Client-side Multicast API

• int McastListen (char *UrlName)
  A call to this function will initiate a join to a Multicast address The URLName is mapped into a Multicast Address using a hash function. A value of 1 is returned if the join was successful else a value of 0 is returned. Before calling this function the parameters for the MTP-2 web need to be set. A join can fail if the parameters are not acceptable or the multicast reply was not received from the Master node.
• int ReceiveMcastData(int Filefd)
  This function receives data from the multicast address and streams it to the file descriptor defined by Filefd. If the messages are sequenced out of order, they are buffered and streamed out to the file descriptor in order. If an error condition occurs the receive is aborted with an return value 0. If the write to a file descriptor fails, the code exits. On successfully receiving the whole file the function returns a value of 1.