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# vmnet-proxy
A TCP/UDP proxy for macOS utilizing `vmnet.framework`
## Requirements
- macOS 10.10 or later.
## Example usage
```
$ go build .
$ sudo ./vmnet-proxy tcp:2222:192.168.1.5:22
$ sudo ./vmnet-proxy -iface en1 tcp:5901:192.168.1.5:5900
$ sudo ./vmnet-proxy tcp:443:1.1.1.1:443 tcp:80:1.1.1.1:80
```
## TODO
- IPv6 support
- DHCP support for IPv4
## Credits
Credits to https://github.com/alessiodionisi/qemu-vmnet for the native code in `pkg/vmnet/`.

41
dialer.go Normal file
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package main
import (
"fmt"
"net"
"net/netip"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/adapters/gonet"
"gvisor.dev/gvisor/pkg/tcpip/header"
)
func (s *Server) Dial(network, address string) (net.Conn, error) {
addrPort, err := netip.ParseAddrPort(address)
if err != nil {
return nil, err
}
remote := tcpip.FullAddress{
Addr: tcpip.AddrFromSlice(addrPort.Addr().AsSlice()),
Port: addrPort.Port(),
}
var networkProtocol tcpip.NetworkProtocolNumber
if addrPort.Addr().Is4() {
networkProtocol = header.IPv4ProtocolNumber
} else {
networkProtocol = header.IPv6ProtocolNumber
}
if network == "tcp" {
return gonet.DialTCP(s.stack, remote, networkProtocol)
}
if network == "udp" {
return gonet.DialUDP(s.stack, nil, &remote, networkProtocol)
}
return nil, fmt.Errorf("unsupported network: %s", network)
}

18
go.mod Normal file
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module vmnet-proxy
go 1.23.1
toolchain go1.23.2
require (
github.com/rs/zerolog v1.29.1
gvisor.dev/gvisor v0.0.0-20241108012608-5901531b85ba
)
require (
github.com/google/btree v1.1.2 // indirect
github.com/mattn/go-colorable v0.1.13 // indirect
github.com/mattn/go-isatty v0.0.17 // indirect
golang.org/x/sys v0.26.0 // indirect
golang.org/x/time v0.7.0 // indirect
)

30
go.sum Normal file
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@ -0,0 +1,30 @@
github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
github.com/google/btree v1.1.2 h1:xf4v41cLI2Z6FxbKm+8Bu+m8ifhj15JuZ9sa0jZCMUU=
github.com/google/btree v1.1.2/go.mod h1:qOPhT0dTNdNzV6Z/lhRX0YXUafgPLFUh+gZMl761Gm4=
github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
github.com/mattn/go-isatty v0.0.17 h1:BTarxUcIeDqL27Mc+vyvdWYSL28zpIhv3RoTdsLMPng=
github.com/mattn/go-isatty v0.0.17/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/rs/xid v1.4.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
github.com/rs/zerolog v1.29.1 h1:cO+d60CHkknCbvzEWxP0S9K6KqyTjrCNUy1LdQLCGPc=
github.com/rs/zerolog v1.29.1/go.mod h1:Le6ESbR7hc+DP6Lt1THiV8CQSdkkNrd3R0XbEgp3ZBU=
golang.org/x/mod v0.21.0 h1:vvrHzRwRfVKSiLrG+d4FMl/Qi4ukBCE6kZlTUkDYRT0=
golang.org/x/mod v0.21.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/time v0.7.0 h1:ntUhktv3OPE6TgYxXWv9vKvUSJyIFJlyohwbkEwPrKQ=
golang.org/x/time v0.7.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
gvisor.dev/gvisor v0.0.0-20241108012608-5901531b85ba h1:ZXzGZ6Md+Vspe9x45C6QlpCdpwYC6nHFtWIfZzTqB0k=
gvisor.dev/gvisor v0.0.0-20241108012608-5901531b85ba/go.mod h1:5DMfjtclAbTIjbXqO1qCe2K5GKKxWz2JHvCChuTcJEM=
gvisor.dev/gvisor v0.0.0-20241108230622-f37f2c37c8de h1:3j8b4UaGajW7XdBH6qmSHIfEPOgJGZgRmTcs05nAK10=
gvisor.dev/gvisor v0.0.0-20241108230622-f37f2c37c8de/go.mod h1:5DMfjtclAbTIjbXqO1qCe2K5GKKxWz2JHvCChuTcJEM=

77
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package main
import (
"flag"
"fmt"
"os"
"os/signal"
"strconv"
"strings"
"syscall"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
func main() {
log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr})
iface := flag.String("iface", "en0", "host interface to use")
debug := flag.Bool("debug", false, "sets log level to debug")
trace := flag.Bool("trace", false, "sets log level to trace")
help := flag.Bool("help", false, "shows help")
// chosen by fair dice roll
hostLinkAddr := flag.String("mac", "00:1A:70:54:A6:93", "MAC address to use")
hostProtoAddr := flag.String("ip", "192.168.255.10/24", "IP address to use (with prefix)")
gateProtoAddr := flag.String("gateway", "192.168.255.1", "gateway IP address")
flag.Parse()
if *help {
usage(0)
}
zerolog.SetGlobalLevel(zerolog.InfoLevel)
if *debug {
zerolog.SetGlobalLevel(zerolog.DebugLevel)
}
if *trace {
zerolog.SetGlobalLevel(zerolog.TraceLevel)
}
server, err := NewServer(*iface, *hostLinkAddr, *hostProtoAddr, *gateProtoAddr)
if err != nil {
log.Fatal().Msgf("unable to start the server: %s", err)
}
defer server.Close()
go server.Loop()
for _, arg := range flag.Args() {
parts := strings.Split(arg, ":")
if len(parts) != 4 {
usage(1)
}
network := parts[0]
localPort, err := strconv.Atoi(parts[1])
if err != nil {
panic(err)
}
remoteAddr := parts[2] + ":" + parts[3]
go server.Proxy(network, localPort, remoteAddr)
}
sig := make(chan os.Signal, 1)
signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
<-sig
log.Info().Msg("closing down")
server.Shutdown()
}
func usage(exitcode int) {
fmt.Println("usage: ./uwu protocol:local-port:remote-host:remote-port")
os.Exit(exitcode)
}

7
pkg/vmnet/error.go Normal file
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package vmnet
import "errors"
var (
ErrUnableToStart = errors.New("vmnet: unable to start")
)

59
pkg/vmnet/vmnet.go Normal file
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package vmnet
// #cgo CFLAGS: -x objective-c
// #cgo LDFLAGS: -lobjc -framework vmnet
// #include "vmnet.h"
import "C"
import (
"io"
"unsafe"
)
type VMNet struct {
io.ReadWriter
iface C.interface_ref
mps C.ulonglong
MaxPacketSize int
}
func (v *VMNet) Start(hostIface string) error {
C._vmnet_start(&v.iface, C.CString(hostIface), &v.mps)
if v.iface == nil {
return ErrUnableToStart
}
v.MaxPacketSize = int(v.mps)
return nil
}
func (v *VMNet) Stop() error {
C._vmnet_stop(v.iface)
return nil
}
func (v *VMNet) Read(p []byte) (n int, err error) {
for {
var cBytes unsafe.Pointer
var cBytesLen C.ulong
C._vmnet_read(v.iface, v.mps, &cBytes, &cBytesLen)
if cBytes == nil {
continue
}
copy(p, C.GoBytes(cBytes, C.int(cBytesLen)))
return int(cBytesLen), nil
}
}
func (v *VMNet) Write(p []byte) (n int, err error) {
C._vmnet_write(v.iface, C.CBytes(p), C.ulong(len(p)))
return len(p), nil
}
func New() *VMNet {
return &VMNet{}
}

13
pkg/vmnet/vmnet.h Normal file
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#ifndef vmnet_h
#define vmnet_h
#include <sys/uio.h>
#include <vmnet/vmnet.h>
void _vmnet_start(interface_ref *interface, char *host_interface, uint64_t *max_packet_size);
void _vmnet_stop(interface_ref interface);
void _vmnet_write(interface_ref interface, void *bytes, size_t bytes_size);
void _vmnet_read(interface_ref interface, uint64_t max_packet_size,
void **bytes, size_t *bytes_size);
#endif /* vmnet_h */

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pkg/vmnet/vmnet.m Normal file
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#import "vmnet.h"
void _vmnet_start(interface_ref *interface, char *host_interface, uint64_t *max_packet_size) {
xpc_object_t interface_desc = xpc_dictionary_create(NULL, NULL, 0);
xpc_dictionary_set_uint64(interface_desc, vmnet_operation_mode_key,
VMNET_BRIDGED_MODE);
xpc_dictionary_set_string(interface_desc, vmnet_shared_interface_name_key, host_interface);
dispatch_queue_t interface_start_queue =
dispatch_queue_create("vmnet-start", DISPATCH_QUEUE_SERIAL);
dispatch_semaphore_t interface_start_semaphore = dispatch_semaphore_create(0);
__block interface_ref _interface;
__block vmnet_return_t interface_status;
__block uint64_t _max_packet_size = 0;
_interface = vmnet_start_interface(
interface_desc, interface_start_queue,
^(vmnet_return_t status, xpc_object_t interface_param) {
interface_status = status;
if (status == VMNET_SUCCESS) {
_max_packet_size = xpc_dictionary_get_uint64(
interface_param, vmnet_max_packet_size_key);
}
dispatch_semaphore_signal(interface_start_semaphore);
});
dispatch_semaphore_wait(interface_start_semaphore, DISPATCH_TIME_FOREVER);
dispatch_release(interface_start_queue);
xpc_release(interface_desc);
if (interface_status != VMNET_SUCCESS) {
return;
}
*interface = _interface;
*max_packet_size = _max_packet_size;
}
void _vmnet_stop(interface_ref interface) {
if (interface == NULL) {
return;
}
dispatch_queue_t interface_stop_queue =
dispatch_queue_create("vmnet-stop", DISPATCH_QUEUE_SERIAL);
dispatch_semaphore_t interface_stop_semaphore = dispatch_semaphore_create(0);
vmnet_stop_interface(interface, interface_stop_queue,
^(vmnet_return_t status) {
dispatch_semaphore_signal(interface_stop_semaphore);
});
dispatch_semaphore_wait(interface_stop_semaphore, DISPATCH_TIME_FOREVER);
dispatch_release(interface_stop_queue);
}
void _vmnet_write(interface_ref interface, void *bytes, size_t bytes_size) {
if (interface == NULL) {
return;
}
struct iovec packets_iovec = {
.iov_base = bytes,
.iov_len = bytes_size,
};
struct vmpktdesc packets = {
.vm_pkt_size = bytes_size,
.vm_pkt_iov = &packets_iovec,
.vm_pkt_iovcnt = 1,
.vm_flags = 0,
};
int packets_count = packets.vm_pkt_iovcnt;
vmnet_write(interface, &packets, &packets_count);
}
void _vmnet_read(interface_ref interface, uint64_t max_packet_size,
void **bytes, size_t *bytes_size) {
struct iovec packets_iovec = {
.iov_base = malloc(max_packet_size),
.iov_len = max_packet_size,
};
struct vmpktdesc packets = {
.vm_pkt_size = max_packet_size,
.vm_pkt_iov = &packets_iovec,
.vm_pkt_iovcnt = 1,
.vm_flags = 0,
};
int packets_count = 1;
vmnet_return_t status = vmnet_read(interface, &packets, &packets_count);
if (status != VMNET_SUCCESS || packets_count == 0) {
return;
}
*bytes = packets.vm_pkt_iov->iov_base;
*bytes_size = packets.vm_pkt_size;
}

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proxy.go Normal file
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package main
import (
"fmt"
"io"
"net"
"strings"
"github.com/rs/zerolog/log"
)
func (s *Server) Proxy(network string, localPort int, remoteAddr string) {
l, err := net.Listen(network, fmt.Sprintf("127.0.0.1:%d", localPort))
if err != nil {
panic(err)
}
for {
conn, err := l.Accept()
if err != nil {
panic(err)
}
go func(conn net.Conn) {
otherConn, err := s.Dial(network, remoteAddr)
if err != nil {
log.Warn().Msgf("cannot connect to %s: %s", remoteAddr, err)
return
}
log.Info().Msgf("proxied 127.0.0.1:%d to %s", localPort, remoteAddr)
go Copy(conn, otherConn)
go Copy(otherConn, conn)
}(conn)
}
}
func Copy(dst io.ReadWriteCloser, src io.ReadWriteCloser) {
_, err := io.Copy(dst, src)
// this is scuffed but meh
if err == nil || err == io.EOF || strings.HasSuffix(err.Error(), "use of closed network connection") {
dst.Close()
} else {
panic(err)
}
}

294
server.go Normal file
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package main
import (
"fmt"
"net"
"vmnet-proxy/pkg/vmnet"
"github.com/rs/zerolog/log"
"gvisor.dev/gvisor/pkg/buffer"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/header"
"gvisor.dev/gvisor/pkg/tcpip/network/arp"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
"gvisor.dev/gvisor/pkg/tcpip/stack"
"gvisor.dev/gvisor/pkg/tcpip/transport/tcp"
"gvisor.dev/gvisor/pkg/tcpip/transport/udp"
)
type Server struct {
*vmnet.VMNet
linkHost tcpip.LinkAddress
linkGateway tcpip.LinkAddress
protoHost tcpip.AddressWithPrefix
protoGateway tcpip.Address
dispatcher stack.NetworkDispatcher
stack *stack.Stack
}
func NewServer(hostIface string, linkHostStr string, protoHostStr string, protoGatewayStr string) (*Server, error) {
// convert addresses
linkHost, err := tcpip.ParseMACAddress(linkHostStr)
if err != nil {
return nil, fmt.Errorf("parse mac address: %w", err)
}
protoHostIP, protoHostNet, err := net.ParseCIDR(protoHostStr)
if err != nil {
return nil, fmt.Errorf("parse host ip: %w", err)
}
prefixLen, _ := protoHostNet.Mask.Size()
protoHost := tcpip.AddressWithPrefix{
Address: tcpip.AddrFromSlice(protoHostIP.To4()),
PrefixLen: prefixLen,
}
protoGatewayAddr := net.ParseIP(protoGatewayStr)
if protoGatewayAddr == nil {
return nil, fmt.Errorf("invalid gateway IP: %s", protoGatewayStr)
}
protoGateway := tcpip.AddrFromSlice(protoGatewayAddr.To4())
// start vmnet
vmn := vmnet.New()
if err := vmn.Start(hostIface); err != nil {
return nil, err
}
// create server
server := &Server{
VMNet: vmn,
linkHost: linkHost,
linkGateway: header.EthernetBroadcastAddress,
protoHost: protoHost,
protoGateway: protoGateway,
}
// create stack
st := stack.New(stack.Options{
NetworkProtocols: []stack.NetworkProtocolFactory{
ipv4.NewProtocol,
arp.NewProtocol,
},
TransportProtocols: []stack.TransportProtocolFactory{
tcp.NewProtocol,
udp.NewProtocol,
},
})
if err := st.CreateNIC(1, server); err != nil {
panic(err)
}
st.AddProtocolAddress(1, tcpip.ProtocolAddress{
Protocol: header.IPv4ProtocolNumber,
AddressWithPrefix: protoHost,
}, stack.AddressProperties{})
st.SetRouteTable([]tcpip.Route{
{
Destination: protoHost.Subnet(),
NIC: 1,
},
{
Destination: header.IPv4EmptySubnet,
NIC: 1,
Gateway: protoGateway,
},
})
server.stack = st
return server, nil
}
func (s *Server) Shutdown() {
s.stack.Close()
s.VMNet.Stop()
}
// ARPHardwareType implements stack.LinkEndpoint.
func (s *Server) ARPHardwareType() header.ARPHardwareType {
return header.ARPHardwareEther
}
// AddHeader implements stack.LinkEndpoint.
func (s *Server) AddHeader(pkt *stack.PacketBuffer) {
eth := header.Ethernet(pkt.LinkHeader().Push(header.EthernetMinimumSize))
eth.Encode(&header.EthernetFields{
Type: pkt.NetworkProtocolNumber,
SrcAddr: pkt.EgressRoute.LocalLinkAddress,
DstAddr: pkt.EgressRoute.RemoteLinkAddress,
})
}
// ParseHeader implements stack.LinkEndpoint.
func (s *Server) ParseHeader(pkt *stack.PacketBuffer) bool {
hdrBytes, ok := pkt.LinkHeader().Consume(header.EthernetMinimumSize)
if !ok {
return false
}
hdr := header.Ethernet(hdrBytes)
pkt.NetworkProtocolNumber = hdr.Type()
return true
}
// Attach implements stack.LinkEndpoint.
func (s *Server) Attach(dispatcher stack.NetworkDispatcher) {
log.Info().Msg("attached dispatcher")
s.dispatcher = dispatcher
}
// Capabilities implements stack.LinkEndpoint.
func (r *Server) Capabilities() stack.LinkEndpointCapabilities {
return stack.CapabilityResolutionRequired
}
// Close implements stack.LinkEndpoint.
func (s *Server) Close() {}
// IsAttached implements stack.LinkEndpoint.
func (s *Server) IsAttached() bool {
return s.dispatcher != nil
}
// LinkAddress implements stack.LinkEndpoint.
func (s *Server) LinkAddress() tcpip.LinkAddress {
return s.linkHost
}
// MTU implements stack.LinkEndpoint.
func (s *Server) MTU() uint32 {
return 1500
}
// MaxHeaderLength implements stack.LinkEndpoint.
func (s *Server) MaxHeaderLength() uint16 {
return header.EthernetMinimumSize
}
// SetLinkAddress implements stack.LinkEndpoint.
func (s *Server) SetLinkAddress(addr tcpip.LinkAddress) {
s.linkHost = addr
}
// SetMTU implements stack.LinkEndpoint.
func (s *Server) SetMTU(mtu uint32) {}
// SetOnCloseAction implements stack.LinkEndpoint.
func (s *Server) SetOnCloseAction(func()) {}
// Wait implements stack.LinkEndpoint.
func (s *Server) Wait() {}
// WritePackets implements stack.LinkEndpoint.
func (s *Server) WritePackets(pkts stack.PacketBufferList) (int, tcpip.Error) {
var n int
for _, pkt := range pkts.AsSlice() {
buf := pkt.ToBuffer()
data := buf.Flatten()
ether := header.Ethernet(data)
PrintPacket("put", ether)
_, err := s.Write(data)
if err != nil {
return n, &tcpip.ErrNotConnected{}
}
n++
}
return n, nil
}
func (r *Server) Loop() {
for {
bytes := make([]byte, r.MaxPacketSize)
bytesLen, err := r.Read(bytes)
if err != nil {
log.Error().Msgf("error while reading from vmnet: %s", err.Error())
continue
}
bytes = bytes[:bytesLen]
r.HandlePacket(bytes)
}
}
func (s *Server) HandlePacket(data []byte) {
ether := header.Ethernet(data)
if ether.DestinationAddress() != s.linkHost && ether.DestinationAddress() != header.EthernetBroadcastAddress {
// who the fuck are you
return
}
PrintPacket("got", ether)
payload := ether[header.EthernetMinimumSize:]
buf := stack.NewPacketBuffer(stack.PacketBufferOptions{
Payload: buffer.MakeWithData(payload),
})
if s.dispatcher != nil {
s.dispatcher.DeliverNetworkPacket(ether.Type(), buf)
}
}
func PrintPacket(what string, ether header.Ethernet) {
defer recover()
PrintPacketUnsafe(what, ether)
}
func PrintPacketUnsafe(what string, ether header.Ethernet) {
log.Trace().Msgf(
"%s Ethernet %d (%d bytes) from %s to %s",
what, ether.Type(), len(ether),
ether.SourceAddress().String(),
ether.DestinationAddress().String(),
)
payload := ether[header.EthernetMinimumSize:]
switch ether.Type() {
case header.ARPProtocolNumber:
arp := header.ARP(payload)
var typ string
if arp.Op() == header.ARPRequest {
typ = "Request"
} else {
typ = "Reply"
}
linkSrc := tcpip.LinkAddress(arp.HardwareAddressSender())
linkDst := tcpip.LinkAddress(arp.HardwareAddressTarget())
protoSrc := tcpip.AddrFromSlice(arp.ProtocolAddressSender())
protoDst := tcpip.AddrFromSlice(arp.ProtocolAddressTarget())
log.Trace().Msgf("\tARP %s from %s (%s) to %s (%s)", typ, protoSrc, linkSrc, protoDst, linkDst)
case header.IPv4ProtocolNumber:
ipv4 := header.IPv4(payload)
log.Trace().Msgf("\tIPv4 %d from %s to %s", ipv4.TransportProtocol(), ipv4.SourceAddress().String(), ipv4.DestinationAddress().String())
payload := ipv4[header.IPv4MinimumSize:]
switch ipv4.TransportProtocol() {
case header.ICMPv4ProtocolNumber:
icmp := header.ICMPv4(payload)
size := header.ICMPv4MinimumSize + len(icmp.Payload())
log.Trace().Msgf("\t\tICMPv4: %d bytes from %s: icmp_seq=%d ttl=%d", size, ipv4.SourceAddress(), icmp.Sequence(), ipv4.TTL())
case header.UDPProtocolNumber:
udp := header.UDP(payload)
log.Trace().Msgf("\t\tUDP from port %d to port %d: %d bytes", udp.SourcePort(), udp.DestinationPort(), udp.Length())
if udp.DestinationPort() == 4444 {
log.Trace().Msgf("\t\t\twoof! %s", string(udp.Payload()))
}
case header.TCPProtocolNumber:
tcp := header.TCP(payload)
log.Trace().Msgf("\t\tTCP %s from %d to %d", tcp.Flags().String(), tcp.SourcePort(), tcp.DestinationPort())
}
case header.IPv6ProtocolNumber:
ipv6 := header.IPv6(payload)
log.Trace().Msgf("\tIPv6 %d from %s to %s", ipv6.TransportProtocol(), ipv6.SourceAddress().String(), ipv6.DestinationAddress().String())
}
}