1006 lines
30 KiB
Go
1006 lines
30 KiB
Go
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net"
|
|
"net/http"
|
|
"os"
|
|
"sort"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"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"
|
|
govalidator "gopkg.in/asaskevich/govalidator.v4"
|
|
)
|
|
|
|
const updatePeriod = time.Minute * 30
|
|
|
|
// cached version.json to avoid hammering github.io for each page reload
|
|
var versionCheckJSON []byte
|
|
var versionCheckLastTime time.Time
|
|
|
|
var protocols = []string{"tls://", "https://", "tcp://", "sdns://"}
|
|
|
|
const versionCheckURL = "https://adguardteam.github.io/AdGuardHome/version.json"
|
|
const versionCheckPeriod = time.Hour * 8
|
|
|
|
var transport = &http.Transport{
|
|
DialContext: customDialContext,
|
|
}
|
|
|
|
var client = &http.Client{
|
|
Timeout: time.Minute * 5,
|
|
Transport: transport,
|
|
}
|
|
|
|
var controlLock sync.Mutex
|
|
|
|
// ----------------
|
|
// helper functions
|
|
// ----------------
|
|
|
|
func returnOK(w http.ResponseWriter) {
|
|
_, err := fmt.Fprintf(w, "OK\n")
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Couldn't write body: %s", err)
|
|
}
|
|
}
|
|
|
|
func httpError(w http.ResponseWriter, code int, format string, args ...interface{}) {
|
|
text := fmt.Sprintf(format, args...)
|
|
log.Info(text)
|
|
http.Error(w, text, code)
|
|
}
|
|
|
|
// ---------------
|
|
// dns run control
|
|
// ---------------
|
|
func writeAllConfigsAndReloadDNS() error {
|
|
err := writeAllConfigs()
|
|
if err != nil {
|
|
log.Error("Couldn't write all configs: %s", err)
|
|
return err
|
|
}
|
|
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 handleStatus(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
|
|
dnsAddresses := []string{}
|
|
if config.DNS.BindHost == "0.0.0.0" {
|
|
ifaces, e := getValidNetInterfacesForWeb()
|
|
if e != nil {
|
|
log.Error("Couldn't get network interfaces: %v", e)
|
|
}
|
|
for _, iface := range ifaces {
|
|
for _, addr := range iface.Addresses {
|
|
dnsAddresses = append(dnsAddresses, addr)
|
|
}
|
|
}
|
|
}
|
|
if len(dnsAddresses) == 0 {
|
|
dnsAddresses = append(dnsAddresses, config.DNS.BindHost)
|
|
}
|
|
|
|
data := map[string]interface{}{
|
|
"dns_addresses": dnsAddresses,
|
|
"http_port": config.BindPort,
|
|
"dns_port": config.DNS.Port,
|
|
"protection_enabled": config.DNS.ProtectionEnabled,
|
|
"querylog_enabled": config.DNS.QueryLogEnabled,
|
|
"running": isRunning(),
|
|
"bootstrap_dns": config.DNS.BootstrapDNS,
|
|
"upstream_dns": config.DNS.UpstreamDNS,
|
|
"all_servers": config.DNS.AllServers,
|
|
"version": VersionString,
|
|
"language": config.Language,
|
|
}
|
|
|
|
jsonVal, err := json.Marshal(data)
|
|
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, "Unable to write response json: %s", err)
|
|
return
|
|
}
|
|
}
|
|
|
|
func handleProtectionEnable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
config.DNS.ProtectionEnabled = true
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleProtectionDisable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
config.DNS.ProtectionEnabled = false
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
// -----
|
|
// stats
|
|
// -----
|
|
func handleQueryLogEnable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
config.DNS.QueryLogEnabled = true
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleQueryLogDisable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
config.DNS.QueryLogEnabled = false
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleQueryLog(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
data := dnsServer.GetQueryLog()
|
|
|
|
jsonVal, err := json.Marshal(data)
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Couldn't marshal data into json: %s", err)
|
|
return
|
|
}
|
|
|
|
w.Header().Set("Content-Type", "application/json")
|
|
_, err = w.Write(jsonVal)
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Unable to write response json: %s", err)
|
|
}
|
|
}
|
|
|
|
func handleStatsTop(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
s := dnsServer.GetStatsTop()
|
|
|
|
// use manual json marshalling because we want maps to be sorted by value
|
|
statsJSON := bytes.Buffer{}
|
|
statsJSON.WriteString("{\n")
|
|
|
|
gen := func(json *bytes.Buffer, name string, top map[string]int, addComma bool) {
|
|
json.WriteString(" ")
|
|
json.WriteString(fmt.Sprintf("%q", name))
|
|
json.WriteString(": {\n")
|
|
sorted := sortByValue(top)
|
|
// no more than 50 entries
|
|
if len(sorted) > 50 {
|
|
sorted = sorted[:50]
|
|
}
|
|
for i, key := range sorted {
|
|
json.WriteString(" ")
|
|
json.WriteString(fmt.Sprintf("%q", key))
|
|
json.WriteString(": ")
|
|
json.WriteString(strconv.Itoa(top[key]))
|
|
if i+1 != len(sorted) {
|
|
json.WriteByte(',')
|
|
}
|
|
json.WriteByte('\n')
|
|
}
|
|
json.WriteString(" }")
|
|
if addComma {
|
|
json.WriteByte(',')
|
|
}
|
|
json.WriteByte('\n')
|
|
}
|
|
gen(&statsJSON, "top_queried_domains", s.Domains, true)
|
|
gen(&statsJSON, "top_blocked_domains", s.Blocked, true)
|
|
gen(&statsJSON, "top_clients", s.Clients, true)
|
|
statsJSON.WriteString(" \"stats_period\": \"24 hours\"\n")
|
|
statsJSON.WriteString("}\n")
|
|
|
|
w.Header().Set("Content-Type", "application/json")
|
|
_, err := w.Write(statsJSON.Bytes())
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Couldn't write body: %s", err)
|
|
}
|
|
}
|
|
|
|
// handleStatsReset resets the stats caches
|
|
func handleStatsReset(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
dnsServer.PurgeStats()
|
|
_, err := fmt.Fprintf(w, "OK\n")
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Couldn't write body: %s", err)
|
|
}
|
|
}
|
|
|
|
// handleStats returns aggregated stats data for the 24 hours
|
|
func handleStats(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
summed := dnsServer.GetAggregatedStats()
|
|
|
|
statsJSON, err := json.Marshal(summed)
|
|
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(statsJSON)
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Unable to write response json: %s", err)
|
|
return
|
|
}
|
|
}
|
|
|
|
// HandleStatsHistory returns historical stats data for the 24 hours
|
|
func handleStatsHistory(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
// handle time unit and prepare our time window size
|
|
timeUnitString := r.URL.Query().Get("time_unit")
|
|
var timeUnit time.Duration
|
|
switch timeUnitString {
|
|
case "seconds":
|
|
timeUnit = time.Second
|
|
case "minutes":
|
|
timeUnit = time.Minute
|
|
case "hours":
|
|
timeUnit = time.Hour
|
|
case "days":
|
|
timeUnit = time.Hour * 24
|
|
default:
|
|
http.Error(w, "Must specify valid time_unit parameter", http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
// parse start and end time
|
|
startTime, err := time.Parse(time.RFC3339, r.URL.Query().Get("start_time"))
|
|
if err != nil {
|
|
httpError(w, http.StatusBadRequest, "Must specify valid start_time parameter: %s", err)
|
|
return
|
|
}
|
|
endTime, err := time.Parse(time.RFC3339, r.URL.Query().Get("end_time"))
|
|
if err != nil {
|
|
httpError(w, http.StatusBadRequest, "Must specify valid end_time parameter: %s", err)
|
|
return
|
|
}
|
|
|
|
data, err := dnsServer.GetStatsHistory(timeUnit, startTime, endTime)
|
|
if err != nil {
|
|
httpError(w, http.StatusBadRequest, "Cannot get stats history: %s", err)
|
|
return
|
|
}
|
|
|
|
statsJSON, err := json.Marshal(data)
|
|
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(statsJSON)
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Unable to write response json: %s", err)
|
|
return
|
|
}
|
|
}
|
|
|
|
// sortByValue is a helper function for querylog API
|
|
func sortByValue(m map[string]int) []string {
|
|
type kv struct {
|
|
k string
|
|
v int
|
|
}
|
|
var ss []kv
|
|
for k, v := range m {
|
|
ss = append(ss, kv{k, v})
|
|
}
|
|
sort.Slice(ss, func(l, r int) bool {
|
|
return ss[l].v > ss[r].v
|
|
})
|
|
|
|
sorted := []string{}
|
|
for _, v := range ss {
|
|
sorted = append(sorted, v.k)
|
|
}
|
|
return sorted
|
|
}
|
|
|
|
// -----------------------
|
|
// 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) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
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) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
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
|
|
}
|
|
|
|
// ---------
|
|
// filtering
|
|
// ---------
|
|
|
|
func handleFilteringEnable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
config.DNS.FilteringEnabled = true
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleFilteringDisable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
config.DNS.FilteringEnabled = false
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleFilteringStatus(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
data := map[string]interface{}{
|
|
"enabled": config.DNS.FilteringEnabled,
|
|
}
|
|
|
|
config.RLock()
|
|
data["filters"] = config.Filters
|
|
data["user_rules"] = config.UserRules
|
|
jsonVal, err := json.Marshal(data)
|
|
config.RUnlock()
|
|
|
|
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, "Unable to write response json: %s", err)
|
|
return
|
|
}
|
|
}
|
|
|
|
func handleFilteringAddURL(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
f := filter{}
|
|
err := json.NewDecoder(r.Body).Decode(&f)
|
|
if err != nil {
|
|
httpError(w, http.StatusBadRequest, "Failed to parse request body json: %s", err)
|
|
return
|
|
}
|
|
|
|
if len(f.URL) == 0 {
|
|
http.Error(w, "URL parameter was not specified", http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
if valid := govalidator.IsRequestURL(f.URL); !valid {
|
|
http.Error(w, "URL parameter is not valid request URL", http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
// Check for duplicates
|
|
if filterExists(f.URL) {
|
|
httpError(w, http.StatusBadRequest, "Filter URL already added -- %s", f.URL)
|
|
return
|
|
}
|
|
|
|
// Set necessary properties
|
|
f.ID = assignUniqueFilterID()
|
|
f.Enabled = true
|
|
|
|
// Download the filter contents
|
|
ok, err := f.update()
|
|
if err != nil {
|
|
httpError(w, http.StatusBadRequest, "Couldn't fetch filter from url %s: %s", f.URL, err)
|
|
return
|
|
}
|
|
if f.RulesCount == 0 {
|
|
httpError(w, http.StatusBadRequest, "Filter at the url %s has no rules (maybe it points to blank page?)", f.URL)
|
|
return
|
|
}
|
|
if !ok {
|
|
httpError(w, http.StatusBadRequest, "Filter at the url %s is invalid (maybe it points to blank page?)", f.URL)
|
|
return
|
|
}
|
|
|
|
// Save the filter contents
|
|
err = f.save()
|
|
if err != nil {
|
|
httpError(w, http.StatusBadRequest, "Failed to save filter %d due to %s", f.ID, err)
|
|
return
|
|
}
|
|
|
|
// URL is deemed valid, append it to filters, update config, write new filter file and tell dns to reload it
|
|
// TODO: since we directly feed filters in-memory, revisit if writing configs is always necessary
|
|
if !filterAdd(f) {
|
|
httpError(w, http.StatusBadRequest, "Filter URL already added -- %s", f.URL)
|
|
return
|
|
}
|
|
|
|
err = writeAllConfigs()
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Couldn't write config file: %s", err)
|
|
return
|
|
}
|
|
|
|
err = reconfigureDNSServer()
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Couldn't reconfigure the DNS server: %s", err)
|
|
return
|
|
}
|
|
|
|
_, err = fmt.Fprintf(w, "OK %d rules\n", f.RulesCount)
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Couldn't write body: %s", err)
|
|
}
|
|
}
|
|
|
|
func handleFilteringRemoveURL(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
|
|
type request struct {
|
|
URL string `json:"url"`
|
|
}
|
|
req := request{}
|
|
err := json.NewDecoder(r.Body).Decode(&req)
|
|
if err != nil {
|
|
httpError(w, http.StatusBadRequest, "Failed to parse request body json: %s", err)
|
|
return
|
|
}
|
|
|
|
if valid := govalidator.IsRequestURL(req.URL); !valid {
|
|
http.Error(w, "URL parameter is not valid request URL", http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
// go through each element and delete if url matches
|
|
config.Lock()
|
|
newFilters := config.Filters[:0]
|
|
for _, filter := range config.Filters {
|
|
if filter.URL != req.URL {
|
|
newFilters = append(newFilters, filter)
|
|
} else {
|
|
// Remove the filter file
|
|
err := os.Remove(filter.Path())
|
|
if err != nil && !os.IsNotExist(err) {
|
|
httpError(w, http.StatusInternalServerError, "Couldn't remove the filter file: %s", err)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
// Update the configuration after removing filter files
|
|
config.Filters = newFilters
|
|
config.Unlock()
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleFilteringEnableURL(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
parameters, err := parseParametersFromBody(r.Body)
|
|
if err != nil {
|
|
httpError(w, http.StatusBadRequest, "failed to parse parameters from body: %s", err)
|
|
return
|
|
}
|
|
|
|
url, ok := parameters["url"]
|
|
if !ok {
|
|
http.Error(w, "URL parameter was not specified", http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
if valid := govalidator.IsRequestURL(url); !valid {
|
|
http.Error(w, "URL parameter is not valid request URL", http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
found := filterEnable(url, true)
|
|
if !found {
|
|
http.Error(w, "URL parameter was not previously added", http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleFilteringDisableURL(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
parameters, err := parseParametersFromBody(r.Body)
|
|
if err != nil {
|
|
httpError(w, http.StatusBadRequest, "failed to parse parameters from body: %s", err)
|
|
return
|
|
}
|
|
|
|
url, ok := parameters["url"]
|
|
if !ok {
|
|
http.Error(w, "URL parameter was not specified", http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
if valid := govalidator.IsRequestURL(url); !valid {
|
|
http.Error(w, "URL parameter is not valid request URL", http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
found := filterEnable(url, false)
|
|
if !found {
|
|
http.Error(w, "URL parameter was not previously added", http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleFilteringSetRules(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
body, err := ioutil.ReadAll(r.Body)
|
|
if err != nil {
|
|
httpError(w, http.StatusBadRequest, "Failed to read request body: %s", err)
|
|
return
|
|
}
|
|
|
|
config.UserRules = strings.Split(string(body), "\n")
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleFilteringRefresh(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
updated := refreshFiltersIfNecessary(true)
|
|
fmt.Fprintf(w, "OK %d filters updated\n", updated)
|
|
}
|
|
|
|
// ------------
|
|
// safebrowsing
|
|
// ------------
|
|
|
|
func handleSafeBrowsingEnable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
config.DNS.SafeBrowsingEnabled = true
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleSafeBrowsingDisable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
config.DNS.SafeBrowsingEnabled = false
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleSafeBrowsingStatus(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
data := map[string]interface{}{
|
|
"enabled": config.DNS.SafeBrowsingEnabled,
|
|
}
|
|
jsonVal, err := json.Marshal(data)
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Unable to marshal status json: %s", err)
|
|
}
|
|
|
|
w.Header().Set("Content-Type", "application/json")
|
|
_, err = w.Write(jsonVal)
|
|
if err != nil {
|
|
httpError(w, http.StatusInternalServerError, "Unable to write response json: %s", err)
|
|
return
|
|
}
|
|
}
|
|
|
|
// --------
|
|
// parental
|
|
// --------
|
|
func handleParentalEnable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
parameters, err := parseParametersFromBody(r.Body)
|
|
if err != nil {
|
|
httpError(w, http.StatusBadRequest, "failed to parse parameters from body: %s", err)
|
|
return
|
|
}
|
|
|
|
sensitivity, ok := parameters["sensitivity"]
|
|
if !ok {
|
|
http.Error(w, "Sensitivity parameter was not specified", 400)
|
|
return
|
|
}
|
|
|
|
switch sensitivity {
|
|
case "3":
|
|
break
|
|
case "EARLY_CHILDHOOD":
|
|
sensitivity = "3"
|
|
case "10":
|
|
break
|
|
case "YOUNG":
|
|
sensitivity = "10"
|
|
case "13":
|
|
break
|
|
case "TEEN":
|
|
sensitivity = "13"
|
|
case "17":
|
|
break
|
|
case "MATURE":
|
|
sensitivity = "17"
|
|
default:
|
|
http.Error(w, "Sensitivity must be set to valid value", 400)
|
|
return
|
|
}
|
|
i, err := strconv.Atoi(sensitivity)
|
|
if err != nil {
|
|
http.Error(w, "Sensitivity must be set to valid value", 400)
|
|
return
|
|
}
|
|
config.DNS.ParentalSensitivity = i
|
|
config.DNS.ParentalEnabled = true
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleParentalDisable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
config.DNS.ParentalEnabled = false
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleParentalStatus(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
data := map[string]interface{}{
|
|
"enabled": config.DNS.ParentalEnabled,
|
|
}
|
|
if config.DNS.ParentalEnabled {
|
|
data["sensitivity"] = config.DNS.ParentalSensitivity
|
|
}
|
|
jsonVal, err := json.Marshal(data)
|
|
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, "Unable to write response json: %s", err)
|
|
return
|
|
}
|
|
}
|
|
|
|
// ------------
|
|
// safebrowsing
|
|
// ------------
|
|
|
|
func handleSafeSearchEnable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
config.DNS.SafeSearchEnabled = true
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleSafeSearchDisable(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
config.DNS.SafeSearchEnabled = false
|
|
httpUpdateConfigReloadDNSReturnOK(w, r)
|
|
}
|
|
|
|
func handleSafeSearchStatus(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
data := map[string]interface{}{
|
|
"enabled": config.DNS.SafeSearchEnabled,
|
|
}
|
|
jsonVal, err := json.Marshal(data)
|
|
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, "Unable to write response json: %s", err)
|
|
return
|
|
}
|
|
}
|
|
|
|
// --------------
|
|
// DNS-over-HTTPS
|
|
// --------------
|
|
func handleDOH(w http.ResponseWriter, r *http.Request) {
|
|
log.Tracef("%s %v", r.Method, r.URL)
|
|
if r.TLS == nil {
|
|
httpError(w, http.StatusNotFound, "Not Found")
|
|
return
|
|
}
|
|
|
|
if !isRunning() {
|
|
httpError(w, http.StatusInternalServerError, "DNS server is not running")
|
|
return
|
|
}
|
|
|
|
dnsServer.ServeHTTP(w, r)
|
|
}
|
|
|
|
// ------------------------
|
|
// registration of handlers
|
|
// ------------------------
|
|
func registerControlHandlers() {
|
|
http.HandleFunc("/control/status", postInstall(optionalAuth(ensureGET(handleStatus))))
|
|
http.HandleFunc("/control/enable_protection", postInstall(optionalAuth(ensurePOST(handleProtectionEnable))))
|
|
http.HandleFunc("/control/disable_protection", postInstall(optionalAuth(ensurePOST(handleProtectionDisable))))
|
|
http.Handle("/control/querylog", postInstallHandler(optionalAuthHandler(gziphandler.GzipHandler(ensureGETHandler(handleQueryLog)))))
|
|
http.HandleFunc("/control/querylog_enable", postInstall(optionalAuth(ensurePOST(handleQueryLogEnable))))
|
|
http.HandleFunc("/control/querylog_disable", postInstall(optionalAuth(ensurePOST(handleQueryLogDisable))))
|
|
http.HandleFunc("/control/set_upstreams_config", postInstall(optionalAuth(ensurePOST(handleSetUpstreamConfig))))
|
|
http.HandleFunc("/control/test_upstream_dns", postInstall(optionalAuth(ensurePOST(handleTestUpstreamDNS))))
|
|
http.HandleFunc("/control/i18n/change_language", postInstall(optionalAuth(ensurePOST(handleI18nChangeLanguage))))
|
|
http.HandleFunc("/control/i18n/current_language", postInstall(optionalAuth(ensureGET(handleI18nCurrentLanguage))))
|
|
http.HandleFunc("/control/stats_top", postInstall(optionalAuth(ensureGET(handleStatsTop))))
|
|
http.HandleFunc("/control/stats", postInstall(optionalAuth(ensureGET(handleStats))))
|
|
http.HandleFunc("/control/stats_history", postInstall(optionalAuth(ensureGET(handleStatsHistory))))
|
|
http.HandleFunc("/control/stats_reset", postInstall(optionalAuth(ensurePOST(handleStatsReset))))
|
|
http.HandleFunc("/control/version.json", postInstall(optionalAuth(handleGetVersionJSON)))
|
|
http.HandleFunc("/control/update", postInstall(optionalAuth(ensurePOST(handleUpdate))))
|
|
http.HandleFunc("/control/filtering/enable", postInstall(optionalAuth(ensurePOST(handleFilteringEnable))))
|
|
http.HandleFunc("/control/filtering/disable", postInstall(optionalAuth(ensurePOST(handleFilteringDisable))))
|
|
http.HandleFunc("/control/filtering/add_url", postInstall(optionalAuth(ensurePOST(handleFilteringAddURL))))
|
|
http.HandleFunc("/control/filtering/remove_url", postInstall(optionalAuth(ensurePOST(handleFilteringRemoveURL))))
|
|
http.HandleFunc("/control/filtering/enable_url", postInstall(optionalAuth(ensurePOST(handleFilteringEnableURL))))
|
|
http.HandleFunc("/control/filtering/disable_url", postInstall(optionalAuth(ensurePOST(handleFilteringDisableURL))))
|
|
http.HandleFunc("/control/filtering/refresh", postInstall(optionalAuth(ensurePOST(handleFilteringRefresh))))
|
|
http.HandleFunc("/control/filtering/status", postInstall(optionalAuth(ensureGET(handleFilteringStatus))))
|
|
http.HandleFunc("/control/filtering/set_rules", postInstall(optionalAuth(ensurePOST(handleFilteringSetRules))))
|
|
http.HandleFunc("/control/safebrowsing/enable", postInstall(optionalAuth(ensurePOST(handleSafeBrowsingEnable))))
|
|
http.HandleFunc("/control/safebrowsing/disable", postInstall(optionalAuth(ensurePOST(handleSafeBrowsingDisable))))
|
|
http.HandleFunc("/control/safebrowsing/status", postInstall(optionalAuth(ensureGET(handleSafeBrowsingStatus))))
|
|
http.HandleFunc("/control/parental/enable", postInstall(optionalAuth(ensurePOST(handleParentalEnable))))
|
|
http.HandleFunc("/control/parental/disable", postInstall(optionalAuth(ensurePOST(handleParentalDisable))))
|
|
http.HandleFunc("/control/parental/status", postInstall(optionalAuth(ensureGET(handleParentalStatus))))
|
|
http.HandleFunc("/control/safesearch/enable", postInstall(optionalAuth(ensurePOST(handleSafeSearchEnable))))
|
|
http.HandleFunc("/control/safesearch/disable", postInstall(optionalAuth(ensurePOST(handleSafeSearchDisable))))
|
|
http.HandleFunc("/control/safesearch/status", postInstall(optionalAuth(ensureGET(handleSafeSearchStatus))))
|
|
http.HandleFunc("/control/dhcp/status", postInstall(optionalAuth(ensureGET(handleDHCPStatus))))
|
|
http.HandleFunc("/control/dhcp/interfaces", postInstall(optionalAuth(ensureGET(handleDHCPInterfaces))))
|
|
http.HandleFunc("/control/dhcp/set_config", postInstall(optionalAuth(ensurePOST(handleDHCPSetConfig))))
|
|
http.HandleFunc("/control/dhcp/find_active_dhcp", postInstall(optionalAuth(ensurePOST(handleDHCPFindActiveServer))))
|
|
http.HandleFunc("/control/dhcp/add_static_lease", postInstall(optionalAuth(ensurePOST(handleDHCPAddStaticLease))))
|
|
http.HandleFunc("/control/dhcp/remove_static_lease", postInstall(optionalAuth(ensurePOST(handleDHCPRemoveStaticLease))))
|
|
|
|
http.HandleFunc("/control/access/list", postInstall(optionalAuth(ensureGET(handleAccessList))))
|
|
http.HandleFunc("/control/access/set", postInstall(optionalAuth(ensurePOST(handleAccessSet))))
|
|
|
|
RegisterTLSHandlers()
|
|
RegisterClientsHandlers()
|
|
|
|
http.HandleFunc("/dns-query", postInstall(handleDOH))
|
|
}
|