From 69f0fe67b63d90e523a5a1241fb1b46c2e8dbe03 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Sun, 3 Mar 2019 04:04:41 +0100
Subject: global: begin modularization

---
 uapi_linux.go | 199 ----------------------------------------------------------
 1 file changed, 199 deletions(-)
 delete mode 100644 uapi_linux.go

(limited to 'uapi_linux.go')

diff --git a/uapi_linux.go b/uapi_linux.go
deleted file mode 100644
index d4b89fc..0000000
--- a/uapi_linux.go
+++ /dev/null
@@ -1,199 +0,0 @@
-/* SPDX-License-Identifier: MIT
- *
- * Copyright (C) 2017-2019 WireGuard LLC. All Rights Reserved.
- */
-
-package main
-
-import (
-	"errors"
-	"fmt"
-	"golang.org/x/sys/unix"
-	"golang.zx2c4.com/wireguard/rwcancel"
-	"net"
-	"os"
-	"path"
-)
-
-var socketDirectory = "/var/run/wireguard"
-
-const (
-	ipcErrorIO        = -int64(unix.EIO)
-	ipcErrorProtocol  = -int64(unix.EPROTO)
-	ipcErrorInvalid   = -int64(unix.EINVAL)
-	ipcErrorPortInUse = -int64(unix.EADDRINUSE)
-	socketName        = "%s.sock"
-)
-
-type UAPIListener struct {
-	listener        net.Listener // unix socket listener
-	connNew         chan net.Conn
-	connErr         chan error
-	inotifyFd       int
-	inotifyRWCancel *rwcancel.RWCancel
-}
-
-func (l *UAPIListener) Accept() (net.Conn, error) {
-	for {
-		select {
-		case conn := <-l.connNew:
-			return conn, nil
-
-		case err := <-l.connErr:
-			return nil, err
-		}
-	}
-}
-
-func (l *UAPIListener) Close() error {
-	err1 := unix.Close(l.inotifyFd)
-	err2 := l.inotifyRWCancel.Cancel()
-	err3 := l.listener.Close()
-	if err1 != nil {
-		return err1
-	}
-	if err2 != nil {
-		return err2
-	}
-	return err3
-}
-
-func (l *UAPIListener) Addr() net.Addr {
-	return l.listener.Addr()
-}
-
-func UAPIListen(name string, file *os.File) (net.Listener, error) {
-
-	// wrap file in listener
-
-	listener, err := net.FileListener(file)
-	if err != nil {
-		return nil, err
-	}
-
-	if unixListener, ok := listener.(*net.UnixListener); ok {
-		unixListener.SetUnlinkOnClose(true)
-	}
-
-	uapi := &UAPIListener{
-		listener: listener,
-		connNew:  make(chan net.Conn, 1),
-		connErr:  make(chan error, 1),
-	}
-
-	// watch for deletion of socket
-
-	socketPath := path.Join(
-		socketDirectory,
-		fmt.Sprintf(socketName, name),
-	)
-
-	uapi.inotifyFd, err = unix.InotifyInit()
-	if err != nil {
-		return nil, err
-	}
-
-	_, err = unix.InotifyAddWatch(
-		uapi.inotifyFd,
-		socketPath,
-		unix.IN_ATTRIB|
-			unix.IN_DELETE|
-			unix.IN_DELETE_SELF,
-	)
-
-	if err != nil {
-		return nil, err
-	}
-
-	uapi.inotifyRWCancel, err = rwcancel.NewRWCancel(uapi.inotifyFd)
-	if err != nil {
-		unix.Close(uapi.inotifyFd)
-		return nil, err
-	}
-
-	go func(l *UAPIListener) {
-		var buff [0]byte
-		for {
-			// start with lstat to avoid race condition
-			if _, err := os.Lstat(socketPath); os.IsNotExist(err) {
-				l.connErr <- err
-				return
-			}
-			_, err := uapi.inotifyRWCancel.Read(buff[:])
-			if err != nil {
-				l.connErr <- err
-				return
-			}
-		}
-	}(uapi)
-
-	// watch for new connections
-
-	go func(l *UAPIListener) {
-		for {
-			conn, err := l.listener.Accept()
-			if err != nil {
-				l.connErr <- err
-				break
-			}
-			l.connNew <- conn
-		}
-	}(uapi)
-
-	return uapi, nil
-}
-
-func UAPIOpen(name string) (*os.File, error) {
-
-	// check if path exist
-
-	err := os.MkdirAll(socketDirectory, 0755)
-	if err != nil && !os.IsExist(err) {
-		return nil, err
-	}
-
-	// open UNIX socket
-
-	socketPath := path.Join(
-		socketDirectory,
-		fmt.Sprintf(socketName, name),
-	)
-
-	addr, err := net.ResolveUnixAddr("unix", socketPath)
-	if err != nil {
-		return nil, err
-	}
-
-	oldUmask := unix.Umask(0077)
-	listener, err := func() (*net.UnixListener, error) {
-
-		// initial connection attempt
-
-		listener, err := net.ListenUnix("unix", addr)
-		if err == nil {
-			return listener, nil
-		}
-
-		// check if socket already active
-
-		_, err = net.Dial("unix", socketPath)
-		if err == nil {
-			return nil, errors.New("unix socket in use")
-		}
-
-		// cleanup & attempt again
-
-		err = os.Remove(socketPath)
-		if err != nil {
-			return nil, err
-		}
-		return net.ListenUnix("unix", addr)
-	}()
-	unix.Umask(oldUmask)
-
-	if err != nil {
-		return nil, err
-	}
-
-	return listener.File()
-}
-- 
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