From 3a060c1cf34246da0b4ca5113ee08c6b78890501 Mon Sep 17 00:00:00 2001 From: Gerhard Rieger Date: Wed, 15 Oct 2008 22:52:10 +0200 Subject: [PATCH] new examples for dumping, usleep, http echo server --- EXAMPLES | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/EXAMPLES b/EXAMPLES index 60ca020..eca34f3 100644 --- a/EXAMPLES +++ b/EXAMPLES @@ -37,6 +37,16 @@ $ socat -,raw,echo=0 tcp:172.16.181.130:2023 // replace /bin/login by /bin/bash when using SSL client authentication, can be // run without root then +// this is a cool trick, proposed by Christophe Lohr, to dump communications to +// two files; it would also work for other manipulations (recode, compress...) +// and it might also work with netcat ;-) +$ socat TCP-LISTEN:5555 SYSTEM:'tee l2r | socat - "TCP:remote:5555" | tee r2l' + +/////////////////////////////////////////////////////////////////////////////// +// emergence solution because usleep(1) is not always available +// this will "sleep" for 0.1s +$ socat -T 0.1 pipe pipe + /////////////////////////////////////////////////////////////////////////////// // a very primitive HTTP/1.0 echo server (problems: sends reply headers before // request; hangs if client does not shutdown - HTTP keep-alive) @@ -45,6 +55,11 @@ $ socat -,raw,echo=0 tcp:172.16.181.130:2023 // incoming data back to client $ socat TCP-LISTEN:8000,crlf SYSTEM:"echo HTTP/1.0 200; echo Content-Type\: text/plain; echo; cat" +// a less primitive HTTP echo server that sends back not only the reqest but +// also server and client address and port. Might have portability issues with +// echo +./socat -T 1 -d -d tcp-l:10081,reuseaddr,fork,crlf system:"echo -e \"\\\"HTTP/1.0 200 OK\\\nDocumentType: text/html\\\n\\\ndate: \$\(date\)
server:\$SOCAT_SOCKADDR:\$SOCAT_SOCKPORT
client: \$SOCAT_PEERADDR:\$SOCAT_PEERPORT\\\n
\\\"\"; cat; echo -e \"\\\"\\\n
\\\"\"" + /////////////////////////////////////////////////////////////////////////////// // for communicating with an attached modem, I had reasonable results with // following command line. Required privileges depend on device mode. @@ -292,6 +307,7 @@ $ socat -d -d -d -d - udp-datagram:224.0.0.2:6666,bind=:6666,ip-add-membership=2 // on my Linux system I find in /usr/include/linux/cdrom.h the define: // #define CDROMEJECT 0x5309 /* Ejects the cdrom media */ // the following command makes something like ioctl(fd, CDROMEJECT, NULL) +// (don't care about the read error): $ socat /dev/cdrom,o-nonblock,ioctl-void=0x5309 - // setsockopt(): SO_REUSEADDR