From 1b3ef7d7b2dde9d58cb217d3d7fb6b14d6281153 Mon Sep 17 00:00:00 2001
From: Ivan Nardi <12729895+IvanNardi@users.noreply.github.com>
Date: Mon, 8 Apr 2024 10:24:51 +0200
Subject: STUN: improve extraction of Mapped-Address metadata (#2370)

Enable parsing of Mapped-Address attribute for all STUN flows: that
means that STUN classification might require more packets.

Add a configuration knob to enable/disable this feature.

Note that we can have (any) STUN metadata also for flows *not*
classified as STUN (because of DTLS).

Add support for ipv6.

Restore the correct extra dissection logic for Telegram flows.
---
 fuzz/fuzz_config.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'fuzz')

diff --git a/fuzz/fuzz_config.cpp b/fuzz/fuzz_config.cpp
index 2453b469e..3654e583e 100644
--- a/fuzz/fuzz_config.cpp
+++ b/fuzz/fuzz_config.cpp
@@ -178,6 +178,11 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     sprintf(cfg_value, "%d", value);
     ndpi_set_config(ndpi_info_mod, "stun", "max_packets_extra_dissection", cfg_value);
   }
+  if(fuzzed_data.ConsumeBool()) {
+    value = fuzzed_data.ConsumeIntegralInRange(0, 1 + 1);
+    sprintf(cfg_value, "%d", value);
+    ndpi_set_config(ndpi_info_mod, "stun", "metadata.attribute.mapped_address", cfg_value);
+  }
   if(fuzzed_data.ConsumeBool()) {
     value = fuzzed_data.ConsumeIntegralInRange(0, 1 + 1);
     sprintf(cfg_value, "%d", value);
-- 
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