1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "chpp/services/loopback.h"
18
19 #include <stdbool.h>
20 #include <stddef.h>
21 #include <stdint.h>
22 #include <string.h>
23
24 #include "chpp/app.h"
25 #include "chpp/log.h"
26 #include "chpp/memory.h"
27 #include "chpp/transport.h"
28
29 /************************************************
30 * Public Functions
31 ***********************************************/
32
chppDispatchLoopbackClientRequest(struct ChppAppState * context,uint8_t * buf,size_t len)33 bool chppDispatchLoopbackClientRequest(struct ChppAppState *context,
34 uint8_t *buf, size_t len) {
35 uint8_t *response = chppMalloc(len);
36 if (response == NULL) {
37 CHPP_LOG_OOM();
38 chppEnqueueTxErrorDatagram(context->transportContext,
39 CHPP_TRANSPORT_ERROR_OOM);
40
41 } else {
42 CHPP_LOGI("Looping back len=%" PRIuSIZE, len);
43
44 // Copy received datagram
45 memcpy(response, buf, len);
46
47 // Modify response message type per loopback spec.
48 struct ChppAppHeader *responseHeader = (struct ChppAppHeader *)response;
49 responseHeader->type = CHPP_MESSAGE_TYPE_SERVICE_RESPONSE;
50
51 // Send out response datagram
52 chppEnqueueTxDatagramOrFail(context->transportContext, response, len);
53 }
54
55 return true;
56 }
57
