Fix: icmp interface binding #524
Merged
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背景
实现自定义的ICMP消息处理后,其他应用在使用tun2socks代码库时,当需要发送ICMP消息时,需要网卡绑定功能。 但原有的代码逻辑只支持TCP和UDP协议的网卡绑定。
实现
添加ICMP协议判断,以支持ICMP协议的网卡绑定功能。