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/*
* Connection.cpp
*
* Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Connection.h"
#include "IPAddress.h"
#include <cstring>
#include <sys/socket.h>
namespace Mad {
namespace Net {
void Connection::handshake() {
state = HANDSHAKE;
int ret = gnutls_handshake(session);
if(ret < 0) {
if(ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN)
return;
// Error... disconnect
return;
}
state = CONNECTION_HEADER;
connectionHeader();
}
void Connection::packetHeaderReceiveHandler(const void *data, unsigned long length) {
if(length != sizeof(Packet::Data))
return; // Error... disconnect?
header = *reinterpret_cast<const Packet::Data*>(data);
if(header.length == 0) {
signal(this, Packet(header.type, header.requestId));
enterReceiveLoop();
}
else {
state = PACKET_DATA;
rawReceive(header.length, sigc::mem_fun(this, &Connection::packetDataReceiveHandler));
}
}
void Connection::packetDataReceiveHandler(const void *data, unsigned long length) {
if(length != header.length)
return; // Error... disconnect?
signal(this, Packet(header.type, header.requestId, data, length));
enterReceiveLoop();
}
void Connection::doReceive() {
if(!isConnected())
return;
if(receiveComplete())
return;
ssize_t ret = gnutls_record_recv(session, transR.data+transR.transmitted, transR.length-transR.transmitted);
if(ret < 0) {
if(ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN)
return;
// Error... disconnect?
return;
}
transR.transmitted += ret;
if(receiveComplete()) {
// Save data pointer, as transR.notify might start a new reception
unsigned char *data = transR.data;
transR.data = 0;
transR.notify(data, transR.length);
delete [] data;
}
}
bool Connection::rawReceive(unsigned long length,
const sigc::slot<void,const void*,unsigned long> ¬ify)
{
if(!isConnected())
return false;
if(!receiveComplete())
return false;
transR.data = new unsigned char[length];
transR.length = length;
transR.transmitted = 0;
transR.notify = notify;
return true;
}
void Connection::doSend() {
if(!isConnected())
return;
while(!sendQueueEmpty()) {
ssize_t ret = gnutls_record_send(session, transS.front().data+transS.front().transmitted,
transS.front().length-transS.front().transmitted);
if(ret < 0) {
if(ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN)
return;
// Error... disconnect?
return;
}
transS.front().transmitted += ret;
if(transS.front().transmitted == transS.front().length) {
delete [] transS.front().data;
transS.pop();
}
}
}
bool Connection::rawSend(const unsigned char *data, unsigned long length) {
if(!isConnected())
return false;
Transmission trans = {length, 0, new unsigned char[length], sigc::slot<void,const void*,unsigned long>()};
std::memcpy(trans.data, data, length);
transS.push(trans);
return true;
}
void Connection::disconnect() {
if(!isConnected())
return;
gnutls_bye(session, GNUTLS_SHUT_RDWR);
shutdown(sock, SHUT_RDWR);
close(sock);
gnutls_deinit(session);
if(peer)
delete peer;
peer = 0;
state = DISCONNECTED;
}
}
}
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