| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | #ifndef NETLINK_HELPERS_H |
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| 3 | #define NETLINK_HELPERS_H |
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| 4 | |
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| 5 | #include <string.h> |
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| 6 | #include <linux/netlink.h> |
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| 7 | #include <linux/rtnetlink.h> |
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| 8 | |
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| 9 | struct rtnl_handle { |
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| 10 | int fd; |
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| 11 | struct sockaddr_nl local; |
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| 12 | struct sockaddr_nl peer; |
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| 13 | __u32 seq; |
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| 14 | __u32 dump; |
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| 15 | int proto; |
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| 16 | FILE *dump_fp; |
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| 17 | #define RTNL_HANDLE_F_LISTEN_ALL_NSID 0x01 |
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| 18 | #define RTNL_HANDLE_F_SUPPRESS_NLERR 0x02 |
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| 19 | #define RTNL_HANDLE_F_STRICT_CHK 0x04 |
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| 20 | int flags; |
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| 21 | }; |
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| 22 | |
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| 23 | #define NLMSG_TAIL(nmsg) \ |
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| 24 | ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len))) |
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| 25 | |
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| 26 | typedef int (*nl_ext_ack_fn_t)(const char *errmsg, uint32_t off, |
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| 27 | const struct nlmsghdr *inner_nlh); |
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| 28 | |
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| 29 | int rtnl_open(struct rtnl_handle *rth, unsigned int subscriptions) |
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| 30 | __attribute__((warn_unused_result)); |
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| 31 | void rtnl_close(struct rtnl_handle *rth); |
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| 32 | int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, |
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| 33 | struct nlmsghdr **answer) |
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| 34 | __attribute__((warn_unused_result)); |
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| 35 | |
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| 36 | int addattr(struct nlmsghdr *n, int maxlen, int type); |
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| 37 | int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data); |
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| 38 | int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data); |
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| 39 | int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data); |
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| 40 | int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data); |
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| 41 | int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *data); |
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| 42 | int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data, int alen); |
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| 43 | int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len); |
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| 44 | struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type); |
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| 45 | int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest); |
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| 46 | #endif /* NETLINK_HELPERS_H */ |
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| 47 | |
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