92 lines
2.4 KiB
Plaintext
92 lines
2.4 KiB
Plaintext
.TH CLNP 4P "9 December 1988"
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.ds ]W Wisconsin ARGO 1.0
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.UC 4
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.SH NAME
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clnp \- Connectionless-Mode Network Protocol
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.SH SYNOPSIS
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.B #include <sys/socket.h>
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.br
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.B #include <netargo/iso.h>
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.br
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.B #include <netargo/clnp.h>
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.PP
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.B s = socket(AF_ISO, SOCK_RAW, 0);
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.SH DESCRIPTION
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CLNP is the connectionless-mode network protocol used by the
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connectionless-mode network service. This protocol is specified in
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ISO 8473.
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It may be accessed
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through a \*(lqraw socket\*(rq for debugging purposes only.
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CLNP sockets are connectionless,
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and are normally used with the
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.I sendto
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and
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.I recvfrom
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calls, though the
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.IR connect (2)
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call may also be used to fix the destination for future
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packets (in which case the
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.IR read (2)
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or
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.IR recv (2)
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and
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.IR write (2)
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or
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.IR send (2)
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system calls may be used).
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.PP
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Outgoing packets automatically have a CLNP header prepended to
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them. Incoming packets received by the user contain the full CLNP header.
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The following \fIsetsockopt\fR options apply to CLNP:
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.TP
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CLNPOPT_FLAGS
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Sets the flags which are passed to clnp when sending a datagram.
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Valid flags are:
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.nf
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.br
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CLNP_NO_SEG-Do not allow segmentation
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CLNP_NO_ER-Suppress ER pdus
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CLNP_NO_CKSUM-Do not generate the CLNP checksum
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.br
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.fi
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.TP
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CLNPOPT_OPTS
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Sets CLNP options. The options must be formatted exactly as specified by
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ISO 8473, section 7.5 "Options Part." Once an option has been set, it will
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be sent on all packets until a different option is set.
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.SH DIAGNOSTICS
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A socket operation may fail with one of the following errors returned:
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.TP 15
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[EISCONN]
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when trying to establish a connection on a socket which
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already has one, or when trying to send a datagram with the destination
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address specified and the socket is already connected;
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.TP 15
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[ENOTCONN]
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when trying to send a datagram, but
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no destination address is specified, and the socket hasn't been
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connected;
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.TP 15
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[ENOBUFS]
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when the system runs out of memory for
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an internal data structure;
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.TP 15
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[EADDRNOTAVAIL]
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when an attempt is made to create a
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socket with a network address for which no network interface
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exists;
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.TP 15
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[EHOSTUNREACH]
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when trying to send a datagram, but no route to the destination
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address exists.
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.TP 15
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[EINVAL]
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when specifying unsupported options.
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.SH SEE ALSO
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send(2), recv(2), intro(4N), iso(4F)
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.SH BUGS
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Packets are sent with the type code of 0x1d (technically an invalid
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packet type) for lack of a better way to identify raw CLNP packets.
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.PP
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No more than MLEN bytes of options can be specified.
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