Messages in this thread | | | Date | Thu, 01 Nov 2007 15:07:23 -0700 (PDT) | Subject | Re: expected behavior of PF_PACKET on NETIF_F_HW_VLAN_RX device? | From | David Miller <> |
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From: Rick Jones <rick.jones2@hp.com> Date: Thu, 01 Nov 2007 15:04:12 -0700
> David Miller wrote: > > From: Rick Jones <rick.jones2@hp.com> > > Date: Thu, 01 Nov 2007 14:48:45 -0700 > > > > > >>One could I suppose try to ammend the information passed to allow > >>tcpdump to say "oh, this was a tx packet on the same machine on > >>which I am tracing so don't worry about checksum mismatch" > > > > > > We do this already! > > I'll try to go pester folks in tcpdump-workers then.
The thing to check is "TP_STATUS_CSUMNOTREADY".
When using mmap(), it will be provided in the descriptor. When using recvmsg() it will be provided via a PACKET_AUXDATA control message when enabled via the PACKET_AUXDATA socket option.
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