1 /*
2 * Copyright (C) 2017 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 "host/commands/virtual_usb_manager/usbip/server.h"
18
19 #include <glog/logging.h>
20 #include <netinet/in.h>
21 #include "common/libs/fs/shared_select.h"
22
23 using cvd::SharedFD;
24
25 namespace vadb {
26 namespace usbip {
Server(const std::string & name,const DevicePool & devices)27 Server::Server(const std::string& name, const DevicePool& devices)
28 : name_{name}, device_pool_{devices} {}
29
Init()30 bool Server::Init() { return CreateServerSocket(); }
31
32 // Open new listening server socket.
33 // Returns false, if listening socket could not be created.
CreateServerSocket()34 bool Server::CreateServerSocket() {
35 LOG(INFO) << "Starting server socket: " << name_;
36
37 server_ = SharedFD::SocketLocalServer(name_.c_str(), true, SOCK_STREAM, 0700);
38 if (!server_->IsOpen()) {
39 LOG(ERROR) << "Could not create socket: " << server_->StrError();
40 return false;
41 }
42 return true;
43 }
44
BeforeSelect(cvd::SharedFDSet * fd_read) const45 void Server::BeforeSelect(cvd::SharedFDSet* fd_read) const {
46 fd_read->Set(server_);
47 for (const auto& client : clients_) client.BeforeSelect(fd_read);
48 }
49
AfterSelect(const cvd::SharedFDSet & fd_read)50 void Server::AfterSelect(const cvd::SharedFDSet& fd_read) {
51 if (fd_read.IsSet(server_)) HandleIncomingConnection();
52
53 for (auto iter = clients_.begin(); iter != clients_.end();) {
54 if (!iter->AfterSelect(fd_read)) {
55 // If client conversation failed, hang up.
56 iter = clients_.erase(iter);
57 continue;
58 }
59 ++iter;
60 }
61 }
62
63 // Accept new USB/IP connection. Add it to client pool.
HandleIncomingConnection()64 void Server::HandleIncomingConnection() {
65 SharedFD client = SharedFD::Accept(*server_, nullptr, nullptr);
66 if (!client->IsOpen()) {
67 LOG(ERROR) << "Client connection failed: " << client->StrError();
68 return;
69 }
70
71 clients_.emplace_back(device_pool_, client);
72 }
73 } // namespace usbip
74 } // namespace vadb
75