text: /*
   *
   * Copyright 2015, Google Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  
  #include "test/core/end2end/end2end_tests.h"
  
  #include <stdio.h>
  #include <string.h>
  
  #include <grpc/byte_buffer.h>
  #include <grpc/support/alloc.h>
  #include <grpc/support/log.h>
  #include <grpc/support/time.h>
  #include <grpc/support/useful.h>
  #include "test/core/end2end/cq_verifier.h"
  
  static void *tag(intptr_t t) { return (void *)t; }
  
  static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                              const char *test_name,
                                              grpc_channel_args *client_args,
                                              grpc_channel_args *server_args,
                                              const char *query_args) {
    grpc_end2end_test_fixture f;
    gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
    // We intentionally do not pass the client and server args to
    // create_fixture(), since we don't want the limit enforced on the
    // proxy, only on the backend server.
    f = config.create_fixture(NULL, NULL);
    config.init_server(&f, server_args);
    config.init_client(&f, client_args, query_args);
    return f;
  }
  
  static gpr_timespec n_seconds_time(int n) {
    return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
  }
  
  static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
  
  static void drain_cq(grpc_completion_queue *cq) {
    grpc_event ev;
    do {
      ev = grpc_completion_queue_next(cq, five_seconds_time(), NULL);
    } while (ev.type != GRPC_QUEUE_SHUTDOWN);
  }
  
  static void shutdown_server(grpc_end2end_test_fixture *f) {
    if (!f->server) return;
    grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
    GPR_ASSERT(grpc_completion_queue_pluck(
                   f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
                   .type == GRPC_OP_COMPLETE);
    grpc_server_destroy(f->server);
    f->server = NULL;
  }
  
  static void shutdown_client(grpc_end2end_test_fixture *f) {
    if (!f->client) return;
    grpc_channel_destroy(f->client);
    f->client = NULL;
  }
  
  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);
  }
  
  // Test with request larger than the limit.
  // If send_limit is true, applies send limit on client; otherwise, applies
  // recv limit on server.
  static void test_max_message_length_on_request(grpc_end2end_test_config config,
                                                 bool send_limit,
                                                 bool use_service_config) {
    gpr_log(GPR_INFO, "testing request with send_limit=%d use_service_config=%d",
            send_limit, use_service_config);
  
    grpc_end2end_test_fixture f;
    grpc_arg channel_arg;
    grpc_channel_args channel_args;
    grpc_call *c = NULL;
    grpc_call *s = NULL;
    cq_verifier *cqv;
    grpc_op ops[6];
    grpc_op *op;
    gpr_slice request_payload_slice = gpr_slice_from_copied_string("hello world");
    grpc_byte_buffer *request_payload =
        grpc_raw_byte_buffer_create(&request_payload_slice, 1);
    grpc_byte_buffer *recv_payload = NULL;
    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;
    char *details = NULL;
    size_t details_capacity = 0;
    int was_cancelled = 2;
  
    char *query_args = NULL;
    grpc_channel_args *client_args = NULL;
    grpc_channel_args *server_args = NULL;
    if (use_service_config) {
      // We don't currently support service configs on the server side.
      GPR_ASSERT(send_limit);
      query_args =
          "method_name=/service/method"
          "&max_request_message_bytes=5";
    } else {
      // Set limit via channel args.
      channel_arg.key = send_limit ? GRPC_ARG_MAX_SEND_MESSAGE_LENGTH
                                   : GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH;
      channel_arg.type = GRPC_ARG_INTEGER;
      channel_arg.value.integer = 5;
      channel_args.num_args = 1;
      channel_args.args = &channel_arg;
      if (send_limit) {
        client_args = &channel_args;
      } else {
        server_args = &channel_args;
      }
    }
  
    f = begin_test(config, "test_max_request_message_length", client_args,
                   server_args, query_args);
    cqv = cq_verifier_create(f.cq);
  
    c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
                                 "/service/method", "foo.test.google.fr:1234",
                                 gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
    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->flags = 0;
    op->reserved = NULL;
    op++;
    op->op = GRPC_OP_SEND_MESSAGE;
    op->data.send_message = request_payload;
    op->flags = 0;
    op->reserved = NULL;
    op++;
    op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
    op->flags = 0;
    op->reserved = NULL;
    op++;
    op->op = GRPC_OP_RECV_INITIAL_METADATA;
    op->data.recv_initial_metadata = &initial_metadata_recv;
    op->flags = 0;
    op->reserved = NULL;
    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->data.recv_status_on_client.status_details_capacity = &details_capacity;
    op->flags = 0;
    op->reserved = NULL;
    op++;
    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
    GPR_ASSERT(GRPC_CALL_OK == error);
  
    if (send_limit) {
      CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
      cq_verify(cqv);
      goto done;
    }
  
    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);
  
    memset(ops, 0, sizeof(ops));
    op = ops;
    op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
    op->data.recv_close_on_server.cancelled = &was_cancelled;
    op->flags = 0;
    op->reserved = NULL;
    op++;
    op->op = GRPC_OP_RECV_MESSAGE;
    op->data.recv_message = &recv_payload;
    op->flags = 0;
    op->reserved = NULL;
    op++;
    error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
    GPR_ASSERT(GRPC_CALL_OK == error);
  
    CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
    CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
    cq_verify(cqv);
  
    GPR_ASSERT(0 == strcmp(call_details.method, "/service/method"));
    GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
    GPR_ASSERT(was_cancelled == 1);
  
  done:
    GPR_ASSERT(status == GRPC_STATUS_INVALID_ARGUMENT);
    GPR_ASSERT(strcmp(details,
                      send_limit
                          ? "Sent message larger than max (11 vs. 5)"
                          : "Received message larger than max (11 vs. 5)") == 0);
  
    gpr_free(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_byte_buffer_destroy(request_payload);
    grpc_byte_buffer_destroy(recv_payload);
  
    grpc_call_destroy(c);
    if (s != NULL) grpc_call_destroy(s);
  
    cq_verifier_destroy(cqv);
  
    end_test(&f);
    config.tear_down_data(&f);
  }
  
  // Test with response larger than the limit.
  // If send_limit is true, applies send limit on server; otherwise, applies
  // recv limit on client.
  static void test_max_message_length_on_response(grpc_end2end_test_config config,
                                                  bool send_limit,
                                                  bool use_service_config) {
    gpr_log(GPR_INFO, "testing response with send_limit=%d use_service_config=%d",
            send_limit, use_service_config);
  
    grpc_end2end_test_fixture f;
    grpc_arg channel_arg;
    grpc_channel_args channel_args;
    grpc_call *c = NULL;
    grpc_call *s = NULL;
    cq_verifier *cqv;
    grpc_op ops[6];
    grpc_op *op;
    gpr_slice response_payload_slice =
        gpr_slice_from_copied_string("hello world");
    grpc_byte_buffer *response_payload =
        grpc_raw_byte_buffer_create(&response_payload_slice, 1);
    grpc_byte_buffer *recv_payload = NULL;
    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;
    char *details = NULL;
    size_t details_capacity = 0;
    int was_cancelled = 2;
  
    char *query_args = NULL;
    grpc_channel_args *client_args = NULL;
    grpc_channel_args *server_args = NULL;
    if (use_service_config) {
      // We don't currently support service configs on the server side.
      GPR_ASSERT(!send_limit);
      query_args =
          "method_name=/service/method"
          "&max_response_message_bytes=5";
    } else {
      // Set limit via channel args.
      channel_arg.key = send_limit ? GRPC_ARG_MAX_SEND_MESSAGE_LENGTH
                                   : GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH;
      channel_arg.type = GRPC_ARG_INTEGER;
      channel_arg.value.integer = 5;
      channel_args.num_args = 1;
      channel_args.args = &channel_arg;
      if (send_limit) {
        server_args = &channel_args;
      } else {
        client_args = &channel_args;
      }
    }
  
    f = begin_test(config, "test_max_response_message_length", client_args,
                   server_args, query_args);
    cqv = cq_verifier_create(f.cq);
  
    c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
                                 "/service/method", "foo.test.google.fr:1234",
                                 gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
    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->flags = 0;
    op->reserved = NULL;
    op++;
    op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
    op->flags = 0;
    op->reserved = NULL;
    op++;
    op->op = GRPC_OP_RECV_INITIAL_METADATA;
    op->data.recv_initial_metadata = &initial_metadata_recv;
    op->flags = 0;
    op->reserved = NULL;
    op++;
    op->op = GRPC_OP_RECV_MESSAGE;
    op->data.recv_message = &recv_payload;
    op->flags = 0;
    op->reserved = NULL;
    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->data.recv_status_on_client.status_details_capacity = &details_capacity;
    op->flags = 0;
    op->reserved = NULL;
    op++;
    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
    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);
  
    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 = NULL;
    op++;
    op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
    op->data.recv_close_on_server.cancelled = &was_cancelled;
    op->flags = 0;
    op->reserved = NULL;
    op++;
    op->op = GRPC_OP_SEND_MESSAGE;
    op->data.send_message = response_payload;
    op->flags = 0;
    op->reserved = NULL;
    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_OK;
    op->data.send_status_from_server.status_details = "xyz";
    op->flags = 0;
    op->reserved = NULL;
    op++;
    error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
    GPR_ASSERT(GRPC_CALL_OK == error);
  
    CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
    CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
    cq_verify(cqv);
  
    GPR_ASSERT(0 == strcmp(call_details.method, "/service/method"));
    GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr:1234"));
  
    GPR_ASSERT(status == GRPC_STATUS_INVALID_ARGUMENT);
    GPR_ASSERT(strcmp(details,
                      send_limit
                          ? "Sent message larger than max (11 vs. 5)"
                          : "Received message larger than max (11 vs. 5)") == 0);
  
    gpr_free(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_byte_buffer_destroy(response_payload);
    grpc_byte_buffer_destroy(recv_payload);
  
    grpc_call_destroy(c);
    if (s != NULL) grpc_call_destroy(s);
  
    cq_verifier_destroy(cqv);
  
    end_test(&f);
    config.tear_down_data(&f);
  }
  
  void max_message_length(grpc_end2end_test_config config) {
    test_max_message_length_on_request(config, false /* send_limit */,
                                       false /* use_service_config */);
    test_max_message_length_on_request(config, true /* send_limit */,
                                       false /* use_service_config */);
    test_max_message_length_on_response(config, false /* send_limit */,
                                        false /* use_service_config */);
    test_max_message_length_on_response(config, true /* send_limit */,
                                        false /* use_service_config */);
    if (config.feature_mask & FEATURE_MASK_SUPPORTS_QUERY_ARGS) {
      test_max_message_length_on_request(config, true /* send_limit */,
                                         true /* use_service_config */);
      test_max_message_length_on_response(config, false /* send_limit */,
                                          true /* use_service_config */);
    }
  }
  
  void max_message_length_pre_init(void) {}
  