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wg-netns/extras/wg-resolve/wg-resolve.sh

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#!/bin/sh
set -eu
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# dependencies: cut, getent, ip, ping and wg
WG_ENDPOINT_DOMAIN="${WG_ENDPOINT%%:*}"
WG_ENDPOINT_PORT="${WG_ENDPOINT##*:}"
if ! ip netns exec "$WG_NAMESPACE" ping -q -c 1 -W "${WG_TIMEOUT:-5}" "$WG_GATEWAY"; then
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echo 'probe failed, resolving endpoint'
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ip netns exec "$WG_NAMESPACE" wg set "$WG_INTERFACE" peer "$WG_PEER" endpoint "$(getent hosts -- "$WG_ENDPOINT_DOMAIN" | cut -d ' ' -f 1):$WG_ENDPOINT_PORT"
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fi