blob: 72364a99e959bd30f717d4745ce4ac598614cb23 (
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
|
# Copyright (C) 2009-2010 OpenWrt.org
fw_config_get_redirect() {
[ "${redirect_NAME}" != "$1" ] || return
fw_config_get_section "$1" redirect { \
string _name "$1" \
string name "" \
string src "" \
ipaddr src_ip "" \
ipaddr src_dip "" \
string src_mac "" \
string src_port "" \
string src_dport "" \
string dest "" \
ipaddr dest_ip "" \
string dest_mac "" \
string dest_port "" \
string proto "tcpudp" \
string family "" \
string target "DNAT" \
} || return
[ -n "$redirect_name" ] || redirect_name=$redirect__name
}
fw_load_redirect() {
fw_config_get_redirect "$1"
fw_callback pre redirect
local fwdchain natchain natopt nataddr natports srcdaddr srcdports
if [ "$redirect_target" == "DNAT" ]; then
[ -n "$redirect_src" -a -n "$redirect_dest_ip$redirect_dest_port" ] || {
fw_die "DNAT redirect ${redirect_name}: needs src and dest_ip or dest_port"
}
fwdchain="zone_${redirect_src}_forward"
natopt="--to-destination"
natchain="zone_${redirect_src}_prerouting"
nataddr="$redirect_dest_ip"
fw_get_port_range natports "$redirect_dest_port" "-"
srcdaddr="${redirect_src_dip:+$redirect_src_dip/$redirect_src_dip_prefixlen}"
fw_get_port_range srcdports "$redirect_src_dport" ":"
list_contains FW_CONNTRACK_ZONES $redirect_src || \
append FW_CONNTRACK_ZONES $redirect_src
elif [ "$redirect_target" == "SNAT" ]; then
[ -n "$redirect_dest" -a -n "$redirect_src_dip" ] || {
fw_die "SNAT redirect ${redirect_name}: needs dest and src_dip"
}
fwdchain="${redirect_src:+zone_${redirect_src}_forward}"
natopt="--to-source"
natchain="zone_${redirect_dest}_nat"
nataddr="$redirect_src_dip"
fw_get_port_range natports "$redirect_src_dport" "-"
srcdaddr="${redirect_dest_ip:+$redirect_dest_ip/$redirect_dest_ip_prefixlen}"
fw_get_port_range srcdports "$redirect_dest_port" ":"
list_contains FW_CONNTRACK_ZONES $redirect_dest || \
append FW_CONNTRACK_ZONES $redirect_dest
else
fw_die "redirect ${redirect_name}: target must be either DNAT or SNAT"
fi
local mode
fw_get_family_mode mode ${redirect_family:-x} ${redirect_src:-$redirect_dest} I
local srcaddr="${redirect_src_ip:+$redirect_src_ip/$redirect_src_ip_prefixlen}"
local srcports
fw_get_port_range srcports "$redirect_src_port" ":"
local destaddr="${redirect_dest_ip:+$redirect_dest_ip/$redirect_dest_ip_prefixlen}"
local destports
fw_get_port_range destports "${redirect_dest_port:-$redirect_src_dport}" ":"
[ "$redirect_proto" == "tcpudp" ] && redirect_proto="tcp udp"
for redirect_proto in $redirect_proto; do
fw add $mode n $natchain $redirect_target ^ { $redirect_src_ip $redirect_dest_ip } { \
${redirect_proto:+-p $redirect_proto} \
${srcaddr:+-s $srcaddr} \
${srcports:+--sport $srcports} \
${srcdaddr:+-d $srcdaddr} \
${srcdports:+--dport $srcdports} \
${redirect_src_mac:+-m mac --mac-source $redirect_src_mac} \
$natopt $nataddr${natports:+:$natports} \
}
[ -n "$destaddr" ] && \
fw add $mode f ${fwdchain:-forward} ACCEPT ^ { $redirect_src_ip $redirect_dest_ip } { \
${redirect_proto:+-p $redirect_proto} \
${srcaddr:+-s $srcaddr} \
${srcports:+--sport $srcports} \
${destaddr:+-d $destaddr} \
${destports:+--dport $destports} \
${redirect_src_mac:+-m mac --mac-source $redirect_src_mac} \
}
done
fw_callback post redirect
}
|
