text: #ifndef PRIV_NETLINK_H
  #define PRIV_NETLINK_H
  
  /* Private copy of needed Linux netlink/rtnetlink definitions.
   *
   * This should be replaced with user space header once one is available with C
   * library, etc..
   */
  
  #ifndef IFLA_IFNAME
  #define IFLA_IFNAME 3
  #endif
  #ifndef IFLA_WIRELESS
  #define IFLA_WIRELESS 11
  #endif
  
  #define NETLINK_ROUTE 0
  #define RTMGRP_LINK 1
  #define RTM_BASE 0x10
  #define RTM_NEWLINK (RTM_BASE + 0)
  #define RTM_DELLINK (RTM_BASE + 1)
  
  #define NLMSG_ALIGNTO 4
  #define NLMSG_ALIGN(len) (((len) + NLMSG_ALIGNTO - 1) & ~(NLMSG_ALIGNTO - 1))
  #define NLMSG_LENGTH(len) ((len) + NLMSG_ALIGN(sizeof(struct nlmsghdr)))
  #define NLMSG_DATA(nlh) ((void*) (((char*) nlh) + NLMSG_LENGTH(0)))
  
  #define RTA_ALIGNTO 4
  #define RTA_ALIGN(len) (((len) + RTA_ALIGNTO - 1) & ~(RTA_ALIGNTO - 1))
  #define RTA_OK(rta,len) \
  ((len) > 0 && (rta)->rta_len >= sizeof(struct rtattr) && \
  (rta)->rta_len <= (len))
  #define RTA_NEXT(rta,attrlen) \
  ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
  (struct rtattr *) (((char *)(rta)) + RTA_ALIGN((rta)->rta_len)))
  
  
  struct sockaddr_nl
  {
  	sa_family_t nl_family;
  	unsigned short nl_pad;
  	u32 nl_pid;
  	u32 nl_groups;
  };
  
  struct nlmsghdr
  {
  	u32 nlmsg_len;
  	u16 nlmsg_type;
  	u16 nlmsg_flags;
  	u32 nlmsg_seq;
  	u32 nlmsg_pid;
  };
  
  struct ifinfomsg
  {
  	unsigned char ifi_family;
  	unsigned char __ifi_pad;
  	unsigned short ifi_type;
  	int ifi_index;
  	unsigned ifi_flags;
  	unsigned ifi_change;
  };
  
  struct rtattr
  {
  	unsigned short rta_len;
  	unsigned short rta_type;
  };
  
  #endif /* PRIV_NETLINK_H */
  