Support for client version 7.6

Tell me if there are parts which I should change.

- Not everything is tested yet, feel free to report bugs in 7.6
- the data send in between login opcode and account data might not be
correct, but I could not find any documents showing the right protocol
yet
- Hotkeys working

modules/game_hotkeys/hotkeys_manager.lua

@@ -375,15 +375,41 @@ function doKeyCombo(keyCombo)
       modules.game_console.setTextEditText(hotKey.value)
     end
   elseif hotKey.useType == HOTKEY_MANAGER_USE then
-    g_game.useInventoryItem(hotKey.itemId)
+    if g_game.getProtocolVersion() < 780 then
+      local item = g_game.findItemInContainers(hotKey.itemId, -1)
+      if item then
+        g_game.use(item)
+      end        
+    else
+      g_game.useInventoryItem(hotKey.itemId)
+    end
   elseif hotKey.useType == HOTKEY_MANAGER_USEONSELF then
-    g_game.useInventoryItemWith(hotKey.itemId, g_game.getLocalPlayer())
+    if g_game.getProtocolVersion() < 780 then
+      local item = g_game.findItemInContainers(hotKey.itemId, -1)
+      if item then
+        g_game.useWith(item, g_game.getLocalPlayer())
+      end        
+    else
+      g_game.useInventoryItemWith(hotKey.itemId, g_game.getLocalPlayer())
+    end
   elseif hotKey.useType == HOTKEY_MANAGER_USEONTARGET then
     local attackingCreature = g_game.getAttackingCreature()
     if not attackingCreature then return end
-    g_game.useInventoryItemWith(hotKey.itemId, attackingCreature)
+    if g_game.getProtocolVersion() < 780 then
+      local item = g_game.findItemInContainers(hotKey.itemId, -1)
+      if item then
+        g_game.useWith(item, attackingCreature)
+      end        
+    else
+      g_game.useInventoryItemWith(hotKey.itemId, attackingCreature)
+    end
   elseif hotKey.useType == HOTKEY_MANAGER_USEWITH then
     local item = Item.create(hotKey.itemId)
+    if g_game.getProtocolVersion() < 780 then
+      local tmpItem = g_game.findItemInContainers(hotKey.itemId, -1)
+      if not tmpItem then return true end     
+      item = tmpItem
+    end
     modules.game_interface.startUseWith(item)
   end
 end

modules/gamelib/game.lua

@@ -34,11 +34,11 @@ end
 
 function g_game.getSupportedClients()
   return {
-    810, 811, 840, 842, 850, 853, 854,
-    860, 861, 862, 870, 910, 940, 944,
-    953, 954, 960, 961, 963, 970, 980,
-    981, 982, 983, 984, 985, 986, 1001,
-    1002, 1010
+    760, 810, 811, 840, 842, 850, 853, 
+    854, 860, 861, 862, 870, 910, 940, 
+    944, 953, 954, 960, 961, 963, 970,
+    980, 981, 982, 983, 984, 985, 986, 
+    1001, 1002, 1010
   }
 end
 

modules/gamelib/protocol.lua

@@ -188,5 +188,9 @@ ClientOpcodes = {
     ClientMarketCreate                  = 246, -- 944
     ClientMarketCancel                  = 247, -- 944
     ClientMarketAccept                  = 248, -- 944
-    ClientAnswerModalDialog             = 249 -- 960
+    ClientAnswerModalDialog             = 249, -- 960
+    
+    -- 760
+    ClientEnterAccount760               = 513,
+    ClientEnterGame760                  = 522
 }

modules/gamelib/protocollogin.lua

@@ -27,9 +27,13 @@ end
 
 function ProtocolLogin:sendLoginPacket()
   local msg = OutputMessage.create()
-
-  msg:addU8(ClientOpcodes.ClientEnterAccount)
-  msg:addU16(g_game.getOs())
+  if g_game.getProtocolVersion() == 760 then
+    msg:addU16(ClientOpcodes.ClientEnterAccount760)
+  else
+    msg:addU8(ClientOpcodes.ClientEnterAccount)
+    msg:addU16(g_game.getOs())
+  end
+  
   msg:addU16(g_game.getProtocolVersion())
 
   if g_game.getProtocolVersion() >= 971 then
@@ -49,14 +53,16 @@ function ProtocolLogin:sendLoginPacket()
    -- first RSA byte must be 0
   msg:addU8(0)
 
-  -- xtea key
-  self:generateXteaKey()
-  local xteaKey = self:getXteaKey()
-  msg:addU32(xteaKey[1])
-  msg:addU32(xteaKey[2])
-  msg:addU32(xteaKey[3])
-  msg:addU32(xteaKey[4])
-
+  if g_game.getProtocolVersion() >= 800 then
+    -- xtea key
+    self:generateXteaKey()
+    local xteaKey = self:getXteaKey()
+    msg:addU32(xteaKey[1])
+    msg:addU32(xteaKey[2])
+    msg:addU32(xteaKey[3])
+    msg:addU32(xteaKey[4])
+  end
+  
   if g_game.getFeature(GameAccountNames) then
     msg:addString(self.accountName)
   else
@@ -73,14 +79,18 @@ function ProtocolLogin:sendLoginPacket()
   local paddingBytes = g_crypt.rsaGetSize() - (msg:getMessageSize() - offset)
   assert(paddingBytes >= 0)
   msg:addPaddingBytes(paddingBytes, 0)
-  msg:encryptRsa()
-
+  if g_game.getProtocolVersion() >= 800 then
+    msg:encryptRsa()
+  end
+  
   if g_game.getFeature(GameProtocolChecksum) then
     self:enableChecksum()
   end
 
   self:send(msg)
-  self:enableXteaEncryption()
+  if g_game.getProtocolVersion() >= 800 then
+    self:enableXteaEncryption()
+  end
   self:recv()
 end