2018-05-24 23:47:16 -05:00
|
|
|
// Copyright 2018 Google LLC. All Rights Reserved.
|
|
|
|
|
//
|
|
|
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
|
|
// you may not use this file except in compliance with the License.
|
|
|
|
|
// You may obtain a copy of the License at
|
|
|
|
|
//
|
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
|
//
|
|
|
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
|
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
|
|
// See the License for the specific language governing permissions and
|
|
|
|
|
// limitations under the License.
|
|
|
|
|
|
|
|
|
|
package nftables_test
|
|
|
|
|
|
|
|
|
|
import (
|
|
|
|
|
"bytes"
|
2019-01-28 22:56:40 -06:00
|
|
|
"flag"
|
2018-10-22 02:22:02 -05:00
|
|
|
"fmt"
|
2018-06-04 15:48:32 -05:00
|
|
|
"net"
|
2019-02-18 06:01:32 -06:00
|
|
|
"reflect"
|
2019-01-28 22:56:40 -06:00
|
|
|
"runtime"
|
2018-10-22 02:22:02 -05:00
|
|
|
"strings"
|
2018-05-24 23:47:16 -05:00
|
|
|
"testing"
|
|
|
|
|
|
|
|
|
|
"github.com/google/nftables"
|
2018-06-04 15:48:32 -05:00
|
|
|
"github.com/google/nftables/binaryutil"
|
2018-05-24 23:47:16 -05:00
|
|
|
"github.com/google/nftables/expr"
|
|
|
|
|
"github.com/mdlayher/netlink"
|
2019-01-28 22:56:40 -06:00
|
|
|
"github.com/vishvananda/netns"
|
2018-06-04 15:48:32 -05:00
|
|
|
"golang.org/x/sys/unix"
|
2018-05-24 23:47:16 -05:00
|
|
|
)
|
|
|
|
|
|
2019-01-28 22:56:40 -06:00
|
|
|
var (
|
|
|
|
|
enableSysTests = flag.Bool("run_system_tests", false, "Run tests that operate against the live kernel")
|
|
|
|
|
)
|
|
|
|
|
|
2018-10-22 02:22:02 -05:00
|
|
|
// nfdump returns a hexdump of 4 bytes per line (like nft --debug=all), allowing
|
|
|
|
|
// users to make sense of large byte literals more easily.
|
|
|
|
|
func nfdump(b []byte) string {
|
|
|
|
|
var buf bytes.Buffer
|
|
|
|
|
i := 0
|
|
|
|
|
for ; i < len(b); i += 4 {
|
|
|
|
|
// TODO: show printable characters as ASCII
|
|
|
|
|
fmt.Fprintf(&buf, "%02x %02x %02x %02x\n",
|
|
|
|
|
b[i],
|
|
|
|
|
b[i+1],
|
|
|
|
|
b[i+2],
|
|
|
|
|
b[i+3])
|
|
|
|
|
}
|
|
|
|
|
for ; i < len(b); i++ {
|
|
|
|
|
fmt.Fprintf(&buf, "%02x ", b[i])
|
|
|
|
|
}
|
|
|
|
|
return buf.String()
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// linediff returns a side-by-side diff of two nfdump() return values, flagging
|
|
|
|
|
// lines which are not equal with an exclamation point prefix.
|
|
|
|
|
func linediff(a, b string) string {
|
|
|
|
|
var buf bytes.Buffer
|
|
|
|
|
fmt.Fprintf(&buf, "got -- want\n")
|
|
|
|
|
linesA := strings.Split(a, "\n")
|
|
|
|
|
linesB := strings.Split(b, "\n")
|
|
|
|
|
for idx, lineA := range linesA {
|
|
|
|
|
if idx >= len(linesB) {
|
|
|
|
|
break
|
|
|
|
|
}
|
|
|
|
|
lineB := linesB[idx]
|
|
|
|
|
prefix := "! "
|
|
|
|
|
if lineA == lineB {
|
|
|
|
|
prefix = " "
|
|
|
|
|
}
|
|
|
|
|
fmt.Fprintf(&buf, "%s%s -- %s\n", prefix, lineA, lineB)
|
|
|
|
|
}
|
|
|
|
|
return buf.String()
|
|
|
|
|
}
|
|
|
|
|
|
2018-06-04 15:48:32 -05:00
|
|
|
func ifname(n string) []byte {
|
|
|
|
|
b := make([]byte, 16)
|
|
|
|
|
copy(b, []byte(n+"\x00"))
|
|
|
|
|
return b
|
|
|
|
|
}
|
2018-05-24 23:47:16 -05:00
|
|
|
|
2019-01-28 22:56:40 -06:00
|
|
|
// openSystemNFTConn returns a netlink connection that tests against
|
|
|
|
|
// the running kernel in a separate network namespace.
|
|
|
|
|
// cleanupSystemNFTConn() must be called from a defer to cleanup
|
|
|
|
|
// created network namespace.
|
|
|
|
|
func openSystemNFTConn(t *testing.T) (*nftables.Conn, netns.NsHandle) {
|
|
|
|
|
t.Helper()
|
|
|
|
|
if !*enableSysTests {
|
|
|
|
|
t.SkipNow()
|
|
|
|
|
}
|
|
|
|
|
// We lock the goroutine into the current thread, as namespace operations
|
|
|
|
|
// such as those invoked by `netns.New()` are thread-local. This is undone
|
|
|
|
|
// in cleanupSystemNFTConn().
|
|
|
|
|
runtime.LockOSThread()
|
|
|
|
|
|
|
|
|
|
ns, err := netns.New()
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatalf("netns.New() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
return &nftables.Conn{NetNS: int(ns)}, ns
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func cleanupSystemNFTConn(t *testing.T, newNS netns.NsHandle) {
|
|
|
|
|
defer runtime.UnlockOSThread()
|
|
|
|
|
|
|
|
|
|
if err := newNS.Close(); err != nil {
|
|
|
|
|
t.Fatalf("newNS.Close() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2018-06-04 15:48:32 -05:00
|
|
|
func TestConfigureNAT(t *testing.T) {
|
2018-05-24 23:47:16 -05:00
|
|
|
// The want byte sequences come from stracing nft(8), e.g.:
|
|
|
|
|
// strace -f -v -x -s 2048 -eraw=sendto nft add table ip nat
|
|
|
|
|
//
|
|
|
|
|
// The nft(8) command sequence was taken from:
|
|
|
|
|
// https://wiki.nftables.org/wiki-nftables/index.php/Performing_Network_Address_Translation_(NAT)
|
|
|
|
|
want := [][]byte{
|
|
|
|
|
// batch begin
|
2018-10-05 10:58:05 -05:00
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
2018-06-14 01:26:52 -05:00
|
|
|
// nft flush ruleset
|
|
|
|
|
[]byte("\x00\x00\x00\x00"),
|
2018-05-24 23:47:16 -05:00
|
|
|
// nft add table ip nat
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
|
|
|
|
|
// nft add chain nat prerouting '{' type nat hook prerouting priority 0 \; '}'
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x0f\x00\x03\x00\x70\x72\x65\x72\x6f\x75\x74\x69\x6e\x67\x00\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00\x08\x00\x07\x00\x6e\x61\x74\x00"),
|
2018-10-03 11:23:26 -05:00
|
|
|
// nft add chain nat postrouting '{' type nat hook postrouting priority 100 \; '}'
|
2018-05-24 23:47:16 -05:00
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x10\x00\x03\x00\x70\x6f\x73\x74\x72\x6f\x75\x74\x69\x6e\x67\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x04\x08\x00\x02\x00\x00\x00\x00\x64\x08\x00\x07\x00\x6e\x61\x74\x00"),
|
2018-06-04 15:48:32 -05:00
|
|
|
// nft add rule nat postrouting oifname uplink0 masquerade
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x10\x00\x02\x00\x70\x6f\x73\x74\x72\x6f\x75\x74\x69\x6e\x67\x00\x74\x00\x04\x80\x24\x00\x01\x80\x09\x00\x01\x00\x6d\x65\x74\x61\x00\x00\x00\x00\x14\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x07\x08\x00\x01\x00\x00\x00\x00\x01\x38\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x2c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x18\x00\x03\x80\x14\x00\x01\x00\x75\x70\x6c\x69\x6e\x6b\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x14\x00\x01\x80\x09\x00\x01\x00\x6d\x61\x73\x71\x00\x00\x00\x00\x04\x00\x02\x80"),
|
|
|
|
|
// nft add rule nat prerouting iif uplink0 tcp dport 4070 dnat 192.168.23.2:4080
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x0f\x00\x02\x00\x70\x72\x65\x72\x6f\x75\x74\x69\x6e\x67\x00\x00\x98\x01\x04\x80\x24\x00\x01\x80\x09\x00\x01\x00\x6d\x65\x74\x61\x00\x00\x00\x00\x14\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x06\x08\x00\x01\x00\x00\x00\x00\x01\x38\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x2c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x18\x00\x03\x80\x14\x00\x01\x00\x75\x70\x6c\x69\x6e\x6b\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x24\x00\x01\x80\x09\x00\x01\x00\x6d\x65\x74\x61\x00\x00\x00\x00\x14\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x10\x08\x00\x01\x00\x00\x00\x00\x01\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0c\x00\x03\x80\x05\x00\x01\x00\x06\x00\x00\x00\x34\x00\x01\x80\x0c\x00\x01\x00\x70\x61\x79\x6c\x6f\x61\x64\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x02\x08\x00\x03\x00\x00\x00\x00\x02\x08\x00\x04\x00\x00\x00\x00\x02\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0c\x00\x03\x80\x06\x00\x01\x00\x0f\xe6\x00\x00\x2c\x00\x01\x80\x0e\x00\x01\x00\x69\x6d\x6d\x65\x64\x69\x61\x74\x65\x00\x00\x00\x18\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x0c\x00\x02\x80\x08\x00\x01\x00\xc0\xa8\x17\x02\x2c\x00\x01\x80\x0e\x00\x01\x00\x69\x6d\x6d\x65\x64\x69\x61\x74\x65\x00\x00\x00\x18\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x02\x0c\x00\x02\x80\x06\x00\x01\x00\x0f\xf0\x00\x00\x30\x00\x01\x80\x08\x00\x01\x00\x6e\x61\x74\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x02\x08\x00\x03\x00\x00\x00\x00\x01\x08\x00\x05\x00\x00\x00\x00\x02"),
|
2018-06-14 15:26:38 -05:00
|
|
|
// nft add rule nat prerouting iifname uplink0 udp dport 4070-4090 dnat 192.168.23.2:4070-4090
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x0f\x00\x02\x00\x70\x72\x65\x72\x6f\x75\x74\x69\x6e\x67\x00\x00\xf8\x01\x04\x80\x24\x00\x01\x80\x09\x00\x01\x00\x6d\x65\x74\x61\x00\x00\x00\x00\x14\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x06\x08\x00\x01\x00\x00\x00\x00\x01\x38\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x2c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x18\x00\x03\x80\x14\x00\x01\x00\x75\x70\x6c\x69\x6e\x6b\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x24\x00\x01\x80\x09\x00\x01\x00\x6d\x65\x74\x61\x00\x00\x00\x00\x14\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x10\x08\x00\x01\x00\x00\x00\x00\x01\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0c\x00\x03\x80\x05\x00\x01\x00\x11\x00\x00\x00\x34\x00\x01\x80\x0c\x00\x01\x00\x70\x61\x79\x6c\x6f\x61\x64\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x02\x08\x00\x03\x00\x00\x00\x00\x02\x08\x00\x04\x00\x00\x00\x00\x02\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x05\x0c\x00\x03\x80\x06\x00\x01\x00\x0f\xe6\x00\x00\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x03\x0c\x00\x03\x80\x06\x00\x01\x00\x0f\xfa\x00\x00\x2c\x00\x01\x80\x0e\x00\x01\x00\x69\x6d\x6d\x65\x64\x69\x61\x74\x65\x00\x00\x00\x18\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x0c\x00\x02\x80\x08\x00\x01\x00\xc0\xa8\x17\x02\x2c\x00\x01\x80\x0e\x00\x01\x00\x69\x6d\x6d\x65\x64\x69\x61\x74\x65\x00\x00\x00\x18\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x02\x0c\x00\x02\x80\x06\x00\x01\x00\x0f\xe6\x00\x00\x2c\x00\x01\x80\x0e\x00\x01\x00\x69\x6d\x6d\x65\x64\x69\x61\x74\x65\x00\x00\x00\x18\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x03\x0c\x00\x02\x80\x06\x00\x01\x00\x0f\xfa\x00\x00\x38\x00\x01\x80\x08\x00\x01\x00\x6e\x61\x74\x00\x2c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x02\x08\x00\x03\x00\x00\x00\x00\x01\x08\x00\x05\x00\x00\x00\x00\x02\x08\x00\x06\x00\x00\x00\x00\x03"),
|
2018-05-24 23:47:16 -05:00
|
|
|
// batch end
|
2018-10-05 10:58:05 -05:00
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
2018-05-24 23:47:16 -05:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c := &nftables.Conn{
|
|
|
|
|
TestDial: func(req []netlink.Message) ([]netlink.Message, error) {
|
|
|
|
|
for idx, msg := range req {
|
|
|
|
|
b, err := msg.MarshalBinary()
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
if len(b) < 16 {
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
b = b[16:]
|
|
|
|
|
if len(want) == 0 {
|
|
|
|
|
t.Errorf("no want entry for message %d: %x", idx, b)
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
if got, want := b, want[0]; !bytes.Equal(got, want) {
|
2018-10-22 02:22:02 -05:00
|
|
|
t.Errorf("message %d: %s", idx, linediff(nfdump(got), nfdump(want)))
|
2018-05-24 23:47:16 -05:00
|
|
|
}
|
|
|
|
|
want = want[1:]
|
|
|
|
|
}
|
|
|
|
|
return req, nil
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
|
2018-06-14 01:26:52 -05:00
|
|
|
c.FlushRuleset()
|
|
|
|
|
|
2018-05-24 23:47:16 -05:00
|
|
|
nat := c.AddTable(&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "nat",
|
|
|
|
|
})
|
|
|
|
|
|
2018-06-04 15:48:32 -05:00
|
|
|
prerouting := c.AddChain(&nftables.Chain{
|
2018-05-24 23:47:16 -05:00
|
|
|
Name: "prerouting",
|
|
|
|
|
Hooknum: nftables.ChainHookPrerouting,
|
|
|
|
|
Priority: nftables.ChainPriorityFilter,
|
|
|
|
|
Table: nat,
|
|
|
|
|
Type: nftables.ChainTypeNAT,
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
postrouting := c.AddChain(&nftables.Chain{
|
|
|
|
|
Name: "postrouting",
|
|
|
|
|
Hooknum: nftables.ChainHookPostrouting,
|
|
|
|
|
Priority: nftables.ChainPriorityNATSource,
|
|
|
|
|
Table: nat,
|
|
|
|
|
Type: nftables.ChainTypeNAT,
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
c.AddRule(&nftables.Rule{
|
|
|
|
|
Table: nat,
|
|
|
|
|
Chain: postrouting,
|
|
|
|
|
Exprs: []expr.Any{
|
2018-06-04 15:48:32 -05:00
|
|
|
// meta load oifname => reg 1
|
|
|
|
|
&expr.Meta{Key: expr.MetaKeyOIFNAME, Register: 1},
|
|
|
|
|
// cmp eq reg 1 0x696c7075 0x00306b6e 0x00000000 0x00000000
|
2018-05-24 23:47:16 -05:00
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
2018-06-04 15:48:32 -05:00
|
|
|
Data: ifname("uplink0"),
|
2018-05-24 23:47:16 -05:00
|
|
|
},
|
|
|
|
|
// masq
|
|
|
|
|
&expr.Masq{},
|
|
|
|
|
},
|
|
|
|
|
})
|
|
|
|
|
|
2018-06-04 15:48:32 -05:00
|
|
|
c.AddRule(&nftables.Rule{
|
|
|
|
|
Table: nat,
|
|
|
|
|
Chain: prerouting,
|
|
|
|
|
Exprs: []expr.Any{
|
|
|
|
|
// [ meta load iifname => reg 1 ]
|
|
|
|
|
&expr.Meta{Key: expr.MetaKeyIIFNAME, Register: 1},
|
|
|
|
|
// [ cmp eq reg 1 0x696c7075 0x00306b6e 0x00000000 0x00000000 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: ifname("uplink0"),
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ meta load l4proto => reg 1 ]
|
|
|
|
|
&expr.Meta{Key: expr.MetaKeyL4PROTO, Register: 1},
|
|
|
|
|
// [ cmp eq reg 1 0x00000006 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: []byte{unix.IPPROTO_TCP},
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ payload load 2b @ transport header + 2 => reg 1 ]
|
|
|
|
|
&expr.Payload{
|
|
|
|
|
DestRegister: 1,
|
|
|
|
|
Base: expr.PayloadBaseTransportHeader,
|
|
|
|
|
Offset: 2, // TODO
|
|
|
|
|
Len: 2, // TODO
|
|
|
|
|
},
|
|
|
|
|
// [ cmp eq reg 1 0x0000e60f ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: binaryutil.BigEndian.PutUint16(4070),
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ immediate reg 1 0x0217a8c0 ]
|
|
|
|
|
&expr.Immediate{
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: net.ParseIP("192.168.23.2").To4(),
|
|
|
|
|
},
|
|
|
|
|
// [ immediate reg 2 0x0000f00f ]
|
|
|
|
|
&expr.Immediate{
|
|
|
|
|
Register: 2,
|
|
|
|
|
Data: binaryutil.BigEndian.PutUint16(4080),
|
|
|
|
|
},
|
|
|
|
|
// [ nat dnat ip addr_min reg 1 addr_max reg 0 proto_min reg 2 proto_max reg 0 ]
|
|
|
|
|
&expr.NAT{
|
|
|
|
|
Type: expr.NATTypeDestNAT,
|
|
|
|
|
Family: unix.NFPROTO_IPV4,
|
|
|
|
|
RegAddrMin: 1,
|
|
|
|
|
RegProtoMin: 2,
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
})
|
|
|
|
|
|
2018-06-14 15:26:38 -05:00
|
|
|
c.AddRule(&nftables.Rule{
|
|
|
|
|
Table: nat,
|
|
|
|
|
Chain: prerouting,
|
|
|
|
|
Exprs: []expr.Any{
|
|
|
|
|
// [ meta load iifname => reg 1 ]
|
|
|
|
|
&expr.Meta{Key: expr.MetaKeyIIFNAME, Register: 1},
|
|
|
|
|
// [ cmp eq reg 1 0x696c7075 0x00306b6e 0x00000000 0x00000000 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: ifname("uplink0"),
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ meta load l4proto => reg 1 ]
|
|
|
|
|
&expr.Meta{Key: expr.MetaKeyL4PROTO, Register: 1},
|
|
|
|
|
// [ cmp eq reg 1 0x00000006 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: []byte{unix.IPPROTO_UDP},
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ payload load 2b @ transport header + 2 => reg 1 ]
|
|
|
|
|
&expr.Payload{
|
|
|
|
|
DestRegister: 1,
|
|
|
|
|
Base: expr.PayloadBaseTransportHeader,
|
|
|
|
|
Offset: 2, // TODO
|
|
|
|
|
Len: 2, // TODO
|
|
|
|
|
},
|
|
|
|
|
// [ cmp gte reg 1 0x0000e60f ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpGte,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: binaryutil.BigEndian.PutUint16(4070),
|
|
|
|
|
},
|
|
|
|
|
// [ cmp lte reg 1 0x0000fa0f ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpLte,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: binaryutil.BigEndian.PutUint16(4090),
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ immediate reg 1 0x0217a8c0 ]
|
|
|
|
|
&expr.Immediate{
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: net.ParseIP("192.168.23.2").To4(),
|
|
|
|
|
},
|
|
|
|
|
// [ immediate reg 2 0x0000f00f ]
|
|
|
|
|
&expr.Immediate{
|
|
|
|
|
Register: 2,
|
|
|
|
|
Data: binaryutil.BigEndian.PutUint16(4070),
|
|
|
|
|
},
|
|
|
|
|
// [ immediate reg 3 0x0000fa0f ]
|
|
|
|
|
&expr.Immediate{
|
|
|
|
|
Register: 3,
|
|
|
|
|
Data: binaryutil.BigEndian.PutUint16(4090),
|
|
|
|
|
},
|
|
|
|
|
// [ nat dnat ip addr_min reg 1 addr_max reg 0 proto_min reg 2 proto_max reg 3 ]
|
|
|
|
|
&expr.NAT{
|
|
|
|
|
Type: expr.NATTypeDestNAT,
|
|
|
|
|
Family: unix.NFPROTO_IPV4,
|
|
|
|
|
RegAddrMin: 1,
|
|
|
|
|
RegProtoMin: 2,
|
|
|
|
|
RegProtoMax: 3,
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
})
|
|
|
|
|
|
2018-05-24 23:47:16 -05:00
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
}
|
2018-06-23 14:12:14 -05:00
|
|
|
|
2019-01-04 01:46:40 -06:00
|
|
|
func TestConfigureNATSourceAddress(t *testing.T) {
|
|
|
|
|
// The want byte sequences come from stracing nft(8), e.g.:
|
|
|
|
|
// strace -f -v -x -s 2048 -eraw=sendto nft add table ip nat
|
|
|
|
|
//
|
|
|
|
|
// The nft(8) command sequence was taken from:
|
|
|
|
|
// https://wiki.nftables.org/wiki-nftables/index.php/Performing_Network_Address_Translation_(NAT)
|
|
|
|
|
want := [][]byte{
|
|
|
|
|
// batch begin
|
|
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
|
|
|
|
// nft flush ruleset
|
|
|
|
|
[]byte("\x00\x00\x00\x00"),
|
|
|
|
|
// nft add table ip nat
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
|
|
|
|
|
// nft add chain nat postrouting '{' type nat hook postrouting priority 100 \; '}'
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x10\x00\x03\x00\x70\x6f\x73\x74\x72\x6f\x75\x74\x69\x6e\x67\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x04\x08\x00\x02\x00\x00\x00\x00\x64\x08\x00\x07\x00\x6e\x61\x74\x00"),
|
|
|
|
|
// nft add rule nat postrouting ip saddr 192.168.69.2 masquerade
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x10\x00\x02\x00\x70\x6f\x73\x74\x72\x6f\x75\x74\x69\x6e\x67\x00\x78\x00\x04\x80\x34\x00\x01\x80\x0c\x00\x01\x00\x70\x61\x79\x6c\x6f\x61\x64\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x01\x08\x00\x03\x00\x00\x00\x00\x0c\x08\x00\x04\x00\x00\x00\x00\x04\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0c\x00\x03\x80\x08\x00\x01\x00\xc0\xa8\x45\x02\x14\x00\x01\x80\x09\x00\x01\x00\x6d\x61\x73\x71\x00\x00\x00\x00\x04\x00\x02\x80"),
|
|
|
|
|
// batch end
|
|
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c := &nftables.Conn{
|
|
|
|
|
TestDial: func(req []netlink.Message) ([]netlink.Message, error) {
|
|
|
|
|
for idx, msg := range req {
|
|
|
|
|
b, err := msg.MarshalBinary()
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
if len(b) < 16 {
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
b = b[16:]
|
|
|
|
|
if len(want) == 0 {
|
|
|
|
|
t.Errorf("no want entry for message %d: %x", idx, b)
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
if got, want := b, want[0]; !bytes.Equal(got, want) {
|
|
|
|
|
t.Errorf("message %d: %s", idx, linediff(nfdump(got), nfdump(want)))
|
|
|
|
|
}
|
|
|
|
|
want = want[1:]
|
|
|
|
|
}
|
|
|
|
|
return req, nil
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c.FlushRuleset()
|
|
|
|
|
|
|
|
|
|
nat := c.AddTable(&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "nat",
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
postrouting := c.AddChain(&nftables.Chain{
|
|
|
|
|
Name: "postrouting",
|
|
|
|
|
Hooknum: nftables.ChainHookPostrouting,
|
|
|
|
|
Priority: nftables.ChainPriorityNATSource,
|
|
|
|
|
Table: nat,
|
|
|
|
|
Type: nftables.ChainTypeNAT,
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
c.AddRule(&nftables.Rule{
|
|
|
|
|
Table: nat,
|
|
|
|
|
Chain: postrouting,
|
|
|
|
|
Exprs: []expr.Any{
|
|
|
|
|
// payload load 4b @ network header + 12 => reg 1
|
|
|
|
|
&expr.Payload{
|
|
|
|
|
DestRegister: 1,
|
|
|
|
|
Base: expr.PayloadBaseNetworkHeader,
|
|
|
|
|
Offset: 12,
|
|
|
|
|
Len: 4,
|
|
|
|
|
},
|
|
|
|
|
// cmp eq reg 1 0x0245a8c0
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: net.ParseIP("192.168.69.2").To4(),
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// masq
|
|
|
|
|
&expr.Masq{},
|
|
|
|
|
},
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2018-06-23 14:12:14 -05:00
|
|
|
func TestGetRule(t *testing.T) {
|
|
|
|
|
// The want byte sequences come from stracing nft(8), e.g.:
|
|
|
|
|
// strace -f -v -x -s 2048 -eraw=sendto nft list chain ip filter forward
|
|
|
|
|
|
|
|
|
|
want := [][]byte{
|
|
|
|
|
[]byte{0x2, 0x0, 0x0, 0x0, 0xb, 0x0, 0x1, 0x0, 0x66, 0x69, 0x6c, 0x74, 0x65, 0x72, 0x0, 0x0, 0xa, 0x0, 0x2, 0x0, 0x69, 0x6e, 0x70, 0x75, 0x74, 0x0, 0x0, 0x0},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// The reply messages come from adding log.Printf("msgs: %#v", msgs) to
|
|
|
|
|
// (*github.com/mdlayher/netlink/Conn).receive
|
|
|
|
|
reply := [][]netlink.Message{
|
|
|
|
|
nil,
|
|
|
|
|
[]netlink.Message{netlink.Message{Header: netlink.Header{Length: 0x68, Type: 0xa06, Flags: 0x802, Sequence: 0x9acb0443, PID: 0xba38ef3c}, Data: []uint8{0x2, 0x0, 0x0, 0xc, 0xb, 0x0, 0x1, 0x0, 0x66, 0x69, 0x6c, 0x74, 0x65, 0x72, 0x0, 0x0, 0xc, 0x0, 0x2, 0x0, 0x66, 0x6f, 0x72, 0x77, 0x61, 0x72, 0x64, 0x0, 0xc, 0x0, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2, 0x30, 0x0, 0x4, 0x0, 0x2c, 0x0, 0x1, 0x0, 0xc, 0x0, 0x1, 0x0, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x65, 0x72, 0x0, 0x1c, 0x0, 0x2, 0x0, 0xc, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x6d, 0x92, 0x20, 0x20, 0xc, 0x0, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xa, 0x48, 0xd9}}},
|
|
|
|
|
[]netlink.Message{netlink.Message{Header: netlink.Header{Length: 0x14, Type: 0x3, Flags: 0x2, Sequence: 0x9acb0443, PID: 0xba38ef3c}, Data: []uint8{0x0, 0x0, 0x0, 0x0}}},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c := &nftables.Conn{
|
|
|
|
|
TestDial: func(req []netlink.Message) ([]netlink.Message, error) {
|
|
|
|
|
for idx, msg := range req {
|
|
|
|
|
b, err := msg.MarshalBinary()
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
if len(b) < 16 {
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
b = b[16:]
|
|
|
|
|
if len(want) == 0 {
|
|
|
|
|
t.Errorf("no want entry for message %d: %x", idx, b)
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
if got, want := b, want[0]; !bytes.Equal(got, want) {
|
2018-10-22 02:22:02 -05:00
|
|
|
t.Errorf("message %d: %s", idx, linediff(nfdump(got), nfdump(want)))
|
2018-06-23 14:12:14 -05:00
|
|
|
}
|
|
|
|
|
want = want[1:]
|
|
|
|
|
}
|
|
|
|
|
rep := reply[0]
|
|
|
|
|
reply = reply[1:]
|
|
|
|
|
return rep, nil
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
rules, err := c.GetRule(
|
|
|
|
|
&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "filter",
|
|
|
|
|
},
|
|
|
|
|
&nftables.Chain{
|
|
|
|
|
Name: "input",
|
|
|
|
|
},
|
|
|
|
|
)
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if got, want := len(rules), 1; got != want {
|
|
|
|
|
t.Fatalf("unexpected number of rules: got %d, want %d", got, want)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
rule := rules[0]
|
|
|
|
|
if got, want := len(rule.Exprs), 1; got != want {
|
|
|
|
|
t.Fatalf("unexpected number of exprs: got %d, want %d", got, want)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ce, ok := rule.Exprs[0].(*expr.Counter)
|
|
|
|
|
if !ok {
|
|
|
|
|
t.Fatalf("unexpected expression type: got %T, want *expr.Counter", rule.Exprs[0])
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if got, want := ce.Packets, uint64(674009); got != want {
|
|
|
|
|
t.Errorf("unexpected number of packets: got %d, want %d", got, want)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if got, want := ce.Bytes, uint64(1838293024); got != want {
|
|
|
|
|
t.Errorf("unexpected number of bytes: got %d, want %d", got, want)
|
|
|
|
|
}
|
|
|
|
|
}
|
2018-08-08 16:09:16 -05:00
|
|
|
|
|
|
|
|
func TestAddCounter(t *testing.T) {
|
|
|
|
|
// The want byte sequences come from stracing nft(8), e.g.:
|
|
|
|
|
// strace -f -v -x -s 2048 -eraw=sendto nft add table ip nat
|
|
|
|
|
//
|
|
|
|
|
// The nft(8) command sequence was taken from:
|
|
|
|
|
// https://wiki.nftables.org/wiki-nftables/index.php/Performing_Network_Address_Translation_(NAT)
|
|
|
|
|
want := [][]byte{
|
|
|
|
|
// batch begin
|
2018-10-05 10:58:05 -05:00
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
2018-08-08 16:09:16 -05:00
|
|
|
// nft add counter ip filter fwded
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x0a\x00\x02\x00\x66\x77\x64\x65\x64\x00\x00\x00\x08\x00\x03\x00\x00\x00\x00\x01\x1c\x00\x04\x80\x0c\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0c\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00"),
|
|
|
|
|
// nft add rule ip filter forward counter name fwded
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x0c\x00\x02\x00\x66\x6f\x72\x77\x61\x72\x64\x00\x2c\x00\x04\x80\x28\x00\x01\x80\x0b\x00\x01\x00\x6f\x62\x6a\x72\x65\x66\x00\x00\x18\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x09\x00\x02\x00\x66\x77\x64\x65\x64\x00\x00\x00"),
|
|
|
|
|
// batch end
|
2018-10-05 10:58:05 -05:00
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
2018-08-08 16:09:16 -05:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c := &nftables.Conn{
|
|
|
|
|
TestDial: func(req []netlink.Message) ([]netlink.Message, error) {
|
|
|
|
|
for idx, msg := range req {
|
|
|
|
|
b, err := msg.MarshalBinary()
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
if len(b) < 16 {
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
b = b[16:]
|
|
|
|
|
if len(want) == 0 {
|
|
|
|
|
t.Errorf("no want entry for message %d: %x", idx, b)
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
if got, want := b, want[0]; !bytes.Equal(got, want) {
|
2018-10-22 02:22:02 -05:00
|
|
|
t.Errorf("message %d: %s", idx, linediff(nfdump(got), nfdump(want)))
|
2018-08-08 16:09:16 -05:00
|
|
|
}
|
|
|
|
|
want = want[1:]
|
|
|
|
|
}
|
|
|
|
|
return req, nil
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c.AddObj(&nftables.CounterObj{
|
|
|
|
|
Table: &nftables.Table{Name: "filter", Family: nftables.TableFamilyIPv4},
|
|
|
|
|
Name: "fwded",
|
|
|
|
|
Bytes: 0,
|
|
|
|
|
Packets: 0,
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
c.AddRule(&nftables.Rule{
|
|
|
|
|
Table: &nftables.Table{Name: "filter", Family: nftables.TableFamilyIPv4},
|
|
|
|
|
Chain: &nftables.Chain{Name: "forward", Type: nftables.ChainTypeFilter},
|
|
|
|
|
Exprs: []expr.Any{
|
|
|
|
|
&expr.Objref{
|
|
|
|
|
Type: 1,
|
|
|
|
|
Name: "fwded",
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func TestGetObjReset(t *testing.T) {
|
|
|
|
|
// The want byte sequences come from stracing nft(8), e.g.:
|
|
|
|
|
// strace -f -v -x -s 2048 -eraw=sendto nft list chain ip filter forward
|
|
|
|
|
|
|
|
|
|
want := [][]byte{
|
|
|
|
|
[]byte{0x2, 0x0, 0x0, 0x0, 0xb, 0x0, 0x1, 0x0, 0x66, 0x69, 0x6c, 0x74, 0x65, 0x72, 0x0, 0x0, 0xa, 0x0, 0x2, 0x0, 0x66, 0x77, 0x64, 0x65, 0x64, 0x0, 0x0, 0x0, 0x8, 0x0, 0x3, 0x0, 0x0, 0x0, 0x0, 0x1},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// The reply messages come from adding log.Printf("msgs: %#v", msgs) to
|
|
|
|
|
// (*github.com/mdlayher/netlink/Conn).receive
|
|
|
|
|
reply := [][]netlink.Message{
|
|
|
|
|
nil,
|
|
|
|
|
[]netlink.Message{netlink.Message{Header: netlink.Header{Length: 0x64, Type: 0xa12, Flags: 0x802, Sequence: 0x9acb0443, PID: 0xde9}, Data: []uint8{0x2, 0x0, 0x0, 0x10, 0xb, 0x0, 0x1, 0x0, 0x66, 0x69, 0x6c, 0x74, 0x65, 0x72, 0x0, 0x0, 0xa, 0x0, 0x2, 0x0, 0x66, 0x77, 0x64, 0x65, 0x64, 0x0, 0x0, 0x0, 0x8, 0x0, 0x3, 0x0, 0x0, 0x0, 0x0, 0x1, 0x8, 0x0, 0x5, 0x0, 0x0, 0x0, 0x0, 0x1, 0x1c, 0x0, 0x4, 0x0, 0xc, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4, 0x61, 0xc, 0x0, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x9, 0xc, 0x0, 0x6, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2}}},
|
|
|
|
|
[]netlink.Message{netlink.Message{Header: netlink.Header{Length: 0x14, Type: 0x3, Flags: 0x2, Sequence: 0x9acb0443, PID: 0xde9}, Data: []uint8{0x0, 0x0, 0x0, 0x0}}},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c := &nftables.Conn{
|
|
|
|
|
TestDial: func(req []netlink.Message) ([]netlink.Message, error) {
|
|
|
|
|
for idx, msg := range req {
|
|
|
|
|
b, err := msg.MarshalBinary()
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
if len(b) < 16 {
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
b = b[16:]
|
|
|
|
|
if len(want) == 0 {
|
|
|
|
|
t.Errorf("no want entry for message %d: %x", idx, b)
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
if got, want := b, want[0]; !bytes.Equal(got, want) {
|
2018-10-22 02:22:02 -05:00
|
|
|
t.Errorf("message %d: %s", idx, linediff(nfdump(got), nfdump(want)))
|
2018-08-08 16:09:16 -05:00
|
|
|
}
|
|
|
|
|
want = want[1:]
|
|
|
|
|
}
|
|
|
|
|
rep := reply[0]
|
|
|
|
|
reply = reply[1:]
|
|
|
|
|
return rep, nil
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
|
2018-10-03 11:23:26 -05:00
|
|
|
filter := &nftables.Table{Name: "filter", Family: nftables.TableFamilyIPv4}
|
2018-08-08 16:09:16 -05:00
|
|
|
objs, err := c.GetObjReset(&nftables.CounterObj{
|
2018-10-03 11:23:26 -05:00
|
|
|
Table: filter,
|
2018-08-08 16:09:16 -05:00
|
|
|
Name: "fwded",
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if got, want := len(objs), 1; got != want {
|
|
|
|
|
t.Fatalf("unexpected number of rules: got %d, want %d", got, want)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
obj := objs[0]
|
|
|
|
|
co, ok := obj.(*nftables.CounterObj)
|
|
|
|
|
if !ok {
|
|
|
|
|
t.Fatalf("unexpected type: got %T, want *nftables.CounterObj", obj)
|
|
|
|
|
}
|
2018-10-03 11:23:26 -05:00
|
|
|
if got, want := co.Table.Name, filter.Name; got != want {
|
|
|
|
|
t.Errorf("unexpected table name: got %q, want %q", got, want)
|
|
|
|
|
}
|
|
|
|
|
if got, want := co.Table.Family, filter.Family; got != want {
|
|
|
|
|
t.Errorf("unexpected table family: got %d, want %d", got, want)
|
|
|
|
|
}
|
2018-08-08 16:09:16 -05:00
|
|
|
if got, want := co.Packets, uint64(9); got != want {
|
|
|
|
|
t.Errorf("unexpected number of packets: got %d, want %d", got, want)
|
|
|
|
|
}
|
|
|
|
|
if got, want := co.Bytes, uint64(1121); got != want {
|
|
|
|
|
t.Errorf("unexpected number of bytes: got %d, want %d", got, want)
|
|
|
|
|
}
|
|
|
|
|
}
|
2018-10-22 02:22:02 -05:00
|
|
|
|
|
|
|
|
func TestConfigureClamping(t *testing.T) {
|
|
|
|
|
// The want byte sequences come from stracing nft(8), e.g.:
|
|
|
|
|
// strace -f -v -x -s 2048 -eraw=sendto nft add table ip nat
|
|
|
|
|
//
|
|
|
|
|
// The nft(8) command sequence was taken from:
|
|
|
|
|
// https://wiki.nftables.org/wiki-nftables/index.php/Mangle_TCP_options
|
|
|
|
|
want := [][]byte{
|
|
|
|
|
// batch begin
|
|
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
|
|
|
|
// nft flush ruleset
|
|
|
|
|
[]byte("\x00\x00\x00\x00"),
|
|
|
|
|
// nft add table ip filter
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
|
|
|
|
|
// nft add chain filter forward '{' type filter hook forward priority 0 \; '}'
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x0c\x00\x03\x00\x66\x6f\x72\x77\x61\x72\x64\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x02\x08\x00\x02\x00\x00\x00\x00\x00\x0b\x00\x07\x00\x66\x69\x6c\x74\x65\x72\x00\x00"),
|
|
|
|
|
// nft add rule ip filter forward oifname uplink0 tcp flags syn tcp option maxseg size set rt mtu
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x0c\x00\x02\x00\x66\x6f\x72\x77\x61\x72\x64\x00\xf0\x01\x04\x80\x24\x00\x01\x80\x09\x00\x01\x00\x6d\x65\x74\x61\x00\x00\x00\x00\x14\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x07\x08\x00\x01\x00\x00\x00\x00\x01\x38\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x2c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x18\x00\x03\x80\x14\x00\x01\x00\x75\x70\x6c\x69\x6e\x6b\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x24\x00\x01\x80\x09\x00\x01\x00\x6d\x65\x74\x61\x00\x00\x00\x00\x14\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x10\x08\x00\x01\x00\x00\x00\x00\x01\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0c\x00\x03\x80\x05\x00\x01\x00\x06\x00\x00\x00\x34\x00\x01\x80\x0c\x00\x01\x00\x70\x61\x79\x6c\x6f\x61\x64\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x02\x08\x00\x03\x00\x00\x00\x00\x0d\x08\x00\x04\x00\x00\x00\x00\x01\x44\x00\x01\x80\x0c\x00\x01\x00\x62\x69\x74\x77\x69\x73\x65\x00\x34\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x01\x08\x00\x03\x00\x00\x00\x00\x01\x0c\x00\x04\x80\x05\x00\x01\x00\x02\x00\x00\x00\x0c\x00\x05\x80\x05\x00\x01\x00\x00\x00\x00\x00\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x01\x0c\x00\x03\x80\x05\x00\x01\x00\x00\x00\x00\x00\x20\x00\x01\x80\x07\x00\x01\x00\x72\x74\x00\x00\x14\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x03\x08\x00\x01\x00\x00\x00\x00\x01\x40\x00\x01\x80\x0e\x00\x01\x00\x62\x79\x74\x65\x6f\x72\x64\x65\x72\x00\x00\x00\x2c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x01\x08\x00\x03\x00\x00\x00\x00\x01\x08\x00\x04\x00\x00\x00\x00\x02\x08\x00\x05\x00\x00\x00\x00\x02\x3c\x00\x01\x80\x0b\x00\x01\x00\x65\x78\x74\x68\x64\x72\x00\x00\x2c\x00\x02\x80\x08\x00\x07\x00\x00\x00\x00\x01\x05\x00\x02\x00\x02\x00\x00\x00\x08\x00\x03\x00\x00\x00\x00\x02\x08\x00\x04\x00\x00\x00\x00\x02\x08\x00\x06\x00\x00\x00\x00\x01"),
|
|
|
|
|
// batch end
|
|
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c := &nftables.Conn{
|
|
|
|
|
TestDial: func(req []netlink.Message) ([]netlink.Message, error) {
|
|
|
|
|
for idx, msg := range req {
|
|
|
|
|
b, err := msg.MarshalBinary()
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
if len(b) < 16 {
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
b = b[16:]
|
|
|
|
|
if len(want) == 0 {
|
|
|
|
|
t.Errorf("no want entry for message %d: %x", idx, b)
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
if got, want := b, want[0]; !bytes.Equal(got, want) {
|
|
|
|
|
t.Errorf("message %d: %s", idx, linediff(nfdump(got), nfdump(want)))
|
|
|
|
|
}
|
|
|
|
|
want = want[1:]
|
|
|
|
|
}
|
|
|
|
|
return req, nil
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c.FlushRuleset()
|
|
|
|
|
|
|
|
|
|
filter := c.AddTable(&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "filter",
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
forward := c.AddChain(&nftables.Chain{
|
|
|
|
|
Name: "forward",
|
|
|
|
|
Table: filter,
|
|
|
|
|
Type: nftables.ChainTypeFilter,
|
|
|
|
|
Hooknum: nftables.ChainHookForward,
|
|
|
|
|
Priority: nftables.ChainPriorityFilter,
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
c.AddRule(&nftables.Rule{
|
|
|
|
|
Table: filter,
|
|
|
|
|
Chain: forward,
|
|
|
|
|
Exprs: []expr.Any{
|
|
|
|
|
// [ meta load oifname => reg 1 ]
|
|
|
|
|
&expr.Meta{Key: expr.MetaKeyOIFNAME, Register: 1},
|
|
|
|
|
// [ cmp eq reg 1 0x30707070 0x00000000 0x00000000 0x00000000 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: ifname("uplink0"),
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ meta load l4proto => reg 1 ]
|
|
|
|
|
&expr.Meta{Key: expr.MetaKeyL4PROTO, Register: 1},
|
|
|
|
|
// [ cmp eq reg 1 0x00000006 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: []byte{unix.IPPROTO_TCP},
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ payload load 1b @ transport header + 13 => reg 1 ]
|
|
|
|
|
&expr.Payload{
|
|
|
|
|
DestRegister: 1,
|
|
|
|
|
Base: expr.PayloadBaseTransportHeader,
|
|
|
|
|
Offset: 13, // TODO
|
|
|
|
|
Len: 1, // TODO
|
|
|
|
|
},
|
|
|
|
|
// [ bitwise reg 1 = (reg=1 & 0x00000002 ) ^ 0x00000000 ]
|
|
|
|
|
&expr.Bitwise{
|
|
|
|
|
DestRegister: 1,
|
|
|
|
|
SourceRegister: 1,
|
|
|
|
|
Len: 1,
|
|
|
|
|
Mask: []byte{0x02},
|
|
|
|
|
Xor: []byte{0x00},
|
|
|
|
|
},
|
|
|
|
|
// [ cmp neq reg 1 0x00000000 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpNeq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: []byte{0x00},
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ rt load tcpmss => reg 1 ]
|
|
|
|
|
&expr.Rt{
|
|
|
|
|
Register: 1,
|
|
|
|
|
Key: expr.RtTCPMSS,
|
|
|
|
|
},
|
|
|
|
|
// [ byteorder reg 1 = hton(reg 1, 2, 2) ]
|
|
|
|
|
&expr.Byteorder{
|
|
|
|
|
DestRegister: 1,
|
|
|
|
|
SourceRegister: 1,
|
|
|
|
|
Op: expr.ByteorderHton,
|
|
|
|
|
Len: 2,
|
|
|
|
|
Size: 2,
|
|
|
|
|
},
|
|
|
|
|
// [ exthdr write tcpopt reg 1 => 2b @ 2 + 2 ]
|
|
|
|
|
&expr.Exthdr{
|
|
|
|
|
SourceRegister: 1,
|
|
|
|
|
Type: 2, // TODO
|
|
|
|
|
Offset: 2,
|
|
|
|
|
Len: 2,
|
|
|
|
|
Op: expr.ExthdrOpTcpopt,
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
}
|
2019-01-13 19:27:06 -06:00
|
|
|
|
|
|
|
|
func TestDropVerdict(t *testing.T) {
|
|
|
|
|
// The want byte sequences come from stracing nft(8), e.g.:
|
|
|
|
|
// strace -f -v -x -s 2048 -eraw=sendto nft add table ip nat
|
|
|
|
|
//
|
|
|
|
|
// The nft(8) command sequence was taken from:
|
|
|
|
|
// https://wiki.nftables.org/wiki-nftables/index.php/Mangle_TCP_options
|
|
|
|
|
want := [][]byte{
|
|
|
|
|
// batch begin
|
|
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
|
|
|
|
// nft flush ruleset
|
|
|
|
|
[]byte("\x00\x00\x00\x00"),
|
|
|
|
|
// nft add table ip filter
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
|
|
|
|
|
// nft add chain filter forward '{' type filter hook forward priority 0 \; '}'
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x0c\x00\x03\x00\x66\x6f\x72\x77\x61\x72\x64\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x02\x08\x00\x02\x00\x00\x00\x00\x00\x0b\x00\x07\x00\x66\x69\x6c\x74\x65\x72\x00\x00"),
|
|
|
|
|
// nft add rule filter forward tcp dport 1234 drop
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x0c\x00\x02\x00\x66\x6f\x72\x77\x61\x72\x64\x00\xe4\x00\x04\x80\x24\x00\x01\x80\x09\x00\x01\x00\x6d\x65\x74\x61\x00\x00\x00\x00\x14\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x10\x08\x00\x01\x00\x00\x00\x00\x01\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0c\x00\x03\x80\x05\x00\x01\x00\x06\x00\x00\x00\x34\x00\x01\x80\x0c\x00\x01\x00\x70\x61\x79\x6c\x6f\x61\x64\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x02\x08\x00\x03\x00\x00\x00\x00\x02\x08\x00\x04\x00\x00\x00\x00\x02\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0c\x00\x03\x80\x06\x00\x01\x00\x04\xd2\x00\x00\x30\x00\x01\x80\x0e\x00\x01\x00\x69\x6d\x6d\x65\x64\x69\x61\x74\x65\x00\x00\x00\x1c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x00\x10\x00\x02\x80\x0c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x00"),
|
|
|
|
|
// batch end
|
|
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c := &nftables.Conn{
|
|
|
|
|
TestDial: func(req []netlink.Message) ([]netlink.Message, error) {
|
|
|
|
|
for idx, msg := range req {
|
|
|
|
|
b, err := msg.MarshalBinary()
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
if len(b) < 16 {
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
b = b[16:]
|
|
|
|
|
if len(want) == 0 {
|
|
|
|
|
t.Errorf("no want entry for message %d: %x", idx, b)
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
if got, want := b, want[0]; !bytes.Equal(got, want) {
|
|
|
|
|
t.Errorf("message %d: %s", idx, linediff(nfdump(got), nfdump(want)))
|
|
|
|
|
}
|
|
|
|
|
want = want[1:]
|
|
|
|
|
}
|
|
|
|
|
return req, nil
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c.FlushRuleset()
|
|
|
|
|
|
|
|
|
|
filter := c.AddTable(&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "filter",
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
forward := c.AddChain(&nftables.Chain{
|
|
|
|
|
Name: "forward",
|
|
|
|
|
Table: filter,
|
|
|
|
|
Type: nftables.ChainTypeFilter,
|
|
|
|
|
Hooknum: nftables.ChainHookForward,
|
|
|
|
|
Priority: nftables.ChainPriorityFilter,
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
c.AddRule(&nftables.Rule{
|
|
|
|
|
Table: filter,
|
|
|
|
|
Chain: forward,
|
|
|
|
|
Exprs: []expr.Any{
|
|
|
|
|
// [ meta load l4proto => reg 1 ]
|
|
|
|
|
&expr.Meta{Key: expr.MetaKeyL4PROTO, Register: 1},
|
|
|
|
|
// [ cmp eq reg 1 0x00000006 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: []byte{unix.IPPROTO_TCP},
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ payload load 2b @ transport header + 2 => reg 1 ]
|
|
|
|
|
&expr.Payload{
|
|
|
|
|
DestRegister: 1,
|
|
|
|
|
Base: expr.PayloadBaseTransportHeader,
|
|
|
|
|
Offset: 2,
|
|
|
|
|
Len: 2,
|
|
|
|
|
},
|
|
|
|
|
// [ cmp eq reg 1 0x0000d204 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: []byte{0x04, 0xd2},
|
|
|
|
|
},
|
|
|
|
|
// [ immediate reg 0 drop ]
|
|
|
|
|
&expr.Verdict{
|
|
|
|
|
Kind: expr.VerdictDrop,
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
}
|
2019-01-28 22:56:40 -06:00
|
|
|
|
|
|
|
|
func TestCreateUseAnonymousSet(t *testing.T) {
|
|
|
|
|
// The want byte sequences come from stracing nft(8), e.g.:
|
|
|
|
|
// strace -f -v -x -s 2048 -eraw=sendto nft add table ip nat
|
|
|
|
|
//
|
|
|
|
|
// The nft(8) command sequence was taken from:
|
|
|
|
|
// https://wiki.nftables.org/wiki-nftables/index.php/Mangle_TCP_options
|
|
|
|
|
want := [][]byte{
|
|
|
|
|
// batch begin
|
|
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
|
|
|
|
// nft flush ruleset
|
|
|
|
|
[]byte("\x00\x00\x00\x00"),
|
|
|
|
|
// nft add table ip filter
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
|
|
|
|
|
// Create anonymous set with key len of 2 bytes and data len of 0 bytes
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x0c\x00\x02\x00\x5f\x5f\x73\x65\x74\x25\x64\x00\x08\x00\x03\x00\x00\x00\x00\x03\x08\x00\x04\x00\x00\x00\x00\x0d\x08\x00\x05\x00\x00\x00\x00\x02\x08\x00\x0a\x00\x00\x00\x00\x01\x0c\x00\x09\x80\x08\x00\x01\x00\x00\x00\x00\x02\x0a\x00\x0d\x00\x00\x04\x02\x00\x00\x00\x00\x00"),
|
|
|
|
|
// Assign the two values to the aforementioned anonymous set
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0c\x00\x02\x00\x5f\x5f\x73\x65\x74\x25\x64\x00\x08\x00\x04\x00\x00\x00\x00\x01\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x24\x00\x03\x80\x10\x00\x01\x80\x0c\x00\x01\x80\x06\x00\x01\x00\x00\x45\x00\x00\x10\x00\x02\x80\x0c\x00\x01\x80\x06\x00\x01\x00\x04\x8b\x00\x00"),
|
|
|
|
|
// nft add rule filter forward tcp dport {69, 1163} drop
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x0b\x00\x01\x00\x66\x69\x6c\x74\x65\x72\x00\x00\x0c\x00\x02\x00\x66\x6f\x72\x77\x61\x72\x64\x00\xe8\x00\x04\x80\x24\x00\x01\x80\x09\x00\x01\x00\x6d\x65\x74\x61\x00\x00\x00\x00\x14\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x10\x08\x00\x01\x00\x00\x00\x00\x01\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0c\x00\x03\x80\x05\x00\x01\x00\x06\x00\x00\x00\x34\x00\x01\x80\x0c\x00\x01\x00\x70\x61\x79\x6c\x6f\x61\x64\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x02\x08\x00\x03\x00\x00\x00\x00\x02\x08\x00\x04\x00\x00\x00\x00\x02\x30\x00\x01\x80\x0b\x00\x01\x00\x6c\x6f\x6f\x6b\x75\x70\x00\x00\x20\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x01\x0c\x00\x01\x00\x5f\x5f\x73\x65\x74\x25\x64\x00\x08\x00\x04\x00\x00\x00\x00\x01\x30\x00\x01\x80\x0e\x00\x01\x00\x69\x6d\x6d\x65\x64\x69\x61\x74\x65\x00\x00\x00\x1c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x00\x10\x00\x02\x80\x0c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x00"),
|
|
|
|
|
// batch end
|
|
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c := &nftables.Conn{
|
|
|
|
|
TestDial: func(req []netlink.Message) ([]netlink.Message, error) {
|
|
|
|
|
for idx, msg := range req {
|
|
|
|
|
b, err := msg.MarshalBinary()
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
if len(b) < 16 {
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
b = b[16:]
|
|
|
|
|
if len(want) == 0 {
|
|
|
|
|
t.Errorf("no want entry for message %d: %x", idx, b)
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
if got, want := b, want[0]; !bytes.Equal(got, want) {
|
|
|
|
|
t.Errorf("message %d: %s", idx, linediff(nfdump(got), nfdump(want)))
|
|
|
|
|
}
|
|
|
|
|
want = want[1:]
|
|
|
|
|
}
|
|
|
|
|
return req, nil
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c.FlushRuleset()
|
|
|
|
|
|
|
|
|
|
filter := c.AddTable(&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "filter",
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
set := &nftables.Set{
|
|
|
|
|
Anonymous: true,
|
|
|
|
|
Constant: true,
|
|
|
|
|
Table: filter,
|
|
|
|
|
KeyType: nftables.TypeInetService,
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if err := c.AddSet(set, []nftables.SetElement{
|
|
|
|
|
{Key: binaryutil.BigEndian.PutUint16(69)},
|
|
|
|
|
{Key: binaryutil.BigEndian.PutUint16(1163)},
|
|
|
|
|
}); err != nil {
|
|
|
|
|
t.Errorf("c.AddSet() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c.AddRule(&nftables.Rule{
|
|
|
|
|
Table: filter,
|
|
|
|
|
Chain: &nftables.Chain{Name: "forward", Type: nftables.ChainTypeFilter},
|
|
|
|
|
Exprs: []expr.Any{
|
|
|
|
|
// [ meta load l4proto => reg 1 ]
|
|
|
|
|
&expr.Meta{Key: expr.MetaKeyL4PROTO, Register: 1},
|
|
|
|
|
// [ cmp eq reg 1 0x00000006 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: []byte{unix.IPPROTO_TCP},
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ payload load 2b @ transport header + 2 => reg 1 ]
|
|
|
|
|
&expr.Payload{
|
|
|
|
|
DestRegister: 1,
|
|
|
|
|
Base: expr.PayloadBaseTransportHeader,
|
|
|
|
|
Offset: 2,
|
|
|
|
|
Len: 2,
|
|
|
|
|
},
|
|
|
|
|
// [ lookup reg 1 set __set%d ]
|
|
|
|
|
&expr.Lookup{
|
|
|
|
|
SourceRegister: 1,
|
|
|
|
|
SetName: set.Name,
|
|
|
|
|
SetID: set.ID,
|
|
|
|
|
},
|
|
|
|
|
// [ immediate reg 0 drop ]
|
|
|
|
|
&expr.Verdict{
|
|
|
|
|
Kind: expr.VerdictDrop,
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func TestCreateUseNamedSet(t *testing.T) {
|
|
|
|
|
// Create a new network namespace to test these operations,
|
|
|
|
|
// and tear down the namespace at test completion.
|
|
|
|
|
c, newNS := openSystemNFTConn(t)
|
|
|
|
|
defer cleanupSystemNFTConn(t, newNS)
|
|
|
|
|
// Clear all rules at the beginning + end of the test.
|
|
|
|
|
c.FlushRuleset()
|
|
|
|
|
defer c.FlushRuleset()
|
|
|
|
|
|
|
|
|
|
filter := c.AddTable(&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "filter",
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
portSet := &nftables.Set{
|
|
|
|
|
Table: filter,
|
|
|
|
|
Name: "kek",
|
|
|
|
|
KeyType: nftables.TypeInetService,
|
|
|
|
|
}
|
|
|
|
|
if err := c.AddSet(portSet, nil); err != nil {
|
|
|
|
|
t.Errorf("c.AddSet(portSet) failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
if err := c.SetAddElements(portSet, []nftables.SetElement{{Key: binaryutil.BigEndian.PutUint16(22)}}); err != nil {
|
|
|
|
|
t.Errorf("c.SetVal(portSet) failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ipSet := &nftables.Set{
|
|
|
|
|
Table: filter,
|
|
|
|
|
Name: "IPs_4_dayz",
|
|
|
|
|
KeyType: nftables.TypeIPAddr,
|
|
|
|
|
}
|
|
|
|
|
if err := c.AddSet(ipSet, []nftables.SetElement{{Key: []byte(net.ParseIP("192.168.1.64").To4())}}); err != nil {
|
|
|
|
|
t.Errorf("c.AddSet(ipSet) failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
if err := c.SetAddElements(ipSet, []nftables.SetElement{{Key: []byte(net.ParseIP("192.168.1.42").To4())}}); err != nil {
|
|
|
|
|
t.Errorf("c.SetVal(ipSet) failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Errorf("c.Flush() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
sets, err := c.GetSets(filter)
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Errorf("c.GetSets() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
if len(sets) != 2 {
|
|
|
|
|
t.Fatalf("len(sets) = %d, want 2", len(sets))
|
|
|
|
|
}
|
|
|
|
|
if sets[0].Name != "kek" {
|
|
|
|
|
t.Errorf("set[0].Name = %q, want kek", sets[0].Name)
|
|
|
|
|
}
|
|
|
|
|
if sets[1].Name != "IPs_4_dayz" {
|
|
|
|
|
t.Errorf("set[1].Name = %q, want IPs_4_dayz", sets[1].Name)
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func TestCreateDeleteNamedSet(t *testing.T) {
|
|
|
|
|
// Create a new network namespace to test these operations,
|
|
|
|
|
// and tear down the namespace at test completion.
|
|
|
|
|
c, newNS := openSystemNFTConn(t)
|
|
|
|
|
defer cleanupSystemNFTConn(t, newNS)
|
|
|
|
|
// Clear all rules at the beginning + end of the test.
|
|
|
|
|
c.FlushRuleset()
|
|
|
|
|
defer c.FlushRuleset()
|
|
|
|
|
|
|
|
|
|
filter := c.AddTable(&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "filter",
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
portSet := &nftables.Set{
|
|
|
|
|
Table: filter,
|
|
|
|
|
Name: "kek",
|
|
|
|
|
KeyType: nftables.TypeInetService,
|
|
|
|
|
}
|
|
|
|
|
if err := c.AddSet(portSet, nil); err != nil {
|
|
|
|
|
t.Errorf("c.AddSet(portSet) failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Errorf("c.Flush() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c.DelSet(portSet)
|
|
|
|
|
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Errorf("Second c.Flush() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
sets, err := c.GetSets(filter)
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Errorf("c.GetSets() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
if len(sets) != 0 {
|
|
|
|
|
t.Fatalf("len(sets) = %d, want 0", len(sets))
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func TestDeleteElementNamedSet(t *testing.T) {
|
|
|
|
|
// Create a new network namespace to test these operations,
|
|
|
|
|
// and tear down the namespace at test completion.
|
|
|
|
|
c, newNS := openSystemNFTConn(t)
|
|
|
|
|
defer cleanupSystemNFTConn(t, newNS)
|
|
|
|
|
// Clear all rules at the beginning + end of the test.
|
|
|
|
|
c.FlushRuleset()
|
|
|
|
|
defer c.FlushRuleset()
|
|
|
|
|
|
|
|
|
|
filter := c.AddTable(&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "filter",
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
portSet := &nftables.Set{
|
|
|
|
|
Table: filter,
|
|
|
|
|
Name: "kek",
|
|
|
|
|
KeyType: nftables.TypeInetService,
|
|
|
|
|
}
|
|
|
|
|
if err := c.AddSet(portSet, []nftables.SetElement{{Key: []byte{0, 22}}, {Key: []byte{0, 23}}}); err != nil {
|
|
|
|
|
t.Errorf("c.AddSet(portSet) failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Errorf("c.Flush() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c.SetDeleteElements(portSet, []nftables.SetElement{{Key: []byte{0, 23}}})
|
|
|
|
|
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Errorf("Second c.Flush() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
elems, err := c.GetSetElements(portSet)
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Errorf("c.GetSets() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
if len(elems) != 1 {
|
|
|
|
|
t.Fatalf("len(elems) = %d, want 1", len(elems))
|
|
|
|
|
}
|
|
|
|
|
if !bytes.Equal(elems[0].Key, []byte{0, 22}) {
|
|
|
|
|
t.Errorf("elems[0].Key = %v, want 22", elems[0].Key)
|
|
|
|
|
}
|
|
|
|
|
}
|
2019-02-18 06:01:32 -06:00
|
|
|
|
|
|
|
|
func TestGetRuleLookupVerdictImmediate(t *testing.T) {
|
|
|
|
|
// Create a new network namespace to test these operations,
|
|
|
|
|
// and tear down the namespace at test completion.
|
|
|
|
|
c, newNS := openSystemNFTConn(t)
|
|
|
|
|
defer cleanupSystemNFTConn(t, newNS)
|
|
|
|
|
// Clear all rules at the beginning + end of the test.
|
|
|
|
|
c.FlushRuleset()
|
|
|
|
|
defer c.FlushRuleset()
|
|
|
|
|
|
|
|
|
|
filter := c.AddTable(&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "filter",
|
|
|
|
|
})
|
|
|
|
|
forward := c.AddChain(&nftables.Chain{
|
|
|
|
|
Name: "forward",
|
|
|
|
|
Table: filter,
|
|
|
|
|
Type: nftables.ChainTypeFilter,
|
|
|
|
|
Hooknum: nftables.ChainHookForward,
|
|
|
|
|
Priority: nftables.ChainPriorityFilter,
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
set := &nftables.Set{
|
|
|
|
|
Table: filter,
|
|
|
|
|
Name: "kek",
|
|
|
|
|
KeyType: nftables.TypeInetService,
|
|
|
|
|
}
|
|
|
|
|
if err := c.AddSet(set, nil); err != nil {
|
|
|
|
|
t.Errorf("c.AddSet(portSet) failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Errorf("c.Flush() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c.AddRule(&nftables.Rule{
|
|
|
|
|
Table: filter,
|
|
|
|
|
Chain: forward,
|
|
|
|
|
Exprs: []expr.Any{
|
|
|
|
|
// [ meta load l4proto => reg 1 ]
|
|
|
|
|
&expr.Meta{Key: expr.MetaKeyL4PROTO, Register: 1},
|
|
|
|
|
// [ cmp eq reg 1 0x00000006 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: []byte{unix.IPPROTO_TCP},
|
|
|
|
|
},
|
|
|
|
|
// [ payload load 2b @ transport header + 2 => reg 1 ]
|
|
|
|
|
&expr.Payload{
|
|
|
|
|
DestRegister: 1,
|
|
|
|
|
Base: expr.PayloadBaseTransportHeader,
|
|
|
|
|
Offset: 2,
|
|
|
|
|
Len: 2,
|
|
|
|
|
},
|
|
|
|
|
// [ lookup reg 1 set __set%d ]
|
|
|
|
|
&expr.Lookup{
|
|
|
|
|
SourceRegister: 1,
|
|
|
|
|
SetName: set.Name,
|
|
|
|
|
SetID: set.ID,
|
|
|
|
|
},
|
|
|
|
|
// [ immediate reg 0 drop ]
|
|
|
|
|
&expr.Verdict{
|
|
|
|
|
Kind: expr.VerdictAccept,
|
|
|
|
|
},
|
|
|
|
|
// [ immediate reg 2 kek ]
|
|
|
|
|
&expr.Immediate{
|
|
|
|
|
Register: 2,
|
|
|
|
|
Data: []byte("kek"),
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Errorf("c.Flush() failed: %v", err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
rules, err := c.GetRule(
|
|
|
|
|
&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "filter",
|
|
|
|
|
},
|
|
|
|
|
&nftables.Chain{
|
|
|
|
|
Name: "forward",
|
|
|
|
|
},
|
|
|
|
|
)
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if got, want := len(rules), 1; got != want {
|
|
|
|
|
t.Fatalf("unexpected number of rules: got %d, want %d", got, want)
|
|
|
|
|
}
|
|
|
|
|
if got, want := len(rules[0].Exprs), 6; got != want {
|
|
|
|
|
t.Fatalf("unexpected number of exprs: got %d, want %d", got, want)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
lookup, lookupOk := rules[0].Exprs[3].(*expr.Lookup)
|
|
|
|
|
if !lookupOk {
|
|
|
|
|
t.Fatalf("Exprs[3] is type %T, want *expr.Lookup", rules[0].Exprs[3])
|
|
|
|
|
}
|
|
|
|
|
if want := (&expr.Lookup{
|
|
|
|
|
SourceRegister: 1,
|
|
|
|
|
SetName: set.Name,
|
|
|
|
|
}); !reflect.DeepEqual(lookup, want) {
|
|
|
|
|
t.Errorf("lookup expr = %+v, wanted %+v", lookup, want)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
verdict, verdictOk := rules[0].Exprs[4].(*expr.Verdict)
|
|
|
|
|
if !verdictOk {
|
|
|
|
|
t.Fatalf("Exprs[4] is type %T, want *expr.Verdict", rules[0].Exprs[4])
|
|
|
|
|
}
|
|
|
|
|
if want := (&expr.Verdict{
|
|
|
|
|
Kind: expr.VerdictAccept,
|
|
|
|
|
}); !reflect.DeepEqual(verdict, want) {
|
|
|
|
|
t.Errorf("verdict expr = %+v, wanted %+v", verdict, want)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
imm, immOk := rules[0].Exprs[5].(*expr.Immediate)
|
|
|
|
|
if !immOk {
|
|
|
|
|
t.Fatalf("Exprs[4] is type %T, want *expr.Immediate", rules[0].Exprs[5])
|
|
|
|
|
}
|
|
|
|
|
if want := (&expr.Immediate{
|
|
|
|
|
Register: 2,
|
|
|
|
|
Data: []byte("kek"),
|
|
|
|
|
}); !reflect.DeepEqual(imm, want) {
|
|
|
|
|
t.Errorf("verdict expr = %+v, wanted %+v", imm, want)
|
|
|
|
|
}
|
|
|
|
|
}
|
2019-05-17 06:57:31 -05:00
|
|
|
|
|
|
|
|
func TestConfigureNATRedirect(t *testing.T) {
|
|
|
|
|
// The want byte sequences come from stracing nft(8), e.g.:
|
|
|
|
|
// strace -f -v -x -s 2048 -eraw=sendto nft add table ip nat
|
|
|
|
|
//
|
|
|
|
|
// The nft(8) command sequence was taken from:
|
|
|
|
|
// https://wiki.nftables.org/wiki-nftables/index.php/Performing_Network_Address_Translation_(NAT)
|
|
|
|
|
want := [][]byte{
|
|
|
|
|
// batch begin
|
|
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
|
|
|
|
// nft flush ruleset
|
|
|
|
|
[]byte("\x00\x00\x00\x00"),
|
|
|
|
|
// nft add table ip nat
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
|
|
|
|
|
// nft add chain nat prerouting '{' type nat hook prerouting priority 0 \; '}'
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x0f\x00\x03\x00\x70\x72\x65\x72\x6f\x75\x74\x69\x6e\x67\x00\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00\x08\x00\x07\x00\x6e\x61\x74\x00"),
|
|
|
|
|
// nft add rule nat prerouting tcp dport 22 redirect to 2222
|
|
|
|
|
[]byte("\x02\x00\x00\x00\x08\x00\x01\x00\x6e\x61\x74\x00\x0f\x00\x02\x00\x70\x72\x65\x72\x6f\x75\x74\x69\x6e\x67\x00\x00\xfc\x00\x04\x80\x24\x00\x01\x80\x09\x00\x01\x00\x6d\x65\x74\x61\x00\x00\x00\x00\x14\x00\x02\x80\x08\x00\x02\x00\x00\x00\x00\x10\x08\x00\x01\x00\x00\x00\x00\x01\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0c\x00\x03\x80\x05\x00\x01\x00\x06\x00\x00\x00\x34\x00\x01\x80\x0c\x00\x01\x00\x70\x61\x79\x6c\x6f\x61\x64\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x02\x08\x00\x03\x00\x00\x00\x00\x02\x08\x00\x04\x00\x00\x00\x00\x02\x2c\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x20\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0c\x00\x03\x80\x06\x00\x01\x00\x00\x16\x00\x00\x2c\x00\x01\x80\x0e\x00\x01\x00\x69\x6d\x6d\x65\x64\x69\x61\x74\x65\x00\x00\x00\x18\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x0c\x00\x02\x80\x06\x00\x01\x00\x08\xae\x00\x00\x1c\x00\x01\x80\x0a\x00\x01\x00\x72\x65\x64\x69\x72\x00\x00\x00\x0c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01"),
|
|
|
|
|
// batch end
|
|
|
|
|
[]byte("\x00\x00\x00\x0a"),
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c := &nftables.Conn{
|
|
|
|
|
TestDial: func(req []netlink.Message) ([]netlink.Message, error) {
|
|
|
|
|
for idx, msg := range req {
|
|
|
|
|
b, err := msg.MarshalBinary()
|
|
|
|
|
if err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
if len(b) < 16 {
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
b = b[16:]
|
|
|
|
|
if len(want) == 0 {
|
|
|
|
|
t.Errorf("no want entry for message %d: %x", idx, b)
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
if got, want := b, want[0]; !bytes.Equal(got, want) {
|
|
|
|
|
t.Errorf("message %d: %s", idx, linediff(nfdump(got), nfdump(want)))
|
|
|
|
|
}
|
|
|
|
|
want = want[1:]
|
|
|
|
|
}
|
|
|
|
|
return req, nil
|
|
|
|
|
},
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
c.FlushRuleset()
|
|
|
|
|
|
|
|
|
|
nat := c.AddTable(&nftables.Table{
|
|
|
|
|
Family: nftables.TableFamilyIPv4,
|
|
|
|
|
Name: "nat",
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
prerouting := c.AddChain(&nftables.Chain{
|
|
|
|
|
Name: "prerouting",
|
|
|
|
|
Hooknum: nftables.ChainHookPrerouting,
|
|
|
|
|
Priority: nftables.ChainPriorityFilter,
|
|
|
|
|
Table: nat,
|
|
|
|
|
Type: nftables.ChainTypeNAT,
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
c.AddRule(&nftables.Rule{
|
|
|
|
|
Table: nat,
|
|
|
|
|
Chain: prerouting,
|
|
|
|
|
Exprs: []expr.Any{
|
|
|
|
|
// [ meta load l4proto => reg 1 ]
|
|
|
|
|
&expr.Meta{Key: expr.MetaKeyL4PROTO, Register: 1},
|
|
|
|
|
// [ cmp eq reg 1 0x00000006 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: []byte{unix.IPPROTO_TCP},
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ payload load 2b @ transport header + 2 => reg 1 ]
|
|
|
|
|
&expr.Payload{
|
|
|
|
|
DestRegister: 1,
|
|
|
|
|
Base: expr.PayloadBaseTransportHeader,
|
|
|
|
|
Offset: 2, // TODO
|
|
|
|
|
Len: 2, // TODO
|
|
|
|
|
},
|
|
|
|
|
// [ cmp eq reg 1 0x00001600 ]
|
|
|
|
|
&expr.Cmp{
|
|
|
|
|
Op: expr.CmpOpEq,
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: []byte{0x00, 0x16},
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ immediate reg 1 0x0000ae08 ]
|
|
|
|
|
&expr.Immediate{
|
|
|
|
|
Register: 1,
|
|
|
|
|
Data: binaryutil.BigEndian.PutUint16(2222),
|
|
|
|
|
},
|
|
|
|
|
|
|
|
|
|
// [ redir proto_min reg 1 ]
|
|
|
|
|
&expr.Redir{
|
|
|
|
|
RegisterProtoMin: 1,
|
|
|
|
|
},
|
|
|
|
|
},
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
if err := c.Flush(); err != nil {
|
|
|
|
|
t.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
}
|
