"Linux Network Programming" Network IP address structure

  (1) The IPV4 socket address structure is also commonly referred to as the "Internetwork Sockets address Structure", which is named "Sockaddr_in", and the
        is defined in the <netinet/in.h>
        struct sockaddr_in{
            uint8_t Sin_len;//Entire Sock Addr_in structure length
            sa_family sin_family;//Specify this address family, which must be set to Af_inet
  & nbsp         in_port_t Sin_port; Port
            struct in_addr sin_addr//piv4 address
            Char sin_sero[8]; Temporarily unused, typically set to 0
       };

  (2) Generic address structure to specify the address associated with the socket
       struct sockaddr{
           uint8_t Sin_len; Length of the entire SOCKADDR structure
           sa_family sin_family;//Specify this address family
      & nbsp    char sa_data[14]; Determined by the sin_famly its form
       };

Linux Network Programming network IP address structure