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Pull request 2270: AGDNS-2374-slog-ipset

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Squashed commit of the following:

commit 51ff7d8c49
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Thu Aug 22 13:50:10 2024 +0300

    dnsforward: imp code

commit a1c0011273
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Aug 21 21:53:01 2024 +0300

    dnsforward: imp code

commit a64fd6b3f0
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Aug 21 21:28:48 2024 +0300

    dnsforward: imp code

commit 37ccae4e92
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Aug 21 20:23:58 2024 +0300

    all: imp code

commit 03c69ab272
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Aug 21 19:08:30 2024 +0300

    all: imp code

commit 72adfb101f
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Aug 21 16:42:44 2024 +0300

    all: slog ipset
This commit is contained in:
Stanislav Chzhen 2024-08-26 13:30:00 +03:00
parent 30c0bbe5cc
commit 738958d90a
8 changed files with 157 additions and 87 deletions
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14
internal/dnsforward/config.go
View file

@ -159,7 +159,7 @@ type Config struct {
// IpsetList is the ipset configuration that allows AdGuard Home to add IP
// addresses of the specified domain names to an ipset list. Syntax:
//
// DOMAIN[,DOMAIN].../IPSET_NAME
// DOMAIN[,DOMAIN].../IPSET_NAME[,IPSET_NAME]...
//
// This field is ignored if [IpsetListFileName] is set.
IpsetList []string `yaml:"ipset"`
@ -457,24 +457,24 @@ func (s *Server) initDefaultSettings() {
// prepareIpsetListSettings reads and prepares the ipset configuration either
// from a file or from the data in the configuration file.
func (s *Server) prepareIpsetListSettings() (err error) {
func (s *Server) prepareIpsetListSettings() (ipsets []string, err error) {
fn := s.conf.IpsetListFileName
if fn == "" {
return s.ipset.init(s.conf.IpsetList)
return s.conf.IpsetList, nil
}
// #nosec G304 -- Trust the path explicitly given by the user.
data, err := os.ReadFile(fn)
if err != nil {
return err
return nil, err
}
ipsets := stringutil.SplitTrimmed(string(data), "\n")
ipsets = stringutil.FilterOut(ipsets, IsCommentOrEmpty)
ipsets = stringutil.SplitTrimmed(string(data), "\n")
ipsets = slices.DeleteFunc(ipsets, IsCommentOrEmpty)
log.Debug("dns: using %d ipset rules from file %q", len(ipsets), fn)
return s.ipset.init(ipsets)
return ipsets, nil
}
// loadUpstreams parses upstream DNS servers from the configured file or from

14
internal/dnsforward/dnsforward.go
View file

@ -133,8 +133,9 @@ type Server struct {
// must be a valid domain name plus dots on each side.
localDomainSuffix string
// ipset processes DNS requests using ipset data.
ipset ipsetCtx
// ipset processes DNS requests using ipset data. It must not be nil after
// initialization. See [newIpsetHandler].
ipset *ipsetHandler
// privateNets is the configured set of IP networks considered private.
privateNets netutil.SubnetSet
@ -609,11 +610,18 @@ func (s *Server) prepareLocalResolvers() (uc *proxy.UpstreamConfig, err error) {
// the primary DNS proxy instance. It assumes s.serverLock is locked or the
// Server not running.
func (s *Server) prepareInternalDNS() (err error) {
err = s.prepareIpsetListSettings()
ipsetList, err := s.prepareIpsetListSettings()
if err != nil {
return fmt.Errorf("preparing ipset settings: %w", err)
}
ipsetLogger := s.logger.With(slogutil.KeyPrefix, "ipset")
s.ipset, err = newIpsetHandler(context.TODO(), ipsetLogger, ipsetList)
if err != nil {
// Don't wrap the error, because it's informative enough as is.
return err
}
bootOpts := &upstream.Options{
Timeout: DefaultTimeout,
HTTPVersions: UpstreamHTTPVersions(s.conf.UseHTTP3Upstreams),

87
internal/dnsforward/ipset.go
View file

@ -1,28 +1,43 @@
package dnsforward
import (
"context"
"fmt"
"log/slog"
"net"
"os"
"strings"
"github.com/AdguardTeam/AdGuardHome/internal/ipset"
"github.com/AdguardTeam/golibs/errors"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/golibs/logutil/slogutil"
"github.com/miekg/dns"
)
// ipsetCtx is the ipset context. ipsetMgr can be nil.
type ipsetCtx struct {
// ipsetHandler is the ipset context. ipsetMgr can be nil.
type ipsetHandler struct {
ipsetMgr ipset.Manager
logger *slog.Logger
}
// init initializes the ipset context. It is not safe for concurrent use.
//
// TODO(a.garipov): Rewrite into a simple constructor?
func (c *ipsetCtx) init(ipsetConf []string) (err error) {
c.ipsetMgr, err = ipset.NewManager(ipsetConf)
if errors.Is(err, os.ErrInvalid) || errors.Is(err, os.ErrPermission) {
// newIpsetHandler returns a new initialized [ipsetHandler]. It is not safe for
// concurrent use.
func newIpsetHandler(
ctx context.Context,
logger *slog.Logger,
ipsetList []string,
) (h *ipsetHandler, err error) {
h = &ipsetHandler{
logger: logger,
}
conf := &ipset.Config{
Logger: logger,
Lines: ipsetList,
}
h.ipsetMgr, err = ipset.NewManager(ctx, conf)
if errors.Is(err, os.ErrInvalid) ||
errors.Is(err, os.ErrPermission) ||
errors.Is(err, errors.ErrUnsupported) {
// ipset cannot currently be initialized if the server was installed
// from Snap or when the user or the binary doesn't have the required
// permissions, or when the kernel doesn't support netfilter.
@ -31,30 +46,28 @@ func (c *ipsetCtx) init(ipsetConf []string) (err error) {
//
// TODO(a.garipov): The Snap problem can probably be solved if we add
// the netlink-connector interface plug.
log.Info("ipset: warning: cannot initialize: %s", err)
logger.WarnContext(ctx, "cannot initialize", slogutil.KeyError, err)
return nil
} else if errors.Is(err, errors.ErrUnsupported) {
log.Info("ipset: warning: %s", err)
return nil
return h, nil
} else if err != nil {
return fmt.Errorf("initializing ipset: %w", err)
return nil, fmt.Errorf("initializing ipset: %w", err)
}
return h, nil
}
// close closes the Linux Netfilter connections. close can be called on a nil
// handler.
func (h *ipsetHandler) close() (err error) {
if h != nil && h.ipsetMgr != nil {
return h.ipsetMgr.Close()
}
return nil
}
// close closes the Linux Netfilter connections.
func (c *ipsetCtx) close() (err error) {
if c.ipsetMgr != nil {
return c.ipsetMgr.Close()
}
return nil
}
func (c *ipsetCtx) dctxIsfilled(dctx *dnsContext) (ok bool) {
// dctxIsFilled returns true if dctx has enough information to process.
func dctxIsFilled(dctx *dnsContext) (ok bool) {
return dctx != nil &&
dctx.responseFromUpstream &&
dctx.proxyCtx != nil &&
@ -65,8 +78,8 @@ func (c *ipsetCtx) dctxIsfilled(dctx *dnsContext) (ok bool) {
// skipIpsetProcessing returns true when the ipset processing can be skipped for
// this request.
func (c *ipsetCtx) skipIpsetProcessing(dctx *dnsContext) (ok bool) {
if c == nil || c.ipsetMgr == nil || !c.dctxIsfilled(dctx) {
func (h *ipsetHandler) skipIpsetProcessing(dctx *dnsContext) (ok bool) {
if h == nil || h.ipsetMgr == nil || !dctxIsFilled(dctx) {
return true
}
@ -108,31 +121,31 @@ func ipsFromAnswer(ans []dns.RR) (ip4s, ip6s []net.IP) {
}
// process adds the resolved IP addresses to the domain's ipsets, if any.
func (c *ipsetCtx) process(dctx *dnsContext) (rc resultCode) {
log.Debug("dnsforward: ipset: started processing")
defer log.Debug("dnsforward: ipset: finished processing")
func (h *ipsetHandler) process(dctx *dnsContext) (rc resultCode) {
// TODO(s.chzhen): Use passed context.
ctx := context.TODO()
h.logger.DebugContext(ctx, "started processing")
defer h.logger.DebugContext(ctx, "finished processing")
if c.skipIpsetProcessing(dctx) {
if h.skipIpsetProcessing(dctx) {
return resultCodeSuccess
}
log.Debug("ipset: starting processing")
req := dctx.proxyCtx.Req
host := req.Question[0].Name
host = strings.TrimSuffix(host, ".")
host = strings.ToLower(host)
ip4s, ip6s := ipsFromAnswer(dctx.proxyCtx.Res.Answer)
n, err := c.ipsetMgr.Add(host, ip4s, ip6s)
n, err := h.ipsetMgr.Add(ctx, host, ip4s, ip6s)
if err != nil {
// Consider ipset errors non-critical to the request.
log.Error("dnsforward: ipset: adding host ips: %s", err)
h.logger.ErrorContext(ctx, "adding host ips", slogutil.KeyError, err)
return resultCodeSuccess
}
log.Debug("dnsforward: ipset: added %d new ipset entries", n)
h.logger.DebugContext(ctx, "added new ipset entries", "num", n)
return resultCodeSuccess
}

17
internal/dnsforward/ipset_internal_test.go
View file

@ -1,10 +1,12 @@
package dnsforward
import (
"context"
"net"
"testing"
"github.com/AdguardTeam/dnsproxy/proxy"
"github.com/AdguardTeam/golibs/logutil/slogutil"
"github.com/miekg/dns"
"github.com/stretchr/testify/assert"
)
@ -16,7 +18,7 @@ type fakeIpsetMgr struct {
}
// Add implements the aghnet.IpsetManager interface for *fakeIpsetMgr.
func (m *fakeIpsetMgr) Add(host string, ip4s, ip6s []net.IP) (n int, err error) {
func (m *fakeIpsetMgr) Add(_ context.Context, host string, ip4s, ip6s []net.IP) (n int, err error) {
m.ip4s = append(m.ip4s, ip4s...)
m.ip6s = append(m.ip6s, ip6s...)
@ -58,7 +60,9 @@ func TestIpsetCtx_process(t *testing.T) {
responseFromUpstream: true,
}
ictx := &ipsetCtx{}
ictx := &ipsetHandler{
logger: slogutil.NewDiscardLogger(),
}
rc := ictx.process(dctx)
assert.Equal(t, resultCodeSuccess, rc)
@ -77,8 +81,9 @@ func TestIpsetCtx_process(t *testing.T) {
}
m := &fakeIpsetMgr{}
ictx := &ipsetCtx{
ictx := &ipsetHandler{
ipsetMgr: m,
logger: slogutil.NewDiscardLogger(),
}
rc := ictx.process(dctx)
@ -101,8 +106,9 @@ func TestIpsetCtx_process(t *testing.T) {
}
m := &fakeIpsetMgr{}
ictx := &ipsetCtx{
ictx := &ipsetHandler{
ipsetMgr: m,
logger: slogutil.NewDiscardLogger(),
}
rc := ictx.process(dctx)
@ -124,8 +130,9 @@ func TestIpsetCtx_SkipIpsetProcessing(t *testing.T) {
}
m := &fakeIpsetMgr{}
ictx := &ipsetCtx{
ictx := &ipsetHandler{
ipsetMgr: m,
logger: slogutil.NewDiscardLogger(),
}
testCases := []struct {

35
internal/ipset/ipset.go
View file

@ -2,6 +2,8 @@
package ipset
import (
"context"
"log/slog"
"net"
)
@ -10,24 +12,33 @@ import (
// TODO(a.garipov): Perhaps generalize this into some kind of a NetFilter type,
// since ipset is exclusive to Linux?
type Manager interface {
Add(host string, ip4s, ip6s []net.IP) (n int, err error)
Add(ctx context.Context, host string, ip4s, ip6s []net.IP) (n int, err error)
Close() (err error)
}
// NewManager returns a new ipset manager. IPv4 addresses are added to an
// ipset with an ipv4 family; IPv6 addresses, to an ipv6 ipset. ipset must
// exist.
// Config is the configuration structure for the ipset manager.
type Config struct {
// Logger is used for logging the operation of the ipset manager. It must
// not be nil.
Logger *slog.Logger
// Lines is the ipset configuration with the following syntax:
//
// DOMAIN[,DOMAIN].../IPSET_NAME[,IPSET_NAME]...
//
// Lines must not contain any blank lines or comments.
Lines []string
}
// NewManager returns a new ipset manager. IPv4 addresses are added to an ipset
// with an ipv4 family; IPv6 addresses, to an ipv6 ipset. ipset must exist.
//
// The syntax of the ipsetConf is:
//
// DOMAIN[,DOMAIN].../IPSET_NAME[,IPSET_NAME]...
//
// If ipsetConf is empty, msg and err are nil. The error's chain contains
// If conf.Lines is empty, mgr and err are nil. The error's chain contains
// [errors.ErrUnsupported] if current OS is not supported.
func NewManager(ipsetConf []string) (mgr Manager, err error) {
if len(ipsetConf) == 0 {
func NewManager(ctx context.Context, conf *Config) (mgr Manager, err error) {
if len(conf.Lines) == 0 {
return nil, nil
}
return newManager(ipsetConf)
return newManager(ctx, conf)
}

55
internal/ipset/ipset_linux.go
View file

@ -4,14 +4,16 @@ package ipset
import (
"bytes"
"context"
"fmt"
"log/slog"
"net"
"strings"
"sync"
"github.com/AdguardTeam/golibs/container"
"github.com/AdguardTeam/golibs/errors"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/golibs/logutil/slogutil"
"github.com/digineo/go-ipset/v2"
"github.com/mdlayher/netlink"
"github.com/ti-mo/netfilter"
@ -34,8 +36,8 @@ import (
// resolved IP addresses.
// newManager returns a new Linux ipset manager.
func newManager(ipsetConf []string) (set Manager, err error) {
return newManagerWithDialer(ipsetConf, defaultDial)
func newManager(ctx context.Context, conf *Config) (set Manager, err error) {
return newManagerWithDialer(ctx, conf, defaultDial)
}
// defaultDial is the default netfilter dialing function.
@ -180,6 +182,8 @@ type manager struct {
nameToIpset map[string]props
domainToIpsets map[string][]props
logger *slog.Logger
dial dialer
// mu protects all properties below.
@ -254,7 +258,7 @@ func parseIpsetConfigLine(confStr string) (hosts, ipsetNames []string, err error
// parseIpsetConfig parses the ipset configuration and stores ipsets. It
// returns an error if the configuration can't be used.
func (m *manager) parseIpsetConfig(ipsetConf []string) (err error) {
func (m *manager) parseIpsetConfig(ctx context.Context, ipsetConf []string) (err error) {
// The family doesn't seem to matter when we use a header query, so query
// only the IPv4 one.
//
@ -278,7 +282,7 @@ func (m *manager) parseIpsetConfig(ipsetConf []string) (err error) {
}
var ipsets []props
ipsets, err = m.ipsets(ipsetNames, currentlyKnown)
ipsets, err = m.ipsets(ctx, ipsetNames, currentlyKnown)
if err != nil {
return fmt.Errorf("getting ipsets from config line at idx %d: %w", i, err)
}
@ -328,7 +332,11 @@ func (m *manager) ipsetProps(name string) (p props, err error) {
// ipsets returns ipset properties of currently known ipsets. It also makes an
// additional ipset header data query if needed.
func (m *manager) ipsets(names []string, currentlyKnown map[string]props) (sets []props, err error) {
func (m *manager) ipsets(
ctx context.Context,
names []string,
currentlyKnown map[string]props,
) (sets []props, err error) {
for _, n := range names {
p, ok := currentlyKnown[n]
if !ok {
@ -336,10 +344,12 @@ func (m *manager) ipsets(names []string, currentlyKnown map[string]props) (sets
}
if p.family != netfilter.ProtoIPv4 && p.family != netfilter.ProtoIPv6 {
log.Debug("ipset: getting properties: %q %q unexpected ipset family %q",
p.name,
p.typeName,
p.family,
m.logger.DebugContext(
ctx,
"got unexpected ipset family while getting set properties",
"set_name", p.name,
"set_type", p.typeName,
"set_family", p.family,
)
p, err = m.ipsetProps(n)
@ -357,7 +367,7 @@ func (m *manager) ipsets(names []string, currentlyKnown map[string]props) (sets
// newManagerWithDialer returns a new Linux ipset manager using the provided
// dialer.
func newManagerWithDialer(ipsetConf []string, dial dialer) (mgr Manager, err error) {
func newManagerWithDialer(ctx context.Context, conf *Config, dial dialer) (mgr Manager, err error) {
defer func() { err = errors.Annotate(err, "ipset: %w") }()
m := &manager{
@ -366,6 +376,8 @@ func newManagerWithDialer(ipsetConf []string, dial dialer) (mgr Manager, err err
nameToIpset: make(map[string]props),
domainToIpsets: make(map[string][]props),
logger: conf.Logger,
dial: dial,
addedIPs: container.NewMapSet[ipInIpsetEntry](),
@ -376,7 +388,7 @@ func newManagerWithDialer(ipsetConf []string, dial dialer) (mgr Manager, err err
if errors.Is(err, unix.EPROTONOSUPPORT) {
// The implementation doesn't support this protocol version. Just
// issue a warning.
log.Info("ipset: dialing netfilter: warning: %s", err)
m.logger.WarnContext(ctx, "dialing netfilter", slogutil.KeyError, err)
return nil, nil
}
@ -384,12 +396,12 @@ func newManagerWithDialer(ipsetConf []string, dial dialer) (mgr Manager, err err
return nil, fmt.Errorf("dialing netfilter: %w", err)
}
err = m.parseIpsetConfig(ipsetConf)
err = m.parseIpsetConfig(ctx, conf.Lines)
if err != nil {
return nil, fmt.Errorf("getting ipsets: %w", err)
}
log.Debug("ipset: initialized")
m.logger.DebugContext(ctx, "initialized")
return m, nil
}
@ -476,6 +488,7 @@ func (m *manager) addIPs(host string, set props, ips []net.IP) (n int, err error
// addToSets adds the IP addresses to the corresponding ipset.
func (m *manager) addToSets(
ctx context.Context,
host string,
ip4s []net.IP,
ip6s []net.IP,
@ -498,7 +511,13 @@ func (m *manager) addToSets(
return n, fmt.Errorf("%q %q unexpected family %q", set.name, set.typeName, set.family)
}
log.Debug("ipset: added %d ips to set %q %q", nn, set.name, set.typeName)
m.logger.DebugContext(
ctx,
"added ips to set",
"ips_num", nn,
"set_name", set.name,
"set_type", set.typeName,
)
n += nn
}
@ -507,7 +526,7 @@ func (m *manager) addToSets(
}
// Add implements the [Manager] interface for *manager.
func (m *manager) Add(host string, ip4s, ip6s []net.IP) (n int, err error) {
func (m *manager) Add(ctx context.Context, host string, ip4s, ip6s []net.IP) (n int, err error) {
m.mu.Lock()
defer m.mu.Unlock()
@ -516,9 +535,9 @@ func (m *manager) Add(host string, ip4s, ip6s []net.IP) (n int, err error) {
return 0, nil
}
log.Debug("ipset: found %d sets", len(sets))
m.logger.DebugContext(ctx, "found sets", "set_num", len(sets))
return m.addToSets(host, ip4s, ip6s, sets)
return m.addToSets(ctx, host, ip4s, ip6s, sets)
}
// Close implements the [Manager] interface for *manager.

18
internal/ipset/ipset_linux_internal_test.go
View file

@ -6,8 +6,11 @@ import (
"net"
"strings"
"testing"
"time"
"github.com/AdguardTeam/golibs/errors"
"github.com/AdguardTeam/golibs/logutil/slogutil"
"github.com/AdguardTeam/golibs/testutil"
"github.com/digineo/go-ipset/v2"
"github.com/mdlayher/netlink"
"github.com/stretchr/testify/assert"
@ -15,6 +18,9 @@ import (
"github.com/ti-mo/netfilter"
)
// testTimeout is a common timeout for tests and contexts.
const testTimeout = 1 * time.Second
// fakeConn is a fake ipsetConn for tests.
type fakeConn struct {
ipv4Header *ipset.HeaderPolicy
@ -58,7 +64,7 @@ func (c *fakeConn) listAll() (sets []props, err error) {
}
func TestManager_Add(t *testing.T) {
ipsetConf := []string{
ipsetList := []string{
"example.com,example.net/ipv4set",
"example.org,example.biz/ipv6set",
}
@ -89,7 +95,11 @@ func TestManager_Add(t *testing.T) {
}, nil
}
m, err := newManagerWithDialer(ipsetConf, fakeDial)
conf := &Config{
Logger: slogutil.NewDiscardLogger(),
Lines: ipsetList,
}
m, err := newManagerWithDialer(testutil.ContextWithTimeout(t, testTimeout), conf, fakeDial)
require.NoError(t, err)
ip4 := net.IP{1, 2, 3, 4}
@ -100,7 +110,7 @@ func TestManager_Add(t *testing.T) {
0x00, 0x00, 0x56, 0x78,
}
n, err := m.Add("example.net", []net.IP{ip4}, nil)
n, err := m.Add(testutil.ContextWithTimeout(t, testTimeout), "example.net", []net.IP{ip4}, nil)
require.NoError(t, err)
assert.Equal(t, 1, n)
@ -110,7 +120,7 @@ func TestManager_Add(t *testing.T) {
gotIP4 := ipv4Entries[0].IP.Value
assert.Equal(t, ip4, gotIP4)
n, err = m.Add("example.biz", nil, []net.IP{ip6})
n, err = m.Add(testutil.ContextWithTimeout(t, testTimeout), "example.biz", nil, []net.IP{ip6})
require.NoError(t, err)
assert.Equal(t, 1, n)

4
internal/ipset/ipset_others.go
View file

@ -3,9 +3,11 @@
package ipset
import (
"context"
"github.com/AdguardTeam/AdGuardHome/internal/aghos"
)
func newManager(_ []string) (mgr Manager, err error) {
func newManager(_ context.Context, _ *Config) (mgr Manager, err error) {
return nil, aghos.Unsupported("ipset")
}