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sfk udpdump [options] [group] port
create human-readable hexdump of UDP socket input,
for debugging of UDP network applications.
options
-showle highlights line ending characters CR and LF.
you may also add "le" to the command name.
-wide dumps 32 input bytes per line.
-lean dumps 16 input bytes per line.
-post reduced format e.g. for forum posts
-min minimal format with alnum only text
-time show date and time of receive
-echo echo received packets back to sender.
-stop or stop=n stops after n received packages.
with command chaining, default is -stop=1.
-sep[arator] prints detailed separator between packages
with message number, source IP and time.
-broad listen for broadcast on given port.
-pure lists flat hex characters:
53464B2D544553540D0A
-hexsrc lists hex comma separated values:
0x53,0x46,0x4B,0x2D,0x54,0x45,0x53,0x54,0x0D,0x0A,
-decsrc lists decimal comma separated values:
83,70,75,45,84,69,83,84,13,10,
-maxdump=n dump only first n bytes of incoming data.
-flat no hexdump, print characters as they come.
-nohead does not show the "received n bytes" message.
-text just print text, same as -flat -nohead.
use -sep to show a header per message.
-tofile x write output to file x.
message filtering
show only messages ...
-from "s1,s2" from IPs containing text s1 or s2.
note that packages from the same
machine may use an IP 127.0.0.1
-from "s1 s2" same as -from "s1,s2".
multiple -from can also be given.
-notfrom "s" not from IP containing text s,
with ".10" matching .10 and .100
but ".10/" matching only .10.
multiple -notfrom can be given.
-size n with this size
-minsize n larger or equal to n
-maxsize n smaller or equal to n
-data foo containing text "foo"
-data 0xa0a1 containing binary data 0xa0a1
experimental multicast receive
if a multicast group IP address is given, like
sfk udpdump 224.0.0.123 5000
then udpdump tries to print incoming multicast messages.
this may or may not work depending on the OS, network
interface, router and firewall settings, user rights and
other programs running in parallel.
if you cannot receive any udp from other ip's
this can be caused by the Windows Firewall.
special protocol support
sfk udpdump -bon - print bonjour messages
sfk udpdump -knx - print knx messages (sfk help knx)
see also
sfk udpsend - send UDP packets.
sfk hexdump - for further format options.
examples
sfk udpdump 5000
waits on port 5000 for incoming udp packages.
sfk udpdump 5000 -from .10
show only packages from ip's containing .10
like 192.168.100.1 or 192.168.1.100
sfk udpdump 5000 -from ".100/,.101/,.102/"
show only from ip's ending .100, .101 or .102
e.g. 192.168.1.100 but not 192.168.100.1
sfk udpdump [options] [group] port
create human-readable hexdump of UDP socket
input, for debugging of UDP network
applications.
options
-showle highlights line ending
characters CR and LF. you may
also add "le" to the command
name.
-wide dumps 32 input bytes per line.
-lean dumps 16 input bytes per line.
-post reduced format e.g. for
forum posts
-min minimal format with alnum
only text
-time show date and time of receive
-echo echo received packets back to
sender.
-stop or stop=n stops after n
received packages. with command
chaining, default is -stop=1.
-sep[arator] prints detailed separator
between packages
with message number, source IP
and time.
-broad listen for broadcast on
given port.
-pure lists flat hex characters:
53464B2D544553540D0A
-hexsrc lists hex comma separated
values: 0x53,0x46,0x4B,0x2D,
0x54,0x45,0x53,0x54,0x0D,0x0A,
-decsrc lists decimal comma separated
values: 83,70,75,45,84,69,83,
84,13,10,
-maxdump=n dump only first n bytes of
incoming data.
-flat no hexdump, print
characters as they come.
-nohead does not show the "received
n bytes" message.
-text just print text, same as
-flat -nohead. use -sep to
show a header per message.
-tofile x write output to file x.
message filtering
show only messages ...
-from "s1,s2" from IPs containing text
s1 or s2. note that
packages from the same
machine may use an IP 127.
0.0.1
-from "s1 s2" same as -from "s1,s2".
multiple -from can also
be given.
-notfrom "s" not from IP containing
text s, with ".10"
matching .10 and .100 but
".10/" matching only .10.
multiple -notfrom can be
given.
-size n with this size
-minsize n larger or equal to n
-maxsize n smaller or equal to n
-data foo containing text "foo"
-data 0xa0a1 containing binary
data 0xa0a1
experimental multicast receive
if a multicast group IP address is given,
like
sfk udpdump 224.0.0.123 5000
then udpdump tries to print incoming
multicast messages.
this may or may not work depending on
the OS, network
interface, router and firewall settings,
user rights and other programs running
in parallel.
if you cannot receive any udp from
other ip's
this can be caused by the Windows
Firewall.
special protocol support
sfk udpdump -bon - print bonjour
messages
sfk udpdump -knx - print knx messages
(sfk help knx)
see also
sfk udpsend - send UDP packets.
sfk hexdump - for further format
options.
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