I setup OpenSips 2.3 proxy server, so any call come on server, my script grabs sip URI from DB, and forward call to that uri. When I get value I used AVP to get value and save it in $avp(didnumber), if I use rewrite with manually specifying uri it is working, but when I grab this value from DB and than assign it, it is not working in rewriteuri() method.
$ru = "sip:"+$avp(didnumber)
if I write
rewriteuri("[$ru]")
it throws following error
ERROR:core:parse_sip_msg_uri: bad uri <[$ru>
ERROR:tm:new_t: uri invalid
ERROR:tm:t_newtran: new_t failed
I think this method does not accept normal variable so I added quotation to make it string variable, now it shows fine on log but seem I have to convert variable using AVP or transformation, I tried many syntaxes but still could not do it. Please suggest.
rewrite_uri() has been deprecated in favour of simply using $ru. Your R-URI already gets completely rewritten by this statement:
$ru = "sip:" + $avp(didnumber);
However, note that the above is incorrect, since you do not supply a "hostport" part to the uri, according to the SIP RFC 3261:
SIP-URI = "sip:" [ userinfo ] hostport
uri-parameters [ headers ]
The parser will likely report an error. There are two fixes for this:
either only rewrite the R-URI "userinfo" part, like so:
$rU = $avp(didnumber);
supply a destination hostname:
$ru = "sip:" + $avp(didnumber) + "@" + $var(destination);
Following from here, you can just t_relay() using your new R-URI.
EDIT: the OpenSIPS URI parser will actually tolerate a URI such as "sip:44776772882", but it will interpret the DID as a hostname, so the errors may start appearing later, should the script writer attempt to relay the message to the invalid "44776772882" hostname.