[mirror_iproute2.git] / include / libnetlink.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LIBNETLINK_H__
#define __LIBNETLINK_H__ 1

#include <stdio.h>
#include <string.h>
#include <asm/types.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/if_link.h>
#include <linux/if_addr.h>
#include <linux/neighbour.h>
#include <linux/netconf.h>
#include <arpa/inet.h>

struct rtnl_handle {
	int			fd;
	struct sockaddr_nl	local;
	struct sockaddr_nl	peer;
	__u32			seq;
	__u32			dump;
	int			proto;
	FILE		       *dump_fp;
#define RTNL_HANDLE_F_LISTEN_ALL_NSID		0x01
#define RTNL_HANDLE_F_SUPPRESS_NLERR		0x02
#define RTNL_HANDLE_F_STRICT_CHK		0x04
	int			flags;
};

struct nlmsg_list {
	struct nlmsg_list *next;
	struct nlmsghdr   h;
};

struct nlmsg_chain {
	struct nlmsg_list *head;
	struct nlmsg_list *tail;
};

extern int rcvbuf;

int rtnl_open(struct rtnl_handle *rth, unsigned int subscriptions)
	__attribute__((warn_unused_result));

int rtnl_open_byproto(struct rtnl_handle *rth, unsigned int subscriptions,
			     int protocol)
	__attribute__((warn_unused_result));
int rtnl_add_nl_group(struct rtnl_handle *rth, unsigned int group)
	__attribute__((warn_unused_result));
void rtnl_close(struct rtnl_handle *rth);
void rtnl_set_strict_dump(struct rtnl_handle *rth);

typedef int (*req_filter_fn_t)(struct nlmsghdr *nlh, int reqlen);

int rtnl_addrdump_req(struct rtnl_handle *rth, int family,
		      req_filter_fn_t filter_fn)
	__attribute__((warn_unused_result));
int rtnl_addrlbldump_req(struct rtnl_handle *rth, int family)
	__attribute__((warn_unused_result));
int rtnl_routedump_req(struct rtnl_handle *rth, int family,
		       req_filter_fn_t filter_fn)
	__attribute__((warn_unused_result));
int rtnl_ruledump_req(struct rtnl_handle *rth, int family)
	__attribute__((warn_unused_result));
int rtnl_neighdump_req(struct rtnl_handle *rth, int family,
		       req_filter_fn_t filter_fn)
	__attribute__((warn_unused_result));
int rtnl_neightbldump_req(struct rtnl_handle *rth, int family)
	__attribute__((warn_unused_result));
int rtnl_mdbdump_req(struct rtnl_handle *rth, int family)
	__attribute__((warn_unused_result));
int rtnl_netconfdump_req(struct rtnl_handle *rth, int family)
	__attribute__((warn_unused_result));

int rtnl_linkdump_req(struct rtnl_handle *rth, int fam)
	__attribute__((warn_unused_result));
int rtnl_linkdump_req_filter(struct rtnl_handle *rth, int fam, __u32 filt_mask)
	__attribute__((warn_unused_result));

int rtnl_linkdump_req_filter_fn(struct rtnl_handle *rth, int fam,
				req_filter_fn_t fn)
	__attribute__((warn_unused_result));
int rtnl_fdb_linkdump_req_filter_fn(struct rtnl_handle *rth,
				    req_filter_fn_t filter_fn)
	__attribute__((warn_unused_result));
int rtnl_nsiddump_req_filter_fn(struct rtnl_handle *rth, int family,
				req_filter_fn_t filter_fn)
	__attribute__((warn_unused_result));
int rtnl_statsdump_req_filter(struct rtnl_handle *rth, int fam, __u32 filt_mask)
	__attribute__((warn_unused_result));
int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req,
			     int len)
	__attribute__((warn_unused_result));
int rtnl_dump_request_n(struct rtnl_handle *rth, struct nlmsghdr *n)
	__attribute__((warn_unused_result));

int rtnl_nexthopdump_req(struct rtnl_handle *rth, int family,
			 req_filter_fn_t filter_fn)
	__attribute__((warn_unused_result));

struct rtnl_ctrl_data {
	int	nsid;
};

typedef int (*rtnl_filter_t)(struct nlmsghdr *n, void *);

typedef int (*rtnl_listen_filter_t)(struct rtnl_ctrl_data *,
				    struct nlmsghdr *n, void *);

typedef int (*nl_ext_ack_fn_t)(const char *errmsg, uint32_t off,
			       const struct nlmsghdr *inner_nlh);

struct rtnl_dump_filter_arg {
	rtnl_filter_t filter;
	void *arg1;
	__u16 nc_flags;
};

int rtnl_dump_filter_nc(struct rtnl_handle *rth,
			rtnl_filter_t filter,
			void *arg, __u16 nc_flags);
#define rtnl_dump_filter(rth, filter, arg) \
	rtnl_dump_filter_nc(rth, filter, arg, 0)
int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
	      struct nlmsghdr **answer)
	__attribute__((warn_unused_result));
int rtnl_talk_iov(struct rtnl_handle *rtnl, struct iovec *iovec, size_t iovlen,
		  struct nlmsghdr **answer)
	__attribute__((warn_unused_result));
int rtnl_talk_suppress_rtnl_errmsg(struct rtnl_handle *rtnl, struct nlmsghdr *n,
				   struct nlmsghdr **answer)
	__attribute__((warn_unused_result));
int rtnl_send(struct rtnl_handle *rth, const void *buf, int)
	__attribute__((warn_unused_result));
int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int)
	__attribute__((warn_unused_result));
int nl_dump_ext_ack(const struct nlmsghdr *nlh, nl_ext_ack_fn_t errfn);
int nl_dump_ext_ack_done(const struct nlmsghdr *nlh, int error);

int addattr(struct nlmsghdr *n, int maxlen, int type);
int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data);
int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data);
int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data);
int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *data);

int addattr_l(struct nlmsghdr *n, int maxlen, int type,
	      const void *data, int alen);
int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type,
				   const void *data, int len);
int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest);
int rta_addattr8(struct rtattr *rta, int maxlen, int type, __u8 data);
int rta_addattr16(struct rtattr *rta, int maxlen, int type, __u16 data);
int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
int rta_addattr64(struct rtattr *rta, int maxlen, int type, __u64 data);
int rta_addattr_l(struct rtattr *rta, int maxlen, int type,
		  const void *data, int alen);

int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
int parse_rtattr_flags(struct rtattr *tb[], int max, struct rtattr *rta,
			      int len, unsigned short flags);
struct rtattr *parse_rtattr_one(int type, struct rtattr *rta, int len);
int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rtattr *rta, int len);

struct rtattr *rta_nest(struct rtattr *rta, int maxlen, int type);
int rta_nest_end(struct rtattr *rta, struct rtattr *nest);

#define RTA_TAIL(rta) \
		((struct rtattr *) (((void *) (rta)) + \
				    RTA_ALIGN((rta)->rta_len)))

#define parse_rtattr_nested(tb, max, rta) \
	(parse_rtattr_flags((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta), \
			    NLA_F_NESTED))

#define parse_rtattr_one_nested(type, rta) \
	(parse_rtattr_one(type, RTA_DATA(rta), RTA_PAYLOAD(rta)))

#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
	({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL;	\
		__parse_rtattr_nested_compat(tb, max, rta, len); })

static inline __u8 rta_getattr_u8(const struct rtattr *rta)
{
	return *(__u8 *)RTA_DATA(rta);
}
static inline __u16 rta_getattr_u16(const struct rtattr *rta)
{
	return *(__u16 *)RTA_DATA(rta);
}
static inline __be16 rta_getattr_be16(const struct rtattr *rta)
{
	return ntohs(rta_getattr_u16(rta));
}
static inline __u32 rta_getattr_u32(const struct rtattr *rta)
{
	return *(__u32 *)RTA_DATA(rta);
}
static inline __be32 rta_getattr_be32(const struct rtattr *rta)
{
	return ntohl(rta_getattr_u32(rta));
}
static inline __u64 rta_getattr_u64(const struct rtattr *rta)
{
	__u64 tmp;

	memcpy(&tmp, RTA_DATA(rta), sizeof(__u64));
	return tmp;
}
static inline __s32 rta_getattr_s32(const struct rtattr *rta)
{
	return *(__s32 *)RTA_DATA(rta);
}
static inline __s64 rta_getattr_s64(const struct rtattr *rta)
{
	__s64 tmp;

	memcpy(&tmp, RTA_DATA(rta), sizeof(tmp));
	return tmp;
}
static inline const char *rta_getattr_str(const struct rtattr *rta)
{
	return (const char *)RTA_DATA(rta);
}

int rtnl_listen_all_nsid(struct rtnl_handle *);
int rtnl_listen(struct rtnl_handle *, rtnl_listen_filter_t handler,
		void *jarg);
int rtnl_from_file(FILE *, rtnl_listen_filter_t handler,
		   void *jarg);

#define NLMSG_TAIL(nmsg) \
	((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))

#ifndef IFA_RTA
#define IFA_RTA(r) \
	((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
#endif
#ifndef IFA_PAYLOAD
#define IFA_PAYLOAD(n)	NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg))
#endif

#ifndef IFLA_RTA
#define IFLA_RTA(r) \
	((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
#endif
#ifndef IFLA_PAYLOAD
#define IFLA_PAYLOAD(n)	NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg))
#endif

#ifndef NDA_RTA
#define NDA_RTA(r) \
	((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
#endif
#ifndef NDA_PAYLOAD
#define NDA_PAYLOAD(n)	NLMSG_PAYLOAD(n, sizeof(struct ndmsg))
#endif

#ifndef NDTA_RTA
#define NDTA_RTA(r) \
	((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
#endif
#ifndef NDTA_PAYLOAD
#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndtmsg))
#endif

#ifndef NETNS_RTA
#define NETNS_RTA(r) \
	((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct rtgenmsg))))
#endif
#ifndef NETNS_PAYLOAD
#define NETNS_PAYLOAD(n)	NLMSG_PAYLOAD(n, sizeof(struct rtgenmsg))
#endif

#ifndef IFLA_STATS_RTA
#define IFLA_STATS_RTA(r) \
	((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct if_stats_msg))))
#endif

/* User defined nlmsg_type which is used mostly for logging netlink
 * messages from dump file */
#define NLMSG_TSTAMP	15

#define rtattr_for_each_nested(attr, nest) \
	for ((attr) = (void *)RTA_DATA(nest); \
	     RTA_OK(attr, RTA_PAYLOAD(nest) - ((char *)(attr) - (char *)RTA_DATA((nest)))); \
	     (attr) = RTA_TAIL((attr)))

#endif /* __LIBNETLINK_H__ */
Commit	Line	Data
6054c1eb	1	/* SPDX-License-Identifier: GPL-2.0 */
aba5acdf SH	2	#ifndef __LIBNETLINK_H__
	3	#define __LIBNETLINK_H__ 1
	4
5bd9dd49	5	#include <stdio.h>
f5b830dc	6	#include <string.h>
aba5acdf SH	7	#include <asm/types.h>
	8	#include <linux/netlink.h>
	9	#include <linux/rtnetlink.h>
ead2ba70 SH	10	#include <linux/if_link.h>
	11	#include <linux/if_addr.h>
	12	#include <linux/neighbour.h>
9d0efc10	13	#include <linux/netconf.h>
aab0f610	14	#include <arpa/inet.h>
aba5acdf	15
e9e9365b	16	struct rtnl_handle {
aba5acdf SH	17	int fd;
	18	struct sockaddr_nl local;
	19	struct sockaddr_nl peer;
	20	__u32 seq;
	21	__u32 dump;
8a4025f6	22	int proto;
486ccd99	23	FILE *dump_fp;
449b824a	24	#define RTNL_HANDLE_F_LISTEN_ALL_NSID 0x01
3ad6d176	25	#define RTNL_HANDLE_F_SUPPRESS_NLERR 0x02
285033bf	26	#define RTNL_HANDLE_F_STRICT_CHK 0x04
449b824a	27	int flags;
aba5acdf SH	28	};
aba5acdf SH	29
4ad87594 DA	30	struct nlmsg_list {
	31	struct nlmsg_list *next;
	32	struct nlmsghdr h;
	33	};
	34
	35	struct nlmsg_chain {
	36	struct nlmsg_list *head;
	37	struct nlmsg_list *tail;
	38	};
	39
7f03191f PM	40	extern int rcvbuf;
7f03191f PM	41
e9e9365b	42	int rtnl_open(struct rtnl_handle *rth, unsigned int subscriptions)
d2468da0 SH	43	__attribute__((warn_unused_result));
d2468da0 SH	44
e9e9365b	45	int rtnl_open_byproto(struct rtnl_handle *rth, unsigned int subscriptions,
d2468da0 SH	46	int protocol)
d2468da0 SH	47	__attribute__((warn_unused_result));
9860becf DA	48	int rtnl_add_nl_group(struct rtnl_handle *rth, unsigned int group)
9860becf DA	49	__attribute__((warn_unused_result));
892e2124	50	void rtnl_close(struct rtnl_handle *rth);
aea41afc	51	void rtnl_set_strict_dump(struct rtnl_handle *rth);
46917d08	52
43fd93ae DA	53	typedef int (req_filter_fn_t)(struct nlmsghdr nlh, int reqlen);
43fd93ae DA	54
88470978 DA	55	int rtnl_addrdump_req(struct rtnl_handle *rth, int family,
88470978 DA	56	req_filter_fn_t filter_fn)
46917d08	57	__attribute__((warn_unused_result));
39360023 DA	58	int rtnl_addrlbldump_req(struct rtnl_handle *rth, int family)
39360023 DA	59	__attribute__((warn_unused_result));
43fd93ae DA	60	int rtnl_routedump_req(struct rtnl_handle *rth, int family,
43fd93ae DA	61	req_filter_fn_t filter_fn)
bfb27dfa	62	__attribute__((warn_unused_result));
b05d9a3d DA	63	int rtnl_ruledump_req(struct rtnl_handle *rth, int family)
b05d9a3d DA	64	__attribute__((warn_unused_result));
f255ab12 DA	65	int rtnl_neighdump_req(struct rtnl_handle *rth, int family,
f255ab12 DA	66	req_filter_fn_t filter_fn)
9e0ab19c	67	__attribute__((warn_unused_result));
ff41db8a DA	68	int rtnl_neightbldump_req(struct rtnl_handle *rth, int family)
ff41db8a DA	69	__attribute__((warn_unused_result));
9dbe6df4 DA	70	int rtnl_mdbdump_req(struct rtnl_handle *rth, int family)
9dbe6df4 DA	71	__attribute__((warn_unused_result));
ddee16bc DA	72	int rtnl_netconfdump_req(struct rtnl_handle *rth, int family)
ddee16bc DA	73	__attribute__((warn_unused_result));
46917d08	74
31ae2912	75	int rtnl_linkdump_req(struct rtnl_handle *rth, int fam)
d2468da0	76	__attribute__((warn_unused_result));
31ae2912	77	int rtnl_linkdump_req_filter(struct rtnl_handle *rth, int fam, __u32 filt_mask)
d2468da0	78	__attribute__((warn_unused_result));
b0a4ce62	79
31ae2912	80	int rtnl_linkdump_req_filter_fn(struct rtnl_handle *rth, int fam,
b0a4ce62 DA	81	req_filter_fn_t fn)
b0a4ce62 DA	82	__attribute__((warn_unused_result));
264be1d8 IS	83	int rtnl_fdb_linkdump_req_filter_fn(struct rtnl_handle *rth,
	84	req_filter_fn_t filter_fn)
	85	__attribute__((warn_unused_result));
eaefb078 ND	86	int rtnl_nsiddump_req_filter_fn(struct rtnl_handle *rth, int family,
	87	req_filter_fn_t filter_fn)
	88	__attribute__((warn_unused_result));
56eeeda9	89	int rtnl_statsdump_req_filter(struct rtnl_handle *rth, int fam, __u32 filt_mask)
7abf5de6	90	__attribute__((warn_unused_result));
892e2124	91	int rtnl_dump_request(struct rtnl_handle rth, int type, void req,
d2468da0 SH	92	int len)
d2468da0 SH	93	__attribute__((warn_unused_result));
0d238ca2 DA	94	int rtnl_dump_request_n(struct rtnl_handle rth, struct nlmsghdr n)
0d238ca2 DA	95	__attribute__((warn_unused_result));
6dc9f016	96
74829ca7 DA	97	int rtnl_nexthopdump_req(struct rtnl_handle *rth, int family,
	98	req_filter_fn_t filter_fn)
	99	__attribute__((warn_unused_result));
	100
0628cddd	101	struct rtnl_ctrl_data {
449b824a	102	int nsid;
0628cddd ND	103	};
0628cddd ND	104
cd554f2c	105	typedef int (rtnl_filter_t)(struct nlmsghdr n, void *);
b49240ec	106
cd554f2c	107	typedef int (rtnl_listen_filter_t)(struct rtnl_ctrl_data ,
0628cddd ND	108	struct nlmsghdr n, void );
0628cddd ND	109
b6432e68 SH	110	typedef int (nl_ext_ack_fn_t)(const char errmsg, uint32_t off,
	111	const struct nlmsghdr *inner_nlh);
	112
e9e9365b	113	struct rtnl_dump_filter_arg {
b49240ec SH	114	rtnl_filter_t filter;
b49240ec SH	115	void *arg1;
8e72880f	116	__u16 nc_flags;
b49240ec SH	117	};
b49240ec SH	118
8e72880f PS	119	int rtnl_dump_filter_nc(struct rtnl_handle *rth,
	120	rtnl_filter_t filter,
	121	void *arg, __u16 nc_flags);
	122	#define rtnl_dump_filter(rth, filter, arg) \
	123	rtnl_dump_filter_nc(rth, filter, arg, 0)
892e2124	124	int rtnl_talk(struct rtnl_handle rtnl, struct nlmsghdr n,
86bf43c7	125	struct nlmsghdr **answer)
d2468da0	126	__attribute__((warn_unused_result));
72a2ff39 CM	127	int rtnl_talk_iov(struct rtnl_handle rtnl, struct iovec iovec, size_t iovlen,
	128	struct nlmsghdr **answer)
	129	__attribute__((warn_unused_result));
463d9efa	130	int rtnl_talk_suppress_rtnl_errmsg(struct rtnl_handle rtnl, struct nlmsghdr n,
86bf43c7	131	struct nlmsghdr **answer)
463d9efa	132	__attribute__((warn_unused_result));
892e2124	133	int rtnl_send(struct rtnl_handle rth, const void buf, int)
d2468da0	134	__attribute__((warn_unused_result));
892e2124	135	int rtnl_send_check(struct rtnl_handle rth, const void buf, int)
d2468da0	136	__attribute__((warn_unused_result));
049c5853	137	int nl_dump_ext_ack(const struct nlmsghdr *nlh, nl_ext_ack_fn_t errfn);
c934da8a	138	int nl_dump_ext_ack_done(const struct nlmsghdr *nlh, int error);
aba5acdf	139
892e2124 SH	140	int addattr(struct nlmsghdr *n, int maxlen, int type);
	141	int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data);
	142	int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data);
	143	int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
	144	int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data);
	145	int addattrstrz(struct nlmsghdr n, int maxlen, int type, const char data);
	146
	147	int addattr_l(struct nlmsghdr *n, int maxlen, int type,
	148	const void *data, int alen);
	149	int addraw_l(struct nlmsghdr n, int maxlen, const void data, int len);
	150	struct rtattr addattr_nest(struct nlmsghdr n, int maxlen, int type);
	151	int addattr_nest_end(struct nlmsghdr n, struct rtattr nest);
	152	struct rtattr addattr_nest_compat(struct nlmsghdr n, int maxlen, int type,
	153	const void *data, int len);
	154	int addattr_nest_compat_end(struct nlmsghdr n, struct rtattr nest);
303cc9cb RP	155	int rta_addattr8(struct rtattr *rta, int maxlen, int type, __u8 data);
303cc9cb RP	156	int rta_addattr16(struct rtattr *rta, int maxlen, int type, __u16 data);
892e2124	157	int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
303cc9cb	158	int rta_addattr64(struct rtattr *rta, int maxlen, int type, __u64 data);
892e2124 SH	159	int rta_addattr_l(struct rtattr *rta, int maxlen, int type,
	160	const void *data, int alen);
	161
	162	int parse_rtattr(struct rtattr tb[], int max, struct rtattr rta, int len);
	163	int parse_rtattr_flags(struct rtattr tb[], int max, struct rtattr rta,
b1b7ce0f	164	int len, unsigned short flags);
892e2124 SH	165	struct rtattr parse_rtattr_one(int type, struct rtattr rta, int len);
892e2124 SH	166	int __parse_rtattr_nested_compat(struct rtattr tb[], int max, struct rtattr rta, int len);
aba5acdf	167
303cc9cb RP	168	struct rtattr rta_nest(struct rtattr rta, int maxlen, int type);
	169	int rta_nest_end(struct rtattr rta, struct rtattr nest);
	170
	171	#define RTA_TAIL(rta) \
	172	((struct rtattr ) (((void ) (rta)) + \
	173	RTA_ALIGN((rta)->rta_len)))
	174
753fca4f	175	#define parse_rtattr_nested(tb, max, rta) \
0da4cfaa PM	176	(parse_rtattr_flags((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta), \
0da4cfaa PM	177	NLA_F_NESTED))
753fca4f	178
decbb437 JP	179	#define parse_rtattr_one_nested(type, rta) \
	180	(parse_rtattr_one(type, RTA_DATA(rta), RTA_PAYLOAD(rta)))
	181
2f90c9c0	182	#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
cd70f3f5 SH	183	({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
cd70f3f5 SH	184	__parse_rtattr_nested_compat(tb, max, rta, len); })
2f90c9c0	185
7dd03712 SH	186	static inline __u8 rta_getattr_u8(const struct rtattr *rta)
	187	{
	188	return (__u8 )RTA_DATA(rta);
	189	}
46c5d64d SH	190	static inline __u16 rta_getattr_u16(const struct rtattr *rta)
	191	{
	192	return (__u16 )RTA_DATA(rta);
	193	}
aab0f610 AV	194	static inline __be16 rta_getattr_be16(const struct rtattr *rta)
	195	{
	196	return ntohs(rta_getattr_u16(rta));
	197	}
7dd03712	198	static inline __u32 rta_getattr_u32(const struct rtattr *rta)
46c5d64d SH	199	{
	200	return (__u32 )RTA_DATA(rta);
	201	}
aab0f610 AV	202	static inline __be32 rta_getattr_be32(const struct rtattr *rta)
	203	{
	204	return ntohl(rta_getattr_u32(rta));
	205	}
46c5d64d SH	206	static inline __u64 rta_getattr_u64(const struct rtattr *rta)
	207	{
	208	__u64 tmp;
e9e9365b	209
46c5d64d SH	210	memcpy(&tmp, RTA_DATA(rta), sizeof(__u64));
	211	return tmp;
	212	}
d791f3ad JSP	213	static inline __s32 rta_getattr_s32(const struct rtattr *rta)
	214	{
	215	return (__s32 )RTA_DATA(rta);
	216	}
de63cd90 VCG	217	static inline __s64 rta_getattr_s64(const struct rtattr *rta)
	218	{
	219	__s64 tmp;
	220
	221	memcpy(&tmp, RTA_DATA(rta), sizeof(tmp));
	222	return tmp;
	223	}
46c5d64d SH	224	static inline const char rta_getattr_str(const struct rtattr rta)
46c5d64d SH	225	{
cfd2cbd1	226	return (const char *)RTA_DATA(rta);
46c5d64d SH	227	}
46c5d64d SH	228
892e2124 SH	229	int rtnl_listen_all_nsid(struct rtnl_handle *);
	230	int rtnl_listen(struct rtnl_handle *, rtnl_listen_filter_t handler,
	231	void *jarg);
	232	int rtnl_from_file(FILE *, rtnl_listen_filter_t handler,
	233	void *jarg);
aba5acdf	234
370d67ba	235	#define NLMSG_TAIL(nmsg) \
	236	((struct rtattr ) (((void ) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
	237
ead2ba70 SH	238	#ifndef IFA_RTA
ead2ba70 SH	239	#define IFA_RTA(r) \
e9e9365b	240	((struct rtattr )(((char )(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
ead2ba70 SH	241	#endif
ead2ba70 SH	242	#ifndef IFA_PAYLOAD
e9e9365b	243	#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg))
ead2ba70 SH	244	#endif
	245
	246	#ifndef IFLA_RTA
	247	#define IFLA_RTA(r) \
e9e9365b	248	((struct rtattr )(((char )(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
ead2ba70 SH	249	#endif
ead2ba70 SH	250	#ifndef IFLA_PAYLOAD
e9e9365b	251	#define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg))
ead2ba70 SH	252	#endif
	253
	254	#ifndef NDA_RTA
	255	#define NDA_RTA(r) \
e9e9365b	256	((struct rtattr )(((char )(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
ead2ba70 SH	257	#endif
ead2ba70 SH	258	#ifndef NDA_PAYLOAD
e9e9365b	259	#define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndmsg))
ead2ba70 SH	260	#endif
	261
	262	#ifndef NDTA_RTA
	263	#define NDTA_RTA(r) \
e9e9365b	264	((struct rtattr )(((char )(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
ead2ba70 SH	265	#endif
ead2ba70 SH	266	#ifndef NDTA_PAYLOAD
e9e9365b	267	#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ndtmsg))
ead2ba70 SH	268	#endif
ead2ba70 SH	269
d182ee13 ND	270	#ifndef NETNS_RTA
d182ee13 ND	271	#define NETNS_RTA(r) \
e9e9365b	272	((struct rtattr )(((char )(r)) + NLMSG_ALIGN(sizeof(struct rtgenmsg))))
d182ee13 ND	273	#endif
d182ee13 ND	274	#ifndef NETNS_PAYLOAD
e9e9365b	275	#define NETNS_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct rtgenmsg))
d182ee13 ND	276	#endif
d182ee13 ND	277
7abf5de6 NA	278	#ifndef IFLA_STATS_RTA
	279	#define IFLA_STATS_RTA(r) \
	280	((struct rtattr )(((char )(r)) + NLMSG_ALIGN(sizeof(struct if_stats_msg))))
	281	#endif
	282
27b14f2e VK	283	/* User defined nlmsg_type which is used mostly for logging netlink
	284	* messages from dump file */
	285	#define NLMSG_TSTAMP 15
	286
784fa9f6 JB	287	#define rtattr_for_each_nested(attr, nest) \
	288	for ((attr) = (void *)RTA_DATA(nest); \
	289	RTA_OK(attr, RTA_PAYLOAD(nest) - ((char )(attr) - (char )RTA_DATA((nest)))); \
	290	(attr) = RTA_TAIL((attr)))
	291
aba5acdf	292	#endif /* __LIBNETLINK_H__ */