126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include "TLVEncoder.h"
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#include "TLVDecoder.h"
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#include "AccessPointName.h"
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int decode_access_point_name(AccessPointName *accesspointname, uint8_t iei, uint8_t *buffer, uint32_t len)
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{
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int decoded = 0;
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uint8_t ielen = 0;
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int decode_result;
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if (iei > 0) {
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CHECK_IEI_DECODER(iei, *buffer);
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decoded++;
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}
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ielen = *(buffer + decoded);
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decoded++;
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CHECK_LENGTH_DECODER(len - decoded, ielen);
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if ((decode_result = decode_octet_string(&accesspointname->accesspointnamevalue, ielen, buffer + decoded, len - decoded)) < 0)
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return decode_result;
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else
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decoded += decode_result;
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#if defined (NAS_DEBUG)
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dump_access_point_name_xml(accesspointname, iei);
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#endif
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return decoded;
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}
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int encode_access_point_name(AccessPointName *accesspointname, uint8_t iei, uint8_t *buffer, uint32_t len)
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{
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uint8_t *lenPtr;
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uint32_t encoded = 0;
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int encode_result;
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OctetString apn_encoded;
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uint32_t length_index;
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uint32_t index;
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uint32_t index_copy;
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/* Checking IEI and pointer */
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CHECK_PDU_POINTER_AND_LENGTH_ENCODER(buffer, ACCESS_POINT_NAME_MINIMUM_LENGTH, len);
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#if defined (NAS_DEBUG)
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dump_access_point_name_xml(accesspointname, iei);
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#endif
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if (iei > 0) {
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*buffer = iei;
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encoded++;
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}
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lenPtr = (buffer + encoded);
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encoded ++;
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apn_encoded.length = 0;
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apn_encoded.value = calloc(1, ACCESS_POINT_NAME_MAXIMUM_LENGTH);
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index = 0; // index on original APN string
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length_index = 0; // marker where to write partial length
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index_copy = 1;
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while ((accesspointname->accesspointnamevalue.value[index] != 0) && (index < accesspointname->accesspointnamevalue.length)) {
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if (accesspointname->accesspointnamevalue.value[index] == '.') {
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apn_encoded.value[length_index] = index_copy - length_index - 1;
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length_index = index_copy;
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index_copy = length_index + 1;
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} else {
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apn_encoded.value[index_copy] = accesspointname->accesspointnamevalue.value[index];
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index_copy++;
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}
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index++;
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}
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apn_encoded.value[length_index] = index_copy - length_index - 1;
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apn_encoded.length = index_copy;
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if ((encode_result = encode_octet_string(&apn_encoded, buffer + encoded, len - encoded)) < 0) {
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free(apn_encoded.value);
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return encode_result;
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} else
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encoded += encode_result;
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*lenPtr = encoded - 1 - ((iei > 0) ? 1 : 0);
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free(apn_encoded.value);
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return encoded;
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}
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void dump_access_point_name_xml(AccessPointName *accesspointname, uint8_t iei)
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{
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printf("<Access Point Name>\n");
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if (iei > 0)
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/* Don't display IEI if = 0 */
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printf(" <IEI>0x%X</IEI>\n", iei);
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printf("%s</Access Point Name>\n",
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dump_octet_string_xml(&accesspointname->accesspointnamevalue));
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}
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