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#601 SIPv6 UA can't receive a 423 (Interval Too Brief) response
SIPv6 UA can't receive a 423 (Interval Too Brief) response from openser-1.3.4-12.fc13.i686 SIPv6 Registrar Server when expiration of a REGISTER request is less than a registrar-configured minimum.The details can be seen as follows. Is it a bug or can be resolved by modifying configuration file?
1 Test topology:
NUT(REG && PX) UA11 UA12 DNS
| | | |
IP : 3ffe:501:ffff:50::50 3ffe:501:ffff:1::1 3ffe:501:ffff:2::2 3ffe:501:ffff:4::1
aor-uri : ss.under.test.com UA11@under.test.com UA12@under.test.com
contact-uri : UA11@node.under.test.com UA12@node11.under.test.com
2 the tcpdump file can be seen in "SIP Registrar- Expiration of REGISTER request less than a registrar-configured minimum" attachment
3 openser-1.3.4-12 configuration file can be seen in openser.cfg attachment.
I have added the following block into the openser.cfg
"
modparam("registrar", "default_expires", 3600)
modparam("registrar", "min_expires", 60)
"
openser configuration file
tcpdump file
Hi!
1. Openser 1.3 is rather old and not supported anymore. Anyway, the behavior has not changed in newer versions.
2. Openser/Kamailio/sip-router does not have an implicit mechanism to send 423 - it uses a different approach. It just overrides the user-provided expires value and set a different one. Take a look at the 200 OK response - the Contact header has a different expire value (660) then the requested one (30).
3. if you really need 423, you have to script it. e.g. in Kamilio 3.0 Syntax:
if ($hdr[Expires] < 3600) {
append_to_reply("Min-Expires: 3600\r\n");
sl_send_reply("423","Intervall to short");
exit;
}
4. For such discussions please use the kamailio mailing list