// socketft.cpp - written and placed in the public domain by Wei Dai
#include "pch.h"
#include "socketft.h"
#ifdef SOCKETS_AVAILABLE
#include "wait.h"
#ifdef USE_BERKELEY_STYLE_SOCKETS
#include <errno.h>
#include <netdb.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/ioctl.h>
#endif
NAMESPACE_BEGIN(CryptoPP)
#ifdef USE_WINDOWS_STYLE_SOCKETS
const int SOCKET_EINVAL = WSAEINVAL;
const int SOCKET_EWOULDBLOCK = WSAEWOULDBLOCK;
typedef int socklen_t;
#else
const int SOCKET_EINVAL = EINVAL;
const int SOCKET_EWOULDBLOCK = EWOULDBLOCK;
#endif
Socket::Err::Err(socket_t s, const std::string& operation, int error)
: OS_Error(IO_ERROR, "Socket: " + operation + " operation failed with error " + IntToString(error), operation, error)
, m_s(s)
{
}
Socket::~Socket()
{
if (m_own)
{
try
{
CloseSocket();
}
catch (...)
{
}
}
}
void Socket::AttachSocket(socket_t s, bool own)
{
if (m_own)
CloseSocket();
m_s = s;
m_own = own;
SocketChanged();
}
socket_t Socket::DetachSocket()
{
socket_t s = m_s;
m_s = INVALID_SOCKET;
SocketChanged();
return s;
}
void Socket::Create(int nType)
{
assert(m_s == INVALID_SOCKET);
m_s = socket(AF_INET, nType, 0);
CheckAndHandleError("socket", m_s);
m_own = true;
SocketChanged();
}
void Socket::CloseSocket()
{
if (m_s != INVALID_SOCKET)
{
#ifdef USE_WINDOWS_STYLE_SOCKETS
CancelIo((HANDLE) m_s);
CheckAndHandleError_int("closesocket", closesocket(m_s));
#else
CheckAndHandleError_int("close", close(m_s));
#endif
m_s = INVALID_SOCKET;
SocketChanged();
}
}
void Socket::Bind(unsigned int port, const char *addr)
{
sockaddr_in sa;
memset(&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
if (addr == NULL)
sa.sin_addr.s_addr = htonl(INADDR_ANY);
else
{
unsigned long result = inet_addr(addr);
if (result == -1) // Solaris doesn't have INADDR_NONE
{
SetLastError(SOCKET_EINVAL);
CheckAndHandleError_int("inet_addr", SOCKET_ERROR);
}
sa.sin_addr.s_addr = result;
}
sa.sin_port = htons((u_short)port);
Bind((sockaddr *)&sa, sizeof(sa));
}
void Socket::Bind(const sockaddr *psa, socklen_t saLen)
{
assert(m_s != INVALID_SOCKET);
// cygwin workaround: needs const_cast
CheckAndHandleError_int("bind", bind(m_s, const_cast<sockaddr *>(psa), saLen));
}
void Socket::Listen(int backlog)
{
assert(m_s != INVALID_SOCKET);
CheckAndHandleError_int("listen", listen(m_s, backlog));
}
bool Socket::Connect(const char *addr, unsigned int port)
{
assert(addr != NULL);
sockaddr_in sa;
memset(&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = inet_addr(addr);
if (sa.sin_addr.s_addr == -1) // Solaris doesn't have INADDR_NONE
{
hostent *lphost = gethostbyname(addr);
if (lphost == NULL)
{
SetLastError(SOCKET_EINVAL);
CheckAndHandleError_int("gethostbyname", SOCKET_ERROR);
}
sa.sin_addr.s_addr = ((in_addr *)lphost->h_addr)->s_addr;
}
sa.sin_port = htons((u_short)port);
return Connect((const sockaddr *)&sa, sizeof(sa));
}
bool Socket::Connect(const sockaddr* psa, socklen_t saLen)
{
assert(m_s != INVALID_SOCKET);
int result = connect(m_s, const_cast<sockaddr*>(psa), saLen);
if (result == SOCKET_ERROR && GetLastError() == SOCKET_EWOULDBLOCK)
return false;
CheckAndHandleError_int("connect", result);
return true;
}
bool Socket::Accept(Socket& target, sockaddr *psa, socklen_t *psaLen)
{
assert(m_s != INVALID_SOCKET);
socket_t s = accept(m_s, psa, psaLen);
if (s == INVALID_SOCKET && GetLastError() == SOCKET_EWOULDBLOCK)
return false;
CheckAndHandleError("accept", s);
target.AttachSocket(s, true);
return true;
}
void Socket::GetSockName(sockaddr *psa, socklen_t *psaLen)
{
assert(m_s != INVALID_SOCKET);
CheckAndHandleError_int("getsockname", getsockname(m_s, psa, psaLen));
}
void Socket::GetPeerName(sockaddr *psa, socklen_t *psaLen)
{
assert(m_s != INVALID_SOCKET);
CheckAndHandleError_int("getpeername", getpeername(m_s, psa, psaLen));
}
unsigned int Socket::Send(const byte* buf, size_t bufLen, int flags)
{
assert(m_s != INVALID_SOCKET);
int result = send(m_s, (const char *)buf, UnsignedMin(INT_MAX, bufLen), flags);
CheckAndHandleError_int("send", result);
return result;
}
unsigned int Socket::Receive(byte* buf, size_t bufLen, int flags)
{
assert(m_s != INVALID_SOCKET);
int result = recv(m_s, (char *)buf, UnsignedMin(INT_MAX, bufLen), flags);
CheckAndHandleError_int("recv", result);
return result;
}
void Socket::ShutDown(int how)
{
assert(m_s != INVALID_SOCKET);
int result = shutdown(m_s, how);
CheckAndHandleError_int("shutdown", result);
}
void Socket::IOCtl(long cmd, unsigned long *argp)
{
assert(m_s != INVALID_SOCKET);
#ifdef USE_WINDOWS_STYLE_SOCKETS
CheckAndHandleError_int("ioctlsocket", ioctlsocket(m_s, cmd, argp));
#else
CheckAndHandleError_int("ioctl", ioctl(m_s, cmd, argp));
#endif
}
bool Socket::SendReady(const timeval *timeout)
{
fd_set fds;
FD_ZERO(&fds);
FD_SET(m_s, &fds);
int ready;
if (timeout == NULL)
ready = select((int)m_s+1, NULL, &fds, NULL, NULL);
else
{
timeval timeoutCopy = *timeout; // select() modified timeout on Linux
ready = select((int)m_s+1, NULL, &fds, NULL, &timeoutCopy);
}
CheckAndHandleError_int("select", ready);
return ready > 0;
}
bool Socket::ReceiveReady(const timeval *timeout)
{
fd_set fds;
FD_ZERO(&fds);
FD_SET(m_s, &fds);
int ready;
if (timeout == NULL)
ready = select((int)m_s+1, &fds, NULL, NULL, NULL);
else
{
timeval timeoutCopy = *timeout; // select() modified timeout on Linux
ready = select((int)m_s+1, &fds, NULL, NULL, &timeoutCopy);
}
CheckAndHandleError_int("select", ready);
return ready > 0;
}
unsigned int Socket::PortNameToNumber(const char *name, const char *protocol)
{
int port = atoi(name);
if (IntToString(port) == name)
return port;
servent *se = getservbyname(name, protocol);
if (!se)
throw Err(INVALID_SOCKET, "getservbyname", SOCKET_EINVAL);
return ntohs(se->s_port);
}
void Socket::StartSockets()
{
#ifdef USE_WINDOWS_STYLE_SOCKETS
WSADATA wsd;
int result = WSAStartup(0x0202, &wsd);
if (result != 0)
throw Err(INVALID_SOCKET, "WSAStartup", result);
#endif
}
void Socket::ShutdownSockets()
{
#ifdef USE_WINDOWS_STYLE_SOCKETS
int result = WSACleanup();
if (result != 0)
throw Err(INVALID_SOCKET, "WSACleanup", result);
#endif
}
int Socket::GetLastError()
{
#ifdef USE_WINDOWS_STYLE_SOCKETS
return WSAGetLastError();
#else
return errno;
#endif
}
void Socket::SetLastError(int errorCode)
{
#ifdef USE_WINDOWS_STYLE_SOCKETS
WSASetLastError(errorCode);
#else
errno = errorCode;
#endif
}
void Socket::HandleError(const char *operation) const
{
int err = GetLastError();
throw Err(m_s, operation, err);
}
#ifdef USE_WINDOWS_STYLE_SOCKETS
SocketReceiver::SocketReceiver(Socket &s)
: m_s(s), m_resultPending(false), m_eofReceived(false)
{
m_event.AttachHandle(CreateEvent(NULL, true, false, NULL), true);
m_s.CheckAndHandleError("CreateEvent", m_event.HandleValid());
memset(&m_overlapped, 0, sizeof(m_overlapped));
m_overlapped.hEvent = m_event;
}
SocketReceiver::~SocketReceiver()
{
#ifdef USE_WINDOWS_STYLE_SOCKETS
CancelIo((HANDLE) m_s.GetSocket());
#endif
}
bool SocketReceiver::Receive(byte* buf, size_t bufLen)
{
assert(!m_resultPending && !m_eofReceived);
DWORD flags = 0;
// don't queue too much at once, or we might use up non-paged memory
WSABUF wsabuf = {UnsignedMin((u_long)128*1024, bufLen), (char *)buf};
if (WSARecv(m_s, &wsabuf, 1, &m_lastResult, &flags, &m_overlapped, NULL) == 0)
{
if (m_lastResult == 0)
m_eofReceived = true;
}
else
{
switch (WSAGetLastError())
{
default:
m_s.CheckAndHandleError_int("WSARecv", SOCKET_ERROR);
case WSAEDISCON:
m_lastResult = 0;
m_eofReceived = true;
break;
case WSA_IO_PENDING:
m_resultPending = true;
}
}
return !m_resultPending;
}
void SocketReceiver::GetWaitObjects(WaitObjectContainer &container, CallStack const& callStack)
{
if (m_resultPending)
container.AddHandle(m_event, CallStack("SocketReceiver::GetWaitObjects() - result pending", &callStack));
else if (!m_eofReceived)
container.SetNoWait(CallStack("SocketReceiver::GetWaitObjects() - result ready", &callStack));
}
unsigned int SocketReceiver::GetReceiveResult()
{
if (m_resultPending)
{
DWORD flags = 0;
if (WSAGetOverlappedResult(m_s, &m_overlapped, &m_lastResult, false, &flags))
{
if (m_lastResult == 0)
m_eofReceived = true;
}
else
{
switch (WSAGetLastError())
{
default:
m_s.CheckAndHandleError("WSAGetOverlappedResult", FALSE);
case WSAEDISCON:
m_lastResult = 0;
m_eofReceived = true;
}
}
m_resultPending = false;
}
return m_lastResult;
}
// *************************************************************
SocketSender::SocketSender(Socket &s)
: m_s(s), m_resultPending(false), m_lastResult(0)
{
m_event.AttachHandle(CreateEvent(NULL, true, false, NULL), true);
m_s.CheckAndHandleError("CreateEvent", m_event.HandleValid());
memset(&m_overlapped, 0, sizeof(m_overlapped));
m_overlapped.hEvent = m_event;
}
SocketSender::~SocketSender()
{
#ifdef USE_WINDOWS_STYLE_SOCKETS
CancelIo((HANDLE) m_s.GetSocket());
#endif
}
void SocketSender::Send(const byte* buf, size_t bufLen)
{
assert(!m_resultPending);
DWORD written = 0;
// don't queue too much at once, or we might use up non-paged memory
WSABUF wsabuf = {UnsignedMin((u_long)128*1024, bufLen), (char *)buf};
if (WSASend(m_s, &wsabuf, 1, &written, 0, &m_overlapped, NULL) == 0)
{
m_resultPending = false;
m_lastResult = written;
}
else
{
if (WSAGetLastError() != WSA_IO_PENDING)
m_s.CheckAndHandleError_int("WSASend", SOCKET_ERROR);
m_resultPending = true;
}
}
void SocketSender::SendEof()
{
assert(!m_resultPending);
m_s.ShutDown(SD_SEND);
m_s.CheckAndHandleError("ResetEvent", ResetEvent(m_event));
m_s.CheckAndHandleError_int("WSAEventSelect", WSAEventSelect(m_s, m_event, FD_CLOSE));
m_resultPending = true;
}
bool SocketSender::EofSent()
{
if (m_resultPending)
{
WSANETWORKEVENTS events;
m_s.CheckAndHandleError_int("WSAEnumNetworkEvents", WSAEnumNetworkEvents(m_s, m_event, &events));
if ((events.lNetworkEvents & FD_CLOSE) != FD_CLOSE)
throw Socket::Err(m_s, "WSAEnumNetworkEvents (FD_CLOSE not present)", E_FAIL);
if (events.iErrorCode[FD_CLOSE_BIT] != 0)
throw Socket::Err(m_s, "FD_CLOSE (via WSAEnumNetworkEvents)", events.iErrorCode[FD_CLOSE_BIT]);
m_resultPending = false;
}
return m_lastResult != 0;
}
void SocketSender::GetWaitObjects(WaitObjectContainer &container, CallStack const& callStack)
{
if (m_resultPending)
container.AddHandle(m_event, CallStack("SocketSender::GetWaitObjects() - result pending", &callStack));
else
container.SetNoWait(CallStack("SocketSender::GetWaitObjects() - result ready", &callStack));
}
unsigned int SocketSender::GetSendResult()
{
if (m_resultPending)
{
DWORD flags = 0;
BOOL result = WSAGetOverlappedResult(m_s, &m_overlapped, &m_lastResult, false, &flags);
m_s.CheckAndHandleError("WSAGetOverlappedResult", result);
m_resultPending = false;
}
return m_lastResult;
}
#endif
#ifdef USE_BERKELEY_STYLE_SOCKETS
SocketReceiver::SocketReceiver(Socket &s)
: m_s(s), m_lastResult(0), m_eofReceived(false)
{
}
void SocketReceiver::GetWaitObjects(WaitObjectContainer &container, CallStack const& callStack)
{
if (!m_eofReceived)
container.AddReadFd(m_s, CallStack("SocketReceiver::GetWaitObjects()", &callStack));
}
bool SocketReceiver::Receive(byte* buf, size_t bufLen)
{
m_lastResult = m_s.Receive(buf, bufLen);
if (bufLen > 0 && m_lastResult == 0)
m_eofReceived = true;
return true;
}
unsigned int SocketReceiver::GetReceiveResult()
{
return m_lastResult;
}
SocketSender::SocketSender(Socket &s)
: m_s(s), m_lastResult(0)
{
}
void SocketSender::Send(const byte* buf, size_t bufLen)
{
m_lastResult = m_s.Send(buf, bufLen);
}
void SocketSender::SendEof()
{
m_s.ShutDown(SD_SEND);
}
unsigned int SocketSender::GetSendResult()
{
return m_lastResult;
}
void SocketSender::GetWaitObjects(WaitObjectContainer &container, CallStack const& callStack)
{
container.AddWriteFd(m_s, CallStack("SocketSender::GetWaitObjects()", &callStack));
}
#endif
NAMESPACE_END
#endif // #ifdef SOCKETS_AVAILABLE