Wireshark mailing list archives
Re: UI for packets differing by a checksum on the end
From: Guy Harris <guy () alum mit edu>
Date: Thu, 29 Jul 2010 13:56:01 -0700
On Jul 29, 2010, at 1:18 PM, Jon Smirl wrote:
The hardware that is leaving the FCS on encapsulates them as Ethernet frames with an Ethertype of 0x809a.
OK, so these *aren't* native 802.15.4 captures, in the sense that the link-layer header at the beginning of the raw frame data isn't an 802.15.4 header, it's an Ethernet header. In that case, the WTAP_ENCAP_ values are completely irrelevant; the WTAP_ENCAP_ value for the packets in question is, and should be, WTAP_ENCAP_ETHERNET. Don't even bother defining WTAP_ENCAP_IEEE802_15_4_NOFCS. So what does the hardware that *doesn't* include the FCS use? Is it encapsulating them inside Ethernet frames? If so, what Ethernet type does it use? Does it also use 0x809a? If so, could it choose a different Ethertype, so that programs that see those frames can automatically determine whether there's an FCS or not? ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe
Current thread:
- UI for packets differing by a checksum on the end Jon Smirl (Jul 29)
- Re: UI for packets differing by a checksum on the end Guy Harris (Jul 29)
- Re: UI for packets differing by a checksum on the end Jon Smirl (Jul 29)
- Re: UI for packets differing by a checksum on the end Guy Harris (Jul 29)
- Re: UI for packets differing by a checksum on the end Jon Smirl (Jul 29)
- Re: UI for packets differing by a checksum on the end Jon Smirl (Jul 29)
- Re: UI for packets differing by a checksum on the end Guy Harris (Jul 29)