diff options
Diffstat (limited to 'src/libmsc/gsm_04_80.c')
| -rw-r--r-- | src/libmsc/gsm_04_80.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/libmsc/gsm_04_80.c b/src/libmsc/gsm_04_80.c index 502848f0e..e3547f41d 100644 --- a/src/libmsc/gsm_04_80.c +++ b/src/libmsc/gsm_04_80.c @@ -86,3 +86,31 @@ int msc_send_ussd_release_complete(struct ran_conn *conn, return -1; return msc_tx_dtap(conn, msg); } + +int msc_send_ussd_release_complete_cause(struct ran_conn *conn, + uint8_t transaction_id, + uint8_t cause_loc, uint8_t cause_val) +{ + struct msgb *msg; + uint8_t *cause_ie; + + msg = gsm0480_create_release_complete(transaction_id); + if (!msg) + return -1; + + /* Encode cause IE (see GSM 04.08, section 10.5.4.11) + * with fixed length (2 bytes of TL, 2 bytes of payload). + * NOTE: we don't use gsm48_encode_cause() API because + * it wants gsm_mncc_cause struct from us. */ + cause_ie = msgb_put(msg, 2 + 2); + cause_ie[0] = GSM48_IE_CAUSE; + cause_ie[1] = 2; + + /* Coding standard defined for the GSM PLMNs, + * location and cause: as given by caller, + * no extension, no diagnostics. */ + cause_ie[2] = (1 << 7) | (0x03 << 5) | (cause_loc & 0x0f); + cause_ie[3] = (1 << 7) | cause_val; + + return msc_tx_dtap(conn, msg); +} |