diff options
| author | Daniel Willmann <dwillmann@sysmocom.de> | 2017-03-21 12:25:14 +0100 |
|---|---|---|
| committer | Daniel Willmann <dwillmann@sysmocom.de> | 2018-01-30 18:58:27 +0100 |
| commit | d7e05cedb6f0809f48bea1ae99edb804473464ad (patch) | |
| tree | a2157f5965e1b3fc92faa490e859efcaeb1c8505 /openbsc/src | |
| parent | e87b5a913e833d10afd1ee7775531d74d767740d (diff) | |
libfilter: Also handle detach indications
Change-Id: Iad4e2861f42d5275e2b3057ab2bc43ef43b61cfe
Ticket: SYS#3208
Sponsored-by: On-Waves ehf.
Diffstat (limited to 'openbsc/src')
| -rw-r--r-- | openbsc/src/libfilter/bsc_msg_filter.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/openbsc/src/libfilter/bsc_msg_filter.c b/openbsc/src/libfilter/bsc_msg_filter.c index 115d376cb..ce346a4f1 100644 --- a/openbsc/src/libfilter/bsc_msg_filter.c +++ b/openbsc/src/libfilter/bsc_msg_filter.c @@ -295,6 +295,30 @@ static int _cr_check_pag_resp(void *ctx, return 1; } +static int _cr_check_detach_ind(void *ctx, + uint8_t *data, unsigned int length, char **imsi) +{ + struct gsm48_imsi_detach_ind *ind; + char mi_string[GSM48_MI_SIZE]; + uint8_t mi_type; + + if (length < sizeof(*ind)) { + LOGP(DFILTER, LOGL_ERROR, "IMSI DETACH IND does not fit. Length was %d.\n", length); + return -1; + } + + ind = (struct gsm48_imsi_detach_ind *) data; + mi_type = ind->mi[0] & GSM_MI_TYPE_MASK; + + /* we need to let it pass for now */ + if (mi_type != GSM_MI_TYPE_IMSI) + return 0; + + gsm48_mi_to_string(mi_string, sizeof(mi_string), ind->mi, ind->mi_len); + *imsi = talloc_strdup(ctx, mi_string); + return 1; +} + static int _dt_check_id_resp(struct bsc_filter_request *req, uint8_t *data, unsigned int length, struct bsc_filter_state *state, @@ -357,6 +381,11 @@ int bsc_msg_filter_initial(struct gsm48_hdr *hdr48, size_t hdr48_len, *con_type = FLT_CON_TYPE_PAG_RESP; ret = _cr_check_pag_resp(req->ctx, &hdr48->data[0], hdr48_len - sizeof(*hdr48), imsi); + } else if (proto == GSM48_PDISC_MM && + msg_type == GSM48_MT_MM_IMSI_DETACH_IND) { + *con_type = FLT_CON_TYPE_OTHER; + ret = _cr_check_detach_ind(req->ctx, &hdr48->data[0], + hdr48_len - sizeof(*hdr48), imsi); } else { /* We only want to filter the above, let other things pass */ *con_type = FLT_CON_TYPE_OTHER; |