Hi,
I open a PFRING with pfring_open(), enabled extended headers and then add
another interface to it with pfring_bind(). I see packets arriving on each
interface but when I use pfring_recv to get the packets the if_index field in
the extended_hdr always refers to the index of the interface passed in the
original pfring_open() call. Packets arriving on the pfring_bind() interface
get an incorrect if_index of the primary interface.
I traced the problem to this rather suspect line:
PF_RING/userland/lib/pfring.c:636
hdr->caplen = min_val(hdr->caplen, ring->caplen),
hdr->extended_hdr.if_index = ring->device_id;
What is the purpose of overriding the extended_hdr.if_index with the
ring->device_id here? The if_index is already filled in at this point and the
statement just changes it to the primary interface for all calls. The comma ','
here looks like the statement was relying on some side effect of the min_val()
macro that no longer works?
Is it save to just delete this assignment to if_index here?
Regards,
Denis
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