问题
I want to be able to force a socket through a specific network interface. In Linux the kernel allows a programmer to achieve this by setting said socket option - but in OS X I'm in the dark.
And hence my title question - is it possible? Has it been done? I'm not looking into re-implementing the IP stack, just enabling the usage of the bind-to-interface option.
回答1:
Use the RFC 3542 interface for selecting outgoing interfaces (IPV6_PKTINFO). http://tools.ietf.org/html/rfc3542#section-6
来源：https://stackoverflow.com/questions/12439973/writing-an-os-x-kernel-extension-to-implement-linuxs-so-bindtodevice-socket-opt