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//
// VMime library (http://www.vmime.org)
// Copyright (C) 2002-2005 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA.
//
#include "vmime/platforms/posix/posixSocket.hpp"
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include "vmime/exception.hpp"
#if VMIME_HAVE_MESSAGING_FEATURES
namespace vmime {
namespace platforms {
namespace posix {
//
// posixSocket
//
posixSocket::posixSocket()
: m_desc(-1)
{
}
posixSocket::~posixSocket()
{
if (m_desc != -1)
::close(m_desc);
}
void posixSocket::connect(const vmime::string& address, const vmime::port_t port)
{
// Close current connection, if any
if (m_desc != -1)
{
::close(m_desc);
m_desc = -1;
}
// 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 <in_addr_t>(-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 == -1)
{
try
{
throwSocketError(errno);
}
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
{
throwSocketError(errno);
}
catch (exceptions::socket_exception& e)
{
::close(m_desc);
m_desc = -1;
// Error
throw vmime::exceptions::connection_error
("Error while connecting socket.", e);
}
}
}
const bool posixSocket::isConnected() const
{
return (m_desc != -1);
}
void posixSocket::disconnect()
{
if (m_desc != -1)
{
::shutdown(m_desc, SHUT_RDWR);
::close(m_desc);
m_desc = -1;
}
}
void posixSocket::receive(vmime::string& buffer)
{
::ssize_t ret = ::recv(m_desc, m_buffer, sizeof(m_buffer), 0);
if (ret == -1)
{
// Error or no data
return;
}
else if (ret > 0)
{
buffer = vmime::string(m_buffer, ret);
}
}
const int posixSocket::receiveRaw(char* buffer, const int count)
{
::ssize_t ret = ::recv(m_desc, buffer, count, 0);
if (ret == -1)
{
// Error or no data
return (0);
}
else
{
return (ret);
}
}
void posixSocket::send(const vmime::string& buffer)
{
if (::send(m_desc, buffer.data(), buffer.length(), 0) == -1)
throwSocketError(errno);
}
void posixSocket::sendRaw(const char* buffer, const int count)
{
if (::send(m_desc, buffer, count, 0) == -1)
throwSocketError(errno);
}
void posixSocket::throwSocketError(const int err)
{
string msg;
switch (err)
{
case EACCES: msg = "EACCES: permission denied"; break;
case EAFNOSUPPORT: msg = "EAFNOSUPPORT: address family not supported"; break;
case EMFILE: msg = "EMFILE: process file table overflow"; break;
case ENFILE: msg = "ENFILE: system limit reached"; break;
case EPROTONOSUPPORT: msg = "EPROTONOSUPPORT: protocol not supported"; break;
case EAGAIN: msg = "EGAIN: blocking operation"; break;
case EBADF: msg = "EBADF: invalid descriptor"; break;
case ECONNRESET: msg = "ECONNRESET: connection reset by peer"; break;
case EFAULT: msg = "EFAULT: bad user space address"; break;
case EINTR: msg = "EINTR: signal occured before transmission"; break;
case EINVAL: msg = "EINVAL: invalid argument"; break;
case EMSGSIZE: msg = "EMSGSIZE: message cannot be sent atomically"; break;
case ENOBUFS: msg = "ENOBUFS: output queue is full"; break;
case ENOMEM: msg = "ENOMEM: out of memory"; break;
case EPIPE:
case ENOTCONN: msg = "ENOTCONN: not connected"; break;
case ECONNREFUSED: msg = "ECONNREFUSED: connection refused"; break;
default:
std::ostringstream oss;
oss << ::strerror(err);
msg = oss.str();
break;
}
throw exceptions::socket_exception(msg);
}
//
// posixSocketFactory
//
ref <vmime::net::socket> posixSocketFactory::create()
{
return vmime::create <posixSocket>();
}
} // posix
} // platforms
} // vmime
#endif // VMIME_HAVE_MESSAGING_FEATURES
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