NetAddress Socket::getsockname()
{
char buf[sizeof(sockaddr_in) + 1];
memset(buf, 0, sizeof(buf));
socklen_t len = sizeof(buf);
int ret = ::getsockname(fd(), (sockaddr*)buf, &len);
setStatus();
return NetAddress(buf, len);
}
NetListener::NetListener(uint16 port) {
NetworkDevice* nd = NetworkDevice::instance();
// Start the listener socket
Log::common()->print("Creating a listener ");
sock = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (sock == SOCKET_ERROR) {
Log::common()->printf("FAIL");
Log::common()->println(socketErrorCode());
return;
}
Log::common()->println("Ok");
const int T = true;
// Set reuse address so that a new server can start up soon after
// an old one has closed.
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
(const char*)&T, sizeof(T)) == SOCKET_ERROR) {
Log::common()->println("WARNING: Setting socket reuseaddr failed.");
Log::common()->println(socketErrorCode());
} else {
Log::common()->println("Set socket option reuseaddr.");
}
if (! nd->bind(sock, NetAddress(0, port))) {
Log::common()->printf("Unable to bind!\n");
nd->closesocket(sock);
sock = (SOCKET)SOCKET_ERROR;
return;
}
Log::common()->printf("Listening on port %5d ", port);
// listen is supposed to return 0 when there is no error.
// The 2nd argument is the number of connections to allow pending
// at any time.
int L = listen(sock, 100);
if (L == SOCKET_ERROR) {
Log::common()->println("FAIL");
Log::common()->println(socketErrorCode());
nd->closesocket(sock);
sock = (SOCKET)SOCKET_ERROR;
return;
}
Log::common()->println("Ok");
Log::common()->printf("Now listening on socket %d.\n\n", sock);
}
NetAddress Socket::getpeername()
{
char buf[sizeof(sockaddr_in) + 1];
memset(buf, 0, sizeof(buf));
socklen_t len = sizeof(buf);
int ret = ::getpeername(fd(), (sockaddr*)&buf, &len);
/// Fix a fatal bug
/// setStatus();
return NetAddress(buf, len);
}
ReliableConduitRef NetListener::waitForConnection() {
// The address of the connecting host
SOCKADDR_IN remote_addr;
int iAddrLen = sizeof(remote_addr);
if (nd->debugLog) {
nd->debugLog->println("Blocking in NetListener::waitForConnection().");
}
SOCKET sClient = accept(sock, (struct sockaddr*) &remote_addr,
(socklen_t*)&iAddrLen);
if (sClient == SOCKET_ERROR) {
if (nd->debugLog) {
nd->debugLog->println("Error in NetListener::acceptConnection.");
nd->debugLog->println(socketErrorCode());
}
nd->closesocket(sock);
return NULL;
}
if (nd->debugLog) {
nd->debugLog->printf("%s connected, transferred to socket %d.\n",
inet_ntoa(remote_addr.sin_addr), sClient);
}
#ifndef G3D_WIN32
return new ReliableConduit(nd, sClient,
NetAddress(htonl(remote_addr.sin_addr.s_addr),
ntohs(remote_addr.sin_port)));
#else
return new ReliableConduit(nd, sClient,
NetAddress(ntohl(remote_addr.sin_addr.S_un.S_addr),
ntohs(remote_addr.sin_port)));
#endif
}
LightweightConduit::LightweightConduit(
NetworkDevice* _nd,
uint16 port,
bool enableReceive,
bool enableBroadcast) : Conduit(_nd) {
if (nd->debugLog) {nd->debugLog->print("Creating a UDP socket ");}
sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (sock == SOCKET_ERROR) {
sock = 0;
if (nd->debugLog) {
nd->debugLog->println("FAIL");
nd->debugLog->println(socketErrorCode());
}
return;
}
if (nd->debugLog) {nd->debugLog->println("Ok");}
if (enableReceive) {
debugAssert(port != 0);
nd->bind(sock, NetAddress(0, port));
}
// Figuring out the MTU seems very complicated, so we just set it to 1000,
// which is likely to be safe. See IP_MTU for more information.
MTU = 1000;
increaseBufferSize(sock, nd->debugLog);
if (enableBroadcast) {
int TR = true;
if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST,
(const char*)&TR, sizeof(TR)) != 0) {
if (nd->debugLog) {
nd->debugLog->println("Call to setsockopt failed");
nd->debugLog->println(socketErrorCode());
}
nd->closesocket(sock);
return;
}
}
if (nd->debugLog) {
nd->debugLog->printf("Done creating UDP socket %d\n", sock);
}
alreadyReadMessage = false;
}
Server::Server(const ServerDescription& description, const Settings& settings) :
m_settings(settings),
m_description(description) {
const Array<uint32> ipArray = NetworkDevice::instance()->broadcastAddressArray();
m_broadcastAddressArray.resize(ipArray.size());
for (int i = 0; i < m_broadcastAddressArray.size(); ++i) {
m_broadcastAddressArray[i] = NetAddress(ipArray[i], m_settings.serverBroadcastPort);
}
m_net = LightweightConduit::create(m_settings.clientBroadcastPort, true, true);
debugAssert(m_settings.serverAdvertisementPeriod > 0);
sendAdvertisement();
}
void NetworkDevice::localHostAddresses(Array<NetAddress>& array) const {
array.resize(0);
char ac[256];
if (gethostname(ac, sizeof(ac)) == SOCKET_ERROR) {
Log::common()->printf("Error while getting local host name\n");
return;
}
struct hostent* phe = gethostbyname(ac);
if (phe == 0) {
Log::common()->printf("Error while getting local host address\n");
return;
}
for (int i = 0; (phe->h_addr_list[i] != 0); ++i) {
struct in_addr addr;
memcpy(&addr, phe->h_addr_list[i], sizeof(struct in_addr));
array.append(NetAddress(addr));
}
}
void runServer() {
NetworkDevice* nd = NetworkDevice::instance();
alwaysAssertM(nd->adapterArray().size() > 0, "No network adapters.");
Discovery::ServerDescription description;
description.applicationName = "My Game";
description.maxClients = 10;
description.serverName = "My Server (" + nd->localHostName() + ")";
description.applicationAddress =
NetAddress(nd->adapterArray()[0].ip, GAME_PORT);
Discovery::Server::Ref discoveryServer = Discovery::Server::create(description);
// DiscoverServer is a Widget, so in a GApp you can just call
// GApp::addWidget() instead of explicitly running the following
// loop.
debugPrintf("Running server (press any key to exit)\n");
while (! System::consoleKeyPressed()) {
discoveryServer->onNetwork();
System::sleep(1.0f / 30.0f);
}
}
bool NetworkDevice::init() {
debugAssert(! initialized);
logPrintf("Network Startup");
logPrintf("Starting WinSock networking.\n");
// G3D now initializes winsock through ENet
// WSADATA wsda;
// WSAStartup(MAKEWORD(G3D_WINSOCK_MAJOR_VERSION, G3D_WINSOCK_MINOR_VERSION), &wsda);
std::string hostname = "localhost";
{
char ac[128];
if (gethostname(ac, sizeof(ac)) == -1) {
logPrintf("Warning: Error while getting local host name\n");
} else {
hostname = gethostbyname(ac)->h_name;
}
}
EthernetAdapter a;
a.hostname = hostname;
a.name = "";
a.ip = NetAddress(hostname, 0).ip();
// TODO: Find subnet on Win32
a.subnet = 0x0000FFFF;
// TODO: Find broadcast on Win32
a.broadcast = 0xFFFFFFFF;
// TODO: find MAC on Win32
addAdapter(a);
std::string machine = localHostName();
std::string addr = NetAddress(machine, 0).ipString();
/*
logPrintf(
"Network:\n"
" Status: %s\n"
" Loaded winsock specification version %d (%d is "
"the highest available)\n"
" %d sockets available\n"
" Largest UDP datagram packet size is %d bytes\n\n",
wsda.szDescription,
wsda.szSystemStatus,
wsda.wVersion,
wsda.wHighVersion,
wsda.iMaxSockets,
wsda.iMaxUdpDg);
*/
// TODO: WSAIoctl for subnet and broadcast addresses
// http://msdn.microsoft.com/en-us/library/ms741621(VS.85).aspx
//
// TODO: SIO_GET_INTERFACE_LIST
initialized = true;
return true;
}
bool NetworkDevice::init(G3D::Log* _log) {
debugAssert(!initialized);
debugLog = _log;
#ifdef G3D_WIN32
if (debugLog) {
debugLog->section("Network Startup");
debugLog->println("Starting WinSock networking.\n");
}
WSADATA wsda;
WSAStartup(MAKEWORD(G3D_WINSOCK_MAJOR_VERSION, G3D_WINSOCK_MINOR_VERSION), &wsda);
if (debugLog) {
std::string machine = localHostName();
std::string addr = NetAddress(machine, 0).ipString();
debugLog->printf(
"Network:\n"
" localhost = %s (%s)\n"
" %s\n"
" Status: %s\n"
" Loaded winsock specification version %d (%d is "
"the highest available)\n"
" %d sockets available\n"
" Largest UDP datagram packet size is %d bytes\n\n",
machine.c_str(), addr.c_str(),
wsda.szDescription,
wsda.szSystemStatus,
wsda.wVersion,
wsda.wHighVersion,
wsda.iMaxSockets,
wsda.iMaxUdpDg);
}
#endif
if (debugLog) {debugLog->section("Testing Network");}
SOCKET sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (debugLog) {debugLog->print("Open Socket ");}
if (sock == SOCKET_ERROR) {
if (debugLog) {
debugLog->println("FAIL");
debugLog->println(socketErrorCode());
}
return false;
}
if (debugLog) { debugLog->println("Ok"); }
int TR = true;
int ret = setsockopt(sock, SOL_SOCKET, SO_BROADCAST,
(const char*)&TR, sizeof(TR));
if (debugLog) {debugLog->print("Enable UDP Broadcast ");}
if (ret != 0) {
if (debugLog) {
debugLog->println("FAIL");
debugLog->println(socketErrorCode());
}
return false;
}
if (debugLog) {debugLog->println("Ok");}
if (debugLog) {debugLog->print("Testing UDP Broadcast ");}
SOCKADDR_IN addr;
int32 x;
addr = NetAddress(0xFFFFFFFF, 23).addr;
ret = sendto(sock, (const char*)&x, sizeof(x), 0,
(struct sockaddr *) &addr, sizeof(addr));
if (ret == SOCKET_ERROR) {
if (debugLog) {
debugLog->println("FAIL");
debugLog->println(socketErrorCode());
}
return false;
}
if (debugLog) {debugLog->println("Ok");}
if (debugLog) {debugLog->section("");}
initialized = true;
return true;
}
NetAddress NetAddress::broadcastAddress(uint16 port) {
return NetAddress(NetworkDevice::instance()->broadcastAddressArray()[0], port);
}