cellular-infrastructure
/
osmo-bsc
mirror of https://gerrit.osmocom.org/osmo-bsc
9
0
Fork 0
Code Issues Releases Wiki Activity

gsm48: Add a generic MI from classmark+mi extraction. 

This is a generic MI extraction for the MI if it is followed
after a classmark. For the Phase1 Phones the classmark2 is not
four bytes but it might be different. This code can be used
by the CM Service Request handling as well.
This commit is contained in:
Holger Hans Peter Freyther 2010-05-16 01:07:20 +08:00
parent f6903dee89
commit b7b9c1d4d3
2 changed files with 14 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
openbsc/include/openbsc/gsm_04_08.h
View File

@ -52,6 +52,7 @@ int decode_bcd_number(char *output, int output_len, const u_int8_t *bcd_lv,
int h_len);
int send_siemens_mrpci(struct gsm_lchan *lchan, u_int8_t *classmark2_lv);
int gsm48_extract_mi(uint8_t *classmark2, int length, char *mi_string, uint8_t *mi_type);
int gsm48_paging_extract_mi(struct gsm48_pag_resp *pag, int length, char *mi_string, u_int8_t *mi_type);
int gsm48_handle_paging_resp(struct msgb *msg, struct gsm_subscriber *subscr);

19
openbsc/src/gsm_04_08_utils.c
View File

@ -243,23 +243,30 @@ int send_siemens_mrpci(struct gsm_lchan *lchan,
return rsl_siemens_mrpci(lchan, &mrpci);
}
int gsm48_paging_extract_mi(struct gsm48_pag_resp *resp, int length,
char *mi_string, u_int8_t *mi_type)
int gsm48_extract_mi(uint8_t *classmark2_lv, int length, char *mi_string, uint8_t *mi_type)
{
u_int8_t *classmark2_lv = (uint8_t *) &resp->classmark2;
/* Check the size for the classmark */
if (length < 2 + *classmark2_lv)
if (length < 1 + *classmark2_lv)
return -1;
u_int8_t *mi_lv = classmark2_lv + *classmark2_lv + 1;
if (length < 3 + *classmark2_lv + mi_lv[0])
if (length < 2 + *classmark2_lv + mi_lv[0])
return -2;
*mi_type = mi_lv[1] & GSM_MI_TYPE_MASK;
return gsm48_mi_to_string(mi_string, GSM48_MI_SIZE, mi_lv+1, *mi_lv);
}
int gsm48_paging_extract_mi(struct gsm48_pag_resp *resp, int length,
char *mi_string, u_int8_t *mi_type)
{
static const uint32_t classmark_offset =
offsetof(struct gsm48_pag_resp, classmark2);
u_int8_t *classmark2_lv = (uint8_t *) &resp->classmark2;
return gsm48_extract_mi(classmark2_lv, length - classmark_offset,
mi_string, mi_type);
}
int gsm48_handle_paging_resp(struct msgb *msg, struct gsm_subscriber *subscr)
{
struct gsm_bts *bts = msg->lchan->ts->trx->bts;