Add a rule keyword, dns.opcode to match on the opcode flag
found in the DNS request and response headers.
Only exact matches are allowed with negation.
Examples:
- dns.opcode:4;
- dns.opcode:!1;
This changeset makes changes to the TX logging path. Since the txn
is passed to the TX logger, the TX can be used directly instead of
through the TX id.
Also, when requesting the query, if the request doesn't exist,
return the query from the response. This makes it behave
more like C implementation.
Redmine issue:
https://redmine.openinfosecfoundation.org/issues/2730
Also remove the now useless 'state' argument from the SetTxDetectState
calls. For those app-layer parsers that use a state == tx approach,
the state pointer is passed as tx.
Update app-layer parsers to remove the unused call and update the
modified call.
Avoid looping in transaction output.
Update app-layer API to store the bits in one step
and retrieve the bits in a single step as well.
Update users of the API.
As the DNS probe just uses the query portion of a response, don't
require there to be as many bytes as specified in the TCP DNS
header. This can occur in large responses where probe is called
without all the data.
Fixes the cases where the app proto is recorded as failed.
Fixes issue:
https://redmine.openinfosecfoundation.org/issues/2169
Fix handling of TXT records when there are multiple strings
in a single TXT record. For now, conform to the C implementation
where an answer record is created for each string in a single
txt record.
Also removes the data_len field from the answer entry. In Rust,
the length is available from actual data, which after decoding
may actually be different than the encoded data length, so just
use the length from the actual data.