Building a net Conn Type From the Ground Up

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" summary

Implements a Linux AF_VSOCK net.Conn and net.Listener using raw BSD socket syscalls (socket, bind, connect, accept4), the golang.org/x/sys/unix package and OS newfile wrappers, integrates with the runtime network poll so non‑blocking I/O, deadlines and concurrent Close/Accept unblock correctly, and satisfies net.Error by translating syscall errors. Tests use x/net/nettest and the result serves HTTP and gRPC over AF_VSOCK successfully (works on Go 1.12+ with the accept4 raw‑read hook).

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" chapters (20)

1. 0:00Intro
2. 0:30Package net
3. 0:58What is a "stream-oriented" connection?
4. 1:56What about other socket types?
5. 4:05The BSD Sockets API
6. 5:03net. Addr and net. Conn interfaces
7. 5:33net. Addr and net. Conn implementations
8. 8:12The initial conn type
9. 8:27net.Listener interface
10. 10:44The initial listener type
11. 12:09Non-blocking I/O
12. 13:16How does the runtime network poller work?
13. 14:29The runtime network poller in summary
14. 14:53Accessing the runtime network poller
15. 16:07os. NewFile with a non-blocking file
16. 16:41Testing net.Conn compliance
17. 17:08net. Error compliance
18. 17:59Non-blocking accept4(2)
19. 19:10Testing net.Listener compliance
20. 22:26The possibilities are endless

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