| 1 |
=head1 NAME |
| 2 |
|
| 3 |
Coro::Socket - non-blocking socket-io |
| 4 |
|
| 5 |
=head1 SYNOPSIS |
| 6 |
|
| 7 |
use Coro::Socket; |
| 8 |
|
| 9 |
=head1 DESCRIPTION |
| 10 |
|
| 11 |
This module implements socket-handles in a coroutine-compatible way, |
| 12 |
that is, other coroutines can run while reads or writes block on the |
| 13 |
handle. L<Coro::Handle>. |
| 14 |
|
| 15 |
=over 4 |
| 16 |
|
| 17 |
=cut |
| 18 |
|
| 19 |
package Coro::Socket; |
| 20 |
|
| 21 |
no warnings; |
| 22 |
|
| 23 |
use Errno (); |
| 24 |
use Carp qw(croak); |
| 25 |
use Socket; |
| 26 |
|
| 27 |
use Coro::Util (); |
| 28 |
|
| 29 |
use base 'Coro::Handle'; |
| 30 |
|
| 31 |
$VERSION = 0.45; |
| 32 |
|
| 33 |
sub _proto($) { |
| 34 |
$_proto{$_[0]} ||= do { |
| 35 |
((getprotobyname $_[0])[2] || (getprotobynumber $_[0])[2]) |
| 36 |
or croak "unsupported protocol: $_[0]"; |
| 37 |
}; |
| 38 |
} |
| 39 |
|
| 40 |
sub _port($$) { |
| 41 |
$_port{$_[0],$_[1]} ||= do { |
| 42 |
return $_[0] if $_[0] =~ /^\d+$/; |
| 43 |
|
| 44 |
$_[0] =~ /([^(]+)\s*(?:\((\d+)\))?/x |
| 45 |
or croak "unparsable port number: $_[0]"; |
| 46 |
((getservbyname $1, $_[1])[2] |
| 47 |
|| (getservbyport $1, $_[1])[2] |
| 48 |
|| $2) |
| 49 |
or croak "unknown port: $_[0]"; |
| 50 |
}; |
| 51 |
} |
| 52 |
|
| 53 |
sub _sa($$$) { |
| 54 |
my ($host, $port, $proto) = @_; |
| 55 |
my $_proto = _proto($proto); |
| 56 |
my $_port = _port($port, $proto); |
| 57 |
|
| 58 |
# optimize this a bit for a common case |
| 59 |
if ($host =~ /^(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?) |
| 60 |
\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?) |
| 61 |
\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?) |
| 62 |
\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?)$/) { |
| 63 |
return pack_sockaddr_in($_port, inet_aton $host); |
| 64 |
} else { |
| 65 |
my (undef, undef, undef, undef, @host) = Coro::Util::gethostbyname $host |
| 66 |
or croak "unknown host: $host"; |
| 67 |
map pack_sockaddr_in($_port,$_), @host; |
| 68 |
} |
| 69 |
} |
| 70 |
|
| 71 |
=item $fh = new Coro::Socket param => value, ... |
| 72 |
|
| 73 |
Create a new non-blocking tcp handle and connect to the given host |
| 74 |
and port. The parameter names and values are mostly the same as in |
| 75 |
IO::Socket::INET (as ugly as I think they are). |
| 76 |
|
| 77 |
If the host is unreachable or otherwise cannot be connected to this method |
| 78 |
returns undef. On all other errors ot croak's. |
| 79 |
|
| 80 |
Multihomed is always enabled. |
| 81 |
|
| 82 |
$fh = new_inet Coro::Socket PeerHost => "localhost", PeerPort => 'finger'; |
| 83 |
|
| 84 |
=cut |
| 85 |
|
| 86 |
sub _prepare_socket { |
| 87 |
my ($class, $arg) = @_; |
| 88 |
my $fh; |
| 89 |
|
| 90 |
socket $fh, PF_INET, $arg->{Type}, _proto($arg->{Proto}) |
| 91 |
or return; |
| 92 |
|
| 93 |
$fh = bless Coro::Handle->new_from_fh($fh, timeout => $arg{Timeout}), $class |
| 94 |
or return; |
| 95 |
|
| 96 |
if ($arg->{ReuseAddr}) { |
| 97 |
$fh->setsockopt(SOL_SOCKET, SO_REUSEADDR, 1) |
| 98 |
or croak "setsockopt(SO_REUSEADDR): $!"; |
| 99 |
} |
| 100 |
|
| 101 |
if ($arg->{ReusePort}) { |
| 102 |
$fh->setsockopt(SOL_SOCKET, SO_REUSEPORT, 1) |
| 103 |
or croak "setsockopt(SO_REUSEPORT): $!"; |
| 104 |
} |
| 105 |
|
| 106 |
if ($arg->{LocalPort}) { |
| 107 |
my @sa = _sa($arg->{LocalHost} || "0.0.0.0", $arg->{LocalPort}, $arg->{Proto}); |
| 108 |
$fh->bind($sa[0]) |
| 109 |
or croak "bind($arg->{LocalHost}:$arg->{LocalPort}): $!"; |
| 110 |
} |
| 111 |
|
| 112 |
$fh; |
| 113 |
} |
| 114 |
|
| 115 |
sub new { |
| 116 |
my $class = shift; |
| 117 |
my %arg = @_; |
| 118 |
my $fh; |
| 119 |
|
| 120 |
$arg{Proto} ||= 'tcp'; |
| 121 |
$arg{LocalHost} ||= delete $arg{LocalAddr}; |
| 122 |
$arg{PeerHost} ||= delete $arg{PeerAddr}; |
| 123 |
defined ($arg{Type}) or $arg{Type} = $arg{Proto} eq "tcp" ? SOCK_STREAM : SOCK_DGRAM; |
| 124 |
|
| 125 |
if ($arg{PeerHost}) { |
| 126 |
my @sa = _sa($arg{PeerHost}, $arg{PeerPort}, $arg{Proto}); |
| 127 |
|
| 128 |
for (@sa) { |
| 129 |
$fh = $class->_prepare_socket(\%arg) |
| 130 |
or return; |
| 131 |
|
| 132 |
$! = 0; |
| 133 |
|
| 134 |
if ($fh->connect($_)) { |
| 135 |
next unless writable $fh; |
| 136 |
$! = unpack "i", $fh->getsockopt(SOL_SOCKET, SO_ERROR); |
| 137 |
} |
| 138 |
|
| 139 |
$! or last; |
| 140 |
|
| 141 |
$!{ECONNREFUSED} or $!{ENETUNREACH} or $!{ETIMEDOUT} or $!{EHOSTUNREACH} |
| 142 |
or return; |
| 143 |
} |
| 144 |
} else { |
| 145 |
$fh = $class->_prepare_socket(\%arg) |
| 146 |
or return; |
| 147 |
if (exists $arg{Listen}) { |
| 148 |
$fh->listen($arg{Listen}) |
| 149 |
or return; |
| 150 |
} |
| 151 |
} |
| 152 |
|
| 153 |
$fh; |
| 154 |
} |
| 155 |
|
| 156 |
=item connect, listen, bind, getsockopt, setsockopt, |
| 157 |
send, recv, peername, sockname |
| 158 |
|
| 159 |
Do the same thing as the perl builtins or IO::Socket methods (but return |
| 160 |
true on EINPROGRESS). Remember that these must be method calls. |
| 161 |
|
| 162 |
=cut |
| 163 |
|
| 164 |
sub connect { connect tied(${$_[0]})->[0], $_[1] or $! == Errno::EINPROGRESS } |
| 165 |
sub bind { bind tied(${$_[0]})->[0], $_[1] } |
| 166 |
sub listen { listen tied(${$_[0]})->[0], $_[1] } |
| 167 |
sub getsockopt { getsockopt tied(${$_[0]})->[0], $_[1], $_[2] } |
| 168 |
sub setsockopt { setsockopt tied(${$_[0]})->[0], $_[1], $_[2], $_[3] } |
| 169 |
sub send { send tied(${$_[0]})->[0], $_[1], $_[2], @_ > 2 ? $_[3] : () } |
| 170 |
sub recv { recv tied(${$_[0]})->[0], $_[1], $_[2], @_ > 2 ? $_[3] : () } |
| 171 |
sub sockname { getsockname tied(${$_[0]})->[0] } |
| 172 |
sub peername { getpeername tied(${$_[0]})->[0] } |
| 173 |
|
| 174 |
=item ($peername, $fh) = $listen_fh->accept |
| 175 |
|
| 176 |
In scalar context, returns the newly accepted socket (or undef) and in |
| 177 |
list context return the ($fh, $peername) pair (or nothing). |
| 178 |
|
| 179 |
=cut |
| 180 |
|
| 181 |
sub accept { |
| 182 |
my ($peername, $fh); |
| 183 |
while () { |
| 184 |
$peername = accept $fh, tied(${$_[0]})->[0] |
| 185 |
and return wantarray |
| 186 |
? ((new_from_fh Coro::Socket $fh), $peername) |
| 187 |
: (new_from_fh Coro::Socket $fh); |
| 188 |
|
| 189 |
return unless $!{EAGAIN}; |
| 190 |
|
| 191 |
$_[0]->readable or return; |
| 192 |
} |
| 193 |
} |
| 194 |
|
| 195 |
1; |
| 196 |
|
| 197 |
=head1 AUTHOR |
| 198 |
|
| 199 |
Marc Lehmann <pcg@goof.com> |
| 200 |
http://www.goof.com/pcg/marc/ |
| 201 |
|
| 202 |
=cut |
| 203 |
|
