+ * CC2420 header definition.
+ *
+ * An I-frame (interoperability frame) header has an extra network
+ * byte specified by 6LowPAN
+ *
+ * Length = length of the header + payload of the packet, minus the size
+ * of the length byte itself (1). This is what allows for variable
+ * length packets.
+ *
+ * FCF = Frame Control Field, defined in the 802.15.4 specs and the
+ * CC2420 datasheet.
+ *
+ * DSN = Data Sequence Number, a number incremented for each packet sent
+ * by a particular node. This is used in acknowledging that packet,
+ * and also filtering out duplicate packets.
+ *
+ * DestPan = The destination PAN (personal area network) ID, so your
+ * network can sit side by side with another TinyOS network and not
+ * interfere.
+ *
+ * Dest = The destination address of this packet. 0xFFFF is the broadcast
+ * address.
+ *
+ * Src = The local node ID that generated the message.
+ *
+ * Network = The TinyOS network ID, for interoperability with other types
+ * of 802.15.4 networks.
+ *
+ * Type = TinyOS AM type. When you create a new AMSenderC(AM_MYMSG),
+ * the AM_MYMSG definition is the type of packet.
+ *
+ * TOSH_DATA_LENGTH defaults to 28, it represents the maximum size of
+ * the payload portion of the packet, and is specified in the
+ * tos/types/message.h file.
+ *
+ * All of these fields will be filled in automatically by the radio stack
+ * when you attempt to send a message.