Finally, I figured what is going on. The client is the culprit. I am using
pjsip library
which by default is configured to rewrite the Contact Header when it
detects a change
in IP address in response. It is basically Unregistering the Private address
contact and Registering the public IP contact. This is erasing the Cflags
recorded before.
Krish Kura
On Sat, Oct 1, 2011 at 6:21 PM, Krishna Kurapati <kkura...@gmail.com> wrote:
> Hi,
>
> I am hitting bit of a wall here.
>
> - I am setting bflags for NAT, and SIPPING before save("location")
> however,
> when I do "kamctl ul show", the Cflag is 0.
>
> I also checked see if the bflags are set or not in the register routine -
> they are being set.
>
> What am I missing?
>
> snippets of the config files.
>
> #!define FLB_NATB 6
> #!define FLB_NATSIPPING 7
> modparam("nathelper", "natping_interval", 30)
> modparam("nathelper", "ping_nated_only", 1)
> modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)
> modparam("nathelper", "sipping_method", "INFO")
> modparam("nathelper", "sipping_from", "sip:pinger@50.62.1.7")
>
> # params needed for NAT traversal in other modules
> modparam("nathelper|registrar|usrloc", "received_avp", "$avp(RECEIVED)")
> modparam("usrloc", "nat_bflag", FLB_NATB)
>
> # Caller NAT detection route
> route[NAT] {
> #!ifdef WITH_NAT
> force_rport();
> if (nat_uac_test("19")) {
> if (method=="REGISTER") {
> fix_nated_register();
> } else {
> fix_nated_contact();
> }
> setflag(FLT_NATS);
> setbflag(FLB_NATB);
> }
> #!endif
> return;
> }
>
> # Handle SIP registrations
> route[REGISTRAR] {
> if (is_method("REGISTER"))
> {
> xlog("L_ALERT", "REGISTER: From $fU, $fd To $tU, $td");
> if (isflagset(FLT_NATS) || isbflagset(FLB_NATB))
> {
> setbflag(FLB_NATB);
> # uncomment next line to do SIP NAT pinging
> setbflag(FLB_NATSIPPING);
> }
> # 7/28/11 - make sure only one contact location is active
> # at any given time
> # unregister("location", "$rU");
> if (isbflagset(FLB_NATB))
> {
> xlog("L_ALERT", "REGISTRAR: For $fU, $fd FLB_NATB
> set");
> }
>
> if (isbflagset(FLB_NATSIPPING))
> {
> xlog("L_ALERT", "REGISTRAR: For $fU, $fd
> FLB_NATSIPPING set");
> }
>
> if (!save("location"))
> {
> xlog("L_ALERT", "REGISTRAR: From $fU, $fd Location
> could not be saved");
> sl_reply_error();
> }
>
> exit;
> }
> }
>
>
> The debug log snippets
> ==================
> Oct 1 15:58:30 siptest /usr/sbin/kamailio[19515]: ALERT: <script>:
> REGISTER: From p_krishna_test_com, 50.62.1.7 To p_krishna_test_com,
> 50.62.1.7
> Oct 1 15:58:30 siptest /usr/sbin/kamailio[19515]: ALERT: <script>:
> REGISTRAR: For p_krishna_test_com, 50.62.1.7 FLB_NATB set
> Oct 1 15:58:30 siptest /usr/sbin/kamailio[19515]: ALERT: <script>:
> REGISTRAR: For p_krishna_test_com, 50.62.1.7 FLB_NATSIPPING set
> Oct 1 15:58:30 siptest /usr/sbin/kamailio[19515]: DEBUG: sl [sl.c:278]:
> reply in stateless mode (sl)
>
> Output of kamctl command
> ====================
> $ sudo kamctl ul show
> Domain:: location table=512 records=1 max_slot=1
> AOR:: p_krishna_test_com
> Contact:: sip:p_krishna_test_com@75.62.17.45:50073;transport=tcp;ob Q=
> Expires:: 287
> Callid:: ad2d3a7bf39a4345861db1661576a7f3
> Cseq:: 54856
> User-agent:: QliqDesktop 1.0.0 (pjproject 1.10.0/win32)
> State:: CS_NEW
> Flags:: 0
> Cflag:: 0
> <================= Cflag is not being set.
> Socket:: tcp:10.1.0.6:5060
> Methods:: 8143
>
> Thanks
> Krish Kura
>
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