blob: 73d9c61df8d49a756bc645e91baed9b505c12f25 (
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
|
#!/bin/sh
. /etc/functions.sh
. /usr/share/libubox/jshn.sh
find_iface_address()
{
local iface="$1"
local ipaddr="$2"
local prefix="$3"
local tmp="$(ubus call network.interface."$iface" status 2>/dev/null)"
json_load "${tmp:-{}}"
json_get_type tmp address
if [ "$tmp" = array ]; then
json_select address
json_get_type tmp 1
if [ "$tmp" = object ]; then
json_select 1
[ -n "$ipaddr" ] && json_get_var "$ipaddr" address
[ -n "$prefix" ] && json_get_var "$prefix" mask
fi
fi
}
if [ "$ACTION" = "add" ] && [ "$INTERFACE" = "wan" ]; then
local wanip
find_iface_address wan wanip
[ -n "$wanip" ] || return
iptables -t nat -F nat_reflection_in 2>/dev/null || {
iptables -t nat -N nat_reflection_in
iptables -t nat -A prerouting_rule -j nat_reflection_in
}
iptables -t nat -F nat_reflection_out 2>/dev/null || {
iptables -t nat -N nat_reflection_out
iptables -t nat -A postrouting_rule -j nat_reflection_out
}
iptables -t filter -F nat_reflection_fwd 2>/dev/null || {
iptables -t filter -N nat_reflection_fwd
iptables -t filter -A forwarding_rule -j nat_reflection_fwd
}
find_networks() {
find_networks_cb() {
local cfg="$1"
local zone="$2"
local name
config_get name "$cfg" name
[ "$name" = "$zone" ] && {
local network
config_get network "$cfg" network
echo ${network:-$zone}
return 1
}
}
config_foreach find_networks_cb zone "$1"
}
setup_fwd() {
local cfg="$1"
local reflection
config_get_bool reflection "$cfg" reflection 1
[ "$reflection" == 1 ] || return
local src
config_get src "$cfg" src
local target
config_get target "$cfg" target DNAT
[ "$src" = wan ] && [ "$target" = DNAT ] && {
local dest
config_get dest "$cfg" dest "lan"
[ "$dest" != "*" ] || return
local net
for net in $(find_networks "$dest"); do
local lanip lanmk
find_iface_address "$net" lanip lanmk
[ -n "$lanip" ] || return
local proto
config_get proto "$cfg" proto
local epmin epmax extport
config_get extport "$cfg" src_dport
[ -n "$extport" ] || return
epmin="${extport%[-:]*}"; epmax="${extport#*[-:]}"
[ "${epmin#!}" != "$epmax" ] || epmax=""
local ipmin ipmax intport
config_get intport "$cfg" dest_port "$extport"
ipmin="${intport%[-:]*}"; ipmax="${intport#*[-:]}"
[ "${ipmin#!}" != "$ipmax" ] || ipmax=""
local exthost
config_get exthost "$cfg" src_dip "$wanip"
local inthost
config_get inthost "$cfg" dest_ip
[ -n "$inthost" ] || return
[ "$proto" = tcpudp ] && proto="tcp udp"
[ "${inthost#!}" = "$inthost" ] || return 0
[ "${exthost#!}" = "$exthost" ] || return 0
[ "${epmin#!}" != "$epmin" ] && \
extport="! --dport ${epmin#!}${epmax:+:$epmax}" || \
extport="--dport $epmin${epmax:+:$epmax}"
[ "${ipmin#!}" != "$ipmin" ] && \
intport="! --dport ${ipmin#!}${ipmax:+:$ipmax}" || \
intport="--dport $ipmin${ipmax:+:$ipmax}"
local p
for p in ${proto:-tcp udp}; do
case "$p" in
tcp|udp|6|17)
iptables -t nat -A nat_reflection_in \
-s $lanip/$lanmk -d $exthost \
-p $p $extport \
-j DNAT --to $inthost:${ipmin#!}${ipmax:+-$ipmax}
iptables -t nat -A nat_reflection_out \
-s $lanip/$lanmk -d $inthost \
-p $p $intport \
-j SNAT --to-source $lanip
iptables -t filter -A nat_reflection_fwd \
-s $lanip/$lanmk -d $inthost \
-p $p $intport \
-j ACCEPT
;;
esac
done
done
}
}
config_load firewall
config_foreach setup_fwd redirect
fi
|
