diff -up src/Net-Pcap-0.18/Pcap.pm.orig src/Net-Pcap-0.18/Pcap.pm
--- src/Net-Pcap-0.18/Pcap.pm.orig	2016-05-15 07:24:03.000000000 -0600
+++ src/Net-Pcap-0.18/Pcap.pm	2018-02-20 21:56:00.000000000 -0700
@@ -714,6 +714,10 @@ Close the savefile associated with the d
 
 =over
 
+=item B<pcap_list_datalinks($pcap)>
+
+Returns a list of link layer types supported by the given pcap descriptor.
+
 
 =item B<pcap_datalink($pcap)>