tcpdump mailing list archives
Re: LINUX_SLL2
From: Denis Ovsienko <denis () ovsienko info>
Date: Wed, 25 Feb 2015 10:20:40 +0000
---- On Sun, 15 Feb 2015 19:34:37 +0000 Paul "LeoNerd" Evans<leonerd () leonerd org uk> wrote ----
On Tue, 13 Jan 2015 00:29:43 +0200 Denis Ovsienko <denis () ovsienko info> wrote:List, there is an idea to improve libpcap and tcpdump to enable the latter to print interface name (index) and direction of each packet: https://github.com/the-tcpdump-group/tcpdump/issues/296 https://github.com/the-tcpdump-group/libpcap/issues/127 It is pretty much clear how to do that: the only way would be through a new DLT, a proposal for which is made here: https://github.com/the-tcpdump-group/tcpdump-htdocs/pull/3 Let me ask for feedback on this change because the original author has issues posting to the mailing list.So, uhm... Any thoughts on this so far? I'm really keen to have it applied, because I already have a full implementation of a tcpdump-like program that I wrote almost entirely *because* libpcap+tcpdump can't do this. It would be great to have it supported by core after all.
There are following differences of the proposed SLL2 from the existing SLL: 1. the Packet type field is 1 byte long (now as in struct sockaddr_ll) 2. same for the Link-layer address length field 3. there is a new Interface index field 4 bytes long (same as in sockaddr_ll) This makes SLL2 quite close to sockaddr_ll (except the the order of fields and the sll_family field, which is told to be equal to AF_PACKET in this case). In other words, it looks sufficiently good on paper to proceed with the implementation. -- Denis Ovsienko _______________________________________________ tcpdump-workers mailing list tcpdump-workers () lists tcpdump org https://lists.sandelman.ca/mailman/listinfo/tcpdump-workers
Current thread:
- LINUX_SLL2 Denis Ovsienko (Jan 12)
- Re: LINUX_SLL2 - TEST REPLY Paul LeoNerd Evans (Jan 13)
- Re: LINUX_SLL2 - TEST REPLY Denis Ovsienko (Jan 13)
- Re: LINUX_SLL2 Paul "LeoNerd" Evans (Feb 15)
- Re: LINUX_SLL2 Denis Ovsienko (Feb 25)
- Re: LINUX_SLL2 Paul "LeoNerd" Evans (Mar 02)
- Re: LINUX_SLL2 Paul "LeoNerd" Evans (Mar 23)
- Re: LINUX_SLL2 Denis Ovsienko (Feb 25)
- Re: LINUX_SLL2 - TEST REPLY Paul LeoNerd Evans (Jan 13)