[asterisk-bugs] [JIRA] (ASTERISK-26988) user_eq_phone adds double user=phone parameters to URIs on re-Invite

[dtryba (JIRA)]

dtryba created ASTERISK-26988:
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             Summary: user_eq_phone adds double user=phone parameters to URIs on re-Invite
                 Key: ASTERISK-26988
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26988
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: pjproject/pjsip
    Affects Versions: 13.14.1
         Environment: Debian/stretch with repository supplied Asterisk 13.14.1~dfsg-1
There are no updates/patches for user_eq_phone either Debian specific or from 13.41.1 to 13.15 as far as I can see.
            Reporter: dtryba
            Severity: Minor


Asterisk in a setup as proxy/sbc between customer and upstream provider, where upstream demands the use of user=phone for URIs containing phonenumbers. Only the endpoint definitions for upstream contain the "user_eq_phone = yes" option.

INVITE from upstream to Asterisk. R-URI/To/From/PAI containt the user=phone params. INVITE from Asterisk to customer, the user=phone gets stripped from all URIs. The 1xx/200OK from customer lack user=phone, but gets added by Asterisk to upstream. So far so good.

The customer endpoint is a fax, that re-INVITEs for t38. The re-INVITE lack user=phone. Asterisk adds "user=phone;user=phone" to relevant URIs
Upstream provider answers with a "400 Bad Request" and the connection is terminated (by both upstream as Asterisk). 



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