/*
 * ServerConnection.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 "ServerConnection.h"
#include "IPAddress.h"
#include <cstring>
#include <cerrno>
#include <sys/socket.h>
#include <fcntl.h>

namespace Mad {
namespace Net {

void ServerConnection::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 || header->protVerMax < 1)
    // Unsupported protocol... disconnect
    return;
  
  if(header->type == 'C')
    daemon = false;
  else if(header->type == 'D')
    daemon = true;
  else
    // Error... disconnect
    return;
  
  ConnectionHeader header2 = {'M', 'A', 'D', 0, 0, 1, 1, 0};
  
  rawSend(reinterpret_cast<unsigned char*>(&header2), sizeof(header2));
  
  enterReceiveLoop();
}

ServerConnection::ServerConnection(int sock0, const IPAddress &address, gnutls_dh_params_t dh_params)
: daemon(false) {
  sock = sock0;
  
  gnutls_anon_allocate_server_credentials(&anoncred);
  
  
  gnutls_anon_set_server_dh_params(anoncred, dh_params);
  
  peer = new IPAddress(address);
  
  gnutls_init(&session, GNUTLS_SERVER);
  
  gnutls_set_default_priority(session);
  
  const int kx_list[] = {GNUTLS_KX_ANON_DH, 0};
  gnutls_kx_set_priority(session, kx_list);
  
  gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
  
  gnutls_transport_set_lowat(session, 0);
  gnutls_transport_set_ptr(session, reinterpret_cast<gnutls_transport_ptr_t>(sock));
  
  handshake();
}

}
}