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bootstrap-extensions: fix a crash on http callout (envoyproxy#14478)
Currently when the ServerFactoryContext is passed to bootstrap extensions, it is only partially initialized. Specifically, attempting to access the cluster manager will cause a nullptr access (and hence a crash) This PR splits the creation and initialized to 2 seperate fucntions. Early creation is required to not break the `default_socket_interface` feature. Once created, the extension will receive the ServerFactoryContext in a different callback (the newly added `serverInitialized`), once they are fully initialized. Commit Message: Fix a crash that happens when bootstrap extensions perform http calls. Additional Description: Risk Level: Low (small bug-fix) Testing: Unit tests updated; tested manually with the changes as well. Docs Changes: N/A Release Notes: N/A Fixes envoyproxy#14420 Signed-off-by: Yuval Kohavi <yuval.kohavi@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| // NOLINT(namespace-envoy) | ||
| #include <string> | ||
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| #include "proxy_wasm_intrinsics.h" | ||
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| template <typename T> std::unique_ptr<T> wrap_unique(T* ptr) { return std::unique_ptr<T>(ptr); } | ||
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| START_WASM_PLUGIN(WasmHttpCpp) | ||
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| // Required Proxy-Wasm ABI version. | ||
| WASM_EXPORT(void, proxy_abi_version_0_1_0, ()) {} | ||
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| WASM_EXPORT(uint32_t, proxy_on_configure, (uint32_t, uint32_t)) { | ||
| proxy_set_tick_period_milliseconds(100); | ||
| return 1; | ||
| } | ||
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| WASM_EXPORT(void, proxy_on_tick, (uint32_t)) { | ||
| HeaderStringPairs headers; | ||
| headers.push_back(std::make_pair<std::string, std::string>(":method", "GET")); | ||
| headers.push_back(std::make_pair<std::string, std::string>(":path", "/")); | ||
| headers.push_back(std::make_pair<std::string, std::string>(":authority", "example.com")); | ||
| headers.push_back(std::make_pair<std::string, std::string>("x-test", "test")); | ||
| HeaderStringPairs trailers; | ||
| uint32_t token; | ||
| WasmResult result = makeHttpCall("wasm_cluster", headers, "", trailers, 10000, &token); | ||
| // We have sent successfully, stop timer - we only want to send one request. | ||
| if (result == WasmResult::Ok) { | ||
| proxy_set_tick_period_milliseconds(0); | ||
| } | ||
| } | ||
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| WASM_EXPORT(void, proxy_on_http_call_response, (uint32_t, uint32_t, uint32_t headers, uint32_t, uint32_t)) { | ||
| if (headers != 0) { | ||
| auto status = getHeaderMapValue(WasmHeaderMapType::HttpCallResponseHeaders, "status"); | ||
| if ("200" == status->view()) { | ||
| proxy_set_tick_period_milliseconds(0); | ||
| return; | ||
| } | ||
| } | ||
| // Request failed - very possibly because of the integration test not being ready. | ||
| // Try again to prevent flakes. | ||
| proxy_set_tick_period_milliseconds(100); | ||
| } | ||
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| END_WASM_PLUGIN |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| #include "extensions/common/wasm/wasm.h" | ||
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| #include "test/extensions/common/wasm/wasm_runtime.h" | ||
| #include "test/integration/http_protocol_integration.h" | ||
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| #include "gtest/gtest.h" | ||
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| namespace Envoy { | ||
| namespace Extensions { | ||
| namespace Wasm { | ||
| namespace { | ||
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| class WasmIntegrationTest : public HttpIntegrationTest, public testing::TestWithParam<std::string> { | ||
| public: | ||
| WasmIntegrationTest() | ||
| : HttpIntegrationTest(Http::CodecClient::Type::HTTP1, Network::Address::IpVersion::v4) {} | ||
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| void createUpstreams() override { | ||
| HttpIntegrationTest::createUpstreams(); | ||
| addFakeUpstream(FakeHttpConnection::Type::HTTP1); | ||
| } | ||
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| void cleanup() { | ||
| if (wasm_connection_ != nullptr) { | ||
| ASSERT_TRUE(wasm_connection_->close()); | ||
| ASSERT_TRUE(wasm_connection_->waitForDisconnect()); | ||
| } | ||
| cleanupUpstreamAndDownstream(); | ||
| } | ||
| void initialize() override { | ||
| auto httpwasm = TestEnvironment::substitute( | ||
| "{{ test_rundir }}/test/extensions/bootstrap/wasm/test_data/http_cpp.wasm"); | ||
| config_helper_.addConfigModifier([](envoy::config::bootstrap::v3::Bootstrap& bootstrap) { | ||
| auto* wasm = bootstrap.mutable_static_resources()->add_clusters(); | ||
| wasm->MergeFrom(bootstrap.static_resources().clusters()[0]); | ||
| wasm->set_name("wasm_cluster"); | ||
| }); | ||
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| config_helper_.addBootstrapExtension(fmt::format(R"EOF( | ||
| name: envoy.filters.http.wasm | ||
| typed_config: | ||
| '@type': type.googleapis.com/envoy.extensions.wasm.v3.WasmService | ||
| singleton: true | ||
| config: | ||
| name: "singleton" | ||
| root_id: "singleton" | ||
| configuration: | ||
| '@type': type.googleapis.com/google.protobuf.StringValue | ||
| value: "" | ||
| vm_config: | ||
| vm_id: "my_vm_id" | ||
| runtime: "envoy.wasm.runtime.{}" | ||
| code: | ||
| local: | ||
| filename: {} | ||
| )EOF", | ||
| GetParam(), httpwasm)); | ||
| HttpIntegrationTest::initialize(); | ||
| } | ||
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| FakeHttpConnectionPtr wasm_connection_; | ||
| FakeStreamPtr wasm_request_; | ||
| IntegrationStreamDecoderPtr response_; | ||
| }; | ||
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| INSTANTIATE_TEST_SUITE_P(Runtimes, WasmIntegrationTest, | ||
| Envoy::Extensions::Common::Wasm::sandbox_runtime_values, | ||
| Envoy::Extensions::Common::Wasm::wasmTestParamsToString); | ||
| GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(WasmIntegrationTest); | ||
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| TEST_P(WasmIntegrationTest, FilterMakesCallInConfigureTime) { | ||
| initialize(); | ||
| ASSERT_TRUE(fake_upstreams_.back()->waitForHttpConnection(*dispatcher_, wasm_connection_)); | ||
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| // Expect the filter to send us an HTTP request | ||
| ASSERT_TRUE(wasm_connection_->waitForNewStream(*dispatcher_, wasm_request_)); | ||
| ASSERT_TRUE(wasm_request_->waitForEndStream(*dispatcher_)); | ||
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| EXPECT_EQ("test", wasm_request_->headers() | ||
| .get(Envoy::Http::LowerCaseString("x-test"))[0] | ||
| ->value() | ||
| .getStringView()); | ||
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| // Respond back to the filter. | ||
| Http::TestResponseHeaderMapImpl response_headers{ | ||
| {":status", "200"}, | ||
| }; | ||
| wasm_request_->encodeHeaders(response_headers, true); | ||
| cleanup(); | ||
| } | ||
|
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| } // namespace | ||
| } // namespace Wasm | ||
| } // namespace Extensions | ||
| } // namespace Envoy |
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