netlink.h

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#ifndef __VSF_LINUX_NETLINK_H__
#define __VSF_LINUX_NETLINK_H__
 
#if VSF_LINUX_CFG_RELATIVE_PATH == ENABLED
#   include "../sys/socket.h"
#else
#   include <sys/socket.h>
#endif
 
#define NLMSG_NOOP          0x1
#define NLMSG_ERROR         0x2
#define NLMSG_DONE          0x3
#define NLMSG_OVERRUN       0x4
 
#define NETLINK_ROUTE       0
 
struct sockaddr_nl {
    sa_family_t             nl_family;
    uint16_t                nl_pad;
    uint32_t                nl_pid;
    uint32_t                nl_groups;
};
 
struct nlmsghdr {
    uint32_t                nlmsg_len;
    uint16_t                nlmsg_type;
    uint16_t                nlmsg_flags;
    uint16_t                nlmsg_seq;
    uint16_t                nlmsg_pid;
};
 
struct nlmsgerr {
    int                     error;
    struct nlmsghdr         msg;
};
 
#define NLMSG_ALIGNTO       4U
#define NLMSG_ALIGN(len)    (((len) + NLMSG_ALIGNTO - 1) & ~(NLMSG_ALIGNTO - 1))
#define NLMSG_HDRLEN        ((int)NLMSG_ALIGN(sizeof(struct nlmsghdr)))
#define NLMSG_LENGTH(len)   ((len) + NLMSG_HDRLEN)
#define NLMSG_SPACE(len)    NLMSG_ALIGN(NLMSG_LENGTH(len))
#define NLMSG_DATA(nlh)     ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
#define NLMSG_NEXT(nlh, len)((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
                            (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
#define NLMSG_OK(nlh,len)   ((len) >= (int)sizeof(struct nlmsghdr) && \
                            (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
                            (nlh)->nlmsg_len <= (len))
#define NLMSG_PAYLOAD(nlh, len)     ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
 
#endif      // __VSF_LINUX_NETLINK_H__