kopia lustrzana https://github.com/weetmuts/wmbusmeters
425 wiersze
13 KiB
C++
425 wiersze
13 KiB
C++
/*
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Copyright (C) 2019-2020 Fredrik Öhrström
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include"wmbus.h"
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#include"wmbus_common_implementation.h"
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#include"wmbus_utils.h"
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#include"rtlsdr.h"
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#include"serial.h"
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#include<assert.h>
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#include<fcntl.h>
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#include<grp.h>
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#include<pthread.h>
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#include<semaphore.h>
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#include<string.h>
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#include<errno.h>
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#include<sys/stat.h>
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#include<sys/types.h>
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#include<unistd.h>
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using namespace std;
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struct WMBusRTLWMBUS : public virtual WMBusCommonImplementation
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{
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bool ping();
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string getDeviceId();
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string getDeviceUniqueId();
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LinkModeSet getLinkModes();
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void deviceReset();
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void deviceSetLinkModes(LinkModeSet lms);
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LinkModeSet supportedLinkModes() {
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return
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C1_bit |
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S1_bit |
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T1_bit;
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}
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int numConcurrentLinkModes() { return 3; }
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bool canSetLinkModes(LinkModeSet lms)
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{
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//if (!supportedLinkModes().supports(lms)) return false;
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// The rtlwmbus listens to both modes always.
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return true;
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}
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void processSerialData();
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void simulate();
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WMBusRTLWMBUS(string alias, string serialnr, shared_ptr<SerialDevice> serial, shared_ptr<SerialCommunicationManager> manager);
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~WMBusRTLWMBUS() { }
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private:
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string serialnr_;
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vector<uchar> read_buffer_;
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vector<uchar> received_payload_;
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bool warning_dll_len_printed_ {};
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LinkModeSet device_link_modes_;
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FrameStatus checkRTLWMBUSFrame(vector<uchar> &data,
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size_t *hex_frame_length,
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int *hex_payload_len_out,
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int *hex_payload_offset,
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double *rssi);
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void handleMessage(vector<uchar> &frame);
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string setup_;
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};
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shared_ptr<WMBus> openRTLWMBUS(Detected detected,
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string bin_dir,
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bool daemon,
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shared_ptr<SerialCommunicationManager> manager,
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shared_ptr<SerialDevice> serial_override)
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{
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string bus_alias = detected.specified_device.bus_alias;
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string identifier = detected.found_device_id;
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SpecifiedDevice &device = detected.specified_device;
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string command;
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int id = 0;
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map<string,string> extras;
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bool ok = parseExtras(detected.specified_device.extras, &extras);
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if (!ok)
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{
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error("(rtlwmbus) invalid extra parameters to rtlwmbus (%s)\n", detected.specified_device.extras.c_str());
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}
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string ppm = "";
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if (extras.size() > 0)
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{
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if (extras.count("ppm") > 0)
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{
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ppm = string("-p ")+extras["ppm"];
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}
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}
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if (!serial_override)
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{
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id = indexFromRtlSdrSerial(identifier);
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command = "";
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if (device.command != "")
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{
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command = device.command;
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identifier = "cmd_"+to_string(device.index);
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}
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string freq = "868.625M";
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bool force_freq = false;
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if (device.fq != "")
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{
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freq = device.fq;
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// This will disable the listen to s1,t1 and c1 at the same time setting.
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force_freq = true;
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}
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string rtl_sdr;
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string rtl_wmbus;
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rtl_sdr = lookForExecutable("rtl_sdr", bin_dir, "/usr/bin");
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if (rtl_sdr == "")
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{
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if (daemon)
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{
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error("(rtlwmbus) error: when starting as daemon, wmbusmeters looked for %s/rtl_sdr and %s/rtl_sdr, but found neither!\n",
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bin_dir.c_str(), "/usr/bin");
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}
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else
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{
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// Look for it in the PATH
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rtl_sdr = "rtl_sdr";
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}
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}
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rtl_wmbus = lookForExecutable("rtl_wmbus", bin_dir, "/usr/bin");
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if (rtl_wmbus == "")
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{
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if (daemon)
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{
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error("(rtlwmbus) error: when starting as daemon, wmbusmeters looked for %s/rtl_wmbus and %s/rtl_wmbus, but found neither!\n",
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bin_dir.c_str(), "/usr/bin");
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}
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else
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{
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// Look for it in the PATH
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rtl_wmbus = "rtl_wmbus";
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}
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}
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if (command == "")
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{
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if (!force_freq)
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{
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command = rtl_sdr+" "+ppm+" -d "+to_string(id)+" -f "+freq+" -s 1.6e6 - 2>/dev/null | "+rtl_wmbus+" -s";
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}
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else
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{
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command = rtl_sdr+" "+ppm+" -d "+to_string(id)+" -f "+freq+" -s 1.6e6 - 2>/dev/null | "+rtl_wmbus;
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}
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}
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verbose("(rtlwmbus) using command: %s\n", command.c_str());
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}
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debug("(rtlwmbus) opening %s\n", identifier.c_str());
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vector<string> args;
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vector<string> envs;
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args.push_back("-c");
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args.push_back(command);
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if (serial_override)
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{
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WMBusRTLWMBUS *imp = new WMBusRTLWMBUS(bus_alias, identifier, serial_override, manager);
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imp->markSerialAsOverriden();
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return shared_ptr<WMBus>(imp);
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}
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auto serial = manager->createSerialDeviceCommand(identifier, "/bin/sh", args, envs, "rtlwmbus");
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WMBusRTLWMBUS *imp = new WMBusRTLWMBUS(bus_alias, identifier, serial, manager);
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return shared_ptr<WMBus>(imp);
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}
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WMBusRTLWMBUS::WMBusRTLWMBUS(string alias, string serialnr, shared_ptr<SerialDevice> serial, shared_ptr<SerialCommunicationManager> manager) :
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WMBusCommonImplementation(alias, DEVICE_RTLWMBUS, manager, serial, false), serialnr_(serialnr)
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{
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reset();
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}
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bool WMBusRTLWMBUS::ping()
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{
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return true;
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}
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string WMBusRTLWMBUS::getDeviceId()
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{
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return serialnr_;
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}
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string WMBusRTLWMBUS::getDeviceUniqueId()
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{
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return "?";
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}
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LinkModeSet WMBusRTLWMBUS::getLinkModes()
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{
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return device_link_modes_;
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}
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void WMBusRTLWMBUS::deviceReset()
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{
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}
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void WMBusRTLWMBUS::deviceSetLinkModes(LinkModeSet lm)
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{
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LinkModeSet lms;
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lms.addLinkMode(LinkMode::C1);
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lms.addLinkMode(LinkMode::T1);
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device_link_modes_ = lms;
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}
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void WMBusRTLWMBUS::simulate()
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{
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}
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void WMBusRTLWMBUS::processSerialData()
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{
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vector<uchar> data;
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// Receive and accumulated serial data until a full frame has been received.
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serial()->receive(&data);
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read_buffer_.insert(read_buffer_.end(), data.begin(), data.end());
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size_t frame_length;
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int hex_payload_len, hex_payload_offset;
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for (;;)
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{
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double rssi = 0;
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FrameStatus status = checkRTLWMBUSFrame(read_buffer_, &frame_length, &hex_payload_len, &hex_payload_offset, &rssi);
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if (status == PartialFrame)
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{
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break;
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}
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if (status == TextAndNotFrame)
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{
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// The buffer has already been printed by serial cmd.
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read_buffer_.clear();
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break;
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}
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if (status == ErrorInFrame)
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{
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debug("(rtlwmbus) error in received message.\n");
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read_buffer_.clear();
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break;
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}
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if (status == FullFrame)
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{
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vector<uchar> payload;
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if (hex_payload_len > 0)
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{
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vector<uchar> hex;
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hex.insert(hex.end(), read_buffer_.begin()+hex_payload_offset, read_buffer_.begin()+hex_payload_offset+hex_payload_len);
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bool ok = hex2bin(hex, &payload);
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if (!ok)
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{
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if (hex.size() % 2 == 1)
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{
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payload.clear();
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warning("(rtlwmbus) warning: the hex string is not an even multiple of two! Dropping last char.\n");
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hex.pop_back();
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ok = hex2bin(hex, &payload);
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}
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if (!ok)
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{
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warning("(rtlwmbus) warning: the hex string contains bad characters! Decode stopped partway.\n");
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}
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}
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}
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read_buffer_.erase(read_buffer_.begin(), read_buffer_.begin()+frame_length);
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if (payload.size() > 0)
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{
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if (payload[0] != payload.size()-1)
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{
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if (!warning_dll_len_printed_)
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{
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warning("(rtlwmbus) dll_len adjusted to %d from %d. Upgrade rtl_wmbus? This warning will not be printed again.\n", payload.size()-1, payload[0]);
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warning_dll_len_printed_ = true;
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}
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payload[0] = payload.size()-1;
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}
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}
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string id = string("rtlwmbus[")+getDeviceId()+"]";
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AboutTelegram about(id, rssi, FrameType::WMBUS);
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handleTelegram(about, payload);
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}
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}
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}
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FrameStatus WMBusRTLWMBUS::checkRTLWMBUSFrame(vector<uchar> &data,
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size_t *hex_frame_length,
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int *hex_payload_len_out,
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int *hex_payload_offset,
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double *rssi)
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{
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// C1;1;1;2019-02-09 07:14:18.000;117;102;94740459;0x49449344590474943508780dff5f3500827f0000f10007b06effff530100005f2c620100007f2118010000008000800080008000000000000000000e003f005500d4ff2f046d10086922
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// There might be a second telegram on the same line ;0x4944.......
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if (data.size() == 0) return PartialFrame;
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if (isDebugEnabled())
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{
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string msg = safeString(data);
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debug("(rtlwmbus) checkRTLWMBusFrame \"%s\"\n", msg.c_str());
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}
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int payload_len = 0;
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size_t eolp = 0;
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// Look for end of line
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for (; eolp < data.size(); ++eolp) {
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if (data[eolp] == '\n') break;
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}
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if (eolp >= data.size())
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{
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debug("(rtlwmbus) no eol found, partial frame\n");
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return PartialFrame;
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}
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// We got a full line, but if it is too short, then
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// there is something wrong. Discard the data.
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if (data.size() < 10)
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{
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debug("(rtlwmbus) too short line\n");
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return ErrorInFrame;
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}
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if (data[0] != '0' || data[1] != 'x')
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{
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// Discard lines that do not begin with T1 or C1, these lines are probably
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// stderr output from rtl_sdr/rtl_wmbus.
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if (!(data[0] == 'T' && data[1] == '1') &&
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!(data[0] == 'C' && data[1] == '1') &&
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!(data[0] == 'S' && data[1] == '1'))
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{
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debug("(rtlwmbus) only text\n");
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return TextAndNotFrame;
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}
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// And the checksums should match.
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if (strncmp((const char*)&data[1], "1;1", 3))
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{
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// Packages that begin with C1;1 or with T1;1 or with S1;1 are good. The full format is:
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// MODE;CRC_OK;3OUTOF6OK;TIMESTAMP;PACKET_RSSI;CURRENT_RSSI;LINK_LAYER_IDENT_NO;DATAGRAM_WITHOUT_CRC_BYTES.
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// 3OUTOF6OK makes sense only with mode T1 and no sense with mode C1 (always set to 1).
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if (!strncmp((const char*)&data[1], "1;0", 3)) {
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verbose("(rtlwmbus) telegram received but incomplete or with errors, since rtl_wmbus reports that CRC checks failed.\n");
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}
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return ErrorInFrame;
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}
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}
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size_t i = 0;
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int count = 0;
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// Look for packet rssi
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for (; i+1 < data.size(); ++i) {
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if (data[i] == ';') count++;
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if (count == 4) break;
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}
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if (count == 4)
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{
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size_t from = i+1;
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for (i++; i<data.size(); ++i) {
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if (data[i] == ';') break;
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}
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if ((i-from)<5)
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{
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string rssis = string(data.begin()+from,data.begin()+i);
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*rssi = atof(rssis.c_str());
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}
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}
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// Look for start of telegram 0x
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for (; i+1 < data.size(); ++i) {
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if (data[i] == '0' && data[i+1] == 'x') break;
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}
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if (i+1 >= data.size())
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{
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return ErrorInFrame; // No 0x found, then discard the frame.
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}
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i+=2; // Skip 0x
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// Look for end of line or semicolon.
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for (eolp=i; eolp < data.size(); ++eolp) {
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if (data[eolp] == '\n') break;
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if (data[eolp] == ';' && data[eolp+1] == '0' && data[eolp+2] == 'x') break;
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}
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if (eolp >= data.size())
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{
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debug("(rtlwmbus) no eol or semicolon, partial frame\n");
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return PartialFrame;
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}
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payload_len = eolp-i;
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*hex_payload_len_out = payload_len;
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*hex_payload_offset = i;
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*hex_frame_length = eolp+1;
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debug("(rtlwmbus) received full frame\n");
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return FullFrame;
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}
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AccessCheck detectRTLWMBUS(Detected *detected, shared_ptr<SerialCommunicationManager> handler)
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{
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assert(0);
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return AccessCheck::NoSuchDevice;
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}
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