diff options
Diffstat (limited to 'src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/github.com/google/gopacket/layers/udp.go')
-rw-r--r-- | src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/github.com/google/gopacket/layers/udp.go | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/github.com/google/gopacket/layers/udp.go b/src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/github.com/google/gopacket/layers/udp.go deleted file mode 100644 index 97e81c69fcc..00000000000 --- a/src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/github.com/google/gopacket/layers/udp.go +++ /dev/null @@ -1,133 +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 { - if len(data) < 8 { - df.SetTruncated() - return fmt.Errorf("Invalid UDP header. Length %d less than 8", len(data)) - } - 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) -} - -// For testing only -func (u *UDP) SetInternalPortsForTesting() { - u.sPort = make([]byte, 2) - u.dPort = make([]byte, 2) - binary.BigEndian.PutUint16(u.sPort, uint16(u.SrcPort)) - binary.BigEndian.PutUint16(u.dPort, uint16(u.DstPort)) -} |