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Viewing changes to network-hooks.d/wireless

  • Committer: Teddy Hogeborn
  • Date: 2015-05-23 20:18:34 UTC
  • mto: This revision was merged to the branch mainline in revision 756.
  • Revision ID: teddy@recompile.se-20150523201834-e89ex4ito93yni8x
mandos: Use multiprocessing module to run checkers.

For a long time, the Mandos server has occasionally logged the message
"ERROR: Child process vanished".  This was never a fatal error, but it
has been annoying and slightly worrying, since a definite cause was
not found.  One potential cause could be the "multiprocessing" and
"subprocess" modules conflicting w.r.t. SIGCHLD.  To avoid this,
change the running of checkers from using subprocess.Popen
asynchronously to instead first create a multiprocessing.Process()
(which is asynchronous) calling a function, and have that function
then call subprocess.call() (which is synchronous).  In this way, the
only thing using any asynchronous subprocesses is the multiprocessing
module.

This makes it necessary to change one small thing in the D-Bus API,
since the subprocesses.call() function does not expose the raw wait(2)
status value.

DBUS-API (CheckerCompleted): Change the second value provided by this
                             D-Bus signal from the raw wait(2) status
                             to the actual terminating signal number.
mandos (subprocess_call_pipe): New function to be called by
                               multiprocessing.Process (starting a
                               separate process).
(Client.last_checker signal): New attribute for signal which
                              terminated last checker.  Like
                              last_checker_status, only not accessible
                              via D-Bus.
(Client.checker_callback): Take new "connection" argument and use it
                           to get returncode; set last_checker_signal.
                           Return False so gobject does not call this
                           callback again.
(Client.start_checker): Start checker using a multiprocessing.Process
                        instead of a subprocess.Popen.
(ClientDBus.checker_callback): Take new "connection" argument.        Call
                               Client.checker_callback early to have
                               it set last_checker_status and
                               last_checker_signal; use those.  Change
                               second value provided to D-Bus signal
                               CheckerCompleted to use
                               last_checker_signal if checker was
                               terminated by signal.
mandos-monitor: Update to reflect DBus API change.
(MandosClientWidget.checker_completed): Take "signal" instead of
                                        "condition" argument.  Use it
                                        accordingly.  Remove dead code
                                        (os.WCOREDUMP case).

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    exit
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fi
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ifkeys=`env | sed -n -e 's/^ADDRESS_\([^=]*\)=.*/\1/p' "$CONFIG" \
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    | sort -u`
 
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ifkeys=`sed -n -e 's/^ADDRESS_\([^=]*\)=.*/\1/p' "$CONFIG" | sort -u`
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# Exit if DEVICE is set and is not any of the wireless interfaces
42
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if [ -n "$DEVICE" ]; then
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        for KEY in $ifkeys; do
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            ADDRESS=`eval 'echo "$ADDRESS_'"$KEY"\"`
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            INTERFACE=`addrtoif "$ADDRESS"`
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            if [ "$INTERFACE" = "$DEVICE" ]; then
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                break 2
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            fi
 
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            case "$DEVICE" in
 
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                *,"$INTERFACE"|*,"$INTERFACE",*|"$INTERFACE",*|"$INTERFACE")
 
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                    break 2;;
 
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            esac
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        done
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        exit
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    done
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    WPAS_OPTIONS="-P$PIDFILE $WPAS_OPTIONS"
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fi
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case "${MODE:-$1}" in
77
 
    start)
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        mkdir -m u=rwx,go= -p "$CTRLDIR"
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        "$wpa_supplicant" -B -g "$CTRL" -p "$CTRLDIR" $WPAS_OPTIONS
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        for KEY in $ifkeys; do
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            ADDRESS=`eval 'echo "$ADDRESS_'"$KEY"\"`
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            INTERFACE=`addrtoif "$ADDRESS"`
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            DRIVER=`eval 'echo "$WPA_DRIVER_'"$KEY"\"`
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            IFDELAY=`eval 'echo "$DELAY_'"$KEY"\"`
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            "$wpa_cli" -g "$CTRL" interface_add "$INTERFACE" "" \
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                "${DRIVER:-wext}" "$CTRLDIR" > /dev/null \
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                | sed -e '/^OK$/d'
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            NETWORK=`"$wpa_cli" -p "$CTRLDIR" -i "$INTERFACE" \
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                add_network`
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            eval wpa_interface_"$KEY"
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            "$wpa_cli" -p "$CTRLDIR" -i "$INTERFACE" enable_network \
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                "$NETWORK" | sed -e '/^OK$/d'
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            sleep "${IFDELAY:-$DELAY}" &
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            sleep=$!
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            while :; do
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                kill -0 $sleep 2>/dev/null || break
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                STATE=`"$wpa_cli" -p "$CTRLDIR" -i "$INTERFACE" \
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                    status | sed -n -e 's/^wpa_state=//p'`
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                if [ "$STATE" = COMPLETED ]; then
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                    while :; do
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                        kill -0 $sleep 2>/dev/null || break 2
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                        UP=`cat /sys/class/net/"$INTERFACE"/operstate`
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                        if [ "$UP" = up ]; then
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                            kill $sleep 2>/dev/null
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                            break 2
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                        fi
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                        sleep 1
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                    done
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                fi
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                sleep 1
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            done &
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            wait $sleep || :
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            IPADDRS=`eval 'echo "$IPADDRS_'"$KEY"\"`
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            if [ -n "$IPADDRS" ]; then
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                if [ "$IPADDRS" = dhcp ]; then
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                    ipconfig -c dhcp -d "$INTERFACE" || :
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                    #dhclient "$INTERFACE"
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                else
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                    for ipaddr in $IPADDRS; do
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                        "$ip" addr add "$ipaddr" dev "$INTERFACE"
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                    done
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                fi
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            fi
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            ROUTES=`eval 'echo "$ROUTES_'"$KEY"\"`
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            if [ -n "$ROUTES" ]; then
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                for route in $ROUTES; do
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                    "$ip" route add "$route" dev "$BRIDGE"
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                done
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            fi
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        done
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        ;;
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    stop)
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        "$wpa_cli" -g "$CTRL" terminate 2>&1 | sed -e '/^OK$/d'
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        for KEY in $ifkeys; do
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            ADDRESS=`eval 'echo "$ADDRESS_'"$KEY"\"`
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            INTERFACE=`addrtoif "$ADDRESS"`
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            "$ip" addr show scope global permanent dev "$INTERFACE" \
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                | while read type addr rest; do
 
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do_start(){
 
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    mkdir -m u=rwx,go= -p "$CTRLDIR"
 
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    "$wpa_supplicant" -B -g "$CTRL" -p "$CTRLDIR" $WPAS_OPTIONS
 
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    for KEY in $ifkeys; do
 
81
        ADDRESS=`eval 'echo "$ADDRESS_'"$KEY"\"`
 
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        INTERFACE=`addrtoif "$ADDRESS"`
 
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        DRIVER=`eval 'echo "$WPA_DRIVER_'"$KEY"\"`
 
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        IFDELAY=`eval 'echo "$DELAY_'"$KEY"\"`
 
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        "$wpa_cli" -g "$CTRL" interface_add "$INTERFACE" "" \
 
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            "${DRIVER:-wext}" "$CTRLDIR" > /dev/null \
 
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            | sed -e '/^OK$/d'
 
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        NETWORK=`"$wpa_cli" -p "$CTRLDIR" -i "$INTERFACE" add_network`
 
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        eval wpa_interface_"$KEY"
 
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        "$wpa_cli" -p "$CTRLDIR" -i "$INTERFACE" enable_network \
 
91
            "$NETWORK" | sed -e '/^OK$/d'
 
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        sleep "${IFDELAY:-$DELAY}" &
 
93
        sleep=$!
 
94
        while :; do
 
95
            kill -0 $sleep 2>/dev/null || break
 
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            STATE=`"$wpa_cli" -p "$CTRLDIR" -i "$INTERFACE" status \
 
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                | sed -n -e 's/^wpa_state=//p'`
 
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            if [ "$STATE" = COMPLETED ]; then
 
99
                while :; do
 
100
                    kill -0 $sleep 2>/dev/null || break 2
 
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                    UP=`cat /sys/class/net/"$INTERFACE"/operstate`
 
102
                    if [ "$UP" = up ]; then
 
103
                        kill $sleep 2>/dev/null
 
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                        break 2
 
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                    fi
 
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                    sleep 1
 
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                done
 
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            fi
 
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            sleep 1
 
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        done &
 
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        wait $sleep || :
 
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        IPADDRS=`eval 'echo "$IPADDRS_'"$KEY"\"`
 
113
        if [ -n "$IPADDRS" ]; then
 
114
            if [ "$IPADDRS" = dhcp ]; then
 
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                ipconfig -c dhcp -d "$INTERFACE" || :
 
116
                #dhclient "$INTERFACE"
 
117
            else
 
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                for ipaddr in $IPADDRS; do
 
119
                    "$ip" addr add "$ipaddr" dev "$INTERFACE"
 
120
                done
 
121
            fi
 
122
        fi
 
123
        ROUTES=`eval 'echo "$ROUTES_'"$KEY"\"`
 
124
        if [ -n "$ROUTES" ]; then
 
125
            for route in $ROUTES; do
 
126
                "$ip" route add "$route" dev "$INTERFACE"
 
127
            done
 
128
        fi
 
129
    done
 
130
}
 
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132
do_stop(){
 
133
    "$wpa_cli" -g "$CTRL" terminate 2>&1 | sed -e '/^OK$/d'
 
134
    for KEY in $ifkeys; do
 
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        ADDRESS=`eval 'echo "$ADDRESS_'"$KEY"\"`
 
136
        INTERFACE=`addrtoif "$ADDRESS"`
 
137
        "$ip" addr show scope global permanent dev "$INTERFACE" \
 
138
            | while read type addr rest; do
139
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                case "$type" in
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                    inet|inet6)
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                        "$ip" addr del "$addr" dev "$INTERFACE"
142
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                        ;;
143
143
                esac
144
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            done
145
 
            "$ip" link set dev "$INTERFACE" down
146
 
        done
 
145
        "$ip" link set dev "$INTERFACE" down
 
146
    done
 
147
}
 
148
 
 
149
case "${MODE:-$1}" in
 
150
    start|stop)
 
151
        do_"${MODE:-$1}"
147
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        ;;
148
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    files)
149
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        echo "$wpa_supplicant"