Ask Your Question

Revision history [back]

How to filter packets with BPF in a C++ program when they're not read from a live capture or pcap/pcap-ng file?


I am using a DPDK application. I have a pointer to a packet and trying to match it against a BPF filter using:

// Initialized before looking at the packet pcap_open_dead(DLT_EN10MB, 65535); pcap_compile(...)

// when I have a packet, I call

The packets are always VLAN encapsulated. Whenever the filter is "vlan", I match all the packets.

Other than that, it is not able to filter any other type (e.g., ip, arp).

Can anyone help me out figuring what might be the problem?

Thanks, Sumit