diff options
| author | Harald Welte <laforge@gnumonks.org> | 2015-12-26 08:42:31 +0100 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2015-12-26 08:42:31 +0100 |
| commit | 37704d907db906dec6f64adb138489aa896bd3f7 (patch) | |
| tree | b8ff2dc6d7372b9f2faa79ed3a1616ef207cf997 | |
| parent | 8c572fee2a123344b698e42aba779a490a7be453 (diff) | |
ranap_common.c: Add ranap_parse_lai()
| -rw-r--r-- | src/ranap_common.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/ranap_common.c b/src/ranap_common.c index 3d8b808..445dd85 100644 --- a/src/ranap_common.c +++ b/src/ranap_common.c @@ -21,6 +21,7 @@ #include <stdint.h> #include <osmocom/core/msgb.h> +#include <osmocom/gsm/gsm48.h> #include "ranap_common.h" #include "hnbgw.h" @@ -491,3 +492,28 @@ RANAP_ProtocolIE_FieldPair_t *ranap_new_ie_pair(RANAP_ProtocolIE_ID_t id, return buff; } + +int ranap_parse_lai(struct gprs_ra_id *ra_id, const RANAP_LAI_t *lai) +{ + uint8_t *ptr = lai->pLMNidentity.buf; + + /* TS 25.413 9.2.3.55 */ + if (lai->pLMNidentity.size != 3) + return -1; + + ra_id->mcc = (ptr[0] & 0xF) * 100 + + (ptr[0] >> 4) * 10 + + (ptr[1] & 0xF); + ra_id->mnc = (ptr[2] & 0xF) + + (ptr[2] >> 4) * 10; + if ((ptr[1] >> 4) != 0xF) + ra_id->mnc += (ptr[1] >> 4) * 100; + + ra_id->lac = asn1str_to_u16(&lai->lAC); + + /* TS 25.413 9.2.3.6 */ + if (ra_id->lac == 0 || ra_id->lac == 0xfffe) + return -1; + + return 0; +} |