route: add nh type

Makefile.am

@@ -110,6 +110,7 @@ libnlinclude_netlink_route_HEADERS = \
 	include/netlink/route/neightbl.h \
 	include/netlink/route/netconf.h \
 	include/netlink/route/nexthop.h \
+	include/netlink/route/nh.h \
 	include/netlink/route/pktloc.h \
 	include/netlink/route/qdisc.h \
 	include/netlink/route/route.h \
@@ -437,6 +438,7 @@ lib_libnl_route_3_la_SOURCES = \
 	lib/route/neightbl.c \
 	lib/route/netconf.c \
 	lib/route/nexthop.c \
+	lib/route/nh.c \
 	lib/route/nexthop_encap.c \
 	lib/route/nh_encap_mpls.c \
 	lib/route/pktloc.c \

include/netlink-private/nl-auto.h

@@ -69,6 +69,11 @@ void rtnl_route_nh_free(struct rtnl_nexthop *);
 #define _nl_auto_rtnl_nexthop _nl_auto(_nl_auto_rtnl_nexthop_fcn)
 _NL_AUTO_DEFINE_FCN_TYPED0(struct rtnl_nexthop *, _nl_auto_rtnl_nexthop_fcn, rtnl_route_nh_free);
 
+struct rtnl_nh;
+void rtnl_nh_put(struct rtnl_nh *);
+#define _nl_auto_rtnl_nh _nl_auto(_nl_auto_rtnl_nh_fcn)
+_NL_AUTO_DEFINE_FCN_TYPED0(struct rtnl_nh *, _nl_auto_rtnl_nh_fcn, rtnl_nh_put);
+
 struct nl_cache;
 void nl_cache_put(struct nl_cache *);
 #define _nl_auto_nl_cache _nl_auto(_nl_auto_nl_cache_fcn)

include/netlink-private/types.h

@@ -17,6 +17,7 @@
 #include <netlink-private/object-api.h>
 #include <netlink-private/route/tc-api.h>
 #include <netlink-private/route/link/sriov.h>
+#include <netlink/route/nh.h>
 #include <netlink-private/route/nexthop-encap.h>
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
@@ -324,6 +325,28 @@ struct rtnl_nexthop
 	struct rtnl_nh_encap *	rtnh_encap;
 };
 
+struct rtnl_nexthop_group
+{
+	struct nl_list_head	nexthop_list;
+	int			ce_refcnt;
+	uint32_t id;
+	uint8_t weight;
+};
+
+struct rtnl_nh
+{
+	NLHDR_COMMON
+
+	uint8_t nh_family;
+	uint32_t nh_flags;
+
+	uint32_t nh_id;
+	uint32_t nh_group_type;
+	nl_nh_group_t * nh_group;
+	uint32_t nh_oif;
+	struct nl_addr * nh_gateway;
+};
+
 struct rtnl_route
 {
 	NLHDR_COMMON

include/netlink/route/nh.h

@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: LGPL-2.1-only */
+/*
+ * Copyright (c) 2022 Stanislav Zaikin <[email protected]>
+ */
+
+#ifndef NETLINK_ROUTE_NEXTHOP2_H_
+#define NETLINK_ROUTE_NEXTHOP2_H_
+
+#include <netlink/netlink.h>
+#include <netlink/addr.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct rtnl_nh;
+
+typedef struct nl_nh_group_info {
+	uint32_t nh_id; /*!< VLAN number */
+	uint8_t weight; /*!< VLAN QOS value */
+} nl_nh_group_info_t;
+
+typedef struct nl_nh_group {
+	int ce_refcnt;
+	unsigned size;
+	nl_nh_group_info_t *entries;
+} nl_nh_group_t;
+
+extern int rtnl_nh_alloc_cache(struct nl_sock *sk, int family,
+			       struct nl_cache **result);
+extern struct rtnl_nh *rtnl_nh_alloc(void);
+extern struct rtnl_nh *rtnl_nh_clone(struct rtnl_nh *);
+extern void rtnl_nh_put(struct rtnl_nh *);
+
+extern struct rtnl_nh *rtnl_nh_get(struct nl_cache *cache, int nhid);
+
+extern int rtnl_nh_compare(struct rtnl_nh *, struct rtnl_nh *, uint32_t, int);
+
+extern void rtnl_nh_dump(struct rtnl_nh *, struct nl_dump_params *);
+
+extern int rtnl_nh_set_gateway(struct rtnl_nh *, struct nl_addr *);
+extern struct nl_addr *rtnl_nh_get_gateway(struct rtnl_nh *);
+
+extern int rtnl_nh_set_fdb(struct rtnl_nh *, int value);
+extern int rtnl_nh_get_fdb(struct rtnl_nh *);
+
+extern int rtnl_nh_get_group_entry(struct rtnl_nh *, int n);
+extern int rtnl_nh_get_group_size(struct rtnl_nh *);
+
+extern int rtnl_nh_get_id(struct rtnl_nh *);
+extern int rtnl_nh_get_oif(struct rtnl_nh *);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif