1 files changed, 0 insertions, 192 deletions
diff --git a/vendor/github.com/google/gopacket/examples/bidirectional/main.go b/vendor/github.com/google/gopacket/examples/bidirectional/main.go
deleted file mode 100644
index 4b0b240..0000000
--- a/vendor/github.com/google/gopacket/examples/bidirectional/main.go
+++ /dev/null
@@ -1,192 +0,0 @@
-// Copyright 2012 Google, Inc. 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.
-
-// This binary provides an example of connecting up bidirectional streams from
-// the unidirectional streams provided by gopacket/tcpassembly.
-package main
-
-import (
-	"flag"
-	"fmt"
-	"github.com/google/gopacket"
-	"github.com/google/gopacket/examples/util"
-	"github.com/google/gopacket/layers"
-	"github.com/google/gopacket/pcap"
-	"github.com/google/gopacket/tcpassembly"
-	"log"
-	"time"
-)
-
-var iface = flag.String("i", "eth0", "Interface to get packets from")
-var snaplen = flag.Int("s", 16<<10, "SnapLen for pcap packet capture")
-var filter = flag.String("f", "tcp", "BPF filter for pcap")
-var logAllPackets = flag.Bool("v", false, "Logs every packet in great detail")
-
-// key is used to map bidirectional streams to each other.
-type key struct {
-	net, transport gopacket.Flow
-}
-
-// String prints out the key in a human-readable fashion.
-func (k key) String() string {
-	return fmt.Sprintf("%v:%v", k.net, k.transport)
-}
-
-// timeout is the length of time to wait befor flushing connections and
-// bidirectional stream pairs.
-const timeout time.Duration = time.Minute * 5
-
-// myStream implements tcpassembly.Stream
-type myStream struct {
-	bytes int64 // total bytes seen on this stream.
-	bidi  *bidi // maps to my bidirectional twin.
-	done  bool  // if true, we've seen the last packet we're going to for this stream.
-}
-
-// bidi stores each unidirectional side of a bidirectional stream.
-//
-// When a new stream comes in, if we don't have an opposite stream, a bidi is
-// created with 'a' set to the new stream.  If we DO have an opposite stream,
-// 'b' is set to the new stream.
-type bidi struct {
-	key            key       // Key of the first stream, mostly for logging.
-	a, b           *myStream // the two bidirectional streams.
-	lastPacketSeen time.Time // last time we saw a packet from either stream.
-}
-
-// myFactory implements tcpassmebly.StreamFactory
-type myFactory struct {
-	// bidiMap maps keys to bidirectional stream pairs.
-	bidiMap map[key]*bidi
-}
-
-// New handles creating a new tcpassembly.Stream.
-func (f *myFactory) New(netFlow, tcpFlow gopacket.Flow) tcpassembly.Stream {
-	// Create a new stream.
-	s := &myStream{}
-
-	// Find the bidi bidirectional struct for this stream, creating a new one if
-	// one doesn't already exist in the map.
-	k := key{netFlow, tcpFlow}
-	bd := f.bidiMap[k]
-	if bd == nil {
-		bd = &bidi{a: s, key: k}
-		log.Printf("[%v] created first side of bidirectional stream", bd.key)
-		// Register bidirectional with the reverse key, so the matching stream going
-		// the other direction will find it.
-		f.bidiMap[key{netFlow.Reverse(), tcpFlow.Reverse()}] = bd
-	} else {
-		log.Printf("[%v] found second side of bidirectional stream", bd.key)
-		bd.b = s
-		// Clear out the bidi we're using from the map, just in case.
-		delete(f.bidiMap, k)
-	}
-	s.bidi = bd
-	return s
-}
-
-// emptyStream is used to finish bidi that only have one stream, in
-// collectOldStreams.
-var emptyStream = &myStream{done: true}
-
-// collectOldStreams finds any streams that haven't received a packet within
-// 'timeout', and sets/finishes the 'b' stream inside them.  The 'a' stream may
-// still receive packets after this.
-func (f *myFactory) collectOldStreams() {
-	cutoff := time.Now().Add(-timeout)
-	for k, bd := range f.bidiMap {
-		if bd.lastPacketSeen.Before(cutoff) {
-			log.Printf("[%v] timing out old stream", bd.key)
-			bd.b = emptyStream   // stub out b with an empty stream.
-			delete(f.bidiMap, k) // remove it from our map.
-			bd.maybeFinish()     // if b was the last stream we were waiting for, finish up.
-		}
-	}
-}
-
-// Reassembled handles reassembled TCP stream data.
-func (s *myStream) Reassembled(rs []tcpassembly.Reassembly) {
-	for _, r := range rs {
-		// For now, we'll simply count the bytes on each side of the TCP stream.
-		s.bytes += int64(len(r.Bytes))
-		if r.Skip > 0 {
-			s.bytes += int64(r.Skip)
-		}
-		// Mark that we've received new packet data.
-		// We could just use time.Now, but by using r.Seen we handle the case
-		// where packets are being read from a file and could be very old.
-		if s.bidi.lastPacketSeen.After(r.Seen) {
-			s.bidi.lastPacketSeen = r.Seen
-		}
-	}
-}
-
-// ReassemblyComplete marks this stream as finished.
-func (s *myStream) ReassemblyComplete() {
-	s.done = true
-	s.bidi.maybeFinish()
-}
-
-// maybeFinish will wait until both directions are complete, then print out
-// stats.
-func (bd *bidi) maybeFinish() {
-	switch {
-	case bd.a == nil:
-		log.Fatalf("[%v] a should always be non-nil, since it's set when bidis are created", bd.key)
-	case !bd.a.done:
-		log.Printf("[%v] still waiting on first stream", bd.key)
-	case bd.b == nil:
-		log.Printf("[%v] no second stream yet", bd.key)
-	case !bd.b.done:
-		log.Printf("[%v] still waiting on second stream", bd.key)
-	default:
-		log.Printf("[%v] FINISHED, bytes: %d tx, %d rx", bd.key, bd.a.bytes, bd.b.bytes)
-	}
-}
-
-func main() {
-	defer util.Run()()
-	log.Printf("starting capture on interface %q", *iface)
-	// Set up pcap packet capture
-	handle, err := pcap.OpenLive(*iface, int32(*snaplen), true, pcap.BlockForever)
-	if err != nil {
-		panic(err)
-	}
-	if err := handle.SetBPFFilter(*filter); err != nil {
-		panic(err)
-	}
-
-	// Set up assembly
-	streamFactory := &myFactory{bidiMap: make(map[key]*bidi)}
-	streamPool := tcpassembly.NewStreamPool(streamFactory)
-	assembler := tcpassembly.NewAssembler(streamPool)
-
-	log.Println("reading in packets")
-	// Read in packets, pass to assembler.
-	packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
-	packets := packetSource.Packets()
-	ticker := time.Tick(timeout / 4)
-	for {
-		select {
-		case packet := <-packets:
-			if *logAllPackets {
-				log.Println(packet)
-			}
-			if packet.NetworkLayer() == nil || packet.TransportLayer() == nil || packet.TransportLayer().LayerType() != layers.LayerTypeTCP {
-				log.Println("Unusable packet")
-				continue
-			}
-			tcp := packet.TransportLayer().(*layers.TCP)
-			assembler.AssembleWithTimestamp(packet.NetworkLayer().NetworkFlow(), tcp, packet.Metadata().Timestamp)
-
-		case <-ticker:
-			// Every minute, flush connections that haven't seen activity in the past minute.
-			log.Println("---- FLUSHING ----")
-			assembler.FlushOlderThan(time.Now().Add(-timeout))
-			streamFactory.collectOldStreams()
-		}
-	}
-}