Add VLESS server, vision flow and reality TLS

transport/vless/constant.go

@@ -0,0 +1,34 @@
+package vless
+
+import (
+	"bytes"
+
+	"github.com/sagernet/sing/common/buf"
+)
+
+var (
+	tls13SupportedVersions  = []byte{0x00, 0x2b, 0x00, 0x02, 0x03, 0x04}
+	tlsClientHandShakeStart = []byte{0x16, 0x03}
+	tlsServerHandShakeStart = []byte{0x16, 0x03, 0x03}
+	tlsApplicationDataStart = []byte{0x17, 0x03, 0x03}
+)
+
+var tls13CipherSuiteDic = map[uint16]string{
+	0x1301: "TLS_AES_128_GCM_SHA256",
+	0x1302: "TLS_AES_256_GCM_SHA384",
+	0x1303: "TLS_CHACHA20_POLY1305_SHA256",
+	0x1304: "TLS_AES_128_CCM_SHA256",
+	0x1305: "TLS_AES_128_CCM_8_SHA256",
+}
+
+func reshapeBuffer(b []byte) []*buf.Buffer {
+	const bufferLimit = 8192 - 21
+	if len(b) < bufferLimit {
+		return []*buf.Buffer{buf.As(b)}
+	}
+	index := int32(bytes.LastIndex(b, tlsApplicationDataStart))
+	if index <= 0 {
+		index = 8192 / 2
+	}
+	return []*buf.Buffer{buf.As(b[:index]), buf.As(b[index:])}
+}