blob: bbf8dba41b10a784f5efcb6d693a3b08d4ecef5d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
# 6to4.sh - IPv6-in-IPv4 tunnel backend
# Copyright (c) 2010 OpenWrt.org
find_6to4_wanif() {
local if=$(ip -4 r l e 0.0.0.0/0); if="${if#default* dev }"; if="${if%% *}"
[ -n "$if" ] && grep -qs "^ *$if:" /proc/net/dev && echo "$if"
}
find_6to4_wanip() {
local ip=$(ip -4 a s dev "$1"); ip="${ip#*inet }"
echo "${ip%%[^0-9.]*}"
}
find_6to4_prefix() {
local ip4="$1"
local oIFS="$IFS"; IFS="."; set -- $ip4; IFS="$oIFS"
printf "2002:%02x%02x:%02x%02x\n" $1 $2 $3 $4
}
# Hook into scan_interfaces() to synthesize a .device option
# This is needed for /sbin/ifup to properly dispatch control
# to setup_interface_6to4() even if no .ifname is set in
# the configuration.
scan_6to4() {
config_set "$1" device "6to4-$1"
}
coldplug_interface_6to4() {
setup_interface_6to4 "6to4-$1" "$1"
}
setup_interface_6to4() {
local iface="$1"
local cfg="$2"
local link="6to4-$cfg"
local local4=$(uci_get network "$cfg" ipaddr)
local mtu
config_get mtu "$cfg" mtu
local ttl
config_get ttl "$cfg" ttl
local defaultroute
config_get_bool defaultroute "$cfg" defaultroute 1
local wanif=$(find_6to4_wanif)
[ -z "$wanif" ] && {
logger -t "$link" "Cannot find wan interface - aborting"
return
}
local wancfg=$(find_config "$wanif")
[ -z "$wancfg" ] && {
logger -t "$link" "Cannot find wan network - aborting"
return
}
# If local4 is unset, guess local IPv4 address from the
# interface used by the default route.
[ -z "$local4" ] && {
[ -n "$wanif" ] && {
local4=$(find_6to4_wanip "$wanif")
uci_set_state network "$cfg" wan_device "$wanif"
}
}
[ -n "$local4" ] && {
logger -t "$link" "Starting ..."
# creating the tunnel below will trigger a net subsystem event
# prevent it from touching or iface by disabling .auto here
uci_set_state network "$cfg" ifname $link
uci_set_state network "$cfg" auto 0
# find our local prefix
local prefix6=$(find_6to4_prefix "$local4")
local local6="$prefix6::1/16"
logger -t "$link" " * IPv4 address is $local4"
logger -t "$link" " * IPv6 address is $local6"
ip tunnel add $link mode sit remote any local $local4 ttl ${ttl:-64}
ip link set $link up
ip link set mtu ${mtu:-1280} dev $link
ip addr add $local6 dev $link
uci_set_state network "$cfg" ipaddr $local4
uci_set_state network "$cfg" ip6addr $local6
[ "$defaultroute" = 1 ] && {
logger -t "$link" " * Adding default route"
ip -6 route add 2000::/3 via ::192.88.99.1 dev $link metric 1
uci_set_state network "$cfg" defaultroute 1
}
# find delegation target
local adv_interface
config_get adv_interface "$cfg" adv_interface
local adv_ifname
config_get adv_ifname "${adv_interface:-lan}" ifname
local adv_subnet=$(uci_get network "$cfg" adv_subnet)
grep -qs "^ *$adv_ifname:" /proc/net/dev && {
local subnet6="$prefix6:${adv_subnet:-1}::1/64"
logger -t "$link" " * Advertising IPv6 subnet $subnet6 on ${adv_interface:-lan} ($adv_ifname)"
ip -6 addr add $subnet6 dev $adv_ifname
uci_set_state network "$cfg" adv_subnet "$subnet6"
uci_set_state network "$cfg" adv_ifname "$adv_ifname"
[ -f /etc/config/radvd ] && /etc/init.d/radvd enabled && {
local sid="6to4_$cfg"
uci -q batch <<-EOF
revert radvd.iface_$sid
revert radvd.prefix_$sid
set radvd.iface_$sid=interface
set radvd.iface_$sid.ignore=0
set radvd.iface_$sid.interface=${adv_interface:-lan}
set radvd.iface_$sid.IgnoreIfMissing=1
set radvd.iface_$sid.AdvSendAdvert=1
set radvd.iface_$sid.MaxRtrAdvInterval=30
set radvd.prefix_$sid=prefix
set radvd.prefix_$sid.ignore=0
set radvd.prefix_$sid.interface=${adv_interface:-lan}
set radvd.prefix_$sid.prefix=0:0:0:${adv_subnet:-1}::/64
set radvd.prefix_$sid.AdvOnLink=1
set radvd.prefix_$sid.AdvAutonomous=1
set radvd.prefix_$sid.AdvValidLifetime=300
set radvd.prefix_$sid.AdvPreferredLifetime=120
set radvd.prefix_$sid.Base6to4Interface=$wancfg
EOF
/etc/init.d/radvd restart
}
}
logger -t "$link" "... started"
env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6to4 /sbin/hotplug-call "iface" &
} || {
echo "Cannot determine local IPv4 address for 6to4 tunnel $cfg - skipping"
}
}
stop_interface_6to4() {
local cfg="$1"
local link="6to4-$cfg"
local local6=$(uci_get_state network "$cfg" ip6addr)
local defaultroute=$(uci_get_state network "$cfg" defaultroute)
local adv_subnet=$(uci_get_state network "$cfg" adv_subnet)
local adv_ifname=$(uci_get_state network "$cfg" adv_ifname)
grep -qs "^ *$link:" /proc/net/dev && {
logger -t "$link" "Shutting down ..."
env -i ACTION="ifdown" INTERFACE="$cfg" DEVICE="$link" PROTO=6to4 /sbin/hotplug-call "iface" &
[ -n "$adv_subnet" ] && [ -n "$adv_ifname" ] && {
local sid="6to4_$cfg"
uci -q batch <<-EOF
revert radvd.iface_$sid
revert radvd.prefix_$sid
EOF
/etc/init.d/radvd enabled && /etc/init.d/radvd restart
ip -6 addr del $adv_subnet dev $adv_ifname
}
[ "$defaultroute" = "1" ] && {
ip -6 route del 2000::/3 via ::192.88.99.1 dev $link metric 1
}
ip addr del $local6 dev $link
ip link set $link down
ip tunnel del $link
logger -t "$link" "... stopped"
}
}
|
