mirror of
https://github.com/kiddin9/op-packages.git
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43 lines
1.1 KiB
Bash
Executable File
43 lines
1.1 KiB
Bash
Executable File
#!/bin/sh
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# shellcheck shell=dash
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# Reverse DNS lookup for an IP address.
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# Usage: trafficctl-rdns.sh <ip>
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# Output: {"ip":"...","host":"..."}
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. /usr/local/bin/trafficctl-fw.sh
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IP="$1"
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if [ -z "$IP" ]; then
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echo '{"ip":"","host":""}'
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exit 1
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fi
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if ! tctl_validate_ip "$IP"; then
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echo "{\"ip\":\"$IP\",\"host\":\"\"}"
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exit 1
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fi
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HOST=""
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# Try ubus network.rrdns (same resolver the LuCI frontend uses; always available via rpcd)
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if command -v ubus >/dev/null 2>&1; then
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HOST=$(ubus call network.rrdns lookup \
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"{\"addrs\":[\"$IP\"],\"timeout\":2000,\"limit\":1}" 2>/dev/null \
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fi
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# Fallback: BusyBox nslookup (always available on OpenWrt)
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if [ -z "$HOST" ] && command -v nslookup >/dev/null 2>&1; then
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HOST=$(nslookup "$IP" 2>/dev/null | sed -n 's/.*name = \(.*\)\.$/\1/p' | head -1)
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fi
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# Validate hostname (only allow safe chars)
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case "$HOST" in
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*[!a-zA-Z0-9._-]*|"") HOST="" ;;
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esac
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if [ -z "$HOST" ]; then
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echo "{\"ip\":\"$IP\",\"host\":\"\"}"
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else
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echo "{\"ip\":\"$IP\",\"host\":\"$HOST\"}"
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fi
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