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NetBSD 6.1.5 - man page for cltp (netbsd section 4)

CLTP(4) 			   BSD Kernel Interfaces Manual 			  CLTP(4)

     cltp -- ISO Connectionless Transport Protocol

     #include <sys/socket.h>
     #include <netiso/iso.h>

     socket(AF_ISO, SOCK_DGRAM, 0);

     CLTP is a simple, unreliable datagram protocol which is accessed via the SOCK_DGRAM abstrac-
     tion for the ISO protocol family.	CLTP sockets are connectionless, and are normally used
     with the sendto(2) and recvfrom(2) calls, though the connect(2) call may also be used to fix
     the destination for future packets (in which case the recv(2) or read(2) and send(2) or
     write(2) system calls may be used).

     CLTP address formats are identical to those used by TP.  In particular CLTP provides a ser-
     vice selector in addition to the normal ISO NSAP.	Note that the CLTP selector space is sep-
     arate from the TP selector space (i.e. a CLTP selector may not be ``connected'' to a TP

     Options at the CLNP network level may be used with CLTP; see clnp(4).

     A socket operation may fail with one of the following errors returned:

     [EISCONN]	      when trying to establish a connection on a socket which already has one, or
		      when trying to send a datagram with the destination address specified and
		      the socket is already connected;

     [ENOTCONN]       when trying to send a datagram, but no destination address is specified,
		      and the socket hasn't been connected;

     [ENOBUFS]	      when the system runs out of memory for an internal data structure;

     [EADDRINUSE]     when an attempt is made to create a socket with a selector which has
		      already been allocated;

     [EADDRNOTAVAIL]  when an attempt is made to create a socket with a network address for which
		      no network interface exists.

     getsockopt(2), recv(2), send(2), socket(2), clnp(4), intro(4), iso(4)

BSD					   June 9, 1993 				      BSD

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