import gsm48_parse_ra() and gprs_tlli_type() from openbsc

This commit is contained in:
Harald Welte 2010-05-01 11:59:42 +02:00
parent 5ba4dc171b
commit a1c4f765ec
5 changed files with 67 additions and 1 deletions

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@ -4,6 +4,14 @@
#include <osmocore/protocol/gsm_04_08.h>
#include <osmocore/gsm48_ie.h>
/* A parsed GPRS routing area */
struct gprs_ra_id {
uint16_t mnc;
uint16_t mcc;
uint16_t lac;
uint8_t rac;
};
extern const struct tlv_definition gsm48_att_tlvdef;
const char *gsm48_cc_state_name(uint8_t state);
const char *gsm48_cc_msg_name(uint8_t msgtype);
@ -18,4 +26,7 @@ int gsm48_generate_mid_from_imsi(uint8_t *buf, const char *imsi);
int gsm48_mi_to_string(char *string, const int str_len,
const uint8_t *mi, const int mi_len);
/* Parse Routeing Area Identifier */
void gsm48_parse_ra(struct gprs_ra_id *raid, const uint8_t *buf);
#endif

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@ -87,5 +87,17 @@ void gsm_fn2gsmtime(struct gsm_time *time, uint32_t fn);
/* Convert from GSM time to frame number */
uint32_t gsm_gsmtime2fn(struct gsm_time *time);
/* GSM TS 03.03 Chapter 2.6 */
enum gprs_tlli_tyoe {
TLLI_LOCAL,
TLLI_FOREIGN,
TLLI_RANDOM,
TLLI_AUXILIARY,
TLLI_RESERVED,
};
/* TS 03.03 Chapter 2.6 */
int gprs_tlli_type(uint32_t tlli);
void generate_backtrace();
#endif

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@ -735,10 +735,17 @@ enum gsm48_bcap_rrq {
GSM48_BCAP_RRQ_DUAL_FR = 3,
};
#define GSM48_TMSI_LEN 5
#define GSM48_MID_TMSI_LEN (GSM48_TMSI_LEN + 2)
#define GSM48_MI_SIZE 32
/* Chapter 10.4.4.15 */
struct gsm48_ra_id {
uint8_t digits[3]; /* MCC + MNC BCD digits */
uint16_t lac; /* Location Area Code */
uint8_t rac; /* Routing Area Code */
} __attribute__ ((packed));
#endif /* PROTO_GSM_04_08_H */

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@ -305,3 +305,24 @@ int gsm48_mi_to_string(char *string, const int str_len, const uint8_t *mi,
return str_cur - string;
}
void gsm48_parse_ra(struct gprs_ra_id *raid, const uint8_t *buf)
{
raid->mcc = (buf[0] & 0xf) * 100;
raid->mcc += (buf[0] >> 4) * 10;
raid->mcc += (buf[1] & 0xf) * 1;
/* I wonder who came up with the stupidity of encoding the MNC
* differently depending on how many digits its decimal number has! */
if ((buf[1] >> 4) == 0xf) {
raid->mnc = (buf[2] & 0xf) * 10;
raid->mnc += (buf[2] >> 4) * 1;
} else {
raid->mnc = (buf[2] & 0xf) * 100;
raid->mnc += (buf[2] >> 4) * 10;
raid->mnc += (buf[1] >> 4) * 1;
}
raid->lac = ntohs(*(uint16_t *)(buf + 3));
raid->rac = buf[5];
}

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@ -359,3 +359,18 @@ uint32_t gsm_gsmtime2fn(struct gsm_time *time)
/* TS 05.02 Chapter 4.3.3 TDMA frame number */
return (51 * ((time->t3 - time->t2 + 26) % 26) + time->t3 + (26 * 51 * time->t1));
}
/* TS 03.03 Chapter 2.6 */
int gprs_tlli_type(uint32_t tlli)
{
if ((tlli & 0xc0000000) == 0xc0000000)
return TLLI_LOCAL;
else if ((tlli & 0xc0000000) == 0x80000000)
return TLLI_FOREIGN;
else if ((tlli & 0xf8000000) == 0x78000000)
return TLLI_RANDOM;
else if ((tlli & 0xf8000000) == 0x70000000)
return TLLI_AUXILIARY;
return TLLI_RESERVED;
}