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#define _CRT_RAND_S // For Windows, rand_s
#include <array>
#include <chrono>
#include <future>
#include <random>
#include <gtest/gtest.h>
#include "test_env.h"
#ifdef _WIN32
#include <stdlib.h>
#define rand_r rand_s
#define INC_SRT_WIN_WINTIME // exclude gettimeofday from srt headers
#else
typedef int SOCKET;
#define INVALID_SOCKET ((SOCKET)-1)
#define closesocket close
#endif
#include"platform_sys.h"
#include "srt.h"
#include "netinet_any.h"
#include "api.h"
using namespace std;
using srt::sockaddr_any;
class TestConnection
: public ::srt::Test
{
protected:
TestConnection()
{
// initialization code here
}
~TestConnection()
{
// cleanup any pending stuff, but no exceptions allowed
}
// It should be as much as possible, but how many sockets can
// be withstood, depends on the platform. Currently used CI test
// servers seem not to withstand more than 240.
static const size_t NSOCK = 60;
protected:
void setup() override
{
m_sa.sin_family = AF_INET;
m_sa.sin_addr.s_addr = INADDR_ANY;
m_server_sock = srt_create_socket();
ASSERT_NE(m_server_sock, SRT_INVALID_SOCK);
// Find a port not used by another service.
int bind_res = 0;
const sockaddr* psa = reinterpret_cast<const sockaddr*>(&m_sa);
for (int port = 5000; port <= 5100; ++port)
{
m_sa.sin_port = htons(port);
bind_res = srt_bind(m_server_sock, psa, sizeof m_sa);
if (bind_res == 0)
{
cerr << "Running test on port " << port << "\n";
break;
}
}
ASSERT_GE(bind_res, 0) << "srt_bind returned " << bind_res << ": " << srt_getlasterror_str();
ASSERT_EQ(inet_pton(AF_INET, "127.0.0.1", &m_sa.sin_addr), 1);
// Fill the buffer with random data
std::random_device rnd_device;
std::mt19937 gen(rnd_device());
std::uniform_int_distribution<short> dis(-128, 127);
std::generate(m_buf.begin(), m_buf.end(), [dis, gen]() mutable { return (char)dis(gen); });
ASSERT_NE(srt_listen(m_server_sock, NSOCK), -1);
}
void teardown() override
{
}
void AcceptLoop()
{
for (;;)
{
sockaddr_any addr;
int len = sizeof addr;
int acp = srt_accept(m_server_sock, addr.get(), &len);
if (acp == -1)
{
cerr << "[T] Accept error at " << m_accepted.size()
<< "/" << NSOCK << ": " << srt_getlasterror_str() << endl;
break;
}
m_accepted.push_back(acp);
}
cerr << "[T] Closing those accepted ones\n";
m_accept_exit = true;
for (const auto s : m_accepted)
{
srt_close(s);
}
cerr << "[T] End Accept Loop\n";
}
protected:
sockaddr_in m_sa = sockaddr_in();
SRTSOCKET m_server_sock = SRT_INVALID_SOCK;
vector<SRTSOCKET> m_accepted;
std::array<char, SRT_LIVE_DEF_PLSIZE> m_buf;
SRTSOCKET m_connections[NSOCK];
volatile bool m_accept_exit = false;
};
// This test establishes multiple connections to a single SRT listener on a localhost port.
// Packets are submitted for sending to all those connections in a non-blocking mode.
// Then all connections are closed. Some sockets may potentially still have undelivered packets.
// This test tries to reproduce the issue described in #1182, and fixed by #1315.
TEST_F(TestConnection, Multiple)
{
const sockaddr_in lsa = m_sa;
const sockaddr* psa = reinterpret_cast<const sockaddr*>(&lsa);
auto ex = std::async(std::launch::async, [this] { return AcceptLoop(); });
cerr << "Opening " << NSOCK << " connections\n";
bool overall_test = true;
for (size_t i = 0; i < NSOCK; i++)
{
m_connections[i] = srt_create_socket();
EXPECT_NE(m_connections[i], SRT_INVALID_SOCK);
// Give it 60s timeout, many platforms fail to process
// so many connections in a short time.
int conntimeo = 60;
srt_setsockflag(m_connections[i], SRTO_CONNTIMEO, &conntimeo, sizeof conntimeo);
SRTSOCKET connres = SRT_INVALID_SOCK;
//cerr << "Connecting #" << i << " to " << sockaddr_any(psa).str() << "...\n";
//cerr << "Connecting to: " << sockaddr_any(psa).str() << endl;
connres = srt_connect(m_connections[i], psa, sizeof lsa);
EXPECT_NE(connres, SRT_INVALID_SOCK) << "conn #" << i << ": " << srt_getlasterror_str();
if (connres == SRT_INVALID_SOCK)
overall_test = false;
// Set now async sending so that sending isn't blocked
int no = 0;
EXPECT_NE(srt_setsockflag(m_connections[i], SRTO_SNDSYN, &no, sizeof no), -1);
}
for (size_t j = 1; j <= 100; j++)
{
for (size_t i = 0; i < NSOCK; i++)
{
EXPECT_GT(srt_send(m_connections[i], m_buf.data(), (int) m_buf.size()), 0);
}
}
cerr << "Sending finished, closing caller sockets\n";
for (size_t i = 0; i < NSOCK; i++)
{
EXPECT_EQ(srt_close(m_connections[i]), SRT_SUCCESS);
}
EXPECT_FALSE(m_accept_exit) << "AcceptLoop already broken for some reason!";
// Up to this moment the server sock should survive
cerr << "Closing server socket\n";
// Close server socket to break the accept loop
EXPECT_EQ(srt_close(m_server_sock), 0);
cerr << "Synchronize with the accepting thread\n";
ex.wait();
cerr << "Synchronization done\n";
ASSERT_TRUE(overall_test);
}
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