blob: 4ee3ac8af81f9a3f21df730d8cad3fbb7ac77a39 (
plain) (
blame)
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
|
#!/bin/ash
# Reloads iptables rules by flushing the tables and applying everything
# in /opt/openslx/iptables/rules.d again. Actions are delayed by 5 seconds
# to coalesce changes, since inotifyd can trigger dozens of events in a row.
#
# This scriptis triggered by inotifyd, see openslx-iptables_reloader.service
ALL_RULES="/run/iptables-reloader.cache"
LOCK="/run/iptables-reloader.lock"
# Expects $1 to be the contents of $LOCK
reload_rules () {
if [ -z "$1" -o ! -s "$LOCK" ]; then
echo "'$1' empty or lock non-existent"
exit 0
fi
sleep 2
if [ "x$(cat "$LOCK")" != "x$1" ]; then
echo "Wrong lock, lost race"
exit 0
fi
rm -f -- "${ALL_RULES}.new"
for file in /opt/openslx/iptables/rules.d/*; do
[ -f "$file" ] || continue
cat "$file" >> "${ALL_RULES}.new"
done
# No change? Do nothing...
if [ -s "${ALL_RULES}" ] && [ -s "${ALL_RULES}.new" ] && diff "${ALL_RULES}" "${ALL_RULES}.new"; then
rm -f -- "${ALL_RULES}.new"
exit 0
fi
# Reset
# Filter
for chain in INPUT FORWARD OUTPUT; do
iptables -w -t filter -P "$chain" ACCEPT
iptables -w -t filter -N "ipt-helper-$chain" 2>/dev/null
iptables -w -t filter -F "ipt-helper-$chain"
iptables -w -t filter -D "$chain" -j "ipt-helper-$chain" 2>/dev/null # make sure it's number one
iptables -w -t filter -I "$chain" 1 -j "ipt-helper-$chain"
done
# NAT
for chain in INPUT OUTPUT PREROUTING POSTROUTING; do
iptables -w -t nat -P "$chain" ACCEPT
iptables -w -t nat -N "ipt-helper-$chain" 2>/dev/null
iptables -w -t nat -F "ipt-helper-$chain"
iptables -w -t nat -D "$chain" -j "ipt-helper-$chain" 2>/dev/null # make sure it's number one
iptables -w -t nat -I "$chain" 1 -j "ipt-helper-$chain"
done
# Mangle
for chain in INPUT FORWARD OUTPUT PREROUTING POSTROUTING; do
iptables -w -t mangle -P "$chain" ACCEPT
iptables -w -t mangle -N "ipt-helper-$chain" 2>/dev/null
iptables -w -t mangle -F "ipt-helper-$chain"
iptables -w -t mangle -D "$chain" -j "ipt-helper-$chain" 2>/dev/null # make sure it's number one
iptables -w -t mangle -I "$chain" 1 -j "ipt-helper-$chain"
done
# Apply
local LOGFILE=$(mktemp)
local DISABLED="/opt/openslx/iptables/rules.d/disabled/"
for file in /opt/openslx/iptables/rules.d/*; do
[ -f "$file" ] || continue
if [ ! -x "$file" ]; then
slxlog "firewall-script-exec" "The firewall script '$file' is not executable (+x), moving to disabled/"
mkdir -p "$DISABLED"
mv "$file" "$DISABLED"
continue
fi
# patch chain names, add "-w"
sed -i -r 's/ (-A|--append|-I|--insert|-D|--delete) +(PREROUTING|INPUT|FORWARD|OUTPUT|POSTROUTING) / \1 ipt-helper-\2 /g;s/iptables +-/iptables -w -/g' "$file"
if ! "$file" > "$LOGFILE" 2>&1; then
slxlog "firewall-script-apply" "The firewall script '$file' had nonzero exit code. Moving to disabled/" "$LOGFILE"
mkdir -p "$DISABLED"
mv "$file" "$DISABLED"
fi
done
# Add default rule
for chain in INPUT FORWARD OUTPUT; do
iptables -w -t filter -A "ipt-helper-$chain" -j RETURN
done
# NAT
for chain in INPUT OUTPUT PREROUTING POSTROUTING; do
iptables -w -t nat -A "ipt-helper-$chain" -j RETURN
done
# Mangle
for chain in INPUT FORWARD OUTPUT PREROUTING POSTROUTING; do
iptables -w -t mangle -A "ipt-helper-$chain" -j RETURN
done
# Do not just move file from above, as we sed'ed above and contents might have changed
rm -f -- "${ALL_RULES}.new"
for file in /opt/openslx/iptables/rules.d/*; do
[ -f "$file" ] || continue
cat "$file" >> "${ALL_RULES}.new"
done
mv -f -- "${ALL_RULES}.new" "${ALL_RULES}"
echo "iptables rules successfully updated."
rm -f -- "$LOCK"
exit 0
}
ID="$$+$RANDOM"
echo "$ID" > "$LOCK"
reload_rules "$ID" &
exit 0
|