[SR-Users] why is rtpenengine-delete deleting the whole call?

[Juha Heinanen]

in my test sip proxy parallel forks the invite to two contacts and two
rtpengine-offers are made with these kind of call-id and via-branch
params:

"call-id": "f33a7e21c57edbf3", "via-branch": "z9hG4bK79d6.d19587ffadd9f72bca61d9578eb12bd9.0"
"call-id": "f33a7e21c57edbf3", "via-branch": "z9hG4bK79d6.d19587ffadd9f72bca61d9578eb12bd9.1",

then the via-branch .0 callee answers and rtpengine-answer is sent to
with this kind of call-id and via-branch params:

"call-id": "f33a7e21c57edbf3", "via-branch": "z9hG4bK79d6.d19587ffadd9f72bca61d9578eb12bd9.0",

after that sip proxy deletes the other branch by sending
rtpengine-delete with this kind of params:

Nov 27 02:25:55 lohi rtpengine[3792]: [f33a7e21c57edbf3] Received command 'delete' from 127.0.0.1:40700
Nov 27 02:25:55 lohi rtpengine[3792]: [f33a7e21c57edbf3] Dump for 'delete' from 127.0.0.1:40700: { "call-id": "f33a7e21c57edbf3", "via-branch": "z9hG4bK79d6.d19587ffadd9f72bca61d9578eb12bd9.1", "received-from": [ "IP4", "127.0.0.1" ], "from-tag": "3322319973f3909e", "command": "delete" }

and rtpengine responds:

Nov 27 02:25:55 lohi rtpengine[3792]: [f33a7e21c57edbf3] Response dump for 'delete' to 127.0.0.1:40700: { "created": 1448583951, "last signal": 1448583955, "tags": { "3322319973f3909e": { "tag": "3322319973f3909e", "created": 1448583951, "in dialogue with": "0f6759297b8f1711", "medias": [ { "index": 1, "type": "audio", "protocol": "RTP/AVP", "streams": [ { "local port": 53864, "endpoint": { "family": "IPv4", "address": "192.98.102.10", "port": 10458 }, "advertised endpoint": { "family": "IPv4", "address": "192.98.102.10", "port": 10458 }, "last packet ...
Nov 27 02:25:55 lohi rtpengine[3792]: [f33a7e21c57edbf3] ... ": 1448583951, "flags": [ "RTP", "filled" ], "stats": { "packets": 0, "bytes": 0, "errors": 0 } }, { "local port": 53865, "endpoint": { "family": "IPv4", "address": "192.98.102.10", "port": 10459 }, "advertised endpoint": { "family": "IPv4", "address": "192.98.102.10", "port": 10459 }, "last packet": 1448583951, "flags": [ "RTCP", "filled" ], "stats": { "packets": 0, "bytes": 0, "errors": 0 } } ], "flags": [ "initialized", "send", "recv" ] } ] }, "0f6759297b8f1711": { "tag": "0f6759297b8f1711",  ...
Nov 27 02:25:55 lohi rtpengine[3792]: [f33a7e21c57edbf3] ... "via-branch": "z9hG4bK79d6.d19587ffadd9f72bca61d9578eb12bd9.0", "created": 1448583951, "in dialogue with": "3322319973f3909e", "medias": [ { "index": 1, "type": "audio", "protocol": "RTP/AVP", "streams": [ { "local port": 53844, "endpoint": { "family": "IPv4", "address": "10.0.2.15", "port": 10144 }, "advertised endpoint": { "family": "IPv4", "address": "10.0.2.15", "port": 10144 }, "last packet": 1448583951, "flags": [ "RTP", "RTCP", "filled" ], "stats": { "packets": 0, "bytes": 0, "errors": 0  ...
Nov 27 02:25:55 lohi rtpengine[3792]: [f33a7e21c57edbf3] ... } }, { "local port": 53845, "endpoint": { "family": "IPv6", "address": "::", "port": 0 }, "advertised endpoint": { "family": "IPv6", "address": "::", "port": 0 }, "last packet": 1448583951, "flags": [ "RTCP", "fallback RTCP", "filled" ], "stats": { "packets": 0, "bytes": 0, "errors": 0 } } ], "flags": [ "initialized", "send", "recv", "rtcp-mux" ] } ] } }, "totals": { "RTP": { "packets": 0, "bytes": 0, "errors": 0 }, "RTCP": { "packets": 0, "bytes": 0, "errors": 0 } }, "result": "ok" }

which then results in deletion of the whole call, i.e., also the branch
that answered.

question:  why does rtpengine not do what it is asked to do in rtpengine-delete, i,e. delete
the offer corresponding to "call-id": "f33a7e21c57edbf3", "via-branch":
"z9hG4bK79d6.d19587ffadd9f72bca61d9578eb12bd9.1"?

-- juha