tcpdump mailing list archives

Re: pcap_inject() an Ethernet's FCS

From: Guy Harris <guy () alum mit edu>
Date: Thu, 14 Jan 2010 17:50:09 -0800


On Jan 14, 2010, at 5:45 PM, David Crowcroft wrote:

It looks like you either forgot to attach the files, or majordomo
stripped them off your e-mail.


The latter.

(plese resend them off-list to me, if necessary).


Will do.

For instance, do I need to calculate the FCS in the Ethernet frames I
send?


*Probably* not, at least in most cases.


Is there a portable way of deciding whether I *need* to do it?


No.  I don't even know whether there are any platforms where you do.
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Current thread:

pcap_inject() an Ethernet's FCS David Crowcroft (Jan 14)
- Re: pcap_inject() an Ethernet's FCS Guy Harris (Jan 14)
  - Re: pcap_inject() an Ethernet's FCS David Crowcroft (Jan 14)
    - Re: pcap_inject() an Ethernet's FCS Guy Harris (Jan 14)
    - Re: pcap_inject() an Ethernet's FCS Aaron Turner (Jan 14)
    - bpf filtering for new DLT type Lidwa, Eric (GSFC-582.0)[SGT INC] (Jan 15)
    - Re: bpf filtering for new DLT type Guy Harris (Jan 15)
    - Re: bpf filtering for new DLT type Lidwa, Eric (GSFC-582.0)[SGT INC] (Jan 15)