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sctp_darn(1)							  sctp_darn(1)

NAME
       sctp_darn - Send and receive messages via SCTP

SYNOPSIS
       sctp_darn   -H	local_address	-P  local_port	[-h  remote_host]  [-p
       remote_port] -l|s

DESCRIPTION
       This is a userspace test application for the SCTP Linux	kernel	refer‐
       ence  implementation state machine.  It is vaguely inspired by Stevens'
       program "sock".

       It has the limited ability to send messages and to listen for  messages
       sent via SCTP.

OPTIONS
       -H, --local local_address
	      specify one of the local addresses

       -P, --local-port local_port
	      specify the port number for local addresses

       -h, --remote remote_address
	      specify the peer address

       -p, --remote-port remote_port
	      specify the port number for the peer address

       -l, --listen
	      print messages received from the peer

       -s, --send
	      send messages to the peer

       -B, --bindx-add address
	      add  the	specified  address(es) as additional bind addresses to
	      the local socket. Multiple addresses can be  specified  by  this
	      argument	 multiple   times.    For  example,  '-B  10.0.0.1  -B
	      20.0.0.2'.

       -b, --bindx-rem address
	      remove the specified address(es) from the bind addresses of  the
	      local  socket. Multiple addresses can be specified by this argu‐
	      ment multiple times.  For example, '-b 10.0.0.1 -b 20.0.0.2'.

       -I     use the interactive mode.

       -i     setup the specified number of endpoints by using	the  specified
	      local  host  (-H)	 and  local port (-P). The port number will be
	      incremented by one for each additional endpoint.	All  of	 these
	      endpoints will be listening.  If a remote host (-h) and a remote
	      port are also specified, the first endpoint will	start  sending
	      fixed sized messages to the remote host.

       -m size
	      specify the sockopt sndbuf/rcvbuf size.

       -n     set  the socket(s) to be in the non-blocking mode.  collect mes‐
	      sages from stdin and deliver them to the peer

       --use-poll
	      use system call poll() for polling among the number of endpoints
	      specified	 by the -i option. Without this option, select() would
	      be used as default.

       -t     use SOCK_STREAM tcp-style sockets.

       -z size
	      specify the message size to be sent.  The default	 message  size
	      generated would be 16K.

       --interface ifname
	      select interface for sin6_scope_id.

AUTHOR
       Michael Biebl <biebl@debian.org>

								  sctp_darn(1)

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