SOCKADDR_IN Structure

The SOCKADDR_IN structure has the following form:

struct sockaddr_in{
    short            sin_family;
    unsigned short      sin_port;
    struct   in_addr      sin_addr;
    char               sin_zero[8];
};

In the Internet address family, the SOCKADDR_IN structure is used by Windows Sockets to specify a local or remote endpoint address to which to connect a socket. This is the form of the SOCKADDR structure specific to the Internet address family and can be cast to SOCKADDR.

Members

sin_family

Address family (must be AF_INET).

sin_port

IP port.

sin_addr

IP address.

sin_zero

Padding to make structure the same size as SOCKADDR.

Comments

The IP address component of this structure is of type IN_ADDR. The IN_ADDR structure is defined in Windows Sockets header file WINSOCK.H as follows:

struct   in_addr {
    union   {
         struct{
             unsigned  char   s_b1,
                              s_b2,
                              s_b3,
                              s_b4;
        }  S_un_b;
             struct  {
             unsigned  short  s_w1,
                              s_w2;
              }  S_un_w;
               unsigned long  S_addr;
     } S_un;
};

For more information, see in the Win32 SDK documentation.

See Also   SOCKADDR