1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |C|P| reserved | THL |
+ |P|C| reserved | THL |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ETX |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Field definitions are as follows:
- * C: Congestion notification. If a node drops a CTP data frame, it MUST set the C field on the next data frame it transmits.
* P: Routing pull. The P bit allows nodes to request routing information from other nodes. If a node with a valid route hears a packet with the P bit set, it SHOULD transmit a routing frame in the near future.
+ * C: Congestion notification. If a node drops a CTP data frame, it MUST set the C field on the next data frame it transmits.
* THL: Time Has Lived. When a node generates a CTP data frame, it MUST set THL to 0. When a node receives a CTP data frame, it MUST increment the THL. If a node receives a THL of 255, it increments it to 0.
* ETX: The ETX routing metric of the single-hop sender. When a node transmits a CTP data frame, it MUST put the ETX value of its route through the single-hop destination in the ETX field. If a node receives a packet with a lower gradient than its own, then it MUST schedule a routing frame in the near future.
* origin: The originating address of the packet. A node forwarding a data frame MUST NOT modify the origin field.
1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |C|P| reserved | parent |
+ |P|C| reserved | parent |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| parent | ETX |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
The fields are as follows:
- * C: Congestion notification. If a node drops a CTP data frame, it MUST set the C field on the next routing frame it transmits.
* P: Same as data frame.
+ * C: Congestion notification. If a node drops a CTP data frame, it MUST set the C field on the next routing frame it transmits.
* parent: The node's current parent.
* metric: The node's current routing metric value.