Note that what follows the ipnet pseudo-header is an IPv4 or IPv6

[libpcap] / pcap / bpf.h

diff --git a/pcap/bpf.h b/pcap/bpf.h
index c5a11d32033041814784a6611374a50328b51c8d..91f33eb57264d07bc1c0232f88b91ac2ad6fb869 100644 (file)
--- a/pcap/bpf.h
+++ b/pcap/bpf.h
@@ -938,6 +938,9 @@ struct bpf_version {
  * A zone number of 0 is the global zone; a zone number of 0xffffffff
  * means that the packet arrived from another host on the network, not
  * from another zone on the same machine.
+ *
+ * An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates
+ * which of those it is.
  */
 #define DLT_IPNET                      226