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// Copyright (c) 2021-2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <compat/compat.h>
#include <test/util/setup_common.h>
#include <util/sock.h>
#include <util/system.h>
#include <util/threadinterrupt.h>
#include <boost/test/unit_test.hpp>
#include <cassert>
#include <thread>
using namespace std::chrono_literals;
BOOST_FIXTURE_TEST_SUITE(sock_tests, BasicTestingSetup)
static bool SocketIsClosed(const SOCKET& s)
{
// Notice that if another thread is running and creates its own socket after `s` has been
// closed, it may be assigned the same file descriptor number. In this case, our test will
// wrongly pretend that the socket is not closed.
int type;
socklen_t len = sizeof(type);
return getsockopt(s, SOL_SOCKET, SO_TYPE, (sockopt_arg_type)&type, &len) == SOCKET_ERROR;
}
static SOCKET CreateSocket()
{
const SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
BOOST_REQUIRE(s != static_cast<SOCKET>(SOCKET_ERROR));
return s;
}
BOOST_AUTO_TEST_CASE(constructor_and_destructor)
{
const SOCKET s = CreateSocket();
Sock* sock = new Sock(s);
BOOST_CHECK_EQUAL(sock->Get(), s);
BOOST_CHECK(!SocketIsClosed(s));
delete sock;
BOOST_CHECK(SocketIsClosed(s));
}
BOOST_AUTO_TEST_CASE(move_constructor)
{
const SOCKET s = CreateSocket();
Sock* sock1 = new Sock(s);
Sock* sock2 = new Sock(std::move(*sock1));
delete sock1;
BOOST_CHECK(!SocketIsClosed(s));
BOOST_CHECK_EQUAL(sock2->Get(), s);
delete sock2;
BOOST_CHECK(SocketIsClosed(s));
}
BOOST_AUTO_TEST_CASE(move_assignment)
{
const SOCKET s = CreateSocket();
Sock* sock1 = new Sock(s);
Sock* sock2 = new Sock();
*sock2 = std::move(*sock1);
delete sock1;
BOOST_CHECK(!SocketIsClosed(s));
BOOST_CHECK_EQUAL(sock2->Get(), s);
delete sock2;
BOOST_CHECK(SocketIsClosed(s));
}
#ifndef WIN32 // Windows does not have socketpair(2).
static void CreateSocketPair(int s[2])
{
BOOST_REQUIRE_EQUAL(socketpair(AF_UNIX, SOCK_STREAM, 0, s), 0);
}
static void SendAndRecvMessage(const Sock& sender, const Sock& receiver)
{
const char* msg = "abcd";
constexpr ssize_t msg_len = 4;
char recv_buf[10];
BOOST_CHECK_EQUAL(sender.Send(msg, msg_len, 0), msg_len);
BOOST_CHECK_EQUAL(receiver.Recv(recv_buf, sizeof(recv_buf), 0), msg_len);
BOOST_CHECK_EQUAL(strncmp(msg, recv_buf, msg_len), 0);
}
BOOST_AUTO_TEST_CASE(send_and_receive)
{
int s[2];
CreateSocketPair(s);
Sock* sock0 = new Sock(s[0]);
Sock* sock1 = new Sock(s[1]);
SendAndRecvMessage(*sock0, *sock1);
Sock* sock0moved = new Sock(std::move(*sock0));
Sock* sock1moved = new Sock();
*sock1moved = std::move(*sock1);
delete sock0;
delete sock1;
SendAndRecvMessage(*sock1moved, *sock0moved);
delete sock0moved;
delete sock1moved;
BOOST_CHECK(SocketIsClosed(s[0]));
BOOST_CHECK(SocketIsClosed(s[1]));
}
BOOST_AUTO_TEST_CASE(wait)
{
int s[2];
CreateSocketPair(s);
Sock sock0(s[0]);
Sock sock1(s[1]);
std::thread waiter([&sock0]() { (void)sock0.Wait(24h, Sock::RECV); });
BOOST_REQUIRE_EQUAL(sock1.Send("a", 1, 0), 1);
waiter.join();
}
BOOST_AUTO_TEST_CASE(recv_until_terminator_limit)
{
constexpr auto timeout = 1min; // High enough so that it is never hit.
CThreadInterrupt interrupt;
int s[2];
CreateSocketPair(s);
Sock sock_send(s[0]);
Sock sock_recv(s[1]);
std::thread receiver([&sock_recv, &timeout, &interrupt]() {
constexpr size_t max_data{10};
bool threw_as_expected{false};
// BOOST_CHECK_EXCEPTION() writes to some variables shared with the main thread which
// creates a data race. So mimic it manually.
try {
(void)sock_recv.RecvUntilTerminator('\n', timeout, interrupt, max_data);
} catch (const std::runtime_error& e) {
threw_as_expected = HasReason("too many bytes without a terminator")(e);
}
assert(threw_as_expected);
});
BOOST_REQUIRE_NO_THROW(sock_send.SendComplete("1234567", timeout, interrupt));
BOOST_REQUIRE_NO_THROW(sock_send.SendComplete("89a\n", timeout, interrupt));
receiver.join();
}
#endif /* WIN32 */
BOOST_AUTO_TEST_SUITE_END()
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