diff --git a/t/Makefile b/t/Makefile
index 575c7bf51..86362dde7 100644
--- a/t/Makefile
+++ b/t/Makefile
@@ -108,7 +108,7 @@ include ../lib/common.Makefile
 	daemon-tests-measure-rtp daemon-tests-mos-legacy daemon-tests-mos-fullband daemon-tests-config-file \
 	daemon-tests-templ-def daemon-tests-templ-def-offer daemon-tests-t38 daemon-tests-evs-dtx \
 	daemon-tests-transform daemon-tests-http daemon-tests-heuristic daemon-tests-asymmetric \
-	daemon-tests-dtx-no-shift daemon-tests-rtcp daemon-tests-redis-subscribe
+	daemon-tests-dtx-no-shift daemon-tests-rtcp daemon-tests-redis-subscribe daemon-tests-rtp-ext
 
 TESTS=		test-bitstr aes-crypt aead-aes-crypt test-const_str_hash.strhash
 ifeq ($(with_transcoding),yes)
@@ -154,7 +154,7 @@ daemon-tests: daemon-tests-main daemon-tests-jb daemon-tests-pubsub daemon-tests
 	daemon-tests-sdp-manipulations daemon-tests-sdes-manipulations \
 	daemon-tests-sdp-orig-replacements daemon-tests-moh daemon-tests-evs-dtx daemon-tests-transform \
 	daemon-tests-transcode-config daemon-tests-codec-prefs daemon-tests-http daemon-tests-heuristic \
-	daemon-tests-asymmetric daemon-tests-rtcp daemon-tests-redis-subscribe
+	daemon-tests-asymmetric daemon-tests-rtcp daemon-tests-redis-subscribe daemon-tests-rtp-ext
 
 daemon-test-deps:	tests-preload.so
 	$(MAKE) -C ../daemon
@@ -280,6 +280,9 @@ daemon-tests-http:	daemon-test-deps
 daemon-tests-rtcp:	daemon-test-deps
 	./auto-test-helper "$@" perl -I../perl auto-daemon-tests-rtcp.pl
 
+daemon-tests-rtp-ext:	daemon-test-deps
+	./auto-test-helper "$@" perl -I../perl auto-daemon-tests-rtp-ext.pl
+
 test-bitstr:	test-bitstr.o
 
 test-mix-buffer:	test-mix-buffer.o $(COMMONOBJS) mix_buffer.o ssrc.o rtp.o crypto.o helpers.o \
diff --git a/t/auto-daemon-tests-rtp-ext.pl b/t/auto-daemon-tests-rtp-ext.pl
new file mode 100755
index 000000000..8c0186431
--- /dev/null
+++ b/t/auto-daemon-tests-rtp-ext.pl
@@ -0,0 +1,381 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use NGCP::Rtpengine::Test;
+use NGCP::Rtpclient::SRTP;
+use NGCP::Rtpengine::AutoTest;
+use Test::More;
+use NGCP::Rtpclient::ICE;
+use POSIX;
+use Data::Dumper;
+
+
+autotest_start(qw(--config-file=none -t -1 -i 203.0.113.1 -n 2223 -f -L 7 -E --log-level-internals=7))
+		or die;
+
+
+my ($sock_a, $sock_b, $sock_c, $sock_d, $port_a, $port_b, $ssrc, $ssrc_b, $resp,
+	$sock_ax, $sock_bx, $port_ax, $port_bx,
+	$srtp_ctx_a, $srtp_ctx_b, $srtp_ctx_a_rev, $srtp_ctx_b_rev, $ufrag_a, $ufrag_b,
+	@ret1, @ret2, @ret3, @ret4, $srtp_key_a, $srtp_key_b, $ts, $seq, $has_recv);
+
+
+
+($sock_a, $sock_ax, $sock_b, $sock_bx) = new_call(
+	[qw(198.51.100.1 7000)],
+	[qw(198.51.100.1 7001)],
+	[qw(198.51.100.3 7002)],
+	[qw(198.51.100.3 7003)],
+);
+
+($port_a, $port_ax) = offer('control', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio 7000 RTP/AVP 8
+c=IN IP4 198.51.100.1
+a=sendrecv
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+($port_b, $port_bx) = answer('control', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio 7002 RTP/AVP 8
+c=IN IP4 198.51.100.3
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+--------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+snd($sock_a, $port_b, rtp( 8, 1000, 3000+160*0, 0x1234, "\x10" . ("\x00" x 158) . "\x50"));
+rcv($sock_b, $port_a, rtpm(8, 1000, 3000+160*0, 0x1234, "\x10" . ("\x00" x 158) . "\x50"));
+snd($sock_b, $port_a, rtp( 8, 8000, 7000+160*0, 0x6543, "\x10" . ("\x00" x 158) . "\x50"));
+rcv($sock_a, $port_b, rtpm(8, 8000, 7000+160*0, 0x6543, "\x10" . ("\x00" x 158) . "\x50"));
+
+
+
+
+($sock_a, $sock_ax, $sock_b, $sock_bx) = new_call(
+	[qw(198.51.100.1 7004)],
+	[qw(198.51.100.1 7005)],
+	[qw(198.51.100.3 7006)],
+	[qw(198.51.100.3 7007)],
+);
+
+($port_a, $port_ax) = offer('unsolicited exts', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio 7004 RTP/AVP 8
+c=IN IP4 198.51.100.1
+a=sendrecv
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+($port_b, $port_bx) = answer('unsolicited exts', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio 7006 RTP/AVP 8
+c=IN IP4 198.51.100.3
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+--------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+snd($sock_a, $port_b, rtp( 8, 1000, 3000+160*0, 0x1234, "\x10" . ("\x00" x 158) . "\x50", [[1, "foo"]]));
+rcv($sock_b, $port_a, rtpm(8, 1000, 3000+160*0, 0x1234, "\x10" . ("\x00" x 158) . "\x50", [[1, "foo"]]));
+snd($sock_b, $port_a, rtp( 8, 8000, 7000+160*0, 0x6543, "\x10" . ("\x00" x 158) . "\x50", [[2, "blah"]]));
+rcv($sock_a, $port_b, rtpm(8, 8000, 7000+160*0, 0x6543, "\x10" . ("\x00" x 158) . "\x50", [[2, "blah"]]));
+
+
+
+
+($sock_a, $sock_ax, $sock_b, $sock_bx) = new_call(
+	[qw(198.51.100.1 7008)],
+	[qw(198.51.100.1 7009)],
+	[qw(198.51.100.3 7010)],
+	[qw(198.51.100.3 7011)],
+);
+
+($port_a, $port_ax) = offer('dummy extmap', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio 7008 RTP/AVP 8
+c=IN IP4 198.51.100.1
+a=sendrecv
+a=extmap:1 http://example.com/foobar
+a=extmap:2 http://example.com/quux
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=extmap:1 http://example.com/foobar
+a=extmap:2 http://example.com/quux
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+($port_b, $port_bx) = answer('dummy extmap', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio 7010 RTP/AVP 8
+c=IN IP4 198.51.100.3
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=extmap:1 http://example.com/foobar
+a=extmap:2 http://example.com/quux
+--------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=extmap:1 http://example.com/foobar
+a=extmap:2 http://example.com/quux
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+snd($sock_a, $port_b, rtp( 8, 1000, 3000+160*0, 0x1234, "\x10" . ("\x00" x 158) . "\x50", [[1, "foo"]]));
+rcv($sock_b, $port_a, rtpm(8, 1000, 3000+160*0, 0x1234, "\x10" . ("\x00" x 158) . "\x50", [[1, "foo"]]));
+snd($sock_b, $port_a, rtp( 8, 8000, 7000+160*0, 0x6543, "\x10" . ("\x00" x 158) . "\x50", [[2, "blah"]]));
+rcv($sock_a, $port_b, rtpm(8, 8000, 7000+160*0, 0x6543, "\x10" . ("\x00" x 158) . "\x50", [[2, "blah"]]));
+
+
+
+
+
+
+($sock_a, $sock_ax, $sock_b, $sock_bx) = new_call(
+	[qw(198.51.100.1 7016)],
+	[qw(198.51.100.1 7017)],
+	[qw(198.51.100.3 7018)],
+	[qw(198.51.100.3 7019)],
+);
+
+($port_a, $port_ax) = offer('control w tc', { codec => { transcode => ['PCMU'] } }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio 7016 RTP/AVP 8
+c=IN IP4 198.51.100.1
+a=sendrecv
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8 0
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=rtpmap:0 PCMU/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+($port_b, $port_bx) = answer('control w tc', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio 7018 RTP/AVP 0
+c=IN IP4 198.51.100.3
+a=sendrecv
+--------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+snd($sock_a, $port_b, rtp( 8, 1000, 3000+160*0, 0x1234, "\x10" . ("\x00" x 158) . "\x50"));
+rcv($sock_b, $port_a, rtpm(0, 1000, 3000+160*0, 0x1234, "\x39" . ("\x29" x 158) . "\x74"));
+snd($sock_b, $port_a, rtp( 0, 8000, 7000+160*0, 0x6543, "\x39" . ("\x29" x 158) . "\x74"));
+rcv($sock_a, $port_b, rtpm(8, 8000, 7000+160*0, 0x6543, "\x10" . ("\x00" x 158) . "\x50"));
+
+
+
+
+
+($sock_a, $sock_ax, $sock_b, $sock_bx) = new_call(
+	[qw(198.51.100.1 7020)],
+	[qw(198.51.100.1 7021)],
+	[qw(198.51.100.3 7022)],
+	[qw(198.51.100.3 7023)],
+);
+
+($port_a, $port_ax) = offer('unsolicited exts w tc', { codec => { transcode => ['PCMU'] } }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio 7020 RTP/AVP 8
+c=IN IP4 198.51.100.1
+a=sendrecv
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8 0
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=rtpmap:0 PCMU/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+($port_b, $port_bx) = answer('unsolicited exts w tc', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio 7022 RTP/AVP 0
+c=IN IP4 198.51.100.3
+a=sendrecv
+--------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+snd($sock_a, $port_b, rtp( 8, 1000, 3000+160*0, 0x1234, "\x10" . ("\x00" x 158) . "\x50", [[1, "foo"]]));
+rcv($sock_b, $port_a, rtpm(0, 1000, 3000+160*0, 0x1234, "\x39" . ("\x29" x 158) . "\x74"));
+snd($sock_b, $port_a, rtp( 0, 8000, 7000+160*0, 0x6543, "\x39" . ("\x29" x 158) . "\x74", [[2, "blah"]]));
+rcv($sock_a, $port_b, rtpm(8, 8000, 7000+160*0, 0x6543, "\x10" . ("\x00" x 158) . "\x50"));
+
+
+
+
+($sock_a, $sock_ax, $sock_b, $sock_bx) = new_call(
+	[qw(198.51.100.1 7024)],
+	[qw(198.51.100.1 7025)],
+	[qw(198.51.100.3 7026)],
+	[qw(198.51.100.3 7027)],
+);
+
+($port_a, $port_ax) = offer('dummy extmap w tc', { codec => { transcode => ['PCMU'] } }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio 7024 RTP/AVP 8
+c=IN IP4 198.51.100.1
+a=sendrecv
+a=extmap:1 http://example.com/foobar
+a=extmap:2 http://example.com/quux
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8 0
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=rtpmap:0 PCMU/8000
+a=extmap:1 http://example.com/foobar
+a=extmap:2 http://example.com/quux
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+($port_b, $port_bx) = answer('dummy extmap w tc', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio 7026 RTP/AVP 0
+c=IN IP4 198.51.100.3
+a=sendrecv
+a=extmap:1 http://example.com/foobar
+a=extmap:2 http://example.com/quux
+--------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=extmap:1 http://example.com/foobar
+a=extmap:2 http://example.com/quux
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+snd($sock_a, $port_b, rtp( 8, 1000, 3000+160*0, 0x1234, "\x10" . ("\x00" x 158) . "\x50", [[1, "foo"]]));
+rcv($sock_b, $port_a, rtpm(0, 1000, 3000+160*0, 0x1234, "\x39" . ("\x29" x 158) . "\x74"));
+snd($sock_b, $port_a, rtp( 0, 8000, 7000+160*0, 0x6543, "\x39" . ("\x29" x 158) . "\x74", [[2, "blah"]]));
+rcv($sock_a, $port_b, rtpm(8, 8000, 7000+160*0, 0x6543, "\x10" . ("\x00" x 158) . "\x50"));
+
+
+
+
+#done_testing;NGCP::Rtpengine::AutoTest::terminate('f00');exit;
+done_testing();