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1 office 1 #!/bin/sh
2 # 464xlat.sh - 464xlat CLAT
3 #
4 # Copyright (c) 2015 Steven Barth <cyrus@openwrt.org>
5 #
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License version 2
8 # as published by the Free Software Foundation
9 #
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
14  
15 [ -n "$INCLUDE_ONLY" ] || {
16 . /lib/functions.sh
17 . /lib/functions/network.sh
18 . ../netifd-proto.sh
19 init_proto "$@"
20 }
21  
22 proto_464xlat_setup() {
23 local cfg="$1"
24 local iface="$2"
25 local link="464-$cfg"
26  
27 local ip6addr ip6prefix tunlink zone
28 json_get_vars ip6addr ip6prefix tunlink zone
29  
30 [ -z "$zone" ] && zone="wan"
31  
32 ( proto_add_host_dependency "$cfg" "::" "$tunlink" )
33  
34 if [ -z "$tunlink" ] && ! network_find_wan6 tunlink; then
35 proto_notify_error "$cfg" "NO_WAN_LINK"
36 return
37 fi
38 network_get_device tundev "$tunlink"
39  
40 ip6addr=$(464xlatcfg "$link" "$tundev" "$ip6prefix" 192.0.0.1 $ip6addr)
41 if [ -z "$ip6addr" ]; then
42 proto_notify_error "$cfg" "CLAT_CONFIG_FAILED"
43 return
44 fi
45  
46 ip -6 rule del from all lookup local
47 ip -6 rule add from all lookup local pref 1
48 ip -6 rule add to $ip6addr lookup prelocal pref 0
49 echo "$ip6addr" > /tmp/464-$cfg-anycast
50  
51 proto_init_update "$link" 1
52 proto_add_ipv4_route "0.0.0.0" 0 "" "" 2048
53 proto_add_ipv6_route $ip6addr 128 "" "" "" "" 128
54  
55 proto_add_data
56 [ "$zone" != "-" ] && json_add_string zone "$zone"
57  
58 json_add_array firewall
59 json_add_object ""
60 json_add_string type nat
61 json_add_string target SNAT
62 json_add_string family inet
63 json_add_string snat_ip 192.0.0.1
64 json_close_object
65 json_add_object ""
66 json_add_string type rule
67 json_add_string family inet6
68 json_add_string proto all
69 json_add_string direction in
70 json_add_string dest "$zone"
71 json_add_string src "$zone"
72 json_add_string src_ip $ip6addr
73 json_add_string target ACCEPT
74 json_close_object
75 json_close_array
76 proto_close_data
77  
78 proto_send_update "$cfg"
79 }
80  
81 proto_464xlat_teardown() {
82 local cfg="$1"
83 local link="464-$cfg"
84  
85 [ -f /tmp/464-$cfg-anycast ] || return
86 local ip6addr=$(cat /tmp/464-$cfg-anycast)
87  
88 464xlatcfg "$link"
89  
90 rm -rf /tmp/464-$cfg-anycast
91 [ -n "$ip6addr" ] && ip -6 rule del to $ip6addr lookup prelocal
92  
93 if [ -z "$(ls /tmp/464-*-anycast 2>&-)" ]; then
94 ip -6 rule del from all lookup local
95 ip -6 rule add from all lookup local pref 0
96 fi
97 }
98  
99 proto_464xlat_init_config() {
100 no_device=1
101 available=1
102  
103 proto_config_add_string "ip6prefix"
104 proto_config_add_string "ip6addr"
105 proto_config_add_string "tunlink"
106 proto_config_add_string "zone"
107 }
108  
109 [ -n "$INCLUDE_ONLY" ] || {
110 add_protocol 464xlat
111 }