是ipv6向下兼容ipv4？ [英] is ipv6 backward compatable with ipv4?

问题描述

我有一个使用ipv4编写的一个udp示例程序。如果我改变代码为ipv6我仍然能够与任何人使用监听器与ipv4地址通信？我正在查看移植示例

I've got a little udp example program written using ipv4. If I alter the code to ipv6 would I still be able to communicate with anyone using the listener with an ipv4 address? I was looking at porting examples at

http://ou800doc.caldera.com/en/SDK_netapi/sockC.PortIPv4appIPv6.html

我不确定是否改变代码将确保它工作，或者如果我必须写在决斗栈模式。

I'm not sure if simply altering the code would ensure that it worked or if I'd have to write it in duel-stack mode.

推荐答案

是和否... IPv6包含完全不同的地址，因此您必须重新编码您的应用程序，

Yes and no... IPv6 does contain completely different addressing, so you'll have to recode your app to use the alternative headers and structure sizes.

但是，IPv4地址范围在IPv6中可用，语法是在标准地址之前添加两个冒号（例如:: 10.11.12.13 ）。您还可以在IPv6数据包中嵌入IPv4地址。

However, the IPv4 address range is available within IPv6, the syntax is to add two colons before the standard address (eg ::10.11.12.13). You can also embed IPv4 addresses within IPv6 packets.

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