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Packets
header
| Header | Article | Type | Name | Description |
| 0x00 | - | <-> | HandShake | Server handshake |
| 0x17 | - | C2S | QueryStatusReq | Query status request |
| 0x19 | - | C2S | PingLoadInfo | Client loading progress |
| 0x2C | - | S2C | MasteryInfo | All mastery information |
| 0x4C | - | S2C | - | Game announcement |
| 0x58 | - | C2S | StartGame | The client is ready to start the game |
| 0x5A | - | S2C | SynchVersion | An initial packet containing structs and what not, real purpose not defined yet |
| 0x64 | - | C2S | ClientReady | Client ready to continue |
| 0x65 | - | S2C | LoadHero | The hero info |
| 0x66 | - | S2C | LoadName | The summoners info |
| 0x67 | - | S2C | LoadScreenInfo | The loading screen information |
| 0x67 | - | S2C | MoveAns | The movement answer packet with the adjusted path |
| 0x78 | page | C2S | MoveReq | The movement request packet with the complete path |
| 0x7D | - | C2S | MoveConfirm | Confirmation of the MoveAns packet |
| 0x8F | - | S2C | QueryStatusAns | Query status answer |
| 0x9A | - | S2C | SendGameNumber | Send game number and summoners name |
| 0x9F | - | S2C | PingLoadInfo | Loading progress for a player |
| 0xA6 | - | C2S | GameNumberReq | Request game number and summoners name |
| 0xC9 | - | C2S | SynchVersion | Client version and some other client information |
| 0xFF | - | S2C | Batch | Batch packet |
List updated for client 0.0.0.142 A list of headers can also been found in common.h
All packets in LoL start with a common header. This header is 5 bytes in size and has the following layout:
| Type | Name | Description |
| uint8 | cmd | denotes the type (id) of the packet. |
| uint32 | netId | Id of the ingame-object to modify. Every object has an unique id which is used to refer to it. |
The size of normal packets is either constant/depending on the packet type or given within the packet.
Batch packets always have first byte to 0xFF
| Type | Name | Description |
| uint8 | cmd | always 0xFF |
| uint8 | packetNo | The total amount of packets this batch contains |
| uint8 | firstSize | The size of the first packet |
See batch packets body for parsing the rest of the batch
The header is then followed by packet data with its size depending on the packet type. The channel to send the packet from also depends on its type. Note that batch packets are different, but not yet fully understood.
The rest of the batch is parsed differently. After the firstSize packet:
| Type | Name | Description |
| uint8 | lengthAndFlags | This contains the length (retrieve it by shift right 2) and 2 flags |
| uint8 | unk1 | If first bit of lengthAndFlags is 0, else this byte is not present |
| uint8 | unk2 | If second bit of lengthAndFlags is 0, else this byte is not present |
| uint32 | unkt2 | If second bit of lengthAndFlags is 1, else these bytes are not present |
| uint8 | length | If lengthAndFlags>>2 == 0x3F then the real length is this byte, else this byte is not present |
| uint8 | body[lengthAndFlags>>2] | the body of the packet |
Repeat this until you have parsed packetNo times (but always check for overflow)
…to be continued.