Hello,

I used from kamailio with MMTel features as AS in my IMS scenario and I wanted to send UDR diameter request from AS to my HSS. According to my study I should use "diameter_request" or "diameter_request_async" in ims_diameter_server module . but some problem exists in diameter_request function which caused "json" string as input of "diameter_request" ignored and fault happened. 

I added parse and checking "json" string in diameter_request function in ims_diameter_server.c file :

      if (message) {
                if (get_str_fparam(&s_message, msg, (fparam_t*)message) < 0) {
                    LM_ERR("failed to get json string\n");
                    return -1;
                }
                LM_DBG("json %.*s\n", s_message.len, s_message.s);
        }

 also cdp_get_session function in cdp module has problem with "lock and unlock session" and   " AAASessionsLock(hash);

" doesn't work correctly.  I comment " AAASessionsLock(hash);"  and  " AAASessionsUnlock(hash);" 

 if(is_method("REGISTER"))
        {
       diameter_request("hss domain address", "16777217", "306", "{ 'avpCode':263 , ....}");
        }

this worked correctly and UDR request sent to hss .