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/*
* (C) 2010-2015 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2010-2011 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 <osmocom/bsc/bsc_msg_filter.h>
#include <osmocom/bsc/debug.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include <osmocom/core/rate_ctr.h>
#include <osmocom/core/stats.h>
#include <string.h>
static const struct rate_ctr_desc acc_list_ctr_description[] = {
[ACC_LIST_LOCAL_FILTER] = { "access-list:local-filter", "Rejected by rule for local"},
[ACC_LIST_GLOBAL_FILTER]= { "access-list:global-filter", "Rejected by rule for global"},
};
static const struct rate_ctr_group_desc bsc_cfg_acc_list_desc = {
.group_name_prefix = "nat:filter",
.group_description = "NAT Access-List Statistics",
.num_ctr = ARRAY_SIZE(acc_list_ctr_description),
.ctr_desc = acc_list_ctr_description,
.class_id = OSMO_STATS_CLASS_GLOBAL,
};
/*! Find an unused index for this rate counter group.
* \param[in] head List of allocated ctr groups of the same type
* \returns the largest used index number + 1, or 0 if none exist yet. */
static unsigned int rate_ctr_get_unused_idx(struct llist_head *head)
{
unsigned int idx = 0;
struct bsc_msg_acc_lst *lst;
llist_for_each_entry(lst, head, list) {
if (idx <= lst->stats->idx)
idx = lst->stats->idx + 1;
}
return idx;
}
int bsc_msg_acc_lst_check_allow(struct bsc_msg_acc_lst *lst, const char *mi_string)
{
struct bsc_msg_acc_lst_entry *entry;
llist_for_each_entry(entry, &lst->fltr_list, list) {
if (!entry->imsi_allow)
continue;
if (regexec(&entry->imsi_allow_re, mi_string, 0, NULL, 0) == 0)
return 0;
}
return 1;
}
struct bsc_msg_acc_lst *bsc_msg_acc_lst_find(struct llist_head *head, const char *name)
{
struct bsc_msg_acc_lst *lst;
if (!name)
return NULL;
llist_for_each_entry(lst, head, list)
if (strcmp(lst->name, name) == 0)
return lst;
return NULL;
}
struct bsc_msg_acc_lst *bsc_msg_acc_lst_get(void *ctx, struct llist_head *head, const char *name)
{
struct bsc_msg_acc_lst *lst;
unsigned int new_idx;
lst = bsc_msg_acc_lst_find(head, name);
if (lst)
return lst;
lst = talloc_zero(ctx, struct bsc_msg_acc_lst);
if (!lst) {
LOGP(DNAT, LOGL_ERROR, "Failed to allocate access list");
return NULL;
}
new_idx = rate_ctr_get_unused_idx(head);
lst->stats = rate_ctr_group_alloc(lst, &bsc_cfg_acc_list_desc, new_idx);
if (!lst->stats) {
talloc_free(lst);
return NULL;
}
INIT_LLIST_HEAD(&lst->fltr_list);
lst->name = talloc_strdup(lst, name);
llist_add_tail(&lst->list, head);
return lst;
}
void bsc_msg_acc_lst_delete(struct bsc_msg_acc_lst *lst)
{
llist_del(&lst->list);
rate_ctr_group_free(lst->stats);
talloc_free(lst);
}
struct bsc_msg_acc_lst_entry *bsc_msg_acc_lst_entry_create(struct bsc_msg_acc_lst *lst)
{
struct bsc_msg_acc_lst_entry *entry;
entry = talloc_zero(lst, struct bsc_msg_acc_lst_entry);
if (!entry)
return NULL;
entry->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
entry->lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED;
llist_add_tail(&entry->list, &lst->fltr_list);
return entry;
}
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