mosdns: fix udp server

mosdns/patches/110-fixed-715.patch

@@ -0,0 +1,45 @@
+From 2eaae3d11ea6b6954e820c48c36b9122e3882562 Mon Sep 17 00:00:00 2001
+From: Irine Sistiana <49315432+IrineSistiana@users.noreply.github.com>
+Date: Tue, 19 Sep 2023 07:59:17 +0800
+Subject: [PATCH] fixed #715
+
+---
+ pkg/server/udp.go | 11 ++++++-----
+ 1 file changed, 6 insertions(+), 5 deletions(-)
+
+diff --git a/pkg/server/udp.go b/pkg/server/udp.go
+index a1e478b..8bb1b85 100644
+--- a/pkg/server/udp.go
++++ b/pkg/server/udp.go
+@@ -66,14 +66,15 @@ func (s *UDPServer) ServeUDP(c *net.UDPConn) error {
+ 	if err != nil {
+ 		return fmt.Errorf("failed to init oob handler, %w", err)
+ 	}
+-	var ob *[]byte
++	var ob []byte
+ 	if oobReader != nil {
+-		ob = pool.GetBuf(1024)
+-		defer pool.ReleaseBuf(ob)
++		obp := pool.GetBuf(1024)
++		defer pool.ReleaseBuf(obp)
++		ob = *obp
+ 	}
+ 
+ 	for {
+-		n, oobn, _, remoteAddr, err := c.ReadMsgUDPAddrPort(*rb, *ob)
++		n, oobn, _, remoteAddr, err := c.ReadMsgUDPAddrPort(*rb, ob)
+ 		if err != nil {
+ 			return fmt.Errorf("unexpected read err: %w", err)
+ 		}
+@@ -88,7 +89,7 @@ func (s *UDPServer) ServeUDP(c *net.UDPConn) error {
+ 		var dstIpFromCm net.IP
+ 		if oobReader != nil {
+ 			var err error
+-			dstIpFromCm, err = oobReader((*ob)[:oobn])
++			dstIpFromCm, err = oobReader(ob[:oobn])
+ 			if err != nil {
+ 				s.opts.Logger.Error("failed to get dst address from oob", zap.Error(err))
+ 			}
+-- 
+2.34.8
+