1 /*
2 *
3 * Copyright 2016 gRPC authors.
4 *
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
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
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.
16 *
17 */
18
19 #include <string.h>
20
21 #include <grpc/grpc.h>
22 #include <grpc/support/alloc.h>
23 #include <grpc/support/string_util.h>
24
25 #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
26 #include "src/core/lib/iomgr/executor.h"
27 #include "src/core/lib/slice/slice_internal.h"
28 #include "src/core/lib/surface/channel.h"
29 #include "test/core/util/mock_endpoint.h"
30
31 bool squelch = true;
32 bool leak_check = true;
33
discard_write(grpc_slice)34 static void discard_write(grpc_slice /*slice*/) {}
35
tag(int n)36 static void* tag(int n) { return (void*)static_cast<uintptr_t>(n); }
37
dont_log(gpr_log_func_args *)38 static void dont_log(gpr_log_func_args* /*args*/) {}
39
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)40 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
41 grpc_test_only_set_slice_hash_seed(0);
42 if (squelch) gpr_set_log_function(dont_log);
43 grpc_init();
44 {
45 grpc_core::ExecCtx exec_ctx;
46 grpc_core::Executor::SetThreadingAll(false);
47
48 grpc_resource_quota* resource_quota =
49 grpc_resource_quota_create("client_fuzzer");
50 grpc_endpoint* mock_endpoint =
51 grpc_mock_endpoint_create(discard_write, resource_quota);
52 grpc_resource_quota_unref_internal(resource_quota);
53
54 grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
55 grpc_transport* transport =
56 grpc_create_chttp2_transport(nullptr, mock_endpoint, true);
57 grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
58
59 grpc_arg authority_arg = grpc_channel_arg_string_create(
60 const_cast<char*>(GRPC_ARG_DEFAULT_AUTHORITY),
61 const_cast<char*>("test-authority"));
62 grpc_channel_args* args =
63 grpc_channel_args_copy_and_add(nullptr, &authority_arg, 1);
64 grpc_channel* channel = grpc_channel_create(
65 "test-target", args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
66 grpc_channel_args_destroy(args);
67 grpc_slice host = grpc_slice_from_static_string("localhost");
68 grpc_call* call = grpc_channel_create_call(
69 channel, nullptr, 0, cq, grpc_slice_from_static_string("/foo"), &host,
70 gpr_inf_future(GPR_CLOCK_REALTIME), nullptr);
71
72 grpc_metadata_array initial_metadata_recv;
73 grpc_metadata_array_init(&initial_metadata_recv);
74 grpc_byte_buffer* response_payload_recv = nullptr;
75 grpc_metadata_array trailing_metadata_recv;
76 grpc_metadata_array_init(&trailing_metadata_recv);
77 grpc_status_code status;
78 grpc_slice details = grpc_empty_slice();
79
80 grpc_op ops[6];
81 memset(ops, 0, sizeof(ops));
82 grpc_op* op = ops;
83 op->op = GRPC_OP_SEND_INITIAL_METADATA;
84 op->data.send_initial_metadata.count = 0;
85 op->flags = 0;
86 op->reserved = nullptr;
87 op++;
88 op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
89 op->flags = 0;
90 op->reserved = nullptr;
91 op++;
92 op->op = GRPC_OP_RECV_INITIAL_METADATA;
93 op->data.recv_initial_metadata.recv_initial_metadata =
94 &initial_metadata_recv;
95 op->flags = 0;
96 op->reserved = nullptr;
97 op++;
98 op->op = GRPC_OP_RECV_MESSAGE;
99 op->data.recv_message.recv_message = &response_payload_recv;
100 op->flags = 0;
101 op->reserved = nullptr;
102 op++;
103 op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
104 op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
105 op->data.recv_status_on_client.status = &status;
106 op->data.recv_status_on_client.status_details = &details;
107 op->flags = 0;
108 op->reserved = nullptr;
109 op++;
110 grpc_call_error error =
111 grpc_call_start_batch(call, ops, (size_t)(op - ops), tag(1), nullptr);
112 int requested_calls = 1;
113 GPR_ASSERT(GRPC_CALL_OK == error);
114
115 grpc_mock_endpoint_put_read(
116 mock_endpoint, grpc_slice_from_copied_buffer((const char*)data, size));
117
118 grpc_event ev;
119 while (1) {
120 grpc_core::ExecCtx::Get()->Flush();
121 ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
122 nullptr);
123 switch (ev.type) {
124 case GRPC_QUEUE_TIMEOUT:
125 goto done;
126 case GRPC_QUEUE_SHUTDOWN:
127 break;
128 case GRPC_OP_COMPLETE:
129 requested_calls--;
130 break;
131 }
132 }
133
134 done:
135 if (requested_calls) {
136 grpc_call_cancel(call, nullptr);
137 }
138 for (int i = 0; i < requested_calls; i++) {
139 ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
140 nullptr);
141 GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
142 }
143 grpc_completion_queue_shutdown(cq);
144 for (int i = 0; i < requested_calls; i++) {
145 ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
146 nullptr);
147 GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
148 }
149 grpc_call_unref(call);
150 grpc_completion_queue_destroy(cq);
151 grpc_metadata_array_destroy(&initial_metadata_recv);
152 grpc_metadata_array_destroy(&trailing_metadata_recv);
153 grpc_slice_unref(details);
154 grpc_channel_destroy(channel);
155 if (response_payload_recv != nullptr) {
156 grpc_byte_buffer_destroy(response_payload_recv);
157 }
158 }
159 grpc_shutdown_blocking();
160 return 0;
161 }
162