Potential memory leak in nsock_pcap.c line 114. Calling pcap_compile() without calling pcap_freecode() to free the memory will cause a memory leak.
Doc says "pcap_freecode() is used to free up allocated memory pointed to by a bpf_program struct generated by pcap_compile(3PCAP) when that BPF program is no longer needed, for example after it has been made the filter program for a pcap structure by a call to pcap_setfilter(3PCAP)."