Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 96 insertions, 0 deletions

diff --git a/src/net/rawconn.go b/src/net/rawconn.go
new file mode 100644
index 0000000..974320c
--- /dev/null
+++ b/src/net/rawconn.go
@@ -0,0 +1,96 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package net
+
+import (
+	"internal/poll"
+	"runtime"
+	"syscall"
+)
+
+// BUG(tmm1): On Windows, the Write method of syscall.RawConn
+// does not integrate with the runtime's network poller. It cannot
+// wait for the connection to become writeable, and does not respect
+// deadlines. If the user-provided callback returns false, the Write
+// method will fail immediately.
+
+// BUG(mikio): On JS and Plan 9, the Control, Read and Write
+// methods of syscall.RawConn are not implemented.
+
+type rawConn struct {
+	fd *netFD
+}
+
+func (c *rawConn) ok() bool { return c != nil && c.fd != nil }
+
+func (c *rawConn) Control(f func(uintptr)) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	err := c.fd.pfd.RawControl(f)
+	runtime.KeepAlive(c.fd)
+	if err != nil {
+		err = &OpError{Op: "raw-control", Net: c.fd.net, Source: nil, Addr: c.fd.laddr, Err: err}
+	}
+	return err
+}
+
+func (c *rawConn) Read(f func(uintptr) bool) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	err := c.fd.pfd.RawRead(f)
+	runtime.KeepAlive(c.fd)
+	if err != nil {
+		err = &OpError{Op: "raw-read", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
+	}
+	return err
+}
+
+func (c *rawConn) Write(f func(uintptr) bool) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	err := c.fd.pfd.RawWrite(f)
+	runtime.KeepAlive(c.fd)
+	if err != nil {
+		err = &OpError{Op: "raw-write", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
+	}
+	return err
+}
+
+// PollFD returns the poll.FD of the underlying connection.
+//
+// Other packages in std that also import internal/poll (such as os)
+// can use a type assertion to access this extension method so that
+// they can pass the *poll.FD to functions like poll.Splice.
+//
+// PollFD is not intended for use outside the standard library.
+func (c *rawConn) PollFD() *poll.FD {
+	if !c.ok() {
+		return nil
+	}
+	return &c.fd.pfd
+}
+
+func newRawConn(fd *netFD) (*rawConn, error) {
+	return &rawConn{fd: fd}, nil
+}
+
+type rawListener struct {
+	rawConn
+}
+
+func (l *rawListener) Read(func(uintptr) bool) error {
+	return syscall.EINVAL
+}
+
+func (l *rawListener) Write(func(uintptr) bool) error {
+	return syscall.EINVAL
+}
+
+func newRawListener(fd *netFD) (*rawListener, error) {
+	return &rawListener{rawConn{fd: fd}}, nil
+}