From 2321ef92a3d198e0fa923af828d6c5a3bb4785cd Mon Sep 17 00:00:00 2001 From: Philipp Maier Date: Wed, 27 Jun 2018 17:52:04 +0200 Subject: MGCP_Test: add tests to verify actual RTP flows The test coverage of the RTP aspects of the MGW is currently very minima. Lets add a few more testcase to verify RTP behaves as expected in various situations. - Add testcase TC_one_crcx_receive_only_rtp: Test recvonly mode of the MGW. All packets must be absorbed by the MGW, no packets must come back. - Add testcase TC_one_crcx_loopback_rtp: Test loopback mode of the MGW. All packet sent to the MGW must come back. - Add testcase TC_two_crcx_and_rtp_bidir: We already test unidirectional transmissions. This test does the same as TC_two_crcx_and_rtp but for both directions. - Add testcase TC_two_crcx_mdcx_and_rtp: Simulate a typical behaviour of a normal call. First create two half open connections and complete the connections later using MDCX. - Add testcase TC_two_crcx_and_unsolicited_rtp: Test what happens when a RTP packets from rogue source are mixed into the RTP stream. - Add testcase TC_two_crcx_and_one_mdcx_rtp_ho: Test a typical handover situation. An existing connection is handovered to another source on one end but the old source will keep transmitting for a while. Change-Id: I556a6efff0e74aab897bd8165200eec36e46629f Closes: OS#2703 --- library/RTP_Emulation.ttcn | 49 ++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 43 insertions(+), 6 deletions(-) (limited to 'library') diff --git a/library/RTP_Emulation.ttcn b/library/RTP_Emulation.ttcn index 20e4299c..475b4785 100644 --- a/library/RTP_Emulation.ttcn +++ b/library/RTP_Emulation.ttcn @@ -188,20 +188,57 @@ function f_rtpem_stats_get(RTPEM_CTRL_PT pt, boolean rtcp := false) return Rtpem return stats; } -function f_rtpem_stats_compare(RtpemStats a, RtpemStats b) return boolean { +function f_rtpem_stats_compare_value(integer a, integer b, integer tolerance := 0) return boolean { + var integer temp; + + temp := (a - b) + if (temp < 0) { + temp := -temp; + } + + if (temp > tolerance) { + return false; + } + + return true; +} + +/* Cross-compare two rtpem-statistics. The transmission statistics on the a side + * must match the reception statistics on the other side and vice versa. The + * user may also supply a tolerance value (number of packets) when deviations + * are acceptable */ +function f_rtpem_stats_compare(RtpemStats a, RtpemStats b, integer tolerance := 0) return boolean { + var integer plen; + log("stats A: ", a); log("stats B: ", b); + log("tolerance: ", tolerance, " packets"); - if (a.num_pkts_tx != b.num_pkts_rx or - a.num_pkts_rx != b.num_pkts_tx or - a.bytes_payload_tx != b.bytes_payload_rx or - a.bytes_payload_rx != b.bytes_payload_tx) { + if (f_rtpem_stats_compare_value(a.num_pkts_tx, b.num_pkts_rx, tolerance) == false) { return false; } + + if (f_rtpem_stats_compare_value(a.num_pkts_rx, b.num_pkts_tx, tolerance) == false) { + return false; + } + + if(a.num_pkts_tx > 0) { + plen := a.bytes_payload_tx / a.num_pkts_tx; + } else { + plen := 0; + } + + if (f_rtpem_stats_compare_value(a.bytes_payload_tx, b.bytes_payload_rx, tolerance * plen) == false) { + return false; + } + + if (f_rtpem_stats_compare_value(a.bytes_payload_rx, b.bytes_payload_tx, tolerance * plen) == false) { + return false; + } + return true; } - template PDU_RTP ts_RTP(BIT32_BO_LAST ssrc, INT7b pt, LIN2_BO_LAST seq, uint32_t ts, octetstring payload, BIT1 marker := '0'B) := { version := 2, -- cgit v1.2.3