eathena: add packets SMSG_SERVER_VERSION_RESPONSE 0x7531

and CMSG_SERVER_VERSION_REQUEST  0x7530

4 files changed, 52 insertions, 14 deletions

diff --git a/src/net/eathena/loginhandler.cpp b/src/net/eathena/loginhandler.cpp
index 763baeccd..3332091d1 100644
--- a/src/net/eathena/loginhandler.cpp
+++ b/src/net/eathena/loginhandler.cpp
@@ -27,6 +27,8 @@
 
 #include "gui/windows/logindialog.h"
 
+#include "net/serverfeatures.h"
+
 #include "net/eathena/messageout.h"
 #include "net/eathena/network.h"
 #include "net/eathena/protocol.h"
@@ -52,6 +54,7 @@ LoginHandler::LoginHandler() :
         SMSG_LOGIN_ERROR,
         SMSG_LOGIN_ERROR2,
         SMSG_CHAR_PASSWORD_RESPONSE,
+        SMSG_SERVER_VERSION_RESPONSE,
         0
     };
     handledMessages = _messages;
@@ -82,6 +85,10 @@ void LoginHandler::handleMessage(Net::MessageIn &msg)
             processLoginError2(msg);
             break;
 
+        case SMSG_SERVER_VERSION_RESPONSE:
+            processServerVersion(msg);
+            break;
+
         default:
             break;
     }
@@ -93,8 +100,15 @@ void LoginHandler::connect()
         return;
 
     mNetwork->connect(mServer);
-    if (client->getState() != STATE_LOGIN)
-        client->setState(STATE_LOGIN);
+    if (serverFeatures->haveServerVersion())
+    {
+        sendVersion();
+    }
+    else
+    {
+        if (client->getState() != STATE_LOGIN)
+            client->setState(STATE_LOGIN);
+    }
 }
 
 bool LoginHandler::isConnected() const
@@ -131,13 +145,6 @@ void LoginHandler::sendLoginRegister(const std::string &restrict username,
     outMsg.writeInt32(20, "client version");
     outMsg.writeString(username, 24, "login");
     outMsg.writeStringNoLog(password, 24, "password");
-
-    /*
-     * eAthena calls the last byte "client version 2", but it isn't used at
-     * at all. We're retasking it, as a bit mask:
-     *  0 - can handle the 0x63 "update host" packet
-     *  1 - defaults to the first char-server (instead of the last)
-     */
     outMsg.writeInt8(0x03, "client type");
 }
 
@@ -224,4 +231,26 @@ void LoginHandler::processUpdateHost2(Net::MessageIn &msg A_UNUSED)
 {
 }
 
+void LoginHandler::sendVersion() const
+{
+    createOutPacket(CMSG_SERVER_VERSION_REQUEST);
+    outMsg.writeInt32(CLIENT_PROTOCOL_VERSION, "protocol version");
+    outMsg.writeInt32(0, "unused");
+    outMsg.writeInt32(0, "unused");
+    outMsg.writeInt32(0, "unused");
+    outMsg.writeInt32(0, "unused");
+}
+
+void LoginHandler::processServerVersion(Net::MessageIn &msg)
+{
+    msg.readInt16("len");
+    msg.readInt32("unused");
+    serverVersion = msg.readInt32("server version");
+    if (serverVersion > 0)
+        logger->log("Evol2 server version: %d", serverVersion);
+    else
+        logger->log("Hercules without version");
+    client->setState(STATE_LOGIN);
+}
+
 }  // namespace EAthena
diff --git a/src/net/eathena/loginhandler.h b/src/net/eathena/loginhandler.h
index eda2c809a..8e30e908a 100644
--- a/src/net/eathena/loginhandler.h
+++ b/src/net/eathena/loginhandler.h
@@ -60,21 +60,21 @@ class LoginHandler final : public MessageHandler, public Ea::LoginHandler
                             const std::string &restrict newPassword)
                             const override final;
 
+        void sendVersion() const;
+
         ServerInfo *getCharServer() const override final A_WARN_UNUSED;
 
         static void processLoginError2(Net::MessageIn &msg);
 
         static void processUpdateHost2(Net::MessageIn &msg);
 
+        static void processServerVersion(Net::MessageIn &msg);
+
     private:
         void sendLoginRegister(const std::string &restrict username,
                                const std::string &restrict password,
                                const std::string &restrict email)
                                const override final;
-
-    // unused
-    void processServerVersion(Net::MessageIn &msg A_UNUSED)
-    { }
 };
 
 }  // namespace EAthena
diff --git a/src/net/eathena/network.cpp b/src/net/eathena/network.cpp
index ff4bfce14..f0f727462 100644
--- a/src/net/eathena/network.cpp
+++ b/src/net/eathena/network.cpp
@@ -27,6 +27,7 @@
 #include "net/eathena/messagehandler.h"
 #include "net/eathena/messagein.h"
 #include "net/eathena/packets.h"
+#include "net/eathena/protocol.h"
 
 #include "utils/delete2.h"
 
@@ -139,7 +140,11 @@ bool Network::messageReady()
     if (mInSize >= 2)
     {
         const int msgId = readWord(0);
-        if (msgId >= 0 && static_cast<unsigned int>(msgId)
+        if (msgId == SMSG_SERVER_VERSION_RESPONSE)
+        {
+            len = 10;
+        }
+        else if (msgId >= 0 && static_cast<unsigned int>(msgId)
             < packet_lengths_size)
         {
             len = packet_lengths[msgId];
diff --git a/src/net/eathena/protocol.h b/src/net/eathena/protocol.h
index 4328941be..4645389ff 100644
--- a/src/net/eathena/protocol.h
+++ b/src/net/eathena/protocol.h
@@ -26,6 +26,8 @@
 /*********************************
  * Packets from server to client *
  *********************************/
+#define SMSG_SERVER_VERSION_RESPONSE 0x7531
+
 #define SMSG_SERVER_PING             0x007f /**< Contains server tick */
 #define SMSG_CONNECTION_PROBLEM      0x0081
 #define SMSG_MAP_NOT_FOUND           0x0840
@@ -308,6 +310,8 @@
  *  Packets from client to server *
  **********************************/
 
+#define CMSG_SERVER_VERSION_REQUEST  0x7530
+
 #define CMSG_LOGIN_REGISTER          0x0064
 #define CMSG_NAME_REQUEST            0x088a