feat: support sudp proxy (#1730)

tests/ci/auto_test_frpc.ini

@@ -72,6 +72,12 @@ local_port = 10701
 use_encryption = true
 use_compression = true
 
+[sudp]
+type = sudp
+sk = abcdefg
+local_ip = 127.0.0.1
+local_port = 10702
+
 [web01]
 type = http
 local_ip = 127.0.0.1

tests/ci/auto_test_frpc_visitor.ini

@@ -23,3 +23,12 @@ bind_addr = 127.0.0.1
 bind_port = 10905
 use_encryption = true
 use_compression = true
+
+
+[sudp_visitor]
+type = sudp
+role = visitor
+server_name = sudp
+sk = abcdefg
+bind_addr = 127.0.0.1
+bind_port = 10816

tests/ci/normal_test.go

@@ -118,6 +118,16 @@ func TestStcp(t *testing.T) {
 	}
 }
 
+func TestSudp(t *testing.T) {
+	assert := assert.New(t)
+	// Normal
+	addr := fmt.Sprintf("127.0.0.1:%d", consts.TEST_SUDP_FRP_PORT)
+	res, err := util.SendUdpMsg(addr, consts.TEST_SUDP_ECHO_STR)
+
+	assert.NoError(err)
+	assert.Equal(consts.TEST_SUDP_ECHO_STR, res)
+}
+
 func TestHttp(t *testing.T) {
 	assert := assert.New(t)
 	// web01