root / common.sh @ a67910c4
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#!/bin/bash |
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|
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function try { |
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|
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$1 &>/dev/null || true |
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} |
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function clear_routed_setup_ipv4 { |
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|
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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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|
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} |
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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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|
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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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} |
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function clear_ebtables { |
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|
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runlocked $RUNLOCKED_OPTS ebtables -D FORWARD -i $INTERFACE -j $FROM |
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runlocked $RUNLOCKED_OPTS ebtables -D INPUT -i $INTERFACE -j $FROM |
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runlocked $RUNLOCKED_OPTS ebtables -D FORWARD -o $INTERFACE -j $TO |
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runlocked $RUNLOCKED_OPTS ebtables -D OUTPUT -o $INTERFACE -j $TO |
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|
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runlocked $RUNLOCKED_OPTS ebtables -X $FROM |
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runlocked $RUNLOCKED_OPTS ebtables -X $TO |
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} |
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|
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function clear_nfdhcpd { |
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rm $NFDHCPD_STATE_DIR/$INTERFACE |
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} |
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function routed_setup_ipv4 { |
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if [ -z "$INTERFACE" -o -z "$NETWORK_GATEWAY" -o -z "$IP" -o -z "$TABLE" ] |
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then |
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return |
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fi |
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|
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# mangle ARPs to come from the gw's IP |
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arptables -A OUTPUT -o $INTERFACE --opcode request -j mangle --mangle-ip-s "$NETWORK_GATEWAY" |
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|
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# route interface to the proper routing table |
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ip rule add dev $INTERFACE table $TABLE |
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|
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# static route mapping IP -> INTERFACE |
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ip route replace $IP proto static dev $INTERFACE table $TABLE |
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|
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# Enable proxy ARP |
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echo 1 > /proc/sys/net/ipv4/conf/$INTERFACE/proxy_arp |
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|
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# Send GARP from host to upstream router |
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get_uplink $TABLE |
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echo 1 > /proc/sys/net/ipv4/ip_nonlocal_bind |
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hooks-log $0 "arping -c3 -I $UPLINK -U $IP" |
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arping -c3 -I $UPLINK -U $IP |
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echo 0 > /proc/sys/net/ipv4/ip_nonlocal_bind |
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|
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} |
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|
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function routed_setup_ipv6 { |
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# Add a routing entry for the eui-64 |
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get_uplink $TABLE "-6" |
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get_eui64 $MAC $NETWORK_SUBNET6 |
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|
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if [ -z "$EUI64" -o -z "$TABLE" -o -z "$INTERFACE" -o -z "$UPLINK" ] |
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then |
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return |
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fi |
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|
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ip -6 rule add dev $INTERFACE table $TABLE |
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ip -6 ro replace $EUI64/128 dev $INTERFACE table $TABLE |
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ip -6 neigh add proxy $EUI64 dev $UPLINK |
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|
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# disable proxy NDP since we're handling this on userspace |
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# this should be the default, but better safe than sorry |
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echo 0 > /proc/sys/net/ipv6/conf/$INTERFACE/proxy_ndp |
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|
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# Send Unsolicited Neighbor Advertisement |
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hooks-log $0 "ndsend $EUI64 $UPLINK" |
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ndsend $EUI64 $UPLINK |
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|
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} |
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|
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# pick a firewall profile per NIC, based on tags (and apply it) |
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function routed_setup_firewall { |
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# for latest ganeti there is no need to check other but uuid |
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ifprefixindex="synnefo:network:$INTERFACE_INDEX:" |
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ifprefixname="synnefo:network:$INTERFACE_NAME:" |
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ifprefixuuid="synnefo:network:$INTERFACE_UUID:" |
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for tag in $TAGS; do |
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tag=${tag#$ifprefixindex} |
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tag=${tag#$ifprefixname} |
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tag=${tag#$ifprefixuuid} |
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case $tag in |
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protected) |
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chain=protected |
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;; |
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unprotected) |
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chain=unprotected |
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;; |
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limited) |
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chain=limited |
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;; |
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esac |
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done |
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|
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if [ "x$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 init_ebtables { |
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|
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runlocked $RUNLOCKED_OPTS ebtables -N $FROM |
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runlocked $RUNLOCKED_OPTS ebtables -A FORWARD -i $INTERFACE -j $FROM |
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# This is needed for multicast packets |
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runlocked $RUNLOCKED_OPTS ebtables -A INPUT -i $INTERFACE -j $FROM |
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|
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runlocked $RUNLOCKED_OPTS ebtables -N $TO |
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runlocked $RUNLOCKED_OPTS ebtables -A FORWARD -o $INTERFACE -j $TO |
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# This is needed for multicast packets |
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runlocked $RUNLOCKED_OPTS ebtables -A OUTPUT -o $INTERFACE -j $TO |
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|
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} |
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function setup_ebtables { |
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# do not allow changes in ip-mac pair |
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if [ -n "$IP"]; then |
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runlocked $RUNLOCKED_OPTS ebtables -A $FROM --ip-source \! $IP -p ipv4 -j DROP |
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fi |
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runlocked $RUNLOCKED_OPTS ebtables -A $FROM -s \! $MAC -j DROP |
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#accept dhcp responses from host (nfdhcpd) |
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runlocked $RUNLOCKED_OPTS ebtables -A $TO -s $INDEV_MAC -p ipv4 --ip-protocol=udp --ip-destination-port=68 -j ACCEPT |
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# allow only packets from the same mac prefix |
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runlocked $RUNLOCKED_OPTS ebtables -A $TO -s \! $MAC/$MAC_MASK -j DROP |
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} |
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function setup_masq { |
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# allow packets from/to router (for masquerading) |
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# runlocked $RUNLOCKED_OPTS ebtables -A $TO -s $NODE_MAC -j ACCEPT |
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# runlocked $RUNLOCKED_OPTS ebtables -A INPUT -i $INTERFACE -j $FROM |
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# runlocked $RUNLOCKED_OPTS ebtables -A OUTPUT -o $INTERFACE -j $TO |
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return |
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|
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} |
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function setup_nfdhcpd { |
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umask 022 |
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FILE=$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=$INDEV |
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IP=$IP |
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MAC=$MAC |
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HOSTNAME=$INSTANCE |
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TAGS="$TAGS" |
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GATEWAY=$NETWORK_GATEWAY |
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SUBNET=$NETWORK_SUBNET |
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GATEWAY6=$NETWORK_GATEWAY6 |
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SUBNET6=$NETWORK_SUBNET6 |
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EUI64=$($MAC2EUI64 $MAC $NETWORK_SUBNET6 2>/dev/null) |
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EOF |
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} |
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function get_uplink { |
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local table=$1 |
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local version=$2 |
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UPLINK=$(ip "$version" route list table "$table" | grep "default via" | awk '{print $5}') |
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} |
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# Because we do not have IPv6 value in our environment |
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# we caclulate it based on the NIC's MAC and the IPv6 subnet (if any) |
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# first argument MAC second IPv6 subnet |
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# Changes global value EUI64 |
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get_eui64 () { |
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local mac=$1 |
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local prefix=$2 |
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if [ -z "$prefix" ]; then |
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EUI64= |
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else |
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EUI64=$($MAC2EUI64 $mac $prefix) |
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fi |
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|
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} |