Vitali, I believe I had the same problem as you and I found a resolution for it. I never posted anything about my findings as I wasn't sure if I really fixed something or perhaps I just didn't understand the functionality, or perhaps it was already fixed in CVS. In any event, when I upgraded to the release version of 0.8.12 my natping stopped working. It worked fine in 0.8.11 but as soon as I upgraded to 0.8.12, I could see in tethereal trace that the pings were no longer being sent. I discovered that there seems to be a bug with the imported declaration of get_all_ucontacts() in the top of nathelper.c. The declaration was: static int (*get_all_ucontacts)(void *buf, int len) = NULL; However, because of the new addition of the flags parameter in the usrloc module, this was now inconsistent with the exported function, which now expects three parameters, the third parameter being the flag. I modified the declaration in nathelper.c to say: static int (*get_all_ucontacts)(void *buf, int len, unsigned int flags) = NULL; I then updated the mod_init function in nathelper.c to include the correct casting of the get_all_ucontacts function pointer, so that it included the third parameter. i.e. if (natping_interval > 0) { get_all_ucontacts = (int (*)(void *, int, unsigned int flags))find_export("ul_get_all_ucontacts", 1, 0); ... and finally in the two places that this function (get_all_ucontacts) was called in the timer function, I added the third parameter (flags) as 0, so that all three parameters were satisfied, i.e. rval = get_all_ucontacts(buf, cblen, 0); You could of course use the constants for the specific flags instead of just 0, but I was interested in the default. Once I made these changes, natping was working again. I hope this helps you. If anyone has more accurate information on this please let me know. Josh Hello Vitali, ok.. nobody answering. or i asked something really stuped or nobody knows :) i traced get_all_ucontacts from dlist.c from usrloc. this function supposed to give all contact that has specified flag set. and it trying to compare flag in the database with: 1074111736 in : for (r = p->d->d_ll.first; r != NULL; r = r->d_ll.next) { for (c = r->contacts; c != NULL; c = c->next) { if (c->c.len <= 0) continue; /* * List only contacts that have all requested * flags set */ if ((c->flags & flags) != flags) { ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ LOG(L_ERR, "Usrloc, get_all_ucontacts: flags != flags %d != %d\n", c->flags, flags); // continue; } I am still trying to find out how it happend.. please stop me from reading sources if I forget something really important. just commenting "continue" is really bad in my opinion Thursday, January 29, 2004, 12:07:27 PM, you wrote: VN> Hello, VN> I have problem with natping_interval.. it is not pinging at all and VN> look like it just doesnot aware that I have something registered VN> I use lates table release: 0.8.12 VN> I added some more debugging in nathelper.c to timer function: VN> DBG("DEBUG: nathelper buff != NULL\n"); VN> cp = buf; VN> while (1) { VN> memcpy(&(c.len), cp, sizeof(c.len)); VN> if (c.len == 0) { VN> LOG(L_ERR, "ERROR: nathelper::c.len == 0\n"); VN> break; VN> } VN> and can see that it break from the loop with c.len = 0. but when i VN> look at location table in mysql there is few devices registered. VN> probably something with ul_get_all_ucontact from usrloc.. VN> please advise VN> here is config: VN> loadmodule "/usr/local/lib/ser/modules/sl.so" VN> loadmodule "/usr/local/lib/ser/modules/tm.so" VN> loadmodule "/usr/local/lib/ser/modules/rr.so" VN> loadmodule "/usr/local/lib/ser/modules/auth.so" VN> loadmodule "/usr/local/lib/ser/modules/auth_db.so" VN> loadmodule "/usr/local/lib/ser/modules/mysql.so" VN> loadmodule "/usr/local/lib/ser/modules/auth_mssql.so" VN> loadmodule "/usr/local/lib/ser/modules/usrloc.so" VN> loadmodule "/usr/local/lib/ser/modules/textops.so" VN> loadmodule "/usr/local/lib/ser/modules/maxfwd.so" VN> loadmodule "/usr/local/lib/ser/modules/registrar.so" VN> loadmodule "/usr/local/lib/ser/modules/nathelper.so" VN> loadmodule "/usr/local/lib/ser/modules/exec.so" VN> modparam("nathelper", "natping_interval", 10) VN> modparam("registrar", "nat_flag", 6) VN> # modparam("nathelper", "ping_nated_only", 1) # Ping only clients behind NAT VN> modparam("auth_db", "db_url","sql://ser:XXX@localhost/ser") VN> modparam ("usrloc", "db_mode", 1) VN> modparam("usrloc", "use_domain", 0) VN> modparam("usrloc", "db_url", "sql://ser:XXX@localhost/ser") VN> modparam("rr", "enable_full_lr", 1) VN> force_rport(); VN> fix_nated_contact(); VN> setflag(6); # Mark as natted all clients VN> if (!(method=="REGISTER")) record_route(); # 1=loose routing VN> # loose-route processing VN> if (loose_route()) { VN> log(1, "LOOSE ROUTE\n"); VN> t_relay(); VN> break; VN> }; VN> if(!uri==myself) { VN> log(1, "URI!=myself"); VN> t_relay(); VN> break; VN> }; VN> if (method=="REGISTER") { VN> log(1, "REGISTER REQUEST RECEIVED\n"); VN> if (!mssql_authorize("209.227.183.21", "subscriber")) { VN> log(1, "AUTH FAILED, REQUESTED\n"); VN> www_challenge("", "1"); VN> break; VN> }; VN> log(1, "AUTH OK, REGISTER\n"); VN> save("location"); VN> break; VN> }; VN> ..... -- Best regards, Vitali