1 #include "dbus_to_event_handler.hpp"
2
3 #include "libpldmresponder/pdr.hpp"
4
5 #include <phosphor-logging/lg2.hpp>
6
7 PHOSPHOR_LOG2_USING;
8
9 namespace pldm
10 {
11 using namespace pldm::responder;
12 using namespace pldm::responder::pdr;
13 using namespace pldm::responder::pdr_utils;
14 using namespace pldm::utils;
15 using namespace sdbusplus::bus::match::rules;
16
17 namespace state_sensor
18 {
19 const std::vector<uint8_t> pdrTypes{PLDM_STATE_SENSOR_PDR};
20
DbusToPLDMEvent(int,uint8_t mctp_eid,pldm::InstanceIdDb & instanceIdDb,pldm::requester::Handler<pldm::requester::Request> * handler)21 DbusToPLDMEvent::DbusToPLDMEvent(
22 int /* mctp_fd */, uint8_t mctp_eid, pldm::InstanceIdDb& instanceIdDb,
23 pldm::requester::Handler<pldm::requester::Request>* handler) :
24 mctp_eid(mctp_eid), instanceIdDb(instanceIdDb), handler(handler)
25 {}
26
sendEventMsg(uint8_t eventType,const std::vector<uint8_t> & eventDataVec)27 void DbusToPLDMEvent::sendEventMsg(uint8_t eventType,
28 const std::vector<uint8_t>& eventDataVec)
29 {
30 auto instanceId = instanceIdDb.next(mctp_eid);
31 std::vector<uint8_t> requestMsg(
32 sizeof(pldm_msg_hdr) + PLDM_PLATFORM_EVENT_MESSAGE_MIN_REQ_BYTES +
33 eventDataVec.size());
34 auto request = new (requestMsg.data()) pldm_msg;
35
36 auto rc = encode_platform_event_message_req(
37 instanceId, 1 /*formatVersion*/, TERMINUS_ID /*tId*/, eventType,
38 eventDataVec.data(), eventDataVec.size(), request,
39 eventDataVec.size() + PLDM_PLATFORM_EVENT_MESSAGE_MIN_REQ_BYTES);
40 if (rc != PLDM_SUCCESS)
41 {
42 instanceIdDb.free(mctp_eid, instanceId);
43 error(
44 "Failed to encode platform event message request, response code '{RC}'",
45 "RC", rc);
46 return;
47 }
48
49 auto platformEventMessageResponseHandler = [](mctp_eid_t /*eid*/,
50 const pldm_msg* response,
51 size_t respMsgLen) {
52 if (response == nullptr || !respMsgLen)
53 {
54 error("Failed to receive response for platform event message");
55 return;
56 }
57 uint8_t completionCode{};
58 uint8_t status{};
59 auto rc = decode_platform_event_message_resp(response, respMsgLen,
60 &completionCode, &status);
61 if (rc || completionCode)
62 {
63 error(
64 "Failed to decode response of platform event message, response code '{RC}' and completion code '{CC}'",
65 "RC", rc, "CC", completionCode);
66 }
67 };
68
69 rc = handler->registerRequest(
70 mctp_eid, instanceId, PLDM_PLATFORM, PLDM_PLATFORM_EVENT_MESSAGE,
71 std::move(requestMsg), std::move(platformEventMessageResponseHandler));
72 if (rc)
73 {
74 error("Failed to send the platform event message, response code '{RC}'",
75 "RC", rc);
76 }
77 }
78
sendStateSensorEvent(SensorId sensorId,const DbusObjMaps & dbusMaps)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 (size_t offset = 0; offset < dbusMappings.size(); ++offset)
97 {
98 std::vector<uint8_t> sensorEventDataVec{};
99 sensorEventDataVec.resize(sensorEventSize);
100 auto eventData = new (sensorEventDataVec.data()) pldm_sensor_event_data;
101 eventData->sensor_id = sensorId;
102 eventData->sensor_event_class_type = PLDM_STATE_SENSOR_STATE;
103 eventData->event_class[0] = static_cast<uint8_t>(offset);
104 eventData->event_class[1] = PLDM_SENSOR_UNKNOWN;
105 eventData->event_class[2] = PLDM_SENSOR_UNKNOWN;
106
107 const auto& dbusMapping = dbusMappings[offset];
108 const auto& dbusValueMapping = dbusValMaps[offset];
109 auto stateSensorMatch = std::make_unique<sdbusplus::bus::match_t>(
110 pldm::utils::DBusHandler::getBus(),
111 propertiesChanged(dbusMapping.objectPath.c_str(),
112 dbusMapping.interface.c_str()),
113 [this, sensorEventDataVec, dbusValueMapping, dbusMapping, sensorId,
114 offset](auto& msg) mutable {
115 DbusChangedProps props{};
116 std::string intf;
117 uint8_t previousState = PLDM_SENSOR_UNKNOWN;
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 (const auto& value : values)
134 {
135 if (value == dst)
136 {
137 findValue = true;
138 break;
139 }
140 }
141 }
142 else
143 {
144 findValue =
145 itr.second == props.at(dbusMapping.propertyName)
146 ? true
147 : false;
148 }
149
150 if (findValue)
151 {
152 auto eventData = new (sensorEventDataVec.data())
153 pldm_sensor_event_data;
154 eventData->event_class[1] = itr.first;
155 if (sensorCacheMap.contains(sensorId) &&
156 sensorCacheMap[sensorId][offset] !=
157 PLDM_SENSOR_UNKNOWN)
158 {
159 previousState = sensorCacheMap[sensorId][offset];
160 }
161 else
162 {
163 previousState = itr.first;
164 }
165 eventData->event_class[2] = previousState;
166 this->sendEventMsg(PLDM_SENSOR_EVENT,
167 sensorEventDataVec);
168 updateSensorCacheMaps(sensorId, offset, previousState);
169 break;
170 }
171 }
172 });
173 stateSensorMatchs.emplace_back(std::move(stateSensorMatch));
174 }
175 }
176
listenSensorEvent(const pdr_utils::Repo & repo,const DbusObjMaps & dbusMaps)177 void DbusToPLDMEvent::listenSensorEvent(const pdr_utils::Repo& repo,
178 const DbusObjMaps& dbusMaps)
179 {
180 const std::map<Type, sensorEvent> sensorHandlers = {
181 {PLDM_STATE_SENSOR_PDR,
182 [this](SensorId sensorId, const DbusObjMaps& dbusMaps) {
183 this->sendStateSensorEvent(sensorId, dbusMaps);
184 }}};
185
186 pldm_state_sensor_pdr* pdr = nullptr;
187 std::unique_ptr<pldm_pdr, decltype(&pldm_pdr_destroy)> sensorPdrRepo(
188 pldm_pdr_init(), pldm_pdr_destroy);
189 if (!sensorPdrRepo)
190 {
191 throw std::runtime_error("Unable to instantiate sensor PDR repository");
192 }
193
194 for (auto pdrType : pdrTypes)
195 {
196 Repo sensorPDRs(sensorPdrRepo.get());
197 getRepoByType(repo, sensorPDRs, pdrType);
198 if (sensorPDRs.empty())
199 {
200 return;
201 }
202
203 PdrEntry pdrEntry{};
204 auto pdrRecord = sensorPDRs.getFirstRecord(pdrEntry);
205 while (pdrRecord)
206 {
207 pdr = new (pdrEntry.data) pldm_state_sensor_pdr;
208 SensorId sensorId = LE16TOH(pdr->sensor_id);
209 if (sensorHandlers.contains(pdrType))
210 {
211 sensorHandlers.at(pdrType)(sensorId, dbusMaps);
212 }
213
214 pdrRecord = sensorPDRs.getNextRecord(pdrRecord, pdrEntry);
215 }
216 }
217 }
218
219 } // namespace state_sensor
220 } // namespace pldm
221