Osmocom's Base Station Controller for 2G mobile networks https://osmocom.org/projects/osmobsc
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osmo-bsc/include/openbsc/bsc_msg_filter.h

108 lines
2.4 KiB

#pragma once
#include <osmocom/core/msgb.h>
#include <osmocom/core/msgfile.h>
#include <osmocom/core/linuxrbtree.h>
#include <osmocom/core/linuxlist.h>
#include <regex.h>
struct vty;
struct gsm48_hdr;
struct bsc_filter_reject_cause {
int lu_reject_cause;
int cm_reject_cause;
};
struct bsc_filter_barr_entry {
struct rb_node node;
char *imsi;
int cm_reject_cause;
int lu_reject_cause;
};
enum bsc_filter_acc_ctr {
ACC_LIST_LOCAL_FILTER,
ACC_LIST_GLOBAL_FILTER,
};
struct bsc_msg_acc_lst {
struct llist_head list;
/* counter */
struct rate_ctr_group *stats;
/* the name of the list */
const char *name;
struct llist_head fltr_list;
};
struct bsc_msg_acc_lst_entry {
struct llist_head list;
/* the filter */
char *imsi_allow;
regex_t imsi_allow_re;
char *imsi_deny;
regex_t imsi_deny_re;
/* reject reasons for the access lists */
int cm_reject_cause;
int lu_reject_cause;
};
enum {
FLT_CON_TYPE_NONE,
FLT_CON_TYPE_LU,
FLT_CON_TYPE_CM_SERV_REQ,
FLT_CON_TYPE_PAG_RESP,
FLT_CON_TYPE_SSA,
FLT_CON_TYPE_LOCAL_REJECT,
FLT_CON_TYPE_OTHER,
};
struct bsc_filter_state {
char *imsi;
int imsi_checked;
int con_type;
};
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);
/**
* Content filtering.
*/
int bsc_msg_filter_initial(struct gsm48_hdr *hdr, size_t size,
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_filter_request *req,
struct bsc_filter_state *state,
struct bsc_filter_reject_cause *cause);
/* IMSI allow/deny handling */
struct bsc_msg_acc_lst *bsc_msg_acc_lst_find(struct llist_head *lst, const char *name);
struct bsc_msg_acc_lst *bsc_msg_acc_lst_get(void *ctx, struct llist_head *lst, const char *name);
void bsc_msg_acc_lst_delete(struct bsc_msg_acc_lst *lst);
struct bsc_msg_acc_lst_entry *bsc_msg_acc_lst_entry_create(struct bsc_msg_acc_lst *);
int bsc_msg_acc_lst_check_allow(struct bsc_msg_acc_lst *lst, const char *imsi);
void bsc_msg_lst_vty_init(void *ctx, struct llist_head *lst, int node);
void bsc_msg_acc_lst_write(struct vty *vty, struct bsc_msg_acc_lst *lst);