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RFC 7413 TCP Fast Open support for Go.
go get github.com/database64128/tfo-go/v2tfo-go's Windows support requires extensive usage of //go:linkname to access Go runtime internals, as there's currently no public API for Windows async IO in the standard library. Unfortunately, the Go team has decided to lock down future uses of linkname, starting with Go 1.23. And our bid to get the linknames we need exempted was partially rejected. Therefore, we had to make the following changes:
- Windows support is gated behind the build tag tfogo_checklinkname0 when building with Go 1.23 and later.
- With Go 1.21 and 1.22, tfo-go v2.2.x still provides full Windows support, with or without the build tag.
- With Go 1.23 and later, when the build tag is not specified, tfo-go only supports listen with TFO on Windows. To get full TFO support on Windows, the build tag tfogo_checklinkname0 must be specified along with linker flag -checklinkname=0 to disable the linkname check.