osmocom
/
libosmocore
mirror of https://gerrit.osmocom.org/libosmocore
11
0
Fork 0
Code Issues Releases Wiki Activity

import gsm48_decode_lai() function from osmocom-bb/mobile sysinfo.c

This commit is contained in:
Harald Welte 2012-07-13 21:35:13 +02:00
parent e30b6ac5d1
commit 774a9de8b3
2 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/osmocom/gsm/gsm48.h
View File

@ -20,6 +20,8 @@ const char *gsm48_cc_state_name(uint8_t state);
const char *gsm48_cc_msg_name(uint8_t msgtype);
const char *rr_cause_name(uint8_t cause);
int gsm48_decode_lai(struct gsm48_loc_area_id *lai, uint16_t *mcc,
uint16_t *mnc, uint16_t *lac);
void gsm48_generate_lai(struct gsm48_loc_area_id *lai48, uint16_t mcc,
uint16_t mnc, uint16_t lac);
int gsm48_generate_mid_from_tmsi(uint8_t *buf, uint32_t tmsi);

14
src/gsm/gsm48.c
View File

@ -285,6 +285,20 @@ void gsm48_generate_lai(struct gsm48_loc_area_id *lai48, uint16_t mcc,
lai48->lac = htons(lac);
}
int gsm48_decode_lai(struct gsm48_loc_area_id *lai, uint16_t *mcc,
uint16_t *mnc, uint16_t *lac)
{
*mcc = ((lai->digits[0] & 0x0f) << 8)
| (lai->digits[0] & 0xf0)
| (lai->digits[1] & 0x0f);
*mnc = ((lai->digits[2] & 0x0f) << 8)
| (lai->digits[2] & 0xf0)
| ((lai->digits[1] & 0xf0) >> 4);
*lac = ntohs(lai->lac);
return 0;
}
int gsm48_generate_mid_from_tmsi(uint8_t *buf, uint32_t tmsi)
{
uint32_t *tptr = (uint32_t *) &buf[3];