Ticket #2247: wpa-service

#!/bin/bash
# Begin $network-devices/services/wpa-service
# wpa-service 0.21
# Based on dhcpcd script adapted for wpa networks with or without dhcp support
# Rewritten by Eloi Primaux  - eloi AT bliscat DOT org
# 2006-02-20 First script
# 2006-03-31 wpa-service is functional
# 2006-08-21 version by Maarten Lankhorst - m.b.lankhorst.(@).gmail.com
# 2006-10-15 0.2 release by Eloi Primaux
#            merging Maarten work into configure_network function
#            can use both wpa_cli -a function and ifplugd.
# 2007-02-14 0.21 ifplugd support removed
#            wait_for_up removed
#            status* and available_network* functions removed

IFACE=$1
BRING=$2

. /etc/sysconfig/rc
. $rc_functions
. $IFCONFIG
. /etc/sysconfig/wpa_supplicant/wpa_service.conf

function get_real_pid {
        if [ -e $1 ]; then
        RET=`fuser $1` &> /dev/null
        else
        return 1
        fi
}

function wpa_is_up {
        get_real_pid $WPA_GLOBAL_FILE
        if [ $? != 0 ]; then
                return 2
        fi
}

function wpa {
        wpa_is_up
        if [ $? != 0 ]; then
                verbose '' "$WPA_DAEMON_NAME isn't running, please check why"
                if [ $BRING != "UP" ]; then
                        return 1
                else
                        exit 1
                fi
        fi
}

function is_iface_not_managed {
        [ -n "`get_real_pid $WPA_ACCESS_DIR/$IFACE`" ] && return 2
}

function verbose {
        [ "$VERBOSE" == "YES" ] && boot_mesg $1 "$2"
}

function test_fail {
        [ "$1" != 0 ] && RET="FAIL:$1"
        verbose '' " $RET"
        if [[ $RET = FAIL* ]]; then
                echo_failure ; return 2
        else
                return $1
        fi
}

function add_iface {
        verbose -n "$WPA_CLIENT_NAME -g$WPA_GLOBAL_FILE interface_add $IFACE '' $WPA_DRIVER $WPA_ACCESS_DIR :"
        RET=`$WPA_CLIENT_NAME -g$WPA_GLOBAL_FILE interface_add $IFACE '' $WPA_DRIVER $WPA_ACCESS_DIR` &> /dev/null
        test_fail $?
}

function ctrl_iface {
        verbose -n "$WPA_CLIENT_NAME -i$IFACE $@ :"
        RET=`$WPA_CLIENT_NAME -i$IFACE $@` &> /dev/null
        test_fail $?
}

function remove_iface {
        verbose -n "$WPA_CLIENT_NAME -g$WPA_GLOBAL_FILE interface_remove $IFACE :"
        RET=`$WPA_CLIENT_NAME -g$WPA_GLOBAL_FILE interface_remove $IFACE` &> /dev/null
        test_fail $?
}

function configure_network {
        #Read the wpa config file
        LINENUMBER=0
        CONFIGFILE="$WPA_CONFIG_DIR/$WPA_CONFIG_FILE"
        LINES="$(wc -l $CONFIGFILE | sed 's/ .*//')"
        while [ "$LINENUMBER" -lt "$LINES" ]
        do
                verbose '' "NETWORK=$NETWORK"
                # Increase line number
                let ++LINENUMBER
                verbose '' "Parsing line ${LINENUMBER}"
                # Fetch a line
                preline="$(head -n $LINENUMBER $CONFIGFILE | tail -n 1)"
                # Remove everything after a '#' (comment)
                line="$(echo $preline | sed -e 's/#.*//')"

                #echo "Parsing $LINENUMBER: '$preline' => '$line'"

                if [ -z "`echo $line`" ]; then
                # ignore now empty lines
                        continue
                elif [ "$line" = "network={" ]; then
                # creating a new network configuration,
                # saving network number to NETWORK
                        ctrl_iface add_network
                        NETWORK="$RET"
                elif [ "$line" = "}" ]; then
                # now the network is configured, enabling it
                        ctrl_iface "enable_network $NETWORK"
                        unset NETWORK
                elif [ -n "$( echo "$line" | grep -v "ctrl_interface")" ]; then
                        # all others lines should be network parameters...
                        # i need to replace the first '=' character by a pace
                        line="`echo "$line" | sed 's,=, ,'`"
                        verbose '' "ctrl_iface set_network $NETWORK $line"
                        RET="`$WPA_CLIENT_NAME -i $IFACE set_network $NETWORK $line`"
                        #ctrl_iface set_network $NETWORK $line
                fi
                if [[ $RET = FAIL* ]]; then
                        boot_mesg "Parse error on line ${LINENUMBER}"
                        remove_iface 
                        echo_failure
                        return 2
                fi
        done
}

function wait_for_events {
# This is a new wpa_supplicant function: really usefull
# but requires an additional action file to handle CONNECTED/DISCONNECTED events
        ctrl_iface -a$WPA_ACTION_FILE &
}


function real_fail {
        [ "$1" != 0 ] && RET="FAIL:$1"
        verbose '' " $RET"
        if [[ $RET = FAIL* ]]; then
                exit $1
        else
                return $1
        fi
}

function wait_for_up {
        wait_for_up_loop
        real_fail $?
        $WPA_ACTION_FILE $IFACE CONNECTED
}


function iface_up {
        wpa
        is_iface_not_managed
        if [ $? = 0 ]; then
                verbose '' "Interface already managed, continuing"
        else
                add_iface
                real_fail $?
        fi
        configure_network
        real_fail $?
        wait_for_events
        }


function iface_down {
        wpa
        ctrl_iface disconnect
        test_fail $?
                verbose '' "wpa_cli -a will exit when interface will be removed"
                $WPA_ACTION_FILE $IFACE DISCONNECTED
        test_fail $?
        wpa_cli -g$WPA_GLOBAL_FILE interface_remove $IFACE
        test_fail $?    
}

case "$2" in
        up)
        iface_up
        ;;
        down)
        iface_down
        ;;
esac