[asterisk-bugs] [Asterisk 0017265]: NTT Japan will ignore SIP packets with ; received= set in Via SIP header

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=17265 
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Reported By:                MagicalTux
Assigned To:                
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Project:                    Asterisk
Issue ID:                   17265
Category:                   Channels/chan_sip/Interoperability
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.6.2.6 
JIRA:                       SWP-1396 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-04-29 17:57 CDT
Last Modified:              2010-05-11 10:47 CDT
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Summary:                    NTT Japan will ignore SIP packets with ;received=
set in Via SIP header
Description: 
Asterisk always sets ;received= header when reproducing a Via: header in
copy_via_headers() (near line 9099).
The source says "We should *always* add a received to the topmost via"
without giving more informations. I know for a fact that NTT Japan does not
like this in its SIP session, and will discard packets containing
;received=.

The original one-line-patch for Asterisk 1.2 was proposed on japanese
voip-info. I had to adapt the patch a bit to make it compatible with
Asterisk 1.6 and it indeed helps a lot (without it, asterisk complains it
could not transmit a critical packet when an incoming call is received -
outgoing calls not tried). I confirm that with this patch incoming calls
are working.

Reference:
http://voip-info.jp/index.php/%E3%81%B2%E3%81%8B%E3%82%8A%E9%9B%BB%E8%A9%B1_%E3%83%97%E3%83%AD%E3%83%88%E3%82%B3%E3%83%AB

Basically the patch makes copy_via_headers() think the first Via: header
is already passed so it won't add ;received= if nat=never is set.

While I'm not sure this should be implemented for nat=never (I'm not fully
aware of what this ;received= info does, except making things go wrong in
my case) I believe there should at least be a way to avoid it (maybe a
nat=never,noreceived ?).
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 (0121707) lmadsen (administrator) - 2010-05-11 10:47
 https://issues.asterisk.org/view.php?id=17265#c121707 
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Note: there is nothing we can do here without a SIP trace. Our policy is to
close issues that do not provide the required information to be moved
forward within about 10 business days. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-05-11 10:47 lmadsen        Note Added: 0121707                          
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