[OpenSIPS-Users] Invalid Contact header after b2b generates invite with Authorization header

[Grygoriy Dobrovolskyy]

Hello people, we've found some bug maybe with the following scenario:

When b2b bridge_extern generates INVITE and from another side 401 reply 
comes in, opensips makes new INVITE with Authorization header with 
broken Contact header.
While t_uac function (tm module) is processing INVITE it does not 
refresh new_cell->uac[0].extra_headers to address inside buf1 if there 
were some message changes inside route. In this case Contact header may 
be cut or broken.

Example of first INVITE with correct Contact:

INVITE sip:0970999999 at YYY.YYY.YYY.YYY SIP/2.0
Via: SIP/2.0/UDP XXX.XXX.XXX.XXX:5060;branch=z9hG4bKfcc7.d8c515f1.0
To: sip:0970999999 at YYY.YYY.YYY.YYY
From: <sip:123 at XXX.XXX.XXX.XXX>;tag=e7c478f6bb31847621ace8d23046543b
CSeq: 2 INVITE
Call-ID: B2B.147.5347903
Max-Forwards: 70
Content-Length: 0
User-Agent: OpenSIPS (1.11.3-notls (x86_64/linux))
Contact: <sip:cc at XXX.XXX.XXX.XXX:5060>


Then after adding Authorization header second INVITE goes with broken 
Contact (without first 5 symbols) :

INVITE sip:0970999999 at YYY.YYY.YYY.YYY SIP/2.0
Via: SIP/2.0/UDP XXX.XXX.XXX.XXX:5060;branch=z9hG4bK0dc7.81301005.0
To: sip:0970999999 at YYY.YYY.YYY.YYY
From: <sip:123 at XXX.XXX.XXX.XXX>;tag=e7c478f6bb31847621ace8d23046543b
CSeq: 3 INVITE
Call-ID: B2B.147.5347903
Max-Forwards: 70
Content-Length: 0
User-Agent: OpenSIPS (1.11.3-notls (x86_64/linux))
Authorization: Digest username="auth_user", realm="YYY.YYY.YYY.YYY", 
nonce="4d0dc469320266c4422eabecb853de5ded0a", 
uri="sip:0970999999 at YYY.YYY.YYY.YYY", 
response="868d4581634d6eebf47908ee0fba1339", algorithm=MD5
ct: <sip:cc at XXX.XXX.XXX.XXX:5060>

So i was wondering how can i fix that ? ;)

Thanks