MAC2EUI64=/usr/bin/mac2eui64
NFDHCPD_STATE_DIR=/var/lib/nfdhcpd
+function clear_routed_setup_ipv4 {
+ arptables -D OUTPUT -o $INTERFACE --opcode request -j mangle
+ while ip rule del dev $INTERFACE; do :; done
+ iptables -D FORWARD -i $INTERFACE -p udp --dport 67 -j DROP
-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 clear_routed_setup_ipv6 {
+
+ while ip -6 rule del dev $INTERFACE; do :; done
+
+}
+
+
+function clear_routed_setup_firewall {
+
+ for oldchain in protected unprotected limited; do
+ iptables -D FORWARD -o $INTERFACE -j $oldchain
+ ip6tables -D FORWARD -o $INTERFACE -j $oldchain
+ done
+}
+
+function clear_ebtables {
+ 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
}
+
+
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"
+ arptables -A OUTPUT -o $INTERFACE --opcode request -j mangle --mangle-ip-s "$NETWORK_GATEWAY"
# route interface to the proper routing table
ip rule add dev $INTERFACE table $TABLE
function routed_setup_ipv6 {
# Add a routing entry for the eui-64
- prefix=$SUBNET6
- uplink=$GATEWAY6
+ prefix=$NETWORK_SUBNET6
+ uplink=$PUBLIC_VLAN
eui64=$($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
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 init_ebtables {
+
+ ebtables -N $FROM
+ ebtables -A FORWARD -i $TAP -j $FROM
+ ebtables -N $TO
+ ebtables -A FORWARD -o $TAP -j $TO
+
+}
+
+
+function setup_ebtables {
+
+ # do not allow changes in ip-mac pair
+ if [ -n "$IP"]; then
+ ebtables -A $FROM --ip-source \! $IP -p ipv4 -j DROP
+ fi
+ ebtables -A $FROM -s \! $MAC -j DROP
+ #accept dhcp responses from host (nfdhcpd)
+ ebtables -A $TO -p ipv4 --ip-protocol=udp --ip-destination-port=68 -j ACCEPT
+ # allow only packets from the same mac prefix
+ ebtables -A $TO -s \! $MAC/$MAC_MASK -j DROP
+}
+
+function setup_masq {
+
+ # allow packets from/to router (for masquerading)
+ # ebtables -A $TO -s $PUBLIC_MAC -j ACCEPT
+ # ebtables -A INPUT -i $TAP -j $FROM
+ # ebtables -A OUTPUT -o $TAP -j $TO
+ return
+
+}
+
function setup_nfdhcpd {
umask 022
FILE=$NFDHCPD_STATE_DIR/$INTERFACE
#needed in bridged mode where the packets seems to arrive from the
#bridge and not from the tap
cat >$FILE <<EOF
-IFACE=$1
+INDEV=$INDEV
IP=$IP
MAC=$MAC
HOSTNAME=$INSTANCE
TAGS="$TAGS"
+GATEWAY=$NETWORK_GATEWAY
+SUBNET=$NETWORK_SUBNET
+GATEWAY6=$NETWORK_GATEWAY6
+SUBNET6=$NETWORK_SUBNET6
+EUI64=$($MAC2EUI64 $MAC $NETWORK_SUBNET6 2>/dev/null)
EOF
-if [ -n "$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" ]; 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/$(hostname)
+INFRA=$STATE_DIR/infra
-if [ -e "$NODEINFRAFILE" ]; then
- source $NODEINFRAFILE
-fi
+source $INFRA
+log-env
-NETFILE=$SHAREDDIR/networks/$NETWORK
-if [ -e "$NETFILE" ]; then
- source $NETFILE
-fi
+TAP=$INTERFACE
+FROM=FROM${TAP^^}
+TO=TO${TAP^^}
+
+clear_routed_setup_ipv4 > /dev/null 2>&1
+clear_routed_setup_ipv6 > /dev/null 2>&1
+clear_routed_setup_firewall > /dev/null 2>&1
+clear_ebtables > /dev/null 2>&1
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
+ ip link set $INTERFACE up
+ brctl addif $BRIDGE $INTERFACE
+ INDEV=$BRIDGE
+ init_ebtables > /dev/null 2>&1
+ 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)
+ routed_setup_ipv4 > /dev/null 2>&1
+ routed_setup_ipv6 > /dev/null 2>&1
+ routed_setup_firewall > /dev/null 2>&1
+ ;;
+ nfdhcpd)
+ # Drop unicast BOOTP/DHCP packets
+ $DROPDHCPREQCMD > /dev/null 2>&1
+ setup_nfdhcpd > /dev/null 2>&1
+ ;;
+ mac-filtered)
+ setup_ebtables > /dev/null 2>&1
+ ;;
+ masq)
+ setup_masq > /dev/null 2>&1
+ ;;
+ esac
+done
+
projects / snf-network / blobdiff