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Commit 5a566e93 authored by dkg's avatar dkg
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align analysis of octets 8-11 with analysis of octets 6-7

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......@@ -395,11 +395,10 @@ In streaming DNS, octets 8 through 11 represent answer counts and
authority counts in normal DNS queries, or Prerequisite and Update
counts in DNS UPDATE. Standard DNS queries will set them both 0. DNS
UPDATE queries are likely to include some records in these sections,
so they won't be all zero, but as long as no more than 255
Prerequisite records and no more than 255 Update records are sent, at
least one octet will have value 0 (the high octet of the count of a
field where there are fewer than 255 records). But No HTTP client
sends a zero-valued octet in these positions.
so they won't be all zero, but as long as no more than 2570
Prerequisite records and no more than 2570 Update records are sent, at
least one octet will have value less than 0x0A. But No HTTP client
sends an octet less tan 0x0A in these positions.
octets 12 and 13
----------------
......@@ -409,7 +408,8 @@ RRs. When a DNS query is sent with EDNS(0), the OPT RR is accounted
for here. So this is often either 0x0000 or 0x0001. In a secure DNS
UPDATE {{RFC3007}}, the SIG(0) or TSIG record is also found in this
section, which could increase the values of these octets to 0x0002.
No HTTP client will send these low values at these positions.
No HTTP client will send octets with these low values at these
positions.
Combinations of octets
======================
......
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