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[nft,1/2] doc: nft.8: Mention wildcard interface matching

Message ID 20200206113828.7306-1-phil@nwl.cc
State Changes Requested
Delegated to: Pablo Neira
Headers show
Series [nft,1/2] doc: nft.8: Mention wildcard interface matching | expand

Commit Message

Phil Sutter Feb. 6, 2020, 11:38 a.m. UTC 
Special meaning of asterisk in interface names wasn't described
anywhere.

Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 doc/primary-expression.txt | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/doc/primary-expression.txt b/doc/primary-expression.txt
index 94eccc20241a2..b15df015e5484 100644
--- a/doc/primary-expression.txt
+++ b/doc/primary-expression.txt
@@ -36,6 +36,13 @@  add such a rule, it will stop matching if the interface gets renamed and it
 will match again in case interface gets deleted and later a new interface
 with the same name is created.
 
+Like with iptables, wildcard matching on interface name prefixes is available for
+*iifname* and *oifname* matches by appending an asterisk (*) character. Note
+however that unlike iptables, nftables does not accept interface names
+consisting of the wildcard character only - users are supposed to just skip
+those always matching expressions. In order to match on literal asterisk
+character at end of interface name, one may escape it using backslash (\).
+
 .Meta expression types
 [options="header"]
 |==================