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Diffstat (limited to 'vendor/golang.org/x/net/ipv4/header.go')
-rw-r--r--vendor/golang.org/x/net/ipv4/header.go158
1 files changed, 0 insertions, 158 deletions
diff --git a/vendor/golang.org/x/net/ipv4/header.go b/vendor/golang.org/x/net/ipv4/header.go
deleted file mode 100644
index 358afe2..0000000
--- a/vendor/golang.org/x/net/ipv4/header.go
+++ /dev/null
@@ -1,158 +0,0 @@
-// 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 (
- "encoding/binary"
- "fmt"
- "net"
- "runtime"
-
- "golang.org/x/net/internal/socket"
-)
-
-const (
- Version = 4 // protocol version
- HeaderLen = 20 // header length without extension headers
- maxHeaderLen = 60 // sensible default, revisit if later RFCs define new usage of version and header length fields
-)
-
-type HeaderFlags int
-
-const (
- MoreFragments HeaderFlags = 1 << iota // more fragments flag
- DontFragment // don't fragment flag
-)
-
-// A Header represents an IPv4 header.
-type Header struct {
- Version int // protocol version
- Len int // header length
- TOS int // type-of-service
- TotalLen int // packet total length
- ID int // identification
- Flags HeaderFlags // flags
- FragOff int // fragment offset
- TTL int // time-to-live
- Protocol int // next protocol
- Checksum int // checksum
- Src net.IP // source address
- Dst net.IP // destination address
- Options []byte // options, extension headers
-}
-
-func (h *Header) String() string {
- if h == nil {
- return "<nil>"
- }
- return fmt.Sprintf("ver=%d hdrlen=%d tos=%#x totallen=%d id=%#x flags=%#x fragoff=%#x ttl=%d proto=%d cksum=%#x src=%v dst=%v", h.Version, h.Len, h.TOS, h.TotalLen, h.ID, h.Flags, h.FragOff, h.TTL, h.Protocol, h.Checksum, h.Src, h.Dst)
-}
-
-// Marshal returns the binary encoding of h.
-func (h *Header) Marshal() ([]byte, error) {
- if h == nil {
- return nil, errInvalidConn
- }
- if h.Len < HeaderLen {
- return nil, errHeaderTooShort
- }
- hdrlen := HeaderLen + len(h.Options)
- b := make([]byte, hdrlen)
- b[0] = byte(Version<<4 | (hdrlen >> 2 & 0x0f))
- b[1] = byte(h.TOS)
- flagsAndFragOff := (h.FragOff & 0x1fff) | int(h.Flags<<13)
- switch runtime.GOOS {
- case "darwin", "dragonfly", "netbsd":
- socket.NativeEndian.PutUint16(b[2:4], uint16(h.TotalLen))
- socket.NativeEndian.PutUint16(b[6:8], uint16(flagsAndFragOff))
- case "freebsd":
- if freebsdVersion < 1100000 {
- socket.NativeEndian.PutUint16(b[2:4], uint16(h.TotalLen))
- socket.NativeEndian.PutUint16(b[6:8], uint16(flagsAndFragOff))
- } else {
- binary.BigEndian.PutUint16(b[2:4], uint16(h.TotalLen))
- binary.BigEndian.PutUint16(b[6:8], uint16(flagsAndFragOff))
- }
- default:
- binary.BigEndian.PutUint16(b[2:4], uint16(h.TotalLen))
- binary.BigEndian.PutUint16(b[6:8], uint16(flagsAndFragOff))
- }
- binary.BigEndian.PutUint16(b[4:6], uint16(h.ID))
- b[8] = byte(h.TTL)
- b[9] = byte(h.Protocol)
- binary.BigEndian.PutUint16(b[10:12], uint16(h.Checksum))
- if ip := h.Src.To4(); ip != nil {
- copy(b[12:16], ip[:net.IPv4len])
- }
- if ip := h.Dst.To4(); ip != nil {
- copy(b[16:20], ip[:net.IPv4len])
- } else {
- return nil, errMissingAddress
- }
- if len(h.Options) > 0 {
- copy(b[HeaderLen:], h.Options)
- }
- return b, nil
-}
-
-// Parse parses b as an IPv4 header and stores the result in h.
-func (h *Header) Parse(b []byte) error {
- if h == nil || len(b) < HeaderLen {
- return errHeaderTooShort
- }
- hdrlen := int(b[0]&0x0f) << 2
- if hdrlen > len(b) {
- return errBufferTooShort
- }
- h.Version = int(b[0] >> 4)
- h.Len = hdrlen
- h.TOS = int(b[1])
- h.ID = int(binary.BigEndian.Uint16(b[4:6]))
- h.TTL = int(b[8])
- h.Protocol = int(b[9])
- h.Checksum = int(binary.BigEndian.Uint16(b[10:12]))
- h.Src = net.IPv4(b[12], b[13], b[14], b[15])
- h.Dst = net.IPv4(b[16], b[17], b[18], b[19])
- switch runtime.GOOS {
- case "darwin", "dragonfly", "netbsd":
- h.TotalLen = int(socket.NativeEndian.Uint16(b[2:4])) + hdrlen
- h.FragOff = int(socket.NativeEndian.Uint16(b[6:8]))
- case "freebsd":
- if freebsdVersion < 1100000 {
- h.TotalLen = int(socket.NativeEndian.Uint16(b[2:4]))
- if freebsdVersion < 1000000 {
- h.TotalLen += hdrlen
- }
- h.FragOff = int(socket.NativeEndian.Uint16(b[6:8]))
- } else {
- h.TotalLen = int(binary.BigEndian.Uint16(b[2:4]))
- h.FragOff = int(binary.BigEndian.Uint16(b[6:8]))
- }
- default:
- h.TotalLen = int(binary.BigEndian.Uint16(b[2:4]))
- h.FragOff = int(binary.BigEndian.Uint16(b[6:8]))
- }
- h.Flags = HeaderFlags(h.FragOff&0xe000) >> 13
- h.FragOff = h.FragOff & 0x1fff
- optlen := hdrlen - HeaderLen
- if optlen > 0 && len(b) >= hdrlen {
- if cap(h.Options) < optlen {
- h.Options = make([]byte, optlen)
- } else {
- h.Options = h.Options[:optlen]
- }
- copy(h.Options, b[HeaderLen:hdrlen])
- }
- return nil
-}
-
-// ParseHeader parses b as an IPv4 header.
-func ParseHeader(b []byte) (*Header, error) {
- h := new(Header)
- if err := h.Parse(b); err != nil {
- return nil, err
- }
- return h, nil
-}