message API

• void initMessageQ()
  Initialize message Queue

• void freeMessageQ()
  Free message Queue resource

• struct _message copy_message(struct _message message)
  Return copied message

  message - Message to copy
  RETURN - Copied message

• int sendMessageToAllFollower(struct _message message)
  Send to all connected follower

  message - Message to send
  RETURN - 0 or -2(Failure)

• int sendMessageToFollower(struct _message message)
  Send to specific follwer

  message - Message to send
  RETURN - 0 or -2(Failure)

• int sendMessage(struct _message message, char send_type)
  Send Message

  message - Message to send
  send_type - Send type (MULTICAST, UNICAST)
  RETURN - 0 or -1(Failure)

• int messageLength(char *message)
  Return message length

  message - Message to send
  RETURN - length of message

• int isEmpty(int thing_id)
  Check if message queue is empty

  thing_id - Thing number
  RETURN - TRUE if empty, FALSE if not empty

• int isFull(int thing_id)
  Check if message queue is full

  thing_id - 사물의 번호
  RETURN - TRUE if full, FALSE if not full

• int push(struct _message message, int thing_id)
  Add message to message-queue of a thing

  message - Message to add
  thing_id - Thing number
  RETURN - Success-1

• int receiveMessage(int thing_id, struct _message *message)
  Receive message from other things

  thing_id - Thing number
  message - Message information
  RETURN - Success-1, Failure-0

• struct _message pop(int thing_id)
  Get the message from message-queue of thing

  thing_id - Thing number

• void printMessage(struct _message message)
  Print message to screen

  message - Message to send or receive

• void printMessagePath(struct _message_path mp)
  Print message forwarding path

  mp - Message forwarding path