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filter: Remove bsc_connection from the filter API 

Remove the last occurence of NAT datastructures in the filtering
module and add the ctx to the filter request structure.
This commit is contained in:
Holger Hans Peter Freyther 2015-04-05 19:20:09 +02:00
parent c09f8a3b7f
commit 4e8176d0c9
3 changed files with 37 additions and 37 deletions
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16
openbsc/include/openbsc/bsc_msg_filter.h
View File

@ -10,9 +10,6 @@
struct vty;
struct gsm48_hdr;
/* TODO: remove */
struct bsc_connection;
struct bsc_filter_reject_cause {
int lu_reject_cause;
int cm_reject_cause;
@ -61,6 +58,15 @@ struct bsc_filter_state {
int imsi_checked;
};
struct bsc_filter_request {
void *ctx;
struct rb_root *black_list;
struct llist_head *access_lists;
const char *local_lst_name;
const char *global_lst_name;
int bsc_nr;
};
int bsc_filter_barr_adapt(void *ctx, struct rb_root *rbtree, const struct osmo_config_list *);
int bsc_filter_barr_find(struct rb_root *root, const char *imsi, int *cm, int *lu);
@ -69,11 +75,11 @@ int bsc_filter_barr_find(struct rb_root *root, const char *imsi, int *cm, int *l
* Content filtering.
*/
int bsc_msg_filter_initial(struct gsm48_hdr *hdr, size_t size,
struct bsc_connection *bsc,
struct bsc_filter_request *req,
int *con_type, char **imsi,
struct bsc_filter_reject_cause *cause);
int bsc_msg_filter_data(struct gsm48_hdr *hdr, size_t size,
struct bsc_connection *bsc,
struct bsc_filter_request *req,
struct bsc_filter_state *state,
struct bsc_filter_reject_cause *cause);

40
openbsc/src/libfilter/bsc_msg_filter.c
View File

@ -38,14 +38,6 @@
#include <osmocom/sccp/sccp.h>
struct filter_request {
struct rb_root *black_list;
struct llist_head *access_lists;
const char *local_lst_name;
const char *global_lst_name;
int bsc_nr;
};
int bsc_filter_barr_find(struct rb_root *root, const char *imsi, int *cm, int *lu)
{
struct bsc_filter_barr_entry *n;
@ -150,7 +142,7 @@ static int lst_check_deny(struct bsc_msg_acc_lst *lst, const char *mi_string,
}
/* apply white/black list */
static int auth_imsi(struct filter_request *req,
static int auth_imsi(struct bsc_filter_request *req,
const char *imsi,
struct bsc_filter_reject_cause *cause)
{
@ -306,7 +298,7 @@ static int _cr_check_pag_resp(void *ctx,
return 1;
}
static int _dt_check_id_resp(void *ctx, struct filter_request *req,
static int _dt_check_id_resp(struct bsc_filter_request *req,
uint8_t *data, unsigned int length,
struct bsc_filter_state *state,
struct bsc_filter_reject_cause *cause)
@ -331,18 +323,17 @@ static int _dt_check_id_resp(void *ctx, struct filter_request *req,
return 0;
state->imsi_checked = 1;
state->imsi = talloc_strdup(ctx, mi_string);
state->imsi = talloc_strdup(req->ctx, mi_string);
return auth_imsi(req, mi_string, cause);
}
/* Filter out CR data... */
int bsc_msg_filter_initial(struct gsm48_hdr *hdr48, size_t hdr48_len,
struct bsc_connection *bsc,
struct bsc_filter_request *req,
int *con_type,
char **imsi, struct bsc_filter_reject_cause *cause)
{
struct filter_request req;
int ret = 0;
uint8_t msg_type, proto;
@ -356,18 +347,18 @@ int bsc_msg_filter_initial(struct gsm48_hdr *hdr48, size_t hdr48_len,
if (proto == GSM48_PDISC_MM &&
msg_type == GSM48_MT_MM_LOC_UPD_REQUEST) {
*con_type = NAT_CON_TYPE_LU;
ret = _cr_check_loc_upd(bsc, &hdr48->data[0],
ret = _cr_check_loc_upd(req->ctx, &hdr48->data[0],
hdr48_len - sizeof(*hdr48), imsi);
} else if (proto == GSM48_PDISC_MM &&
msg_type == GSM48_MT_MM_CM_SERV_REQ) {
*con_type = NAT_CON_TYPE_CM_SERV_REQ;
ret = _cr_check_cm_serv_req(bsc, &hdr48->data[0],
ret = _cr_check_cm_serv_req(req->ctx, &hdr48->data[0],
hdr48_len - sizeof(*hdr48),
con_type, imsi);
} else if (proto == GSM48_PDISC_RR &&
msg_type == GSM48_MT_RR_PAG_RESP) {
*con_type = NAT_CON_TYPE_PAG_RESP;
ret = _cr_check_pag_resp(bsc, &hdr48->data[0],
ret = _cr_check_pag_resp(req->ctx, &hdr48->data[0],
hdr48_len - sizeof(*hdr48), imsi);
} else {
/* We only want to filter the above, let other things pass */
@ -384,20 +375,14 @@ int bsc_msg_filter_initial(struct gsm48_hdr *hdr48, size_t hdr48_len,
return -1;
/* now check the imsi */
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 auth_imsi(&req, *imsi, cause);
return auth_imsi(req, *imsi, cause);
}
int bsc_msg_filter_data(struct gsm48_hdr *hdr48, size_t len,
struct bsc_connection *bsc,
struct bsc_filter_request *req,
struct bsc_filter_state *state,
struct bsc_filter_reject_cause *cause)
{
struct filter_request req;
uint8_t msg_type, proto;
cause->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
@ -411,11 +396,6 @@ int bsc_msg_filter_data(struct gsm48_hdr *hdr48, size_t len,
if (proto != GSM48_PDISC_MM || msg_type != GSM48_MT_MM_ID_RESP)
return 0;
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 _dt_check_id_resp(bsc, &req, &hdr48->data[0],
return _dt_check_id_resp(req, &hdr48->data[0],
len - sizeof(*hdr48), state, cause);
}

18
openbsc/src/osmo-bsc_nat/bsc_nat_filter.c
View File

@ -35,6 +35,7 @@ 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;
@ -77,7 +78,13 @@ int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg,
}
hdr48 = (struct gsm48_hdr *) TLVP_VAL(&tp, GSM0808_IE_LAYER_3_INFORMATION);
return bsc_msg_filter_initial(hdr48, hdr48_len, bsc, con_type, imsi, cause);
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,
@ -86,6 +93,7 @@ int bsc_nat_filter_dt(struct bsc_connection *bsc, struct msgb *msg,
{
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;
@ -101,5 +109,11 @@ int bsc_nat_filter_dt(struct bsc_connection *bsc, struct msgb *msg,
if (!hdr48)
return -1;
return bsc_msg_filter_data(hdr48, len, bsc, &con->filter_state, cause);
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_data(hdr48, len, &req, &con->filter_state, cause);
}