#!/bin/sh

# Check wifi-devices before loading ath_pci drivers
oldwifi=`ip link show | sed -n 's/.*\(wifi[0-9]\{1,\}\).*/\1/p'`

# Load Atheros driver
do_modprobe ath_pci autocreate=none $opt

# Check difference - the new devices are atheros
wifi=`ip link show | sed -n 's/.*\(wifi[0-9]\{1,\}\).*/\1/p'`

# delete all previous already known devices
for i in $oldwifi
do
    wifi=`echo $wifi | sed "s/$i//"`
done

# now we need to go thru the devices and extract MAC, parse the WLAN-Config 
# and create the VAP's accordingly.
[ "$wifi" ] || log_error "No ath_pci devices found."

for i in $wifi
do
    di=`grep 'wlan[0-9]\+:[ ]' /proc/net/dev | sed -n '/:/s/ *wlan\([0-9]\+\):.*/\1/p' | sort -nr | head -n 1`
    vapnum=0
    vapsta_wlan=''
    vapmaster_n='0'
    wifi="$i"
    stanum=0
    if [ -n "$WLAN_N" ]
    then
        if [ "$WLAN_N" -gt 0 ]
        then
            # Extract MAC-Address 
            mac=`ip link show $i | sed -n 'y/abcdef/ABCDEF/;s/.*\(\([0-9A-F]\{2\}:\)\{5\}[0-9A-F]\{2\}\).\+/\1/p'`
            # Run through WLAN-Config
            for idx in `seq 1 $WLAN_N`
            do
                eval wmac=\$WLAN_${idx}_MAC
		wmac=`echo $wmac | sed 'y/abcdef/ABCDEF/'`
                if [ "$wmac" = "$mac" ]
                then
		    # Extract diversity-settings from 1st matching MAC and set if wanted.
		    if [ $vapnum -eq 0 ]
		    then
			eval diversity=\$WLAN_${idx}_DIVERSITY
			case $diversity in
			    yes) sysctl -w dev.$i.diversity=1
				 eval diversity=\$WLAN_${idx}_DIVERSITY_TX
				 : ${diversity:=1}
				 sysctl -w dev.$i.txantenna=$diversity
				 eval diversity=\$WLAN_${idx}_DIVERSITY_RX
				 : ${diversity:=1}
				 sysctl -w dev.$i.rxantenna=$diversity
				 ;;
			      *) sysctl -w dev.$i.diversity=0 ;;
			esac
			unset diversity
		    fi
                    eval mode=\$WLAN_${idx}_MODE
                    # Convert mode and disable if more than one sta-mode for this WLAN-Card
                    case $mode in
                        ad-hoc)     mode=adhoc ;;
                        managed)
                            mode='sta nosbeacon'
                            stanum=`expr $stanum + 1`
                            if [ $stanum -gt 1 ]
                            then
                                mode=
				log_error "Warning: Only one MANAGED VAP on the same Card allowed: WLAN_${idx}"
                            fi
                        ;;
                        master)     mode=ap ;;
                        monitor)    mode=monitor ;;
                        *)          mode= ;;
                    esac
                    if [ -n "$mode" ]
                    then
                        vapnum=`expr $vapnum + 1`
                        # Maximum 4 VAP are possible
                        if [ $vapnum -le 4 ]
                        then
			    if [ -n "$di" ]
			    then
                              di=`expr $di \+ 1`
			    else
			      di=0
			    fi
			    # need to seperate because sta has to be the last vap created
			    case $mode in
				sta*)
			          vapsta_wlan="wlan$di"
				  vapsta_wlann="$idx"
			  	  ;;
			        *)
				  vapmaster_n=`expr $vapmaster_n + 1`
				  eval vapmaster_${vapmaster_n}_wlan="wlan$di"
				  eval vapmaster_${vapmaster_n}_mode="$mode"
				  eval vapmaster_${vapmaster_n}_wlann="$idx"
		                  ;;
		            esac		  
			else
			    log_error "Warning: Only 4 VAP on the same Card allowed: WLAN_${idx}"
                        fi
                    fi
                fi 
            done
            if [ $vapnum -eq 0 ]
            then
                di=`expr $di \+ 1`
                log_error "Warning: no wlan-config found for $i MAC: $mac"
                case $WLAN_1_MODE
                in
                    ad-hoc)     mode=adhoc ;;
                    managed)    mode=sta ;;
                    master)     mode=ap ;;
                    monitor)    mode=monitor ;;
                    *)          mode= ;;
                esac
                if [ -n "$mode" ]
                then
      		    log_info "Creating VAP No. 1 onto wlan$di/$i mode $mode, MAC-Address: $mac"
                    wlanconfig wlan$di create wlandev $i wlanmode $mode -bssid
                fi
	    else
		if [ -n "$vapsta_wlan" ]
		then
		  tv=`expr $vapmaster_n + 1`
		else
		  tv=''
		fi
                for vapnum in `seq 1 $vapmaster_n` $tv
		do
   		  # Calculate resulting MAC-Address of new WLAN-Device
  		  case $vapnum in
                      2) mf='06' ;;
                      3) mf='0A' ;;
                      4) mf='0E' ;;
                      *) mf='00' ;;
                  esac
                  wmac=`echo $mac | sed "s/..\(.*\)/$mf\1/"`
		  # sta or other?
		  if [ $vapnum -gt $vapmaster_n ]
		  then
	            wlan=$vapsta_wlan
		    mode='sta nosbeacon'
		    mod='sta'
		    wlann=$vapsta_wlann
		  else
		    eval wlan=\$vapmaster_${vapnum}_wlan
		    eval mode=\$vapmaster_${vapnum}_mode
		    eval mod="$mode"
		    eval wlann=\$vapmaster_${vapnum}_wlann
		  fi
                  log_info "Creating VAP $vapnum onto $wlan/$wifi mode $mod, MAC-Address: $wmac"
		  # Actually create the VAP
		  if [ $vapnum -eq 1 ]
		  then
		    extraoption='-bssid'
		  else
		    extraoption=''
		  fi
		  wlanconfig $wlan create wlandev $wifi wlanmode $mode $extraoption
                  # Patch WLAN-Configuration for WLAN-Scripts running later
                  eval WLAN_${wlann}_MAC=$wmac
		done
            fi
        fi
    fi
done
unset wifi
unset vapnum
unset stanum
unset mf
unset mode
unset di
unset mac
unset wmac
unset oldwifi