Dear all,

My use case is :

I defined a username = 112 (for emergency call) This username doesn't exist in subscribers table and unavailable in location table. The idea is when Sopftphone1 call the group = 112 then Kamailio will forward the call to a group using SERIAL FORKING.

=> Softphone 1 -> Sends INVITE to 112 -> Kamailio -> FORWARD TO SERIAL FORKING (4x softphone all registered and in location table). The q priority could be hybrid that means 2x softphone could have same priority.

My issues : - the q priority forced for each softphone is not taking into account. - the first branch created when send INVITE to 112 is still available.

My setup

Kamailio is behind a NAT.

Kamailio version : sipsecure@kamailio:/$ kamailio -version version: kamailio 5.5.4 (x86_64/linux) flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown compiled with gcc 10.2.1 Kamailio.cfg # ----- tm params ----- # auto-discard branches from previous serial forking leg modparam("tm", "failure_reply_mode", 3) # default retransmission timeout: 5sec modparam("tm", "fr_timer", 5000) # default invite retransmission timeout after 1xx: 10sec modparam("tm", "fr_inv_timer", 10000) # This is the name of an XAVP that the t_load_contacts() function uses to store contacts of the destination set and that t_next_contacts() function uses to restore those contacts. modparam("tm", "contacts_avp", "tm_contacts") modparam("tm", "contact_flows_avp", "tm_contact_flows")

# modparam("tm|usrloc", "xavp_contact", "tm_contacts")

# ----- rr params ----- # set next param to 1 to add value to ;lr param (helps with some UAs) modparam("rr", "enable_full_lr", 0) # do not append from tag to the RR (no need for this script) modparam("rr", "append_fromtag", 0) route[INVITE]{     route(THREAD_CHECK);     route(AUTH);     route(RECORD_ROUTE);     setflag(FLT_ACC);

switch($tU)     {         case "112":             xlog("MY_SEVERITY"," -- Calling Group Serial");             route(FORK_SERIAL);         break;

case "113":             xlog("MY_SEVERITY"," -- Calling Group Parralelle");             route(FORK_PARALLEL);         break;

default:             xlog("MY_SEVERITY"," -- Calling Someone");             route(LOCATION);             route(RELAY);         break;     }     exit; }

route[FORK_SERIAL]{

t_on_reply("MANAGE_REPLY");

#!ifndef WITH_BRIDGE_ON_FAIL         setbflag(FLB_BRIDGE);     #!endif     route(IPV4V6);     route(NATMANAGE);

$var(uri1)="sip:9919995@192.168.1.41";     $var(uri2)="sip:9919994@192.168.1.41";         $var(uri3)="sip:9919991@192.168.1.41";     $var(uri4)="sip:9919997@192.168.1.41";

lookup("location","$var(uri4)");     append_branch("$ru","0.2");

lookup("location","$var(uri1)");     append_branch("$ru","0.8");

lookup("location","$var(uri2)");     append_branch("$ru","0.5");

lookup("location","$var(uri3)");     append_branch("$ru","0.5");

t_load_contacts();

t_next_contacts();

t_on_failure("SERIAL");

#!ifdef WITH_SIPSECURE_DEBUG         xlog("MY_SEVERITY","    ROUTE_SERIAL : Relaying \n");     #!endif     #Relay (aka Forward) the request     t_relay();     break; }

failure_route[SERIAL]{

xlog("MY_SEVERITY","At failure route - Trying next destination");

if (!t_next_contacts()) {                 send_reply("408","Nobody available");                 exit;             }

t_on_failure("SERIAL");              t_relay(); }

Any highlight will be welcome.

Best Regards, -- Youssef