Hi all!
I have a fairly simple scenario which I use for automatic testing.
----------> INVITE
<---------- 180
<---------- 200
----------> ACK
----------> INVITE
<---------- 200
----------> ACK
----------> BYE
----------> ACK
<---------- 200
[ 4000ms] Pause
The sipp is run i.e. "sipp -rsa 127.0.0.1:5070 127.0.0.1 -m 1 -sf
my_sipp_scenario.xml" for each separate test and sipp's return value is
checked for zero.
The problem is, that sometimes (probably due UDP protocol?) sipp
receives the second INVITE before ACK:
----------> INVITE
<---------- 180
<---------- 200
----------> INVITE (WILL COMPLAIN AS UNEXPECTED SIP MESSAGE ERROR!)
----------> ACK
...
and marks the call as failed, but I think that this is still a valid
call (since both INVITE and ACK are send). The question is, how can I
solve this issue, so both sip flows will be valid?
The scenario (my_sipp_scenario.xml):
<scenario name="Test">
<recv request="INVITE" crlf="true">
</recv>
<send>
<![CDATA[
SIP/2.0 180 Ringing
[last_Via:]
[last_From:]
[last_To:];tag=[pid]SIPpTag01[call_number]
[last_Call-ID:]
[last_CSeq:]
Contact: <sip:[local_ip]:[local_port];transport=[transport]>
Content-Length: 0
]]>
</send>
<send retrans="500">
<![CDATA[
SIP/2.0 200 OK
[last_Via:]
[last_From:]
[last_To:];tag=[pid]SIPpTag01[call_number]
[last_Call-ID:]
[last_CSeq:]
Contact: <sip:[local_ip]:[local_port];transport=[transport]>
Content-Type: application/sdp
Content-Length: [len]
v=0
o=user1 53655765 2353687637 IN IP[local_ip_type] [local_ip]
s=-
c=IN IP[media_ip_type] [media_ip]
t=0 0
m=audio [media_port] RTP/AVP 0
a=rtpmap:0 PCMU/8000
]]>
</send>
<recv request="ACK" optional="true">
</recv>
<recv request="INVITE" crlf="true" />
<send retrans="500">
<![CDATA[
SIP/2.0 200 OK
[last_Via:]
[last_From:]
[last_To:];tag=[pid]SIPpTag01[call_number]
[last_Call-ID:]
[last_CSeq:]
Contact: <sip:[local_ip]:[local_port];transport=[transport]>
Content-Type: application/sdp
Content-Length: [len]
v=0
o=user1 53655765 2353687637 IN IP[local_ip_type] [local_ip]
s=-
c=IN IP[media_ip_type] [media_ip]
t=0 0
m=audio [media_port] RTP/AVP 0
a=rtpmap:0 PCMU/8000
]]>
</send>
....
Tnx in advance,
Boris
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