Skype不通の原因?

/*
 * Function: SkypeUDPBehaviorDetect()
 *
 * Purpose: Detect the UDP behavior of the Skype client
 *
 * Comment: Packets look like this
 *          +-----------+-------------------+-----------+--------------+----------------+
 *          | 2 byte ID | one byte function | 4 byte IV | 4 byte crc32 | Crypted Payload|
 *          +-----------+-------------------+-----------+--------------+----------------+
 *
 *          1) When the client initiates a conversation with a server it will send a packet
 *          with an ID and a function of 0x02.
 *          2) The server will respond with the same ID and a different function.
 *          3) The client will then respond with the same ID and another function.
 *          4) The server will then respond with a different ID and a function of 0x02
 *
 * Arguments: None.
 *
 * Returns: 1 on detect
 *
 */