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 reference 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 argument 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 messages 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)