UDP Option Kind Numbers
Registration Procedure(s)
- Standards Action or IESG Approval
Reference
- RFC 9868: Transport Options for UDP
Note
Codepoints 0-7 MUST be supported on any implementation supporting UDP Options. All others are supported at the discretion of each implementation.
Available Formats
| Kind | Length | Meaning | Reference |
|---|---|---|---|
| 0 | - | End of Options List (EOL) | RFC 9868 |
| 1 | - | No Operation (NOP) | RFC 9868 |
| 2 | 6 | Additional Payload Checksum (APC) | RFC 9868 |
| 3 | 10/12 | Fragmentation (FRAG) | RFC 9868 |
| 4 | 4 | Maximum Datagram Size (MDS) | RFC 9868 |
| 5 | 5 | Maximum Reassembled Datagram Size (MRDS) | RFC 9868 |
| 6 | 6 | Request (REQ) | RFC 9868 |
| 7 | 6 | Response (RES) | RFC 9868 |
| 8 | 10 | Timestamp (TIME) | RFC 9868 |
| 9 | (varies) | RESERVED for Authentication (AUTH) | RFC 9868; draft-touch-tsvwg-udp-auth-opt-00 |
| 10-126 | (varies) | Unassigned | |
| 127 | (varies) | RFC 3692-style experiments (EXP) | RFC 9868 |
| 128-191 | Reserved | RFC 9868 | |
| 192 | (varies) | Reserved for UNSAFE Compression (UCMP) | RFC 9868 |
| 193 | (varies) | Reserved for UNSAFE Encryption (UENC) | RFC 9868 |
| 194-253 | Unassigned - UNSAFE | ||
| 254 | (varies) | RFC 3692-style UNSAFE experiments (UEXP) | RFC 9868 |
| 255 | Reserved - UNSAFE | RFC 9868 |
TCP/UDP Experimental Option Experiment Identifiers (TCP/UDP ExIDs)
Reference
Note
See TCP/UDP Experimental Option Experiment Identifiers (TCP/UDP ExIDs).