diff options
| author | Florian Westphal <fw@strlen.de> | 2019-07-21 12:43:05 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-07-25 11:20:57 +0200 |
| commit | 25a0de69ea6874c992b703125c6354b006eb6ed1 (patch) | |
| tree | d2086b15d65ca0415c07f5705a515f59ebd51b71 /doc/primary-expression.txt | |
| parent | 1ee7c597b69d8ea0c878fc0c7d8b40f9dc32d569 (diff) | |
doc: fib: explain example in more detail
As noted by Felix Dreissig, fib documentation is quite terse, so explain
the 'saddr . iif' example with a few more words.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1220
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'doc/primary-expression.txt')
| -rw-r--r-- | doc/primary-expression.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/primary-expression.txt b/doc/primary-expression.txt index 34bcf2d3..fc17a02c 100644 --- a/doc/primary-expression.txt +++ b/doc/primary-expression.txt @@ -280,6 +280,12 @@ If no route was found for the source address/input interface combination, the ou In case the input interface is specified as part of the input key, the output interface index is always the same as the input interface index or zero. If only 'saddr oif' is given, then oif can be any interface index or zero. +In this example, 'saddr . iif' lookups up routing information based on the source address and the input interface. +oif picks the output interface index from the routing information. +If no route was found for the source address/input interface combination, the output interface index is zero. +In case the input interface is specified as part of the input key, the output interface index is always the same as the input interface index or zero. +If only 'saddr oif' is given, then oif can be any interface index or zero. + # drop packets to address not configured on ininterface filter prerouting fib daddr . iif type != { local, broadcast, multicast } drop |