sctp_darn - Send and receive messages via SCTP

       Michael Biebl <biebl@debian.org>

                                                                                                    sctp_darn(1)

       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.

       sctp_darn - Send and receive messages via SCTP

       -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.

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