OpenWRT 添加靜態ARP (ARP綁定)

OpenWRT 添加靜態ARP (ARP綁定)

在路由器上爲我的主機添加一條靜態ARP條目

arp -s 192.168.1.99 00:24:1d:d4:a1:e8
arp -i br-lan -s 192.168.1.99 00:24:1d:d4:a1:e8

或者

ip neigh add 192.168.1.99 lladdr 00:24:1d:d4:a1:e8 nud permanent dev br-lan

(nud permanent表明是永久性的,除非你手動刪除這個條目, 或者系統重啓)
用arp -s 命令設置過後, ip neigh show 就顯示 PERMANENT 了

cat /proc/net/arp 顯示 Flags 爲 6

前提是 busybox必須包含了 arp 這兩個命令, 默認情況下arp命令只能查看,不能修改arp表

編譯是, 在 Base System –> busybox –> Network Utilities 下 選中arp

busybox中ip 命令不夠完整
必須安裝 iproute2 (就是 ip命令)

顯示arp條目的命令是

arp -a

或者

ip neigh show

完整的arp命令在 net-tools 中實現

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openwrt參考連接

https://github.com/981213/luci-1/commit/5bdd4b8edff904753d6a26137894e265d17b905b

1. 啓動腳本

applications/luci-app-arpbind/root/etc/init.d/arpbind

+#!/bin/sh /etc/rc.common
+# OpenWrt 靜態ARP綁定 啓動腳本
+# Copyright (C) 2015 GuoGuo <[email protected]>
+
+. /lib/functions.sh
+. /lib/functions/network.sh
+
+#清除單接口ARP
+#參數：$1:接口名稱
+if_clean_arp()
+{
+   [ -z "$1" ] && return
+   ip link set arp off dev $1
+   ip link set arp on dev $1
+}
+
+#清除系統所有ARP
+#參數：無
+clean_arp()
+{
+   for i in $(ls /sys/class/net)
+   do
+       if_clean_arp $i
+   done
+}
+
+#添加靜態ARP綁定
+#參數：$1:IP地址 $2:MAC地址 $3:接口名稱
+add_arp()
+{
+   [ -z "$1" ] || [ -z "$2" ] || [ -z "$3" ] && return
+   echo "Adding ARP:IP Addr:$1  MAC Addr:$2  Interface:$3"
+   ip neigh add $1 lladdr $2 nud permanent dev $3
+}
+
+arpconf_foreach()
+{
+   config_get ipaddr "$1" 'ipaddr'
+   config_get macaddr "$1" 'macaddr'
+   config_get ifname "$1" 'ifname'
+   [ -z "$ifname" ] && return
+   add_arp $ipaddr $macaddr $ifname
+}
+
+start()
+{
+   config_load 'arpbind'
+   config_foreach arpconf_foreach 'arpbind'
+}
+
+stop()
+{
+   clean_arp
+}
+

2. luci包

applications/luci-app-arpbind/Makefile

+#
+# Copyright (C) 2008-2014 The LuCI Team <[email protected]>
+#
+# This is free software, licensed under the Apache License, Version 2.0 .
+#
+
+include $(TOPDIR)/rules.mk
+
+LUCI_TITLE:=ARP Binding
+LUCI_DEPENDS:=+ip-full
+
+include ../../luci.mk
+
+# call BuildPackage - OpenWrt buildroot signature
+