From 9a71f8aa86c623b197d8ae26c6fb8d38b297593a Mon Sep 17 00:00:00 2001
From: Seth Hall <seth@icir.org>
Date: Wed, 4 Feb 2015 23:33:20 -0500
Subject: [PATCH] Initial commit of RadioTap encapsulation support)

 - It works for me, but I believe that one of the headers I'm stripping
   is variable length so this is unlikely to be complete.
---
 src/iosource/PktSrc.cc | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/iosource/PktSrc.cc b/src/iosource/PktSrc.cc
index 527dadd393..cda5ae3f8b 100644
--- a/src/iosource/PktSrc.cc
+++ b/src/iosource/PktSrc.cc
@@ -171,6 +171,9 @@ int PktSrc::GetLinkHeaderSize(int link_type)
 	case DLT_PPP_SERIAL:	// PPP_SERIAL
 		return 4;
 
+	case DLT_IEEE802_11_RADIO:	// 802.11 plus RadioTap
+		return 59;
+
 	case DLT_RAW:
 		return 0;
 	}
@@ -376,6 +379,26 @@ void PktSrc::Process()
 			}
 		break;
 		}
+
+	case DLT_IEEE802_11_RADIO:
+		{
+		protocol = (data[57] << 8) + data[58];
+		if ( (data[54] == 0 && data[55] == 0 && data[56] == 0) &&
+		     (protocol == 0x0800 || protocol == 0x86DD) )
+			{
+			// Found an IPv4 or IPv6 packet.
+			// Skip over the RadioTap header, the IEEE QoS header,
+			// and logical link control header.
+			data += GetLinkHeaderSize(props.link_type);
+			pkt_hdr_size = 0;
+			}
+		else
+			{
+			Weird("non_ip_packet_in_ieee802_11_radio_encapsulation", &current_packet);
+			goto done;
+			}
+		break;
+		}
 	}
 
 	if ( have_mpls )