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-1

I need some tool like this one for Linux. I need not a GUI (i.e. GUI/CLI -- this is not so important), but I need to be able to make a server which can listen at any port, receive and send a raw (i.e. a hex dump) data.

linux tcp udp

share|improve this question

edited Oct 16 '15 at 18:34

Serge Roussak

asked Oct 15 '15 at 8:57

Serge RoussakSerge Roussak

19188 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Your reference link is no longer valid so unfortunately your question no longer has any usable content.
  
  – roaima
  12 mins ago
  

  
  
  
  

add a comment | 

-1

I need some tool like this one for Linux. I need not a GUI (i.e. GUI/CLI -- this is not so important), but I need to be able to make a server which can listen at any port, receive and send a raw (i.e. a hex dump) data.

linux tcp udp

share|improve this question

edited Oct 16 '15 at 18:34

Serge Roussak

asked Oct 15 '15 at 8:57

Serge RoussakSerge Roussak

19188 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Your reference link is no longer valid so unfortunately your question no longer has any usable content.
  
  – roaima
  12 mins ago
  

  
  
  
  

add a comment | 

I need some tool like this one for Linux. I need not a GUI (i.e. GUI/CLI -- this is not so important), but I need to be able to make a server which can listen at any port, receive and send a raw (i.e. a hex dump) data.

linux tcp udp

share|improve this question

edited Oct 16 '15 at 18:34

Serge Roussak

asked Oct 15 '15 at 8:57

Serge RoussakSerge Roussak

19188 bronze badges

share|improve this question

edited Oct 16 '15 at 18:34

Serge Roussak

asked Oct 15 '15 at 8:57

Serge RoussakSerge Roussak

19188 bronze badges

share|improve this question

edited Oct 16 '15 at 18:34

Serge Roussak

asked Oct 15 '15 at 8:57

Serge RoussakSerge Roussak

19188 bronze badges

asked Oct 15 '15 at 8:57

Serge RoussakSerge Roussak

19188 bronze badges

asked Oct 15 '15 at 8:57

Serge RoussakSerge Roussak

19188 bronze badges

4 Answers
4

active

oldest

votes

5

try nc

from man nc

nc — arbitrary TCP and UDP connections and listens

share|improve this answer

answered Oct 15 '15 at 9:02

ArchemarArchemar

21.3k99 gold badges4040 silver badges7676 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I know about it. But how can I to receive and send a raw (hex) data interactively? I.e. I need to start a server, then send some data to it (using nc or other soft), see what was received and send a (raw) answer back. May you give me an example please?
  
  – Serge Roussak
  Oct 15 '15 at 12:48
  

  
  
  
  

add a comment | 

2

socat is a sophisticated tool to connect, bidirectionally, almost anything to almost anything else. In particular, you can get it to listen on a port
for connections, run a program when connected, send the data to it, and
return output back to the socket. Eg:

socat TCP4-LISTEN:3344,reuseaddr,fork  EXEC:/tmp/runme,pty

will run a script /tmp/runme eg:

#!/bin/bash

trap 'echo sigterm >&2;exit' TERM

echo "start" >&2

while read line

do  echo "got $line"

done

in which you can do what you like with the data, such as here
returning it with the prefix "got ". You can test this with, eg, telnet localhost 3344 or

echo hi | socat - TCP4:localhost:3344

If you need to do the same with udp you can instead try, eg:

socat UDP-RECVFROM:3344,fork  EXEC:/tmp/runme,pty

you will only be passed one packet, but you still get any reply.
Test it with, eg:

echo hi | socat - UDP-SENDTO:localhost:3344

If all you want to do is get your data echoed back, this feature is built into xinetd, and you only need enable the echo service. See man xinetd.conf.

If you want to get bandwidth statistics, look at the netperf tool.

share|improve this answer

answered Oct 16 '15 at 17:44

meuhmeuh

33.7k11 gold badge2525 silver badges5959 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. It seems I wrote my question unclearly. I bypassed that I want to get a hex dump and to type a hex and send corresponding binary data back. So, I investigated the socat a little in a last days and it seems it is a good stuff for my issue, but it have not a hex i/o. So it needs an external tool/script to do this conversion. Maybe could you suggest it?
  
  – Serge Roussak
  Oct 16 '15 at 18:33
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You can pipe the raw data into xxd -p to get long lines of hex, and for the reverse pipe into xxd -r -p to convert hex lines into data.
  
  – meuh
  Oct 16 '15 at 18:39
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I know about it too, but it waits the eof so it is inconvenient for my task. I think there's need to write a little script or a program in C.
  
  – Serge Roussak
  Oct 16 '15 at 18:46
  
  
  

  
  
  
  

add a comment | 

0

You might be interested in sendip, its website: http://snad.ncsl.nist.gov/ipv6/sendip.html

From the site:

Q: How are string and numeric arguments handled? A: Many of the header fields, and the packet data area, can be specified via the following syntax:

• 0xXXXX - interpreted as a number in hex, converted to a binary number in network byte order.


• 0XXXX - interpreted as a number in octal, converted to a binary number in network byte order.


• rN - N "random" bytes


• zN - N nul (zero) bytes


• fF - read the argument from the next line in file F


• other - taken as a literal string

share|improve this answer

answered Oct 15 '15 at 19:08

phkphk

4,12955 gold badges2424 silver badges5757 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  May be, but as far as I understood sendip can not be a server.
  
  – Serge Roussak
  Oct 16 '15 at 6:34
  

  
  
  
  

add a comment | 

0

There is a patch for socat v.2.0.0.b8 which makes it possible.

share|improve this answer

edited 1 hour ago

Pang

17311 silver badge77 bronze badges

answered Oct 23 '15 at 9:17

Serge RoussakSerge Roussak

19188 bronze badges

add a comment | 

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5

try nc

from man nc

nc — arbitrary TCP and UDP connections and listens

share|improve this answer

answered Oct 15 '15 at 9:02

ArchemarArchemar

21.3k99 gold badges4040 silver badges7676 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I know about it. But how can I to receive and send a raw (hex) data interactively? I.e. I need to start a server, then send some data to it (using nc or other soft), see what was received and send a (raw) answer back. May you give me an example please?
  
  – Serge Roussak
  Oct 15 '15 at 12:48
  

  
  
  
  

add a comment | 

5

try nc

from man nc

nc — arbitrary TCP and UDP connections and listens

share|improve this answer

answered Oct 15 '15 at 9:02

ArchemarArchemar

21.3k99 gold badges4040 silver badges7676 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I know about it. But how can I to receive and send a raw (hex) data interactively? I.e. I need to start a server, then send some data to it (using nc or other soft), see what was received and send a (raw) answer back. May you give me an example please?
  
  – Serge Roussak
  Oct 15 '15 at 12:48
  

  
  
  
  

add a comment | 

try nc

from man nc

nc — arbitrary TCP and UDP connections and listens

share|improve this answer

answered Oct 15 '15 at 9:02

ArchemarArchemar

21.3k99 gold badges4040 silver badges7676 bronze badges

share|improve this answer

answered Oct 15 '15 at 9:02

ArchemarArchemar

21.3k99 gold badges4040 silver badges7676 bronze badges

answered Oct 15 '15 at 9:02

ArchemarArchemar

21.3k99 gold badges4040 silver badges7676 bronze badges

answered Oct 15 '15 at 9:02

ArchemarArchemar

21.3k99 gold badges4040 silver badges7676 bronze badges

2

socat is a sophisticated tool to connect, bidirectionally, almost anything to almost anything else. In particular, you can get it to listen on a port
for connections, run a program when connected, send the data to it, and
return output back to the socket. Eg:

socat TCP4-LISTEN:3344,reuseaddr,fork  EXEC:/tmp/runme,pty

will run a script /tmp/runme eg:

#!/bin/bash

trap 'echo sigterm >&2;exit' TERM

echo "start" >&2

while read line

do  echo "got $line"

done

in which you can do what you like with the data, such as here
returning it with the prefix "got ". You can test this with, eg, telnet localhost 3344 or

echo hi | socat - TCP4:localhost:3344

If you need to do the same with udp you can instead try, eg:

socat UDP-RECVFROM:3344,fork  EXEC:/tmp/runme,pty

you will only be passed one packet, but you still get any reply.
Test it with, eg:

echo hi | socat - UDP-SENDTO:localhost:3344

If all you want to do is get your data echoed back, this feature is built into xinetd, and you only need enable the echo service. See man xinetd.conf.

If you want to get bandwidth statistics, look at the netperf tool.

share|improve this answer

answered Oct 16 '15 at 17:44

meuhmeuh

33.7k11 gold badge2525 silver badges5959 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. It seems I wrote my question unclearly. I bypassed that I want to get a hex dump and to type a hex and send corresponding binary data back. So, I investigated the socat a little in a last days and it seems it is a good stuff for my issue, but it have not a hex i/o. So it needs an external tool/script to do this conversion. Maybe could you suggest it?
  
  – Serge Roussak
  Oct 16 '15 at 18:33
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You can pipe the raw data into xxd -p to get long lines of hex, and for the reverse pipe into xxd -r -p to convert hex lines into data.
  
  – meuh
  Oct 16 '15 at 18:39
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I know about it too, but it waits the eof so it is inconvenient for my task. I think there's need to write a little script or a program in C.
  
  – Serge Roussak
  Oct 16 '15 at 18:46
  
  
  

  
  
  
  

add a comment | 

2

socat is a sophisticated tool to connect, bidirectionally, almost anything to almost anything else. In particular, you can get it to listen on a port
for connections, run a program when connected, send the data to it, and
return output back to the socket. Eg:

socat TCP4-LISTEN:3344,reuseaddr,fork  EXEC:/tmp/runme,pty

will run a script /tmp/runme eg:

#!/bin/bash

trap 'echo sigterm >&2;exit' TERM

echo "start" >&2

while read line

do  echo "got $line"

done

in which you can do what you like with the data, such as here
returning it with the prefix "got ". You can test this with, eg, telnet localhost 3344 or

echo hi | socat - TCP4:localhost:3344

If you need to do the same with udp you can instead try, eg:

socat UDP-RECVFROM:3344,fork  EXEC:/tmp/runme,pty

you will only be passed one packet, but you still get any reply.
Test it with, eg:

echo hi | socat - UDP-SENDTO:localhost:3344

If all you want to do is get your data echoed back, this feature is built into xinetd, and you only need enable the echo service. See man xinetd.conf.

If you want to get bandwidth statistics, look at the netperf tool.

share|improve this answer

answered Oct 16 '15 at 17:44

meuhmeuh

33.7k11 gold badge2525 silver badges5959 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. It seems I wrote my question unclearly. I bypassed that I want to get a hex dump and to type a hex and send corresponding binary data back. So, I investigated the socat a little in a last days and it seems it is a good stuff for my issue, but it have not a hex i/o. So it needs an external tool/script to do this conversion. Maybe could you suggest it?
  
  – Serge Roussak
  Oct 16 '15 at 18:33
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You can pipe the raw data into xxd -p to get long lines of hex, and for the reverse pipe into xxd -r -p to convert hex lines into data.
  
  – meuh
  Oct 16 '15 at 18:39
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I know about it too, but it waits the eof so it is inconvenient for my task. I think there's need to write a little script or a program in C.
  
  – Serge Roussak
  Oct 16 '15 at 18:46
  
  
  

  
  
  
  

add a comment | 

socat is a sophisticated tool to connect, bidirectionally, almost anything to almost anything else. In particular, you can get it to listen on a port
for connections, run a program when connected, send the data to it, and
return output back to the socket. Eg:

socat TCP4-LISTEN:3344,reuseaddr,fork  EXEC:/tmp/runme,pty

will run a script /tmp/runme eg:

#!/bin/bash

trap 'echo sigterm >&2;exit' TERM

echo "start" >&2

while read line

do  echo "got $line"

done

in which you can do what you like with the data, such as here
returning it with the prefix "got ". You can test this with, eg, telnet localhost 3344 or

echo hi | socat - TCP4:localhost:3344

If you need to do the same with udp you can instead try, eg:

socat UDP-RECVFROM:3344,fork  EXEC:/tmp/runme,pty

you will only be passed one packet, but you still get any reply.
Test it with, eg:

echo hi | socat - UDP-SENDTO:localhost:3344

If all you want to do is get your data echoed back, this feature is built into xinetd, and you only need enable the echo service. See man xinetd.conf.

If you want to get bandwidth statistics, look at the netperf tool.

share|improve this answer

answered Oct 16 '15 at 17:44

meuhmeuh

33.7k11 gold badge2525 silver badges5959 bronze badges

socat TCP4-LISTEN:3344,reuseaddr,fork  EXEC:/tmp/runme,pty

#!/bin/bash

trap 'echo sigterm >&2;exit' TERM

echo "start" >&2

while read line

do  echo "got $line"

done

echo hi | socat - TCP4:localhost:3344

socat UDP-RECVFROM:3344,fork  EXEC:/tmp/runme,pty

echo hi | socat - UDP-SENDTO:localhost:3344

share|improve this answer

answered Oct 16 '15 at 17:44

meuhmeuh

33.7k11 gold badge2525 silver badges5959 bronze badges

answered Oct 16 '15 at 17:44

meuhmeuh

33.7k11 gold badge2525 silver badges5959 bronze badges

answered Oct 16 '15 at 17:44

meuhmeuh

33.7k11 gold badge2525 silver badges5959 bronze badges

0

You might be interested in sendip, its website: http://snad.ncsl.nist.gov/ipv6/sendip.html

From the site:

Q: How are string and numeric arguments handled? A: Many of the header fields, and the packet data area, can be specified via the following syntax:

• 0xXXXX - interpreted as a number in hex, converted to a binary number in network byte order.


• 0XXXX - interpreted as a number in octal, converted to a binary number in network byte order.


• rN - N "random" bytes


• zN - N nul (zero) bytes


• fF - read the argument from the next line in file F


• other - taken as a literal string

share|improve this answer

answered Oct 15 '15 at 19:08

phkphk

4,12955 gold badges2424 silver badges5757 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  May be, but as far as I understood sendip can not be a server.
  
  – Serge Roussak
  Oct 16 '15 at 6:34
  

  
  
  
  

add a comment | 

0

You might be interested in sendip, its website: http://snad.ncsl.nist.gov/ipv6/sendip.html

From the site:

Q: How are string and numeric arguments handled? A: Many of the header fields, and the packet data area, can be specified via the following syntax:

• 0xXXXX - interpreted as a number in hex, converted to a binary number in network byte order.


• 0XXXX - interpreted as a number in octal, converted to a binary number in network byte order.


• rN - N "random" bytes


• zN - N nul (zero) bytes


• fF - read the argument from the next line in file F


• other - taken as a literal string

share|improve this answer

answered Oct 15 '15 at 19:08

phkphk

4,12955 gold badges2424 silver badges5757 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  May be, but as far as I understood sendip can not be a server.
  
  – Serge Roussak
  Oct 16 '15 at 6:34
  

  
  
  
  

add a comment | 

You might be interested in sendip, its website: http://snad.ncsl.nist.gov/ipv6/sendip.html

From the site:

Q: How are string and numeric arguments handled? A: Many of the header fields, and the packet data area, can be specified via the following syntax:

• 0xXXXX - interpreted as a number in hex, converted to a binary number in network byte order.


• 0XXXX - interpreted as a number in octal, converted to a binary number in network byte order.


• rN - N "random" bytes


• zN - N nul (zero) bytes


• fF - read the argument from the next line in file F


• other - taken as a literal string

share|improve this answer

answered Oct 15 '15 at 19:08

phkphk

4,12955 gold badges2424 silver badges5757 bronze badges

share|improve this answer

answered Oct 15 '15 at 19:08

phkphk

4,12955 gold badges2424 silver badges5757 bronze badges

answered Oct 15 '15 at 19:08

phkphk

4,12955 gold badges2424 silver badges5757 bronze badges

answered Oct 15 '15 at 19:08

phkphk

4,12955 gold badges2424 silver badges5757 bronze badges

0

There is a patch for socat v.2.0.0.b8 which makes it possible.

share|improve this answer

edited 1 hour ago

Pang

17311 silver badge77 bronze badges

answered Oct 23 '15 at 9:17

Serge RoussakSerge Roussak

19188 bronze badges

add a comment | 

0

There is a patch for socat v.2.0.0.b8 which makes it possible.

share|improve this answer

edited 1 hour ago

Pang

17311 silver badge77 bronze badges

answered Oct 23 '15 at 9:17

Serge RoussakSerge Roussak

19188 bronze badges

add a comment | 

There is a patch for socat v.2.0.0.b8 which makes it possible.

share|improve this answer

edited 1 hour ago

Pang

17311 silver badge77 bronze badges

answered Oct 23 '15 at 9:17

Serge RoussakSerge Roussak

19188 bronze badges

share|improve this answer

edited 1 hour ago

Pang

17311 silver badge77 bronze badges

answered Oct 23 '15 at 9:17

Serge RoussakSerge Roussak

19188 bronze badges

edited 1 hour ago

Pang

17311 silver badge77 bronze badges

edited 1 hour ago

Pang

17311 silver badge77 bronze badges

answered Oct 23 '15 at 9:17

Serge RoussakSerge Roussak

19188 bronze badges

answered Oct 23 '15 at 9:17

Serge RoussakSerge Roussak

19188 bronze badges