IE F-TEID - fix for bit CH

src/pfcp/3gpp_29.244.hpp

@@ -635,7 +635,11 @@ class pfcp_fteid_ie : public pfcp_ie {
       if (u1.bf.v6) {
         tlv.add_length(16);
       }
-    } else {
+    }
+      if (u1.bf.ch & b.v4){
+      u1.bf.v4 = b.v4;
+    }
+    else {
       ipv4_address.s_addr = INADDR_ANY;
       ipv6_address        = in6addr_any;
       // else should clear v4 v6 bits

src/smf_app/smf_procedure.cpp

@@ -226,6 +226,11 @@ int session_create_sm_context_procedure::run(
       1;  // SMF requests the UPF to assign a local F-TEID to the PDR
   // TODO required?: local_fteid.v4 = 1;
   // local_fteid.chid = 1;
+  
+  // TS 29.244 R16 8.2.3 -> At least one of the V4 and V6 flags shall be set to "1", and both may be set to "1" for scenarios
+  // when the UP function is requested to allocate the F-TEID, i.e. when CHOOSE bit is set to "1",
+  // and the IPv4 address and IPv6 address fields are not present.
+  local_fteid.v4 = 1;
   pdi.set(local_fteid);
   // TODO: Network Instance
   // UE IP address