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Diffstat (limited to 'doc/bird.sgml')
| -rw-r--r-- | doc/bird.sgml | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml index 1808d04c..786f124b 100644 --- a/doc/bird.sgml +++ b/doc/bird.sgml @@ -1471,11 +1471,16 @@ in the foot). <cf/*/ matches any (even empty) sequence of arbitrary AS numbers and <cf/?/ matches one arbitrary AS number. For example, if <cf>bgp_path</cf> is 4 3 2 1, then: <tt>bgp_path ˜ [= * 4 3 * =]</tt> is true, - but <tt>bgp_path ˜ [= * 4 5 * =]</tt> is false. BGP mask - expressions can also contain integer expressions enclosed in parenthesis - and integer variables, for example <tt>[= * 4 (1+2) a =]</tt>. You can - also use ranges (e.g. <tt>[= * 3..5 2 100..200 * =]</tt>) and sets - (e.g. <tt>[= 1 2 [3, 5, 7] * =]</tt>). + but <tt>bgp_path ˜ [= * 4 5 * =]</tt> is false. There is also + <cf/+/ operator which matches one or multiple instances of previous + expression, e.g. <tt>[= 1 2+ 3 =]</tt> matches both path 1 2 3 and path + 1 2 2 2 3, but not 1 3 nor 1 2 4 3. Note that while <cf/*/ and <cf/?/ + are wildcard-style operators, <cf/+/ is regex-style operator. + + BGP mask expressions can also contain integer expressions enclosed in + parenthesis and integer variables, for example <tt>[= * 4 (1+2) a =]</tt>. + You can also use ranges (e.g. <tt>[= * 3..5 2 100..200 * =]</tt>) + and sets (e.g. <tt>[= 1 2 [3, 5, 7] * =]</tt>). <tag><label id="type-clist">clist</tag> Clist is similar to a set, except that unlike other sets, it can be |