From 42f28ab8e374137fe3f5d25424489d879d4724f8 Mon Sep 17 00:00:00 2001 From: Christopher Speller Date: Wed, 21 Jun 2017 19:06:17 -0700 Subject: Updating server dependancies (#6712) --- vendor/golang.org/x/net/ipv4/batch.go | 191 ++++++++++++++++++++++++++++++++++ 1 file changed, 191 insertions(+) create mode 100644 vendor/golang.org/x/net/ipv4/batch.go (limited to 'vendor/golang.org/x/net/ipv4/batch.go') diff --git a/vendor/golang.org/x/net/ipv4/batch.go b/vendor/golang.org/x/net/ipv4/batch.go new file mode 100644 index 000000000..b44549928 --- /dev/null +++ b/vendor/golang.org/x/net/ipv4/batch.go @@ -0,0 +1,191 @@ +// 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. + +// +build go1.9 + +package ipv4 + +import ( + "net" + "runtime" + "syscall" + + "golang.org/x/net/internal/socket" +) + +// BUG(mikio): On Windows, the ReadBatch and WriteBatch methods of +// PacketConn are not implemented. + +// BUG(mikio): On Windows, the ReadBatch and WriteBatch methods of +// RawConn are not implemented. + +// A Message represents an IO message. +// +// type Message struct { +// Buffers [][]byte +// OOB []byte +// Addr net.Addr +// N int +// NN int +// Flags int +// } +// +// The Buffers fields represents a list of contiguous buffers, which +// can be used for vectored IO, for example, putting a header and a +// payload in each slice. +// When writing, the Buffers field must contain at least one byte to +// write. +// When reading, the Buffers field will always contain a byte to read. +// +// The OOB field contains protocol-specific control or miscellaneous +// ancillary data known as out-of-band data. +// It can be nil when not required. +// +// The Addr field specifies a destination address when writing. +// It can be nil when the underlying protocol of the endpoint uses +// connection-oriented communication. +// After a successful read, it may contain the source address on the +// received packet. +// +// The N field indicates the number of bytes read or written from/to +// Buffers. +// +// The NN field indicates the number of bytes read or written from/to +// OOB. +// +// The Flags field contains protocol-specific information on the +// received message. +type Message = socket.Message + +// ReadBatch reads a batch of messages. +// +// The provided flags is a set of platform-dependent flags, such as +// syscall.MSG_PEEK. +// +// On a successful read it returns the number of messages received, up +// to len(ms). +// +// On Linux, a batch read will be optimized. +// On other platforms, this method will read only a single message. +// +// Unlike the ReadFrom method, it doesn't strip the IPv4 header +// followed by option headers from the received IPv4 datagram when the +// underlying transport is net.IPConn. Each Buffers field of Message +// must be large enough to accommodate an IPv4 header and option +// headers. +func (c *payloadHandler) ReadBatch(ms []Message, flags int) (int, error) { + if !c.ok() { + return 0, syscall.EINVAL + } + switch runtime.GOOS { + case "linux": + n, err := c.RecvMsgs([]socket.Message(ms), flags) + if err != nil { + err = &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err} + } + return n, err + default: + n := 1 + err := c.RecvMsg(&ms[0], flags) + if err != nil { + n = 0 + err = &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err} + } + return n, err + } +} + +// WriteBatch writes a batch of messages. +// +// The provided flags is a set of platform-dependent flags, such as +// syscall.MSG_DONTROUTE. +// +// It returns the number of messages written on a successful write. +// +// On Linux, a batch write will be optimized. +// On other platforms, this method will write only a single message. +func (c *payloadHandler) WriteBatch(ms []Message, flags int) (int, error) { + if !c.ok() { + return 0, syscall.EINVAL + } + switch runtime.GOOS { + case "linux": + n, err := c.SendMsgs([]socket.Message(ms), flags) + if err != nil { + err = &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err} + } + return n, err + default: + n := 1 + err := c.SendMsg(&ms[0], flags) + if err != nil { + n = 0 + err = &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err} + } + return n, err + } +} + +// ReadBatch reads a batch of messages. +// +// The provided flags is a set of platform-dependent flags, such as +// syscall.MSG_PEEK. +// +// On a successful read it returns the number of messages received, up +// to len(ms). +// +// On Linux, a batch read will be optimized. +// On other platforms, this method will read only a single message. +func (c *packetHandler) ReadBatch(ms []Message, flags int) (int, error) { + if !c.ok() { + return 0, syscall.EINVAL + } + switch runtime.GOOS { + case "linux": + n, err := c.RecvMsgs([]socket.Message(ms), flags) + if err != nil { + err = &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err} + } + return n, err + default: + n := 1 + err := c.RecvMsg(&ms[0], flags) + if err != nil { + n = 0 + err = &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err} + } + return n, err + } +} + +// WriteBatch writes a batch of messages. +// +// The provided flags is a set of platform-dependent flags, such as +// syscall.MSG_DONTROUTE. +// +// It returns the number of messages written on a successful write. +// +// On Linux, a batch write will be optimized. +// On other platforms, this method will write only a single message. +func (c *packetHandler) WriteBatch(ms []Message, flags int) (int, error) { + if !c.ok() { + return 0, syscall.EINVAL + } + switch runtime.GOOS { + case "linux": + n, err := c.SendMsgs([]socket.Message(ms), flags) + if err != nil { + err = &net.OpError{Op: "write", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err} + } + return n, err + default: + n := 1 + err := c.SendMsg(&ms[0], flags) + if err != nil { + n = 0 + err = &net.OpError{Op: "write", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err} + } + return n, err + } +} -- cgit v1.2.3-1-g7c22