Steam networking messages implementation.

dll/net.proto

@@ -125,6 +125,20 @@ message Networking_Sockets {
     bytes data = 5;
 }
 
+message Networking_Messages {
+    enum Types {
+        CONNECTION_NEW = 0;
+        CONNECTION_ACCEPT = 1;
+        CONNECTION_END = 2;
+        DATA = 3;
+    }
+
+    Types type = 1;
+    uint32 channel = 2;
+    uint32 id_from = 3;
+    bytes data = 5;
+}
+
 message Gameserver {
     uint64 id = 1;
     bytes game_description = 2;
@@ -212,6 +226,7 @@ message Common_Message {
         Network_Old network_old = 12;
         Networking_Sockets networking_sockets = 13;
         Steam_Messages steam_messages = 14;
+        Networking_Messages networking_messages = 15;
     }
 
     uint32 source_ip = 128;

dll/network.cpp

@@ -554,6 +554,11 @@ void Networking::do_callbacks_message(Common_Message *msg)
         PRINT_DEBUG("has_steam_messages\n");
         run_callbacks(CALLBACK_ID_STEAM_MESSAGES, msg);
     }
+
+    if (msg->has_networking_messages()) {
+        PRINT_DEBUG("has_networking_messages\n");
+        run_callbacks(CALLBACK_ID_NETWORKING_MESSAGES, msg);
+    }
 }
 
 bool Networking::handle_tcp(Common_Message *msg, struct TCP_Socket &socket)

dll/network.h

@@ -56,6 +56,7 @@ enum Callback_Ids {
     CALLBACK_ID_FRIEND_MESSAGES,
     CALLBACK_ID_NETWORKING_SOCKETS,
     CALLBACK_ID_STEAM_MESSAGES,
+    CALLBACK_ID_NETWORKING_MESSAGES,
 
     CALLBACK_IDS_MAX
 };

dll/steam_networking_messages.h

@@ -17,6 +17,22 @@
 
 #include "base.h"
 
+#define NETWORKING_MESSAGES_TIMEOUT 30.0
+
+struct Steam_Message_Connection {
+    SteamNetworkingIdentity remote_identity;
+    std::map<int, std::queue<std::string>> data;
+
+    std::list<int> channels;
+    bool accepted = false;
+    bool dead = false;
+
+    unsigned id;
+    unsigned remote_id = 0;
+
+    std::chrono::high_resolution_clock::time_point created = std::chrono::high_resolution_clock::now();
+};
+
 class Steam_Networking_Messages :
 public ISteamNetworkingMessages
 {
@@ -26,7 +42,13 @@ public ISteamNetworkingMessages
     class SteamCallBacks *callbacks;
     class RunEveryRunCB *run_every_runcb;
 
+    std::map<CSteamID, Steam_Message_Connection> connections;
+    std::list<Common_Message> incoming_data;
+
+    unsigned id_counter = 0;
+    std::chrono::steady_clock::time_point created;
 public:
+
 static void steam_callback(void *object, Common_Message *msg)
 {
     PRINT_DEBUG("steam_networking_messages_callback\n");
@@ -48,11 +70,14 @@ Steam_Networking_Messages(class Settings *settings, class Networking *network, c
     this->settings = settings;
     this->network = network;
     this->run_every_runcb = run_every_runcb;
+    this->network->setCallback(CALLBACK_ID_NETWORKING_MESSAGES, settings->get_local_steam_id(), &Steam_Networking_Messages::steam_callback, this);
     this->network->setCallback(CALLBACK_ID_USER_STATUS, settings->get_local_steam_id(), &Steam_Networking_Messages::steam_callback, this);
     this->run_every_runcb->add(&Steam_Networking_Messages::steam_run_every_runcb, this);
 
     this->callback_results = callback_results;
     this->callbacks = callbacks;
+
+    this->created = std::chrono::steady_clock::now();
 }
 
 ~Steam_Networking_Messages()
@@ -61,6 +86,45 @@ Steam_Networking_Messages(class Settings *settings, class Networking *network, c
     this->run_every_runcb->remove(&Steam_Networking_Messages::steam_run_every_runcb, this);
 }
 
+std::map<CSteamID, Steam_Message_Connection>::iterator find_or_create_message_connection(SteamNetworkingIdentity identityRemote, bool incoming, bool restartbroken)
+{
+    auto conn = connections.find(identityRemote.GetSteamID());
+    if (conn == connections.end() || (conn->second.dead && restartbroken)) {
+        ++id_counter;
+        struct Steam_Message_Connection con;
+        con.remote_identity = identityRemote;
+        con.id = id_counter;
+        connections[identityRemote.GetSteamID()] = con;
+
+        Common_Message msg;
+        msg.set_source_id(settings->get_local_steam_id().ConvertToUint64());
+        msg.set_dest_id(con.remote_identity.GetSteamID64());
+        msg.set_allocated_networking_messages(new Networking_Messages);
+        if (incoming) {
+            msg.mutable_networking_messages()->set_type(Networking_Messages::CONNECTION_ACCEPT);
+        } else {
+            msg.mutable_networking_messages()->set_type(Networking_Messages::CONNECTION_NEW);
+        }
+        msg.mutable_networking_messages()->set_channel(0);
+        msg.mutable_networking_messages()->set_id_from(con.id);
+        network->sendTo(&msg, true);
+
+        conn = connections.find(identityRemote.GetSteamID());
+
+        if (incoming) {
+            SteamNetworkingMessagesSessionRequest_t data;
+            data.m_identityRemote = con.remote_identity;
+            callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+        }
+    }
+
+    if (!incoming) {
+        conn->second.accepted = true;
+    }
+
+    return conn;
+}
+
 /// Sends a message to the specified host.  If we don't already have a session with that user,
 /// a session is implicitly created.  There might be some handshaking that needs to happen
 /// before we can actually begin sending message data.  If this handshaking fails and we can't
@@ -106,9 +170,59 @@ Steam_Networking_Messages(class Settings *settings, class Networking *network, c
 EResult SendMessageToUser( const SteamNetworkingIdentity &identityRemote, const void *pubData, uint32 cubData, int nSendFlags, int nRemoteChannel )
 {
     PRINT_DEBUG("Steam_Networking_Messages::SendMessageToUser\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    const SteamNetworkingIPAddr *ip = identityRemote.GetIPAddr();
+    bool reliable = false;
+    if (nSendFlags & k_nSteamNetworkingSend_Reliable) {
+        reliable = true;
+    }
+
+    bool restart_broken = false;
+    if (nSendFlags & k_nSteamNetworkingSend_AutoRestartBrokenSession) {
+        restart_broken = true;
+    }
+
+    if (identityRemote.m_eType == k_ESteamNetworkingIdentityType_SteamID) {
+        PRINT_DEBUG("Steam_Networking_Messages::SendMessageToUser %llu\n", identityRemote.GetSteamID64());
+        //steam id identity
+    } else if (ip) {
+        PRINT_DEBUG("Steam_Networking_Messages::SendMessageToUser %u:%u ipv4? %u\n", ip->GetIPv4(), ip->m_port, ip->IsIPv4());
+        //ip addr
+        return k_EResultNoConnection; //TODO
+    } else {
         return k_EResultNoConnection;
     }
 
+    auto conn = find_or_create_message_connection(identityRemote, false, restart_broken);
+    if (conn->second.dead) {
+        return k_EResultNoConnection;
+    }
+
+    Common_Message msg;
+    msg.set_source_id(settings->get_local_steam_id().ConvertToUint64());
+    msg.set_dest_id(conn->second.remote_identity.GetSteamID64());
+    msg.set_allocated_networking_messages(new Networking_Messages);
+    msg.mutable_networking_messages()->set_type(Networking_Messages::DATA);
+    msg.mutable_networking_messages()->set_channel(nRemoteChannel);
+    msg.mutable_networking_messages()->set_id_from(conn->second.id);
+    msg.mutable_networking_messages()->set_data(pubData, cubData);
+
+    network->sendTo(&msg, reliable);
+    return k_EResultOK;
+}
+
+static void free_steam_message_data(SteamNetworkingMessage_t *pMsg)
+{
+    free(pMsg->m_pData);
+    pMsg->m_pData = NULL;
+}
+
+static void delete_steam_message(SteamNetworkingMessage_t *pMsg)
+{
+    if (pMsg->m_pfnFreeData) pMsg->m_pfnFreeData(pMsg);
+    delete pMsg;
+}
+
 /// Reads the next message that has been sent from another user via SendMessageToUser() on the given channel.
 /// Returns number of messages returned into your list.  (0 if no message are available on that channel.)
 ///
@@ -116,7 +230,42 @@ EResult SendMessageToUser( const SteamNetworkingIdentity &identityRemote, const
 int ReceiveMessagesOnChannel( int nLocalChannel, SteamNetworkingMessage_t **ppOutMessages, int nMaxMessages )
 {
     PRINT_DEBUG("Steam_Networking_Messages::ReceiveMessagesOnChannel\n");
-    return 0;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    int message_counter = 0;
+
+    for (auto & conn : connections) {
+        auto chan = conn.second.data.find(nLocalChannel);
+        if (chan != conn.second.data.end()) {
+            while (!chan->second.empty() && message_counter <= nMaxMessages) {
+                SteamNetworkingMessage_t *pMsg = new SteamNetworkingMessage_t(); //TODO size is wrong
+                unsigned long size = chan->second.front().size();
+                pMsg->m_pData = malloc(size);
+                pMsg->m_cbSize = size;
+                memcpy(pMsg->m_pData, chan->second.front().data(), size);
+                pMsg->m_conn = conn.second.id;
+                pMsg->m_identityPeer = conn.second.remote_identity;
+                pMsg->m_nConnUserData = -1;
+                pMsg->m_usecTimeReceived = std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::steady_clock::now() - created).count();
+                //TODO: messagenumber?
+                // pMsg->m_nMessageNumber = connect_socket->second.packet_receive_counter;
+                // ++connect_socket->second.packet_receive_counter;
+
+                pMsg->m_pfnFreeData = &free_steam_message_data;
+                pMsg->m_pfnRelease = &delete_steam_message;
+                pMsg->m_nChannel = nLocalChannel;
+                ppOutMessages[message_counter] = pMsg;
+                ++message_counter;
+                chan->second.pop();
+            }
+        }
+
+        if (message_counter >= nMaxMessages) {
+            break;
+        }
+    }
+
+    PRINT_DEBUG("Steam_Networking_Messages::ReceiveMessagesOnChannel got %u\n", message_counter);
+    return message_counter;
 }
 
 /// AcceptSessionWithUser() should only be called in response to a SteamP2PSessionRequest_t callback
@@ -129,9 +278,16 @@ int ReceiveMessagesOnChannel( int nLocalChannel, SteamNetworkingMessage_t **ppOu
 bool AcceptSessionWithUser( const SteamNetworkingIdentity &identityRemote )
 {
     PRINT_DEBUG("Steam_Networking_Messages::AcceptSessionWithUser\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    auto conn = connections.find(identityRemote.GetSteamID());
+    if (conn == connections.end()) {
         return false;
     }
 
+    conn->second.accepted = true;
+    return true;
+}
+
 /// Call this when you're done talking to a user to immediately free up resources under-the-hood.
 /// If the remote user tries to send data to you again, another P2PSessionRequest_t callback will
 /// be posted.
@@ -140,9 +296,25 @@ bool AcceptSessionWithUser( const SteamNetworkingIdentity &identityRemote )
 bool CloseSessionWithUser( const SteamNetworkingIdentity &identityRemote )
 {
     PRINT_DEBUG("Steam_Networking_Messages::CloseSessionWithUser\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    auto conn = connections.find(identityRemote.GetSteamID());
+    if (conn == connections.end()) {
         return false;
     }
 
+    Common_Message msg;
+    msg.set_source_id(settings->get_local_steam_id().ConvertToUint64());
+    msg.set_dest_id(conn->second.remote_identity.GetSteamID64());
+    msg.set_allocated_networking_messages(new Networking_Messages);
+    msg.mutable_networking_messages()->set_type(Networking_Messages::CONNECTION_END);
+    msg.mutable_networking_messages()->set_channel(0);
+    msg.mutable_networking_messages()->set_id_from(conn->second.id);
+    network->sendTo(&msg, true);
+
+    connections.erase(conn);
+    return true;
+}
+
 /// Call this  when you're done talking to a user on a specific channel.  Once all
 /// open channels to a user have been closed, the open session to the user will be
 /// closed, and any new data from this user will trigger a SteamP2PSessionRequest_t
@@ -150,6 +322,7 @@ bool CloseSessionWithUser( const SteamNetworkingIdentity &identityRemote )
 bool CloseChannelWithUser( const SteamNetworkingIdentity &identityRemote, int nLocalChannel )
 {
     PRINT_DEBUG("Steam_Networking_Messages::CloseChannelWithUser\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
     return false;
 }
 
@@ -165,12 +338,62 @@ bool CloseChannelWithUser( const SteamNetworkingIdentity &identityRemote, int nL
 ESteamNetworkingConnectionState GetSessionConnectionInfo( const SteamNetworkingIdentity &identityRemote, SteamNetConnectionInfo_t *pConnectionInfo, SteamNetworkingQuickConnectionStatus *pQuickStatus )
 {
     PRINT_DEBUG("Steam_Networking_Messages::GetSessionConnectionInfo\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    auto conn = connections.find(identityRemote.GetSteamID());
+    if (conn == connections.end()) {
         return k_ESteamNetworkingConnectionState_None;
     }
 
+    if (pConnectionInfo) {
+        //TODO
+    }
+
+    if (pQuickStatus) {
+        //TODO
+    }
+
+    if (conn->second.remote_id == 0 || !conn->second.accepted) {
+        return k_ESteamNetworkingConnectionState_Connecting;
+    }
+
+    if (conn->second.dead) {
+        return k_ESteamNetworkingConnectionState_ClosedByPeer;
+    }
+
+    return k_ESteamNetworkingConnectionState_Connected;
+}
+
+void end_connection(CSteamID steam_id)
+{
+    auto conn = connections.find(steam_id);
+    if (conn != connections.end()) {
+        conn->second.dead = true;
+    }
+}
 
 void RunCallbacks()
 {
+    auto msg = std::begin(incoming_data);
+    while (msg != std::end(incoming_data)) {
+        CSteamID source_id((uint64)msg->source_id());
+
+        auto conn = connections.find(source_id);
+        if (conn != connections.end()) {
+            if (conn->second.remote_id == msg->networking_messages().id_from())
+                conn->second.data[msg->networking_messages().channel()].push(msg->networking_messages().data());
+        }
+
+        msg = incoming_data.erase(msg);
+    }
+
+    auto conn = std::begin(connections);
+    while (conn != std::end(connections)) {
+        if (!conn->second.accepted && check_timedout(conn->second.created, NETWORKING_MESSAGES_TIMEOUT)) {
+            conn = connections.erase(conn);
+        } else {
+            ++conn;
+        }
+    }
 }
 
 void Callback(Common_Message *msg)
@@ -181,7 +404,33 @@ void Callback(Common_Message *msg)
         }
 
         if (msg->low_level().type() == Low_Level::DISCONNECT) {
+            end_connection((uint64)msg->source_id());
+        }
+    }
 
+    if (msg->has_networking_messages()) {
+        PRINT_DEBUG("Steam_Networking_Messages: got network socket msg %u\n", msg->networking_messages().type());
+        if (msg->networking_messages().type() == Networking_Messages::CONNECTION_NEW) {
+            SteamNetworkingIdentity identity;
+            identity.SetSteamID64(msg->source_id());
+            auto conn = find_or_create_message_connection(identity, true, false);
+            conn->second.remote_id = msg->networking_messages().id_from();
+            conn->second.dead = false;
+        }
+
+        if (msg->networking_messages().type() == Networking_Messages::CONNECTION_ACCEPT) {
+            auto conn = connections.find((uint64)msg->source_id());
+            if (conn != connections.end()) {
+                conn->second.remote_id = msg->networking_messages().id_from();
+            }
+        }
+
+        if (msg->networking_messages().type() == Networking_Messages::CONNECTION_END) {
+            end_connection((uint64)msg->source_id());
+        }
+
+        if (msg->networking_messages().type() == Networking_Messages::DATA) {
+            incoming_data.push_back(Common_Message(*msg));
         }
     }
 }