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-rw-r--r--source/Protocol/Protocol17x.cpp216
1 files changed, 216 insertions, 0 deletions
diff --git a/source/Protocol/Protocol17x.cpp b/source/Protocol/Protocol17x.cpp
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+++ b/source/Protocol/Protocol17x.cpp
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+
+// Protocol17x.cpp
+
+/*
+Implements the 1.7.x protocol classes:
+ - cProtocol172
+ - release 1.7.2 protocol (#4)
+(others may be added later in the future for the 1.7 release series)
+*/
+
+#include "Globals.h"
+#include "Protocol17x.h"
+#include "../ClientHandle.h"
+#include "../Root.h"
+#include "../Server.h"
+
+
+
+
+
+cProtocol172::cProtocol172(cClientHandle * a_Client, const AString & a_ServerAddress, UInt16 a_ServerPort, UInt32 a_State) :
+ super(a_Client),
+ m_ServerAddress(a_ServerAddress),
+ m_ServerPort(a_ServerPort),
+ m_State(a_State),
+ m_ReceivedData(32 KiB),
+ m_IsEncrypted(false)
+{
+}
+
+
+
+
+
+void cProtocol172::DataReceived(const char * a_Data, int a_Size)
+{
+ if (m_IsEncrypted)
+ {
+ byte Decrypted[512];
+ while (a_Size > 0)
+ {
+ int NumBytes = (a_Size > sizeof(Decrypted)) ? sizeof(Decrypted) : a_Size;
+ m_Decryptor.ProcessData(Decrypted, (byte *)a_Data, NumBytes);
+ AddReceivedData((const char *)Decrypted, NumBytes);
+ a_Size -= NumBytes;
+ a_Data += NumBytes;
+ }
+ }
+ else
+ {
+ AddReceivedData(a_Data, a_Size);
+ }
+}
+
+
+
+
+void cProtocol172::AddReceivedData(const char * a_Data, int a_Size)
+{
+ if (!m_ReceivedData.Write(a_Data, a_Size))
+ {
+ // Too much data in the incoming queue, report to caller:
+ m_Client->PacketBufferFull();
+ return;
+ }
+
+ // Handle all complete packets:
+ while (true)
+ {
+ UInt32 PacketLen;
+ if (!m_ReceivedData.ReadVarInt(PacketLen))
+ {
+ // Not enough data
+ return;
+ }
+ if (!m_ReceivedData.CanReadBytes(PacketLen))
+ {
+ // The full packet hasn't been received yet
+ return;
+ }
+ UInt32 PacketType;
+ UInt32 NumBytesRead = m_ReceivedData.GetReadableSpace();
+ if (!m_ReceivedData.ReadVarInt(PacketType))
+ {
+ // Not enough data
+ return;
+ }
+ NumBytesRead -= m_ReceivedData.GetReadableSpace();
+ HandlePacket(PacketType, PacketLen - NumBytesRead);
+ } // while (true)
+}
+
+
+
+
+void cProtocol172::HandlePacket(UInt32 a_PacketType, UInt32 a_RemainingBytes)
+{
+ switch (m_State)
+ {
+ case 1:
+ {
+ // Status
+ switch (a_PacketType)
+ {
+ case 0x00: HandlePacketStatusRequest(a_RemainingBytes); return;
+ }
+ break;
+ }
+
+ case 2:
+ {
+ // Login
+ break;
+ }
+
+ case 3:
+ {
+ // Game
+ break;
+ }
+ } // switch (m_State)
+
+ // Unknown packet type, report to the client:
+ m_Client->PacketUnknown(a_PacketType);
+ m_ReceivedData.SkipRead(a_RemainingBytes);
+ m_ReceivedData.CommitRead();
+}
+
+
+
+
+
+void cProtocol172::HandlePacketStatusRequest(UInt32 a_RemainingBytes)
+{
+ // No more bytes in this packet
+ ASSERT(a_RemainingBytes == 0);
+ m_ReceivedData.CommitRead();
+
+ // Send the response:
+ AString Response = "{\"version\":{\"name\":\"1.7.2\",\"protocol\":4},\"players\":{";
+ AppendPrintf(Response, "\"max\":%u,\"online\":%u,\"sample\":[]},",
+ cRoot::Get()->GetServer()->GetMaxPlayers(),
+ cRoot::Get()->GetServer()->GetNumPlayers()
+ );
+ AppendPrintf(Response, "\"description\":{\"text\":\"%s\"}",
+ cRoot::Get()->GetServer()->GetDescription().c_str()
+ );
+ Response.append("}");
+
+ cByteBuffer Packet(Response.size() + 10);
+ Packet.WriteVarInt(0x00); // Response packet
+ Packet.WriteVarUTF8String(Response);
+ WritePacket(Packet);
+}
+
+
+
+
+
+void cProtocol172::WritePacket(cByteBuffer & a_Packet)
+{
+ cCSLock Lock(m_CSPacket);
+ AString Pkt;
+ a_Packet.ReadAll(Pkt);
+ WriteVarInt(Pkt.size());
+ SendData(Pkt.data(), Pkt.size());
+ Flush();
+}
+
+
+
+
+
+void cProtocol172::SendData(const char * a_Data, int a_Size)
+{
+ m_DataToSend.append(a_Data, a_Size);
+}
+
+
+
+
+
+void cProtocol172::Flush(void)
+{
+ ASSERT(m_CSPacket.IsLockedByCurrentThread()); // Did all packets lock the CS properly?
+
+ if (m_DataToSend.empty())
+ {
+ LOGD("Flushing empty");
+ return;
+ }
+ const char * a_Data = m_DataToSend.data();
+ int a_Size = m_DataToSend.size();
+ if (m_IsEncrypted)
+ {
+ byte Encrypted[8192]; // Larger buffer, we may be sending lots of data (chunks)
+ while (a_Size > 0)
+ {
+ int NumBytes = (a_Size > sizeof(Encrypted)) ? sizeof(Encrypted) : a_Size;
+ m_Encryptor.ProcessData(Encrypted, (byte *)a_Data, NumBytes);
+ m_Client->SendData((const char *)Encrypted, NumBytes);
+ a_Size -= NumBytes;
+ a_Data += NumBytes;
+ }
+ }
+ else
+ {
+ m_Client->SendData(a_Data, a_Size);
+ }
+ m_DataToSend.clear();
+}
+
+
+
+
+