blob: 311cf3fc90f883f47c7d65b15faabb1ca0ed6451 [file] [log] [blame]
/* 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_nsiddump_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_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((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
#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__ */