1 #include "dbus_to_event_handler.hpp"
2 
3 #include "libpldmresponder/pdr.hpp"
4 
5 #include <libpldm/pldm.h>
6 
7 #include <phosphor-logging/lg2.hpp>
8 
9 PHOSPHOR_LOG2_USING;
10 
11 namespace pldm
12 {
13 using namespace pldm::responder;
14 using namespace pldm::responder::pdr;
15 using namespace pldm::responder::pdr_utils;
16 using namespace pldm::utils;
17 using namespace sdbusplus::bus::match::rules;
18 
19 namespace state_sensor
20 {
21 const std::vector<uint8_t> pdrTypes{PLDM_STATE_SENSOR_PDR};
22 
23 DbusToPLDMEvent::DbusToPLDMEvent(
24     int mctp_fd, uint8_t mctp_eid, pldm::InstanceIdDb& instanceIdDb,
25     pldm::requester::Handler<pldm::requester::Request>* handler) :
26     mctp_fd(mctp_fd),
27     mctp_eid(mctp_eid), instanceIdDb(instanceIdDb), handler(handler)
28 {}
29 
30 void DbusToPLDMEvent::sendEventMsg(uint8_t eventType,
31                                    const std::vector<uint8_t>& eventDataVec)
32 {
33     auto instanceId = instanceIdDb.next(mctp_eid);
34     std::vector<uint8_t> requestMsg(sizeof(pldm_msg_hdr) +
35                                     PLDM_PLATFORM_EVENT_MESSAGE_MIN_REQ_BYTES +
36                                     eventDataVec.size());
37     auto request = reinterpret_cast<pldm_msg*>(requestMsg.data());
38 
39     auto rc = encode_platform_event_message_req(
40         instanceId, 1 /*formatVersion*/, TERMINUS_ID /*tId*/, eventType,
41         eventDataVec.data(), eventDataVec.size(), request,
42         eventDataVec.size() + PLDM_PLATFORM_EVENT_MESSAGE_MIN_REQ_BYTES);
43     if (rc != PLDM_SUCCESS)
44     {
45         instanceIdDb.free(mctp_eid, instanceId);
46         error("Failed to encode_platform_event_message_req, rc = {RC}", "RC",
47               rc);
48         return;
49     }
50 
51     auto platformEventMessageResponseHandler =
52         [](mctp_eid_t /*eid*/, const pldm_msg* response, size_t respMsgLen) {
53         if (response == nullptr || !respMsgLen)
54         {
55             error("Failed to receive response for platform event message");
56             return;
57         }
58         uint8_t completionCode{};
59         uint8_t status{};
60         auto rc = decode_platform_event_message_resp(response, respMsgLen,
61                                                      &completionCode, &status);
62         if (rc || completionCode)
63         {
64             error(
65                 "Failed to decode_platform_event_message_resp: rc = {RC}, cc = {CC}",
66                 "RC", rc, "CC", static_cast<unsigned>(completionCode));
67         }
68     };
69 
70     rc = handler->registerRequest(
71         mctp_eid, instanceId, PLDM_PLATFORM, PLDM_PLATFORM_EVENT_MESSAGE,
72         std::move(requestMsg), std::move(platformEventMessageResponseHandler));
73     if (rc)
74     {
75         error("Failed to send the platform event message");
76     }
77 }
78 
79 void DbusToPLDMEvent::sendStateSensorEvent(SensorId sensorId,
80                                            const DbusObjMaps& dbusMaps)
81 {
82     // Encode PLDM platform event msg to indicate a state sensor change.
83     // DSP0248_1.2.0 Table 19
84     if (!dbusMaps.contains(sensorId))
85     {
86         // this is not an error condition, if we end up here
87         // that means that the sensor with the sensor id has
88         // custom behaviour(or probably an oem sensor) in
89         // sending events that cannot be captured via standard
90         // dbus-json infastructure
91         return;
92     }
93 
94     size_t sensorEventSize = PLDM_SENSOR_EVENT_DATA_MIN_LENGTH + 1;
95     const auto& [dbusMappings, dbusValMaps] = dbusMaps.at(sensorId);
96     for (uint8_t offset = 0; offset < dbusMappings.size(); ++offset)
97     {
98         std::vector<uint8_t> sensorEventDataVec{};
99         sensorEventDataVec.resize(sensorEventSize);
100         auto eventData = reinterpret_cast<struct pldm_sensor_event_data*>(
101             sensorEventDataVec.data());
102         eventData->sensor_id = sensorId;
103         eventData->sensor_event_class_type = PLDM_STATE_SENSOR_STATE;
104         eventData->event_class[0] = offset;
105         eventData->event_class[1] = PLDM_SENSOR_UNKNOWN;
106         eventData->event_class[2] = PLDM_SENSOR_UNKNOWN;
107 
108         const auto& dbusMapping = dbusMappings[offset];
109         const auto& dbusValueMapping = dbusValMaps[offset];
110         auto stateSensorMatch = std::make_unique<sdbusplus::bus::match_t>(
111             pldm::utils::DBusHandler::getBus(),
112             propertiesChanged(dbusMapping.objectPath.c_str(),
113                               dbusMapping.interface.c_str()),
114             [this, sensorEventDataVec, dbusValueMapping,
115              dbusMapping](auto& msg) mutable {
116             DbusChangedProps props{};
117             std::string intf;
118             msg.read(intf, props);
119             if (!props.contains(dbusMapping.propertyName))
120             {
121                 return;
122             }
123             for (const auto& itr : dbusValueMapping)
124             {
125                 bool findValue = false;
126                 if (dbusMapping.propertyType == "string")
127                 {
128                     std::string src = std::get<std::string>(itr.second);
129                     std::string dst = std::get<std::string>(
130                         props.at(dbusMapping.propertyName));
131 
132                     auto values = pldm::utils::split(src, "||", " ");
133                     for (auto& value : values)
134                     {
135                         if (value == dst)
136                         {
137                             findValue = true;
138                             break;
139                         }
140                     }
141                 }
142                 else
143                 {
144                     findValue = itr.second == props.at(dbusMapping.propertyName)
145                                     ? true
146                                     : false;
147                 }
148 
149                 if (findValue)
150                 {
151                     auto eventData =
152                         reinterpret_cast<struct pldm_sensor_event_data*>(
153                             sensorEventDataVec.data());
154                     eventData->event_class[1] = itr.first;
155                     eventData->event_class[2] = itr.first;
156                     this->sendEventMsg(PLDM_SENSOR_EVENT, sensorEventDataVec);
157                     break;
158                 }
159             }
160             });
161         stateSensorMatchs.emplace_back(std::move(stateSensorMatch));
162     }
163 }
164 
165 void DbusToPLDMEvent::listenSensorEvent(const pdr_utils::Repo& repo,
166                                         const DbusObjMaps& dbusMaps)
167 {
168     const std::map<Type, sensorEvent> sensorHandlers = {
169         {PLDM_STATE_SENSOR_PDR,
170          [this](SensorId sensorId, const DbusObjMaps& dbusMaps) {
171         this->sendStateSensorEvent(sensorId, dbusMaps);
172          }}};
173 
174     pldm_state_sensor_pdr* pdr = nullptr;
175     std::unique_ptr<pldm_pdr, decltype(&pldm_pdr_destroy)> sensorPdrRepo(
176         pldm_pdr_init(), pldm_pdr_destroy);
177     if (!sensorPdrRepo)
178     {
179         throw std::runtime_error("Unable to instantiate sensor PDR repository");
180     }
181 
182     for (auto pdrType : pdrTypes)
183     {
184         Repo sensorPDRs(sensorPdrRepo.get());
185         getRepoByType(repo, sensorPDRs, pdrType);
186         if (sensorPDRs.empty())
187         {
188             return;
189         }
190 
191         PdrEntry pdrEntry{};
192         auto pdrRecord = sensorPDRs.getFirstRecord(pdrEntry);
193         while (pdrRecord)
194         {
195             pdr = reinterpret_cast<pldm_state_sensor_pdr*>(pdrEntry.data);
196             SensorId sensorId = LE16TOH(pdr->sensor_id);
197             if (sensorHandlers.contains(pdrType))
198             {
199                 sensorHandlers.at(pdrType)(sensorId, dbusMaps);
200             }
201 
202             pdrRecord = sensorPDRs.getNextRecord(pdrRecord, pdrEntry);
203         }
204     }
205 }
206 
207 } // namespace state_sensor
208 } // namespace pldm
209