Merge: + dnsforward: match CNAME with filtering rules

Close #1185

* commit '8cb4d128f5392646eb60229717b09f8398897075':
  * openapi: get /querylog: add "original_answer", "service_name"
  * doc: filtering logic with a diagram
  + client: handle blocked by response in query log
  + dnsforward: match CNAME with filtering rules
This commit is contained in:
Simon Zolin 2019-12-03 17:09:30 +03:00
commit 07a9c3bd45
13 changed files with 352 additions and 40 deletions

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@ -61,7 +61,7 @@ Contents:
## Relations between subsystems ## Relations between subsystems
![](agh-arch.png) ![](doc/agh-arch.png)
@ -1064,11 +1064,12 @@ When a new DNS request is received and processed, we store information about thi
"QT":"...", // question type "QT":"...", // question type
"QC":"...", // question class "QC":"...", // question class
"Answer":"...", "Answer":"...",
"OrigAnswer":"...",
"Result":{ "Result":{
"IsFiltered":true, "IsFiltered":true,
"Reason":3, "Reason":3,
"Rule":"...", "Rule":"...",
"FilterID":1 "FilterID":1,
}, },
"Elapsed":12345, "Elapsed":12345,
"Upstream":"...", "Upstream":"...",
@ -1121,6 +1122,13 @@ Response:
} }
... ...
], ],
"original_answer":[ // Answer from upstream server (optional)
{
"type":"AAAA",
"value":"::"
}
...
],
"client":"127.0.0.1", "client":"127.0.0.1",
"elapsedMs":"0.098403", "elapsedMs":"0.098403",
"filterId":1, "filterId":1,
@ -1131,6 +1139,7 @@ Response:
}, },
"reason":"FilteredBlackList", "reason":"FilteredBlackList",
"rule":"||doubleclick.net^", "rule":"||doubleclick.net^",
"service_name": "...", // set if reason=FilteredBlockedService
"status":"NOERROR", "status":"NOERROR",
"time":"2006-01-02T15:04:05.999999999Z07:00" "time":"2006-01-02T15:04:05.999999999Z07:00"
} }
@ -1175,6 +1184,26 @@ Response:
## Filtering ## Filtering
![](doc/agh-filtering.png)
This is how DNS requests and responses are filtered by AGH:
* 'dnsproxy' module receives DNS request from client and passes control to AGH
* AGH applies filtering logic to the host name in DNS Question:
* process Rewrite rules
* match host name against filtering lists
* match host name against blocked services rules
* process SafeSearch rules
* request SafeBrowsing & ParentalControl services and process their response
* If the handlers above create a successful result that can be immediately sent to a client, it's passed back to 'dnsproxy' module
* Otherwise, AGH passes the DNS request to an upstream server via 'dnsproxy' module
* After 'dnsproxy' module has received a response from an upstream server, it passes control back to AGH
* If the filtering logic for DNS request returned a 'whitelist' flag, AGH passes the response to a client
* Otherwise, AGH applies filtering logic to each DNS record in response:
* For CNAME records, the target name is matched against filtering lists (ignoring 'whitelist' rules)
* For A and AAAA records, the IP address is matched against filtering lists (ignoring 'whitelist' rules)
### Filters update mechanism ### Filters update mechanism
Filters can be updated either manually by request from UI or automatically. Filters can be updated either manually by request from UI or automatically.

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@ -405,5 +405,6 @@
"netname": "Network name", "netname": "Network name",
"descr": "Description", "descr": "Description",
"whois": "Whois", "whois": "Whois",
"filtering_rules_learn_more": "<0>Learn more</0> about creating your own hosts blocklists." "filtering_rules_learn_more": "<0>Learn more</0> about creating your own hosts blocklists.",
"blocked_by_response": "Blocked by CNAME or IP in response"
} }

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@ -134,9 +134,16 @@ class Logs extends Component {
); );
}; };
normalizeResponse = response => (
response.map((response) => {
const { value, type, ttl } = response;
return `${type}: ${value} (ttl=${ttl})`;
})
);
getResponseCell = ({ value: responses, original }) => { getResponseCell = ({ value: responses, original }) => {
const { const {
reason, filterId, rule, status, reason, filterId, rule, status, originalAnswer,
} = original; } = original;
const { t, filtering } = this.props; const { t, filtering } = this.props;
const { filters } = filtering; const { filters } = filtering;
@ -149,6 +156,7 @@ class Logs extends Component {
const isBlockedService = reason === FILTERED_STATUS.FILTERED_BLOCKED_SERVICE; const isBlockedService = reason === FILTERED_STATUS.FILTERED_BLOCKED_SERVICE;
const currentService = SERVICES.find(service => service.id === original.serviceName); const currentService = SERVICES.find(service => service.id === original.serviceName);
const serviceName = currentService && currentService.name; const serviceName = currentService && currentService.name;
const normalizedAnswer = originalAnswer && this.normalizeResponse(originalAnswer);
let filterName = ''; let filterName = '';
if (filterId === 0) { if (filterId === 0) {
@ -168,7 +176,12 @@ class Logs extends Component {
return ( return (
<div className="logs__row logs__row--column"> <div className="logs__row logs__row--column">
<div className="logs__text-wrap"> <div className="logs__text-wrap">
{(isFiltered || isBlockedService) && ( {originalAnswer && (
<span className="logs__text">
<Trans>blocked_by_response</Trans>
</span>
)}
{!originalAnswer && (isFiltered || isBlockedService) && (
<span className="logs__text" title={parsedFilteredReason}> <span className="logs__text" title={parsedFilteredReason}>
{parsedFilteredReason} {parsedFilteredReason}
</span> </span>
@ -183,7 +196,10 @@ class Logs extends Component {
)} )}
</div> </div>
<div className="logs__list-wrap"> <div className="logs__list-wrap">
{this.renderResponseList(responses, status)} {originalAnswer
? this.renderResponseList(normalizedAnswer, status)
: this.renderResponseList(responses, status)
}
{isWhiteList && this.renderTooltip(isWhiteList, rule, filterName)} {isWhiteList && this.renderTooltip(isWhiteList, rule, filterName)}
</div> </div>
</div> </div>

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@ -50,6 +50,7 @@ export const normalizeLogs = logs => logs.map((log) => {
rule, rule,
service_name, service_name,
status, status,
original_answer,
} = log; } = log;
const { host: domain, type } = question; const { host: domain, type } = question;
const responsesArray = response ? response.map((response) => { const responsesArray = response ? response.map((response) => {
@ -65,8 +66,9 @@ export const normalizeLogs = logs => logs.map((log) => {
client, client,
filterId, filterId,
rule, rule,
serviceName: service_name,
status, status,
serviceName: service_name,
originalAnswer: original_answer,
}; };
}); });

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@ -164,6 +164,15 @@ func (s *Server) Start(config *ServerConfig) error {
// startInternal starts without locking // startInternal starts without locking
func (s *Server) startInternal(config *ServerConfig) error { func (s *Server) startInternal(config *ServerConfig) error {
err := s.prepare(config)
if err != nil {
return err
}
return s.dnsProxy.Start()
}
// Prepare the object
func (s *Server) prepare(config *ServerConfig) error {
if s.dnsProxy != nil { if s.dnsProxy != nil {
return errors.New("DNS server is already started") return errors.New("DNS server is already started")
} }
@ -243,7 +252,7 @@ func (s *Server) startInternal(config *ServerConfig) error {
// Initialize and start the DNS proxy // Initialize and start the DNS proxy
s.dnsProxy = &proxy.Proxy{Config: proxyConfig} s.dnsProxy = &proxy.Proxy{Config: proxyConfig}
return s.dnsProxy.Start() return nil
} }
// Stop stops the DNS server // Stop stops the DNS server
@ -344,6 +353,7 @@ func (s *Server) beforeRequestHandler(p *proxy.Proxy, d *proxy.DNSContext) (bool
} }
// handleDNSRequest filters the incoming DNS requests and writes them to the query log // handleDNSRequest filters the incoming DNS requests and writes them to the query log
// nolint (gocyclo)
func (s *Server) handleDNSRequest(p *proxy.Proxy, d *proxy.DNSContext) error { func (s *Server) handleDNSRequest(p *proxy.Proxy, d *proxy.DNSContext) error {
start := time.Now() start := time.Now()
@ -372,6 +382,7 @@ func (s *Server) handleDNSRequest(p *proxy.Proxy, d *proxy.DNSContext) error {
return err return err
} }
var origResp *dns.Msg
if d.Res == nil { if d.Res == nil {
answer := []dns.RR{} answer := []dns.RR{}
originalQuestion := d.Req.Question[0] originalQuestion := d.Req.Question[0]
@ -396,6 +407,18 @@ func (s *Server) handleDNSRequest(p *proxy.Proxy, d *proxy.DNSContext) error {
answer = append(answer, d.Res.Answer...) // host -> IP answer = append(answer, d.Res.Answer...) // host -> IP
d.Res.Answer = answer d.Res.Answer = answer
} }
} else if res.Reason != dnsfilter.NotFilteredWhiteList {
origResp2 := d.Res
res, err = s.filterResponse(d)
if err != nil {
return err
}
if res != nil {
origResp = origResp2 // matched by response
} else {
res = &dnsfilter.Result{}
}
} }
} }
@ -416,11 +439,18 @@ func (s *Server) handleDNSRequest(p *proxy.Proxy, d *proxy.DNSContext) error {
// Synchronize access to s.queryLog and s.stats so they won't be suddenly uninitialized while in use. // Synchronize access to s.queryLog and s.stats so they won't be suddenly uninitialized while in use.
// This can happen after proxy server has been stopped, but its workers haven't yet exited. // This can happen after proxy server has been stopped, but its workers haven't yet exited.
if shouldLog && s.queryLog != nil { if shouldLog && s.queryLog != nil {
upstreamAddr := "" p := querylog.AddParams{
if d.Upstream != nil { Question: msg,
upstreamAddr = d.Upstream.Address() Answer: d.Res,
OrigAnswer: origResp,
Result: res,
Elapsed: elapsed,
ClientIP: getIP(d.Addr),
} }
s.queryLog.Add(msg, d.Res, res, elapsed, getIP(d.Addr), upstreamAddr) if d.Upstream != nil {
p.Upstream = d.Upstream.Address()
}
s.queryLog.Add(p)
} }
s.updateStats(d, elapsed, *res) s.updateStats(d, elapsed, *res)
@ -538,6 +568,54 @@ func (s *Server) filterDNSRequest(d *proxy.DNSContext) (*dnsfilter.Result, error
return &res, err return &res, err
} }
// If response contains CNAME, A or AAAA records, we apply filtering to each canonical host name or IP address.
// If this is a match, we set a new response in d.Res and return.
func (s *Server) filterResponse(d *proxy.DNSContext) (*dnsfilter.Result, error) {
for _, a := range d.Res.Answer {
host := ""
switch v := a.(type) {
case *dns.CNAME:
log.Debug("DNSFwd: Checking CNAME %s for %s", v.Target, v.Hdr.Name)
host = strings.TrimSuffix(v.Target, ".")
case *dns.A:
host = v.A.String()
log.Debug("DNSFwd: Checking record A (%s) for %s", host, v.Hdr.Name)
case *dns.AAAA:
host = v.AAAA.String()
log.Debug("DNSFwd: Checking record AAAA (%s) for %s", host, v.Hdr.Name)
default:
continue
}
s.RLock()
// Synchronize access to s.dnsFilter so it won't be suddenly uninitialized while in use.
// This could happen after proxy server has been stopped, but its workers are not yet exited.
if !s.conf.ProtectionEnabled || s.dnsFilter == nil {
s.RUnlock()
continue
}
setts := dnsfilter.RequestFilteringSettings{}
setts.FilteringEnabled = true
res, err := s.dnsFilter.CheckHost(host, d.Req.Question[0].Qtype, &setts)
s.RUnlock()
if err != nil {
return nil, err
} else if res.IsFiltered {
d.Res = s.genDNSFilterMessage(d, &res)
log.Debug("DNSFwd: Matched %s by response: %s", d.Req.Question[0].Name, host)
return &res, nil
}
}
return nil, nil
}
// genDNSFilterMessage generates a DNS message corresponding to the filtering result // genDNSFilterMessage generates a DNS message corresponding to the filtering result
func (s *Server) genDNSFilterMessage(d *proxy.DNSContext, result *dnsfilter.Result) *dns.Msg { func (s *Server) genDNSFilterMessage(d *proxy.DNSContext, result *dnsfilter.Result) *dns.Msg {
m := d.Req m := d.Req

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@ -16,6 +16,7 @@ import (
"github.com/AdguardTeam/AdGuardHome/dnsfilter" "github.com/AdguardTeam/AdGuardHome/dnsfilter"
"github.com/AdguardTeam/dnsproxy/proxy" "github.com/AdguardTeam/dnsproxy/proxy"
"github.com/AdguardTeam/dnsproxy/upstream"
"github.com/miekg/dns" "github.com/miekg/dns"
"github.com/stretchr/testify/assert" "github.com/stretchr/testify/assert"
) )
@ -246,6 +247,142 @@ func TestBlockedRequest(t *testing.T) {
} }
} }
// testUpstream is a mock of real upstream.
// specify fields with necessary values to simulate real upstream behaviour
type testUpstream struct {
cn map[string]string // Map of [name]canonical_name
ipv4 map[string][]net.IP // Map of [name]IPv4
ipv6 map[string][]net.IP // Map of [name]IPv6
}
func (u *testUpstream) Exchange(m *dns.Msg) (*dns.Msg, error) {
resp := dns.Msg{}
resp.SetReply(m)
hasARecord := false
hasAAAARecord := false
reqType := m.Question[0].Qtype
name := m.Question[0].Name
// Let's check if we have any CNAME for given name
if cname, ok := u.cn[name]; ok {
cn := dns.CNAME{}
cn.Hdr.Name = name
cn.Hdr.Rrtype = dns.TypeCNAME
cn.Target = cname
resp.Answer = append(resp.Answer, &cn)
}
// Let's check if we can add some A records to the answer
if ipv4addr, ok := u.ipv4[name]; ok && reqType == dns.TypeA {
hasARecord = true
for _, ipv4 := range ipv4addr {
respA := dns.A{}
respA.Hdr.Rrtype = dns.TypeA
respA.Hdr.Name = name
respA.A = ipv4
resp.Answer = append(resp.Answer, &respA)
}
}
// Let's check if we can add some AAAA records to the answer
if u.ipv6 != nil {
if ipv6addr, ok := u.ipv6[name]; ok && reqType == dns.TypeAAAA {
hasAAAARecord = true
for _, ipv6 := range ipv6addr {
respAAAA := dns.A{}
respAAAA.Hdr.Rrtype = dns.TypeAAAA
respAAAA.Hdr.Name = name
respAAAA.A = ipv6
resp.Answer = append(resp.Answer, &respAAAA)
}
}
}
if len(resp.Answer) == 0 {
if hasARecord || hasAAAARecord {
// Set No Error RCode if there are some records for given Qname but we didn't apply them
resp.SetRcode(m, dns.RcodeSuccess)
} else {
// Set NXDomain RCode otherwise
resp.SetRcode(m, dns.RcodeNameError)
}
}
return &resp, nil
}
func (u *testUpstream) Address() string {
return "test"
}
func (s *Server) startWithUpstream(u upstream.Upstream) error {
s.Lock()
defer s.Unlock()
err := s.prepare(nil)
if err != nil {
return err
}
s.dnsProxy.Upstreams = []upstream.Upstream{u}
return s.dnsProxy.Start()
}
// testCNAMEs is a simple map of names and CNAMEs necessary for the testUpstream work
var testCNAMEs = map[string]string{
"badhost.": "null.example.org.",
"whitelist.example.org.": "null.example.org.",
}
// testIPv4 is a simple map of names and IPv4s necessary for the testUpstream work
var testIPv4 = map[string][]net.IP{
"null.example.org.": {{1, 2, 3, 4}},
"example.org.": {{127, 0, 0, 255}},
}
func TestBlockCNAME(t *testing.T) {
s := createTestServer(t)
testUpstm := &testUpstream{testCNAMEs, testIPv4, nil}
err := s.startWithUpstream(testUpstm)
assert.True(t, err == nil)
addr := s.dnsProxy.Addr(proxy.ProtoUDP)
// 'badhost' has a canonical name 'null.example.org' which is blocked by filters:
// response is blocked
req := dns.Msg{}
req.Id = dns.Id()
req.Question = []dns.Question{
{Name: "badhost.", Qtype: dns.TypeA, Qclass: dns.ClassINET},
}
reply, err := dns.Exchange(&req, addr.String())
assert.True(t, err == nil)
assert.True(t, reply.Rcode == dns.RcodeNameError)
// 'whitelist.example.org' has a canonical name 'null.example.org' which is blocked by filters
// but 'whitelist.example.org' is in a whitelist:
// response isn't blocked
req = dns.Msg{}
req.Id = dns.Id()
req.Question = []dns.Question{
{Name: "whitelist.example.org.", Qtype: dns.TypeA, Qclass: dns.ClassINET},
}
reply, err = dns.Exchange(&req, addr.String())
assert.True(t, err == nil)
assert.True(t, reply.Rcode == dns.RcodeSuccess)
// 'example.org' has a canonical name 'cname1' with IP 127.0.0.255 which is blocked by filters:
// response is blocked
req = dns.Msg{}
req.Id = dns.Id()
req.Question = []dns.Question{
{Name: "example.org.", Qtype: dns.TypeA, Qclass: dns.ClassINET},
}
reply, err = dns.Exchange(&req, addr.String())
assert.True(t, err == nil)
assert.True(t, reply.Rcode == dns.RcodeNameError)
_ = s.Stop()
}
func TestNullBlockedRequest(t *testing.T) { func TestNullBlockedRequest(t *testing.T) {
s := createTestServer(t) s := createTestServer(t)
s.conf.FilteringConfig.BlockingMode = "null_ip" s.conf.FilteringConfig.BlockingMode = "null_ip"
@ -376,7 +513,7 @@ func TestBlockedBySafeBrowsing(t *testing.T) {
} }
func createTestServer(t *testing.T) *Server { func createTestServer(t *testing.T) *Server {
rules := "||nxdomain.example.org^\n||null.example.org^\n127.0.0.1 host.example.org\n" rules := "||nxdomain.example.org^\n||null.example.org^\n127.0.0.1 host.example.org\n@@||whitelist.example.org^\n||127.0.0.255\n"
filters := map[int]string{} filters := map[int]string{}
filters[0] = rules filters[0] = rules
c := dnsfilter.Config{} c := dnsfilter.Config{}

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@ -1405,6 +1405,11 @@ definitions:
type: "array" type: "array"
items: items:
$ref: "#/definitions/DnsAnswer" $ref: "#/definitions/DnsAnswer"
original_answer:
type: "array"
description: "Answer from upstream server (optional)"
items:
$ref: "#/definitions/DnsAnswer"
client: client:
type: "string" type: "string"
example: "192.168.0.1" example: "192.168.0.1"
@ -1433,6 +1438,10 @@ definitions:
- "FilteredParental" - "FilteredParental"
- "FilteredInvalid" - "FilteredInvalid"
- "FilteredSafeSearch" - "FilteredSafeSearch"
- "FilteredBlockedService"
service_name:
type: "string"
description: "Set if reason=FilteredBlockedService"
status: status:
type: "string" type: "string"
description: "DNS response status" description: "DNS response status"

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@ -2,7 +2,6 @@ package querylog
import ( import (
"fmt" "fmt"
"net"
"os" "os"
"path/filepath" "path/filepath"
"strconv" "strconv"
@ -97,51 +96,59 @@ type logEntry struct {
QClass string `json:"QC"` QClass string `json:"QC"`
Answer []byte `json:",omitempty"` // sometimes empty answers happen like binerdunt.top or rev2.globalrootservers.net Answer []byte `json:",omitempty"` // sometimes empty answers happen like binerdunt.top or rev2.globalrootservers.net
OrigAnswer []byte `json:",omitempty"`
Result dnsfilter.Result Result dnsfilter.Result
Elapsed time.Duration Elapsed time.Duration
Upstream string `json:",omitempty"` // if empty, means it was cached Upstream string `json:",omitempty"` // if empty, means it was cached
} }
func (l *queryLog) Add(question *dns.Msg, answer *dns.Msg, result *dnsfilter.Result, elapsed time.Duration, ip net.IP, upstream string) { func (l *queryLog) Add(params AddParams) {
if !l.conf.Enabled { if !l.conf.Enabled {
return return
} }
if question == nil || len(question.Question) != 1 || len(question.Question[0].Name) == 0 || if params.Question == nil || len(params.Question.Question) != 1 || len(params.Question.Question[0].Name) == 0 ||
ip == nil { params.ClientIP == nil {
return return
} }
var a []byte if params.Result == nil {
var err error params.Result = &dnsfilter.Result{}
if answer != nil {
a, err = answer.Pack()
if err != nil {
log.Printf("failed to pack answer for querylog: %s", err)
return
}
}
if result == nil {
result = &dnsfilter.Result{}
} }
now := time.Now() now := time.Now()
entry := logEntry{ entry := logEntry{
IP: ip.String(), IP: params.ClientIP.String(),
Time: now, Time: now,
Answer: a, Result: *params.Result,
Result: *result, Elapsed: params.Elapsed,
Elapsed: elapsed, Upstream: params.Upstream,
Upstream: upstream,
} }
q := question.Question[0] q := params.Question.Question[0]
entry.QHost = strings.ToLower(q.Name[:len(q.Name)-1]) // remove the last dot entry.QHost = strings.ToLower(q.Name[:len(q.Name)-1]) // remove the last dot
entry.QType = dns.Type(q.Qtype).String() entry.QType = dns.Type(q.Qtype).String()
entry.QClass = dns.Class(q.Qclass).String() entry.QClass = dns.Class(q.Qclass).String()
if params.Answer != nil {
a, err := params.Answer.Pack()
if err != nil {
log.Info("Querylog: Answer.Pack(): %s", err)
return
}
entry.Answer = a
}
if params.OrigAnswer != nil {
a, err := params.OrigAnswer.Pack()
if err != nil {
log.Info("Querylog: OrigAnswer.Pack(): %s", err)
return
}
entry.OrigAnswer = a
}
l.bufferLock.Lock() l.bufferLock.Lock()
l.buffer = append(l.buffer, &entry) l.buffer = append(l.buffer, &entry)
needFlush := false needFlush := false
@ -335,6 +342,19 @@ func (l *queryLog) getData(params getDataParams) map[string]interface{} {
jsonEntry["answer"] = answers jsonEntry["answer"] = answers
} }
if len(entry.OrigAnswer) != 0 {
a := new(dns.Msg)
err := a.Unpack(entry.OrigAnswer)
if err == nil {
answers = answerToMap(a)
if answers != nil {
jsonEntry["original_answer"] = answers
}
} else {
log.Debug("Querylog: a.Unpack(entry.OrigAnswer): %s: %s", err, string(entry.OrigAnswer))
}
}
data = append(data, jsonEntry) data = append(data, jsonEntry)
} }

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@ -22,7 +22,7 @@ type QueryLog interface {
Close() Close()
// Add a log entry // Add a log entry
Add(question *dns.Msg, answer *dns.Msg, result *dnsfilter.Result, elapsed time.Duration, ip net.IP, upstream string) Add(params AddParams)
// WriteDiskConfig - write configuration // WriteDiskConfig - write configuration
WriteDiskConfig(dc *DiskConfig) WriteDiskConfig(dc *DiskConfig)
@ -42,6 +42,17 @@ type Config struct {
HTTPRegister func(string, string, func(http.ResponseWriter, *http.Request)) HTTPRegister func(string, string, func(http.ResponseWriter, *http.Request))
} }
// AddParams - parameters for Add()
type AddParams struct {
Question *dns.Msg
Answer *dns.Msg // The response we sent to the client (optional)
OrigAnswer *dns.Msg // The response from an upstream server (optional)
Result *dnsfilter.Result // Filtering result (optional)
Elapsed time.Duration // Time spent for processing the request
ClientIP net.IP
Upstream string
}
// New - create a new instance of the query log // New - create a new instance of the query log
func New(conf Config) QueryLog { func New(conf Config) QueryLog {
return newQueryLog(conf) return newQueryLog(conf)

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@ -574,6 +574,8 @@ func decode(ent *logEntry, str string) {
case "Answer": case "Answer":
ent.Answer, err = base64.StdEncoding.DecodeString(v) ent.Answer, err = base64.StdEncoding.DecodeString(v)
case "OrigAnswer":
ent.OrigAnswer, err = base64.StdEncoding.DecodeString(v)
case "IsFiltered": case "IsFiltered":
b, err = strconv.ParseBool(v) b, err = strconv.ParseBool(v)

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@ -115,7 +115,14 @@ func addEntry(l *queryLog, host, answerStr, client string) {
answer.A = net.ParseIP(answerStr) answer.A = net.ParseIP(answerStr)
a.Answer = append(a.Answer, answer) a.Answer = append(a.Answer, answer)
res := dnsfilter.Result{} res := dnsfilter.Result{}
l.Add(&q, &a, &res, 0, net.ParseIP(client), "upstream") params := AddParams{
Question: &q,
Answer: &a,
Result: &res,
ClientIP: net.ParseIP(client),
Upstream: "upstream",
}
l.Add(params)
} }
func checkEntry(t *testing.T, m map[string]interface{}, host, answer, client string) bool { func checkEntry(t *testing.T, m map[string]interface{}, host, answer, client string) bool {