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tailscale/util/linuxfw/nftables_runner_test.go

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util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
//go:build linux
package linuxfw
import (
"bytes"
util/linuxfw: move detection logic Just a refactor to consolidate the firewall detection logic in a single package so that it can be reused in a later commit by containerboot. Updates #9310 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-11 01:26:52 +00:00
"errors"
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
"fmt"
"net/netip"
"os"
"runtime"
"strings"
"testing"
"github.com/google/nftables"
"github.com/google/nftables/expr"
"github.com/mdlayher/netlink"
"github.com/vishvananda/netns"
"tailscale.com/net/tsaddr"
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
"tailscale.com/tstest"
"tailscale.com/types/logger"
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
)
// 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()
}
func TestMaskof(t *testing.T) {
pfx, err := netip.ParsePrefix("192.168.1.0/24")
if err != nil {
t.Fatal(err)
}
want := []byte{0xff, 0xff, 0xff, 0x00}
if got := maskof(pfx); !bytes.Equal(got, want) {
t.Errorf("got %v; want %v", got, want)
}
}
// 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()
}
func newTestConn(t *testing.T, want [][]byte) *nftables.Conn {
conn, err := nftables.New(nftables.WithTestDial(
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
}))
if err != nil {
t.Fatal(err)
}
return conn
}
util/linuxfw: reorganize nftables rules to allow it to work with ufw This commit tries to mimic the way iptables-nft work with the filewall rules. We follow the convention of using tables like filter, nat and the conventional chains, to make our nftables implementation work with ufw. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-08-18 18:41:28 +00:00
func TestInsertHookRule(t *testing.T) {
proto := nftables.TableFamilyIPv4
want := [][]byte{
// batch begin
[]byte("\x00\x00\x00\x0a"),
// nft add table ip ts-filter-test
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
// nft add chain ip ts-filter-test ts-input-test { type filter hook input priority 0 \; }
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x03\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0b\x00\x07\x00\x66\x69\x6c\x74\x65\x72\x00\x00"),
// nft add chain ip ts-filter-test ts-jumpto
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x0e\x00\x03\x00\x74\x73\x2d\x6a\x75\x6d\x70\x74\x6f\x00\x00\x00"),
// nft add rule ip ts-filter-test ts-input-test counter jump ts-jumptp
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x02\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\x70\x00\x04\x80\x2c\x00\x01\x80\x0c\x00\x01\x00\x63\x6f\x75\x6e\x74\x65\x72\x00\x1c\x00\x02\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\x40\x00\x01\x80\x0e\x00\x01\x00\x69\x6d\x6d\x65\x64\x69\x61\x74\x65\x00\x00\x00\x2c\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x00\x20\x00\x02\x80\x1c\x00\x02\x80\x08\x00\x01\x00\xff\xff\xff\xfd\x0e\x00\x02\x00\x74\x73\x2d\x6a\x75\x6d\x70\x74\x6f\x00\x00\x00"),
// batch end
[]byte("\x00\x00\x00\x0a"),
}
testConn := newTestConn(t, want)
table := testConn.AddTable(&nftables.Table{
Family: proto,
Name: "ts-filter-test",
})
fromchain := testConn.AddChain(&nftables.Chain{
Name: "ts-input-test",
Table: table,
Type: nftables.ChainTypeFilter,
Hooknum: nftables.ChainHookInput,
Priority: nftables.ChainPriorityFilter,
})
tochain := testConn.AddChain(&nftables.Chain{
Name: "ts-jumpto",
Table: table,
})
err := addHookRule(testConn, table, fromchain, tochain.Name)
if err != nil {
t.Fatal(err)
}
}
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
func TestInsertLoopbackRule(t *testing.T) {
proto := nftables.TableFamilyIPv4
want := [][]byte{
// batch begin
[]byte("\x00\x00\x00\x0a"),
// nft add table ip ts-filter-test
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
// nft add chain ip ts-filter-test ts-input-test { type filter hook input priority 0 \; }
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x03\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0b\x00\x07\x00\x66\x69\x6c\x74\x65\x72\x00\x00"),
// nft add rule ip ts-filter-test ts-input-test iifname "lo" ip saddr 192.168.0.2 counter accept
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x02\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\x10\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\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\x6c\x6f\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\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\x00\x02\x2c\x00\x01\x80\x0c\x00\x01\x00\x63\x6f\x75\x6e\x74\x65\x72\x00\x1c\x00\x02\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\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\x01"),
// batch end
[]byte("\x00\x00\x00\x0a"),
}
testConn := newTestConn(t, want)
table := testConn.AddTable(&nftables.Table{
Family: proto,
Name: "ts-filter-test",
})
chain := testConn.AddChain(&nftables.Chain{
Name: "ts-input-test",
Table: table,
Type: nftables.ChainTypeFilter,
Hooknum: nftables.ChainHookInput,
Priority: nftables.ChainPriorityFilter,
})
addr := netip.MustParseAddr("192.168.0.2")
err := insertLoopbackRule(testConn, proto, table, chain, addr)
if err != nil {
t.Fatal(err)
}
}
func TestInsertLoopbackRuleV6(t *testing.T) {
protoV6 := nftables.TableFamilyIPv6
want := [][]byte{
// batch begin
[]byte("\x00\x00\x00\x0a"),
// nft add table ip6 ts-filter-test
[]byte("\x0a\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
// nft add chain ip6 ts-filter-test ts-input-test { type filter hook input priority 0\; }
[]byte("\x0a\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x03\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0b\x00\x07\x00\x66\x69\x6c\x74\x65\x72\x00\x00"),
// nft add rule ip6 ts-filter-test ts-input-test iifname "lo" ip6 addr 2001:db8::1 counter accept
[]byte("\x0a\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x02\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\x1c\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\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\x6c\x6f\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\x01\x08\x00\x03\x00\x00\x00\x00\x08\x08\x00\x04\x00\x00\x00\x00\x10\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\x20\x01\x0d\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x2c\x00\x01\x80\x0c\x00\x01\x00\x63\x6f\x75\x6e\x74\x65\x72\x00\x1c\x00\x02\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\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\x01"),
// batch end
[]byte("\x00\x00\x00\x0a"),
}
testConn := newTestConn(t, want)
tableV6 := testConn.AddTable(&nftables.Table{
Family: protoV6,
Name: "ts-filter-test",
})
chainV6 := testConn.AddChain(&nftables.Chain{
Name: "ts-input-test",
Table: tableV6,
Type: nftables.ChainTypeFilter,
Hooknum: nftables.ChainHookInput,
Priority: nftables.ChainPriorityFilter,
})
addrV6 := netip.MustParseAddr("2001:db8::1")
err := insertLoopbackRule(testConn, protoV6, tableV6, chainV6, addrV6)
if err != nil {
t.Fatal(err)
}
}
func TestAddReturnChromeOSVMRangeRule(t *testing.T) {
proto := nftables.TableFamilyIPv4
want := [][]byte{
// batch begin
[]byte("\x00\x00\x00\x0a"),
// nft add table ip ts-filter-test
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
// nft add chain ip ts-filter-test ts-input-test { type filter hook input priority 0\; }
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x03\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0b\x00\x07\x00\x66\x69\x6c\x74\x65\x72\x00\x00"),
// nft add rule ip ts-filter-test ts-input-test iifname != "testTunn" ip saddr 100.115.92.0/23 counter return
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x02\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\x58\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\x30\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x01\x10\x00\x03\x80\x0c\x00\x01\x00\x74\x65\x73\x74\x54\x75\x6e\x6e\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\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\x04\x0c\x00\x04\x80\x08\x00\x01\x00\xff\xff\xfe\x00\x0c\x00\x05\x80\x08\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\x00\x0c\x00\x03\x80\x08\x00\x01\x00\x64\x73\x5c\x00\x2c\x00\x01\x80\x0c\x00\x01\x00\x63\x6f\x75\x6e\x74\x65\x72\x00\x1c\x00\x02\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\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\xff\xff\xff\xfb"),
// batch end
[]byte("\x00\x00\x00\x0a"),
}
testConn := newTestConn(t, want)
table := testConn.AddTable(&nftables.Table{
Family: proto,
Name: "ts-filter-test",
})
chain := testConn.AddChain(&nftables.Chain{
Name: "ts-input-test",
Table: table,
Type: nftables.ChainTypeFilter,
Hooknum: nftables.ChainHookInput,
Priority: nftables.ChainPriorityFilter,
})
err := addReturnChromeOSVMRangeRule(testConn, table, chain, "testTunn")
if err != nil {
t.Fatal(err)
}
}
func TestAddDropCGNATRangeRule(t *testing.T) {
proto := nftables.TableFamilyIPv4
want := [][]byte{
// batch begin
[]byte("\x00\x00\x00\x0a"),
// nft add table ip ts-filter-test
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
// nft add chain ip ts-filter-test ts-input-test { type filter hook input priority filter; }
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x03\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0b\x00\x07\x00\x66\x69\x6c\x74\x65\x72\x00\x00"),
// nft add rule ip ts-filter-test ts-input-test iifname != "testTunn" ip saddr 100.64.0.0/10 counter drop
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x02\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\x58\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\x30\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x01\x10\x00\x03\x80\x0c\x00\x01\x00\x74\x65\x73\x74\x54\x75\x6e\x6e\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\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\x04\x0c\x00\x04\x80\x08\x00\x01\x00\xff\xc0\x00\x00\x0c\x00\x05\x80\x08\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\x00\x0c\x00\x03\x80\x08\x00\x01\x00\x64\x40\x00\x00\x2c\x00\x01\x80\x0c\x00\x01\x00\x63\x6f\x75\x6e\x74\x65\x72\x00\x1c\x00\x02\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\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"),
}
testConn := newTestConn(t, want)
table := testConn.AddTable(&nftables.Table{
Family: proto,
Name: "ts-filter-test",
})
chain := testConn.AddChain(&nftables.Chain{
Name: "ts-input-test",
Table: table,
Type: nftables.ChainTypeFilter,
Hooknum: nftables.ChainHookInput,
Priority: nftables.ChainPriorityFilter,
})
err := addDropCGNATRangeRule(testConn, table, chain, "testTunn")
if err != nil {
t.Fatal(err)
}
}
func TestAddSetSubnetRouteMarkRule(t *testing.T) {
proto := nftables.TableFamilyIPv4
want := [][]byte{
// batch begin
[]byte("\x00\x00\x00\x0a"),
// nft add table ip ts-filter-test
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
// nft add chain ip ts-filter-test ts-forward-test { type filter hook forward priority 0\; }
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x14\x00\x03\x00\x74\x73\x2d\x66\x6f\x72\x77\x61\x72\x64\x2d\x74\x65\x73\x74\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 ts-filter-test ts-forward-test iifname "testTunn" counter meta mark set mark and 0xff00ffff xor 0x40000
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x14\x00\x02\x00\x74\x73\x2d\x66\x6f\x72\x77\x61\x72\x64\x2d\x74\x65\x73\x74\x00\x10\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\x30\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x10\x00\x03\x80\x0c\x00\x01\x00\x74\x65\x73\x74\x54\x75\x6e\x6e\x2c\x00\x01\x80\x0c\x00\x01\x00\x63\x6f\x75\x6e\x74\x65\x72\x00\x1c\x00\x02\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\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\x03\x08\x00\x01\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\x04\x0c\x00\x04\x80\x08\x00\x01\x00\xff\x00\xff\xff\x0c\x00\x05\x80\x08\x00\x01\x00\x00\x04\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\x03\x08\x00\x03\x00\x00\x00\x00\x01"),
// batch end
[]byte("\x00\x00\x00\x0a"),
}
testConn := newTestConn(t, want)
table := testConn.AddTable(&nftables.Table{
Family: proto,
Name: "ts-filter-test",
})
chain := testConn.AddChain(&nftables.Chain{
Name: "ts-forward-test",
Table: table,
Type: nftables.ChainTypeFilter,
Hooknum: nftables.ChainHookForward,
Priority: nftables.ChainPriorityFilter,
})
err := addSetSubnetRouteMarkRule(testConn, table, chain, "testTunn")
if err != nil {
t.Fatal(err)
}
}
func TestAddDropOutgoingPacketFromCGNATRangeRuleWithTunname(t *testing.T) {
proto := nftables.TableFamilyIPv4
want := [][]byte{
// batch begin
[]byte("\x00\x00\x00\x0a"),
// nft add table ip ts-filter-test
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
// nft add chain ip ts-filter-test ts-forward-test { type filter hook forward priority 0\; }
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x14\x00\x03\x00\x74\x73\x2d\x66\x6f\x72\x77\x61\x72\x64\x2d\x74\x65\x73\x74\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 ts-filter-test ts-forward-test oifname "testTunn" ip saddr 100.64.0.0/10 counter drop
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x14\x00\x02\x00\x74\x73\x2d\x66\x6f\x72\x77\x61\x72\x64\x2d\x74\x65\x73\x74\x00\x58\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\x30\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x10\x00\x03\x80\x0c\x00\x01\x00\x74\x65\x73\x74\x54\x75\x6e\x6e\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\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\x04\x0c\x00\x04\x80\x08\x00\x01\x00\xff\xc0\x00\x00\x0c\x00\x05\x80\x08\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\x00\x0c\x00\x03\x80\x08\x00\x01\x00\x64\x40\x00\x00\x2c\x00\x01\x80\x0c\x00\x01\x00\x63\x6f\x75\x6e\x74\x65\x72\x00\x1c\x00\x02\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\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"),
}
testConn := newTestConn(t, want)
table := testConn.AddTable(&nftables.Table{
Family: proto,
Name: "ts-filter-test",
})
chain := testConn.AddChain(&nftables.Chain{
Name: "ts-forward-test",
Table: table,
Type: nftables.ChainTypeFilter,
Hooknum: nftables.ChainHookForward,
Priority: nftables.ChainPriorityFilter,
})
err := addDropOutgoingPacketFromCGNATRangeRuleWithTunname(testConn, table, chain, "testTunn")
if err != nil {
t.Fatal(err)
}
}
func TestAddAcceptOutgoingPacketRule(t *testing.T) {
proto := nftables.TableFamilyIPv4
want := [][]byte{
// batch begin
[]byte("\x00\x00\x00\x0a"),
// nft add table ip ts-filter-test
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
// nft add chain ip ts-filter-test ts-forward-test { type filter hook forward priority 0\; }
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x14\x00\x03\x00\x74\x73\x2d\x66\x6f\x72\x77\x61\x72\x64\x2d\x74\x65\x73\x74\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 ts-filter-test ts-forward-test oifname "testTunn" counter accept
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x14\x00\x02\x00\x74\x73\x2d\x66\x6f\x72\x77\x61\x72\x64\x2d\x74\x65\x73\x74\x00\xb4\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\x30\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x10\x00\x03\x80\x0c\x00\x01\x00\x74\x65\x73\x74\x54\x75\x6e\x6e\x2c\x00\x01\x80\x0c\x00\x01\x00\x63\x6f\x75\x6e\x74\x65\x72\x00\x1c\x00\x02\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\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\x01"),
// batch end
[]byte("\x00\x00\x00\x0a"),
}
testConn := newTestConn(t, want)
table := testConn.AddTable(&nftables.Table{
Family: proto,
Name: "ts-filter-test",
})
chain := testConn.AddChain(&nftables.Chain{
Name: "ts-forward-test",
Table: table,
Type: nftables.ChainTypeFilter,
Hooknum: nftables.ChainHookForward,
Priority: nftables.ChainPriorityFilter,
})
err := addAcceptOutgoingPacketRule(testConn, table, chain, "testTunn")
if err != nil {
t.Fatal(err)
}
}
util/linuxfw: add missing input rule to the tailscale tun Add an explicit accept rule for input to the tun interface, as a mirror to the explicit rule to accept output from the tun interface. The rule matches any packet in to our tun interface and accepts it, and the rule is positioned and prioritized such that it should be evaluated prior to conventional ufw/iptables/nft rules. Updates #391 Fixes #7332 Updates #9084 Signed-off-by: James Tucker <james@tailscale.com>
2023-08-25 01:15:03 +00:00
func TestAddAcceptIncomingPacketRule(t *testing.T) {
proto := nftables.TableFamilyIPv4
want := [][]byte{
// batch begin
[]byte("\x00\x00\x00\x0a"),
// nft add table ip ts-filter-test
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
// nft add chain ip ts-filter-test ts-input-test { type filter hook input priority 0\; }
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x03\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\x14\x00\x04\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x0b\x00\x07\x00\x66\x69\x6c\x74\x65\x72\x00\x00"),
// nft add rule ip ts-filter-test ts-input-test iifname "testTunn" counter accept
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x12\x00\x02\x00\x74\x73\x2d\x69\x6e\x70\x75\x74\x2d\x74\x65\x73\x74\x00\x00\x00\xb4\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\x06\x08\x00\x01\x00\x00\x00\x00\x01\x30\x00\x01\x80\x08\x00\x01\x00\x63\x6d\x70\x00\x24\x00\x02\x80\x08\x00\x01\x00\x00\x00\x00\x01\x08\x00\x02\x00\x00\x00\x00\x00\x10\x00\x03\x80\x0c\x00\x01\x00\x74\x65\x73\x74\x54\x75\x6e\x6e\x2c\x00\x01\x80\x0c\x00\x01\x00\x63\x6f\x75\x6e\x74\x65\x72\x00\x1c\x00\x02\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\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\x01"),
// batch end
[]byte("\x00\x00\x00\x0a"),
}
testConn := newTestConn(t, want)
table := testConn.AddTable(&nftables.Table{
Family: proto,
Name: "ts-filter-test",
})
chain := testConn.AddChain(&nftables.Chain{
Name: "ts-input-test",
Table: table,
Type: nftables.ChainTypeFilter,
Hooknum: nftables.ChainHookInput,
Priority: nftables.ChainPriorityFilter,
})
err := addAcceptIncomingPacketRule(testConn, table, chain, "testTunn")
if err != nil {
t.Fatal(err)
}
}
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
func TestAddMatchSubnetRouteMarkRuleMasq(t *testing.T) {
proto := nftables.TableFamilyIPv4
want := [][]byte{
// batch begin
[]byte("\x00\x00\x00\x0a"),
// nft add table ip ts-nat-test
[]byte("\x02\x00\x00\x00\x10\x00\x01\x00\x74\x73\x2d\x6e\x61\x74\x2d\x74\x65\x73\x74\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
// nft add chain ip ts-nat-test ts-postrouting-test { type nat hook postrouting priority 100; }
[]byte("\x02\x00\x00\x00\x10\x00\x01\x00\x74\x73\x2d\x6e\x61\x74\x2d\x74\x65\x73\x74\x00\x18\x00\x03\x00\x74\x73\x2d\x70\x6f\x73\x74\x72\x6f\x75\x74\x69\x6e\x67\x2d\x74\x65\x73\x74\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 ip ts-nat-test ts-postrouting-test meta mark & 0x00ff0000 == 0x00040000 counter masquerade
[]byte("\x02\x00\x00\x00\x10\x00\x01\x00\x74\x73\x2d\x6e\x61\x74\x2d\x74\x65\x73\x74\x00\x18\x00\x02\x00\x74\x73\x2d\x70\x6f\x73\x74\x72\x6f\x75\x74\x69\x6e\x67\x2d\x74\x65\x73\x74\x00\xf4\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\x03\x08\x00\x01\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\x04\x0c\x00\x04\x80\x08\x00\x01\x00\x00\xff\x00\x00\x0c\x00\x05\x80\x08\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\x00\x0c\x00\x03\x80\x08\x00\x01\x00\x00\x04\x00\x00\x2c\x00\x01\x80\x0c\x00\x01\x00\x63\x6f\x75\x6e\x74\x65\x72\x00\x1c\x00\x02\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\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\x01"),
// batch end
[]byte("\x00\x00\x00\x0a"),
}
testConn := newTestConn(t, want)
table := testConn.AddTable(&nftables.Table{
Family: proto,
Name: "ts-nat-test",
})
chain := testConn.AddChain(&nftables.Chain{
Name: "ts-postrouting-test",
Table: table,
Type: nftables.ChainTypeNAT,
Hooknum: nftables.ChainHookPostrouting,
Priority: nftables.ChainPriorityNATSource,
})
err := addMatchSubnetRouteMarkRule(testConn, table, chain, Accept)
if err != nil {
t.Fatal(err)
}
}
func TestAddMatchSubnetRouteMarkRuleAccept(t *testing.T) {
proto := nftables.TableFamilyIPv4
want := [][]byte{
// batch begin
[]byte("\x00\x00\x00\x0a"),
// nft add table ip ts-filter-test
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x08\x00\x02\x00\x00\x00\x00\x00"),
// nft add chain ip ts-filter-test ts-forward-test { type filter hook forward priority 0\; }
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x14\x00\x03\x00\x74\x73\x2d\x66\x6f\x72\x77\x61\x72\x64\x2d\x74\x65\x73\x74\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 ts-filter-test ts-forward-test meta mark and 0x00ff0000 eq 0x00040000 counter accept
[]byte("\x02\x00\x00\x00\x13\x00\x01\x00\x74\x73\x2d\x66\x69\x6c\x74\x65\x72\x2d\x74\x65\x73\x74\x00\x00\x14\x00\x02\x00\x74\x73\x2d\x66\x6f\x72\x77\x61\x72\x64\x2d\x74\x65\x73\x74\x00\xf4\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\x03\x08\x00\x01\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\x04\x0c\x00\x04\x80\x08\x00\x01\x00\x00\xff\x00\x00\x0c\x00\x05\x80\x08\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\x00\x0c\x00\x03\x80\x08\x00\x01\x00\x00\x04\x00\x00\x2c\x00\x01\x80\x0c\x00\x01\x00\x63\x6f\x75\x6e\x74\x65\x72\x00\x1c\x00\x02\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\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\x01"),
// batch end
[]byte("\x00\x00\x00\x0a"),
}
testConn := newTestConn(t, want)
table := testConn.AddTable(&nftables.Table{
Family: proto,
Name: "ts-filter-test",
})
chain := testConn.AddChain(&nftables.Chain{
Name: "ts-forward-test",
Table: table,
Type: nftables.ChainTypeFilter,
Hooknum: nftables.ChainHookForward,
Priority: nftables.ChainPriorityFilter,
})
err := addMatchSubnetRouteMarkRule(testConn, table, chain, Accept)
if err != nil {
t.Fatal(err)
}
}
func newSysConn(t *testing.T) *nftables.Conn {
t.Helper()
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
if os.Geteuid() != 0 {
t.Skip(t.Name(), " requires privileges to create a namespace in order to run")
return nil
}
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
runtime.LockOSThread()
ns, err := netns.New()
if err != nil {
t.Fatalf("netns.New() failed: %v", err)
}
c, err := nftables.New(nftables.WithNetNSFd(int(ns)))
if err != nil {
t.Fatalf("nftables.New() failed: %v", err)
}
t.Cleanup(func() { cleanupSysConn(t, ns) })
return c
}
func cleanupSysConn(t *testing.T, ns netns.NsHandle) {
defer runtime.UnlockOSThread()
if err := ns.Close(); err != nil {
t.Fatalf("newNS.Close() failed: %v", err)
}
}
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
func checkChains(t *testing.T, conn *nftables.Conn, fam nftables.TableFamily, wantCount int) {
t.Helper()
got, err := conn.ListChainsOfTableFamily(fam)
if err != nil {
t.Fatalf("conn.ListChainsOfTableFamily(%v) failed: %v", fam, err)
}
if len(got) != wantCount {
t.Fatalf("len(got) = %d, want %d", len(got), wantCount)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
}
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
}
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
func checkTables(t *testing.T, conn *nftables.Conn, fam nftables.TableFamily, wantCount int) {
t.Helper()
got, err := conn.ListTablesOfFamily(fam)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
if err != nil {
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
t.Fatalf("conn.ListTablesOfFamily(%v) failed: %v", fam, err)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
}
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
if len(got) != wantCount {
t.Fatalf("len(got) = %d, want %d", len(got), wantCount)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
}
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
}
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
func TestAddAndDelNetfilterChains(t *testing.T) {
type test struct {
hostHasIPv6 bool
initIPv4ChainCount int
initIPv6ChainCount int
ipv4TableCount int
ipv6TableCount int
ipv4ChainCount int
ipv6ChainCount int
ipv4ChainCountPostDelete int
ipv6ChainCountPostDelete int
}
tests := []test{
{
hostHasIPv6: true,
initIPv4ChainCount: 0,
initIPv6ChainCount: 0,
ipv4TableCount: 2,
ipv6TableCount: 2,
ipv4ChainCount: 6,
ipv6ChainCount: 6,
ipv4ChainCountPostDelete: 3,
ipv6ChainCountPostDelete: 3,
},
{ // host without IPv6 support
ipv4TableCount: 2,
ipv4ChainCount: 6,
ipv4ChainCountPostDelete: 3,
}}
for _, tt := range tests {
t.Logf("running a test case for IPv6 support: %v", tt.hostHasIPv6)
conn := newSysConn(t)
runner := newFakeNftablesRunnerWithConn(t, conn, tt.hostHasIPv6)
// Check that we start off with no chains.
checkChains(t, conn, nftables.TableFamilyIPv4, tt.initIPv4ChainCount)
checkChains(t, conn, nftables.TableFamilyIPv6, tt.initIPv6ChainCount)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
if err := runner.AddChains(); err != nil {
t.Fatalf("runner.AddChains() failed: %v", err)
}
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
// Check that the amount of tables for each IP family is as expected.
checkTables(t, conn, nftables.TableFamilyIPv4, tt.ipv4TableCount)
checkTables(t, conn, nftables.TableFamilyIPv6, tt.ipv6TableCount)
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
// Check that the amount of chains for each IP family is as expected.
checkChains(t, conn, nftables.TableFamilyIPv4, tt.ipv4ChainCount)
checkChains(t, conn, nftables.TableFamilyIPv6, tt.ipv6ChainCount)
if err := runner.DelChains(); err != nil {
t.Fatalf("runner.DelChains() failed: %v", err)
}
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
// Test that the tables as well as the default chains are still present.
checkChains(t, conn, nftables.TableFamilyIPv4, tt.ipv4ChainCountPostDelete)
checkChains(t, conn, nftables.TableFamilyIPv6, tt.ipv6ChainCountPostDelete)
checkTables(t, conn, nftables.TableFamilyIPv4, tt.ipv4TableCount)
checkTables(t, conn, nftables.TableFamilyIPv6, tt.ipv6TableCount)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
}
}
func getTsChains(
conn *nftables.Conn,
proto nftables.TableFamily) (*nftables.Chain, *nftables.Chain, *nftables.Chain, error) {
chains, err := conn.ListChainsOfTableFamily(nftables.TableFamilyIPv4)
if err != nil {
return nil, nil, nil, fmt.Errorf("list chains failed: %w", err)
}
var chainInput, chainForward, chainPostrouting *nftables.Chain
for _, chain := range chains {
switch chain.Name {
case "ts-input":
chainInput = chain
case "ts-forward":
chainForward = chain
case "ts-postrouting":
chainPostrouting = chain
}
}
return chainInput, chainForward, chainPostrouting, nil
}
// findV4BaseRules verifies that the base rules are present in the input and forward chains.
func findV4BaseRules(
conn *nftables.Conn,
inpChain *nftables.Chain,
forwChain *nftables.Chain,
tunname string) ([]*nftables.Rule, error) {
want := []*nftables.Rule{}
rule, err := createRangeRule(inpChain.Table, inpChain, tunname, tsaddr.ChromeOSVMRange(), expr.VerdictReturn)
if err != nil {
return nil, fmt.Errorf("create rule: %w", err)
}
want = append(want, rule)
rule, err = createRangeRule(inpChain.Table, inpChain, tunname, tsaddr.CGNATRange(), expr.VerdictDrop)
if err != nil {
return nil, fmt.Errorf("create rule: %w", err)
}
want = append(want, rule)
rule, err = createDropOutgoingPacketFromCGNATRangeRuleWithTunname(forwChain.Table, forwChain, tunname)
if err != nil {
return nil, fmt.Errorf("create rule: %w", err)
}
want = append(want, rule)
get := []*nftables.Rule{}
for _, rule := range want {
getRule, err := findRule(conn, rule)
if err != nil {
return nil, fmt.Errorf("find rule: %w", err)
}
get = append(get, getRule)
}
return get, nil
}
func findCommonBaseRules(
conn *nftables.Conn,
forwChain *nftables.Chain,
tunname string) ([]*nftables.Rule, error) {
want := []*nftables.Rule{}
rule, err := createSetSubnetRouteMarkRule(forwChain.Table, forwChain, tunname)
if err != nil {
return nil, fmt.Errorf("create rule: %w", err)
}
want = append(want, rule)
rule, err = createMatchSubnetRouteMarkRule(forwChain.Table, forwChain, Accept)
if err != nil {
return nil, fmt.Errorf("create rule: %w", err)
}
want = append(want, rule)
rule = createAcceptOutgoingPacketRule(forwChain.Table, forwChain, tunname)
want = append(want, rule)
get := []*nftables.Rule{}
for _, rule := range want {
getRule, err := findRule(conn, rule)
if err != nil {
return nil, fmt.Errorf("find rule: %w", err)
}
get = append(get, getRule)
}
return get, nil
}
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
// checkChainRules verifies that the chain has the expected number of rules.
func checkChainRules(t *testing.T, conn *nftables.Conn, chain *nftables.Chain, wantCount int) {
t.Helper()
got, err := conn.GetRules(chain.Table, chain)
if err != nil {
t.Fatalf("conn.GetRules() failed: %v", err)
}
if len(got) != wantCount {
t.Fatalf("got = %d, want %d", len(got), wantCount)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
}
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
}
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
func TestNFTAddAndDelNetfilterBase(t *testing.T) {
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
conn := newSysConn(t)
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
runner := newFakeNftablesRunnerWithConn(t, conn, true)
util/linuxfw: add missing error checks in tests This would surface as panics when run on Fly. Still fail, but at least don't panic. Updates #10003 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-28 04:56:17 +00:00
if err := runner.AddChains(); err != nil {
t.Fatalf("AddChains() failed: %v", err)
}
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
defer runner.DelChains()
util/linuxfw: add missing error checks in tests This would surface as panics when run on Fly. Still fail, but at least don't panic. Updates #10003 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-28 04:56:17 +00:00
if err := runner.AddBase("testTunn"); err != nil {
t.Fatalf("AddBase() failed: %v", err)
}
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
// check number of rules in each IPv4 TS chain
inputV4, forwardV4, postroutingV4, err := getTsChains(conn, nftables.TableFamilyIPv4)
if err != nil {
t.Fatalf("getTsChains() failed: %v", err)
}
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
checkChainRules(t, conn, inputV4, 3)
checkChainRules(t, conn, forwardV4, 4)
checkChainRules(t, conn, postroutingV4, 0)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
_, err = findV4BaseRules(conn, inputV4, forwardV4, "testTunn")
if err != nil {
t.Fatalf("missing v4 base rule: %v", err)
}
_, err = findCommonBaseRules(conn, forwardV4, "testTunn")
if err != nil {
t.Fatalf("missing v4 base rule: %v", err)
}
// Check number of rules in each IPv6 TS chain.
inputV6, forwardV6, postroutingV6, err := getTsChains(conn, nftables.TableFamilyIPv6)
if err != nil {
t.Fatalf("getTsChains() failed: %v", err)
}
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
checkChainRules(t, conn, inputV6, 3)
checkChainRules(t, conn, forwardV6, 4)
checkChainRules(t, conn, postroutingV6, 0)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
_, err = findCommonBaseRules(conn, forwardV6, "testTunn")
if err != nil {
t.Fatalf("missing v6 base rule: %v", err)
}
runner.DelBase()
chains, err := conn.ListChains()
if err != nil {
t.Fatalf("conn.ListChains() failed: %v", err)
}
for _, chain := range chains {
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
checkChainRules(t, conn, chain, 0)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
}
}
func findLoopBackRule(conn *nftables.Conn, proto nftables.TableFamily, table *nftables.Table, chain *nftables.Chain, addr netip.Addr) (*nftables.Rule, error) {
matchingAddr := addr.AsSlice()
saddrExpr, err := newLoadSaddrExpr(proto, 1)
if err != nil {
return nil, fmt.Errorf("get expr: %w", err)
}
loopBackRule := &nftables.Rule{
Table: table,
Chain: chain,
Exprs: []expr.Any{
&expr.Meta{
Key: expr.MetaKeyIIFNAME,
Register: 1,
},
&expr.Cmp{
Op: expr.CmpOpEq,
Register: 1,
Data: []byte("lo"),
},
saddrExpr,
&expr.Cmp{
Op: expr.CmpOpEq,
Register: 1,
Data: matchingAddr,
},
&expr.Counter{},
&expr.Verdict{
Kind: expr.VerdictAccept,
},
},
}
existingLoopBackRule, err := findRule(conn, loopBackRule)
if err != nil {
return nil, fmt.Errorf("find loop back rule: %w", err)
}
return existingLoopBackRule, nil
}
func TestNFTAddAndDelLoopbackRule(t *testing.T) {
conn := newSysConn(t)
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
runner := newFakeNftablesRunnerWithConn(t, conn, true)
util/linuxfw: add missing error checks in tests This would surface as panics when run on Fly. Still fail, but at least don't panic. Updates #10003 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-28 04:56:17 +00:00
if err := runner.AddChains(); err != nil {
t.Fatalf("AddChains() failed: %v", err)
}
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
defer runner.DelChains()
inputV4, _, _, err := getTsChains(conn, nftables.TableFamilyIPv4)
if err != nil {
t.Fatalf("getTsChains() failed: %v", err)
}
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
inputV6, _, _, err := getTsChains(conn, nftables.TableFamilyIPv6)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
if err != nil {
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
t.Fatalf("getTsChains() failed: %v", err)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
}
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
checkChainRules(t, conn, inputV4, 0)
checkChainRules(t, conn, inputV6, 0)
runner.AddBase("testTunn")
defer runner.DelBase()
checkChainRules(t, conn, inputV4, 3)
checkChainRules(t, conn, inputV6, 3)
addr := netip.MustParseAddr("192.168.0.2")
addrV6 := netip.MustParseAddr("2001:db8::2")
runner.AddLoopbackRule(addr)
runner.AddLoopbackRule(addrV6)
checkChainRules(t, conn, inputV4, 4)
checkChainRules(t, conn, inputV6, 4)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
existingLoopBackRule, err := findLoopBackRule(conn, nftables.TableFamilyIPv4, runner.nft4.Filter, inputV4, addr)
if err != nil {
t.Fatalf("findLoopBackRule() failed: %v", err)
}
if existingLoopBackRule.Position != 0 {
t.Fatalf("existingLoopBackRule.Handle = %d, want 0", existingLoopBackRule.Handle)
}
existingLoopBackRuleV6, err := findLoopBackRule(conn, nftables.TableFamilyIPv6, runner.nft6.Filter, inputV6, addrV6)
if err != nil {
t.Fatalf("findLoopBackRule() failed: %v", err)
}
if existingLoopBackRuleV6.Position != 0 {
t.Fatalf("existingLoopBackRule.Handle = %d, want 0", existingLoopBackRule.Handle)
}
runner.DelLoopbackRule(addr)
runner.DelLoopbackRule(addrV6)
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
checkChainRules(t, conn, inputV4, 3)
checkChainRules(t, conn, inputV6, 3)
util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-06-19 20:05:14 +00:00
}
util/linuxfw: reorganize nftables rules to allow it to work with ufw This commit tries to mimic the way iptables-nft work with the filewall rules. We follow the convention of using tables like filter, nat and the conventional chains, to make our nftables implementation work with ufw. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-08-18 18:41:28 +00:00
func TestNFTAddAndDelHookRule(t *testing.T) {
conn := newSysConn(t)
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
runner := newFakeNftablesRunnerWithConn(t, conn, true)
util/linuxfw: add missing error checks in tests This would surface as panics when run on Fly. Still fail, but at least don't panic. Updates #10003 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-28 04:56:17 +00:00
if err := runner.AddChains(); err != nil {
t.Fatalf("AddChains() failed: %v", err)
}
util/linuxfw: reorganize nftables rules to allow it to work with ufw This commit tries to mimic the way iptables-nft work with the filewall rules. We follow the convention of using tables like filter, nat and the conventional chains, to make our nftables implementation work with ufw. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-08-18 18:41:28 +00:00
defer runner.DelChains()
util/linuxfw: add missing error checks in tests This would surface as panics when run on Fly. Still fail, but at least don't panic. Updates #10003 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-28 04:56:17 +00:00
if err := runner.AddHooks(); err != nil {
t.Fatalf("AddHooks() failed: %v", err)
}
util/linuxfw: reorganize nftables rules to allow it to work with ufw This commit tries to mimic the way iptables-nft work with the filewall rules. We follow the convention of using tables like filter, nat and the conventional chains, to make our nftables implementation work with ufw. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-08-18 18:41:28 +00:00
forwardChain, err := getChainFromTable(conn, runner.nft4.Filter, "FORWARD")
if err != nil {
t.Fatalf("failed to get forwardChain: %v", err)
}
inputChain, err := getChainFromTable(conn, runner.nft4.Filter, "INPUT")
if err != nil {
t.Fatalf("failed to get inputChain: %v", err)
}
postroutingChain, err := getChainFromTable(conn, runner.nft4.Nat, "POSTROUTING")
if err != nil {
t.Fatalf("failed to get postroutingChain: %v", err)
}
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
checkChainRules(t, conn, forwardChain, 1)
checkChainRules(t, conn, inputChain, 1)
checkChainRules(t, conn, postroutingChain, 1)
util/linuxfw: reorganize nftables rules to allow it to work with ufw This commit tries to mimic the way iptables-nft work with the filewall rules. We follow the convention of using tables like filter, nat and the conventional chains, to make our nftables implementation work with ufw. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-08-18 18:41:28 +00:00
runner.DelHooks(t.Logf)
util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
checkChainRules(t, conn, forwardChain, 0)
checkChainRules(t, conn, inputChain, 0)
checkChainRules(t, conn, postroutingChain, 0)
util/linuxfw: reorganize nftables rules to allow it to work with ufw This commit tries to mimic the way iptables-nft work with the filewall rules. We follow the convention of using tables like filter, nat and the conventional chains, to make our nftables implementation work with ufw. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>
2023-08-18 18:41:28 +00:00
}
util/linuxfw: move detection logic Just a refactor to consolidate the firewall detection logic in a single package so that it can be reused in a later commit by containerboot. Updates #9310 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-11 01:26:52 +00:00
type testFWDetector struct {
iptRuleCount, nftRuleCount int
iptErr, nftErr error
}
func (t *testFWDetector) iptDetect() (int, error) {
return t.iptRuleCount, t.iptErr
}
func (t *testFWDetector) nftDetect() (int, error) {
return t.nftRuleCount, t.nftErr
}
util/linuxfw: add additional nftable detection logic We were previously using the netlink API to see if there are chains/rules that already exist. This works fine in environments where there is either full nftable support or no support at all. However, we have identified certain environments which have partial nftable support and the only feasible way of detecting such an environment is to try to create some of the chains that we need. This adds a check to create a dummy postrouting chain which is immediately deleted. The goal of the check is to ensure we are able to use nftables and that it won't error out later. This check is only done in the path where we detected that the system has no preexisting nftable rules. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
// TestCreateDummyPostroutingChains tests that on a system with nftables
// available, the function does not return an error and that the dummy
// postrouting chains are cleaned up.
func TestCreateDummyPostroutingChains(t *testing.T) {
conn := newSysConn(t)
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
runner := newFakeNftablesRunnerWithConn(t, conn, true)
util/linuxfw: add additional nftable detection logic We were previously using the netlink API to see if there are chains/rules that already exist. This works fine in environments where there is either full nftable support or no support at all. However, we have identified certain environments which have partial nftable support and the only feasible way of detecting such an environment is to try to create some of the chains that we need. This adds a check to create a dummy postrouting chain which is immediately deleted. The goal of the check is to ensure we are able to use nftables and that it won't error out later. This check is only done in the path where we detected that the system has no preexisting nftable rules. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
if err := runner.createDummyPostroutingChains(); err != nil {
t.Fatalf("createDummyPostroutingChains() failed: %v", err)
}
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
for _, table := range runner.getTables() {
util/linuxfw: add additional nftable detection logic We were previously using the netlink API to see if there are chains/rules that already exist. This works fine in environments where there is either full nftable support or no support at all. However, we have identified certain environments which have partial nftable support and the only feasible way of detecting such an environment is to try to create some of the chains that we need. This adds a check to create a dummy postrouting chain which is immediately deleted. The goal of the check is to ensure we are able to use nftables and that it won't error out later. This check is only done in the path where we detected that the system has no preexisting nftable rules. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-17 19:51:40 +00:00
nt, err := getTableIfExists(conn, table.Proto, tsDummyTableName)
if err != nil {
t.Fatalf("getTableIfExists() failed: %v", err)
}
if nt != nil {
t.Fatalf("expected table to be nil, got %v", nt)
}
}
}
util/linuxfw: move detection logic Just a refactor to consolidate the firewall detection logic in a single package so that it can be reused in a later commit by containerboot. Updates #9310 Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-10-11 01:26:52 +00:00
func TestPickFirewallModeFromInstalledRules(t *testing.T) {
tests := []struct {
name string
det *testFWDetector
want FirewallMode
}{
{
name: "using iptables legacy",
det: &testFWDetector{iptRuleCount: 1},
want: FirewallModeIPTables,
},
{
name: "using nftables",
det: &testFWDetector{nftRuleCount: 1},
want: FirewallModeNfTables,
},
{
name: "using both iptables and nftables",
det: &testFWDetector{iptRuleCount: 2, nftRuleCount: 2},
want: FirewallModeNfTables,
},
{
name: "not using any firewall, both available",
det: &testFWDetector{},
want: FirewallModeNfTables,
},
{
name: "not using any firewall, iptables available only",
det: &testFWDetector{iptRuleCount: 1, nftErr: errors.New("nft error")},
want: FirewallModeIPTables,
},
{
name: "not using any firewall, nftables available only",
det: &testFWDetector{iptErr: errors.New("iptables error"), nftRuleCount: 1},
want: FirewallModeNfTables,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := pickFirewallModeFromInstalledRules(t.Logf, tt.det)
if got != tt.want {
t.Errorf("chooseFireWallMode() = %v, want %v", got, tt.want)
}
})
}
}
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
cmd/containerboot,util/linuxfw: create a SNAT rule for dst/src only once, clean up if needed (#13658) The AddSNATRuleForDst rule was adding a new rule each time it was called including: - if a rule already existed - if a rule matching the destination, but with different desired source already existed This was causing issues especially for the in-progress egress HA proxies work, where the rules are now refreshed more frequently, so more redundant rules were being created. This change: - only creates the rule if it doesn't already exist - if a rule for the same dst, but different source is found, delete it - also ensures that egress proxies refresh firewall rules if the node's tailnet IP changes Updates tailscale/tailscale#13406 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-10-03 19:15:00 +00:00
// This test creates a temporary network namespace for the nftables rules being
// set up, so it needs to run in a privileged mode. Locally it needs to be run
// by root, else it will be silently skipped. In CI it runs in a privileged
// container.
func TestEnsureSNATForDst_nftables(t *testing.T) {
conn := newSysConn(t)
runner := newFakeNftablesRunnerWithConn(t, conn, true)
ip1, ip2, ip3 := netip.MustParseAddr("100.99.99.99"), netip.MustParseAddr("100.88.88.88"), netip.MustParseAddr("100.77.77.77")
// 1. A new rule gets added
mustCreateSNATRule_nft(t, runner, ip1, ip2)
chainRuleCount(t, "POSTROUTING", 1, conn, nftables.TableFamilyIPv4)
checkSNATRule_nft(t, runner, runner.nft4.Proto, ip1, ip2)
// 2. Another call to EnsureSNATForDst with the same src and dst does not result in another rule being added.
mustCreateSNATRule_nft(t, runner, ip1, ip2)
chainRuleCount(t, "POSTROUTING", 1, conn, nftables.TableFamilyIPv4) // still just one rule
checkSNATRule_nft(t, runner, runner.nft4.Proto, ip1, ip2)
// 3. Another call to EnsureSNATForDst with a different src and the same dst results in the earlier rule being
// deleted.
mustCreateSNATRule_nft(t, runner, ip3, ip2)
chainRuleCount(t, "POSTROUTING", 1, conn, nftables.TableFamilyIPv4) // still just one rule
checkSNATRule_nft(t, runner, runner.nft4.Proto, ip3, ip2)
// 4. Another call to EnsureSNATForDst with a different dst should not get the earlier rule deleted.
mustCreateSNATRule_nft(t, runner, ip3, ip1)
chainRuleCount(t, "POSTROUTING", 2, conn, nftables.TableFamilyIPv4) // now two rules
checkSNATRule_nft(t, runner, runner.nft4.Proto, ip3, ip1)
}
util/linuxfw: fix IPv6 availability check for nftables (#12009) * util/linuxfw: fix IPv6 NAT availability check for nftables When running firewall in nftables mode, there is no need for a separate NAT availability check (unlike with iptables, there are no hosts that support nftables, but not IPv6 NAT - see tailscale/tailscale#11353). This change fixes a firewall NAT availability check that was using the no-longer set ipv6NATAvailable field by removing the field and using a method that, for nftables, just checks that IPv6 is available. Updates tailscale/tailscale#12008 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-05-14 07:51:53 +00:00
func newFakeNftablesRunnerWithConn(t *testing.T, conn *nftables.Conn, hasIPv6 bool) *nftablesRunner {
t.Helper()
if !hasIPv6 {
tstest.Replace(t, &checkIPv6ForTest, func(logger.Logf) error {
return errors.New("test: no IPv6")
})
}
return newNfTablesRunnerWithConn(t.Logf, conn)
}
cmd/containerboot,util/linuxfw: create a SNAT rule for dst/src only once, clean up if needed (#13658) The AddSNATRuleForDst rule was adding a new rule each time it was called including: - if a rule already existed - if a rule matching the destination, but with different desired source already existed This was causing issues especially for the in-progress egress HA proxies work, where the rules are now refreshed more frequently, so more redundant rules were being created. This change: - only creates the rule if it doesn't already exist - if a rule for the same dst, but different source is found, delete it - also ensures that egress proxies refresh firewall rules if the node's tailnet IP changes Updates tailscale/tailscale#13406 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-10-03 19:15:00 +00:00
func mustCreateSNATRule_nft(t *testing.T, runner *nftablesRunner, src, dst netip.Addr) {
t.Helper()
if err := runner.EnsureSNATForDst(src, dst); err != nil {
t.Fatalf("error ensuring SNAT rule: %v", err)
}
}
// checkSNATRule_nft verifies that a SNAT rule for the given destination and source exists.
func checkSNATRule_nft(t *testing.T, runner *nftablesRunner, fam nftables.TableFamily, src, dst netip.Addr) {
t.Helper()
chains, err := runner.conn.ListChainsOfTableFamily(fam)
if err != nil {
t.Fatalf("error listing chains: %v", err)
}
var chain *nftables.Chain
for _, ch := range chains {
if ch.Name == "POSTROUTING" {
chain = ch
break
}
}
if chain == nil {
t.Fatal("POSTROUTING chain does not exist")
}
meta := []byte(fmt.Sprintf("dst:%s,src:%s", dst.String(), src.String()))
wantsRule := snatRule(chain.Table, chain, src, dst, meta)
checkRule(t, wantsRule, runner.conn)
}
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