Date: Sun, 3 Aug 2003 12:13:43 -0700 From: Andrew Konstantinov <andrei@andruxa.sytes.net> To: freebsd-hackers@freebsd.org Subject: libpcap Message-ID: <20030803191343.GA1224@andruxa.sytes.net>
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--lrZ03NoBR/3+SXJZ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hello, I am writing a program which takes advantage of libpcap but I've run into several problems with it: 1) Is there any way how I can specify in the filter description that it should match only incoming packets on some interface? inbound/outbound keywords work only for 'slip' (according to tcpdump man page). I could do that with 'not src host' and then put the local hostname after that, but is there a more general solution, without the need for local hostname or ip address? 2) I can't figure out how to setup a filter so it could match several ports at once. For example, I want the filter to only match 21-25 and 113 ports for incoming traffic. How do I do that? Right know I can see only two solutions. I could simply sniff all the traffic, and then filter out the interesting ports by myself, or I could setup several filters each of which would be responsible for a specific port. But both solutions seem to be inefficient. Is there a better way to accomplish this? Any help will be greatly appriciated. Thanks in advance. Andrew --lrZ03NoBR/3+SXJZ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (FreeBSD) iD8DBQE/LV7nttaE8kbpwrARAkcBAJ4l8ySo2vRGrjCA51uktzon3owQYwCcCkcL LrxIUZOPTJfsZ3wSD9vmrz4= =Z5DW -----END PGP SIGNATURE----- --lrZ03NoBR/3+SXJZ--
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