miracle091/dnscrypt-proxy
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Enhance logging (#834)

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* Enhance query logging

Add request duration, and forward duration if applicable.

* Also measure requests forwarded based on forwarding_rules
This commit is contained in:
Ferdinand Holzer 2019-05-26 21:16:47 +02:00 committed by Frank Denis
parent 29a954f651
commit eab77ff871
4 changed files with 29 additions and 9 deletions
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3
dnscrypt-proxy/plugin_forward.go
View File

@ -5,6 +5,7 @@ import (
"math/rand"
"net"
"strings"
"time"
"unicode"
"github.com/jedisct1/dlog"
@ -92,7 +93,9 @@ func (plugin *PluginForward) Eval(pluginsState *PluginsState, msg *dns.Msg) erro
return nil
}
server := servers[rand.Intn(len(servers))]
reqStart := time.Now()
respMsg, err := dns.Exchange(msg, server)
pluginsState.forwardDuration = time.Now().Sub(reqStart)
if err != nil {
return err
}

12
dnscrypt-proxy/plugin_query_log.go
View File

@ -71,16 +71,22 @@ func (plugin *PluginQueryLog) Eval(pluginsState *PluginsState, msg *dns.Msg) err
returnCode = string(returnCode)
}
var requestDuration, forwardDuration time.Duration
if !pluginsState.requestStart.IsZero() && !pluginsState.requestEnd.IsZero() {
requestDuration = pluginsState.requestEnd.Sub(pluginsState.requestStart)
}
forwardDuration = pluginsState.forwardDuration
var line string
if plugin.format == "tsv" {
now := time.Now()
year, month, day := now.Date()
hour, minute, second := now.Clock()
tsStr := fmt.Sprintf("[%d-%02d-%02d %02d:%02d:%02d]", year, int(month), day, hour, minute, second)
line = fmt.Sprintf("%s\t%s\t%s\t%s\t%s\n", tsStr, clientIPStr, StringQuote(qName), qType, returnCode)
line = fmt.Sprintf("%s\t%s\t%s\t%s\t%s\t%v\t%v\n", tsStr, clientIPStr, StringQuote(qName), qType, returnCode, requestDuration, forwardDuration)
} else if plugin.format == "ltsv" {
line = fmt.Sprintf("time:%d\thost:%s\tmessage:%s\ttype:%s\treturn:%s\n",
time.Now().Unix(), clientIPStr, StringQuote(qName), qType, returnCode)
line = fmt.Sprintf("time:%d\thost:%s\tmessage:%s\ttype:%s\treturn:%s\treqDuration:%d\tfwdDuration:%d\n",
time.Now().Unix(), clientIPStr, StringQuote(qName), qType, returnCode, requestDuration.Nanoseconds(), forwardDuration.Nanoseconds())
} else {
dlog.Fatalf("Unexpected log format: [%s]", plugin.format)
}

8
dnscrypt-proxy/plugins.go
View File

@ -4,6 +4,7 @@ import (
"errors"
"net"
"sync"
"time"
"github.com/jedisct1/dlog"
"github.com/miekg/dns"
@ -70,6 +71,9 @@ type PluginsState struct {
cacheMinTTL uint32
cacheMaxTTL uint32
questionMsg *dns.Msg
requestStart time.Time
requestEnd time.Time
forwardDuration time.Duration
returnCode PluginsReturnCode
}
@ -143,7 +147,7 @@ type Plugin interface {
Eval(pluginsState *PluginsState, msg *dns.Msg) error
}
func NewPluginsState(proxy *Proxy, clientProto string, clientAddr *net.Addr) PluginsState {
func NewPluginsState(proxy *Proxy, clientProto string, clientAddr *net.Addr, start time.Time) PluginsState {
return PluginsState{
action: PluginsActionForward,
maxPayloadSize: MaxDNSUDPPacketSize - ResponseOverhead,
@ -155,6 +159,7 @@ func NewPluginsState(proxy *Proxy, clientProto string, clientAddr *net.Addr) Plu
cacheMinTTL: proxy.cacheMinTTL,
cacheMaxTTL: proxy.cacheMaxTTL,
questionMsg: nil,
requestStart: start,
}
}
@ -253,6 +258,7 @@ func (pluginsState *PluginsState) ApplyLoggingPlugins(pluginsGlobals *PluginsGlo
if len(*pluginsGlobals.loggingPlugins) == 0 {
return nil
}
pluginsState.requestEnd = time.Now()
questionMsg := pluginsState.questionMsg
if questionMsg == nil || len(questionMsg.Question) > 1 {
return errors.New("Unexpected number of questions")

15
dnscrypt-proxy/proxy.go
View File

@ -206,12 +206,13 @@ func (proxy *Proxy) udpListener(clientPc *net.UDPConn) {
}
packet := buffer[:length]
go func() {
start := time.Now()
if !proxy.clientsCountInc() {
dlog.Warnf("Too many connections (max=%d)", proxy.maxClients)
return
}
defer proxy.clientsCountDec()
proxy.processIncomingQuery(proxy.serversInfo.getOne(), "udp", proxy.mainProto, packet, &clientAddr, clientPc)
proxy.processIncomingQuery(proxy.serversInfo.getOne(), "udp", proxy.mainProto, packet, &clientAddr, clientPc, start)
}()
}
}
@ -234,6 +235,7 @@ func (proxy *Proxy) tcpListener(acceptPc *net.TCPListener) {
continue
}
go func() {
start := time.Now()
defer clientPc.Close()
if !proxy.clientsCountInc() {
dlog.Warnf("Too many connections (max=%d)", proxy.maxClients)
@ -246,7 +248,7 @@ func (proxy *Proxy) tcpListener(acceptPc *net.TCPListener) {
return
}
clientAddr := clientPc.RemoteAddr()
proxy.processIncomingQuery(proxy.serversInfo.getOne(), "tcp", "tcp", packet, &clientAddr, clientPc)
proxy.processIncomingQuery(proxy.serversInfo.getOne(), "tcp", "tcp", packet, &clientAddr, clientPc, start)
}()
}
}
@ -325,11 +327,11 @@ func (proxy *Proxy) clientsCountDec() {
}
}
func (proxy *Proxy) processIncomingQuery(serverInfo *ServerInfo, clientProto string, serverProto string, query []byte, clientAddr *net.Addr, clientPc net.Conn) {
func (proxy *Proxy) processIncomingQuery(serverInfo *ServerInfo, clientProto string, serverProto string, query []byte, clientAddr *net.Addr, clientPc net.Conn, start time.Time) {
if len(query) < MinDNSPacketSize {
return
}
pluginsState := NewPluginsState(proxy, clientProto, clientAddr)
pluginsState := NewPluginsState(proxy, clientProto, clientAddr, start)
query, _ = pluginsState.ApplyQueryPlugins(&proxy.pluginsGlobals, query)
var response []byte
var err error
@ -360,11 +362,13 @@ func (proxy *Proxy) processIncomingQuery(serverInfo *ServerInfo, clientProto str
return
}
serverInfo.noticeBegin(proxy)
reqStart := time.Now()
if serverProto == "udp" {
response, err = proxy.exchangeWithUDPServer(serverInfo, sharedKey, encryptedQuery, clientNonce)
} else {
response, err = proxy.exchangeWithTCPServer(serverInfo, sharedKey, encryptedQuery, clientNonce)
}
pluginsState.forwardDuration = time.Now().Sub(reqStart)
if err != nil {
pluginsState.returnCode = PluginsReturnCodeServerError
pluginsState.ApplyLoggingPlugins(&proxy.pluginsGlobals)
@ -375,8 +379,9 @@ func (proxy *Proxy) processIncomingQuery(serverInfo *ServerInfo, clientProto str
tid := TransactionID(query)
SetTransactionID(query, 0)
serverInfo.noticeBegin(proxy)
resp, _, err := proxy.xTransport.DoHQuery(serverInfo.useGet, serverInfo.URL, query, proxy.timeout)
resp, duration, err := proxy.xTransport.DoHQuery(serverInfo.useGet, serverInfo.URL, query, proxy.timeout)
SetTransactionID(query, tid)
pluginsState.forwardDuration = duration
if err != nil {
pluginsState.returnCode = PluginsReturnCodeServerError
pluginsState.ApplyLoggingPlugins(&proxy.pluginsGlobals)