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Moved description of filters to programmers docs.

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Pavel Machek 2000-05-30 10:13:02 +00:00
parent 9e85a5e6f2
commit 298f2530ec
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doc/bird.sgml
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@ -245,12 +245,6 @@ call other functions, but recursion is not allowed. Filter language contains con
as if's and switches, but it allows no loops. Filters are as if's and switches, but it allows no loops. Filters are
interpreted. Filter using many features can be found in <file>filter/test.conf</file>. interpreted. Filter using many features can be found in <file>filter/test.conf</file>.
<p>You can find sources of filters language in <file>filter/</file>
directory. <file>filter/config.Y</file> contains filter grammar, and basically translates source from
user into tree of <cf>f_inst</cf> structures. These trees are later interpreted using code in
<file>filter/filter.c</file>. Filters internally work with values/variables in <tt>struct
f_val</tt>, which contains type of value and value.
<p>Filter basically gets the route, looks at its attributes and <p>Filter basically gets the route, looks at its attributes and
modifies some of them if it wishes. At the end, it decides, whether to modifies some of them if it wishes. At the end, it decides, whether to
pass change route through (using <cf/accept/), or whether to <cf/reject/ given route. It looks pass change route through (using <cf/accept/), or whether to <cf/reject/ given route. It looks