From 06c7b6acc6e29eb2e545a83f2e694046d23a4d2b Mon Sep 17 00:00:00 2001
From: Simon <simon@gb7fr.org.uk>
Date: Wed, 6 Oct 2021 11:27:23 +0100
Subject: [PATCH] Reject null streamid from HBP

---
 hblink.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hblink.py b/hblink.py
index f57a3bc..d9ead1b 100755
--- a/hblink.py
+++ b/hblink.py
@@ -466,6 +466,8 @@ class HBSYSTEM(DatagramProtocol):
                 _frame_type = (_bits & 0x30) >> 4
                 _dtype_vseq = (_bits & 0xF) # data, 1=voice header, 2=voice terminator; voice, 0=burst A ... 5=burst F
                 _stream_id = _data[16:20]
+                if not bool(_stream_id):
+                    logger.warning('(%s) CALL DROPPED AS STREAM ID IS NULL FROM SUBSCRIBER %s', self._system, int_id(_rf_src))
                 #logger.debug('(%s) DMRD - Seqence: %s, RF Source: %s, Destination ID: %s', self._system, _seq, int_id(_rf_src), int_id(_dst_id))
                 # ACL Processing
                 if self._CONFIG['GLOBAL']['USE_ACL']: