56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
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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 nl_attr_ok(const struct nlattr *attr, size_t len)
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{
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if (len < sizeof *attr)
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return 0;
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if (attr->nla_len < sizeof *attr)
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return 0;
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if (attr->nla_len > len)
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return 0;
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return 1;
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}
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static inline size_t nlattr_get_len(const struct nlattr *attr)
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{
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return attr->nla_len;
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}
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static inline void *nlattr_get_data(const struct nlattr *attr)
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{
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return (char *)attr + NLA_HDRLEN;
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}
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static inline void *nlmsg_get_data(const struct nlmsghdr *nlh)
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{
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return (char *)nlh + NLMSG_HDRLEN;
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}
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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 = nlmsg_get_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 & 0x7fffffff;
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}
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typedef int (*nl_attr_parse_fn)(struct nlattr *attr, int type, void *data);
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void nl_attr_parse(const struct nlmsghdr *nlh, size_t offset,
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nl_attr_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 int (*nlmsg_foreach_fn)(const struct nlmsghdr *, void *);
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int nl_foreach_nlmsg(char *buf, size_t blen, int portid,
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nlmsg_foreach_fn pfn, void *fnarg);
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int nl_open(int nltype, int nlgroup, int *nlportid);
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#endif /* NK_NL_H_ */
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