Adding common utility file to have common functions defined

Signed-off-by: rashmi <[email protected]>

Author: rsarwad

lte/gateway/c/oai/common/common_utility_funs.cpp

@@ -0,0 +1,61 @@
+/*
+Copyright 2020 The Magma Authors.
+
+This source code is licensed under the BSD-style license found in the
+LICENSE file in the root directory of this source tree.
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+#pragma once
+
+#include <stdint.h>
+#include <iostream>
+#include "common_utility_funs.h"
+#include "lte/protos/mconfig/mconfigs.pb.h"
+
+// Extract MCC and MNC from the imsi received and match with
+// configuration
+extern "C" int match_fed_mode_map(const char* imsi, log_proto_t module) {
+  OAILOG_FUNC_IN(module);
+  imsi64_t imsi64;
+  IMSI_STRING_TO_IMSI64(imsi, &imsi64);
+  uint8_t mcc_d1 = imsi[0] - '0';
+  uint8_t mcc_d2 = imsi[1] - '0';
+  uint8_t mcc_d3 = imsi[2] - '0';
+  uint8_t mnc_d1 = imsi[3] - '0';
+  uint8_t mnc_d2 = imsi[4] - '0';
+  uint8_t mnc_d3 = imsi[5] - '0';
+  if ((mcc_d1 < 0 || mcc_d1 > 9) || (mcc_d2 < 0 || mcc_d2 > 9) ||
+      (mcc_d3 < 0 || mcc_d3 > 9) || (mnc_d1 < 0 || mnc_d1 > 9) ||
+      (mnc_d2 < 0 || mnc_d2 > 9) || (mnc_d3 < 0 || mnc_d3 > 9)) {
+    OAILOG_ERROR_UE(module, imsi64, "MCC/MNC is not a decimal digit \n");
+    OAILOG_FUNC_RETURN(module, RETURNerror);
+  }
+  for (uint8_t itr = 0; itr < mme_config.mode_map_config.num; itr++) {
+    if (((mcc_d1 == mme_config.mode_map_config.mode_map[itr].plmn.mcc_digit1) &&
+         (mcc_d2 == mme_config.mode_map_config.mode_map[itr].plmn.mcc_digit2) &&
+         (mcc_d3 == mme_config.mode_map_config.mode_map[itr].plmn.mcc_digit3) &&
+         (mnc_d1 == mme_config.mode_map_config.mode_map[itr].plmn.mnc_digit1) &&
+         (mnc_d2 ==
+          mme_config.mode_map_config.mode_map[itr].plmn.mnc_digit2))) {
+      if (mme_config.mode_map_config.mode_map[itr].plmn.mnc_digit3 != 0xf) {
+        if (mnc_d3 !=
+            mme_config.mode_map_config.mode_map[itr].plmn.mnc_digit3) {
+          continue;
+        }
+      }
+      OAILOG_FUNC_RETURN(module, mme_config.mode_map_config.mode_map[itr].mode);
+    }
+  }
+  // If the plmn is not configured set the default mode as hss + spgw_task.
+  OAILOG_INFO_UE(
+      module, imsi64,
+      "PLMN is not configured. Selecting default mode: SPGW_SUBSCRIBER \n");
+  OAILOG_FUNC_RETURN(
+      module, magma::mconfig::ModeMapItem_FederatedMode_SPGW_SUBSCRIBER);
+}
+

lte/gateway/c/oai/common/common_utility_funs.h

@@ -0,0 +1,15 @@
+#define pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "mme_config.h"
+#include "log.h"
+#include "conversions.h"
+#include "common_defs.h"
+
+int match_fed_mode_map(const char* imsi, log_proto_t module);
+#ifdef __cplusplus
+}
+#endif

lte/gateway/c/oai/tasks/mme_app/mme_app_itti_messaging.h

@@ -131,6 +131,4 @@ void mme_app_itti_sgsap_tmsi_reallocation_comp(
 
 void mme_app_itti_sgsap_ue_activity_ind(
     const char* imsi, const unsigned int imsi_len);
-
-int mme_app_match_fed_mode_map(const uint8_t* imsi, imsi64_t imsi64);
 #endif /* FILE_MME_APP_ITTI_MESSAGING_SEEN */