openrc/net/iwconfig.sh.BSD.in
2008-04-20 14:24:35 +00:00

594 lines
12 KiB
Plaintext

# Copyright 2007-2008 Roy Marples <roy@marples.name>
# All rights reserved. Released under the 2-clause BSD license.
_config_vars="$_config_vars ssid mode associate_timeout preferred_aps"
_config_vars="$_config_vars blacklist_aps"
iwconfig_depend()
{
program /sbin/ifconfig
after plug
before interface
provide wireless
}
iwconfig_get_wep_status()
{
local status="disabled"
local mode=$(LC_ALL=C ifconfig "${IFACE}" \
| sed -n -e 's/^[[:space:]]*authmode \([^ ]*\) privacy ON .*/\1/p')
if [ -n "${mode}" ] ; then
status="enabled - ${mode}"
fi
echo "(WEP ${status})"
}
_iwconfig_get()
{
LC_ALL=C ifconfig "${IFACE}" | \
sed -n -e "s/^[[:space:]]*ssid \(.*\) channel \([0-9]*\).* bssid \(..:..:..:..:..:..\)\$/\\$1/p"
}
_get_ssid()
{
local ssid="$(_iwconfig_get 1)"
# If the ssid has a space then it's wrapped in quotes. This is a
# problem if the real ssid has a quote at the start or the end :/
ssid=${ssid#\"}
ssid=${ssid%\"}
echo "${ssid}"
}
_get_ap_mac_address()
{
_iwconfig_get 3
}
_get_channel()
{
_iwconfig_get 2
}
iwconfig_report()
{
local m="connected to"
local ssid="$(_get_ssid)"
local mac="$(_get_ap_mac_address "${iface}")"
[ -n "${mac}" ] && mac=" at ${mac}"
local wep_status="$(iwconfig_get_wep_status "${iface}")"
local channel="$(_get_channel)"
[ -n "${channel}" ] && channel="on channel ${channel} "
eindent
einfo "${IFACE} ${m} \"${ssid}\"${mac}"
einfo "${channel}${wep_status}"
eoutdent
}
iwconfig_get_wep_key()
{
local mac="$1" key=
[ -n "${mac}" ] && mac="$(echo "${mac}" | sed -e 's/://g')"
eval key=\$mac_key_${mac}
[ -z "${key}" ] && eval key=\$key_${SSIDVAR}
echo "${key:--}"
}
iwconfig_user_config()
{
local conf=
eval set -- \$ifconfig_${SSIDVAR}
for conf in "$@" ; do
ifconfig "${IFACE}" ${conf}
done
}
iwconfig_set_mode()
{
local x= opt= unopt="hostap adhoc"
case "$1" in
master|hostap) unopt="adhoc" opt="hostap" ;;
ad-hoc|adhoc) unopt="hostap" opt="adhoc" ;;
esac
for x in ${unopt} ; do
ifconfig "${IFACE}" -mediaopt ${x}
done
for x in ${opt} ; do
ifconfig "${IFACE}" mediaopt ${x}
done
}
iwconfig_setup_specific()
{
local mode="${1:-master}" channel=
if [ -z "${SSID}" ]; then
eerror "${IFACE} requires an SSID to be set to operate in ${mode} mode"
eerror "adjust the ssid_${IFVAR} setting in /etc/conf.d/net"
return 1
fi
iwconfig_set_mode "${mode}" || return 1
SSIDVAR=$(shell_var "${SSID}")
local key=$(iwconfig_get_wep_key)
# Now set the key
ifconfig "${IFACE}" wepkey "${key}"
ifconfig "${IFACE}" ssid "${SSID}" || return 1
eval channel=\$channel_${IFVAR}
# We default the channel to 3
ifconfig "${IFACE}" channel "${channel:-3}" || return 1
iwconfig_user_config
iwconfig_report "${iface}"
return 0
}
iwconfig_associate()
{
local mac="$1" channel="$2" caps="$3"
local mode= w="(WEP Disabled)" key=
SSIDVAR=$(shell_var "${SSID}")
key=$(iwconfig_get_wep_key "${mac}")
case "${caps}" in
[EI]P*)
if [ "${key}" = "-" ] ; then
ewarn "WEP key is not set for \"${SSID}\"; not connecting"
return 1
fi
;;
"") ;;
*)
if [ "${key}" != "-" ] ; then
key="-"
ewarn "\"${SSID}\" is not WEP enabled; ignoring setting"
fi
;;
esac
# Set mode accordingly
case "${caps}" in
*E*)
mode="managed"
if LC_ALL=C ifconfig "${IFACE}" | \
grep -q "^[[:space:]]*media: .*adhoc" ; then
ifconfig "${IFACE}" down -mediaopt adhoc up
fi
;;
*I*)
mode="adhoc"
if ! LC_ALL=C ifconfig "${IFACE}" | \
grep -q "^[[:space:]]*media: .*adhoc" ; then
ifconfig "${IFACE}" down mediaopt adhoc up
fi
;;
*)
if LC_ALL=C ifconfig "${IFACE}" \
| grep -q "^[[:space:]]*media: .*adhoc" ; then
mode="adhoc"
else
mode="managed"
fi
;;
esac
if [ "${key}" = "-" ] ; then
ifconfig "${IFACE}" wepmode off
else
ifconfig "${IFACE}" wepmode on
ifconfig "${IFACE}" deftxkey 1
w=$(iwconfig_get_wep_status)
fi
ebegin "Connecting to \"${SSID}\" in ${mode} mode ${w}"
if ! ifconfig "${IFACE}" wepkey "${key}" ; then
eerror "Invalid WEP key ${key}"
return 1
fi
ifconfig "${IFACE}" ssid "${SSID}" || return 1
iwconfig_user_config
if [ "${SSID}" != "any" ] && type preassociate >/dev/null 2>/dev/null ; then
veinfo "Running preassociate function"
veindent
( preassociate )
local e=$?
veoutdent
if [ ${e} -eq 0 ] ; then
veend 1 "preassociate \"${SSID}\" on ${IFACE} failed"
return 1
fi
fi
local timeout= i=0
eval timeout=\$associate_timeout_${IFVAR}
timeout=${timeout:-10}
[ ${timeout} -eq 0 ] \
&& vewarn "WARNING: infinite timeout set for association on ${IFACE}"
while true; do
_has_carrier && break
sleep 1
[ ${timeout} -eq 0 ] && continue
i=$((${i} + 1))
[ ${i} -ge ${timeout} ] && { eend 1; return 1; }
done
_has_carrier || { eend 1; return 1; }
eend 0
if [ "${SSID}" = "any" ]; then
SSID="$(_get_ssid)"
iwconfig_associate
return $?
fi
iwconfig_report
if type postassociate >/dev/null 2>/dev/null ; then
veinfo "Running postassociate function"
veindent
( postassociate )
veoutdent
fi
return 0
}
iwconfig_scan()
{
local x= i=0 scan= quality=
einfo "Scanning for access points"
eindent
scan="$(LC_ALL=C ifconfig -v "${IFACE}" list scan 2>/dev/null | sed -e "1 d" -e "s/$/'/g" -e "s/^/'/g")"
while [ ${i} -lt 3 -a -z "${scan}" ] ; do
scan="${scan}${scan:+ }$(LC_ALL=C ifconfig -v "${IFACE}" scan 2>/dev/null | sed -e "1 d" -e "s/$/'/g" -e "s/^/'/g")"
i=$((${i} + 1))
done
APS=-1
eval set -- ${scan}
for line in "$@" ; do
APS=$((${APS} + 1))
set -- ${line}
while true ; do
case "$1" in
*:*:*:*:*:*) break ;;
esac
eval SSID_${APS}="\"\${SSID_${APS}}\${SSID_${APS}:+ }$1\""
shift
done
eval MAC_${APS}="$(echo "$1" | tr '[:lower:]' '[:upper:]')"
eval CHAN_${APS}="$2"
quality=${4%:*}
shift ; shift ; shift ; shift ; shift
eval CAPS_${APS}="\"$*\""
# Add 1000 for managed nodes as we prefer them to adhoc
set -- $*
case "$1" in
*E*) eval QUAL_${APS}=$((${quality} + 1000)) ;;
*) eval QUAL_${APS}=\$quality ;;
esac
done
if [ -z "${MAC_0}" ]; then
ewarn "no access points found"
eoutdent
return 1
fi
# Sort based on quality
local i=0 k=1 a= b= x= t=
while [ ${i} -lt ${APS} ] ; do
k=$((${i} + 1))
while [ ${k} -le ${APS} ] ; do
eval a=\$QUALITY_${i}
[ -z "${a}" ] && break
eval b=\$QUALITY_${k}
if [ -n "${b}" -a "${a}" -lt "${b}" ] ; then
for x in MAC SSID CHAN QUALITY CAPS ; do
eval t=\$${x}_${i}
eval ${x}_${i}=\$${x}_${k}
eval ${x}_${k}=\$t
done
fi
k=$((${k} + 1))
done
i=$((${i} + 1))
done
# Strip any duplicates
local i=0 k=1 a= b=
while [ ${i} -lt ${APS} ] ; do
k=$((${i} + 1))
while [ ${k} -le ${APS} ] ; do
eval a=\$MAC_${i}
eval b=\$MAC_${k}
if [ "${a}" = "${b}" ] ; then
eval a=\$QUALITY_${i}
eval b=\$QUALITY_${k}
if [ -n "${a}" -a -n "${b}" ] ; then
if [ ${a} -ge ${b} ] ; then
unset MAC_${k} SSID_${k} CHAN_${k} QUALITY_${k} CAPS_${k}
else
unset MAC_${i} SSID_${i} CHAN_${i} QUALITY_${i} CAPS_${i}
fi
else
unset MAC_${k} SSID_${k} CHAN_${k} QUALITY_${k} CAPS_${k}
fi
fi
k=$((${k} + 1))
done
i=$((${i} + 1))
done
local i=0 e= m= s=
while [ ${i} -le ${APS} ] ; do
eval x=\$MAC_${i}
if [ -z "${x}" ] ; then
i=$((${i} + 1))
continue
fi
eval m=\$MODE_${i}
[ -n "${m}" ] && m=", ${m}"
eval s=\$SSID_${i}
eval q=\$QUALITY_${i}
eval e=\$CAPS_${i}
case "${e}" in
[EI]P*) e=", encrypted" ;;
*) e="" ;;
esac
if [ -z "${s}" ] ; then
einfo "Found ${x}${m}${e}"
else
einfo "Found \"${s}\" at ${x}${m}${e}"
fi
x="$(echo "${x}" | sed -e 's/://g')"
eval x=\$mac_ssid_${x}
if [ -n "${x}" ] ; then
eval SSID_${i}=\$x
s=${x}
eindent
einfo "mapping to \"${x}\""
eoutdent
fi
eval set -- $(_flatten_array "blacklist_aps_${IFVAR}")
[ $# = 0 ] && eval set -- $(_flatten_array "blacklist_aps")
for x; do
if [ "${x}" = "${s}" ] ; then
ewarn "${s} has been blacklisted - not connecting"
unset SSID_${i} MAC_${i} CHAN_${i} QUALITY_${i} CAPS_${i}
fi
done
i=$((${i} + 1))
done
eoutdent
return 0
}
iwconfig_force_preferred()
{
eval set -- $(_flatten_array "preferred_aps_${IFVAR}")
[ $# = 0 ] && eval set -- $(_flatten_array "preferred_aps")
[ $# = 0 ] && return 1
ewarn "Trying to force preferred in case they are hidden"
local ssid=
for ssid; do
local found_AP=false i=0 e=
while [ ${i} -le ${APS:--1} ] ; do
eval e=\$SSID_${i}
if [ "${e}" = "${ssid}" ] ; then
found_AP=true
break
fi
i=$((${i} + 1))
done
if ! ${found_AP} ; then
SSID=${ssid}
iwconfig_associate && return 0
fi
done
ewarn "Failed to associate with any preferred access points on ${IFACE}"
return 1
}
iwconfig_connect_preferred()
{
eval set -- $(_flatten_array "preferred_aps_${IFVAR}")
[ $# = 0 ] && eval set -- $(_flatten_array "preferred_aps")
[ $# = 0 ] && return 1
local ssid= i= mode= mac= caps= freq= chan=
for ssid; do
i=0
while [ ${i} -le ${APS} ] ; do
eval e=\$SSID_${i}
if [ "${e}" = "${ssid}" ] ; then
SSID=${e}
eval mac=\$MAC_${i}
eval caps=\$CAPS_${i}
eval freq=\$FREQ_${i}
eval chan=\$CHAN_${i}
iwconfig_associate "${mac}" \
"${chan}" "${caps}" && return 0
fi
i=$((${i} + 1))
done
done
return 1
}
iwconfig_connect_not_preferred()
{
local ssid= i=0 mode= mac= caps= freq= chan= pref=
while [ ${i} -le ${APS} ] ; do
eval e=\$SSID_${i}
if [ -z "${e}" ] ; then
i=$((${i} + 1))
continue
fi
eval set -- $(_flatten_array "preferred_aps_${IFVAR}")
[ $# = 0 ] && eval set -- $(_flatten_array "preferred_aps")
pref=false
for ssid; do
if [ "${e}" = "${ssid}" ] ; then
pref=true
break
fi
done
if ! ${pref} ; then
SSID=${e}
eval mac=\$MAC_${i}
eval caps=\$CAPS_${i}
eval freq=\$FREQ_${i}
eval chan=\$CHAN_${i}
iwconfig_associate "${mac}" \
"${chan}" "${caps}" && return 0
fi
i=$((${i} + 1))
done
return 1
}
iwconfig_defaults()
{
# Set some defaults
#ifconfig "${iface}" txpower 100 2>/dev/null
ifconfig "${IFACE}" bssid -
ifconfig "${IFACE}" ssid -
ifconfig "${IFACE}" wepkey 1:- wepkey 2:- wepkey 3:- wepkey 4:-
ifconfig "${IFACE}" authmode open
ifconfig "${IFACE}" -mediaopt adhoc
ifconfig "${IFACE}" -mediaopt hostap
}
iwconfig_configure()
{
local x= APS=-1
eval SSID=\$ssid_${IFVAR}
# Setup ad-hoc mode?
eval x=\$mode_${IFVAR}
x=${x:-managed}
case "${x}" in
ad-hoc|adhoc|hostap|master) iwconfig_setup_specific "${x}" ;;
esac
if [ "${x}" != "managed" -a "${x}" != "auto" -a "${x}" != "ad-hoc" -a "${x}" != "adhoc" -a ${x} != "master" ] ; then
eerror "Only managed, ad-hoc, master and auto modes are supported"
return 1
fi
# Has an SSID been forced?
if [ -n "${SSID}" ]; then
iwconfig_set_mode "${x}"
iwconfig_associate && return 0
[ "${SSID}" = "any" ] && iwconfig_force_preferred && return 0
eval SSID=\$adhoc_ssid_${IFVAR}
if [ -n "${SSID}" ]; then
iwconfig_setup_specific adhoc
return $?
fi
return 1
fi
# Are we forcing preferred only?
eval x=\$associate_order_${IFVAR}
[ -n "${x}" ] && associate_order=${x}
associate_order=${associate_order:-any}
if [ "${associate_order}" = "forcepreferredonly" ]; then
iwconfig_force_preferred && return 0
else
iwconfig_scan || return 1
iwconfig_connect_preferred && return 0
[ "${associate_order}" = "forcepreferred" ] || \
[ "${associate_order}" = "forceany" ] && \
iwconfig_force_preferred && return 0
[ "${associate_order}" = "any" ] || \
[ "${associate_order}" = "forceany" ] && \
iwconfig_connect_not_preferred && return 0
fi
e="associate with"
[ -z "${MAC_0}" ] && e="find"
[ "${preferred_aps}" = "force" ] || \
[ "${preferred_aps}" = "forceonly" ] && \
e="force"
e="Couldn't ${e} any access points on ${IFACE}"
eval SSID=\$adhoc_ssid_${IFVAR}
if [ -n "${SSID}" ]; then
ewarn "${e}"
iwconfig_setup_specific adhoc
return $?
fi
eerror "${e}"
return 1
}
iwconfig_pre_start()
{
# We don't configure wireless if we're being called from
# the background
yesno ${IN_BACKGROUND} && return 0
service_set_value "SSID" ""
_exists || return 0
if ! _is_wireless ; then
veinfo "${IFACE} is not wireless"
return 0
fi
iwconfig_defaults
iwconfig_user_config
# Set the base metric to be 2000
metric=2000
einfo "Configuring wireless network for ${IFACE}"
if iwconfig_configure ; then
service_set_value "SSID" "${SSID}"
return 0
fi
eerror "Failed to configure wireless for ${IFACE}"
iwconfig_defaults
#iwconfig "${IFACE}" txpower 0 2>/dev/null
unset SSID SSIDVAR
_down
return 1
}
iwconfig_post_stop()
{
yesno ${IN_BACKGROUND} && return 0
_is_wireless || return 0
iwconfig_defaults
#iwconfig "${IFACE}" txpower 0 2>/dev/null
}