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delete bridge method

This commit is contained in:
garywill 2018-08-31 18:41:06 +08:00
parent 6fbd865345
commit 8d75d7324e
1 changed files with 45 additions and 167 deletions
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154
create_ap
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@ -38,7 +38,6 @@ usage() {
echo " the <interface-with-internet> argument)"
echo " -m <method> Method for Internet sharing."
echo " Use: 'nat' for NAT (default)"
echo " 'bridge' for bridging"
echo " 'none' for no Internet sharing (equivalent to -n)"
echo " --psk Use 64 hex digits pre-shared-key instead of passphrase"
echo " --hidden Make the Access Point hidden (do not broadcast the SSID)"
@ -84,8 +83,6 @@ usage() {
echo " * If you're not using the --no-virt option, then you can create an AP with the same"
echo " interface you are getting your Internet connection."
echo " * You can pass your SSID and password through pipe or through arguments (see examples)."
echo " * On bridge method if the <interface-with-internet> is not a bridge interface, then"
echo " a bridge interface is created automatically."
echo
echo "Examples:"
echo " "$PROGNAME" wlan0 eth0 MyAccessPoint MyPassPhrase"
@ -94,8 +91,6 @@ usage() {
echo " echo 'MyAccessPoint' | "$PROGNAME" wlan0 eth0"
echo " "$PROGNAME" wlan0 wlan0 MyAccessPoint MyPassPhrase"
echo " "$PROGNAME" -n wlan0 MyAccessPoint MyPassPhrase"
echo " "$PROGNAME" -m bridge wlan0 eth0 MyAccessPoint MyPassPhrase"
echo " "$PROGNAME" -m bridge wlan0 br0 MyAccessPoint MyPassPhrase"
echo " "$PROGNAME" --driver rtl871xdrv wlan0 eth0 MyAccessPoint MyPassPhrase"
echo " "$PROGNAME" --daemon wlan0 eth0 MyAccessPoint MyPassPhrase"
echo " "$PROGNAME" --stop wlan0"
@ -241,10 +236,7 @@ is_wifi_interface() {
return 1
}
is_bridge_interface() {
[[ -z "$1" ]] && return 1
[[ -d "/sys/class/net/${1}/bridge" ]]
}
get_phy_device() {
local x
@ -651,7 +643,6 @@ CONFDIR=
WIFI_IFACE=
VWIFI_IFACE=
INTERNET_IFACE=
BRIDGE_IFACE=
OLD_MACADDR=
IP_ADDRS=
ROUTE_ADDRS=
@ -720,46 +711,10 @@ _cleanup() {
iptables -w -t nat -D POSTROUTING -s ${GATEWAY%.*}.0/24 ! -o ${WIFI_IFACE} -j MASQUERADE
iptables -w -D FORWARD -i ${WIFI_IFACE} -s ${GATEWAY%.*}.0/24 -j ACCEPT
iptables -w -D FORWARD -i ${INTERNET_IFACE} -d ${GATEWAY%.*}.0/24 -j ACCEPT
elif [[ "$SHARE_METHOD" == "bridge" ]]; then
if ! is_bridge_interface $INTERNET_IFACE; then
ip link set dev $BRIDGE_IFACE down
ip link set dev $INTERNET_IFACE down
ip link set dev $INTERNET_IFACE promisc off
ip link set dev $INTERNET_IFACE nomaster
ip link delete $BRIDGE_IFACE type bridge
ip addr flush $INTERNET_IFACE
ip link set dev $INTERNET_IFACE up
dealloc_iface $BRIDGE_IFACE
for x in "${IP_ADDRS[@]}"; do
x="${x/inet/}"
x="${x/secondary/}"
x="${x/dynamic/}"
x=$(echo $x | sed 's/\([0-9]\)sec/\1/g')
x="${x/${INTERNET_IFACE}/}"
ip addr add $x dev $INTERNET_IFACE
done
ip route flush dev $INTERNET_IFACE
for x in "${ROUTE_ADDRS[@]}"; do
[[ -z "$x" ]] && continue
[[ "$x" == default* ]] && continue
ip route add $x dev $INTERNET_IFACE
done
for x in "${ROUTE_ADDRS[@]}"; do
[[ -z "$x" ]] && continue
[[ "$x" != default* ]] && continue
ip route add $x dev $INTERNET_IFACE
done
networkmanager_rm_unmanaged_if_needed $INTERNET_IFACE
fi
fi
fi
if [[ "$SHARE_METHOD" != "bridge" ]]; then
if [[ $NO_DNS -eq 0 ]]; then
iptables -w -D INPUT -i ${WIFI_IFACE} -p tcp -m tcp --dport $DNS_PORT -j ACCEPT
iptables -w -D INPUT -i ${WIFI_IFACE} -p udp -m udp --dport $DNS_PORT -j ACCEPT
@ -769,7 +724,7 @@ _cleanup() {
-p udp -m udp --dport 53 -j REDIRECT --to-ports $DNS_PORT
fi
iptables -w -D INPUT -i ${WIFI_IFACE} -p udp -m udp --dport 67 -j ACCEPT
fi
if [[ $NO_VIRT -eq 0 ]]; then
if [[ -n "$VWIFI_IFACE" ]]; then
@ -1350,7 +1305,7 @@ if [[ $(get_adapter_kernel_module ${WIFI_IFACE}) =~ ^(8192[cd][ue]|8723a[sue])$
fi
fi
if [[ "$SHARE_METHOD" != "nat" && "$SHARE_METHOD" != "bridge" && "$SHARE_METHOD" != "none" ]]; then
if [[ "$SHARE_METHOD" != "nat" && "$SHARE_METHOD" != "none" ]]; then
echo "ERROR: Wrong Internet sharing method" >&2
echo
usage >&2
@ -1503,13 +1458,7 @@ if [[ -e /proc/sys/net/bridge/bridge-nf-call-iptables ]]; then
fi
mutex_unlock
if [[ "$SHARE_METHOD" == "bridge" ]]; then
if is_bridge_interface $INTERNET_IFACE; then
BRIDGE_IFACE=$INTERNET_IFACE
else
BRIDGE_IFACE=$(alloc_new_iface br)
fi
fi
if [[ $USE_IWCONFIG -eq 0 ]]; then
iw dev ${WIFI_IFACE} set power_save off
@ -1662,9 +1611,7 @@ rsn_pairwise=CCMP
EOF
fi
if [[ "$SHARE_METHOD" == "bridge" ]]; then
echo "bridge=${BRIDGE_IFACE}" >> $CONFDIR/hostapd.conf
elif [[ $NO_DNSMASQ -eq 0 ]]; then
if [[ $NO_DNSMASQ -eq 0 ]]; then
# dnsmasq config (dhcp + dns)
DNSMASQ_VER=$(dnsmasq -v | grep -m1 -oE '[0-9]+(\.[0-9]+)*\.[0-9]+')
version_cmp $DNSMASQ_VER 2.63
@ -1706,10 +1653,10 @@ if [[ $NO_VIRT -eq 1 && -n "$NEW_MACADDR" ]]; then
ip link set dev ${WIFI_IFACE} address ${NEW_MACADDR} || die
fi
if [[ "$SHARE_METHOD" != "bridge" ]]; then
ip link set up dev ${WIFI_IFACE} || die "$VIRTDIEMSG"
ip addr add ${GATEWAY}/24 broadcast ${GATEWAY%.*}.255 dev ${WIFI_IFACE} || die "$VIRTDIEMSG"
fi
ip link set up dev ${WIFI_IFACE} || die "$VIRTDIEMSG"
ip addr add ${GATEWAY}/24 broadcast ${GATEWAY%.*}.255 dev ${WIFI_IFACE} || die "$VIRTDIEMSG"
# enable Internet sharing
if [[ "$SHARE_METHOD" != "none" ]]; then
@ -1723,83 +1670,14 @@ if [[ "$SHARE_METHOD" != "none" ]]; then
# to enable clients to establish PPTP connections we must
# load nf_nat_pptp module
modprobe nf_nat_pptp > /dev/null 2>&1
elif [[ "$SHARE_METHOD" == "bridge" ]]; then
# disable iptables rules for bridged interfaces
if [[ -e /proc/sys/net/bridge/bridge-nf-call-iptables ]]; then
echo 0 > /proc/sys/net/bridge/bridge-nf-call-iptables
fi
# to initialize the bridge interface correctly we need to do the following:
#
# 1) save the IPs and route table of INTERNET_IFACE
# 2) if NetworkManager is running set INTERNET_IFACE as unmanaged
# 3) create BRIDGE_IFACE and attach INTERNET_IFACE to it
# 4) set the previously saved IPs and route table to BRIDGE_IFACE
#
# we need the above because BRIDGE_IFACE is the master interface from now on
# and it must know where is connected, otherwise connection is lost.
if ! is_bridge_interface $INTERNET_IFACE; then
echo -n "Create a bridge interface... "
OLD_IFS="$IFS"
IFS=$'\n'
IP_ADDRS=( $(ip addr show $INTERNET_IFACE | grep -A 1 -E 'inet[[:blank:]]' | paste - -) )
ROUTE_ADDRS=( $(ip route show dev $INTERNET_IFACE) )
IFS="$OLD_IFS"
if networkmanager_is_running; then
networkmanager_add_unmanaged $INTERNET_IFACE
networkmanager_wait_until_unmanaged $INTERNET_IFACE
fi
# create bridge interface
ip link add name $BRIDGE_IFACE type bridge || die
ip link set dev $BRIDGE_IFACE up || die
# set 0ms forward delay
echo 0 > /sys/class/net/$BRIDGE_IFACE/bridge/forward_delay
# attach internet interface to bridge interface
ip link set dev $INTERNET_IFACE promisc on || die
ip link set dev $INTERNET_IFACE up || die
ip link set dev $INTERNET_IFACE master $BRIDGE_IFACE || die
ip addr flush $INTERNET_IFACE
for x in "${IP_ADDRS[@]}"; do
x="${x/inet/}"
x="${x/secondary/}"
x="${x/dynamic/}"
x=$(echo $x | sed 's/\([0-9]\)sec/\1/g')
x="${x/${INTERNET_IFACE}/}"
ip addr add $x dev $BRIDGE_IFACE || die
done
# remove any existing entries that were added from 'ip addr add'
ip route flush dev $INTERNET_IFACE
ip route flush dev $BRIDGE_IFACE
# we must first add the entries that specify the subnets and then the
# gateway entry, otherwise 'ip addr add' will return an error
for x in "${ROUTE_ADDRS[@]}"; do
[[ "$x" == default* ]] && continue
ip route add $x dev $BRIDGE_IFACE || die
done
for x in "${ROUTE_ADDRS[@]}"; do
[[ "$x" != default* ]] && continue
ip route add $x dev $BRIDGE_IFACE || die
done
echo "$BRIDGE_IFACE created."
fi
fi
else
echo "No Internet sharing"
fi
# start dhcp + dns (optional)
if [[ "$SHARE_METHOD" != "bridge" ]]; then
if [[ $NO_DNS -eq 0 ]]; then
if [[ $NO_DNS -eq 0 ]]; then
DNS_PORT=5353
iptables -w -I INPUT -i ${WIFI_IFACE} -p tcp -m tcp --dport $DNS_PORT -j ACCEPT || die
iptables -w -I INPUT -i ${WIFI_IFACE} -p udp -m udp --dport $DNS_PORT -j ACCEPT || die
@ -1807,11 +1685,11 @@ if [[ "$SHARE_METHOD" != "bridge" ]]; then
-p tcp -m tcp --dport 53 -j REDIRECT --to-ports $DNS_PORT || die
iptables -w -t nat -I PREROUTING -s ${GATEWAY%.*}.0/24 -d ${GATEWAY} \
-p udp -m udp --dport 53 -j REDIRECT --to-ports $DNS_PORT || die
else
else
DNS_PORT=0
fi
fi
if [[ $NO_DNSMASQ -eq 0 ]]; then
if [[ $NO_DNSMASQ -eq 0 ]]; then
iptables -w -I INPUT -i ${WIFI_IFACE} -p udp -m udp --dport 67 -j ACCEPT || die
if which complain > /dev/null 2>&1; then
@ -1823,9 +1701,9 @@ if [[ "$SHARE_METHOD" != "bridge" ]]; then
umask 0033
dnsmasq -d -C $CONFDIR/dnsmasq.conf -x $CONFDIR/dnsmasq.pid -l $CONFDIR/dnsmasq.leases -p $DNS_PORT || die &
umask $SCRIPT_UMASK
fi
fi
# start access point
echo "hostapd command-line interface: hostapd_cli -p $CONFDIR/hostapd_ctrl"