Merge branch 'mtu_option' into 'develop'

Add UE MTU as an option from config file

See merge request oai/cn5g/oai-cn5g-smf!95

etc/smf.conf

@@ -55,7 +55,7 @@ SMF =
         IPV4_LIST = (
                       {RANGE = "12.1.1.2 - 12.1.1.128";},         # STRING, IPv4 RANGE IP_start - IP_end, YOUR NETWORK CONFIG HERE.
                       {RANGE = "12.1.1.129 - 12.1.1.224";},       # STRING, IPv4 RANGE IP_start - IP_end, YOUR NETWORK CONFIG HERE.
-                      {RANGE = "10.10.10.2 - 10.10.10.253";}  # STRING, IPv4 RANGE IP_start - IP_end, YOUR NETWORK CONFIG HERE.
+                      {RANGE = "10.10.10.2 - 10.10.10.253";}      # STRING, IPv4 RANGE IP_start - IP_end, YOUR NETWORK CONFIG HERE.
 
                     );
         IPV6_LIST = (
@@ -77,8 +77,10 @@ SMF =
     DEFAULT_DNS_SEC_IPV4_ADDRESS = "@DEFAULT_DNS_SEC_IPV4_ADDRESS@";  # YOUR DNS CONFIG HERE
     DEFAULT_DNS_IPV6_ADDRESS     = "2001:4860:4860::8888";            # YOUR DNS CONFIG HERE
     DEFAULT_DNS_SEC_IPV6_ADDRESS = "2001:4860:4860::8844";            # YOUR DNS CONFIG HERE
- 
- 
+    
+    #Default UE MTU
+    UE_MTU = 1358;
+  
     # SUPPORT FEATURES
     SUPPORT_FEATURES: 
     {

src/smf_app/smf_config.cpp

@@ -553,6 +553,7 @@ int smf_config::load(const string& config_file) {
           astring.c_str());
     }
 
+    // UE MTU
     smf_cfg.lookupValue(SMF_CONFIG_STRING_UE_MTU, ue_mtu);
 
     // Support features
@@ -986,6 +987,7 @@ void smf_config::display() {
   Logger::smf_app().info(
       "    Scheduling prio .....: %d",
       itti.async_cmd_sched_params.sched_priority);
+
   Logger::smf_app().info("- " SMF_CONFIG_STRING_IP_ADDRESS_POOL ":");
   for (int i = 0; i < num_ue_pool; i++) {
     std::string range_low(inet_ntoa(ue_pool_range_low[dnn[i].pool_id_iv4]));
@@ -1044,6 +1046,7 @@ void smf_config::display() {
     }
   }
 
+  Logger::smf_app().info("- Default UE MTU: %d", ue_mtu);
   Logger::smf_app().info("- Supported Features:");
   Logger::smf_app().info(
       "    Register to NRF............: %s", register_nrf ? "Yes" : "No");
@@ -1255,4 +1258,5 @@ bool smf_config::get_nwi_list_index(
     nwi_enabled = false;
     return false;
   }
-}
+  return true;
\ No newline at end of file
+}

src/smf_app/smf_config.hpp

@@ -309,7 +309,7 @@ class smf_config {
       ue_pool_excluded[i]     = {};
     }
     force_push_pco = true;
-    ue_mtu         = 1500;
+    ue_mtu         = 1358;
 
     itti.itti_timer_sched_params.sched_priority = 85;
     itti.n4_sched_params.sched_priority         = 84;