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DOC: Add some precisions about acl default matching method

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Thierry FOURNIER 2014-05-11 15:49:55 +02:00 committed by Willy Tarreau
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commit 2a06e39a4c
1 changed files with 33 additions and 9 deletions
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42
doc/configuration.txt
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@ -9202,6 +9202,29 @@ would turn a string to an IPv4 address, or apply a netmask to an IP address.
The resulting sample is of the type of the last converter applied to the list,
which defaults to the type of the sample fetch method.
Each sample or converter returns data of a specific type, specified with its
keyword in this documentation. When an ACL is declared using a standard sample
fetch method, certain types automatically involved a default matching method
which are summarized in the table below :
+---------------------+-----------------+
| Sample or converter | Default |
| output type | matching method |
+---------------------+-----------------+
| boolean | bool |
+---------------------+-----------------+
| integer | int |
+---------------------+-----------------+
| ip | ip |
+---------------------+-----------------+
| string | str |
+---------------------+-----------------+
| binary | none, use "-m" |
+---------------------+-----------------+
Note that in order to match a binary samples, it is mandatory to specify a
matching method, see below.
The ACL engine can match these types against patterns of the following types :
- boolean
- integer or integer range
@ -9353,27 +9376,28 @@ For example, all ACLs below are exact equivalent :
acl alternate3 hdr(host) -m beg www.
The table below summarizes the compatibility matrix between sample types
and the pattern types to fetch against. It indicates for each compatible
combination the name of the matching method to be used, prefixed with "*" when
the method is implicit and will work by default without "-m".
The table below summarizes the compatibility matrix between sample or converter
types and the pattern types to fetch against. It indicates for each compatible
combination the name of the matching method to be used, surrounded with angle
brackets ">" and "<" when the method is the default one and will work by
default without "-m".
+-------------------------------------------------+
| Input sample type |
+----------------------+---------+---------+---------+---------+---------+
| pattern type | boolean | integer | IP | string | binary |
| pattern type | boolean | integer | ip | string | binary |
+----------------------+---------+---------+---------+---------+---------+
| none (presence only) | found | found | found | found | found |
+----------------------+---------+---------+---------+---------+---------+
| none (boolean value) | *bool | bool | | bool | |
| none (boolean value) |> bool <| bool | | bool | |
+----------------------+---------+---------+---------+---------+---------+
| integer (value) | int | *int | int | int | |
| integer (value) | int |> int <| int | int | |
+----------------------+---------+---------+---------+---------+---------+
| integer (length) | len | len | len | len | len |
+----------------------+---------+---------+---------+---------+---------+
| IP address | | | *ip | ip | ip |
| IP address | | |> ip <| ip | ip |
+----------------------+---------+---------+---------+---------+---------+
| exact string | str | str | str | str | str |
| exact string | str | str | str |> str <| str |
+----------------------+---------+---------+---------+---------+---------+
| prefix | beg | beg | beg | beg | beg |
+----------------------+---------+---------+---------+---------+---------+