| /* |
| * |
| * Copyright 2016 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 <grpc/census.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/port_platform.h> |
| #include <grpc/support/useful.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include "src/core/ext/census/base_resources.h" |
| #include "src/core/ext/census/resource.h" |
| #include "test/core/util/test_config.h" |
| |
| #include "src/core/ext/census/gen/trace_context.pb.h" |
| #include "src/core/ext/census/trace_context.h" |
| #include "third_party/nanopb/pb_decode.h" |
| #include "third_party/nanopb/pb_encode.h" |
| |
| #define BUF_SIZE 256 |
| |
| /* Encodes a TraceContext structure (ctxt1) to a buffer, and then decodes it |
| to a second TraceContext (ctxt2). Validates that the resulting TraceContext |
| has a span_id, trace_id, and that the values are equal to those in initial |
| TraceContext. On success, returns true. If encode_trace_context returns 0, |
| decode_trace_context fails, or the resulting TraceContext is missing a trace_id |
| or span_id, it will return false. */ |
| bool validate_encode_decode_context(google_trace_TraceContext *ctxt1, |
| uint8_t *buffer, size_t buf_size) { |
| google_trace_TraceContext ctxt2 = google_trace_TraceContext_init_zero; |
| size_t msg_length; |
| |
| msg_length = encode_trace_context(ctxt1, buffer, buf_size); |
| if (msg_length == 0) { |
| return false; |
| } |
| |
| if (!decode_trace_context(&ctxt2, buffer, msg_length)) { |
| return false; |
| } |
| |
| if (!ctxt2.has_trace_id_hi || !ctxt2.has_trace_id_lo || !ctxt2.has_span_id) { |
| return false; |
| } |
| |
| GPR_ASSERT(ctxt1->trace_id_hi == ctxt2.trace_id_hi && |
| ctxt1->trace_id_lo == ctxt2.trace_id_lo && |
| ctxt1->span_id == ctxt2.span_id && |
| ctxt1->has_span_options == ctxt2.has_span_options && |
| (ctxt1->has_span_options |
| ? ctxt1->span_options == ctxt2.span_options |
| : true)); |
| |
| return true; |
| } |
| |
| /* Decodes a proto-encoded TraceContext from a buffer. If decode_trace_context |
| fails or the resulting TraceContext is missing a trace_id or span_id it will |
| return false, otherwise returns true. */ |
| bool validate_decode_context(google_trace_TraceContext *ctxt, uint8_t *buffer, |
| size_t msg_length) { |
| // Validate the decoding of a context written to buffer. |
| if (!decode_trace_context(ctxt, buffer, msg_length)) { |
| return false; |
| } |
| |
| if (!ctxt->has_trace_id_hi || !ctxt->has_trace_id_lo || !ctxt->has_span_id) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* Read an encoded trace context from a file. Validates that the decoding |
| gives the expected result (succeed). */ |
| static void read_and_validate_context_from_file(google_trace_TraceContext *ctxt, |
| const char *file, |
| const bool succeed) { |
| uint8_t buffer[BUF_SIZE]; |
| FILE *input = fopen(file, "rb"); |
| GPR_ASSERT(input != NULL); |
| size_t nbytes = fread(buffer, 1, BUF_SIZE, input); |
| GPR_ASSERT(nbytes <= BUF_SIZE && feof(input) && !ferror(input)); |
| bool res = validate_decode_context(ctxt, buffer, nbytes); |
| GPR_ASSERT(res == succeed); |
| GPR_ASSERT(fclose(input) == 0); |
| } |
| |
| // Test full proto-buffer. |
| static void test_full() { |
| google_trace_TraceContext ctxt = google_trace_TraceContext_init_zero; |
| read_and_validate_context_from_file( |
| &ctxt, "test/core/census/data/context_full.pb", true); |
| } |
| |
| // Test empty proto-buffer. |
| static void test_empty() { |
| google_trace_TraceContext ctxt = google_trace_TraceContext_init_zero; |
| read_and_validate_context_from_file( |
| &ctxt, "test/core/census/data/context_empty.pb", false); |
| } |
| |
| // Test proto-buffer with only trace_id. |
| static void test_trace_only() { |
| google_trace_TraceContext ctxt = google_trace_TraceContext_init_zero; |
| read_and_validate_context_from_file( |
| &ctxt, "test/core/census/data/context_trace_only.pb", false); |
| } |
| |
| // Test proto-buffer with only span_id. |
| static void test_span_only() { |
| google_trace_TraceContext ctxt = google_trace_TraceContext_init_zero; |
| read_and_validate_context_from_file( |
| &ctxt, "test/core/census/data/context_span_only.pb", false); |
| } |
| |
| // Test proto-buffer without span_options value. |
| static void test_no_span_options() { |
| google_trace_TraceContext ctxt = google_trace_TraceContext_init_zero; |
| read_and_validate_context_from_file( |
| &ctxt, "test/core/census/data/context_no_span_options.pb", true); |
| GPR_ASSERT(ctxt.has_span_options == false && ctxt.span_options == 0); |
| } |
| |
| static void test_encode_decode() { |
| uint8_t buffer[BUF_SIZE] = {0}; |
| |
| google_trace_TraceContext ctxt1 = google_trace_TraceContext_init_zero; |
| ctxt1.has_trace_id_hi = true; |
| ctxt1.has_trace_id_lo = true; |
| ctxt1.trace_id_lo = 1; |
| ctxt1.trace_id_hi = 2; |
| ctxt1.has_span_id = true; |
| ctxt1.span_id = 3; |
| validate_encode_decode_context(&ctxt1, buffer, sizeof(buffer)); |
| |
| // Missing trace_id. This should fail. |
| google_trace_TraceContext ctxt2 = google_trace_TraceContext_init_zero; |
| ctxt2.has_trace_id_hi = false; |
| ctxt2.has_trace_id_lo = false; |
| ctxt2.has_span_id = true; |
| validate_encode_decode_context(&ctxt2, buffer, sizeof(buffer)); |
| } |
| |
| // Test a corrupted proto-buffer. This should fail. |
| static void test_corrupt() { |
| uint8_t buffer[BUF_SIZE] = {0}; |
| google_trace_TraceContext ctxt1 = google_trace_TraceContext_init_zero; |
| size_t msg_length; |
| |
| ctxt1.has_trace_id_hi = true; |
| ctxt1.has_trace_id_lo = true; |
| ctxt1.trace_id_lo = 1; |
| ctxt1.trace_id_hi = 2; |
| ctxt1.has_span_id = true; |
| ctxt1.span_id = 3; |
| ctxt1.has_span_options = true; |
| ctxt1.span_options = SPAN_OPTIONS_IS_SAMPLED; |
| msg_length = encode_trace_context(&ctxt1, buffer, sizeof(buffer)); |
| |
| /* Corrupt some bytes. 255 (0xFF) should be illegal for the first byte of the |
| proto encoded object. */ |
| buffer[0] = 255; |
| |
| bool res = validate_decode_context(&ctxt1, buffer, msg_length); |
| GPR_ASSERT(res == false); |
| } |
| |
| static void test_buffer_size() { |
| // This buffer is too small. This should fail. |
| uint8_t buffer[16] = {0}; |
| google_trace_TraceContext ctxt1 = google_trace_TraceContext_init_zero; |
| size_t msg_length; |
| |
| ctxt1.has_trace_id_hi = true; |
| ctxt1.has_trace_id_lo = true; |
| ctxt1.trace_id_lo = 1; |
| ctxt1.trace_id_hi = 2; |
| ctxt1.has_span_id = true; |
| ctxt1.span_id = 3; |
| ctxt1.has_span_options = true; |
| ctxt1.span_options = SPAN_OPTIONS_IS_SAMPLED; |
| msg_length = encode_trace_context(&ctxt1, buffer, sizeof(buffer)); |
| |
| GPR_ASSERT(msg_length == 0); |
| } |
| |
| int main(int argc, char **argv) { |
| grpc_test_init(argc, argv); |
| test_full(); |
| test_empty(); |
| test_trace_only(); |
| test_span_only(); |
| test_encode_decode(); |
| test_corrupt(); |
| test_no_span_options(); |
| test_buffer_size(); |
| |
| return 0; |
| } |