Hello,
On 11/27/12 4:38 PM, Daniel Tryba wrote:
I'm trying to get the MWI indicator on endpoints to work by redirecting the SUBSCRIBE to the voicemail server (asterisk) using usc_replace_(to|from). This works fine for the initial request but the next subscribe will fail since the to/from don't get rewritten, which is indicated by the error: ERROR: uac [replace.c:250]: decline FROM replacing in sequential request in auto mode (has TO tag)
in auto mode, the From/To will be updated automatically for requests within dialog. So just relay the subscribe if it has To tag, don't call the function to update the header.
Cheers, Daniel
This occurs when the modparam "uac","restore_mode" is manual or auto. When set to none the redirect will be correct but all responses have to be rewritten manually (I'm a beginner and I don't want to do this just yet). And since uac has knowledge about this having being rewritten, sending the original from/to looks like like a bug to me (more probable a misconfiguration/omission of something crucial withing dialog responses :)
Changes to the (default debian package) config, in route route[PRESENCE] in if(is_method("SUBSCRIBE"))
if( is_method("SUBSCRIBE")) { if(search_hf("Event", "message-summary", "a")) { if (!www_authenticate("$fd", "subscriber")) { www_challenge("$fd", "1"); exit; }
if(avp_db_query("SELECT value FROM usr_preferences WHERE username='$au'and attribute='voicemail' ORDER BY value limit 1")) { $avp(voicemail)=$avp(i:1);
$avp(subscrfrom)=$fu; avp_subst("$avp(subscrfrom)", "/sip:.*@/sip:$avp(voicemail)@/"); uac_replace_from("$avp(subscrfrom)"); uac_replace_to("","sip:$avp(voicemail)@$sel(cfg_get.voicemail.srv_ip):$sel(cfg_get.voicemail.srv_port)"); remove_hf("Authorization");
$ru = "sip:" + $avp(voicemail) + "@" + $sel(cfg_get.voicemail.srv_ip) +":" + $sel(cfg_get.voicemail.srv_port); route(RELAY); } } else { handle_subscribe(); t_release(); } } exit;
192.168.34.226 is the sip device, 192.168.32.40 kamailio, 192.168.32.41 the voicemailserver.
Initial request: U 192.168.34.226:5852 -> 192.168.32.40:5060 SUBSCRIBE sip:grandstream@sip.local SIP/2.0. From: "Daniel" sip:grandstream@sip.local;tag=67d8f67065827fe2. To: sip:grandstream@sip.local.
Gets rewritten to: U 192.168.32.40:5060 -> 192.168.32.41:5060 SUBSCRIBE sip:0880100782@192.168.32.41:5060 SIP/2.0. From: "Daniel" sip:0880100782@sip.local;tag=67d8f67065827fe2. To: sip:0880100782@192.168.32.41:5060.
The response gets relayed to the endpoint and MWI will light up since there is a message.
But next subscribe update from the endpoint triggers the "decline FROM replacing in sequential request" error and thus the subscribe send to voicemail is the original to/from: U 192.168.32.40:5060 -> 192.168.32.41:5060 SUBSCRIBE sip:0880100782@192.168.32.41:5060 SIP/2.0. From: "Daniel" sip:grandstream@sip.local;tag=67d8f67065827fe2. To: sip:grandstream@sip.local;tag=as324de8f3.
Resulting in a 404 since the to/from are not the real peername on the voicemail server. How do I force Kamailio to rewrite the from/to without doing this manually for a requests/responses (restore_mode none)? The easy way out of this problem would be to have a 1 to 1 relation for the Kamailio subscribers and voicemail peers. But uac_replace should work (somehow).
Attached is a full capture of the subscribe/notify. Running 3.3.2+squeeze from http://deb.kamailio.org/kamailio/. Machine is also running topoh module (192.168.0.1).
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