Refine 4in6 processing

This commit is contained in:
世界 2022-09-25 22:16:24 +08:00
parent c6586f19fa
commit c90a77a185
No known key found for this signature in database
GPG key ID: CD109927C34A63C4
12 changed files with 44 additions and 60 deletions

View file

@ -64,6 +64,7 @@ test:
cd test && \
go mod tidy && \
go test -v -tags "$(TAGS_TEST)" .
test_stdio:
@go test -v ./... && \
cd test && \
@ -71,7 +72,7 @@ test_stdio:
go test -v -tags "$(TAGS_TEST),force_stdio" .
clean:
rm -rf bin dist
rm -rf bin dist sing-box
rm -f $(shell go env GOPATH)/sing-box
update:

View file

@ -146,7 +146,7 @@ func (d *DefaultDialer) DialContext(ctx context.Context, network string, address
case N.NetworkUDP:
return d.udpDialer.DialContext(ctx, network, address.String())
}
return d.dialer.DialContext(ctx, network, address.Unwrap().String())
return d.dialer.DialContext(ctx, network, address.String())
}
func (d *DefaultDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {

View file

@ -28,11 +28,5 @@ type Info struct {
}
func FindProcessInfo(searcher Searcher, ctx context.Context, network string, source netip.AddrPort, destination netip.AddrPort) (*Info, error) {
info, err := findProcessInfo(searcher, ctx, network, source, destination)
if err != nil {
if source.Addr().Is4In6() {
info, err = findProcessInfo(searcher, ctx, network, netip.AddrPortFrom(netip.AddrFrom4(source.Addr().As4()), source.Port()), destination)
}
}
return info, err
return findProcessInfo(searcher, ctx, network, source, destination)
}

View file

@ -36,8 +36,8 @@ func (l *Listener) Accept() (net.Conn, error) {
}
if header != nil {
return &bufio.AddrConn{Conn: conn, Metadata: M.Metadata{
Source: M.SocksaddrFromNet(header.SourceAddr),
Destination: M.SocksaddrFromNet(header.DestinationAddr),
Source: M.SocksaddrFromNet(header.SourceAddr).Unwrap(),
Destination: M.SocksaddrFromNet(header.DestinationAddr).Unwrap(),
}}, nil
}
return conn, nil

12
go.mod
View file

@ -23,10 +23,10 @@ require (
github.com/pires/go-proxyproto v0.6.2
github.com/refraction-networking/utls v1.1.2
github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb
github.com/sagernet/sing v0.0.0-20220921101604-86d7d510231f
github.com/sagernet/sing v0.0.0-20220925112014-b12b8b7fd220
github.com/sagernet/sing-dns v0.0.0-20220915084601-812e0864b45b
github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6
github.com/sagernet/sing-tun v0.0.0-20220922083325-80ee99472704
github.com/sagernet/sing-tun v0.0.0-20220925112147-6bad0c2380ca
github.com/sagernet/sing-vmess v0.0.0-20220925083655-063bc85ea685
github.com/sagernet/smux v0.0.0-20220831015742-e0f1988e3195
github.com/sagernet/websocket v0.0.0-20220913015213-615516348b4e
@ -34,10 +34,10 @@ require (
github.com/stretchr/testify v1.8.0
go.etcd.io/bbolt v1.3.6
go.uber.org/atomic v1.10.0
go4.org/netipx v0.0.0-20220812043211-3cc044ffd68d
golang.org/x/crypto v0.0.0-20220919173607-35f4265a4bc0
golang.org/x/net v0.0.0-20220909164309-bea034e7d591
golang.org/x/sys v0.0.0-20220913120320-3275c407cedc
go4.org/netipx v0.0.0-20220925034521-797b0c90d8ab
golang.org/x/crypto v0.0.0-20220924013350-4ba4fb4dd9e7
golang.org/x/net v0.0.0-20220923203811-8be639271d50
golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8
golang.zx2c4.com/wireguard v0.0.0-20220829161405-d1d08426b27b
google.golang.org/grpc v1.49.0
google.golang.org/protobuf v1.28.1

24
go.sum
View file

@ -145,14 +145,14 @@ github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb h1:wc0yQ+SBn4TaTY
github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb/go.mod h1:MIccjRKnPTjWwAOpl+AUGWOkzyTd9tERytudxu+1ra4=
github.com/sagernet/sing v0.0.0-20220812082120-05f9836bff8f/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
github.com/sagernet/sing v0.0.0-20220817130738-ce854cda8522/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
github.com/sagernet/sing v0.0.0-20220921101604-86d7d510231f h1:GX416thAwyc0vHBOal/qplvdhFgYO2dHD5GqADCJ0Ig=
github.com/sagernet/sing v0.0.0-20220921101604-86d7d510231f/go.mod h1:x3NHUeJBQwV75L51zwmLKQdLtRvR+M4PmXkfQtU1vIY=
github.com/sagernet/sing v0.0.0-20220925112014-b12b8b7fd220 h1:fQk/BHOeHw5murjeNTdmkXmDy9cMlbubRINRH7GDuu4=
github.com/sagernet/sing v0.0.0-20220925112014-b12b8b7fd220/go.mod h1:5/u6RMDMoGIkSNtrZb41kJvyIFg3Ysn69P3WiAu8m0c=
github.com/sagernet/sing-dns v0.0.0-20220915084601-812e0864b45b h1:cXCMNJ9heZ+c6l+qUcku60x9KyXo4SOAaJfg/6spOmU=
github.com/sagernet/sing-dns v0.0.0-20220915084601-812e0864b45b/go.mod h1:SrvWLfOSlnFmH32CWXicfilAGgIXR0VjrH6yRbuXYww=
github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6 h1:JJfDeYYhWunvtxsU/mOVNTmFQmnzGx9dY034qG6G3g4=
github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6/go.mod h1:EX3RbZvrwAkPI2nuGa78T2iQXmrkT+/VQtskjou42xM=
github.com/sagernet/sing-tun v0.0.0-20220922083325-80ee99472704 h1:DOQQXQbB2gq4n2FuMHrL07HRs2naCCsuiu/9l1JFb9A=
github.com/sagernet/sing-tun v0.0.0-20220922083325-80ee99472704/go.mod h1:5AhPUv9jWDQ3pv3Mj78SL/1TSjhoaj6WNASxRKLqXqM=
github.com/sagernet/sing-tun v0.0.0-20220925112147-6bad0c2380ca h1:Owgx9izFNYyMyUZ61td+mL3vumBhJz4zNismYlCyQbw=
github.com/sagernet/sing-tun v0.0.0-20220925112147-6bad0c2380ca/go.mod h1:ftP5VXlp3RJO5+WS3mPFk7jB9B/K/QrPEZX3BUORGQY=
github.com/sagernet/sing-vmess v0.0.0-20220925083655-063bc85ea685 h1:AZzFNRR/ZwMTceUQ1b/mxx6oyKqmFymdMn/yleJmoVM=
github.com/sagernet/sing-vmess v0.0.0-20220925083655-063bc85ea685/go.mod h1:bwhAdSNET1X+j9DOXGj9NIQR39xgcWIk1rOQ9lLD+gM=
github.com/sagernet/smux v0.0.0-20220831015742-e0f1988e3195 h1:5VBIbVw9q7aKbrFdT83mjkyvQ+VaRsQ6yflTepfln38=
@ -188,16 +188,16 @@ go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9i
go.uber.org/zap v1.21.0/go.mod h1:wjWOCqI0f2ZZrJF/UufIOkiC8ii6tm1iqIsLo76RfJw=
go.uber.org/zap v1.22.0 h1:Zcye5DUgBloQ9BaT4qc9BnjOFog5TvBSAGkJ3Nf70c0=
go.uber.org/zap v1.22.0/go.mod h1:H4siCOZOrAolnUPJEkfaSjDqyP+BDS0DdDWzwcgt3+U=
go4.org/netipx v0.0.0-20220812043211-3cc044ffd68d h1:ggxwEf5eu0l8v+87VhX1czFh8zJul3hK16Gmruxn7hw=
go4.org/netipx v0.0.0-20220812043211-3cc044ffd68d/go.mod h1:tgPU4N2u9RByaTN3NC2p9xOzyFpte4jYwsIIRF7XlSc=
go4.org/netipx v0.0.0-20220925034521-797b0c90d8ab h1:+yW1yrZ09EYNu1spCUOHBBNRbrLnfmutwyhbhCv3b6Q=
go4.org/netipx v0.0.0-20220925034521-797b0c90d8ab/go.mod h1:tgPU4N2u9RByaTN3NC2p9xOzyFpte4jYwsIIRF7XlSc=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190404164418-38d8ce5564a5/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20220919173607-35f4265a4bc0 h1:a5Yg6ylndHHYJqIPrdq0AhvR6KTvDTAvgBtaidhEevY=
golang.org/x/crypto v0.0.0-20220919173607-35f4265a4bc0/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/crypto v0.0.0-20220924013350-4ba4fb4dd9e7 h1:WJywXQVIb56P2kAvXeMGTIgQ1ZHQxR60+F9dLsodECc=
golang.org/x/crypto v0.0.0-20220924013350-4ba4fb4dd9e7/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e h1:+WEEuIdZHnUeJJmEUjyYC2gfUMj69yZXw17EnHg/otA=
golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e/go.mod h1:Kr81I6Kryrl9sr8s2FK3vxD90NdsKWRuOIl2O4CvYbA=
@ -229,8 +229,8 @@ golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qx
golang.org/x/net v0.0.0-20210726213435-c6fcb2dbf985/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/net v0.0.0-20211111160137-58aab5ef257a/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/net v0.0.0-20220630215102-69896b714898/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
golang.org/x/net v0.0.0-20220909164309-bea034e7d591 h1:D0B/7al0LLrVC8aWF4+oxpv/m8bc7ViFfVS8/gXGdqI=
golang.org/x/net v0.0.0-20220909164309-bea034e7d591/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
golang.org/x/net v0.0.0-20220923203811-8be639271d50 h1:vKyz8L3zkd+xrMeIaBsQ/MNVPVFSffdaU3ZyYlBGFnI=
golang.org/x/net v0.0.0-20220923203811-8be639271d50/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@ -264,8 +264,8 @@ golang.org/x/sys v0.0.0-20220412211240-33da011f77ad/go.mod h1:oPkhp1MJrh7nUepCBc
golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220731174439-a90be440212d/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220913120320-3275c407cedc h1:dpclq5m2YrqPGStKmtw7IcNbKLfbIqKXvNxDJKdIKYc=
golang.org/x/sys v0.0.0-20220913120320-3275c407cedc/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8 h1:h+EGohizhe9XlX18rfpa8k8RAc5XyaeamM+0VHRd4lc=
golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=

View file

@ -141,13 +141,13 @@ func (a *myInboundAdapter) createMetadata(conn net.Conn, metadata adapter.Inboun
metadata.SniffOverrideDestination = a.listenOptions.SniffOverrideDestination
metadata.DomainStrategy = dns.DomainStrategy(a.listenOptions.DomainStrategy)
if !metadata.Source.IsValid() {
metadata.Source = M.SocksaddrFromNet(conn.RemoteAddr())
metadata.Source = M.SocksaddrFromNet(conn.RemoteAddr()).Unwrap()
}
if !metadata.Destination.IsValid() {
metadata.Destination = M.SocksaddrFromNet(conn.LocalAddr())
metadata.Destination = M.SocksaddrFromNet(conn.LocalAddr()).Unwrap()
}
if tcpConn, isTCP := common.Cast[*net.TCPConn](conn); isTCP {
metadata.OriginDestination = M.SocksaddrFromNet(tcpConn.LocalAddr())
metadata.OriginDestination = M.SocksaddrFromNet(tcpConn.LocalAddr()).Unwrap()
}
return metadata
}

View file

@ -54,7 +54,7 @@ func (a *myInboundAdapter) loopUDPIn() {
metadata.SniffEnabled = a.listenOptions.SniffEnabled
metadata.SniffOverrideDestination = a.listenOptions.SniffOverrideDestination
metadata.DomainStrategy = dns.DomainStrategy(a.listenOptions.DomainStrategy)
metadata.Source = M.SocksaddrFromNetIP(addr)
metadata.Source = M.SocksaddrFromNetIP(addr).Unwrap()
metadata.OriginDestination = a.udpAddr
err = a.packetHandler.NewPacket(a.ctx, packetService, buffer, metadata)
if err != nil {
@ -86,7 +86,7 @@ func (a *myInboundAdapter) loopUDPOOBIn() {
metadata.SniffEnabled = a.listenOptions.SniffEnabled
metadata.SniffOverrideDestination = a.listenOptions.SniffOverrideDestination
metadata.DomainStrategy = dns.DomainStrategy(a.listenOptions.DomainStrategy)
metadata.Source = M.SocksaddrFromNetIP(addr)
metadata.Source = M.SocksaddrFromNetIP(addr).Unwrap()
metadata.OriginDestination = a.udpAddr
err = a.oobPacketHandler.NewPacket(a.ctx, packetService, buffer, oob[:oobN], metadata)
if err != nil {
@ -112,7 +112,7 @@ func (a *myInboundAdapter) loopUDPInThreadSafe() {
metadata.SniffEnabled = a.listenOptions.SniffEnabled
metadata.SniffOverrideDestination = a.listenOptions.SniffOverrideDestination
metadata.DomainStrategy = dns.DomainStrategy(a.listenOptions.DomainStrategy)
metadata.Source = M.SocksaddrFromNetIP(addr)
metadata.Source = M.SocksaddrFromNetIP(addr).Unwrap()
metadata.OriginDestination = a.udpAddr
err = a.packetHandler.NewPacket(a.ctx, packetService, buffer, metadata)
if err != nil {
@ -140,7 +140,7 @@ func (a *myInboundAdapter) loopUDPOOBInThreadSafe() {
metadata.SniffEnabled = a.listenOptions.SniffEnabled
metadata.SniffOverrideDestination = a.listenOptions.SniffOverrideDestination
metadata.DomainStrategy = dns.DomainStrategy(a.listenOptions.DomainStrategy)
metadata.Source = M.SocksaddrFromNetIP(addr)
metadata.Source = M.SocksaddrFromNetIP(addr).Unwrap()
metadata.OriginDestination = a.udpAddr
err = a.oobPacketHandler.NewPacket(a.ctx, packetService, buffer, oob[:oobN], metadata)
if err != nil {

View file

@ -261,9 +261,9 @@ func (h *Hysteria) acceptStream(ctx context.Context, conn quic.Connection, strea
metadata.SniffEnabled = h.listenOptions.SniffEnabled
metadata.SniffOverrideDestination = h.listenOptions.SniffOverrideDestination
metadata.DomainStrategy = dns.DomainStrategy(h.listenOptions.DomainStrategy)
metadata.Source = M.SocksaddrFromNet(conn.RemoteAddr())
metadata.OriginDestination = M.SocksaddrFromNet(conn.LocalAddr())
metadata.Destination = M.ParseSocksaddrHostPort(request.Host, request.Port)
metadata.Source = M.SocksaddrFromNet(conn.RemoteAddr()).Unwrap()
metadata.OriginDestination = M.SocksaddrFromNet(conn.LocalAddr()).Unwrap()
metadata.Destination = M.ParseSocksaddrHostPort(request.Host, request.Port).Unwrap()
if !request.UDP {
err = hysteria.WriteServerResponse(stream, hysteria.ServerResponse{

View file

@ -75,7 +75,7 @@ func (t *TProxy) Start() error {
}
func (t *TProxy) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
metadata.Destination = M.SocksaddrFromNet(conn.LocalAddr())
metadata.Destination = M.SocksaddrFromNet(conn.LocalAddr()).Unwrap()
return t.newConnection(ctx, conn, metadata)
}
@ -84,9 +84,9 @@ func (t *TProxy) NewPacket(ctx context.Context, conn N.PacketConn, buffer *buf.B
if err != nil {
return E.Cause(err, "get tproxy destination")
}
metadata.Destination = M.SocksaddrFromNetIP(destination)
metadata.Destination = M.SocksaddrFromNetIP(destination).Unwrap()
t.udpNat.NewContextPacket(ctx, metadata.Source.AddrPort(), buffer, adapter.UpstreamMetadata(metadata), func(natConn N.PacketConn) (context.Context, N.PacketWriter) {
return adapter.WithContext(log.ContextWithNewID(ctx), &metadata), &tproxyPacketWriter{ctx: ctx, source: natConn}
return adapter.WithContext(log.ContextWithNewID(ctx), &metadata), &tproxyPacketWriter{ctx: ctx, source: natConn, destination: metadata.Destination}
})
return nil
}
@ -100,10 +100,7 @@ type tproxyPacketWriter struct {
func (w *tproxyPacketWriter) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
defer buffer.Release()
destination = destination.Unwrap()
if !w.destination.Addr.IsValid() {
w.destination = destination
} else if w.destination == destination && w.conn != nil {
if w.destination == destination && w.conn != nil {
_, err := w.conn.WriteToUDPAddrPort(buffer.Bytes(), M.AddrPortFromNet(w.source.LocalAddr()))
if err == nil {
w.conn = nil

View file

@ -59,13 +59,13 @@ func NewIPCIDRItem(isSource bool, prefixStrings []string) (*IPCIDRItem, error) {
func (r *IPCIDRItem) Match(metadata *adapter.InboundContext) bool {
if r.isSource {
return r.match(metadata.Source.Addr)
return r.ipSet.Contains(metadata.Source.Addr)
} else {
if metadata.Destination.IsIP() {
return r.match(metadata.Destination.Addr)
return r.ipSet.Contains(metadata.Destination.Addr)
} else {
for _, address := range metadata.DestinationAddresses {
if r.match(address) {
if r.ipSet.Contains(address) {
return true
}
}
@ -74,14 +74,6 @@ func (r *IPCIDRItem) Match(metadata *adapter.InboundContext) bool {
return false
}
func (r *IPCIDRItem) match(address netip.Addr) bool {
if address.Is4In6() {
return r.ipSet.Contains(netip.AddrFrom4(address.As4()))
} else {
return r.ipSet.Contains(address)
}
}
func (r *IPCIDRItem) String() string {
return r.description
}

View file

@ -462,7 +462,7 @@ func (c *PacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, er
return
}
err = common.Error(buffer.Write(msg.Data))
destination = M.ParseSocksaddrHostPort(msg.Host, msg.Port)
destination = M.ParseSocksaddrHostPort(msg.Host, msg.Port).Unwrap()
return
}
@ -473,14 +473,14 @@ func (c *PacketConn) ReadPacketThreadSafe() (buffer *buf.Buffer, destination M.S
return
}
buffer = buf.As(msg.Data)
destination = M.ParseSocksaddrHostPort(msg.Host, msg.Port)
destination = M.ParseSocksaddrHostPort(msg.Host, msg.Port).Unwrap()
return
}
func (c *PacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
return WriteUDPMessage(c.session, UDPMessage{
SessionID: c.sessionId,
Host: destination.Unwrap().AddrString(),
Host: destination.AddrString(),
Port: destination.Port,
FragCount: 1,
Data: buffer.Bytes(),