2023-08-16 20:39:02 +02:00
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#!/bin/bash
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2023-11-18 19:18:15 +01:00
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source /usr/share/yunohost/helpers
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is_nat_set() {
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local gateway_interface=${1}
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iptables -w -nvt nat -L POSTROUTING | grep MASQUERADE | grep -q "${gateway_interface}"
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}
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unset_nat() {
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local gateway_interface=${1}
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iptables -w -t nat -D POSTROUTING -o "${gateway_interface}" -j MASQUERADE
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}
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set_nat() {
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local gateway_interface=${1}
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iptables -w -t nat -A POSTROUTING -o "${gateway_interface}" -j MASQUERADE
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}
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2023-11-18 21:42:48 +01:00
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if systemctl is-active __SERVICE_NAME__; then
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2023-11-19 15:33:13 +01:00
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old_gateway_interface=$(ynh_app_setting_get --app=__APP__ --key=gateway_interface)
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2023-11-18 21:42:48 +01:00
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new_gateway_interface=$(ip route get 1.2.3.4 | awk '{ print $5; }')
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2023-11-18 19:18:15 +01:00
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2023-11-18 21:42:48 +01:00
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if [[ -n "$old_gateway_interface" ]] && [[ "$old_gateway_interface" != "$new_gateway_interface" ]] && is_nat_set "$old_gateway_interface"; then
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unset_nat "${old_gateway_interface}"
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fi
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2023-11-18 19:18:15 +01:00
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2023-11-18 21:45:01 +01:00
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if [[ -n "$new_gateway_interface" ]] && ! is_nat_set $new_gateway_interface; then
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set_nat "${new_gateway_interface}"
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fi
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2023-11-18 19:18:15 +01:00
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2023-11-18 21:42:48 +01:00
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ynh_app_setting_set --app=__APP__ --key=gateway_interface --value="${new_gateway_interface}"
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fi
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