+ statistics: store in separate file

+ GET /control/stats handler
This commit is contained in:
Simon Zolin 2019-08-22 16:34:58 +03:00 committed by Ildar Kamalov
parent 60eb55bdce
commit 4a58266ba3
11 changed files with 1075 additions and 12 deletions

View file

@ -37,6 +37,11 @@ Contents:
* Services Filter
* API: Get blocked services list
* API: Set blocked services list
* Statistics
* API: Get statistics data
* API: Clear statistics data
* API: Set statistics parameters
* API: Get statistics parameters
## First startup
@ -863,3 +868,111 @@ Request:
Response:
200 OK
## Statistics
Load (main thread):
. Load data from the last bucket from DB for the current hour
Runtime (DNS worker threads):
. Update current unit
Runtime (goroutine):
. Periodically check that current unit should be flushed to file (when the current hour changes)
. If so, flush it, allocate a new empty unit
Runtime (HTTP worker threads):
. To respond to "Get statistics" API request we:
. load all units from file
. load current unit
. process data from all loaded units:
. sum up data for "total counters" output values
. add value into "per time unit counters" output arrays
. aggregate data for "top_" output arrays; sort in descending order
Unload (main thread):
. Flush current unit to file
### API: Get statistics data
Request:
GET /control/stats
Response:
200 OK
{
time_units: hours | days
// total counters:
num_dns_queries: 123
num_blocked_filtering: 123
num_replaced_safebrowsing: 123
num_replaced_safesearch: 123
num_replaced_parental: 123
avg_processing_time: 123.123
// per time unit counters
dns_queries: [123, ...]
blocked_filtering: [123, ...]
replaced_parental: [123, ...]
replaced_safebrowsing: [123, ...]
top_queried_domains: [
{host: 123},
...
]
top_blocked_domains: [
{host: 123},
...
]
top_clients: [
{IP: 123},
...
]
}
### API: Clear statistics data
Request:
POST /control/stats_reset
Response:
200 OK
### API: Set statistics parameters
Request:
POST /control/stats_config
{
"interval": 1 | 7 | 30 | 90
}
Response:
200 OK
### API: Get statistics parameters
Request:
GET /control/stats_info
Response:
200 OK
{
"interval": 1 | 7 | 30 | 90
}

View file

@ -11,6 +11,7 @@ import (
"time"
"github.com/AdguardTeam/AdGuardHome/dnsfilter"
"github.com/AdguardTeam/AdGuardHome/stats"
"github.com/AdguardTeam/dnsproxy/proxy"
"github.com/AdguardTeam/dnsproxy/upstream"
"github.com/AdguardTeam/golibs/log"
@ -40,6 +41,7 @@ type Server struct {
dnsProxy *proxy.Proxy // DNS proxy instance
dnsFilter *dnsfilter.Dnsfilter // DNS filter instance
queryLog *queryLog // Query log instance
stats stats.Stats
AllowedClients map[string]bool // IP addresses of whitelist clients
DisallowedClients map[string]bool // IP addresses of clients that should be blocked
@ -54,10 +56,11 @@ type Server struct {
// NewServer creates a new instance of the dnsforward.Server
// baseDir is the base directory for query logs
// Note: this function must be called only once
func NewServer(baseDir string) *Server {
func NewServer(baseDir string, stats stats.Stats) *Server {
s := &Server{
queryLog: newQueryLog(baseDir),
}
s.stats = stats
log.Printf("Start DNS server periodic jobs")
go s.queryLog.periodicQueryLogRotate()
@ -465,8 +468,8 @@ func (s *Server) handleDNSRequest(p *proxy.Proxy, d *proxy.DNSContext) error {
shouldLog = false
}
if s.conf.QueryLogEnabled && shouldLog {
elapsed := time.Since(start)
if s.conf.QueryLogEnabled && shouldLog {
upstreamAddr := ""
if d.Upstream != nil {
upstreamAddr = d.Upstream.Address()
@ -474,9 +477,52 @@ func (s *Server) handleDNSRequest(p *proxy.Proxy, d *proxy.DNSContext) error {
_ = s.queryLog.logRequest(msg, d.Res, res, elapsed, d.Addr, upstreamAddr)
}
s.updateStats(d, elapsed, *res)
return nil
}
func (s *Server) updateStats(d *proxy.DNSContext, elapsed time.Duration, res dnsfilter.Result) {
if s.stats == nil {
return
}
e := stats.Entry{}
e.Domain = strings.ToLower(d.Req.Question[0].Name)
e.Domain = e.Domain[:len(e.Domain)-1] // remove last "."
switch addr := d.Addr.(type) {
case *net.UDPAddr:
e.Client = addr.IP
case *net.TCPAddr:
e.Client = addr.IP
}
e.Time = uint(elapsed / 1000)
switch res.Reason {
case dnsfilter.NotFilteredNotFound:
fallthrough
case dnsfilter.NotFilteredWhiteList:
fallthrough
case dnsfilter.NotFilteredError:
e.Result = stats.RNotFiltered
case dnsfilter.FilteredSafeBrowsing:
e.Result = stats.RSafeBrowsing
case dnsfilter.FilteredParental:
e.Result = stats.RParental
case dnsfilter.FilteredSafeSearch:
e.Result = stats.RSafeSearch
case dnsfilter.FilteredBlackList:
fallthrough
case dnsfilter.FilteredInvalid:
fallthrough
case dnsfilter.FilteredBlockedService:
e.Result = stats.RFiltered
}
s.stats.Update(e)
}
// filterDNSRequest applies the dnsFilter and sets d.Res if the request was filtered
func (s *Server) filterDNSRequest(d *proxy.DNSContext) (*dnsfilter.Result, error) {
var res dnsfilter.Result

View file

@ -422,7 +422,7 @@ func TestBlockedBySafeBrowsing(t *testing.T) {
}
func createTestServer(t *testing.T) *Server {
s := NewServer(createDataDir(t))
s := NewServer(createDataDir(t), nil)
s.conf.UDPListenAddr = &net.UDPAddr{Port: 0}
s.conf.TCPListenAddr = &net.TCPAddr{Port: 0}

4
go.mod
View file

@ -7,7 +7,9 @@ require (
github.com/AdguardTeam/golibs v0.2.1
github.com/AdguardTeam/urlfilter v0.5.0
github.com/NYTimes/gziphandler v1.1.1
github.com/asaskevich/govalidator v0.0.0-20180720115003-f9ffefc3facf
github.com/bluele/gcache v0.0.0-20190518031135-bc40bd653833
github.com/etcd-io/bbolt v1.3.3
github.com/go-test/deep v1.0.1
github.com/gobuffalo/packr v1.19.0
github.com/joomcode/errorx v0.8.0
@ -17,8 +19,8 @@ require (
github.com/miekg/dns v1.1.8
github.com/sparrc/go-ping v0.0.0-20181106165434-ef3ab45e41b0
github.com/stretchr/testify v1.4.0
go.etcd.io/bbolt v1.3.3 // indirect
golang.org/x/net v0.0.0-20190620200207-3b0461eec859
golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0
gopkg.in/asaskevich/govalidator.v4 v4.0.0-20160518190739-766470278477
gopkg.in/yaml.v2 v2.2.2
)

4
go.sum
View file

@ -28,6 +28,7 @@ github.com/bluele/gcache v0.0.0-20190518031135-bc40bd653833/go.mod h1:8c4/i2Vlov
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/etcd-io/bbolt v1.3.3/go.mod h1:ZF2nL25h33cCyBtcyWeZ2/I3HQOfTP+0PIEvHjkjCrw=
github.com/go-ole/go-ole v1.2.4 h1:nNBDSCOigTSiarFpYE9J/KtEA1IOW4CNeqT9TQDqCxI=
github.com/go-ole/go-ole v1.2.4/go.mod h1:XCwSNxSkXRo4vlyPy93sltvi/qJq0jqQhjqQNIwKuxM=
github.com/go-test/deep v1.0.1 h1:UQhStjbkDClarlmv0am7OXXO4/GaPdCGiUiMTvi28sg=
@ -80,6 +81,7 @@ github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0
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=
go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9 h1:mKdxBk7AujPs8kU4m80U72y/zjbZ3UcXC7dClwKbUI0=
golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
@ -112,8 +114,6 @@ golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
gopkg.in/asaskevich/govalidator.v4 v4.0.0-20160518190739-766470278477 h1:5xUJw+lg4zao9W4HIDzlFbMYgSgtvNVHh00MEHvbGpQ=
gopkg.in/asaskevich/govalidator.v4 v4.0.0-20160518190739-766470278477/go.mod h1:QDV1vrFSrowdoOba0UM8VJPUZONT7dnfdLsM+GG53Z8=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

View file

@ -12,6 +12,7 @@ import (
"github.com/AdguardTeam/AdGuardHome/dhcpd"
"github.com/AdguardTeam/AdGuardHome/dnsfilter"
"github.com/AdguardTeam/AdGuardHome/dnsforward"
"github.com/AdguardTeam/AdGuardHome/stats"
"github.com/AdguardTeam/golibs/file"
"github.com/AdguardTeam/golibs/log"
yaml "gopkg.in/yaml.v2"
@ -68,6 +69,7 @@ type configuration struct {
controlLock sync.Mutex
transport *http.Transport
client *http.Client
stats stats.Stats
// cached version.json to avoid hammering github.io for each page reload
versionCheckJSON []byte

View file

@ -4,6 +4,7 @@ import (
"encoding/json"
"net/http"
"github.com/AdguardTeam/AdGuardHome/stats"
"github.com/AdguardTeam/golibs/log"
)
@ -11,9 +12,8 @@ type statsConfig struct {
Interval uint `json:"interval"`
}
// Get stats configuration
func handleStatsInfo(w http.ResponseWriter, r *http.Request) {
log.Tracef("%s %v", r.Method, r.URL)
resp := statsConfig{}
resp.Interval = config.DNS.StatsInterval
@ -29,9 +29,8 @@ func handleStatsInfo(w http.ResponseWriter, r *http.Request) {
}
}
// Set stats configuration
func handleStatsConfig(w http.ResponseWriter, r *http.Request) {
log.Tracef("%s %v", r.Method, r.URL)
reqData := statsConfig{}
err := json.NewDecoder(r.Body).Decode(&reqData)
if err != nil {
@ -45,8 +44,47 @@ func handleStatsConfig(w http.ResponseWriter, r *http.Request) {
}
config.DNS.StatsInterval = reqData.Interval
config.stats.Configure(int(config.DNS.StatsInterval))
httpUpdateConfigReloadDNSReturnOK(w, r)
returnOK(w)
}
// handleStats returns aggregated stats data
func handleStats(w http.ResponseWriter, r *http.Request) {
units := stats.Hours
if config.DNS.StatsInterval > 7 {
units = stats.Days
}
counter := log.StartTimer()
d := config.stats.GetData(units)
counter.LogElapsed("Stats: prepared data")
if d == nil {
httpError(w, http.StatusInternalServerError, "Couldn't get statistics data")
return
}
data, err := json.Marshal(d)
if err != nil {
httpError(w, http.StatusInternalServerError, "json encode: %s", err)
return
}
w.Write(data)
}
// handleStatsReset resets the stats
func handleStatsReset(w http.ResponseWriter, r *http.Request) {
config.stats.Clear()
returnOK(w)
}
// RegisterStatsHandlers - register handlers
func RegisterStatsHandlers() {
httpRegister(http.MethodGet, "/control/stats", handleStats)
httpRegister(http.MethodPost, "/control/stats_reset", handleStatsReset)
httpRegister(http.MethodPost, "/control/stats_config", handleStatsConfig)
httpRegister(http.MethodGet, "/control/stats_info", handleStatsInfo)
}
func checkStatsInterval(i uint) bool {

View file

@ -8,6 +8,7 @@ import (
"github.com/AdguardTeam/AdGuardHome/dnsfilter"
"github.com/AdguardTeam/AdGuardHome/dnsforward"
"github.com/AdguardTeam/AdGuardHome/stats"
"github.com/AdguardTeam/dnsproxy/proxy"
"github.com/AdguardTeam/dnsproxy/upstream"
"github.com/AdguardTeam/golibs/log"
@ -33,7 +34,11 @@ func initDNSServer(baseDir string) {
log.Fatalf("Cannot create DNS data dir at %s: %s", baseDir, err)
}
config.dnsServer = dnsforward.NewServer(baseDir)
config.stats = stats.New("./data/stats.db", int(config.DNS.StatsInterval), nil)
if config.stats == nil {
log.Fatal("config.stats == nil")
}
config.dnsServer = dnsforward.NewServer(baseDir, config.stats)
initRDNS()
}
@ -178,5 +183,7 @@ func stopDNSServer() error {
return errorx.Decorate(err, "Couldn't stop forwarding DNS server")
}
config.stats.Close()
return nil
}

68
stats/stats.go Normal file
View file

@ -0,0 +1,68 @@
// Module for managing statistics for DNS filtering server
package stats
import (
"net"
)
type unitIDCallback func() int
// New - create object
// filename: DB file name
// limit: time limit (in days)
// unitID: user function to get the current unit ID. If nil, the current time hour is used.
func New(filename string, limit int, unitID unitIDCallback) Stats {
return createObject(filename, limit, unitID)
}
// Stats - main interface
type Stats interface {
// Close object.
// This function is not thread safe
// (can't be called in parallel with any other function of this interface).
Close()
// Set new configuration at runtime.
// limit: time limit (in days)
Configure(limit int)
// Reset counters and clear database
Clear()
// Update counters
Update(e Entry)
// Get data
GetData(timeUnit TimeUnit) map[string]interface{}
}
// TimeUnit - time unit
type TimeUnit int
// Supported time units
const (
Hours TimeUnit = iota
Days
)
// Result of DNS request processing
type Result int
// Supported result values
const (
RNotFiltered Result = iota + 1
RFiltered
RSafeBrowsing
RSafeSearch
RParental
rLast
)
// Entry - data to add
type Entry struct {
Domain string
Client net.IP
Result Result
Time uint // processing time (msec)
}

115
stats/stats_test.go Normal file
View file

@ -0,0 +1,115 @@
package stats
import (
"fmt"
"net"
"os"
"sync/atomic"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
func UIntArrayEquals(a []uint, b []uint) bool {
if len(a) != len(b) {
return false
}
for i := range a {
if a[i] != b[i] {
return false
}
}
return true
}
func TestStats(t *testing.T) {
s := New("./stats.db", 1, nil)
e := Entry{}
e.Domain = "domain"
e.Client = net.ParseIP("127.0.0.1")
e.Result = RFiltered
e.Time = 123456
s.Update(e)
e.Domain = "domain"
e.Client = net.ParseIP("127.0.0.1")
e.Result = RNotFiltered
e.Time = 123456
s.Update(e)
d := s.GetData(Hours)
a := []uint{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2}
assert.True(t, UIntArrayEquals(d["dns_queries"].([]uint), a))
a = []uint{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}
assert.True(t, UIntArrayEquals(d["blocked_filtering"].([]uint), a))
a = []uint{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
assert.True(t, UIntArrayEquals(d["replaced_safebrowsing"].([]uint), a))
a = []uint{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
assert.True(t, UIntArrayEquals(d["replaced_parental"].([]uint), a))
m := d["top_queried_domains"].([]map[string]uint)
assert.True(t, m[0]["domain"] == 1)
m = d["top_blocked_domains"].([]map[string]uint)
assert.True(t, m[0]["domain"] == 1)
m = d["top_clients"].([]map[string]uint)
assert.True(t, m[0]["127.0.0.1"] == 2)
assert.True(t, d["num_dns_queries"].(uint) == 2)
assert.True(t, d["num_blocked_filtering"].(uint) == 1)
assert.True(t, d["num_replaced_safebrowsing"].(uint) == 0)
assert.True(t, d["num_replaced_safesearch"].(uint) == 0)
assert.True(t, d["num_replaced_parental"].(uint) == 0)
assert.True(t, d["avg_processing_time"].(float64) == 0.123456)
s.Clear()
s.Close()
os.Remove("./stats.db")
}
func TestLargeNumbers(t *testing.T) {
var hour int32
hour = 1
newID := func() int {
// use "atomic" to make Go race detector happy
return int(atomic.LoadInt32(&hour))
}
// log.SetLevel(log.DEBUG)
fn := "./stats.db"
os.Remove(fn)
s := New(fn, 1, newID)
e := Entry{}
n := 1000 // number of distinct clients and domains every hour
for h := 0; h != 12; h++ {
if h != 0 {
atomic.AddInt32(&hour, 1)
time.Sleep(1500 * time.Millisecond)
}
for i := 0; i != n; i++ {
e.Domain = fmt.Sprintf("domain%d", i)
e.Client = net.ParseIP("127.0.0.1")
e.Client[2] = byte((i & 0xff00) >> 8)
e.Client[3] = byte(i & 0xff)
e.Result = RNotFiltered
e.Time = 123456
s.Update(e)
}
}
d := s.GetData(Hours)
assert.True(t, d["num_dns_queries"].(uint) == uint(int(hour)*n))
s.Close()
os.Remove(fn)
}

672
stats/stats_unit.go Normal file
View file

@ -0,0 +1,672 @@
package stats
import (
"bytes"
"encoding/binary"
"encoding/gob"
"fmt"
"os"
"sort"
"sync"
"time"
"github.com/AdguardTeam/golibs/log"
bolt "github.com/etcd-io/bbolt"
)
const (
maxDomains = 100 // max number of top domains to store in file or return via Get()
maxClients = 100 // max number of top clients to store in file or return via Get()
)
// statsCtx - global context
type statsCtx struct {
limit int // maximum time we need to keep data for (in hours)
filename string // database file name
unitID unitIDCallback // user function which returns the current unit ID
db *bolt.DB
unit *unit // the current unit
unitLock sync.Mutex // protect 'unit'
}
// data for 1 time unit
type unit struct {
id int // unit ID. Default: absolute hour since Jan 1, 1970
nTotal int // total requests
nResult []int // number of requests per one result
timeSum int // sum of processing time of all requests (usec)
// top:
domains map[string]int // number of requests per domain
blockedDomains map[string]int // number of blocked requests per domain
clients map[string]int // number of requests per client
}
// name-count pair
type countPair struct {
Name string
Count uint
}
// structure for storing data in file
type unitDB struct {
NTotal uint
NResult []uint
Domains []countPair
BlockedDomains []countPair
Clients []countPair
TimeAvg uint // usec
}
func createObject(filename string, limitDays int, unitID unitIDCallback) *statsCtx {
s := statsCtx{}
s.limit = limitDays * 24
s.filename = filename
s.unitID = newUnitID
if unitID != nil {
s.unitID = unitID
}
if !s.dbOpen() {
return nil
}
id := s.unitID()
tx := s.beginTxn(true)
var udb *unitDB
if tx != nil {
log.Tracef("Deleting old units...")
firstID := id - s.limit - 1
unitDel := 0
forEachBkt := func(name []byte, b *bolt.Bucket) error {
id := btoi(name)
if id < firstID {
err := tx.DeleteBucket(name)
if err != nil {
log.Debug("tx.DeleteBucket: %s", err)
}
log.Debug("Stats: deleted unit %d", id)
unitDel++
return nil
}
return fmt.Errorf("")
}
_ = tx.ForEach(forEachBkt)
udb = s.loadUnitFromDB(tx, id)
if unitDel != 0 {
s.commitTxn(tx)
} else {
_ = tx.Rollback()
}
}
u := unit{}
s.initUnit(&u, id)
if udb != nil {
deserialize(&u, udb)
}
s.unit = &u
go s.periodicFlush()
log.Debug("Stats: initialized")
return &s
}
func (s *statsCtx) dbOpen() bool {
var err error
log.Tracef("db.Open...")
s.db, err = bolt.Open(s.filename, 0644, nil)
if err != nil {
log.Error("Stats: open DB: %s: %s", s.filename, err)
return false
}
log.Tracef("db.Open")
return true
}
// Atomically swap the currently active unit with a new value
// Return old value
func (s *statsCtx) swapUnit(new *unit) *unit {
s.unitLock.Lock()
u := s.unit
s.unit = new
s.unitLock.Unlock()
return u
}
// Get unit ID for the current hour
func newUnitID() int {
return int(time.Now().Unix() / (60 * 60))
}
// Initialize a unit
func (s *statsCtx) initUnit(u *unit, id int) {
u.id = id
u.nResult = make([]int, rLast)
u.domains = make(map[string]int)
u.blockedDomains = make(map[string]int)
u.clients = make(map[string]int)
}
// Open a DB transaction
func (s *statsCtx) beginTxn(wr bool) *bolt.Tx {
db := s.db
if db == nil {
return nil
}
log.Tracef("db.Begin...")
tx, err := db.Begin(wr)
if err != nil {
log.Error("db.Begin: %s", err)
return nil
}
log.Tracef("db.Begin")
return tx
}
func (s *statsCtx) commitTxn(tx *bolt.Tx) {
err := tx.Commit()
if err != nil {
log.Debug("tx.Commit: %s", err)
return
}
log.Tracef("tx.Commit")
}
// Get unit name
func unitName(id int) []byte {
return itob(id)
}
// Convert integer to 8-byte array (big endian)
func itob(v int) []byte {
b := make([]byte, 8)
binary.BigEndian.PutUint64(b, uint64(v))
return b
}
// Convert 8-byte array (big endian) to integer
func btoi(b []byte) int {
return int(binary.BigEndian.Uint64(b))
}
// Flush the current unit to DB and delete an old unit when a new hour is started
func (s *statsCtx) periodicFlush() {
for {
s.unitLock.Lock()
ptr := s.unit
s.unitLock.Unlock()
if ptr == nil {
break
}
id := s.unitID()
if ptr.id == id {
time.Sleep(time.Second)
continue
}
nu := unit{}
s.initUnit(&nu, id)
u := s.swapUnit(&nu)
udb := serialize(u)
tx := s.beginTxn(true)
if tx == nil {
continue
}
ok1 := s.flushUnitToDB(tx, u.id, udb)
ok2 := s.deleteUnit(tx, id-s.limit)
if ok1 || ok2 {
s.commitTxn(tx)
} else {
_ = tx.Rollback()
}
}
log.Tracef("periodicFlush() exited")
}
// Delete unit's data from file
func (s *statsCtx) deleteUnit(tx *bolt.Tx, id int) bool {
err := tx.DeleteBucket(unitName(id))
if err != nil {
log.Tracef("bolt DeleteBucket: %s", err)
return false
}
log.Debug("Stats: deleted unit %d", id)
return true
}
func convertMapToArray(m map[string]int, max int) []countPair {
a := []countPair{}
for k, v := range m {
pair := countPair{}
pair.Name = k
pair.Count = uint(v)
a = append(a, pair)
}
less := func(i, j int) bool {
if a[i].Count >= a[j].Count {
return true
}
return false
}
sort.Slice(a, less)
if max > len(a) {
max = len(a)
}
return a[:max]
}
func convertArrayToMap(a []countPair) map[string]int {
m := map[string]int{}
for _, it := range a {
m[it.Name] = int(it.Count)
}
return m
}
func serialize(u *unit) *unitDB {
udb := unitDB{}
udb.NTotal = uint(u.nTotal)
for _, it := range u.nResult {
udb.NResult = append(udb.NResult, uint(it))
}
if u.nTotal != 0 {
udb.TimeAvg = uint(u.timeSum / u.nTotal)
}
udb.Domains = convertMapToArray(u.domains, maxDomains)
udb.BlockedDomains = convertMapToArray(u.blockedDomains, maxDomains)
udb.Clients = convertMapToArray(u.clients, maxClients)
return &udb
}
func deserialize(u *unit, udb *unitDB) {
u.nTotal = int(udb.NTotal)
for _, it := range udb.NResult {
u.nResult = append(u.nResult, int(it))
}
u.domains = convertArrayToMap(udb.Domains)
u.blockedDomains = convertArrayToMap(udb.BlockedDomains)
u.clients = convertArrayToMap(udb.Clients)
u.timeSum = int(udb.TimeAvg) * u.nTotal
}
func (s *statsCtx) flushUnitToDB(tx *bolt.Tx, id int, udb *unitDB) bool {
log.Tracef("Flushing unit %d", id)
bkt, err := tx.CreateBucketIfNotExists(unitName(id))
if err != nil {
log.Error("tx.CreateBucketIfNotExists: %s", err)
return false
}
var buf bytes.Buffer
enc := gob.NewEncoder(&buf)
err = enc.Encode(udb)
if err != nil {
log.Error("gob.Encode: %s", err)
return false
}
err = bkt.Put([]byte{0}, buf.Bytes())
if err != nil {
log.Error("bkt.Put: %s", err)
return false
}
return true
}
func (s *statsCtx) loadUnitFromDB(tx *bolt.Tx, id int) *unitDB {
bkt := tx.Bucket(unitName(id))
if bkt == nil {
return nil
}
log.Tracef("Loading unit %d", id)
var buf bytes.Buffer
buf.Write(bkt.Get([]byte{0}))
dec := gob.NewDecoder(&buf)
udb := unitDB{}
err := dec.Decode(&udb)
if err != nil {
log.Error("gob Decode: %s", err)
return nil
}
return &udb
}
func convertTopArray(a []countPair) []map[string]uint {
m := []map[string]uint{}
for _, it := range a {
ent := map[string]uint{}
ent[it.Name] = it.Count
m = append(m, ent)
}
return m
}
func (s *statsCtx) Configure(limit int) {
if limit < 0 {
return
}
s.limit = limit * 24
log.Debug("Stats: set limit: %d", limit)
}
func (s *statsCtx) Close() {
u := s.swapUnit(nil)
udb := serialize(u)
tx := s.beginTxn(true)
if tx != nil {
if s.flushUnitToDB(tx, u.id, udb) {
s.commitTxn(tx)
} else {
_ = tx.Rollback()
}
}
if s.db != nil {
log.Tracef("db.Close...")
_ = s.db.Close()
log.Tracef("db.Close")
}
log.Debug("Stats: closed")
}
func (s *statsCtx) Clear() {
tx := s.beginTxn(true)
if tx != nil {
db := s.db
s.db = nil
_ = tx.Rollback()
// the active transactions can continue using database,
// but no new transactions will be opened
_ = db.Close()
log.Tracef("db.Close")
// all active transactions are now closed
}
u := unit{}
s.initUnit(&u, s.unitID())
_ = s.swapUnit(&u)
err := os.Remove(s.filename)
if err != nil {
log.Error("os.Remove: %s", err)
}
_ = s.dbOpen()
log.Debug("Stats: cleared")
}
func (s *statsCtx) Update(e Entry) {
if e.Result == 0 ||
len(e.Domain) == 0 ||
!(len(e.Client) == 4 || len(e.Client) == 16) {
return
}
client := e.Client.String()
s.unitLock.Lock()
u := s.unit
u.nResult[e.Result]++
if e.Result == RNotFiltered {
u.domains[e.Domain]++
} else {
u.blockedDomains[e.Domain]++
}
u.clients[client]++
u.timeSum += int(e.Time)
u.nTotal++
s.unitLock.Unlock()
}
/* Algorithm:
. Prepare array of N units, where N is the value of "limit" configuration setting
. Load data for the most recent units from file
If a unit with required ID doesn't exist, just add an empty unit
. Get data for the current unit
. Process data from the units and prepare an output map object:
* per time unit counters:
* DNS-queries/time-unit
* blocked/time-unit
* safebrowsing-blocked/time-unit
* parental-blocked/time-unit
If time-unit is an hour, just add values from each unit to an array.
If time-unit is a day, aggregate per-hour data into days.
* top counters:
* queries/domain
* queries/blocked-domain
* queries/client
To get these values we first sum up data for all units into a single map.
Then we get the pairs with the highest numbers (the values are sorted in descending order)
* total counters:
* DNS-queries
* blocked
* safebrowsing-blocked
* safesearch-blocked
* parental-blocked
These values are just the sum of data for all units.
*/
// nolint (gocyclo)
func (s *statsCtx) GetData(timeUnit TimeUnit) map[string]interface{} {
d := map[string]interface{}{}
tx := s.beginTxn(false)
if tx == nil {
return nil
}
units := []*unitDB{} //per-hour units
lastID := s.unitID()
firstID := lastID - s.limit + 1
for i := firstID; i != lastID; i++ {
u := s.loadUnitFromDB(tx, i)
if u == nil {
u = &unitDB{}
u.NResult = make([]uint, rLast)
}
units = append(units, u)
}
_ = tx.Rollback()
s.unitLock.Lock()
cu := serialize(s.unit)
cuID := s.unit.id
s.unitLock.Unlock()
if cuID != lastID {
units = units[1:]
}
units = append(units, cu)
if len(units) != s.limit {
log.Fatalf("len(units) != s.limit: %d %d", len(units), s.limit)
}
// per time unit counters:
// 720 hours may span 31 days, so we skip data for the first day in this case
firstDayID := (firstID + 24 - 1) / 24 * 24 // align_ceil(24)
a := []uint{}
if timeUnit == Hours {
for _, u := range units {
a = append(a, u.NTotal)
}
} else {
var sum uint
id := firstDayID
nextDayID := firstDayID + 24
for i := firstDayID - firstID; i != len(units); i++ {
sum += units[i].NTotal
if id == nextDayID {
a = append(a, sum)
sum = 0
nextDayID += 24
}
id++
}
if id < nextDayID {
a = append(a, sum)
}
if len(a) != s.limit/24 {
log.Fatalf("len(a) != s.limit: %d %d", len(a), s.limit)
}
}
d["dns_queries"] = a
a = []uint{}
if timeUnit == Hours {
for _, u := range units {
a = append(a, u.NResult[RFiltered])
}
} else {
var sum uint
id := firstDayID
nextDayID := firstDayID + 24
for i := firstDayID - firstID; i != len(units); i++ {
sum += units[i].NResult[RFiltered]
if id == nextDayID {
a = append(a, sum)
sum = 0
nextDayID += 24
}
id++
}
if id < nextDayID {
a = append(a, sum)
}
}
d["blocked_filtering"] = a
a = []uint{}
if timeUnit == Hours {
for _, u := range units {
a = append(a, u.NResult[RSafeBrowsing])
}
} else {
var sum uint
id := firstDayID
nextDayID := firstDayID + 24
for i := firstDayID - firstID; i != len(units); i++ {
sum += units[i].NResult[RSafeBrowsing]
if id == nextDayID {
a = append(a, sum)
sum = 0
nextDayID += 24
}
id++
}
if id < nextDayID {
a = append(a, sum)
}
}
d["replaced_safebrowsing"] = a
a = []uint{}
if timeUnit == Hours {
for _, u := range units {
a = append(a, u.NResult[RParental])
}
} else {
var sum uint
id := firstDayID
nextDayID := firstDayID + 24
for i := firstDayID - firstID; i != len(units); i++ {
sum += units[i].NResult[RParental]
if id == nextDayID {
a = append(a, sum)
sum = 0
nextDayID += 24
}
id++
}
if id < nextDayID {
a = append(a, sum)
}
}
d["replaced_parental"] = a
// top counters:
m := map[string]int{}
for _, u := range units {
for _, it := range u.Domains {
m[it.Name] += int(it.Count)
}
}
a2 := convertMapToArray(m, maxDomains)
d["top_queried_domains"] = convertTopArray(a2)
m = map[string]int{}
for _, u := range units {
for _, it := range u.BlockedDomains {
m[it.Name] += int(it.Count)
}
}
a2 = convertMapToArray(m, maxDomains)
d["top_blocked_domains"] = convertTopArray(a2)
m = map[string]int{}
for _, u := range units {
for _, it := range u.Clients {
m[it.Name] += int(it.Count)
}
}
a2 = convertMapToArray(m, maxClients)
d["top_clients"] = convertTopArray(a2)
// total counters:
sum := unitDB{}
timeN := 0
sum.NResult = make([]uint, rLast)
for _, u := range units {
sum.NTotal += u.NTotal
sum.TimeAvg += u.TimeAvg
if u.TimeAvg != 0 {
timeN++
}
sum.NResult[RFiltered] += u.NResult[RFiltered]
sum.NResult[RSafeBrowsing] += u.NResult[RSafeBrowsing]
sum.NResult[RSafeSearch] += u.NResult[RSafeSearch]
sum.NResult[RParental] += u.NResult[RParental]
}
d["num_dns_queries"] = sum.NTotal
d["num_blocked_filtering"] = sum.NResult[RFiltered]
d["num_replaced_safebrowsing"] = sum.NResult[RSafeBrowsing]
d["num_replaced_safesearch"] = sum.NResult[RSafeSearch]
d["num_replaced_parental"] = sum.NResult[RParental]
avgTime := float64(0)
if timeN != 0 {
avgTime = float64(sum.TimeAvg/uint(timeN)) / 1000000
}
d["avg_processing_time"] = avgTime
d["time_units"] = "hours"
if timeUnit == Days {
d["time_units"] = "days"
}
return d
}