#!/bin/sh

# Copyright (C)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.

# Define a function to wait for a file or device node to be created

WaitForFile()
{
  while [ ! $1 $2 ]
  do
    #echo "Wait for $2"
    usleep 100000
  done
}

. /etc/platform

if [ "$SUBSYSTEM" != "net" ]; then
  exit 0
fi

# Add a network interface

if [ "${ACTION}" = "add" ]; then

  # Run ifplugd

  if [ "${INTERFACE}" != "lo" -a ! -f /var/run/ifplugd.${INTERFACE}.pid ]; then
    ifplugd -i ${INTERFACE} -I -r /usr/libexec/ifplugd.script
    WaitForFile -f /var/run/ifplugd.${INTERFACE}.pid
  fi

  # Run wpa_supplicant

  echo "${INTERFACE}" | grep -q -i wlan

  if [ $? -eq 0 -a -f /etc/wpa_supplicant.conf -a ! -f /var/run/wpa_supplicant.${INTERFACE}.pid ]; then
    wpa_supplicant -B -q -s -Dnl80211,wext -i ${INTERFACE} -c /etc/wpa_supplicant.conf -P /var/run/wpa_supplicant.${INTERFACE}.pid
    WaitForFile -f /var/run/wpa_supplicant.${INTERFACE}.pid
  fi
fi

# Remove a network interface

if [ "${ACTION}" = "remove" ]; then

  # Kill wpa_supplicant

  if [ -f /var/run/wpa_supplicant.${INTERFACE}.pid ]; then
    kill `cat /var/run/wpa_supplicant.${INTERFACE}.pid`
    rm -f /var/run/wpa_supplicant.${INTERFACE}.pid
  fi

  # Kill ifplugd

  if [ -f /var/run/ifplugd.${INTERFACE}.pid ]; then
    kill `cat /var/run/ifplugd.${INTERFACE}.pid`
    rm -f /var/run/ifplugd.${INTERFACE}.pid
  fi
fi