nat: Introduce the concept of a paging group and use it
A paging group is a list of LACs, different BSCs can point
to a paging group and use it for the LAC lookup.
diff --git a/openbsc/include/openbsc/bsc_nat.h b/openbsc/include/openbsc/bsc_nat.h
index e6f555c..85c9eaa 100644
--- a/openbsc/include/openbsc/bsc_nat.h
+++ b/openbsc/include/openbsc/bsc_nat.h
@@ -38,6 +38,8 @@
#define DIR_BSC 1
#define DIR_MSC 2
+#define PAGIN_GROUP_UNASSIGNED -1
+
struct sccp_source_reference;
struct sccp_connections;
struct bsc_nat_parsed;
@@ -134,6 +136,7 @@
char *acc_lst_name;
int forbid_paging;
+ int paging_group;
/* audio handling */
int max_endpoints;
@@ -151,6 +154,14 @@
uint16_t lac;
};
+struct bsc_nat_paging_group {
+ struct llist_head entry;
+
+ /* list of lac entries */
+ struct llist_head lists;
+ int nr;
+};
+
/**
* BSCs point of view of endpoints
*/
@@ -225,6 +236,9 @@
/* access lists */
struct llist_head access_lists;
+ /* paging groups */
+ struct llist_head paging_groups;
+
/* known BSC's */
struct llist_head bsc_configs;
int num_bsc;
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c b/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
index 0a565a9..512656a 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
@@ -90,6 +90,7 @@
INIT_LLIST_HEAD(&nat->sccp_connections);
INIT_LLIST_HEAD(&nat->bsc_connections);
+ INIT_LLIST_HEAD(&nat->paging_groups);
INIT_LLIST_HEAD(&nat->bsc_configs);
INIT_LLIST_HEAD(&nat->access_lists);
INIT_LLIST_HEAD(&nat->dests);
@@ -137,6 +138,7 @@
conf->nr = nat->num_bsc;
conf->nat = nat;
conf->max_endpoints = 32;
+ conf->paging_group = PAGIN_GROUP_UNASSIGNED;
INIT_LLIST_HEAD(&conf->lac_list);
@@ -187,14 +189,36 @@
}
}
+static struct bsc_nat_paging_group *bsc_nat_paging_group_num(
+ struct bsc_nat *nat, int group)
+{
+ struct bsc_nat_paging_group *pgroup;
+
+ llist_for_each_entry(pgroup, &nat->paging_groups, entry)
+ if (pgroup->nr == group)
+ return pgroup;
+
+ return NULL;
+}
+
int bsc_config_handles_lac(struct bsc_config *cfg, int lac_nr)
{
+ struct bsc_nat_paging_group *pgroup;
struct bsc_lac_entry *entry;
llist_for_each_entry(entry, &cfg->lac_list, entry)
if (entry->lac == lac_nr)
return 1;
+ /* now lookup the paging group */
+ pgroup = bsc_nat_paging_group_num(cfg->nat, cfg->paging_group);
+ if (!pgroup)
+ return 0;
+
+ llist_for_each_entry(entry, &pgroup->lists, entry)
+ if (entry->lac == lac_nr)
+ return 1;
+
return 0;
}