diff options
Diffstat (limited to 'src/wireless.subr')
| -rw-r--r-- | src/wireless.subr | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/wireless.subr b/src/wireless.subr new file mode 100644 index 0000000..5b9bd57 --- /dev/null +++ b/src/wireless.subr @@ -0,0 +1,204 @@ +#! /bin/bash + +# Uses wpa_supplicant to check for association to a network +# wpa_check interface [timeout] +wpa_check() +{ + INTERFACE=$1; TIMEOUT=$2 + + [ -z $TIMEOUT ] && TIMEOUT=15 + let timeout=0 + while [ $timeout -ne $TIMEOUT ]; do + eval `wpa_cli status|grep wpa_state` + [ "$wpa_state" = "COMPLETED" ] && return 0 + sleep 1 + let timeout++ + done + + wpa_cli terminate >/dev/null 2>&1 + err "Wireless association failed." + return 1 +} + +# Uses wireless_tools, to check for association to a network. +# wep_check interface [timeout] +wep_check() +{ + INTERFACE=$1; TIMEOUT=$2 + + [ -z $TIMEOUT ] && TIMEOUT=15 + let timeout=0 + while [ $timeout -ne $TIMEOUT ]; do + bssid=`iwgetid $INTERFACE -ra` + [ ! "$bssid" = "00:00:00:00:00:00" ] && return 0 + sleep 1 + let timeout++ + done + + err "Wireless association failed." + return 1 +} + +# Check if a particular network is within range +# find_essid interface essid +find_essid() +{ + INTERFACE=$1; ESSID=$2; RETRIES=4 + try=0; + while [ $try -ne $RETRIES ]; do + if iwlist $INTERFACE scan|sed "s/ESSID://g"|grep -q "\"$ESSID\""; then + return 0 # network found + fi + sleep 0.5 + let try++ + done + return 1 +} + +# Return a filename containing a list of network ESSID's found. +# list_networks interface +list_networks() +{ + # 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 "$1" ]] && return 1 + essids=$(mktemp /tmp/essid.XXXXX) + + let try 0; + while [[ $try -ne $RETRIES ]]; do + iwlist $1 scan 2> /dev/null|grep ESSID|sed 's/.*ESSID:"\([^"]\+\)".*/\1/' > $essids + sleep 0.5; let try++ + done + sort -u $essids -o $essids + + # File of 0 length, ie. no ssid's. + if [[ ! -s $essids ]]; then + return 1 + fi + + echo $essids + return 0 +} + +start_wpa() +{ + INTERFACE=$1; WPA_CONF=$2; WPA_OPTS=$3 + + [ "$WPA_OPTS" == "" ] && WPA_OPTS="-Dwext" + + wpa_supplicant -wB -P/var/run/wpa_supplicant_${INTERFACE}.pid -i${INTERFACE} -c $WPA_CONF $WPA_OPTS + sleep 1 + + if [ ! -f /var/run/wpa_supplicant_${INTERFACE}.pid ]; then + err "wpa_supplicant did not start, possible configuration error" + return 1 + fi +} + +wireless_up() { + + load_profile $1 + + if [ ! -d /sys/class/net/$INTERFACE/wireless ]; then + err "Interface $INTERFACE is not a wireless interface" + return 1 + fi + + # Was required by broadcom + # iwlist $INTERFACE scan &> /dev/null + + # Required by atheros to enable device + ifconfig $INTERFACE up + + # Required by ipw3945 to properly re-associate + eval "iwconfig $INTERFACE mode managed essid \"$ESSID\"" + + # Kill any lingering wpa_supplicants. + if [ -f /var/run/wpa_supplicant_$INTERFACE.pid ]; then + kill $(cat /var/run/wpa_supplicant_$INTERFACE.pid) + fi + + if checkyesno $SCAN; then + if ! find_essid $INTERFACE "$ESSID"; then + err "Network unavailable" + return 1 + fi + fi + + case $SECURITY in + wep|none) + # 'none' security uses iwconfig, like wep, so use same code, minus keysetting. + # Use sane default if no alternative is specified + if [ "$SECURITY" = "wep" -a "$WEP_OPTS" = "" ]; then + WEP_OPTS="mode managed essid \"$ESSID\" key open $KEY" + elif [ "$SECURITY" = "none" -a "$WEP_OPTS" = "" ]; then + WEP_OPTS="mode managed essid \"$ESSID\"" + fi + + if ! eval iwconfig $INTERFACE $WEP_OPTS; then + err "Could not set wireless configuration" + return 1 + fi + + wep_check $INTERFACE $TIMEOUT|| return 1 + ;; + wpa) + local WPA_CONF=`mktemp /tmp/wpa.XXXXXXXX` + + # Temporary bugfix for broken drivers... http://bbs.archlinux.org/viewtopic.php?id=36384 + if ! eval iwconfig $INTERFACE mode managed essid "\"$ESSID\""; then + err "Could not set wireless configuration" + return 1 + fi + + # Create a random file to store configuration, make it root only. + chmod 600 $WPA_CONF + echo "ctrl_interface=/var/run/wpa_supplicant" >> $WPA_CONF + echo "ctrl_interface_group=0" >> $WPA_CONF + + # Generate configuration + if ! wpa_passphrase "$ESSID" "$KEY" >> $WPA_CONF; then + err "Configuration generation failed: `cat $WPA_CONF`" + return 1 + fi + + # Connect! + start_wpa $INTERFACE $WPA_CONF $WPA_OPTS || return 1 + wpa_check $INTERFACE $TIMEOUT || return 1 + ;; + wpa-config) + # If user hasnt defined one, use stock config. + [ -z "$WPA_CONF" ] && WPA_CONF="/etc/wpa_supplicant.conf" + start_wpa $INTERFACE $WPA_CONF $WPA_OPTS || return 1 + wpa_check $INTERFACE $TIMEOUT || return 1 + ;; + esac + + . $SUBR_DIR/ethernet.subr + if ! ethernet_up $1; then + wireless_down $1 YES + return 1 + fi +} + +wireless_down() { + PROFILE=$1 NOETHERNETDOWN=$2 + if ! checkyesno $2; then + . $SUBR_DIR/ethernet.subr + ethernet_down $1 + fi + wpa_cli terminate &> /dev/null + iwconfig $INTERFACE essid off key off &> /dev/null + ifconfig $INTERFACE down +} + +wireless_clean_scope() { + unset INTERFACE CONNECTION + unset TIMEOUT WPA_CONF WPA_OPTS KEY ESSID SECURITY WEP_OPTS + . $SUBR_DIR/ethernet.subr + ethernet_clean_scope +} + + +# vim: set ts=4 et sw=4: |