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48359f4f60
This change provides message IO functionality that may support the construction of modern datagram transport protocols. The modern datagram transport protocols on a multihomed node basically need to control each packet path for traffic engineering by using information belongs to network- or link-layer implementation. In addtion, it's desirable to be able to do simultaneous transmission across multiple network- or link-layer adjacencies wihtout any additional cost. The ReadBatch and WriteBatch methods of PacketConn can be used to read and write an IO message that contains the information of network- or link-layer implementation, and read and write a batch of IO messages on Linux. The Marshal and Parse methods of ControlMessage can help to marshal and parse information contained in IO messages. Updates golang/go#3661. Change-Id: I94484e2e135f4969ddf5c2548bf6be0cc16888bf Reviewed-on: https://go-review.googlesource.com/38276 Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
24 lines
578 B
Go
24 lines
578 B
Go
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ipv6
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import (
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"net"
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"golang.org/x/net/internal/socket"
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)
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// BUG(mikio): On Windows, the ControlMessage for ReadFrom and WriteTo
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// methods of PacketConn is not implemented.
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// A payloadHandler represents the IPv6 datagram payload handler.
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type payloadHandler struct {
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net.PacketConn
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*socket.Conn
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rawOpt
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}
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func (c *payloadHandler) ok() bool { return c != nil && c.PacketConn != nil && c.Conn != nil }
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