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/*
* 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/test/stun_server.h"
#include <string.h>
#include <memory>
#include <string>
#include "absl/memory/memory.h"
#include "api/transport/stun.h"
#include "rtc_base/async_udp_socket.h"
#include "rtc_base/byte_buffer.h"
#include "rtc_base/socket_address.h"
#include "rtc_base/test_client.h"
#include "rtc_base/thread.h"
#include "rtc_base/virtual_socket_server.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
const SocketAddress server_addr("99.99.99.1", 3478);
const SocketAddress client_addr("1.2.3.4", 1234);
} // namespace
class StunServerTest : public ::testing::Test {
public:
StunServerTest() : ss_(new VirtualSocketServer()) {
ss_->SetMessageQueue(&main_thread);
server_.reset(
new StunServer(AsyncUDPSocket::Create(ss_.get(), server_addr)));
client_.reset(new TestClient(
absl::WrapUnique(AsyncUDPSocket::Create(ss_.get(), client_addr))));
}
void Send(const StunMessage& msg) {
ByteBufferWriter buf;
msg.Write(&buf);
Send(reinterpret_cast<const char*>(buf.Data()),
static_cast<int>(buf.Length()));
}
void Send(const char* buf, int len) {
client_->SendTo(buf, len, server_addr);
}
bool ReceiveFails() { return (client_->CheckNoPacket()); }
StunMessage* Receive() {
StunMessage* msg = nullptr;
std::unique_ptr<TestClient::Packet> packet =
client_->NextPacket(TestClient::kTimeoutMs);
if (packet) {
ByteBufferReader buf(packet->buf);
msg = new StunMessage();
msg->Read(&buf);
}
return msg;
}
private:
AutoThread main_thread;
std::unique_ptr<VirtualSocketServer> ss_;
std::unique_ptr<StunServer> server_;
std::unique_ptr<TestClient> client_;
};
TEST_F(StunServerTest, TestGood) {
// kStunLegacyTransactionIdLength = 16 for legacy RFC 3489 request
std::string transaction_id = "0123456789abcdef";
StunMessage req(STUN_BINDING_REQUEST, transaction_id);
Send(req);
StunMessage* msg = Receive();
ASSERT_TRUE(msg != nullptr);
EXPECT_EQ(STUN_BINDING_RESPONSE, msg->type());
EXPECT_EQ(req.transaction_id(), msg->transaction_id());
const StunAddressAttribute* mapped_addr =
msg->GetAddress(STUN_ATTR_MAPPED_ADDRESS);
EXPECT_TRUE(mapped_addr != nullptr);
EXPECT_EQ(1, mapped_addr->family());
EXPECT_EQ(client_addr.port(), mapped_addr->port());
delete msg;
}
TEST_F(StunServerTest, TestGoodXorMappedAddr) {
// kStunTransactionIdLength = 12 for RFC 5389 request
// StunMessage::Write will automatically insert magic cookie (0x2112A442)
std::string transaction_id = "0123456789ab";
StunMessage req(STUN_BINDING_REQUEST, transaction_id);
Send(req);
StunMessage* msg = Receive();
ASSERT_TRUE(msg != nullptr);
EXPECT_EQ(STUN_BINDING_RESPONSE, msg->type());
EXPECT_EQ(req.transaction_id(), msg->transaction_id());
const StunAddressAttribute* mapped_addr =
msg->GetAddress(STUN_ATTR_XOR_MAPPED_ADDRESS);
EXPECT_TRUE(mapped_addr != nullptr);
EXPECT_EQ(1, mapped_addr->family());
EXPECT_EQ(client_addr.port(), mapped_addr->port());
delete msg;
}
// Send legacy RFC 3489 request, should not get xor mapped addr
TEST_F(StunServerTest, TestNoXorMappedAddr) {
// kStunLegacyTransactionIdLength = 16 for legacy RFC 3489 request
std::string transaction_id = "0123456789abcdef";
StunMessage req(STUN_BINDING_REQUEST, transaction_id);
Send(req);
StunMessage* msg = Receive();
ASSERT_TRUE(msg != nullptr);
EXPECT_EQ(STUN_BINDING_RESPONSE, msg->type());
EXPECT_EQ(req.transaction_id(), msg->transaction_id());
const StunAddressAttribute* mapped_addr =
msg->GetAddress(STUN_ATTR_XOR_MAPPED_ADDRESS);
EXPECT_TRUE(mapped_addr == nullptr);
delete msg;
}
TEST_F(StunServerTest, TestBad) {
const char* bad =
"this is a completely nonsensical message whose only "
"purpose is to make the parser go 'ack'. it doesn't "
"look anything like a normal stun message";
Send(bad, static_cast<int>(strlen(bad)));
ASSERT_TRUE(ReceiveFails());
}
} // namespace webrtc
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