2.2.2.17 TLV 17

The following are the constituents of TLV 17 of the WSHA SoH packet (section 2.2.2). All of the values MUST be present, unless otherwise noted. The values MUST be in this order. The M and R bits are defined in the Protocol Bindings for SoH [TNC-IF-TNCCSPBSoH] and are ignored by the WSHV upon receipt. All TLV 17 values are sent in network-byte order, which is big-endian, except for the Security_Updates_DurationSinceLastSynch field which is sent in machine-byte order and is little-endian.

0	1	2	3	4	5	6	7	8	9	1 0	1	2	3	4	5	6	7	8	9	2 0	1	2	3	4	5	6	7	8	9	3 0	1
A	B	TLV_Type (optional)														Length (optional)
Security_Updates_DurationSinceLastSynch (optional)
...

M (1 bit): The M bit MUST be set to zero.

R (1 bit): The R bit is reserved, and MUST be set to zero when sent and ignored on receipt.

TLV_Type (14 bits): A 14-bit unsigned integer that MUST be set to 7.

Length (2 bytes): A 16-bit unsigned integer in network-byte order that MUST indicate the length (8), in bytes, of the Security_Updates_DurationSinceLastSynch field.

Security_Updates_DurationSinceLastSynch (8 bytes): Eight bytes, as specified in section 2.2.10. Not used if an error is returned in the Security_Updates_ClientStatusCode (see section 2.2.9).

Note If Security_Updates_ClientStatusCode is an error, TLV 17 will not be present. For more information about Security_Updates_ClientStatusCode, see section 2.2.9