Pull request: querylog: search clients by name, enrich http resp

Updates #1273. Squashed commit of the following: commit 55b78153b1b775c855e759011141bbbe6d4b962c Author: Artem Baskal <a.baskal@adguard.com> Date: Fri Apr 2 16:55:39 2021 +0300 Update client_info in case of null commit 5c80c1438ed9d961af11617831b704d6ae15cc34 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Fri Apr 2 16:24:14 2021 +0300 querylog: always set client_info commit b48efd64d757cc0bcf5b34de22fdd0b0464d98a6 Merge: 4ed7eab5 23c9f528 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Fri Apr 2 16:22:08 2021 +0300 Merge branch 'master' into 1273-querylog-client-name commit 4ed7eab52b6b5b0c0ddb5aa5a3225a62d1f9265b Merge: dbf990eb 70d4c70e Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Fri Apr 2 12:57:17 2021 +0300 Merge branch 'master' into 1273-querylog-client-name commit dbf990eb881116754554270e7b691b5db8e9ee34 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Fri Apr 2 12:56:13 2021 +0300 home: imp names commit c2cfdef494ca26fff62b9fa008f1b389d9d4d46b Author: Artem Baskal <a.baskal@adguard.com> Date: Thu Apr 1 19:26:04 2021 +0300 Rename to whois commit e3cc4a68ee576770b1922680155308e33bed31e8 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Thu Apr 1 19:03:42 2021 +0300 home: imp whois more commit 3b8ef8691c298aff35946b35923ef2e5b1f9bbbe Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Thu Apr 1 18:51:14 2021 +0300 home: imp whois resp commit fb97e0d74976723a512d6ff4c69e830fe59c8df8 Author: Artem Baskal <a.baskal@adguard.com> Date: Thu Apr 1 18:00:03 2021 +0300 Fix client_info ids prop types commit 298005189e372651ceff453e88aca19ee925a138 Author: Artem Baskal <a.baskal@adguard.com> Date: Thu Apr 1 17:58:14 2021 +0300 Adapt changes on client commit aa1769f64197d865478a66271da483babfc5dfd0 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Thu Apr 1 17:18:36 2021 +0300 all: add more fields to querylog client commit 4b2a2dbd380ec410f3068d15ea16430912e03e33 Merge: cda92c3f 2e4e2f62 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Thu Apr 1 16:57:26 2021 +0300 Merge branch 'master' into 1273-querylog-client-name commit cda92c3f0331cbac252f3163d31457f716bc7f2c Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Mon Mar 29 18:03:51 2021 +0300 querylog: fix windows tests commit 5a56f0a32608869ed93a38f18f63ea3a20f7bde2 Merge: 627e4958 e710ce11 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Mon Mar 29 17:45:53 2021 +0300 Merge branch 'master' into 1273-querylog-client-name commit 627e495828e82d44cc77aa393536479f23cc68b7 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Mon Mar 29 17:44:49 2021 +0300 querylog: add tests, imp code, docs commit 6dec468a2f0c29357875ff99458e0e8f8e580e6d Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Fri Mar 26 16:10:47 2021 +0300 querylog: search clients by name, enrich http resp
2024-08-16 22:20:30 +03:00 · 2021-04-02 17:30:39 +03:00 · 2021-04-02 17:30:39 +03:00 · 7c35d208b1
commit 7c35d208b1
parent 23c9f528db
30 changed files with 713 additions and 367 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -15,6 +15,7 @@ and this project adheres to

 ### Added

+- Search by clients' names in the query log ([#1273]).
 - Verbose version output with `-v --version` ([#2416]).
 - The ability to set a custom TLD for known local-network hosts ([#2393]).
 - The ability to serve DNS queries on multiple hosts and interfaces ([#1401]).
@ -44,6 +45,7 @@ and this project adheres to

 - Go 1.14 support.

+[#1273]: https://github.com/AdguardTeam/AdGuardHome/issues/1273
 [#1401]: https://github.com/AdguardTeam/AdGuardHome/issues/1401
 [#2385]: https://github.com/AdguardTeam/AdGuardHome/issues/2385
 [#2393]: https://github.com/AdguardTeam/AdGuardHome/issues/2393
--- a/client/src/actions/queryLogs.js
+++ b/client/src/actions/queryLogs.js
@ -1,23 +1,12 @@
 import { createAction } from 'redux-actions';

 import apiClient from '../api/Api';
-import { normalizeLogs, getParamsForClientsSearch, addClientInfo } from '../helpers/helpers';
+import { normalizeLogs } from '../helpers/helpers';
 import {
    DEFAULT_LOGS_FILTER, FORM_NAME, QUERY_LOGS_PAGE_LIMIT,
 } from '../helpers/constants';
 import { addErrorToast, addSuccessToast } from './toasts';

-const enrichWithClientInfo = async (logs) => {
-    const clientsParams = getParamsForClientsSearch(logs, 'client', 'client_id');
-
-    if (Object.keys(clientsParams).length > 0) {
-        const clients = await apiClient.findClients(clientsParams);
-        return addClientInfo(logs, clients, 'client_id', 'client');
-    }
-
-    return logs;
-};
-
 const getLogsWithParams = async (config) => {
    const { older_than, filter, ...values } = config;
    const rawLogs = await apiClient.getQueryLog({
@ -25,11 +14,9 @@ const getLogsWithParams = async (config) => {
        older_than,
    });
    const { data, oldest } = rawLogs;
-    const normalizedLogs = normalizeLogs(data);
-    const logs = await enrichWithClientInfo(normalizedLogs);

    return {
-        logs,
+        logs: normalizeLogs(data),
        oldest,
        older_than,
        filter,
@ -92,10 +79,8 @@ export const updateLogs = () => async (dispatch, getState) => {
    try {
        const { logs, oldest, older_than } = getState().queryLogs;

-        const enrichedLogs = await enrichWithClientInfo(logs);
-
        dispatch(getLogsSuccess({
-            logs: enrichedLogs,
+            logs,
            oldest,
            older_than,
        }));
--- a/client/src/components/Logs/Cells/ClientCell.js
+++ b/client/src/components/Logs/Cells/ClientCell.js
@ -17,11 +17,8 @@ import { updateLogs } from '../../../actions/queryLogs';
 const ClientCell = ({
    client,
    client_id,
+    client_info,
    domain,
-    info,
-    info: {
-        name, whois_info, disallowed, disallowed_rule,
-    },
    reason,
 }) => {
    const { t } = useTranslation();
@ -33,18 +30,22 @@ const ClientCell = ({

    const autoClient = autoClients.find((autoClient) => autoClient.name === client);
    const source = autoClient?.source;
-    const whoisAvailable = whois_info && Object.keys(whois_info).length > 0;
-    const clientName = name || client_id;
-    const clientInfo = { ...info, name: clientName };
+    const whoisAvailable = client_info && Object.keys(client_info.whois).length > 0;
+    const clientName = client_info?.name || client_id;
+    const clientInfo = client_info && {
+        ...client_info,
+        whois_info: client_info?.whois,
+        name: clientName,
+    };

    const id = nanoid();

    const data = {
        address: client,
        name: clientName,
-        country: whois_info?.country,
-        city: whois_info?.city,
-        network: whois_info?.orgname,
+        country: client_info?.whois?.country,
+        city: client_info?.whois?.city,
+        network: client_info?.whois?.orgname,
        source_label: source,
    };

@ -53,7 +54,7 @@ const ClientCell = ({
    const isFiltered = checkFiltered(reason);

    const nameClass = classNames('w-90 o-hidden d-flex flex-column', {
-        'mt-2': isDetailed && !name && !whoisAvailable,
+        'mt-2': isDetailed && !client_info?.name && !whoisAvailable,
        'white-space--nowrap': isDetailed,
    });

@ -69,7 +70,11 @@ const ClientCell = ({
            confirmMessage,
            buttonKey: blockingClientKey,
            isNotInAllowedList,
-        } = getBlockClientInfo(client, disallowed, disallowed_rule);
+        } = getBlockClientInfo(
+            client,
+            client_info?.disallowed || false,
+            client_info?.disallowed_rule || '',
+        );

        const blockingForClientKey = isFiltered ? 'unblock_for_this_client_only' : 'block_for_this_client_only';
        const clientNameBlockingFor = getBlockingClientName(clients, client);
@ -85,7 +90,11 @@ const ClientCell = ({
                name: blockingClientKey,
                onClick: async () => {
                    if (window.confirm(confirmMessage)) {
-                        await dispatch(toggleClientBlock(client, disallowed, disallowed_rule));
+                        await dispatch(toggleClientBlock(
+                            client,
+                            client_info?.disallowed || false,
+                            client_info?.disallowed_rule || '',
+                        ));
                        await dispatch(updateLogs());
                    }
                },
@ -199,20 +208,18 @@ const ClientCell = ({
 ClientCell.propTypes = {
    client: propTypes.string.isRequired,
    client_id: propTypes.string,
+    client_info: propTypes.shape({
+        ids: propTypes.arrayOf(propTypes.string).isRequired,
+        name: propTypes.string.isRequired,
+        whois: propTypes.shape({
+            country: propTypes.string,
+            city: propTypes.string,
+            orgname: propTypes.string,
+        }).isRequired,
+        disallowed: propTypes.bool.isRequired,
+        disallowed_rule: propTypes.string.isRequired,
+    }),
    domain: propTypes.string.isRequired,
-    info: propTypes.oneOfType([
-        propTypes.string,
-        propTypes.shape({
-            name: propTypes.string.isRequired,
-            whois_info: propTypes.shape({
-                country: propTypes.string,
-                city: propTypes.string,
-                orgname: propTypes.string,
-            }),
-            disallowed: propTypes.bool.isRequired,
-            disallowed_rule: propTypes.string.isRequired,
-        }),
-    ]),
    reason: propTypes.string.isRequired,
 };

--- a/client/src/components/Logs/Cells/index.js
+++ b/client/src/components/Logs/Cells/index.js
@ -29,11 +29,12 @@ import DateCell from './DateCell';
 import DomainCell from './DomainCell';
 import ResponseCell from './ResponseCell';
 import ClientCell from './ClientCell';
-import '../Logs.css';
 import { toggleClientBlock } from '../../../actions/access';
 import { getBlockClientInfo, BUTTON_PREFIX } from './helpers';
 import { updateLogs } from '../../../actions/queryLogs';

+import '../Logs.css';
+
 const Row = memo(({
    style,
    rowProps,
@ -61,9 +62,7 @@ const Row = memo(({
            client,
            domain,
            elapsedMs,
-            info,
-            info: { disallowed, disallowed_rule },
-            reason,
+            client_info,
            response,
            time,
            tracker,
@ -82,11 +81,6 @@ const Row = memo(({
        const autoClient = autoClients
            .find((autoClient) => autoClient.name === client);

-        const { whois_info } = info;
-        const country = whois_info?.country;
-        const city = whois_info?.city;
-        const network = whois_info?.orgname;
-
        const source = autoClient?.source;

        const formattedElapsedMs = formatElapsedMs(elapsedMs, t);
@ -111,7 +105,11 @@ const Row = memo(({
            confirmMessage,
            buttonKey: blockingClientKey,
            isNotInAllowedList,
-        } = getBlockClientInfo(client, disallowed, disallowed_rule);
+        } = getBlockClientInfo(
+            client,
+            client_info?.disallowed || false,
+            client_info?.disallowed_rule || '',
+        );

        const blockingForClientKey = isFiltered ? 'unblock_for_this_client_only' : 'block_for_this_client_only';
        const clientNameBlockingFor = getBlockingClientName(clients, client);
@ -122,7 +120,13 @@ const Row = memo(({

        const onBlockingClientClick = async () => {
            if (window.confirm(confirmMessage)) {
-                await dispatch(toggleClientBlock(client, disallowed, disallowed_rule));
+                await dispatch(
+                    toggleClientBlock(
+                        client,
+                        client_info?.disallowed || false,
+                        client_info?.disallowed_rule || '',
+                    ),
+                );
                await dispatch(updateLogs());
                setModalOpened(false);
            }
@ -177,10 +181,10 @@ const Row = memo(({
            response_code: status,
            client_details: 'title',
            ip_address: client,
-            name: info?.name || client_id,
-            country,
-            city,
-            network,
+            name: client_info?.name || client_id,
+            country: client_info?.whois?.country,
+            city: client_info?.whois?.city,
+            network: client_info?.whois?.orgname,
            source_label: source,
            validated_with_dnssec: dnssec_enabled ? Boolean(answer_dnssec) : false,
            original_response: originalResponse?.join('\n'),
@ -219,15 +223,6 @@ Row.propTypes = {
        client: propTypes.string.isRequired,
        domain: propTypes.string.isRequired,
        elapsedMs: propTypes.string.isRequired,
-        info: propTypes.oneOfType([
-            propTypes.string,
-            propTypes.shape({
-                whois_info: propTypes.shape({
-                    country: propTypes.string,
-                    city: propTypes.string,
-                    orgname: propTypes.string,
-                }),
-            })]),
        response: propTypes.array.isRequired,
        time: propTypes.string.isRequired,
        tracker: propTypes.object,
@ -235,6 +230,17 @@ Row.propTypes = {
        type: propTypes.string.isRequired,
        client_proto: propTypes.string.isRequired,
        client_id: propTypes.string,
+        client_info: propTypes.shape({
+            ids: propTypes.arrayOf(propTypes.string).isRequired,
+            name: propTypes.string.isRequired,
+            whois: propTypes.shape({
+                country: propTypes.string,
+                city: propTypes.string,
+                orgname: propTypes.string,
+            }).isRequired,
+            disallowed: propTypes.bool.isRequired,
+            disallowed_rule: propTypes.string.isRequired,
+        }),
        rules: propTypes.arrayOf(propTypes.shape({
            text: propTypes.string.isRequired,
            filter_list_id: propTypes.number.isRequired,
--- a/client/src/components/Logs/InfiniteTable.js
+++ b/client/src/components/Logs/InfiniteTable.js
@ -56,13 +56,13 @@ const InfiniteTable = ({
    }, []);

    const renderRow = (row, idx) => <Row
-                    key={idx}
-                    rowProps={row}
-                    isSmallScreen={isSmallScreen}
-                    setDetailedDataCurrent={setDetailedDataCurrent}
-                    setButtonType={setButtonType}
-                    setModalOpened={setModalOpened}
-            />;
+        key={idx}
+        rowProps={row}
+        isSmallScreen={isSmallScreen}
+        setDetailedDataCurrent={setDetailedDataCurrent}
+        setButtonType={setButtonType}
+        setModalOpened={setModalOpened}
+    />;

    const isNothingFound = items.length === 0 && !processingGetLogs;

--- a/client/src/helpers/helpers.js
+++ b/client/src/helpers/helpers.js
@ -63,6 +63,7 @@ export const normalizeLogs = (logs) => logs.map((log) => {
        client,
        client_proto,
        client_id,
+        client_info,
        elapsedMs,
        question,
        reason,
@ -101,6 +102,7 @@ export const normalizeLogs = (logs) => logs.map((log) => {
        client,
        client_proto,
        client_id,
+        client_info,
        /* TODO 'filterId' and 'rule' are deprecated, will be removed in 0.106 */
        filterId,
        rule,
--- a/internal/dnsforward/dnsforward.go
+++ b/internal/dnsforward/dnsforward.go
@ -375,5 +375,9 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {

 // IsBlockedIP - return TRUE if this client should be blocked
 func (s *Server) IsBlockedIP(ip net.IP) (bool, string) {
+	if ip == nil {
+		return false, ""
+	}
+
 	return s.access.IsBlockedIP(ip)
 }
--- a/internal/home/clients.go
+++ b/internal/home/clients.go
@ -15,6 +15,7 @@ import (
 	"github.com/AdguardTeam/AdGuardHome/internal/dhcpd"
 	"github.com/AdguardTeam/AdGuardHome/internal/dnsfilter"
 	"github.com/AdguardTeam/AdGuardHome/internal/dnsforward"
+	"github.com/AdguardTeam/AdGuardHome/internal/querylog"
 	"github.com/AdguardTeam/AdGuardHome/internal/util"
 	"github.com/AdguardTeam/dnsproxy/proxy"
 	"github.com/AdguardTeam/dnsproxy/upstream"
@ -60,19 +61,26 @@ const (
 	ClientSourceHostsFile
 )

-// ClientHost information
-type ClientHost struct {
+// RuntimeClient information
+type RuntimeClient struct {
 	Host      string
 	Source    clientSource
-	WhoisInfo [][]string // [[key,value], ...]
+	WhoisInfo *RuntimeClientWhoisInfo
+}
+
+// RuntimeClientWhoisInfo is the filtered WHOIS data for a runtime client.
+type RuntimeClientWhoisInfo struct {
+	City    string `json:"city,omitempty"`
+	Country string `json:"country,omitempty"`
+	Orgname string `json:"orgname,omitempty"`
 }

 type clientsContainer struct {
 	// TODO(a.garipov): Perhaps use a number of separate indices for
 	// different types (string, net.IP, and so on).
-	list    map[string]*Client     // name -> client
-	idIndex map[string]*Client     // ID -> client
-	ipHost  map[string]*ClientHost // IP -> Hostname
+	list    map[string]*Client        // name -> client
+	idIndex map[string]*Client        // ID -> client
+	ipToRC  map[string]*RuntimeClient // IP -> runtime client
 	lock    sync.Mutex

 	allTags map[string]bool
@ -97,7 +105,7 @@ func (clients *clientsContainer) Init(objects []clientObject, dhcpServer *dhcpd.
 	}
 	clients.list = make(map[string]*Client)
 	clients.idIndex = make(map[string]*Client)
-	clients.ipHost = make(map[string]*ClientHost)
+	clients.ipToRC = make(map[string]*RuntimeClient)

 	clients.allTags = make(map[string]bool)
 	for _, t := range clientTags {
@ -128,7 +136,7 @@ func (clients *clientsContainer) Start() {
 	}
 }

-// Reload - reload auto-clients
+// Reload reloads runtime clients.
 func (clients *clientsContainer) Reload() {
 	clients.addFromSystemARP()
 }
@ -248,21 +256,70 @@ func (clients *clientsContainer) Exists(id string, source clientSource) (ok bool
 		return true
 	}

-	var ch *ClientHost
-	ch, ok = clients.ipHost[id]
+	var rc *RuntimeClient
+	rc, ok = clients.ipToRC[id]
 	if !ok {
 		return false
 	}

 	// Return false if the new source has higher priority.
-	return source <= ch.Source
+	return source <= rc.Source
 }

 func copyStrings(a []string) (b []string) {
 	return append(b, a...)
 }

-// Find searches for a client by its ID.
+func toQueryLogWhois(wi *RuntimeClientWhoisInfo) (cw *querylog.ClientWhois) {
+	if wi == nil {
+		return &querylog.ClientWhois{}
+	}
+
+	return &querylog.ClientWhois{
+		City:    wi.City,
+		Country: wi.Country,
+		Orgname: wi.Orgname,
+	}
+}
+
+// findMultiple is a wrapper around Find to make it a valid client finder for
+// the query log.  err is always nil.
+func (clients *clientsContainer) findMultiple(ids []string) (c *querylog.Client, err error) {
+	for _, id := range ids {
+		var name string
+		var foundIDs []string
+		whois := &querylog.ClientWhois{}
+
+		c, ok := clients.Find(id)
+		if ok {
+			name = c.Name
+			foundIDs = c.IDs
+		} else {
+			var rc RuntimeClient
+			rc, ok = clients.FindRuntimeClient(id)
+			if !ok {
+				continue
+			}
+
+			foundIDs = []string{rc.Host}
+			whois = toQueryLogWhois(rc.WhoisInfo)
+		}
+
+		ip := net.ParseIP(id)
+		disallowed, disallowedRule := clients.dnsServer.IsBlockedIP(ip)
+
+		return &querylog.Client{
+			Name:           name,
+			DisallowedRule: disallowedRule,
+			Whois:          whois,
+			IDs:            foundIDs,
+			Disallowed:     disallowed,
+		}, nil
+	}
+
+	return nil, nil
+}
+
 func (clients *clientsContainer) Find(id string) (c *Client, ok bool) {
 	clients.lock.Lock()
 	defer clients.lock.Unlock()
@ -361,21 +418,22 @@ func (clients *clientsContainer) findLocked(id string) (c *Client, ok bool) {
 	return nil, false
 }

-// FindAutoClient - search for an auto-client by IP
-func (clients *clientsContainer) FindAutoClient(ip string) (ClientHost, bool) {
+// FindRuntimeClient finds a runtime client by their IP.
+func (clients *clientsContainer) FindRuntimeClient(ip string) (RuntimeClient, bool) {
 	ipAddr := net.ParseIP(ip)
 	if ipAddr == nil {
-		return ClientHost{}, false
+		return RuntimeClient{}, false
 	}

 	clients.lock.Lock()
 	defer clients.lock.Unlock()

-	ch, ok := clients.ipHost[ip]
+	rc, ok := clients.ipToRC[ip]
 	if ok {
-		return *ch, true
+		return *rc, true
 	}
-	return ClientHost{}, false
+
+	return RuntimeClient{}, false
 }

 // check validates the client.
@ -558,9 +616,7 @@ func (clients *clientsContainer) Update(name string, c *Client) (err error) {
 }

 // SetWhoisInfo sets the WHOIS information for a client.
-//
-// TODO(a.garipov): Perhaps replace [][]string with map[string]string.
-func (clients *clientsContainer) SetWhoisInfo(ip string, info [][]string) {
+func (clients *clientsContainer) SetWhoisInfo(ip string, wi *RuntimeClientWhoisInfo) {
 	clients.lock.Lock()
 	defer clients.lock.Unlock()

@ -570,21 +626,24 @@ func (clients *clientsContainer) SetWhoisInfo(ip string, info [][]string) {
 		return
 	}

-	ch, ok := clients.ipHost[ip]
+	rc, ok := clients.ipToRC[ip]
 	if ok {
-		ch.WhoisInfo = info
-		log.Debug("clients: set whois info for auto-client %s: %q", ch.Host, info)
+		rc.WhoisInfo = wi
+		log.Debug("clients: set whois info for runtime client %s: %+v", rc.Host, wi)

 		return
 	}

-	// Create a ClientHost implicitly so that we don't do this check again
-	ch = &ClientHost{
+	// Create a RuntimeClient implicitly so that we don't do this check
+	// again.
+	rc = &RuntimeClient{
 		Source: ClientSourceWHOIS,
 	}
-	ch.WhoisInfo = info
-	clients.ipHost[ip] = ch
-	log.Debug("clients: set whois info for auto-client with IP %s: %q", ip, info)
+
+	rc.WhoisInfo = wi
+	clients.ipToRC[ip] = rc
+
+	log.Debug("clients: set whois info for runtime client with ip %s: %+v", ip, wi)
 }

 // AddHost adds a new IP-hostname pairing.  The priorities of the sources is
@ -600,24 +659,25 @@ func (clients *clientsContainer) AddHost(ip, host string, src clientSource) (ok

 // addHostLocked adds a new IP-hostname pairing.  For internal use only.
 func (clients *clientsContainer) addHostLocked(ip, host string, src clientSource) (ok bool) {
-	var ch *ClientHost
-	ch, ok = clients.ipHost[ip]
+	var rc *RuntimeClient
+	rc, ok = clients.ipToRC[ip]
 	if ok {
-		if ch.Source > src {
+		if rc.Source > src {
 			return false
 		}

-		ch.Source = src
+		rc.Source = src
 	} else {
-		ch = &ClientHost{
-			Host:   host,
-			Source: src,
+		rc = &RuntimeClient{
+			Host:      host,
+			Source:    src,
+			WhoisInfo: &RuntimeClientWhoisInfo{},
 		}

-		clients.ipHost[ip] = ch
+		clients.ipToRC[ip] = rc
 	}

-	log.Debug("clients: added %q -> %q [%d]", ip, host, len(clients.ipHost))
+	log.Debug("clients: added %q -> %q [%d]", ip, host, len(clients.ipToRC))

 	return true
 }
@ -625,9 +685,9 @@ func (clients *clientsContainer) addHostLocked(ip, host string, src clientSource
 // rmHostsBySrc removes all entries that match the specified source.
 func (clients *clientsContainer) rmHostsBySrc(src clientSource) {
 	n := 0
-	for k, v := range clients.ipHost {
+	for k, v := range clients.ipToRC {
 		if v.Source == src {
-			delete(clients.ipHost, k)
+			delete(clients.ipToRC, k)
 			n++
 		}
 	}
--- a/internal/home/clients_test.go
+++ b/internal/home/clients_test.go
@ -163,17 +163,20 @@ func TestClientsWhois(t *testing.T) {
 		testing: true,
 	}
 	clients.Init(nil, nil, nil)
-	whois := [][]string{{"orgname", "orgname-val"}, {"country", "country-val"}}
+	whois := &RuntimeClientWhoisInfo{
+		Country: "AU",
+		Orgname: "Example Org",
+	}

 	t.Run("new_client", func(t *testing.T) {
 		clients.SetWhoisInfo("1.1.1.255", whois)

-		require.NotNil(t, clients.ipHost["1.1.1.255"])
-		h := clients.ipHost["1.1.1.255"]
+		require.NotNil(t, clients.ipToRC["1.1.1.255"])

-		require.Len(t, h.WhoisInfo, 2)
-		require.Len(t, h.WhoisInfo[0], 2)
-		assert.Equal(t, "orgname-val", h.WhoisInfo[0][1])
+		h := clients.ipToRC["1.1.1.255"]
+		require.NotNil(t, h)
+
+		assert.Equal(t, h.WhoisInfo, whois)
 	})

 	t.Run("existing_auto-client", func(t *testing.T) {
@ -183,12 +186,11 @@ func TestClientsWhois(t *testing.T) {

 		clients.SetWhoisInfo("1.1.1.1", whois)

-		require.NotNil(t, clients.ipHost["1.1.1.1"])
-		h := clients.ipHost["1.1.1.1"]
+		require.NotNil(t, clients.ipToRC["1.1.1.1"])
+		h := clients.ipToRC["1.1.1.1"]
+		require.NotNil(t, h)

-		require.Len(t, h.WhoisInfo, 2)
-		require.Len(t, h.WhoisInfo[0], 2)
-		assert.Equal(t, "orgname-val", h.WhoisInfo[0][1])
+		assert.Equal(t, h.WhoisInfo, whois)
 	})

 	t.Run("can't_set_manually-added", func(t *testing.T) {
@ -200,7 +202,7 @@ func TestClientsWhois(t *testing.T) {
 		assert.True(t, ok)

 		clients.SetWhoisInfo("1.1.1.2", whois)
-		require.Nil(t, clients.ipHost["1.1.1.2"])
+		require.Nil(t, clients.ipToRC["1.1.1.2"])
 		assert.True(t, clients.Del("client1"))
 	})
 }
--- a/internal/home/clientshttp.go
+++ b/internal/home/clientshttp.go
@ -22,7 +22,7 @@ type clientJSON struct {

 	Upstreams []string `json:"upstreams"`

-	WhoisInfo map[string]string `json:"whois_info"`
+	WhoisInfo *RuntimeClientWhoisInfo `json:"whois_info"`

 	// Disallowed - if true -- client's IP is not disallowed
 	// Otherwise, it is blocked.
@ -34,18 +34,18 @@ type clientJSON struct {
 	DisallowedRule string `json:"disallowed_rule"`
 }

-type clientHostJSON struct {
+type runtimeClientJSON struct {
+	WhoisInfo *RuntimeClientWhoisInfo `json:"whois_info"`
+
 	IP     string `json:"ip"`
 	Name   string `json:"name"`
 	Source string `json:"source"`
-
-	WhoisInfo map[string]string `json:"whois_info"`
 }

 type clientListJSON struct {
-	Clients     []clientJSON     `json:"clients"`
-	AutoClients []clientHostJSON `json:"auto_clients"`
-	Tags        []string         `json:"supported_tags"`
+	Clients        []clientJSON        `json:"clients"`
+	RuntimeClients []runtimeClientJSON `json:"auto_clients"`
+	Tags           []string            `json:"supported_tags"`
 }

 // respond with information about configured clients
@ -53,18 +53,21 @@ func (clients *clientsContainer) handleGetClients(w http.ResponseWriter, _ *http
 	data := clientListJSON{}

 	clients.lock.Lock()
+	defer clients.lock.Unlock()
+
 	for _, c := range clients.list {
 		cj := clientToJSON(c)
 		data.Clients = append(data.Clients, cj)
 	}
-	for ip, ch := range clients.ipHost {
-		cj := clientHostJSON{
-			IP:   ip,
-			Name: ch.Host,
+	for ip, rc := range clients.ipToRC {
+		cj := runtimeClientJSON{
+			IP:        ip,
+			Name:      rc.Host,
+			WhoisInfo: rc.WhoisInfo,
 		}

 		cj.Source = "etc/hosts"
-		switch ch.Source {
+		switch rc.Source {
 		case ClientSourceDHCP:
 			cj.Source = "DHCP"
 		case ClientSourceRDNS:
@ -75,14 +78,8 @@ func (clients *clientsContainer) handleGetClients(w http.ResponseWriter, _ *http
 			cj.Source = "WHOIS"
 		}

-		cj.WhoisInfo = map[string]string{}
-		for _, wi := range ch.WhoisInfo {
-			cj.WhoisInfo[wi[0]] = wi[1]
-		}
-
-		data.AutoClients = append(data.AutoClients, cj)
+		data.RuntimeClients = append(data.RuntimeClients, cj)
 	}
-	clients.lock.Unlock()

 	data.Tags = clientTags

@ -129,21 +126,21 @@ func clientToJSON(c *Client) clientJSON {
 		BlockedServices:          c.BlockedServices,

 		Upstreams: c.Upstreams,
+
+		WhoisInfo: &RuntimeClientWhoisInfo{},
 	}
+
 	return cj
 }

-// Convert ClientHost object to JSON
-func clientHostToJSON(ip string, ch ClientHost) clientJSON {
-	cj := clientJSON{
-		Name: ch.Host,
-		IDs:  []string{ip},
+// runtimeClientToJSON converts a RuntimeClient into a JSON struct.
+func runtimeClientToJSON(ip string, rc RuntimeClient) (cj clientJSON) {
+	cj = clientJSON{
+		Name:      rc.Host,
+		IDs:       []string{ip},
+		WhoisInfo: rc.WhoisInfo,
 	}

-	cj.WhoisInfo = map[string]string{}
-	for _, wi := range ch.WhoisInfo {
-		cj.WhoisInfo[wi[0]] = wi[1]
-	}
 	return cj
 }

@ -268,7 +265,7 @@ func (clients *clientsContainer) findTemporary(ip net.IP, idStr string) (cj clie
 		return cj, false
 	}

-	ch, ok := clients.FindAutoClient(idStr)
+	rc, ok := clients.FindRuntimeClient(idStr)
 	if !ok {
 		// It is still possible that the IP used to be in the runtime
 		// clients list, but then the server was reloaded.  So, check
@ -284,12 +281,13 @@ func (clients *clientsContainer) findTemporary(ip net.IP, idStr string) (cj clie
 			IDs:            []string{idStr},
 			Disallowed:     disallowed,
 			DisallowedRule: rule,
+			WhoisInfo:      &RuntimeClientWhoisInfo{},
 		}

 		return cj, true
 	}

-	cj = clientHostToJSON(idStr, ch)
+	cj = runtimeClientToJSON(idStr, rc)
 	cj.Disallowed, cj.DisallowedRule = clients.dnsServer.IsBlockedIP(ip)

 	return cj, true
--- a/internal/home/config.go
+++ b/internal/home/config.go
@ -285,7 +285,7 @@ func (c *configuration) write() error {
 		Context.queryLog.WriteDiskConfig(&dc)
 		config.DNS.QueryLogEnabled = dc.Enabled
 		config.DNS.QueryLogFileEnabled = dc.FileEnabled
-		config.DNS.QueryLogInterval = dc.Interval
+		config.DNS.QueryLogInterval = dc.RotationIvl
 		config.DNS.QueryLogMemSize = dc.MemSize
 		config.DNS.AnonymizeClientIP = dc.AnonymizeClientIP
 	}
--- a/internal/home/dns.go
+++ b/internal/home/dns.go
@ -42,15 +42,17 @@ func initDNSServer() error {
 	if err != nil {
 		return fmt.Errorf("couldn't initialize statistics module")
 	}
+
 	conf := querylog.Config{
-		Enabled:           config.DNS.QueryLogEnabled,
-		FileEnabled:       config.DNS.QueryLogFileEnabled,
-		BaseDir:           baseDir,
-		Interval:          config.DNS.QueryLogInterval,
-		MemSize:           config.DNS.QueryLogMemSize,
-		AnonymizeClientIP: config.DNS.AnonymizeClientIP,
 		ConfigModified:    onConfigModified,
 		HTTPRegister:      httpRegister,
+		FindClient:        Context.clients.findMultiple,
+		BaseDir:           baseDir,
+		RotationIvl:       config.DNS.QueryLogInterval,
+		MemSize:           config.DNS.QueryLogMemSize,
+		Enabled:           config.DNS.QueryLogEnabled,
+		FileEnabled:       config.DNS.QueryLogFileEnabled,
+		AnonymizeClientIP: config.DNS.AnonymizeClientIP,
 	}
 	Context.queryLog = querylog.New(conf)

--- a/internal/home/rdns_test.go
+++ b/internal/home/rdns_test.go
@ -84,7 +84,7 @@ func TestRDNS_Begin(t *testing.T) {
 			clients: &clientsContainer{
 				list:    map[string]*Client{},
 				idIndex: tc.cliIDIndex,
-				ipHost:  map[string]*ClientHost{},
+				ipToRC:  map[string]*RuntimeClient{},
 				allTags: map[string]bool{},
 			},
 		}
@ -229,7 +229,7 @@ func TestRDNS_WorkerLoop(t *testing.T) {
 		cc := &clientsContainer{
 			list:    map[string]*Client{},
 			idIndex: map[string]*Client{},
-			ipHost:  map[string]*ClientHost{},
+			ipToRC:  map[string]*RuntimeClient{},
 			allTags: map[string]bool{},
 		}
 		ch := make(chan net.IP)
--- a/internal/home/whois.go
+++ b/internal/home/whois.go
@ -182,29 +182,31 @@ func (w *Whois) queryAll(ctx context.Context, target string) (string, error) {
 }

 // Request WHOIS information
-func (w *Whois) process(ctx context.Context, ip net.IP) [][]string {
-	data := [][]string{}
+func (w *Whois) process(ctx context.Context, ip net.IP) (wi *RuntimeClientWhoisInfo) {
 	resp, err := w.queryAll(ctx, ip.String())
 	if err != nil {
 		log.Debug("Whois: error: %s  IP:%s", err, ip)
-		return data
+
+		return nil
 	}

 	log.Debug("Whois: IP:%s  response: %d bytes", ip, len(resp))

 	m := whoisParse(resp)

-	keys := []string{"orgname", "country", "city"}
-	for _, k := range keys {
-		v, found := m[k]
-		if !found {
-			continue
-		}
-		pair := []string{k, v}
-		data = append(data, pair)
+	wi = &RuntimeClientWhoisInfo{
+		City:    m["city"],
+		Country: m["country"],
+		Orgname: m["orgname"],
 	}

-	return data
+	// Don't return an empty struct so that the frontend doesn't get
+	// confused.
+	if *wi == (RuntimeClientWhoisInfo{}) {
+		return nil
+	}
+
+	return wi
 }

 // Begin - begin requesting WHOIS info
@ -234,11 +236,9 @@ func (w *Whois) Begin(ip net.IP) {
 // workerLoop processes the IP addresses it got from the channel and associates
 // the retrieving WHOIS info with a client.
 func (w *Whois) workerLoop() {
-	for {
-		ip := <-w.ipChan
-
+	for ip := range w.ipChan {
 		info := w.process(context.Background(), ip)
-		if len(info) == 0 {
+		if info == nil {
 			continue
 		}

--- a/internal/querylog/client.go
+++ b/internal/querylog/client.go
@ -0,0 +1,33 @@
+package querylog
+
+// Client is the information required by the query log to match against clients
+// during searches.
+type Client struct {
+	Name           string       `json:"name"`
+	DisallowedRule string       `json:"disallowed_rule"`
+	Whois          *ClientWhois `json:"whois,omitempty"`
+	IDs            []string     `json:"ids"`
+	Disallowed     bool         `json:"disallowed"`
+}
+
+// ClientWhois is the filtered WHOIS data for the client.
+//
+// TODO(a.garipov): Merge with home.RuntimeClientWhoisInfo after the
+// refactoring is done.
+type ClientWhois struct {
+	City    string `json:"city,omitempty"`
+	Country string `json:"country,omitempty"`
+	Orgname string `json:"orgname,omitempty"`
+}
+
+// clientCacheKey is the key by which a cached client information is found.
+type clientCacheKey struct {
+	clientID string
+	ip       string
+}
+
+// clientCache is the cache of client information found throughout a request to
+// the query log API.  It is used both to speed up the lookup, as well as to
+// make sure that changes in client data between two lookups don't create
+// discrepancies in our response.
+type clientCache map[clientCacheKey]*Client
--- a/internal/querylog/http.go
+++ b/internal/querylog/http.go
@ -68,7 +68,7 @@ func (l *queryLog) handleQueryLogClear(_ http.ResponseWriter, _ *http.Request) {
 func (l *queryLog) handleQueryLogInfo(w http.ResponseWriter, r *http.Request) {
 	resp := qlogConfig{}
 	resp.Enabled = l.conf.Enabled
-	resp.Interval = l.conf.Interval
+	resp.Interval = l.conf.RotationIvl
 	resp.AnonymizeClientIP = l.conf.AnonymizeClientIP

 	jsonVal, err := json.Marshal(resp)
@ -104,7 +104,7 @@ func (l *queryLog) handleQueryLogConfig(w http.ResponseWriter, r *http.Request)
 		conf.Enabled = d.Enabled
 	}
 	if req.Exists("interval") {
-		conf.Interval = d.Interval
+		conf.RotationIvl = d.Interval
 	}
 	if req.Exists("anonymize_client_ip") {
 		conf.AnonymizeClientIP = d.AnonymizeClientIP
--- a/internal/querylog/json.go
+++ b/internal/querylog/json.go
@ -71,6 +71,7 @@ func (l *queryLog) logEntryToJSONEntry(entry *logEntry) (jsonEntry jobject) {
 		"elapsedMs":    strconv.FormatFloat(entry.Elapsed.Seconds()*1000, 'f', -1, 64),
 		"time":         entry.Time.Format(time.RFC3339Nano),
 		"client":       l.getClientIP(entry.IP),
+		"client_info":  entry.client,
 		"client_proto": entry.ClientProto,
 		"upstream":     entry.Upstream,
 		"question": jobject{
--- a/internal/querylog/qlog.go
+++ b/internal/querylog/qlog.go
@ -6,7 +6,6 @@ import (
 	"fmt"
 	"net"
 	"os"
-	"path/filepath"
 	"strings"
 	"sync"
 	"time"
@ -22,12 +21,17 @@ const (

 // queryLog is a structure that writes and reads the DNS query log
 type queryLog struct {
+	findClient func(ids []string) (c *Client, err error)
+
 	conf    *Config
 	lock    sync.Mutex
 	logFile string // path to the log file

-	bufferLock    sync.RWMutex
-	buffer        []*logEntry
+	// bufferLock protects buffer.
+	bufferLock sync.RWMutex
+	// buffer contains recent log entries.
+	buffer []*logEntry
+
 	fileFlushLock sync.Mutex // synchronize a file-flushing goroutine and main thread
 	flushPending  bool       // don't start another goroutine while the previous one is still running
 	fileWriteLock sync.Mutex
@ -64,6 +68,9 @@ func NewClientProto(s string) (cp ClientProto, err error) {

 // logEntry - represents a single log entry
 type logEntry struct {
+	// client is the found client information, if any.
+	client *Client
+
 	IP   net.IP    `json:"IP"` // Client IP
 	Time time.Time `json:"T"`

@ -82,18 +89,6 @@ type logEntry struct {
 	Upstream string `json:",omitempty"` // if empty, means it was cached
 }

-// create a new instance of the query log
-func newQueryLog(conf Config) *queryLog {
-	l := queryLog{}
-	l.logFile = filepath.Join(conf.BaseDir, queryLogFileName)
-	l.conf = &Config{}
-	*l.conf = conf
-	if !checkInterval(l.conf.Interval) {
-		l.conf.Interval = 1
-	}
-	return &l
-}
-
 func (l *queryLog) Start() {
 	if l.conf.HTTPRegister != nil {
 		l.initWeb()
@ -138,12 +133,16 @@ func (l *queryLog) clear() {
 }

 func (l *queryLog) Add(params AddParams) {
+	var err error
+
 	if !l.conf.Enabled {
 		return
 	}

-	if params.Question == nil || len(params.Question.Question) != 1 || len(params.Question.Question[0].Name) == 0 ||
-		params.ClientIP == nil {
+	err = params.validate()
+	if err != nil {
+		log.Error("querylog: adding record: %s, skipping", err)
+
 		return
 	}

@ -168,20 +167,26 @@ func (l *queryLog) Add(params AddParams) {
 	entry.QClass = dns.Class(q.Qclass).String()

 	if params.Answer != nil {
-		a, err := params.Answer.Pack()
+		var a []byte
+		a, err = params.Answer.Pack()
 		if err != nil {
-			log.Info("Querylog: Answer.Pack(): %s", err)
+			log.Error("querylog: Answer.Pack(): %s", err)
+
 			return
 		}
+
 		entry.Answer = a
 	}

 	if params.OrigAnswer != nil {
-		a, err := params.OrigAnswer.Pack()
+		var a []byte
+		a, err = params.OrigAnswer.Pack()
 		if err != nil {
-			log.Info("Querylog: OrigAnswer.Pack(): %s", err)
+			log.Error("querylog: OrigAnswer.Pack(): %s", err)
+
 			return
 		}
+
 		entry.OrigAnswer = a
 	}

--- a/internal/querylog/qlog_test.go
+++ b/internal/querylog/qlog_test.go
@ -26,7 +26,7 @@ func TestQueryLog(t *testing.T) {
 	l := newQueryLog(Config{
 		Enabled:     true,
 		FileEnabled: true,
-		Interval:    1,
+		RotationIvl: 1,
 		MemSize:     100,
 		BaseDir:     t.TempDir(),
 	})
@ -127,10 +127,10 @@ func TestQueryLog(t *testing.T) {

 func TestQueryLogOffsetLimit(t *testing.T) {
 	l := newQueryLog(Config{
-		Enabled:  true,
-		Interval: 1,
-		MemSize:  100,
-		BaseDir:  t.TempDir(),
+		Enabled:     true,
+		RotationIvl: 1,
+		MemSize:     100,
+		BaseDir:     t.TempDir(),
 	})

 	const (
@ -202,7 +202,7 @@ func TestQueryLogMaxFileScanEntries(t *testing.T) {
 	l := newQueryLog(Config{
 		Enabled:     true,
 		FileEnabled: true,
-		Interval:    1,
+		RotationIvl: 1,
 		MemSize:     100,
 		BaseDir:     t.TempDir(),
 	})
@ -230,7 +230,7 @@ func TestQueryLogFileDisabled(t *testing.T) {
 	l := newQueryLog(Config{
 		Enabled:     true,
 		FileEnabled: false,
-		Interval:    1,
+		RotationIvl: 1,
 		MemSize:     2,
 		BaseDir:     t.TempDir(),
 	})
--- a/internal/querylog/querylog.go
+++ b/internal/querylog/querylog.go
@ -3,9 +3,12 @@ package querylog
 import (
 	"net"
 	"net/http"
+	"path/filepath"
 	"time"

+	"github.com/AdguardTeam/AdGuardHome/internal/agherr"
 	"github.com/AdguardTeam/AdGuardHome/internal/dnsfilter"
+	"github.com/AdguardTeam/golibs/log"
 	"github.com/miekg/dns"
 )

@ -25,18 +28,37 @@ type QueryLog interface {

 // Config - configuration object
 type Config struct {
-	Enabled           bool   // enable the module
-	FileEnabled       bool   // write logs to file
-	BaseDir           string // directory where log file is stored
-	Interval          uint32 // interval to rotate logs (in days)
-	MemSize           uint32 // number of entries kept in memory before they are flushed to disk
-	AnonymizeClientIP bool   // anonymize clients' IP addresses
-
-	// Called when the configuration is changed by HTTP request
+	// ConfigModified is called when the configuration is changed, for
+	// example by HTTP requests.
 	ConfigModified func()

-	// Register an HTTP handler
+	// HTTPRegister registers an HTTP handler.
 	HTTPRegister func(string, string, func(http.ResponseWriter, *http.Request))
+
+	// FindClient returns client information by their IDs.
+	FindClient func(ids []string) (c *Client, err error)
+
+	// BaseDir is the base directory for log files.
+	BaseDir string
+
+	// RotationIvl is the interval for log rotation, in days.  After that
+	// period, the old log file will be renamed, NOT deleted, so the actual
+	// log retention time is twice the interval.
+	RotationIvl uint32
+
+	// MemSize is the number of entries kept in a memory buffer before they
+	// are flushed to disk.
+	MemSize uint32
+
+	// Enabled tells if the query log is enabled.
+	Enabled bool
+
+	// FileEnabled tells if the query log writes logs to files.
+	FileEnabled bool
+
+	// AnonymizeClientIP tells if the query log should anonymize clients' IP
+	// addresses.
+	AnonymizeClientIP bool
 }

 // AddParams - parameters for Add()
@ -52,7 +74,52 @@ type AddParams struct {
 	ClientProto ClientProto
 }

-// New - create a new instance of the query log
-func New(conf Config) QueryLog {
+// validate returns an error if the parameters aren't valid.
+func (p *AddParams) validate() (err error) {
+	switch {
+	case p.Question == nil:
+		return agherr.Error("question is nil")
+	case len(p.Question.Question) != 1:
+		return agherr.Error("more than one question")
+	case len(p.Question.Question[0].Name) == 0:
+		return agherr.Error("no host in question")
+	case p.ClientIP == nil:
+		return agherr.Error("no client ip")
+	default:
+		return nil
+	}
+}
+
+// New creates a new instance of the query log.
+func New(conf Config) (ql QueryLog) {
 	return newQueryLog(conf)
 }
+
+// newQueryLog crates a new queryLog.
+func newQueryLog(conf Config) (l *queryLog) {
+	findClient := conf.FindClient
+	if findClient == nil {
+		findClient = func(_ []string) (_ *Client, _ error) {
+			return nil, nil
+		}
+	}
+
+	l = &queryLog{
+		findClient: findClient,
+
+		logFile: filepath.Join(conf.BaseDir, queryLogFileName),
+	}
+
+	l.conf = &Config{}
+	*l.conf = conf
+
+	if !checkInterval(conf.RotationIvl) {
+		log.Info(
+			"querylog: warning: unsupported rotation interval %d, setting to 1 day",
+			conf.RotationIvl,
+		)
+		l.conf.RotationIvl = 1
+	}
+
+	return l
+}
--- a/internal/querylog/querylogfile.go
+++ b/internal/querylog/querylogfile.go
@ -129,7 +129,7 @@ func (l *queryLog) readFileFirstTimeValue() int64 {
 }

 func (l *queryLog) periodicRotate() {
-	intervalSeconds := uint64(l.conf.Interval) * 24 * 60 * 60
+	intervalSeconds := uint64(l.conf.RotationIvl) * 24 * 60 * 60
 	for {
 		oldest := l.readFileFirstTimeValue()
 		if uint64(oldest)+intervalSeconds <= uint64(time.Now().Unix()) {
--- a/internal/querylog/search.go
+++ b/internal/querylog/search.go
@ -8,6 +8,67 @@ import (
 	"github.com/AdguardTeam/golibs/log"
 )

+// client finds the client info, if any, by its client ID and IP address,
+// optionally checking the provided cache.  It will use the IP address
+// regardless of if the IP anonymization is enabled now, because the
+// anonymization could have been disabled in the past, and client will try to
+// find those records as well.
+func (l *queryLog) client(clientID, ip string, cache clientCache) (c *Client, err error) {
+	cck := clientCacheKey{clientID: clientID, ip: ip}
+	if c = cache[cck]; c != nil {
+		return c, nil
+	}
+
+	var ids []string
+	if clientID != "" {
+		ids = append(ids, clientID)
+	}
+
+	if ip != "" {
+		ids = append(ids, ip)
+	}
+
+	c, err = l.findClient(ids)
+	if err != nil {
+		return nil, err
+	}
+
+	if cache != nil {
+		cache[cck] = c
+	}
+
+	return c, nil
+}
+
+// searchMemory looks up log records which are currently in the in-memory
+// buffer.  It optionally uses the client cache, if provided.  It also returns
+// the total amount of records in the buffer at the moment of searching.
+func (l *queryLog) searchMemory(params *searchParams, cache clientCache) (entries []*logEntry, total int) {
+	l.bufferLock.Lock()
+	defer l.bufferLock.Unlock()
+
+	// Go through the buffer in the reverse order, from newer to older.
+	var err error
+	for i := len(l.buffer) - 1; i >= 0; i-- {
+		e := l.buffer[i]
+
+		e.client, err = l.client(e.ClientID, e.IP.String(), cache)
+		if err != nil {
+			msg := "querylog: enriching memory record at time %s" +
+				" for client %q (client id %q): %s"
+			log.Error(msg, e.Time, e.IP, e.ClientID, err)
+
+			// Go on and try to match anyway.
+		}
+
+		if params.match(e) {
+			entries = append(entries, e)
+		}
+	}
+
+	return entries, len(l.buffer)
+}
+
 // search - searches log entries in the query log using specified parameters
 // returns the list of entries found + time of the oldest entry
 func (l *queryLog) search(params *searchParams) ([]*logEntry, time.Time) {
@ -17,26 +78,11 @@ func (l *queryLog) search(params *searchParams) ([]*logEntry, time.Time) {
 		return []*logEntry{}, time.Time{}
 	}

-	// add from file
-	fileEntries, oldest, total := l.searchFiles(params)
+	cache := clientCache{}
+	fileEntries, oldest, total := l.searchFiles(params, cache)
+	memoryEntries, bufLen := l.searchMemory(params, cache)
+	total += bufLen

-	// add from memory buffer
-	l.bufferLock.Lock()
-	total += len(l.buffer)
-	memoryEntries := make([]*logEntry, 0)
-
-	// go through the buffer in the reverse order
-	// from NEWER to OLDER
-	for i := len(l.buffer) - 1; i >= 0; i-- {
-		entry := l.buffer[i]
-		if !params.match(entry) {
-			continue
-		}
-		memoryEntries = append(memoryEntries, entry)
-	}
-	l.bufferLock.Unlock()
-
-	// limits
 	totalLimit := params.offset + params.limit

 	// now let's get a unified collection
@ -74,18 +120,15 @@ func (l *queryLog) search(params *searchParams) ([]*logEntry, time.Time) {
 	return entries, oldest
 }

-// searchFiles reads log entries from all log files and applies the specified search criteria.
-// IMPORTANT: this method does not scan more than "maxSearchEntries" so you
-// may need to call it many times.
-//
-// it returns:
-// * an array of log entries that we have read
-// * time of the oldest processed entry (even if it was discarded)
-// * total number of processed entries (including discarded).
-func (l *queryLog) searchFiles(params *searchParams) ([]*logEntry, time.Time, int) {
-	entries := make([]*logEntry, 0)
-	oldest := time.Time{}
-
+// searchFiles looks up log records from all log files.  It optionally uses the
+// client cache, if provided.  searchFiles does not scan more than
+// maxFileScanEntries so callers may need to call it several times to get all
+// results.  oldset and total are the time of the oldest processed entry and the
+// total number of processed entries, including discarded ones, correspondingly.
+func (l *queryLog) searchFiles(
+	params *searchParams,
+	cache clientCache,
+) (entries []*logEntry, oldest time.Time, total int) {
 	files := []string{
 		l.logFile + ".1",
 		l.logFile,
@ -104,40 +147,43 @@ func (l *queryLog) searchFiles(params *searchParams) ([]*logEntry, time.Time, in
 	} else {
 		err = r.SeekTS(params.olderThan.UnixNano())
 		if err == nil {
-			// Read to the next record right away
-			// The one that was specified in the "oldest" param is not needed,
-			// we need only the one next to it
+			// Read to the next record, because we only need the one
+			// that goes after it.
 			_, err = r.ReadNext()
 		}
 	}

 	if err != nil {
-		log.Debug("Cannot SeekTS() to %v: %v", params.olderThan, err)
+		log.Debug("querylog: cannot seek to %s: %s", params.olderThan, err)
+
 		return entries, oldest, 0
 	}

 	totalLimit := params.offset + params.limit
-	total := 0
 	oldestNano := int64(0)
-	// By default, we do not scan more than "maxFileScanEntries" at once
-	// The idea is to make search calls faster so that the UI could handle it and show something
-	// This behavior can be overridden if "maxFileScanEntries" is set to 0
+
+	// By default, we do not scan more than maxFileScanEntries at once.
+	// The idea is to make search calls faster so that the UI could handle
+	// it and show something quicker.  This behavior can be overridden if
+	// maxFileScanEntries is set to 0.
 	for total < params.maxFileScanEntries || params.maxFileScanEntries <= 0 {
-		var entry *logEntry
+		var e *logEntry
 		var ts int64
-		entry, ts, err = l.readNextEntry(r, params)
-		if err == io.EOF {
-			// there's nothing to read anymore
-			break
+		e, ts, err = l.readNextEntry(r, params, cache)
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+
+			log.Error("querylog: reading next entry: %s", err)
 		}

 		oldestNano = ts
 		total++

-		if entry != nil {
-			entries = append(entries, entry)
+		if e != nil {
+			entries = append(entries, e)
 			if len(entries) == totalLimit {
-				// Do not read more than "totalLimit" records at once
 				break
 			}
 		}
@ -146,36 +192,46 @@ func (l *queryLog) searchFiles(params *searchParams) ([]*logEntry, time.Time, in
 	if oldestNano != 0 {
 		oldest = time.Unix(0, oldestNano)
 	}
+
 	return entries, oldest, total
 }

-// readNextEntry - reads the next log entry and checks if it matches the search criteria (getDataParams)
-//
-// returns:
-// * log entry that matches search criteria or null if it was discarded (or if there's nothing to read)
-// * timestamp of the processed log entry
-// * error if we can't read anymore
-func (l *queryLog) readNextEntry(r *QLogReader, params *searchParams) (*logEntry, int64, error) {
-	line, err := r.ReadNext()
+// readNextEntry reads the next log entry and checks if it matches the search
+// criteria.  It optionally uses the client cache, if provided.  e is nil if the
+// entry doesn't match the search criteria.  ts is the timestamp of the
+// processed entry.
+func (l *queryLog) readNextEntry(
+	r *QLogReader,
+	params *searchParams,
+	cache clientCache,
+) (e *logEntry, ts int64, err error) {
+	var line string
+	line, err = r.ReadNext()
 	if err != nil {
 		return nil, 0, err
 	}

-	// Read the log record timestamp right away
-	timestamp := readQLogTimestamp(line)
+	e = &logEntry{}
+	decodeLogEntry(e, line)

-	// Quick check without deserializing log entry
-	if !params.quickMatch(line) {
-		return nil, timestamp, nil
+	e.client, err = l.client(e.ClientID, e.IP.String(), cache)
+	if err != nil {
+		log.Error(
+			"querylog: enriching file record at time %s"+
+				" for client %q (client id %q): %s",
+			e.Time,
+			e.IP,
+			e.ClientID,
+			err,
+		)
+
+		// Go on and try to match anyway.
 	}

-	entry := logEntry{}
-	decodeLogEntry(&entry, line)
-
-	// Full check of the deserialized log entry
-	if !params.match(&entry) {
-		return nil, timestamp, nil
+	ts = e.Time.UnixNano()
+	if !params.match(e) {
+		return nil, ts, nil
 	}

-	return &entry, timestamp, nil
+	return e, ts, nil
 }
--- a/internal/querylog/search_test.go
+++ b/internal/querylog/search_test.go
@ -0,0 +1,95 @@
+package querylog
+
+import (
+	"net"
+	"testing"
+	"time"
+
+	"github.com/miekg/dns"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestQueryLog_Search_findClient(t *testing.T) {
+	const knownClientID = "client-1"
+	const knownClientName = "Known Client 1"
+	const unknownClientID = "client-2"
+
+	knownClient := &Client{
+		IDs:  []string{knownClientID},
+		Name: knownClientName,
+	}
+
+	findClientCalls := 0
+	findClient := func(ids []string) (c *Client, _ error) {
+		defer func() { findClientCalls++ }()
+
+		if len(ids) == 0 {
+			return nil, nil
+		}
+
+		if ids[0] == knownClientID {
+			return knownClient, nil
+		}
+
+		return nil, nil
+	}
+
+	l := newQueryLog(Config{
+		FindClient:        findClient,
+		BaseDir:           t.TempDir(),
+		RotationIvl:       1,
+		MemSize:           100,
+		Enabled:           true,
+		FileEnabled:       true,
+		AnonymizeClientIP: false,
+	})
+	t.Cleanup(l.Close)
+
+	q := &dns.Msg{
+		Question: []dns.Question{{
+			Name: "example.com",
+		}},
+	}
+
+	l.Add(AddParams{
+		Question: q,
+		ClientID: knownClientID,
+		ClientIP: net.IP{1, 2, 3, 4},
+	})
+
+	// Add the same thing again to test the cache.
+	l.Add(AddParams{
+		Question: q,
+		ClientID: knownClientID,
+		ClientIP: net.IP{1, 2, 3, 4},
+	})
+
+	l.Add(AddParams{
+		Question: q,
+		ClientID: unknownClientID,
+		ClientIP: net.IP{1, 2, 3, 5},
+	})
+
+	sp := &searchParams{
+		// Add some time to the "current" one to protect against
+		// low-resolution timers on some Windows machines.
+		//
+		// TODO(a.garipov): Use some kind of timeSource interface
+		// instead of relying on time.Now() in tests.
+		olderThan: time.Now().Add(10 * time.Second),
+		limit:     3,
+	}
+	entries, _ := l.search(sp)
+	assert.Equal(t, 2, findClientCalls)
+
+	require.Len(t, entries, 3)
+
+	assert.Nil(t, entries[0].client)
+
+	gotClient := entries[2].client
+	require.NotNil(t, gotClient)
+
+	assert.Equal(t, knownClientName, gotClient.Name)
+	assert.Equal(t, []string{knownClientID}, gotClient.IDs)
+}
--- a/internal/querylog/searchcriteria.go
+++ b/internal/querylog/searchcriteria.go
@ -48,40 +48,6 @@ type searchCriteria struct {
 	strict       bool         // should we strictly match (equality) or not (indexOf)
 }

-// quickMatch - quickly checks if the log entry matches this search criteria
-// the reason is to do it as quickly as possible without de-serializing the entry
-func (c *searchCriteria) quickMatch(line string) bool {
-	// note that we do this only for a limited set of criteria
-
-	switch c.criteriaType {
-	case ctDomainOrClient:
-		return c.quickMatchJSONValue(line, "QH") ||
-			c.quickMatchJSONValue(line, "IP") ||
-			c.quickMatchJSONValue(line, "CID")
-	default:
-		return true
-	}
-}
-
-// quickMatchJSONValue - helper used by quickMatch
-func (c *searchCriteria) quickMatchJSONValue(line, propertyName string) bool {
-	val := readJSONValue(line, propertyName)
-	if len(val) == 0 {
-		return false
-	}
-	val = strings.ToLower(val)
-	searchVal := strings.ToLower(c.value)
-
-	if c.strict && searchVal == val {
-		return true
-	}
-	if !c.strict && strings.Contains(val, searchVal) {
-		return true
-	}
-
-	return false
-}
-
 // match - checks if the log entry matches this search criteria
 func (c *searchCriteria) match(entry *logEntry) bool {
 	switch c.criteriaType {
@ -94,28 +60,41 @@ func (c *searchCriteria) match(entry *logEntry) bool {
 	return false
 }

-func (c *searchCriteria) ctDomainOrClientCase(entry *logEntry) bool {
-	clientID := strings.ToLower(entry.ClientID)
-	qhost := strings.ToLower(entry.QHost)
-	searchVal := strings.ToLower(c.value)
-	if c.strict && (qhost == searchVal || clientID == searchVal) {
-		return true
+func (c *searchCriteria) ctDomainOrClientCaseStrict(term, clientID, name, host, ip string) bool {
+	return strings.EqualFold(host, term) ||
+		strings.EqualFold(clientID, term) ||
+		strings.EqualFold(ip, term) ||
+		strings.EqualFold(name, term)
+}
+
+func (c *searchCriteria) ctDomainOrClientCase(e *logEntry) bool {
+	clientID := e.ClientID
+	host := e.QHost
+
+	var name string
+	if e.client != nil {
+		name = e.client.Name
 	}

-	if !c.strict && (strings.Contains(qhost, searchVal) || strings.Contains(clientID, searchVal)) {
-		return true
+	ip := e.IP.String()
+	term := strings.ToLower(c.value)
+	if c.strict {
+		return c.ctDomainOrClientCaseStrict(term, clientID, name, host, ip)
 	}

-	ipStr := entry.IP.String()
-	if c.strict && ipStr == c.value {
-		return true
-	}
+	// TODO(a.garipov): Write a case-insensitive version of strings.Contains
+	// instead of generating garbage.  Or, perhaps in the future, use
+	// a locale-appropriate matcher from golang.org/x/text.
+	clientID = strings.ToLower(clientID)
+	host = strings.ToLower(host)
+	ip = strings.ToLower(ip)
+	name = strings.ToLower(name)
+	term = strings.ToLower(term)

-	if !c.strict && strings.Contains(ipStr, c.value) {
-		return true
-	}
-
-	return false
+	return strings.Contains(clientID, term) ||
+		strings.Contains(host, term) ||
+		strings.Contains(ip, term) ||
+		strings.Contains(name, term)
 }

 func (c *searchCriteria) ctFilteringStatusCase(res dnsfilter.Result) bool {
--- a/internal/querylog/searchparams.go
+++ b/internal/querylog/searchparams.go
@ -27,19 +27,6 @@ func newSearchParams() *searchParams {
 	}
 }

-// quickMatchesGetDataParams - quickly checks if the line matches the searchParams
-// this method does not guarantee anything and the reason is to do a quick check
-// without deserializing anything
-func (s *searchParams) quickMatch(line string) bool {
-	for _, c := range s.searchCriteria {
-		if !c.quickMatch(line) {
-			return false
-		}
-	}
-
-	return true
-}
-
 // match - checks if the logEntry matches the searchParams
 func (s *searchParams) match(entry *logEntry) bool {
 	if !s.olderThan.IsZero() && entry.Time.UnixNano() >= s.olderThan.UnixNano() {
--- a/internal/tools/go.mod
+++ b/internal/tools/go.mod
@ -15,6 +15,6 @@ require (
 	golang.org/x/sys v0.0.0-20210309074719-68d13333faf2 // indirect
 	golang.org/x/tools v0.1.0
 	honnef.co/go/tools v0.1.3
-	mvdan.cc/gofumpt v0.1.0
+	mvdan.cc/gofumpt v0.1.1
 	mvdan.cc/unparam v0.0.0-20210104141923-aac4ce9116a7
 )
--- a/internal/tools/go.sum
+++ b/internal/tools/go.sum
@ -150,7 +150,6 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.4 h1:L8R9j+yAqZuZjsqh/z+F1NCffTKKLShY6zXTItVIZ8M=
 github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@ -265,7 +264,6 @@ github.com/mwitkow/go-proto-validators v0.2.0/go.mod h1:ZfA1hW+UH/2ZHOWvQ3HnQaU0
 github.com/nbutton23/zxcvbn-go v0.0.0-20210217022336-fa2cb2858354 h1:4kuARK6Y6FxaNu/BnU2OAaLF86eTVhP2hjTB6iMvItA=
 github.com/nbutton23/zxcvbn-go v0.0.0-20210217022336-fa2cb2858354/go.mod h1:KSVJerMDfblTH7p5MZaTt+8zaT2iEk3AkVb9PQdZuE8=
 github.com/nishanths/predeclared v0.0.0-20190419143655-18a43bb90ffc/go.mod h1:62PewwiQTlm/7Rj+cxVYqZvDIUc+JjZq6GHAC1fsObQ=
-github.com/nxadm/tail v1.4.4 h1:DQuhQpB1tVlglWS2hLQ5OV6B5r8aGxSrPc5Qo6uTN78=
 github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
 github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
 github.com/nxadm/tail v1.4.8/go.mod h1:+ncqLTQzXmGhMZNUePPaPqPvBxHAIsmXswZKocGu+AU=
@ -335,7 +333,6 @@ github.com/stretchr/testify v0.0.0-20170130113145-4d4bfba8f1d1/go.mod h1:a8OnRci
 github.com/stretchr/testify v1.1.4/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
@ -455,7 +452,6 @@ golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81R
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
-golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb h1:eBmm0M9fYhWpKZLjQUUKka/LtIxf46G4fxeEz5KJr9U=
 golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110 h1:qWPm9rbaAMKs8Bq/9LRpbMqxWRVUAQwMI9fVrssnTfw=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
@ -529,7 +525,6 @@ golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fq
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
-golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ=
 golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
@ -671,7 +666,6 @@ google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQ
 google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
@ -714,8 +708,8 @@ honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9
 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 honnef.co/go/tools v0.1.3 h1:qTakTkI6ni6LFD5sBwwsdSO+AQqbSIxOauHTTQKZ/7o=
 honnef.co/go/tools v0.1.3/go.mod h1:NgwopIslSNH47DimFoV78dnkksY2EFtX0ajyb3K/las=
-mvdan.cc/gofumpt v0.1.0 h1:hsVv+Y9UsZ/mFZTxJZuHVI6shSQCtzZ11h1JEFPAZLw=
-mvdan.cc/gofumpt v0.1.0/go.mod h1:yXG1r1WqZVKWbVRtBWKWX9+CxGYfA51nSomhM0woR48=
+mvdan.cc/gofumpt v0.1.1 h1:bi/1aS/5W00E2ny5q65w9SnKpWEF/UIOqDYBILpo9rA=
+mvdan.cc/gofumpt v0.1.1/go.mod h1:yXG1r1WqZVKWbVRtBWKWX9+CxGYfA51nSomhM0woR48=
 mvdan.cc/unparam v0.0.0-20210104141923-aac4ce9116a7 h1:HT3e4Krq+IE44tiN36RvVEb6tvqeIdtsVSsxmNPqlFU=
 mvdan.cc/unparam v0.0.0-20210104141923-aac4ce9116a7/go.mod h1:hBpJkZE8H/sb+VRFvw2+rBpHNsTBcvSpk61hr8mzXZE=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
--- a/internal/tools/tools.go
+++ b/internal/tools/tools.go
@ -13,6 +13,6 @@ import (
 	_ "golang.org/x/tools/go/analysis/passes/nilness/cmd/nilness"
 	_ "golang.org/x/tools/go/analysis/passes/shadow/cmd/shadow"
 	_ "honnef.co/go/tools/cmd/staticcheck"
-	_ "mvdan.cc/gofumpt/gofumports"
+	_ "mvdan.cc/gofumpt"
 	_ "mvdan.cc/unparam"
 )
--- a/openapi/CHANGELOG.md
+++ b/openapi/CHANGELOG.md
@ -2,6 +2,13 @@

 <!-- TODO(a.garipov): Reformat in accordance with the KeepAChangelog spec. -->

+## v0.106: API changes
+
+### New `"client_info"` field in `GET /querylog` response
+
+* The new optional field `"client_info"` of `QueryLogItem` objects contains
+  a more full information about the client.
+
 ## v0.105: API changes

 ### New `"client_id"` field in `GET /querylog` response
--- a/openapi/openapi.yaml
+++ b/openapi/openapi.yaml
@ -1815,6 +1815,8 @@
            The client ID, if provided in DOH, DOQ, or DOT.
          'example': 'cli123'
          'type': 'string'
+        'client_info':
+          '$ref': '#/components/schemas/QueryLogItemClient'
        'client_proto':
          'enum':
          - 'dot'
@ -1876,6 +1878,58 @@
          'type': 'string'
          'description': 'DNS request processing start time'
          'example': '2018-11-26T00:02:41+03:00'
+    'QueryLogItemClient':
+      'description': >
+        Client information for a query log item.
+      'properties':
+        'disallowed':
+          'type': 'boolean'
+          'description': >
+            Whether the client's IP is blocked or not.
+        'disallowed_rule':
+          'type': 'string'
+          'description': >
+            The rule due to which the client is disallowed.  If disallowed is
+            set to true, and this string is empty, then the client IP is
+            disallowed by the "allowed IP list", that is it is not included in
+            the allowed list.
+        'ids':
+          'description': >
+            IP, CIDR, MAC, or client ID.
+          'items':
+            'type': 'string'
+          'type': 'array'
+        'name':
+          'description': >
+            Persistent client's name or an empty string if this is a runtime
+            client.
+          'type': 'string'
+        'whois':
+          '$ref': '#/components/schemas/QueryLogItemClientWhois'
+      'required':
+      - 'disallowed'
+      - 'disallowed_rule'
+      - 'ids'
+      - 'name'
+      - 'whois'
+      'type': 'object'
+    'QueryLogItemClientWhois':
+      'description': >
+        Client WHOIS information, if any.
+      'properties':
+        'city':
+          'description': >
+            City, if any.
+          'type': 'string'
+        'country':
+          'description': >
+            Country, if any.
+          'type': 'string'
+        'orgname':
+          'description': >
+            Organization name, if any.
+          'type': 'string'
+      'type': 'object'
    'QueryLog':
      'type': 'object'
      'description': 'Query log'
@ -2205,7 +2259,7 @@
        'use_global_blocked_services': true
        'blocked_services': null
        'upstreams': null
-        'whois_info': null
+        'whois_info': {}
        'disallowed': false
        'disallowed_rule': ''
      - '1.2.3.4':
@ -2219,7 +2273,7 @@
        'use_global_blocked_services': true
        'blocked_services': null
        'upstreams': null
-        'whois_info': null
+        'whois_info': {}
        'disallowed': false
        'disallowed_rule': ''
    'AccessListResponse':