# This is an example of a Ganeti kvm ifup script that configures network
# interfaces based on the initial deployment of the Okeanos project
-TAP_CONSTANT_MAC=cc:47:52:4e:45:54 # GRNET in hex :-)
-MAC2EUI64=/usr/bin/mac2eui64
-NFDHCPD_STATE_DIR=/var/lib/nfdhcpd
+source /etc/default/snf-network
+source /usr/lib/snf-network/common.sh
+FROM=FROM${INTERFACE^^}
+TO=TO${INTERFACE^^}
-
-function clear_tap {
-
- arptables -D OUTPUT -o $INTERFACE --opcode request -j mangle >/dev/null 2>&1
- while ip rule del dev $INTERFACE; do :; done
- iptables -D FORWARD -i $INTERFACE -p udp --dport 67 -j DROP 2>/dev/null
-
-
-}
-
-function routed_setup_ipv4 {
-
- # mangle ARPs to come from the gw's IP
- arptables -A OUTPUT -o $INTERFACE --opcode request -j mangle --mangle-ip-s "$GATEWAY"
-
- # route interface to the proper routing table
- ip rule add dev $INTERFACE table $TABLE
-
- # static route mapping IP -> INTERFACE
- ip route replace $IP proto static dev $INTERFACE table $TABLE
-
- # Enable proxy ARP
- echo 1 > /proc/sys/net/ipv4/conf/$INTERFACE/proxy_arp
-}
-
-function routed_setup_ipv6 {
- # Add a routing entry for the eui-64
- prefix=$SUBNET6
- uplink=$GATEWAY6
- eui64=$($MAC2EUI64 $MAC $prefix)
-
- while ip -6 rule del dev $INTERFACE; do :; done
- ip -6 rule add dev $INTERFACE table $TABLE
- ip -6 ro replace $eui64/128 dev $INTERFACE table $TABLE
- ip -6 neigh add proxy $eui64 dev $uplink
-
- # disable proxy NDP since we're handling this on userspace
- # this should be the default, but better safe than sorry
- echo 0 > /proc/sys/net/ipv6/conf/$INTERFACE/proxy_ndp
-}
-
-# pick a firewall profile per NIC, based on tags (and apply it)
-function routed_setup_firewall {
- ifprefix="synnefo:network:$INTERFACE_INDEX:"
- for tag in $TAGS; do
- case ${tag#$ifprefix} in
- protected)
- chain=protected
- ;;
- unprotected)
- chain=unprotected
- ;;
- limited)
- chain=limited
- ;;
- esac
- done
-
- # Flush any old rules. We have to consider all chains, since
- # we are not sure the instance was on the same chain, or had the same
- # tap interface.
- for oldchain in protected unprotected limited; do
- iptables -D FORWARD -o $INTERFACE -j $oldchain 2>/dev/null
- ip6tables -D FORWARD -o $INTERFACE -j $oldchain 2>/dev/null
- done
-
- if [ "x$chain" != "x" ]; then
- iptables -A FORWARD -o $INTERFACE -j $chain
- ip6tables -A FORWARD -o $INTERFACE -j $chain
- fi
-}
-
-function setup_nfdhcpd {
- umask 022
- FILE=$NFDHCPD_STATE_DIR/$INTERFACE
- #IFACE is the interface from which the packet seems to arrive
- #needed in bridged mode where the packets seems to arrive from the
- #bridge and not from the tap
- cat >$FILE <<EOF
-IFACE=$1
-IP=$IP
-MAC=$MAC
-HOSTNAME=$INSTANCE
-TAGS="$TAGS"
-EOF
-if [ -n "$GATEWAY" ]; then
- echo GATEWAY=$GATEWAY >> $FILE
-fi
-if [ -n "$SUBNET" ]; then
- echo SUBNET=$SUBNET >> $FILE
-fi
-if [ -n "$GATEWAY6" ]; then
- echo GATEWAY6=$GATEWAY6 >> $FILE
-fi
-if [ -n "$SUBNET6" ]; then
- echo SUBNET6=$SUBNET6 >> $FILE
-fi
-
-}
-
-function clear_ebtables {
- TAP=$INTERFACE
- FROM=FROM${TAP^^}
- TO=TO${TAP^^}
-
- exist=$(ebtables -L | grep $TAP)
-
- if [ ! -z "$exist" ]; then
- ebtables -D INPUT -i $TAP -j $FROM
- ebtables -D FORWARD -i $TAP -j $FROM
- ebtables -D FORWARD -o $TAP -j $TO
- ebtables -D OUTPUT -o $TAP -j $TO
-
- ebtables -X $FROM
- ebtables -X $TO
- fi
-}
-
-function setup_ebtables {
- TAP=$INTERFACE
- FROM=FROM${TAP^^}
- TO=TO${TAP^^}
-
- ebtables -N $FROM
- # do not allow changes in ip-mac pair
- ebtables -A $FROM --ip-source \! $IP -p ipv4 -j DROP
- ebtables -A $FROM -s \! $MAC -j DROP
- ebtables -A FORWARD -i $TAP -j $FROM
- ebtables -N $TO
- ebtables -A FORWARD -o $TAP -j $TO
- #accept dhcp responses from host (nfdhcpd)
- ebtables -A $TO -p ipv4 --ip-protocol=udp --ip-destination-port=68 -j ACCEPT
- if [ "$TYPE" == "private" ]; then
- if [ ! -z "$GATEWAY" -a $ENABLE_MASQ ]; then
- # allow packets from/to router (for masquerading
- ebtables -A $TO -s $ROUTER_MAC -j ACCEPT
- ebtables -A INPUT -i $TAP -j $FROM
- ebtables -A OUTPUT -o $TAP -j $TO
- fi
- # allow only packets from the same mac prefix
- ebtables -A $TO -s \! $MAC/$MAC_MASK -j DROP
- fi
-}
-
-
-
-DEFAULT=/etc/default/snf-network
-source $DEFAULT
-source $CONF
-
-NODEINFRAFILE=$SHAREDDIR/infra/$(hostname)
-
-if [ -e "$NODEINFRAFILE" ]; then
- source $NODEINFRAFILE
-fi
-
-CLUSTERINFRAFILE=$SHAREDDIR/infra/cluster
-
-if [ -e "$CLUSTERINFRAFILE" ]; then
- source $CLUSTERINFRAFILE
-fi
-
-NETFILE=$SHAREDDIR/networks/$NETWORK
-
-if [ -e "$NETFILE" ]; then
- source $NETFILE
-fi
+try clear_routed_setup_ipv4
+try clear_routed_setup_ipv6
+try clear_routed_setup_firewall
+try clear_ebtables
+try clear_nfdhcpd
if [ "$MODE" = "routed" ]; then
- TABLE=rt_$NETWORK
- # special proxy-ARP/NDP routing mode
- clear_tap
- # use a constant predefined MAC address for the tap
- ip link set $INTERFACE addr $TAP_CONSTANT_MAC
- # bring the tap up
- ifconfig $INTERFACE 0.0.0.0 up
-
- # Drop unicast BOOTP/DHCP packets
- iptables -A FORWARD -i $INTERFACE -p udp --dport 67 -j DROP
-
- routed_setup_ipv4
- routed_setup_ipv6
- routed_setup_firewall
- setup_nfdhcpd $INTERFACE
- clear_ebtables >/dev/null 2>&1
+ TABLE=$LINK
+ ip link set $INTERFACE addr $TAP_CONSTANT_MAC up
+ INDEV=$INTERFACE
+ DROPDHCPREQCMD="iptables -A FORWARD -i $INTERFACE -p udp --dport 67 -j DROP"
elif [ "$MODE" = "bridged" ]; then
- clear_tap
- clear_ebtables >/dev/null 2>&1
- ifconfig $INTERFACE 0.0.0.0 up
- brctl addif $BRIDGE $INTERFACE
- setup_nfdhcpd $BRIDGE
- setup_ebtables
-fi
+ ip link set $INTERFACE up
+ brctl addif $BRIDGE $INTERFACE
+ INDEV=$BRIDGE
+ try init_ebtables
+ DROPDHCPREQCMD="ebtables -A $FROM -p ipv4 --ip-protocol udp --ip-destination-port 67 -j DROP"
+fi
+
+
+for tag in $NETWORK_TAGS; do
+ case $tag in
+ $IP_LESS_ROUTED_TAG)
+ try routed_setup_ipv4
+ try routed_setup_ipv6
+ try routed_setup_firewall
+ ;;
+ $NFDHCPD_TAG)
+ # Drop unicast BOOTP/DHCP packets
+ $DROPDHCPREQCMD
+ try setup_nfdhcpd
+ ;;
+ $MAC_FILTERED_TAG)
+ try setup_ebtables
+ ;;
+ $MASQ_TAG)
+ try setup_masq
+ ;;
+ esac
+done
+
+exit 0
projects / snf-network / blobdiff