test/core/end2end/tests/bad_ping.cc - platform/external/grpc-grpc - Git at Google

 /*
  *
  * Copyright 2017 gRPC authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  */

 #include "test/core/end2end/end2end_tests.h"

 #include <string.h>

 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>

 #include "src/core/lib/gpr/useful.h"
 #include "test/core/end2end/cq_verifier.h"

 #define MAX_PING_STRIKES 2

 static void* tag(intptr_t t) { return (void*)t; }

 static void drain_cq(grpc_completion_queue* cq) {
   grpc_event ev;
   do {
     ev = grpc_completion_queue_next(cq, grpc_timeout_seconds_to_deadline(5),
                                     nullptr);
   } while (ev.type != GRPC_QUEUE_SHUTDOWN);
 }

 static void shutdown_server(grpc_end2end_test_fixture* f) {
   if (!f->server) return;
   grpc_server_destroy(f->server);
   f->server = nullptr;
 }

 static void shutdown_client(grpc_end2end_test_fixture* f) {
   if (!f->client) return;
   grpc_channel_destroy(f->client);
   f->client = nullptr;
 }

 static void end_test(grpc_end2end_test_fixture* f) {
   shutdown_server(f);
   shutdown_client(f);

   grpc_completion_queue_shutdown(f->cq);
   drain_cq(f->cq);
   grpc_completion_queue_destroy(f->cq);
   grpc_completion_queue_destroy(f->shutdown_cq);
 }

 // Send more pings than server allows to trigger server's GOAWAY.
 static void test_bad_ping(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f = config.create_fixture(nullptr, nullptr);
   cq_verifier* cqv = cq_verifier_create(f.cq);
   grpc_arg client_a[3];
   client_a[0].type = GRPC_ARG_INTEGER;
   client_a[0].key =
       const_cast<char*>(GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS);
   client_a[0].value.integer = 10;
   client_a[1].type = GRPC_ARG_INTEGER;
   client_a[1].key = const_cast<char*>(GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA);
   client_a[1].value.integer = 0;
   client_a[2].type = GRPC_ARG_INTEGER;
   client_a[2].key = const_cast<char*>(GRPC_ARG_HTTP2_BDP_PROBE);
   client_a[2].value.integer = 0;
   grpc_arg server_a[3];
   server_a[0].type = GRPC_ARG_INTEGER;
   server_a[0].key =
       const_cast<char*>(GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS);
   server_a[0].value.integer = 300000 /* 5 minutes */;
   server_a[1].type = GRPC_ARG_INTEGER;
   server_a[1].key = const_cast<char*>(GRPC_ARG_HTTP2_MAX_PING_STRIKES);
   server_a[1].value.integer = MAX_PING_STRIKES;
   server_a[2].type = GRPC_ARG_INTEGER;
   server_a[2].key = const_cast<char*>(GRPC_ARG_HTTP2_BDP_PROBE);
   server_a[2].value.integer = 0;
   grpc_channel_args client_args = {GPR_ARRAY_SIZE(client_a), client_a};
   grpc_channel_args server_args = {GPR_ARRAY_SIZE(server_a), server_a};

   config.init_client(&f, &client_args);
   config.init_server(&f, &server_args);

   grpc_call* c;
   grpc_call* s;
   gpr_timespec deadline = grpc_timeout_seconds_to_deadline(10);
   grpc_op ops[6];
   grpc_op* op;
   grpc_metadata_array initial_metadata_recv;
   grpc_metadata_array trailing_metadata_recv;
   grpc_metadata_array request_metadata_recv;
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
   grpc_slice details;
   int was_cancelled = 2;

   c = grpc_channel_create_call(f.client, nullptr, GRPC_PROPAGATE_DEFAULTS, f.cq,
                                grpc_slice_from_static_string("/foo"), nullptr,
                                deadline, nullptr);
   GPR_ASSERT(c);

   grpc_metadata_array_init(&initial_metadata_recv);
   grpc_metadata_array_init(&trailing_metadata_recv);
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);

   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op->data.send_initial_metadata.metadata = nullptr;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
   op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);

   error =
       grpc_server_request_call(f.server, &s, &call_details,
                                &request_metadata_recv, f.cq, f.cq, tag(101));
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
   cq_verify(cqv);

   // Send too many pings to the server to trigger the punishment:
   // The first ping will let server mark its last_recv time. Afterwards, each
   // ping will trigger a ping strike, and we need at least MAX_PING_STRIKES
   // strikes to trigger the punishment. So (MAX_PING_STRIKES + 2) pings are
   // needed here.
   int i;
   for (i = 1; i <= MAX_PING_STRIKES + 2; i++) {
     grpc_channel_ping(f.client, f.cq, tag(200 + i), nullptr);
     CQ_EXPECT_COMPLETION(cqv, tag(200 + i), 1);
     if (i == MAX_PING_STRIKES + 2) {
       CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
     }
     cq_verify(cqv);
   }

   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
   grpc_slice status_details = grpc_slice_from_static_string("xyz");
   op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);

   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
   cq_verify(cqv);

   grpc_server_shutdown_and_notify(f.server, f.cq, tag(0xdead));
   CQ_EXPECT_COMPLETION(cqv, tag(0xdead), 1);
   cq_verify(cqv);

   grpc_call_unref(s);

   // The connection should be closed immediately after the misbehaved pings,
   // the in-progress RPC should fail.
   GPR_ASSERT(status == GRPC_STATUS_UNAVAILABLE);
   GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
   GPR_ASSERT(was_cancelled == 1);

   grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
   grpc_call_details_destroy(&call_details);
   grpc_call_unref(c);
   cq_verifier_destroy(cqv);
   end_test(&f);
   config.tear_down_data(&f);
 }

 // Try sending more pings than server allows, but server should be fine because
 // max_pings_without_data should limit pings sent out on wire.
 static void test_pings_without_data(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f = config.create_fixture(nullptr, nullptr);
   cq_verifier* cqv = cq_verifier_create(f.cq);
   grpc_arg client_a[3];
   client_a[0].type = GRPC_ARG_INTEGER;
   client_a[0].key =
       const_cast<char*>(GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS);
   client_a[0].value.integer = 10;
   // Only allow MAX_PING_STRIKES pings without data (DATA/HEADERS/WINDOW_UPDATE)
   // so that the transport will throttle the excess pings.
   client_a[1].type = GRPC_ARG_INTEGER;
   client_a[1].key = const_cast<char*>(GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA);
   client_a[1].value.integer = MAX_PING_STRIKES;
   client_a[2].type = GRPC_ARG_INTEGER;
   client_a[2].key = const_cast<char*>(GRPC_ARG_HTTP2_BDP_PROBE);
   client_a[2].value.integer = 0;
   grpc_arg server_a[3];
   server_a[0].type = GRPC_ARG_INTEGER;
   server_a[0].key =
       const_cast<char*>(GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS);
   server_a[0].value.integer = 300000 /* 5 minutes */;
   server_a[1].type = GRPC_ARG_INTEGER;
   server_a[1].key = const_cast<char*>(GRPC_ARG_HTTP2_MAX_PING_STRIKES);
   server_a[1].value.integer = MAX_PING_STRIKES;
   server_a[2].type = GRPC_ARG_INTEGER;
   server_a[2].key = const_cast<char*>(GRPC_ARG_HTTP2_BDP_PROBE);
   server_a[2].value.integer = 0;
   grpc_channel_args client_args = {GPR_ARRAY_SIZE(client_a), client_a};
   grpc_channel_args server_args = {GPR_ARRAY_SIZE(server_a), server_a};

   config.init_client(&f, &client_args);
   config.init_server(&f, &server_args);

   grpc_call* c;
   grpc_call* s;
   gpr_timespec deadline = grpc_timeout_seconds_to_deadline(10);
   grpc_op ops[6];
   grpc_op* op;
   grpc_metadata_array initial_metadata_recv;
   grpc_metadata_array trailing_metadata_recv;
   grpc_metadata_array request_metadata_recv;
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
   grpc_slice details;
   int was_cancelled = 2;

   c = grpc_channel_create_call(f.client, nullptr, GRPC_PROPAGATE_DEFAULTS, f.cq,
                                grpc_slice_from_static_string("/foo"), nullptr,
                                deadline, nullptr);
   GPR_ASSERT(c);

   grpc_metadata_array_init(&initial_metadata_recv);
   grpc_metadata_array_init(&trailing_metadata_recv);
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);

   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op->data.send_initial_metadata.metadata = nullptr;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
   op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);

   error =
       grpc_server_request_call(f.server, &s, &call_details,
                                &request_metadata_recv, f.cq, f.cq, tag(101));
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
   cq_verify(cqv);

   // Send too many pings to the server similar to the prevous test case.
   // However, since we set the MAX_PINGS_WITHOUT_DATA at the client side, only
   // MAX_PING_STRIKES will actually be sent and the rpc will still succeed.
   int i;
   for (i = 1; i <= MAX_PING_STRIKES + 2; i++) {
     grpc_channel_ping(f.client, f.cq, tag(200 + i), nullptr);
     if (i <= MAX_PING_STRIKES) {
       CQ_EXPECT_COMPLETION(cqv, tag(200 + i), 1);
     }
     cq_verify(cqv);
   }

   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
   grpc_slice status_details = grpc_slice_from_static_string("xyz");
   op->data.send_status_from_server.status_details = &status_details;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
   error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);

   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
   // Client call should return.
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
   cq_verify(cqv);

   grpc_server_shutdown_and_notify(f.server, f.cq, tag(0xdead));
   CQ_EXPECT_COMPLETION(cqv, tag(0xdead), 1);

   // Also expect the previously blocked pings to complete with an error
   CQ_EXPECT_COMPLETION(cqv, tag(200 + MAX_PING_STRIKES + 1), 0);
   CQ_EXPECT_COMPLETION(cqv, tag(200 + MAX_PING_STRIKES + 2), 0);

   cq_verify(cqv);

   grpc_call_unref(s);

   // The rpc should be successful.
   GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
   GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));

   grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
   grpc_call_details_destroy(&call_details);
   grpc_call_unref(c);
   cq_verifier_destroy(cqv);
   end_test(&f);
   config.tear_down_data(&f);
 }

 void bad_ping(grpc_end2end_test_config config) {
   GPR_ASSERT(config.feature_mask & FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION);
   test_bad_ping(config);
   test_pings_without_data(config);
 }

 void bad_ping_pre_init(void) {}
	/*
	*
	* Copyright 2017 gRPC authors.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*
	*/

	#include "test/core/end2end/end2end_tests.h"

	#include <string.h>

	#include <grpc/support/alloc.h>
	#include <grpc/support/log.h>
	#include <grpc/support/sync.h>
	#include <grpc/support/time.h>

	#include "src/core/lib/gpr/useful.h"
	#include "test/core/end2end/cq_verifier.h"

	#define MAX_PING_STRIKES 2

	static void* tag(intptr_t t) { return (void*)t; }

	static void drain_cq(grpc_completion_queue* cq) {
	grpc_event ev;
	do {
	ev = grpc_completion_queue_next(cq, grpc_timeout_seconds_to_deadline(5),
	nullptr);
	} while (ev.type != GRPC_QUEUE_SHUTDOWN);
	}

	static void shutdown_server(grpc_end2end_test_fixture* f) {
	if (!f->server) return;
	grpc_server_destroy(f->server);
	f->server = nullptr;
	}

	static void shutdown_client(grpc_end2end_test_fixture* f) {
	if (!f->client) return;
	grpc_channel_destroy(f->client);
	f->client = nullptr;
	}

	static void end_test(grpc_end2end_test_fixture* f) {
	shutdown_server(f);
	shutdown_client(f);

	grpc_completion_queue_shutdown(f->cq);
	drain_cq(f->cq);
	grpc_completion_queue_destroy(f->cq);
	grpc_completion_queue_destroy(f->shutdown_cq);
	}

	// Send more pings than server allows to trigger server's GOAWAY.
	static void test_bad_ping(grpc_end2end_test_config config) {
	grpc_end2end_test_fixture f = config.create_fixture(nullptr, nullptr);
	cq_verifier* cqv = cq_verifier_create(f.cq);
	grpc_arg client_a[3];
	client_a[0].type = GRPC_ARG_INTEGER;
	client_a[0].key =
	const_cast<char*>(GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS);
	client_a[0].value.integer = 10;
	client_a[1].type = GRPC_ARG_INTEGER;
	client_a[1].key = const_cast<char*>(GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA);
	client_a[1].value.integer = 0;
	client_a[2].type = GRPC_ARG_INTEGER;
	client_a[2].key = const_cast<char*>(GRPC_ARG_HTTP2_BDP_PROBE);
	client_a[2].value.integer = 0;
	grpc_arg server_a[3];
	server_a[0].type = GRPC_ARG_INTEGER;
	server_a[0].key =
	const_cast<char*>(GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS);
	server_a[0].value.integer = 300000 /* 5 minutes */;
	server_a[1].type = GRPC_ARG_INTEGER;
	server_a[1].key = const_cast<char*>(GRPC_ARG_HTTP2_MAX_PING_STRIKES);
	server_a[1].value.integer = MAX_PING_STRIKES;
	server_a[2].type = GRPC_ARG_INTEGER;
	server_a[2].key = const_cast<char*>(GRPC_ARG_HTTP2_BDP_PROBE);
	server_a[2].value.integer = 0;
	grpc_channel_args client_args = {GPR_ARRAY_SIZE(client_a), client_a};
	grpc_channel_args server_args = {GPR_ARRAY_SIZE(server_a), server_a};

	config.init_client(&f, &client_args);
	config.init_server(&f, &server_args);

	grpc_call* c;
	grpc_call* s;
	gpr_timespec deadline = grpc_timeout_seconds_to_deadline(10);
	grpc_op ops[6];
	grpc_op* op;
	grpc_metadata_array initial_metadata_recv;
	grpc_metadata_array trailing_metadata_recv;
	grpc_metadata_array request_metadata_recv;
	grpc_call_details call_details;
	grpc_status_code status;
	grpc_call_error error;
	grpc_slice details;
	int was_cancelled = 2;

	c = grpc_channel_create_call(f.client, nullptr, GRPC_PROPAGATE_DEFAULTS, f.cq,
	grpc_slice_from_static_string("/foo"), nullptr,
	deadline, nullptr);
	GPR_ASSERT(c);

	grpc_metadata_array_init(&initial_metadata_recv);
	grpc_metadata_array_init(&trailing_metadata_recv);
	grpc_metadata_array_init(&request_metadata_recv);
	grpc_call_details_init(&call_details);

	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_SEND_INITIAL_METADATA;
	op->data.send_initial_metadata.count = 0;
	op->data.send_initial_metadata.metadata = nullptr;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	op->op = GRPC_OP_RECV_INITIAL_METADATA;
	op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
	op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
	op->data.recv_status_on_client.status = &status;
	op->data.recv_status_on_client.status_details = &details;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);

	error =
	grpc_server_request_call(f.server, &s, &call_details,
	&request_metadata_recv, f.cq, f.cq, tag(101));
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
	cq_verify(cqv);

	// Send too many pings to the server to trigger the punishment:
	// The first ping will let server mark its last_recv time. Afterwards, each
	// ping will trigger a ping strike, and we need at least MAX_PING_STRIKES
	// strikes to trigger the punishment. So (MAX_PING_STRIKES + 2) pings are
	// needed here.
	int i;
	for (i = 1; i <= MAX_PING_STRIKES + 2; i++) {
	grpc_channel_ping(f.client, f.cq, tag(200 + i), nullptr);
	CQ_EXPECT_COMPLETION(cqv, tag(200 + i), 1);
	if (i == MAX_PING_STRIKES + 2) {
	CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
	}
	cq_verify(cqv);
	}

	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_SEND_INITIAL_METADATA;
	op->data.send_initial_metadata.count = 0;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
	op->data.send_status_from_server.trailing_metadata_count = 0;
	op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
	grpc_slice status_details = grpc_slice_from_static_string("xyz");
	op->data.send_status_from_server.status_details = &status_details;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
	op->data.recv_close_on_server.cancelled = &was_cancelled;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);

	CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
	cq_verify(cqv);

	grpc_server_shutdown_and_notify(f.server, f.cq, tag(0xdead));
	CQ_EXPECT_COMPLETION(cqv, tag(0xdead), 1);
	cq_verify(cqv);

	grpc_call_unref(s);

	// The connection should be closed immediately after the misbehaved pings,
	// the in-progress RPC should fail.
	GPR_ASSERT(status == GRPC_STATUS_UNAVAILABLE);
	GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
	GPR_ASSERT(was_cancelled == 1);

	grpc_slice_unref(details);
	grpc_metadata_array_destroy(&initial_metadata_recv);
	grpc_metadata_array_destroy(&trailing_metadata_recv);
	grpc_metadata_array_destroy(&request_metadata_recv);
	grpc_call_details_destroy(&call_details);
	grpc_call_unref(c);
	cq_verifier_destroy(cqv);
	end_test(&f);
	config.tear_down_data(&f);
	}

	// Try sending more pings than server allows, but server should be fine because
	// max_pings_without_data should limit pings sent out on wire.
	static void test_pings_without_data(grpc_end2end_test_config config) {
	grpc_end2end_test_fixture f = config.create_fixture(nullptr, nullptr);
	cq_verifier* cqv = cq_verifier_create(f.cq);
	grpc_arg client_a[3];
	client_a[0].type = GRPC_ARG_INTEGER;
	client_a[0].key =
	const_cast<char*>(GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS);
	client_a[0].value.integer = 10;
	// Only allow MAX_PING_STRIKES pings without data (DATA/HEADERS/WINDOW_UPDATE)
	// so that the transport will throttle the excess pings.
	client_a[1].type = GRPC_ARG_INTEGER;
	client_a[1].key = const_cast<char*>(GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA);
	client_a[1].value.integer = MAX_PING_STRIKES;
	client_a[2].type = GRPC_ARG_INTEGER;
	client_a[2].key = const_cast<char*>(GRPC_ARG_HTTP2_BDP_PROBE);
	client_a[2].value.integer = 0;
	grpc_arg server_a[3];
	server_a[0].type = GRPC_ARG_INTEGER;
	server_a[0].key =
	const_cast<char*>(GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS);
	server_a[0].value.integer = 300000 /* 5 minutes */;
	server_a[1].type = GRPC_ARG_INTEGER;
	server_a[1].key = const_cast<char*>(GRPC_ARG_HTTP2_MAX_PING_STRIKES);
	server_a[1].value.integer = MAX_PING_STRIKES;
	server_a[2].type = GRPC_ARG_INTEGER;
	server_a[2].key = const_cast<char*>(GRPC_ARG_HTTP2_BDP_PROBE);
	server_a[2].value.integer = 0;
	grpc_channel_args client_args = {GPR_ARRAY_SIZE(client_a), client_a};
	grpc_channel_args server_args = {GPR_ARRAY_SIZE(server_a), server_a};

	config.init_client(&f, &client_args);
	config.init_server(&f, &server_args);

	grpc_call* c;
	grpc_call* s;
	gpr_timespec deadline = grpc_timeout_seconds_to_deadline(10);
	grpc_op ops[6];
	grpc_op* op;
	grpc_metadata_array initial_metadata_recv;
	grpc_metadata_array trailing_metadata_recv;
	grpc_metadata_array request_metadata_recv;
	grpc_call_details call_details;
	grpc_status_code status;
	grpc_call_error error;
	grpc_slice details;
	int was_cancelled = 2;

	c = grpc_channel_create_call(f.client, nullptr, GRPC_PROPAGATE_DEFAULTS, f.cq,
	grpc_slice_from_static_string("/foo"), nullptr,
	deadline, nullptr);
	GPR_ASSERT(c);

	grpc_metadata_array_init(&initial_metadata_recv);
	grpc_metadata_array_init(&trailing_metadata_recv);
	grpc_metadata_array_init(&request_metadata_recv);
	grpc_call_details_init(&call_details);

	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_SEND_INITIAL_METADATA;
	op->data.send_initial_metadata.count = 0;
	op->data.send_initial_metadata.metadata = nullptr;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	op->op = GRPC_OP_RECV_INITIAL_METADATA;
	op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
	op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
	op->data.recv_status_on_client.status = &status;
	op->data.recv_status_on_client.status_details = &details;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);

	error =
	grpc_server_request_call(f.server, &s, &call_details,
	&request_metadata_recv, f.cq, f.cq, tag(101));
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
	cq_verify(cqv);

	// Send too many pings to the server similar to the prevous test case.
	// However, since we set the MAX_PINGS_WITHOUT_DATA at the client side, only
	// MAX_PING_STRIKES will actually be sent and the rpc will still succeed.
	int i;
	for (i = 1; i <= MAX_PING_STRIKES + 2; i++) {
	grpc_channel_ping(f.client, f.cq, tag(200 + i), nullptr);
	if (i <= MAX_PING_STRIKES) {
	CQ_EXPECT_COMPLETION(cqv, tag(200 + i), 1);
	}
	cq_verify(cqv);
	}

	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_SEND_INITIAL_METADATA;
	op->data.send_initial_metadata.count = 0;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
	op->data.send_status_from_server.trailing_metadata_count = 0;
	op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
	grpc_slice status_details = grpc_slice_from_static_string("xyz");
	op->data.send_status_from_server.status_details = &status_details;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
	op->data.recv_close_on_server.cancelled = &was_cancelled;
	op->flags = 0;
	op->reserved = nullptr;
	op++;
	error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);

	CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
	// Client call should return.
	CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
	cq_verify(cqv);

	grpc_server_shutdown_and_notify(f.server, f.cq, tag(0xdead));
	CQ_EXPECT_COMPLETION(cqv, tag(0xdead), 1);

	// Also expect the previously blocked pings to complete with an error
	CQ_EXPECT_COMPLETION(cqv, tag(200 + MAX_PING_STRIKES + 1), 0);
	CQ_EXPECT_COMPLETION(cqv, tag(200 + MAX_PING_STRIKES + 2), 0);

	cq_verify(cqv);

	grpc_call_unref(s);

	// The rpc should be successful.
	GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
	GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));

	grpc_slice_unref(details);
	grpc_metadata_array_destroy(&initial_metadata_recv);
	grpc_metadata_array_destroy(&trailing_metadata_recv);
	grpc_metadata_array_destroy(&request_metadata_recv);
	grpc_call_details_destroy(&call_details);
	grpc_call_unref(c);
	cq_verifier_destroy(cqv);
	end_test(&f);
	config.tear_down_data(&f);
	}

	void bad_ping(grpc_end2end_test_config config) {
	GPR_ASSERT(config.feature_mask & FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION);
	test_bad_ping(config);
	test_pings_without_data(config);
	}

	void bad_ping_pre_init(void) {}