socat V1.6.0.0 (initial GIT commit)

2025-07-29 13:42:58 +00:00 · 2008-01-27 13:00:08 +01:00 · 2008-01-27 13:00:08 +01:00 · b819572f5e
commit b819572f5e
170 changed files with 59193 additions and 0 deletions
--- a/socks4a-echo.sh
+++ b/socks4a-echo.sh
@ -0,0 +1,114 @@
+#! /bin/bash
+# $Id: socks4a-echo.sh,v 1.2 2004/08/25 16:01:30 gerhard Exp $
+#set -vx
+
+# Copyright Gerhard Rieger 2004
+# Published under the GNU General Public License V.2, see file COPYING
+
+# perform primitive simulation of a socks4a server with echo function via stdio.
+# accepts and answers correct SOCKS4a requests, but then just echoes data.
+# it is required for test.sh
+# for TCP, use this script as:
+# socat tcp-l:1080,reuseaddr,crlf system:"socks4a-echo.sh"
+
+# older bash and ksh do not have -n option to read command; we try dd then
+if echo a |read -n 1 null >/dev/null 2>&1; then
+    HAVE_READ_N=1
+else
+    HAVE_READ_N=
+fi
+
+if type socat >/dev/null 2>&1; then
+    SOCAT=socat
+else
+    SOCAT=./socat
+fi
+
+case `uname` in
+HP-UX|OSF1)
+    CAT="$SOCAT -u stdin stdout"
+    ;;
+*)
+    CAT=cat
+    ;;
+esac
+
+if   [ $(echo "x\c") = "x" ]; then E=""
+elif [ $(echo -e "x\c") = "x" ]; then E="-e"
+else
+    echo "cannot suppress trailing newline on echo" >&2
+    exit 1
+fi
+ECHO="echo $E"
+
+if [ $($ECHO "\0101") = "A" ]; then
+    SOCKSREPLY_FAILED="\0\0133\0\0\0\0\0\0\c"
+    SOCKSREPLY_OK="\0\0132\0\0\0\0\0\0\c"
+else
+    SOCKSREPLY_FAILED="\0\133\0\0\0\0\0\0\c"
+    SOCKSREPLY_OK="\0\132\0\0\0\0\0\0\c"
+fi
+
+# read and parse SOCKS4a header
+if [ "$HAVE_READ_N" ]; then
+    read -r -n 1 vn	# bash 2.0.3 does not support -n
+else
+    vn=$(dd bs=1 count=1 2>/dev/null)
+fi
+if [ "$vn" != $($ECHO "\04") ]; then
+    $ECHO "$SOCKSREPLY_FAILED"
+    echo "invalid socks version requested" >&2
+    exit
+fi
+
+if [ "$HAVE_READ_N" ]; then
+    read -r -n 1 cd
+else
+    cd=$(dd bs=1 count=1 2>/dev/null)
+fi
+if [ "$cd" != $($ECHO "\01") ]; then
+    $ECHO "$SOCKSREPLY_FAILED"
+    echo "invalid socks operation requested" >&2
+    exit
+fi
+
+a=$(dd bs=1 count=6 2>/dev/null)
+#echo a a a >/dev/tty
+#echo "$a" |od -c >/dev/tty
+#$ECHO "$a" |od -c >/dev/tty
+#echo>/dev/tty
+#echo a a a >/dev/tty
+if [ "$a" != "$($ECHO "}m\0\0\0\01")" ]; then
+    sleep 1
+    $ECHO "$SOCKSREPLY_FAILED"
+    echo "wrong socks address or port requested" >&2
+    exit
+fi
+
+if [ "$HAVE_READ_N" ]; then
+    read -r -n 7 u
+else
+    u=$(dd bs=1 count=7 2>/dev/null)
+fi
+if [ "$u" != "nobody" ]; then
+    $ECHO "$SOCKSREPLY_FAILED"
+    echo "wrong socks user requested" >&2
+    exit
+fi
+
+if [ "$HAVE_READ_N" ]; then
+    read -r -n 10 h
+else
+    h=$(dd bs=1 count=10 2>/dev/null)
+fi
+if [ "$h" != "localhost" ]; then
+    $ECHO "$SOCKSREPLY_FAILED"
+    echo "wrong socks address requested" >&2
+    exit
+fi
+
+# send ok status
+$ECHO "$SOCKSREPLY_OK"
+
+# perform echo function
+$CAT