On Apr 12, 2019, at 12:54 PM, Guy Harris <guy@xxxxxxxxxxxx> wrote: > I see nothing about a struct gsmtap_hdr: > > http://osmocom.org/projects/baseband/wiki/GSMTAP > > that... > > 2) would prevent it from being at the beginning of a LINKTYPE_GSMTAP/DLT_GSMTAP packet in a pcap or pcapng file. With a specification based on http://cgit.osmocom.org/libosmocore/plain/include/osmocom/core/gsmtap.h