tcpdump mailing list archives
Re: Speed specific Link-Layer Header Types for USB 2.0
From: Michael Richardson via tcpdump-workers <tcpdump-workers () lists tcpdump org>
Date: Tue, 14 Jun 2022 10:49:48 -0400
--- Begin Message --- From: Michael Richardson <mcr () sandelman ca>
Date: Tue, 14 Jun 2022 10:49:48 -0400
Tomasz Moń via tcpdump-workers wrote: >> When low-speed capture is performed, it has to be performed at the leaf >> (in graph-theory sense) connection. Full-speed traffic never make it to >> the low-speed cables, so the capture will contain only low-speed >> packets. > Is there anything still to discuss here? I have opened the pull > requests [1] [2] few weeks ago. I have also prepared Wireshark [3] > change that I would like to merge before Wireshark 4.0 release. > I think I have summed up whole discussion in the libpcap commit > message. High-speed and Low-speed are pretty much clear, as these links > never observe other speed packets. Full-speed is the only disputable > one, but I believe the PRE packets are really a corner case that is not > worth per-packet speed encoding. If the user has obsolete setup to > trigger the corner case in the first place, then such user will > definitely know to just capture at the downstream link for low-speed > traffic. I think that Guy and I thought that you'll be better off with a single LINKTYPE with a subtype header, but if you want to go with three, I don't object. -- ] Never tell me the odds! | ipv6 mesh networks [ ] Michael Richardson, Sandelman Software Works | IoT architect [ ] mcr () sandelman ca http://www.sandelman.ca/ | ruby on rails [
--- End Message ---
_______________________________________________ tcpdump-workers mailing list tcpdump-workers () lists tcpdump org https://lists.sandelman.ca/mailman/listinfo/tcpdump-workers
Current thread:
- Re: Speed specific Link-Layer Header Types for USB 2.0, (continued)
- Message not available
- Re: Speed specific Link-Layer Header Types for USB 2.0 Tomasz Moń via tcpdump-workers (May 08)
- Message not available
- Message not available
- Message not available
- Re: Speed specific Link-Layer Header Types for USB 2.0 Guy Harris via tcpdump-workers (May 09)
- Message not available
- Message not available
- Message not available
- Re: Speed specific Link-Layer Header Types for USB 2.0 Tomasz Moń via tcpdump-workers (May 09)
- Message not available
- Re: Speed specific Link-Layer Header Types for USB 2.0 Tomasz Moń via tcpdump-workers (May 09)
- Message not available
- Message not available
- Message not available
- Re: Speed specific Link-Layer Header Types for USB 2.0 Guy Harris via tcpdump-workers (May 09)
- Message not available
- Message not available
- Message not available
- Message not available
- Re: Speed specific Link-Layer Header Types for USB 2.0 Tomasz Moń via tcpdump-workers (May 09)
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Re: Speed specific Link-Layer Header Types for USB 2.0 Guy Harris via tcpdump-workers (May 09)
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Re: Speed specific Link-Layer Header Types for USB 2.0 Tomasz Moń via tcpdump-workers (May 09)
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Re: Speed specific Link-Layer Header Types for USB 2.0 Tomasz Moń via tcpdump-workers (May 10)
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Re: Speed specific Link-Layer Header Types for USB 2.0 Tomasz Moń via tcpdump-workers (Jun 13)
- Re: Speed specific Link-Layer Header Types for USB 2.0 Michael Richardson via tcpdump-workers (Jun 14)
- Message not available
- Re: Speed specific Link-Layer Header Types for USB 2.0 Tomasz Moń via tcpdump-workers (Jun 19)