I'm looking for information on the correct way to handle calls to RTPEngine
when processing in-dialog requests. I currently have several setid's
configured for varying usages. During processing of an initial INVITE, a
determination is made as to if the call will require the use of RTPEngine, and
if so, which of the sets should be used. The following is done in code:
*
setid is assigned to AVP $avp(rtpengine_pool_num)
*
set_rtpengine_set("$avp(rtpengine_pool_num)") is called,
*
rtpengine_offer is then called.
*
Additionally, a record-route parameter of proxy_media=yes is added.
*
The flag PROXY_MEDIA is set
In the reply route, the PROXY_MEDIA flag is checked, and if set,
set_rtpengine_set("$avp(rtpengine_pool_num)") is called, followed by
rtpengine_answer.
When handling an in-dialog message my code didn't have anything to evaluate for
the setid. rtpengine_offer was just called. Looking at the debug from the
rtpengine module, I can see that the record is found in the hashtable, however
the node indicated in that result is not necessarily used - rtpengine will
select an entry from the default setid instead. From the rtpengine module
logs, IP addresses redacted:
2(9) DEBUG: {time=1744651756.968228} rtpengine [rtpengine_funcs.c:139]:
check_content_type(): type <application/sdp> found valid
2(9) DEBUG: {time=1744651756.968228} rtpengine [rtpengine.c:2249]:
build_rtpp_socks(): same rtpengines list version: 1 (1744651613)
2(9) DEBUG: {time=1744651756.968228} rtpengine [rtpengine.c:3818]:
select_rtpp_node_old(): rtpengine hash table lookup find node=udp:A.B.C.D:1234
for calllen=36 callid=ac66f56b-93f8-123e-1b99-0242ac120002 viabranch=
2(9) DEBUG: {time=1744651756.968228} rtpengine [rtpengine.c:3702]:
select_rtpp_node_new(): sum is = 210
2(9) DEBUG: {time=1744651756.968228} rtpengine [rtpengine.c:3198]:
rtpp_function_call(): proxy reply: d3:sdp288:v=0
o=FreeSWITCH 1744611570 1744611571 IN IP4 W.X.Y.Z
s=FreeSWITCH
c=IN IP4 W.X.Y.Z
My question is really: **SHOULD** rtpengine_offer (and rtpengine_manage, etc)
use the node that it finds in the hash table lookup automatically, or should I
have to explicitly set the setid? For now I've solved the problem by adding
the setid to the record-route headers so I can easily retrieve it in dialog,
but it seems that if the module finds a record for a node that there should be
some way to rely on that explicitly.
Kaufman
Senior Voice Engineer
E: [email protected]
SIP.US Client Support: 800.566.9810 | SIPTRUNK Client Support: 800.250.6510
| Flowroute Client Support: 855.356.9768
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