diff options
Diffstat (limited to 'src/osmo-bsc_nat/bsc_nat_filter.c')
| -rw-r--r-- | src/osmo-bsc_nat/bsc_nat_filter.c | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/src/osmo-bsc_nat/bsc_nat_filter.c b/src/osmo-bsc_nat/bsc_nat_filter.c deleted file mode 100644 index e73529097..000000000 --- a/src/osmo-bsc_nat/bsc_nat_filter.c +++ /dev/null @@ -1,119 +0,0 @@ -/* - * (C) 2010-2015 by Holger Hans Peter Freyther <zecke@selfish.org> - * (C) 2010-2012 by On-Waves - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <openbsc/bsc_nat.h> -#include <openbsc/bsc_nat_sccp.h> -#include <openbsc/bsc_msg_filter.h> -#include <openbsc/debug.h> - -#include <osmocom/gsm/gsm0808.h> - -#include <osmocom/gsm/protocol/gsm_08_08.h> -#include <osmocom/gsm/protocol/gsm_04_11.h> - -#include <osmocom/sccp/sccp.h> - -/* Filter out CR data... */ -int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg, - struct bsc_nat_parsed *parsed, int *con_type, - char **imsi, struct bsc_filter_reject_cause *cause) -{ - struct bsc_filter_request req; - struct tlv_parsed tp; - struct gsm48_hdr *hdr48; - int hdr48_len; - int len; - - *con_type = FLT_CON_TYPE_NONE; - cause->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED; - cause->lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED; - *imsi = NULL; - - if (parsed->gsm_type != BSS_MAP_MSG_COMPLETE_LAYER_3) { - LOGP(DNAT, LOGL_ERROR, - "Rejecting CR message due wrong GSM Type %d\n", parsed->gsm_type); - return -1; - } - - /* the parsed has had some basic l3 length check */ - len = msg->l3h[1]; - if (msgb_l3len(msg) - 3 < len) { - LOGP(DNAT, LOGL_ERROR, - "The CR Data has not enough space...\n"); - return -1; - } - - msg->l4h = &msg->l3h[3]; - len -= 1; - - tlv_parse(&tp, gsm0808_att_tlvdef(), msg->l4h, len, 0, 0); - - if (!TLVP_PRESENT(&tp, GSM0808_IE_LAYER_3_INFORMATION)) { - LOGP(DNAT, LOGL_ERROR, "CR Data does not contain layer3 information.\n"); - return -1; - } - - hdr48_len = TLVP_LEN(&tp, GSM0808_IE_LAYER_3_INFORMATION); - - if (hdr48_len < sizeof(*hdr48)) { - LOGP(DNAT, LOGL_ERROR, "GSM48 header does not fit.\n"); - return -1; - } - - hdr48 = (struct gsm48_hdr *) TLVP_VAL(&tp, GSM0808_IE_LAYER_3_INFORMATION); - req.ctx = bsc; - req.black_list = &bsc->nat->imsi_black_list; - req.access_lists = &bsc->nat->access_lists; - req.local_lst_name = bsc->cfg->acc_lst_name; - req.global_lst_name = bsc->nat->acc_lst_name; - req.bsc_nr = bsc->cfg->nr; - return bsc_msg_filter_initial(hdr48, hdr48_len, &req, con_type, imsi, cause); -} - -int bsc_nat_filter_dt(struct bsc_connection *bsc, struct msgb *msg, - struct nat_sccp_connection *con, struct bsc_nat_parsed *parsed, - struct bsc_filter_reject_cause *cause) -{ - uint32_t len; - struct gsm48_hdr *hdr48; - struct bsc_filter_request req; - - cause->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED; - cause->lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED; - - if (con->filter_state.imsi_checked) - return 0; - - /* only care about DTAP messages */ - if (parsed->bssap != BSSAP_MSG_DTAP) - return 0; - - hdr48 = bsc_unpack_dtap(parsed, msg, &len); - if (!hdr48) - return -1; - - req.ctx = con; - req.black_list = &bsc->nat->imsi_black_list; - req.access_lists = &bsc->nat->access_lists; - req.local_lst_name = bsc->cfg->acc_lst_name; - req.global_lst_name = bsc->nat->acc_lst_name; - req.bsc_nr = bsc->cfg->nr; - return bsc_msg_filter_data(hdr48, len, &req, &con->filter_state, cause); -} |