Revision 2b9e52e1 kvm-vif-bridge
| b/kvm-vif-bridge | ||
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MAC2EUI64=/usr/bin/mac2eui64 |
| 8 | 8 |
NFDHCPD_STATE_DIR=/var/lib/nfdhcpd |
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function clear_routed_setup_ipv4 {
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arptables -D OUTPUT -o $INTERFACE --opcode request -j mangle |
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while ip rule del dev $INTERFACE; do :; done |
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iptables -D FORWARD -i $INTERFACE -p udp --dport 67 -j DROP |
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function clear_tap {
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}
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arptables -D OUTPUT -o $INTERFACE --opcode request -j mangle >/dev/null 2>&1 |
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while ip rule del dev $INTERFACE; do :; done >/dev/null 2>&1 |
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iptables -D FORWARD -i $INTERFACE -p udp --dport 67 -j DROP > /dev/null 2>&1 |
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function clear_routed_setup_ipv6 {
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while ip -6 rule del dev $INTERFACE; do :; done |
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} |
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function clear_routed_setup_firewall {
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for oldchain in protected unprotected limited; do |
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iptables -D FORWARD -o $INTERFACE -j $oldchain |
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ip6tables -D FORWARD -o $INTERFACE -j $oldchain |
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done |
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} |
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function clear_ebtables {
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TAP=$INTERFACE |
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FROM=FROM${TAP^^}
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TO=TO${TAP^^}
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ebtables -D INPUT -i $TAP -j $FROM |
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ebtables -D FORWARD -i $TAP -j $FROM |
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ebtables -D FORWARD -o $TAP -j $TO |
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ebtables -D OUTPUT -o $TAP -j $TO |
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ebtables -X $FROM |
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ebtables -X $TO |
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} |
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function routed_setup_ipv4 {
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# mangle ARPs to come from the gw's IP |
| ... | ... | |
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eui64=$($MAC2EUI64 $MAC $prefix) |
| 41 | 70 |
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while ip -6 rule del dev $INTERFACE; do :; done > /dev/null 2>&1 |
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ip -6 rule add dev $INTERFACE table $TABLE |
| 45 | 73 |
ip -6 ro replace $eui64/128 dev $INTERFACE table $TABLE |
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ip -6 neigh add proxy $eui64 dev $uplink > /dev/null 2>&1
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ip -6 neigh add proxy $eui64 dev $uplink |
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# disable proxy NDP since we're handling this on userspace |
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# this should be the default, but better safe than sorry |
| ... | ... | |
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esac |
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done |
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# Flush any old rules. We have to consider all chains, since |
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# we are not sure the instance was on the same chain, or had the same |
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# tap interface. |
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for oldchain in protected unprotected limited; do |
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iptables -D FORWARD -o $INTERFACE -j $oldchain 2>/dev/null |
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ip6tables -D FORWARD -o $INTERFACE -j $oldchain 2>/dev/null |
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done |
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if [ "x$chain" != "x" ]; then |
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iptables -A FORWARD -o $INTERFACE -j $chain |
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ip6tables -A FORWARD -o $INTERFACE -j $chain |
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fi |
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} |
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function setup_nfdhcpd {
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umask 022 |
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FILE=$NFDHCPD_STATE_DIR/$INTERFACE |
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#IFACE is the interface from which the packet seems to arrive |
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#needed in bridged mode where the packets seems to arrive from the |
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#bridge and not from the tap |
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cat >$FILE <<EOF |
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INDEV=$1 |
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IP=$IP |
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MAC=$MAC |
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HOSTNAME=$INSTANCE |
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TAGS="$TAGS" |
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EOF |
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if [ -n "$GATEWAY" ]; then |
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echo GATEWAY=$GATEWAY >> $FILE |
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fi |
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if [ -n "$SUBNET" ]; then |
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echo SUBNET=$SUBNET >> $FILE |
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fi |
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if [ -n "$GATEWAY6" ]; then |
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echo GATEWAY6=$GATEWAY6 >> $FILE |
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fi |
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if [ -n "$SUBNET6" ]; then |
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echo SUBNET6=$SUBNET6 >> $FILE |
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eui64=$($MAC2EUI64 $MAC $SUBNET6) |
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echo EUI64=$eui64 >> $FILE |
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fi |
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} |
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function clear_ebtables {
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TAP=$INTERFACE |
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FROM=FROM${TAP^^}
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TO=TO${TAP^^}
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exist=$(ebtables -L | grep $TAP) |
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if [ ! -z "$exist" ]; then |
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ebtables -D INPUT -i $TAP -j $FROM > /dev/null 2>&1 |
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ebtables -D FORWARD -i $TAP -j $FROM > /dev/null 2>&1 |
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ebtables -D FORWARD -o $TAP -j $TO > /dev/null 2>&1 |
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ebtables -D OUTPUT -o $TAP -j $TO > /dev/null 2>&1 |
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ebtables -X $FROM > /dev/null 2>&1 |
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ebtables -X $TO > /dev/null 2>&1 |
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fi |
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} |
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function setup_ebtables {
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TAP=$INTERFACE |
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FROM=FROM${TAP^^}
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| ... | ... | |
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ebtables -N $FROM |
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# do not allow changes in ip-mac pair |
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ebtables -A $FROM --ip-source \! $IP -p ipv4 -j DROP |
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if [ -n "$IP"]; then |
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ebtables -A $FROM --ip-source \! $IP -p ipv4 -j DROP |
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fi |
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ebtables -A $FROM -s \! $MAC -j DROP |
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ebtables -A FORWARD -i $TAP -j $FROM |
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ebtables -N $TO |
| ... | ... | |
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} |
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function setup_nfdhcpd {
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umask 022 |
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FILE=$NFDHCPD_STATE_DIR/$INTERFACE |
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#IFACE is the interface from which the packet seems to arrive |
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#needed in bridged mode where the packets seems to arrive from the |
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#bridge and not from the tap |
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cat >$FILE <<EOF |
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INDEV=$1 |
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IP=$IP |
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MAC=$MAC |
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HOSTNAME=$INSTANCE |
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TAGS="$TAGS" |
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GATEWAY=$GATEWAY |
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SUBNET=$SUBNET |
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GATEWAY6=$GATEWAY6 |
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SUBNET6=$SUBNET6 |
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EUI64=$($MAC2EUI64 $MAC $SUBNET6 2>/dev/null) |
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EOF |
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} |
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DEFAULT=/etc/default/snf-network |
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source $DEFAULT |
| ... | ... | |
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source $NETFILE |
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fi |
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TABLE=rt_$NETWORK |
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clear_routed_setup_ipv4 > /dev/null 2>&1 |
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clear_routed_setup_ipv6 > /dev/null 2>&1 |
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clear_routed_setup_firewall > /dev/null 2>&1 |
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clear_ebtables > /dev/null 2>&1 |
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if [ "$MODE" = "routed" ]; then |
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TABLE=rt_$NETWORK |
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# special proxy-ARP/NDP routing mode |
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clear_tap > /dev/null 2>&1 |
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clear_ebtables >/dev/null 2>&1 |
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# use a constant predefined MAC address for the tap |
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ip link set $INTERFACE addr $TAP_CONSTANT_MAC |
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# bring the tap up |
| ... | ... | |
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routed_setup_ipv4 > /dev/null 2>&1 |
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routed_setup_ipv6 > /dev/null 2>&1 |
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routed_setup_firewall |
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routed_setup_firewall > /dev/null 2>&1
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setup_nfdhcpd $INTERFACE |
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elif [ "$MODE" = "bridged" ]; then |
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clear_tap > /dev/null 2>&1 |
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clear_ebtables >/dev/null 2>&1 |
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ifconfig $INTERFACE 0.0.0.0 up |
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brctl addif $BRIDGE $INTERFACE |
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setup_nfdhcpd $BRIDGE |
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setup_ebtables |
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setup_ebtables > /dev/null 2>&1
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fi |
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