45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
// Copyright 2011-2018 Nicholas J. Kain <njkain at gmail dot com>
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// SPDX-License-Identifier: MIT
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#ifndef NK_NL_H_
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#define NK_NL_H_
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// Limited netlink code. The horrors...
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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static inline int nlmsg_get_error(const struct nlmsghdr *nlh)
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{
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const struct nlmsgerr *err = (const struct nlmsgerr *)NLMSG_DATA(nlh);
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if (nlh->nlmsg_len < sizeof(struct nlmsgerr) + NLMSG_HDRLEN)
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return EBADMSG;
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return -err->error;
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}
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int rtattr_assign(struct rtattr *attr, int type, void *data);
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int nl_add_rtattr(struct nlmsghdr *n, size_t max_length, int type,
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const void *data, size_t data_length);
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typedef int (*nl_rtattr_parse_fn)(struct rtattr *attr, int type, void *data);
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void nl_rtattr_parse(const struct nlmsghdr *nlh, size_t offset,
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nl_rtattr_parse_fn workfn, void *data);
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ssize_t nl_recv_buf(int fd, char *buf, size_t blen);
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typedef void (*nlmsg_foreach_fn)(const struct nlmsghdr *, void *);
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int nl_foreach_nlmsg(char *buf, size_t blen, uint32_t seq,
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uint32_t portid,
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nlmsg_foreach_fn pfn, void *fnarg);
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int nl_sendgetlinks(int fd, uint32_t seq);
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int nl_sendgetlink(int fd, uint32_t seq, int ifindex);
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int nl_sendgetaddr(int fd, uint32_t seq, uint32_t ifindex);
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int nl_sendgetaddr4(int fd, uint32_t seq, uint32_t ifindex);
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int nl_sendgetaddr6(int fd, uint32_t seq, uint32_t ifindex);
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int nl_sendgetaddrs(int fd, uint32_t seq);
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int nl_sendgetaddrs4(int fd, uint32_t seq);
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int nl_sendgetaddrs6(int fd, uint32_t seq);
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int nl_open(int nltype, unsigned nlgroup, uint32_t *nlportid);
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#endif
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