#!/bin/sh

:<<'########################################################################'

  Usage: make_redsocks.sh
    
This script downloads and constructs the redsocks extension.

------------------------------------------------------------------------

Change-log: 
  2011-10-10 First version.

------------------------------------------------------------------------

This script was written in 2011 by vitex from forum.tinycorelinux.net.

To the extent possible under law, the author(s) have dedicated all
copyright and related and neighboring rights to this software to the
public domain worldwide. This software is distributed without any
warranty.

See http://creativecommons.org/publicdomain/zero/1.0/ for a copy 
of the CC0 Public Domain Dedication under which this work is 
distributed.

########################################################################

# Specify the name of the extension.
EXTENSION=redsocks

# Specify the base portion of the extension.
EXTENSION0=redsocks

#-----------------------------------------------------------------------

# Install the extensions needed to build this extension.
tce-load -wi compiletc.tcz wget.tcz groff.tcz libevent.tcz libevent-dev.tcz

#-----------------------------------------------------------------------

# Specify the temporary directory that will contain the build components.
TMP=/tmp/tcz

# Specify the directory in which the squashfs files will be assembled.
SQUASHFS=$TMP/squashfs 

# Specify the directory in which the submission package will be assembled.
PACKAGE=$TMP/package

#-----------------------------------------------------------------------

# Specify the location containing the software distribution.
#VERSION=TBD
DOWNLOAD=https://github.com/darkk/redsocks/tarball/master

#-----------------------------------------------------------------------

# Download if necessary.
tar tzf $TMP/$EXTENSION-master.tgz 1>/dev/null 2>&1 ||
  wget --no-check-certificate -O- $DOWNLOAD >$TMP/$EXTENSION-master.tgz

#-----------------------------------------------------------------------

# Compute the name of the directory into which the software will be unpacked.
DIRECTORY=$(tar tzf $TMP/$EXTENSION-master.tgz | head -1)
DIRECTORY=$TMP/${DIRECTORY%%/}
VERSION=${DIRECTORY##*$EXTENSION-}

#-----------------------------------------------------------------------

# Unpack the software.
rm -fR $DIRECTORY
tar xzf $TMP/$EXTENSION-master.tgz -C $TMP

#-----------------------------------------------------------------------

export CFLAGS="-march=i486 -mtune=i686 -Os -pipe"
export CXXFLAGS="-march=i486 -mtune=i686 -Os -pipe"
export LDFLAGS="-Wl,-O1"

#-----------------------------------------------------------------------

# Build the software.
{ cd $DIRECTORY ; make
  touch $TMP/TIMESTAMP
}

#-----------------------------------------------------------------------

# Copy the installed files (those newer than $TMP/TIMESTAMP) from 
# /usr/local to $SQUASHFS/usr/local. 
( cd / 
  find usr/local -not -type d -newer $TMP/TIMESTAMP |
    grep -v /man/ |
    cpio -pvd $SQUASHFS
)

#-----------------------------------------------------------------------

# Install the executable.
mkdir -p $SQUASHFS/usr/local/bin
cp $DIRECTORY/$EXTENSION $SQUASHFS/usr/local/bin

#-----------------------------------------------------------------------

# Install the README and example configuration file.
mkdir -p $SQUASHFS/usr/local/share/$EXTENSION
{ cd $SQUASHFS/usr/local/share/$EXTENSION
  for f in redsocks.conf.example README ; do
    cp $DIRECTORY/$f .
  done
}

#-----------------------------------------------------------------------

# Create $EXTENSION.tcz.dep.
echo libevent.tcz >$PACKAGE/$EXTENSION.tcz.dep

#-----------------------------------------------------------------------

# Create $EXTENSION.tcz.info.
cat >$PACKAGE/$EXTENSION.tcz.info <<EOF
Title:          $EXTENSION.tcz
Description:    Tool for system-wide SOCKS or HTTPS proxy.
Version:        $VERSION
Author:         Leonid Evdokimov, leon@darkk.net.ru
Original-site:  http://darkk.net.ru/redsocks
Source:         $DOWNLOAD at $(date '+%Y-%m-%d %H:%M:%S')
Copying-policy: Apache 2.0 License
Size:           SiZeK
Extension_by:   vitex
Comments:       From http://darkk.net.ru/redsocks:

                  This tool allows you to redirect any TCP connection
                  to SOCKS or HTTPS proxy using your firewall, so
                  redirection is system-wide.

                See the /usr/local/share/redsocks directory for a
                README and sample configuration file.

                See https://gist.github.com/1287517 or download
                http://gist.github.com/raw/1287517/via-ssh.sh for an
                example script that uses redsocks, OpenSSH, and
                iptables to redirect all TCP traffic temporarily to a
                server on which you have an account with ssh access.
                For example, executing

                  ./via-ssh.sh user@server:port

                at the command line will redirect all of your TCP
                traffic until you enter Control-C to terminate the
                redirection. 

                Please see the caution in the script about DNS queries.

Change-log:     2011/10/10 First version
Current:        2011/10/14 Upgraded redsocks; moved script to gist.github.com.
EOF

#-----------------------------------------------------------------------