diff options
| author | Holger Hans Peter Freyther <holger@moiji-mobile.com> | 2013-12-27 17:19:19 +0100 |
|---|---|---|
| committer | Holger Hans Peter Freyther <holger@moiji-mobile.com> | 2013-12-27 17:22:32 +0100 |
| commit | 2147bc4cc989928b6685669d49c79fe12f5ab913 (patch) | |
| tree | 20eb9ea28fa89d84f3132a339a20ad9e5d01e34e | |
| parent | defb10fa62f537cd6e623d3ab1ebd3ebfcf05e06 (diff) | |
periodic/lu: Attempt to implicitly attach a subscriber instead of rejecting
When modern Smartphones receive "Not in VLR". The baseband firmware
apparently does not try to do an IMSI ATTACH but just remains un-happy
and will not connect to the network anymore.
| -rw-r--r-- | openbsc/src/libmsc/gsm_04_08.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c index 63603934b..75e464d5f 100644 --- a/openbsc/src/libmsc/gsm_04_08.c +++ b/openbsc/src/libmsc/gsm_04_08.c @@ -804,6 +804,21 @@ int gsm48_tx_mm_auth_rej(struct gsm_subscriber_connection *conn) return gsm48_tx_simple(conn, GSM48_PDISC_MM, GSM48_MT_MM_AUTH_REJ); } +/* + * At the 30C3 phones miss their periodic update + * interval a lot and then remain unreachable. In case + * we still know the TMSI we can just attach it again. + */ +static void implit_attach(struct gsm_subscriber_connection *conn) +{ + if (conn->subscr->lac != GSM_LAC_RESERVED_DETACHED) + return; + + subscr_update(conn->subscr, conn->bts, + GSM_SUBSCRIBER_UPDATE_ATTACHED); +} + + static int _gsm48_rx_mm_serv_req_sec_cb( unsigned int hooknum, unsigned int event, struct msgb *msg, void *data, void *param) @@ -822,11 +837,13 @@ static int _gsm48_rx_mm_serv_req_sec_cb( case GSM_SECURITY_NOAVAIL: case GSM_SECURITY_ALREADY: rc = gsm48_tx_mm_serv_ack(conn); + implit_attach(conn); break; case GSM_SECURITY_SUCCEEDED: /* nothing to do. CIPHER MODE COMMAND is * implicit CM SERV ACK */ + implit_attach(conn); break; default: @@ -897,10 +914,6 @@ static int gsm48_rx_mm_serv_req(struct gsm_subscriber_connection *conn, struct m if (!subscr) return gsm48_tx_mm_serv_rej(conn, GSM48_REJECT_IMSI_UNKNOWN_IN_HLR); - if (subscr->lac == GSM_LAC_RESERVED_DETACHED) - /* If the subscriber is not attached, reject service */ - return gsm48_tx_mm_serv_rej(conn, - GSM48_REJECT_IMSI_UNKNOWN_IN_VLR); if (!conn->subscr) conn->subscr = subscr; |