use DXUtil;
+use AnyEvent;
+use AnyEvent::Handle;
+use AnyEvent::Socket;
+
use DXDebug;
use Timer;
-use vars qw(%rd_callbacks %wt_callbacks %er_callbacks $rd_handles $wt_handles $er_handles $now %conns $noconns $blocking_supported $cnum $total_in $total_out $io_socket);
+use vars qw(%conns $noconns $cnum $total_in $total_out);
-%rd_callbacks = ();
-%wt_callbacks = ();
-%er_callbacks = ();
-$rd_handles = IO::Select->new();
-$wt_handles = IO::Select->new();
-$er_handles = IO::Select->new();
$total_in = $total_out = 0;
-
-$now = time;
-
-BEGIN {
- # Checks if blocking is supported
- eval {
- local $^W;
- require POSIX; POSIX->import(qw(O_NONBLOCK F_SETFL F_GETFL))
- };
-
- eval {
- local $^W;
- require IO::Socket::INET6;
- };
-
- if ($@) {
- dbg($@);
- require IO::Socket;
- $io_socket = 'IO::Socket::INET';
- } else {
- $io_socket = 'IO::Socket::INET6';
- }
- $io_socket->import;
-
- if ($@ || $main::is_win) {
- $blocking_supported = $io_socket->can('blocking') ? 2 : 0;
- } else {
- $blocking_supported = $io_socket->can('blocking') ? 2 : 1;
- }
-
-
- # import as many of these errno values as are available
- eval {
- local $^W;
- require Errno; Errno->import(qw(EAGAIN EINPROGRESS EWOULDBLOCK));
- };
-
- unless ($^O eq 'MSWin32') {
- if ($] >= 5.6) {
- eval {
- local $^W;
- require Socket; Socket->import(qw(IPPROTO_TCP TCP_NODELAY));
- };
- } else {
- dbg("IPPROTO_TCP and TCP_NODELAY manually defined");
- eval 'sub IPPROTO_TCP { 6 };';
- eval 'sub TCP_NODELAY { 1 };';
- }
- }
- # http://support.microsoft.com/support/kb/articles/Q150/5/37.asp
- # defines EINPROGRESS as 10035. We provide it here because some
- # Win32 users report POSIX::EINPROGRESS is not vendor-supported.
- if ($^O eq 'MSWin32') {
- eval '*EINPROGRESS = sub { 10036 };' unless defined *EINPROGRESS;
- eval '*EWOULDBLOCK = *EAGAIN = sub { 10035 };' unless defined *EWOULDBLOCK;
- eval '*F_GETFL = sub { 0 };' unless defined *F_GETFL;
- eval '*F_SETFL = sub { 0 };' unless defined *F_SETFL;
- eval 'sub IPPROTO_TCP { 6 };';
- eval 'sub TCP_NODELAY { 1 };';
- $blocking_supported = 0; # it appears that this DOESN'T work :-(
- }
-}
-
-my $w = $^W;
-$^W = 0;
-my $eagain = eval {EAGAIN()};
-my $einprogress = eval {EINPROGRESS()};
-my $ewouldblock = eval {EWOULDBLOCK()};
-$^W = $w;
$cnum = 0;
-
#
#-----------------------------------------------------------------
# Generalised initializer
my $conn = shift;
my $callback = shift;
$conn->{eproc} = $callback;
- set_event_handler($conn->{sock}, error => $callback) if exists $conn->{sock};
}
sub set_rproc
$conn->{rproc} = $callback;
}
-sub blocking
-{
- return unless $blocking_supported;
-
- # Make the handle stop blocking, the Windows way.
- if ($blocking_supported) {
- $_[0]->blocking($_[1]);
- } else {
- my $flags = fcntl ($_[0], F_GETFL, 0);
- if ($_[1]) {
- $flags &= ~O_NONBLOCK;
- } else {
- $flags |= O_NONBLOCK;
- }
- fcntl ($_[0], F_SETFL, $flags);
- }
-}
-
# save it
sub conns
{
# Create a connection end-point object
my $conn = $pkg;
- unless (ref $pkg) {
- $conn = $pkg->new($rproc);
- }
+ $conn = $pkg->new($rproc);
$conn->{peerhost} = $to_host;
$conn->{peerport} = $to_port;
$conn->{sort} = 'Outgoing';
- my $sock;
- if ($blocking_supported) {
- $sock = $io_socket->new(PeerAddr => $to_host, PeerPort => $to_port, Proto => 'tcp', Blocking =>0) or return undef;
- } else {
- # Create a new internet socket
- $sock = $io_socket->new();
- return undef unless $sock;
+ my $sock = AnyEvent::Handle->new(
- my $proto = getprotobyname('tcp');
- $sock->socket(AF_INET, SOCK_STREAM, $proto) or return undef;
+ connect => [$to_host, $to_port],
- blocking($sock, 0);
- $conn->{blocking} = 0;
+# on_connect => sub {my $h = shift; $conn->{peerhost} = $h->handle->peername;},
- # does the host resolve?
- my $ip = gethostbyname($to_host);
- return undef unless $ip;
+ on_eof => sub {$conn->disconnect},
- my $r = connect($sock, pack_sockaddr_in($to_port, $ip));
- return undef unless $r || _err_will_block($!);
- }
+ on_error => sub {$conn->disconnect},
+
+ keepalive => 1,
+
+ linger => 0,
+ );
$conn->{sock} = $sock;
- $conn->{peerhost} = $sock->peerhost; # for consistency
+ $sock->on_read(sub{$conn->_rcv});
- if ($conn->{rproc}) {
- my $callback = sub {$conn->_rcv};
- set_event_handler ($sock, read => $callback);
- }
return $conn;
}
my ($conn, $line, $sort) = @_;
my $pid;
- local $^F = 10000; # make sure it ain't closed on exec
- my ($a, $b) = $io_socket->socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC);
- if ($a && $b) {
- $a->autoflush(1);
- $b->autoflush(1);
- $pid = fork;
- if (defined $pid) {
- if ($pid) {
- close $b;
- $conn->{sock} = $a;
- $conn->{csort} = $sort;
- $conn->{lineend} = "\cM" if $sort eq 'ax25';
- $conn->{pid} = $pid;
- if ($conn->{rproc}) {
- my $callback = sub {$conn->_rcv};
- Msg::set_event_handler ($a, read => $callback);
- }
- dbg("connect $conn->{cnum}: started pid: $conn->{pid} as $line") if isdbg('connect');
- } else {
- $^W = 0;
- dbgclose();
- STDIN->close;
- STDOUT->close;
- STDOUT->close;
- *STDIN = IO::File->new_from_fd($b, 'r') or die;
- *STDOUT = IO::File->new_from_fd($b, 'w') or die;
- *STDERR = IO::File->new_from_fd($b, 'w') or die;
- close $a;
- unless ($main::is_win) {
- # $SIG{HUP} = 'IGNORE';
- $SIG{HUP} = $SIG{CHLD} = $SIG{TERM} = $SIG{INT} = 'DEFAULT';
- alarm(0);
- }
- exec "$line" or dbg("exec '$line' failed $!");
- }
- } else {
- dbg("cannot fork for $line");
- }
- } else {
- dbg("no socket pair $! for $line");
- }
+# local $^F = 10000; # make sure it ain't closed on exec
+# my ($a, $b) = $io_socket->socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC);
+# if ($a && $b) {
+# $a->autoflush(1);
+# $b->autoflush(1);
+# $pid = fork;
+# if (defined $pid) {
+# if ($pid) {
+# close $b;
+# $conn->{sock} = $a;
+# $conn->{csort} = $sort;
+# $conn->{lineend} = "\cM" if $sort eq 'ax25';
+# $conn->{pid} = $pid;
+# if ($conn->{rproc}) {
+# my $callback = sub {$conn->_rcv};
+# Msg::set_event_handler ($a, read => $callback);
+# }
+# dbg("connect $conn->{cnum}: started pid: $conn->{pid} as $line") if isdbg('connect');
+# } else {
+# $^W = 0;
+# dbgclose();
+# STDIN->close;
+# STDOUT->close;
+# STDOUT->close;
+# *STDIN = IO::File->new_from_fd($b, 'r') or die;
+# *STDOUT = IO::File->new_from_fd($b, 'w') or die;
+# *STDERR = IO::File->new_from_fd($b, 'w') or die;
+# close $a;
+# unless ($main::is_win) {
+# # $SIG{HUP} = 'IGNORE';
+# $SIG{HUP} = $SIG{CHLD} = $SIG{TERM} = $SIG{INT} = 'DEFAULT';
+# alarm(0);
+# }
+# exec "$line" or dbg("exec '$line' failed $!");
+# }
+# } else {
+# dbg("cannot fork for $line");
+# }
+# } else {
+# dbg("no socket pair $! for $line");
+# }
return $pid;
}
}
if (defined($sock)) {
- set_event_handler ($sock, read => undef, write => undef, error => undef);
- shutdown($sock, 2);
- close($sock);
+ $sock->destroy;
}
unless ($main::is_win) {
}
}
-sub send_now {
- my ($conn, $msg) = @_;
- $conn->enqueue($msg);
- $conn->_send (1); # 1 ==> flush
+sub _send_stuff
+{
+ my $conn = shift;
+ my $rq = $conn->{outqueue};
+ my $sock = $conn->{sock};
+
+ while (@$rq) {
+ my $data = shift @$rq;
+ my $lth = length $data;
+ if (isdbg('raw')) {
+ my $call = $conn->{call} || 'none';
+ if (isdbg('raw')) {
+ dbgdump('raw', "$call send $lth: ", $lth);
+ }
+ }
+ $sock->push_write($data);
+ $total_out = $lth;
+ }
}
sub send_later {
my ($conn, $msg) = @_;
- $conn->enqueue($msg);
- my $sock = $conn->{sock};
- return unless defined($sock);
- set_event_handler ($sock, write => sub {$conn->_send(0)});
-}
+ my $rq = $conn->{outqueue};
+ my $sock = $conn->{sock};
-sub enqueue {
- my $conn = shift;
- push (@{$conn->{outqueue}}, defined $_[0] ? $_[0] : '');
+ # this is done like this because enqueueing may be going on independently of
+ # sending (whether later or now)
+ $conn->enqueue($msg);
+ _send_stuff($conn)
}
-sub _send {
- my ($conn, $flush) = @_;
- my $sock = $conn->{sock};
- return unless defined($sock);
- my $rq = $conn->{outqueue};
-
- # If $flush is set, set the socket to blocking, and send all
- # messages in the queue - return only if there's an error
- # If $flush is 0 (deferred mode) make the socket non-blocking, and
- # return to the event loop only after every message, or if it
- # is likely to block in the middle of a message.
+sub send_now { goto &send_later; }
-# if ($conn->{blocking} != $flush) {
-# blocking($sock, $flush);
-# $conn->{blocking} = $flush;
-# }
- my $offset = (exists $conn->{send_offset}) ? $conn->{send_offset} : 0;
-
- while (@$rq) {
- my $msg = $rq->[0];
- my $mlth = length($msg);
- my $bytes_to_write = $mlth - $offset;
- my $bytes_written = 0;
- confess("Negative Length! msg: '$msg' lth: $mlth offset: $offset") if $bytes_to_write < 0;
- while ($bytes_to_write > 0) {
- $bytes_written = syswrite ($sock, $msg,
- $bytes_to_write, $offset);
- if (!defined($bytes_written)) {
- if (_err_will_block($!)) {
- # Should happen only in deferred mode. Record how
- # much we have already sent.
- $conn->{send_offset} = $offset;
- # Event handler should already be set, so we will
- # be called back eventually, and will resume sending
- return 1;
- } else { # Uh, oh
- &{$conn->{eproc}}($conn, $!) if exists $conn->{eproc};
- $conn->disconnect;
- return 0; # fail. Message remains in queue ..
- }
- } elsif (isdbg('raw')) {
- my $call = $conn->{call} || 'none';
- dbgdump('raw', "$call send $bytes_written: ", $msg);
- }
- $total_out += $bytes_written;
- $offset += $bytes_written;
- $bytes_to_write -= $bytes_written;
- }
- delete $conn->{send_offset};
- $offset = 0;
- shift @$rq;
- #last unless $flush; # Go back to select and wait
- # for it to fire again.
- }
- # Call me back if queue has not been drained.
- unless (@$rq) {
- set_event_handler ($sock, write => undef);
- if (exists $conn->{close_on_empty}) {
- &{$conn->{eproc}}($conn, undef) if exists $conn->{eproc};
- $conn->disconnect;
- }
- }
- 1; # Success
+sub send_raw
+{
+ my ($conn, $msg) = @_;
+ push @{$conn->{outqueue}}, $msg;
+ _send_stuff($conn);
}
-sub dup_sock
-{
- my $conn = shift;
- my $oldsock = $conn->{sock};
- my $rc = $rd_callbacks{$oldsock};
- my $wc = $wt_callbacks{$oldsock};
- my $ec = $er_callbacks{$oldsock};
- my $sock = $oldsock->new_from_fd($oldsock, "w+");
- if ($sock) {
- set_event_handler($oldsock, read=>undef, write=>undef, error=>undef);
- $conn->{sock} = $sock;
- set_event_handler($sock, read=>$rc, write=>$wc, error=>$ec);
- $oldsock->close;
- }
+sub enqueue {
+ my $conn = shift;
+ push (@{$conn->{outqueue}}, defined $_[0] ? $_[0] : '');
}
sub _err_will_block {
- return 0 unless $blocking_supported;
- return ($_[0] == $eagain || $_[0] == $ewouldblock || $_[0] == $einprogress);
+ return 0;
}
sub close_on_empty
{
my $conn = shift;
- $conn->{close_on_empty} = 1;
+ $conn->{sock}->push_shutdown;
}
#-----------------------------------------------------------------
my ($pkg, $my_host, $my_port, $login_proc) = @_;
my $self = $pkg->new($login_proc);
- $self->{sock} = $io_socket->new (
- LocalAddr => "$my_host:$my_port",
-# LocalPort => $my_port,
- Listen => SOMAXCONN,
- Proto => 'tcp',
- Reuse => 1);
+ $self->{sock} = tcp_server $my_host, $my_port, sub { $self->new_client(@_); }, sub { return 256; };
die "Could not create socket: $! \n" unless $self->{sock};
- set_event_handler ($self->{sock}, read => sub { $self->new_client } );
return $self;
}
sub nolinger
{
my $conn = shift;
-
- unless ($main::is_win) {
- if (isdbg('sock')) {
- my ($l, $t) = unpack "ll", getsockopt($conn->{sock}, SOL_SOCKET, SO_LINGER);
- my $k = unpack 'l', getsockopt($conn->{sock}, SOL_SOCKET, SO_KEEPALIVE);
- my $n = $main::is_win ? 0 : unpack "l", getsockopt($conn->{sock}, IPPROTO_TCP, TCP_NODELAY);
- dbg("Linger is: $l $t, keepalive: $k, nagle: $n");
- }
-
- eval {setsockopt($conn->{sock}, SOL_SOCKET, SO_KEEPALIVE, 1)} or dbg("setsockopt keepalive: $!");
- eval {setsockopt($conn->{sock}, SOL_SOCKET, SO_LINGER, pack("ll", 0, 0))} or dbg("setsockopt linger: $!");
- eval {setsockopt($conn->{sock}, IPPROTO_TCP, TCP_NODELAY, 1)} or eval {setsockopt($conn->{sock}, SOL_SOCKET, TCP_NODELAY, 1)} or dbg("setsockopt tcp_nodelay: $!");
- $conn->{sock}->autoflush(0);
-
- if (isdbg('sock')) {
- my ($l, $t) = unpack "ll", getsockopt($conn->{sock}, SOL_SOCKET, SO_LINGER);
- my $k = unpack 'l', getsockopt($conn->{sock}, SOL_SOCKET, SO_KEEPALIVE);
- my $n = $main::is_win ? 0 : unpack "l", getsockopt($conn->{sock}, IPPROTO_TCP, TCP_NODELAY);
- dbg("Linger is: $l $t, keepalive: $k, nagle: $n");
- }
- }
+ my $sock = $conn->{sock};
+# $sock->linger(0);
+# $sock->keepalive(1);
}
sub dequeue
return unless defined($sock);
my @lines;
-# if ($conn->{blocking}) {
-# blocking($sock, 0);
-# $conn->{blocking} = 0;
-# }
- $bytes_read = sysread ($sock, $msg, 1024, 0);
- if (defined ($bytes_read)) {
- if ($bytes_read > 0) {
- $total_in += $bytes_read;
- if (isdbg('raw')) {
- my $call = $conn->{call} || 'none';
- dbgdump('raw', "$call read $bytes_read: ", $msg);
- }
- if ($conn->{echo}) {
- my @ch = split //, $msg;
- my $out;
- for (@ch) {
- if (/[\cH\x7f]/) {
- $out .= "\cH \cH";
- $conn->{msg} =~ s/.$//;
- } else {
- $out .= $_;
- $conn->{msg} .= $_;
- }
- }
- if (defined $out) {
- set_event_handler ($sock, write => sub{$conn->_send(0)});
- push @{$conn->{outqueue}}, $out;
+ $msg = $sock->{rbuf};
+ $bytes_read = length $msg || 0;
+ $sock->{rbuf} = '';
+
+ if ($bytes_read > 0) {
+ $total_in += $bytes_read;
+ if (isdbg('raw')) {
+ my $call = $conn->{call} || 'none';
+ dbgdump('raw', "$call read $bytes_read: ", $msg);
+ }
+ if ($conn->{echo}) {
+ my @ch = split //, $msg;
+ my $out;
+ for (@ch) {
+ if (/[\cH\x7f]/) {
+ $out .= "\cH \cH";
+ $conn->{msg} =~ s/.$//;
+ } else {
+ $out .= $_;
+ $conn->{msg} .= $_;
}
- } else {
- $conn->{msg} .= $msg;
}
- }
- } else {
- if (_err_will_block($!)) {
- return ;
+ if (defined $out) {
+ $conn->send_now($out);
+ }
} else {
- $bytes_read = 0;
+ $conn->{msg} .= $msg;
}
- }
+ }
-FINISH:
- if (defined $bytes_read && $bytes_read == 0) {
- &{$conn->{eproc}}($conn, $!) if exists $conn->{eproc};
- $conn->disconnect;
- } else {
- unless ($conn->{disable_read}) {
- $conn->dequeue if exists $conn->{msg};
- }
+ unless ($conn->{disable_read}) {
+ $conn->dequeue if exists $conn->{msg};
}
}
sub new_client {
my $server_conn = shift;
- my $sock = $server_conn->{sock}->accept();
+ my $sock = shift;
+ my $peerhost = shift;
+ my $peerport = shift;
if ($sock) {
my $conn = $server_conn->new($server_conn->{rproc});
- $conn->{sock} = $sock;
- blocking($sock, 0);
- $conn->nolinger;
+ $conn->{sock} = AnyEvent::Handle->new(
+
+ fh => $sock,
+
+ on_eof => sub {$conn->disconnect},
+
+ on_error => sub {$conn->disconnect},
+
+ keepalive => 1,
+
+ linger => 0,
+ );
$conn->{blocking} = 0;
- my ($rproc, $eproc) = &{$server_conn->{rproc}} ($conn, $conn->{peerhost} = $sock->peerhost(), $conn->{peerport} = $sock->peerport());
+ my ($rproc, $eproc) = &{$server_conn->{rproc}} ($conn, $conn->{peerhost} = $peerhost, $conn->{peerport} = $peerport);
+ dbg("accept $conn->{cnum} from $conn->{peerhost} $conn->{peerport}") if isdbg('connll');
$conn->{sort} = 'Incoming';
if ($eproc) {
$conn->{eproc} = $eproc;
- set_event_handler ($sock, error => $eproc);
}
if ($rproc) {
$conn->{rproc} = $rproc;
- my $callback = sub {$conn->_rcv};
- set_event_handler ($sock, read => $callback);
+ $conn->{sock}->on_read(sub {$conn->_rcv});
} else { # Login failed
&{$conn->{eproc}}($conn, undef) if exists $conn->{eproc};
$conn->disconnect();
sub close_server
{
my $conn = shift;
- set_event_handler ($conn->{sock}, read => undef, write => undef, error => undef );
- $conn->{sock}->close;
+ undef $conn->{sock};
}
# close all clients (this is for forking really)
sub disable_read
{
my $conn = shift;
- set_event_handler ($conn->{sock}, read => undef);
- return $_[0] ? $conn->{disable_read} = $_[0] : $_[0];
-}
-
-#
-#----------------------------------------------------
-# Event loop routines used by both client and server
-
-sub set_event_handler {
- shift unless ref($_[0]); # shift if first arg is package name
- my ($handle, %args) = @_;
- my $callback;
- if (exists $args{'write'}) {
- $callback = $args{'write'};
- if ($callback) {
- $wt_callbacks{$handle} = $callback;
- $wt_handles->add($handle);
- } else {
- delete $wt_callbacks{$handle};
- $wt_handles->remove($handle);
- }
- }
- if (exists $args{'read'}) {
- $callback = $args{'read'};
- if ($callback) {
- $rd_callbacks{$handle} = $callback;
- $rd_handles->add($handle);
- } else {
- delete $rd_callbacks{$handle};
- $rd_handles->remove($handle);
- }
- }
- if (exists $args{'error'}) {
- $callback = $args{'error'};
- if ($callback) {
- $er_callbacks{$handle} = $callback;
- $er_handles->add($handle);
- } else {
- delete $er_callbacks{$handle};
- $er_handles->remove($handle);
- }
- }
-}
-
-sub event_loop {
- my ($pkg, $loop_count, $timeout, $wronly) = @_; # event_loop(1) to process events once
- my ($conn, $r, $w, $e, $rset, $wset, $eset);
- while (1) {
-
- # Quit the loop if no handles left to process
- if ($wronly) {
- last unless $wt_handles->count();
-
- ($rset, $wset, $eset) = IO::Select->select(undef, $wt_handles, undef, $timeout);
-
- foreach $w (@$wset) {
- &{$wt_callbacks{$w}}($w) if exists $wt_callbacks{$w};
- }
- } else {
-
- last unless ($rd_handles->count() || $wt_handles->count());
-
- ($rset, $wset, $eset) = IO::Select->select($rd_handles, $wt_handles, $er_handles, $timeout);
-
- foreach $e (@$eset) {
- &{$er_callbacks{$e}}($e) if exists $er_callbacks{$e};
- }
- foreach $r (@$rset) {
- &{$rd_callbacks{$r}}($r) if exists $rd_callbacks{$r};
- }
- foreach $w (@$wset) {
- &{$wt_callbacks{$w}}($w) if exists $wt_callbacks{$w};
- }
- }
-
- Timer::handler;
-
- if (defined($loop_count)) {
- last unless --$loop_count;
- }
- }
+ return defined $_[0] ? $conn->{disable_read} = $_[0] : $_[0];
}
sub sleep
{
my ($pkg, $interval) = @_;
- my $now = time;
- while (time - $now < $interval) {
- $pkg->event_loop(10, 0.01);
+ my $cv = AnyEvent->condvar;
+ my $wait_a_bit = AnyEvent->timer(
+ after => $interval,
+ cb => sub {$cv->send},
+ );
+ $cv->recv;
+}
+
+sub set_event_handler
+{
+ my $sock = shift;
+ my %args = @_;
+ my ($pkg, $fn, $line) = caller;
+ my $s;
+ foreach (my ($k,$v) = each %args) {
+ $s .= "$k => $v, ";
}
+ $s =~ s/[\s,]$//;
+ dbg("Msg::set_event_handler called from ${pkg}::${fn} line $line doing $s");
}
sub DESTROY
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