import gsm48_parse_ra() and gprs_tlli_type() from openbsc

[osmocom-bb.git] / src / gsm48.c

diff --git a/src/gsm48.c b/src/gsm48.c
index 783ff6a..7e51066 100644 (file)
--- 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];
+}