From b9d06d6ab7b874d58154ff12f17eccf20ca871ff Mon Sep 17 00:00:00 2001
From: yogev chaimovich <yogev.chaimovich@verint.com>
Date: Sun, 28 Feb 2016 11:24:59 +0200
Subject: [PATCH] Added more than one vlan support (with Avi Slavkin)

---
 src/libnids.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/libnids.c b/src/libnids.c
index 42b5f96..a92a570 100644
--- a/src/libnids.c
+++ b/src/libnids.c
@@ -253,6 +253,12 @@ void nids_pcap_handler(u_char * par, struct pcap_pkthdr *hdr, u_char * data)
 	} else if (data[12] == 0x81 && data[13] == 0) {
 	    /* Skip 802.1Q VLAN and priority information */
 	    nids_linkoffset = 18;
+	    int vlan_offset = 4;
+	    while(data[12 + vlan_offset] == 0x81 && data[13 + vlan_offset] == 0)
+	    {
+	    	nids_linkoffset += 4;
+	    	vlan_offset = vlan_offset + 4;
+	    }
 	} else
 	    /* non-ip frame */
 	    return;