#!/bin/sh

# MuntsOS Network Configurator

# Copyright (C)2017-2024, Philip Munts dba Munts Technologies.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
#   this list of conditions and the following disclaimer.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.

echo ""
echo "MuntsOS Network Configurator"
echo ""

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

function GetYesNo {
  printf "%-60s [y,N] " "$@"

  read resp
  resp=`echo $resp | tr '[:lower:]' '[:upper:]'`

  if [ "$resp" != "Y" ]; then
    return 1
  else
    return 0
  fi
}

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

function ConfigureGateway {
  printf "Enter default gateway IPv4 address: "
  read GATEWAY

  if [ -z "${GATEWAY}" ]; then
    return
  fi

  sed -i -r "s/#*gateway=.*/gateway=${GATEWAY}/g" /etc/network.conf
}

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

function ConfigureDomain {
  printf "Enter default domain: "
  read DOMAIN

  if [ -z "${DOMAIN}" ]; then
    return
  fi

  sed -i -r "s/#*domain=.*/domain=${DOMAIN}/g" /etc/network.conf
}

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

function ConfigureNameservers {
  printf "Enter domain name server IPv4 addresses (separated by spaces): "
  read NAMESERVERS

  if [ -z "${NAMESERVERS}" ]; then
    return
  fi

  sed -i -r "s/#*nameservers=.*/nameservers=\"${NAMESERVERS}\"/g" /etc/network.conf
}

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

function ConfigureAddress {
  printf "Enter IPv4 address for interface $1: "
  read ADDRESS

  if [ -z "${ADDRESS}" ]; then
    return
  fi

  sed -i -r "/#*${1}_address/d" /etc/network.conf

  echo "${1}_address=${ADDRESS}" >> /etc/network.conf
}

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

function ConfigureNetmask {
  printf "Enter IPv4 netmask for interface $1: "
  read NETMASK

  if [ -z "${NETMASK}" ]; then
    return
  fi

  sed -i -r "/#*${1}_netmask/d" /etc/network.conf

  echo "${1}_netmask=${NETMASK}" >> /etc/network.conf
}

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

# Iterate network interfaces

function ConfigureInterfaces {
  for I in /sys/class/net/* ; do
    if [ ! -L $I ]; then
      continue;
    fi

    if [ "$I" = "/sys/class/net/lo" ]; then
      continue;
    fi

    INTERFACE=`basename $I`

    if [ "`ethtool -i ${INTERFACE} 2>&1 | awk '/driver:/ { print $2 }'`" = "g_ether" -a $((OPTIONS & 0x800)) -eq 0 ]; then
      continue;
    fi

    ConfigureAddress ${INTERFACE}
    ConfigureNetmask ${INTERFACE}

    /usr/libexec/ifplugd.script ${INTERFACE} down
    sleep 1
    /usr/libexec/ifplugd.script ${INTERFACE} up
  done
}

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

# Main program

ConfigureGateway
ConfigureDomain
ConfigureNameservers
ConfigureInterfaces