diff options
Diffstat (limited to 'src/util/sock.cpp')
-rw-r--r-- | src/util/sock.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/util/sock.cpp b/src/util/sock.cpp new file mode 100644 index 0000000000..4c65b5b680 --- /dev/null +++ b/src/util/sock.cpp @@ -0,0 +1,149 @@ +// Copyright (c) 2020-2021 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.h> +#include <logging.h> +#include <tinyformat.h> +#include <util/sock.h> +#include <util/system.h> +#include <util/time.h> + +#include <codecvt> +#include <cwchar> +#include <locale> +#include <string> + +#ifdef USE_POLL +#include <poll.h> +#endif + +Sock::Sock() : m_socket(INVALID_SOCKET) {} + +Sock::Sock(SOCKET s) : m_socket(s) {} + +Sock::Sock(Sock&& other) +{ + m_socket = other.m_socket; + other.m_socket = INVALID_SOCKET; +} + +Sock::~Sock() { Reset(); } + +Sock& Sock::operator=(Sock&& other) +{ + Reset(); + m_socket = other.m_socket; + other.m_socket = INVALID_SOCKET; + return *this; +} + +SOCKET Sock::Get() const { return m_socket; } + +SOCKET Sock::Release() +{ + const SOCKET s = m_socket; + m_socket = INVALID_SOCKET; + return s; +} + +void Sock::Reset() { CloseSocket(m_socket); } + +ssize_t Sock::Send(const void* data, size_t len, int flags) const +{ + return send(m_socket, static_cast<const char*>(data), len, flags); +} + +ssize_t Sock::Recv(void* buf, size_t len, int flags) const +{ + return recv(m_socket, static_cast<char*>(buf), len, flags); +} + +bool Sock::Wait(std::chrono::milliseconds timeout, Event requested) const +{ +#ifdef USE_POLL + pollfd fd; + fd.fd = m_socket; + fd.events = 0; + if (requested & RECV) { + fd.events |= POLLIN; + } + if (requested & SEND) { + fd.events |= POLLOUT; + } + + return poll(&fd, 1, count_milliseconds(timeout)) != SOCKET_ERROR; +#else + if (!IsSelectableSocket(m_socket)) { + return false; + } + + fd_set fdset_recv; + fd_set fdset_send; + FD_ZERO(&fdset_recv); + FD_ZERO(&fdset_send); + + if (requested & RECV) { + FD_SET(m_socket, &fdset_recv); + } + + if (requested & SEND) { + FD_SET(m_socket, &fdset_send); + } + + timeval timeout_struct = MillisToTimeval(timeout); + + return select(m_socket + 1, &fdset_recv, &fdset_send, nullptr, &timeout_struct) != SOCKET_ERROR; +#endif /* USE_POLL */ +} + +#ifdef WIN32 +std::string NetworkErrorString(int err) +{ + wchar_t buf[256]; + buf[0] = 0; + if(FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_MAX_WIDTH_MASK, + nullptr, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + buf, ARRAYSIZE(buf), nullptr)) + { + return strprintf("%s (%d)", std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>,wchar_t>().to_bytes(buf), err); + } + else + { + return strprintf("Unknown error (%d)", err); + } +} +#else +std::string NetworkErrorString(int err) +{ + char buf[256]; + buf[0] = 0; + /* Too bad there are two incompatible implementations of the + * thread-safe strerror. */ + const char *s; +#ifdef STRERROR_R_CHAR_P /* GNU variant can return a pointer outside the passed buffer */ + s = strerror_r(err, buf, sizeof(buf)); +#else /* POSIX variant always returns message in buffer */ + s = buf; + if (strerror_r(err, buf, sizeof(buf))) + buf[0] = 0; +#endif + return strprintf("%s (%d)", s, err); +} +#endif + +bool CloseSocket(SOCKET& hSocket) +{ + if (hSocket == INVALID_SOCKET) + return false; +#ifdef WIN32 + int ret = closesocket(hSocket); +#else + int ret = close(hSocket); +#endif + if (ret) { + LogPrintf("Socket close failed: %d. Error: %s\n", hSocket, NetworkErrorString(WSAGetLastError())); + } + hSocket = INVALID_SOCKET; + return ret != SOCKET_ERROR; +} |