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arp: handle ARP proxy after tunnelling

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Only rewind the buffer back to the start of the ethernet header,
rather than all the way.  We don't want to undo earlier
decapsulation.

Change-Id: I5f4b183eb3e8df690695ce3a97e55f3b0579a266
Signed-off-by: David Hotham <david.hotham@metaswitch.com>
This commit is contained in:
David Hotham
2016-09-20 13:34:00 +00:00
committed by Damjan Marion
parent 99492de719
commit 62f88d8813
1 changed files with 4 additions and 3 deletions
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7
vnet/vnet/ethernet/arp.c
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@ -1088,12 +1088,13 @@ arp_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
/*
* Rewind buffer, direct code above not to
* think too hard about it.
* $$$ is the answer ever anything other than
* vlib_buffer_reset(..)?
*/
if_addr0 = &proxy_src;
is_unnum0 = 0;
vlib_buffer_reset (p0);
i32 ethernet_start =
vnet_buffer (p0)->ethernet.start_of_ethernet_header;
i32 rewind = p0->current_data - ethernet_start;
vlib_buffer_advance (p0, -rewind);
n_proxy_arp_replies_sent++;
goto send_reply;
}