Help me, kamailio step-bros, i'm stuck!
Im trying to build logic, where if target client was not located on this node -
message is forwarded to the next node, until sip message make full circle, and
it will be handled by its 'X-Visited-Nodes' header and fire 404 if no one
consumed it. (I can see that check is buggy, but i will fix this later so don't
pay much attention to it)
Im blocked by t_relay() behaviour, which is ignore destination selected by
ds_select_dst;
Instead of forwarding message, it comes on the same node again and again
>>>> my dispatcher config
927 route[DISPATCH] {
928 $var(destination_found) = 0;
929 $var(checked_nodes) = ""; # Keep track of locally checked nodes
930 $var(loop_behaviour) = 0;
931
932 # Initialize X-Visited-Nodes if it doesn't exist
933 if ($hdrc(X-Visited-Nodes) == 0) {
934 append_hf_value("X-Visited-Nodes", ""); # Initialize the header
in the message
935 }
936
937 xlog("X-Visited-Nodes: $hdr(X-Visited-Nodes)");
938 append_hf_value("X-Visited-Nodes", "$du");
939 # Round-robin dispatching on gateways group '1'
940 while (ds_select_dst("1", "4") && $var(loop_behaviour) != 2) {
941 $var(loop_behaviour) = 0;
942 # Get the current proposed destination
943 $var(current_dest) = $du;
944
945 # 1. Skip if the proposed destination is self
946 if ($var(loop_behaviour) == 0 && $var(current_dest) =~ ".*" + $Ri
+ ".*") {
947 xlog("Skipping self destination <$var(current_dest)>\n");
948 ds_mark_dst(); # Mark this node globally only because it's
"self"
949 $var(loop_behaviour) = 1; #continue
950 }
951
952 # 2. Check if we've made a full circle
953 if ($var(loop_behaviour) == 0 && $var(checked_nodes) =~ "^" +
$var(current_dest) + ".*") {
954 xlog("All nodes checked, no valid destination found\n");
955 send_reply("404", "No user found, no new destination
available");
956 exit;
957 }
958
959 # 3. Check if the node is already in X-Visited-Nodes
960 if ($var(loop_behaviour) == 0 && $hdr(X-Visited-Nodes) =~ ".*" +
$var(current_dest) + ".*") {
961 xlog("Node <$var(current_dest)> already in X-Visited-Nodes\n");
962 $var(checked_nodes) = $var(checked_nodes) + "," +
$var(current_dest);
963 $var(loop_behaviour) = 1; #continue
964 }
965
966 if($var(loop_behaviour) == 0){
974 xlog("DISPATCHER: selected reqURI: <$ru> ; destURI: <$du> via
<$var(current_dest)> (attrs: $xavp(_dsdst_=>attrs))\n");
975 $var(destination_found) = 1;
976 $var(loop_behaviour) = 2; # Exit the loop as a valid destination
is found
977 }
978 }
979
980 # If a destination is found, relay the message
981 if ($var(destination_found)) {
987 if (!t_relay()) {
988 sl_reply_error();
989 }
990 exit;
991 } else {
992 return(-1);
993 }
994 }
>>>> INVITE message trace (every line was trimmed to not garbage this message
>>>> with irrelevant info like process name or timestamp)
i have enabled config trace mode, so my invite message inside dispatcher route
looks like this. And on my other node, there is not a trace of invite message
{1 22 INV CmLZ} <script>: Lookup for 02222 failed - no such client on this
node <--- Trying to call user, which is not registered on this node, so
location route returns fail and message should go on another node
{1 22 INV CmLZ} trace(): request_route=[LOCATION]
c=[/etc/kamailio/kamailio.cfg] l=845 a=16 n=if
{1 22 INV CmLZ} trace(): request_route=[LOCATION]
c=[/etc/kamailio/kamailio.cfg] l=842 a=63 n=assign
{1 22 INV CmLZ} trace(): request_route=[LOCATION]
c=[/etc/kamailio/kamailio.cfg] l=843 a=2 n=return
{1 22 INV CmLZ} trace(): request_route=[DEFAULT_ROUTE]
c=[/etc/kamailio/kamailio.cfg] l=653 a=16 n=if
{1 22 INV CmLZ} trace(): request_route=[DEFAULT_ROUTE]
c=[/etc/kamailio/kamailio.cfg] l=650 a=16 n=if
{1 22 INV CmLZ} trace(): request_route=[DEFAULT_ROUTE]
c=[/etc/kamailio/kamailio.cfg] l=645 a=5 n=route
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=928 a=63 n=assign
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=929 a=63 n=assign
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=930 a=63 n=assign
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=937 a=16 n=if
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=934 a=26 n=append_hf_value
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=937 a=25 n=xlog
{1 22 INV CmLZ} <script>: X-Visited-Nodes: <null>
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=938 a=26 n=append_hf_value
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=978 a=23 n=while
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=940 a=26 n=ds_select_dst
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=941 a=63 n=assign
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=943 a=63 n=assign
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=953 a=16 n=if
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=960 a=16 n=if
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=966 a=16 n=if
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=978 a=16 n=if
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=974 a=25 n=xlog
{1 22 INV CmLZ} <script>: DISPATCHER: selected reqURI:
<sip:02...@kamailio-nlb-test-40f4f509064551a6.elb.eu-west-1.amazonaws.com> ;
destURI: <sip:10.197.200.228:5060> via <sip:10.197.200.228:5060> (attrs:
<null>) <--- destination uri is correct, message should be sent to next
kamailio node isn't it?
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=975 a=63 n=assign
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=976 a=63 n=assign
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=940 a=26 n=ds_select_dst
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=993 a=16 n=if
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=990 a=16 n=if
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=987 a=24 n=t_relay <-- should relay to $dU
destination
{1 22 INV CmLZ} tm [t_lookup.c:1868]: t_newtran(): msg (0x7d0ad3775368)
id=28/25950 global id=28/25950 T start=(nil)
{1 22 INV CmLZ} tm [t_lookup.c:781]: t_lookup_request(): start searching:
hash=9408, isACK=0
{1 22 INV CmLZ} tm [t_lookup.c:499]: matching_3261(): RFC3261 transaction
matching failed - via branch [z9hG4bK.YP1EiC6qX]
{1 22 INV CmLZ} tm [t_lookup.c:981]: t_lookup_request(): no transaction found
{1 22 INV CmLZ} tm [h_table.c:532]: tm_xdata_swap(): copy X/AVPs from msg
context to txdata
{1 22 INV CmLZ} tm [t_hooks.c:301]: run_reqin_callbacks_internal():
trans=0x7d0acdbf1168, callback type 1, id 0 entered
{1 22 INV CmLZ} tm [h_table.c:551]: tm_xdata_swap(): restore X/AVPs msg
context from txdata
{1 22 INV CmLZ} tm [h_table.c:415]: build_cell(): created new cell
0x7d0acdbf1168
{1 22 INV CmLZ} tm [t_funcs.c:339]: t_relay_to(): new INVITE
{1 22 INV CmLZ} tm [t_reply.c:634]: _reply_light(): reply sent out -
buf=0x7d0ad3755d98: SIP/2.0 100 trying -... shmem=0x7d0acdbf4b10: SIP/2.0 100
trying -
{1 22 INV CmLZ} tm [t_reply.c:645]: _reply_light(): finished
{1 22 INV CmLZ} tm [t_funcs.c:386]: t_relay_to(): new transaction forwarded
{1 22 INV CmLZ} trace(): request_route=[DISPATCH]
c=[/etc/kamailio/kamailio.cfg] l=990 a=2 n=exit <--- same invite appears on
this node instead of being forwarded to next kamailio node
{1 22 INV CmLZ} trace(): request_route=[DEFAULT_ROUTE]
c=[/etc/kamailio/kamailio.cfg] l=585 a=5 n=route
{1 22 INV CmLZ} trace(): request_route=[REQINIT]
c=[/etc/kamailio/kamailio.cfg] l=699 a=67 n=set_rpl_no_connect
{1 22 INV CmLZ} trace(): request_route=[REQINIT]
c=[/etc/kamailio/kamailio.cfg] l=702 a=55 n=force_rport
{1 22 INV CmLZ} trace(): request_route=[REQINIT]
c=[/etc/kamailio/kamailio.cfg] l=727 a=16 n=if
{1 22 INV CmLZ} trace(): request_route=[REQINIT]
c=[/etc/kamailio/kamailio.cfg] l=732 a=16 n=if
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