[SR-Users] Dispatcher BYE issue

[Ahmed Salem]

Hi,

I'm trying to achieve this configuration

phone --> NAT --> kamailio loadbalancer --> kamailio sip/proxy
            --> kamailio sip/proxy

With the attached configuration I can make calls without any problems
but when the callee hangs up the call does not end only the caller can hang
up.

Btw I'm using tcp for signalling.

Any ideas?
Thanks

#!define FLT_ACC 1
#!define FLT_ACCMISSED 2
#!define FLT_ACCFAILED 3
#!define FLT_NATS 5

#!define FLB_NATB 6
#!define FLB_NATSIPPING 7


mhomed=1

####### Global Parameters #########

#!ifdef WITH_DEBUG
debug=4
log_stderror=yes
#!else
debug=2
log_stderror=no
#!endif

memdbg=5
memlog=5

log_facility=LOG_LOCAL0

fork=yes
children=4

tcp_async=yes
tcp_connection_lifetime=3605

port=5060
sip_warning=yes

####### Modules Section ########

#!ifdef WITH_SRCPATH
mpath="modules_k:modules"
#!else
mpath="/usr/lib/x86_64-linux-gnu/kamailio/modules/"
#!endif

loadmodule "db_mysql.so"
loadmodule "mi_fifo.so"
loadmodule "kex.so"
loadmodule "tm.so"
loadmodule "tmx.so"
loadmodule "sl.so"
loadmodule "rr.so"
loadmodule "pv.so"
loadmodule "maxfwd.so"
loadmodule "textops.so"
loadmodule "siputils.so"
loadmodule "xlog.so"
loadmodule "sanity.so"
loadmodule "ctl.so"
loadmodule "mi_rpc.so"
loadmodule "acc.so"
loadmodule "usrloc.so"
loadmodule "registrar.so"
loadmodule "dispatcher.so"
loadmodule "nathelper.so"
loadmodule "rtpproxy.so"
loadmodule "path.so"

# ----------------- setting module-specific parameters ---------------


# ----- mi_fifo params -----
modparam("mi_fifo", "fifo_name", "/var/run/kamailio/kamailio_fifo")

# ----- rr params -----
# add value to ;lr param to cope with most of the UAs
modparam("rr", "enable_full_lr", 1)
# do not append from tag to the RR (no need for this script)
modparam("rr", "append_fromtag", 1)
modparam("rr", "enable_double_rr", 0)


# ----- tm params -----
modparam("tm", "failure_reply_mode", 3)
modparam("tm", "fr_timer", 3000)
modparam("tm", "fr_inv_timer", 120000)

# ----- dispatcher params -----
modparam("dispatcher", "db_url",
"mysql://kamailio:kamailiorw@localhost/kamailio")
modparam("dispatcher", "table_name", "dispatcher")
modparam("dispatcher", "flags", 2)
#modparam("dispatcher", "force_dst", 1)
modparam("dispatcher", "setid_col", "setid")
modparam("dispatcher", "destination_col", "destination")
modparam("dispatcher", "flags_col", "flags")
modparam("dispatcher", "priority_col", "priority")
modparam("dispatcher", "dst_avp", "$avp(AVP_DST)")
modparam("dispatcher", "grp_avp", "$avp(AVP_GRP)")
modparam("dispatcher", "cnt_avp", "$avp(AVP_CNT)")


modparam("path", "use_received", 1)

modparam("registrar", "use_path", 1)
modparam("registrar", "path_mode", 0)
modparam("registrar", "path_use_received", 1)

modparam("nathelper", "natping_interval", 30)
modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)
modparam("nathelper", "sipping_from", "sip:pinger at kamailio.org")

# params needed for NAT traversal in other modules
modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)")
modparam("usrloc", "nat_bflag", FLB_NATB)

####### Routing Logic ########


# main request routing logic

request_route {
xlog("L_NOTICE", "*** loose routing enforced before: $rm, $ru, $si, $du\n");
# per request initial checks
  route(REQINIT);
 loose_route();
 # handle requests within SIP dialogs
route(WITHINDLG);

### only initial requests (no To tag)

# CANCEL processing
if (is_method("CANCEL"))
{
if (t_check_trans())
t_relay();
exit;
}

t_check_trans();

# record routing for dialog forming requests (in case they are routed)
# - remove preloaded route headers
#remove_hf("Route");
if (is_method("INVITE")){
record_route();
}
 if(is_method("REGISTER")){
add_path_received();
fix_nated_register();
}
else{
add_contact_alias();
}

# dispatch destinations
route(DISPATCH);

route(RELAY);
}


route[RELAY] {
if (!t_relay()) {
sl_reply_error();
}
exit;
}

# Per SIP request initial checks
route[REQINIT] {
if (!mf_process_maxfwd_header("10")) {
sl_send_reply("483","Too Many Hops");
exit;
}

if(!sanity_check("1511", "7"))
{
xlog("L_NOTICE", "*** loose routing enforced before: $rm, $ru, $si, $du\n");
xlog("Malformed SIP message from $si:$sp\n");
exit;
}
}

# Handle requests within SIP dialogs
route[WITHINDLG] {
if (has_totag()) {
# sequential request withing a dialog should
# take the path determined by record-routing
if (loose_route()) {
if (is_method("BYE")) {
setflag(1); # do accounting ...
setflag(3); # ... even if the transaction fails
}
route(RELAY);
} else {
if (is_method("SUBSCRIBE") && uri == myself) {
# in-dialog subscribe requests
#route(PRESENCE);
exit;
}
if ( is_method("ACK") ) {
 if ( t_check_trans() ) {
# non loose-route, but stateful ACK;
# must be ACK after a 487 or e.g. 404 from upstream server
t_relay();
exit;
} else {
# ACK without matching transaction ... ignore and discard.
exit;
}
}
sl_send_reply("404","Not here");
}
exit;
}
}

# Dispatch requests
route[DISPATCH] {
# round robin dispatching on gateways group '1'
if(!ds_select_domain("1", "0"))
{
send_reply("404", "No destination");
exit;
}
xlog("L_DBG", "--- SCRIPT: going to <$ru> via <$du>\n");
t_on_failure("RTF_DISPATCH");
return;
}

# Sample failure route
failure_route[RTF_DISPATCH] {
if (t_is_canceled()) {
exit;
}
# next DST - only for 500 or local timeout
if (t_check_status("500")
or (t_branch_timeout() and !t_branch_replied()))
{
if(ds_next_domain())
{
xlog("L_NOTICE", "going to next dst\n");
t_on_failure("RTF_DISPATCH");
route(RELAY);
exit;
}
}
}
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