| 1 |
=head1 NET::IRC::Server |
| 2 |
|
| 3 |
NET::IRCServer - a module to handle the IRC Protocol and implements a lightweight IRC Server (without server-to-server support) |
| 4 |
|
| 5 |
=head1 SYNOPSIS |
| 6 |
|
| 7 |
use NET::IRC::Server; |
| 8 |
|
| 9 |
$server = NET::IRC::Server->new (srv_prefix => "mein.irc.server.funtzt.net"); |
| 10 |
|
| 11 |
$s->set_send_cb (sub { ... }); |
| 12 |
|
| 13 |
$s->parse_irc_stream (...) |
| 14 |
|
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=cut |
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|
| 17 |
package Net::IRC::Server; |
| 18 |
use Data::Dumper; |
| 19 |
use strict; |
| 20 |
use warnings; |
| 21 |
|
| 22 |
=head1 METHODS |
| 23 |
|
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=over 4 |
| 25 |
|
| 26 |
=cut |
| 27 |
|
| 28 |
=item new (srv_prefix => $server_prefix) |
| 29 |
|
| 30 |
srv_prefix - the prefix the server will use for irc commands from itself |
| 31 |
|
| 32 |
=cut |
| 33 |
sub new { |
| 34 |
my $class = shift; |
| 35 |
my $self = { @_ }; |
| 36 |
bless $self, $class; |
| 37 |
return $self; |
| 38 |
} |
| 39 |
|
| 40 |
=item set_send_cb ($sub, [$command]) |
| 41 |
|
| 42 |
The code-ref in the C<$sub> will be called everythime the server wants to send data to a client. |
| 43 |
|
| 44 |
If the C<$command> argument is given, the callback will only be called for irc-commands that match |
| 45 |
C<$command>. If the callback returns a true value when it's matched to a C<$command> the alternative callback |
| 46 |
(given without the C<$command>) won't be called. |
| 47 |
|
| 48 |
The callback will be called with following arguments: |
| 49 |
|
| 50 |
$sub->($client, $data, $prefix, $command, $trailing, @params) |
| 51 |
|
| 52 |
$client - the client datastructure you give C<parse_irc_stream ()> |
| 53 |
$data - the raw data to send out, for example on a socket |
| 54 |
$prefix - irc message prefix (may be undefined) |
| 55 |
$command - irc command |
| 56 |
$trailing - the trailing irc parameter |
| 57 |
@params - the other params or the irc message |
| 58 |
|
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=cut |
| 60 |
sub set_send_cb { |
| 61 |
my ($self, $cb, $cmd) = @_; |
| 62 |
|
| 63 |
if (defined $cmd) { |
| 64 |
$self->{send_cb_cmd}->{uc $cmd} = $cb; |
| 65 |
|
| 66 |
} else { |
| 67 |
$self->{send_cb} = $cb; |
| 68 |
} |
| 69 |
} |
| 70 |
|
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=item set_cmd_cb ($cmd, $cb) |
| 72 |
|
| 73 |
Sets the command callback for the irc-command C<$cmd>. |
| 74 |
The callback is executed B<before> the command is evaluated |
| 75 |
by the server. If you want to prevent evaluation by the server |
| 76 |
later, you have to return a true value. Otherwise the server |
| 77 |
will evaluate the command and sends responses. |
| 78 |
|
| 79 |
There is are following special events/commands you can register |
| 80 |
a callback for, set C<$cmd> to: |
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|
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'*' - to receive all commands |
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'!' - client successfully registered (after he send |
| 84 |
PASS, NICK and USER and all commands were successful, |
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NOTE: the returnvalue of this callback will be ignored) |
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|
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Arguments of the callback are like: |
| 88 |
|
| 89 |
$cb->($client, $ircmsg); |
| 90 |
|
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$client - the client datastructure for this command |
| 92 |
$ircmsg - the irc-message hash containing: |
| 93 |
{ |
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prefix => <irc-prefix>, |
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command => <irc-command>, |
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params => <irc-params including trailing>, |
| 97 |
trailing => <the trailing parameter, also included in params> |
| 98 |
} |
| 99 |
|
| 100 |
=cut |
| 101 |
sub set_cmd_cb { |
| 102 |
my ($self, $cmd, $cb) = @_; |
| 103 |
$self->{cmd_cbs}->{uc $cmd} = $cb; |
| 104 |
} |
| 105 |
|
| 106 |
sub set_post_cmd_cb { |
| 107 |
my ($self, $cmd, $cb) = @_; |
| 108 |
$self->{post_cmd_cbs}->{uc $cmd} = $cb; |
| 109 |
} |
| 110 |
|
| 111 |
=item send_srv_msg ($client, @msg) |
| 112 |
|
| 113 |
Sends a irc-message to C<$client> with the server-prefix. |
| 114 |
@msg should look like: (<command>, <trailing>, <param-1>, ..., <param-n>) |
| 115 |
|
| 116 |
=cut |
| 117 |
sub send_srv_msg { |
| 118 |
my ($self, $client, @msg) = @_; |
| 119 |
$self->send_msg ($client, $self->{srv_prefix}, @msg); |
| 120 |
} |
| 121 |
|
| 122 |
=item send_msg ($client, @msg) |
| 123 |
|
| 124 |
Sends a irc-message to C<$client>. |
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@msg should look like: (<prefix>, <command>, <trailing>, <param-1>, ..., <param-n>) |
| 126 |
|
| 127 |
=cut |
| 128 |
sub send_msg { |
| 129 |
my ($self, $client, @msg) = @_; |
| 130 |
my $r; |
| 131 |
|
| 132 |
$r = $self->{send_cb_cmd}->{uc $msg[1]}->($client, $self->mk_msg (@msg), @msg) |
| 133 |
if defined $self->{send_cb_cmd}->{uc $msg[1]}; |
| 134 |
|
| 135 |
$self->{send_cb}->($client, $self->mk_msg (@msg), @msg) |
| 136 |
if defined $self->{send_cb} and not $r; |
| 137 |
} |
| 138 |
|
| 139 |
|
| 140 |
=item send_nameslist ($client, $channel) |
| 141 |
|
| 142 |
This sends the names-list of C<$channel> to the C<$client>. |
| 143 |
|
| 144 |
=cut |
| 145 |
sub send_nameslist { |
| 146 |
my ($self, $client, $channel) = @_; |
| 147 |
|
| 148 |
# TODO: Modes for users! Look here too: |
| 149 |
my @names = map { $_->{nickname} } values %{$self->{channels}->{lc $channel}}; |
| 150 |
|
| 151 |
# TODO: Look for channel modes! |
| 152 |
|
| 153 |
my $i = 0; |
| 154 |
my @part; |
| 155 |
|
| 156 |
while (@names) { |
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$i++; |
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push @part, shift @names; |
| 159 |
|
| 160 |
if ($i % 10 == 0) { |
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$self->send_srv_msg ($client, "353", join (' ', @part), $client->{nickname}, "=", $channel); |
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@part = (); |
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} |
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} |
| 165 |
|
| 166 |
if (@part) { |
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$self->send_srv_msg ($client, "353", join (' ', @part), $client->{nickname}, "=", $channel); |
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} |
| 169 |
|
| 170 |
$self->send_srv_msg ($client, "366", "End of NAMES list", $client->{nickname}, $channel); |
| 171 |
} |
| 172 |
|
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sub mk_msg { |
| 174 |
my ($self, $prefix, $command, $trail, @params) = @_; |
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my $msg = ""; |
| 176 |
|
| 177 |
$msg .= defined $prefix ? ":$prefix " : ""; |
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$msg .= "$command"; |
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|
| 180 |
map { $msg .= " $_" } @params; |
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|
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$msg .= defined $trail ? " :$trail" : ""; |
| 183 |
$msg .= "\r\n"; |
| 184 |
|
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return $msg; |
| 186 |
} |
| 187 |
|
| 188 |
sub mk_clpref { |
| 189 |
my ($self, $client) = @_; |
| 190 |
return $client->{nickname}."!".$client->{username}.'@'.$client->{hostname}; |
| 191 |
} |
| 192 |
|
| 193 |
=item feed_irc_data ($client, $data) |
| 194 |
|
| 195 |
Feeds raw IRC C<$data> for processing. When enough data for a command was |
| 196 |
feeded the command is handled and the callbacks set with C<set_cmd_cb> and C<set_post_cmd_cb> |
| 197 |
will be called. When the server wants to send a response he calls the callback set with C<set_send_cb>. |
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|
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The C<$client> data structure has to contain the C<hostname>-key, so the server can generate the irc |
| 200 |
message prefix for that client in his replys. |
| 201 |
|
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In the callbacks the C<$client> data structure will be filled with followin keys: |
| 203 |
|
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$client = { |
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registered => <a flag (may be undef) whether the client finished the |
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registration process and has a valid nickname and username>, |
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nickname => <the nickname the client currently has>, |
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username => <the username the client send when he logged in>, |
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password => <the password the client send when logged in>, |
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hostname => <this is what you have to provide>, |
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channels => { <channel-name> => 1, <channel2-name> => 1, ..., <channeln-name> } |
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(a hash of channel names the client is currently joined ) |
| 213 |
}; |
| 214 |
|
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=cut |
| 216 |
sub feed_irc_data { |
| 217 |
my ($self, $client, $data) = @_; |
| 218 |
|
| 219 |
$self->{buffer} .= $data; |
| 220 |
|
| 221 |
while ($self->{buffer} =~ s/^([^\r\n]*)\r?\n//) { |
| 222 |
push @{$self->{msgs}}, $1; |
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} |
| 224 |
|
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map { $self->handle_irc_msg ($client, $self->parse_irc_msg ($_)) } @{$self->{msgs}}; |
| 226 |
|
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$self->{msgs} = []; |
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} |
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|
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sub handle_irc_msg { |
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my ($self, $cl, $msg) = @_; |
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|
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return if not defined $msg; |
| 234 |
|
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my $c = uc $msg->{command}; |
| 236 |
|
| 237 |
my $r; |
| 238 |
$r ||= $self->{cmd_cbs}->{$c}->($cl, $msg) |
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if defined $self->{cmd_cbs}->{$c}; |
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$r ||= $self->{cmd_cbs}->{"*"}->($cl, $msg) |
| 241 |
if defined $self->{cmd_cbs}->{"*"}; |
| 242 |
|
| 243 |
if ($r) { |
| 244 |
warn "notihgn to do skip srv code\n"; |
| 245 |
return |
| 246 |
} |
| 247 |
|
| 248 |
if ($c eq "USER") { |
| 249 |
$cl->{username} = $msg->{params}->[0]; |
| 250 |
$cl->{realname} = $msg->{params}->[3]; |
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|
| 252 |
} elsif ($c eq "NICK") { |
| 253 |
my $n = $msg->{params}->[0]; |
| 254 |
$self->change_nick ($n, $cl); |
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} |
| 256 |
|
| 257 |
if (defined $cl->{username} |
| 258 |
and defined $cl->{nickname} |
| 259 |
and not $cl->{registered}) |
| 260 |
{ |
| 261 |
$self->send_msg ($cl, $self->{srv_prefix}, "001", |
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"Welcome to NET::IRCServer! " |
| 263 |
. $self->mk_clpref ($cl), $cl->{nickname}); |
| 264 |
$cl->{registered} = 1; |
| 265 |
|
| 266 |
$self->{cmd_cbs}->{"!"}->($cl, $msg) |
| 267 |
if defined $self->{cmd_cbs}->{"!"}; |
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} |
| 269 |
|
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if ($c eq "PASS") { |
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$cl->{password} = $msg->{params}->[0]; |
| 272 |
|
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} elsif ($c eq "JOIN") { |
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my @chnls = split /,/, $msg->{params}->[0]; |
| 275 |
my @keys; |
| 276 |
@keys = split /,/, $msg->{params}->[1] if defined $msg->{params}->[1]; |
| 277 |
|
| 278 |
$self->join_channel ($cl, $_, pop @keys) for @chnls; |
| 279 |
|
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} elsif ($c eq "PART") { |
| 281 |
my @chnls = split /,/, $msg->{params}->[0]; |
| 282 |
$self->part_channel ($cl, $_, $msg->{params}->[1]) for @chnls; |
| 283 |
|
| 284 |
} elsif ($c eq "NOTICE" or $c eq "PRIVMSG") { |
| 285 |
$self->generic_msg ($cl, $msg->{params}->[0], $c, $msg->{params}->[1]); |
| 286 |
|
| 287 |
} elsif ($c eq "QUIT") { |
| 288 |
$self->quit ($cl, $msg->{params}->[0]); |
| 289 |
|
| 290 |
} elsif ($c eq "NAMES") { |
| 291 |
|
| 292 |
if (defined $msg->{params}->[1]) { |
| 293 |
$self->send_srv_msg ($cl,"402", "No such server", $msg->{params}->[1]); |
| 294 |
|
| 295 |
} elsif (defined $msg->{params}->[0]) { |
| 296 |
my @chans = split /,/, $msg->{params}->[0]; |
| 297 |
$self->send_nameslist ($cl, $_) for @chans; |
| 298 |
|
| 299 |
} else { |
| 300 |
$self->send_nameslist ($cl, $_) for keys %{$self->{channels}}; |
| 301 |
} |
| 302 |
|
| 303 |
} elsif ($c eq "PING") { |
| 304 |
|
| 305 |
if (defined $msg->{params}->[1]) { |
| 306 |
$self->send_srv_msg ($cl,"402", "No such server", $msg->{params}->[1]); |
| 307 |
} else { |
| 308 |
$self->send_srv_msg ($cl, "PONG", $msg->{params}->[0]); |
| 309 |
} |
| 310 |
|
| 311 |
} else { |
| 312 |
$self->send_srv_msg ($cl, "421", "Unknown command", $c) |
| 313 |
if $c ne "USER" and $c ne "NICK"; # handled above |
| 314 |
} |
| 315 |
|
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$self->{post_cmd_cbs}->{$c}->($cl, $msg) if defined $self->{post_cmd_cbs}->{$c}; |
| 317 |
$self->{post_cmd_cbs}->{"*"}->($cl, $msg) if defined $self->{post_cmd_cbs}->{"*"}; |
| 318 |
} |
| 319 |
|
| 320 |
=item quit ($client, $quitmsg) |
| 321 |
|
| 322 |
It will remove the C<$client> from all lists in the server, and broadcasts the |
| 323 |
C<$quitmsg> to all users on the channels the C<$client> was. |
| 324 |
|
| 325 |
=cut |
| 326 |
sub quit { |
| 327 |
my ($self, $client, $quitmsg) = @_; |
| 328 |
|
| 329 |
$self->channel_brdcst ( |
| 330 |
$self->mk_clpref ($client), |
| 331 |
$_, |
| 332 |
"QUIT", |
| 333 |
$quitmsg) for keys %{$client->{channels}}; |
| 334 |
|
| 335 |
$self->remove_channel ($client, $_) for keys %{$client->{channels}}; |
| 336 |
} |
| 337 |
|
| 338 |
=item part_channel ($client, $channel, $reason) |
| 339 |
|
| 340 |
It will remove the C<$client> from the C<$channel> and will broadcast a PART to all members of that channel. |
| 341 |
The part C<$reason> may be undefined. |
| 342 |
|
| 343 |
=cut |
| 344 |
sub part_channel { |
| 345 |
my ($self, $client, $chan, $reas) = @_; |
| 346 |
|
| 347 |
$self->channel_brdcst ($self->mk_clpref ($client), $chan, "PART", $reas, $chan); |
| 348 |
$self->remove_channel ($client, $chan); |
| 349 |
} |
| 350 |
|
| 351 |
=item join_channel ($client, $channel, $key) |
| 352 |
|
| 353 |
It will add the C<$client> to the C<$channel> and will broadcast a JOIN to all members of that channel. |
| 354 |
|
| 355 |
=cut |
| 356 |
sub join_channel { |
| 357 |
my ($self, $client, $chan, $key) = @_; |
| 358 |
|
| 359 |
if ($chan eq "0") { |
| 360 |
# part all channels of $client |
| 361 |
$self->part_channel ($client, $_) for keys %{$client->{channels}}; |
| 362 |
$self->remove_channel ($client, $_) for keys %{$client->{channels}}; |
| 363 |
|
| 364 |
} else { |
| 365 |
$self->add_channel ($client, $chan); |
| 366 |
$self->channel_brdcst ($self->mk_clpref ($client), $chan, "JOIN", $chan); |
| 367 |
$self->send_nameslist ($client, $chan); |
| 368 |
} |
| 369 |
} |
| 370 |
|
| 371 |
=item get_user_list ($channel) |
| 372 |
|
| 373 |
Get's the userlist of the $channel in the form: |
| 374 |
{ nickname => client-structure, ... } |
| 375 |
|
| 376 |
=cut |
| 377 |
sub get_user_list { |
| 378 |
my ($self, $channel) = @_; |
| 379 |
return $self->{channels}->{lc $channel}; |
| 380 |
} |
| 381 |
|
| 382 |
=item register_nick ($client, $nick) |
| 383 |
|
| 384 |
Registers the nickname C<$nick> in the server and sets it's |
| 385 |
client data structure to C<$client>. |
| 386 |
|
| 387 |
=cut |
| 388 |
sub register_nick { |
| 389 |
my ($self, $client, $nick) = @_; |
| 390 |
$self->{reg_nicks}->{lc $nick} = $client; |
| 391 |
} |
| 392 |
|
| 393 |
=item get_nick ($nick) |
| 394 |
|
| 395 |
Returns the client datastructure for nickname C<$nick> or |
| 396 |
undef if there is no such nick; |
| 397 |
|
| 398 |
=cut |
| 399 |
sub get_nick { |
| 400 |
my ($self, $nick) = @_; |
| 401 |
$self->{reg_nicks}->{lc $nick}; |
| 402 |
} |
| 403 |
|
| 404 |
=item unregister_nick ($nick) |
| 405 |
|
| 406 |
Unregisters the nickname C<$nick> in the server. |
| 407 |
|
| 408 |
=cut |
| 409 |
sub unregister_nick { |
| 410 |
my ($self, $client, $nick) = @_; |
| 411 |
delete $self->{reg_nicks}->{lc $client->{nickname}}; |
| 412 |
} |
| 413 |
|
| 414 |
sub add_channel { |
| 415 |
my ($self, $client, $channel) = @_; |
| 416 |
$self->{channels}->{lc $channel}->{lc $client->{nickname}} = $client; |
| 417 |
$client->{channels}->{lc $channel} = 1; |
| 418 |
} |
| 419 |
|
| 420 |
sub remove_channel { |
| 421 |
my ($self, $client, $channel) = @_; |
| 422 |
delete $self->{channels}->{lc $channel}->{lc $client->{nickname}}; |
| 423 |
delete $client->{channels}->{lc $channel}; |
| 424 |
} |
| 425 |
|
| 426 |
=item channel_exists ($channel) |
| 427 |
|
| 428 |
Return true if there are clients who are joined to that channel. |
| 429 |
|
| 430 |
=cut |
| 431 |
sub channel_exists { |
| 432 |
my ($self, $channel) = @_; |
| 433 |
|
| 434 |
return undef |
| 435 |
if not defined $self->{channels}->{lc $channel}; |
| 436 |
return |
| 437 |
(scalar (keys %{$self->{channels}->{lc $channel}}) != 0); |
| 438 |
} |
| 439 |
|
| 440 |
sub channel_brdcst { |
| 441 |
my ($self, $prefix, $channel, $command, @rmsg) = @_; |
| 442 |
$self->channel_brdcst_exclude (undef, $prefix, $channel, $command, @rmsg); |
| 443 |
} |
| 444 |
|
| 445 |
sub channel_brdcst_exclude { |
| 446 |
my ($self, $excl_cl, $prefix, $channel, $command, @rmsg) = @_; |
| 447 |
|
| 448 |
for (values %{$self->{channels}->{lc $channel}}) { |
| 449 |
|
| 450 |
if (not (defined $excl_cl) or $excl_cl != $_) { |
| 451 |
|
| 452 |
$self->send_msg ($_, $prefix, uc $command, @rmsg); |
| 453 |
} |
| 454 |
} |
| 455 |
} |
| 456 |
|
| 457 |
|
| 458 |
sub generic_msg { |
| 459 |
my ($self, $client, $target, $msgcmd, $msg) = @_; |
| 460 |
|
| 461 |
my $pref = $self->mk_clpref ($client); |
| 462 |
|
| 463 |
if (exists $self->{channels}->{lc $target}) { |
| 464 |
$self->channel_brdcst_exclude ($client, $pref, $target, uc ($msgcmd), $msg, $target); |
| 465 |
} else { |
| 466 |
$self->send_msg ($self->get_nick ($target), $pref, uc ($msgcmd), $msg, $target); |
| 467 |
} |
| 468 |
} |
| 469 |
|
| 470 |
|
| 471 |
sub change_nick { |
| 472 |
my ($self, $nick, $client) = @_; |
| 473 |
|
| 474 |
# check wether the nick to change to is already in use |
| 475 |
if ($self->get_nick ($nick)) { |
| 476 |
$self->send_msg ($client, $self->{srv_prefix}, 433, "Nickname is already in use", $nick); |
| 477 |
return; |
| 478 |
} |
| 479 |
|
| 480 |
my %ppltotell; # hash-list of people to send a nick-update |
| 481 |
|
| 482 |
if (defined $client->{nickname}) { |
| 483 |
|
| 484 |
# update channels the client is on |
| 485 |
for my $c (keys %{$client->{channels}}) { |
| 486 |
|
| 487 |
# search the people to tell this nick changed |
| 488 |
for (values %{$self->{channels}->{lc $c}}) { |
| 489 |
$ppltotell{$_->{nickname}} = $_; |
| 490 |
} |
| 491 |
|
| 492 |
# change the nickname in the channel lists |
| 493 |
delete $self->{channels}->{lc $c}->{$client->{nickname}}; |
| 494 |
$self->{channels}->{lc $c}->{lc $nick} = $client; |
| 495 |
} |
| 496 |
} |
| 497 |
|
| 498 |
if ($client->{registered}) { # only tell if this client is registered |
| 499 |
|
| 500 |
# send us and others that the nick changed |
| 501 |
$ppltotell{$client->{nickname}} = $client; |
| 502 |
my $oldprfx = $self->mk_clpref ($client); |
| 503 |
$self->send_msg ($_, $oldprfx, "NICK", undef, $nick) for values %ppltotell; |
| 504 |
} |
| 505 |
|
| 506 |
# now update the client data |
| 507 |
$self->unregister_nick ($client->{nickname}); |
| 508 |
|
| 509 |
$client->{nickname} = $nick; |
| 510 |
$self->register_nick ($client, $client->{nickname}); |
| 511 |
|
| 512 |
return 1; |
| 513 |
} |
| 514 |
|
| 515 |
sub parse_irc_msg { |
| 516 |
my ($self, $msg) = @_; |
| 517 |
|
| 518 |
my $cmd; |
| 519 |
my $pref; |
| 520 |
my $t; |
| 521 |
my @a; |
| 522 |
|
| 523 |
my $p = $msg =~ s/^(:([^ ]+)[ ])?([A-Za-z]+|\d{3})//; |
| 524 |
$pref = $2; |
| 525 |
$cmd = $3; |
| 526 |
|
| 527 |
my $i = 0; |
| 528 |
|
| 529 |
while ($msg =~ s/^[ ]([^ :\r\n\0][^ \r\n\0]*)//) { |
| 530 |
|
| 531 |
push @a, $1 if defined $1; |
| 532 |
if (++$i > 13) { last; } |
| 533 |
} |
| 534 |
|
| 535 |
if ($i == 14) { |
| 536 |
|
| 537 |
if ($msg =~ s/^[ ]:?([^\r\n\0]*)//) { |
| 538 |
$t = $1 if $1 ne ""; |
| 539 |
} |
| 540 |
|
| 541 |
} else { |
| 542 |
|
| 543 |
if ($msg =~ s/^[ ]:([^\r\n\0]*)//) { |
| 544 |
$t = $1 if $1 ne ""; |
| 545 |
} |
| 546 |
} |
| 547 |
|
| 548 |
push @a, $t if defined $t; |
| 549 |
|
| 550 |
my $m = { prefix => $pref, command => $cmd, params => \@a, trailing => $t }; |
| 551 |
return $p ? $m : undef; |
| 552 |
} |
| 553 |
|
| 554 |
=back |
| 555 |
|
| 556 |
=cut |
| 557 |
|
| 558 |
1; |
