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https://github.com/moparisthebest/socat
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new examples for dumping, usleep, http echo server
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16
EXAMPLES
16
EXAMPLES
@ -37,6 +37,16 @@ $ socat -,raw,echo=0 tcp:172.16.181.130:2023
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// replace /bin/login by /bin/bash when using SSL client authentication, can be
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// run without root then
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// this is a cool trick, proposed by Christophe Lohr, to dump communications to
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// two files; it would also work for other manipulations (recode, compress...)
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// and it might also work with netcat ;-)
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$ socat TCP-LISTEN:5555 SYSTEM:'tee l2r | socat - "TCP:remote:5555" | tee r2l'
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///////////////////////////////////////////////////////////////////////////////
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// emergence solution because usleep(1) is not always available
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// this will "sleep" for 0.1s
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$ socat -T 0.1 pipe pipe
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///////////////////////////////////////////////////////////////////////////////
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// a very primitive HTTP/1.0 echo server (problems: sends reply headers before
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// request; hangs if client does not shutdown - HTTP keep-alive)
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@ -45,6 +55,11 @@ $ socat -,raw,echo=0 tcp:172.16.181.130:2023
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// incoming data back to client
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$ socat TCP-LISTEN:8000,crlf SYSTEM:"echo HTTP/1.0 200; echo Content-Type\: text/plain; echo; cat"
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// a less primitive HTTP echo server that sends back not only the reqest but
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// also server and client address and port. Might have portability issues with
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// echo
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./socat -T 1 -d -d tcp-l:10081,reuseaddr,fork,crlf system:"echo -e \"\\\"HTTP/1.0 200 OK\\\nDocumentType: text/html\\\n\\\n<html>date: \$\(date\)<br>server:\$SOCAT_SOCKADDR:\$SOCAT_SOCKPORT<br>client: \$SOCAT_PEERADDR:\$SOCAT_PEERPORT\\\n<pre>\\\"\"; cat; echo -e \"\\\"\\\n</pre></html>\\\"\""
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///////////////////////////////////////////////////////////////////////////////
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// for communicating with an attached modem, I had reasonable results with
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// following command line. Required privileges depend on device mode.
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@ -292,6 +307,7 @@ $ socat -d -d -d -d - udp-datagram:224.0.0.2:6666,bind=:6666,ip-add-membership=2
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// on my Linux system I find in /usr/include/linux/cdrom.h the define:
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// #define CDROMEJECT 0x5309 /* Ejects the cdrom media */
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// the following command makes something like ioctl(fd, CDROMEJECT, NULL)
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// (don't care about the read error):
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$ socat /dev/cdrom,o-nonblock,ioctl-void=0x5309 -
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// setsockopt(): SO_REUSEADDR
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