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examples:restrict-calls-to-registered-users [2011/08/19 09:01]
92.112.119.221 		examples:restrict-calls-to-registered-users [2012/03/22 13:41] (current)
80.250.1.245 removed spam
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 +====== How to restrict calls to only registered users ======
 +
 +
 +There are a couple of ways to authenticate INVITEs.
 +
 +Using membership in the grp table you can try the following:
 +
 +  if (!is_user_in("From", "active")) {
 +    exit;
 +  };
 +
 +You need to insert a username, domain and grp="active" into the grp table for the above test to pass.
 +
 +If you would like to use AVP's, the following example might work for you:
 +
 +  if (avp_db_load("$from/username", "s:active")) {
 +    if (!avp_check("s:active", "eq/y/i")) {
 +    exit;
 +    };
 +  };
 +
 +You need to insert a username, domain, attribute="active", value="y" in the usr_preferences for the above test to pass.
 +
 +Another (or additional) test would be to execute the following logic:
 +
 +  if (is_method("INVITE") && !allow_trusted()) {
 +    if (!proxy_authorize("", "subscriber")) {
 +      proxy_challenge("", "0");
 +      exit;
 +    } else if (!check_from()) {
 +      sl_send_reply("403", "Unauthorized: From username does not match digest credentials");
 +      exit;
 +    } else {
 +      append_rpid_hf();
 +    };
 +      consume_credentials();
 +  };
 +
 +It is possible to use all three methods above at the same time to provide granular control over INVITEs. 
  

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