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1 | cf51ea5b | Dimitris Aragiorgis | #!/bin/bash |
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2 | cf51ea5b | Dimitris Aragiorgis | |
3 | cf51ea5b | Dimitris Aragiorgis | # This is an example of a Ganeti kvm ifup script that configures network |
4 | cf51ea5b | Dimitris Aragiorgis | # interfaces based on the initial deployment of the Okeanos project |
5 | cf51ea5b | Dimitris Aragiorgis | |
6 | cf51ea5b | Dimitris Aragiorgis | TAP_CONSTANT_MAC=cc:47:52:4e:45:54 # GRNET in hex :-) |
7 | cf51ea5b | Dimitris Aragiorgis | MAC2EUI64=/usr/bin/mac2eui64 |
8 | cf51ea5b | Dimitris Aragiorgis | NFDHCPD_STATE_DIR=/var/lib/nfdhcpd |
9 | cf51ea5b | Dimitris Aragiorgis | |
10 | cf51ea5b | Dimitris Aragiorgis | function routed_setup_ipv4 { |
11 | cf51ea5b | Dimitris Aragiorgis | # get the link's default gateway |
12 | cf51ea5b | Dimitris Aragiorgis | gw=$(ip route list table $TABLE | sed -n 's/default via \([^ ]\+\).*/\1/p' | head -1) |
13 | cf51ea5b | Dimitris Aragiorgis | |
14 | cf51ea5b | Dimitris Aragiorgis | # mangle ARPs to come from the gw's IP |
15 | cf51ea5b | Dimitris Aragiorgis | arptables -D OUTPUT -o $INTERFACE --opcode request -j mangle >/dev/null 2>&1 |
16 | cf51ea5b | Dimitris Aragiorgis | arptables -A OUTPUT -o $INTERFACE --opcode request -j mangle --mangle-ip-s "$gw" |
17 | cf51ea5b | Dimitris Aragiorgis | |
18 | cf51ea5b | Dimitris Aragiorgis | # route interface to the proper routing table |
19 | cf51ea5b | Dimitris Aragiorgis | while ip rule del dev $INTERFACE; do :; done |
20 | cf51ea5b | Dimitris Aragiorgis | ip rule add dev $INTERFACE table $TABLE |
21 | cf51ea5b | Dimitris Aragiorgis | |
22 | cf51ea5b | Dimitris Aragiorgis | # static route mapping IP -> INTERFACE |
23 | cf51ea5b | Dimitris Aragiorgis | ip route replace $IP proto static dev $INTERFACE table $TABLE |
24 | cf51ea5b | Dimitris Aragiorgis | |
25 | cf51ea5b | Dimitris Aragiorgis | # Enable proxy ARP |
26 | cf51ea5b | Dimitris Aragiorgis | echo 1 > /proc/sys/net/ipv4/conf/$INTERFACE/proxy_arp |
27 | cf51ea5b | Dimitris Aragiorgis | } |
28 | cf51ea5b | Dimitris Aragiorgis | |
29 | cf51ea5b | Dimitris Aragiorgis | function routed_setup_ipv6 { |
30 | cf51ea5b | Dimitris Aragiorgis | # Add a routing entry for the eui-64 |
31 | cf51ea5b | Dimitris Aragiorgis | prefix=$(ip -6 route list table $TABLE | awk '/\/64/ {print $1; exit}') |
32 | cf51ea5b | Dimitris Aragiorgis | uplink=$(ip -6 route list table $TABLE | sed -n 's/default via .* dev \([^ ]\+\).*/\1/p' | head -1) |
33 | cf51ea5b | Dimitris Aragiorgis | eui64=$($MAC2EUI64 $MAC $prefix) |
34 | cf51ea5b | Dimitris Aragiorgis | |
35 | cf51ea5b | Dimitris Aragiorgis | while ip -6 rule del dev $INTERFACE; do :; done |
36 | cf51ea5b | Dimitris Aragiorgis | ip -6 rule add dev $INTERFACE table $TABLE |
37 | cf51ea5b | Dimitris Aragiorgis | ip -6 ro replace $eui64/128 dev $INTERFACE table $TABLE |
38 | cf51ea5b | Dimitris Aragiorgis | ip -6 neigh add proxy $eui64 dev $uplink |
39 | cf51ea5b | Dimitris Aragiorgis | |
40 | cf51ea5b | Dimitris Aragiorgis | # disable proxy NDP since we're handling this on userspace |
41 | cf51ea5b | Dimitris Aragiorgis | # this should be the default, but better safe than sorry |
42 | cf51ea5b | Dimitris Aragiorgis | echo 0 > /proc/sys/net/ipv6/conf/$INTERFACE/proxy_ndp |
43 | cf51ea5b | Dimitris Aragiorgis | } |
44 | cf51ea5b | Dimitris Aragiorgis | |
45 | cf51ea5b | Dimitris Aragiorgis | # pick a firewall profile per NIC, based on tags (and apply it) |
46 | cf51ea5b | Dimitris Aragiorgis | function routed_setup_firewall { |
47 | cf51ea5b | Dimitris Aragiorgis | ifprefix="synnefo:network:$INTERFACE_INDEX:" |
48 | cf51ea5b | Dimitris Aragiorgis | for tag in $TAGS; do |
49 | cf51ea5b | Dimitris Aragiorgis | case ${tag#$ifprefix} in |
50 | cf51ea5b | Dimitris Aragiorgis | protected) |
51 | cf51ea5b | Dimitris Aragiorgis | chain=protected |
52 | cf51ea5b | Dimitris Aragiorgis | ;; |
53 | cf51ea5b | Dimitris Aragiorgis | unprotected) |
54 | cf51ea5b | Dimitris Aragiorgis | chain=unprotected |
55 | cf51ea5b | Dimitris Aragiorgis | ;; |
56 | cf51ea5b | Dimitris Aragiorgis | limited) |
57 | cf51ea5b | Dimitris Aragiorgis | chain=limited |
58 | cf51ea5b | Dimitris Aragiorgis | ;; |
59 | cf51ea5b | Dimitris Aragiorgis | esac |
60 | cf51ea5b | Dimitris Aragiorgis | done |
61 | cf51ea5b | Dimitris Aragiorgis | |
62 | cf51ea5b | Dimitris Aragiorgis | # Flush any old rules. We have to consider all chains, since |
63 | cf51ea5b | Dimitris Aragiorgis | # we are not sure the instance was on the same chain, or had the same |
64 | cf51ea5b | Dimitris Aragiorgis | # tap interface. |
65 | cf51ea5b | Dimitris Aragiorgis | for oldchain in protected unprotected limited; do |
66 | cf51ea5b | Dimitris Aragiorgis | iptables -D FORWARD -o $INTERFACE -j $oldchain 2>/dev/null |
67 | cf51ea5b | Dimitris Aragiorgis | ip6tables -D FORWARD -o $INTERFACE -j $oldchain 2>/dev/null |
68 | cf51ea5b | Dimitris Aragiorgis | done |
69 | cf51ea5b | Dimitris Aragiorgis | |
70 | cf51ea5b | Dimitris Aragiorgis | if [ "x$chain" != "x" ]; then |
71 | cf51ea5b | Dimitris Aragiorgis | iptables -A FORWARD -o $INTERFACE -j $chain |
72 | cf51ea5b | Dimitris Aragiorgis | ip6tables -A FORWARD -o $INTERFACE -j $chain |
73 | cf51ea5b | Dimitris Aragiorgis | fi |
74 | cf51ea5b | Dimitris Aragiorgis | } |
75 | cf51ea5b | Dimitris Aragiorgis | |
76 | cf51ea5b | Dimitris Aragiorgis | function routed_setup_nfdhcpd { |
77 | cf51ea5b | Dimitris Aragiorgis | umask 022 |
78 | cf51ea5b | Dimitris Aragiorgis | cat >$NFDHCPD_STATE_DIR/$INTERFACE <<EOF |
79 | cf51ea5b | Dimitris Aragiorgis | IFACE=$1 |
80 | cf51ea5b | Dimitris Aragiorgis | IP=$IP |
81 | cf51ea5b | Dimitris Aragiorgis | MAC=$MAC |
82 | cf51ea5b | Dimitris Aragiorgis | LINK=$TABLE |
83 | cf51ea5b | Dimitris Aragiorgis | HOSTNAME=$INSTANCE |
84 | cf51ea5b | Dimitris Aragiorgis | TAGS="$TAGS" |
85 | cf51ea5b | Dimitris Aragiorgis | EOF |
86 | cf51ea5b | Dimitris Aragiorgis | } |
87 | cf51ea5b | Dimitris Aragiorgis | |
88 | cf51ea5b | Dimitris Aragiorgis | function make_ebtables { |
89 | cf51ea5b | Dimitris Aragiorgis | TAP=$INTERFACE |
90 | cf51ea5b | Dimitris Aragiorgis | FROM=FROM${TAP^^} |
91 | cf51ea5b | Dimitris Aragiorgis | TO=TO${TAP^^} |
92 | cf51ea5b | Dimitris Aragiorgis | |
93 | cf51ea5b | Dimitris Aragiorgis | ebtables -D INPUT -i $TAP -j $FROM |
94 | cf51ea5b | Dimitris Aragiorgis | ebtables -D FORWARD -i $TAP -j $FROM |
95 | cf51ea5b | Dimitris Aragiorgis | ebtables -D FORWARD -o $TAP -j $TO |
96 | cf51ea5b | Dimitris Aragiorgis | ebtables -D OUTPUT -o $TAP -j $TO |
97 | cf51ea5b | Dimitris Aragiorgis | |
98 | cf51ea5b | Dimitris Aragiorgis | ebtables -X $FROM |
99 | cf51ea5b | Dimitris Aragiorgis | ebtables -X $TO |
100 | cf51ea5b | Dimitris Aragiorgis | |
101 | cf51ea5b | Dimitris Aragiorgis | ebtables -N $FROM |
102 | cf51ea5b | Dimitris Aragiorgis | ebtables -A $FROM --ip-source \! $IP -p ipv4 -j DROP |
103 | cf51ea5b | Dimitris Aragiorgis | ebtables -A $FROM -s \! $MAC -j DROP |
104 | cf51ea5b | Dimitris Aragiorgis | ebtables -A INPUT -i $TAP -j $FROM |
105 | cf51ea5b | Dimitris Aragiorgis | ebtables -A FORWARD -i $TAP -j $FROM |
106 | cf51ea5b | Dimitris Aragiorgis | ebtables -N $TO |
107 | cf51ea5b | Dimitris Aragiorgis | ebtables -A FORWARD -o $TAP -j $TO |
108 | cf51ea5b | Dimitris Aragiorgis | ebtables -A OUTPUT -o $TAP -j $TO |
109 | cf51ea5b | Dimitris Aragiorgis | if [ $TYPE == "private" ]; then |
110 | cf51ea5b | Dimitris Aragiorgis | ebtables -A $TO -s \! $MAC/$MAC_MASK -j DROP |
111 | cf51ea5b | Dimitris Aragiorgis | if [ ! -z $GATEWAY ]; then |
112 | cf51ea5b | Dimitris Aragiorgis | ebtables -A $TO -s $ROUTER_MAC -j ACCEPT |
113 | cf51ea5b | Dimitris Aragiorgis | fi |
114 | cf51ea5b | Dimitris Aragiorgis | fi |
115 | cf51ea5b | Dimitris Aragiorgis | } |
116 | cf51ea5b | Dimitris Aragiorgis | |
117 | cf51ea5b | Dimitris Aragiorgis | #FIXME: import router mac from the config files |
118 | cf51ea5b | Dimitris Aragiorgis | # must know node group!! how??? |
119 | cf51ea5b | Dimitris Aragiorgis | ROUTER_MAC=6e:10:e1:a0:c3:0f |
120 | cf51ea5b | Dimitris Aragiorgis | MAC_MASK=ff:ff:ff:0:0:0 |
121 | cf51ea5b | Dimitris Aragiorgis | |
122 | cf51ea5b | Dimitris Aragiorgis | TABLE=rt_$NETWORK |
123 | cf51ea5b | Dimitris Aragiorgis | |
124 | cf51ea5b | Dimitris Aragiorgis | source /var/lib/snf-network/networks/$NETWORK |
125 | cf51ea5b | Dimitris Aragiorgis | |
126 | cf51ea5b | Dimitris Aragiorgis | |
127 | cf51ea5b | Dimitris Aragiorgis | if [ "$MODE" = "routed" ]; then |
128 | cf51ea5b | Dimitris Aragiorgis | # special proxy-ARP/NDP routing mode |
129 | cf51ea5b | Dimitris Aragiorgis | |
130 | cf51ea5b | Dimitris Aragiorgis | # use a constant predefined MAC address for the tap |
131 | cf51ea5b | Dimitris Aragiorgis | ip link set $INTERFACE addr $TAP_CONSTANT_MAC |
132 | cf51ea5b | Dimitris Aragiorgis | # bring the tap up |
133 | cf51ea5b | Dimitris Aragiorgis | ifconfig $INTERFACE 0.0.0.0 up |
134 | cf51ea5b | Dimitris Aragiorgis | |
135 | cf51ea5b | Dimitris Aragiorgis | # Drop unicast BOOTP/DHCP packets |
136 | cf51ea5b | Dimitris Aragiorgis | iptables -D FORWARD -i $INTERFACE -p udp --dport 67 -j DROP 2>/dev/null |
137 | cf51ea5b | Dimitris Aragiorgis | iptables -A FORWARD -i $INTERFACE -p udp --dport 67 -j DROP |
138 | cf51ea5b | Dimitris Aragiorgis | |
139 | cf51ea5b | Dimitris Aragiorgis | routed_setup_ipv4 |
140 | cf51ea5b | Dimitris Aragiorgis | routed_setup_ipv6 |
141 | cf51ea5b | Dimitris Aragiorgis | routed_setup_firewall |
142 | cf51ea5b | Dimitris Aragiorgis | routed_setup_nfdhcpd $INTERFACE |
143 | cf51ea5b | Dimitris Aragiorgis | elif [ "$MODE" = "bridged" ]; then |
144 | cf51ea5b | Dimitris Aragiorgis | while ip rule del dev $INTERFACE; do :; done |
145 | cf51ea5b | Dimitris Aragiorgis | ifconfig $INTERFACE 0.0.0.0 up |
146 | cf51ea5b | Dimitris Aragiorgis | brctl addif $BRIDGE $INTERFACE |
147 | cf51ea5b | Dimitris Aragiorgis | routed_setup_nfdhcpd $BRIDGE |
148 | cf51ea5b | Dimitris Aragiorgis | make_ebtables |
149 | cf51ea5b | Dimitris Aragiorgis | fi |