diff options
author | Ondrej Fabry <ofabry@cisco.com> | 2019-08-02 15:07:53 +0200 |
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committer | Ondrej Fabry <ofabry@cisco.com> | 2019-08-02 15:07:53 +0200 |
commit | ca6003af1a7e1adb7d45879c2d5038bc05c2bb1a (patch) | |
tree | 97a3620b0fc5c7a0ee032fe7d12d37b6303cfb01 /vendor/github.com/google/gopacket/layers/udp.go | |
parent | 639870b5083a1e66f4584ec7a5f30492fcdb7168 (diff) |
Migrate to modules, refactor Makefile and use Travis for CI
- migrate to Go modules and remove vendor
- refactor Makefile
- add version package and store version
- split extras from the rest
- use travis for CI
Change-Id: I81b35220653b0f7c9a0fcdd4c527d691ec1e96c1
Signed-off-by: Ondrej Fabry <ofabry@cisco.com>
Diffstat (limited to 'vendor/github.com/google/gopacket/layers/udp.go')
-rw-r--r-- | vendor/github.com/google/gopacket/layers/udp.go | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/vendor/github.com/google/gopacket/layers/udp.go b/vendor/github.com/google/gopacket/layers/udp.go deleted file mode 100644 index 20f8c50..0000000 --- a/vendor/github.com/google/gopacket/layers/udp.go +++ /dev/null @@ -1,120 +0,0 @@ -// Copyright 2012 Google, Inc. All rights reserved. -// Copyright 2009-2011 Andreas Krennmair. All rights reserved. -// -// Use of this source code is governed by a BSD-style license -// that can be found in the LICENSE file in the root of the source -// tree. - -package layers - -import ( - "encoding/binary" - "fmt" - "github.com/google/gopacket" -) - -// UDP is the layer for UDP headers. -type UDP struct { - BaseLayer - SrcPort, DstPort UDPPort - Length uint16 - Checksum uint16 - sPort, dPort []byte - tcpipchecksum -} - -// LayerType returns gopacket.LayerTypeUDP -func (u *UDP) LayerType() gopacket.LayerType { return LayerTypeUDP } - -func (udp *UDP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { - udp.SrcPort = UDPPort(binary.BigEndian.Uint16(data[0:2])) - udp.sPort = data[0:2] - udp.DstPort = UDPPort(binary.BigEndian.Uint16(data[2:4])) - udp.dPort = data[2:4] - udp.Length = binary.BigEndian.Uint16(data[4:6]) - udp.Checksum = binary.BigEndian.Uint16(data[6:8]) - udp.BaseLayer = BaseLayer{Contents: data[:8]} - switch { - case udp.Length >= 8: - hlen := int(udp.Length) - if hlen > len(data) { - df.SetTruncated() - hlen = len(data) - } - udp.Payload = data[8:hlen] - case udp.Length == 0: // Jumbogram, use entire rest of data - udp.Payload = data[8:] - default: - return fmt.Errorf("UDP packet too small: %d bytes", udp.Length) - } - return nil -} - -// SerializeTo writes the serialized form of this layer into the -// SerializationBuffer, implementing gopacket.SerializableLayer. -// See the docs for gopacket.SerializableLayer for more info. -func (u *UDP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { - var jumbo bool - - payload := b.Bytes() - if _, ok := u.pseudoheader.(*IPv6); ok { - if len(payload)+8 > 65535 { - jumbo = true - } - } - bytes, err := b.PrependBytes(8) - if err != nil { - return err - } - binary.BigEndian.PutUint16(bytes, uint16(u.SrcPort)) - binary.BigEndian.PutUint16(bytes[2:], uint16(u.DstPort)) - if opts.FixLengths { - if jumbo { - u.Length = 0 - } else { - u.Length = uint16(len(payload)) + 8 - } - } - binary.BigEndian.PutUint16(bytes[4:], u.Length) - if opts.ComputeChecksums { - // zero out checksum bytes - bytes[6] = 0 - bytes[7] = 0 - csum, err := u.computeChecksum(b.Bytes(), IPProtocolUDP) - if err != nil { - return err - } - u.Checksum = csum - } - binary.BigEndian.PutUint16(bytes[6:], u.Checksum) - return nil -} - -func (u *UDP) CanDecode() gopacket.LayerClass { - return LayerTypeUDP -} - -// NextLayerType use the destination port to select the -// right next decoder. It tries first to decode via the -// destination port, then the source port. -func (u *UDP) NextLayerType() gopacket.LayerType { - if lt := u.DstPort.LayerType(); lt != gopacket.LayerTypePayload { - return lt - } - return u.SrcPort.LayerType() -} - -func decodeUDP(data []byte, p gopacket.PacketBuilder) error { - udp := &UDP{} - err := udp.DecodeFromBytes(data, p) - p.AddLayer(udp) - p.SetTransportLayer(udp) - if err != nil { - return err - } - return p.NextDecoder(udp.NextLayerType()) -} - -func (u *UDP) TransportFlow() gopacket.Flow { - return gopacket.NewFlow(EndpointUDPPort, u.sPort, u.dPort) -} |