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/*
* Copyright (C) 2019,2020 by Sukchan Lee <acetcom@gmail.com>
*
* This file is part of Open5GS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "ogs-nas-eps.h"
void ogs_nas_eps_imsi_to_bcd(
const ogs_nas_mobile_identity_imsi_t *imsi, uint8_t imsi_len, char *bcd)
{
int bcd_len;
ogs_assert(imsi && imsi_len);
bcd[0] = '0' + imsi->digit1;
bcd[1] = '0' + imsi->digit2;
bcd[2] = '0' + imsi->digit3;
bcd[3] = '0' + imsi->digit4;
bcd[4] = '0' + imsi->digit5;
bcd[5] = '0' + imsi->digit6;
bcd[6] = '0' + imsi->digit7;
bcd[7] = '0' + imsi->digit8;
bcd[8] = '0' + imsi->digit9;
bcd[9] = '0' + imsi->digit10;
bcd[10] = '0' + imsi->digit11;
bcd[11] = '0' + imsi->digit12;
bcd[12] = '0' + imsi->digit13;
bcd[13] = '0' + imsi->digit14;
bcd[14] = '0' + imsi->digit15;
bcd_len = imsi_len * 2 - 1;
if (!imsi->odd_even) { /* if bcd length is even */
if (imsi->digit15 != 0xf)
ogs_warn("Spec warning : bcd[%d] = 0x%x, 0x%x",
bcd_len-1, imsi->digit15, bcd[bcd_len-1]);
(bcd_len)--;
}
bcd[bcd_len] = 0;
}
void ogs_nas_imsi_to_buffer(
const ogs_nas_mobile_identity_imsi_t *imsi, uint8_t imsi_len,
uint8_t *buf, uint8_t *buf_len)
{
buf[0] = ((('0' + imsi->digit2) << 4) & 0xf0) |
(('0' + imsi->digit1) & 0x0f);
buf[1] = ((('0' + imsi->digit4) << 4) & 0xf0) |
(('0' + imsi->digit3) & 0x0f);
buf[2] = ((('0' + imsi->digit6) << 4) & 0xf0) |
(('0' + imsi->digit5) & 0x0f);
buf[3] = ((('0' + imsi->digit8) << 4) & 0xf0) |
(('0' + imsi->digit7) & 0x0f);
buf[4] = ((('0' + imsi->digit10) << 4) & 0xf0) |
(('0' + imsi->digit9) & 0x0f);
buf[5] = ((('0' + imsi->digit12) << 4) & 0xf0) |
(('0' + imsi->digit11) & 0x0f);
buf[6] = ((('0' + imsi->digit14) << 4) & 0xf0) |
(('0' + imsi->digit13) & 0x0f);
buf[7] = ((('0' + imsi->digit15)) & 0x0f);
*buf_len = imsi_len;
if (!imsi->odd_even) { /* if imsi length is even */
(*buf_len)--;
if ((buf[*buf_len] & 0xf) != 0xf)
ogs_warn("Spec warning : buf[%d] = 0x%x", *buf_len, buf[*buf_len]);
}
}
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