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/**
* Accessor methods used by a serial dispatcher to communicate with various
* message_t link formats over a serial port.
*
* @author Philip Levis
* @author Ben Greenstein
* @date August 7 2005
*/
interface SerialPacketInfo {
/**
* Get the offset into a message_t where the header information begins.
* @return Returns the offset.
*/
async command uint8_t offset();
/**
* Get the size of the datalink packet embedded in the message_t, in bytes.
* This is the sum of the payload (upperLen) and the size of the link header.
* @param msg A pointer to the message_t to interrogate. (unused)
* @param upperLen The size of the payload.
* @return Returns the size of the datalink packet.
*/
async command uint8_t dataLinkLength(message_t* msg, uint8_t upperLen);
/**
* Get the size of the payload (in bytes) given the size of the datalink
* packet (dataLinkLen) embedded in the message_t.
* @param msg A pointer to the message_t to interrogate. (unused)
* @param dataLinkLength The size of the datalink packet.
* @return Returns the size of the payload.
*/
async command uint8_t upperLength(message_t* msg, uint8_t dataLinkLen);
}
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