aredn/files/usr/local/bin/wifi-setup

#!/bin/sh
<<'LICENSE'
  Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
  Copyright (C) 2018 Joe Ayers  ae6xe@arrl.net
   See Contributors file for additional contributors

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation version 3 of the License.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.

  Additional Terms:

  Additional use restrictions exist on the AREDN(TM) trademark and logo.
    See AREDNLicense.txt for more info.

  Attributions to the AREDN Project must be retained in the source code.
  If importing this code into a new or existing project attribution
  to the AREDN project must be added to the source code.

  You must not misrepresent the origin of the material contained within.

  Modified versions must be modified to attribute to the original source
  and be marked in reasonable ways as differentiate it from the original
  version.

LICENSE

# This script reads the AREDN related wireless config options and generates
# a wireless UCI config file

# $1 is directory to create the wireless config

dropdir=${1-/etc/config}

# get aredn wifi related parameters
configfile=/etc/config.mesh/_setup
while read -r line; do
  if [ -n "$line" -a -z "${line##wifi*}" ]; then
    eval ${line%% =*}="\"${line##*= }"\" 
  fi
done < $configfile

# get mesh RF dev master setting in /etc/config/network

meshif="$(uci -q get network.wifi.ifname)"
meshphy="phy${meshif#wlan}"

rm -f "${dropdir}/wireless" 
touch "${dropdir}/wireless"

ifacenum=0

# find each phy and configure in wirelss config 
for _dev in /sys/class/ieee80211/*; do
  [ -e "$_dev" ] || continue

  dev="${_dev##*/}"
  radio="radio${dev#phy}"

  if [ -x /usr/bin/readlink -a -h "/sys/class/ieee80211/${dev}" ]; then
    devpath="$(readlink -n -f /sys/class/ieee80211/${dev})"
  else
    devpath=""
  fi
  if [ -n "${devpath}" ]; then
    devpath="${devpath##/sys/devices/}"
    devpath="${devpath%%/ieee802*}"
    case "${devpath}" in
      platform*/pci*) devpath="${devpath##platform/}";;
    esac
    dev_id="set wireless.${radio}.path=${devpath}"
  else
    dev_id="set wireless.${radio}.macaddr=$(cat /sys/class/ieee80211/${dev}/macaddress)"
  fi

  if [ $wifi2_enable -eq 1 ]; then
    wifi2_disabled="0"
  else
    wifi2_disabled="1"
  fi

  is_mesh_rf=0
  hwmode="11g"
  htmode="HT20"

  iw phy "${dev}" info | grep -q '5180 MHz' && {
    hwmode="11a"
  }

  if [ "${dev}" = "${meshphy}" ]; then
    # mesh RF adhoc configuration
    is_mesh_rf=1
    disabled="0"
    channel="${wifi_channel}"
    chanbw="${wifi_chanbw}"
    country="HX"
    distance="${wifi_distance}"
    ssid="${wifi_ssid}-${chanbw}-v3"
    mode="adhoc"
    encryption="none"
    key=""
    network="wifi"
  else
    # mesh AP bridged with lan
    disabled="${wifi2_disabled}"
    channel="${wifi2_channel}"
    chanbw=""
    country=""
    distance=""
    ssid=$(echo "${wifi2_ssid}" | sed -e 's/\(..\)/\\x\1/g')
    ssid=$(echo -e "${ssid}")
    ssid=${ssid//\"/\\\"}
    mode="ap"
    encryption="${wifi2_encryption}"
    key=$(echo "${wifi2_key}" | sed -e 's/\(..\)/\\x\1/g')
    key=$(echo -e "${key}")
    key=${key//\"/\\\"}
    network="lan"
  fi

  uci -c ${dropdir} -q batch > /dev/null <<-EOF
    set wireless.${radio}=wifi-device
    set wireless.${radio}.type=mac80211
    set wireless.${radio}.disabled=${disabled}
    set wireless.${radio}.channel=${channel}
    set wireless.${radio}.chanbw=${chanbw}
    set wireless.${radio}.country=${country}
    set wireless.${radio}.distance=${distance}
    set wireless.${radio}.hwmode=${hwmode}
    set wireless.${radio}.htmode=${htmode}
    ${dev_id}
    add wireless wifi-iface
    set wireless.@wifi-iface[${ifacenum}].device=${radio}         
    set wireless.@wifi-iface[${ifacenum}].network=${network}      
    set wireless.@wifi-iface[${ifacenum}].mode=${mode}            
    set wireless.@wifi-iface[${ifacenum}].ssid="${ssid}"               
    set wireless.@wifi-iface[${ifacenum}].encryption=${encryption}       
    set wireless.@wifi-iface[${ifacenum}].key="${key}"
EOF
  uci -c ${dropdir} -q commit wireless

  if [ ${is_mesh_rf} -eq 1 ]; then
    # add monitor interface on mesh rf
    ifacenum=$((ifacenum + 1))
    uci -c ${dropdir} -q batch > /dev/null <<-EOF
      add wireless wifi-iface
      set wireless.@wifi-iface[${ifacenum}].device=${radio}
      set wireless.@wifi-iface[${ifacenum}].network=wifi_mon
      set wireless.@wifi-iface[${ifacenum}].mode=monitor
EOF
    uci -q -c ${dropdir} commit wireless
  fi

  ifacenum=$((ifacenum + 1))

done