多网络配置切换管理器

network_switcher.sh

#!/bin/bash
# date:    2017-04-23
# author:  nanpuyue <[email protected]> https://blog.nanpuyue.com

CONF_FILE=~/.config/network_switcher.conf
RESERVED_UUID="defa5e5c-16c4-426d-83ea-aa187f6e2ea6"

read_conf(){
	if [[ ! -f "$CONF_FILE" ]]; then
		touch "$CONF_FILE"
	fi
	case "$1" in
		"netcard")
			cat "$CONF_FILE"|grep -Po "(?<=$RESERVED_UUID\s).*"
		;;
		"network")
			cat "$CONF_FILE"|grep -v "$RESERVED_UUID"
		;;
		*)
			cat "$CONF_FILE"|grep -P "^$1\s"
		;;
	esac
}

edit_conf(){
	sed -ri "s/^$1\s+.*$/$*/g" "$CONF_FILE" && \
	zenity --notification --window-icon="info" \
		--text="\n已修改选定的网络配置"
}

del_conf(){
	sed -ri "/^$1\s+.*$/d" "$CONF_FILE" && \
	zenity --notification --window-icon="info" \
		--text="\n已删除选定的网络配置"
}

select_network(){
	local uuid=$(zenity --list --width=600 --height=400 --title="选择网络配置" \
		--text="选中并单击确定，或直接双击选择" --hide-column="1" \
		--column="UUID" --column="名称" --column="IP地址" --column="子网掩码" --column="默认网关" --column="DNS" \
		$(read_conf "network") \
		"$@" \
	)
	echo "$uuid"
}

edit_network(){
	local uuid=$(select_network)
	if [[ -n "$uuid" ]]; then
		local conf=$(zenity --list --width=600 --height=400 --title="编辑网络配置" \
			--text="双击编辑，各栏均不能留空，单击空白处或回车完成编辑\n如无 DNS 填 0，多个 DNS 以英文分号分割，单击确定保存" \
			--editable --print-column=all --hide-column="1" \
			--column="UUID" --column="名称" --column="IP地址" --column="子网掩码" --column="默认网关" --column="DNS" \
			$(read_conf "$uuid") \
			"d" "删除此网络配置"|\
				tr -d " "|tr "|" " "
		)
		if [[ -n "$conf" ]]; then
			case "$conf" in
				"d "*)
					del_conf "$uuid"
				;;
				*)
					edit_conf $conf
				;;
			esac
		fi
	fi
}

new_network(){
	local conf=$(zenity --forms --title="新建网络配置" \
		--text="以下各栏均不能留空，单击确定保存\n如无 DNS 填 0，多个 DNS 以英文分号分割" \
		--add-entry="名称" --add-entry="IP地址" --add-entry="子网掩码" --add-entry="默认网关" --add-entry="DNS"|\
			tr -d " "|tr "|" " "
	)
	local conf_name=$(echo $conf|awk '{printf $1}')
	local conf_ip=$(echo $conf|awk '{printf $2}')
	if [[ -n "$conf" ]]; then
		echo $(cat /proc/sys/kernel/random/uuid) $conf >> "$CONF_FILE" && \
			zenity --notification --window-icon="info" \
				--text="\n已添加网络配置: $conf_name ( $conf_ip )"
	fi
}

mask_to_prefix(){
	local num=0
	for n in ${1//./ };do
		if (( $n < 128 )) && (( $n != 0 ));then
			exit 1
		elif [[ $(echo "obase=2;$n"|bc) =~ ^(1*)0*$ ]];then
			if (( $(( $num % 8 )) == 0 ));then
				num=$(( $num + ${#BASH_REMATCH[1]} ))
			elif (( ${#BASH_REMATCH[1]} > 0 ));then
				exit 1
			fi
		else
			exit 1
		fi
	done
	echo $num
}

switch_network(){
	local conf_uuid=$(select_network)
	local netcard=$(read_conf "netcard")
	if [[ -n "$conf_uuid" ]] && [[ -z "$netcard" ]]; then
		set_netcard
		netcard=$(read_conf "netcard")
	fi
	if [[ -n "$conf_uuid" ]] && [[ -n "$netcard" ]]; then
		local conf=$(read_conf $conf_uuid)
		local conf_ip=$(echo $conf|awk '{printf $3}')
		local conf_mask=$(echo $conf|awk '{printf $4}')
		local conf_prefix=$(mask_to_prefix $conf_mask)
		local conf_gateway=$(echo $conf|awk '{printf $5}')
		local conf_dns=$(echo $conf|awk '{printf $6}'|tr ";" " ")
		[[ "$conf_dns" =~ ^([0-9]+\.){3}[0-9]+ ]] || conf_dns=""
		local con_uuid=$(nmcli con show|grep -P "$netcard\s*$"|awk '{printf $2}')
		nmcli con mod "$con_uuid" ipv4.method "manual"
		nmcli con mod "$con_uuid" ipv4.address "$conf_ip/$conf_prefix"
		nmcli con mod "$con_uuid" ipv4.gateway "$conf_gateway"
		nmcli con mod "$con_uuid" ipv4.dns "$conf_dns"
		sh -c "nmcli con down $con_uuid && nmcli con up $con_uuid" && \
			zenity --info --title="网络配置已切换" \
				--text="\nIP地址:\t$conf_ip\n掩码:\t$conf_mask\n网关:\t$conf_gateway\nDNS:\t${conf_dns:=无}"
		exit 0
	fi
}

set_netcard(){
	local current=$(read_conf "netcard")
	local netcard=$(zenity --list --height=300 --hide-header --title="请选择默认网卡" \
		--text="当前默认网卡：$current" \
		--column="网卡" \
		$(ls /sys/class/net) \
	)
	if [[ -n "$netcard" ]]; then
		if [[ $(cat "$CONF_FILE"|grep $RESERVED_UUID) ]]; then
			sed -i "s/^\($RESERVED_UUID\).*$/\1\ $netcard/g" "$CONF_FILE"
		else
			echo "$RESERVED_UUID $netcard" >> "$CONF_FILE"
		fi
		zenity --notification --window-icon="info" \
			--text="\n已设置默认网卡为: $netcard"
	fi
}

select_operation(){
	local operation=$(zenity --list --height=250 \
		--title="请选择操作" \
		--text="选中并单击确定，或直接双击" \
		--hide-header --hide-column="1" \
		--column="序号" --column="操作" \
		"1" "切换网络配置" \
		"2" "编辑网络设置" \
		"3" "新建网络配置" \
		"4" "设置默认网卡" \
	)

	case "$operation" in
		"1")
			switch_network
		;;
		"2")
			edit_network
		;;
		"3")
			new_network
		;;
		"4")
			set_netcard
		;;
		*)
			exit 0
		;;
	esac
	select_operation
}

select_operation