1 /*
2 * Copyright (C) 2024 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 <android/binder_libbinder.h>
18 #include <binder/RpcServer.h>
19 #include <binder/RpcServerTrusty.h>
20 #include <binder/RpcSession.h>
21 #include <binder/RpcTransportTipcTrusty.h>
22
23 using android::RpcServer;
24 using android::RpcServerTrusty;
25 using android::RpcSession;
26 using android::RpcTransportCtxFactoryTipcTrusty;
27 using android::sp;
28 using android::wp;
29
30 struct ARpcServerTrusty {
31 sp<RpcServer> mRpcServer;
32
33 ARpcServerTrusty() = delete;
ARpcServerTrustyARpcServerTrusty34 ARpcServerTrusty(sp<RpcServer> rpcServer) : mRpcServer(std::move(rpcServer)) {}
35 };
36
ARpcServerTrusty_newPerSession(AIBinder * (* cb)(const void *,size_t,char *),char * cbArg,void (* cbArgDeleter)(char *))37 ARpcServerTrusty* ARpcServerTrusty_newPerSession(AIBinder* (*cb)(const void*, size_t, char*),
38 char* cbArg, void (*cbArgDeleter)(char*)) {
39 std::shared_ptr<char> cbArgSp(cbArg, cbArgDeleter);
40
41 auto rpcTransportCtxFactory = RpcTransportCtxFactoryTipcTrusty::make();
42 if (rpcTransportCtxFactory == nullptr) {
43 return nullptr;
44 }
45
46 auto ctx = rpcTransportCtxFactory->newServerCtx();
47 if (ctx == nullptr) {
48 return nullptr;
49 }
50
51 auto rpcServer = RpcServerTrusty::makeRpcServer(std::move(ctx));
52 if (rpcServer == nullptr) {
53 return nullptr;
54 }
55
56 rpcServer->setPerSessionRootObject(
57 [cb, cbArgSp](wp<RpcSession> /*session*/, const void* addrPtr, size_t len) {
58 auto* aib = (*cb)(addrPtr, len, cbArgSp.get());
59 auto b = AIBinder_toPlatformBinder(aib);
60
61 // We have a new sp<IBinder> backed by the same binder, so we can
62 // finally release the AIBinder* from the callback
63 AIBinder_decStrong(aib);
64
65 return b;
66 });
67
68 return new (std::nothrow) ARpcServerTrusty(std::move(rpcServer));
69 }
70
ARpcServerTrusty_delete(ARpcServerTrusty * rstr)71 void ARpcServerTrusty_delete(ARpcServerTrusty* rstr) {
72 delete rstr;
73 }
74
ARpcServerTrusty_handleConnect(ARpcServerTrusty * rstr,handle_t chan,const uuid * peer,void ** ctx_p)75 int ARpcServerTrusty_handleConnect(ARpcServerTrusty* rstr, handle_t chan, const uuid* peer,
76 void** ctx_p) {
77 return RpcServerTrusty::handleConnectInternal(rstr->mRpcServer.get(), chan, peer, ctx_p);
78 }
79
ARpcServerTrusty_handleMessage(void * ctx)80 int ARpcServerTrusty_handleMessage(void* ctx) {
81 return RpcServerTrusty::handleMessageInternal(ctx);
82 }
83
ARpcServerTrusty_handleDisconnect(void * ctx)84 void ARpcServerTrusty_handleDisconnect(void* ctx) {
85 RpcServerTrusty::handleDisconnectInternal(ctx);
86 }
87
ARpcServerTrusty_handleChannelCleanup(void * ctx)88 void ARpcServerTrusty_handleChannelCleanup(void* ctx) {
89 RpcServerTrusty::handleChannelCleanup(ctx);
90 }
91