From 7f197ede5157754f1aa3b703d911c1f0dad524da Mon Sep 17 00:00:00 2001
From: Skyxim <noreply@skyxim.com>
Date: Mon, 29 Aug 2022 12:10:46 +0800
Subject: [PATCH 1/3] fix: hysteria udp crash

---
 adapter/outbound/hysteria.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/adapter/outbound/hysteria.go b/adapter/outbound/hysteria.go
index adc904a2..9446cf93 100644
--- a/adapter/outbound/hysteria.go
+++ b/adapter/outbound/hysteria.go
@@ -72,6 +72,9 @@ func (h *Hysteria) ListenPacketContext(ctx context.Context, metadata *C.Metadata
 		hyDialer: func() (net.PacketConn, error) {
 			return dialer.ListenPacket(ctx, "udp", "", h.Base.DialOptions(opts...)...)
 		},
+		remoteAddr: func(addr string) (net.Addr, error) {
+			return resolveUDPAddrWithPrefer("udp", addr, h.prefer)
+		},
 	}
 	udpConn, err := h.client.DialUDP(&hdc)
 	if err != nil {

From d69e0bce4a065ea72c27fdd82b48da25b442adea Mon Sep 17 00:00:00 2001
From: Skyxim <noreply@skyxim.com>
Date: Mon, 29 Aug 2022 13:04:48 +0800
Subject: [PATCH 2/3] fix: resolve ip of udp proxy error

---
 adapter/outbound/util.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/adapter/outbound/util.go b/adapter/outbound/util.go
index 0b859630..d5219131 100644
--- a/adapter/outbound/util.go
+++ b/adapter/outbound/util.go
@@ -104,7 +104,7 @@ func resolveUDPAddrWithPrefer(network, address string, prefer C.DNSPrefer) (*net
 			ip = fallback
 		}
 	default:
-		// C.IPv4Prefer, C.DualStack and other 
+		// C.IPv4Prefer, C.DualStack and other
 		var ips []netip.Addr
 		ips, err = resolver.ResolveAllIPProxyServerHost(host)
 		var fallback netip.Addr
@@ -119,7 +119,10 @@ func resolveUDPAddrWithPrefer(network, address string, prefer C.DNSPrefer) (*net
 					}
 				}
 			}
-			ip = fallback
+
+			if !ip.IsValid() && fallback.IsValid() {
+				ip = fallback
+			}
 		}
 	}
 

From d823dde43c537f8fdcb77c6a06af58a73046b2e8 Mon Sep 17 00:00:00 2001
From: Skyxim <noreply@skyxim.com>
Date: Mon, 29 Aug 2022 13:07:38 +0800
Subject: [PATCH 3/3] chore: update doc

---
 docs/config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/config.yaml b/docs/config.yaml
index 9240bf96..53ed7416 100644
--- a/docs/config.yaml
+++ b/docs/config.yaml
@@ -169,7 +169,7 @@ proxies:
                        # ipv4-prefer：优先使用 IPv4 对于 TCP 会进行双栈解析，并发链接但是优先使用 IPv4 链接,
                        # UDP 则为双栈解析，获取结果中的第一个 IPv4
                        # ipv6-prefer 同 ipv4-prefer
-                       # 现有协议都支持此参数
+                       # 现有协议都支持此参数，TCP 效果仅在开启 tcp-concurrent 生效
   - name: "ss2"
     type: ss
     server: server