struct ifreq

looking8

struct ifreq
For more information, please post to me

orangedj

struct ifreq {
    char ifr_name [IFNAMSIZ]; / * interface name, e.g., "le0" * /
    union {
        struct sockaddr ifru_addr;
        struct sockaddr ifru_dstaddr;
        struct sockaddr ifru_broadaddr;
        short ifru_flags;
        int ifru_metric;
        caddr_t ifru_data;
    } ifr_ifru;
};

leohuangfu

I am looking for too, haha

edith819

/* Interface request structure used for socket ioctl's. All interface
   ioctl's must have parameter definitions which begin with ifr_name.
   The remainder may be interface specific. */

struct ifreq
  {
# define IFHWADDRLEN 6
# define IFNAMSIZ IF_NAMESIZE
    union
      {
char ifrn_name[IFNAMSIZ]; /* Interface name, e.g. "en0". */
      } ifr_ifrn;

    union
      {
struct sockaddr ifru_addr;
struct sockaddr ifru_dstaddr;
struct sockaddr ifru_broadaddr;
struct sockaddr ifru_netmask;
struct sockaddr ifru_hwaddr;
short int ifru_flags;
int ifru_ivalue;
int ifru_mtu;
struct ifmap ifru_map;
char ifru_slave[IFNAMSIZ]; /* Just fits the size */
char ifru_newname[IFNAMSIZ];
__caddr_t ifru_data;
      } ifr_ifru;
  };
# define ifr_name ifr_ifrn.ifrn_name /* interface name */
# define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */
# define ifr_addr ifr_ifru.ifru_addr /* address */
# define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-p lnk */
# define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
# define ifr_netmask ifr_ifru.ifru_netmask /* interface net mask */
# define ifr_flags ifr_ifru.ifru_flags /* flags */
# define ifr_metric ifr_ifru.ifru_ivalue /* metric */
# define ifr_mtu ifr_ifru.ifru_mtu /* mtu */
# define ifr_map ifr_ifru.ifru_map /* device map */
# define ifr_slave ifr_ifru.ifru_slave /* slave device */
# define ifr_data ifr_ifru.ifru_data /* for use by interface */
# define ifr_ifindex ifr_ifru.ifru_ivalue /* interface index */
# define ifr_bandwidth ifr_ifru.ifru_ivalue /* link bandwidth */
# define ifr_qlen ifr_ifru.ifru_ivalue /* queue length */
# define ifr_newname ifr_ifru.ifru_newname /* New name */
# define _IOT_ifreq _IOT(_IOTS(char),IFNAMSIZ,_IOTS(char),16,0,0)
# define _IOT_ifreq_short _IOT(_IOTS(char),IFNAMSIZ,_IOTS(short),1,0,0)
# define _IOT_ifreq_int _IOT(_IOTS(char),IFNAMSIZ,_IOTS(int),1,0,0)

cbm19851015

The ifreq structure is defined in /usr/include/net/if.h, which is used to configure the ip address, activate the interface, configure the MTU and other interface information.
It contains the name and specific content of an interface-(it is a community, which may be an IP address, broadcast address, subnet mask, MAC number, MTU or other content).
ifreq is contained in the ifconf structure. The ifconf structure is usually used to store all interface information.

If you want to learn more, I recommend the following URL, which explains in great detail:
http://tech.sunplusedu.com/space/post-4064.aspx

realize330

Thank you upstairs. . I will take a good look. .