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Server.cpp
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Server.cpp
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#include "Server.h"
#include<iostream>
#include <cassert>
#include <thread>
void Server::run(uint16 nPort){
sockets = SteamNetworkingSockets();
SteamNetworkingIPAddr serverLocalAddress;
serverLocalAddress.Clear();
serverLocalAddress.m_port = nPort;
SteamNetworkingConfigValue_t opt;
opt.SetPtr(k_ESteamNetworkingConfig_Callback_ConnectionStatusChanged, (void*)connectionStatusChangedCallback);
listenSocket = sockets->CreateListenSocketIP(serverLocalAddress, 1, &opt);
if(listenSocket == k_HSteamListenSocket_Invalid)
{
std::cout << "FAILED TO CREATE LISTEN SOCKET ON PORT: " << nPort << std::endl;
return;
}
pollGroup = sockets->CreatePollGroup();
if(pollGroup == k_HSteamNetPollGroup_Invalid)
{
std::cout << "FAILED TO LISTEN TO POLL GROUP ON PORT: " << nPort << std::endl;
return;
}
std::cout <<"Listening on port: " << nPort << std::endl;
bool active = true;
while(true)
{
pollIncomingMessages();
pollConnectionStateChanges();
std::this_thread::sleep_for( std::chrono::milliseconds( 10 ) );
active = false;
}
std::cout << "Closing Connections" << std::endl;
for (auto client : clientMap)
{
std::cout << client.first << " Server is shutting down..." << std::endl;
sockets->CloseConnection(client.first, 0, "Server Shutdown", true);
}
clientMap.clear();
sockets->CloseListenSocket(listenSocket);
listenSocket = k_HSteamListenSocket_Invalid;
sockets->DestroyPollGroup(pollGroup);
pollGroup = k_HSteamNetPollGroup_Invalid;
}
void Server::sendStringToClient(HSteamNetConnection conn, const char *str)
{
sockets->SendMessageToConnection(conn, str, (uint32)strlen(str), k_nSteamNetworkingSend_Reliable, nullptr);
}
void Server::sendStringToAll(const char *str, HSteamNetConnection except = k_HSteamNetConnection_Invalid)
{
for (auto &c: clientMap)
{
if(c.first != except)
{
sendStringToClient(c.first, str);
}
}
}
void Server::pollIncomingMessages()
{
char temp[1024];
while(active)
{
ISteamNetworkingMessage *incomingMsg = nullptr;
int numMsgs = sockets->ReceiveMessagesOnPollGroup(pollGroup, &incomingMsg, 1);
if(numMsgs == 0){
incomingMsg->Release();
return;
}
if(numMsgs < 0){
std::cout << "Fatal Error checking recived messages on poll group" << std::endl;
}
// parse message data
auto client = clientMap.find(incomingMsg->m_conn);
assert(client != clientMap.end());
std::string cmd;
cmd.assign((const char *) incomingMsg->m_pData, incomingMsg->m_cbSize);
const char *message = cmd.c_str();
incomingMsg->Release();
//known commands
if(strncmp(message, "/name", 5)==0)
{
const char *name = message+5;
while(isspace(*name)){++name;}
sprintf(temp, "%s is now %s", client->second.c_str(), name);
sendStringToAll(temp, client->first);
sprintf(temp, "You are now %s", name);
sendStringToClient(client->first, temp);
setClientName(client->first, name);
}
else
{
sprintf(temp, "%s: %s", client->second.c_str(), message);
sendStringToAll(temp, client->first);
}
return;
}
}
void Server::setClientName(HSteamNetConnection connection, const char *name)
{
clientMap[connection] = name;
sockets->SetConnectionName(connection, name);
}
void Server::onConnectionStatusChanged(SteamNetConnectionStatusChangedCallback_t *info)
{
char temp[1024];
switch(info->m_info.m_eState)
{
case k_ESteamNetworkingConnectionState_ClosedByPeer:
case k_ESteamNetworkingConnectionState_ProblemDetectedLocally:
{
if(info->m_eOldState == k_ESteamNetworkingConnectionState_Connected)
{
auto client = clientMap.find(info->m_hConn);
assert(client!=clientMap.end());
const char *debugLogAction;
if(info->m_info.m_eState == k_ESteamNetworkingConnectionState_ProblemDetectedLocally)
{
debugLogAction = "Problem detected locally";
sprintf(temp, "User %s lost connection (%s)", client->second.c_str(), info->m_info.m_szEndDebug);
}
else
{
debugLogAction = "Closed by peer";
sprintf(temp, "%s left the chat", client->second.c_str());
}
printf("debug action: %s, message: %s\n", debugLogAction, temp);
clientMap.erase(client);
sendStringToAll(temp);
}
else
{
assert( info->m_eOldState == k_ESteamNetworkingConnectionState_Connecting );
}
sockets->CloseConnection(info->m_hConn, 0, nullptr, false);
break;
}
case k_ESteamNetworkingConnectionState_Connecting:
{
assert(clientMap.find(info->m_hConn) == clientMap.end());
printf("Conneciton request from %s", info->m_info.m_szConnectionDescription);
if(sockets->AcceptConnection(info->m_hConn) != k_EResultOK)
{
sockets->CloseConnection(info->m_hConn, 0, nullptr, false);
printf("Connection closed before it could be accepted");
break;
}
if(!sockets->SetConnectionPollGroup(info->m_hConn, pollGroup))
{
sockets->CloseConnection(info->m_hConn, 0, nullptr, false);
printf("Failed to set connection poll group");
break;
}
// Temporary Solution. We'll generate a random name just like they do it in the
// Valve example that I'm using to learn this stuff for real.....
// Copy Paste the stuff from there.... :(() don't like doing this)
char name[ 64 ];
sprintf( name, "BraveWarrior%d", 10000 + ( rand() % 100000 ) );
sprintf( temp, "Welcome, stranger. Thou art known to us for now as '%s'; upon thine command '/nick' we shall know thee otherwise.", name );
sendStringToClient( info->m_hConn, temp );
if ( clientMap.empty() )
{
sendStringToClient( info->m_hConn, "Thou art utterly alone." );
}
else
{
sprintf( temp, "%d companions greet you:", (int)clientMap.size() );
for ( auto &c: clientMap )
{
sendStringToClient( info->m_hConn, c.second.c_str() );
}
}
sprintf( temp, "Hark! A stranger hath joined this merry host. For now we shall call them '%s'", name );
sendStringToAll( temp, info->m_hConn );
clientMap[ info->m_hConn ];
setClientName( info->m_hConn, name );
break;
}
default:
break;
}
}