Multiple network interface does not work and others problems about go-sip-ua

[Windforce17]

The SIP Stack seem to find a wrong network interface,and write a wrong ip address to sip protocol.Because the lib create sip stack in advacnce,and then listen to a udp port.So the SipStackConfig.Host has been set a wrong address, unless you set a correct host.

[Windforce17]

SIP protocol not handle other data transform. In my case,the audio data encoded by PCMU and use RTP protocol.This information defined in sip's payload by sdp protocol:

SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.100.27:5060;branch=z9hG4bK.LXjpfN0we17IlFyjNLBbxL30NJbsuYz7
From: "nightingale" <sip:[email protected]:5060>;tag=Qp1Mmnwu
To: <sip:[email protected]>;tag=7cf111ddb4ae263d724df31f014fa639
Call-ID: COFVXP23YzwPjHNxqMsDC6TRmwxlQflc
CSeq: 1 INVITE
Contact: "Anonymous" <sip:6.6.6.6:5060>
Content-Type: application/sdp
Content-Length: 192

v=0
o=- 8395 8395 IN IP4 7.7.7.7.7
s=-
c=IN IP4 7.7.7.7.7
t=0 0
m=audio 15520 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv

the sip server(6.6.6.6) use rtp protocol and PCMU format to transform data through 7.7.7.7:15520