blob: ac0488a77605e8d597c62209a1db10e13ac229da (
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
|
#!/bin/bash
PATH=/sbin:/usr/sbin:$PATH
rt_tables=/etc/iproute2/rt_tables
confdir=/etc/dgd
linkdir=$confdir/links
active=$confdir/active
forwarders=/var/named/forwarders
# 1 2 3 4 5 6 7
# linksetup NAME IF IP GW NS1 NS2 [NET]
linksetup() {
n=$(awk '
BEGIN { i = -1 }
/^#/ { next }
/^$/ { next }
$2=="'$1'" { i = $1; exit(0) }
{ t[$1] = $2; if ($1>n) n = $1 }
END {
if (i == -1) {
for (i=0; i < n && t[i]; i++);
print i
}
}' $rt_tables)
if [ -n "$n" ]; then
echo "$n $1" >> $rt_tables
fi
ip rule add from $3 table $1
ip rule add from $5 table $1
if [ -n "$6" ]; then
ip rule add from $6 table $1
fi
ip route add default via $4 table $1
if [ -n "$7" ]; then
ip route add $7 dev $2 src $3 table $1
fi
test -d $linkdir || mkdir -p $linkdir
cat > "$linkdir/$1" <<EOF
[link $1]
name=$1
if=$2
ip=$3
gw=$4
ns=$5 $6
net=$7
EOF
}
readlinkinfo() {
unset link_if link_ip link_gw link_ns link_net
eval `sed -r 's/^[[:space:]]+//;/^#/d;/^\[/d;s/(.[^=[:space:]]*)[[:space:]]*=[[:space:]]*(.*)/link_\1="\2"/' $1`
}
# linkcleanup NAME
linkcleanup() {
test -f "$linkdir/$1" && rm "$linkdir/$1"
ip route flush table $1
}
#linkup NAME
linkup() {
local name=$1 link_if link_ip link_gw link_ns link_net
shift
if [ -f "$linkdir/$name" ]; then
readlinkinfo "$linkdir/$name"
if [ -z "$link_gw" ]; then
echo >&2 "$0: $linkdir/$name: gw not set"
exit 1
fi
ip route add default via $link_gw
cat > $active <<EOT
[core]
active = $name
EOT
echo "$link_ns" | awk '
BEGIN { print "forwarders {" }
{ for (i = 1; i <= NF; i++) print " " $(i); }
END { print "};" }' > $forwarders
rndc reload
else
echo >&2 "$0: $linkdir/$name: no such file"
exit 1
fi
}
#linkdown NAME
linkdown() {
local name=$1 link_if link_ip link_gw link_ns link_net link_active
shift
if [ -f "$linkdir/$name" ]; then
readlinkinfo "$linkdir/$name"
if [ -z "$link_gw" ]; then
echo >&2 "$0: $linkdir/$name: gw not set"
exit 1
fi
ip route del default via $link_gw
if [ -r "$active" ]; then
readlinkinfo $active
if [ "$link_name" = "$name" ]; then
rm $active
fi
fi
else
echo >&2 "$0: $linkdir/$name: no such file"
exit 1
fi
}
command=$1
shift
case $command in
setup) linksetup "$@";;
cleanup) linkcleanup "$@";;
up) linkup "$@";;
down) linkdown "$@";;
*) echo >&2 "$0: unrecognized command";;
esac
|