die on failure
This commit is contained in:
oblique
parent
eebf018b6c
commit
e8fd319aac
117
create_ap
117
create_ap
@ -92,10 +92,6 @@ networkmanager_rm_unmanaged() {
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sleep 2
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}
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ARGS=$(getopt -o hc:w:g:dnm: -l "help","hidden" -n $(basename $0) -- "$@")
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[[ $? -ne 0 ]] && exit 1
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eval set -- "$ARGS"
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CHANNEL=1
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GATEWAY=192.168.12.1
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WPA_VERSION=1+2
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@ -103,6 +99,51 @@ ETC_HOSTS=0
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HIDDEN=0
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SHARE_METHOD=nat
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CONFDIR=
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VWIFI_IFACE=
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INTERNET_IFACE=
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BRIDGE_IFACE=
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OLD_IP_FORWARD=
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cleanup() {
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echo
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echo "Doing cleanup..."
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# exiting
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for x in $CONFDIR/*.pid; do
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# even if the $CONFDIR is empty, the for loop will assign
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# a value in $x. so we need to check if the value is a file
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[[ -f $x ]] && kill -9 $(cat $x)
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done
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rm -rf $CONFDIR
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if [[ "$SHARE_METHOD" != "none" ]]; then
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if [[ "$SHARE_METHOD" == "nat" ]]; then
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iptables -t nat -D POSTROUTING -o ${INTERNET_IFACE} -j MASQUERADE
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iptables -D FORWARD -i ${VWIFI_IFACE} -j ACCEPT
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echo $OLD_IP_FORWARD > /proc/sys/net/ipv4/ip_forward
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elif [[ "$SHARE_METHOD" == "bridge" ]]; then
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ip link set down $BRIDGE_IFACE
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brctl delbr $BRIDGE_IFACE
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fi
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fi
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ip link set down dev ${VWIFI_IFACE}
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ip addr flush ${VWIFI_IFACE}
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networkmanager_rm_unmanaged ${VWIFI_IFACE}
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iw dev ${VWIFI_IFACE} del
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}
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die() {
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[[ -n "$1" ]] && echo -e "\nERROR: $1\n"
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cleanup
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exit 1
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}
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ARGS=$(getopt -o hc:w:g:dnm: -l "help","hidden" -n $(basename $0) -- "$@")
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[[ $? -ne 0 ]] && exit 1
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eval set -- "$ARGS"
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while :; do
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case "$1" in
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-h|--help)
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@ -166,12 +207,16 @@ if [[ "$SHARE_METHOD" != "nat" && "$SHARE_METHOD" != "bridge" && "$SHARE_METHOD"
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fi
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WIFI_IFACE=$1
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VWIFI_IFACE=${WIFI_IFACE}ap
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if [[ "$SHARE_METHOD" == "bridge" ]]; then
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BRIDGE_IFACE=$(get_avail_bridge)
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if [[ -z $BRIDGE_IFACE ]]; then
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echo "ERROR: No availabe bridges < br100"
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exit 1
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fi
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elif [[ "$SHARE_METHOD" == "nat" ]]; then
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OLD_IP_FORWARD=$(cat /proc/sys/net/ipv4/ip_forward)
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fi
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if [[ "$SHARE_METHOD" != "none" ]]; then
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@ -224,21 +269,19 @@ else
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fi
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fi
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CONFDIR=$(mktemp -d /tmp/create_ap.${WIFI_IFACE}.conf.XXXXXXXX)
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echo "Config dir: $CONFDIR"
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echo -n "Creating a virtual WiFi interface... "
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VWIFI_IFACE=${WIFI_IFACE}ap
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iw dev ${VWIFI_IFACE} del > /dev/null 2>&1
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if iw dev ${WIFI_IFACE} interface add ${VWIFI_IFACE} type __ap; then
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echo "${VWIFI_IFACE} created."
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else
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echo "FAILED!"
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exit 1
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die "Failed to create a virtual WiFi interface from ${WIFI_IFACE}."
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fi
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networkmanager_add_unmanaged ${VWIFI_IFACE}
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CONFDIR=$(mktemp -d /tmp/create_ap.${WIFI_IFACE}.conf.XXXXXXXX)
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echo "Config dir: $CONFDIR"
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[[ $HIDDEN -eq 1 ]] && echo "Access Point's SSID is hidden!"
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# hostapd config
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@ -279,25 +322,24 @@ EOF
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fi
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# initialize WiFi interface
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ip link set down dev ${VWIFI_IFACE}
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ip addr flush ${VWIFI_IFACE}
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ip link set down dev ${VWIFI_IFACE} || die
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ip addr flush ${VWIFI_IFACE} || die
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if [[ "$SHARE_METHOD" != "bridge" ]]; then
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ip link set up dev ${VWIFI_IFACE}
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ip addr add ${GATEWAY}/24 dev ${VWIFI_IFACE}
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ip link set up dev ${VWIFI_IFACE} || die
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ip addr add ${GATEWAY}/24 dev ${VWIFI_IFACE} || die
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fi
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# enable Internet sharing
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if [[ "$SHARE_METHOD" != "none" ]]; then
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echo "Sharing Internet using method: $SHARE_METHOD"
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if [[ "$SHARE_METHOD" == "nat" ]]; then
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iptables -t nat -A POSTROUTING -o ${INTERNET_IFACE} -j MASQUERADE
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iptables -A FORWARD -i ${VWIFI_IFACE} -j ACCEPT
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OLD_IP_FORWARD=$(cat /proc/sys/net/ipv4/ip_forward)
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echo 1 > /proc/sys/net/ipv4/ip_forward
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iptables -t nat -A POSTROUTING -o ${INTERNET_IFACE} -j MASQUERADE || die
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iptables -A FORWARD -i ${VWIFI_IFACE} -j ACCEPT || die
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echo 1 > /proc/sys/net/ipv4/ip_forward || die
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elif [[ "$SHARE_METHOD" == "bridge" ]]; then
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brctl addbr ${BRIDGE_IFACE}
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brctl addif ${BRIDGE_IFACE} ${INTERNET_IFACE}
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dhclient -pf $CONFDIR/dhclient.pid ${BRIDGE_IFACE}
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brctl addbr ${BRIDGE_IFACE} || die
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brctl addif ${BRIDGE_IFACE} ${INTERNET_IFACE} || die
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dhclient -pf $CONFDIR/dhclient.pid ${BRIDGE_IFACE} || die
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fi
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else
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echo "No Internet sharing"
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@ -312,39 +354,12 @@ fi
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# start dns + dhcp server
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if [[ "$SHARE_METHOD" != "bridge" ]]; then
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dnsmasq -C $CONFDIR/dnsmasq.conf -x $CONFDIR/dnsmasq.pid
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dnsmasq -C $CONFDIR/dnsmasq.conf -x $CONFDIR/dnsmasq.pid || die
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fi
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# start access point
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echo "hostapd command-line interface: hostapd_cli -p $CONFDIR/hostapd_ctrl"
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hostapd $CONFDIR/hostapd.conf || {
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echo
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echo "Hostapd failed to run, maybe a program is interfering."
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echo
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}
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hostapd $CONFDIR/hostapd.conf || die "Failed to run hostapd, maybe a program is interfering."
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echo
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echo "Doing cleanup..."
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# exiting
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for x in $CONFDIR/*.pid; do
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# even if the $CONFDIR is empty, the for loop will assign
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# a value in $x. so we need to check if the value is a file
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[[ -f $x ]] && kill -9 $(cat $x)
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done
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rm -rf $CONFDIR
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if [[ "$SHARE_METHOD" != "none" ]]; then
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if [[ "$SHARE_METHOD" == "nat" ]]; then
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iptables -t nat -D POSTROUTING -o ${INTERNET_IFACE} -j MASQUERADE
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iptables -D FORWARD -i ${VWIFI_IFACE} -j ACCEPT
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echo $OLD_IP_FORWARD > /proc/sys/net/ipv4/ip_forward
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elif [[ "$SHARE_METHOD" == "bridge" ]]; then
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ip link set down $BRIDGE_IFACE
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brctl delbr $BRIDGE_IFACE
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fi
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fi
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ip link set down dev ${VWIFI_IFACE}
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ip addr flush ${VWIFI_IFACE}
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networkmanager_rm_unmanaged ${VWIFI_IFACE}
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iw dev ${VWIFI_IFACE} del
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cleanup
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exit 0
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