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authorOndrej Zajicek (work) <santiago@crfreenet.org>2021-05-18 20:41:01 +0200
committerOndrej Zajicek (work) <santiago@crfreenet.org>2021-05-18 20:41:01 +0200
commitc3c691e95cd40d8654b720be8d9a8ae9fb050951 (patch)
tree12aabbb2db6144082a4ad648fae20139407188d8 /doc/bird.sgml
parentabc9ccc5cb7a3adcbb2090ba7314031b835b0e04 (diff)
Flowspec: Documentation update
Diffstat (limited to 'doc/bird.sgml')
-rw-r--r--doc/bird.sgml2
1 files changed, 2 insertions, 0 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml
index ff599216..90ceb184 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -5094,6 +5094,8 @@ Bitmask matching is written using <m/value/<cf>/</cf><m/mask/ or
<cf/!/<m/value/<cf>/</cf><m/mask/ pairs. It means that <cf/(/<m/data/ <cf/&/
<m/mask/<cf/)/ is or is not equal to <m/value/. It is also possible to use
multiple value/mask pairs connected by logical operators <cf/&&/ or <cf/||/.
+Note that for negated matches, value must be either zero or equal to bitmask
+(e.g. !0x0/0xf or !0xf/0xf, but not !0x3/0xf).
<sect2>IPv4 Flowspec