OpenWrt – Blame information for rev 1

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1 office 1 #!/bin/sh
2 # 6to4.sh - IPv6-in-IPv4 tunnel backend
3 # Copyright (c) 2010-2012 OpenWrt.org
4  
5 [ -n "$INCLUDE_ONLY" ] || {
6 . /lib/functions.sh
7 . /lib/functions/network.sh
8 . ../netifd-proto.sh
9 init_proto "$@"
10 }
11  
12 find_6to4_prefix() {
13 local ip4="$1"
14 local oIFS="$IFS"; IFS="."; set -- $ip4; IFS="$oIFS"
15  
16 printf "2002:%02x%02x:%02x%02x\n" $1 $2 $3 $4
17 }
18  
19 test_6to4_rfc1918()
20 {
21 local oIFS="$IFS"; IFS="."; set -- $1; IFS="$oIFS"
22 [ $1 -eq 10 ] && return 0
23 [ $1 -eq 192 ] && [ $2 -eq 168 ] && return 0
24 [ $1 -eq 172 ] && [ $2 -ge 16 ] && [ $2 -le 31 ] && return 0
25  
26 # RFC 6598
27 [ $1 -eq 100 ] && [ $2 -ge 64 ] && [ $2 -le 127 ] && return 0
28  
29 return 1
30 }
31  
32 proto_6to4_setup() {
33 local cfg="$1"
34 local iface="$2"
35 local link="6to4-$cfg"
36  
37 local mtu ttl tos ipaddr
38 json_get_vars mtu ttl tos ipaddr
39  
40 ( proto_add_host_dependency "$cfg" 0.0.0.0 )
41  
42 local wanif
43 if ! network_find_wan wanif; then
44 proto_notify_error "$cfg" "NO_WAN_LINK"
45 return
46 fi
47  
48 [ -z "$ipaddr" ] && {
49 if ! network_get_ipaddr ipaddr "$wanif"; then
50 proto_notify_error "$cfg" "NO_WAN_ADDRESS"
51 return
52 fi
53 }
54  
55 test_6to4_rfc1918 "$ipaddr" && {
56 proto_notify_error "$cfg" "INVALID_LOCAL_ADDRESS"
57 return
58 }
59  
60 # find our local prefix
61 local prefix6=$(find_6to4_prefix "$ipaddr")
62 local local6="$prefix6::1"
63  
64 proto_init_update "$link" 1
65 proto_add_ipv6_address "$local6" 16
66 proto_add_ipv6_prefix "$prefix6::/48"
67  
68 proto_add_ipv6_route "::" 0 "::192.88.99.1" "" "" "$local6/16"
69 proto_add_ipv6_route "::" 0 "::192.88.99.1" "" "" "$prefix6::/48"
70  
71 proto_add_tunnel
72 json_add_string mode sit
73 json_add_int mtu "${mtu:-1280}"
74 json_add_int ttl "${ttl:-64}"
75 [ -n "$tos" ] && json_add_string tos "$tos"
76 json_add_string local "$ipaddr"
77 proto_close_tunnel
78  
79 proto_send_update "$cfg"
80 }
81  
82 proto_6to4_teardown() {
83 local cfg="$1"
84 }
85  
86 proto_6to4_init_config() {
87 no_device=1
88 available=1
89  
90 proto_config_add_string "ipaddr"
91 proto_config_add_int "mtu"
92 proto_config_add_int "ttl"
93 proto_config_add_string "tos"
94 }
95  
96 [ -n "$INCLUDE_ONLY" ] || {
97 add_protocol 6to4
98 }