Date: Wed, 30 Apr 2003 11:50:36 +0200 (CEST) From: Dirk-Willem van Gulik <dirkx@webweaving.org> To: freebsd-hackers@freebsd.org Subject: ipfw2 interface / examples Message-ID: <20030430114317.V2090-100000@foem>
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I am recoding some firewall management code which acts on data on the application layer (to open ports etc) from ipfw to the new ipfw2. And am struggling a bit understanding what exactly to pass. - Needless to say - a bug in your rule gives one a 'Adding rule: Invalid argument' errno; is there any way/tool to decode how the IP_FW_ADD struct is passed and get some more insight ? - Is there a simpler example than ipfw2.c, or an raw docs for the getsockopt() api which helps me understand this better. In particular the from/to 'O_IN/(!O_IN)' versus the ability of ipfw.c to set both IP_FW_F_IN and IP_FW_F_OUT to make the rule symetrical around from/to. Thanks. Dw
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