MapleStory Private Server Wiki

A packet handler, as the name suggests, handles a packet with a specific header from the client to the server.

A source contains a large number of packet handlers as they are responsible for the role of the server of interacting with the game clients, each responding to a particular action of the player with triggered the packet to be sent by the game client.

A packet handler may

  • alter the database
  • send another packet back to the player
  • send multiple packets to other players

depending on the action of the player.