47 lines · c
1/* SPDX-License-Identifier: GPL-2.0-or-later */2#ifndef NETLINK_HELPERS_H3#define NETLINK_HELPERS_H4 5#include <string.h>6#include <linux/netlink.h>7#include <linux/rtnetlink.h>8 9struct rtnl_handle {10 int fd;11 struct sockaddr_nl local;12 struct sockaddr_nl peer;13 __u32 seq;14 __u32 dump;15 int proto;16 FILE *dump_fp;17#define RTNL_HANDLE_F_LISTEN_ALL_NSID 0x0118#define RTNL_HANDLE_F_SUPPRESS_NLERR 0x0219#define RTNL_HANDLE_F_STRICT_CHK 0x0420 int flags;21};22 23#define NLMSG_TAIL(nmsg) \24 ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))25 26typedef int (*nl_ext_ack_fn_t)(const char *errmsg, uint32_t off,27 const struct nlmsghdr *inner_nlh);28 29int rtnl_open(struct rtnl_handle *rth, unsigned int subscriptions)30 __attribute__((warn_unused_result));31void rtnl_close(struct rtnl_handle *rth);32int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,33 struct nlmsghdr **answer)34 __attribute__((warn_unused_result));35 36int addattr(struct nlmsghdr *n, int maxlen, int type);37int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data);38int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data);39int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);40int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data);41int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *data);42int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data, int alen);43int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);44struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);45int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);46#endif /* NETLINK_HELPERS_H */47