blob: aee1016ae720be39b8be3b3af7aade7df6dd557d (
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
|
#!/bin/sh
# Minimal Hetzner DNS updater for pfSense/FreeBSD
# - Always updates on startup (no pre-check)
# - Then polls and only updates when IP changes
# - Keeps last IP only in memory (no files)
# --- CONFIG ---------------------------------------------------------------
API_TOKEN="$(cat /usr/local/etc/hetzner_auth)"
ZONE_ID="{{ hetzner_zone_id }}"
RECORD_ID="{{ hetzner_record_id }}"
RECORD_NAME=pursotin
RECORD_TYPE="A"
IFACE_CMD="ifconfig epw1b"
POLL_INTERVAL=60
API_BASE="https://dns.hetzner.com/api/v1"
TTL="300"
# --------------------------------------------------------------------------
get_ip() {
# Expect FreeBSD-style ifconfig output; grab first IPv4 addr
# Example: 'inet 192.0.2.3 ...'
sh -c "$IFACE_CMD" 2>/dev/null | awk '/inet[[:space:]]/ {print $2; exit}'
}
update_record() {
ip="$1"
body=$(printf '{"type":"%s","name":"%s","value":"%s","zone_id":"%s","ttl":%s}' \
"$RECORD_TYPE" "$RECORD_NAME" "$ip" "$ZONE_ID" "$TTL")
http_code=$(
curl -sS -o /dev/null -w "%{http_code}" -X PUT \
-H "Content-Type: application/json" \
-H "Auth-API-Token: ${API_TOKEN}" \
--data "$body" \
"${API_BASE}/records/${RECORD_ID}"
)
[ "$http_code" = "200" ] || {
echo "$(date -u +"%F %T") update failed (HTTP $http_code)" >&2
return 1
}
echo "$(date -u +"%F %T") updated ${RECORD_NAME} to ${ip}"
return 0
}
# --- Startup: always update once (no check) --------------------------------
last_ip=""
ip="$(get_ip)"
if [ -n "$ip" ]; then
update_record "$ip" && last_ip="$ip"
else
echo "$(date -u +"%F %T") no IPv4 from: ${IFACE_CMD}; will retry..." >&2
fi
# --- Poll loop: update only on change --------------------------------------
while :; do
ip="$(get_ip)"
if [ -n "$ip" ] && [ "$ip" != "$last_ip" ]; then
if update_record "$ip"; then
last_ip="$ip"
fi
fi
sleep "$POLL_INTERVAL"
done
|
