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Headers                                               in.h(3HEAD)



NAME
     in.h, in - Internet Protocol family

SYNOPSIS
     #include 


DESCRIPTION
     The    header  defines  the  following   types
     through typedef:

     in_port_t    An unsigned integral type of exactly 16 bits.


     in_addr_t    An unsigned integral type of exactly  32  bits.
                  The    header defines the in_addr
                  structure that includes the following member:



     The  header defines the in_addr structure that
     includes the following member:

       in_addr_t       s_addr



     The  header defines the  type  sa_family_t  as
     described in socket.h(3HEAD).


     The  header defines the following  macros  for
     use as values of the level argument of getsockopt() and set-
     sockopt():

     IPPROTO_IP           Dummy for  IP


     IPPROTO_ICMP         Control message protocol


     IPPROTO_TCP          TCP


     IPPROTO_UDP          User     datagram     protocol      The
                            header defines the fol-
                          lowing macros for  use  as  destination
                          addresses for connect(), sendmsg(), and
                          sendto():






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Headers                                               in.h(3HEAD)



     INADDR_ANY           Local host address


     INADDR_BROADCAST     Broadcast address



     The  header defines the sockaddr_in  structure
     that  is  used  to store addresses for the Internet protocol
     family.  Values of this type must be cast to struct sockaddr
     for use with the socket interfaces.

  Default
     For applications that  do  not  require  standard-conforming
     behavior  (those that use the socket interfaces described in
     section (3SOCKET) of the reference manual; see Intro(3)  and
     standards(5)),   the      header  defines  the
     sockaddr_in structure that includes the following members:

       sa_family_t     sin_family
       in_port_t       sin_port
       struct in_addr  sin_addr
       char            sin_zero[8]


  Standard conforming
     For applications that require  standard-conforming  behavior
     (those  that  use the socket interfaces described in section
     (3XNET) of the reference  manual;  see  Intro(3)  and  stan-
     dards(5)), the  header defines the sockaddr_in
     structure that includes the following members:

       sa_family_t     sin_family
       in_port_t       sin_port
       struct in_addr  sin_addr
       unsigned char   sin_zero[8]


ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:














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Headers                                               in.h(3HEAD)



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | Standard                    | See standards(5).           |
    |_____________________________|_____________________________|


SEE ALSO
     Intro(3),         connect(3SOCKET),          connect(3XNET),
     getsockopt(3SOCKET),   getsockopt(3XNET),  sendmsg(3SOCKET),
     sendmsg(3XNET),       sendto(3SOCKET),        sendto(3XNET),
     setsockopt(3SOCKET),   setsockopt(3XNET),   socket.h(3HEAD),
     attributes(5), standards(5)








































SunOS 5.11          Last change: 30 Aug 2002                    3