diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gsm48.c | 21 | ||||
| -rw-r--r-- | src/gsm_utils.c | 15 |
2 files changed, 36 insertions, 0 deletions
diff --git a/src/gsm48.c b/src/gsm48.c index 783ff6a5..7e510664 100644 --- a/src/gsm48.c +++ b/src/gsm48.c @@ -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]; +} diff --git a/src/gsm_utils.c b/src/gsm_utils.c index 593dd5c9..b392fd37 100644 --- a/src/gsm_utils.c +++ b/src/gsm_utils.c @@ -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; +} |