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Diffstat (limited to 'doc')
-rw-r--r-- | doc/payload-expression.txt | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/doc/payload-expression.txt b/doc/payload-expression.txt index e1a10252..abaf52f0 100644 --- a/doc/payload-expression.txt +++ b/doc/payload-expression.txt @@ -151,6 +151,34 @@ MTU of path MTU discovery| integer (16 bit) |============================ +IGMP HEADER EXPRESSION +~~~~~~~~~~~~~~~~~~~~~~ +[verse] +*igmp* ['IGMP' 'header' 'field'] + +This expression refers to IGMP header fields. When using it in *inet*, +*bridge* or *netdev* families, it will cause an implicit dependency on IPv4 to +be created. To match on unusual cases like IGMP over IPv6, one has to add an +explicit *meta protocol ip6* match to the rule. + +.IGMP header expression +[options="header"] +|================== +|Keyword|Description| Type +|type| +IGMP type field | +igmp_type +|mrt| +IGMP maximum response time field | +integer (8 bit) +|checksum| +ICMP checksum field | +integer (16 bit) +|group| +Group address| +integer (32 bit) +|============================ + IPV6 HEADER EXPRESSION ~~~~~~~~~~~~~~~~~~~~~~ [verse] |