[asterisk-bugs] [JIRA] (ASTERISK-26580) [patch] Error during LDAP modify action when user unregisters

[Nicholas John Koch (JIRA)]

Nicholas John Koch created ASTERISK-26580:
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             Summary: [patch] Error during LDAP modify action when user unregisters
                 Key: ASTERISK-26580
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26580
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Resources/res_config_ldap
    Affects Versions: 11.24.1
         Environment: 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u1 (2016-09-03) x86_64 GNU/Linux
slapd 2.4.40+dfsg-1+deb8u2
            Reporter: Nicholas John Koch
            Severity: Minor


When an account has been looked up from the LDAP directory and activated some values within the LDAP object (AsteriskSIPUser) are updated.
In this special case we are looking at _AstAccountFullContact_. When this account now unregisters the LDAP object will be updated.
During this process some attributes get deleted. The bug is that the first attribute in the list is trying to be modified without a value but it should be deleted instead.
Wiresharking the issue showed that the LDAP modification command has an empty value which is in terms of the LDAP syntax a fault.
Hence this modification command must be a deletion.
The patch checks if the first new value ist empty (mostly _AstAccountFullContact_) and therefore inserts a deletion command rather than a modification command. A similar
procedure is already done some lines below but has not been implemented to the first name/value pair.



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