[dpdk-dev] Pcap question

liljegren.mats2 at gmail.com liljegren.mats2 at gmail.com
Thu Mar 6 10:00:39 CET 2014

> I guess something is still wrong:

> testpmd application is reporting "PMD: pcap library cannot send packets,
> please rebuild with a more up to date libpcap" message when I try creating
> a bridge between two network cards.

> I am more than sure that older version of pcap is not installed:

> cigol at cigol-desktop:~/debug$ ls -l /usr/local/lib/*pcap*
> -rw-r--r-- 1 root root 1274936 Mar  5 23:26 /usr/local/lib/libpcap.a
> lrwxrwxrwx 1 root root      12 Mar  5 23:26 /usr/local/lib/libpcap.so ->
> libpcap.so.1
> lrwxrwxrwx 1 root root      16 Mar  5 23:26 /usr/local/lib/libpcap.so.1 ->
> libpcap.so.1.5.3
> -rwxr-xr-x 1 root root  786725 Mar  5 23:26 /usr/local/lib/libpcap.so.1.5.3

> Do you have any thoughts?

I had this problem a couple of months ago, and tracked it down to a
check for a macro named pcap_sendpacket. I didn't have this macro, but
it is a function, so I simply removed the check and got things
I thought I mentioned this in the DPDK mailing list, but I cannot find
any evidence of this. So I probably didn't...

Since I have lost the original patch I used to solve this issue, I
made a new patch that might work for you, which you should be able to
find as a reply to this message. It was made completely out of my
memory of this and I haven't tested it, but the change is pretty
trivial so I'm sure you can work out any mistakes I might have made.

I hope this helps you.

Best regards,
Mats Liljegren

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