ripngd: Make sure we do not overuse higher values for ECMP count

Use a minimum value of a CLI version and a value of Zebra capabilities.

Signed-off-by: Donatas Abraitis <[email protected]>

Author: ton31337

ripngd/ripng_main.c

@@ -32,6 +32,8 @@ struct option longopts[] = {{0}};
 /* ripngd privileges */
 zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND, ZCAP_SYS_ADMIN};
 
+uint32_t zebra_ecmp_count = MULTIPATH_NUM;
+
 struct zebra_privs_t ripngd_privs = {
 #if defined(FRR_USER)
 	.user = FRR_USER,

ripngd/ripng_nb_config.c

@@ -129,7 +129,8 @@ int ripngd_instance_allow_ecmp_modify(struct nb_cb_modify_args *args)
 		return NB_OK;
 
 	ripng = nb_running_get_entry(args->dnode, NULL, true);
-	ripng->ecmp = yang_dnode_get_uint8(args->dnode, NULL);
+	ripng->ecmp =
+		MIN(yang_dnode_get_uint8(args->dnode, NULL), zebra_ecmp_count);
 	if (!ripng->ecmp) {
 		ripng_ecmp_disable(ripng);
 		return NB_OK;

ripngd/ripng_zebra.c

@@ -20,7 +20,6 @@
 
 /* All information about zebra. */
 struct zclient *zclient = NULL;
-uint32_t zebra_ecmp_count = MULTIPATH_NUM;
 
 /* Send ECMP routes to zebra. */
 static void ripng_zebra_ipv6_send(struct ripng *ripng, struct agg_node *rp,

ripngd/ripngd.h

@@ -435,4 +435,6 @@ extern void ripng_vrf_init(void);
 extern void ripng_vrf_terminate(void);
 extern void ripng_cli_init(void);
 
+extern uint32_t zebra_ecmp_count;
+
 #endif /* _ZEBRA_RIPNG_RIPNGD_H */