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tcpblast

NAME

tcpblast − tool for measuring network bandwidth

SYNOPSIS

tcpblast [options] destination[:port]

DESCRIPTION

tcpblast/udpblast is a simple tool for probing network and estimating its throughput. By default it sends 300 blocks (1024 bytes each) of data to specified destination host.

Destination can be name or address, IPv4 or IPv6. When IPv6 address is specified with port it should look like: ’[3ffe:8010::1]:9’ (with single quotes to prevent shell expansion of []).

Options
−4, --ipv4
use only ipv4 address
−6, --ipv6
use only ipv6 address
−a
send random data
−b
BUF_SIZE socket buf size (default: −1, don’t change), with
‘−’ to be substracted from results
−c, --count
BLOCKS change default (300) number of blocks, range:
1..10000000
−d
DOTFREQ print dot every DOTFREQ blocks, disables cont.
speed disp.
−h, --help
this help
−i, --delay
DELAY write delay in microseconds ( EXPERIMENTAL )
−l, --last
BLKS show also speed for last BLKS blocks
−m
results for every block in separate line
−n, --nwrite
do not write, use e.g. with chargen port
−o
switch from continuous speed displaying to dots
printing
−p PORT
bind this local PORT
−q --quiet
show only final statistics
−r, --read
read data returned to us, switches default port to
echo
−R, --rate
RATESPEC limit the speed according to the RATESPEC
−s
BLOCK_SIZE block size (default 1024 bytes)
−t
MAXTIME limit time to MAXTIME (up to 42950 h)
--tcp
use TCP (default)
--udp
use UDP (default if named udpblast)
−v, --verbosity
verbosity, default 0, maximum 3. −v adds time
display, −vv also speed in B/s, −v − speed in b/s.
−V
, --version version
destination
host name or address
port
use port #/name xyz instead of default port 9

RATESPEC RATE [, TIME ][: RATE [, TIME ]]... RATE generating data at RATE speed in B/s TIME for TIME seconds (can be floating point number), last can
be omitted and that time will be infinite

Options −b, −c, −R, −s and −t can use case insensitive unit multipliers and specifiers:
size (bytes):
−b and −s argument without units is in bytes, can use [{k,m,g}]b (lower
or upper case) for KB , MB or GB . {k,m,g} are powers of 1024.
number:
−c argument is just a number, can have k, m or g added (powers of 1024),
no unit needed
rate (bytes pes second):
−R RATE is in B/s or Bps, the postfixes can be [{k,m,g}]{b/s,bps}
time (seconds):
−t and −R TIME argument is in seconds, can be postfixed with
[{k,m,g}]{s,min,h,w,m,y}

Example:
tcpblast −b 4KB −c 10k −R 10kbps,2:20kbps,3s target

tcpblast version: FreeBSD + rzm 20001030

BUGS

Rafal says that he is a perfectly bad and careless maintainer :)

If You found any other bugs send it to him.

AUTHORS

Software: dfk AT nic DOT eu DOT net (Daniel Karrenberg − acc. to
FreeBSD version)
Maintained by: Rafal Maszkowski <rzm AT icm DOT edu DOT pl>
Manual page: Artur R. Czechowski <arturcz AT bofh DOT org DOT pl>, Oct
1999; rzm, Oct 2000

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