i have this piece of config code: if (is_gruu()) { xlog("L_INFO", "Request-URI <$ru> IS gruu\n"); } else { xlog("L_INFO", "Request-URI <$ru> is NOT gruu\n"); } and i get this to syslog: May 28 17:53:07 siika /usr/sbin/sip-proxy[8926]: INFO: Request-URI <sip:jh@test.fi;gr=urn:uuid:f462ab09-88fe-43c6-9c9c-cb570ce6bb99> is NOT gruu is this a bug or have i misunderstood something? -- juha 4.24. is_gruu([uri]) The function returns true if the uri is GRUU ('gr' parameter is present): 1 - pub-gruu; 2 - temp-gruu. Meaning of the parameters is as follows: uri - the SIP URI to check for GRUU parameter. It is optional, when missing, the value of R-URI is used.