BTS_Tests: workaround addr='0.0.0.0' in f_rtpem_activate()
If a CRXC message contains optional remote IP and port IEs, the
CRCX ACK received from the BTS is expected to contain its listen
address and port. In some cases osmo-bts may indicate nonsense
addr='0.0.0.0', and indeed the RTP_Emulation component is not gonna
like this. This makes both BTS_Tests.TC_speech_rtp_tch[fh] test
cases fail whenever executed in Docker:
Connection refused (unexpected)
Let's work this around by sending the remote IP and port IEs in
additional MDCX message and omitting them in CRCX. This mimics
osmo-bsc's behavior and makes both test cases pass.
Change-Id: I03453e72f62819989dfe6aa12d8bd889fced1046
Related: OS#5242
diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 06fe43b..c2de538 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -2532,16 +2532,28 @@
var PortNumber rtpem_bind_port := mp_rtpem_bind_port;
f_rtpem_bind(RTPEM_CTRL, mp_rtpem_bind_ip, rtpem_bind_port);
- /* Step 3: send CRCX with the configured address/port to the IUT */
- var RSL_Message rsl_pdu := f_rsl_transceive_ret(
- ts_RSL_IPA_CRCX(g_chan_nr, f_inet_addr(mp_rtpem_bind_ip), rtpem_bind_port),
+ /* Step 3a: send CRCX to create an RTP connection at the IUT */
+ var RSL_Message crcx_ack := f_rsl_transceive_ret(
+ /* FIXME (OS#5242): do not include Remote IP/Port IEs because
+ * osmo-bts would respond with nonsense listen addr='0.0.0.0'. */
+ ts_RSL_IPA_CRCX(g_chan_nr, omit, omit),
tr_RSL_IPA_CRCX_ACK(g_chan_nr, ?, ?, ?),
"IPA CRCX ACK");
+ var uint16_t conn_id := crcx_ack.ies[1].body.ipa_conn_id;
- /* Step 4: connect to the IUT's address/port parsed from CRCX ACK */
- var HostName local_addr := f_inet_ntoa(rsl_pdu.ies[2].body.ipa_local_ip);
- var PortNumber local_port := rsl_pdu.ies[3].body.ipa_local_port;
- f_rtpem_connect(RTPEM_CTRL, local_addr, local_port);
+ /* Step 3b: send MDCX with the configured address/port to the IUT */
+ var RSL_Message mdcx_ack := f_rsl_transceive_ret(
+ ts_RSL_IPA_MDCX(g_chan_nr, conn_id,
+ remote_ip := f_inet_addr(mp_rtpem_bind_ip),
+ remote_port := rtpem_bind_port,
+ rtp_pt2 := 0),
+ tr_RSL_IPA_MDCX_ACK(g_chan_nr, conn_id, ?, ?, ?),
+ "IPA MDCX ACK");
+
+ /* Step 4: connect to the IUT's address/port parsed from MDCX ACK */
+ var HostName bts_bind_ip := f_inet_ntoa(mdcx_ack.ies[2].body.ipa_local_ip);
+ var PortNumber bts_bind_port := mdcx_ack.ies[3].body.ipa_local_port;
+ f_rtpem_connect(RTPEM_CTRL, bts_bind_ip, bts_bind_port);
/* Step 5: set the given RTP emulation mode */
f_rtpem_mode(RTPEM_CTRL, mode);