1 files changed, 219 insertions, 0 deletions
diff --git a/third_party/libwebrtc/p2p/base/stun_request_unittest.cc b/third_party/libwebrtc/p2p/base/stun_request_unittest.cc
new file mode 100644
index 0000000000..6831d9ffa2
--- /dev/null
+++ b/third_party/libwebrtc/p2p/base/stun_request_unittest.cc
@@ -0,0 +1,219 @@
+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "p2p/base/stun_request.h"
+
+#include <utility>
+#include <vector>
+
+#include "rtc_base/fake_clock.h"
+#include "rtc_base/gunit.h"
+#include "rtc_base/helpers.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/time_utils.h"
+#include "test/gtest.h"
+
+namespace cricket {
+namespace {
+std::unique_ptr<StunMessage> CreateStunMessage(
+    StunMessageType type,
+    const StunMessage* req = nullptr) {
+  std::unique_ptr<StunMessage> msg = std::make_unique<StunMessage>(
+      type, req ? req->transaction_id() : StunMessage::GenerateTransactionId());
+  return msg;
+}
+
+int TotalDelay(int sends) {
+  std::vector<int> delays = {0,    250,   750,   1750,  3750,
+                             7750, 15750, 23750, 31750, 39750};
+  return delays[sends];
+}
+}  // namespace
+
+class StunRequestTest : public ::testing::Test {
+ public:
+  StunRequestTest()
+      : manager_(rtc::Thread::Current(),
+                 [this](const void* data, size_t size, StunRequest* request) {
+                   OnSendPacket(data, size, request);
+                 }),
+        request_count_(0),
+        response_(NULL),
+        success_(false),
+        failure_(false),
+        timeout_(false) {}
+
+  void OnSendPacket(const void* data, size_t size, StunRequest* req) {
+    request_count_++;
+  }
+
+  void OnResponse(StunMessage* res) {
+    response_ = res;
+    success_ = true;
+  }
+  void OnErrorResponse(StunMessage* res) {
+    response_ = res;
+    failure_ = true;
+  }
+  void OnTimeout() { timeout_ = true; }
+
+ protected:
+  rtc::AutoThread main_thread_;
+  StunRequestManager manager_;
+  int request_count_;
+  StunMessage* response_;
+  bool success_;
+  bool failure_;
+  bool timeout_;
+};
+
+// Forwards results to the test class.
+class StunRequestThunker : public StunRequest {
+ public:
+  StunRequestThunker(StunRequestManager& manager, StunRequestTest* test)
+      : StunRequest(manager, CreateStunMessage(STUN_BINDING_REQUEST)),
+        test_(test) {}
+
+  std::unique_ptr<StunMessage> CreateResponseMessage(StunMessageType type) {
+    return CreateStunMessage(type, msg());
+  }
+
+ private:
+  virtual void OnResponse(StunMessage* res) { test_->OnResponse(res); }
+  virtual void OnErrorResponse(StunMessage* res) {
+    test_->OnErrorResponse(res);
+  }
+  virtual void OnTimeout() { test_->OnTimeout(); }
+
+  StunRequestTest* test_;
+};
+
+// Test handling of a normal binding response.
+TEST_F(StunRequestTest, TestSuccess) {
+  auto* request = new StunRequestThunker(manager_, this);
+  std::unique_ptr<StunMessage> res =
+      request->CreateResponseMessage(STUN_BINDING_RESPONSE);
+  manager_.Send(request);
+  EXPECT_TRUE(manager_.CheckResponse(res.get()));
+
+  EXPECT_TRUE(response_ == res.get());
+  EXPECT_TRUE(success_);
+  EXPECT_FALSE(failure_);
+  EXPECT_FALSE(timeout_);
+}
+
+// Test handling of an error binding response.
+TEST_F(StunRequestTest, TestError) {
+  auto* request = new StunRequestThunker(manager_, this);
+  std::unique_ptr<StunMessage> res =
+      request->CreateResponseMessage(STUN_BINDING_ERROR_RESPONSE);
+  manager_.Send(request);
+  EXPECT_TRUE(manager_.CheckResponse(res.get()));
+
+  EXPECT_TRUE(response_ == res.get());
+  EXPECT_FALSE(success_);
+  EXPECT_TRUE(failure_);
+  EXPECT_FALSE(timeout_);
+}
+
+// Test handling of a binding response with the wrong transaction id.
+TEST_F(StunRequestTest, TestUnexpected) {
+  auto* request = new StunRequestThunker(manager_, this);
+  std::unique_ptr<StunMessage> res = CreateStunMessage(STUN_BINDING_RESPONSE);
+
+  manager_.Send(request);
+  EXPECT_FALSE(manager_.CheckResponse(res.get()));
+
+  EXPECT_TRUE(response_ == NULL);
+  EXPECT_FALSE(success_);
+  EXPECT_FALSE(failure_);
+  EXPECT_FALSE(timeout_);
+}
+
+// Test that requests are sent at the right times.
+TEST_F(StunRequestTest, TestBackoff) {
+  rtc::ScopedFakeClock fake_clock;
+  auto* request = new StunRequestThunker(manager_, this);
+  std::unique_ptr<StunMessage> res =
+      request->CreateResponseMessage(STUN_BINDING_RESPONSE);
+
+  int64_t start = rtc::TimeMillis();
+  manager_.Send(request);
+  for (int i = 0; i < 9; ++i) {
+    EXPECT_TRUE_SIMULATED_WAIT(request_count_ != i, STUN_TOTAL_TIMEOUT,
+                               fake_clock);
+    int64_t elapsed = rtc::TimeMillis() - start;
+    RTC_DLOG(LS_INFO) << "STUN request #" << (i + 1) << " sent at " << elapsed
+                      << " ms";
+    EXPECT_EQ(TotalDelay(i), elapsed);
+  }
+  EXPECT_TRUE(manager_.CheckResponse(res.get()));
+
+  EXPECT_TRUE(response_ == res.get());
+  EXPECT_TRUE(success_);
+  EXPECT_FALSE(failure_);
+  EXPECT_FALSE(timeout_);
+}
+
+// Test that we timeout properly if no response is received.
+TEST_F(StunRequestTest, TestTimeout) {
+  rtc::ScopedFakeClock fake_clock;
+  auto* request = new StunRequestThunker(manager_, this);
+  std::unique_ptr<StunMessage> res =
+      request->CreateResponseMessage(STUN_BINDING_RESPONSE);
+
+  manager_.Send(request);
+  SIMULATED_WAIT(false, cricket::STUN_TOTAL_TIMEOUT, fake_clock);
+
+  EXPECT_FALSE(manager_.CheckResponse(res.get()));
+  EXPECT_TRUE(response_ == NULL);
+  EXPECT_FALSE(success_);
+  EXPECT_FALSE(failure_);
+  EXPECT_TRUE(timeout_);
+}
+
+// Regression test for specific crash where we receive a response with the
+// same id as a request that doesn't have an underlying StunMessage yet.
+TEST_F(StunRequestTest, TestNoEmptyRequest) {
+  StunRequestThunker* request = new StunRequestThunker(manager_, this);
+
+  manager_.SendDelayed(request, 100);
+
+  StunMessage dummy_req(0, request->id());
+  std::unique_ptr<StunMessage> res =
+      CreateStunMessage(STUN_BINDING_RESPONSE, &dummy_req);
+
+  EXPECT_TRUE(manager_.CheckResponse(res.get()));
+
+  EXPECT_TRUE(response_ == res.get());
+  EXPECT_TRUE(success_);
+  EXPECT_FALSE(failure_);
+  EXPECT_FALSE(timeout_);
+}
+
+// If the response contains an attribute in the "comprehension required" range
+// which is not recognized, the transaction should be considered a failure and
+// the response should be ignored.
+TEST_F(StunRequestTest, TestUnrecognizedComprehensionRequiredAttribute) {
+  auto* request = new StunRequestThunker(manager_, this);
+  std::unique_ptr<StunMessage> res =
+      request->CreateResponseMessage(STUN_BINDING_ERROR_RESPONSE);
+
+  manager_.Send(request);
+  res->AddAttribute(StunAttribute::CreateUInt32(0x7777));
+  EXPECT_FALSE(manager_.CheckResponse(res.get()));
+
+  EXPECT_EQ(nullptr, response_);
+  EXPECT_FALSE(success_);
+  EXPECT_FALSE(failure_);
+  EXPECT_FALSE(timeout_);
+}
+
+}  // namespace cricket