3 * Copyright 2017 gRPC authors.
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.
19 #include <grpc/impl/codegen/port_platform.h>
21 #include "src/core/lib/channel/channelz.h"
23 #include <grpc/grpc.h>
24 #include <grpc/support/alloc.h>
25 #include <grpc/support/log.h>
26 #include <grpc/support/string_util.h>
31 #include "src/core/lib/channel/channelz_registry.h"
32 #include "src/core/lib/channel/status_util.h"
33 #include "src/core/lib/gpr/string.h"
34 #include "src/core/lib/gpr/useful.h"
35 #include "src/core/lib/gprpp/host_port.h"
36 #include "src/core/lib/gprpp/memory.h"
37 #include "src/core/lib/iomgr/error.h"
38 #include "src/core/lib/iomgr/exec_ctx.h"
39 #include "src/core/lib/slice/b64.h"
40 #include "src/core/lib/slice/slice_internal.h"
41 #include "src/core/lib/surface/channel.h"
42 #include "src/core/lib/surface/server.h"
43 #include "src/core/lib/transport/connectivity_state.h"
44 #include "src/core/lib/transport/error_utils.h"
45 #include "src/core/lib/uri/uri_parser.h"
56 void* parent_uuid_copy(void* p) { return p; }
57 void parent_uuid_destroy(void* p) {}
58 int parent_uuid_cmp(void* p1, void* p2) { return GPR_ICMP(p1, p2); }
59 const grpc_arg_pointer_vtable parent_uuid_vtable = {
60 parent_uuid_copy, parent_uuid_destroy, parent_uuid_cmp};
64 grpc_arg MakeParentUuidArg(intptr_t parent_uuid) {
65 // We would ideally like to store the uuid in an integer argument.
66 // Unfortunately, that won't work, because intptr_t (the type used for
67 // uuids) doesn't fit in an int (the type used for integer args).
68 // So instead, we use a hack to store it as a pointer, because
69 // intptr_t should be the same size as void*.
70 static_assert(sizeof(intptr_t) <= sizeof(void*),
71 "can't fit intptr_t inside of void*");
72 return grpc_channel_arg_pointer_create(
73 const_cast<char*>(GRPC_ARG_CHANNELZ_PARENT_UUID),
74 reinterpret_cast<void*>(parent_uuid), &parent_uuid_vtable);
77 intptr_t GetParentUuidFromArgs(const grpc_channel_args& args) {
79 grpc_channel_args_find(&args, GRPC_ARG_CHANNELZ_PARENT_UUID);
80 if (arg == nullptr || arg->type != GRPC_ARG_POINTER) return 0;
81 return reinterpret_cast<intptr_t>(arg->value.pointer.p);
88 BaseNode::BaseNode(EntityType type, UniquePtr<char> name)
89 : type_(type), uuid_(-1), name_(std::move(name)) {
90 // The registry will set uuid_ under its lock.
91 ChannelzRegistry::Register(this);
94 BaseNode::~BaseNode() { ChannelzRegistry::Unregister(uuid_); }
96 char* BaseNode::RenderJsonString() {
97 grpc_json* json = RenderJson();
98 GPR_ASSERT(json != nullptr);
99 char* json_str = grpc_json_dump_to_string(json, 0);
100 grpc_json_destroy(json);
105 // CallCountingHelper
108 CallCountingHelper::CallCountingHelper() {
109 num_cores_ = GPR_MAX(1, gpr_cpu_num_cores());
110 per_cpu_counter_data_storage_.reserve(num_cores_);
111 for (size_t i = 0; i < num_cores_; ++i) {
112 per_cpu_counter_data_storage_.emplace_back();
116 void CallCountingHelper::RecordCallStarted() {
117 AtomicCounterData& data =
118 per_cpu_counter_data_storage_[ExecCtx::Get()->starting_cpu()];
119 data.calls_started.FetchAdd(1, MemoryOrder::RELAXED);
120 data.last_call_started_cycle.Store(gpr_get_cycle_counter(),
121 MemoryOrder::RELAXED);
124 void CallCountingHelper::RecordCallFailed() {
125 per_cpu_counter_data_storage_[ExecCtx::Get()->starting_cpu()]
126 .calls_failed.FetchAdd(1, MemoryOrder::RELAXED);
129 void CallCountingHelper::RecordCallSucceeded() {
130 per_cpu_counter_data_storage_[ExecCtx::Get()->starting_cpu()]
131 .calls_succeeded.FetchAdd(1, MemoryOrder::RELAXED);
134 void CallCountingHelper::CollectData(CounterData* out) {
135 for (size_t core = 0; core < num_cores_; ++core) {
136 AtomicCounterData& data = per_cpu_counter_data_storage_[core];
138 out->calls_started += data.calls_started.Load(MemoryOrder::RELAXED);
139 out->calls_succeeded +=
140 per_cpu_counter_data_storage_[core].calls_succeeded.Load(
141 MemoryOrder::RELAXED);
142 out->calls_failed += per_cpu_counter_data_storage_[core].calls_failed.Load(
143 MemoryOrder::RELAXED);
144 const gpr_cycle_counter last_call =
145 per_cpu_counter_data_storage_[core].last_call_started_cycle.Load(
146 MemoryOrder::RELAXED);
147 if (last_call > out->last_call_started_cycle) {
148 out->last_call_started_cycle = last_call;
153 void CallCountingHelper::PopulateCallCounts(grpc_json* json) {
154 grpc_json* json_iterator = nullptr;
157 if (data.calls_started != 0) {
158 json_iterator = grpc_json_add_number_string_child(
159 json, json_iterator, "callsStarted", data.calls_started);
161 if (data.calls_succeeded != 0) {
162 json_iterator = grpc_json_add_number_string_child(
163 json, json_iterator, "callsSucceeded", data.calls_succeeded);
165 if (data.calls_failed) {
166 json_iterator = grpc_json_add_number_string_child(
167 json, json_iterator, "callsFailed", data.calls_failed);
169 if (data.calls_started != 0) {
170 gpr_timespec ts = gpr_convert_clock_type(
171 gpr_cycle_counter_to_time(data.last_call_started_cycle),
174 grpc_json_create_child(json_iterator, json, "lastCallStartedTimestamp",
175 gpr_format_timespec(ts), GRPC_JSON_STRING, true);
183 ChannelNode::ChannelNode(UniquePtr<char> target,
184 size_t channel_tracer_max_nodes, intptr_t parent_uuid)
185 : BaseNode(parent_uuid == 0 ? EntityType::kTopLevelChannel
186 : EntityType::kInternalChannel,
187 UniquePtr<char>(gpr_strdup(target.get()))),
188 target_(std::move(target)),
189 trace_(channel_tracer_max_nodes),
190 parent_uuid_(parent_uuid) {}
192 const char* ChannelNode::GetChannelConnectivityStateChangeString(
193 grpc_connectivity_state state) {
195 case GRPC_CHANNEL_IDLE:
196 return "Channel state change to IDLE";
197 case GRPC_CHANNEL_CONNECTING:
198 return "Channel state change to CONNECTING";
199 case GRPC_CHANNEL_READY:
200 return "Channel state change to READY";
201 case GRPC_CHANNEL_TRANSIENT_FAILURE:
202 return "Channel state change to TRANSIENT_FAILURE";
203 case GRPC_CHANNEL_SHUTDOWN:
204 return "Channel state change to SHUTDOWN";
206 GPR_UNREACHABLE_CODE(return "UNKNOWN");
209 grpc_json* ChannelNode::RenderJson() {
210 // We need to track these three json objects to build our object
211 grpc_json* top_level_json = grpc_json_create(GRPC_JSON_OBJECT);
212 grpc_json* json = top_level_json;
213 grpc_json* json_iterator = nullptr;
214 // create and fill the ref child
215 json_iterator = grpc_json_create_child(json_iterator, json, "ref", nullptr,
216 GRPC_JSON_OBJECT, false);
217 json = json_iterator;
218 json_iterator = nullptr;
219 json_iterator = grpc_json_add_number_string_child(json, json_iterator,
220 "channelId", uuid());
221 // reset json iterators to top level object
222 json = top_level_json;
223 json_iterator = nullptr;
224 // create and fill the data child.
225 grpc_json* data = grpc_json_create_child(json_iterator, json, "data", nullptr,
226 GRPC_JSON_OBJECT, false);
228 json_iterator = nullptr;
229 // connectivity state
230 // If low-order bit is on, then the field is set.
231 int state_field = connectivity_state_.Load(MemoryOrder::RELAXED);
232 if ((state_field & 1) != 0) {
233 grpc_connectivity_state state =
234 static_cast<grpc_connectivity_state>(state_field >> 1);
235 json = grpc_json_create_child(nullptr, json, "state", nullptr,
236 GRPC_JSON_OBJECT, false);
237 grpc_json_create_child(nullptr, json, "state",
238 grpc_connectivity_state_name(state),
239 GRPC_JSON_STRING, false);
242 // populate the target.
243 GPR_ASSERT(target_.get() != nullptr);
244 grpc_json_create_child(nullptr, json, "target", target_.get(),
245 GRPC_JSON_STRING, false);
246 // fill in the channel trace if applicable
247 grpc_json* trace_json = trace_.RenderJson();
248 if (trace_json != nullptr) {
249 trace_json->key = "trace"; // this object is named trace in channelz.proto
250 grpc_json_link_child(json, trace_json, nullptr);
252 // ask CallCountingHelper to populate trace and call count data.
253 call_counter_.PopulateCallCounts(json);
254 json = top_level_json;
255 // template method. Child classes may override this to add their specific
257 PopulateChildRefs(json);
258 return top_level_json;
261 void ChannelNode::PopulateChildRefs(grpc_json* json) {
262 MutexLock lock(&child_mu_);
263 grpc_json* json_iterator = nullptr;
264 if (!child_subchannels_.empty()) {
265 grpc_json* array_parent = grpc_json_create_child(
266 nullptr, json, "subchannelRef", nullptr, GRPC_JSON_ARRAY, false);
267 for (const auto& p : child_subchannels_) {
269 grpc_json_create_child(json_iterator, array_parent, nullptr, nullptr,
270 GRPC_JSON_OBJECT, false);
271 grpc_json_add_number_string_child(json_iterator, nullptr, "subchannelId",
275 if (!child_channels_.empty()) {
276 grpc_json* array_parent = grpc_json_create_child(
277 nullptr, json, "channelRef", nullptr, GRPC_JSON_ARRAY, false);
278 json_iterator = nullptr;
279 for (const auto& p : child_channels_) {
281 grpc_json_create_child(json_iterator, array_parent, nullptr, nullptr,
282 GRPC_JSON_OBJECT, false);
283 grpc_json_add_number_string_child(json_iterator, nullptr, "channelId",
289 void ChannelNode::SetConnectivityState(grpc_connectivity_state state) {
290 // Store with low-order bit set to indicate that the field is set.
291 int state_field = (state << 1) + 1;
292 connectivity_state_.Store(state_field, MemoryOrder::RELAXED);
295 void ChannelNode::AddChildChannel(intptr_t child_uuid) {
296 MutexLock lock(&child_mu_);
297 child_channels_.insert(MakePair(child_uuid, true));
300 void ChannelNode::RemoveChildChannel(intptr_t child_uuid) {
301 MutexLock lock(&child_mu_);
302 child_channels_.erase(child_uuid);
305 void ChannelNode::AddChildSubchannel(intptr_t child_uuid) {
306 MutexLock lock(&child_mu_);
307 child_subchannels_.insert(MakePair(child_uuid, true));
310 void ChannelNode::RemoveChildSubchannel(intptr_t child_uuid) {
311 MutexLock lock(&child_mu_);
312 child_subchannels_.erase(child_uuid);
319 ServerNode::ServerNode(grpc_server* server, size_t channel_tracer_max_nodes)
320 : BaseNode(EntityType::kServer, /* name */ nullptr),
321 trace_(channel_tracer_max_nodes) {}
323 ServerNode::~ServerNode() {}
325 void ServerNode::AddChildSocket(RefCountedPtr<SocketNode> node) {
326 MutexLock lock(&child_mu_);
327 child_sockets_.insert(MakePair(node->uuid(), std::move(node)));
330 void ServerNode::RemoveChildSocket(intptr_t child_uuid) {
331 MutexLock lock(&child_mu_);
332 child_sockets_.erase(child_uuid);
335 void ServerNode::AddChildListenSocket(RefCountedPtr<ListenSocketNode> node) {
336 MutexLock lock(&child_mu_);
337 child_listen_sockets_.insert(MakePair(node->uuid(), std::move(node)));
340 void ServerNode::RemoveChildListenSocket(intptr_t child_uuid) {
341 MutexLock lock(&child_mu_);
342 child_listen_sockets_.erase(child_uuid);
345 char* ServerNode::RenderServerSockets(intptr_t start_socket_id,
346 intptr_t max_results) {
347 // If user does not set max_results, we choose 500.
348 size_t pagination_limit = max_results == 0 ? 500 : max_results;
349 grpc_json* top_level_json = grpc_json_create(GRPC_JSON_OBJECT);
350 grpc_json* json = top_level_json;
351 grpc_json* json_iterator = nullptr;
352 MutexLock lock(&child_mu_);
353 size_t sockets_rendered = 0;
354 if (!child_sockets_.empty()) {
355 // Create list of socket refs
356 grpc_json* array_parent = grpc_json_create_child(
357 nullptr, json, "socketRef", nullptr, GRPC_JSON_ARRAY, false);
358 const size_t limit = GPR_MIN(child_sockets_.size(), pagination_limit);
359 for (auto it = child_sockets_.lower_bound(start_socket_id);
360 it != child_sockets_.end() && sockets_rendered < limit;
361 ++it, ++sockets_rendered) {
362 grpc_json* socket_ref_json = grpc_json_create_child(
363 nullptr, array_parent, nullptr, nullptr, GRPC_JSON_OBJECT, false);
364 json_iterator = grpc_json_add_number_string_child(
365 socket_ref_json, nullptr, "socketId", it->first);
366 grpc_json_create_child(json_iterator, socket_ref_json, "name",
367 it->second->name(), GRPC_JSON_STRING, false);
370 if (sockets_rendered == child_sockets_.size()) {
371 json_iterator = grpc_json_create_child(nullptr, json, "end", nullptr,
372 GRPC_JSON_TRUE, false);
374 char* json_str = grpc_json_dump_to_string(top_level_json, 0);
375 grpc_json_destroy(top_level_json);
379 grpc_json* ServerNode::RenderJson() {
380 // We need to track these three json objects to build our object
381 grpc_json* top_level_json = grpc_json_create(GRPC_JSON_OBJECT);
382 grpc_json* json = top_level_json;
383 grpc_json* json_iterator = nullptr;
384 // create and fill the ref child
385 json_iterator = grpc_json_create_child(json_iterator, json, "ref", nullptr,
386 GRPC_JSON_OBJECT, false);
387 json = json_iterator;
388 json_iterator = nullptr;
389 json_iterator = grpc_json_add_number_string_child(json, json_iterator,
391 // reset json iterators to top level object
392 json = top_level_json;
393 json_iterator = nullptr;
394 // create and fill the data child.
395 grpc_json* data = grpc_json_create_child(json_iterator, json, "data", nullptr,
396 GRPC_JSON_OBJECT, false);
398 json_iterator = nullptr;
399 // fill in the channel trace if applicable
400 grpc_json* trace_json = trace_.RenderJson();
401 if (trace_json != nullptr) {
402 trace_json->key = "trace"; // this object is named trace in channelz.proto
403 grpc_json_link_child(json, trace_json, nullptr);
405 // ask CallCountingHelper to populate trace and call count data.
406 call_counter_.PopulateCallCounts(json);
407 json = top_level_json;
408 // Render listen sockets
409 MutexLock lock(&child_mu_);
410 if (!child_listen_sockets_.empty()) {
411 grpc_json* array_parent = grpc_json_create_child(
412 nullptr, json, "listenSocket", nullptr, GRPC_JSON_ARRAY, false);
413 for (const auto& it : child_listen_sockets_) {
415 grpc_json_create_child(json_iterator, array_parent, nullptr, nullptr,
416 GRPC_JSON_OBJECT, false);
417 grpc_json* sibling_iterator = grpc_json_add_number_string_child(
418 json_iterator, nullptr, "socketId", it.first);
419 grpc_json_create_child(sibling_iterator, json_iterator, "name",
420 it.second->name(), GRPC_JSON_STRING, false);
423 return top_level_json;
432 void PopulateSocketAddressJson(grpc_json* json, const char* name,
433 const char* addr_str) {
434 if (addr_str == nullptr) return;
435 grpc_json* json_iterator = nullptr;
436 json_iterator = grpc_json_create_child(json_iterator, json, name, nullptr,
437 GRPC_JSON_OBJECT, false);
438 json = json_iterator;
439 json_iterator = nullptr;
440 grpc_uri* uri = grpc_uri_parse(addr_str, true);
441 if ((uri != nullptr) && ((strcmp(uri->scheme, "ipv4") == 0) ||
442 (strcmp(uri->scheme, "ipv6") == 0))) {
443 const char* host_port = uri->path;
444 if (*host_port == '/') ++host_port;
445 UniquePtr<char> host;
446 UniquePtr<char> port;
447 GPR_ASSERT(SplitHostPort(host_port, &host, &port));
449 if (port != nullptr) {
450 port_num = atoi(port.get());
453 grpc_base64_encode(host.get(), strlen(host.get()), false, false);
454 json_iterator = grpc_json_create_child(json_iterator, json, "tcpip_address",
455 nullptr, GRPC_JSON_OBJECT, false);
456 json = json_iterator;
457 json_iterator = nullptr;
458 json_iterator = grpc_json_add_number_string_child(json, json_iterator,
460 json_iterator = grpc_json_create_child(json_iterator, json, "ip_address",
461 b64_host, GRPC_JSON_STRING, true);
462 } else if (uri != nullptr && strcmp(uri->scheme, "unix") == 0) {
463 json_iterator = grpc_json_create_child(json_iterator, json, "uds_address",
464 nullptr, GRPC_JSON_OBJECT, false);
465 json = json_iterator;
466 json_iterator = nullptr;
468 grpc_json_create_child(json_iterator, json, "filename",
469 gpr_strdup(uri->path), GRPC_JSON_STRING, true);
471 json_iterator = grpc_json_create_child(json_iterator, json, "other_address",
472 nullptr, GRPC_JSON_OBJECT, false);
473 json = json_iterator;
474 json_iterator = nullptr;
475 json_iterator = grpc_json_create_child(json_iterator, json, "name",
476 addr_str, GRPC_JSON_STRING, false);
478 grpc_uri_destroy(uri);
483 SocketNode::SocketNode(UniquePtr<char> local, UniquePtr<char> remote,
484 UniquePtr<char> name)
485 : BaseNode(EntityType::kSocket, std::move(name)),
486 local_(std::move(local)),
487 remote_(std::move(remote)) {}
489 void SocketNode::RecordStreamStartedFromLocal() {
490 gpr_atm_no_barrier_fetch_add(&streams_started_, static_cast<gpr_atm>(1));
491 gpr_atm_no_barrier_store(&last_local_stream_created_cycle_,
492 gpr_get_cycle_counter());
495 void SocketNode::RecordStreamStartedFromRemote() {
496 gpr_atm_no_barrier_fetch_add(&streams_started_, static_cast<gpr_atm>(1));
497 gpr_atm_no_barrier_store(&last_remote_stream_created_cycle_,
498 gpr_get_cycle_counter());
501 void SocketNode::RecordMessagesSent(uint32_t num_sent) {
502 gpr_atm_no_barrier_fetch_add(&messages_sent_, static_cast<gpr_atm>(num_sent));
503 gpr_atm_no_barrier_store(&last_message_sent_cycle_, gpr_get_cycle_counter());
506 void SocketNode::RecordMessageReceived() {
507 gpr_atm_no_barrier_fetch_add(&messages_received_, static_cast<gpr_atm>(1));
508 gpr_atm_no_barrier_store(&last_message_received_cycle_,
509 gpr_get_cycle_counter());
512 grpc_json* SocketNode::RenderJson() {
513 // We need to track these three json objects to build our object
514 grpc_json* top_level_json = grpc_json_create(GRPC_JSON_OBJECT);
515 grpc_json* json = top_level_json;
516 grpc_json* json_iterator = nullptr;
517 // create and fill the ref child
518 json_iterator = grpc_json_create_child(json_iterator, json, "ref", nullptr,
519 GRPC_JSON_OBJECT, false);
520 json = json_iterator;
521 json_iterator = nullptr;
522 json_iterator = grpc_json_add_number_string_child(json, json_iterator,
524 json_iterator = grpc_json_create_child(json_iterator, json, "name", name(),
525 GRPC_JSON_STRING, false);
526 json = top_level_json;
527 PopulateSocketAddressJson(json, "remote", remote_.get());
528 PopulateSocketAddressJson(json, "local", local_.get());
529 // reset json iterators to top level object
530 json = top_level_json;
531 json_iterator = nullptr;
532 // create and fill the data child.
533 grpc_json* data = grpc_json_create_child(json_iterator, json, "data", nullptr,
534 GRPC_JSON_OBJECT, false);
536 json_iterator = nullptr;
538 gpr_atm streams_started = gpr_atm_no_barrier_load(&streams_started_);
539 if (streams_started != 0) {
540 json_iterator = grpc_json_add_number_string_child(
541 json, json_iterator, "streamsStarted", streams_started);
542 gpr_cycle_counter last_local_stream_created_cycle =
543 gpr_atm_no_barrier_load(&last_local_stream_created_cycle_);
544 if (last_local_stream_created_cycle != 0) {
545 ts = gpr_convert_clock_type(
546 gpr_cycle_counter_to_time(last_local_stream_created_cycle),
548 json_iterator = grpc_json_create_child(
549 json_iterator, json, "lastLocalStreamCreatedTimestamp",
550 gpr_format_timespec(ts), GRPC_JSON_STRING, true);
552 gpr_cycle_counter last_remote_stream_created_cycle =
553 gpr_atm_no_barrier_load(&last_remote_stream_created_cycle_);
554 if (last_remote_stream_created_cycle != 0) {
555 ts = gpr_convert_clock_type(
556 gpr_cycle_counter_to_time(last_remote_stream_created_cycle),
558 json_iterator = grpc_json_create_child(
559 json_iterator, json, "lastRemoteStreamCreatedTimestamp",
560 gpr_format_timespec(ts), GRPC_JSON_STRING, true);
563 gpr_atm streams_succeeded = gpr_atm_no_barrier_load(&streams_succeeded_);
564 if (streams_succeeded != 0) {
565 json_iterator = grpc_json_add_number_string_child(
566 json, json_iterator, "streamsSucceeded", streams_succeeded);
568 gpr_atm streams_failed = gpr_atm_no_barrier_load(&streams_failed_);
569 if (streams_failed) {
570 json_iterator = grpc_json_add_number_string_child(
571 json, json_iterator, "streamsFailed", streams_failed);
573 gpr_atm messages_sent = gpr_atm_no_barrier_load(&messages_sent_);
574 if (messages_sent != 0) {
575 json_iterator = grpc_json_add_number_string_child(
576 json, json_iterator, "messagesSent", messages_sent);
577 ts = gpr_convert_clock_type(
578 gpr_cycle_counter_to_time(
579 gpr_atm_no_barrier_load(&last_message_sent_cycle_)),
582 grpc_json_create_child(json_iterator, json, "lastMessageSentTimestamp",
583 gpr_format_timespec(ts), GRPC_JSON_STRING, true);
585 gpr_atm messages_received = gpr_atm_no_barrier_load(&messages_received_);
586 if (messages_received != 0) {
587 json_iterator = grpc_json_add_number_string_child(
588 json, json_iterator, "messagesReceived", messages_received);
589 ts = gpr_convert_clock_type(
590 gpr_cycle_counter_to_time(
591 gpr_atm_no_barrier_load(&last_message_received_cycle_)),
593 json_iterator = grpc_json_create_child(
594 json_iterator, json, "lastMessageReceivedTimestamp",
595 gpr_format_timespec(ts), GRPC_JSON_STRING, true);
597 gpr_atm keepalives_sent = gpr_atm_no_barrier_load(&keepalives_sent_);
598 if (keepalives_sent != 0) {
599 json_iterator = grpc_json_add_number_string_child(
600 json, json_iterator, "keepAlivesSent", keepalives_sent);
602 return top_level_json;
609 ListenSocketNode::ListenSocketNode(UniquePtr<char> local_addr,
610 UniquePtr<char> name)
611 : BaseNode(EntityType::kSocket, std::move(name)),
612 local_addr_(std::move(local_addr)) {}
614 grpc_json* ListenSocketNode::RenderJson() {
615 // We need to track these three json objects to build our object
616 grpc_json* top_level_json = grpc_json_create(GRPC_JSON_OBJECT);
617 grpc_json* json = top_level_json;
618 grpc_json* json_iterator = nullptr;
619 // create and fill the ref child
620 json_iterator = grpc_json_create_child(json_iterator, json, "ref", nullptr,
621 GRPC_JSON_OBJECT, false);
622 json = json_iterator;
623 json_iterator = nullptr;
624 json_iterator = grpc_json_add_number_string_child(json, json_iterator,
626 json_iterator = grpc_json_create_child(json_iterator, json, "name", name(),
627 GRPC_JSON_STRING, false);
628 json = top_level_json;
629 PopulateSocketAddressJson(json, "local", local_addr_.get());
631 return top_level_json;
634 } // namespace channelz
635 } // namespace grpc_core