[asterisk-bugs] [Asterisk 0013823]: Response to REGISTER is sent to wrong address when using rport

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=13823 
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Reported By:                dimas
Assigned To:                
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Project:                    Asterisk
Issue ID:                   13823
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Target Version:             1.4.26
Asterisk Version:           1.4.21.2 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2008-11-02 12:08 CST
Last Modified:              2009-05-21 22:38 CDT
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Summary:                    Response to REGISTER is sent to wrong address when
using rport
Description: 
I have client behind NAT. 
when client (10.0.0.17) sends REGISTER request, it puts rport into Via
header. check_via notices that and sets SIP_NAT_ROUTE to the &p->flags[0] -
note the log line:

Sending to 192.168.7.211 : 5079 (NAT)

however the register_verify function later does 
  ast_copy_flags(&p->flags[0], &peer->flags[0], SIP_NAT); 
effectively overwritting the value with SIP_NAT_RFC3581. And finally,
check_auth send response back to client to the wrong address which is
visible from the log line 

<--- Transmitting (no NAT) to 10.0.0.17:5079 --->

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 (0105277) a9bian (reporter) - 2009-05-21 22:38
 https://issues.asterisk.org/view.php?id=13823#c105277 
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<a9bian's .wok> 

Issue History 
Date Modified    Username       Field                    Change               
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2009-05-21 22:38 a9bian         Note Added: 0105277                          
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