2 * Copyright (C) 2018, 2019 "IoT.bzh"
3 * Author "Arthur Guyader" <arthur.guyader@iot.bzh>
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
21 #include "../../binding/low-can-hat.hpp"
22 #include "../../utils/converter.hpp"
23 #include "j1939-message.hpp"
26 * @brief Construct a new j1939 message t::j1939 message t object
29 j1939_message_t::j1939_message_t():
37 * @brief Construct a new j1939 message t::j1939 message t object
39 * @param length The length of the message
40 * @param format The format of the message
41 * @param data The vector data of the message
42 * @param timestamp The timetamp of the message
43 * @param name The name of the message
44 * @param pgn The PGN of the message
45 * @param addr The address of the message
47 j1939_message_t::j1939_message_t(uint32_t length,
48 std::vector<uint8_t>& data,
53 message_t(J1939_MAX_DLEN, length, J1939_PROTOCOL, data, timestamp),
60 /// @brief Retrieve name_ member value.
62 /// @return name_ class member
64 uint64_t j1939_message_t::get_name() const {
69 /// @brief Retrieve pgn_ member value.
71 /// @return pgn_ class member
73 uint32_t j1939_message_t::get_pgn() const{
78 /// @brief Retrieve addr_ member value.
80 /// @return addr_ class member
82 uint8_t j1939_message_t::get_addr() const{
87 * @brief Convert hex data to string
89 * @param data An array of data
90 * @param length The length of the data
91 * @return std::string The string data
93 std::string to_hex( uint8_t data[], const size_t length)
95 std::stringstream stream;
96 stream << std::hex << std::setfill('0');
97 for(int i = 0; i < length; i++)
99 stream << std::hex << ((int) data[i]);
104 /// @brief Take a sockaddr_can struct and array of data to initialize class members
106 /// This is the preferred way to initialize class members.
108 /// @param[in] addr - sockaddr_can to get pgn, name and addr
109 /// @param[in] data - array of data get from the j1939 socket
110 /// @param[in] nbytes - size of the array of data
111 /// @param[in] timestamp - timestamp of the message
113 /// @return A j1939_message_t object fully initialized with sockaddr_can and data values.
114 std::shared_ptr<j1939_message_t> j1939_message_t::convert_from_addr(struct sockaddr_can& addr, uint8_t (&data)[128], size_t nbytes, uint64_t timestamp)
118 std::vector<uint8_t> data_vector;
120 if(nbytes > J1939_MAX_DLEN)
122 AFB_DEBUG("Unsupported j1939 frame");
123 return std::make_shared<j1939_message_t>(j1939_message_t());
126 length = (uint32_t) nbytes;
127 data_vector.reserve(length);
131 std::string data_string;
132 data_string = converter_t::to_hex(data, length);
134 for(i=0;i<length;i++)
136 data_vector.push_back(data[i]);
139 AFB_DEBUG("Found pgn: %X, length: %X, data %s",
140 addr.can_addr.j1939.pgn, length, data_string.c_str());
142 return std::make_shared<j1939_message_t>(j1939_message_t(length, data_vector, timestamp, addr.can_addr.j1939.name, addr.can_addr.j1939.pgn, addr.can_addr.j1939.addr));
145 /// @brief Test if members pgn_ and length are set.
147 /// @return boolean - true = set - false = not set
148 bool j1939_message_t::is_set()
150 return (pgn_ != 0 && length_ != 0);
153 /// @brief Generate a string with informations about the message
155 /// @return Debug message with informations about members
156 std::string j1939_message_t::get_debug_message()
158 std::string ret = "";
159 ret = ret + "Here is the next j1939 message : pgn " + std::to_string(pgn_) + " length " + std::to_string(length_) + ", data ";
160 for (size_t i = 0; i < data_.size(); i++)
162 ret = ret + std::to_string(data_[i]);
168 /// @brief Retrieve pgn_ member value.
170 /// @return pgn_ class member
172 uint32_t j1939_message_t::get_id() const
174 AFB_DEBUG("Prefer method get_pgn() for j1939 messages");
178 void j1939_message_t::set_id(const canid_t id)
185 * @brief Return the sockname of the message
187 * @return struct sockaddr_can The sockname of the message
189 struct sockaddr_can j1939_message_t::get_sockname()
195 * @brief Allows to set a sockname at a message to send it after
197 * @param sockname The sockname of the message
199 void j1939_message_t::set_sockname(struct sockaddr_can sockname)
201 sockname_ = sockname;
205 * @brief Allows to generate a sockname for the message
207 * @param pgn The pgn for the sockname
208 * @param name The name for the sockname
209 * @param addr The address for the sockname
211 void j1939_message_t::set_sockname(pgn_t pgn, name_t name, uint8_t addr)
213 memset(&sockname_, 0, sizeof(sockname_));
214 sockname_.can_family = AF_CAN;
215 sockname_.can_ifindex = 0;
217 if(addr <= 0 || addr >= UINT8_MAX )
219 sockname_.can_addr.j1939.addr = J1939_NO_ADDR;
223 sockname_.can_addr.j1939.addr = addr;
226 if(name <= 0 || name >= UINT64_MAX )
228 sockname_.can_addr.j1939.name = J1939_NO_NAME;
232 sockname_.can_addr.j1939.name = name;
235 if(pgn <= 0 || pgn > J1939_PGN_MAX)
237 sockname_.can_addr.j1939.pgn = J1939_NO_PGN;
241 sockname_.can_addr.j1939.pgn = pgn;