[SR-Users] loose_route() problem

[Juha Heinanen]

my proxy is listening at udp/tcp ip:port 192.98.102.30:5060 and my
script has this for in-dialog requests:

route [IN_DIALOG_REQUEST] { # handle in-dialog request

    if (!loose_route()) {
        xlog("L_INFO", "Loose route failed on $hdr(route)\n");
        ...
        exit;
    };

    xlog("L_INFO", "destination uri after loose_route: <$du>\n");

if i send to my proxy with sipp this in-dialog bye:

<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE scenario SYSTEM "sipp.dtd">

<scenario name="In-dialog BYE">

<send>
<![CDATA[

BYE sip:test at 192.98.102.30:53846;transport=tcp SIP/2.0
Via: SIP/2.0/UDP 192.98.101.40;branch=z9hG4bK63f.e9d25102.0
Via: SIP/2.0/UDP 192.98.101.157:5080;branch=z9hG4bK6955a179;rport=5080
Route: <sip:192.98.102.30;r2=on;lr;n1>,<sip:192.98.102.30;transport=tcp;r2=on;lr;n1>
Max-Forwards: 16
From: <sip:jh at test.tutpro.com>;tag=as0cb9dd4f
To: "Test" <sip:test at test.tutpro.com>;tag=3feea37d
Call-ID: d745a79b66919309ba2ef68fde0ca13e at 0:0:0:0:0:0:0:0
CSeq: 102 BYE
Content-Length: 0

]]>
</send>

</scenario>

i correctly get to syslog:

Apr  1 20:47:28 siika /usr/sbin/sip-proxy[9583]: INFO: destination uri after loose_route: <<null>>

that is, the proxy removed both route uris that pointed to itself from
the route set leaving empty $du.

however, if i send to my proxy with sipp this in-dialog bye (where the
only difference to the previous one is request uri that now contains alias
param):

<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE scenario SYSTEM "sipp.dtd">

<scenario name="In-dialog BYE">

<send>
<![CDATA[

BYE sip:test at 192.98.102.30:5060;alias=192.98.102.30~53846~2;transport=tcp SIP/2.0
Via: SIP/2.0/UDP 192.98.101.40;branch=z9hG4bK63f.e9d25102.0
Via: SIP/2.0/UDP 192.98.101.157:5080;branch=z9hG4bK6955a179;rport=5080
Route: <sip:192.98.102.30;r2=on;lr;n1>,<sip:192.98.102.30;transport=tcp;r2=on;lr;n1>
Max-Forwards: 16
From: <sip:jh at test.tutpro.com>;tag=as0cb9dd4f
To: "Test" <sip:test at test.tutpro.com>;tag=3feea37d
Call-ID: d745a79b66919309ba2ef68fde0ca13e at 0:0:0:0:0:0:0:0
CSeq: 102 BYE
Content-Length: 0

]]>
</send>

</scenario>

i get to syslog:

Apr  1 20:51:20 siika /usr/sbin/sip-proxy[9540]: INFO: destination uri after loose_route: <sip:192.98.102.30;transport=tcp;r2=on;lr;n1>

can someone explain, how it is possible that when request uri changes,
loose_route() does not anymore consume both route uris that point to the
proxy itself?  could this be a bug in loose_route()?

-- juha