[mirror_frr.git] / pimd / mtracebis_netlink.h

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * libnetlink.c	RTnetlink service routines.
 *
 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 */

#ifdef __linux__

#ifndef __LIBNETLINK_H__
#define __LIBNETLINK_H__ 1

#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>

struct rtnl_handle {
	int fd;
	struct sockaddr_nl local;
	struct sockaddr_nl peer;
	__u32 seq;
	__u32 dump;
};

extern int rcvbuf;

extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions);
extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions,
			     int protocol);
extern void rtnl_close(struct rtnl_handle *rth);
extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type);
extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req,
			     int len);

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

struct rtnl_dump_filter_arg {
	rtnl_filter_t filter;
	void *arg1;
	rtnl_filter_t junk;
	void *arg2;
};

extern int rtnl_dump_filter_l(struct rtnl_handle *rth,
			      const struct rtnl_dump_filter_arg *arg);
extern int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter,
			    void *arg1, rtnl_filter_t junk, void *arg2);

extern int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
		     unsigned groups, struct nlmsghdr *answer,
		     rtnl_filter_t junk, void *jarg);
extern int rtnl_send(struct rtnl_handle *rth, const char *buf, int);
extern int rtnl_send_check(struct rtnl_handle *rth, const char *buf, int);

extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
extern int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data,
		     int alen);
extern int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
extern struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen,
					  int type, const void *data, int len);
extern int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest);
extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type,
			 const void *data, int alen);

extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta,
			int len);
extern int parse_rtattr_byindex(struct rtattr *tb[], int max,
				struct rtattr *rta, int len);
extern int __parse_rtattr_nested_compat(struct rtattr *tb[], int max,
					struct rtattr *rta, int len);

#define parse_rtattr_nested(tb, max, rta)                                      \
	(parse_rtattr((tb), (max), 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);               \
	})

extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler, void *jarg);
extern int rtnl_from_file(FILE *, rtnl_filter_t handler, void *jarg);

#define NLMSG_TAIL(nmsg)                                                       \
	((struct rtattr *)(((uint8_t *)(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

#endif /* __LIBNETLINK_H__ */

#endif /* __linux__ */
Commit	Line	Data
47a3a827	1	// SPDX-License-Identifier: GPL-2.0-or-later
4d9ad5dc MS	2	/*
	3	* libnetlink.c RTnetlink service routines.
	4	*
4d9ad5dc MS	5	* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
	6	*
	7	*/
	8
	9	#ifdef __linux__
	10
	11	#ifndef __LIBNETLINK_H__
	12	#define __LIBNETLINK_H__ 1
	13
	14	#include <asm/types.h>
	15	#include <linux/netlink.h>
	16	#include <linux/rtnetlink.h>
	17	#include <linux/if_link.h>
	18	#include <linux/if_addr.h>
	19	#include <linux/neighbour.h>
	20
996c9314 LB	21	struct rtnl_handle {
	22	int fd;
	23	struct sockaddr_nl local;
	24	struct sockaddr_nl peer;
	25	__u32 seq;
	26	__u32 dump;
4d9ad5dc MS	27	};
	28
	29	extern int rcvbuf;
	30
	31	extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions);
996c9314 LB	32	extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions,
996c9314 LB	33	int protocol);
4d9ad5dc MS	34	extern void rtnl_close(struct rtnl_handle *rth);
4d9ad5dc MS	35	extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type);
996c9314 LB	36	extern int rtnl_dump_request(struct rtnl_handle rth, int type, void req,
996c9314 LB	37	int len);
4d9ad5dc	38
996c9314 LB	39	typedef int (rtnl_filter_t)(const struct sockaddr_nl , struct nlmsghdr *n,
996c9314 LB	40	void *);
4d9ad5dc	41
996c9314	42	struct rtnl_dump_filter_arg {
4d9ad5dc MS	43	rtnl_filter_t filter;
	44	void *arg1;
	45	rtnl_filter_t junk;
	46	void *arg2;
	47	};
	48
	49	extern int rtnl_dump_filter_l(struct rtnl_handle *rth,
	50	const struct rtnl_dump_filter_arg *arg);
	51	extern int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter,
996c9314	52	void arg1, rtnl_filter_t junk, void arg2);
4d9ad5dc MS	53
	54	extern int rtnl_talk(struct rtnl_handle rtnl, struct nlmsghdr n, pid_t peer,
	55	unsigned groups, struct nlmsghdr *answer,
996c9314	56	rtnl_filter_t junk, void *jarg);
4d9ad5dc MS	57	extern int rtnl_send(struct rtnl_handle rth, const char buf, int);
	58	extern int rtnl_send_check(struct rtnl_handle rth, const char buf, int);
	59
	60	extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
996c9314 LB	61	extern int addattr_l(struct nlmsghdr n, int maxlen, int type, const void data,
996c9314 LB	62	int alen);
4d9ad5dc MS	63	extern int addraw_l(struct nlmsghdr n, int maxlen, const void data, int len);
	64	extern struct rtattr addattr_nest(struct nlmsghdr n, int maxlen, int type);
	65	extern int addattr_nest_end(struct nlmsghdr n, struct rtattr nest);
996c9314 LB	66	extern struct rtattr addattr_nest_compat(struct nlmsghdr n, int maxlen,
996c9314 LB	67	int type, const void *data, int len);
4d9ad5dc MS	68	extern int addattr_nest_compat_end(struct nlmsghdr n, struct rtattr nest);
4d9ad5dc MS	69	extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
996c9314 LB	70	extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type,
996c9314 LB	71	const void *data, int alen);
4d9ad5dc	72
996c9314 LB	73	extern int parse_rtattr(struct rtattr tb[], int max, struct rtattr rta,
	74	int len);
	75	extern int parse_rtattr_byindex(struct rtattr *tb[], int max,
	76	struct rtattr *rta, int len);
	77	extern int __parse_rtattr_nested_compat(struct rtattr *tb[], int max,
	78	struct rtattr *rta, int len);
4d9ad5dc	79
996c9314	80	#define parse_rtattr_nested(tb, max, rta) \
4d9ad5dc MS	81	(parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
4d9ad5dc MS	82
996c9314 LB	83	#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
	84	({ \
	85	data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
	86	__parse_rtattr_nested_compat(tb, max, rta, len); \
	87	})
4d9ad5dc	88
996c9314 LB	89	extern int rtnl_listen(struct rtnl_handle , rtnl_filter_t handler, void jarg);
996c9314 LB	90	extern int rtnl_from_file(FILE , rtnl_filter_t handler, void jarg);
4d9ad5dc	91
996c9314 LB	92	#define NLMSG_TAIL(nmsg) \
	93	((struct rtattr )(((uint8_t )(nmsg)) \
	94	+ NLMSG_ALIGN((nmsg)->nlmsg_len)))
4d9ad5dc MS	95
4d9ad5dc MS	96	#ifndef IFA_RTA
996c9314 LB	97	#define IFA_RTA(r) \
	98	((struct rtattr )(((char )(r)) \
	99	+ NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
4d9ad5dc MS	100	#endif
	101	#ifndef IFA_PAYLOAD
	102	#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
	103	#endif
	104
	105	#ifndef IFLA_RTA
996c9314 LB	106	#define IFLA_RTA(r) \
	107	((struct rtattr )(((char )(r)) \
	108	+ NLMSG_ALIGN(sizeof(struct ifinfomsg))))
4d9ad5dc MS	109	#endif
	110	#ifndef IFLA_PAYLOAD
	111	#define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
	112	#endif
	113
	114	#ifndef NDA_RTA
996c9314 LB	115	#define NDA_RTA(r) \
996c9314 LB	116	((struct rtattr )(((char )(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
4d9ad5dc MS	117	#endif
	118	#ifndef NDA_PAYLOAD
	119	#define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
	120	#endif
	121
	122	#ifndef NDTA_RTA
996c9314 LB	123	#define NDTA_RTA(r) \
996c9314 LB	124	((struct rtattr )(((char )(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
4d9ad5dc MS	125	#endif
	126	#ifndef NDTA_PAYLOAD
	127	#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
	128	#endif
	129
	130	#endif /* __LIBNETLINK_H__ */
	131
	132	#endif /* __linux__ */