| 1 |
=head1 NAME |
| 2 |
|
| 3 |
Coro::Socket - non-blocking socket-io |
| 4 |
|
| 5 |
=head1 SYNOPSIS |
| 6 |
|
| 7 |
use Coro::Socket; |
| 8 |
|
| 9 |
# listen on an ipv4 socket |
| 10 |
my $socket = new Coro::Socket PeerHost => "localhost", |
| 11 |
PeerPort => 'finger'; |
| 12 |
|
| 13 |
# listen on any other type of socket |
| 14 |
my $socket = Coro::Socket->new_from_fh |
| 15 |
(IO::Socket::UNIX->new |
| 16 |
Local => "/tmp/socket", |
| 17 |
Type => SOCK_STREAM, |
| 18 |
); |
| 19 |
|
| 20 |
=head1 DESCRIPTION |
| 21 |
|
| 22 |
This module implements socket-handles in a coroutine-compatible way, |
| 23 |
that is, other coroutines can run while reads or writes block on the |
| 24 |
handle. See L<Coro::Handle>, especially the note about prefering method |
| 25 |
calls. |
| 26 |
|
| 27 |
=over 4 |
| 28 |
|
| 29 |
=cut |
| 30 |
|
| 31 |
package Coro::Socket; |
| 32 |
|
| 33 |
no warnings "uninitialized"; |
| 34 |
|
| 35 |
use strict; |
| 36 |
|
| 37 |
use Errno (); |
| 38 |
use Carp qw(croak); |
| 39 |
use Socket; |
| 40 |
use IO::Socket::INET (); |
| 41 |
|
| 42 |
use Coro::Util (); |
| 43 |
|
| 44 |
use base qw(Coro::Handle IO::Socket::INET); |
| 45 |
|
| 46 |
our $VERSION = 1.9; |
| 47 |
|
| 48 |
our (%_proto, %_port); |
| 49 |
|
| 50 |
sub _proto($) { |
| 51 |
$_proto{$_[0]} ||= do { |
| 52 |
((getprotobyname $_[0])[2] || (getprotobynumber $_[0])[2]) |
| 53 |
or croak "unsupported protocol: $_[0]"; |
| 54 |
}; |
| 55 |
} |
| 56 |
|
| 57 |
sub _port($$) { |
| 58 |
$_port{$_[0],$_[1]} ||= do { |
| 59 |
return $_[0] if $_[0] =~ /^\d+$/; |
| 60 |
|
| 61 |
$_[0] =~ /([^(]+)\s*(?:\((\d+)\))?/x |
| 62 |
or croak "unparsable port number: $_[0]"; |
| 63 |
((getservbyname $1, $_[1])[2] |
| 64 |
|| (getservbyport $1, $_[1])[2] |
| 65 |
|| $2) |
| 66 |
or croak "unknown port: $_[0]"; |
| 67 |
}; |
| 68 |
} |
| 69 |
|
| 70 |
sub _sa($$$) { |
| 71 |
my ($host, $port, $proto) = @_; |
| 72 |
$port or $host =~ s/:([^:]+)$// and $port = $1; |
| 73 |
my $_proto = _proto($proto); |
| 74 |
my $_port = _port($port, $proto); |
| 75 |
|
| 76 |
# optimize this a bit for a common case |
| 77 |
if (Coro::Util::dotted_quad $host) { |
| 78 |
return pack_sockaddr_in ($_port, inet_aton $host); |
| 79 |
} else { |
| 80 |
my (undef, undef, undef, undef, @host) = Coro::Util::gethostbyname $host |
| 81 |
or croak "unknown host: $host"; |
| 82 |
map pack_sockaddr_in ($_port,$_), @host; |
| 83 |
} |
| 84 |
} |
| 85 |
|
| 86 |
=item $fh = new Coro::Socket param => value, ... |
| 87 |
|
| 88 |
Create a new non-blocking tcp handle and connect to the given host |
| 89 |
and port. The parameter names and values are mostly the same as in |
| 90 |
IO::Socket::INET (as ugly as I think they are). |
| 91 |
|
| 92 |
If the host is unreachable or otherwise cannot be connected to this method |
| 93 |
returns undef. On all other errors ot croak's. |
| 94 |
|
| 95 |
Multihomed is always enabled. |
| 96 |
|
| 97 |
$fh = new Coro::Socket PeerHost => "localhost", PeerPort => 'finger'; |
| 98 |
|
| 99 |
=cut |
| 100 |
|
| 101 |
sub _prepare_socket { |
| 102 |
my ($self, $arg) = @_; |
| 103 |
|
| 104 |
$self |
| 105 |
} |
| 106 |
|
| 107 |
sub new { |
| 108 |
my ($class, %arg) = @_; |
| 109 |
|
| 110 |
$arg{Proto} ||= 'tcp'; |
| 111 |
$arg{LocalHost} ||= delete $arg{LocalAddr}; |
| 112 |
$arg{PeerHost} ||= delete $arg{PeerAddr}; |
| 113 |
defined ($arg{Type}) or $arg{Type} = $arg{Proto} eq "tcp" ? SOCK_STREAM : SOCK_DGRAM; |
| 114 |
|
| 115 |
socket my $fh, PF_INET, $arg{Type}, _proto ($arg{Proto}) |
| 116 |
or return; |
| 117 |
|
| 118 |
my $self = bless Coro::Handle->new_from_fh ( |
| 119 |
$fh, |
| 120 |
timeout => $arg{Timeout}, |
| 121 |
forward_class => $arg{forward_class}, |
| 122 |
partial => $arg{partial}, |
| 123 |
), $class |
| 124 |
or return; |
| 125 |
|
| 126 |
$self->configure (\%arg) |
| 127 |
} |
| 128 |
|
| 129 |
sub configure { |
| 130 |
my ($self, $arg) = @_; |
| 131 |
|
| 132 |
if ($arg->{ReuseAddr}) { |
| 133 |
$self->setsockopt (SOL_SOCKET, SO_REUSEADDR, 1) |
| 134 |
or croak "setsockopt(SO_REUSEADDR): $!"; |
| 135 |
} |
| 136 |
|
| 137 |
if ($arg->{ReusePort}) { |
| 138 |
$self->setsockopt (SOL_SOCKET, SO_REUSEPORT, 1) |
| 139 |
or croak "setsockopt(SO_REUSEPORT): $!"; |
| 140 |
} |
| 141 |
|
| 142 |
if ($arg->{LocalPort} || $arg->{LocalHost}) { |
| 143 |
my @sa = _sa($arg->{LocalHost} || "0.0.0.0", $arg->{LocalPort} || 0, $arg->{Proto}); |
| 144 |
$self->bind ($sa[0]) |
| 145 |
or croak "bind($arg->{LocalHost}:$arg->{LocalPort}): $!"; |
| 146 |
} |
| 147 |
|
| 148 |
if ($arg->{PeerHost}) { |
| 149 |
my @sa = _sa ($arg->{PeerHost}, $arg->{PeerPort}, $arg->{Proto}); |
| 150 |
|
| 151 |
for (@sa) { |
| 152 |
$! = 0; |
| 153 |
|
| 154 |
if ($self->connect ($_)) { |
| 155 |
next unless writable $self; |
| 156 |
$! = unpack "i", $self->getsockopt (SOL_SOCKET, SO_ERROR); |
| 157 |
} |
| 158 |
|
| 159 |
$! or last; |
| 160 |
|
| 161 |
$!{ECONNREFUSED} or $!{ENETUNREACH} or $!{ETIMEDOUT} or $!{EHOSTUNREACH} |
| 162 |
or return; |
| 163 |
} |
| 164 |
} elsif (exists $arg->{Listen}) { |
| 165 |
$self->listen ($arg->{Listen}) |
| 166 |
or return; |
| 167 |
} |
| 168 |
|
| 169 |
$self |
| 170 |
} |
| 171 |
|
| 172 |
1; |
| 173 |
|
| 174 |
=back |
| 175 |
|
| 176 |
=head1 AUTHOR |
| 177 |
|
| 178 |
Marc Lehmann <schmorp@schmorp.de> |
| 179 |
http://home.schmorp.de/ |
| 180 |
|
| 181 |
=cut |
| 182 |
|
