555 lines
12 KiB
Bash
555 lines
12 KiB
Bash
# Copyright 2004-2007 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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_config_vars="$_config_vars essid mode associate_timeout preferred_aps blacklist_aps"
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iwconfig_depend() {
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program /sbin/ifconfig
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after plug
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before interface
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provide wireless
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}
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iwconfig_get_wep_status() {
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local status="disabled"
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local mode=$(LC_ALL=C ifconfig "${IFACE}" \
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| sed -n -e 's/^[[:space:]]*authmode \([^ ]*\) privacy ON .*/\1/p')
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if [ -n "${mode}" ] ; then
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status="enabled - ${mode}"
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fi
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echo "(WEP ${status})"
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}
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_iwconfig_get() {
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LC_ALL=C ifconfig "${IFACE}" | \
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sed -n -e 's/^[[:space:]]*ssid \(.*\) channel \([0-9]*\) bssid \(..:..:..:..:..:..\)$/\'"$1"'/p'
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}
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_get_ssid() {
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_iwconfig_get 1
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}
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_get_ap_mac_address() {
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_iwconfig_get 3
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}
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_get_channel() {
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_iwconfig_get 2
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}
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iwconfig_report() {
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local m="connected to"
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local ssid=$(_get_ssid)
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local mac=$(_get_ap_mac_address "${iface}")
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[ -n "${mac}" ] && mac=" at ${mac}"
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local wep_status="$(iwconfig_get_wep_status "${iface}")"
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local channel=$(_get_channel)
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[ -n "${channel}" ] && channel="on channel ${channel} "
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eindent
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einfo "${IFACE} ${m} \"${ssid}\"${mac}"
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einfo "${channel}${wep_status}"
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eoutdent
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}
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iwconfig_get_wep_key() {
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local mac="$1" key=
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[ -n "${mac}" ] && mac="$(echo "${mac}" | sed -e 's/://g')"
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eval key=\$mac_key_${mac}
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[ -z "${key}" ] && eval key=\$key_${SSIDVAR}
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echo "${key:--}"
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}
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iwconfig_user_config() {
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local conf=
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eval set -- \$ifconfig_${SSIDVAR}
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for conf in "$@" ; do
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ifconfig "${IFACE}" ${conf}
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done
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}
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iwconfig_set_mode() {
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local x= opt= unopt="hostap adhoc"
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case "${mode}" in
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master|hostap) unopt="adhoc" opt="hostap" ;;
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ad-hoc|adhoc) unopt="hostap" opt="adhoc" ;;
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esac
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for x in ${unopt} ; do
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ifconfig "${IFACE}" -mediaopt ${x}
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done
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for x in ${opt} ; do
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ifconfig "${IFACE}" mediaopt ${x}
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done
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}
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iwconfig_setup_specific() {
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local mode="${1:-master}" channel=
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if [ -z "${SSID}" ]; then
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eerror "${IFACE} requires an SSID to be set to operate in ${mode} mode"
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eerror "adjust the ssid_${IFVAR} setting in /etc/conf.d/net"
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return 1
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fi
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iwconfig_set_mode "${mode}" || return 1
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SSIDVAR=$(_shell_var "${SSID}")
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local key=$(iwconfig_get_wep_key)
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# Now set the key
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ifconfig "${IFACE}" wepkey ${key}
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ifconfig "${IFACE}" ssid "${ESSID}" || return 1
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eval channel=\$channel_${IFVAR}
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# We default the channel to 3
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ifconfig "${IFACE}" channel "${channel:-3}" || return 1
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iwconfig_user_config
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iwconfig_report "${iface}"
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return 0
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}
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iwconfig_associate() {
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local mac="$1" channel="$2" caps="$3"
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local mode= w="(WEP Disabled)" key=
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SSIDVAR=$(_shell_var "${SSID}")
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key=$(iwconfig_get_wep_key "${mac}")
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case "${caps}" in
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[EI]P*)
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if [ "${key}" = "-" ] ; then
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ewarn "WEP key is not set for \"${SSID}\"; not connecting"
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return 1
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fi
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;;
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"") ;;
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*)
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if [ "${key}" != "-" ] ; then
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key="-"
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ewarn "\"${ESSID}\" is not WEP enabled; ignoring setting"
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fi
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;;
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esac
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# Set mode accordingly
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case "${caps}" in
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*E*) mode="managed"; ifconfig "${IFACE}" -mediaopt adhoc ;;
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*I*) mode="adhoc"; ifconfig "${IFACE}" mediaopt adhoc ;;
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*)
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if LC_ALL=C ifconfig "${IFACE}" | grep -q "^[[:space:]]*media: .*adhoc" ; then
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mode="adhoc"
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else
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mode="managed"
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fi
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;;
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esac
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if [ "${key}" = "-" ] ; then
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ifconfig "${IFACE}" wepmode off
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else
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ifconfig "${IFACE}" wepmode on
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ifconfig "${IFACE}" deftxkey 1
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w=$(iwconfig_get_wep_status)
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fi
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ebegin "Connecting to \"${SSID}\" in ${mode} mode ${w}"
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if ! ifconfig "${IFACE}" wepkey ${key} ; then
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eerror "Invalid WEP key ${key}"
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return 1
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fi
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ifconfig "${IFACE}" ssid "${SSID}" || return 1
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iwconfig_user_config
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if [ "${SSID}" != "any" ] && type preassociate >/dev/null 2>/dev/null ; then
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veinfo "Running preassociate function"
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veindent
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( preassociate )
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local e=$?
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veoutdent
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if [ ${e} -eq 0 ] ; then
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veend 1 "preassociate \"${SSID}\" on ${IFACE} failed"
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return 1
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fi
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fi
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local timeout= i=0
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eval timeout=\$associate_timeout_${IFVAR}
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timeout=${timeout:-10}
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[ ${timeout} -eq 0 ] \
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&& vewarn "WARNING: infinite timeout set for association on ${IFACE}"
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while true; do
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_has_carrier && break
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sleep 1
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[ ${timeout} -eq 0 ] && continue
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i=$((${i} + 1))
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[ ${i} -ge ${timeout} ] && return 1
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done
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if ! _has_carrier ; then
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eend 1
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return 1
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fi
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eend 0
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if [ "${SSID}" = "any" ]; then
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SSID="$(_get_ssid)"
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iwconfig_associate
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return $?
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fi
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iwconfig_report
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if type postassociate >/dev/null 2>/dev/null ; then
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veinfo "Running postassociate function"
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veindent
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( postassociate )
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veoutdent
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fi
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return 0
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}
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iwconfig_scan() {
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local x= i=0 scan= quality=
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einfo "Scanning for access points"
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eindent
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scan="$(LC_ALL=C ifconfig -v "${IFACE}" list scan 2>/dev/null | sed -e "1 d" -e "s/$/'/g" -e "s/^/'/g")"
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while [ ${i} -lt 3 -o -z "${scan}" ] ; do
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scan="${scan}${scan:+ }$(LC_ALL=C ifconfig -v "${IFACE}" scan 2>/dev/null | sed -e "1 d" -e "s/$/'/g" -e "s/^/'/g")"
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i=$((${i} + 1))
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done
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local OIFS=$IFS
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APS=-1
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eval set -- ${scan}
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for line in "$@" ; do
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APS=$((${APS} + 1))
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set -- ${line}
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while true ; do
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case "$1" in
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*:*:*:*:*:*) break ;;
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esac
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eval SSID_${APS}="\"\${SSID_${APS}}\${SSID_${APS}:+ }$1\""
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shift
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done
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eval MAC_${APS}="$(echo "$1" | tr '[:lower:]' '[:upper:]')"
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eval CHAN_${APS}=$2
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quality=${4%:*}
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shift ; shift ; shift ; shift ; shift
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eval CAPS_${APS}=$*
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# Add 1000 for managed nodes as we prefer them to adhoc
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set -- $*
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case "$1" in
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*E*) eval QUAL_${APS}=$((${quality} + 1000)) ;;
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*) eval QUAL_${APS}=\$quality ;;
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esac
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done
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if [ -z "${MAC_0}" ]; then
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ewarn "no access points found"
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eoutdent
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return 1
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fi
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# Sort based on quality
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local i=0 k=1 a= b= x= t=
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while [ ${i} -lt ${APS} ] ; do
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k=$((${i} + 1))
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while [ ${k} -le ${APS} ] ; do
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eval a=\$QUALITY_${i}
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[ -z "${a}" ] && break
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eval b=\$QUALITY_${k}
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if [ -n "${b}" -a "${a}" -lt "${b}" ] ; then
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for x in MAC SSID CHAN QUALITY CAPS ; do
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eval t=\$${x}_${i}
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eval ${x}_${i}=\$${x}_${k}
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eval ${x}_${k}=\$t
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done
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fi
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k=$((${k} + 1))
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done
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i=$((${i} + 1))
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done
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# Strip any duplicates
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local i=0 k=1 a= b=
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while [ ${i} -lt ${APS} ] ; do
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k=$((${i} + 1))
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while [ ${k} -le ${APS} ] ; do
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eval a=\$MAC_${i}
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eval b=\$MAC_${k}
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if [ "${a}" = "${b}" ] ; then
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eval a=\$QUALITY_${i}
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eval b=\$QUALITY_${k}
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if [ -n "${a}" -a -n "${b}" ] ; then
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if [ ${a} -ge ${b} ] ; then
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unset MAC_${k} SSID_${k} CHAN_${k} QUALITY_${k} CAPS_${k}
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else
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unset MAC_${i} SSID_${i} CHAN_${i} QUALITY_${i} CAPS_${i}
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fi
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else
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unset MAC_${k} SSID_${k} CHAN_${k} QUALITY_${k} CAPS_${k}
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fi
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fi
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k=$((${k} + 1))
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done
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i=$((${i} + 1))
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done
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local i=0 e= m= black= s=
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eval "$(_get_array "blacklist_aps")"
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black="$@"
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while [ ${i} -le ${APS} ] ; do
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eval x=\$MAC_${i}
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if [ -z "${x}" ] ; then
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i=$((${i} + 1))
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continue
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fi
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eval m=\$MODE_${i}
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[ -n "${m}" ] && m=", ${m}"
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eval s=\$SSID_${i}
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eval q=\$QUALITY_${i}
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eval e=\$CAPS_${i}
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case "${e}" in
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[EI]P*) e=", encrypted" ;;
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*) e="" ;;
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esac
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if [ -z "${s}" ] ; then
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einfo "Found ${x}${m}${e}"
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else
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einfo "Found \"${s}\" at ${x}${m}${e}"
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fi
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x="$(echo "${x}" | sed -e 's/://g')"
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eval x=\$mac_ssid_${x}
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if [ -n "${x}" ] ; then
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eval SSID_${i}=\$x
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s=${x}
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eindent
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einfo "mapping to \"${x}\""
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eoutdent
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fi
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eval "$(_get_array "blacklist_aps")"
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for x in "$@" ; do
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if [ "${x}" = "${s}" ] ; then
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ewarn "${s} has been blacklisted - not connecting"
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unset SSID_${i} MAC_${i} CHAN_${i} QUALITY_${i} CAPS_${i}
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fi
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done
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i=$((${i} + 1))
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done
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eoutdent
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return 0
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}
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iwconfig_force_preferred() {
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[ -z "${preferred_aps}" ] && return 1
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ewarn "Trying to force preferred in case they are hidden"
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eval "(_get_array "preferred_aps")"
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local ssid=
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for ssid in "$@"; do
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local found_AP=false i=0 e=
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while [ ${i} -le ${APS} ] ; do
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eval e=\$SSID_${i}
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if [ "${e}" = "${ssid}" ] ; then
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found_AP=true
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break
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fi
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i=$((${i} + 1))
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done
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if ! ${found_AP} ; then
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SSID=${e}
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iwconfig_associate && return 0
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fi
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done
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ewarn "Failed to associate with any preferred access points on ${IFACE}"
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return 1
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}
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iwconfig_connect_preferred() {
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local essid= i=0 mode= mac= caps= freq= chan=
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eval "$(_get_array preferred_aps)"
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for essid in "$@"; do
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while [ ${i} -le ${APS} ] ; do
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eval e=\$SSID_${i}
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if [ "${e}" = "${essid}" ] ; then
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SSID=${e}
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eval mac=\$MAC_${i}
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eval caps=\$CAPS_${i}
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eval freq=\$FREQ_${i}
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eval chan=\$CHAN_${i}
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iwconfig_associate "${mac}" \
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"${chan}" "${caps}" && return 0
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fi
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i=$((${i} + 1))
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done
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done
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return 1
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}
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iwconfig_connect_not_preferred() {
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local essid= i=0 mode= mac= caps= freq= chan= pref=
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while [ ${i} -le ${APS} ] ; do
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eval e=\$SSID_${i}
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if [ -z "${e}" ] ; then
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i=$((${i} + 1))
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continue
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fi
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eval "$(_get_array preferred_aps)"
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pref=false
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for essid in "$@" ; do
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if [ "${e}" = "${essid}" ] ; then
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pref=true
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break
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fi
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done
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if ! ${pref} ; then
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SSID=${e}
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eval mac=\$MAC_${i}
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eval caps=\$CAPS_${i}
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eval freq=\$FREQ_${i}
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eval chan=\$CHAN_${i}
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iwconfig_associate "${mac}" \
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"${chan}" "${caps}" && return 0
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fi
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i=$((${i} + 1))
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done
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return 1
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}
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iwconfig_defaults() {
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# Set some defaults
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#ifconfig "${iface}" txpower 100 2>/dev/null
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ifconfig "${IFACE}" bssid -
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ifconfig "${IFACE}" ssid -
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ifconfig "${IFACE}" authmode open
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ifconfig "${IFACE}" -mediaopt adhoc
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ifconfig "${IFACE}" -mediaopt hostap
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}
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iwconfig_configure() {
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local x APS
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eval SSID=\$ssid_${IFVAR}
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# Setup ad-hoc mode?
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eval x=\$mode_${IFVAR}
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x=${x:-managed}
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case "${x}" in
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ad-hoc|adhoc|hostap|master) iwconfig_setup_specific "${x}" ;;
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esac
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if [ "${x}" != "managed" -a "${x}" != "auto" ] ; then
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eerror "Only managed, ad-hoc, master and auto modes are supported"
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return 1
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fi
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# Has an ESSID been forced?
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if [ -n "${SSID}" ]; then
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iwconfig_set_mode "${x}"
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iwconfig_associate && return 0
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[ "${SSID}" = "any" ] && iwconfig_force_preferred && return 0
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eval SSID=\$adhoc_ssid_${IFVAR}
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if [ -n "${SSID}" ]; then
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iwconfig_setup_specific adhoc
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return $?
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fi
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return 1
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fi
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# Are we forcing preferred only?
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eval x=\$associate_order_${IFVAR}
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[ -n "${x}" ] && associate_order=${x}
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associate_order=${associate_order:-any}
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if [ "${associate_order}" = "forcepreferredonly" ]; then
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iwconfig_force_preferred && return 0
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else
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iwconfig_scan || return 1
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iwconfig_connect_preferred && return 0
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[ "${associate_order}" = "forcepreferred" ] || \
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[ "${associate_order}" = "forceany" ] && \
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iwconfig_force_preferred && return 0
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[ "${associate_order}" = "any" ] || \
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[ "${associate_order}" = "forceany" ] && \
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iwconfig_connect_not_preferred && return 0
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fi
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e="associate with"
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[ -z "${MAC_0}" ] && e="find"
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[ "${preferred_aps}" = "force" ] || \
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[ "${preferred_aps}" = "forceonly" ] && \
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e="force"
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e="Couldn't ${e} any access points on ${IFACE}"
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eval SSID=\$adhoc_ssid_${IFVAR}
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if [ -n "${SSID}" ]; then
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ewarn "${e}"
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iwconfig_setup_specific adhoc
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return $?
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fi
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eerror "${e}"
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return 1
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}
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iwconfig_pre_start() {
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# We don't configure wireless if we're being called from
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# the background
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${IN_BACKGROUND} && return 0
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save_options "SSID" ""
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_exists || return 0
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if ! _is_wireless ; then
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veinfo "${IFACE} is not wireless"
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return 0
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fi
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iwconfig_defaults
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iwconfig_user_config
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# Set the base metric to be 2000
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metric=2000
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einfo "Configuring wireless network for ${IFACE}"
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if iwconfig_configure ; then
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save_options "ESSID" "${ESSID}"
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return 0
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fi
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eerror "Failed to configure wireless for ${IFACE}"
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iwconfig_defaults
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#iwconfig "${IFACE}" txpower 0 2>/dev/null
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unset SSID SSIDVAR
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_down
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return 1
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}
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iwconfig_post_stop() {
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${IN_BACKGROUND} && return 0
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_is_wireless || return 0
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iwconfig_defaults
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#iwconfig "${IFACE}" txpower 0 2>/dev/null
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}
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# vim: set ts=4
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