[OpenSIPS-Users] call forwarding with replace from uri

[Jesse Cloutier]

Thanks for the answer, I was not very clear in my first email though, 
sorry for that. Basically when caller A initiates a call, his $fu may 
be pulled from the db and replaced with a uac_replace_from. Then if the 
call progresses and is redirected to a new destination the call fails 
to authenticate because the new FROM URI is not in the DB. I have tried 
to restore his original FROM URI using uac_restore_from, but this 
doesnt seem to do it and if I store the original uri and call 
uac_replace_from a second time I get something like 
"sip:111 at 1.1.1.1sip:222 at 1.1.1.1"

Multumesc!

On Wed 02 Feb 2011 07:28:28 AM EST, Bogdan-Andrei Iancu wrote:
> Hi Jesse,
> 
> Lost me a bit between those pieces of script.
> 
> Anyhow, as far I understood from your problem, you want to change the 
> FROM URI in order to use the new value later in the script (in the auth 
> part). Well, this does not work - in opensips, the changes you do over 
> the message are not visible until the message is sent out. So you cannot 
> use your own changes later in script.
> 
> To avoid this issue, you can use a variable to store the "correct" value 
> of the FROM URI ($fu directly or the value from DB) - later in script, 
> use for auth (or other purposes) this variable in order to deal with the 
> FROM URI value (the right one).
> 
> Regards,
> Bogdan
> 
> Jesse Cloutier wrote:
>> Hi list,
>>
>> I having trouble with my script when trying to call forward by 
>> reseting the $ru and doing a route(1)
>>
>> My problem seems to be coming from the fact that I am changing my $fu 
>> with uac_replace_from. When I xlog the $fu right before the route() It 
>> shows the correct value (the original $fu before it was changed by 
>> uac_replace_from). But on the request to the forwarded number it tries 
>> to authenticate the user using the new value (the value that 
>> uac_replace_from put in)
>>
>> If I don't replace the $fu everything works fine.
>>
>> Thanks A lot for any help!!
>>
>> here is the relavant parts of my script:
>>
>> Replacing the uri in the original request:
>>
>> if (is_avp_set("$avp(s:uri)")) {
>> if (is_avp_set("$avp(s:fromname)")) {
>> xlog("L_INFO","Fromname set to $avp(s:fromname) and URI set to 
>> $avp(s:uri)");
>> uac_replace_from("$avp(s:fromname)","$avp(s:uri)");
>> } else {
>> uac_replace_from("","$avp(s:uri)");
>> xlog("L_INFO","Only Fromname Set");
>> }
>> }
>>
>>
>> The fowrwarding:
>>
>> if(avp_db_load("$ru","$avp(s:unavailcallfwd)")) {
>> #xlog("call forward is set to: $avp(s:unavailcallfwd)");
>> avp_pushto("$ru","$avp(s:unavailcallfwd)");
>> xlog("call forward is set to: $ru from $fu");
>>
>> route(1);
>>
>> exit;
>> }
>>
>>
>> And the proxy authorize
>>
>>
>> xlog("Checking if we should attempt authentication on $fu");
>> if (!(method=="REGISTER"))
>> {
>> #Do not authenticate calls from the gateways
>> xlog("Checking if its from a gateway");
>> if(!is_from_gw()) # This check is from the drouting module
>> {
>> xlog("Checking if it is an IP Authed IP");
>> if(!check_source_address("0", "$avp(i:9)")) #This check looks in the 
>> address table
>> {
>> xlog("Checking if it is a subscriber");
>>
>> xlog("from is $fu");
>>
>> if (!proxy_authorize("", "subscriber")) {
>> proxy_challenge("", "0");
>> xlog("Sent proxy challange to $fu");
>> exit;
>> }
>> if (!db_check_from()) {
>> sl_send_reply("403","Forbidden auth ID");
>> exit;
>> }
>>
>> }
>> }
>> }
>>
>>
>> -- 
>> Jesse Cloutier
>> Network Administrator
>> Cronomagic Canada
>> 5143411579 x210
>> jesse at cronomagic.com
>> ------------------------------------------------------------------------
>>
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