/*
 * 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 "FdManager.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 = (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};

  enterReceiveLoop();

  rawSend((uint8_t*)&header2, sizeof(header2));
}

ServerConnection::ServerConnection(int sock0, const IPAddress &address, gnutls_dh_params_t dh_params, const std::string &x905CertFile, const std::string &x905KeyFile)
: daemon(false) {
  gl_rwlock_wrlock(stateLock);

  sock = sock0;

  peer = new IPAddress(address);

  gnutls_certificate_set_dh_params(x509_cred, dh_params);
  gnutls_certificate_set_x509_key_file(x509_cred, x905CertFile.c_str(), x905KeyFile.c_str(), GNUTLS_X509_FMT_PEM);

  gnutls_init(&session, GNUTLS_SERVER);
  gnutls_set_default_priority(session);
  gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
  gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t)sock);

  FdManager::get()->registerFd(sock, sigc::mem_fun(this, &ServerConnection::sendReceive));

  state = CONNECT;

  gl_rwlock_unlock(stateLock);

  updateEvents();
}

}
}