Add timeattack detector

mtglib/init.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"net"
 	"net/http"
+	"time"
 )
 
 var (
@@ -46,6 +47,10 @@ type EventStream interface {
 	Shutdown()
 }
 
+type TimeAttackDetector interface {
+	Valid(time.Time) error
+}
+
 type Logger interface {
 	Named(name string) Logger
 

mtglib/proxy.go

@@ -17,12 +17,13 @@ type Proxy struct {
 	streamWaitGroup sync.WaitGroup
 	workerPool      *ants.PoolWithFunc
 
-	secret          Secret
-	network         Network
-	antiReplayCache AntiReplayCache
-	ipBlocklist     IPBlocklist
-	eventStream     EventStream
-	logger          Logger
+	secret             Secret
+	network            Network
+	timeAttackDetector TimeAttackDetector
+	antiReplayCache    AntiReplayCache
+	ipBlocklist        IPBlocklist
+	eventStream        EventStream
+	logger             Logger
 }
 
 func (p *Proxy) ServeConn(conn net.Conn) {

mtglib/proxy_opts.go

@@ -3,12 +3,13 @@ package mtglib
 import "time"
 
 type ProxyOpts struct {
-	Secret          Secret
-	Network         Network
-	AntiReplayCache AntiReplayCache
-	IPBlocklist     IPBlocklist
-	EventStream     EventStream
-	Logger          Logger
+	Secret             Secret
+	Network            Network
+	AntiReplayCache    AntiReplayCache
+	TimeAttackDetector TimeAttackDetector
+	IPBlocklist        IPBlocklist
+	EventStream        EventStream
+	Logger             Logger
 
 	BufferSize  uint
 	Concurrency uint