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/*
*
* oFono - Open Source Telephony
*
* Copyright (C) 2008-2009 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <glib.h>
#include "simutil.h"
#include "util.h"
/* Parse ASN.1 Basic Encoding Rules TLVs per ISO/IEC 7816 */
const guint8 *ber_tlv_find_by_tag(const guint8 *pdu, guint8 in_tag,
int in_len, int *out_len)
{
guint8 tag;
int len;
const guint8 *end = pdu + in_len;
do {
while (pdu < end && (*pdu == 0x00 || *pdu == 0xff))
pdu ++;
if (pdu == end)
break;
tag = *pdu ++;
if (!(0x1f & ~tag))
while (pdu < end && (*pdu ++ & 0x80));
if (pdu == end)
break;
for (len = 0; pdu + 1 < end && (*pdu & 0x80);
len = (len | (*pdu ++ & 0x7f)) << 7);
if (*pdu & 0x80)
break;
len |= *pdu ++;
if (tag == in_tag && pdu + len <= end) {
if (out_len)
*out_len = len;
return pdu;
}
pdu += len;
} while (pdu < end);
return NULL;
}
char *sim_network_name_parse(const unsigned char *buffer, int length,
gboolean *add_ci)
{
char *ret = NULL;
unsigned char *endp;
unsigned char dcs;
int i;
gboolean ci = FALSE;
if (length < 1)
return NULL;
dcs = *buffer ++;
length --;
/* "The MS should add the letters for the Country's Initials and a
* separator (e.g. a space)" */
if (is_bit_set(dcs, 4))
ci = TRUE;
switch (dcs & (7 << 4)) {
case 0x00:
endp = memchr(buffer, 0xff, length);
if (endp)
length = endp - buffer;
ret = convert_gsm_to_utf8(buffer, length,
NULL, NULL, 0xff);
break;
case 0x10:
if ((length % 2) == 1) {
if (buffer[length - 1] != 0xff)
return NULL;
length = length - 1;
}
for (i = 0; i < length; i += 2)
if (buffer[i] == 0xff && buffer[i + 1] == 0xff)
break;
ret = g_convert(buffer, length, "UTF-8//TRANSLIT", "UCS-2BE",
NULL, NULL, NULL);
break;
}
if (add_ci)
*add_ci = ci;
return ret;
}
struct sim_pnn_operator *sim_pnn_operator_parse(const guint8 *tlv, int length)
{
const char *name;
int namelength;
gboolean add_ci;
struct sim_pnn_operator *oper;
name = ber_tlv_find_by_tag(tlv, 0x43, length, &namelength);
if (!name || !namelength)
return NULL;
oper = g_new0(struct sim_pnn_operator, 1);
oper->longname = sim_network_name_parse(name, namelength,
&oper->long_ci);
name = ber_tlv_find_by_tag(tlv, 0x45, length, &namelength);
if (name && namelength)
oper->shortname = sim_network_name_parse(name, namelength,
&oper->short_ci);
name = ber_tlv_find_by_tag(tlv, 0x80, length, &namelength);
if (name && namelength)
oper->info = sim_string_to_utf8(name, namelength);
return oper;
}
void sim_pnn_operator_free(struct sim_pnn_operator *oper)
{
g_free(oper->info);
g_free(oper->shortname);
g_free(oper->longname);
}
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