TCP/IP Data Structures

The INTERFACE_INFO structure is used in conjunction with the SIO_GET_INTERFACE_LIST ioctl command. It is defined in Ws2tcpip.h file and is reproduced here.

typedef struct _INTERFACE_INFO
{
    u_long    iiFlags;      /* Type and status of the interface */
    struct sockaddr    iiAddress;        /* Interface address */
    struct sockaddr    iiBroadcastAddress;     /* Broadcast address */
    struct sockaddr    iiNetmask;        /* Network mask */
} INTERFACE_INFO;
 

Members

iiFlags

A bitmask describing the status of the interface. The following flags are possible:

IFF_UP

The interface is running.

IFF_BROADCAST

The broadcast feature is supported

IFF_LOOPBACK

The loopback interface is running.

IFF_POINTTOPOINT

The interface is using point-to-point link.

IFF_MULTICAST

The multicast feature is supported.

iiAddress

The address of the interface.

iiBroadcastAddress

The broadcast address of the interface or the address of the other side for point-to-point links.

iiNetmask

The netmask used by the interface.