Query regarding the LSB encoding in TCP Profile
2013-05-23 02:07:34 GMT
Please clarify me about the inconsistency LSB encoding description in seq_7, rnd_1 and rnd_8.
In RFC 6846, page 43, under TCP Sequence Number, it specifies offset_param p = 2^(k-1)-1.”
In RFC 6846, page 44, under TCP Acknowledgment Number, it specifies offset_param p = 2^(k-2)-1.”
However, in the formal notation Section 8.2 in RFC 6846,
1. For seq_7, ack_number =:= lsb(16, 32767) => 2^(16-2)-1=16383 != 32767
2. For rnd_1, seq_number =:= lsb(18, 65535) => 2^(18-1)-1=131071 != 65535
3. For rnd_8, seq_number =:= lsb(16, 65535) => 2^(16-1)-1=32767 != 65535
I’ve read the email discussion about this and the conclusion seems to align the formal notation in 8.2.
Nevertheless, if we inspect the seq_number in rnd_8,
seq_number =:= lsb(16, 65535).
The notation specifies the interpretation interval for seq_number is 2^16=65536 with offset_param=65535.
To my understanding, it means seq_number is NEVER interpreted as increasing!!
Is this desirable property for rnd_8?
How come similar property is not shown in another Format 8 packet type seq_8?
Please clarify me and thanks for your support.
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