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      1 # Start, reconfigure and stop wpa_supplicant per wireless interface.
      2 #
      3 # This is only needed when using wpa_supplicant-2.5 or older, OR
      4 # when wpa_supplicant has not been built with CONFIG_MATCH_IFACE, OR
      5 # wpa_supplicant was launched without the -M flag to activate
      6 # interface matching.
      7 
      8 if [ -z "$wpa_supplicant_conf" ]; then
      9 	for x in \
     10 		/etc/wpa_supplicant/wpa_supplicant-"$interface".conf \
     11 		/etc/wpa_supplicant/wpa_supplicant.conf \
     12 		/etc/wpa_supplicant-"$interface".conf \
     13 		/etc/wpa_supplicant.conf \
     14 	; do
     15 		if [ -s "$x" ]; then
     16 			wpa_supplicant_conf="$x"
     17 			break
     18 		fi
     19 	done
     20 fi
     21 : ${wpa_supplicant_conf:=/etc/wpa_supplicant.conf}
     22 
     23 wpa_supplicant_ctrldir()
     24 {
     25 	dir=$(key_get_value "[[:space:]]*ctrl_interface=" \
     26 		"$wpa_supplicant_conf")
     27 	dir=$(trim "$dir")
     28 	case "$dir" in
     29 	DIR=*)
     30 		dir=${dir##DIR=}
     31 		dir=${dir%%[[:space:]]GROUP=*}
     32 		dir=$(trim "$dir")
     33 		;;
     34 	esac
     35 	printf %s "$dir"
     36 }
     37 
     38 wpa_supplicant_start()
     39 {
     40 	# If the carrier is up, don't bother checking anything
     41 	[ "$ifcarrier" = "up" ] && return 0
     42 
     43 	# Pre flight checks
     44 	if [ ! -s "$wpa_supplicant_conf" ]; then
     45 		syslog warn \
     46 			"$wpa_supplicant_conf does not exist"
     47 		syslog warn "not interacting with wpa_supplicant(8)"
     48 		return 1
     49 	fi
     50 	dir=$(wpa_supplicant_ctrldir)
     51 	if [ -z "$dir" ]; then
     52 		syslog warn \
     53 			"ctrl_interface not defined in $wpa_supplicant_conf"
     54 		syslog warn "not interacting with wpa_supplicant(8)"
     55 		return 1
     56 	fi
     57 
     58 	wpa_cli -p "$dir" -i "$interface" status >/dev/null 2>&1 && return 0
     59 	syslog info "starting wpa_supplicant"
     60 	driver=${wpa_supplicant_driver:+-D}$wpa_supplicant_driver
     61 	err=$(wpa_supplicant -B -c"$wpa_supplicant_conf" -i"$interface" \
     62 	    "$driver" 2>&1)
     63 	errn=$?
     64 	if [ $errn != 0 ]; then
     65 		syslog err "failed to start wpa_supplicant"
     66 		syslog err "$err"
     67 	fi
     68 	return $errn
     69 }
     70 
     71 wpa_supplicant_reconfigure()
     72 {
     73 	dir=$(wpa_supplicant_ctrldir)
     74 	[ -z "$dir" ] && return 1
     75 	if ! wpa_cli -p "$dir" -i "$interface" status >/dev/null 2>&1; then
     76 		wpa_supplicant_start
     77 		return $?
     78 	fi
     79 	syslog info "reconfiguring wpa_supplicant"
     80 	err=$(wpa_cli -p "$dir" -i "$interface" reconfigure 2>&1)
     81 	errn=$?
     82 	if [ $errn != 0 ]; then
     83 		syslog err "failed to reconfigure wpa_supplicant"
     84 		syslog err "$err"
     85 	fi
     86 	return $errn
     87 }
     88 
     89 wpa_supplicant_stop()
     90 {
     91 	dir=$(wpa_supplicant_ctrldir)
     92 	[ -z "$dir" ] && return 1
     93 	wpa_cli -p "$dir" -i "$interface" status >/dev/null 2>&1 || return 0
     94 	syslog info "stopping wpa_supplicant"
     95 	err=$(wpa_cli -i"$interface" terminate 2>&1)
     96 	errn=$?
     97 	if [ $errn != 0 ]; then
     98 		syslog err "failed to stop wpa_supplicant"
     99 		syslog err "$err"
    100 	fi
    101 	return $errn
    102 }
    103 
    104 if [ "$ifwireless" = "1" ] && \
    105     command -v wpa_supplicant >/dev/null 2>&1 && \
    106     command -v wpa_cli >/dev/null 2>&1
    107 then
    108 	case "$reason" in
    109 	PREINIT)		wpa_supplicant_start;;
    110 	RECONFIGURE)		wpa_supplicant_reconfigure;;
    111 	DEPARTED|STOPPED)	wpa_supplicant_stop;;
    112 	esac
    113 fi
    114