tcpspray.ndisc6(1) - phpMan

TCPSPRAY(1)                               User's Manual                               TCPSPRAY(1)

NAME
       tcpspray - TCP/IP bandwidth measurement tool (Discard and Echo client)

SYNOPSIS
       tcpspray  [-46ev]  [-b block_size] [-d wait_<micro>s] [ -f filename] [-n count] <hostname>
       [port]

DESCRIPTON
       tcpspray uses the Discard resp. Echo protocol (RFC 863 resp. RFC 862) to perform bandwidth
       measurements of TCP sessions between the local system, and a Discard resp. Echo server.

       Unix-based  hosts can provide a Discard and/or Echo servers with the Internet super-server
       inetd. On Windows NT, the simple network protocols optional component will do the same.

       The name or address of the server node must be specified. tcpspray will automatically  try
       to  use  IPv6  when  available. If not, or if it fails, it will fallback to IPv4. However,
       tcpspray4 resp. tcpspray6 only try to use IPv4 resp. IPv6.

OPTIONS
       -4 or --ipv4
              Force usage of TCP over IPv4.

       -6 or --ipv6
              Force usage of TCP over IPv6.

       -b block_size or --bsize block_size
              Send block of the specified byte size (default: 1024).

       -d wait_<micro>s or --delay wait_<micro>s
              Waits for the given amount of microseconds after any given was sent before attempt-
              ing to send the next one. There is no delay by default.

       -e or --echo
              Use  the  Echo protocol instead of Discard. tcpspray will measure the time required
              to send data and receive it back, instead of simply sending it.

       -f filename or --fill filename
              Read data from the specified file to fill sent blocks with. If the file is  smaller
              than the size of blocks, or if no file were specified, the remaining trailing bytes
              are all set to zero.

       -h or --help
              Display some help and exit.

       -n block_count or --count block_count
              Send the specified amount of data blocks for the measurements (default: 100).

       -V or --version
              Display program version and license and exit.

       -v or --verbose
              Display more verbose informations. In particular, tcpspray will print  a  dot  each
              time a block is sent. If the Echo protocol is used (option -e), dots will be erased
              as data is received back.

DIAGNOSTICS
       If you get no response while you know the remote host is up, it is most likely that it has
       no Discard/Echo service running, or that these services are blocked by a firewall. Running
       tcptraceroute6(8) resp.  tcptraceroute(8) toward the IPv6 resp.  IPv4  remote  host  might
       help detecting such a situation.

SECURITY
       tcpspray does not require any privilege to run.

SEE ALSO
       tcp(7), inetd(8), tcptraceroute6(8), tcptraceroute(8)

AUTHOR
       Remi Denis-Courmont <remi at remlab dot net>

       http://www.remlab.net/ndisc6/

tcpspray                                      $Date$                                  TCPSPRAY(1)

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