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Merge pull request #4306 from ReinUsesLisp/bsd-network 

core/network: Add network abstraction
nce_cpp
David 6 years ago
committed by GitHub
parent
2e4a5d2110 fc8ff7f4ef
commit
9263c9af72
5 changed files with 840 additions and 0 deletions
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  1. 3
      src/core/CMakeLists.txt
  2. 4
      src/core/core.cpp
  3. 652
      src/core/network/network.cpp
  4. 87
      src/core/network/network.h
  5. 94
      src/core/network/sockets.h

3
src/core/CMakeLists.txt
View File

@ -586,6 +586,9 @@ add_library(core STATIC
memory/dmnt_cheat_vm.h
memory.cpp
memory.h
network/network.cpp
network/network.h
network/sockets.h
perf_stats.cpp
perf_stats.h
reporter.cpp

4
src/core/core.cpp
View File

@ -43,6 +43,7 @@
#include "core/loader/loader.h"
#include "core/memory.h"
#include "core/memory/cheat_engine.h"
#include "core/network/network.h"
#include "core/perf_stats.h"
#include "core/reporter.h"
#include "core/settings.h"
@ -394,6 +395,9 @@ struct System::Impl {
/// Telemetry session for this emulation session
std::unique_ptr<Core::TelemetrySession> telemetry_session;
/// Network instance
Network::NetworkInstance network_instance;
ResultStatus status = ResultStatus::Success;
std::string status_details = "";

652
src/core/network/network.cpp
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@ -0,0 +1,652 @@
// Copyright 2020 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <cstring>
#include <limits>
#include <utility>
#include <vector>
#ifdef _WIN32
#define _WINSOCK_DEPRECATED_NO_WARNINGS // gethostname
#include <winsock2.h>
#elif __unix__
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <poll.h>
#include <unistd.h>
#else
#error "Unimplemented platform"
#endif
#include "common/assert.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "core/network/network.h"
#include "core/network/sockets.h"
namespace Network {
namespace {
#ifdef _WIN32
using socklen_t = int;
void Initialize() {
WSADATA wsa_data;
(void)WSAStartup(MAKEWORD(2, 2), &wsa_data);
}
void Finalize() {
WSACleanup();
}
constexpr IPv4Address TranslateIPv4(in_addr addr) {
auto& bytes = addr.S_un.S_un_b;
return IPv4Address{bytes.s_b1, bytes.s_b2, bytes.s_b3, bytes.s_b4};
}
sockaddr TranslateFromSockAddrIn(SockAddrIn input) {
sockaddr_in result;
#ifdef __unix__
result.sin_len = sizeof(result);
#endif
switch (static_cast<Domain>(input.family)) {
case Domain::INET:
result.sin_family = AF_INET;
break;
default:
UNIMPLEMENTED_MSG("Unhandled sockaddr family={}", static_cast<int>(input.family));
result.sin_family = AF_INET;
break;
}
result.sin_port = htons(input.portno);
auto& ip = result.sin_addr.S_un.S_un_b;
ip.s_b1 = input.ip[0];
ip.s_b2 = input.ip[1];
ip.s_b3 = input.ip[2];
ip.s_b4 = input.ip[3];
sockaddr addr;
std::memcpy(&addr, &result, sizeof(addr));
return addr;
}
LINGER MakeLinger(bool enable, u32 linger_value) {
ASSERT(linger_value <= std::numeric_limits<u_short>::max());
LINGER value;
value.l_onoff = enable ? 1 : 0;
value.l_linger = static_cast<u_short>(linger_value);
return value;
}
int LastError() {
return WSAGetLastError();
}
bool EnableNonBlock(SOCKET fd, bool enable) {
u_long value = enable ? 1 : 0;
return ioctlsocket(fd, FIONBIO, &value) != SOCKET_ERROR;
}
#elif __unix__ // ^ _WIN32 v __unix__
using SOCKET = int;
using WSAPOLLFD = pollfd;
using ULONG = u64;
constexpr SOCKET INVALID_SOCKET = -1;
constexpr SOCKET SOCKET_ERROR = -1;
constexpr int WSAEWOULDBLOCK = EAGAIN;
constexpr int WSAENOTCONN = ENOTCONN;
constexpr int SD_RECEIVE = SHUT_RD;
constexpr int SD_SEND = SHUT_WR;
constexpr int SD_BOTH = SHUT_RDWR;
void Initialize() {}
void Finalize() {}
constexpr IPv4Address TranslateIPv4(in_addr addr) {
const u32 bytes = addr.s_addr;
return IPv4Address{static_cast<u8>(bytes), static_cast<u8>(bytes >> 8),
static_cast<u8>(bytes >> 16), static_cast<u8>(bytes >> 24)};
}
sockaddr TranslateFromSockAddrIn(SockAddrIn input) {
sockaddr_in result;
switch (static_cast<Domain>(input.family)) {
case Domain::INET:
result.sin_family = AF_INET;
break;
default:
UNIMPLEMENTED_MSG("Unhandled sockaddr family={}", static_cast<int>(input.family));
result.sin_family = AF_INET;
break;
}
result.sin_port = htons(input.portno);
result.sin_addr.s_addr = input.ip[0] | input.ip[1] << 8 | input.ip[2] << 16 | input.ip[3] << 24;
sockaddr addr;
std::memcpy(&addr, &result, sizeof(addr));
return addr;
}
int WSAPoll(WSAPOLLFD* fds, ULONG nfds, int timeout) {
return poll(fds, nfds, timeout);
}
int closesocket(SOCKET fd) {
return close(fd);
}
linger MakeLinger(bool enable, u32 linger_value) {
linger value;
value.l_onoff = enable ? 1 : 0;
value.l_linger = linger_value;
return value;
}
int LastError() {
return errno;
}
bool EnableNonBlock(int fd, bool enable) {
int flags = fcntl(fd, F_GETFD);
if (flags == -1) {
return false;
}
if (enable) {
flags |= O_NONBLOCK;
} else {
flags &= ~O_NONBLOCK;
}
return fcntl(fd, F_SETFD, flags) == 0;
}
#endif
int TranslateDomain(Domain domain) {
switch (domain) {
case Domain::INET:
return AF_INET;
default:
UNIMPLEMENTED_MSG("Unimplemented domain={}", static_cast<int>(domain));
return 0;
}
}
int TranslateType(Type type) {
switch (type) {
case Type::STREAM:
return SOCK_STREAM;
case Type::DGRAM:
return SOCK_DGRAM;
default:
UNIMPLEMENTED_MSG("Unimplemented type={}", static_cast<int>(type));
return 0;
}
}
int TranslateProtocol(Protocol protocol) {
switch (protocol) {
case Protocol::TCP:
return IPPROTO_TCP;
case Protocol::UDP:
return IPPROTO_UDP;
default:
UNIMPLEMENTED_MSG("Unimplemented protocol={}", static_cast<int>(protocol));
return 0;
}
}
SockAddrIn TranslateToSockAddrIn(sockaddr input_) {
sockaddr_in input;
std::memcpy(&input, &input_, sizeof(input));
SockAddrIn result;
switch (input.sin_family) {
case AF_INET:
result.family = Domain::INET;
break;
default:
UNIMPLEMENTED_MSG("Unhandled sockaddr family={}", input.sin_family);
result.family = Domain::INET;
break;
}
result.portno = ntohs(input.sin_port);
result.ip = TranslateIPv4(input.sin_addr);
return result;
}
u16 TranslatePollEvents(u16 events) {
u16 result = 0;
if (events & POLL_IN) {
events &= ~POLL_IN;
result |= POLLIN;
}
if (events & POLL_PRI) {
events &= ~POLL_PRI;
#ifdef _WIN32
LOG_WARNING(Service, "Winsock doesn't support POLLPRI");
#else
result |= POLL_PRI;
#endif
}
if (events & POLL_OUT) {
events &= ~POLL_OUT;
result |= POLLOUT;
}
UNIMPLEMENTED_IF_MSG(events != 0, "Unhandled guest events=0x{:x}", events);
return result;
}
u16 TranslatePollRevents(u16 revents) {
u16 result = 0;
const auto translate = [&result, &revents](int host, unsigned guest) {
if (revents & host) {
revents &= ~host;
result |= guest;
}
};
translate(POLLIN, POLL_IN);
translate(POLLPRI, POLL_PRI);
translate(POLLOUT, POLL_OUT);
translate(POLLERR, POLL_ERR);
translate(POLLHUP, POLL_HUP);
UNIMPLEMENTED_IF_MSG(revents != 0, "Unhandled host revents=0x{:x}", revents);
return result;
}
template <typename T>
Errno SetSockOpt(SOCKET fd, int option, T value) {
const int result =
setsockopt(fd, SOL_SOCKET, option, reinterpret_cast<const char*>(&value), sizeof(value));
if (result != SOCKET_ERROR) {
return Errno::SUCCESS;
}
const int ec = LastError();
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return Errno::SUCCESS;
}
} // Anonymous namespace
NetworkInstance::NetworkInstance() {
Initialize();
}
NetworkInstance::~NetworkInstance() {
Finalize();
}
std::pair<IPv4Address, Errno> GetHostIPv4Address() {
std::array<char, 256> name{};
if (gethostname(name.data(), static_cast<int>(name.size()) - 1) == SOCKET_ERROR) {
UNIMPLEMENTED_MSG("Unhandled gethostname error");
return {IPv4Address{}, Errno::SUCCESS};
}
hostent* const ent = gethostbyname(name.data());
if (!ent) {
UNIMPLEMENTED_MSG("Unhandled gethostbyname error");
return {IPv4Address{}, Errno::SUCCESS};
}
if (ent->h_addr_list == nullptr) {
UNIMPLEMENTED_MSG("No addr provided in hostent->h_addr_list");
return {IPv4Address{}, Errno::SUCCESS};
}
if (ent->h_length != sizeof(in_addr)) {
UNIMPLEMENTED_MSG("Unexpected size={} in hostent->h_length", ent->h_length);
}
in_addr addr;
std::memcpy(&addr, ent->h_addr_list[0], sizeof(addr));
return {TranslateIPv4(addr), Errno::SUCCESS};
}
std::pair<s32, Errno> Poll(std::vector<PollFD>& pollfds, s32 timeout) {
const size_t num = pollfds.size();
std::vector<WSAPOLLFD> host_pollfds(pollfds.size());
std::transform(pollfds.begin(), pollfds.end(), host_pollfds.begin(), [](PollFD fd) {
WSAPOLLFD result;
result.fd = fd.socket->fd;
result.events = TranslatePollEvents(fd.events);
result.revents = 0;
return result;
});
const int result = WSAPoll(host_pollfds.data(), static_cast<ULONG>(num), timeout);
if (result == 0) {
ASSERT(std::all_of(host_pollfds.begin(), host_pollfds.end(),
[](WSAPOLLFD fd) { return fd.revents == 0; }));
return {0, Errno::SUCCESS};
}
for (size_t i = 0; i < num; ++i) {
pollfds[i].revents = TranslatePollRevents(host_pollfds[i].revents);
}
if (result > 0) {
return {result, Errno::SUCCESS};
}
ASSERT(result == SOCKET_ERROR);
const int ec = LastError();
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return {-1, Errno::SUCCESS};
}
Socket::~Socket() {
if (fd == INVALID_SOCKET) {
return;
}
(void)closesocket(fd);
fd = INVALID_SOCKET;
}
Socket::Socket(Socket&& rhs) noexcept : fd{std::exchange(rhs.fd, INVALID_SOCKET)} {}
Errno Socket::Initialize(Domain domain, Type type, Protocol protocol) {
fd = socket(TranslateDomain(domain), TranslateType(type), TranslateProtocol(protocol));
if (fd != INVALID_SOCKET) {
return Errno::SUCCESS;
}
const int ec = LastError();
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return Errno::SUCCESS;
}
std::pair<Socket::AcceptResult, Errno> Socket::Accept() {
sockaddr addr;
socklen_t addrlen = sizeof(addr);
const SOCKET new_socket = accept(fd, &addr, &addrlen);
if (new_socket == INVALID_SOCKET) {
const int ec = LastError();
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return {AcceptResult{}, Errno::SUCCESS};
}
AcceptResult result;
result.socket = std::make_unique<Socket>();
result.socket->fd = new_socket;
ASSERT(addrlen == sizeof(sockaddr_in));
result.sockaddr_in = TranslateToSockAddrIn(addr);
return {std::move(result), Errno::SUCCESS};
}
Errno Socket::Connect(SockAddrIn addr_in) {
const sockaddr host_addr_in = TranslateFromSockAddrIn(addr_in);
if (connect(fd, &host_addr_in, sizeof(host_addr_in)) != INVALID_SOCKET) {
return Errno::SUCCESS;
}
switch (const int ec = LastError()) {
case WSAEWOULDBLOCK:
LOG_DEBUG(Service, "EAGAIN generated");
return Errno::AGAIN;
default:
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return Errno::SUCCESS;
}
}
std::pair<SockAddrIn, Errno> Socket::GetPeerName() {
sockaddr addr;
socklen_t addrlen = sizeof(addr);
if (getpeername(fd, &addr, &addrlen) == SOCKET_ERROR) {
const int ec = LastError();
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return {SockAddrIn{}, Errno::SUCCESS};
}
ASSERT(addrlen == sizeof(sockaddr_in));
return {TranslateToSockAddrIn(addr), Errno::SUCCESS};
}
std::pair<SockAddrIn, Errno> Socket::GetSockName() {
sockaddr addr;
socklen_t addrlen = sizeof(addr);
if (getsockname(fd, &addr, &addrlen) == SOCKET_ERROR) {
const int ec = LastError();
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return {SockAddrIn{}, Errno::SUCCESS};
}
ASSERT(addrlen == sizeof(sockaddr_in));
return {TranslateToSockAddrIn(addr), Errno::SUCCESS};
}
Errno Socket::Bind(SockAddrIn addr) {
const sockaddr addr_in = TranslateFromSockAddrIn(addr);
if (bind(fd, &addr_in, sizeof(addr_in)) != SOCKET_ERROR) {
return Errno::SUCCESS;
}
const int ec = LastError();
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return Errno::SUCCESS;
}
Errno Socket::Listen(s32 backlog) {
if (listen(fd, backlog) != SOCKET_ERROR) {
return Errno::SUCCESS;
}
const int ec = LastError();
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return Errno::SUCCESS;
}
Errno Socket::Shutdown(ShutdownHow how) {
int host_how = 0;
switch (how) {
case ShutdownHow::RD:
host_how = SD_RECEIVE;
break;
case ShutdownHow::WR:
host_how = SD_SEND;
break;
case ShutdownHow::RDWR:
host_how = SD_BOTH;
break;
default:
UNIMPLEMENTED_MSG("Unimplemented flag how={}", static_cast<int>(how));
return Errno::SUCCESS;
}
if (shutdown(fd, host_how) != SOCKET_ERROR) {
return Errno::SUCCESS;
}
switch (const int ec = LastError()) {
case WSAENOTCONN:
LOG_ERROR(Service, "ENOTCONN generated");
return Errno::NOTCONN;
default:
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return Errno::SUCCESS;
}
}
std::pair<s32, Errno> Socket::Recv(int flags, std::vector<u8>& message) {
ASSERT(flags == 0);
ASSERT(message.size() < static_cast<size_t>(std::numeric_limits<int>::max()));
const int result =
recv(fd, reinterpret_cast<char*>(message.data()), static_cast<int>(message.size()), 0);
if (result != SOCKET_ERROR) {
return {result, Errno::SUCCESS};
}
switch (const int ec = LastError()) {
case WSAEWOULDBLOCK:
LOG_DEBUG(Service, "EAGAIN generated");
return {-1, Errno::AGAIN};
case WSAENOTCONN:
LOG_ERROR(Service, "ENOTCONN generated");
return {-1, Errno::NOTCONN};
default:
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return {0, Errno::SUCCESS};
}
}
std::pair<s32, Errno> Socket::RecvFrom(int flags, std::vector<u8>& message, SockAddrIn* addr) {
ASSERT(flags == 0);
ASSERT(message.size() < static_cast<size_t>(std::numeric_limits<int>::max()));
sockaddr addr_in{};
socklen_t addrlen = sizeof(addr_in);
socklen_t* const p_addrlen = addr ? &addrlen : nullptr;
sockaddr* const p_addr_in = addr ? &addr_in : nullptr;
const int result = recvfrom(fd, reinterpret_cast<char*>(message.data()),
static_cast<int>(message.size()), 0, p_addr_in, p_addrlen);
if (result != SOCKET_ERROR) {
if (addr) {
ASSERT(addrlen == sizeof(addr_in));
*addr = TranslateToSockAddrIn(addr_in);
}
return {result, Errno::SUCCESS};
}
switch (const int ec = LastError()) {
case WSAEWOULDBLOCK:
LOG_DEBUG(Service, "EAGAIN generated");
return {-1, Errno::AGAIN};
case WSAENOTCONN:
LOG_ERROR(Service, "ENOTCONN generated");
return {-1, Errno::NOTCONN};
default:
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return {-1, Errno::SUCCESS};
}
}
std::pair<s32, Errno> Socket::Send(const std::vector<u8>& message, int flags) {
ASSERT(message.size() < static_cast<size_t>(std::numeric_limits<int>::max()));
ASSERT(flags == 0);
const int result = send(fd, reinterpret_cast<const char*>(message.data()),
static_cast<int>(message.size()), 0);
if (result != SOCKET_ERROR) {
return {result, Errno::SUCCESS};
}
const int ec = LastError();
switch (ec) {
case WSAEWOULDBLOCK:
LOG_DEBUG(Service, "EAGAIN generated");
return {-1, Errno::AGAIN};
case WSAENOTCONN:
LOG_ERROR(Service, "ENOTCONN generated");
return {-1, Errno::NOTCONN};
default:
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return {-1, Errno::SUCCESS};
}
}
std::pair<s32, Errno> Socket::SendTo(u32 flags, const std::vector<u8>& message,
const SockAddrIn* addr) {
ASSERT(flags == 0);
const sockaddr* to = nullptr;
const int tolen = addr ? 0 : sizeof(sockaddr);
sockaddr host_addr_in;
if (addr) {
host_addr_in = TranslateFromSockAddrIn(*addr);
to = &host_addr_in;
}
const int result = sendto(fd, reinterpret_cast<const char*>(message.data()),
static_cast<int>(message.size()), 0, to, tolen);
if (result != SOCKET_ERROR) {
return {result, Errno::SUCCESS};
}
const int ec = LastError();
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return {-1, Errno::SUCCESS};
}
Errno Socket::Close() {
[[maybe_unused]] const int result = closesocket(fd);
ASSERT(result == 0);
fd = INVALID_SOCKET;
return Errno::SUCCESS;
}
Errno Socket::SetLinger(bool enable, u32 linger) {
return SetSockOpt(fd, SO_LINGER, MakeLinger(enable, linger));
}
Errno Socket::SetReuseAddr(bool enable) {
return SetSockOpt<u32>(fd, SO_REUSEADDR, enable ? 1 : 0);
}
Errno Socket::SetBroadcast(bool enable) {
return SetSockOpt<u32>(fd, SO_BROADCAST, enable ? 1 : 0);
}
Errno Socket::SetSndBuf(u32 value) {
return SetSockOpt(fd, SO_SNDBUF, value);
}
Errno Socket::SetRcvBuf(u32 value) {
return SetSockOpt(fd, SO_RCVBUF, value);
}
Errno Socket::SetSndTimeo(u32 value) {
return SetSockOpt(fd, SO_SNDTIMEO, value);
}
Errno Socket::SetRcvTimeo(u32 value) {
return SetSockOpt(fd, SO_RCVTIMEO, value);
}
Errno Socket::SetNonBlock(bool enable) {
if (EnableNonBlock(fd, enable)) {
return Errno::SUCCESS;
}
const int ec = LastError();
UNREACHABLE_MSG("Unhandled host socket error={}", ec);
return Errno::SUCCESS;
}
bool Socket::IsOpened() const {
return fd != INVALID_SOCKET;
}
} // namespace Network

87
src/core/network/network.h
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@ -0,0 +1,87 @@
// Copyright 2020 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <utility>
#include "common/common_types.h"
namespace Network {
class Socket;
/// Error code for network functions
enum class Errno {
SUCCESS,
BADF,
INVAL,
MFILE,
NOTCONN,
AGAIN,
};
/// Address families
enum class Domain {
INET, ///< Address family for IPv4
};
/// Socket types
enum class Type {
STREAM,
DGRAM,
RAW,
SEQPACKET,
};
/// Protocol values for sockets
enum class Protocol {
ICMP,
TCP,
UDP,
};
/// Shutdown mode
enum class ShutdownHow {
RD,
WR,
RDWR,
};
/// Array of IPv4 address
using IPv4Address = std::array<u8, 4>;
/// Cross-platform sockaddr structure
struct SockAddrIn {
Domain family;
IPv4Address ip;
u16 portno;
};
/// Cross-platform poll fd structure
struct PollFD {
Socket* socket;
u16 events;
u16 revents;
};
constexpr u16 POLL_IN = 1 << 0;
constexpr u16 POLL_PRI = 1 << 1;
constexpr u16 POLL_OUT = 1 << 2;
constexpr u16 POLL_ERR = 1 << 3;
constexpr u16 POLL_HUP = 1 << 4;
constexpr u16 POLL_NVAL = 1 << 5;
class NetworkInstance {
public:
explicit NetworkInstance();
~NetworkInstance();
};
/// @brief Returns host's IPv4 address
/// @return Pair of an array of human ordered IPv4 address (e.g. 192.168.0.1) and an error code
std::pair<IPv4Address, Errno> GetHostIPv4Address();
} // namespace Network

94
src/core/network/sockets.h
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@ -0,0 +1,94 @@
// Copyright 2020 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <memory>
#include <utility>
#if defined(_WIN32)
#include <winsock.h>
#elif !defined(__unix__)
#error "Platform not implemented"
#endif
#include "common/common_types.h"
#include "core/network/network.h"
// TODO: C++20 Replace std::vector usages with std::span
namespace Network {
class Socket {
public:
struct AcceptResult {
std::unique_ptr<Socket> socket;
SockAddrIn sockaddr_in;
};
explicit Socket() = default;
~Socket();
Socket(const Socket&) = delete;
Socket& operator=(const Socket&) = delete;
Socket(Socket&& rhs) noexcept;
// Avoid closing sockets implicitly
Socket& operator=(Socket&&) noexcept = delete;
Errno Initialize(Domain domain, Type type, Protocol protocol);
Errno Close();
std::pair<AcceptResult, Errno> Accept();
Errno Connect(SockAddrIn addr_in);
std::pair<SockAddrIn, Errno> GetPeerName();
std::pair<SockAddrIn, Errno> GetSockName();
Errno Bind(SockAddrIn addr);
Errno Listen(s32 backlog);
Errno Shutdown(ShutdownHow how);
std::pair<s32, Errno> Recv(int flags, std::vector<u8>& message);
std::pair<s32, Errno> RecvFrom(int flags, std::vector<u8>& message, SockAddrIn* addr);
std::pair<s32, Errno> Send(const std::vector<u8>& message, int flags);
std::pair<s32, Errno> SendTo(u32 flags, const std::vector<u8>& message, const SockAddrIn* addr);
Errno SetLinger(bool enable, u32 linger);
Errno SetReuseAddr(bool enable);
Errno SetBroadcast(bool enable);
Errno SetSndBuf(u32 value);
Errno SetRcvBuf(u32 value);
Errno SetSndTimeo(u32 value);
Errno SetRcvTimeo(u32 value);
Errno SetNonBlock(bool enable);
bool IsOpened() const;
#if defined(_WIN32)
SOCKET fd = INVALID_SOCKET;
#elif defined(__unix__)
int fd = -1;
#endif
};
std::pair<s32, Errno> Poll(std::vector<PollFD>& poll_fds, s32 timeout);
} // namespace Network
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