Reimplementation of 6a3e1d98
commit
With the 6a3e1d98
commit NetworkManager was throwing an assertion so
we take a different approach when we create the bridge interface.
Also if the <interface-with-internet> is already a bridge interface
we skip creation.
The new approach is:
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 add INTERNET_IFACE to it
4) Set the previously saved IPs and route table to BRIDGE_IFACE
Better fix #19
This commit is contained in:
parent
14ec50f379
commit
81d861cb46
@ -54,6 +54,9 @@
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### Bridged Internet sharing:
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create_ap -m bridge wlan0 eth0 MyAccessPoint MyPassPhrase
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### Bridged Internet sharing (pre-configured bridge interface):
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create_ap -m bridge wlan0 br0 MyAccessPoint MyPassPhrase
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### Internet sharing from the same WiFi interface:
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create_ap wlan0 wlan0 MyAccessPoint MyPassPhrase
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164
create_ap
164
create_ap
@ -43,6 +43,8 @@ usage() {
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echo " * If you're not using the --no-virt option, then you can create an AP with the same"
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echo " interface you are getting your Internet connection."
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echo " * You can pass your SSID and password through pipe or through arguments (see examples)."
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echo " * On bridge method if the <interface-with-internet> is not a bridge interface, then"
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echo " a bridge interface is created automatically."
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echo
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echo "Examples:"
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echo " $(basename $0) wlan0 eth0 MyAccessPoint MyPassPhrase"
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@ -52,6 +54,7 @@ usage() {
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echo " $(basename $0) wlan0 wlan0 MyAccessPoint MyPassPhrase"
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echo " $(basename $0) -n wlan0 MyAccessPoint MyPassPhrase"
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echo " $(basename $0) -m bridge wlan0 eth0 MyAccessPoint MyPassPhrase"
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echo " $(basename $0) -m bridge wlan0 br0 MyAccessPoint MyPassPhrase"
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echo " $(basename $0) --driver rtl871xdrv wlan0 eth0 MyAccessPoint MyPassPhrase"
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}
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@ -88,6 +91,10 @@ is_wifi_interface() {
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return 1
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}
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is_bridge_interface() {
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brctl show | cut -f1 | grep -E "^$1\$" > /dev/null 2>&1
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}
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get_phy_device() {
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for x in /sys/class/ieee80211/*; do
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[[ ! -d "$x" ]] && continue
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@ -160,9 +167,8 @@ get_macaddr() {
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get_avail_bridge() {
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for i in {0..100}; do
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curr_bridge=$(brctl show | grep "br$i" | cut -s -f1)
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if [[ -z $curr_bridge ]]; then
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echo "br$i"
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if ! is_bridge_interface "br${i}"; then
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echo "br${i}"
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return
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fi
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done
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@ -177,7 +183,6 @@ get_new_macaddr() {
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echo $NEWMAC
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}
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ADDED_UNMANAGED=0
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NETWORKMANAGER_CONF=/etc/NetworkManager/NetworkManager.conf
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NM_OLDER_VERSION=1
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@ -323,6 +328,8 @@ BRIDGE_IFACE=
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OLD_IP_FORWARD=
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OLD_BRIDGE_IPTABLES=
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OLD_MACADDR=
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IP_ADDRS=
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ROUTE_ADDRS=
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cleanup() {
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trap "" SIGINT
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@ -345,19 +352,39 @@ cleanup() {
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iptables -D FORWARD -i ${INTERNET_IFACE} -d ${GATEWAY%.*}.0/24 -j ACCEPT > /dev/null 2>&1
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[[ -n $OLD_IP_FORWARD ]] && echo $OLD_IP_FORWARD > /proc/sys/net/ipv4/ip_forward
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elif [[ "$SHARE_METHOD" == "bridge" ]]; then
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ip route show dev $BRIDGE_IFACE | grep -v -E '^default' | while read x; do
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ip route del $x dev $BRIDGE_IFACE
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ip route add $x dev $INTERNET_IFACE
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done
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if [[ -n $OLD_BRIDGE_IPTABLES ]]; then
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echo $OLD_BRIDGE_IPTABLES > /proc/sys/net/bridge/bridge-nf-call-iptables
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fi
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ip route show dev $BRIDGE_IFACE | grep -E '^default' | while read x; do
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ip route del $x dev $BRIDGE_IFACE
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ip route add $x dev $INTERNET_IFACE
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done
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if ! is_bridge_interface $INTERNET_IFACE; then
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ip link set down $BRIDGE_IFACE
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brctl delbr $BRIDGE_IFACE
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ip addr flush $INTERNET_IFACE
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ip link set dev $INTERNET_IFACE up
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ip link set down $BRIDGE_IFACE
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brctl delbr $BRIDGE_IFACE
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[[ -n $OLD_BRIDGE_IPTABLES ]] && echo $OLD_BRIDGE_IPTABLES > /proc/sys/net/bridge/bridge-nf-call-iptables
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for x in "${IP_ADDRS[@]}"; do
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x="${x/inet/}"
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x="${x/secondary/}"
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x="${x/dynamic/}"
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x=$(echo $x | sed 's/\([0-9]\)sec/\1/g')
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x="${x/${INTERNET_IFACE}/}"
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ip addr add $x dev $INTERNET_IFACE
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done
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ip route flush dev $INTERNET_IFACE
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for x in "${ROUTE_ADDRS[@]}"; do
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[[ "$x" == default* ]] && continue
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ip route add $x dev $INTERNET_IFACE
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done
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for x in "${ROUTE_ADDRS[@]}"; do
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[[ "$x" != default* ]] && continue
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ip route add $x dev $INTERNET_IFACE
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done
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networkmanager_rm_unmanaged_if_needed $INTERNET_IFACE
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fi
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fi
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fi
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@ -501,17 +528,6 @@ if [[ "$SHARE_METHOD" != "nat" && "$SHARE_METHOD" != "bridge" && "$SHARE_METHOD"
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exit 1
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fi
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if [[ "$SHARE_METHOD" == "bridge" ]]; then
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OLD_BRIDGE_IPTABLES=$(cat /proc/sys/net/bridge/bridge-nf-call-iptables)
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BRIDGE_IFACE=$(get_avail_bridge)
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if [[ -z $BRIDGE_IFACE ]]; then
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echo "ERROR: No availabe bridges < br100" >&2
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exit 1
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fi
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elif [[ "$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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MIN_REQUIRED_ARGS=2
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else
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@ -562,6 +578,23 @@ else
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fi
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fi
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if [[ "$SHARE_METHOD" == "bridge" ]]; then
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OLD_BRIDGE_IPTABLES=$(cat /proc/sys/net/bridge/bridge-nf-call-iptables)
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if is_bridge_interface $INTERNET_IFACE; then
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BRIDGE_IFACE=$INTERNET_IFACE
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else
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BRIDGE_IFACE=$(get_avail_bridge)
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fi
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if [[ -z $BRIDGE_IFACE ]]; then
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echo "ERROR: No availabe bridges < br100" >&2
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exit 1
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fi
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elif [[ "$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 [[ $NO_VIRT -eq 1 && "$WIFI_IFACE" == "$INTERNET_IFACE" ]]; then
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echo -n "ERROR: You can not share your connection from the same" >&2
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echo " interface if you are using --no-virt option." >&2
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@ -693,48 +726,65 @@ if [[ "$SHARE_METHOD" != "none" ]]; then
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elif [[ "$SHARE_METHOD" == "bridge" ]]; then
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# disable iptables rules for bridged interfaces
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echo 0 > /proc/sys/net/bridge/bridge-nf-call-iptables || die
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# create and initialize bridged interface
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brctl addbr ${BRIDGE_IFACE} || die
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brctl addif ${BRIDGE_IFACE} ${INTERNET_IFACE} || die
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# to initialize the bridge interface correctly we need to do the following:
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#
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# 1) duplicate the IPs of INTERNET_IFACE to BRIDGE_IFACE
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# 2) duplicate routing table of INTERNET_IFACE to BRIDGE_IFACE
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# 3) delete routing table of INTERNET_IFACE
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# NOTE: we don't need to delete the IPs of INTERNET_IFACE
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# 1) save the IPs and route table of INTERNET_IFACE
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# 2) if NetworkManager is running set INTERNET_IFACE as unmanaged
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# 3) create BRIDGE_IFACE and add INTERNET_IFACE to it
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# 4) set the previously saved IPs and route table to BRIDGE_IFACE
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#
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# we need the above because BRIDGE_IFACE is the master interface from now on
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# and it must know where is connected, otherwise connection is lost.
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ip link set dev ${BRIDGE_IFACE} up || die
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if ! is_bridge_interface $INTERNET_IFACE; then
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echo -n "Create a bridge interface... "
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OLD_IFS="$IFS"
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IFS=$'\n'
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ip addr show $INTERNET_IFACE | grep -E '[[:blank:]]+inet ' | while read x; do
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IPADDR=$(echo $x | sed 's/inet \([^ ]*\).*/\1/')
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BRDADDR=
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if [[ $x == *\ brd\ * ]]; then
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BRDADDR=$(echo $x | sed 's/.* brd \([^ ]*\).*/\1/')
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IP_ADDRS=( $(ip addr show $INTERNET_IFACE | grep -A 1 -E 'inet[[:blank:]]' | paste - -) )
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ROUTE_ADDRS=( $(ip route show dev $INTERNET_IFACE) )
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IFS="$OLD_IFS"
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if networkmanager_is_running; then
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networkmanager_add_unmanaged $INTERNET_IFACE
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networkmanager_wait_until_unmanaged $INTERNET_IFACE
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fi
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if [[ -n "$BRDADDR" ]]; then
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ip addr add $IPADDR broadcast $BRDADDR dev $BRIDGE_IFACE || die
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else
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ip addr add $IPADDR dev $BRIDGE_IFACE || die
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fi
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done
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# remove any existing entries that were added from 'ip addr add'
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ip route flush dev $BRIDGE_IFACE || die
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brctl addbr $BRIDGE_IFACE || die
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brctl setfd $BRIDGE_IFACE 0
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brctl addif $BRIDGE_IFACE $INTERNET_IFACE || die
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ip link set dev $BRIDGE_IFACE up || die
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ip link set dev $INTERNET_IFACE up || die
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# we must first add the entries that specify the subnets and then the
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# gateway entry, otherwise 'ip addr add' will return an error
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ip route show dev $INTERNET_IFACE | grep -v -E '^default' | while read x; do
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ip route del $x dev $INTERNET_IFACE || die
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ip route add $x dev $BRIDGE_IFACE || die
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done
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ip addr flush $INTERNET_IFACE
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for x in "${IP_ADDRS[@]}"; do
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x="${x/inet/}"
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x="${x/secondary/}"
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x="${x/dynamic/}"
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x=$(echo $x | sed 's/\([0-9]\)sec/\1/g')
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x="${x/${INTERNET_IFACE}/}"
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ip addr add $x dev $BRIDGE_IFACE || die
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done
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ip route show dev $INTERNET_IFACE | grep -E '^default' | while read x; do
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ip route del $x dev $INTERNET_IFACE || die
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ip route add $x dev $BRIDGE_IFACE || die
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done
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# remove any existing entries that were added from 'ip addr add'
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ip route flush dev $INTERNET_IFACE
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ip route flush dev $BRIDGE_IFACE
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# we must first add the entries that specify the subnets and then the
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# gateway entry, otherwise 'ip addr add' will return an error
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for x in "${ROUTE_ADDRS[@]}"; do
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[[ "$x" == default* ]] && continue
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ip route add $x dev $BRIDGE_IFACE || die
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done
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for x in "${ROUTE_ADDRS[@]}"; do
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[[ "$x" != default* ]] && continue
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ip route add $x dev $BRIDGE_IFACE || die
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done
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echo "$BRIDGE_IFACE created."
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fi
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fi
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else
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echo "No Internet sharing"
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