addr); } sub sockflow { @_ == 1 or croak 'usage: $sock->sockflow()'; my ($sock) = @_; return undef unless (my $name = $sock->sockname); ($sock->sockdomain == AF_INET6) ? (unpack_sockaddr_in6_all($name))[1] : 0; } sub sockscope { @_ == 1 or croak 'usage: $sock->sockscope()'; my ($sock) = @_; return undef unless (my $name = $sock->sockname); _scope_ntohl(($sock->sockdomain == AF_INET6) ? (unpack_sockaddr_in6_all($name))[3] : 0); } sub peeraddr { @_ == 1 or croak 'usage: $sock->peeraddr()'; my ($sock) = @_; return undef unless (my $name = $sock->peername); ($sock->sockdomain == AF_INET) ? (sockaddr_in($name))[1] : (sockaddr_in6($name))[1]; } sub peerport { @_ == 1 or croak 'usage: $sock->peerport()'; my($sock) = @_; return undef unless (my $name = $sock->peername); ($sock->sockdomain == AF_INET) ? (sockaddr_in($name))[0] : (sockaddr_in6($name))[0]; } sub peerhost { @_ == 1 or croak 'usage: $sock->peerhost()'; my ($sock) = @_; return undef unless (my $addr = $sock->peeraddr); Socket6::inet_ntop($sock->sockdomain, $addr); } sub peerflow { @_ == 1 or croak 'usage: $sock->peerflow()'; my ($sock) = @_; return undef unless (my $name = $sock->peername); _scope_ntohl(($sock->sockdomain == AF_INET6) ? (unpack_sockaddr_in6_all($name))[1] : 0); } sub peerscope { @_ == 1 or croak 'usage: $sock->peerscope()'; my ($sock) = @_; return undef unless (my $name = $sock->peername); ($sock->sockdomain == AF_INET6) ? (unpack_sockaddr_in6_all($name))[3] : 0; } 1; __END__ =head1 NAME IO::Socket::INET6 - Object interface for AF_INET/AF_INET6 domain sockets =head1 SYNOPSIS use IO::Socket::INET6; =head1 DESCRIPTION C<IO::Socket::INET6> provides an object interface to creating and using sockets in either AF_INET or AF_INET6 domains. It is built upon the L<IO::Socket> interface and inherits all the methods defined by L<IO::Socket>. =head1 CONSTRUCTOR =over 4 =item new ( [ARGS] ) Creates an C<IO::Socket::INET6> object, which is a reference to a newly created symbol (see the C<Symbol> package). C<new> optionally takes arguments, these arguments are in key-value pairs. In addition to the key-value pairs accepted by L<IO::Socket>, C<IO::Socket::INET6> provides. Domain Address family AF_INET | AF_INET6 | AF_UNSPEC (default) PeerAddr Remote host address <hostname>[:<port>] PeerHost Synonym for PeerAddr PeerPort Remote port or service <service>[(<no>)] | <no> PeerFlow Remote flow information PeerScope Remote address scope LocalAddr Local host bind address hostname[:port] LocalHost Synonym for LocalAddr LocalPort Local host bind port <service>[(<no>)] | <no> LocalFlow Local host flow information LocalScope Local host address scope Proto Protocol name (or number) "tcp" | "udp" | ... Type Socket type SOCK_STREAM | SOCK_DGRAM | ... Listen Queue size for listen ReuseAddr Set SO_REUSEADDR before binding Reuse Set SO_REUSEADDR before binding (deprecated, prefer ReuseAddr) ReusePort Set SO_REUSEPORT before binding Broadcast Set SO_BROADCAST before binding Timeout Timeout value for various operations MultiHomed Try all addresses for multi-homed hosts Blocking Determine if connection will be blocking mode If C<Listen> is defined then a listen socket is created, else if the socket type, which is derived from the protocol, is SOCK_STREAM then connect() is called. Although it is not illegal, the use of C<MultiHomed> on a socket which is in non-blocking mode is of little use. This is because the first connect will never fail with a timeout as the connect call will not block. The C<PeerAddr> can be a hostname, the IPv6-address on the "2001:800:40:2a05::10" form , or the IPv4-address on the "213.34.234.245" form. The C<PeerPort> can be a number or a symbolic service name. The service name might be followed by a number in parenthesis which is used if the service is not known by the system. The C<PeerPort> specification can also be embedded in the C<PeerAddr> by preceding it with a ":", and closing the IPv6 address on brackets "[]" if necessary: "124.678.12.34:23","[2a05:345f::10]:23","any.server.com:23". If C<Domain> is not given, AF_UNSPEC is assumed, that is, both AF_INET and AF_INET6 will be both considered when resolving DNS names. AF_INET6 has priority. If you guess you are in trouble not reaching the peer,(the service is not available via AF_INET6 but AF_INET) you can either try Multihomed (try any address/family until reach) or concrete your address C<family> (AF_INET, AF_INET6). If C<Proto> is not given and you specify a symbolic C<PeerPort> port, then the constructor will try to derive C<Proto> from the service name. As a last resort C<Proto> "tcp" is assumed. The C<Type> parameter will be deduced from C<Proto> if not specified. If the constructor is only passed a single argument, it is assumed to be a C<PeerAddr> specification. If C<Blocking> is set to 0, the connection will be in nonblocking mode. If not specified it defaults to 1 (blocking mode). Examples: $sock = IO::Socket::INET6->new(PeerAddr => 'www.perl.org', PeerPort => 'http(80)', Proto => 'tcp'); Suppose either you have no IPv6 connectivity or www.perl.org has no http service on IPv6. Then, (Trying all address/families until reach) $sock = IO::Socket::INET6->new(PeerAddr => 'www.perl.org', PeerPort => 'http(80)', Multihomed => 1 , Proto => 'tcp'); (Concrete to IPv4 protocol) $sock = IO::Socket::INET6->new(PeerAddr => 'www.perl.org', PeerPort => 'http(80)', Domain => AF_INET , Proto => 'tcp'); $sock = IO::Socket::INET6->new(PeerAddr => 'localhost:smtp(25)'); $sock = IO::Socket::INET6->new(Listen => 5, LocalAddr => 'localhost', LocalPort => 9000, Proto => 'tcp'); $sock = IO::Socket::INET6->new('[::1]:25'); $sock = IO::Socket::INET6->new(PeerPort => 9999, PeerAddr => Socket6::inet_ntop(AF_INET6,in6addr_broadcast), Proto => udp, LocalAddr => 'localhost', Broadcast => 1 ) or die "Can't bind : $@\n"; NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE As of VERSION 1.18 all IO::Socket objects have autoflush turned on by default. This was not the case with earlier releases. NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE =back =head2 METHODS =over 4 =item accept () See L<IO::Socket::INET>. =item bind () See L<IO::Socket::INET>. =item configure () This function exists in this module, but I (= Shlomi Fish) don't know what it does, or understand it. It's also not tested anywhere. I'll be happy to be enlightened. =item connect () See L<IO::Socket::INET>. =item sockaddr () Return the address part of the sockaddr structure for the socket =item sockdomain() Returns the domain of the socket - AF_INET or AF_INET6 or whatever. =item sockport () Return the port number that the socket is using on the local host =item sockhost () Return the address part of the sockaddr structure for the socket in a text form ("2001:800:40:2a05::10" or "245.245.13.27") =item sockflow () Return the flow information part of the sockaddr structure for the socket =item sockscope () Return the scope identification part of the sockaddr structure for the socket =item peeraddr () Return the address part of the sockaddr structure for the socket on the peer host =item peerport () Return the port number for the socket on the peer host. =item peerhost () Return the address part of the sockaddr structure for the socket on the peer host in a text form ("2001:800:40:2a05::10" or "245.245.13.27") =item peerflow () Return the flow information part of the sockaddr structure for the socket on the peer host =item peerscope () Return the scope identification part of the sockaddr structure for the socket on the peer host =back =head1 REPOSITORY The Subversion repository for this module carrying complete version history and other information is: L<http://svn.berlios.de/svnroot/repos/web-cpan/IO-Socket-INET6/> =head1 SEE ALSO L<Socket>,L<Socket6>, L<IO::Socket> =head1 AUTHOR This program is based on L<IO::Socket::INET> by Graham Barr <gbarr@pobox.com> and currently maintained by the Perl Porters. Modified by Rafael Martinez Torres <rafael.martinez@novagnet.com> and Euro6IX project. Modified further by Shlomi Fish <shlomif@iglu.org.il>, while disclaiming all copyrights. =head1 COPYRIGHT Copyright (c) 2003- Rafael Martinez Torres <rafael.martinez@novagnet.com>. Copyright (c) 2003- Euro6IX project. Copyright (c) 1996-8 Graham Barr <gbarr@pobox.com>. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. =cut
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