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MGCP_Test: Make RTP bwe/oa format conversation tests more robust 

The following testcases are carried out using two bidirectional
connections on one MGW endpoint.

MGCP_Test.TC_amr_oa_bwe_rtp_conversion
MGCP_Test.TC_amr_oa_oa_rtp_conversion
MGCP_Test.TC_amr_bwe_bwe_rtp_conversion

The test is programmed in a way that the TTCN3 side of the RTP emulation
also works in bidirectional mode. This is prone to run into a race
condition when the RX side is activated but the TX side is already
transmitting.

However, in order to test if the RTP format conversion works we do not
need to test both directions at the same time. Its perfectly fine to do
the one direction first and then do the other afterwards. Lets also add
some guard time while switching the RTP flows.

Change-Id: Idf257cfc1ab45a7f0fb6e1a2f6426f1b3145879b
This commit is contained in:
Philipp Maier 2019-10-01 13:21:28 +02:00 committed by laforge
parent cf47a920e5
commit 9ff0f8afda
1 changed files with 20 additions and 6 deletions
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26
mgw/MGCP_Test.ttcn
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@ -2012,7 +2012,7 @@ module MGCP_Test {
f_init(ep);
/* from us to MGW */
/* Connection #0 (Bidirectional) */
flow[0] := valueof(t_RtpFlow(mp_local_ip, mp_remote_ip, 112, "AMR/8000"));
/* bind local RTP emulation sockets */
flow[0].em.portnr := 10000;
@ -2023,7 +2023,7 @@ module MGCP_Test {
flow[0].fmtp := fmtp0;
f_flow_create(RTPEM[0], ep, call_id, "sendrecv", flow[0]);
/* from MGW back to us */
/* Connection #1 (Bidirectional) */
flow[1] := valueof(t_RtpFlow(mp_local_ip, mp_remote_ip, 112, "AMR/8000"));
flow[1].em.portnr := 20000;
flow[1].rtp_cfg := c_RtpemDefaultCfg;
@ -2033,17 +2033,31 @@ module MGCP_Test {
flow[1].fmtp := fmtp1;
f_flow_create(RTPEM[1], ep, call_id, "sendrecv", flow[1]);
f_rtpem_mode(RTPEM[1], RTPEM_MODE_BIDIR);
f_rtpem_mode(RTPEM[0], RTPEM_MODE_BIDIR);
/* Send RTP packets to connection #0, receive on connection #1 */
f_rtpem_mode(RTPEM[1], RTPEM_MODE_RXONLY);
f_sleep(0.5);
f_rtpem_mode(RTPEM[0], RTPEM_MODE_TXONLY);
f_sleep(1.0);
f_rtpem_mode(RTPEM[0], RTPEM_MODE_NONE);
f_sleep(0.5);
f_rtpem_mode(RTPEM[1], RTPEM_MODE_NONE);
/* Send RTP packets to connection #1, receive on connection #0 */
f_rtpem_mode(RTPEM[0], RTPEM_MODE_RXONLY);
f_sleep(0.5);
f_rtpem_mode(RTPEM[1], RTPEM_MODE_TXONLY);
f_sleep(1.0);
f_rtpem_mode(RTPEM[1], RTPEM_MODE_NONE);
f_sleep(0.5);
f_rtpem_mode(RTPEM[0], RTPEM_MODE_NONE);
/* Remove RTP flows and check statistics */
f_flow_delete(RTPEM[0]);
f_flow_delete(RTPEM[1], ep, call_id);
/* Check for errors */
stats[0] := f_rtpem_stats_get(RTPEM[0]);
stats[1] := f_rtpem_stats_get(RTPEM[1]);
f_rtpem_stats_err_check(stats[0]);
f_rtpem_stats_err_check(stats[1]);