nat: Verify that the configured LACs are unique across the nat
diff --git a/openbsc/src/nat/bsc_nat_vty.c b/openbsc/src/nat/bsc_nat_vty.c
index 6959037..6dae0d6 100644
--- a/openbsc/src/nat/bsc_nat_vty.c
+++ b/openbsc/src/nat/bsc_nat_vty.c
@@ -154,6 +154,7 @@
DEFUN(cfg_bsc_lac, cfg_bsc_lac_cmd, "location_area_code <0-65535>",
"Set the Location Area Code (LAC) of this BSC\n")
{
+ struct bsc_config *tmp;
struct bsc_config *conf = vty->index;
int lac = atoi(argv[0]);
@@ -170,6 +171,14 @@
return CMD_WARNING;
}
+ /* verify that the LACs are unique */
+ llist_for_each_entry(tmp, &_nat->bsc_configs, entry) {
+ if (tmp->lac == lac) {
+ vty_out(vty, "%% LAC %d is already used.%s", lac, VTY_NEWLINE);
+ return CMD_ERR_INCOMPLETE;
+ }
+ }
+
conf->lac = lac;
return CMD_SUCCESS;