Hi,
I am a beginer for sip.
After reading the rfc,I have some questions.
e.g:
ua1: sip:[EMAIL PROTECTED]:5060
ua2: sip:[EMAIL PROTECTED]:5061
when ua1 call ua2,the message would be:
INVITE sip:[EMAIL PROTECTED]:5061 SIP/2.0
v:SIP/2.0/UDP 10.10.1.1
f:sip:[EMAIL PROTECTED]
t:sip:[EMAIL PROTECTED]:5060
i:[EMAIL PROTECTED]
m:[EMAIL PROTECTED]:5061
c:application/sdp
Suppose there are no proxies between them.
The message should be forworded to ua2 and ua2 should send a 180 response.
But where does the ua2 get the adress of ua1?
Via?From?Contact?
I was puzzled after reading the rfc,because it seems that all above headers is correct.
Which is the ua2's chioce?
Thanks!
luoqiang
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