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Server.pm
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Server.pm
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#!/usr/bin/perl
#
# Server.pm
# Created: Tue Sep 15 13:55:23 1998 by [email protected]
# Revised: Wed Nov 22 11:03:05 2000 by [email protected]
# Copyright 1998 Jay F. Kominek ([email protected])
#
# Consult the file 'LICENSE' for the complete terms under which you
# may use this file.
#
#####################################################################
# Server object for The Perl Internet Relay Chat Daemon
#####################################################################
package Server;
use Utils;
use User;
use Channel;
use strict;
use Tie::IRCUniqueHash;
my $commands = {'PING' => \&handle_ping,
'PONG' => \&handle_pong,
# Channel membership
'JOIN' => \&handle_join,
'PART' => \&handle_part,
'INVITE' => \&handle_invite,
'KICK' => \&handle_kick,
# Channel status
'TOPIC' => \&handle_topic,
'MODE' => \&handle_mode,
# User presence
'NICK' => \&handle_nick,
'KILL' => \&handle_kill,
'QUIT' => \&handle_quit,
# User status
'AWAY' => \&handle_away,
# Server presence
'SERVER' => \&handle_server,
'SQUIT' => \&handle_squit,
# Communication
'PRIVMSG'=> \&handle_privmsg,
'NOTICE' => \&handle_notice,
# Burst commands
'BU' => \&handle_burstuser,
'BC' => \&handle_burstchannel
};
###################
# CLASS CONSTRUCTOR
###################
# Pass it its name.
sub new {
my $proto = shift;
my $class = ref($proto) || $proto;
my $this = { };
my $connection = shift;
$this->{'name'} = $connection->{'servername'};
$this->{'description'} = $connection->{'description'};
$this->{'distance'} = $connection->{'distance'};
$this->{'proto'} = $connection->{'proto'};
$this->{'server'} = $connection->{'server'};
$this->{'version'} = $Utils::VERSION;
$this->{'last_active'} = time();
tie my %usertmp, 'Tie::IRCUniqueHash';
$this->{'users'} = \%usertmp;
tie my %childtmp, 'Tie::IRCUniqueHash';
$this->{'children'} = \%childtmp;
bless($this, $class);
if(defined($connection->{'socket'})) {
$this->{'socket'} = $connection->{'socket'};
$this->{'outbuffer'} = $connection->{'outbuffer'};
$this->setupaslocal($connection->{'initiated'});
}
$this->{'server'}->addchildserver($this);
return $this;
}
sub setupaslocal {
my $this = shift;
my $initiated = shift;
my $server = $this->server;
# lookup and send password
if(!$initiated) {
$this->senddata("PASS :password\r\n");
###################################################################
# Start dumping the state of the entire network at the new server #
# Dump the server tree
# This server has to be sent in the special fashion. All other
# servers are spewed using the recursive method 'spewchildren'
$this->senddata(join(' ', # delimiter
"SERVER",
$server->name,
1,
0, # timestamp a
time, # timestamp b
"Px1",
":".$server->description)."\r\n");
}
foreach my $childserver ($server->children()) {
$this->spewchildren($childserver);
}
# Dump the users
# For big networks, it would be a very good idea to generate all the
# data that needs to be sent at one time, use Compress::Zlib on that
# data and then spew it binaryily.
# As it is, we will merely use the special burst user command
foreach my $user (values(%{Utils::users()})) {
$this->senddata(join(' ',
":".$user->server->name,
"BU", # Burst User. Only place of generation.
$user->nick,
$user->username,
$user->host,
$user->genmodestr,
":".$user->ircname)."\r\n");
}
# Burst channel information
foreach my $channel (values(%{Utils::channels()})) {
# :server.name BC #channel creationtime modestr modeargs
# nick @opnick +@opvoicenick +voicenick nick +voicenick2 @opnick2
$this->senddata(join(' ',
":".$this->parent->name,
"BC", # Burst Channel. Only place of generation.
$channel->name,
$channel->creation,
scalar($channel->users()),
map { ($channel->hasvoice($_)?"+":"").($channel->isop($_)?"@":"").$_->nick } $channel->users(),
)."\r\n"
);
}
}
sub spewchildren {
my $this = shift;
my $server = shift;
$this->senddata(join(' ',
":".$this->server->name,
"SERVER",
$server->name,
$server->hops+1,
0, # timestamp a
time, # timestamp b
"Px1",
":".$server->description)."\r\n");
foreach($server->children()) {
$this->spewchildren($_);
}
}
#####################################################################
# PROTOCOL HANDLERS
###################
##############
# Main Handler
sub handle {
my $this = shift;
my $rawline = shift;
my $line;
foreach $line (split(/\x00/,$rawline)) {
$line =~ s/\s+$//;
$this->{'last_active'} = time();
delete($this->{'ping_waiting'});
$line =~ /^\S+ (\S+) .+$/;
my $command = $1;
# Parsing stuff from a server is a bit more complicated than parsing
# for a user.
if(ref($commands->{$command})) {
&{$commands->{$command}}($this,$line);
} else {
if($line =~ /[\w\d\s]/) {
Utils::syslog('notice', "Received unknown command string \"$line\" from ".$this->name);
}
}
}
}
# :remote PING :string
sub handle_ping {
my $this = shift;
my($from,$command,$arg) = split(/\s+/,shift,3);
$arg =~ s/^://;
$this->senddata(":".$this->name." PONG :$arg\r\n");
}
# :remote PONG :string
sub handle_pong {
# my $this = shift;
# Don't waste our time doing anything
}
# :remote BU nick username host modestr ircname
sub handle_burstuser {
my $this = shift;
my($from,$command,$nick,$username,$host,$modestr,$ircname) =
split/\s+/,shift,7;
$from =~ s/^://;
$ircname =~ s/^://;
my $user = Connection->new({nick => $nick,
user => $username,
host => $host,
ircname => $ircname,
server => $this,
connected => time});
my @modes = split//,$modestr;
shift @modes;
foreach my $mode (@modes) {
$user->setmode($mode);
}
Utils::users()->{$user->nick()} = $user;
}
# :remote BC name creation modestr modeargs nicklistwmode
sub handle_burstchannel {
my $this = shift;
my($from,$command,$name,$creation,$modestr,@remainder) = split/\s+/,shift;
$from =~ s/^://;
my $channel = Channel->new($name,$creation);
$modestr =~ s/^\+//;
foreach my $mode (split//,$modestr) {
if(Channel::isvalidchannelmode($mode)) {
$channel->{'modes'};
}
}
}
# :remote NICK nick hopcount timestamp username hostname servername ircname
sub handle_nick {
my $this = shift;
my $line = shift;
$line =~ /^:(\S+)/;
my $from = Utils::lookup($1);
if(!ref($from)) {
# network desyncage.
return;
}
if($from->isa("Server")) {
my($remote,$command,$nick,$hopcount,$timestamp,$username,$hostname,
$servername,$ircname) = split(/\s+/,$line,9);
# The user will add itself to the appropriate server itself
my $user = User->new({ 'nick' => $nick,
'user' => $username,
'host' => $hostname,
'ircname' => $ircname,
'server' => Utils::lookup($servername),
'connected' => $timestamp });
Utils::users()->{$user->nick()} = $user;
} elsif($from->isa("User")) {
# User is attempting to change their nick
my($nick,$command,$newnick) = split(/\s+/,$line,3);
} else {
# network weirdness
}
}
# :nick KILL target :excuse
sub handle_kill {
my $this = shift;
}
# :remote QUIT nick excuse
sub handle_quit {
my $this = shift;
my($nick,$command,$excuse) = split(/\s+/,shift,3);
# redistribute the quit message to other servers
$nick =~ s/^://;
$excuse =~ s/^://;
my $user = Utils::lookup($nick);
if(ref($user) && $user->isa("User")) {
$user->quit($excuse);
} else {
Utils::syslog('notice', "Attempted to quit user who doesn't exist to us.");
# woo! network desync, getting quits from users we don't know about
}
}
# :nick AWAY :excuse
sub handle_away {
my $this = shift;
my($nick,$command,$excuse) = split/\s+/,shift,3;
$nick =~ s/^://;
$excuse =~ s/^://;
my $user = Utils::lookup($nick);
if(ref($user) && $user->isa("User")) {
if(defined($excuse)) {
$user->{'awaymsg'} = $excuse;
} else {
delete($user->{'awaymsg'});
}
} else {
# network desyncage.
}
}
# :nick JOIN :#channel1,#channel2,...
sub handle_join {
my $this = shift;
my($nick,$command,$channels) = split/\s+/,shift,3;
$nick =~ s/^://;
$channels =~ s/^://;
my $user = Utils::lookup($nick);
if(ref($user) && $user->isa("User")) {
my @channels = split/,/,$channels;
foreach my $channel (@channels) {
$channel = Utils::lookup($channel);
if(ref($channel) && $channel->isa("Channel")) {
$channel->force_join($user,$this);
}
}
} else {
# Network desyncage
}
}
# :nick PART :#channel1,#channel2,...
sub handle_part {
my $this = shift;
my($nick,$command,$channels) = split/\s+/,shift,3;
$nick =~ s/^://;
$channels =~ s/^://;
my $user = Utils::lookup($nick);
if(ref($user) && $user->isa("User")) {
my @channels = split/,/,$channels;
foreach my $channel (@channels) {
$channel = Utils::lookup($channel);
if(ref($channel) && $channel->isa("Channel")) {
$channel->part($user,$this);
}
}
} else {
# Network desyncage
}
}
#######################################################################
sub squit {
my $this = shift;
# we need to descend our tree of children, announcing the signoff of
# every one of them, then announce the server disconnect(s) and dump
# all the data structures. non-trivial.
# for now:
my $user;
foreach $user ($this->users()) {
$user->quit(join(' ',$this->parent->name,$this->name));
}
# Tell our parent we're gone
$this->parent->removechildserver($this);
# Remove us from the Servers hash
delete(Utils::servers()->{$this->name()});
# Close our socket if we have one
if($this->{'socket'}) {
&main::finishclient($this->{'socket'});
}
}
#####################################################################
# SENDING THE SERVER STUFF
##########################
########################
# User state information
# Takes a User as the argument, sends the server all requisite information
# about that user.
sub nick {
my $this = shift;
my $user = shift;
$this->senddata(join(' ',
":".$this->parent->name,
"NICK",
$user->nick,
$user->server->hops+1,
$user->connected,
$user->username,
$user->host,
$user->server->name,
$user->ircname)."\r\n");
}
# Takes a user and their excuse as the arguments and informs
# $this of that user's disconnection
sub uquit {
my $this = shift;
my $user = shift;
my $excuse = shift;
$this->senddata(join(' ',
":".$user->nick,
"QUIT",
$excuse)."\r\n");
}
###############
# Channel state
sub join {
my $this = shift;
my $user = shift;
my $channel = shift;
$this->senddata(join(' ',
":".$user->nick,
"JOIN",
$channel->name)."\r\n");
}
sub part {
my $this = shift;
my $user = shift;
my $channel = shift;
$this->senddata(join(' ',
":".$user->nick,
"PART",
$channel->name)."\r\n");
}
sub mode {
my $this = shift;
my $from = shift;
my $target = shift;
my $str = shift;
$this->senddata(join(' ',
":".($from->isa("User")?$from->nick:$from->name),
"MODE",
($target->isa("User")?$target->nick:$target->name),
$str)."\r\n");
}
# Dispatch a wallops to this server
sub wallops {
my $this = shift;
my($from,$message) = @_;
my $fromstr = "*unknown*";
if($from->isa("User")) {
$fromstr = $from->nick;
} elsif($from->isa("Server")) {
$fromstr = $from->name;
}
$this->senddata(join(' ',
":".$fromstr,
"WALLOPS",
$message)."\r\n");
}
sub ping {
my $this = shift;
if($this->{'socket'}) {
$this->{ping_waiting} = 1;
$this->senddata(":".$this->{'server'}->name." PING :".$this->{'server'}->name."\r\n");
} else {
}
}
############################
# DATA ACCESSING SUBROUTINES
############################
# Get the name of this IRC server
sub name {
my $this = shift;
return $this->{'name'};
}
sub description {
my $this = shift;
return $this->{'description'};
}
# Returns an array of all the users on
# the server
sub users {
my $this = shift;
my @foo = values(%{$this->{users}});
return @foo;
}
# Returns an array of all the children servers
sub children {
my $this = shift;
my @foo = values(%{$this->{children}});
return @foo;
}
sub last_active {
my $this = shift;
return $this->{'last_active'};
}
sub connected {
my $this = shift;
return $this->{'connected'};
}
sub ping_in_air {
my $this = shift;
if($this->{'ping_waiting'}) {
return 1;
} else {
return 0;
}
}
# Returns the parent server of this server.
# (if you keep finding the parent of the parent
# until there isn't one, (this server) and then
# go back one, you'll have the server that a message
# has to be sent through to be routed properly.)
sub parent {
my $this = shift;
return $this->{'server'};
}
sub server {
my $this = shift;
return $this->{'server'};
}
# Returns the number of hops to reach the local
# server from the server represented by this
# server object.
sub hops {
my $this = shift;
return ($this->parent->hops+1);
}
###############################
# DATA MANIPULATING SUBROUTINES
###############################
# Tells the server that this person is now on it
sub adduser {
my $this = shift;
my $user = shift;
$this->{'users'}->{$user->nick()} = $user;
}
sub removeuser {
my $this = shift;
my $user = shift;
# This allows us to remove a user by their nick
# or their User object.
my $nick;
if(ref($user)) {
$nick = $user->nick();
} else {
$nick = $user;
}
Utils::syslog('notice', "server ".$this->name." is being requested to remove user $nick");
delete($this->{'users'}->{$nick});
}
# Adds a server to the list of ones on this one.
sub addchildserver {
my $this = shift;
my $child = shift;
$this->{'children'}->{$child->name()} = $child;
}
# Removes a server from the list of ones on this one.
sub removechildserver {
my $this = shift;
my $child = shift;
my $name;
if(ref($child)) {
$name = $child->name();
} else {
$name = $child;
}
delete($this->{'children'}->{$name});
}
#####################################################################
# RAW, LOW-LEVEL OR MISC SUBROUTINES
####################################
# Add a command to the hash of commandname->subroutine refs
sub addcommand {
my $this = shift;
my $command = shift;
my $subref = shift;
$this->{'commands'}->{$command} = $subref;
}
sub senddata {
my $this = shift;
$this->{'outbuffer'}->{$this->{'socket'}} .= join('',@_);
}
1;