Fix issue for SUPI conversion

src/common/smf.h

@@ -46,6 +46,7 @@ typedef struct {
   char data[SUPI_DIGITS_MAX + 1];
 } supi_t;
 
+// TODO: Move to conversions
 static void smf_string_to_supi(supi_t* const supi, char const* const supi_str) {
   // strncpy(supi->data, supi_str, SUPI_DIGITS_MAX + 1);
   memcpy((void*) supi->data, (void*) supi_str, SUPI_DIGITS_MAX + 1);
@@ -77,6 +78,13 @@ static uint64_t smf_supi_to_u64(supi_t supi) {
   return uint_supi;
 }
 
+static std::string smf_supi64_to_string(const supi64_t& supi) {
+  std::string supi_str = std::to_string(supi);
+  uint8_t padded_len   = SUPI_DIGITS_MAX - supi_str.length();
+  for (int i = 0; i < padded_len; i++) supi_str = "0" + supi_str;
+  return supi_str;
+}
+
 typedef struct s_nssai  // section 28.4, TS23.003
 {
   const uint8_t HASH_SEED   = 17;

src/smf_app/smf_sbi.cpp

@@ -859,7 +859,8 @@ bool smf_sbi::get_sm_data(
       std::string(inet_ntoa(*((struct in_addr*) &smf_cfg.udm_addr.ipv4_addr))) +
       ":" + std::to_string(smf_cfg.udm_addr.port) + NUDM_SDM_BASE +
       smf_cfg.udm_addr.api_version +
-      fmt::format(NUDM_SDM_GET_SM_DATA_URL, std::to_string(supi)) + query_str;
+      fmt::format(NUDM_SDM_GET_SM_DATA_URL, smf_supi64_to_string(supi)) +
+      query_str;
 
   Logger::smf_sbi().debug("UDM's URL: %s ", url.c_str());