Differences

This shows you the differences between two versions of the page.

--- install:upgrade:4.0.x-to-4.1.0 [2013/10/30 07:59] – [Configuration File Language] miconda
+++ install:upgrade:4.0.x-to-4.1.0 [2013/12/06 10:25] (current) – [Behaviour] miconda
@@ Line 28: / Line 28: @@
 ALTER TABLE dbaliases ADD INDEX alias_idx (alias_username,alias_domain);
 ALTER TABLE dbaliases ADD INDEX alias_user_idx (alias_username);
+INSERT INTO version (table_name, table_version) values ('acc_cdrs','1');
 CREATE TABLE acc_cdrs (
   id int(10) unsigned NOT NULL AUTO_INCREMENT,
@@ Line 37: / Line 39: @@
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+INSERT INTO version (table_name, table_version) values ('mohqcalls','1');
 CREATE TABLE mohqcalls (
   id int(10) unsigned NOT NULL AUTO_INCREMENT,
@@ Line 49: / Line 52: @@
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+INSERT INTO version (table_name, table_version) values ('mohqueues','1');
 CREATE TABLE mohqueues (
   id int(10) unsigned NOT NULL AUTO_INCREMENT,
@@ Line 61: / Line 65: @@
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+INSERT INTO version (table_name, table_version) values ('rtpproxy','1');
+CREATE TABLE rtpproxy (
+    id INT(10) UNSIGNED AUTO_INCREMENT PRIMARY KEY NOT NULL,
+    setid VARCHAR(32) DEFAULT 00 NOT NULL,
+    url VARCHAR(64) DEFAULT '' NOT NULL,
+    flags INT DEFAULT 0 NOT NULL,
+    weight INT DEFAULT 1 NOT NULL,
+    description VARCHAR(64) DEFAULT '' NOT NULL
+);
 </code>
@@ Line 79: / Line 92: @@
 ALTER TABLE dialplan ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
 ALTER TABLE dispatcher ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
-ALTER TABLE domain ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
+ALTER TABLE `domain` ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
 ALTER TABLE domain_attrs ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
 ALTER TABLE domain_name ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
@@ Line 109: / Line 122: @@
 ALTER TABLE speed_dial ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
 ALTER TABLE subscriber ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
-ALTER TABLE trusted ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
+ALTER TABLE `trusted` ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
 ALTER TABLE uacreg ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
 ALTER TABLE uid_credentials ENGINE=InnoDB DEFAULT CHARSET=latin1; # was ENGINE=MyISAM DEFAULT CHARSET=latin1
@@ Line 129: / Line 142: @@
 ==== Core Parameters ====
-* syn_branch has been removed - core acts now always as syn_branch=0 - the Via header branch value is computed based on transaction attributes
+  * **syn_branch** has been removed - core acts now always as syn_branch=0 - the Via header branch value is computed based on transaction attributes
+  * **dns_naptr_ignore_rfc** has been added. Specifies if the Order field in a NAPTR record should be respected. Old code, and still default, is to ignore.
+==== Behaviour ====
+=== Comparison with $null ===
+In short
+  * now: if($var(a)==$null) is always false
+  * previous: if($var(a)==$null) was true if $var(a) had the value 0
+**//Details//**
+**$null** is a special variable that was meant to test if a variable is defined or not (exists or not). It was introduced during Kamailio 1.x series (OpenSER at that time).
+For example:
+<code c>
+if($avp(x)==$null)
+</code>
+Should return true if there was no value assigned to $avp(x).
+However, some variables are defined always (eventually initialized to 0), such as $var(a) or $shv(b).
+Starting with v3.0.0 when the core from Kamailio point of view was refactored, as part of integration with SER, the comparison with $null mistakenly became the same as comparison with integer 0 (zero).
+Some of the comparisons kept working, but some gave wrong result:
+<code c>
+$avp(x)=0;
+if($avp(x)==$null)
+</code>
+was true, but actually $avp(x) was defined, having value 0.
+Issue was reported on:
+  * https://sip-router.org/tracker/index.php?do=details&task_id=358&project=1
+**//Solution//**
+Don't compare $var(...) and $shv(...) with $null, they are always defined and initialized to 0. You can eventually compare them with 0 (instead of $null).