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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/test_kit.h>
#include <vespa/vespalib/testkit/time_bomb.h>
#include <vespa/fnet/transport.h>
#include <vespa/fnet/transport_thread.h>
#include <vespa/fnet/simplepacketstreamer.h>
#include <vespa/fnet/ipackethandler.h>
#include <vespa/fnet/connection.h>
#include <vespa/fnet/controlpacket.h>
#include <vespa/vespalib/net/server_socket.h>
#include <vespa/vespalib/net/crypto_engine.h>
#include <vespa/vespalib/util/size_literals.h>
#include <vespa/vespalib/util/stringfmt.h>
using namespace vespalib;
constexpr vespalib::duration short_time = 20ms;
struct BlockingHostResolver : public AsyncResolver::HostResolver {
AsyncResolver::SimpleHostResolver resolver;
Gate caller;
Gate barrier;
BlockingHostResolver() : resolver(), caller(), barrier() {}
vespalib::string ip_address(const vespalib::string &host) override {
fprintf(stderr, "blocking resolve request: '%s'\n", host.c_str());
caller.countDown();
barrier.await();
vespalib::string result = resolver.ip_address(host);
fprintf(stderr, "returning resolve result: '%s'\n", result.c_str());
return result;
}
void wait_for_caller() { caller.await(); }
void release_caller() { barrier.countDown(); }
};
AsyncResolver::SP make_resolver(AsyncResolver::HostResolver::SP host_resolver) {
AsyncResolver::Params params;
params.resolver = host_resolver;
return AsyncResolver::create(params);
}
//-----------------------------------------------------------------------------
struct BlockingCryptoSocket : public CryptoSocket {
SocketHandle socket;
Gate &handshake_work_enter;
Gate &handshake_work_exit;
Gate &handshake_socket_deleted;
BlockingCryptoSocket(SocketHandle s, Gate &hs_work_enter, Gate &hs_work_exit, Gate &hs_socket_deleted)
: socket(std::move(s)), handshake_work_enter(hs_work_enter), handshake_work_exit(hs_work_exit),
handshake_socket_deleted(hs_socket_deleted) {}
~BlockingCryptoSocket() override {
handshake_socket_deleted.countDown();
}
int get_fd() const override { return socket.get(); }
HandshakeResult handshake() override { return HandshakeResult::NEED_WORK; }
void do_handshake_work() override {
handshake_work_enter.countDown();
handshake_work_exit.await();
}
size_t min_read_buffer_size() const override { return 1; }
ssize_t read(char *buf, size_t len) override { return socket.read(buf, len); }
ssize_t drain(char *, size_t) override { return 0; }
ssize_t write(const char *buf, size_t len) override { return socket.write(buf, len); }
ssize_t flush() override { return 0; }
ssize_t half_close() override { return socket.half_close(); }
void drop_empty_buffers() override {}
};
struct BlockingCryptoEngine : public CryptoEngine {
Gate handshake_work_enter;
Gate handshake_work_exit;
Gate handshake_socket_deleted;
bool use_tls_when_client() const override { return false; }
bool always_use_tls_when_server() const override { return false; }
CryptoSocket::UP create_client_crypto_socket(SocketHandle socket, const SocketSpec &) override {
return std::make_unique<BlockingCryptoSocket>(std::move(socket),
handshake_work_enter, handshake_work_exit, handshake_socket_deleted);
}
CryptoSocket::UP create_server_crypto_socket(SocketHandle socket) override {
return std::make_unique<BlockingCryptoSocket>(std::move(socket),
handshake_work_enter, handshake_work_exit, handshake_socket_deleted);
}
};
//-----------------------------------------------------------------------------
struct TransportFixture : FNET_IPacketHandler {
FNET_SimplePacketStreamer streamer;
FNET_Transport transport;
Gate conn_lost;
TransportFixture() : streamer(nullptr), transport(), conn_lost() {
transport.Start();
}
TransportFixture(AsyncResolver::HostResolver::SP host_resolver)
: streamer(nullptr), transport(fnet::TransportConfig().resolver(make_resolver(std::move(host_resolver)))),
conn_lost()
{
transport.Start();
}
TransportFixture(CryptoEngine::SP crypto)
: streamer(nullptr), transport(fnet::TransportConfig().crypto(std::move(crypto))),
conn_lost()
{
transport.Start();
}
HP_RetCode HandlePacket(FNET_Packet *packet, FNET_Context) override {
ASSERT_TRUE(packet->GetCommand() == FNET_ControlPacket::FNET_CMD_CHANNEL_LOST);
conn_lost.countDown();
packet->Free();
return FNET_FREE_CHANNEL;
}
FNET_Connection *connect(const vespalib::string &spec) {
FNET_Connection *conn = transport.Connect(spec.c_str(), &streamer);
ASSERT_TRUE(conn != nullptr);
if (conn->OpenChannel(this, FNET_Context()) == nullptr) {
conn_lost.countDown();
}
return conn;
}
~TransportFixture() override {
transport.ShutDown(true);
}
};
//-----------------------------------------------------------------------------
struct ConnCheck {
uint64_t target;
ConnCheck() : target(FNET_Connection::get_num_connections()) {
EXPECT_EQUAL(target, uint64_t(0));
}
bool at_target() const { return (FNET_Connection::get_num_connections() == target); };
bool await(duration max_wait) const {
auto until = saturated_add(steady_clock::now(), max_wait);
while (!at_target() && steady_clock::now() < until) {
std::this_thread::sleep_for(1ms);
}
return at_target();
}
void await() const {
ASSERT_TRUE(await(3600s));
}
};
TEST_MT_FFFF("require that normal connect works", 2,
ServerSocket("tcp/0"), TransportFixture(), ConnCheck(), TimeBomb(60))
{
if (thread_id == 0) {
SocketHandle socket = f1.accept();
EXPECT_TRUE(socket.valid());
TEST_BARRIER();
} else {
vespalib::string spec = make_string("tcp/localhost:%d", f1.address().port());
FNET_Connection *conn = f2.connect(spec);
TEST_BARRIER();
conn->Owner()->Close(conn);
f2.conn_lost.await();
EXPECT_TRUE(!f3.await(short_time));
conn->internal_subref();
f3.await();
}
}
TEST_FFF("require that bogus connect fail asynchronously", TransportFixture(), ConnCheck(), TimeBomb(60)) {
FNET_Connection *conn = f1.connect("invalid");
f1.conn_lost.await();
EXPECT_TRUE(!f2.await(short_time));
conn->internal_subref();
f2.await();
}
TEST_MT_FFFFF("require that async close can be called before async resolve completes", 2,
ServerSocket("tcp/0"), std::shared_ptr<BlockingHostResolver>(new BlockingHostResolver()),
TransportFixture(f2), ConnCheck(), TimeBomb(60))
{
if (thread_id == 0) {
SocketHandle socket = f1.accept();
EXPECT_TRUE(!socket.valid());
} else {
vespalib::string spec = make_string("tcp/localhost:%d", f1.address().port());
FNET_Connection *conn = f3.connect(spec);
f2->wait_for_caller();
conn->Owner()->Close(conn);
f3.conn_lost.await();
f2->release_caller();
EXPECT_TRUE(!f4.await(short_time));
conn->internal_subref();
f4.await();
f1.shutdown();
}
}
TEST_MT_FFFFF("require that async close during async do_handshake_work works", 2,
ServerSocket("tcp/0"), std::shared_ptr<BlockingCryptoEngine>(new BlockingCryptoEngine()),
TransportFixture(f2), ConnCheck(), TimeBomb(60))
{
if (thread_id == 0) {
SocketHandle socket = f1.accept();
EXPECT_TRUE(socket.valid());
TEST_BARRIER(); // #1
} else {
vespalib::string spec = make_string("tcp/localhost:%d", f1.address().port());
FNET_Connection *conn = f3.connect(spec);
f2->handshake_work_enter.await();
conn->Owner()->Close(conn, false);
conn = nullptr; // ref given away
f3.conn_lost.await();
TEST_BARRIER(); // #1
// verify that pending work keeps relevant objects alive
EXPECT_TRUE(!f4.await(short_time));
EXPECT_TRUE(!f2->handshake_socket_deleted.await(short_time));
f2->handshake_work_exit.countDown();
f4.await();
f2->handshake_socket_deleted.await();
}
}
TEST_MAIN() { TEST_RUN_ALL(); }
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