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#!/bin/sh ##################################################################### ## Purpose # This file contains common shell functions used by scripts of the # wpasupplicant package to allow ifupdown to manage wpa_supplicant. # It also contains some functions used by wpa_action(8) that allow # ifupdown to be managed by wpa_cli(8) action events. # # This file is provided by the wpasupplicant package. ##################################################################### # Copyright (C) 2006 - 2009 Debian/Ubuntu wpasupplicant Maintainers # <pkg-wpa-devel@lists.alioth.debian.org> # # 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; either version 2 # of the License, or (at your option) any later version. # # 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. # # On Debian GNU/Linux systems, the text of the GPL license, # version 2, can be found in /usr/share/common-licenses/GPL-2. ##################################################################### ## global variables # wpa_supplicant variables WPA_SUP_BIN="/sbin/wpa_supplicant" WPA_SUP_PNAME="wpa_supplicant" WPA_SUP_PIDFILE="/run/wpa_supplicant.${WPA_IFACE}.pid" WPA_SUP_OMIT_DIR="/run/sendsigs.omit.d" WPA_SUP_OMIT_PIDFILE="${WPA_SUP_OMIT_DIR}/wpasupplicant.wpa_supplicant.${WPA_IFACE}.pid" # wpa_cli variables WPA_CLI_BIN="/sbin/wpa_cli" WPA_CLI_PNAME="wpa_cli" WPA_CLI_PIDFILE="/run/wpa_action.${WPA_IFACE}.pid" WPA_CLI_TIMESTAMP="/run/wpa_action.${WPA_IFACE}.timestamp" WPA_CLI_IFUPDOWN="/run/wpa_action.${WPA_IFACE}.ifupdown" # default ctrl_interface socket directory if [ -z "$WPA_CTRL_DIR" ]; then WPA_CTRL_DIR="/run/wpa_supplicant" fi # verbosity variables if [ -n "$IF_WPA_VERBOSITY" ] || [ "$VERBOSITY" = "1" ]; then TO_NULL="/dev/stdout" DAEMON_VERBOSITY="--verbose" else TO_NULL="/dev/null" DAEMON_VERBOSITY="--quiet" fi ##################################################################### ## wpa_cli wrapper # Path to common ctrl_interface socket and iface supplied. # NB: WPA_CTRL_DIR cannot be used for interactive commands, it is # set only in the environment that wpa_cli provides when processing # action events. # wpa_cli () { "$WPA_CLI_BIN" -p "$WPA_CTRL_DIR" -i "$WPA_IFACE" "$@" return "$?" } ##################################################################### ## verbose and stderr message wrapper # Ensures a standard and easily identifiable message is printed by # scripts using this function library. # # log Log a message to syslog when called non-interactively # by wpa_action # # verbose To stdout when IF_WPA_VERBOSITY or VERBOSITY is true # # action Same as verbose but without newline # Useful for allowing wpa_cli commands to echo result # value of 'OK' or 'FAILED' # # stderr Echo warning or error messages to stderr # # NB: when called by wpa_action, there is no redirection (verbose) # wpa_msg () { if [ "$1" = "log" ]; then shift case "$WPA_ACTION" in "CONNECTED"|"DISCONNECTED") [ -x /usr/bin/logger ] || return if [ "$#" -gt 0 ]; then logger -t "wpa_action" "$@" else logger -t "wpa_action" fi ;; *) [ "$#" -gt 0 ] && echo "wpa_action: $@" ;; esac return fi case "$1" in "verbose") shift echo "$WPA_SUP_PNAME: $@" >$TO_NULL ;; "action") shift echo -n "$WPA_SUP_PNAME: $@ -- " >$TO_NULL ;; "stderr") shift echo "$WPA_SUP_PNAME: $@" >/dev/stderr ;; *) ;; esac } ##################################################################### ## validate daemon pid files # Test daemon process ID files via start-stop-daemon with a signal 0 # given the exec binary and pidfile location. # # $1 daemon # $2 pidfile # # Returns true when pidfile exists, the process ID exists _and_ was # created by the exec binary. # # If the test fails, but the pidfile exists, it is stale # test_daemon_pidfile () { local DAEMON local PIDFILE if [ -n "$1" ]; then DAEMON="$1" fi if [ -f "$2" ]; then PIDFILE="$2" fi if [ -n "$DAEMON" ] && [ -f "$PIDFILE" ]; then if start-stop-daemon --stop --quiet --signal 0 \ --exec "$DAEMON" --pidfile "$PIDFILE"; then return 0 else rm -f "$PIDFILE" return 1 fi else return 1 fi } # validate wpa_supplicant pidfile test_wpa_supplicant () { test_daemon_pidfile "$WPA_SUP_BIN" "$WPA_SUP_PIDFILE" } # validate wpa_cli pidfile test_wpa_cli () { test_daemon_pidfile "$WPA_CLI_BIN" "$WPA_CLI_PIDFILE" } ##################################################################### ## daemonize wpa_supplicant # Start wpa_supplicant via start-stop-dameon with all required # options. Will start if environment variable WPA_SUP_CONF is present # # Default options: # -B dameonize/background process # -D driver backend ('wext' if none given) # -P process ID file # -C path to ctrl_interface socket directory # -s log to syslog # # Conditional options: # -c configuration file # -W wait for wpa_cli to attach to ctrl_interface socket # -b bridge interface name # -f path to log file # init_wpa_supplicant () { [ -n "$WPA_SUP_CONF" ] || return 0 local WPA_SUP_OPTIONS WPA_SUP_OPTIONS="-s -B -P $WPA_SUP_PIDFILE -i $WPA_IFACE" if [ -n "$WPA_ACTION_SCRIPT" ]; then if [ -x "$WPA_ACTION_SCRIPT" ]; then WPA_SUP_OPTIONS="$WPA_SUP_OPTIONS -W" wpa_msg verbose "wait for wpa_cli to attach" else wpa_msg stderr "action script \"$WPA_ACTION_SCRIPT\" not executable" return 1 fi fi if [ -n "$IF_WPA_BRIDGE" ]; then WPA_SUP_OPTIONS="$WPA_SUP_OPTIONS -b $IF_WPA_BRIDGE" wpa_msg verbose "wpa-bridge $IF_WPA_BRIDGE" fi if [ -n "$IF_WPA_DRIVER" ]; then wpa_msg verbose "wpa-driver $IF_WPA_DRIVER" case "$IF_WPA_DRIVER" in hostap|ipw|madwifi|ndiswrapper) WPA_SUP_OPTIONS="$WPA_SUP_OPTIONS -D nl80211,wext" wpa_msg stderr "\"$IF_WPA_DRIVER\" wpa-driver is unsupported" wpa_msg stderr "using \"nl80211,wext\" wpa-driver instead ..." ;; *) WPA_SUP_OPTIONS="$WPA_SUP_OPTIONS -D $IF_WPA_DRIVER" ;; esac else WPA_SUP_OPTIONS="$WPA_SUP_OPTIONS -D nl80211,wext" wpa_msg verbose "wpa-driver nl80211,wext (default)" fi if [ -n "$IF_WPA_DEBUG_LEVEL" ]; then case "$IF_WPA_DEBUG_LEVEL" in 3) WPA_SUP_OPTIONS="$WPA_SUP_OPTIONS -t -ddd" ;; 2) WPA_SUP_OPTIONS="$WPA_SUP_OPTIONS -t -dd" ;; 1) WPA_SUP_OPTIONS="$WPA_SUP_OPTIONS -t -d" ;; 0) # wpa_supplicant default verbosity ;; -1) WPA_SUP_OPTIONS="$WPA_SUP_OPTIONS -q" ;; -2) WPA_SUP_OPTIONS="$WPA_SUP_OPTIONS -qq" ;; esac wpa_msg verbose "using debug level: $IF_WPA_DEBUG_LEVEL" fi if [ -n "$IF_WPA_LOGFILE" ]; then # custom log file WPA_SUP_OPTIONS="$WPA_SUP_OPTIONS -f $IF_WPA_LOGFILE" WPA_SUP_LOGFILE="$IF_WPA_LOGFILE" wpa_msg verbose "logging to $IF_WPA_LOGFILE" fi wpa_msg verbose "$WPA_SUP_BIN $WPA_SUP_OPTIONS $WPA_SUP_CONF" start-stop-daemon --start --oknodo $DAEMON_VERBOSITY \ --name $WPA_SUP_PNAME --startas $WPA_SUP_BIN --pidfile $WPA_SUP_PIDFILE \ -- $WPA_SUP_OPTIONS $WPA_SUP_CONF if [ "$?" -ne 0 ]; then wpa_msg stderr "$WPA_SUP_BIN daemon failed to start" return 1 fi local WPA_PIDFILE_WAIT local MAX_WPA_PIDFILE_WAIT WPA_PIDFILE_WAIT="0" MAX_WPA_PIDFILE_WAIT="5" until [ -s "$WPA_SUP_PIDFILE" ]; do if [ "$WPA_PIDFILE_WAIT" -ge "$MAX_WPA_PIDFILE_WAIT" ]; then wpa_msg stderr "timed out waiting for creation of $WPA_SUP_PIDFILE" return 1 else wpa_msg verbose "waiting for \"$WPA_SUP_PIDFILE\": " \ "$WPA_PIDFILE_WAIT (max. $MAX_WPA_PIDFILE_WAIT)" fi WPA_PIDFILE_WAIT=$(($WPA_PIDFILE_WAIT + 1)) sleep 1 done if [ -d "${WPA_SUP_OMIT_DIR}" ]; then wpa_msg verbose "creating sendsigs omission pidfile: $WPA_SUP_OMIT_PIDFILE" cat "$WPA_SUP_PIDFILE" > "$WPA_SUP_OMIT_PIDFILE" fi local WPA_SOCKET_WAIT local MAX_WPA_SOCKET_WAIT WPA_SOCKET_WAIT="0" MAX_WPA_SOCKET_WAIT="5" until [ -S "$WPA_CTRL_DIR/$WPA_IFACE" ]; do if [ "$WPA_SOCKET_WAIT" -ge "$MAX_WPA_SOCKET_WAIT" ]; then wpa_msg stderr "ctrl_interface socket not found at $WPA_CTRL_DIR/$WPA_IFACE" return 1 else wpa_msg verbose "waiting for \"$WPA_CTRL_DIR/$WPA_IFACE\": " \ "$WPA_SOCKET_WAIT (max. $MAX_WPA_SOCKET_WAIT)" fi WPA_SOCKET_WAIT=$(($WPA_SOCKET_WAIT + 1)) sleep 1 done wpa_msg verbose "ctrl_interface socket located at $WPA_CTRL_DIR/$WPA_IFACE" } ##################################################################### ## stop wpa_supplicant process # Kill wpa_supplicant via start-stop-daemon, given the location of # the pidfile or ctrl_interface socket path and interface name # kill_wpa_supplicant () { test_wpa_supplicant || return 0 wpa_msg verbose "terminating $WPA_SUP_PNAME daemon via pidfile $WPA_SUP_PIDFILE" start-stop-daemon --stop --oknodo $DAEMON_VERBOSITY \ --exec $WPA_SUP_BIN --pidfile $WPA_SUP_PIDFILE if [ -f "$WPA_SUP_PIDFILE" ]; then rm -f "$WPA_SUP_PIDFILE" fi if [ -f "$WPA_SUP_OMIT_PIDFILE" ]; then wpa_msg verbose "removing $WPA_SUP_OMIT_PIDFILE" rm -f "$WPA_SUP_OMIT_PIDFILE" fi } ##################################################################### ## reload wpa_supplicant process # Sending a HUP signal causes wpa_supplicant to reparse its # configuration file # reload_wpa_supplicant () { if test_wpa_supplicant; then wpa_msg verbose "reloading wpa_supplicant configuration file via HUP signal" start-stop-daemon --stop --signal HUP \ --name "$WPA_SUP_PNAME" --pidfile "$WPA_SUP_PIDFILE" else wpa_msg verbose "cannot $WPA_ACTION, $WPA_SUP_PIDFILE does not exist" fi } ##################################################################### ## daemonize wpa_cli and action script # If environment variable WPA_ACTION_SCRIPT is present, wpa_cli will # be spawned via start-stop-daemon # # Required options: # -a action script => wpa_action # -P process ID file # -B background process # init_wpa_cli () { [ -n "$WPA_ACTION_SCRIPT" ] || return 0 local WPA_CLI_OPTIONS WPA_CLI_OPTIONS="-B -P $WPA_CLI_PIDFILE -i $WPA_IFACE" wpa_msg verbose "$WPA_CLI_BIN $WPA_CLI_OPTIONS -p $WPA_CTRL_DIR -a $WPA_ACTION_SCRIPT" start-stop-daemon --start --oknodo $DAEMON_VERBOSITY \ --name $WPA_CLI_PNAME --startas $WPA_CLI_BIN --pidfile $WPA_CLI_PIDFILE \ -- $WPA_CLI_OPTIONS -p $WPA_CTRL_DIR -a $WPA_ACTION_SCRIPT if [ "$?" -ne 0 ]; then wpa_msg stderr "$WPA_CLI_BIN daemon failed to start" return 1 fi } ##################################################################### ## stop wpa_cli process # Kill wpa_cli via start-stop-daemon, given the location of the # pidfile # kill_wpa_cli () { test_wpa_cli || return 0 wpa_msg verbose "terminating $WPA_CLI_PNAME daemon via pidfile $WPA_CLI_PIDFILE" start-stop-daemon --stop --oknodo $DAEMON_VERBOSITY \ --exec $WPA_CLI_BIN --pidfile $WPA_CLI_PIDFILE if [ -f "$WPA_CLI_PIDFILE" ]; then rm -f "$WPA_CLI_PIDFILE" fi if [ -f "$WPA_CLI_TIMESTAMP" ]; then rm -f "$WPA_CLI_TIMESTAMP" fi if [ -L "$WPA_CLI_IFUPDOWN" ]; then rm -f "$WPA_CLI_IFUPDOWN" fi } ##################################################################### ## higher level wpa_cli wrapper for variable and set_network commands # wpa_cli_do <value> <type> <variable> [set_network variable] <desc> # # $1 envorinment variable # $2 data type of variable {raw|ascii} # $3 wpa_cli variable, if $3 is set_network, shift and take # set_network subvariable # $4 wpa-* string as it would appear in interfaces file, enhances # verbose messages # wpa_cli_do () { if [ -z "$1" ]; then return 0 fi local WPACLISET_VALUE local WPACLISET_VARIABLE local WPACLISET_DESC case "$2" in ascii) # Double quote WPACLISET_VALUE="\"$1\"" ;; raw|*) # Provide raw value WPACLISET_VALUE="$1" ;; esac case "$3" in set_network) if [ -z "$WPA_ID" ]; then return 1 fi shift WPACLISET_VARIABLE="set_network $WPA_ID $3" ;; *) WPACLISET_VARIABLE="$3" ;; esac case "$4" in *-psk|*-passphrase|*-passwd*|*-password*|*-wep-key*) WPACLISET_DESC="$4 *****" ;; *) WPACLISET_DESC="$4 $WPACLISET_VALUE" ;; esac wpa_msg action "$WPACLISET_DESC" wpa_cli $WPACLISET_VARIABLE "$WPACLISET_VALUE" >$TO_NULL if [ "$?" -ne 0 ]; then wpa_msg stderr "$WPACLISET_DESC failed!" fi } ##################################################################### ## check value data type in plaintext or hex # returns 0 if input consists of hexadecimal digits only, 1 otherwise # ishex () { if [ -z "$1" ]; then return 0 fi case "$1" in *[!0-9a-fA-F]*) # plaintext return 1 ;; *) # hexadecimal return 0 ;; esac } ##################################################################### ## sanity check and set psk|passphrase # Warn about strange psk|passphrase values # # $1 psk or passphrase value # # If psk is surrounded by quotes strip them. # # If psk contains all hexadecimal characters and string length is 64: # is 256bit hexadecimal # else: # is plaintext # # plaintext passphrases must be 8 - 63 characters in length # 256-bit hexadecimal key must be 64 characters in length # wpa_key_check_and_set () { if [ "$#" -ne 3 ]; then return 0 fi local KEY local KEY_LEN local KEY_TYPE local ENC_TYPE case "$1" in '"'*'"') # Strip surrounding quotation marks KEY=$(echo -n "$1" | sed 's/^"//;s/"$//') ;; *) KEY="$1" ;; esac KEY_LEN="${#KEY}" case "$2" in wep_key*) ENC_TYPE="WEP" ;; psk) ENC_TYPE="WPA" ;; *) return 0 ;; esac if [ "$ENC_TYPE" = "WEP" ]; then if ishex "$KEY"; then case "$KEY_LEN" in 10|26|32|58) # 64/128/152/256-bit WEP KEY_TYPE="raw" ;; *) KEY_TYPE="ascii" ;; esac else KEY_TYPE="ascii" fi if [ "$KEY_TYPE" = "ascii" ]; then if [ "$KEY_LEN" -lt "5" ]; then wpa_msg stderr "WARNING: plaintext or ascii WEP key has $KEY_LEN characters," wpa_msg stderr "it must have at least 5 to be valid." fi fi elif [ "$ENC_TYPE" = "WPA" ]; then if ishex "$KEY"; then case "$KEY_LEN" in 64) # 256-bit WPA KEY_TYPE="raw" ;; *) KEY_TYPE="ascii" ;; esac else KEY_TYPE="ascii" fi if [ "$KEY_TYPE" = "ascii" ]; then if [ "$KEY_LEN" -lt "8" ] || [ "$KEY_LEN" -gt "63" ]; then wpa_msg stderr "WARNING: plaintext or ascii WPA key has $KEY_LEN characters," wpa_msg stderr "it must have between 8 and 63 to be valid." wpa_msg stderr "If the WPA key is a 256-bit hexadecimal key, it must have" wpa_msg stderr "exactly 64 characters." fi fi fi wpa_cli_do "$KEY" "$KEY_TYPE" set_network "$2" "$3" } ##################################################################### ## formulate a usable configuration from interfaces(5) wpa- lines # A series of wpa_cli commands corresponding to environment variables # created as a result of wpa- lines in an interfaces stanza. # # NB: no-act when roaming daemon is used (to avoid prematurely # attaching to ctrl_interface socket) # conf_wpa_supplicant () { if [ -n "$WPA_ACTION_SCRIPT" ]; then return 0 fi if [ "$IF_WPA_DRIVER" = "wired" ]; then IF_WPA_AP_SCAN="0" wpa_msg verbose "forcing ap_scan=0 (required for wired IEEE8021X auth)" fi if [ -n "$IF_WPA_ESSID" ]; then # #403316, be similar to wireless tools IF_WPA_SSID="$IF_WPA_ESSID" fi wpa_cli_do "$IF_WPA_AP_SCAN" raw \ ap_scan wpa-ap-scan wpa_cli_do "$IF_WPA_PREAUTHENTICATE" raw \ preauthenticate wpa-preauthenticate if [ -n "$IF_WPA_SSID" ] || [ "$IF_WPA_DRIVER" = "wired" ] || \ [ -n "$IF_WPA_KEY_MGMT" ]; then case "$IF_WPA_SSID" in '"'*'"') IF_WPA_SSID=$(echo -n "$IF_WPA_SSID" | sed 's/^"//;s/"$//') ;; *) ;; esac WPA_ID=$(wpa_cli add_network) wpa_msg verbose "configuring network block -- $WPA_ID" wpa_cli_do "$IF_WPA_SSID" ascii \ set_network ssid wpa-ssid wpa_cli_do "$IF_WPA_PRIORITY" raw \ set_network priority wpa-priority wpa_cli_do "$IF_WPA_BSSID" raw \ set_network bssid wpa-bssid if [ -s "$IF_WPA_PSK_FILE" ]; then IF_WPA_PSK=$(cat "$IF_WPA_PSK_FILE") fi # remain compat with wpa-passphrase-file if [ -s "$IF_WPA_PASSPHRASE_FILE" ]; then IF_WPA_PSK=$(cat "$IF_WPA_PASSPHRASE_FILE") fi # remain compat with wpa-passphrase if [ -n "$IF_WPA_PASSPHRASE" ]; then IF_WPA_PSK="$IF_WPA_PASSPHRASE" fi if [ -n "$IF_WPA_PSK" ]; then wpa_key_check_and_set "$IF_WPA_PSK" \ psk wpa-psk fi wpa_cli_do "$IF_WPA_PAIRWISE" raw \ set_network pairwise wpa-pairwise wpa_cli_do "$IF_WPA_GROUP" raw \ set_network group wpa-group wpa_cli_do "$IF_WPA_MODE" raw \ set_network mode wpa-mode wpa_cli_do "$IF_WPA_FREQUENCY" raw \ set_network frequency wpa-frequency wpa_cli_do "$IF_WPA_SCAN_FREQ" raw \ set_network scan_freq wpa-scan-freq wpa_cli_do "$IF_WPA_FREQ_LIST" raw \ set_network freq_list wpa-freq-list wpa_cli_do "$IF_WPA_KEY_MGMT" raw \ set_network key_mgmt wpa-key-mgmt wpa_cli_do "$IF_WPA_PROTO" raw \ set_network proto wpa-proto wpa_cli_do "$IF_WPA_AUTH_ALG" raw \ set_network auth_alg wpa-auth-alg wpa_cli_do "$IF_WPA_SCAN_SSID" raw \ set_network scan_ssid wpa-scan-ssid wpa_cli_do "$IF_WPA_IDENTITY" ascii \ set_network identity wpa-identity wpa_cli_do "$IF_WPA_ANONYMOUS_IDENTITY" ascii \ set_network anonymous_identity wpa-anonymous-identity wpa_cli_do "$IF_WPA_EAP" raw \ set_network eap wpa-eap wpa_cli_do "$IF_WPA_EAPPSK" raw \ set_network eappsk wpa-eappsk wpa_cli_do "$IF_WPA_NAI" ascii \ set_network nai wpa-nai wpa_cli_do "$IF_WPA_PASSWORD" ascii \ set_network password wpa-password wpa_cli_do "$IF_WPA_CA_CERT" ascii \ set_network ca_cert wpa-ca-cert wpa_cli_do "$IF_WPA_CA_PATH" ascii \ set_network ca_path wpa-ca-path wpa_cli_do "$IF_WPA_CLIENT_CERT" ascii \ set_network client_cert wpa-client-cert wpa_cli_do "$IF_WPA_PRIVATE_KEY" ascii \ set_network private_key wpa-private-key wpa_cli_do "$IF_WPA_PRIVATE_KEY_PASSWD" ascii \ set_network private_key_passwd wpa-private-key-passwd wpa_cli_do "$IF_WPA_DH_FILE" ascii \ set_network dh_file wpa-dh-file wpa_cli_do "$IF_WPA_SUBJECT_MATCH" ascii \ set_network subject_match wpa-subject-match wpa_cli_do "$IF_WPA_ALTSUBJECT_MATCH" ascii \ set_network altsubject_match wpa-altsubject-match wpa_cli_do "$IF_WPA_CA_CERT2" ascii \ set_network ca_cert2 wpa-ca-cert2 wpa_cli_do "$IF_WPA_CA_PATH2" ascii \ set_network ca_path2 wpa-ca-path2 wpa_cli_do "$IF_WPA_CLIENT_CERT2" ascii \ set_network client_cert2 wpa-client-cert2 wpa_cli_do "$IF_WPA_PRIVATE_KEY2" ascii \ set_network private_key2 wpa-private-key2 wpa_cli_do "$IF_WPA_PRIVATE_KEY_PASSWD2" ascii \ set_network private_key_passwd2 wpa-private-key-passwd2 wpa_cli_do "$IF_WPA_DH_FILE2" ascii \ set_network dh_file2 wpa-dh-file2 wpa_cli_do "$IF_WPA_SUBJECT_MATCH2" ascii \ set_network subject_match2 wpa-subject-match2 wpa_cli_do "$IF_WPA_ALTSUBJECT_MATCH2" ascii \ set_network altsubject_match2 wpa-altsubject-match2 wpa_cli_do "$IF_WPA_EAP_METHODS" raw \ set_network eap_methods wpa-eap-methods wpa_cli_do "$IF_WPA_PHASE1" ascii \ set_network phase1 wpa-phase1 wpa_cli_do "$IF_WPA_PHASE2" ascii \ set_network phase2 wpa-phase2 wpa_cli_do "$IF_WPA_PCSC" raw \ set_network pcsc wpa-pcsc wpa_cli_do "$IF_WPA_PIN" ascii \ set_network pin wpa-pin wpa_cli_do "$IF_WPA_ENGINE" raw \ set_network engine wpa-engine wpa_cli_do "$IF_WPA_ENGINE_ID" ascii \ set_network engine_id wpa-engine-id wpa_cli_do "$IF_WPA_KEY_ID" ascii \ set_network key_id wpa-key-id wpa_cli_do "$IF_WPA_EAPOL_FLAGS" raw \ set_network eapol_flags wpa-eapol-flags if [ -n "$IF_WPA_WEP_KEY0" ]; then wpa_key_check_and_set "$IF_WPA_WEP_KEY0" \ wep_key0 wpa-wep-key0 fi if [ -n "$IF_WPA_WEP_KEY1" ]; then wpa_key_check_and_set "$IF_WPA_WEP_KEY1" \ wep_key1 wpa-wep-key1 fi if [ -n "$IF_WPA_WEP_KEY2" ]; then wpa_key_check_and_set "$IF_WPA_WEP_KEY2" \ wep_key2 wpa-wep-key2 fi if [ -n "$IF_WPA_WEP_KEY3" ]; then wpa_key_check_and_set "$IF_WPA_WEP_KEY3" \ wep_key3 wpa-wep-key3 fi wpa_cli_do "$IF_WPA_WEP_TX_KEYIDX" raw \ set_network wep_tx_keyidx wpa-wep-tx-keyidx wpa_cli_do "$IF_WPA_PROACTIVE_KEY_CACHING" raw \ set_network proactive_key_caching wpa-proactive-key-caching wpa_cli_do "$IF_WPA_PAC_FILE" ascii \ set_network pac_file wpa-pac-file wpa_cli_do "$IF_WPA_PEERKEY" raw \ set_network peerkey wpa-peerkey wpa_cli_do "$IF_FRAGMENT_SIZE" raw \ set_network fragment_size wpa-fragment-size wpa_cli_do "$IF_WPA_ID_STR" ascii \ set_network id_str wpa-id-str wpa_cli_do "$WPA_ID" raw \ enable_network "enabling network block" fi } ##################################################################### ## Log wpa_cli environment variables wpa_log_env () { wpa_msg log "WPA_IFACE=$WPA_IFACE WPA_ACTION=$WPA_ACTION" wpa_msg log "WPA_ID=$WPA_ID WPA_ID_STR=$WPA_ID_STR WPA_CTRL_DIR=$WPA_CTRL_DIR" } ##################################################################### ## hysteresis checking # Networking tools such as dhcp clients used with ifupdown can # synthesize artificial ACTION events, particularly just after a # DISCONNECTED/CONNECTED events are experienced in quick succession. # This can lead to infinite event loops, and in extreme cases has the # potential to cause system instability. # wpa_hysteresis_event () { echo "$(date +%s)" > "$WPA_CLI_TIMESTAMP" 2>/dev/null } wpa_hysteresis_check () { if [ -f "$WPA_CLI_TIMESTAMP" ]; then local TIME local TIMESTAMP local TIMEWAIT TIME=$(date +%s) # current time minus 4 second event buffer TIMEWAIT=$(($TIME-4)) # get time of last event TIMESTAMP=$(cat $WPA_CLI_TIMESTAMP) # compare values, allowing new action to be processed # only if last action was more than 4 seconds ago if [ "$TIMEWAIT" -le "$TIMESTAMP" ]; then wpa_msg log "$WPA_ACTION event blocked by hysteresis check" return 1 fi fi return 0 } ##################################################################### ## ifupdown locking functions # A collection of rudimentary locking functions to lock ifup/ifdown # actions. # ifupdown_lock () { ln -s lock "$WPA_CLI_IFUPDOWN" } ifupdown_locked () { [ -L "$WPA_CLI_IFUPDOWN" ] && return 0 return 1 } ifupdown_unlock () { rm -f "$WPA_CLI_IFUPDOWN" } ##################################################################### ## apply mapping logic and ifup logical interface # Apply mapping logic via id_str or external mapping script, check # state of IFACE with respect to ifupdown and ifup logical interaface # ifup () { local INTERFACES_FILE local IFUP_RETVAL local WPA_LOGICAL_IFACE if [ -e /etc/network/interfaces ]; then INTERFACES_FILE="/etc/network/interfaces" else wpa_msg log "/etc/network/interfaces does not exist, $WPA_IFACE will not be configured" return 1 fi if [ -z "$IF_WPA_MAPPING_SCRIPT_PRIORITY" ] && [ -n "$WPA_ID_STR" ]; then WPA_LOGICAL_IFACE="$WPA_ID_STR" fi if [ -z "$WPA_LOGICAL_IFACE" ] && [ -n "$IF_WPA_MAPPING_SCRIPT" ]; then local WPA_MAP_STDIN WPA_MAP_STDIN=$(set | sed -n 's/^$IF_WPA_MAP[0-9]*$=.*/echo \$\1/p') if [ -n "$WPA_MAP_STDIN" ]; then WPA_LOGICAL_IFACE=$(eval "$WPA_MAP_STDIN" | "$IF_WPA_MAPPING_SCRIPT" "$WPA_IFACE") else WPA_LOGICAL_IFACE=$("$IF_WPA_MAPPING_SCRIPT" "$WPA_IFACE") fi if [ -n "$WPA_LOGICAL_IFACE" ]; then wpa_msg log "mapping script result: $WPA_LOGICAL_IFACE" else wpa_msg log "mapping script failed." fi fi if [ -z "$WPA_LOGICAL_IFACE" ]; then if [ -n "$IF_WPA_ROAM_DEFAULT_IFACE" ]; then WPA_LOGICAL_IFACE="$IF_WPA_ROAM_DEFAULT_IFACE" else WPA_LOGICAL_IFACE="default" fi fi if [ -n "$WPA_LOGICAL_IFACE" ]; then if ! /sbin/ifquery "${WPA_LOGICAL_IFACE}" > /dev/null 2>&1; then wpa_msg log "network settings not defined for $WPA_LOGICAL_IFACE in $INTERFACES_FILE and included files." WPA_LOGICAL_IFACE="default" fi wpa_msg log "ifup $WPA_IFACE=$WPA_LOGICAL_IFACE" ifupdown_lock if /sbin/ifquery "$WPA_IFACE" | grep -q '^wpa-roam: ' ; then # Force settings over the unconfigured "master" IFACE /sbin/ifup -v --force "$WPA_IFACE=$WPA_LOGICAL_IFACE" else /sbin/ifup -v "$WPA_IFACE=$WPA_LOGICAL_IFACE" fi IFUP_RETVAL="$?" ifupdown_unlock fi if [ -d "${WPA_SUP_OMIT_DIR}" ]; then wpa_msg log "creating sendsigs omission pidfile: $WPA_SUP_OMIT_PIDFILE" cat "$WPA_SUP_PIDFILE" > "$WPA_SUP_OMIT_PIDFILE" fi return "$IFUP_RETVAL" } ##################################################################### ## ifdown IFACE # Check IFACE state and ifdown as requested. # ifdown () { wpa_msg log "ifdown $WPA_IFACE" ifupdown_lock /sbin/ifdown -v "$WPA_IFACE" ifupdown_unlock wpa_msg log "removing sendsigs omission pidfile: $WPA_SUP_OMIT_PIDFILE" rm -f "$WPA_SUP_OMIT_PIDFILE" } ##################################################################### ## keep IFACE scanning # After ifdown, the IFACE may be left "down", and inhibits # wpa_supplicant's ability to continue roaming. # # NB: use iproute if present, flushing the IFACE first # if_post_down_up () { if [ -x /bin/ip ]; then ip addr flush dev "$WPA_IFACE" 2>/dev/null ip link set "$WPA_IFACE" up else ifconfig "$WPA_IFACE" up fi }