build

#!/bin/bash

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
LOGFILE="${DIR}/build.log"
CC="gcc"
LDFLAGS="-lnet -lpcap"
CFLAGS="-g -O2 -D_BSD_SOURCE -DHAVE_SOCKADDR_SA_LEN -DLIBNET_BSDISH_OS\
  -DLIBNET_BSD_BYTE_SWAP"
LIBPCAP="/usr/local/opt/libpcap"
LIBNET="/usr/local/opt/libnet"
SRCS="arpspoof.c arp.c"
BIN_PREFIX=

copy(){
  agree=""

  # Print copy information
  cat <<'COPY'

macOS build script for arpspoof of dsniff

Copyright (c) 2017 Marcus Zhou <other.marcus@icloud.com>

  Binaries compiled by this script should be used under the restrictions
  of local laws. The author of this script will not take any
  responsibilities on the consequences caused by the end users nor any
  other redistributors.

arpspoof

Redirect packets from a target host (or from all hosts) intended for
another host on the LAN to ourselves.

Copyright (c) 1999, 2000 Dug Song <dugsong@monkey.org>
All rights reserved, all wrongs reversed.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:

  1. Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
  3. The name of author may not be used to endorse or promote products
     derived from this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

COPY

  printf "[*] I agree to the terms and conditions: (yes/no) "

  read agree
  if [ ! "$agree" == "yes" ] && [ ! "$agree" == "y" ]; then
    echo "[!] You must agree to continue using this script"
    exit 1
  fi
}

b_log(){
  echo "$(date) $1" >> $LOGFILE
}

log(){
  if [ ! -z "$2" ]; then
    echo "[$2] $1"
  else
    echo "[*] $1"
  fi
  b_log $1
}

usage(){
  cat <<USAGE

macOS build script for arpspoof of dsniff

Copyright (c) 2017 Marcus Zhou <other.marcus@icloud.com>

  Binaries compiled by this script should be used under the restrictions
  of local laws. The author of this script will not take any
  responsibilities on the consequences caused by the end users nor any
  other redistributors.

Usage: $0 <build|help|install|uninstall>

  build [cc]          Compile all the sources with gcc or given [cc], the
                      script will try to install all the dependencies using
                      Homebrew
  help                Print available options
  install [place]     Install the compiled binaries to /usr/local/bin or
                      the given [place] directory
  uninstall           Uninstall the compiled binaries

USAGE
}

build_deps(){
  hb_cli=$(which brew)
  if [ -z "$hb_cli" ]; then
    log "Unable to locate Homebrew" "!"
    log "The script is using Homebrew to install all the dependencies"
    log "Please follow the instruction on http://brew.sh to install Homebrew"
    exit 1
  fi
  log "Updating Homebrew..."
  "$hb_cli" "update" >> $LOGFILE 2>&1 0>&1
  log "Searching for dependencies..."
  if [ ! -d "$LIBPCAP" ]; then
    log "Installing libpcap..."
    "$hb_cli" "install" "homebrew/dupes/libpcap" >> $LOGFILE 2>&1 0>&1
    if [ $? -ne 0 ] || [ ! -d "$LIBPCAP" ]; then
      log "Unable to install libpcap, check the $LOGFILE for more information"
      exit 1
    fi
  fi
  if [ ! -d "$LIBNET" ]; then
    log "Installing libnet..."
    "$hb_cli" "install" "libnet" >> $LOGFILE 2>&1 0>&1
    if [ $? -ne 0 ] || [ ! -d "$LIBNET" ]; then
      log "Unable to install libnet, check the $LOGFILE for more information"
      exit 1
    fi
  fi
}

compile(){
  log "Compiling..."

  b_log "Using CC: ${CC}"
  b_log "CFLAGS: ${CFLAGS}"
  b_log "LDFLAGS: ${LDFLAGS}"
  b_log "LIBPCAP: ${LIBPCAP}"
  b_log "LIBNET: ${LIBNET}"
  b_log "Source Files: ${SRCS}"

  ${CC} ${CFLAGS} "-I${LIBPCAP}/include" "-I${LIBNET}/include" ${SRCS} \
    "-L${LIBPCAP}/lib" "-L${LIBNET}/lib" ${LDFLAGS} -o arpspoof >> $LOGFILE \
    2>&1 0>&1
  res=$?

  log "Cleaning up..."
  rm -rf *dSYM

  if [ $res -eq 0 ]; then
    log "Succeed, now run '$0 install' to install the compiled executables"
  else
    log "Compile unsuccessful. Compiler returns: $res" "!"
    exit 1
  fi
}

install(){
  cat <<'COPY'

macOS build script for arpspoof of dsniff

Copyright (c) 2017 Marcus Zhou <other.marcus@icloud.com>

  Binaries compiled by this script should be used under the restrictions
  of local laws. The redistributor of the sources under this directory
  will not take any responsibilities on the consequences caused by the end
  users nor any other redistributors.

By running this script, you agree to the terms and conditions stated.

COPY
  log "Installing..."
  if [ ! -z "$BIN_PREFIX" ]; then
    log "Installing to $BIN_PREFIX..."
    cp arpspoof "$BIN_PREFIX/arpspoof" >> $LOGFILE 2>&1 0>&1
    if [ $? -eq 0 ]; then
      echo "$BIN_PREFIX/arpspoof" >> "${DIR}/installed"
      log "Succeed"
    else
      log "Unable to install, check '$LOGFILE' for more information" "!"
    fi
  else
    cp arpspoof.8 /usr/local/share/man/man8 >> $LOGFILE 2>&1 0>&1 && \
    cp arpspoof /usr/local/bin >> $LOGFILE 2>&1 0>&1
    if [ $? -eq 0 ]; then
      log "Succeed"
    else
      log "Unable to install, check '$LOGFILE' for more information" "!"
    fi
  fi
}

uninstall(){
  cat <<'COPY'

macOS build script for arpspoof of dsniff

Copyright (c) 2017 Marcus Zhou <other.marcus@icloud.com>

  Binaries compiled by this script should be used under the restrictions
  of local laws. The redistributor of the sources under this directory
  will not take any responsibilities on the consequences caused by the end
  users nor any other redistributors.

By running this script, you agree to the terms and conditions stated.

COPY

  log "Uninstalling..."

  if [ -f "${DIR}/installed" ]; then
    INSTALLED_PLACES=( $(cat "${DIR}/installed") )
    echo > "${DIR}/installed"
    for f in "${INSTALLED_PLACES[@]}"; do
      log "Uninstalling $f"
      rm -f "$f"  >> $LOGFILE 2>&1 0>&1
      if [ $? -ne 0 ]; then
        log "Unable to remove '$f', check '$LOGFILE' for more information" "!"
        echo $f >> "${DIR}/installed"
      fi
    done
  fi

  rm -f /usr/local/share/man/man8/arpspoof.8 >> $LOGFILE 2>&1 0>&1 && \
  rm -f /usr/local/bin/arpspoof >> $LOGFILE 2>&1 0>&1

  if [ $? -eq 0 ]; then
    log "Succeed"
  else
    log "Unable to uninstall, check '$LOGFILE' for more information" "!"
  fi
}

case $1 in
  build)
    if [ ! -z "$2" ]; then
      CC="$2"
    fi
    copy
    build_deps
    compile
  ;;
  install)
    if [ ! -z "$2" ]; then
      BIN_PREFIX="$2"
    fi
    install
  ;;
  uninstall)
    uninstall
  ;;
  help)
    usage
  ;;
  *)
    usage
  ;;
esac