Package org.geysermc.mcprotocollib.network.packet

Interface PacketHeader

All Known Implementing Classes:
DefaultPacketHeader
public interface PacketHeader
The header of a protocol's packets.

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    getLengthSize()
    Gets the size of the header's length value.
    int
    getLengthSize(int length)
    Gets the size of the header's length value.
    boolean
    isLengthVariable()
    Gets whether the header's length value can vary in size.
    int
    readLength(io.netty.buffer.ByteBuf buf, PacketCodecHelper codecHelper, int available)
    Reads the length of a packet from the given input.
    int
    readPacketId(io.netty.buffer.ByteBuf buf, PacketCodecHelper codecHelper)
    Reads the ID of a packet from the given input.
    void
    writeLength(io.netty.buffer.ByteBuf buf, PacketCodecHelper codecHelper, int length)
    Writes the length of a packet to the given output.
    void
    writePacketId(io.netty.buffer.ByteBuf buf, PacketCodecHelper codecHelper, int packetId)
    Writes the ID of a packet to the given output.

  • Method Details

    • isLengthVariable

      boolean isLengthVariable()
      Gets whether the header's length value can vary in size.
      Returns:
      Whether the header's length value can vary in size.

    • getLengthSize

      int getLengthSize()
      Gets the size of the header's length value.
      Returns:
      The length value's size.

    • getLengthSize

      int getLengthSize(int length)
      Gets the size of the header's length value.
      Parameters:
      length - Length value to get the size of.
      Returns:
      The length value's size.

    • readLength

      int readLength(io.netty.buffer.ByteBuf buf, PacketCodecHelper codecHelper, int available)
      Reads the length of a packet from the given input.
      Parameters:
      buf - Buffer to read from.
      codecHelper - The codec helper.
      available - Number of packet bytes available after the length.
      Returns:
      The resulting packet length.

    • writeLength

      void writeLength(io.netty.buffer.ByteBuf buf, PacketCodecHelper codecHelper, int length)
      Writes the length of a packet to the given output.
      Parameters:
      buf - Buffer to write to.
      codecHelper - The codec helper.
      length - Length to write.

    • readPacketId

      int readPacketId(io.netty.buffer.ByteBuf buf, PacketCodecHelper codecHelper)
      Reads the ID of a packet from the given input.
      Parameters:
      buf - Buffer to read from.
      codecHelper - The codec helper.
      Returns:
      The resulting packet ID, or -1 if the packet should not be read yet.

    • writePacketId

      void writePacketId(io.netty.buffer.ByteBuf buf, PacketCodecHelper codecHelper, int packetId)
      Writes the ID of a packet to the given output.
      Parameters:
      buf - Buffer to write to.
      codecHelper - The codec helper.
      packetId - Packet ID to write.