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/*
* ClientConnection.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 "ClientConnection.h"
#include "IPAddress.h"
#include <cstring>
#include <cerrno>
#include <sys/socket.h>
#include <sys/select.h>
namespace Mad {
namespace Net {
void ClientConnection::sendConnectionHeader(bool daemon) {
ConnectionHeader header = {'M', 'A', 'D', daemon ? 'D' : 'C', 0, 1, 1, 1};
rawSend(reinterpret_cast<unsigned char*>(&header), sizeof(header));
rawReceive(sizeof(ConnectionHeader), sigc::mem_fun(this, &ClientConnection::connectionHeaderReceiveHandler));
}
void ClientConnection::connectionHeaderReceiveHandler(const void *data, unsigned long length) {
if(length != sizeof(ConnectionHeader))
// Error... disconnect
return;
const ConnectionHeader *header = reinterpret_cast<const ConnectionHeader*>(data);
if(header->m != 'M' || header->a != 'A' || header->d != 'D')
// Error... disconnect
return;
if(header->protVerMin != 1)
// Unsupported protocol... disconnect
return;
connecting = false;
enterReceiveLoop();
}
void ClientConnection::connect(const IPAddress &address, bool daemon) throw(ConnectionException) {
const int kx_list[] = {GNUTLS_KX_ANON_DH, 0};
if(connected)
disconnect();
sock = socket(PF_INET, SOCK_STREAM, 0);
if(sock < 0)
throw ConnectionException("socket()", std::strerror(errno));
peer = new IPAddress(address);
if(::connect(sock, peer->getSockAddr(), peer->getSockAddrLength()) < 0) {
close(sock);
delete peer;
throw ConnectionException("connect()", std::strerror(errno));
}
connected = true;
connecting = true;
gnutls_init(&session, GNUTLS_CLIENT);
gnutls_set_default_priority(session);
gnutls_kx_set_priority(session, kx_list);
gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
gnutls_transport_set_ptr(session, reinterpret_cast<gnutls_transport_ptr_t>(sock));
int ret = gnutls_handshake(session);
if(ret < 0) {
disconnect();
throw ConnectionException("gnutls_handshake()", gnutls_strerror(ret));
}
sendConnectionHeader(daemon);
}
void ClientConnection::disconnect() {
if(!connected)
return;
gnutls_bye(session, GNUTLS_SHUT_RDWR);
shutdown(sock, SHUT_RDWR);
close(sock);
gnutls_deinit(session);
delete peer;
connected = false;
}
bool ClientConnection::dataPending() const {
if(!connected)
return false;
fd_set fds;
FD_ZERO(&fds);
FD_SET(sock, &fds);
struct timeval timeout = {0, 0};
return (select(sock + 1, &fds, NULL, NULL, &timeout) == 1);
}
}
}
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