feat: add conf2uedata tool for generating .*.nvram

This patch adds the conf2uedata tool for generating .ue.nvram* .ue.emm.nvram*
and .usim.nvram* files from a textual configuration file.

The configuration file define most usefull values like plmns, mnc, mcc, msin, K,
OPc for several users.
The files generated will always ends with a number corresponding to the user
entry in the configuration file.

This breaks oai5g because other script have not be updated for using
conf2uedata.
This breaks also the at_nas_ue command.

Examples of configuration files are in openair3/NAS/TOOLS/

openair3/NAS/COMMON/UTIL/memory.c

@@ -103,6 +103,30 @@ char* memory_get_path(const char* dirname, const char* filename)
   return data_filename;
 }
 
+char* memory_get_path_from_ueid(const char* dirname, const char* filename, int ueid)
+{
+  /* Get non-volatile data directory */
+  const char* path = getenv(dirname);
+  char buffer[2048];
+
+  if (path == NULL) {
+    path = getenv(DEFAULT_NAS_PATH);
+  }
+
+  if (path == NULL) {
+    LOG_TRACE(WARNING, "MEMORY  - %s and %s environment variables are not defined trying local directory", dirname, DEFAULT_NAS_PATH);
+    path = ".";
+  }
+
+  /* Append non-volatile data file name */
+  if ( snprintf(buffer, sizeof(buffer), "%s/%s%d", path, filename, ueid) < 0 ) {
+    return NULL;
+  }
+
+  return strdup(buffer);
+}
+
+
 /****************************************************************************
  **                                                                        **
  ** Name:  memory_read()                                             **

openair3/NAS/COMMON/UTIL/memory.h

@@ -58,6 +58,8 @@ Description Memory access utilities
 
 char* memory_get_path(const char* dirname, const char* filename);
 
+char* memory_get_path_from_ueid(const char* dirname, const char* filename, int ueid);
+
 int memory_read(const char* datafile, void* data, size_t size);
 
 int memory_write(const char* datafile, const void* data, size_t size);