Free tcp software for linux

C++ Sockets is a C++ wrapper for BSD-style sockets.
Main features:
- SSL support
- IPv6 support
- tcp and udp sockets
- encrypted tcp
- http protocol
- highly customizable error handling
Enhancements:
- A fatal bug in LineProtocol/Online when a CRLF happened over a read buffer boundary has been fixed.
- New output buffer logic.
- OnWriteComplete callback has been added, which fires after the output buffer has been transferred.

POE::Component::Server::Syslog is a Perl module with syslog services for POE.

SYNOPSIS

POE::Component::Server::Syslog->spawn(
Type => udp, # or tcp
BindAddress => 127.0.0.1,
BindPort => 514,
InputState => &input,
);

sub input {
my $message = $_[ARG0];
# .. do stuff ..
}

POE::Component::Proxy::TCP is a simplified TCP proxy.

SYNOPSIS

use POE qw(Component::Proxy::TCP);
POE::Component::Proxy::TCP->new
(Alias => "ProxyServerSessionAlias",
Port => $local_server_port,
OrigPort => $remote_server_port,
OrigAddress => $remote_server_host,
DataFromClient => &data_from_client_handler,
DataFromServer => &data_from_server_handler,
);


# gets called with data passed from server.
# called inside the per client connected session created by PoCo::Server::TCP
sub data_from_server_handler {
my $server_data = shift;
# show obtaining other session info esp per proxy session info
};

# gets called with data passed from remote client
#
sub data_from_client_handler {
my $server_data = shift;
};

# show obtaining other session info esp per proxy session info
# Reserved HEAP variables:

$heap->{self} = Proxy object / instance var hash
$heap->{self}->losta stuff add documentation
[do the per connection ones]
EXAMPLE ^
use warnings;
use strict;
use diagnostics;
use POE;
use POE::Filter::Stream;
use POE::Filter::Line;
use POE::Component::Proxy::TCP;
$|++;

POE::Component::Proxy::TCP->new
(Alias => "ProxyServerSessionAlias",
Port => 4000,
OrigPort => 5000,
OrigAddress => "localhost",
DataFromClient => sub {print "From client:", shift(), "n";},
DataFromServer => sub {print "From server:", shift(), "n";},
RemoteClientFilter => "POE::Filter::Stream",
RemoteServerOutputFilter => "POE::Filter::Stream",
RemoteServerInputFilter => "POE::Filter::Stream"
);

$poe_kernel->run();
exit 0;