-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, I need to specify packet direction for my sniffing application, but current libpcap doesn't offer this functionality. I've found a patch[1], which adds ability to set direction of packet capture. The patch works good, but it modifies pcap_pkthdr struct from pcap.h, which can be considered API change[2]. Therefore I streamlined this patch, so now it doesn't change public structures. It adds just new function:
int pcap_direction(pcap_t *p, direction_t d) and new enum typedef - direction_t. To specify direction pcap_direction() have to be called after pcap_open_live() with desired direction (D_IN, D_OUT, D_INOUT). Default direction, in case pcap_direction() was not called is D_INOUT. Information about direction is not saved to dump file. I think of it as promiscuous flag, which also isn't saved. I've tested it on the latest libpcap from cvs (2005.04.28). I've read that pcap-ng will allow to specify additional options, such as direction, without changing the API and with ability to save pcap dumps in portable way. But it seems pcap-ng won't be available too early, so pcap_direction() could be used as temporary, but minimal and clean solution. What do you people think about it? Is there any chance for this to go into mainline libpcap? (if so, I would be very happy :) ) My time and skills are limited, but if there are changes required, I will do my best. Pawel Pokrywka [1] http://www.beonline.com.au/kb/pcap.html [2] http://marc.theaimsgroup.com/?l=tcpdump-workers&m=108146017831222&w=2 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iQD1AwUBQnN3iAYJ6m8RUpKnAQK6GwcAreJlvs94g1igI0ILXg9nsBLnFzeG04Zb BlNf/oJDSWUzFb6c7iDqm20bSRb0sXi1371JKX4Sq1r2scn+/5ayYrWcrYuzeL0S D85EJ+NM9OKRmFvok1ELQ0jnHbWJS5P3Uvue1tCvj2NVA+77V8PDshGpB4RGSWiy qfSp3USnMzRw1rbaOI12qbZCMSI92eppO9LgWqD6SaFhxHKoHa9opr5aL70MCs0K pMp5GFk832JBh3qtesKXrW01SeOqWPeB0baJLPv+uLz253Fv8/VLUZVD04M3uHxc DtljhvA7HoM= =wV6j -----END PGP SIGNATURE-----
libpcap-direction-minimal.patch.gz
Description: GNU Zip compressed data
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