At least https://github.com/the-tcpdump-group/libpcap/blob/master/bpf_dump.c is like BSD-with-attribution At least https://github.com/the-tcpdump-group/libpcap/blob/master/bpf_filter.c is BSD-4 As per https://github.com/the-tcpdump-group/libpcap/blob/master/CMakeLists.txt none of the files for the library-target seem to be licensed as BSD. Reproducible: Always