ubuntu network manager dispatcher proxy auto setup

90-proxy-autoset

#!/bin/bash
# /etc/NetworkManager/dispatcher.d/90-proxy-autoset

IFACE="$1"
STATUS="$2"
USER_NAME="serg"
USER_ID=$(id -u "$USER_NAME")

run_as_user() {
	sudo -u "$USER_NAME" \
		DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/$USER_ID/bus" \
		"$@"
}

update_hosts_entry() {
	local hostname="$1"	   # пример: myserver.local
	local ip="$2"			 # пример: $GATEWAY
	local hosts_file="/etc/hosts"

	# Проверка на пустые аргументы
	if [[ -z "$hostname" || -z "$ip" ]]; then
		echo "update_hosts_entry: hostname or ip not provided"
		return 1
	fi

	# Создание бэкапа
	cp "$hosts_file" "$hosts_file.bak"

	# Удалить существующие строки с этим hostname
	sed -i "/[[:space:]]$hostname$/d" "$hosts_file"

	# Добавить новую строку
	echo "$ip $hostname" >> "$hosts_file"

	echo "update_hosts_entry: set $hostname -> $ip"
}

set_apt_proxy() {
	local mode="$1"  # "on" или "off"
	local apt_proxy_file="/etc/apt/apt.conf.d/01proxy"

	if [[ "$mode" == "on" ]]; then
		local proxy_host="$2"
		local proxy_port="$3"

		if [[ -z "$proxy_host" || -z "$proxy_port" ]]; then
			echo "set_apt_proxy: host or port not specified for 'on' mode"
			return 1
		fi

		local proxy_url="http://$proxy_host:$proxy_port"

		{
			echo "Acquire::http::Proxy \"$proxy_url/\";"
			echo "Acquire::https::Proxy \"$proxy_url/\";"
		} > "$apt_proxy_file"

		echo "set_apt_proxy: enabled $proxy_url"

	elif [[ "$mode" == "off" ]]; then
		rm -f "$apt_proxy_file"
		echo "set_apt_proxy: proxy disabled"
	else
		echo "set_apt_proxy: unknown mode '$mode'"
		return 1
	fi
}

set_env_proxy() {
	local mode="$1"  # "on" или "off"
	local proxy_host="$2"
	local proxy_port="$3"
	local proxy_url="http://$proxy_host:$proxy_port"

	local env_file="/etc/environment"

	if [[ "$mode" == "on" ]]; then
		# Удалить старые переменные, если есть
		sed -i '/^http_proxy=/d' "$env_file"
		sed -i '/^https_proxy=/d' "$env_file"

		# Добавить новые
		{
			echo "http_proxy=\"$proxy_url/\""
			echo "https_proxy=\"$proxy_url/\""
		} >> "$env_file"

		export http_proxy="$proxy_url/"
		export https_proxy="$proxy_url/"

		echo "set_env_proxy: enabled $proxy_url"

	elif [[ "$mode" == "off" ]]; then
		sed -i '/^http_proxy=/d' "$env_file"
		sed -i '/^https_proxy=/d' "$env_file"

		unset http_proxy
		unset https_proxy

		echo "set_env_proxy: disabled"

	else
		echo "set_env_proxy: unknown mode '$mode'"
		return 1
	fi
}


LOG="/var/log/proxy-autoset.log"
echo "$(date): Interface=$IFACE, Status=$STATUS" >> "$LOG"

# Проверяем, что интерфейс — это Wi-Fi (wlp2s0) и статус — "up"
if [ "$IFACE" = "wlp2s0" ] && [ "$STATUS" = "up" ]; then
	# Определим SSID
	SSID=$(iwgetid -r)
	
	# Получим IP шлюза
	GATEWAY=$(ip route | grep default | grep "$IFACE" | awk '{print $3}')
	
	echo "$(date): SSID=$SSID, Gateway=$GATEWAY" >> "$LOG"
	
	# Пример логики: если определённый SSID и шлюз, установить прокси
	if [ "$SSID" = "MOTOx113" ] || [ "$SSID" = "HONORx113" ]; then
		PROXY_PORT=8117
		PROXY_HOST="privoxy.local"

		echo "$(date): Setting WORK proxy" >> "$LOG"
		
		# Установка системного прокси (для GNOME)
		run_as_user gsettings set org.gnome.system.proxy mode 'manual'
		run_as_user gsettings set org.gnome.system.proxy.http host "$PROXY_HOST"
		run_as_user gsettings set org.gnome.system.proxy.http port $PROXY_PORT
		run_as_user gsettings set org.gnome.system.proxy.https host "$PROXY_HOST"
		run_as_user gsettings set org.gnome.system.proxy.https port $PROXY_PORT
		
		# 
		set_apt_proxy on "$PROXY_HOST" $PROXY_PORT
		
		# 
		set_env_proxy on "$PROXY_HOST" $PROXY_PORT
		
		# 
		update_hosts_entry "$PROXY_HOST" "$GATEWAY"
	else
		echo "$(date): Disabling proxy" >> "$LOG"
		
		# 
		run_as_user gsettings set org.gnome.system.proxy mode 'none'

		# 
		set_env_proxy off

		# 
		set_apt_proxy off
	fi

	if [ "$SSID" = "MOTOx113" ]; then
		update_hosts_entry "moto50f.local" "$GATEWAY"
	fi

fi