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Date: Tue, 15 Apr 2014 01:34:47 +0000 From: Dennis Punjabi <linuxdev@...s.bz> To: Atzm Watanabe <atzm@...atosphere.co.jp>, Daniel Borkmann <dborkman@...hat.com> CC: Toshiaki Makita <toshiaki.makita1@...il.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: RE: 802.1AD packets - Kernel changes ether type from 88A8 to 8100 on all packets. >>> Hi. >>> >>> Though I'm not an expert with libpcap, I feel tcpdump sometimes shows a >>> wrong vlan protocol (if vlan_tci is used). >>> >>> Maybe this topic has relevance? >>> >>> packet: deliver VLAN TPID to userspace >>> http://marc.info/?l=linux-netdev&m=138728859001934&w=2 >>> http://marc.info/?l=linux-netdev&m=138728859601935&w=2 >>> http://marc.info/?l=linux-netdev&m=138728860101937&w=2 >>> http://marc.info/?l=linux-netdev&m=138728860601939&w=2 >> >> The issue seems not to be in AF_PACKET as it just 'playes dumb' and propagates >> what has been set in the skb as metadata to user space e.g., see ... > > Yes. > Also I sent a small pull-request for libpcap via github to fix this > issue about 2 weeks ago, but it is not pulled yet, still opened: > > https://github.com/the-tcpdump-group/libpcap/pull/346 Thanks Atzm and everyone for clarifying that and pointing me in the right direction. Was not too sure where to begin looking. I will apply the individual patches and try the 802.1AD filtering on the bridge. Appreciate your help. Best Regards, Dennis -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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