From 3d5f0ee3150629997ca03e4089611bd05181e21f Mon Sep 17 00:00:00 2001
From: Luca Deri <deri@ntop.org>
Date: Sun, 27 Oct 2019 23:20:56 +0100
Subject: Implemented stacked DPI decoding

---
 example/reader_util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'example')

diff --git a/example/reader_util.c b/example/reader_util.c
index b676fd426..6cb150d87 100644
--- a/example/reader_util.c
+++ b/example/reader_util.c
@@ -1427,7 +1427,7 @@ struct ndpi_proto ndpi_workflow_process_packet(struct ndpi_workflow * workflow,
     ip_offset += 4;
     vlan_packet = 1;
     // double tagging for 802.1Q
-    if(type == 0x8100) {
+    while((type == 0x8100) && (ip_offset < header->caplen)) {
       vlan_id = ((packet[ip_offset] << 8) + packet[ip_offset+1]) & 0xFFF;
       type = (packet[ip_offset+2] << 8) + packet[ip_offset+3];
       ip_offset += 4;
-- 
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