help why i cant not connect?

i made a server for webrtc2sip and then use a imsdroid ,want to login the 
webrtc2sip .
but like this below: the webrtc2sip 's info

RECV:REGISTER sip:192.168.1.13 SIP/2.0
Via: SIP/2.0/UDP 
192.168.0.115:45539;branch=z9hG4bK-1422430109;rport;comp=sigcomp;sigcomp-id="urn
:uuid:d07465ce-03e9-486b-8dbc-fed014d0d739"
From: <sip:johndoe@192.168.1.13>;tag=1432153620
To: <sip:johndoe@192.168.1.13>
Contact: 
<sip:johndoe@192.168.0.115:45539;transport=udp;sigcomp-id=urn:uuid:d07465ce-03e9
-486b-8dbc-fed014d0d739>;expires=1700;+g.oma.sip-im;language="en,fr";+g.3gpp.sms
ip;+g.oma.sip-im.large-message;audio;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-applic
ation.ims.iari.gsma-vs";+g.3gpp.cs-voice
Call-ID: e9e99fca-1aac-cbc9-7160-89b97636fba2
CSeq: 1595091871 REGISTER
Content-Length: 0
Max-Forwards: 70
Authorization: Digest 
username="johndoe",realm="192.168.1.13",nonce="",uri="sip:192.168.1.13",response
=""
Allow: INVITE, ACK, CANCEL, BYE, MESSAGE, OPTIONS, NOTIFY, PRACK, UPDATE, REFER
Privacy: none
P-Access-Network-Info: ADSL;utran-cell-id-3gpp=00000000
User-Agent: IM-client/OMA1.0 android-ngn-stack/v2.586.1328 (doubango r1328 - HM 
1SW)
P-Preferred-Identity: <sip:johndoe@192.168.1.13>
Supported: path

*[DOUBANGO INFO]: Request for peer at (null):65535 cannot be delivered
*[DOUBANGO INFO]:

why， what can i do ti fix?

Original issue reported on code.google.com by yuxiangl...@163.com on 6 Aug 2015 at 12:35

chiragck9 / imsdroid

help why i cant not connect? #564