tcpdump mailing list archives
Re: Patch to print out IP data in PPP HDLC packets
From: Darren Reed <darrenr () reed wattle id au>
Date: Mon, 5 Jul 2004 18:27:24 +1000 (EST)
Normally a NIC or interface providing access to an HDLC link/network would perform de-bytestuffing internally before the packets ever get to libpcap. Obviously de-bytestuffing a packet twice can corrupt data. Do we really want to have de-bytestuffing code in libpcap?
This isn't in libpcap, it's tcpdump.
Surely at minimum it should be off by default and selectable as an option perhaps, if necessary?
No. The frame format here is something like this: ethernet{ip{l2tp{hdlc{ppp{ip{gre{ppp{...}}}}}}}} I'm sniffing at the ethernet level, and I want to see inside as many headers as I can with tcpdump, so that means de-bitstuffing the HDLC. Darren - This is the tcpdump-workers list. Visit https://lists.sandelman.ca/ to unsubscribe.
Current thread:
- Patch to print out IP data in PPP HDLC packets Darren Reed (Jul 01)
- Re: Patch to print out IP data in PPP HDLC packets Hannes Gredler (Jul 01)
- Re: Patch to print out IP data in PPP HDLC packets Darren Reed (Jul 01)
- Re: Patch to print out IP data in PPP HDLC packets Hannes Gredler (Jul 02)
- Re: Patch to print out IP data in PPP HDLC packets Guy Harris (Jul 02)
- Re: Patch to print out IP data in PPP HDLC packets Darren Reed (Jul 02)
- Re: Patch to print out IP data in PPP HDLC packets Darren Reed (Jul 01)
- Re: Patch to print out IP data in PPP HDLC packets Hannes Gredler (Jul 01)
- Re: Patch to print out IP data in PPP HDLC packets Hannes Gredler (Jul 02)
- Re: Patch to print out IP data in PPP HDLC packets Stephen Donnelly (Jul 04)
- Re: Patch to print out IP data in PPP HDLC packets Darren Reed (Jul 05)
- Re: Patch to print out IP data in PPP HDLC packets Guy Harris (Jul 05)
- Re: Patch to print out IP data in PPP HDLC packets Stephen Donnelly (Jul 04)