tools/include: Add rtnetlink.h, id_addr.h and neighbour.h

tools/lib/bpf/netlink.c depends on rtnetlink.h and netlink.h (via
nlattr.h). Older versions of rtnetlink.h and netlink.h can cause
duplicate conflicting definitions to occur, as things like header guards
don't agree. To avoid these mismatches add rtnetlink.h, if_addr.h and
neighbour.h to tools/include with the standard difference check.

Signed-off-by: Ian Rogers <irogers@google.com>

tools/include/uapi/linux/if_addr.h

@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef __LINUX_IF_ADDR_H
+#define __LINUX_IF_ADDR_H
+
+#include <linux/types.h>
+#include <linux/netlink.h>
+
+struct ifaddrmsg {
+	__u8		ifa_family;
+	__u8		ifa_prefixlen;	/* The prefix length		*/
+	__u8		ifa_flags;	/* Flags			*/
+	__u8		ifa_scope;	/* Address scope		*/
+	__u32		ifa_index;	/* Link index			*/
+};
+
+/*
+ * Important comment:
+ * IFA_ADDRESS is prefix address, rather than local interface address.
+ * It makes no difference for normally configured broadcast interfaces,
+ * but for point-to-point IFA_ADDRESS is DESTINATION address,
+ * local address is supplied in IFA_LOCAL attribute.
+ *
+ * IFA_FLAGS is a u32 attribute that extends the u8 field ifa_flags.
+ * If present, the value from struct ifaddrmsg will be ignored.
+ */
+enum {
+	IFA_UNSPEC,
+	IFA_ADDRESS,
+	IFA_LOCAL,
+	IFA_LABEL,
+	IFA_BROADCAST,
+	IFA_ANYCAST,
+	IFA_CACHEINFO,
+	IFA_MULTICAST,
+	IFA_FLAGS,
+	IFA_RT_PRIORITY,  /* u32, priority/metric for prefix route */
+	IFA_TARGET_NETNSID,
+	__IFA_MAX,
+};
+
+#define IFA_MAX (__IFA_MAX - 1)
+
+/* ifa_flags */
+#define IFA_F_SECONDARY		0x01
+#define IFA_F_TEMPORARY		IFA_F_SECONDARY
+
+#define	IFA_F_NODAD		0x02
+#define IFA_F_OPTIMISTIC	0x04
+#define IFA_F_DADFAILED		0x08
+#define	IFA_F_HOMEADDRESS	0x10
+#define IFA_F_DEPRECATED	0x20
+#define IFA_F_TENTATIVE		0x40
+#define IFA_F_PERMANENT		0x80
+#define IFA_F_MANAGETEMPADDR	0x100
+#define IFA_F_NOPREFIXROUTE	0x200
+#define IFA_F_MCAUTOJOIN	0x400
+#define IFA_F_STABLE_PRIVACY	0x800
+
+struct ifa_cacheinfo {
+	__u32	ifa_prefered;
+	__u32	ifa_valid;
+	__u32	cstamp; /* created timestamp, hundredths of seconds */
+	__u32	tstamp; /* updated timestamp, hundredths of seconds */
+};
+
+/* backwards compatibility for userspace */
+#ifndef __KERNEL__
+#define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
+#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
+#endif
+
+#endif

tools/include/uapi/linux/neighbour.h

@@ -0,0 +1,199 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef __LINUX_NEIGHBOUR_H
+#define __LINUX_NEIGHBOUR_H
+
+#include <linux/types.h>
+#include <linux/netlink.h>
+
+struct ndmsg {
+	__u8		ndm_family;
+	__u8		ndm_pad1;
+	__u16		ndm_pad2;
+	__s32		ndm_ifindex;
+	__u16		ndm_state;
+	__u8		ndm_flags;
+	__u8		ndm_type;
+};
+
+enum {
+	NDA_UNSPEC,
+	NDA_DST,
+	NDA_LLADDR,
+	NDA_CACHEINFO,
+	NDA_PROBES,
+	NDA_VLAN,
+	NDA_PORT,
+	NDA_VNI,
+	NDA_IFINDEX,
+	NDA_MASTER,
+	NDA_LINK_NETNSID,
+	NDA_SRC_VNI,
+	NDA_PROTOCOL,  /* Originator of entry */
+	NDA_NH_ID,
+	NDA_FDB_EXT_ATTRS,
+	__NDA_MAX
+};
+
+#define NDA_MAX (__NDA_MAX - 1)
+
+/*
+ *	Neighbor Cache Entry Flags
+ */
+
+#define NTF_USE		0x01
+#define NTF_SELF	0x02
+#define NTF_MASTER	0x04
+#define NTF_PROXY	0x08	/* == ATF_PUBL */
+#define NTF_EXT_LEARNED	0x10
+#define NTF_OFFLOADED   0x20
+#define NTF_STICKY	0x40
+#define NTF_ROUTER	0x80
+
+/*
+ *	Neighbor Cache Entry States.
+ */
+
+#define NUD_INCOMPLETE	0x01
+#define NUD_REACHABLE	0x02
+#define NUD_STALE	0x04
+#define NUD_DELAY	0x08
+#define NUD_PROBE	0x10
+#define NUD_FAILED	0x20
+
+/* Dummy states */
+#define NUD_NOARP	0x40
+#define NUD_PERMANENT	0x80
+#define NUD_NONE	0x00
+
+/* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change
+   and make no address resolution or NUD.
+   NUD_PERMANENT also cannot be deleted by garbage collectors.
+ */
+
+struct nda_cacheinfo {
+	__u32		ndm_confirmed;
+	__u32		ndm_used;
+	__u32		ndm_updated;
+	__u32		ndm_refcnt;
+};
+
+/*****************************************************************
+ *		Neighbour tables specific messages.
+ *
+ * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
+ * NLM_F_DUMP flag set. Every neighbour table configuration is
+ * spread over multiple messages to avoid running into message
+ * size limits on systems with many interfaces. The first message
+ * in the sequence transports all not device specific data such as
+ * statistics, configuration, and the default parameter set.
+ * This message is followed by 0..n messages carrying device
+ * specific parameter sets.
+ * Although the ordering should be sufficient, NDTA_NAME can be
+ * used to identify sequences. The initial message can be identified
+ * by checking for NDTA_CONFIG. The device specific messages do
+ * not contain this TLV but have NDTPA_IFINDEX set to the
+ * corresponding interface index.
+ *
+ * To change neighbour table attributes, send RTM_SETNEIGHTBL
+ * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
+ * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
+ * otherwise. Device specific parameter sets can be changed by
+ * setting NDTPA_IFINDEX to the interface index of the corresponding
+ * device.
+ ****/
+
+struct ndt_stats {
+	__u64		ndts_allocs;
+	__u64		ndts_destroys;
+	__u64		ndts_hash_grows;
+	__u64		ndts_res_failed;
+	__u64		ndts_lookups;
+	__u64		ndts_hits;
+	__u64		ndts_rcv_probes_mcast;
+	__u64		ndts_rcv_probes_ucast;
+	__u64		ndts_periodic_gc_runs;
+	__u64		ndts_forced_gc_runs;
+	__u64		ndts_table_fulls;
+};
+
+enum {
+	NDTPA_UNSPEC,
+	NDTPA_IFINDEX,			/* u32, unchangeable */
+	NDTPA_REFCNT,			/* u32, read-only */
+	NDTPA_REACHABLE_TIME,		/* u64, read-only, msecs */
+	NDTPA_BASE_REACHABLE_TIME,	/* u64, msecs */
+	NDTPA_RETRANS_TIME,		/* u64, msecs */
+	NDTPA_GC_STALETIME,		/* u64, msecs */
+	NDTPA_DELAY_PROBE_TIME,		/* u64, msecs */
+	NDTPA_QUEUE_LEN,		/* u32 */
+	NDTPA_APP_PROBES,		/* u32 */
+	NDTPA_UCAST_PROBES,		/* u32 */
+	NDTPA_MCAST_PROBES,		/* u32 */
+	NDTPA_ANYCAST_DELAY,		/* u64, msecs */
+	NDTPA_PROXY_DELAY,		/* u64, msecs */
+	NDTPA_PROXY_QLEN,		/* u32 */
+	NDTPA_LOCKTIME,			/* u64, msecs */
+	NDTPA_QUEUE_LENBYTES,		/* u32 */
+	NDTPA_MCAST_REPROBES,		/* u32 */
+	NDTPA_PAD,
+	__NDTPA_MAX
+};
+#define NDTPA_MAX (__NDTPA_MAX - 1)
+
+struct ndtmsg {
+	__u8		ndtm_family;
+	__u8		ndtm_pad1;
+	__u16		ndtm_pad2;
+};
+
+struct ndt_config {
+	__u16		ndtc_key_len;
+	__u16		ndtc_entry_size;
+	__u32		ndtc_entries;
+	__u32		ndtc_last_flush;	/* delta to now in msecs */
+	__u32		ndtc_last_rand;		/* delta to now in msecs */
+	__u32		ndtc_hash_rnd;
+	__u32		ndtc_hash_mask;
+	__u32		ndtc_hash_chain_gc;
+	__u32		ndtc_proxy_qlen;
+};
+
+enum {
+	NDTA_UNSPEC,
+	NDTA_NAME,			/* char *, unchangeable */
+	NDTA_THRESH1,			/* u32 */
+	NDTA_THRESH2,			/* u32 */
+	NDTA_THRESH3,			/* u32 */
+	NDTA_CONFIG,			/* struct ndt_config, read-only */
+	NDTA_PARMS,			/* nested TLV NDTPA_* */
+	NDTA_STATS,			/* struct ndt_stats, read-only */
+	NDTA_GC_INTERVAL,		/* u64, msecs */
+	NDTA_PAD,
+	__NDTA_MAX
+};
+#define NDTA_MAX (__NDTA_MAX - 1)
+
+ /* FDB activity notification bits used in NFEA_ACTIVITY_NOTIFY:
+  * - FDB_NOTIFY_BIT - notify on activity/expire for any entry
+  * - FDB_NOTIFY_INACTIVE_BIT - mark as inactive to avoid multiple notifications
+  */
+enum {
+	FDB_NOTIFY_BIT		= (1 << 0),
+	FDB_NOTIFY_INACTIVE_BIT	= (1 << 1)
+};
+
+/* embedded into NDA_FDB_EXT_ATTRS:
+ * [NDA_FDB_EXT_ATTRS] = {
+ *     [NFEA_ACTIVITY_NOTIFY]
+ *     ...
+ * }
+ */
+enum {
+	NFEA_UNSPEC,
+	NFEA_ACTIVITY_NOTIFY,
+	NFEA_DONT_REFRESH,
+	__NFEA_MAX
+};
+#define NFEA_MAX (__NFEA_MAX - 1)
+
+#endif