lib/connections: Add QUIC protocol support (fixes #5377) (#5737)

lib/model/folder_sendrecv.go

@@ -9,7 +9,6 @@ package model
 import (
 	"bytes"
 	"fmt"
-	"math/rand"
 	"path/filepath"
 	"runtime"
 	"sort"
@@ -25,6 +24,7 @@ import (
 	"github.com/syncthing/syncthing/lib/ignore"
 	"github.com/syncthing/syncthing/lib/osutil"
 	"github.com/syncthing/syncthing/lib/protocol"
+	"github.com/syncthing/syncthing/lib/rand"
 	"github.com/syncthing/syncthing/lib/scanner"
 	"github.com/syncthing/syncthing/lib/sha256"
 	"github.com/syncthing/syncthing/lib/sync"
@@ -1089,10 +1089,7 @@ func (f *sendReceiveFolder) handleFile(file protocol.FileInfo, copyChan chan<- c
 	}
 
 	// Shuffle the blocks
-	for i := range blocks {
-		j := rand.Intn(i + 1)
-		blocks[i], blocks[j] = blocks[j], blocks[i]
-	}
+	rand.Shuffle(blocks)
 
 	events.Default.Log(events.ItemStarted, map[string]string{
 		"folder": f.folderID,

lib/model/queue.go

@@ -7,10 +7,10 @@
 package model
 
 import (
-	"math/rand"
 	"sort"
 	"time"
 
+	"github.com/syncthing/syncthing/lib/rand"
 	"github.com/syncthing/syncthing/lib/sync"
 )
 
@@ -103,11 +103,7 @@ func (q *jobQueue) Shuffle() {
 	q.mut.Lock()
 	defer q.mut.Unlock()
 
-	l := len(q.queued)
-	for i := range q.queued {
-		r := rand.Intn(l)
-		q.queued[i], q.queued[r] = q.queued[r], q.queued[i]
-	}
+	rand.Shuffle(q.queued)
 }
 
 func (q *jobQueue) Reset() {