[asterisk-bugs] [JIRA] (ASTERISK-25478) Need configuratopm option(s) to control how res_pjsip_endpoint_identifier_user performs endpoint lookup

[mdu113 (JIRA)]

mdu113 created ASTERISK-25478:
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             Summary: Need configuratopm option(s) to control how res_pjsip_endpoint_identifier_user performs endpoint lookup
                 Key: ASTERISK-25478
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-25478
             Project: Asterisk
          Issue Type: Improvement
      Security Level: None
          Components: Resources/res_pjsip_endpoint_identifier_user
    Affects Versions: 13.6.0
         Environment: linux 64bit
kernel 3.10.17
distro slackware64 14.1
pjproject 2.4.5
asterisk 13.6.0 
            Reporter: mdu113
            Severity: Minor


Whenever sip request arrives pjsip performs the following:
 (1) First, it looks up the endpoint by user at domain
 (2) If that fails,  it grabs any domain aliases that may exist, and does
a lookup by user at domainalias
 (3) If that fails, it looks at the transports to see if they have any
domains. If so, it does a lookup by user at transportdomain
 (4) Finally, if that all fails, it does a lookup by user name portion only

There are systems where first 3 look ups are unnecessary. For example my system will match endpoints by username portion only. All other lookups will always fail. This will result in additional and unnecessary db lookups per sip request and that will become cost-prohibitive quickly with increasing number of requests.
This issue has been discussed on asterisk-dev mailing list (http://lists.digium.com/pipermail/asterisk-dev/2015-October/075129.html) and has been opened here per suggestion by Matthew Jordan.

A configuration option(s) to control/suppress unnecessary lookups is very desirable



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