BUGFIX(GTP-U): Add missing ip rules in order to have point to point connection

cmake_targets/tools/run_enb_ue_virt_s1

@@ -247,12 +247,6 @@ function main()
   if [ $? -ne 0 ]; then
     echo "200 lte " >> /etc/iproute2/rt_tables
   fi
-  ip rule add fwmark 1 table lte 
-  ifconfig oip1 up
-  ip route add default dev oip1 table lte
-  # the actual IP address depends on the EPC/MME config file for address pool
-  ip route add from 192.188.0.0/24 table lte
-  ip route add to 192.188.0.0/24 table lte
 
   exe_arguments="$exe_arguments -s15 -AAWGN -y1 -b1 -u1 -Q0"
     

openair3/NAS/UE/ESM/DedicatedEpsBearerContextActivation.c

@@ -165,7 +165,7 @@ int esm_proc_dedicated_eps_bearer_context_request(nas_user_t *user, int ebi, int
       *esm_cause = ESM_CAUSE_SYNTACTICAL_ERROR_IN_PACKET_FILTER;
     } else {
       /* Create new dedicated EPS bearer context */
-      default_ebi = esm_ebr_context_create(esm_data, pid, ebi, FALSE, qos, tft);
+      default_ebi = esm_ebr_context_create(esm_data, user->ueid, pid, ebi, FALSE, qos, tft);
 
       if (default_ebi != ESM_EBI_UNASSIGNED) {
         /* Dedicated EPS bearer contextx successfully created */

openair3/NAS/UE/ESM/DefaultEpsBearerContextActivation.c

@@ -127,7 +127,7 @@ int esm_proc_default_eps_bearer_context_request(nas_user_t *user, int pid, int e
 
   if (ebi != ESM_EBI_UNASSIGNED) {
     /* Create new default EPS bearer context */
-    ebi = esm_ebr_context_create(esm_data, pid, ebi, TRUE, qos, NULL);
+    ebi = esm_ebr_context_create(esm_data, user->ueid, pid, ebi, TRUE, qos, NULL);
 
     if (ebi != ESM_EBI_UNASSIGNED) {
       /* Default EPS bearer contextx successfully created */

openair3/NAS/UE/ESM/esm_ebr_context.c

@@ -98,7 +98,7 @@ static int _esm_ebr_context_check_precedence(const network_tft_t *,
  **                                                                        **
  ***************************************************************************/
 int esm_ebr_context_create(
-  esm_data_t *esm_data,
+  esm_data_t *esm_data, int ueid,
   int pid, int ebi, int is_default,
   const network_qos_t *qos, const network_tft_t *tft)
 {
@@ -206,7 +206,7 @@ int esm_ebr_context_create(
            char          *netmask      = NULL;
            char           broadcast[INET_ADDRSTRLEN];
            struct in_addr in_addr;
-           char           command_line[128];
+           char           command_line[500];
            int            res;
 
            switch (pdn->type) {
@@ -272,11 +272,17 @@ int esm_ebr_context_create(
              }
 
              res = sprintf(command_line,
-                           "ifconfig oip1 %s netmask %s broadcast %s",
-                           ipv4_addr, netmask, broadcast);
-             (void)res; /* avoid gcc warning "set but not used" */
-             //                            AssertFatal((res > 0) && (res < 128),
-             //                                    "error in system command line");
+                           "ifconfig oip%d %s netmask %s broadcast %s up && "
+                           "ip rule add from %s/32 table %d && "
+                           "ip rule add to %s/32 table %d && "
+                           "ip route add default dev oip%d table %d",
+                           ueid + 1, ipv4_addr, netmask, broadcast,
+                           ipv4_addr, ueid + 201,
+                           ipv4_addr, ueid + 201,
+                           ueid + 1, ueid + 201);
+             if ( res<0 ) {
+                LOG_TRACE(WARNING, "ESM-PROC  - Failed to system command string");
+             }
              LOG_TRACE(INFO, "ESM-PROC  - executing %s ",
                        command_line);
 

openair3/NAS/UE/ESM/esm_ebr_context.h

@@ -66,7 +66,7 @@ typedef enum {
 /******************  E X P O R T E D    F U N C T I O N S  ******************/
 /****************************************************************************/
 
-int esm_ebr_context_create(esm_data_t *esm_data, int pid, int ebi, int is_default,
+int esm_ebr_context_create(esm_data_t *esm_data, int ueid, int pid, int ebi, int is_default,
                            const network_qos_t *qos, const network_tft_t *tft);
 
 int esm_ebr_context_release(nas_user_t *user, int ebi, int *pid, int *bid);

targets/SIMU/USER/oaisim.c

@@ -1886,6 +1886,9 @@ oai_shutdown (void)
   for (int i = 0; i < NUMBER_OF_eNB_MAX + NUMBER_OF_UE_MAX; i++)
     if (oai_emulation.info.oai_ifup[i] == 1) {
       char interfaceName[8];
+      char command_line[100];
+      sprintf(command_line, "while ip rule del table %d; do true; done",i+201);
+      system(command_line);
       snprintf (interfaceName, sizeof(interfaceName), "oai%d", i);
       bringInterfaceUp (interfaceName, 0);
     }