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

gsm0480: refactor gsm0480_decode_ss_request 

Change-Id: Iba734db97ab516f8fce816c4e4225b97b93619f1
This commit is contained in:
Vadim Yanitskiy 2018-01-17 03:42:16 +06:00 committed by Harald Welte
parent fd744ceeae
commit f07c58cb36
1 changed files with 14 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
src/gsm/gsm0480.c
View File

@ -255,17 +255,24 @@ int gsm0480_decode_ussd_request(const struct gsm48_hdr *hdr, uint16_t len,
int gsm0480_decode_ss_request(const struct gsm48_hdr *hdr, uint16_t len,
struct ss_request *req)
{
int rc = 0;
uint8_t pdisc;
if (gsm48_hdr_pdisc(hdr) == GSM48_PDISC_NC_SS) {
req->transaction_id = hdr->proto_discr & 0x70;
rc = parse_ss(hdr, len - sizeof(*hdr), req);
/**
* Check Protocol Discriminator
* see TS GSM 04.07 and GSM 04.80
*/
pdisc = gsm48_hdr_pdisc(hdr);
if (pdisc != GSM48_PDISC_NC_SS) {
LOGP(0, LOGL_ERROR, "Dropping message with "
"unsupported pdisc=%02x\n", pdisc);
return 0;
}
if (!rc)
LOGP(0, LOGL_DEBUG, "Error occurred while parsing received SS!\n");
/* GSM 04.80 3.3 Transaction Identifier */
req->transaction_id = hdr->proto_discr & 0x70;
return rc;
/* Parse SS request */
return parse_ss(hdr, len - sizeof(*hdr), req);
}
static int parse_ss(const struct gsm48_hdr *hdr, uint16_t len, struct ss_request *req)