ATALK(4F)																 ATALK(4F)

NAME

       atalk - AppleTalk protocol family

SYNOPSIS

       #include <sys/types.h>
       #include <netatalk/at.h>

DESCRIPTION

       The  AppleTalk protocol family is a collection of protocols layered above the Datagram Delivery Protocol (DDP), and using AppleTalk address
       format. The AppleTalk family may provide SOCK_STREAM (ADSP), SOCK_DGRAM (DDP), SOCK_RDM (ATP), and SOCK_SEQPACKET  (ASP).  Currently,  only
       DDP is implemented in the kernel; ATP and ASP are implemented in user level libraries; and ADSP is planned.

ADDRESSING

       AppleTalk addresses are three byte quantities, stored in network byte order. The include file <netatalk/at.h> defines the AppleTalk address
       format.

       Sockets in the AppleTalk protocol family use the following address structure:

	      struct sockaddr_at {
		   short	  sat_family;
		   u_char	  sat_port;
		   struct at_addr sat_addr;
		   char      sat_zero[ 8 ];
	      };

       The port of a socket may be set with bind(2).  The node for bind must always be ATADDR_ANYNODE: ``this node.'' The net may be ATADDR_ANYNET
       or  ATADDR_LATENET.   ATADDR_ANYNET  coresponds	to  the  machine's  ``primary'' address (the first configured).  ATADDR_LATENET causes the
       address in outgoing packets to be determined when a packet is sent, i.e. determined late.  ATADDR_LATENET  is  equivalent  to  opening  one
       socket for each network interface.  The port of a socket and either the primary address or ATADDR_LATENET are returned with getsockname(2).

SEE ALSO

       bind(2), getsockname(2), atalkd(8).

netatalk 1.2							    17 Dec 1991 							 ATALK(4F)