ltm rule command DNSMSG header

iRule(1)					  BIG-IP TMSH Manual					     iRule(1)

DNSMSG::header
       Returns a field from the header of a dns_message.

SYNOPSIS
       DNSMSG::header DNS_MESSAGE ('rcode' | 'opcode' | 'id' | 'ra' | 'rd' | 'tc' | 'qr' | 'aa' | 'ad' | 'cd')

DESCRIPTION
       Takes a dns_message structure and field name, and returns the specified field value from the header.

       Syntax

       DNSMSG::header   [ rcode | opcode | id | ra | rd | tc | qr | aa | ad | cd ]

RETURN VALUE
       Returns a field from the header.

VALID DURING
       ANY_EVENT

EXAMPLES
	when CLIENT_ACCEPTED {
		set result [RESOLVER::name_lookup "/Common/r1" www.abc.com a]
		set rcode [DNSMSG::header $result rcode]
	}

HINTS
SEE ALSO
CHANGE LOG
       @BIGIP-15.1.0 --First introduced the command.

BIG-IP						      2020-06-23					     iRule(1)