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 mctp_fd,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_fd(mctp_fd),
25 mctp_eid(mctp_eid), instanceIdDb(instanceIdDb), handler(handler)
26 {}
27
sendEventMsg(uint8_t eventType,const std::vector<uint8_t> & eventDataVec)28 void DbusToPLDMEvent::sendEventMsg(uint8_t eventType,
29 const std::vector<uint8_t>& eventDataVec)
30 {
31 auto instanceId = instanceIdDb.next(mctp_eid);
32 std::vector<uint8_t> requestMsg(sizeof(pldm_msg_hdr) +
33 PLDM_PLATFORM_EVENT_MESSAGE_MIN_REQ_BYTES +
34 eventDataVec.size());
35 auto request = reinterpret_cast<pldm_msg*>(requestMsg.data());
36
37 auto rc = encode_platform_event_message_req(
38 instanceId, 1 /*formatVersion*/, TERMINUS_ID /*tId*/, eventType,
39 eventDataVec.data(), eventDataVec.size(), request,
40 eventDataVec.size() + PLDM_PLATFORM_EVENT_MESSAGE_MIN_REQ_BYTES);
41 if (rc != PLDM_SUCCESS)
42 {
43 instanceIdDb.free(mctp_eid, instanceId);
44 error(
45 "Failed to encode platform event message request, response code '{RC}'",
46 "RC", rc);
47 return;
48 }
49
50 auto platformEventMessageResponseHandler =
51 [](mctp_eid_t /*eid*/, const pldm_msg* response, 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 (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, dbusMapping, sensorId,
115 offset](auto& msg) mutable {
116 DbusChangedProps props{};
117 std::string intf;
118 uint8_t previousState = PLDM_SENSOR_UNKNOWN;
119 msg.read(intf, props);
120 if (!props.contains(dbusMapping.propertyName))
121 {
122 return;
123 }
124 for (const auto& itr : dbusValueMapping)
125 {
126 bool findValue = false;
127 if (dbusMapping.propertyType == "string")
128 {
129 std::string src = std::get<std::string>(itr.second);
130 std::string dst = std::get<std::string>(
131 props.at(dbusMapping.propertyName));
132
133 auto values = pldm::utils::split(src, "||", " ");
134 for (const auto& value : values)
135 {
136 if (value == dst)
137 {
138 findValue = true;
139 break;
140 }
141 }
142 }
143 else
144 {
145 findValue = itr.second == props.at(dbusMapping.propertyName)
146 ? true
147 : false;
148 }
149
150 if (findValue)
151 {
152 auto eventData =
153 reinterpret_cast<struct pldm_sensor_event_data*>(
154 sensorEventDataVec.data());
155 eventData->event_class[1] = itr.first;
156 if (sensorCacheMap.contains(sensorId) &&
157 sensorCacheMap[sensorId][offset] != 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, sensorEventDataVec);
167 updateSensorCacheMaps(sensorId, offset, previousState);
168 break;
169 }
170 }
171 });
172 stateSensorMatchs.emplace_back(std::move(stateSensorMatch));
173 }
174 }
175
listenSensorEvent(const pdr_utils::Repo & repo,const DbusObjMaps & dbusMaps)176 void DbusToPLDMEvent::listenSensorEvent(const pdr_utils::Repo& repo,
177 const DbusObjMaps& dbusMaps)
178 {
179 const std::map<Type, sensorEvent> sensorHandlers = {
180 {PLDM_STATE_SENSOR_PDR,
181 [this](SensorId sensorId, const DbusObjMaps& dbusMaps) {
182 this->sendStateSensorEvent(sensorId, dbusMaps);
183 }}};
184
185 pldm_state_sensor_pdr* pdr = nullptr;
186 std::unique_ptr<pldm_pdr, decltype(&pldm_pdr_destroy)> sensorPdrRepo(
187 pldm_pdr_init(), pldm_pdr_destroy);
188 if (!sensorPdrRepo)
189 {
190 throw std::runtime_error("Unable to instantiate sensor PDR repository");
191 }
192
193 for (auto pdrType : pdrTypes)
194 {
195 Repo sensorPDRs(sensorPdrRepo.get());
196 getRepoByType(repo, sensorPDRs, pdrType);
197 if (sensorPDRs.empty())
198 {
199 return;
200 }
201
202 PdrEntry pdrEntry{};
203 auto pdrRecord = sensorPDRs.getFirstRecord(pdrEntry);
204 while (pdrRecord)
205 {
206 pdr = reinterpret_cast<pldm_state_sensor_pdr*>(pdrEntry.data);
207 SensorId sensorId = LE16TOH(pdr->sensor_id);
208 if (sensorHandlers.contains(pdrType))
209 {
210 sensorHandlers.at(pdrType)(sensorId, dbusMaps);
211 }
212
213 pdrRecord = sensorPDRs.getNextRecord(pdrRecord, pdrEntry);
214 }
215 }
216 }
217
218 } // namespace state_sensor
219 } // namespace pldm
220