From 621e49bb465f500cc46d47e39e828cf76d6381d7 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Tue, 24 Jul 2018 14:35:44 +0200 Subject: update vendor --- vendor/golang.org/x/net/ipv4/packet.go | 68 ++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 vendor/golang.org/x/net/ipv4/packet.go (limited to 'vendor/golang.org/x/net/ipv4/packet.go') diff --git a/vendor/golang.org/x/net/ipv4/packet.go b/vendor/golang.org/x/net/ipv4/packet.go new file mode 100644 index 0000000..966bb77 --- /dev/null +++ b/vendor/golang.org/x/net/ipv4/packet.go @@ -0,0 +1,68 @@ +// Copyright 2012 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 ipv4 + +import ( + "net" + + "golang.org/x/net/internal/socket" +) + +// BUG(mikio): On Windows, the ReadFrom and WriteTo methods of RawConn +// are not implemented. + +// A packetHandler represents the IPv4 datagram handler. +type packetHandler struct { + *net.IPConn + *socket.Conn + rawOpt +} + +func (c *packetHandler) ok() bool { return c != nil && c.IPConn != nil && c.Conn != nil } + +// ReadFrom reads an IPv4 datagram from the endpoint c, copying the +// datagram into b. It returns the received datagram as the IPv4 +// header h, the payload p and the control message cm. +func (c *packetHandler) ReadFrom(b []byte) (h *Header, p []byte, cm *ControlMessage, err error) { + if !c.ok() { + return nil, nil, nil, errInvalidConn + } + return c.readFrom(b) +} + +func slicePacket(b []byte) (h, p []byte, err error) { + if len(b) < HeaderLen { + return nil, nil, errHeaderTooShort + } + hdrlen := int(b[0]&0x0f) << 2 + return b[:hdrlen], b[hdrlen:], nil +} + +// WriteTo writes an IPv4 datagram through the endpoint c, copying the +// datagram from the IPv4 header h and the payload p. The control +// message cm allows the datagram path and the outgoing interface to be +// specified. Currently only Darwin and Linux support this. The cm +// may be nil if control of the outgoing datagram is not required. +// +// The IPv4 header h must contain appropriate fields that include: +// +// Version = +// Len = +// TOS = +// TotalLen = +// ID = platform sets an appropriate value if ID is zero +// FragOff = +// TTL = +// Protocol = +// Checksum = platform sets an appropriate value if Checksum is zero +// Src = platform sets an appropriate value if Src is nil +// Dst = +// Options = optional +func (c *packetHandler) WriteTo(h *Header, p []byte, cm *ControlMessage) error { + if !c.ok() { + return errInvalidConn + } + return c.writeTo(h, p, cm) +} -- cgit v1.2.3