diff --git a/vendor/github.com/google/gopacket/pcap/generate_defs.go b/vendor/github.com/google/gopacket/pcap/generate_defs.go
new file mode 100644
index 0000000..bcbf161
--- /dev/null
+++ b/vendor/github.com/google/gopacket/pcap/generate_defs.go
@@ -0,0 +1,157 @@
+// Copyright 2019 The GoPacket Authors. 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.
+
+// +build ignore
+
+package main
+
+// This file generates the godefs needed for the windows version.
+// Rebuild is only necessary if additional libpcap functionality is implemented, or a new arch is implemented in golang.
+// Call with go run generate_windows.go [-I includepath]
+// Needs npcap sdk, go tool cgo, and gofmt to work. Location of npcap includes can be specified with -I
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+)
+
+const header = `// Copyright 2019 The GoPacket Authors. 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 file contains necessary structs/constants generated from libpcap headers with cgo -godefs
+// generated with: %s
+// DO NOT MODIFY
+
+`
+
+const source = `
+package pcap
+
+//#include <pcap.h>
+import "C"
+
+import "syscall" // needed for RawSockaddr
+
+const errorBufferSize = C.PCAP_ERRBUF_SIZE
+
+const (
+	pcapErrorNotActivated    = C.PCAP_ERROR_NOT_ACTIVATED
+	pcapErrorActivated       = C.PCAP_ERROR_ACTIVATED
+	pcapWarningPromisc       = C.PCAP_WARNING_PROMISC_NOTSUP
+	pcapErrorNoSuchDevice    = C.PCAP_ERROR_NO_SUCH_DEVICE
+	pcapErrorDenied          = C.PCAP_ERROR_PERM_DENIED
+	pcapErrorNotUp           = C.PCAP_ERROR_IFACE_NOT_UP
+	pcapError                = C.PCAP_ERROR
+	pcapWarning              = C.PCAP_WARNING
+	pcapDIN                  = C.PCAP_D_IN
+	pcapDOUT                 = C.PCAP_D_OUT
+	pcapDINOUT               = C.PCAP_D_INOUT
+	pcapNetmaskUnknown       = C.PCAP_NETMASK_UNKNOWN
+	pcapTstampPrecisionMicro = C.PCAP_TSTAMP_PRECISION_MICRO
+	pcapTstampPrecisionNano  = C.PCAP_TSTAMP_PRECISION_NANO
+)
+
+type timeval C.struct_timeval
+type pcapPkthdr C.struct_pcap_pkthdr
+type pcapTPtr uintptr
+type pcapBpfInstruction C.struct_bpf_insn
+type pcapBpfProgram C.struct_bpf_program
+type pcapStats C.struct_pcap_stat
+type pcapCint C.int
+type pcapIf C.struct_pcap_if
+// +godefs map struct_sockaddr syscall.RawSockaddr
+type pcapAddr C.struct_pcap_addr
+`
+
+var includes = flag.String("I", "C:\\npcap-sdk-1.01\\Include", "Include path containing libpcap headers")
+
+func main() {
+	flag.Parse()
+
+	infile, err := ioutil.TempFile(".", "defs.*.go")
+	if err != nil {
+		log.Fatal("Couldn't create temporary source file: ", err)
+	}
+	defer infile.Close()
+	defer os.Remove(infile.Name())
+
+	_, err = infile.WriteString(source)
+	if err != nil {
+		log.Fatalf("Couldn't write definitions to temporary file %s: %s", infile.Name(), err)
+	}
+	err = infile.Close()
+	if err != nil {
+		log.Fatalf("Couldn't close temporary source file %s: %s", infile.Name(), err)
+	}
+
+	archs := []string{"386", "amd64"}
+	for _, arch := range archs {
+		env := append(os.Environ(), "GOARCH="+arch)
+		cmd := exec.Command("go", "tool", "cgo", "-godefs", "--", "-I", *includes, infile.Name())
+		cmd.Env = env
+		cmd.Stderr = os.Stderr
+		var generated bytes.Buffer
+		cmd.Stdout = &generated
+		err := cmd.Run()
+		if err != nil {
+			log.Fatalf("Couldn't generated defs for %s: %s\n", arch, err)
+		}
+
+		cmd = exec.Command("gofmt")
+		cmd.Env = env
+		cmd.Stderr = os.Stderr
+		outName := fmt.Sprintf("defs_windows_%s.go", arch)
+		out, err := os.Create(outName)
+		if err != nil {
+			log.Fatalf("Couldn't open file %s: %s", outName, err)
+		}
+		cmd.Stdout = out
+		in, err := cmd.StdinPipe()
+		if err != nil {
+			log.Fatal("Couldn't create input pipe for gofmt: ", err)
+		}
+		err = cmd.Start()
+		if err != nil {
+			log.Fatal("Couldn't start gofmt: ", err)
+		}
+
+		_, err = fmt.Fprintf(in, header, strings.Join(append([]string{filepath.Base(os.Args[0])}, os.Args[1:]...), " "))
+		if err != nil {
+			log.Fatal("Couldn't write header to gofmt: ", err)
+		}
+
+		for {
+			line, err := generated.ReadBytes('\n')
+			if err != nil {
+				break
+			}
+			// remove godefs comments
+			if bytes.HasPrefix(line, []byte("//")) {
+				continue
+			}
+			_, err = in.Write(line)
+			if err != nil {
+				log.Fatal("Couldn't write line to gofmt: ", err)
+			}
+		}
+		in.Close()
+		err = cmd.Wait()
+		if err != nil {
+			log.Fatal("gofmt failed: ", err)
+		}
+		out.Close()
+	}
+}
diff --git a/vendor/github.com/google/gopacket/pcap/pcap_tester.go b/vendor/github.com/google/gopacket/pcap/pcap_tester.go
new file mode 100644
index 0000000..7873a96
--- /dev/null
+++ b/vendor/github.com/google/gopacket/pcap/pcap_tester.go
@@ -0,0 +1,108 @@
+// 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.
+
+// +build ignore
+
+// This binary tests that PCAP packet capture is working correctly by issuing
+// HTTP requests, then making sure we actually capture data off the wire.
+package main
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/google/gopacket/pcap"
+)
+
+var mode = flag.String("mode", "basic", "One of: basic,filtered,timestamp")
+
+func generatePackets() {
+	if resp, err := http.Get("http://code.google.com"); err != nil {
+		log.Printf("Could not get HTTP: %v", err)
+	} else {
+		resp.Body.Close()
+	}
+}
+
+func main() {
+	flag.Parse()
+	ifaces, err := pcap.FindAllDevs()
+	if err != nil {
+		log.Fatal(err)
+	}
+	for _, iface := range ifaces {
+		log.Printf("Trying capture on %q", iface.Name)
+		if err := tryCapture(iface); err != nil {
+			log.Printf("Error capturing on %q: %v", iface.Name, err)
+		} else {
+			log.Printf("Successfully captured on %q", iface.Name)
+			return
+		}
+	}
+	os.Exit(1)
+}
+
+func tryCapture(iface pcap.Interface) error {
+	if iface.Name[:2] == "lo" {
+		return errors.New("skipping loopback")
+	}
+	var h *pcap.Handle
+	var err error
+	switch *mode {
+	case "basic":
+		h, err = pcap.OpenLive(iface.Name, 65536, false, time.Second*3)
+		if err != nil {
+			return fmt.Errorf("openlive: %v", err)
+		}
+		defer h.Close()
+	case "filtered":
+		h, err = pcap.OpenLive(iface.Name, 65536, false, time.Second*3)
+		if err != nil {
+			return fmt.Errorf("openlive: %v", err)
+		}
+		defer h.Close()
+		if err := h.SetBPFFilter("port 80 or port 443"); err != nil {
+			return fmt.Errorf("setbpf: %v", err)
+		}
+	case "timestamp":
+		u, err := pcap.NewInactiveHandle(iface.Name)
+		if err != nil {
+			return err
+		}
+		defer u.CleanUp()
+		if err = u.SetSnapLen(65536); err != nil {
+			return err
+		} else if err = u.SetPromisc(false); err != nil {
+			return err
+		} else if err = u.SetTimeout(time.Second * 3); err != nil {
+			return err
+		}
+		sources := u.SupportedTimestamps()
+		if len(sources) == 0 {
+			return errors.New("no supported timestamp sources")
+		} else if err := u.SetTimestampSource(sources[0]); err != nil {
+			return fmt.Errorf("settimestampsource(%v): %v", sources[0], err)
+		} else if h, err = u.Activate(); err != nil {
+			return fmt.Errorf("could not activate: %v", err)
+		}
+		defer h.Close()
+	default:
+		panic("Invalid --mode: " + *mode)
+	}
+	go generatePackets()
+	h.ReadPacketData() // Do one dummy read to clear any timeouts.
+	data, ci, err := h.ReadPacketData()
+	if err != nil {
+		return fmt.Errorf("readpacketdata: %v", err)
+	}
+	log.Printf("Read packet, %v bytes, CI: %+v", len(data), ci)
+	return nil
+}