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/*
* 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 <fstream>
#include <sys/socket.h>
namespace Mad {
namespace Net {
bool ServerConnection::loadDHParams(const std::string &file) {
std::ifstream stream(file.c_str());
if(!stream.is_open())
return false;
std::string data, line;
while(!stream.eof()) {
std::getline(stream, line);
data += line + "\n";
}
stream.close();
gnutls_datum_t datum;
datum.data = new unsigned char[data.size()];
datum.size = data.size();
std::memcpy(datum.data, data.data(), data.size());
int ret = gnutls_dh_params_import_pkcs3(dh_params, &datum, GNUTLS_X509_FMT_PEM);
if(ret == 0)
gnutls_anon_set_server_dh_params(anoncred, dh_params);
delete [] datum.data;
return (ret == 0);
}
bool ServerConnection::listen(const IPAddress &address) {
const int kx_list[] = {GNUTLS_KX_ANON_DH, 0};
if(connected)
disconnect();
int listen_sock = socket(PF_INET, SOCK_STREAM, 0);
if(listen_sock < 0)
return false;
peer = new IPAddress(address);
if(bind(listen_sock, peer->getSockAddr(), peer->getSockAddrLength()) < 0) {
close(listen_sock);
delete peer;
return false;
}
if(::listen(listen_sock, 1024) < 0) {
close(listen_sock);
delete peer;
return false;
}
sock = accept(listen_sock, NULL, NULL);
if(sock < 0) {
close(listen_sock);
delete peer;
return false;
}
close(listen_sock);
connected = true;
gnutls_init(&session, GNUTLS_SERVER);
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();
return false;
}
return true;
}
void ServerConnection::disconnect() {
if(!connected)
return;
gnutls_bye(session, GNUTLS_SHUT_RDWR);
shutdown(sock, SHUT_RDWR);
close(sock);
gnutls_deinit(session);
delete peer;
connected = false;
}
bool ServerConnection::dataPending() {
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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