feat: nameserver-policy support use rule-providers and reduce domain-set memory

common/pool/buffer_low_memory.go

@@ -0,0 +1,15 @@
+//go:build with_low_memory
+
+package pool
+
+const (
+	// io.Copy default buffer size is 32 KiB
+	// but the maximum packet size of vmess/shadowsocks is about 16 KiB
+	// so define a buffer of 20 KiB to reduce the memory of each TCP relay
+	RelayBufferSize = 16 * 1024
+
+	// RelayBufferSize uses 20KiB, but due to the allocator it will actually
+	// request 32Kib. Most UDPs are smaller than the MTU, and the TUN's MTU
+	// set to 9000, so the UDP Buffer size set to 16Kib
+	UDPBufferSize = 8 * 1024
+)

common/pool/buffer_standard.go

@@ -0,0 +1,15 @@
+//go:build !with_low_memory
+
+package pool
+
+const (
+	// io.Copy default buffer size is 32 KiB
+	// but the maximum packet size of vmess/shadowsocks is about 16 KiB
+	// so define a buffer of 20 KiB to reduce the memory of each TCP relay
+	RelayBufferSize = 20 * 1024
+
+	// RelayBufferSize uses 20KiB, but due to the allocator it will actually
+	// request 32Kib. Most UDPs are smaller than the MTU, and the TUN's MTU
+	// set to 9000, so the UDP Buffer size set to 16Kib
+	UDPBufferSize = 16 * 1024
+)

common/pool/pool.go

@@ -1,17 +1,5 @@
 package pool
 
-const (
-	// io.Copy default buffer size is 32 KiB
-	// but the maximum packet size of vmess/shadowsocks is about 16 KiB
-	// so define a buffer of 20 KiB to reduce the memory of each TCP relay
-	RelayBufferSize = 20 * 1024
-
-	// RelayBufferSize uses 20KiB, but due to the allocator it will actually
-	// request 32Kib. Most UDPs are smaller than the MTU, and the TUN's MTU
-	// set to 9000, so the UDP Buffer size set to 16Kib
-	UDPBufferSize = 16 * 1024
-)
-
 func Get(size int) []byte {
 	return defaultAllocator.Get(size)
 }

common/utils/strings.go

@@ -0,0 +1,9 @@
+package utils
+
+func Reverse(s string) string {
+	a := []rune(s)
+	for i, j := 0, len(a)-1; i < j; i, j = i+1, j-1 {
+		a[i], a[j] = a[j], a[i]
+	}
+	return string(a)
+}