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-rw-r--r--src/lib/8021x275
1 files changed, 275 insertions, 0 deletions
diff --git a/src/lib/8021x b/src/lib/8021x
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+++ b/src/lib/8021x
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+# Usage: wpa_call $interface $call ...
+# Wrapper around wpa_cli to deal with supplicant configurations that set a
+# non-standard control path.
+wpa_call()
+{
+ local args=("-i" "$1")
+ shift
+
+ if [[ -n "$WPA_CTRL_DIR" ]]; then
+ args+=("-p" "$WPA_CTRL_DIR")
+ elif [[ -n "$WPA_CONF" ]] && grep -q "^[[:space:]]*ctrl_interface=" "$WPA_CONF"; then
+ WPA_CTRL_DIR=$(grep -m 1 "^[[:space:]]*ctrl_interface=" "$WPA_CONF")
+ WPA_CTRL_DIR=${WPA_CTRL_DIR#*ctrl_interface=}
+ if [[ "$WPA_CTRL_DIR" == DIR=* ]]; then
+ WPA_CTRL_DIR=${WPA_CTRL_DIR:4}
+ WPA_CTRL_DIR=${WPA_CTRL_DIR%% GROUP=*}
+ fi
+ args+=("-p" "$WPA_CTRL_DIR")
+ fi
+ report_debug wpa_cli "${args[@]}" "$@"
+ wpa_cli "${args[@]}" "$@"
+}
+
+# Uses wpa_supplicant to check for association to a network
+# wpa_check interface [timeout]
+wpa_check()
+{
+ local timeout=0 INTERFACE="$1" TIMEOUT="${2:-15}" CONDITION="${3:-COMPLETED}"
+ # CONDITION is required as wired connections are ready at ASSOCIATED not COMPLETED FS#20150
+
+ while (( timeout < TIMEOUT )); do
+ ( # Sometimes wpa_supplicant isn't ready so silence errors for 2s only to avoid hiding real errors
+ if (( timeout < 2 )); then
+ eval $(wpa_call "$INTERFACE" status 2> /dev/null | grep -F "wpa_state=")
+ else
+ eval $(wpa_call "$INTERFACE" status | grep -F "wpa_state=")
+ fi
+ [[ "$wpa_state" = "$CONDITION" ]]
+ ) && return 0
+ sleep 1
+ (( ++timeout ))
+ done
+ echo "$wpa_state"
+ # wpa_cli -i "$INTERFACE" terminate >/dev/null 2>&1 # callers sometimes called stop_wpa, which does more but seems redundant
+ # termination should either be handled properly here, or by callers
+ stop_wpa "$INTERFACE"
+ return 1
+}
+
+start_wpa()
+{
+ local INTERFACE="$1" WPA_CONF="$2" WPA_DRIVER="$3"
+ shift 3
+ local WPA_OPTS="$@" PIDFILE="/run/wpa_supplicant_${INTERFACE}.pid"
+
+ if [[ -n "$WPA_CONF" ]]; then
+ WPA_CONF="-c$WPA_CONF"
+ else
+ WPA_CTRL_DIR="/run/wpa_supplicant"
+ WPA_CONF="-C$WPA_CTRL_DIR"
+ fi
+
+ wpa_supplicant -B -P "$PIDFILE" -i "$INTERFACE" -D "$WPA_DRIVER" "$WPA_CONF" $WPA_OPTS
+
+ # wait up to one second for the pid file to appear
+ timeout_wait 1 '[[ -f "$PIDFILE" ]]';
+ return $?
+}
+
+stop_wpa()
+{
+ local INTERFACE="$1"
+ # we need this as long as wpa_cli has a different default than netcfg
+ [[ -z "$WPA_CTRL_DIR" && -z "$WPA_CONF" ]] && WPA_CTRL_DIR="/run/wpa_supplicant"
+
+ # done if wpa_supplicant is already terminated for this interface
+ [[ -e "$WPA_CTRL_DIR/$INTERFACE" ]] || return
+
+ wpa_call "$INTERFACE" terminate > /dev/null
+
+ # wait up to one second for the pid file to be removed
+ timeout_wait 1 '[[ ! -f "/run/wpa_supplicant_${INTERFACE}.pid" ]]' || \
+ kill "$(< "/run/wpa_supplicant_${INTERFACE}.pid")" &> /dev/null &
+}
+
+wpa_reconfigure() {
+ wpa_call "$1" reconfigure > /dev/null
+ return $?
+}
+
+wpa_check_current_essid() {
+ # usage: wpa_check_current_essid $interface $essid
+ # check that wpa_supplicant is connected to the right essid
+ local INTERFACE=$1 ESSID=$2 status
+ status=$(wpa_call "$INTERFACE" status | grep "^ssid=")
+ if (( $? == 0 )) && [[ "$status" == "ssid=$ESSID" ]]; then
+ return 0
+ else
+ return 1
+ fi
+}
+
+wpa_find_essid() {
+ # usage: wpa_find_essid $INTERFACE $ESSID
+ # look for existence of a given essid. Assumes wpa_supplicant is
+ # running
+ result=$(wpa_supplicant_scan_and_find "$1" 5 "$2")
+ ret=$?
+ echo $result
+ report_debug wpa_find_essid "\"$result\""
+ return $ret
+}
+
+wpa_find_ap() {
+ # usage: wpa_find_essid $INTERFACE $ESSID
+ # look for existence of a given essid. Assumes wpa_supplicant is
+ # running
+ bssid=${2,,} # set to lowercase
+ result=$(wpa_supplicant_scan_and_find "$1" 1 "$bssid")
+ ret=$?
+ echo $result
+ report_debug wpa_find_ap "\"$result\""
+ return $ret
+}
+
+wpa_supplicant_scan_and_find() {
+ #usage: wpa_supplicant_scan_and_find $INTERFACE $FIELD $ITEM
+ # field = 1 for bssid, 5 for essid
+ # item = string to lookup
+ local INTERFACE="$1" FIELD="$2" ITEM="$3" RETRIES=5 scan_ok=0 try
+ for ((try=0; try < $RETRIES; try++)); do
+ local found
+ wpa_call "$INTERFACE" scan > /dev/null
+ sleep 2
+ found=$(wpa_call "$INTERFACE" scan_results | tail -n+2 | cut -f "$FIELD" | grep -F -x -m 1 -- "$ITEM")
+ (( $? == 0 )) && scan_ok=1
+
+ # ITEM has been found, echo it
+ if [[ -n "$found" ]]; then
+ echo "$found"
+ return 0
+ fi
+ done
+ if (( $scan_ok != 1 )); then
+ report_debug wpa_supplicant_scan_and_find "unable to retrieve scan results"
+ fi
+ return 1
+}
+
+wpa_supplicant_scan() {
+ local INTERFACE="$1" fields="$2" spawned_wpa=0 essids
+ # temp file used, as keeping ESSID's with spaces in their name in arrays
+ # is hard, obscure and kinda nasty. This is simpler and clearer.
+
+ [[ -z "$INTERFACE" ]] && return 1
+ essids=$(mktemp --tmpdir essid.XXXXXXXX)
+
+ if [[ "$(wpa_call "$INTERFACE" ping 2> /dev/null)" != "PONG" ]]; then
+ start_wpa "$INTERFACE" "" "${WPA_DRIVER:-nl80211,wext}" || return 1
+ spawned_wpa=1
+ fi
+
+ wpa_call "$INTERFACE" scan > /dev/null
+ # Wait at least 3 seconds for scan results
+ sleep 3
+ # Sometimes, that is not enough (FS#29946)
+ timeout_wait 7 '! wpa_call "$INTERFACE" status | grep -F -q "wpa_state=SCANNING"'
+ wpa_call "$INTERFACE" scan_results |
+ tail -n+2 |
+ sort -rn -k3 |
+ sort -u -k5 |
+ sort -rn -k3 |
+ cut -f"$fields" > "$essids"
+
+ # Fields are tab delimited
+ # Remove extraneous output from wpa_cli
+ # Sort by strength
+ # Remove duplicates
+ # Re-sort by strength as the removal disorders the list
+ # Cut to the AP/essid fields only
+
+ (( $spawned_wpa == 1 )) && stop_wpa "$INTERFACE"
+
+ # File of 0 length, ie. no ssid's.
+ if [[ ! -s "$essids" ]]; then
+ rm -f "$essids"
+ return 1
+ fi
+
+ echo "$essids"
+ return 0
+}
+
+# Requires already loaded profile
+make_wpa_config_file() {
+ local WPA_CONFD="$STATE_DIR/wpa.$1"
+
+ # make empty tmp dir with correct permissions, rename it
+ check_make_state_dir
+ mkdir -p /run/wpa_supplicant
+ rm -rf "$WPA_CONFD"
+ mv -f "$(mktemp -d --tmpdir=$STATE_DIR)" "$WPA_CONFD" || return 1
+ echo "ctrl_interface=/run/wpa_supplicant" >> "$WPA_CONFD/wpa.conf"
+ echo "ctrl_interface_group=${WPA_GROUP:-wheel}" >> "$WPA_CONFD/wpa.conf"
+ [[ $WPA_COUNTRY ]] && echo "country=$WPA_COUNTRY" >> "$WPA_CONFD/wpa.conf"
+ [[ -n "$ADHOC" ]] && echo "ap_scan=2" >> "$WPA_CONFD/wpa.conf"
+ echo "$WPA_CONFD/wpa.conf"
+}
+
+# Requires already loaded profile
+make_wpa_config() {
+ case $SECURITY in
+ none|wep|wpa)
+ case "${ESSID_TYPE:-ascii}" in
+ ascii)
+ echo "ssid=\"$ESSID\""
+ ;;
+ hex)
+ # Hex ESSID is written unquoted and in lowercase (FS#24333)
+ echo "ssid=${ESSID,,}"
+ ;;
+ *)
+ report_fail "ESSID_TYPE must be set to 'ascii' or 'hex'."
+ return 1
+ ;;
+ esac
+ if [[ -n "$AP" ]]; then
+ echo "bssid=${AP,,}"
+ fi
+ [[ -n "$ADHOC" ]] && echo "mode=1"
+ ;;
+ wpa-configsection)
+ echo "$CONFIGSECTION"
+ ;;
+ *)
+ return 1
+ ;;
+ esac
+
+ # Key management
+ case $SECURITY in
+ none)
+ echo "key_mgmt=NONE"
+ ;;
+ wep)
+ echo "key_mgmt=NONE"
+ echo "wep_tx_keyidx=0"
+ if [[ ${KEY:0:2} == "s:" ]]; then # TODO: does wpa_supplicant handle this as expected?
+ echo "wep_key0=\"${KEY:2}\""
+ else
+ echo "wep_key0=$KEY"
+ fi
+ ;;
+ wpa)
+ echo "proto=RSN WPA"
+ if [[ "${#KEY}" -eq 64 ]]; then
+ echo "psk=$KEY"
+ else
+ echo "psk=\"$KEY\""
+ fi
+ ;;
+ esac
+
+ # Hidden SSID
+ if checkyesno ${HIDDEN:-no}; then
+ echo "scan_ssid=1"
+ fi
+
+ # Priority group for the network
+ if [[ -n "$PRIORITY" ]]; then
+ echo "priority=$PRIORITY"
+ fi
+}
+
+# vim: ft=sh ts=4 et sw=4 tw=0:
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-11-21 18:54:45 +0100