source: source/ariba/utility/transport/tcpip/tcpip.cpp@ 6849

#include "tcpip.hpp"

#define _NO_LOGGING

// std includes
#include <unistd.h>
#include <iostream>
#include <string>
#include <sstream>
#include <boost/foreach.hpp>

// protlib includes
#include "protlib/network_message.h"
#include "protlib/tp_over_tcp.h"
#include "protlib/tperror.h"
#include "protlib/logfile.h"
#include "protlib/queuemanager.h"
#include "protlib/threadsafe_db.h"
#include "protlib/setuid.h"

// protlib namespaces
using namespace protlib;
using namespace protlib::log;

logfile commonlog;
protlib::log::logfile& protlib::log::DefaultLog(commonlog);

namespace ariba {
namespace transport {

using namespace ariba::addressing;


tcpip_endpoint convert( const appladdress* addr ) {
        const char* ip_str = addr->get_ip_str();
        tcpip_endpoint endpoint( std::string(ip_str), addr->get_port() );
        return endpoint;
}

appladdress convert( const tcpip_endpoint& endpoint ) {
        tcpip_endpoint* e = const_cast<tcpip_endpoint*>(&endpoint);
        appladdress
                peer(e->address().to_string().c_str(), "tcp", e->port().asio() );
//      cout << endpoint.to_string() << " to " << peer.get_ip_str() << ":" << peer.get_port() << endl;
        return peer;
}

tcpip::tcpip( uint16_t port ) {
        this->done = false;
        this->running = false;
        this->port = port;
        this->listener = NULL;
}

tcpip::~tcpip() {
        if (running) stop();
}

bool get_message_length( NetMsg& m, uint32& clen_bytes ) {
        clen_bytes = m.decode32();
        m.set_pos_r(-4);
        return true;
}

void tcpip::start() {
        done = false;
        running = false;

        // initalize netdb and setuid
        protlib::tsdb::init();
        protlib::setuid::init();

        // set tcp parameters
        port_t port = this->port; // port
        TPoverTCPParam tppar(4, get_message_length, port);

        // create receiver thread
        FastQueue* tpchecker_fq = new FastQueue("TCPTransport", true);
        QueueManager::instance()->register_queue(tpchecker_fq,
                        message::qaddr_signaling);

        // start thread
        pthread_create( &tpreceivethread, NULL, tcpip::receiverThread, this );
        tpthread = new ThreadStarter<TPoverTCP, TPoverTCPParam> ( 1, tppar );
        tpthread->start_processing();
}

void tcpip::stop() {
        // stop receiver thread
        done = true;

        // stop TPoverTCP
        tpthread->stop_processing();
        tpthread->abort_processing(true);
        tpthread->wait_until_stopped();

        // unregister TPoverTCP
        QueueManager::instance()->unregister_queue( message::qaddr_signaling );

        // destroy QueueManager
        QueueManager::clear();

        // de-initalize netdb and setuid
        protlib::setuid::end();
        protlib::tsdb::end();
}

void tcpip::send( const address_v* remote, const uint8_t* data, size_t size ) {

        // prepare netmsg with length and and port
        NetMsg* datamsg = new NetMsg(size + 6);
        datamsg->encode32( size + 2,  true );
        datamsg->encode16( this->port,true );

        for (size_t i=0; i<size; i++)
                datamsg->encode8( data[i],true );

        // send message
        tcpip_endpoint endpoint = *remote;
        appladdress peer = convert(endpoint);

        // add to output queue
        tpthread->get_thread_object()->send( datamsg, peer, false );
}

void tcpip::send( const endpoint_set& endpoints, const uint8_t* data, size_t size ) {
        // send a message to each combination of ip-address and port
        BOOST_FOREACH( const ip_address ip, endpoints.ip ) {
                BOOST_FOREACH( const tcp_port_address port, endpoints.tcp ) {
                        tcpip_endpoint endpoint(ip,port);
                        address_vf vf = endpoint;
                        send(vf,data,size);
                }
        }
}

void tcpip::terminate( const address_v* remote) {
        tcpip_endpoint endpoint = *remote;
        appladdress peer = convert(endpoint);
        peer.convert_to_ipv6();
        tpthread->get_thread_object()->terminate( peer );
}

void tcpip::register_listener( transport_listener* listener ) {
        this->listener = listener;
}

void* tcpip::receiverThread( void* ptp ) {
        // get reference to transport object
        tcpip& tp = *((tcpip*)ptp);

        // get queue
        FastQueue* fq =
                QueueManager::instance()->get_queue(message::qaddr_signaling);

        // main processing loop
        tp.running = true;
        while (!tp.done) {

                // wait for new message to approach
                message* msg = fq->dequeue_timedwait(300);

                // message has arrived? no-> continue
                if (!msg) continue;

                // handle transport message
                TPMsg* tpmsg = dynamic_cast<TPMsg*> (msg);
                if (!tpmsg) {
                        continue;
                }

                // get address & message
                const appladdress* remote_peer = static_cast<const appladdress*>( tpmsg->get_peeraddress() );
                const appladdress* local_peer  = static_cast<const appladdress*>( tpmsg->get_ownaddress() );
                NetMsg* datamsg = tpmsg->get_message();

                // not a data message? -> continue!
                if (!datamsg) {
                        continue;
                }

                // get length and remote endpoint port
                datamsg->set_pos(0);
                uint32_t message_size = datamsg->decode32(true)-2;
                uint16_t remote_port = datamsg->decode16(true);


                // inform listener
                if (tp.listener != NULL) {
                        tcpip_endpoint remote = convert(remote_peer);
                        tcpip_endpoint local  = convert(local_peer);
                        tp.listener->receive_message(
                                        &tp, local, remote, datamsg->get_buffer()+6, message_size );

                }
                delete tpmsg;
        }
        // clean queue & stop
        fq->cleanup();
        tp.running = false;
        return NULL;
}

}} // namespace ariba::transport