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libosmocore/src/gsm/gsm48_ie.c

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/*! \file gsm48_ie.c
* GSM Mobile Radio Interface Layer 3 messages.
* 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0. */
/*
* (C) 2008 by Harald Welte <laforge@gnumonks.org>
* (C) 2009-2010 by Andreas Eversberg
*
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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.
*
*/
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/msgb.h>
#include <osmocom/gsm/tlv.h>
#include <osmocom/gsm/mncc.h>
#include <osmocom/core/bitvec.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include <osmocom/gsm/gsm48_ie.h>
/*! \addtogroup gsm0408
* @{
*/
static const char bcd_num_digits[] = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', '*', '#', 'a', 'b', 'c', '\0'
};
/*! Like gsm48_decode_bcd_number2() but with less airtight bounds checking.
* \param[out] output Caller-provided output buffer
* \param[in] output_len sizeof(output)
* \param[in] bcd_lv Length-Value portion of to-be-decoded IE
* \param[in] h_len Length of an optional heder between L and V portion
* \returns 0 in case of success; negative on error */
int gsm48_decode_bcd_number(char *output, int output_len,
const uint8_t *bcd_lv, int h_len)
{
uint8_t in_len = bcd_lv[0];
/* Just assume the input buffer is big enough for the length byte and the following data, so pass in_len + 1 for
* the input buffer size. */
return gsm48_decode_bcd_number2(output, output_len, bcd_lv, in_len + 1, h_len);
}
/*! Decode a 'called/calling/connect party BCD number' as in 10.5.4.7.
* \param[out] output Caller-provided output buffer.
* \param[in] output_len sizeof(output).
* \param[in] bcd_lv Length-Value part of to-be-decoded IE.
* \param[in] input_len Size of the bcd_lv buffer for bounds checking.
* \param[in] h_len Length of an optional header between L and V parts.
* \return 0 in case of success, negative on error.
*
* Errors checked:
* - no or too little input data (-EIO),
* - IE length exceeds input data size (-EINVAL),
* - no or too little output buffer size (-ENOSPC),
* - decoded number exceeds size of the output buffer (-ENOSPC).
*
* The output is guaranteed to be nul terminated iff output_len > 0.
*/
int gsm48_decode_bcd_number2(char *output, size_t output_len,
const uint8_t *bcd_lv, size_t input_len,
size_t h_len)
{
uint8_t in_len;
int i;
bool truncated = false;
if (output_len < 1)
return -ENOSPC;
*output = '\0';
if (input_len < 1)
return -EIO;
in_len = bcd_lv[0];
/* len + 1: the BCD length plus the length byte itself must fit in the input buffer. */
if (input_len < in_len + 1)
return -EINVAL;
for (i = 1 + h_len; i <= in_len; i++) {
/* lower nibble */
if (output_len <= 1) {
truncated = true;
break;
}
*output++ = bcd_num_digits[bcd_lv[i] & 0xf];
output_len--;
/* higher nibble */
if (output_len <= 1) {
/* not truncated if there is exactly one 0xf ('\0') higher nibble remaining */
if (i == in_len && (bcd_lv[i] & 0xf0) == 0xf0) {
break;
}
truncated = true;
break;
}
*output++ = bcd_num_digits[bcd_lv[i] >> 4];
output_len--;
}
if (output_len >= 1)
*output++ = '\0';
/* Indicate whether the output was truncated */
if (truncated)
return -ENOSPC;
return 0;
}
/*! convert a single ASCII character to call-control BCD */
static int asc_to_bcd(const char asc)
{
int i;
for (i = 0; i < ARRAY_SIZE(bcd_num_digits); i++) {
if (bcd_num_digits[i] == asc)
return i;
}
return -EINVAL;
}
/*! convert a ASCII phone number to 'called/calling/connect party BCD number'
* \param[out] bcd_lv Caller-provided output buffer
* \param[in] max_len Maximum Length of \a bcd_lv
* \param[in] h_len Length of an optional heder between L and V portion
* \param[in] input phone number as 0-terminated ASCII
* \returns number of bytes used in \a bcd_lv; negative on error
*
* Depending on a context (e.g. called or calling party BCD number), the
* optional header between L and V parts can contain TON (Type Of Number),
* NPI (Numbering Plan Indication), presentation or screening indicator.
* NOTE: it is up to the caller to initialize this header!
*/
int gsm48_encode_bcd_number(uint8_t *bcd_lv, uint8_t max_len,
int h_len, const char *input)
{
int in_len = strlen(input);
int i;
uint8_t *bcd_cur = bcd_lv + 1 + h_len;
/* two digits per byte, plus type byte */
bcd_lv[0] = in_len/2 + h_len;
if (in_len % 2)
bcd_lv[0]++;
if (bcd_lv[0] > max_len)
return -EIO;
for (i = 0; i < in_len; i++) {
int rc = asc_to_bcd(input[i]);
if (rc < 0)
return rc;
if (i % 2 == 0)
*bcd_cur = rc;
else
*bcd_cur++ |= (rc << 4);
}
/* append padding nibble in case of odd length */
if (i % 2)
*bcd_cur++ |= 0xf0;
/* return how many bytes we used */
return (bcd_cur - bcd_lv);
}
/*! Decode TS 04.08 Bearer Capability IE (10.5.4.5)
* \param[out] bcap Caller-provided memory for decoded output
* \param[in] lv LV portion of TS 04.08 Bearer Capability
* \returns 0 on success; negative on error */
int gsm48_decode_bearer_cap(struct gsm_mncc_bearer_cap *bcap,
const uint8_t *lv)
{
uint8_t in_len = lv[0];
int i, s;
if (in_len < 1)
return -EINVAL;
bcap->speech_ver[0] = -1; /* end of list, of maximum 7 values */
/* octet 3 */
bcap->transfer = lv[1] & 0x07;
bcap->mode = (lv[1] & 0x08) >> 3;
bcap->coding = (lv[1] & 0x10) >> 4;
bcap->radio = (lv[1] & 0x60) >> 5;
switch (bcap->transfer) {
case GSM_MNCC_BCAP_SPEECH:
i = 1;
s = 0;
if ((lv[1] & 0x80) != 0) { /* octet 3a is absent */
switch (bcap->radio) {
case GSM48_BCAP_RRQ_FR_ONLY:
bcap->speech_ver[s++] = GSM48_BCAP_SV_FR;
break;
case GSM48_BCAP_RRQ_DUAL_HR:
bcap->speech_ver[s++] = GSM48_BCAP_SV_HR;
bcap->speech_ver[s++] = GSM48_BCAP_SV_FR;
break;
case GSM48_BCAP_RRQ_DUAL_FR:
bcap->speech_ver[s++] = GSM48_BCAP_SV_FR;
bcap->speech_ver[s++] = GSM48_BCAP_SV_HR;
break;
}
bcap->speech_ver[s] = -1; /* end of list */
return 0;
}
while (!(lv[i] & 0x80)) {
i++; /* octet 3a etc */
if (in_len < i)
return 0;
bcap->speech_ver[s++] = lv[i] & 0x0f;
bcap->speech_ver[s] = -1; /* end of list */
if (i == 2) /* octet 3a */
bcap->speech_ctm = (lv[i] & 0x20) >> 5;
if (s == 7) /* maximum speech versions + end of list */
return 0;
}
break;
case GSM_MNCC_BCAP_UNR_DIG:
case GSM_MNCC_BCAP_AUDIO:
case GSM_MNCC_BCAP_FAX_G3:
i = 1;
while (!(lv[i] & 0x80)) {
i++; /* octet 3a etc */
if (in_len < i)
return 0;
/* ignore them */
}
/* octet 4: skip */
i++;
/* octet 5 */
i++;
if (in_len < i)
return 0;
bcap->data.rate_adaption = (lv[i] >> 3) & 3;
bcap->data.sig_access = lv[i] & 7;
while (!(lv[i] & 0x80)) {
i++; /* octet 5a etc */
if (in_len < i)
return 0;
/* ignore them */
}
/* octet 6 */
i++;
if (in_len < i)
return 0;
bcap->data.async = lv[i] & 1;
if (!(lv[i] & 0x80)) {
i++;
if (in_len < i)
return 0;
/* octet 6a */
bcap->data.nr_stop_bits = ((lv[i] >> 7) & 1) + 1;
if (lv[i] & 0x10)
bcap->data.nr_data_bits = 8;
else
bcap->data.nr_data_bits = 7;
bcap->data.user_rate = lv[i] & 0xf;
if (!(lv[i] & 0x80)) {
i++;
if (in_len < i)
return 0;
/* octet 6b */
bcap->data.parity = lv[i] & 7;
bcap->data.interm_rate = (lv[i] >> 5) & 3;
/* octet 6c */
if (!(lv[i] & 0x80)) {
i++;
if (in_len < i)
return 0;
bcap->data.transp = (lv[i] >> 5) & 3;
bcap->data.modem_type = lv[i] & 0x1F;
}
}
}
break;
default:
i = 1;
while (!(lv[i] & 0x80)) {
i++; /* octet 3a etc */
if (in_len < i)
return 0;
/* ignore them */
}
/* FIXME: implement OCTET 4+ parsing */
break;
}
return 0;
}
/*! Encode TS 04.08 Bearer Capability IE (10.5.4.5)
* \param[out] msg Message Buffer to which IE is to be appended
* \param[in] lv_only Write only LV portion (1) or TLV (0)
* \param[in] bcap Decoded Bearer Capability to be encoded
* \returns 0 on success; negative on error */
int gsm48_encode_bearer_cap(struct msgb *msg, int lv_only,
const struct gsm_mncc_bearer_cap *bcap)
{
uint8_t lv[32 + 1];
int i = 1, s;
lv[1] = bcap->transfer;
lv[1] |= bcap->mode << 3;
lv[1] |= bcap->coding << 4;
lv[1] |= bcap->radio << 5;
switch (bcap->transfer) {
case GSM_MNCC_BCAP_SPEECH:
for (s = 0; bcap->speech_ver[s] >= 0; s++) {
i++; /* octet 3a etc */
lv[i] = bcap->speech_ver[s];
if (i == 2) /* octet 3a */
lv[i] |= bcap->speech_ctm << 5;
}
lv[i] |= 0x80; /* last IE of octet 3 etc */
break;
case GSM48_BCAP_ITCAP_UNR_DIG_INF:
case GSM48_BCAP_ITCAP_3k1_AUDIO:
case GSM48_BCAP_ITCAP_FAX_G3:
lv[i++] |= 0x80; /* last IE of octet 3 etc */
/* octet 4 */
lv[i++] = 0x88;
/* octet 5 */
lv[i++] = 0x80 | ((bcap->data.rate_adaption & 3) << 3)
| (bcap->data.sig_access & 7);
/* octet 6 */
lv[i++] = 0x20 | (bcap->data.async & 1);
/* octet 6a */
lv[i++] = (bcap->data.user_rate & 0xf) |
(bcap->data.nr_data_bits == 8 ? 0x10 : 0x00) |
(bcap->data.nr_stop_bits == 2 ? 0x40 : 0x00);
/* octet 6b */
lv[i++] = (bcap->data.parity & 7) |
((bcap->data.interm_rate & 3) << 5);
/* octet 6c */
lv[i] = 0x80 |
((bcap->data.transp & 3) << 5) |
(bcap->data.modem_type & 0x1f);
break;
default:
return -EINVAL;
}
lv[0] = i;
if (lv_only)
msgb_lv_put(msg, lv[0], lv+1);
else
msgb_tlv_put(msg, GSM48_IE_BEARER_CAP, lv[0], lv+1);
return 0;
}
/*! Decode TS 04.08 Call Control Capabilities IE (10.5.4.5a)
* \param[out] ccap Caller-provided memory for decoded CC capabilities
* \param[in] lv Length-Value of IE
* \returns 0 on success; negative on error */
int gsm48_decode_cccap(struct gsm_mncc_cccap *ccap, const uint8_t *lv)
{
uint8_t in_len = lv[0];
if (in_len < 1)
return -EINVAL;
/* octet 3 */
ccap->dtmf = lv[1] & 0x01;
ccap->pcp = (lv[1] & 0x02) >> 1;
return 0;
}
/*! Encodoe TS 04.08 Call Control Capabilities (10.5.4.5a)
* \param[out] msg Message Buffer to which to append IE (as TLV)
* \param[in] ccap Decoded CC Capabilities to be encoded
* \returns 0 on success; negative on error */
int gsm48_encode_cccap(struct msgb *msg,
const struct gsm_mncc_cccap *ccap)
{
uint8_t lv[2];
lv[0] = 1;
lv[1] = 0;
if (ccap->dtmf)
lv [1] |= 0x01;
if (ccap->pcp)
lv [1] |= 0x02;
msgb_tlv_put(msg, GSM48_IE_CC_CAP, lv[0], lv+1);
return 0;
}
/*! Decode TS 04.08 Called Party BCD Number IE (10.5.4.7)
* \param[out] called Caller-provided memory for decoded number
* \param[in] lv Length-Value portion of IE
* \returns 0 on success; negative on error */
int gsm48_decode_called(struct gsm_mncc_number *called,
const uint8_t *lv)
{
uint8_t in_len = lv[0];
if (in_len < 1)
return -EINVAL;
/* octet 3 */
called->plan = lv[1] & 0x0f;
called->type = (lv[1] & 0x70) >> 4;
/* octet 4..N */
gsm48_decode_bcd_number(called->number, sizeof(called->number), lv, 1);
return 0;
}
/*! Encode TS 04.08 Called Party IE (10.5.4.7)
* \param[out] msg Mesage Buffer to which to append IE (as TLV)
* \param[in] called MNCC Number to encode/append
* \returns 0 on success; negative on error */
int gsm48_encode_called(struct msgb *msg,
const struct gsm_mncc_number *called)
{
uint8_t lv[18];
int ret;
/* octet 3 */
lv[1] = 0x80; /* no extension */
lv[1] |= called->plan;
lv[1] |= called->type << 4;
/* octet 4..N, octet 2 */
ret = gsm48_encode_bcd_number(lv, sizeof(lv), 1, called->number);
if (ret < 0)
return ret;
msgb_tlv_put(msg, GSM48_IE_CALLED_BCD, lv[0], lv+1);
return 0;
}
/*! Decode TS 04.08 Caller ID
* \param[out] callerid Caller-provided memory for decoded number
* \param[in] lv Length-Value portion of IE
* \returns 0 on success; negative on error */
int gsm48_decode_callerid(struct gsm_mncc_number *callerid,
const uint8_t *lv)
{
uint8_t in_len = lv[0];
int i = 1;
if (in_len < 1)
return -EINVAL;
/* octet 3 */
callerid->plan = lv[1] & 0x0f;
callerid->type = (lv[1] & 0x70) >> 4;
/* octet 3a */
if (!(lv[1] & 0x80)) {
callerid->screen = lv[2] & 0x03;
callerid->present = (lv[2] & 0x60) >> 5;
i = 2;
}
/* octet 4..N */
gsm48_decode_bcd_number(callerid->number, sizeof(callerid->number), lv, i);
return 0;
}
/*! Encode TS 04.08 Caller ID IE
* \param[out] msg Mesage Buffer to which to append IE (as TLV)
* \param[in] ie IE Identifier (tag)
* \param[in] max_len maximum generated output in bytes
* \param[in] callerid MNCC Number to encode/append
* \returns 0 on success; negative on error */
int gsm48_encode_callerid(struct msgb *msg, int ie, int max_len,
const struct gsm_mncc_number *callerid)
{
uint8_t lv[max_len - 1];
int h_len = 1;
int ret;
/* octet 3 */
lv[1] = callerid->plan;
lv[1] |= callerid->type << 4;
if (callerid->present || callerid->screen) {
/* octet 3a */
lv[2] = callerid->screen;
lv[2] |= callerid->present << 5;
lv[2] |= 0x80;
h_len++;
} else
lv[1] |= 0x80;
/* octet 4..N, octet 2 */
ret = gsm48_encode_bcd_number(lv, sizeof(lv), h_len, callerid->number);
if (ret < 0)
return ret;
msgb_tlv_put(msg, ie, lv[0], lv+1);
return 0;
}
/*! Decode TS 04.08 Cause IE (10.5.4.11)
* \param[out] cause Caller-provided memory for output
* \param[in] lv LV portion of Cause IE
* \returns 0 on success; negative on error */
int gsm48_decode_cause(struct gsm_mncc_cause *cause,
const uint8_t *lv)
{
uint8_t in_len = lv[0];
int i;
if (in_len < 2)
return -EINVAL;
cause->diag_len = 0;
/* octet 3 */
cause->location = lv[1] & 0x0f;
cause->coding = (lv[1] & 0x60) >> 5;
i = 1;
if (!(lv[i] & 0x80)) {
i++; /* octet 3a */
if (in_len < i+1)
return 0;
cause->rec = 1;
cause->rec_val = lv[i] & 0x7f;
}
i++;
/* octet 4 */
cause->value = lv[i] & 0x7f;
i++;
if (in_len < i) /* no diag */
return 0;
if (in_len - (i-1) > 32) /* maximum 32 octets */
return 0;
/* octet 5-N */
memcpy(cause->diag, lv + i, in_len - (i-1));
cause->diag_len = in_len - (i-1);
return 0;
}
/*! Encode TS 04.08 Cause IE (10.5.4.11)
* \param[out] msg Message Buffer to which to append IE
* \param[in] lv_only Encode as LV (1) or TLV (0)
* \param[in] cause Cause value to be encoded
* \returns 0 on success; negative on error */
int gsm48_encode_cause(struct msgb *msg, int lv_only,
const struct gsm_mncc_cause *cause)
{
uint8_t lv[32+4];
int i;
if (cause->diag_len > 32)
return -EINVAL;
/* octet 3 */
lv[1] = cause->location;
lv[1] |= cause->coding << 5;
i = 1;
if (cause->rec) {
i++; /* octet 3a */
lv[i] = cause->rec_val;
}
lv[i] |= 0x80; /* end of octet 3 */
/* octet 4 */
i++;
lv[i] = 0x80 | cause->value;
/* octet 5-N */
if (cause->diag_len) {
memcpy(lv + i, cause->diag, cause->diag_len);
i += cause->diag_len;
}
lv[0] = i;
if (lv_only)
msgb_lv_put(msg, lv[0], lv+1);
else
msgb_tlv_put(msg, GSM48_IE_CAUSE, lv[0], lv+1);
return 0;
}
/*! Decode TS 04.08 Calling Number IE (10.5.4.9) */
int gsm48_decode_calling(struct gsm_mncc_number *calling,
const uint8_t *lv)
{
return gsm48_decode_callerid(calling, lv);
}
/*! Encode TS 04.08 Calling Number IE (10.5.4.9) */
int gsm48_encode_calling(struct msgb *msg,
const struct gsm_mncc_number *calling)
{
return gsm48_encode_callerid(msg, GSM48_IE_CALLING_BCD, 14, calling);
}
/*! Decode TS 04.08 Connected Number IE (10.5.4.13) */
int gsm48_decode_connected(struct gsm_mncc_number *connected,
const uint8_t *lv)
{
return gsm48_decode_callerid(connected, lv);
}
/*! Encode TS 04.08 Connected Number IE (10.5.4.13) */
int gsm48_encode_connected(struct msgb *msg,
const struct gsm_mncc_number *connected)
{
return gsm48_encode_callerid(msg, GSM48_IE_CONN_BCD, 14, connected);
}
/*! Decode TS 04.08 Redirecting Number IE (10.5.4.21b) */
int gsm48_decode_redirecting(struct gsm_mncc_number *redirecting,
const uint8_t *lv)
{
return gsm48_decode_callerid(redirecting, lv);
}
/*! Encode TS 04.08 Redirecting Number IE (10.5.4.21b) */
int gsm48_encode_redirecting(struct msgb *msg,
const struct gsm_mncc_number *redirecting)
{
return gsm48_encode_callerid(msg, GSM48_IE_REDIR_BCD, 19, redirecting);
}
/*! Decode TS 04.08 Facility IE (10.5.4.15) */
int gsm48_decode_facility(struct gsm_mncc_facility *facility,
const uint8_t *lv)
{
uint8_t in_len = lv[0];
if (in_len < 1)
return -EINVAL;
if (in_len > sizeof(facility->info))
return -EINVAL;
memcpy(facility->info, lv+1, in_len);
facility->len = in_len;
return 0;
}
/*! Encode TS 04.08 Facility IE (10.5.4.15) */
int gsm48_encode_facility(struct msgb *msg, int lv_only,
const struct gsm_mncc_facility *facility)
{
uint8_t lv[GSM_MAX_FACILITY + 1];
if (facility->len < 1 || facility->len > GSM_MAX_FACILITY)
return -EINVAL;
memcpy(lv+1, facility->info, facility->len);
lv[0] = facility->len;
if (lv_only)
msgb_lv_put(msg, lv[0], lv+1);
else
msgb_tlv_put(msg, GSM48_IE_FACILITY, lv[0], lv+1);
return 0;
}
/*! Decode TS 04.08 Notify IE (10.5.4.20) */
int gsm48_decode_notify(int *notify, const uint8_t *v)
{
*notify = v[0] & 0x7f;
return 0;
}
/*! Encode TS 04.08 Notify IE (10.5.4.20) */
int gsm48_encode_notify(struct msgb *msg, int notify)
{
msgb_v_put(msg, notify | 0x80);
return 0;
}
/*! Decode TS 04.08 Signal IE (10.5.4.23) */
int gsm48_decode_signal(int *signal, const uint8_t *v)
{
*signal = v[0];
return 0;
}
/*! Encode TS 04.08 Signal IE (10.5.4.23) */
int gsm48_encode_signal(struct msgb *msg, int signal)
{
msgb_tv_put(msg, GSM48_IE_SIGNAL, signal);
return 0;
}
/*! Decode TS 04.08 Keypad IE (10.5.4.17) */
int gsm48_decode_keypad(int *keypad, const uint8_t *lv)
{
uint8_t in_len = lv[0];
if (in_len < 1)
return -EINVAL;
*keypad = lv[1] & 0x7f;
return 0;
}
/*! Encode TS 04.08 Keypad IE (10.5.4.17) */
int gsm48_encode_keypad(struct msgb *msg, int keypad)
{
msgb_tv_put(msg, GSM48_IE_KPD_FACILITY, keypad);
return 0;
}
/*! Decode TS 04.08 Progress IE (10.5.4.21) */
int gsm48_decode_progress(struct gsm_mncc_progress *progress,
const uint8_t *lv)
{
uint8_t in_len = lv[0];
if (in_len < 2)
return -EINVAL;
progress->coding = (lv[1] & 0x60) >> 5;
progress->location = lv[1] & 0x0f;
progress->descr = lv[2] & 0x7f;
return 0;
}
/*! Encode TS 04.08 Progress IE (10.5.4.21) */
int gsm48_encode_progress(struct msgb *msg, int lv_only,
const struct gsm_mncc_progress *p)
{
uint8_t lv[3];
lv[0] = 2;
lv[1] = 0x80 | ((p->coding & 0x3) << 5) | (p->location & 0xf);
lv[2] = 0x80 | (p->descr & 0x7f);
if (lv_only)
msgb_lv_put(msg, lv[0], lv+1);
else
msgb_tlv_put(msg, GSM48_IE_PROGR_IND, lv[0], lv+1);
return 0;
}
/*! Decode TS 04.08 User-User IE (10.5.4.25) */
int gsm48_decode_useruser(struct gsm_mncc_useruser *uu,
const uint8_t *lv)
{
uint8_t in_len = lv[0];
char *info = uu->info;
int info_len = sizeof(uu->info);
int i;
if (in_len < 1)
return -EINVAL;
uu->proto = lv[1];
for (i = 2; i <= in_len; i++) {
info_len--;
if (info_len <= 1)
break;
*info++ = lv[i];
}
if (info_len >= 1)
*info++ = '\0';
return 0;
}
/*! Encode TS 04.08 User-User IE (10.5.4.25) */
int gsm48_encode_useruser(struct msgb *msg, int lv_only,
const struct gsm_mncc_useruser *uu)
{
uint8_t lv[GSM_MAX_USERUSER + 2];
if (strlen(uu->info) > GSM_MAX_USERUSER)
return -EINVAL;
lv[0] = 1 + strlen(uu->info);
lv[1] = uu->proto;
memcpy(lv + 2, uu->info, strlen(uu->info));
if (lv_only)
msgb_lv_put(msg, lv[0], lv+1);
else
msgb_tlv_put(msg, GSM48_IE_USER_USER, lv[0], lv+1);
return 0;
}
/*! Decode TS 04.08 SS Version IE (10.5.4.24) */
int gsm48_decode_ssversion(struct gsm_mncc_ssversion *ssv,
const uint8_t *lv)
{
uint8_t in_len = lv[0];
if (in_len < 1 || in_len > sizeof(ssv->info))
return -EINVAL;
memcpy(ssv->info, lv + 1, in_len);
ssv->len = in_len;
return 0;
}
/*! Encode TS 04.08 SS Version IE (10.5.4.24) */
int gsm48_encode_ssversion(struct msgb *msg,
const struct gsm_mncc_ssversion *ssv)
{
uint8_t lv[GSM_MAX_SSVERSION + 1];
if (ssv->len > GSM_MAX_SSVERSION)
return -EINVAL;
lv[0] = ssv->len;
memcpy(lv + 1, ssv->info, ssv->len);
msgb_tlv_put(msg, GSM48_IE_SS_VERS, lv[0], lv+1);
return 0;
}
/* decode 'more data' does not require a function, because it has no value */
/*! Encode TS 04.08 More Data IE (10.5.4.19) */
int gsm48_encode_more(struct msgb *msg)
{
uint8_t *ie;
ie = msgb_put(msg, 1);
ie[0] = GSM48_IE_MORE_DATA;
return 0;
}
static int32_t smod(int32_t n, int32_t m)
{
int32_t res;
res = n % m;
if (res <= 0)
res += m;
return res;
}
/*! Decode TS 04.08 Cell Channel Description IE (10.5.2.1b) and other frequency lists
* \param[out] f Caller-provided output memory, an array of 1024 elements
* \param[in] cd Cell Channel Description IE
* \param[in] len Length of \a cd in bytes
* \returns 0 on success; negative on error */
int gsm48_decode_freq_list(struct gsm_sysinfo_freq *f,
const uint8_t *cd, uint8_t len,
uint8_t mask, uint8_t frqt)
{
int i;
/* NOTES:
*
* The Range format uses "SMOD" computation.
* e.g. "n SMOD m" equals "((n - 1) % m) + 1"
* A cascade of multiple SMOD computations is simpified:
* "(n SMOD m) SMOD o" equals "(((n - 1) % m) % o) + 1"
*
* The Range format uses 16 octets of data in SYSTEM INFORMATION.
* When used in dedicated messages, the length can be less.
* In this case the ranges are decoded for all frequencies that
* fit in the block of given length.
*/
/* tabula rasa */
for (i = 0; i < 1024; i++)
f[i].mask &= ~frqt;
/* 00..XXX. */
if ((cd[0] & 0xc0 & mask) == 0x00) {
/* Bit map 0 format */
if (len < 16)
return -EINVAL;
for (i = 1; i <= 124; i++)
if ((cd[15 - ((i-1) >> 3)] & (1 << ((i-1) & 7))))
f[i].mask |= frqt;
return 0;
}
/* 10..0XX. */
if ((cd[0] & 0xc8 & mask) == 0x80) {
/* Range 1024 format */
uint16_t w[17]; /* 1..16 */
struct gsm48_range_1024 *r = (struct gsm48_range_1024 *)cd;
if (len < 2)
return -EINVAL;
memset(w, 0, sizeof(w));
if (r->f0)
f[0].mask |= frqt;
w[1] = (r->w1_hi << 8) | r->w1_lo;
if (len >= 4)
w[2] = (r->w2_hi << 1) | r->w2_lo;
if (len >= 5)
w[3] = (r->w3_hi << 2) | r->w3_lo;
if (len >= 6)
w[4] = (r->w4_hi << 2) | r->w4_lo;
if (len >= 7)
w[5] = (r->w5_hi << 2) | r->w5_lo;
if (len >= 8)
w[6] = (r->w6_hi << 2) | r->w6_lo;
if (len >= 9)
w[7] = (r->w7_hi << 2) | r->w7_lo;
if (len >= 10)
w[8] = (r->w8_hi << 1) | r->w8_lo;
if (len >= 10)
w[9] = r->w9;
if (len >= 11)
w[10] = r->w10;
if (len >= 12)
w[11] = (r->w11_hi << 6) | r->w11_lo;
if (len >= 13)
w[12] = (r->w12_hi << 5) | r->w12_lo;
if (len >= 14)
w[13] = (r->w13_hi << 4) | r->w13_lo;
if (len >= 15)
w[14] = (r->w14_hi << 3) | r->w14_lo;
if (len >= 16)
w[15] = (r->w15_hi << 2) | r->w15_lo;
if (len >= 16)
w[16] = r->w16;
if (w[1])
f[w[1]].mask |= frqt;
if (w[2])
f[smod(w[1] - 512 + w[2], 1023)].mask |= frqt;
if (w[3])
f[smod(w[1] + w[3], 1023)].mask |= frqt;
if (w[4])
f[smod(w[1] - 512 + smod(w[2] - 256 + w[4], 511), 1023)].mask |= frqt;
if (w[5])
f[smod(w[1] + smod(w[3] - 256 + w[5], 511), 1023)].mask |= frqt;
if (w[6])
f[smod(w[1] - 512 + smod(w[2] + w[6], 511), 1023)].mask |= frqt;
if (w[7])
f[smod(w[1] + smod(w[3] + w[7], 511), 1023)].mask |= frqt;
if (w[8])
f[smod(w[1] - 512 + smod(w[2] - 256 + smod(w[4] - 128 + w[8] , 255), 511), 1023)].mask |= frqt;
if (w[9])
f[smod(w[1] + smod(w[3] - 256 + smod(w[5] - 128 + w[9] , 255), 511), 1023)].mask |= frqt;
if (w[10])
f[smod(w[1] - 512 + smod(w[2] + smod(w[6] - 128 + w[10], 255), 511), 1023)].mask |= frqt;
if (w[11])
f[smod(w[1] + smod(w[3] + smod(w[7] - 128 + w[11], 255), 511), 1023)].mask |= frqt;
if (w[12])
f[smod(w[1] - 512 + smod(w[2] - 256 + smod(w[4] + w[12], 255), 511), 1023)].mask |= frqt;
if (w[13])
f[smod(w[1] + smod(w[3] - 256 + smod(w[5] + w[13], 255), 511), 1023)].mask |= frqt;
if (w[14])
f[smod(w[1] - 512 + smod(w[2] + smod(w[6] + w[14], 255), 511), 1023)].mask |= frqt;
if (w[15])
f[smod(w[1] + smod(w[3] + smod(w[7] + w[15], 255), 511), 1023)].mask |= frqt;
if (w[16])
f[smod(w[1] - 512 + smod(w[2] - 256 + smod(w[4] - 128 + smod(w[8] - 64 + w[16], 127), 255), 511), 1023)].mask |= frqt;
return 0;
}
/* 10..100. */
if ((cd[0] & 0xce & mask) == 0x88) {
/* Range 512 format */
uint16_t w[18]; /* 1..17 */
struct gsm48_range_512 *r = (struct gsm48_range_512 *)cd;
if (len < 4)
return -EINVAL;
memset(w, 0, sizeof(w));
w[0] = (r->orig_arfcn_hi << 9) | (r->orig_arfcn_mid << 1) | r->orig_arfcn_lo;
w[1] = (r->w1_hi << 2) | r->w1_lo;
if (len >= 5)
w[2] = (r->w2_hi << 2) | r->w2_lo;
if (len >= 6)
w[3] = (r->w3_hi << 2) | r->w3_lo;
if (len >= 7)
w[4] = (r->w4_hi << 1) | r->w4_lo;
if (len >= 7)
w[5] = r->w5;
if (len >= 8)
w[6] = r->w6;
if (len >= 9)
w[7] = (r->w7_hi << 6) | r->w7_lo;
if (len >= 10)
w[8] = (r->w8_hi << 4) | r->w8_lo;
if (len >= 11)
w[9] = (r->w9_hi << 2) | r->w9_lo;
if (len >= 11)
w[10] = r->w10;
if (len >= 12)
w[11] = r->w11;
if (len >= 13)
w[12] = (r->w12_hi << 4) | r->w12_lo;
if (len >= 14)
w[13] = (r->w13_hi << 2) | r->w13_lo;
if (len >= 14)
w[14] = r->w14;
if (len >= 15)
w[15] = r->w15;
if (len >= 16)
w[16] = (r->w16_hi << 3) | r->w16_lo;
if (len >= 16)
w[17] = r->w17;
f[w[0]].mask |= frqt;
if (w[1])
f[(w[0] + w[1]) % 1024].mask |= frqt;
if (w[2])
f[(w[0] + smod(w[1] - 256 + w[2], 511)) % 1024].mask |= frqt;
if (w[3])
f[(w[0] + smod(w[1] + w[3], 511)) % 1024].mask |= frqt;
if (w[4])
f[(w[0] + smod(w[1] - 256 + smod(w[2] - 128 + w[4], 255), 511)) % 1024].mask |= frqt;
if (w[5])
f[(w[0] + smod(w[1] + smod(w[3] - 128 + w[5], 255), 511)) % 1024].mask |= frqt;
if (w[6])
f[(w[0] + smod(w[1] - 256 + smod(w[2] + w[6], 255), 511)) % 1024].mask |= frqt;
if (w[7])
f[(w[0] + smod(w[1] + smod(w[3] + w[7], 255), 511)) % 1024].mask |= frqt;
if (w[8])
f[(w[0] + smod(w[1] - 256 + smod(w[2] - 128 + smod(w[4] - 64 + w[8] , 127), 255), 511)) % 1024].mask |= frqt;
if (w[9])
f[(w[0] + smod(w[1] + smod(w[3] - 128 + smod(w[5] - 64 + w[9] , 127), 255), 511)) % 1024].mask |= frqt;
if (w[10])
f[(w[0] + smod(w[1] - 256 + smod(w[2] + smod(w[6] - 64 + w[10], 127), 255), 511)) % 1024].mask |= frqt;
if (w[11])
f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 64 + w[11], 127), 255), 511)) % 1024].mask |= frqt;
if (w[12])
f[(w[0] + smod(w[1] - 256 + smod(w[2] - 128 + smod(w[4] + w[12], 127), 255), 511)) % 1024].mask |= frqt;
if (w[13])
f[(w[0] + smod(w[1] + smod(w[3] - 128 + smod(w[5] + w[13], 127), 255), 511)) % 1024].mask |= frqt;
if (w[14])
f[(w[0] + smod(w[1] - 256 + smod(w[2] + smod(w[6] + w[14], 127), 255), 511)) % 1024].mask |= frqt;
if (w[15])
f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] + w[15], 127), 255), 511)) % 1024].mask |= frqt;
if (w[16])
f[(w[0] + smod(w[1] - 256 + smod(w[2] - 128 + smod(w[4] - 64 + smod(w[8] - 32 + w[16], 63), 127), 255), 511)) % 1024].mask |= frqt;
if (w[17])
f[(w[0] + smod(w[1] + smod(w[3] - 128 + smod(w[5] - 64 + smod(w[9] - 32 + w[17], 63), 127), 255), 511)) % 1024].mask |= frqt;
return 0;
}
/* 10..101. */
if ((cd[0] & 0xce & mask) == 0x8a) {
/* Range 256 format */
uint16_t w[22]; /* 1..21 */
struct gsm48_range_256 *r = (struct gsm48_range_256 *)cd;
if (len < 4)
return -EINVAL;
memset(w, 0, sizeof(w));
w[0] = (r->orig_arfcn_hi << 9) | (r->orig_arfcn_mid << 1) | r->orig_arfcn_lo;
w[1] = (r->w1_hi << 1) | r->w1_lo;
if (len >= 4)
w[2] = r->w2;
if (len >= 5)
w[3] = r->w3;
if (len >= 6)
w[4] = (r->w4_hi << 5) | r->w4_lo;
if (len >= 7)
w[5] = (r->w5_hi << 3) | r->w5_lo;
if (len >= 8)
w[6] = (r->w6_hi << 1) | r->w6_lo;
if (len >= 8)
w[7] = r->w7;
if (len >= 9)
w[8] = (r->w8_hi << 4) | r->w8_lo;
if (len >= 10)
w[9] = (r->w9_hi << 1) | r->w9_lo;
if (len >= 10)
w[10] = r->w10;
if (len >= 11)
w[11] = (r->w11_hi << 3) | r->w11_lo;
if (len >= 11)
w[12] = r->w12;
if (len >= 12)
w[13] = r->w13;
if (len >= 13)
w[14] = (r->w14_hi << 2) | r->w14_lo;
if (len >= 13)
w[15] = r->w15;
if (len >= 14)
w[16] = (r->w16_hi << 3) | r->w16_lo;
if (len >= 14)
w[17] = r->w17;
if (len >= 15)
w[18] = (r->w18_hi << 3) | r->w18_lo;
if (len >= 15)
w[19] = r->w19;
if (len >= 16)
w[20] = (r->w20_hi << 3) | r->w20_lo;
if (len >= 16)
w[21] = r->w21;
f[w[0]].mask |= frqt;
if (w[1])
f[(w[0] + w[1]) % 1024].mask |= frqt;
if (w[2])
f[(w[0] + smod(w[1] - 128 + w[2], 255)) % 1024].mask |= frqt;
if (w[3])
f[(w[0] + smod(w[1] + w[3], 255)) % 1024].mask |= frqt;
if (w[4])
f[(w[0] + smod(w[1] - 128 + smod(w[2] - 64 + w[4], 127), 255)) % 1024].mask |= frqt;
if (w[5])
f[(w[0] + smod(w[1] + smod(w[3] - 64 + w[5], 127), 255)) % 1024].mask |= frqt;
if (w[6])
f[(w[0] + smod(w[1] - 128 + smod(w[2] + w[6], 127), 255)) % 1024].mask |= frqt;
if (w[7])
f[(w[0] + smod(w[1] + smod(w[3] + w[7], 127), 255)) % 1024].mask |= frqt;
if (w[8])
f[(w[0] + smod(w[1] - 128 + smod(w[2] - 64 + smod(w[4] - 32 + w[8] , 63), 127), 255)) % 1024].mask |= frqt;
if (w[9])
f[(w[0] + smod(w[1] + smod(w[3] - 64 + smod(w[5] - 32 + w[9] , 63), 127), 255)) % 1024].mask |= frqt;
if (w[10])
f[(w[0] + smod(w[1] - 128 + smod(w[2] + smod(w[6] - 32 + w[10], 63), 127), 255)) % 1024].mask |= frqt;
if (w[11])
f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 32 + w[11], 63), 127), 255)) % 1024].mask |= frqt;
if (w[12])
f[(w[0] + smod(w[1] - 128 + smod(w[2] - 64 + smod(w[4] + w[12], 63), 127), 255)) % 1024].mask |= frqt;
if (w[13])
f[(w[0] + smod(w[1] + smod(w[3] - 64 + smod(w[5] + w[13], 63), 127), 255)) % 1024].mask |= frqt;
if (w[14])
f[(w[0] + smod(w[1] - 128 + smod(w[2] + smod(w[6] + w[14], 63), 127), 255)) % 1024].mask |= frqt;
if (w[15])
f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] + w[15], 63), 127), 255)) % 1024].mask |= frqt;
if (w[16])
f[(w[0] + smod(w[1] - 128 + smod(w[2] - 64 + smod(w[4] - 32 + smod(w[8] - 16 + w[16], 31), 63), 127), 255)) % 1024].mask |= frqt;
if (w[17])
f[(w[0] + smod(w[1] + smod(w[3] - 64 + smod(w[5] - 32 + smod(w[9] - 16 + w[17], 31), 63), 127), 255)) % 1024].mask |= frqt;
if (w[18])
f[(w[0] + smod(w[1] - 128 + smod(w[2] + smod(w[6] - 32 + smod(w[10] - 16 + w[18], 31), 63), 127), 255)) % 1024].mask |= frqt;
if (w[19])
f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 32 + smod(w[11] - 16 + w[19], 31), 63), 127), 255)) % 1024].mask |= frqt;
if (w[20])
f[(w[0] + smod(w[1] - 128 + smod(w[2] - 64 + smod(w[4] + smod(w[12] - 16 + w[20], 31), 63), 127), 255)) % 1024].mask |= frqt;
if (w[21])
f[(w[0] + smod(w[1] + smod(w[3] - 64 + smod(w[5] + smod(w[13] - 16 + w[21], 31), 63), 127), 255)) % 1024].mask |= frqt;
return 0;
}
/* 10..110. */
if ((cd[0] & 0xce & mask) == 0x8c) {
/* Range 128 format */
uint16_t w[29]; /* 1..28 */
struct gsm48_range_128 *r = (struct gsm48_range_128 *)cd;
if (len < 3)
return -EINVAL;
memset(w, 0, sizeof(w));
w[0] = (r->orig_arfcn_hi << 9) | (r->orig_arfcn_mid << 1) | r->orig_arfcn_lo;
w[1] = r->w1;
if (len >= 4)
w[2] = r->w2;
if (len >= 5)
w[3] = (r->w3_hi << 4) | r->w3_lo;
if (len >= 6)
w[4] = (r->w4_hi << 1) | r->w4_lo;
if (len >= 6)
w[5] = r->w5;
if (len >= 7)
w[6] = (r->w6_hi << 3) | r->w6_lo;
if (len >= 7)
w[7] = r->w7;
if (len >= 8)
w[8] = r->w8;
if (len >= 8)
w[9] = r->w9;
if (len >= 9)
w[10] = r->w10;
if (len >= 9)
w[11] = r->w11;
if (len >= 10)
w[12] = r->w12;
if (len >= 10)
w[13] = r->w13;
if (len >= 11)
w[14] = r->w14;
if (len >= 11)
w[15] = r->w15;
if (len >= 12)
w[16] = r->w16;
if (len >= 12)
w[17] = r->w17;
if (len >= 13)
w[18] = (r->w18_hi << 1) | r->w18_lo;
if (len >= 13)
w[19] = r->w19;
if (len >= 13)
w[20] = r->w20;
if (len >= 14)
w[21] = (r->w21_hi << 2) | r->w21_lo;
if (len >= 14)
w[22] = r->w22;
if (len >= 14)
w[23] = r->w23;
if (len >= 15)
w[24] = r->w24;
if (len >= 15)
w[25] = r->w25;
if (len >= 16)
w[26] = (r->w26_hi << 1) | r->w26_lo;
if (len >= 16)
w[27] = r->w27;
if (len >= 16)
w[28] = r->w28;
f[w[0]].mask |= frqt;
if (w[1])
f[(w[0] + w[1]) % 1024].mask |= frqt;
if (w[2])
f[(w[0] + smod(w[1] - 64 + w[2], 127)) % 1024].mask |= frqt;
if (w[3])
f[(w[0] + smod(w[1] + w[3], 127)) % 1024].mask |= frqt;
if (w[4])
f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + w[4], 63), 127)) % 1024].mask |= frqt;
if (w[5])
f[(w[0] + smod(w[1] + smod(w[3] - 32 + w[5], 63), 127)) % 1024].mask |= frqt;
if (w[6])
f[(w[0] + smod(w[1] - 64 + smod(w[2] + w[6], 63), 127)) % 1024].mask |= frqt;
if (w[7])
f[(w[0] + smod(w[1] + smod(w[3] + w[7], 63), 127)) % 1024].mask |= frqt;
if (w[8])
f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] - 16 + w[8] , 31), 63), 127)) % 1024].mask |= frqt;
if (w[9])
f[(w[0] + smod(w[1] + smod(w[3] - 32 + smod(w[5] - 16 + w[9] , 31), 63), 127)) % 1024].mask |= frqt;
if (w[10])
f[(w[0] + smod(w[1] - 64 + smod(w[2] + smod(w[6] - 16 + w[10], 31), 63), 127)) % 1024].mask |= frqt;
if (w[11])
f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 16 + w[11], 31), 63), 127)) % 1024].mask |= frqt;
if (w[12])
f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] + w[12], 31), 63), 127)) % 1024].mask |= frqt;
if (w[13])
f[(w[0] + smod(w[1] + smod(w[3] - 32 + smod(w[5] + w[13], 31), 63), 127)) % 1024].mask |= frqt;
if (w[14])
f[(w[0] + smod(w[1] - 64 + smod(w[2] + smod(w[6] + w[14], 31), 63), 127)) % 1024].mask |= frqt;
if (w[15])
f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] + w[15], 31), 63), 127)) % 1024].mask |= frqt;
if (w[16])
f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] - 16 + smod(w[8] - 8 + w[16], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[17])
f[(w[0] + smod(w[1] + smod(w[3] - 32 + smod(w[5] - 16 + smod(w[9] - 8 + w[17], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[18])
f[(w[0] + smod(w[1] - 64 + smod(w[2] + smod(w[6] - 16 + smod(w[10] - 8 + w[18], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[19])
f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 16 + smod(w[11] - 8 + w[19], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[20])
f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] + smod(w[12] - 8 + w[20], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[21])
f[(w[0] + smod(w[1] + smod(w[3] - 32 + smod(w[5] + smod(w[13] - 8 + w[21], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[22])
f[(w[0] + smod(w[1] - 64 + smod(w[2] + smod(w[6] + smod(w[14] - 8 + w[22], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[23])
f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] + smod(w[15] - 8 + w[23], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[24])
f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] - 16 + smod(w[8] + w[24], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[25])
f[(w[0] + smod(w[1] + smod(w[3] - 32 + smod(w[5] - 16 + smod(w[9] + w[25], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[26])
f[(w[0] + smod(w[1] - 64 + smod(w[2] + smod(w[6] - 16 + smod(w[10] + w[26], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[27])
f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 16 + smod(w[11] + w[27], 15), 31), 63), 127)) % 1024].mask |= frqt;
if (w[28])
f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] + smod(w[12] + w[28], 15), 31), 63), 127)) % 1024].mask |= frqt;
return 0;
}
/* 10..111. */
if ((cd[0] & 0xce & mask) == 0x8e) {
/* Variable bitmap format (can be any length >= 3) */
uint16_t orig = 0;
struct gsm48_var_bit *r = (struct gsm48_var_bit *)cd;
if (len < 3)
return -EINVAL;
orig = (r->orig_arfcn_hi << 9) | (r->orig_arfcn_mid << 1) | r->orig_arfcn_lo;
f[orig].mask |= frqt;
for (i = 1; 2 + (i >> 3) < len; i++)
if ((cd[2 + (i >> 3)] & (0x80 >> (i & 7))))
f[(orig + i) % 1024].mask |= frqt;
return 0;
}
return 0;
}
/*! Decode 3GPP TS 24.008 Mobile Station Classmark 3 (10.5.1.7).
* \param[out] classmark3_out user provided memory to store decoded classmark3.
* \param[in] classmark3 pointer to memory that contains the raw classmark bits.
* \param[in] classmark3_len length in bytes of the memory where classmark3 points to.
* \returns 0 on success; negative on error. */
int gsm48_decode_classmark3(struct gsm48_classmark3 *classmark3_out,
const uint8_t *classmark3, size_t classmark3_len)
{
struct bitvec bv;
uint8_t data[255];
struct gsm48_classmark3 *cm3 = classmark3_out;
/* if cm3 gets extended by spec, it will be truncated, but 255 bytes
* should be more than enough. */
if (classmark3_len > sizeof(data))
classmark3_len = sizeof(data);
memset(&bv, 0, sizeof(bv));
memset(data, 0, sizeof(data));
memset(classmark3_out, 0, sizeof(*classmark3_out));
memcpy(data, classmark3, classmark3_len);
bv.data = (uint8_t*) data;
bv.data_len = sizeof(data);
/* Parse bit vector, see also: 3GPP TS 24.008, section 10.5.1.7 */
bitvec_get_uint(&bv, 1);
cm3->mult_band_supp = bitvec_get_uint(&bv, 3);
switch (cm3->mult_band_supp) {
case 0x00:
cm3->a5_bits = bitvec_get_uint(&bv, 4);
break;
case 0x05:
case 0x06:
cm3->a5_bits = bitvec_get_uint(&bv, 4);
cm3->assoc_radio_cap_2 = bitvec_get_uint(&bv, 4);
cm3->assoc_radio_cap_1 = bitvec_get_uint(&bv, 4);
break;
case 0x01:
case 0x02:
case 0x04:
cm3->a5_bits = bitvec_get_uint(&bv, 4);
bitvec_get_uint(&bv, 4);
cm3->assoc_radio_cap_1 = bitvec_get_uint(&bv, 4);
break;
default:
return -1;
}
cm3->r_support.present = bitvec_get_uint(&bv, 1);
if (cm3->r_support.present)
cm3->r_support.r_gsm_assoc_radio_cap = bitvec_get_uint(&bv, 3);
cm3->hscsd_mult_slot_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->hscsd_mult_slot_cap.present)
cm3->hscsd_mult_slot_cap.mslot_class = bitvec_get_uint(&bv, 5);
cm3->ucs2_treatment = bitvec_get_uint(&bv, 1);
cm3->extended_meas_cap = bitvec_get_uint(&bv, 1);
cm3->ms_meas_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->ms_meas_cap.present) {
cm3->ms_meas_cap.sms_value = bitvec_get_uint(&bv, 4);
cm3->ms_meas_cap.sm_value = bitvec_get_uint(&bv, 4);
}
cm3->ms_pos_method_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->ms_pos_method_cap.present)
cm3->ms_pos_method_cap.method = bitvec_get_uint(&bv, 5);
cm3->ecsd_multislot_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->ecsd_multislot_cap.present)
cm3->ecsd_multislot_cap.mslot_class = bitvec_get_uint(&bv, 5);
cm3->psk8_struct.present = bitvec_get_uint(&bv, 1);
if (cm3->psk8_struct.present) {
cm3->psk8_struct.mod_cap = bitvec_get_uint(&bv, 1);
cm3->psk8_struct.rf_pwr_cap_1.present = bitvec_get_uint(&bv, 1);
if (cm3->psk8_struct.rf_pwr_cap_1.present) {
cm3->psk8_struct.rf_pwr_cap_1.value =
bitvec_get_uint(&bv, 2);
}
cm3->psk8_struct.rf_pwr_cap_2.present = bitvec_get_uint(&bv, 1);
if (cm3->psk8_struct.rf_pwr_cap_2.present) {
cm3->psk8_struct.rf_pwr_cap_2.value =
bitvec_get_uint(&bv, 2);
}
}
cm3->gsm_400_bands_supp.present = bitvec_get_uint(&bv, 1);
if (cm3->gsm_400_bands_supp.present) {
cm3->gsm_400_bands_supp.value = bitvec_get_uint(&bv, 2);
if (cm3->gsm_400_bands_supp.value == 0x00)
return -1;
cm3->gsm_400_bands_supp.assoc_radio_cap =
bitvec_get_uint(&bv, 4);
}
cm3->gsm_850_assoc_radio_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->gsm_850_assoc_radio_cap.present)
cm3->gsm_850_assoc_radio_cap.value = bitvec_get_uint(&bv, 4);
cm3->gsm_1900_assoc_radio_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->gsm_1900_assoc_radio_cap.present)
cm3->gsm_1900_assoc_radio_cap.value = bitvec_get_uint(&bv, 4);
cm3->umts_fdd_rat_cap = bitvec_get_uint(&bv, 1);
cm3->umts_tdd_rat_cap = bitvec_get_uint(&bv, 1);
cm3->cdma200_rat_cap = bitvec_get_uint(&bv, 1);
cm3->dtm_gprs_multislot_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->dtm_gprs_multislot_cap.present) {
cm3->dtm_gprs_multislot_cap.mslot_class = bitvec_get_uint(&bv, 2);
cm3->dtm_gprs_multislot_cap.single_slot_dtm =
bitvec_get_uint(&bv, 1);
cm3->dtm_gprs_multislot_cap.dtm_egprs_multislot_cap.present =
bitvec_get_uint(&bv, 1);
if (cm3->dtm_gprs_multislot_cap.dtm_egprs_multislot_cap.present)
cm3->dtm_gprs_multislot_cap.dtm_egprs_multislot_cap.
mslot_class = bitvec_get_uint(&bv, 2);
}
/* Release 4 starts here. */
cm3->single_band_supp.present = bitvec_get_uint(&bv, 1);
if (cm3->single_band_supp.present)
cm3->single_band_supp.value = bitvec_get_uint(&bv, 4);
cm3->gsm_750_assoc_radio_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->gsm_750_assoc_radio_cap.present)
cm3->gsm_750_assoc_radio_cap.value = bitvec_get_uint(&bv, 4);
cm3->umts_1_28_mcps_tdd_rat_cap = bitvec_get_uint(&bv, 1);
cm3->geran_feature_package = bitvec_get_uint(&bv, 1);
cm3->extended_dtm_gprs_multislot_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->extended_dtm_gprs_multislot_cap.present) {
cm3->extended_dtm_gprs_multislot_cap.mslot_class =
bitvec_get_uint(&bv, 2);
cm3->extended_dtm_gprs_multislot_cap.
extended_dtm_egprs_multislot_cap.present =
bitvec_get_uint(&bv, 1);
if (cm3->extended_dtm_gprs_multislot_cap.
extended_dtm_egprs_multislot_cap.present)
cm3->extended_dtm_gprs_multislot_cap.
extended_dtm_egprs_multislot_cap.mslot_class =
bitvec_get_uint(&bv, 2);
}
/* Release 5 starts here */
cm3->high_multislot_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->high_multislot_cap.present)
cm3->high_multislot_cap.value = bitvec_get_uint(&bv, 2);
/* This used to be the GERAN Iu mode support bit, but the newer spec
* releases say that it should not be used (always zero), however
* we will just ignore tha state of this bit. */
bitvec_get_uint(&bv, 1);
cm3->geran_feature_package_2 = bitvec_get_uint(&bv, 1);
cm3->gmsk_multislot_power_prof = bitvec_get_uint(&bv, 2);
cm3->psk8_multislot_power_prof = bitvec_get_uint(&bv, 2);
/* Release 6 starts here */
cm3->t_gsm_400_bands_supp.present = bitvec_get_uint(&bv, 1);
if (cm3->t_gsm_400_bands_supp.present) {
cm3->t_gsm_400_bands_supp.value = bitvec_get_uint(&bv, 2);
cm3->t_gsm_400_bands_supp.assoc_radio_cap =
bitvec_get_uint(&bv, 4);
}
/* This used to be T-GSM 900 associated radio capability, but the
* newer spec releases say that this bit should not be used, but if
* it is used by some MS anyway we must assume that there is data
* we have to override. */
if (bitvec_get_uint(&bv, 1))
bitvec_get_uint(&bv, 4);
cm3->dl_advanced_rx_perf = bitvec_get_uint(&bv, 2);
cm3->dtm_enhancements_cap = bitvec_get_uint(&bv, 1);
cm3->dtm_gprs_high_multislot_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->dtm_gprs_high_multislot_cap.present) {
cm3->dtm_gprs_high_multislot_cap.mslot_class =
bitvec_get_uint(&bv, 3);
cm3->dtm_gprs_high_multislot_cap.offset_required =
bitvec_get_uint(&bv, 1);
cm3->dtm_gprs_high_multislot_cap.dtm_egprs_high_multislot_cap.
present = bitvec_get_uint(&bv, 1);
if (cm3->dtm_gprs_high_multislot_cap.
dtm_egprs_high_multislot_cap.present)
cm3->dtm_gprs_high_multislot_cap.
dtm_egprs_high_multislot_cap.mslot_class =
bitvec_get_uint(&bv, 3);
}
cm3->repeated_acch_capability = bitvec_get_uint(&bv, 1);
/* Release 7 starts here */
cm3->gsm_710_assoc_radio_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->gsm_710_assoc_radio_cap.present)
cm3->gsm_710_assoc_radio_cap.value = bitvec_get_uint(&bv, 4);
cm3->t_gsm_810_assoc_radio_cap.present = bitvec_get_uint(&bv, 1);
if (cm3->t_gsm_810_assoc_radio_cap.present)
cm3->t_gsm_810_assoc_radio_cap.value = bitvec_get_uint(&bv, 4);
cm3->ciphering_mode_setting_cap = bitvec_get_uint(&bv, 1);
cm3->add_pos_cap = bitvec_get_uint(&bv, 1);
/* Release 8 starts here */
cm3->e_utra_fdd_supp = bitvec_get_uint(&bv, 1);
cm3->e_utra_tdd_supp = bitvec_get_uint(&bv, 1);
cm3->e_utra_meas_rep_supp = bitvec_get_uint(&bv, 1);
cm3->prio_resel_supp = bitvec_get_uint(&bv, 1);
/* Release 9 starts here */
cm3->utra_csg_cells_rep = bitvec_get_uint(&bv, 1);
cm3->vamos_level = bitvec_get_uint(&bv, 2);
/* Release 10 starts here */
cm3->tighter_capability = bitvec_get_uint(&bv, 2);
cm3->sel_ciph_dl_sacch = bitvec_get_uint(&bv, 1);
/* Release 11 starts here */
cm3->cs_ps_srvcc_geran_utra = bitvec_get_uint(&bv, 2);
cm3->cs_ps_srvcc_geran_eutra = bitvec_get_uint(&bv, 2);
cm3->geran_net_sharing = bitvec_get_uint(&bv, 1);
cm3->e_utra_wb_rsrq_meas_supp = bitvec_get_uint(&bv, 1);
/* Release 12 starts here */
cm3->er_band_support = bitvec_get_uint(&bv, 1);
cm3->utra_mult_band_ind_supp = bitvec_get_uint(&bv, 1);
cm3->e_utra_mult_band_ind_supp = bitvec_get_uint(&bv, 1);
cm3->extended_tsc_set_cap_supp = bitvec_get_uint(&bv, 1);
/* Late addition of a release 11 feature */
cm3->extended_earfcn_val_range = bitvec_get_uint(&bv, 1);
return 0;
}
/*! @} */
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