pespin has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/26860 )

Change subject: mgw: Introduce test TC_two_crcx_mdcx_and_iuup_rtp ......................................................................

mgw: Introduce test TC_two_crcx_mdcx_and_iuup_rtp

This test validates we can connect 3G to 2G AMR calls fine.

Change-Id: I3627711d80c5e42d56e478c1c4ff3fb5b27adfdf --- M mgw/MGCP_Test.ttcn 1 file changed, 122 insertions(+), 1 deletion(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/60/26860/1

diff --git a/mgw/MGCP_Test.ttcn b/mgw/MGCP_Test.ttcn index e1d713e..9defea7 100644 --- a/mgw/MGCP_Test.ttcn +++ b/mgw/MGCP_Test.ttcn @@ -2463,7 +2463,7 @@ setverdict(pass); }

- /* create two local RTP emulations and pass data in both directions */ + /* create two local RTP+IuUP emulations and pass data in both directions */ function f_tc_two_crcx_mdcx_and_iuup(charstring local_ip_a, charstring remote_ip_a, charstring local_ip_b, charstring remote_ip_b) runs on dummy_CT { var RtpFlowData flow[2]; @@ -2580,6 +2580,126 @@ mp_local_ipv4, mp_remote_ipv4); }

+ /* create two local emulations (1 RTP, 1 RTP+IuUP) and pass data in both directions */ + function f_tc_two_crcx_mdcx_and_iuup_rtp(charstring local_ip_a, charstring remote_ip_a, + charstring local_ip_b, charstring remote_ip_b) runs on dummy_CT { + var RtpFlowData flow[2]; + var RtpemStats stats[2]; + var MgcpResponse resp; + var MgcpEndpoint ep := c_mgw_ep_rtpbridge & "2@" & c_mgw_domain; + var MgcpCallId call_id := '1227'H; + var integer num_pkts_tx[2]; + var integer temp; + + f_init(ep); + + /* Create the first connection in receive only mode (RNC side, IuUP-Init active) */ + flow[0] := valueof(t_RtpFlow(local_ip_a, remote_ip_a, 96, "VND.3GPP.IUFP/16000")); + flow[0].em.portnr := 10000; + flow[0].rtp_cfg := c_RtpemDefaultCfg; + flow[0].rtp_cfg.tx_payload_type := flow[0].pt; + flow[0].rtp_cfg.tx_fixed_payload := '4f28959ffeb80181f5c4e83d176c897b4a4e333298333419a493ca63ded6e0'O; + flow[0].rtp_cfg.rx_fixed_payload := '08556d944c71a1a081e7ead204244480000ecd82b81118000097c4794e7740'O; /* flow[1].rtp_cfg.tx_fixed_payload converted AMR-BE-RTP->AMR-IUUP*/ + flow[0].rtp_cfg.iuup_mode := true; + flow[0].rtp_cfg.iuup_tx_init := true; + f_flow_create(RTPEM[0], ep, call_id, "recvonly", flow[0], true); + f_rtpem_mode(RTPEM[0], RTPEM_MODE_RXONLY); + + /* Create the second connection. This connection will be also + * in receive only mode (CN side, regular RTP) */ + flow[1] := valueof(t_RtpFlow(local_ip_b, remote_ip_b, 112, "AMR/8000")); + flow[1].em.portnr := 20000; + flow[1].rtp_cfg := c_RtpemDefaultCfg; + flow[1].rtp_cfg.tx_payload_type := flow[1].pt; + flow[1].rtp_cfg.tx_fixed_payload := '0382155b65131c68682079fab4810911200003b360ae0446000025f11e539dd0'O; + flow[1].rtp_cfg.rx_fixed_payload := 'f3d3ca2567ffae00607d713a0f45db225ed2938ccca60ccd066924f298f7b5b8'O; /* flow[0].rtp_cfg.tx_fixed_payload converted AMR-IuUP->AMR-BE-RTP*/ + flow[1].rtp_cfg.iuup_mode := false; + f_flow_create(RTPEM[1], ep, call_id, "recvonly", flow[1], true); + f_rtpem_mode(RTPEM[1], RTPEM_MODE_RXONLY); + + /* The first leg starts transmitting */ + f_rtpem_mode(RTPEM[0], RTPEM_MODE_TXONLY); + f_sleep(0.5); + stats[0] := f_rtpem_stats_get(RTPEM[0]); + if (stats[0].num_pkts_rx_err_disabled != 0) { + setverdict(fail, "received packets from MGW on recvonly connection 0"); + mtc.stop; + } + stats[1] := f_rtpem_stats_get(RTPEM[1]); + if (stats[1].num_pkts_rx_err_disabled != 0) { + setverdict(fail, "received packets from MGW on recvonly connection 1"); + mtc.stop; + } + + /* The second leg starts transmitting a little later */ + f_rtpem_mode(RTPEM[1], RTPEM_MODE_TXONLY); + f_sleep(1.0); + stats[0] := f_rtpem_stats_get(RTPEM[0]); + if (stats[0].num_pkts_rx_err_disabled != 0) { + setverdict(fail, "received packets from MGW on recvonly connection 0"); + mtc.stop; + } + stats[1] := f_rtpem_stats_get(RTPEM[1]); + if (stats[1].num_pkts_rx_err_disabled != 0) { + setverdict(fail, "received packets from MGW on recvonly connection 1"); + mtc.stop; + } + + /* The first leg will now be switched into bidirectional + * mode, but we do not expect any data coming back yet. */ + f_rtpem_mode(RTPEM[0], RTPEM_MODE_BIDIR); + stats[1] := f_rtpem_stats_get(RTPEM[1]); + num_pkts_tx[1] := stats[1].num_pkts_tx; + f_flow_modify(RTPEM[0], ep, call_id, "sendrecv", flow[0]); + f_sleep(0.5); + stats[0] := f_rtpem_stats_get(RTPEM[0]); + if (stats[0].num_pkts_rx_err_disabled != 0) { + setverdict(fail, "received packets from MGW on recvonly connection 0"); + mtc.stop; + } + stats[1] := f_rtpem_stats_get(RTPEM[1]); + if (stats[1].num_pkts_rx_err_disabled != 0) { + setverdict(fail, "received packets from MGW on recvonly connection 1"); + mtc.stop; + } + + /* When the second leg is switched into bidirectional mode + * as well, then the MGW will connect the two together and + * we should see RTP streams passing through from both ends. */ + f_rtpem_mode(RTPEM[1], RTPEM_MODE_BIDIR); + stats[0] := f_rtpem_stats_get(RTPEM[0]); + num_pkts_tx[0] := stats[0].num_pkts_tx; + f_flow_modify(RTPEM[1], ep, call_id, "sendrecv", flow[1]); + f_sleep(2.0); + + stats[0] := f_rtpem_stats_get(RTPEM[0]); + stats[1] := f_rtpem_stats_get(RTPEM[1]); + + temp := stats[0].num_pkts_tx - num_pkts_tx[0] - stats[1].num_pkts_rx; + if (temp > 3 or temp < -3) { + setverdict(fail, "number of packets not within normal parameters:", temp); + mtc.stop; + } + + temp := stats[1].num_pkts_tx - num_pkts_tx[1] - stats[0].num_pkts_rx; + if (temp > 3 or temp < -3) { + setverdict(fail, "number of packets not within normal parameters:", temp); + mtc.stop; + } + + f_rtpem_stats_err_check(stats[0]); + f_rtpem_stats_err_check(stats[1]); + + /* Tear down */ + f_flow_delete(RTPEM[0]); + f_flow_delete(RTPEM[1], ep, call_id); + setverdict(pass); + } + testcase TC_two_crcx_mdcx_and_iuup_rtp() runs on dummy_CT { + f_tc_two_crcx_mdcx_and_iuup_rtp(mp_local_ipv4, mp_remote_ipv4, + mp_local_ipv4, mp_remote_ipv4); + } + control { execute(TC_selftest()); execute(TC_crcx()); @@ -2655,6 +2775,7 @@ execute(TC_two_crcx_mdcx_and_rtp_osmux_ipv6_ipv4());

execute(TC_two_crcx_mdcx_and_iuup()); + execute(TC_two_crcx_mdcx_and_iuup_rtp());

/* Note: This testcase will trigger an OSMO_ASSERT() bug in * older versions of osmo-mgw. This eventually leads into