Update gvisor to v0.0.0-20211020211948-f76a604701b6, which requires some
changes to tun.go:
WriteRawPacket: Add function with not implemented error.
CreateNetTUN: Replace stack.AddAddress with stack.AddProtocolAddress, and
fix IPv6 address in error message.
Signed-off-by: Mikael Magnusson <mikma@users.sourceforge.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
The Go linker isn't smart enough to prevent gvisor from being pulled
into modules that use other parts of tun/, due to the types exposed. So,
we put this into its own standalone module.
We use this as an opportunity to introduce some example code as well.
I'm still not happy that this not only clutters this repo's go.sum, but
all the other projects that consume it, but it seems like making a new
module inside of this repo will lead to even greater confusion.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
