On Wed, 9 Oct 2019 11:11:46 +0000 "Ananyev, Konstantin" <konstantin.anan...@intel.com> wrote:
> Hi Morten, > > > > > Hi Konstantin and Stephen, > > > > I just noticed the same bug in your bpf and pcap libraries: > > > > You are using rte_pktmbuf_mtod(), but should be using rte_pktmbuf_read(). > > Otherwise you cannot read data across multiple segments. > > In plain data buffer mode expected input for BPF program is start of first > segment packet data. > Other segments are simply not available to BPF program in that mode. > AFAIK, cBPF uses the same model. > > > > > > > Med venlig hilsen / kind regards > > - Morten Brørup > For packet capture, the BPF program is only allowed to look at first segment. pktmbuf_read is expensive and can cause a copy.
