tcpdump mailing list archives
Re: [PATCH net 1/2] net: dev_queue_xmit_nit: fix skb->vlan_tci field value
From: Eric Dumazet <eric.dumazet () gmail com>
Date: Wed, 09 Jan 2013 11:51:03 -0800
On Wed, 2013-01-09 at 11:27 -0800, Ani Sinha wrote:
This is wrong. Accelerated or not, the kernel code was organized to have the tags in the packet aux data. So I think this is how user land should be coded as well.
You have your opinion, thats good. My opinion as a kernel developer is that the network tap is here to have a copy of the exact frame given to the _device_. Because in the end, users will complain to netdev, giving us tcpdump traces. And if these traces have nothing to do with what is given to the device, they are almost useless. If you want other taps, and catch frames before/after various netfilter hooks, segmentations, vlan accel, tunnels, or before GRO layer, thats a totally different request. A packet can be modified by a lot of layers in the kernel. And yes, BPF filters can be incredibly complex, but it appears kernel is not a piece of cake. _______________________________________________ tcpdump-workers mailing list tcpdump-workers () lists tcpdump org https://lists.sandelman.ca/mailman/listinfo/tcpdump-workers
Current thread:
- Re: [PATCH net 1/2] net: dev_queue_xmit_nit: fix skb->vlan_tci field value Ani Sinha (Jan 08)
- Re: [PATCH net 1/2] net: dev_queue_xmit_nit: fix skb->vlan_tci field value Ani Sinha (Jan 09)
- Re: [PATCH net 1/2] net: dev_queue_xmit_nit: fix skb->vlan_tci field value Eric Dumazet (Jan 09)
- Re: [PATCH net 1/2] net: dev_queue_xmit_nit: fix skb->vlan_tci field value Ani Sinha (Jan 09)
- Re: [PATCH net 1/2] net: dev_queue_xmit_nit: fix skb->vlan_tci field value Ani Sinha (Jan 09)
- Message not available
- Re: [PATCH net 1/2] net: dev_queue_xmit_nit: fix skb->vlan_tci field value Paul Pearce (Jan 10)
- Re: [PATCH net 1/2] net: dev_queue_xmit_nit: fix skb->vlan_tci field value Daniel Borkmann (Jan 11)
- Re: [PATCH net 1/2] net: dev_queue_xmit_nit: fix skb->vlan_tci field value Eric W. Biederman (Feb 15)
- Re: [PATCH net 1/2] net: dev_queue_xmit_nit: fix skb->vlan_tci field value Eric Dumazet (Jan 09)
- Re: [PATCH net 1/2] net: dev_queue_xmit_nit: fix skb->vlan_tci field value Ani Sinha (Jan 09)