add X-Osmo-IGN MGCP header to ignore CallID
The format is
CRCX ...
C: ...
M: ...
X-Osmo-IGN: C
So far the only ignorable element is C, i.e. the CallID. Any other items may be
added in the future.
(I initially intended to also add '@' to ignore the endpoint name's domain
part, but in the osmo-mgw code base the domain part is verified long before any
additional headers are even parsed, so sparing that refactoring for now.)
The intention is that osmo-bsc will issue "X-Osmo-IGN: C" for all SCCPlite
calls, because we are unable to retrieve the CallID that the MSC sends to
osmo-mgw for the network side of the endpoint.
Testing with a specific SCCPlite MSC, I actually observe that all CallIDs are
1, even for concurrent calls. So, an alternative hacky solution would have been
to always pass CallID == 1 for SCCPlite connections from osmo-bsc.
Related: I257ad574d8060fef19afce9798bd8a5a7f8c99fe (osmo-bsc)
Change-Id: Id7ae275ffde8ea9389270cfe3db087ee8db00b51
diff --git a/tests/mgcp/mgcp_test.c b/tests/mgcp/mgcp_test.c
index ea79485..2d1e28a 100644
--- a/tests/mgcp/mgcp_test.c
+++ b/tests/mgcp/mgcp_test.c
@@ -309,6 +309,32 @@
"a=rtpmap:97 GSM-EFR/8000\r\n" \
"a=ptime:20\r\n"
+#define CRCX_X_OSMO_IGN \
+ "CRCX 2 1@mgw MGCP 1.0\r\n" \
+ "M: recvonly\r\n" \
+ "C: 2\r\n" \
+ "L: p:20\r\n" \
+ "X-Osmo-IGN: C\r\n" \
+ "\r\n" \
+ "v=0\r\n" \
+ "c=IN IP4 123.12.12.123\r\n" \
+ "m=audio 5904 RTP/AVP 97\r\n" \
+ "a=rtpmap:97 GSM-EFR/8000\r\n" \
+ "a=ptime:40\r\n"
+
+#define CRCX_X_OSMO_IGN_RET \
+ "200 2 OK\r\n" \
+ "I: %s\r\n" \
+ "\r\n" \
+ "v=0\r\n" \
+ "o=- %s 23 IN IP4 0.0.0.0\r\n" \
+ "s=-\r\n" \
+ "c=IN IP4 0.0.0.0\r\n" \
+ "t=0 0\r\n" \
+ "m=audio 16010 RTP/AVP 97\r\n" \
+ "a=rtpmap:97 GSM-EFR/8000\r\n" \
+ "a=ptime:40\r\n"
+
#define DLCX \
"DLCX 7 1@mgw MGCP 1.0\r\n" \
"I: %s\r\n" \
@@ -482,6 +508,7 @@
"a=fmtp:126 0/1/2"},
{"DLCX", DLCX, DLCX_RET, PTYPE_IGNORE,.extra_fmtp = "a=fmtp:126 0/1/2"},
{"CRCX", CRCX_NO_LCO_NO_SDP, CRCX_NO_LCO_NO_SDP_RET, 97},
+ {"CRCX", CRCX_X_OSMO_IGN, CRCX_X_OSMO_IGN_RET, 97},
};
static const struct mgcp_test retransmit[] = {