5f4add36eb80210b41375ac865aadbc79804903f
[openwrt/openwrt.git] / package / network / ipv6 / map / files / map.sh
1 #!/bin/sh
2 # map.sh - IPv4-in-IPv6 tunnel backend
3 #
4 # Author: Steven Barth <cyrus@openwrt.org>
5 # Copyright (c) 2014 cisco Systems, Inc.
6 #
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License version 2
9 # as published by the Free Software Foundation
10 #
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
15
16 [ -n "$INCLUDE_ONLY" ] || {
17 . /lib/functions.sh
18 . /lib/functions/network.sh
19 . ../netifd-proto.sh
20 init_proto "$@"
21 }
22
23 proto_map_setup() {
24 local cfg="$1"
25 local iface="$2"
26 local link="map-$cfg"
27
28 # uncomment for legacy MAP0 mode
29 #export LEGACY=1
30
31 local type mtu ttl tunlink zone encaplimit
32 local rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset
33 json_get_vars type mtu ttl tunlink zone encaplimit
34 json_get_vars rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset
35
36 [ -z "$zone" ] && zone="wan"
37 [ -z "$type" ] && type="map-e"
38 [ -z "$ip4prefixlen" ] && ip4prefixlen=32
39
40 ( proto_add_host_dependency "$cfg" "::" "$tunlink" )
41
42 # fixme: handle RA/DHCPv6 address race for LW
43 [ "$type" = lw4o6 ] && sleep 5
44
45 if [ -z "$rule" ]; then
46 rule="type=$type,ipv6prefix=$ip6prefix,prefix6len=$ip6prefixlen,ipv4prefix=$ipaddr,prefix4len=$ip4prefixlen"
47 [ -n "$psid" ] && rule="$rule,psid=$psid"
48 [ -n "$psidlen" ] && rule="$rule,psidlen=$psidlen"
49 [ -n "$offset" ] && rule="$rule,offset=$offset"
50 [ -n "$ealen" ] && rule="$rule,ealen=$ealen"
51 if [ "$type" = "map-t" ]; then
52 rule="$rule,dmr=$peeraddr"
53 else
54 rule="$rule,br=$peeraddr"
55 fi
56 fi
57
58 echo "rule=$rule" > /tmp/map-$cfg.rules
59 RULE_DATA=$(mapcalc ${tunlink:-\*} $rule)
60 if [ "$?" != 0 ]; then
61 proto_notify_error "$cfg" "INVALID_MAP_RULE"
62 proto_block_restart "$cfg"
63 return
64 fi
65
66 echo "$RULE_DATA" >> /tmp/map-$cfg.rules
67 eval $RULE_DATA
68
69 if [ -z "$RULE_BMR" ]; then
70 proto_notify_error "$cfg" "NO_MATCHING_PD"
71 proto_block_restart "$cfg"
72 return
73 fi
74
75 k=$RULE_BMR
76 if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
77 proto_init_update "$link" 1
78 proto_add_ipv4_address $(eval "echo \$RULE_${k}_IPV4ADDR") "" "" ""
79
80 proto_add_tunnel
81 json_add_string mode ipip6
82 json_add_int mtu "${mtu:-1280}"
83 json_add_int ttl "${ttl:-64}"
84 json_add_string local $(eval "echo \$RULE_${k}_IPV6ADDR")
85 json_add_string remote $(eval "echo \$RULE_${k}_BR")
86 json_add_string link $(eval "echo \$RULE_${k}_PD6IFACE")
87 json_add_object "data"
88 json_add_string encaplimit "${encaplimit:-4}"
89 if [ "$type" = "map-e" ]; then
90 json_add_array "fmrs"
91 for i in $(seq $RULE_COUNT); do
92 [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
93 json_add_object ""
94 json_add_string prefix6 "$(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
95 json_add_string prefix4 "$(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
96 json_add_int ealen $(eval "echo \$RULE_${i}_EALEN")
97 json_add_int offset $(eval "echo \$RULE_${i}_OFFSET")
98 json_close_object
99 done
100 json_close_array
101 fi
102 json_close_object
103
104
105 proto_close_tunnel
106 elif [ "$type" = "map-t" -a -f "/proc/net/nat46/control" ]; then
107 proto_init_update "$link" 1
108 local style="MAP"
109 [ "$LEGACY" = 1 ] && style="MAP0"
110
111 echo add $link > /proc/net/nat46/control
112 local cfgstr="local.style $style local.v4 $(eval "echo \$RULE_${k}_IPV4PREFIX")/$(eval "echo \$RULE_${k}_PREFIX4LEN")"
113 cfgstr="$cfgstr local.v6 $(eval "echo \$RULE_${k}_IPV6PREFIX")/$(eval "echo \$RULE_${k}_PREFIX6LEN")"
114 cfgstr="$cfgstr local.ea-len $(eval "echo \$RULE_${k}_EALEN") local.psid-offset $(eval "echo \$RULE_${k}_OFFSET")"
115 cfgstr="$cfgstr remote.v4 0.0.0.0/0 remote.v6 $(eval "echo \$RULE_${k}_DMR") remote.style RFC6052 remote.ea-len 0 remote.psid-offset 0"
116 echo config $link $cfgstr > /proc/net/nat46/control
117
118 for i in $(seq $RULE_COUNT); do
119 [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
120 local cfgstr="remote.style $style remote.v4 $(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
121 cfgstr="$cfgstr remote.v6 $(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
122 cfgstr="$cfgstr remote.ea-len $(eval "echo \$RULE_${i}_EALEN") remote.psid-offset $(eval "echo \$RULE_${i}_OFFSET")"
123 echo insert $link $cfgstr > /proc/net/nat46/control
124 done
125 else
126 proto_notify_error "$cfg" "UNSUPPORTED_TYPE"
127 proto_block_restart "$cfg"
128 fi
129
130 proto_add_ipv4_route "0.0.0.0" 0
131 proto_add_data
132 [ "$zone" != "-" ] && json_add_string zone "$zone"
133
134 json_add_array firewall
135 if [ -z "$(eval "echo \$RULE_${k}_PORTSETS")" ]; then
136 json_add_object ""
137 json_add_string type nat
138 json_add_string target SNAT
139 json_add_string family inet
140 json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
141 json_close_object
142 else
143 for portset in $(eval "echo \$RULE_${k}_PORTSETS"); do
144 for proto in icmp tcp udp; do
145 json_add_object ""
146 json_add_string type nat
147 json_add_string target SNAT
148 json_add_string family inet
149 json_add_string proto "$proto"
150 json_add_boolean connlimit_ports 1
151 json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
152 json_add_string snat_port "$portset"
153 json_close_object
154 done
155 done
156 fi
157 if [ "$type" = "map-t" ]; then
158 json_add_object ""
159 json_add_string type rule
160 json_add_string family inet6
161 json_add_string proto all
162 json_add_string direction in
163 json_add_string dest "$zone"
164 json_add_string src "$zone"
165 json_add_string src_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
166 json_add_string target ACCEPT
167 json_close_object
168 json_add_object ""
169 json_add_string type rule
170 json_add_string family inet6
171 json_add_string proto all
172 json_add_string direction out
173 json_add_string dest "$zone"
174 json_add_string src "$zone"
175 json_add_string dest_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
176 json_add_string target ACCEPT
177 json_close_object
178 proto_add_ipv6_route $(eval "echo \$RULE_${k}_IPV6ADDR") 128
179 fi
180 json_close_array
181 proto_close_data
182
183 proto_send_update "$cfg"
184
185 if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
186 json_init
187 json_add_string name "${cfg}_"
188 json_add_string ifname "@$(eval "echo \$RULE_${k}_PD6IFACE")"
189 json_add_string proto "static"
190 json_add_array ip6addr
191 json_add_string "" "$(eval "echo \$RULE_${k}_IPV6ADDR")"
192 json_close_array
193 json_close_object
194 ubus call network add_dynamic "$(json_dump)"
195 fi
196 }
197
198 proto_map_teardown() {
199 local cfg="$1"
200 local link="map-$cfg"
201
202 json_get_var type type
203
204 [ -z "$type" ] && type="map-e"
205
206 case "$type" in
207 "map-e"|"lw4o6") ifdown "${cfg}_" ;;
208 "map-t") [ -f "/proc/net/nat46/control" ] && echo del $link > /proc/net/nat46/control ;;
209 esac
210
211 rm -f /tmp/map-$cfg.rules
212 }
213
214 proto_map_init_config() {
215 no_device=1
216 available=1
217
218 proto_config_add_string "rule"
219 proto_config_add_string "ipaddr"
220 proto_config_add_int "ip4prefixlen"
221 proto_config_add_string "ip6prefix"
222 proto_config_add_int "ip6prefixlen"
223 proto_config_add_string "peeraddr"
224 proto_config_add_int "ealen"
225 proto_config_add_int "psidlen"
226 proto_config_add_int "psid"
227 proto_config_add_int "offset"
228
229 proto_config_add_string "tunlink"
230 proto_config_add_int "mtu"
231 proto_config_add_int "ttl"
232 proto_config_add_string "zone"
233 proto_config_add_string "encaplimit"
234 }
235
236 [ -n "$INCLUDE_ONLY" ] || {
237 add_protocol map
238 }