1 /*-------------------------------------------------------------------------
2 * Vulkan CTS Framework
3 * --------------------
4 *
5 * Copyright (c) 2021 The Khronos Group Inc.
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 *-------------------------------------------------------------------------*/
20
21 #include "vksNetwork.hpp"
22 #include "vksSerializer.hpp"
23
24 #include <sstream>
25
26 #include "deSocket.hpp"
27
28 namespace vksc_server
29 {
30
StringToAddress(const string & str,string & host,int & port)31 void StringToAddress(const string &str, string &host, int &port)
32 {
33 auto pos = str.find_last_of(':');
34 if (pos == string::npos)
35 {
36 host = str.c_str();
37 port = DefaultPort;
38 }
39 else
40 {
41 host = str.substr(0, pos);
42 std::stringstream{str.substr(pos + 1)} >> port;
43 }
44 }
45
ProccessNetworkData(vector<u8> & buffer,const std::function<void (u32,vector<u8>)> & packetInterpreter)46 bool ProccessNetworkData(vector<u8> &buffer, const std::function<void(u32, vector<u8>)> &packetInterpreter)
47 {
48 constexpr msize headerSize = 8;
49
50 if (buffer.size() >= headerSize)
51 {
52 u32 classHash;
53 u32 packetSize;
54
55 Serializer<ToRead>{buffer}.Serialize(classHash, packetSize);
56
57 if (buffer.size() >= packetSize + headerSize)
58 {
59 auto itbeging = buffer.begin() + headerSize;
60 auto itend = itbeging + packetSize;
61 packetInterpreter(classHash, vector<u8>(itbeging, itend));
62 buffer.erase(buffer.begin(), itend);
63 return buffer.size() >= headerSize; // Try again?
64 }
65 }
66
67 return false;
68 }
69
Send(de::Socket * socket,const vector<u8> & buffer)70 void Send(de::Socket *socket, const vector<u8> &buffer)
71 {
72 msize sent_total{};
73 do
74 {
75 msize sent{};
76 auto result = socket->send(buffer.data() + sent_total, buffer.size() - sent_total, &sent);
77 if (result != DE_SOCKETRESULT_SUCCESS)
78 throw std::runtime_error("Can't send data to socket");
79 sent_total += sent;
80 } while (sent_total < buffer.size());
81 }
82
RecvSome(de::Socket * socket,vector<u8> & recvb)83 void RecvSome(de::Socket *socket, vector<u8> &recvb)
84 {
85 msize received;
86 u8 data[8 * 1024];
87 auto result = socket->receive(data, sizeof(data), &received);
88 if (result != DE_SOCKETRESULT_SUCCESS)
89 throw std::runtime_error("Can't receive data from socket");
90 recvb.insert(recvb.end(), data, data + received);
91 }
92
SendPayloadWithHeader(de::Socket * socket,u32 type,const std::vector<u8> & payload)93 void SendPayloadWithHeader(de::Socket *socket, u32 type, const std::vector<u8> &payload)
94 {
95 u32 size = static_cast<u32>(payload.size());
96
97 vector<u8> header;
98 Serializer<ToWrite> header_serializer(header);
99 header_serializer.Serialize(type, size);
100
101 Send(socket, header);
102 Send(socket, payload);
103 }
104
RecvPacket(de::Socket * socket,vector<u8> & recvb,u32 type)105 vector<u8> RecvPacket(de::Socket *socket, vector<u8> &recvb, u32 type)
106 {
107 bool result = false;
108 vector<u8> packet;
109
110 while (socket->isConnected() && !result)
111 {
112 RecvSome(socket, recvb);
113
114 auto interpret = [&](u32 classHash, vector<u8> bufferData)
115 {
116 if (classHash != type)
117 throw std::runtime_error("Unexpected packet type received");
118 packet = std::move(bufferData);
119 result = true;
120 };
121
122 ProccessNetworkData(recvb, interpret);
123 }
124
125 if (!result)
126 throw std::runtime_error("connection lost before we could get data");
127
128 return packet;
129 }
130
131 }; // namespace vksc_server
132