[OpenSIPS-Users] Problem with double field P-Asserted-Identity

[mmarzuola at interfree.it]

Hi Bogdan
I tried to follow your directions, but the problem persists.

This is what I did:

In the route where the function do_routing is called I inserted:

########################################################################
# Request route 'invite-to-external'
########################################################################
route[6] {
 if(isflagset(20)) {
 xlog("L_INFO", "Call to foreign domain - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
 route(2);
 exit;
 }
 if(!isflagset(23)) {
 # don't allow calls relaying from PSTN to PSTN, if not explicitely forwarded
 if(uri=~ "^sip:[0-9]+@") {
 xlog("L_INFO", "Call to PSTN\n");
 do_routing();
 xlog("L_INFO", "first attempt is $ru, attributes are $avp(s:drattrs)\n");
 if(!goes_to_gw()) {
 xlog("L_ERR", "No PSTN gateways available - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
 sl_send_reply("503", "PSTN Termination Currently Unavailable");
 exit;
 }
 setflag(21);

 t_on_branch("1");
 t_on_failure("2");
 route(2);
 exit;
 }
 }

 xlog("L_INFO", "Call to unknown user - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
 sl_send_reply("404", "User Not Found");
 exit;
}

In the branch_route:

branch_route[1] {
 if(is_present_hf("P-Asserted-Identity")) {
 xlog("L_INFO", "Removing P-Asserted-Identity in branches\n");
 remove_hf("P-Asserted-Identity");
 }
 if(is_present_hf("Remote-Party-ID")) {
 remove_hf("Remote-Party-ID");
 }
 if(is_avp_set("$avp(s:caller_cli)/s")) {
 xlog("L_INFO", "Set caller CLI '$avp(s:caller_cli)' - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
 append_hf("P-Asserted-Identity: <$avp(s:caller_cli)>\r\n");
 }
 route(14);
}

########################################################################
# Request route 'clir'
########################################################################
route[14] {
 if(isflagset(28) && !isflagset(27)) {
 setflag(27);

 xlog("L_INFO", "Anonymize caller - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
 uac_replace_from("Anonymous","sip:anonymous at anonymous.invalid");
 if(is_present_hf("Privacy")) {
 remove_hf("Privacy");
 }
 append_hf("Privacy: id\r\n");
 }
}

########################################################################
# Request route 'base-outbound'
########################################################################
route[2] {
 xlog("L_INFO","ARRIVATO NELLA ROUTE 2\n");
 t_on_reply("1");

 if(!isflagset(21)) {
 t_on_failure("1");
 }
 if(is_present_hf("Proxy-Authorization")) {
 consume_credentials();
 }

 xlog("L_INFO", "Request leaving server, D-URI='$du' - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");

 if(!t_relay()) {
 sl_reply_error();
 }
 exit;
}

In the failure_route;

########################################################################
# Failure route 'pstn-failover'
########################################################################
failure_route[2] {
 xlog("L_INFO", "Failure route for PSTN entered - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
 route(9);

 if(!use_next_gw()) {
 xlog("L_ERR", "Failed to select next PSTN gateway - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
 exit;
 }
 xlog("L_INFO", "selected next gateway $ru, attributes are $avp(s:drattrs)\n");

 if(is_present_hf("P-Asserted-Identity")) {
 xlog("L_INFO", "Removing P-Asserted-Identity in failure route\n");
 remove_hf("P-Asserted-Identity");
 }
 if(is_present_hf("Remote-Party-ID")) {
 remove_hf("Remote-Party-ID");
 }
 if(is_avp_set("$avp(s:caller_cli)/s")) {
 xlog("L_INFO", "Set caller CLI '$avp(s:caller_cli)' - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
 append_hf("P-Asserted-Identity: <$avp(s:caller_cli)>\r\n");
 #append_hf("Remote-Party-ID: <$avp(s:caller_cli)>;party=caller;privacy=none;screen=yes\r\n");
 }
 route(14);

 t_on_failure("2");
 route(2);
}

In the INVITE sent from proxy to the second gateway are still two P-Asserted Idntity fields.
Where am I wrong?

Thanks in advance.

Matteo Marzuola




>Hi Matteo,

>Whatever change you in request_route will propagate in all branches - 
>this is your problem - when you set the PAI for the first destination, 
>in request_route, the PAI will be present in all future branches.

>To avoid this situation, avoid adding "per-branch" info from 
>request_branch - do it from branch_route; branch_route and failure_route 
>allows changes per branch (and not global ones).

>Do something like:

>request_route -> do_routing + arm branch_route
>branch_route -> set PAI for the first branch
>failure_route -> set PAI for the next branch

>Regards,
>Bogdan

>Hi all. In my scenario I try to use dynamic routing and I have a problem with the P-Asserted Identity field. When >the proxy tries to send the INVITE to the first gateway selected from DRouting module by the function
>do_routing, there is only one PAI field, but if that gateway is down, at the second attempt to next gateway, the >INVITE contains two PAI fields identicals.

>Thanks in advance.

>Matteo Marzuola



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