+int
+vnet_lisp_nsh_set_locator_set (u8 * locator_set_name, u8 is_add)
+{
+ lisp_cp_main_t *lcm = vnet_lisp_cp_get_main ();
+ lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
+ u32 locator_set_index = ~0;
+ mapping_t *m;
+ uword *p;
+
+ if (vnet_lisp_enable_disable_status () == 0)
+ {
+ clib_warning ("LISP is disabled!");
+ return VNET_API_ERROR_LISP_DISABLED;
+ }
+
+ if (is_add)
+ {
+ if (lcm->nsh_map_index == (u32) ~ 0)
+ {
+ p = hash_get_mem (lcm->locator_set_index_by_name, locator_set_name);
+ if (!p)
+ {
+ clib_warning ("locator-set %v doesn't exist", locator_set_name);
+ return -1;
+ }
+ locator_set_index = p[0];
+
+ pool_get (lcm->mapping_pool, m);
+ memset (m, 0, sizeof *m);
+ m->locator_set_index = locator_set_index;
+ m->local = 1;
+ m->nsh_set = 1;
+ lcm->nsh_map_index = m - lcm->mapping_pool;
+
+ if (~0 == vnet_lisp_gpe_add_nsh_iface (lgm))
+ return -1;
+ }
+ }
+ else
+ {
+ if (lcm->nsh_map_index != (u32) ~ 0)
+ {
+ /* remove NSH mapping */
+ pool_put_index (lcm->mapping_pool, lcm->nsh_map_index);
+ lcm->nsh_map_index = ~0;
+ vnet_lisp_gpe_del_nsh_iface (lgm);
+ }
+ }
+ return 0;
+}
+