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Merge: * dnsforward: major refactoring 

* commit 'f579c23bc932e893ffa960abe769750fe657beff':
  * minor fixes
  * dnsforward: refactor code for default DNS servers logic
  * update tests
  * dnsforward: move access settings and web handlers
  + dnsforward: refactor
This commit is contained in:
Simon Zolin 2019-12-02 15:38:04 +03:00
parent 73d17ffa81 f579c23bc9
commit 31ffae7717
14 changed files with 701 additions and 658 deletions
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188
dnsforward/access.go Normal file
View File

@ -0,0 +1,188 @@
package dnsforward
import (
"encoding/json"
"net"
"net/http"
"sync"
"github.com/AdguardTeam/golibs/log"
)
type accessCtx struct {
lock sync.Mutex
allowedClients map[string]bool // IP addresses of whitelist clients
disallowedClients map[string]bool // IP addresses of clients that should be blocked
allowedClientsIPNet []net.IPNet // CIDRs of whitelist clients
disallowedClientsIPNet []net.IPNet // CIDRs of clients that should be blocked
blockedHosts map[string]bool // hosts that should be blocked
}
func (a *accessCtx) Init(allowedClients, disallowedClients, blockedHosts []string) error {
err := processIPCIDRArray(&a.allowedClients, &a.allowedClientsIPNet, allowedClients)
if err != nil {
return err
}
err = processIPCIDRArray(&a.disallowedClients, &a.disallowedClientsIPNet, disallowedClients)
if err != nil {
return err
}
convertArrayToMap(&a.blockedHosts, blockedHosts)
return nil
}
func convertArrayToMap(dst *map[string]bool, src []string) {
*dst = make(map[string]bool)
for _, s := range src {
(*dst)[s] = true
}
}
// Split array of IP or CIDR into 2 containers for fast search
func processIPCIDRArray(dst *map[string]bool, dstIPNet *[]net.IPNet, src []string) error {
*dst = make(map[string]bool)
for _, s := range src {
ip := net.ParseIP(s)
if ip != nil {
(*dst)[s] = true
continue
}
_, ipnet, err := net.ParseCIDR(s)
if err != nil {
return err
}
*dstIPNet = append(*dstIPNet, *ipnet)
}
return nil
}
// IsBlockedIP - return TRUE if this client should be blocked
func (a *accessCtx) IsBlockedIP(ip string) bool {
a.lock.Lock()
defer a.lock.Unlock()
if len(a.allowedClients) != 0 || len(a.allowedClientsIPNet) != 0 {
_, ok := a.allowedClients[ip]
if ok {
return false
}
if len(a.allowedClientsIPNet) != 0 {
ipAddr := net.ParseIP(ip)
for _, ipnet := range a.allowedClientsIPNet {
if ipnet.Contains(ipAddr) {
return false
}
}
}
return true
}
_, ok := a.disallowedClients[ip]
if ok {
return true
}
if len(a.disallowedClientsIPNet) != 0 {
ipAddr := net.ParseIP(ip)
for _, ipnet := range a.disallowedClientsIPNet {
if ipnet.Contains(ipAddr) {
return true
}
}
}
return false
}
// IsBlockedDomain - return TRUE if this domain should be blocked
func (a *accessCtx) IsBlockedDomain(host string) bool {
a.lock.Lock()
_, ok := a.blockedHosts[host]
a.lock.Unlock()
return ok
}
type accessListJSON struct {
AllowedClients []string `json:"allowed_clients"`
DisallowedClients []string `json:"disallowed_clients"`
BlockedHosts []string `json:"blocked_hosts"`
}
func (s *Server) handleAccessList(w http.ResponseWriter, r *http.Request) {
s.Lock()
j := accessListJSON{
AllowedClients: s.conf.AllowedClients,
DisallowedClients: s.conf.DisallowedClients,
BlockedHosts: s.conf.BlockedHosts,
}
s.Unlock()
w.Header().Set("Content-Type", "application/json")
err := json.NewEncoder(w).Encode(j)
if err != nil {
httpError(r, w, http.StatusInternalServerError, "json.Encode: %s", err)
return
}
}
func checkIPCIDRArray(src []string) error {
for _, s := range src {
ip := net.ParseIP(s)
if ip != nil {
continue
}
_, _, err := net.ParseCIDR(s)
if err != nil {
return err
}
}
return nil
}
func (s *Server) handleAccessSet(w http.ResponseWriter, r *http.Request) {
j := accessListJSON{}
err := json.NewDecoder(r.Body).Decode(&j)
if err != nil {
httpError(r, w, http.StatusBadRequest, "json.Decode: %s", err)
return
}
err = checkIPCIDRArray(j.AllowedClients)
if err == nil {
err = checkIPCIDRArray(j.DisallowedClients)
}
if err != nil {
httpError(r, w, http.StatusBadRequest, "%s", err)
return
}
a := &accessCtx{}
err = a.Init(j.AllowedClients, j.DisallowedClients, j.BlockedHosts)
if err != nil {
httpError(r, w, http.StatusBadRequest, "access.Init: %s", err)
return
}
s.Lock()
s.conf.AllowedClients = j.AllowedClients
s.conf.DisallowedClients = j.DisallowedClients
s.conf.BlockedHosts = j.BlockedHosts
s.access = a
s.Unlock()
s.conf.ConfigModified()
log.Debug("Access: updated lists: %d, %d, %d",
len(j.AllowedClients), len(j.DisallowedClients), len(j.BlockedHosts))
}

199
dnsforward/dnsforward.go
View File

@ -3,6 +3,7 @@ package dnsforward
import (
"crypto/tls"
"errors"
"fmt"
"net"
"net/http"
"runtime"
@ -28,6 +29,12 @@ const (
parentalBlockHost = "family-block.dns.adguard.com"
)
var defaultDNS = []string{
"https://1.1.1.1/dns-query",
"https://1.0.0.1/dns-query",
}
var defaultBootstrap = []string{"1.1.1.1", "1.0.0.1"}
// Server is the main way to start a DNS server.
//
// Example:
@ -43,12 +50,9 @@ type Server struct {
dnsFilter *dnsfilter.Dnsfilter // DNS filter instance
queryLog querylog.QueryLog // Query log instance
stats stats.Stats
access *accessCtx
AllowedClients map[string]bool // IP addresses of whitelist clients
DisallowedClients map[string]bool // IP addresses of clients that should be blocked
AllowedClientsIPNet []net.IPNet // CIDRs of whitelist clients
DisallowedClientsIPNet []net.IPNet // CIDRs of clients that should be blocked
BlockedHosts map[string]bool // hosts that should be blocked
webRegistered bool
sync.RWMutex
conf ServerConfig
@ -61,9 +65,15 @@ func NewServer(dnsFilter *dnsfilter.Dnsfilter, stats stats.Stats, queryLog query
s.dnsFilter = dnsFilter
s.stats = stats
s.queryLog = queryLog
if runtime.GOARCH == "mips" || runtime.GOARCH == "mipsle" {
// Use plain DNS on MIPS, encryption is too slow
defaultDNS = []string{"1.1.1.1", "1.0.0.1"}
}
return s
}
// Close - close object
func (s *Server) Close() {
s.Lock()
s.dnsFilter = nil
@ -72,20 +82,23 @@ func (s *Server) Close() {
s.Unlock()
}
// WriteDiskConfig - write configuration
func (s *Server) WriteDiskConfig(c *FilteringConfig) {
s.Lock()
*c = s.conf.FilteringConfig
s.Unlock()
}
// FilteringConfig represents the DNS filtering configuration of AdGuard Home
// The zero FilteringConfig is empty and ready for use.
type FilteringConfig struct {
// Filtering callback function
FilterHandler func(clientAddr string, settings *dnsfilter.RequestFilteringSettings) `yaml:"-"`
ProtectionEnabled bool `yaml:"protection_enabled"` // whether or not use any of dnsfilter features
FilteringEnabled bool `yaml:"filtering_enabled"` // whether or not use filter lists
FiltersUpdateIntervalHours uint32 `yaml:"filters_update_interval"` // time period to update filters (in hours)
ProtectionEnabled bool `yaml:"protection_enabled"` // whether or not use any of dnsfilter features
BlockingMode string `yaml:"blocking_mode"` // mode how to answer filtered requests
BlockedResponseTTL uint32 `yaml:"blocked_response_ttl"` // if 0, then default is used (3600)
QueryLogEnabled bool `yaml:"querylog_enabled"` // if true, query log is enabled
QueryLogInterval uint32 `yaml:"querylog_interval"` // time interval for query log (in days)
Ratelimit int `yaml:"ratelimit"` // max number of requests per second from a given IP (0 to disable)
RatelimitWhitelist []string `yaml:"ratelimit_whitelist"` // a list of whitelisted client IP addresses
RefuseAny bool `yaml:"refuse_any"` // if true, refuse ANY requests
@ -100,13 +113,8 @@ type FilteringConfig struct {
ParentalBlockHost string `yaml:"parental_block_host"`
SafeBrowsingBlockHost string `yaml:"safebrowsing_block_host"`
// Names of services to block (globally).
// Per-client settings can override this configuration.
BlockedServices []string `yaml:"blocked_services"`
CacheSize uint `yaml:"cache_size"` // DNS cache size (in bytes)
DnsfilterConf dnsfilter.Config `yaml:",inline"`
CacheSize uint `yaml:"cache_size"` // DNS cache size (in bytes)
UpstreamDNS []string `yaml:"upstream_dns"`
}
// TLSConfig is the TLS configuration for HTTPS, DNS-over-HTTPS, and DNS-over-TLS
@ -133,6 +141,12 @@ type ServerConfig struct {
FilteringConfig
TLSConfig
// Called when the configuration is changed by HTTP request
ConfigModified func()
// Register an HTTP handler
HTTPRegister func(string, string, func(http.ResponseWriter, *http.Request))
}
// if any of ServerConfig values are zero, then default values from below are used
@ -142,19 +156,6 @@ var defaultValues = ServerConfig{
FilteringConfig: FilteringConfig{BlockedResponseTTL: 3600},
}
func init() {
defaultDNS := []string{"8.8.8.8:53", "8.8.4.4:53"}
defaultUpstreams := make([]upstream.Upstream, 0)
for _, addr := range defaultDNS {
u, err := upstream.AddressToUpstream(addr, upstream.Options{Timeout: DefaultTimeout})
if err == nil {
defaultUpstreams = append(defaultUpstreams, u)
}
}
defaultValues.Upstreams = defaultUpstreams
}
// Start starts the DNS server
func (s *Server) Start(config *ServerConfig) error {
s.Lock()
@ -162,34 +163,6 @@ func (s *Server) Start(config *ServerConfig) error {
return s.startInternal(config)
}
func convertArrayToMap(dst *map[string]bool, src []string) {
*dst = make(map[string]bool)
for _, s := range src {
(*dst)[s] = true
}
}
// Split array of IP or CIDR into 2 containers for fast search
func processIPCIDRArray(dst *map[string]bool, dstIPNet *[]net.IPNet, src []string) error {
*dst = make(map[string]bool)
for _, s := range src {
ip := net.ParseIP(s)
if ip != nil {
(*dst)[s] = true
continue
}
_, ipnet, err := net.ParseCIDR(s)
if err != nil {
return err
}
*dstIPNet = append(*dstIPNet, *ipnet)
}
return nil
}
// startInternal starts without locking
func (s *Server) startInternal(config *ServerConfig) error {
if s.dnsProxy != nil {
@ -199,12 +172,33 @@ func (s *Server) startInternal(config *ServerConfig) error {
if config != nil {
s.conf = *config
}
if len(s.conf.UpstreamDNS) == 0 {
s.conf.UpstreamDNS = defaultDNS
}
if len(s.conf.BootstrapDNS) == 0 {
s.conf.BootstrapDNS = defaultBootstrap
}
upstreamConfig, err := proxy.ParseUpstreamsConfig(s.conf.UpstreamDNS, s.conf.BootstrapDNS, DefaultTimeout)
if err != nil {
return fmt.Errorf("DNS: proxy.ParseUpstreamsConfig: %s", err)
}
s.conf.Upstreams = upstreamConfig.Upstreams
s.conf.DomainsReservedUpstreams = upstreamConfig.DomainReservedUpstreams
if len(s.conf.ParentalBlockHost) == 0 {
s.conf.ParentalBlockHost = parentalBlockHost
}
if len(s.conf.SafeBrowsingBlockHost) == 0 {
s.conf.SafeBrowsingBlockHost = safeBrowsingBlockHost
}
if s.conf.UDPListenAddr == nil {
s.conf.UDPListenAddr = defaultValues.UDPListenAddr
}
if s.conf.TCPListenAddr == nil {
s.conf.TCPListenAddr = defaultValues.TCPListenAddr
}
proxyConfig := proxy.Config{
UDPListenAddr: s.conf.UDPListenAddr,
@ -221,18 +215,12 @@ func (s *Server) startInternal(config *ServerConfig) error {
AllServers: s.conf.AllServers,
}
err := processIPCIDRArray(&s.AllowedClients, &s.AllowedClientsIPNet, s.conf.AllowedClients)
s.access = &accessCtx{}
err = s.access.Init(s.conf.AllowedClients, s.conf.DisallowedClients, s.conf.BlockedHosts)
if err != nil {
return err
}
err = processIPCIDRArray(&s.DisallowedClients, &s.DisallowedClientsIPNet, s.conf.DisallowedClients)
if err != nil {
return err
}
convertArrayToMap(&s.BlockedHosts, s.conf.BlockedHosts)
if s.conf.TLSListenAddr != nil && len(s.conf.CertificateChainData) != 0 && len(s.conf.PrivateKeyData) != 0 {
proxyConfig.TLSListenAddr = s.conf.TLSListenAddr
keypair, err := tls.X509KeyPair(s.conf.CertificateChainData, s.conf.PrivateKeyData)
@ -245,16 +233,13 @@ func (s *Server) startInternal(config *ServerConfig) error {
}
}
if proxyConfig.UDPListenAddr == nil {
proxyConfig.UDPListenAddr = defaultValues.UDPListenAddr
}
if proxyConfig.TCPListenAddr == nil {
proxyConfig.TCPListenAddr = defaultValues.TCPListenAddr
}
if len(proxyConfig.Upstreams) == 0 {
proxyConfig.Upstreams = defaultValues.Upstreams
log.Fatal("len(proxyConfig.Upstreams) == 0")
}
if !s.webRegistered && s.conf.HTTPRegister != nil {
s.webRegistered = true
s.registerHandlers()
}
// Initialize and start the DNS proxy
@ -293,6 +278,23 @@ func (s *Server) IsRunning() bool {
return isRunning
}
// Restart - restart server
func (s *Server) Restart() error {
s.Lock()
defer s.Unlock()
log.Print("Start reconfiguring the server")
err := s.stopInternal()
if err != nil {
return errorx.Decorate(err, "could not reconfigure the server")
}
err = s.startInternal(nil)
if err != nil {
return errorx.Decorate(err, "could not reconfigure the server")
}
return nil
}
// Reconfigure applies the new configuration to the DNS server
func (s *Server) Reconfigure(config *ServerConfig) error {
s.Lock()
@ -324,59 +326,16 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
s.RUnlock()
}
// Return TRUE if this client should be blocked
func (s *Server) isBlockedIP(ip string) bool {
if len(s.AllowedClients) != 0 || len(s.AllowedClientsIPNet) != 0 {
_, ok := s.AllowedClients[ip]
if ok {
return false
}
if len(s.AllowedClientsIPNet) != 0 {
ipAddr := net.ParseIP(ip)
for _, ipnet := range s.AllowedClientsIPNet {
if ipnet.Contains(ipAddr) {
return false
}
}
}
return true
}
_, ok := s.DisallowedClients[ip]
if ok {
return true
}
if len(s.DisallowedClientsIPNet) != 0 {
ipAddr := net.ParseIP(ip)
for _, ipnet := range s.DisallowedClientsIPNet {
if ipnet.Contains(ipAddr) {
return true
}
}
}
return false
}
// Return TRUE if this domain should be blocked
func (s *Server) isBlockedDomain(host string) bool {
_, ok := s.BlockedHosts[host]
return ok
}
func (s *Server) beforeRequestHandler(p *proxy.Proxy, d *proxy.DNSContext) (bool, error) {
ip, _, _ := net.SplitHostPort(d.Addr.String())
if s.isBlockedIP(ip) {
if s.access.IsBlockedIP(ip) {
log.Tracef("Client IP %s is blocked by settings", ip)
return false, nil
}
if len(d.Req.Question) == 1 {
host := strings.TrimSuffix(d.Req.Question[0].Name, ".")
if s.isBlockedDomain(host) {
if s.access.IsBlockedDomain(host) {
log.Tracef("Domain %s is blocked by settings", host)
return false, nil
}

281
dnsforward/dnsforward_http.go Normal file
View File

@ -0,0 +1,281 @@
package dnsforward
import (
"encoding/json"
"fmt"
"net"
"net/http"
"strconv"
"strings"
"github.com/AdguardTeam/dnsproxy/upstream"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/golibs/utils"
"github.com/miekg/dns"
)
func httpError(r *http.Request, w http.ResponseWriter, code int, format string, args ...interface{}) {
text := fmt.Sprintf(format, args...)
log.Info("DNS: %s %s: %s", r.Method, r.URL, text)
http.Error(w, text, code)
}
func (s *Server) handleProtectionEnable(w http.ResponseWriter, r *http.Request) {
s.conf.ProtectionEnabled = true
s.conf.ConfigModified()
}
func (s *Server) handleProtectionDisable(w http.ResponseWriter, r *http.Request) {
s.conf.ProtectionEnabled = false
s.conf.ConfigModified()
}
type upstreamJSON struct {
Upstreams []string `json:"upstream_dns"` // Upstreams
BootstrapDNS []string `json:"bootstrap_dns"` // Bootstrap DNS
AllServers bool `json:"all_servers"` // --all-servers param for dnsproxy
}
func (s *Server) handleSetUpstreamConfig(w http.ResponseWriter, r *http.Request) {
req := upstreamJSON{}
err := json.NewDecoder(r.Body).Decode(&req)
if err != nil {
httpError(r, w, http.StatusBadRequest, "Failed to parse new upstreams config json: %s", err)
return
}
err = validateUpstreams(req.Upstreams)
if err != nil {
httpError(r, w, http.StatusBadRequest, "wrong upstreams specification: %s", err)
return
}
newconf := FilteringConfig{}
newconf.UpstreamDNS = req.Upstreams
// bootstrap servers are plain DNS only
for _, host := range req.BootstrapDNS {
if err := checkPlainDNS(host); err != nil {
httpError(r, w, http.StatusBadRequest, "%s can not be used as bootstrap dns cause: %s", host, err)
return
}
}
newconf.BootstrapDNS = req.BootstrapDNS
newconf.AllServers = req.AllServers
s.Lock()
s.conf.UpstreamDNS = newconf.UpstreamDNS
s.conf.BootstrapDNS = newconf.BootstrapDNS
s.conf.AllServers = newconf.AllServers
s.Unlock()
s.conf.ConfigModified()
err = s.Restart()
if err != nil {
httpError(r, w, http.StatusInternalServerError, "%s", err)
return
}
}
// validateUpstreams validates each upstream and returns an error if any upstream is invalid or if there are no default upstreams specified
func validateUpstreams(upstreams []string) error {
var defaultUpstreamFound bool
for _, u := range upstreams {
d, err := validateUpstream(u)
if err != nil {
return err
}
// Check this flag until default upstream will not be found
if !defaultUpstreamFound {
defaultUpstreamFound = d
}
}
// Return error if there are no default upstreams
if !defaultUpstreamFound {
return fmt.Errorf("no default upstreams specified")
}
return nil
}
var protocols = []string{"tls://", "https://", "tcp://", "sdns://"}
func validateUpstream(u string) (bool, error) {
// Check if user tries to specify upstream for domain
u, defaultUpstream, err := separateUpstream(u)
if err != nil {
return defaultUpstream, err
}
// The special server address '#' means "use the default servers"
if u == "#" && !defaultUpstream {
return defaultUpstream, nil
}
// Check if the upstream has a valid protocol prefix
for _, proto := range protocols {
if strings.HasPrefix(u, proto) {
return defaultUpstream, nil
}
}
// Return error if the upstream contains '://' without any valid protocol
if strings.Contains(u, "://") {
return defaultUpstream, fmt.Errorf("wrong protocol")
}
// Check if upstream is valid plain DNS
return defaultUpstream, checkPlainDNS(u)
}
// separateUpstream returns upstream without specified domains and a bool flag that indicates if no domains were specified
// error will be returned if upstream per domain specification is invalid
func separateUpstream(upstream string) (string, bool, error) {
defaultUpstream := true
if strings.HasPrefix(upstream, "[/") {
defaultUpstream = false
// split domains and upstream string
domainsAndUpstream := strings.Split(strings.TrimPrefix(upstream, "[/"), "/]")
if len(domainsAndUpstream) != 2 {
return "", defaultUpstream, fmt.Errorf("wrong DNS upstream per domain specification: %s", upstream)
}
// split domains list and validate each one
for _, host := range strings.Split(domainsAndUpstream[0], "/") {
if host != "" {
if err := utils.IsValidHostname(host); err != nil {
return "", defaultUpstream, err
}
}
}
upstream = domainsAndUpstream[1]
}
return upstream, defaultUpstream, nil
}
// checkPlainDNS checks if host is plain DNS
func checkPlainDNS(upstream string) error {
// Check if host is ip without port
if net.ParseIP(upstream) != nil {
return nil
}
// Check if host is ip with port
ip, port, err := net.SplitHostPort(upstream)
if err != nil {
return err
}
if net.ParseIP(ip) == nil {
return fmt.Errorf("%s is not a valid IP", ip)
}
_, err = strconv.ParseInt(port, 0, 64)
if err != nil {
return fmt.Errorf("%s is not a valid port: %s", port, err)
}
return nil
}
func (s *Server) handleTestUpstreamDNS(w http.ResponseWriter, r *http.Request) {
req := upstreamJSON{}
err := json.NewDecoder(r.Body).Decode(&req)
if err != nil {
httpError(r, w, http.StatusBadRequest, "Failed to read request body: %s", err)
return
}
if len(req.Upstreams) == 0 {
httpError(r, w, http.StatusBadRequest, "No servers specified")
return
}
result := map[string]string{}
for _, host := range req.Upstreams {
err = checkDNS(host, req.BootstrapDNS)
if err != nil {
log.Info("%v", err)
result[host] = err.Error()
} else {
result[host] = "OK"
}
}
jsonVal, err := json.Marshal(result)
if err != nil {
httpError(r, w, http.StatusInternalServerError, "Unable to marshal status json: %s", err)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(jsonVal)
if err != nil {
httpError(r, w, http.StatusInternalServerError, "Couldn't write body: %s", err)
return
}
}
func checkDNS(input string, bootstrap []string) error {
// separate upstream from domains list
input, defaultUpstream, err := separateUpstream(input)
if err != nil {
return fmt.Errorf("wrong upstream format: %s", err)
}
// No need to check this entrance
if input == "#" && !defaultUpstream {
return nil
}
if _, err := validateUpstream(input); err != nil {
return fmt.Errorf("wrong upstream format: %s", err)
}
if len(bootstrap) == 0 {
bootstrap = defaultBootstrap
}
log.Debug("Checking if DNS %s works...", input)
u, err := upstream.AddressToUpstream(input, upstream.Options{Bootstrap: bootstrap, Timeout: DefaultTimeout})
if err != nil {
return fmt.Errorf("failed to choose upstream for %s: %s", input, err)
}
req := dns.Msg{}
req.Id = dns.Id()
req.RecursionDesired = true
req.Question = []dns.Question{
{Name: "google-public-dns-a.google.com.", Qtype: dns.TypeA, Qclass: dns.ClassINET},
}
reply, err := u.Exchange(&req)
if err != nil {
return fmt.Errorf("couldn't communicate with DNS server %s: %s", input, err)
}
if len(reply.Answer) != 1 {
return fmt.Errorf("DNS server %s returned wrong answer", input)
}
if t, ok := reply.Answer[0].(*dns.A); ok {
if !net.IPv4(8, 8, 8, 8).Equal(t.A) {
return fmt.Errorf("DNS server %s returned wrong answer: %v", input, t.A)
}
}
log.Debug("DNS %s works OK", input)
return nil
}
func (s *Server) registerHandlers() {
s.conf.HTTPRegister("POST", "/control/enable_protection", s.handleProtectionEnable)
s.conf.HTTPRegister("POST", "/control/disable_protection", s.handleProtectionDisable)
s.conf.HTTPRegister("POST", "/control/set_upstreams_config", s.handleSetUpstreamConfig)
s.conf.HTTPRegister("POST", "/control/test_upstream_dns", s.handleTestUpstreamDNS)
s.conf.HTTPRegister("GET", "/control/access/list", s.handleAccessList)
s.conf.HTTPRegister("POST", "/control/access/set", s.handleAccessSet)
}

141
dnsforward/dnsforward_test.go
View File

@ -17,6 +17,7 @@ import (
"github.com/AdguardTeam/AdGuardHome/dnsfilter"
"github.com/AdguardTeam/dnsproxy/proxy"
"github.com/miekg/dns"
"github.com/stretchr/testify/assert"
)
const (
@ -390,8 +391,7 @@ func createTestServer(t *testing.T) *Server {
s := NewServer(f, nil, nil)
s.conf.UDPListenAddr = &net.UDPAddr{Port: 0}
s.conf.TCPListenAddr = &net.TCPAddr{Port: 0}
s.conf.FilteringConfig.FilteringEnabled = true
s.conf.UpstreamDNS = []string{"8.8.8.8:53", "8.8.4.4:53"}
s.conf.FilteringConfig.ProtectionEnabled = true
return s
}
@ -541,67 +541,106 @@ func publicKey(priv interface{}) interface{} {
}
func TestIsBlockedIPAllowed(t *testing.T) {
s := createTestServer(t)
s.conf.AllowedClients = []string{"1.1.1.1", "2.2.0.0/16"}
a := &accessCtx{}
assert.True(t, a.Init([]string{"1.1.1.1", "2.2.0.0/16"}, nil, nil) == nil)
err := s.Start(nil)
if err != nil {
t.Fatalf("Failed to start server: %s", err)
}
if s.isBlockedIP("1.1.1.1") {
t.Fatalf("isBlockedIP")
}
if !s.isBlockedIP("1.1.1.2") {
t.Fatalf("isBlockedIP")
}
if s.isBlockedIP("2.2.1.1") {
t.Fatalf("isBlockedIP")
}
if !s.isBlockedIP("2.3.1.1") {
t.Fatalf("isBlockedIP")
}
assert.True(t, !a.IsBlockedIP("1.1.1.1"))
assert.True(t, a.IsBlockedIP("1.1.1.2"))
assert.True(t, !a.IsBlockedIP("2.2.1.1"))
assert.True(t, a.IsBlockedIP("2.3.1.1"))
}
func TestIsBlockedIPDisallowed(t *testing.T) {
s := createTestServer(t)
s.conf.DisallowedClients = []string{"1.1.1.1", "2.2.0.0/16"}
a := &accessCtx{}
assert.True(t, a.Init(nil, []string{"1.1.1.1", "2.2.0.0/16"}, nil) == nil)
err := s.Start(nil)
if err != nil {
t.Fatalf("Failed to start server: %s", err)
}
if !s.isBlockedIP("1.1.1.1") {
t.Fatalf("isBlockedIP")
}
if s.isBlockedIP("1.1.1.2") {
t.Fatalf("isBlockedIP")
}
if !s.isBlockedIP("2.2.1.1") {
t.Fatalf("isBlockedIP")
}
if s.isBlockedIP("2.3.1.1") {
t.Fatalf("isBlockedIP")
}
assert.True(t, a.IsBlockedIP("1.1.1.1"))
assert.True(t, !a.IsBlockedIP("1.1.1.2"))
assert.True(t, a.IsBlockedIP("2.2.1.1"))
assert.True(t, !a.IsBlockedIP("2.3.1.1"))
}
func TestIsBlockedIPBlockedDomain(t *testing.T) {
s := createTestServer(t)
s.conf.BlockedHosts = []string{"host1", "host2"}
a := &accessCtx{}
assert.True(t, a.Init(nil, nil, []string{"host1", "host2"}) == nil)
err := s.Start(nil)
if err != nil {
t.Fatalf("Failed to start server: %s", err)
assert.True(t, a.IsBlockedDomain("host1"))
assert.True(t, a.IsBlockedDomain("host2"))
assert.True(t, !a.IsBlockedDomain("host3"))
}
func TestValidateUpstream(t *testing.T) {
invalidUpstreams := []string{"1.2.3.4.5",
"123.3.7m",
"htttps://google.com/dns-query",
"[/host.com]tls://dns.adguard.com",
"[host.ru]#",
}
if !s.isBlockedDomain("host1") {
t.Fatalf("isBlockedDomain")
validDefaultUpstreams := []string{"1.1.1.1",
"tls://1.1.1.1",
"https://dns.adguard.com/dns-query",
"sdns://AQMAAAAAAAAAFDE3Ni4xMDMuMTMwLjEzMDo1NDQzINErR_JS3PLCu_iZEIbq95zkSV2LFsigxDIuUso_OQhzIjIuZG5zY3J5cHQuZGVmYXVsdC5uczEuYWRndWFyZC5jb20",
}
if !s.isBlockedDomain("host2") {
t.Fatalf("isBlockedDomain")
validUpstreams := []string{"[/host.com/]1.1.1.1",
"[//]tls://1.1.1.1",
"[/www.host.com/]#",
"[/host.com/google.com/]8.8.8.8",
"[/host/]sdns://AQMAAAAAAAAAFDE3Ni4xMDMuMTMwLjEzMDo1NDQzINErR_JS3PLCu_iZEIbq95zkSV2LFsigxDIuUso_OQhzIjIuZG5zY3J5cHQuZGVmYXVsdC5uczEuYWRndWFyZC5jb20",
}
if s.isBlockedDomain("host3") {
t.Fatalf("isBlockedDomain")
for _, u := range invalidUpstreams {
_, err := validateUpstream(u)
if err == nil {
t.Fatalf("upstream %s is invalid but it pass through validation", u)
}
}
for _, u := range validDefaultUpstreams {
defaultUpstream, err := validateUpstream(u)
if err != nil {
t.Fatalf("upstream %s is valid but it doen't pass through validation cause: %s", u, err)
}
if !defaultUpstream {
t.Fatalf("upstream %s is default one!", u)
}
}
for _, u := range validUpstreams {
defaultUpstream, err := validateUpstream(u)
if err != nil {
t.Fatalf("upstream %s is valid but it doen't pass through validation cause: %s", u, err)
}
if defaultUpstream {
t.Fatalf("upstream %s is default one!", u)
}
}
}
func TestValidateUpstreamsSet(t *testing.T) {
// Set of valid upstreams. There is no default upstream specified
upstreamsSet := []string{"[/host.com/]1.1.1.1",
"[//]tls://1.1.1.1",
"[/www.host.com/]#",
"[/host.com/google.com/]8.8.8.8",
"[/host/]sdns://AQMAAAAAAAAAFDE3Ni4xMDMuMTMwLjEzMDo1NDQzINErR_JS3PLCu_iZEIbq95zkSV2LFsigxDIuUso_OQhzIjIuZG5zY3J5cHQuZGVmYXVsdC5uczEuYWRndWFyZC5jb20",
}
err := validateUpstreams(upstreamsSet)
if err == nil {
t.Fatalf("there is no default upstream")
}
// Let's add default upstream
upstreamsSet = append(upstreamsSet, "8.8.8.8")
err = validateUpstreams(upstreamsSet)
if err != nil {
t.Fatalf("upstreams set is valid, but doesn't pass through validation cause: %s", err)
}
// Let's add invalid upstream
upstreamsSet = append(upstreamsSet, "dhcp://fake.dns")
err = validateUpstreams(upstreamsSet)
if err == nil {
t.Fatalf("there is an invalid upstream in set, but it pass through validation")
}
}

2
home/blocked_services.go
View File

@ -187,7 +187,7 @@ func handleBlockedServicesSet(w http.ResponseWriter, r *http.Request) {
return
}
returnOK(w)
httpOK(r, w)
}
// RegisterBlockedServicesHandlers - register HTTP handlers

9
home/clients_http.go
View File

@ -168,8 +168,7 @@ func (clients *clientsContainer) handleAddClient(w http.ResponseWriter, r *http.
return
}
_ = writeAllConfigsAndReloadDNS()
returnOK(w)
onConfigModified()
}
// Remove client
@ -192,8 +191,7 @@ func (clients *clientsContainer) handleDelClient(w http.ResponseWriter, r *http.
return
}
_ = writeAllConfigsAndReloadDNS()
returnOK(w)
onConfigModified()
}
type updateJSON struct {
@ -232,8 +230,7 @@ func (clients *clientsContainer) handleUpdateClient(w http.ResponseWriter, r *ht
return
}
_ = writeAllConfigsAndReloadDNS()
returnOK(w)
onConfigModified()
}
// Get the list of clients by IP address list

57
home/config.go
View File

@ -5,7 +5,6 @@ import (
"net/http"
"os"
"path/filepath"
"runtime"
"sync"
"time"
@ -105,16 +104,19 @@ type dnsConfig struct {
// time interval for statistics (in days)
StatsInterval uint32 `yaml:"statistics_interval"`
QueryLogEnabled bool `yaml:"querylog_enabled"` // if true, query log is enabled
QueryLogInterval uint32 `yaml:"querylog_interval"` // time interval for query log (in days)
dnsforward.FilteringConfig `yaml:",inline"`
UpstreamDNS []string `yaml:"upstream_dns"`
}
FilteringEnabled bool `yaml:"filtering_enabled"` // whether or not use filter lists
FiltersUpdateIntervalHours uint32 `yaml:"filters_update_interval"` // time period to update filters (in hours)
DnsfilterConf dnsfilter.Config `yaml:",inline"`
var defaultDNS = []string{
"https://1.1.1.1/dns-query",
"https://1.0.0.1/dns-query",
// Names of services to block (globally).
// Per-client settings can override this configuration.
BlockedServices []string `yaml:"blocked_services"`
}
var defaultBootstrap = []string{"1.1.1.1", "1.0.0.1"}
type tlsConfigSettings struct {
Enabled bool `yaml:"enabled" json:"enabled"` // Enabled is the encryption (DOT/DOH/HTTPS) status
@ -159,23 +161,21 @@ var config = configuration{
BindPort: 3000,
BindHost: "0.0.0.0",
DNS: dnsConfig{
BindHost: "0.0.0.0",
Port: 53,
StatsInterval: 1,
BindHost: "0.0.0.0",
Port: 53,
StatsInterval: 1,
QueryLogEnabled: true,
QueryLogInterval: 1,
FilteringConfig: dnsforward.FilteringConfig{
ProtectionEnabled: true, // whether or not use any of dnsfilter features
FilteringEnabled: true, // whether or not use filter lists
FiltersUpdateIntervalHours: 24,
BlockingMode: "nxdomain", // mode how to answer filtered requests
BlockedResponseTTL: 10, // in seconds
QueryLogEnabled: true,
QueryLogInterval: 1,
Ratelimit: 20,
RefuseAny: true,
BootstrapDNS: defaultBootstrap,
AllServers: false,
ProtectionEnabled: true, // whether or not use any of dnsfilter features
BlockingMode: "nxdomain", // mode how to answer filtered requests
BlockedResponseTTL: 10, // in seconds
Ratelimit: 20,
RefuseAny: true,
AllServers: false,
},
UpstreamDNS: defaultDNS,
FilteringEnabled: true, // whether or not use filter lists
FiltersUpdateIntervalHours: 24,
},
TLS: tlsConfig{
tlsConfigSettings: tlsConfigSettings{
@ -202,13 +202,6 @@ func initConfig() {
config.WebSessionTTLHours = 30 * 24
if runtime.GOARCH == "mips" || runtime.GOARCH == "mipsle" {
// Use plain DNS on MIPS, encryption is too slow
defaultDNS = []string{"1.1.1.1", "1.0.0.1"}
// also change the default config
config.DNS.UpstreamDNS = defaultDNS
}
config.DNS.CacheSize = 4 * 1024 * 1024
config.DNS.DnsfilterConf.SafeBrowsingCacheSize = 1 * 1024 * 1024
config.DNS.DnsfilterConf.SafeSearchCacheSize = 1 * 1024 * 1024
@ -325,6 +318,12 @@ func (c *configuration) write() error {
config.DNS.DnsfilterConf = c
}
if config.dnsServer != nil {
c := dnsforward.FilteringConfig{}
config.dnsServer.WriteDiskConfig(&c)
config.DNS.FilteringConfig = c
}
if config.dhcpServer != nil {
c := dhcpd.ServerConfig{}
config.dhcpServer.WriteDiskConfig(&c)

296
home/control.go
View File

@ -3,21 +3,13 @@ package home
import (
"encoding/json"
"fmt"
"net"
"net/http"
"strconv"
"strings"
"github.com/AdguardTeam/AdGuardHome/dnsforward"
"github.com/AdguardTeam/dnsproxy/upstream"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/golibs/utils"
"github.com/NYTimes/gziphandler"
"github.com/miekg/dns"
)
var protocols = []string{"tls://", "https://", "tcp://", "sdns://"}
// ----------------
// helper functions
// ----------------
@ -29,6 +21,9 @@ func returnOK(w http.ResponseWriter) {
}
}
func httpOK(r *http.Request, w http.ResponseWriter) {
}
func httpError(w http.ResponseWriter, code int, format string, args ...interface{}) {
text := fmt.Sprintf(format, args...)
log.Info(text)
@ -47,15 +42,6 @@ func writeAllConfigsAndReloadDNS() error {
return reconfigureDNSServer()
}
func httpUpdateConfigReloadDNSReturnOK(w http.ResponseWriter, r *http.Request) {
err := writeAllConfigsAndReloadDNS()
if err != nil {
httpError(w, http.StatusInternalServerError, "Couldn't write config file: %s", err)
return
}
returnOK(w)
}
func addDNSAddress(dnsAddresses *[]string, addr string) {
if config.DNS.Port != 53 {
addr = fmt.Sprintf("%s:%d", addr, config.DNS.Port)
@ -106,17 +92,22 @@ func getDNSAddresses() []string {
}
func handleStatus(w http.ResponseWriter, r *http.Request) {
c := dnsforward.FilteringConfig{}
if config.dnsServer != nil {
config.dnsServer.WriteDiskConfig(&c)
}
data := map[string]interface{}{
"dns_addresses": getDNSAddresses(),
"http_port": config.BindPort,
"dns_port": config.DNS.Port,
"protection_enabled": config.DNS.ProtectionEnabled,
"running": isRunning(),
"bootstrap_dns": config.DNS.BootstrapDNS,
"upstream_dns": config.DNS.UpstreamDNS,
"all_servers": config.DNS.AllServers,
"version": versionString,
"language": config.Language,
"dns_addresses": getDNSAddresses(),
"http_port": config.BindPort,
"dns_port": config.DNS.Port,
"running": isRunning(),
"version": versionString,
"language": config.Language,
"protection_enabled": c.ProtectionEnabled,
"bootstrap_dns": c.BootstrapDNS,
"upstream_dns": c.UpstreamDNS,
"all_servers": c.AllServers,
}
jsonVal, err := json.Marshal(data)
@ -132,251 +123,6 @@ func handleStatus(w http.ResponseWriter, r *http.Request) {
}
}
func handleProtectionEnable(w http.ResponseWriter, r *http.Request) {
config.DNS.ProtectionEnabled = true
httpUpdateConfigReloadDNSReturnOK(w, r)
}
func handleProtectionDisable(w http.ResponseWriter, r *http.Request) {
config.DNS.ProtectionEnabled = false
httpUpdateConfigReloadDNSReturnOK(w, r)
}
// -----------------------
// upstreams configuration
// -----------------------
// TODO this struct will become unnecessary after config file rework
type upstreamConfig struct {
Upstreams []string `json:"upstream_dns"` // Upstreams
BootstrapDNS []string `json:"bootstrap_dns"` // Bootstrap DNS
AllServers bool `json:"all_servers"` // --all-servers param for dnsproxy
}
func handleSetUpstreamConfig(w http.ResponseWriter, r *http.Request) {
newconfig := upstreamConfig{}
err := json.NewDecoder(r.Body).Decode(&newconfig)
if err != nil {
httpError(w, http.StatusBadRequest, "Failed to parse new upstreams config json: %s", err)
return
}
err = validateUpstreams(newconfig.Upstreams)
if err != nil {
httpError(w, http.StatusBadRequest, "wrong upstreams specification: %s", err)
return
}
config.DNS.UpstreamDNS = defaultDNS
if len(newconfig.Upstreams) > 0 {
config.DNS.UpstreamDNS = newconfig.Upstreams
}
// bootstrap servers are plain DNS only.
for _, host := range newconfig.BootstrapDNS {
if err := checkPlainDNS(host); err != nil {
httpError(w, http.StatusBadRequest, "%s can not be used as bootstrap dns cause: %s", host, err)
return
}
}
config.DNS.BootstrapDNS = defaultBootstrap
if len(newconfig.BootstrapDNS) > 0 {
config.DNS.BootstrapDNS = newconfig.BootstrapDNS
}
config.DNS.AllServers = newconfig.AllServers
httpUpdateConfigReloadDNSReturnOK(w, r)
}
// validateUpstreams validates each upstream and returns an error if any upstream is invalid or if there are no default upstreams specified
func validateUpstreams(upstreams []string) error {
var defaultUpstreamFound bool
for _, u := range upstreams {
d, err := validateUpstream(u)
if err != nil {
return err
}
// Check this flag until default upstream will not be found
if !defaultUpstreamFound {
defaultUpstreamFound = d
}
}
// Return error if there are no default upstreams
if !defaultUpstreamFound {
return fmt.Errorf("no default upstreams specified")
}
return nil
}
func validateUpstream(u string) (bool, error) {
// Check if user tries to specify upstream for domain
u, defaultUpstream, err := separateUpstream(u)
if err != nil {
return defaultUpstream, err
}
// The special server address '#' means "use the default servers"
if u == "#" && !defaultUpstream {
return defaultUpstream, nil
}
// Check if the upstream has a valid protocol prefix
for _, proto := range protocols {
if strings.HasPrefix(u, proto) {
return defaultUpstream, nil
}
}
// Return error if the upstream contains '://' without any valid protocol
if strings.Contains(u, "://") {
return defaultUpstream, fmt.Errorf("wrong protocol")
}
// Check if upstream is valid plain DNS
return defaultUpstream, checkPlainDNS(u)
}
// separateUpstream returns upstream without specified domains and a bool flag that indicates if no domains were specified
// error will be returned if upstream per domain specification is invalid
func separateUpstream(upstream string) (string, bool, error) {
defaultUpstream := true
if strings.HasPrefix(upstream, "[/") {
defaultUpstream = false
// split domains and upstream string
domainsAndUpstream := strings.Split(strings.TrimPrefix(upstream, "[/"), "/]")
if len(domainsAndUpstream) != 2 {
return "", defaultUpstream, fmt.Errorf("wrong DNS upstream per domain specification: %s", upstream)
}
// split domains list and validate each one
for _, host := range strings.Split(domainsAndUpstream[0], "/") {
if host != "" {
if err := utils.IsValidHostname(host); err != nil {
return "", defaultUpstream, err
}
}
}
upstream = domainsAndUpstream[1]
}
return upstream, defaultUpstream, nil
}
// checkPlainDNS checks if host is plain DNS
func checkPlainDNS(upstream string) error {
// Check if host is ip without port
if net.ParseIP(upstream) != nil {
return nil
}
// Check if host is ip with port
ip, port, err := net.SplitHostPort(upstream)
if err != nil {
return err
}
if net.ParseIP(ip) == nil {
return fmt.Errorf("%s is not a valid IP", ip)
}
_, err = strconv.ParseInt(port, 0, 64)
if err != nil {
return fmt.Errorf("%s is not a valid port: %s", port, err)
}
return nil
}
func handleTestUpstreamDNS(w http.ResponseWriter, r *http.Request) {
upstreamConfig := upstreamConfig{}
err := json.NewDecoder(r.Body).Decode(&upstreamConfig)
if err != nil {
httpError(w, http.StatusBadRequest, "Failed to read request body: %s", err)
return
}
if len(upstreamConfig.Upstreams) == 0 {
httpError(w, http.StatusBadRequest, "No servers specified")
return
}
result := map[string]string{}
for _, host := range upstreamConfig.Upstreams {
err = checkDNS(host, upstreamConfig.BootstrapDNS)
if err != nil {
log.Info("%v", err)
result[host] = err.Error()
} else {
result[host] = "OK"
}
}
jsonVal, err := json.Marshal(result)
if err != nil {
httpError(w, http.StatusInternalServerError, "Unable to marshal status json: %s", err)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(jsonVal)
if err != nil {
httpError(w, http.StatusInternalServerError, "Couldn't write body: %s", err)
}
}
func checkDNS(input string, bootstrap []string) error {
// separate upstream from domains list
input, defaultUpstream, err := separateUpstream(input)
if err != nil {
return fmt.Errorf("wrong upstream format: %s", err)
}
// No need to check this entrance
if input == "#" && !defaultUpstream {
return nil
}
if _, err := validateUpstream(input); err != nil {
return fmt.Errorf("wrong upstream format: %s", err)
}
if len(bootstrap) == 0 {
bootstrap = defaultBootstrap
}
log.Debug("Checking if DNS %s works...", input)
u, err := upstream.AddressToUpstream(input, upstream.Options{Bootstrap: bootstrap, Timeout: dnsforward.DefaultTimeout})
if err != nil {
return fmt.Errorf("failed to choose upstream for %s: %s", input, err)
}
req := dns.Msg{}
req.Id = dns.Id()
req.RecursionDesired = true
req.Question = []dns.Question{
{Name: "google-public-dns-a.google.com.", Qtype: dns.TypeA, Qclass: dns.ClassINET},
}
reply, err := u.Exchange(&req)
if err != nil {
return fmt.Errorf("couldn't communicate with DNS server %s: %s", input, err)
}
if len(reply.Answer) != 1 {
return fmt.Errorf("DNS server %s returned wrong answer", input)
}
if t, ok := reply.Answer[0].(*dns.A); ok {
if !net.IPv4(8, 8, 8, 8).Equal(t.A) {
return fmt.Errorf("DNS server %s returned wrong answer: %v", input, t.A)
}
}
log.Debug("DNS %s works OK", input)
return nil
}
type profileJSON struct {
Name string `json:"name"`
}
@ -416,17 +162,11 @@ func handleDOH(w http.ResponseWriter, r *http.Request) {
// ------------------------
func registerControlHandlers() {
httpRegister(http.MethodGet, "/control/status", handleStatus)
httpRegister(http.MethodPost, "/control/enable_protection", handleProtectionEnable)
httpRegister(http.MethodPost, "/control/disable_protection", handleProtectionDisable)
httpRegister(http.MethodPost, "/control/set_upstreams_config", handleSetUpstreamConfig)
httpRegister(http.MethodPost, "/control/test_upstream_dns", handleTestUpstreamDNS)
httpRegister(http.MethodPost, "/control/i18n/change_language", handleI18nChangeLanguage)
httpRegister(http.MethodGet, "/control/i18n/current_language", handleI18nCurrentLanguage)
http.HandleFunc("/control/version.json", postInstall(optionalAuth(handleGetVersionJSON)))
httpRegister(http.MethodPost, "/control/update", handleUpdate)
httpRegister(http.MethodGet, "/control/access/list", handleAccessList)
httpRegister(http.MethodPost, "/control/access/set", handleAccessSet)
httpRegister("GET", "/control/profile", handleGetProfile)
RegisterFilteringHandlers()

84
home/control_access.go
View File

@ -1,84 +0,0 @@
package home
import (
"encoding/json"
"net"
"net/http"
"github.com/AdguardTeam/golibs/log"
)
type accessListJSON struct {
AllowedClients []string `json:"allowed_clients"`
DisallowedClients []string `json:"disallowed_clients"`
BlockedHosts []string `json:"blocked_hosts"`
}
func handleAccessList(w http.ResponseWriter, r *http.Request) {
config.controlLock.Lock()
j := accessListJSON{
AllowedClients: config.DNS.AllowedClients,
DisallowedClients: config.DNS.DisallowedClients,
BlockedHosts: config.DNS.BlockedHosts,
}
config.controlLock.Unlock()
w.Header().Set("Content-Type", "application/json")
err := json.NewEncoder(w).Encode(j)
if err != nil {
httpError(w, http.StatusInternalServerError, "json.Encode: %s", err)
return
}
}
func checkIPCIDRArray(src []string) error {
for _, s := range src {
ip := net.ParseIP(s)
if ip != nil {
continue
}
_, _, err := net.ParseCIDR(s)
if err != nil {
return err
}
}
return nil
}
func handleAccessSet(w http.ResponseWriter, r *http.Request) {
j := accessListJSON{}
err := json.NewDecoder(r.Body).Decode(&j)
if err != nil {
httpError(w, http.StatusBadRequest, "json.Decode: %s", err)
return
}
err = checkIPCIDRArray(j.AllowedClients)
if err == nil {
err = checkIPCIDRArray(j.DisallowedClients)
}
if err != nil {
httpError(w, http.StatusBadRequest, "%s", err)
return
}
config.Lock()
config.DNS.AllowedClients = j.AllowedClients
config.DNS.DisallowedClients = j.DisallowedClients
config.DNS.BlockedHosts = j.BlockedHosts
config.Unlock()
log.Tracef("Update access lists: %d, %d, %d",
len(j.AllowedClients), len(j.DisallowedClients), len(j.BlockedHosts))
err = writeAllConfigsAndReloadDNS()
if err != nil {
httpError(w, http.StatusBadRequest, "%s", err)
return
}
returnOK(w)
}

9
home/control_filtering.go
View File

@ -172,7 +172,12 @@ func handleFilteringSetRules(w http.ResponseWriter, r *http.Request) {
}
config.UserRules = strings.Split(string(body), "\n")
_ = writeAllConfigs()
onConfigModified()
userFilter := userFilter()
err = userFilter.save()
if err != nil {
log.Error("Couldn't save the user filter: %s", err)
}
enableFilters(true)
}
@ -218,7 +223,7 @@ func handleFilteringStatus(w http.ResponseWriter, r *http.Request) {
RulesCount: uint32(f.RulesCount),
}
if f.LastUpdated.Second() != 0 {
if !f.LastUpdated.IsZero() {
fj.LastUpdated = f.LastUpdated.Format(time.RFC3339)
}

76
home/control_test.go
View File

@ -75,79 +75,3 @@ kXS9jgARhhiWXJrk
t.Fatalf("valid cert & priv key: validateCertificates(): %v", data)
}
}
func TestValidateUpstream(t *testing.T) {
invalidUpstreams := []string{"1.2.3.4.5",
"123.3.7m",
"htttps://google.com/dns-query",
"[/host.com]tls://dns.adguard.com",
"[host.ru]#",
}
validDefaultUpstreams := []string{"1.1.1.1",
"tls://1.1.1.1",
"https://dns.adguard.com/dns-query",
"sdns://AQMAAAAAAAAAFDE3Ni4xMDMuMTMwLjEzMDo1NDQzINErR_JS3PLCu_iZEIbq95zkSV2LFsigxDIuUso_OQhzIjIuZG5zY3J5cHQuZGVmYXVsdC5uczEuYWRndWFyZC5jb20",
}
validUpstreams := []string{"[/host.com/]1.1.1.1",
"[//]tls://1.1.1.1",
"[/www.host.com/]#",
"[/host.com/google.com/]8.8.8.8",
"[/host/]sdns://AQMAAAAAAAAAFDE3Ni4xMDMuMTMwLjEzMDo1NDQzINErR_JS3PLCu_iZEIbq95zkSV2LFsigxDIuUso_OQhzIjIuZG5zY3J5cHQuZGVmYXVsdC5uczEuYWRndWFyZC5jb20",
}
for _, u := range invalidUpstreams {
_, err := validateUpstream(u)
if err == nil {
t.Fatalf("upstream %s is invalid but it pass through validation", u)
}
}
for _, u := range validDefaultUpstreams {
defaultUpstream, err := validateUpstream(u)
if err != nil {
t.Fatalf("upstream %s is valid but it doen't pass through validation cause: %s", u, err)
}
if !defaultUpstream {
t.Fatalf("upstream %s is default one!", u)
}
}
for _, u := range validUpstreams {
defaultUpstream, err := validateUpstream(u)
if err != nil {
t.Fatalf("upstream %s is valid but it doen't pass through validation cause: %s", u, err)
}
if defaultUpstream {
t.Fatalf("upstream %s is default one!", u)
}
}
}
func TestValidateUpstreamsSet(t *testing.T) {
// Set of valid upstreams. There is no default upstream specified
upstreamsSet := []string{"[/host.com/]1.1.1.1",
"[//]tls://1.1.1.1",
"[/www.host.com/]#",
"[/host.com/google.com/]8.8.8.8",
"[/host/]sdns://AQMAAAAAAAAAFDE3Ni4xMDMuMTMwLjEzMDo1NDQzINErR_JS3PLCu_iZEIbq95zkSV2LFsigxDIuUso_OQhzIjIuZG5zY3J5cHQuZGVmYXVsdC5uczEuYWRndWFyZC5jb20",
}
err := validateUpstreams(upstreamsSet)
if err == nil {
t.Fatalf("there is no default upstream")
}
// Let's add default upstream
upstreamsSet = append(upstreamsSet, "8.8.8.8")
err = validateUpstreams(upstreamsSet)
if err != nil {
t.Fatalf("upstreams set is valid, but doesn't pass through validation cause: %s", err)
}
// Let's add invalid upstream
upstreamsSet = append(upstreamsSet, "dhcp://fake.dns")
err = validateUpstreams(upstreamsSet)
if err == nil {
t.Fatalf("there is an invalid upstream in set, but it pass through validation")
}
}

11
home/dns.go
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@ -156,6 +156,9 @@ func generateServerConfig() (dnsforward.ServerConfig, error) {
UDPListenAddr: &net.UDPAddr{IP: net.ParseIP(config.DNS.BindHost), Port: config.DNS.Port},
TCPListenAddr: &net.TCPAddr{IP: net.ParseIP(config.DNS.BindHost), Port: config.DNS.Port},
FilteringConfig: config.DNS.FilteringConfig,
ConfigModified: onConfigModified,
HTTPRegister: httpRegister,
OnDNSRequest: onDNSRequest,
}
if config.TLS.Enabled {
@ -165,15 +168,7 @@ func generateServerConfig() (dnsforward.ServerConfig, error) {
}
}
upstreamConfig, err := proxy.ParseUpstreamsConfig(config.DNS.UpstreamDNS, config.DNS.BootstrapDNS, dnsforward.DefaultTimeout)
if err != nil {
return newconfig, fmt.Errorf("Couldn't get upstreams configuration cause: %s", err)
}
newconfig.Upstreams = upstreamConfig.Upstreams
newconfig.DomainsReservedUpstreams = upstreamConfig.DomainReservedUpstreams
newconfig.AllServers = config.DNS.AllServers
newconfig.FilterHandler = applyAdditionalFiltering
newconfig.OnDNSRequest = onDNSRequest
return newconfig, nil
}

2
home/filter.go
View File

@ -499,7 +499,7 @@ func (filter *filter) LastTimeUpdated() time.Time {
func enableFilters(async bool) {
var filters map[int]string
if config.DNS.FilteringConfig.FilteringEnabled {
if config.DNS.FilteringEnabled {
// convert array of filters
filters = make(map[int]string)

4
home/i18n.go
View File

@ -79,6 +79,6 @@ func handleI18nChangeLanguage(w http.ResponseWriter, r *http.Request) {
}
config.Language = language
httpUpdateConfigReloadDNSReturnOK(w, r)
onConfigModified()
returnOK(w)
}