On Oct 12, 2010, at 2:04 PM, Yo Mismo wrote:
> I want to add a wtap encapsulation for a new link layer protocol.
A Wiretap encapsulation is useful only if you have a capture file format that uses it.
What type of capture file is this?
If it's pcap or pcap-ng format, see the replies from Christopher Maynard and Jeff Morris - you'd need a DLT_ value (well, technically, a LINKTYPE_ value, but for all new values, they're the same) for use in the pcap file header or the pcap-ng Interface Description Block, and you could either use one of the "user-defined" values, in which case you'd also use the corresponding "user-defined" WTAP_ENCAP_ value, or you could get a new DLT_ value from tcpdump-workers@xxxxxxxxxxx, and modify wiretap/pcap-common.c to map that DLT_ value to your new WTAP_ENCAP_ value.
If it's some other format, you'd have to modify the Wiretap file for that file format to map a capture using that link-layer protocol to your new WTAP_ENCAP_ value.
