vmime/src/platforms/windows/windowsSocket.cpp

385 lines
7.3 KiB
C++

//
// VMime library (http://vmime.sourceforge.net)
// Copyright (C) 2002-2009 Vincent Richard <vincent@vincent-richard.net>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 3 of
// the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// Linking this library statically or dynamically with other modules is making
// a combined work based on this library. Thus, the terms and conditions of
// the GNU General Public License cover the whole combination.
//
#include "vmime/config.hpp"
#if VMIME_PLATFORM_IS_WINDOWS && VMIME_HAVE_MESSAGING_FEATURES
#pragma warning(disable: 4267)
#include "vmime/platforms/windows/windowsSocket.hpp"
#include "vmime/exception.hpp"
namespace vmime {
namespace platforms {
namespace windows {
//
// windowsSocket
//
windowsSocket::windowsSocket(ref <vmime::net::timeoutHandler> th)
: m_timeoutHandler(th), m_desc(INVALID_SOCKET), m_status(0)
{
WSAData wsaData;
WSAStartup(MAKEWORD(1, 1), &wsaData);
}
windowsSocket::~windowsSocket()
{
if (m_desc != INVALID_SOCKET)
::closesocket(m_desc);
WSACleanup();
}
void windowsSocket::connect(const vmime::string& address, const vmime::port_t port)
{
// Close current connection, if any
if (m_desc != INVALID_SOCKET)
{
::closesocket(m_desc);
m_desc = INVALID_SOCKET;
}
// Resolve address
::sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(static_cast <unsigned short>(port));
addr.sin_addr.s_addr = ::inet_addr(address.c_str());
if (addr.sin_addr.s_addr == static_cast <int>(-1))
{
::hostent* hostInfo = ::gethostbyname(address.c_str());
if (hostInfo == NULL)
{
// Error: cannot resolve address
throw vmime::exceptions::connection_error("Cannot resolve address.");
}
memcpy(reinterpret_cast <char*>(&addr.sin_addr), hostInfo->h_addr, hostInfo->h_length);
}
// Get a new socket
m_desc = ::socket(AF_INET, SOCK_STREAM, 0);
if (m_desc == INVALID_SOCKET)
{
try
{
int err = WSAGetLastError();
throwSocketError(err);
}
catch (exceptions::socket_exception& e)
{
throw vmime::exceptions::connection_error
("Error while creating socket.", e);
}
}
// Start connection
if (::connect(m_desc, reinterpret_cast <sockaddr*>(&addr), sizeof(addr)) == -1)
{
try
{
int err = WSAGetLastError();
throwSocketError(err);
}
catch (exceptions::socket_exception& e)
{
::closesocket(m_desc);
m_desc = INVALID_SOCKET;
// Error
throw vmime::exceptions::connection_error
("Error while connecting socket.", e);
}
}
// Set socket to non-blocking
unsigned long non_blocking = 1;
::ioctlsocket(m_desc, FIONBIO, &non_blocking);
}
bool windowsSocket::isConnected() const
{
if (m_desc == INVALID_SOCKET)
return false;
char buff;
return ::recv(m_desc, &buff, 1, MSG_PEEK) != 0;
}
void windowsSocket::disconnect()
{
if (m_desc != INVALID_SOCKET)
{
::shutdown(m_desc, SD_BOTH);
::closesocket(m_desc);
m_desc = INVALID_SOCKET;
}
}
windowsSocket::size_type windowsSocket::getBlockSize() const
{
return 16384; // 16 KB
}
void windowsSocket::receive(vmime::string& buffer)
{
const size_type size = receiveRaw(m_buffer, sizeof(m_buffer));
buffer = vmime::string(m_buffer, size);
}
windowsSocket::size_type windowsSocket::receiveRaw(char* buffer, const size_type count)
{
m_status &= ~STATUS_WOULDBLOCK;
// Check whether data is available
bool timedout;
waitForData(READ, timedout);
if (timedout)
{
// No data available at this time
// Check if we are timed out
if (m_timeoutHandler &&
m_timeoutHandler->isTimeOut())
{
if (!m_timeoutHandler->handleTimeOut())
{
// Server did not react within timeout delay
throwSocketError(WSAETIMEDOUT);
}
else
{
// Reset timeout
m_timeoutHandler->resetTimeOut();
}
}
// Continue waiting for data
return 0;
}
// Read available data
int ret = ::recv(m_desc, buffer, count, 0);
if (ret == SOCKET_ERROR)
{
int err = WSAGetLastError();
if (err != WSAEWOULDBLOCK)
throwSocketError(err);
m_status |= STATUS_WOULDBLOCK;
// Error or no data
return (0);
}
else if (ret == 0)
{
// Host shutdown
throwSocketError(WSAENOTCONN);
}
else
{
// Data received, reset timeout
if (m_timeoutHandler)
m_timeoutHandler->resetTimeOut();
return ret;
}
}
void windowsSocket::send(const vmime::string& buffer)
{
sendRaw(buffer.data(), buffer.length());
}
void windowsSocket::sendRaw(const char* buffer, const size_type count)
{
m_status &= ~STATUS_WOULDBLOCK;
size_type size = count;
while (size > 0)
{
const int ret = ::send(m_desc, buffer, size, 0);
if (ret == SOCKET_ERROR)
{
int err = WSAGetLastError();
if (err != WSAEWOULDBLOCK)
throwSocketError(err);
bool timedout;
waitForData(WRITE, timedout);
}
else
{
buffer += ret;
size -= ret;
}
}
// Reset timeout
if (m_timeoutHandler)
m_timeoutHandler->resetTimeOut();
}
windowsSocket::size_type windowsSocket::sendRawNonBlocking(const char* buffer, const size_type count, const bool block)
{
m_status &= ~STATUS_WOULDBLOCK;
const int ret = ::send(m_desc, buffer, count, 0);
if (ret == SOCKET_ERROR)
{
int err = WSAGetLastError();
if (err == WSAEWOULDBLOCK)
{
m_status |= STATUS_WOULDBLOCK;
// No data can be written at this time
return 0;
}
else
{
throwSocketError(err);
}
}
return ret;
}
unsigned int windowsSocket::getStatus() const
{
return m_status;
}
void windowsSocket::throwSocketError(const int err)
{
std::ostringstream oss;
string msg;
LPTSTR str;
if (::FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, err, 0, (LPTSTR) &str, 0, NULL) == 0)
{
// Failed getting message
oss << "Unknown socket error (code " << err << ")";
}
else
{
oss << str;
::LocalFree(str);
}
msg = oss.str();
throw exceptions::socket_exception(msg);
}
void windowsSocket::waitForData(const WaitOpType t, bool& timedOut)
{
// Check whether data is available
fd_set fds;
FD_ZERO(&fds);
FD_SET(m_desc, &fds);
struct timeval tv;
tv.tv_sec = 1;
tv.tv_usec = 0;
int ret;
if (t & READ)
ret = ::select(m_desc + 1, &fds, NULL, NULL, &tv);
else if (t & WRITE)
ret = ::select(m_desc + 1, NULL, &fds, NULL, &tv);
else
ret = ::select(m_desc + 1, &fds, &fds, NULL, &tv);
timedOut = (ret == 0);
if (ret == SOCKET_ERROR)
{
int err = WSAGetLastError();
throwSocketError(err);
}
}
//
// posixSocketFactory
//
ref <vmime::net::socket> windowsSocketFactory::create()
{
ref <vmime::net::timeoutHandler> th = NULL;
return vmime::create <windowsSocket>(th);
}
ref <vmime::net::socket> windowsSocketFactory::create(ref <vmime::net::timeoutHandler> th)
{
return vmime::create <windowsSocket>(th);
}
} // posix
} // platforms
} // vmime
#endif // VMIME_PLATFORM_IS_WINDOWS && VMIME_HAVE_MESSAGING_FEATURES