Chunk Types
RFC 2960 defines the following list of chunk types.
Following this table each chunk and its parameters are defined. Please note the following color scheme:
- gray: chunk fields
- red: fixed parameters
- green/blue: optional/variable-length parameters that alternate colors
Value | Abbreviation | Description |
---|---|---|
0 | DATA | Payload data |
1 | INIT | Initiation |
2 | INIT ACK | initiation acknowledgement |
3 | SACK | Selective acknowledgement |
4 | HEARTBEAT | Heartbeat request |
5 | HEARTBEAT ACK | Heartbeat acknowledgement |
6 | ABORT | Abort |
7 | SHUTDOWN | Shutdown |
8 | SHUTDOWN ACK | Shutdown acknowledgement |
9 | ERROR | Operation error |
10 | COOKIE ECHO | State cookie |
11 | COOKIE ACK | Cookie acknowledgement |
12 | ECNE | Explicit congestion notification echo (reserved) |
13 | CWR | Congestion window reduced (reserved) |
14 | SHUTDOWN COMPLETE | Shutdown complete |
15-62 | N/A | Reserved by IETF |
63 | IETF-defined chunk extensions | |
64-126 | Reserved by IETF | |
127 | IETF-defined chunk extensions | |
128-190 | Reserved by IETF | |
191 | IETF-defined chunk extensions | |
192-254 | Reserved by IETF | |
255 | IETF-defined chunk extensions |
Read more about this topic: SCTP Packet Structure
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