/* 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

#endif /* __LIBNETLINK_H__ */