raknet.add_send_hook

function raknet.add_send_hook(callback: (packet: RakNetPacket) -> nil): ()

function

required

The callback function to register.

Due to the nature of RakNet, in order for this function to do anything, you need to enable it in the UI settings. Bans may occur from using this.

Example

This example prints the data of every packet sent.

raknet.add_send_hook(function(packet)
    print("ID:", packet.PacketId)
    print("Size:", packet.Size)
    print("Priority:", packet.Priority)
    print("Data (as buffer):", packet.AsBuffer)
    print("Data (as array):", packet.AsArray)
    print("Data (as string):", packet.AsString)
    print("Reliability:", packet.Reliability)
    print("Ordering Channel:", packet.OrderingChannel)
end)

Desync Example

This example is a widely known replication desync that registers a send hook that modifies ID_TIMESTAMP packets before they are sent. This example may be outdated as of 07/27/26

raknet.add_send_hook(function(packet)
    if packet.PacketId == 0x1B then
        local buf = packet.AsBuffer
        buffer.writeu32(buf, 1, 0xFFFFFFFF)

        packet:SetData(buf)
    end
end)

​Example

​Desync Example

Example

Desync Example