SNode.C
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Receiver.h
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1/*
2 * SNode.C - A Slim Toolkit for Network Communication
3 * Copyright (C) Volker Christian <me@vchrist.at>
4 * 2020, 2021, 2022, 2023, 2024, 2025
5 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU Lesser General Public License as published
8 * by the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20/*
21 * MIT License
22 *
23 * Permission is hereby granted, free of charge, to any person obtaining a copy
24 * of this software and associated documentation files (the "Software"), to deal
25 * in the Software without restriction, including without limitation the rights
26 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
27 * copies of the Software, and to permit persons to whom the Software is
28 * furnished to do so, subject to the following conditions:
29 *
30 * The above copyright notice and this permission notice shall be included in
31 * all copies or substantial portions of the Software.
32 *
33 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
34 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
35 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
36 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
37 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
38 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
39 * THE SOFTWARE.
40 */
41
42#ifndef WEB_WEBSOCKET_RECEVIER_H
43#define WEB_WEBSOCKET_RECEVIER_H
44
45#ifndef DOXYGEN_SHOULD_SKIP_THIS
46
47#include <cstddef>
48#include <cstdint>
49
50#endif /* DOXYGEN_SHOULD_SKIP_THIS */
51
52namespace web::websocket {
53
54 class Receiver {
55 public:
56 Receiver(bool maskingExpected);
57
58 Receiver(const Receiver&) = delete;
59 Receiver& operator=(const Receiver&) = delete;
60
61 virtual ~Receiver();
62
63 std::size_t receive();
64
65 std::size_t getPayloadTotalRead() const;
66
67 private:
68 std::size_t readFrameData(char* chunk, std::size_t chunkLen);
69
70 std::size_t readOpcode();
71 std::size_t readLength();
72 std::size_t readELength();
73 std::size_t readMaskingKey();
74 std::size_t readPayload();
75
76 std::size_t readELength2();
77 std::size_t readELength8();
78
79 virtual void onMessageStart(int opCode) = 0;
80 virtual void onMessageData(const char* chunk, uint64_t chunkLen) = 0;
81 virtual void onMessageEnd() = 0;
82 virtual void onMessageError(uint16_t errnum) = 0;
83
84 void reset();
85
86 virtual std::size_t readFrameChunk(char* chunk, std::size_t chunkLen) const = 0;
87
88 // Parser state
90
91 bool fin = false;
92 bool continuation = false;
93 bool masked = false;
94
95 bool maskingExpected = false;
96
97 uint8_t opCode = 0;
98
99 char maskingKey[4];
100
101 union ELength8 {
102 uint64_t asValue;
103 char asBytes[8];
104 } eLength8{};
105
106 union ELength2 {
107 uint16_t asValue;
108 char asBytes[2];
109 } eLength2{};
110
111 uint8_t elengthNumBytes = 0;
113
114 uint64_t payloadNumBytes = 0;
116
119
120 uint16_t errorState = 0;
121
122 std::size_t payloadTotalRead = 0;
123 };
124
125} // namespace web::websocket
126
127#endif // WEB_WEBSOCKET_RECEVIER_H
128
129// |Opcode | Meaning | Reference |
130// -+--------+-------------------------------------+-----------|
131// | 0 | Continuation Frame | RFC XXXX |
132// -+--------+-------------------------------------+-----------|
133// | 1 | Text Frame | RFC XXXX |
134// -+--------+-------------------------------------+-----------|
135// | 2 | Binary Frame | RFC XXXX |
136// -+--------+-------------------------------------+-----------|
137// | 8 | Connection Close Frame | RFC XXXX |
138// -+--------+-------------------------------------+-----------|
139// | 9 | Ping Frame | RFC XXXX |
140// -+--------+-------------------------------------+-----------|
141// | 10 | Pong Frame | RFC XXXX |
142// -+--------+-------------------------------------+-----------|
virtual std::size_t recv(char *chunk, std::size_t chunklen)=0
std::size_t onReceivedFromPeer()
MqttContext(const MqttContext &)=default
MqttContext & operator=(const MqttContext &)=default
virtual void send(const char *chunk, std::size_t chunklen)=0
virtual core::socket::stream::SocketConnection * getSocketConnection() const =0
virtual void end(bool fatal=false)=0
virtual void close()=0
void onEvent(const utils::Timeval &currentTime) override
OnReceivedFromPeerEvent(const std::function< void(const utils::Timeval &)> &onReceivedFromPeer)
std::function< void(const utils::Timeval &)> onReceivedFromPeer
Definition SubProtocol.h:79
void onMessageError(uint16_t errnum) override
bool onSignal(int sig) override
void send(const char *chunk, std::size_t chunklen) override
void onDisconnected() override
void onConnected() override
void close() override
void end(bool fatal=false) override
core::socket::stream::SocketConnection * getSocketConnection() const override
std::size_t recv(char *chunk, std::size_t chunklen) override
std::vector< char > buffer
OnReceivedFromPeerEvent onReceivedFromPeerEvent
void onMessageData(const char *chunk, std::size_t chunkLen) override
SubProtocol(web::websocket::SubProtocolContext *subProtocolContext, const std::string &name, iot::mqtt::Mqtt *mqtt)
void onMessageEnd() override
void onMessageStart(int opCode) override
~SubProtocol() override=default
std::size_t readELength2()
Definition Receiver.cpp:180
virtual void onMessageEnd()=0
std::size_t receive()
Definition Receiver.cpp:67
virtual void onMessageStart(int opCode)=0
std::size_t readLength()
Definition Receiver.cpp:138
std::size_t readMaskingKey()
Definition Receiver.cpp:242
Receiver & operator=(const Receiver &)=delete
std::size_t readELength()
Definition Receiver.cpp:216
Receiver(bool maskingExpected)
Definition Receiver.cpp:60
std::size_t readFrameData(char *chunk, std::size_t chunkLen)
Definition Receiver.cpp:108
virtual void onMessageData(const char *chunk, uint64_t chunkLen)=0
virtual std::size_t readFrameChunk(char *chunk, std::size_t chunkLen) const =0
virtual void onMessageError(uint16_t errnum)=0
std::size_t readPayload()
Definition Receiver.cpp:267
Receiver(const Receiver &)=delete
std::size_t readOpcode()
Definition Receiver.cpp:112
std::size_t readELength8()
Definition Receiver.cpp:198
std::size_t payloadTotalRead
Definition Receiver.h:122
std::size_t getPayloadTotalRead() const
Definition Receiver.cpp:104
virtual void sendMessage(uint8_t opCode, const char *message, std::size_t messageLength)=0
virtual void sendPing(const char *reason=nullptr, std::size_t reasonLength=0)=0
virtual std::size_t getPayloadTotalSent() const =0
virtual void sendMessageFrame(const char *message, std::size_t messageLength)=0
SubProtocolContext & operator=(const SubProtocolContext &)=delete
virtual void sendPong(const char *reason=nullptr, std::size_t reasonLength=0)=0
virtual std::string getOnlineSince() const =0
virtual void sendClose(const char *message, std::size_t messageLength)=0
virtual std::size_t getPayloadTotalRead() const =0
virtual void sendMessageEnd(const char *message, std::size_t messageLength)=0
virtual void sendClose(uint16_t statusCode=1000, const char *reason=nullptr, std::size_t reasonLength=0)=0
virtual void sendMessageStart(uint8_t opCode, const char *message, std::size_t messageLength)=0
virtual core::socket::stream::SocketConnection * getSocketConnection() const =0
virtual std::string getOnlineDuration() const =0
SubProtocolContext(const SubProtocolContext &)=delete
sighandler_t signal(int sig, sighandler_t handler)
Definition signal.cpp:54
std::string sigabbrev_np(int sig)
Definition signal.cpp:59
std::string hexDump(const std::vector< char > &bytes, int prefixLength, bool prefixAtFirstLine)
Definition hexdump.cpp:58