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Update openwrt.md #36

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14 changes: 13 additions & 1 deletion openwrt.md
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,9 @@ WAN6和LAN分别改成外网IPv6和内网网卡(interface)的名字，注意不
default from 2402:f000:x:xxxx::/64 via fe80::xxxx:xxxx:xxxx:xxxx dev eth0 proto static metric 512
```

这样坑爹的网关，在转发NAT包的时候会有问题，需要把去掉`from 2402:f000:x:xxxx::/64`这一部分的以后的默认路由添加到路由表中。可以新建一个`/etc/hotplug.d/iface/99-ipv6`，它的内容是
这样坑爹的网关，在转发NAT包的时候会有问题，需要把去掉`from 2402:f000:x:xxxx::/64`这一部分的以后的默认路由添加到路由表中。
下面有两个方法可以选择
1. 可以新建一个`/etc/hotplug.d/iface/99-ipv6`，它的内容是

```bash
#!/bin/sh
Expand All @@ -72,3 +74,13 @@ logger -t IPv6 "Add IPv6 default route."
```
chmod +x /etc/hotplug.d/iface/99-ipv6
```

2. 新建 `/etc/odhcp6c.user`
如果上述内容不起作用（尤其是当你的 IPv6 WAN 是 wlanX 这种不能在 ifup 的时候就能获取到 IPv6 地址的情况下），你可以新建一个`/etc/odhcp6c.user`文件内容如下

```bash
#!/bin/sh
ip -6 route add `ip -6 route show default|sed -e 's/from [^ ]* //'`
logger -t IPv6 "Add IPv6 default route."
```
因为 odhcpd 负责 IPv6 地址的获取和添加，odchpd 启动时会调用 `/lib/netifd/dhcpv6.script`，在运行完毕后会执行 `/etc/odhcp6c.user`，我们借此修改路由