OLD/wpa-dhcpcd.txt

   1 AUTHOR: Eloi Primaux eloi@bliscat.org
   2 DATE: 2006-02-19
   3 LICENSE: GNU Free Documentation License Version 2
   4 SYNOPSIS: Setting a wireless network with WPA and dhcpcd
   5 DESCRIPTION:
   6 This hint purpose a way to set wireless networks using wpa_supplicant and dhcpcd
   7
   8 ATTACHMENTS:
   9 no attachments yet
  10
  11 PREREQUISITES:
  12 A full LFS-6.1 and BLFS-6.1 system already configured with a standart lan network
  13 The chipset driver of your wireless card (ex: madwifi http://madwifi.org/wiki/)
  14 wireless tools available at http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html
  15 wpa_supplicant available at http://hostap.epitest.fi/wpa_supplicant/ (latest stable release)
  16 dhcpcd installed from the blfs book
  17
  18
  19 note you will also require and access point which use wpa encryption and dhcp service
  20
  21 HINT:
  22
  23 this hint is mainly based on what has already been done in the blfs book for the dhcpcd service
  24
  25 install chipset driver, wireless tools, and wpa_supplicant
  26 both of them have fully explanaited documentations to build them
  27 If you still in trouble, have a look to http://madwifi.org/wiki
  28
  29 Now you need to create 2 files,
  30 1)      /etc/sysconfig/network-devices/service/wpa-dhcpcd
  31 2)      /etc/sysconfig/network-devices/ifconfig.XX/wpa-dhcpcd
  32
  33 XX is  the name of your device, eth0,wlan0,ath0...
  34
  35 Here are those files
  36
  37 ####### 1) wpa-dhcpcd service script    ########
  38 #
  39 #  /etc/sysconfig/network-devices/service/wpa-dhcpcd
  40 #
  41 ####### start here ######
  42
  43 #!/bin/sh
  44 # Begin $network-devices/services/wpa-dhcpcd
  45
  46 # Based on dhcpcd script adapted for  wpa networks
  47 # Rewritten by Eloi Primaux  - eloi@bliscat.org
  48
  49
  50 . /etc/sysconfig/rc
  51 . $rc_functions
  52 . $IFCONFIG
  53
  54 DHCPCD_PIDFILE="/var/run/dhcpcd-$1.pid"
  55 DHCPCD_LEASEINFO="/var/lib/dhcpc/dhcpcd-$1.info"
  56 WPA_PIDFILE="/var/run/wpa_supplicant-$1.pid"
  57 #WPA_CONFIGFILE="/etc/sysconfig/network-devices/ifconfig.$1/wpa-dhcpcd"
  58 #. $WPA_CONFIGFILE
  59 WPA_SCRP="/etc/sysconfig/network-devices/wpa-script.$1"
  60 rm -f $WPA_SCRP
  61 case "$2" in
  62         up)
  63         RET=$?
  64         evaluate_retval
  65         echo "" # due to the pre ifconfig process
  66         # Start wpa_supplicant in the background
  67         wpa_supplicant -g/var/run/wpa_supplicant-$1-global -P$WPA_PIDFILE -B
  68         #We must check if our requested SSID is available...
  69         boot_mesg "Scanning for available Access Points..."
  70         iwlist ath0 scan | grep "ESSID"
  71         SSID_AVAILABLE=$(iwlist ath0 scan | grep "$WPA_SSID")
  72         if [ -n "$SSID_AVAILABLE" ]; then
  73                 boot_mesg  "The Access Point "$WPA_SSID" is  available, connecting"
  74                 echo_ok
  75                 # Add a new interface (no configuration file and
  76                 # enable control interface)
  77                 echo "wpa_cli -g/var/run/wpa_supplicant-$1-global interface_add $1 \"\" $WPA_DRIVER /var/run/wpa_supplicant" > $WPA_SCRP
  78                 # Configure a network using the newly added network interface:
  79                 echo "wpa_cli -i$1 add_network" >> $WPA_SCRP
  80                 echo "wpa_cli -i$1 set_network 0 ssid '\"$WPA_SSID\"'" >> $WPA_SCRP
  81                 echo "wpa_cli -i$1 set_network 0 key_mgmt WPA-PSK" >> $WPA_SCRP
  82                 echo "wpa_cli -i$1 set_network 0 psk '\"$WPA_PASS\"'" >> $WPA_SCRP
  83                 echo "wpa_cli -i$1 set_network 0 pairwise $WPA_PAIRWISE" >> $WPA_SCRP
  84                 echo "wpa_cli -i$1 set_network 0 group $WPA_GROUP" >> $WPA_SCRP
  85                 echo "wpa_cli -i$1 set_network 0 proto $WPA_PROTO" >> $WPA_SCRP
  86                 echo "wpa_cli -i$1 enable_network 0" >> $WPA_SCRP
  87                 #Now we run the little script created above
  88                 boot_mesg -n "Booting wpa_supplicant on the $1 interface..."
  89                 . $WPA_SCRP > /dev/null
  90                 RET=$?
  91                 evaluate_retval
  92                 #Now we overwrite the last script by one which request the wpa status
  93                 # When the network is ready it will answer "wpa_state=COMPLETED"
  94                 echo "wpa_cli -i$1 status | grep 'wpa_state' | sed 's,wpa_state=,,g'" > $WPA_SCRP
  95                 # we run a little loop to wait for wpa_supplicant being ready
  96                 boot_mesg "Please wait while the daemon is connecting to $WPA_SSID..."
  97                         RET=$(. $WPA_SCRP)
  98                         COUNTER=0 # to not loop undefinetly at boot time if the network is down...
  99                 while [ "$RET" != "COMPLETED" ]; do
 100                         if [ "$COUTER" = "$WPA_MAXCYCLE" ]; then
 101                         boot_mesg "The Access Point $WPA_SSID is available" ${WARNING}
 102                         boot_mesg "But the connecting time is over . This is" ${WARNING}
 103                         boot_mesg "Mostly due to a misconfigurated network." ${WARNING}
 104                         boot_mesg "Please check your configuration" ${WARNING}
 105                         echo_warning
 106                         exit 2
 107                 fi
 108                         sleep 5s
 109                         RET=$(. $WPA_SCRP)
 110                         echo -n "$RET..."
 111                 done
 112                 echo ""
 113                 echo_ok
 114
 115                 # At this point, the new network interface should start trying to associate
 116                 # with the WPA-PSK network using SSID.
 117
 118
 119                 boot_mesg  "Starting dhcpcd on the $1 interface..."
 120                 # Test to see if there is a stale pid file
 121                 if [ -f "$DHCPCD_PIDFILE" ]
 122                 then
 123                     ps `cat "$DHCPCD_PIDFILE"` | grep dhcpcd > /dev/null
 124                     if [ $? != 0 ]
 125                     then
 126                         rm -f $DHCPCD_PIDFILE > /dev/null
 127                     else
 128                         boot_mesg "dhcpcd already running!" ${WARNING}
 129                         echo_warning
 130                         exit 2
 131                     fi
 132                 fi
 133                 /sbin/dhcpcd $1 $DHCP_START
 134                 # Save the return value
 135                 RET="$?"
 136                 # Print the assigned settings if requested
 137                 if [ "$RET" = "0" -a "$PRINTIP" = "yes" ]; then
 138                         . /var/lib/dhcpc/dhcpcd-$1.info
 139                         if [ "$PRINTALL" = "yes" ]; then
 140                                 echo ""
 141                                 echo_ok
 142                                 boot_mesg "           DHCP Assigned Settings for $1:"
 143                                 boot_mesg_flush
 144                                 boot_mesg "           IP Address:      $IPADDR"
 145                                 boot_mesg_flush
 146                                 boot_mesg "           Subnet Mask:     $NETMASK"
 147                                 boot_mesg_flush
 148                                 boot_mesg "           Default Gateway: $GATEWAY"
 149                                 boot_mesg_flush
 150                                 boot_mesg "           DNS Server:      $DNS"
 151                                 boot_mesg_flush
 152                         else
 153                                 boot_mesg " IP Addresss: ""$IPADDR"
 154                                 echo_ok
 155                         fi
 156                 else
 157                         echo ""
 158                         $(exit "$RET")
 159                         evaluate_retval
 160                 fi
 161         else
 162                 boot_mesg "The Access Point "$WPA_SSID" is not available" ${WARNING}
 163                 boot_mesg "Please check your configuration" ${WARNING}
 164                         echo_warning
 165                         exit 2
 166         fi
 167
 168         ;;
 169
 170         down)
 171                 boot_mesg -n "Stopping dhcpcd on the $1 interface..."
 172                 # Do nothing with the client daemon if we have an infinate
 173                 # lease time as the client exits when started in this case,
 174                 # just echo OK.
 175                 if [ -e $DHCPCD_LEASEINFO ]
 176                 then
 177                     . $DHCPCD_LEASEINFO
 178
 179                     if [ "$DHCPCD_LEASETIME" = "4294967295" ]
 180                     then
 181                         # do nothing, just echo ok
 182                         echo ""
 183                         echo_ok
 184                     else
 185                         if [ -n "$DHCP_STOP" ]
 186                         then
 187                             /sbin/dhcpcd $1 $DHCP_STOP &> /dev/null
 188                             RET="$?"
 189                             if [ "$RET" -eq 0 ]; then
 190                                 echo ""
 191                                 echo_ok
 192                             elif [ "$RET" -eq 1 ]; then
 193                                 boot_mesg "dhcpcd not running!" ${WARNING}
 194                                 echo_warning
 195                             else
 196                                 echo ""
 197                                 echo_failure
 198                             fi
 199                         else
 200                             echo ""
 201                             killproc dhcpcd
 202                         fi
 203                     fi
 204                 else
 205                     boot_mesg -n "LEASEINFO Test failed! - " ${WARNING}
 206                     boot_mesg "dhcpcd is not running!" ${WARNING}
 207                     echo_warning
 208                     exit 1
 209                 fi
 210                 boot_mesg "Stopping wpa_supplicant on the $1 interface..."
 211                 killproc -p $WPA_PIDFILE wpa_supplicant
 212
 213
 214         ;;
 215
 216         *)
 217                 echo "Usage: $0 [interface] {up|down}"
 218                 exit 1
 219         ;;
 220 esac
 221
 222 # End $network_devices/services/wpa-dhcpcd
 223
 224
 225 #### end here####
 226
 227
 228
 229
 230 ####### 2) wpa-dhcpcd config file       ########
 231 #
 232 # /etc/sysconfig/network-devices/ifconfig.XX/wpa-dhcpcd
 233 # XX is  the name of your device, eth0,wlan0,ath0...
 234 #
 235 #### start here #####
 236
 237 #This config file is mostly based of the
 238 #dhcpcd config file
 239
 240 ONBOOT="yes"
 241 SERVICE="wpa-dhcpcd"
 242 DHCP_START="-d " # to print some debug informations
 243 DHCP_STOP="-k "
 244 WPA_SSID="Your SSID"
 245 WPA_DRIVER="Your Driver"
 246 WPA_PROTO="Your Proto" # WPA2 for WPA2-PSK check the wpa-supplicant readme
 247 WPA_PAIRWISE="Your Pairwise" # CCMP for AES
 248 WPA_GROUP="Your Group" # CCMP for AES
 249 WPA_PASS="Your very secret WPA password"
 250
 251 #one cycle each 5 seconds
 252 WPA_MAXCYCLE=24 # 120s
 253 # Set PRINTIP="yes" to have the script print
 254 # the DHCP assigned IP address
 255 PRINTIP="no"
 256
 257 # Set PRINTALL="yes" to print the DHCP assigned values for
 258 # IP, SM, DG, and 1st NS. This requires PRINTIP="yes".
 259 PRINTALL="yes"
 260
 261
 262 ### End Here #####
 263
 264
 265 do a chmod 755 /etc/sysconfig/network-devices/service/wpa-dhcpcd
 266 and if you correctly set the config file, just type
 267 /etc/rc.d/init.d/network restart if you can use the connection then
 268 your wireless network will be set at boot time
 269
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 271
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