Research notes

notes/packet_writeup.md

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+# General packet
+## Client to server spesific
+* Encode (encrypt) data
+  * use first byte as checksum
+    * every byte ^ 0xAA added together
+  * xor
+    * Server port ^ 0xCCCC
+    * Every other byte
+  * Lookup table (use byte as indexing value)
+
+
+## Shared
+* Can be internal packet
+
+# Internal packet
+|condition|name|bit length|type|notes|
+|---|---|---|---|---|
+||messageNumber|0x10|ushort||
+||reliability|0x04|uchar|Has to be over 5 (value > 5)|
+|reliability in (7, 10, 9)|orderingChannel|0x05|||
+|reliability in (7, 10, 9)|orderingIndex|0x10|ushort||
+||isSplitPacket|0x01|bool|Drop packet as we no longer support split packet?|
+|isSplitPacket == 0|dataBitLength|0x10|ushort||
+|isSplitPacket == 0|data|dataBitLength|uchar*||
+

notes/packetlist.txt

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+0x07    ID_PING
+0x08    ID_PING_OPEN_CONNECTIONS
+0x0B    ID_CONNECTION_REQUEST
+0x18    ID_OPEN_CONNECTION_REQUEST
+0x19    ID_OPEN_CONNECTION_REPLY
+0x1D    ID_CONNECTION_ATTEMPT_FAILED
+0x1F    ID_NO_FREE_INCOMING_CONNECTIONS
+0x24    ID_CONNECTION_BANNED
+0x25    ID_INVALID_PASSWORD
+0x27    ID_PONG
+0x37    ID_ADVERTISE_SYSTEM
+
+0x26    ID_MODIFIED_PACKET                  # default behavior (did not find the packet||could not handle because not found)

notes/reliabilityLayer.txt

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+0x07    UNRELIABLE_SEQUENCED
+0x0A    RELIABLE_SEQUENCED
+0x09    RELIABLE_ORDERED