diff --git a/t/.gitignore b/t/.gitignore
index 3429703e3..ba47a6819 100644
--- a/t/.gitignore
+++ b/t/.gitignore
@@ -61,3 +61,4 @@ spandsp_send_fax_pcm
 spandsp_send_fax_t38
 spandsp_logging.h
 aead-aes-crypt
+tcp_listener.c
diff --git a/t/auto-daemon-tests.pl b/t/auto-daemon-tests.pl
index dda557d29..4e8236e8e 100755
--- a/t/auto-daemon-tests.pl
+++ b/t/auto-daemon-tests.pl
@@ -40,6 +40,586 @@ my ($sock_a, $sock_b, $sock_c, $sock_d, $port_a, $port_b, $ssrc, $ssrc_b, $resp,
 
 
 
+new_call;
+
+offer('null address test A',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio 16478 RTP/AVP 8
+c=IN IP4 0.0.0.0
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 0.0.0.0
+a=rtpmap:8 PCMA/8000
+a=sendonly
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('null address test B',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio 16478 RTP/AVP 8
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio PORT RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=sendonly
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('null address test C',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio 16478 RTP/AVP 8
+c=IN IP6 ::
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP6 ::
+a=rtpmap:8 PCMA/8000
+a=sendonly
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('null address test D',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP6 ::
+t=0 0
+m=audio 16478 RTP/AVP 8
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP6 ::
+t=0 0
+m=audio PORT RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=sendonly
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('control E',
+	{ 'address-family' => 'IP6' }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio 16478 RTP/AVP 8
+c=IN IP4 198.51.110.1
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP6 2001:db8:4321::1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('control F',
+	{ 'address-family' => 'IP6' }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 198.51.110.1
+t=0 0
+m=audio 16478 RTP/AVP 8
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP6 2001:db8:4321::1
+t=0 0
+m=audio PORT RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('null address test E',
+	{ 'address-family' => 'IP6' }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio 16478 RTP/AVP 8
+c=IN IP4 0.0.0.0
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP6 ::
+a=rtpmap:8 PCMA/8000
+a=sendonly
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('null address test F',
+	{ 'address-family' => 'IP6' }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio 16478 RTP/AVP 8
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP6 ::
+t=0 0
+m=audio PORT RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=sendonly
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('control G',
+	{ 'address-family' => 'IP4' }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio 16478 RTP/AVP 8
+c=IN IP6 2001:db8:8765::1
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('control H',
+	{ 'address-family' => 'IP4' }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP6 2001:db8:8765::1
+t=0 0
+m=audio 16478 RTP/AVP 8
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 203.0.113.1
+t=0 0
+m=audio PORT RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('null address test G',
+	{ 'address-family' => 'IP4' }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio 16478 RTP/AVP 8
+c=IN IP6 ::
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 0.0.0.0
+a=rtpmap:8 PCMA/8000
+a=sendonly
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('null address test H',
+	{ 'address-family' => 'IP4' }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP6 ::
+t=0 0
+m=audio 16478 RTP/AVP 8
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio PORT RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=sendonly
+a=rtcp:PORT
+SDP
+
+new_call;
+
+offer('trickle ICE test A',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio 9 RTP/AVP 8
+a=ice-ufrag:Ci7n
+a=ice-pwd:l9QndxLG6OycZRcQe9zcT95c
+a=ice-options:trickle
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 203.0.113.1
+t=0 0
+m=audio PORT RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+a=ice-ufrag:ICEUFRAG
+a=ice-pwd:ICEPWD
+a=candidate:ICEBASE 1 UDP 2130706431 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 1 UDP 2130706175 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706430 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706174 2001:db8:4321::1 PORT typ host
+SDP
+
+new_call;
+
+offer('trickle ICE test B',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 198.51.110.1
+t=0 0
+m=audio 6666 RTP/AVP 8
+a=ice-ufrag:Ci7n
+a=ice-pwd:l9QndxLG6OycZRcQe9zcT95c
+a=ice-options:trickle
+a=rtcp:9 IN IP4 0.0.0.0
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 203.0.113.1
+t=0 0
+m=audio PORT RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+a=ice-ufrag:ICEUFRAG
+a=ice-pwd:ICEPWD
+a=candidate:ICEBASE 1 UDP 2130706431 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 1 UDP 2130706175 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706430 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706174 2001:db8:4321::1 PORT typ host
+SDP
+
+new_call;
+
+offer('trickle ICE test C',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio 9 RTP/AVP 8
+a=ice-ufrag:Ci7n
+a=ice-pwd:l9QndxLG6OycZRcQe9zcT95c
+a=ice-options:trickle
+a=rtcp:9 IN IP4 0.0.0.0
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP4 203.0.113.1
+t=0 0
+m=audio PORT RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+a=ice-ufrag:ICEUFRAG
+a=ice-pwd:ICEPWD
+a=candidate:ICEBASE 1 UDP 2130706431 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 1 UDP 2130706175 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706430 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706174 2001:db8:4321::1 PORT typ host
+SDP
+
+new_call;
+
+offer('trickle ICE test D',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio 9 RTP/AVP 8
+c=IN IP4 0.0.0.0
+a=ice-ufrag:Ci7n
+a=ice-pwd:l9QndxLG6OycZRcQe9zcT95c
+a=ice-options:trickle
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+a=ice-ufrag:ICEUFRAG
+a=ice-pwd:ICEPWD
+a=candidate:ICEBASE 1 UDP 2130706431 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 1 UDP 2130706175 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706430 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706174 2001:db8:4321::1 PORT typ host
+SDP
+
+new_call;
+
+offer('trickle ICE test E',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio 6666 RTP/AVP 8
+c=IN IP4 198.51.110.1
+a=ice-ufrag:Ci7n
+a=ice-pwd:l9QndxLG6OycZRcQe9zcT95c
+a=ice-options:trickle
+a=rtcp:9 IN IP4 0.0.0.0
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+a=ice-ufrag:ICEUFRAG
+a=ice-pwd:ICEPWD
+a=candidate:ICEBASE 1 UDP 2130706431 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 1 UDP 2130706175 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706430 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706174 2001:db8:4321::1 PORT typ host
+SDP
+
+new_call;
+
+offer('trickle ICE test F',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio 9 RTP/AVP 8
+c=IN IP4 0.0.0.0
+a=ice-ufrag:Ci7n
+a=ice-pwd:l9QndxLG6OycZRcQe9zcT95c
+a=ice-options:trickle
+a=rtcp:9 IN IP4 0.0.0.0
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+a=ice-ufrag:ICEUFRAG
+a=ice-pwd:ICEPWD
+a=candidate:ICEBASE 1 UDP 2130706431 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 1 UDP 2130706175 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706430 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706174 2001:db8:4321::1 PORT typ host
+SDP
+
+new_call;
+
+offer('trickle ICE test G',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP6 ::
+t=0 0
+m=audio 9 RTP/AVP 8
+a=ice-ufrag:Ci7n
+a=ice-pwd:l9QndxLG6OycZRcQe9zcT95c
+a=ice-options:trickle
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP6 2001:db8:4321::1
+t=0 0
+m=audio PORT RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+a=ice-ufrag:ICEUFRAG
+a=ice-pwd:ICEPWD
+a=candidate:ICEBASE 1 UDP 2130706431 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 1 UDP 2130706175 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706430 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706174 203.0.113.1 PORT typ host
+SDP
+
+new_call;
+
+offer('trickle ICE test I',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP6 ::
+t=0 0
+m=audio 9 RTP/AVP 8
+a=ice-ufrag:Ci7n
+a=ice-pwd:l9QndxLG6OycZRcQe9zcT95c
+a=ice-options:trickle
+a=rtcp:9 IN IP4 0.0.0.0
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+c=IN IP6 2001:db8:4321::1
+t=0 0
+m=audio PORT RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+a=ice-ufrag:ICEUFRAG
+a=ice-pwd:ICEPWD
+a=candidate:ICEBASE 1 UDP 2130706431 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 1 UDP 2130706175 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706430 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706174 203.0.113.1 PORT typ host
+SDP
+
+new_call;
+
+offer('trickle ICE test J',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio 9 RTP/AVP 8
+c=IN IP6 ::
+a=ice-ufrag:Ci7n
+a=ice-pwd:l9QndxLG6OycZRcQe9zcT95c
+a=ice-options:trickle
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP6 2001:db8:4321::1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+a=ice-ufrag:ICEUFRAG
+a=ice-pwd:ICEPWD
+a=candidate:ICEBASE 1 UDP 2130706431 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 1 UDP 2130706175 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706430 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706174 203.0.113.1 PORT typ host
+SDP
+
+new_call;
+
+offer('trickle ICE test L',
+	{ }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio 9 RTP/AVP 8
+c=IN IP6 ::
+a=ice-ufrag:Ci7n
+a=ice-pwd:l9QndxLG6OycZRcQe9zcT95c
+a=ice-options:trickle
+a=rtcp:9 IN IP4 0.0.0.0
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.101.40
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP6 2001:db8:4321::1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+a=ice-ufrag:ICEUFRAG
+a=ice-pwd:ICEPWD
+a=candidate:ICEBASE 1 UDP 2130706431 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 1 UDP 2130706175 203.0.113.1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706430 2001:db8:4321::1 PORT typ host
+a=candidate:ICEBASE 2 UDP 2130706174 203.0.113.1 PORT typ host
+SDP
+
 
 new_call;