Ip Header Matches - Network Critical SmartNA-X User Manual

192 | IPP Module Preset Matches and Transforms | SmartNA-X 1G/10G Modular

IP header matches

The following Matches can be used to match IPv4 and IPv6 headers.
The following preset matches test the length of the IPv4 header and check the IPv4 version is indeed 4. Defined matches
on later parts of the packet assume it is 5 words long. No matches are provided for cases where the header has Options.
Table 9: IPv4 header matches
Match name
IPv4-IHL=5
t-IPv4-IHL=5
tt-IPv4-IHL=5
Table 10: IPv4 header protocol matches
Match name
IPv4-protocol-ICMP
IPv4-protocol-TCP
IPv4-protocol-UDP
IPv4-protocol-GRE
t-IPv4-protocol-TCP
tt-IPv4-protocol-TCP
t-IPv4-protocol-UDP
tt-IPv4-protocol-UDP
t-IPv4-protocol-GRE
tt-IPv4-protocol-GRE
The following matches check the IP version is 6.
Table 11: IPv6 header matches
Match name
Version-IPv6
t-Version-IPv6
Match definition (start bit, width, value)
112, 8, 69
144, 8, 69
176, 8, 69
Match definition (start bit, width, value)
184, 8, 1
184, 8, 6
184, 8, 17
184, 8, 47
216, 8, 6
248, 8, 6
216, 8, 17
248, 8, 17
216, 8, 47
248, 8, 47
Match definition (start bit, width, value)
112, 4, 6
144, 4, 6
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SmartNA-X 1G/10G User Guide 1.4 2015 Network Critical Solutions Limited