From d8d525fff2dc34db62de2598767046de813e4f0d Mon Sep 17 00:00:00 2001
From: Ivan Nardi <12729895+IvanNardi@users.noreply.github.com>
Date: Wed, 27 Jul 2022 11:46:45 +0200
Subject: Update the protocol bitmask for some protocols (#1675)

Tcp retransmissions should be ignored.

Remove some unused protocol bitmasks.

Update script to download Whatsapp IP list.
---
 src/lib/ndpi_main.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'src/lib/ndpi_main.c')

diff --git a/src/lib/ndpi_main.c b/src/lib/ndpi_main.c
index 5f6ff9aa5..9337d003f 100644
--- a/src/lib/ndpi_main.c
+++ b/src/lib/ndpi_main.c
@@ -6383,8 +6383,10 @@ ndpi_protocol ndpi_detection_process_packet(struct ndpi_detection_module_struct
     flow->tree_risk_checked = 1;
   }
 
-  /* It is common to not trigger any dissectors for pure TCP ACK packets */
-  if(num_calls == 0 && packet->payload_packet_len != 0)
+  /* It is common to don't trigger any dissectors for pure TCP ACKs
+     and for for retransmissions */
+  if(num_calls == 0 &&
+     (packet->tcp_retransmission == 0 && packet->payload_packet_len != 0))
     flow->fail_with_unknown = 1;
   flow->num_dissector_calls += num_calls;
 
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