Hopefully this fixes the SteamAPI_ISteamGameServer_GetPublicIP function

dll/dll.cpp

@@ -136,7 +136,7 @@ Steam_Client *get_steam_clientserver_old()
 static bool steamclient_has_ipv6_functions_flag;
 bool steamclient_has_ipv6_functions()
 {
-    return steamclient_has_ipv6_functions_flag;
+    return steamclient_has_ipv6_functions_flag || get_steam_client()->gameserver_has_ipv6_functions;
 }
 
 static void *create_client_interface(const char *ver)

dll/flat.cpp

@@ -5843,13 +5843,14 @@ STEAMAPI_API SteamAPICall_t SteamAPI_ISteamGameServer_GetServerReputation( IStea
     return self->GetServerReputation();
 }
 
-STEAMAPI_API uint32 SteamAPI_ISteamGameServer_GetPublicIP( intptr_t instancePtr, void *instancePtr_possible )
+STEAMAPI_API void *SteamAPI_ISteamGameServer_GetPublicIP( intptr_t instancePtr, void *instancePtr_possible )
 {
-    //TODO: check if this actually works (ret value changed from uint32 to struct)
+    //abuse call convention rules to get this working.
     if (steamclient_has_ipv6_functions()) {
-        return ((ISteamGameServer012 *)instancePtr_possible)->GetPublicIP_old();
+        get_steam_client()->steam_gameserver->GetPublicIP_fix((SteamIPAddress_t *)instancePtr);
+        return (void *)instancePtr;
     } else {
-        return ((ISteamGameServer012 *)instancePtr)->GetPublicIP_old();
+        return (void *)((ISteamGameServer012 *)instancePtr)->GetPublicIP_old();
     }
 }
 

dll/steam_client.cpp

@@ -109,6 +109,8 @@ Steam_Client::Steam_Client()
     steam_gameserver_game_coordinator = new Steam_Game_Coordinator(settings_server, network, callback_results_server, callbacks_server, run_every_runcb);
     steam_masterserver_updater = new Steam_Masterserver_Updater(settings_server, network, callback_results_server, callbacks_server, run_every_runcb);
 
+    gameserver_has_ipv6_functions = false;
+
     last_cb_run = 0;
     PRINT_DEBUG("client init end\n");
 }
@@ -303,8 +305,10 @@ ISteamGameServer *Steam_Client::GetISteamGameServer( HSteamUser hSteamUser, HSte
     } else if (strcmp(pchVersion, "SteamGameServer012") == 0) {
         return (ISteamGameServer *)(void *)(ISteamGameServer012 *)steam_gameserver;
     } else if (strcmp(pchVersion, STEAMGAMESERVER_INTERFACE_VERSION) == 0) {
+        gameserver_has_ipv6_functions = true;
         return (ISteamGameServer *)(void *)(ISteamGameServer *)steam_gameserver;
     } else {
+        gameserver_has_ipv6_functions = true;
         return (ISteamGameServer *)(void *)(ISteamGameServer *)steam_gameserver;
     }
 

dll/steam_client.h

@@ -139,6 +139,8 @@ public:
     unsigned steam_pipe_counter = 1;
     std::map<HSteamPipe, enum Steam_Pipe> steam_pipes;
 
+    bool gameserver_has_ipv6_functions;
+
     Steam_Client();
     ~Steam_Client();
     	// Creates a communication pipe to the Steam client.

dll/steam_gameserver.cpp

@@ -559,6 +559,12 @@ SteamIPAddress_t Steam_GameServer::GetPublicIP()
     return ip;
 }
 
+void Steam_GameServer::GetPublicIP_fix(SteamIPAddress_t *out)
+{
+    PRINT_DEBUG("GetPublicIP_fix\n");
+    if (out) *out = GetPublicIP();
+}
+
 // These are in GameSocketShare mode, where instead of ISteamGameServer creating its own
 // socket to talk to the master server on, it lets the game use its socket to forward messages
 // back and forth. This prevents us from requiring server ops to open up yet another port

dll/steam_gameserver.h

@@ -278,6 +278,7 @@ public:
 	// connect to
 	uint32 GetPublicIP_old();
 	SteamIPAddress_t GetPublicIP();
+	void GetPublicIP_fix(SteamIPAddress_t *out);
 
 // These are in GameSocketShare mode, where instead of ISteamGameServer creating its own
 // socket to talk to the master server on, it lets the game use its socket to forward messages