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Copy pathSocketImpl.cpp
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914 lines (745 loc) · 19.5 KB
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//
// SocketImpl.cpp
//
// $Id: //poco/Main/Net/src/SocketImpl.cpp#26 $
//
// Library: Net
// Package: Sockets
// Module: SocketImpl
//
// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
#include "Poco/Net/SocketImpl.h"
#include "Poco/Net/NetException.h"
#include "Poco/Net/StreamSocketImpl.h"
#include "Poco/NumberFormatter.h"
#include "Poco/Timestamp.h"
#include <string.h> // FD_SET needs memset on some platforms, so we can't use <cstring>
#if defined(POCO_HAVE_FD_POLL)
#include <poll.h>
#endif
using Poco::IOException;
using Poco::TimeoutException;
using Poco::InvalidArgumentException;
using Poco::NumberFormatter;
using Poco::Timespan;
namespace Poco {
namespace Net {
SocketImpl::SocketImpl():
_sockfd(POCO_INVALID_SOCKET),
_blocking(true)
{
}
SocketImpl::SocketImpl(poco_socket_t sockfd):
_sockfd(sockfd),
_blocking(true)
{
}
SocketImpl::~SocketImpl()
{
close();
}
SocketImpl* SocketImpl::acceptConnection(SocketAddress& clientAddr)
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
char buffer[SocketAddress::MAX_ADDRESS_LENGTH];
struct sockaddr* pSA = reinterpret_cast<struct sockaddr*>(buffer);
poco_socklen_t saLen = sizeof(buffer);
poco_socket_t sd;
do
{
sd = ::accept(_sockfd, pSA, &saLen);
}
while (sd == POCO_INVALID_SOCKET && lastError() == POCO_EINTR);
if (sd != POCO_INVALID_SOCKET)
{
clientAddr = SocketAddress(pSA, saLen);
return new StreamSocketImpl(sd);
}
error(); // will throw
return 0;
}
void SocketImpl::connect(const SocketAddress& address)
{
if (_sockfd == POCO_INVALID_SOCKET)
{
init(address.af());
}
int rc;
do
{
rc = ::connect(_sockfd, address.addr(), address.length());
}
while (rc != 0 && lastError() == POCO_EINTR);
if (rc != 0) error(address.toString());
}
void SocketImpl::connect(const SocketAddress& address, const Poco::Timespan& timeout)
{
poco_assert (_sockfd == POCO_INVALID_SOCKET);
init(address.af());
setBlocking(false);
try
{
int rc = ::connect(_sockfd, address.addr(), address.length());
if (rc != 0)
{
if (lastError() != POCO_EINPROGRESS && lastError() != POCO_EWOULDBLOCK)
error(address.toString());
if (!poll(timeout, SELECT_READ | SELECT_WRITE))
throw Poco::TimeoutException("connect timed out", address.toString());
int err = socketError();
if (err != 0) error(err);
}
}
catch (Poco::Exception&)
{
setBlocking(true);
throw;
}
setBlocking(true);
}
void SocketImpl::connectNB(const SocketAddress& address)
{
if (_sockfd == POCO_INVALID_SOCKET)
{
init(address.af());
}
setBlocking(false);
int rc = ::connect(_sockfd, address.addr(), address.length());
if (rc != 0)
{
if (lastError() != POCO_EINPROGRESS && lastError() != POCO_EWOULDBLOCK)
error(address.toString());
}
}
void SocketImpl::bind(const SocketAddress& address, bool reuseAddress)
{
if (_sockfd == POCO_INVALID_SOCKET)
{
init(address.af());
}
if (reuseAddress)
{
setReuseAddress(true);
setReusePort(true);
}
int rc = ::bind(_sockfd, address.addr(), address.length());
if (rc != 0) error(address.toString());
}
void SocketImpl::listen(int backlog)
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
int rc = ::listen(_sockfd, backlog);
if (rc != 0) error();
}
void SocketImpl::close()
{
if (_sockfd != POCO_INVALID_SOCKET)
{
poco_closesocket(_sockfd);
_sockfd = POCO_INVALID_SOCKET;
}
}
void SocketImpl::shutdownReceive()
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
int rc = ::shutdown(_sockfd, 0);
if (rc != 0) error();
}
void SocketImpl::shutdownSend()
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
int rc = ::shutdown(_sockfd, 1);
if (rc != 0) error();
}
void SocketImpl::shutdown()
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
int rc = ::shutdown(_sockfd, 2);
if (rc != 0) error();
}
int SocketImpl::sendBytes(const void* buffer, int length, int flags)
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
#if defined(POCO_BROKEN_TIMEOUTS)
if (_sndTimeout.totalMicroseconds() != 0)
{
if (!poll(_sndTimeout, SELECT_WRITE))
throw TimeoutException();
}
#endif
int rc;
do
{
rc = ::send(_sockfd, reinterpret_cast<const char*>(buffer), length, flags);
}
while (rc < 0 && lastError() == POCO_EINTR);
if (rc < 0) error();
return rc;
}
int SocketImpl::receiveBytes(void* buffer, int length, int flags)
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
#if defined(POCO_BROKEN_TIMEOUTS)
if (_recvTimeout.totalMicroseconds() != 0)
{
if (!poll(_recvTimeout, SELECT_READ))
throw TimeoutException();
}
#endif
int rc;
do
{
rc = ::recv(_sockfd, reinterpret_cast<char*>(buffer), length, flags);
}
while (rc < 0 && lastError() == POCO_EINTR);
if (rc < 0)
{
if (lastError() == POCO_EAGAIN || lastError() == POCO_ETIMEDOUT)
throw TimeoutException();
else
error();
}
return rc;
}
int SocketImpl::sendTo(const void* buffer, int length, const SocketAddress& address, int flags)
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
int rc;
do
{
rc = ::sendto(_sockfd, reinterpret_cast<const char*>(buffer), length, flags, address.addr(), address.length());
}
while (rc < 0 && lastError() == POCO_EINTR);
if (rc < 0) error();
return rc;
}
int SocketImpl::receiveFrom(void* buffer, int length, SocketAddress& address, int flags)
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
#if defined(POCO_BROKEN_TIMEOUTS)
if (_recvTimeout.totalMicroseconds() != 0)
{
if (!poll(_recvTimeout, SELECT_READ))
throw TimeoutException();
}
#endif
char abuffer[SocketAddress::MAX_ADDRESS_LENGTH];
struct sockaddr* pSA = reinterpret_cast<struct sockaddr*>(abuffer);
poco_socklen_t saLen = sizeof(abuffer);
int rc;
do
{
rc = ::recvfrom(_sockfd, reinterpret_cast<char*>(buffer), length, flags, pSA, &saLen);
}
while (rc < 0 && lastError() == POCO_EINTR);
if (rc >= 0)
{
address = SocketAddress(pSA, saLen);
}
else
{
if (lastError() == POCO_EAGAIN || lastError() == POCO_ETIMEDOUT)
throw TimeoutException();
else
error();
}
return rc;
}
void SocketImpl::sendUrgent(unsigned char data)
{
int rc = ::send(_sockfd, reinterpret_cast<const char*>(&data), sizeof(data), MSG_OOB);
if (rc < 0) error();
}
int SocketImpl::available()
{
int result;
ioctl(FIONREAD, result);
return result;
}
bool SocketImpl::poll(const Poco::Timespan& timeout, int mode)
{
#if defined(POCO_HAVE_FD_POLL)
pollfd pollBuf;
memset(&pollBuf, 0, sizeof(pollfd));
pollBuf.fd = _sockfd;
if (mode & SELECT_READ) pollBuf.events |= POLLIN;
if (mode & SELECT_WRITE) pollBuf.events |= POLLOUT;
Poco::Timespan remainingTime(timeout);
int rc;
do
{
Poco::Timestamp start;
rc = ::poll(&pollBuf, 1, remainingTime.totalMilliseconds());
if (rc < 0 && lastError() == POCO_EINTR)
{
Poco::Timestamp end;
Poco::Timespan waited = end - start;
if (waited < remainingTime)
remainingTime -= waited;
else
remainingTime = 0;
}
} while (rc < 0 && lastError() == POCO_EINTR);
#else
fd_set fdRead;
fd_set fdWrite;
fd_set fdExcept;
FD_ZERO(&fdRead);
FD_ZERO(&fdWrite);
FD_ZERO(&fdExcept);
if (mode & SELECT_READ)
{
FD_SET(_sockfd, &fdRead);
}
if (mode & SELECT_WRITE)
{
FD_SET(_sockfd, &fdWrite);
}
if (mode & SELECT_ERROR)
{
FD_SET(_sockfd, &fdExcept);
}
Poco::Timespan remainingTime(timeout);
int rc;
do
{
struct timeval tv;
tv.tv_sec = (long) remainingTime.totalSeconds();
tv.tv_usec = (long) remainingTime.useconds();
Poco::Timestamp start;
rc = ::select(int(_sockfd) + 1, &fdRead, &fdWrite, &fdExcept, &tv);
if (rc < 0 && lastError() == POCO_EINTR)
{
Poco::Timestamp end;
Poco::Timespan waited = end - start;
if (waited < remainingTime)
remainingTime -= waited;
else
remainingTime = 0;
}
}
while (rc < 0 && lastError() == POCO_EINTR);
#endif
if (rc < 0) error();
return rc > 0;
}
void SocketImpl::setSendBufferSize(int size)
{
setOption(SOL_SOCKET, SO_SNDBUF, size);
}
int SocketImpl::getSendBufferSize()
{
int result;
getOption(SOL_SOCKET, SO_SNDBUF, result);
return result;
}
void SocketImpl::setReceiveBufferSize(int size)
{
setOption(SOL_SOCKET, SO_RCVBUF, size);
}
int SocketImpl::getReceiveBufferSize()
{
int result;
getOption(SOL_SOCKET, SO_RCVBUF, result);
return result;
}
void SocketImpl::setSendTimeout(const Poco::Timespan& timeout)
{
#if defined(_WIN32)
int value = (int) timeout.totalMilliseconds();
setOption(SOL_SOCKET, SO_SNDTIMEO, value);
#elif defined(POCO_BROKEN_TIMEOUTS)
_sndTimeout = timeout;
#else
setOption(SOL_SOCKET, SO_SNDTIMEO, timeout);
#endif
}
Poco::Timespan SocketImpl::getSendTimeout()
{
Timespan result;
#if defined(_WIN32)
int value;
getOption(SOL_SOCKET, SO_SNDTIMEO, value);
result = Timespan::TimeDiff(value)*1000;
#elif defined(POCO_BROKEN_TIMEOUTS)
result = _sndTimeout;
#else
getOption(SOL_SOCKET, SO_SNDTIMEO, result);
#endif
return result;
}
void SocketImpl::setReceiveTimeout(const Poco::Timespan& timeout)
{
#ifndef POCO_BROKEN_TIMEOUTS
#if defined(_WIN32)
int value = (int) timeout.totalMilliseconds();
setOption(SOL_SOCKET, SO_RCVTIMEO, value);
#else
setOption(SOL_SOCKET, SO_RCVTIMEO, timeout);
#endif
#else
_recvTimeout = timeout;
#endif
}
Poco::Timespan SocketImpl::getReceiveTimeout()
{
Timespan result;
#if defined(_WIN32)
int value;
getOption(SOL_SOCKET, SO_RCVTIMEO, value);
result = Timespan::TimeDiff(value)*1000;
#elif defined(POCO_BROKEN_TIMEOUTS)
result = _recvTimeout;
#else
getOption(SOL_SOCKET, SO_RCVTIMEO, result);
#endif
return result;
}
SocketAddress SocketImpl::address()
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
char buffer[SocketAddress::MAX_ADDRESS_LENGTH];
struct sockaddr* pSA = reinterpret_cast<struct sockaddr*>(buffer);
poco_socklen_t saLen = sizeof(buffer);
int rc = ::getsockname(_sockfd, pSA, &saLen);
if (rc == 0)
return SocketAddress(pSA, saLen);
else
error();
return SocketAddress();
}
SocketAddress SocketImpl::peerAddress()
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
char buffer[SocketAddress::MAX_ADDRESS_LENGTH];
struct sockaddr* pSA = reinterpret_cast<struct sockaddr*>(buffer);
poco_socklen_t saLen = sizeof(buffer);
int rc = ::getpeername(_sockfd, pSA, &saLen);
if (rc == 0)
return SocketAddress(pSA, saLen);
else
error();
return SocketAddress();
}
void SocketImpl::setOption(int level, int option, int value)
{
setRawOption(level, option, &value, sizeof(value));
}
void SocketImpl::setOption(int level, int option, unsigned value)
{
setRawOption(level, option, &value, sizeof(value));
}
void SocketImpl::setOption(int level, int option, unsigned char value)
{
setRawOption(level, option, &value, sizeof(value));
}
void SocketImpl::setOption(int level, int option, const IPAddress& value)
{
setRawOption(level, option, value.addr(), value.length());
}
void SocketImpl::setOption(int level, int option, const Poco::Timespan& value)
{
struct timeval tv;
tv.tv_sec = (long) value.totalSeconds();
tv.tv_usec = (long) value.useconds();
setRawOption(level, option, &tv, sizeof(tv));
}
void SocketImpl::setRawOption(int level, int option, const void* value, poco_socklen_t length)
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
int rc = ::setsockopt(_sockfd, level, option, reinterpret_cast<const char*>(value), length);
if (rc == -1) error();
}
void SocketImpl::getOption(int level, int option, int& value)
{
poco_socklen_t len = sizeof(value);
getRawOption(level, option, &value, len);
}
void SocketImpl::getOption(int level, int option, unsigned& value)
{
poco_socklen_t len = sizeof(value);
getRawOption(level, option, &value, len);
}
void SocketImpl::getOption(int level, int option, unsigned char& value)
{
poco_socklen_t len = sizeof(value);
getRawOption(level, option, &value, len);
}
void SocketImpl::getOption(int level, int option, Poco::Timespan& value)
{
struct timeval tv;
poco_socklen_t len = sizeof(tv);
getRawOption(level, option, &tv, len);
value.assign(tv.tv_sec, tv.tv_usec);
}
void SocketImpl::getOption(int level, int option, IPAddress& value)
{
char buffer[IPAddress::MAX_ADDRESS_LENGTH];
poco_socklen_t len = sizeof(buffer);
getRawOption(level, option, buffer, len);
value = IPAddress(buffer, len);
}
void SocketImpl::getRawOption(int level, int option, void* value, poco_socklen_t& length)
{
poco_assert (_sockfd != POCO_INVALID_SOCKET);
int rc = ::getsockopt(_sockfd, level, option, reinterpret_cast<char*>(value), &length);
if (rc == -1) error();
}
void SocketImpl::setLinger(bool on, int seconds)
{
struct linger l;
l.l_onoff = on ? 1 : 0;
l.l_linger = seconds;
setRawOption(SOL_SOCKET, SO_LINGER, &l, sizeof(l));
}
void SocketImpl::getLinger(bool& on, int& seconds)
{
struct linger l;
poco_socklen_t len = sizeof(l);
getRawOption(SOL_SOCKET, SO_LINGER, &l, len);
on = l.l_onoff != 0;
seconds = l.l_linger;
}
void SocketImpl::setNoDelay(bool flag)
{
int value = flag ? 1 : 0;
setOption(IPPROTO_TCP, TCP_NODELAY, value);
}
bool SocketImpl::getNoDelay()
{
int value;
getOption(IPPROTO_TCP, TCP_NODELAY, value);
return value != 0;
}
void SocketImpl::setKeepAlive(bool flag)
{
int value = flag ? 1 : 0;
setOption(SOL_SOCKET, SO_KEEPALIVE, value);
}
bool SocketImpl::getKeepAlive()
{
int value;
getOption(SOL_SOCKET, SO_KEEPALIVE, value);
return value != 0;
}
void SocketImpl::setReuseAddress(bool flag)
{
int value = flag ? 1 : 0;
setOption(SOL_SOCKET, SO_REUSEADDR, value);
}
bool SocketImpl::getReuseAddress()
{
int value;
getOption(SOL_SOCKET, SO_REUSEADDR, value);
return value != 0;
}
void SocketImpl::setReusePort(bool flag)
{
#ifdef SO_REUSEPORT
try
{
int value = flag ? 1 : 0;
setOption(SOL_SOCKET, SO_REUSEPORT, value);
}
catch (IOException&)
{
// ignore error, since not all implementations
// support SO_REUSEPORT, even if the macro
// is defined.
}
#endif
}
bool SocketImpl::getReusePort()
{
#ifdef SO_REUSEPORT
int value;
getOption(SOL_SOCKET, SO_REUSEPORT, value);
return value != 0;
#else
return false;
#endif
}
void SocketImpl::setOOBInline(bool flag)
{
int value = flag ? 1 : 0;
setOption(SOL_SOCKET, SO_OOBINLINE, value);
}
bool SocketImpl::getOOBInline()
{
int value;
getOption(SOL_SOCKET, SO_OOBINLINE, value);
return value != 0;
}
void SocketImpl::setBroadcast(bool flag)
{
int value = flag ? 1 : 0;
setOption(SOL_SOCKET, SO_BROADCAST, value);
}
bool SocketImpl::getBroadcast()
{
int value;
getOption(SOL_SOCKET, SO_BROADCAST, value);
return value != 0;
}
void SocketImpl::setBlocking(bool flag)
{
int arg = flag ? 0 : 1;
ioctl(FIONBIO, arg);
_blocking = flag;
}
int SocketImpl::socketError()
{
int result;
getOption(SOL_SOCKET, SO_ERROR, result);
return result;
}
void SocketImpl::init(int af)
{
initSocket(af, SOCK_STREAM);
}
void SocketImpl::initSocket(int af, int type, int proto)
{
poco_assert (_sockfd == POCO_INVALID_SOCKET);
_sockfd = ::socket(af, type, proto);
if (_sockfd == POCO_INVALID_SOCKET)
error();
}
void SocketImpl::ioctl(int request, int& arg)
{
#if defined(_WIN32)
int rc = ioctlsocket(_sockfd, request, reinterpret_cast<u_long*>(&arg));
#else
int rc = ::ioctl(_sockfd, request, &arg);
#endif
if (rc != 0) error();
}
void SocketImpl::ioctl(int request, void* arg)
{
#if defined(_WIN32)
int rc = ioctlsocket(_sockfd, request, reinterpret_cast<u_long*>(arg));
#else
int rc = ::ioctl(_sockfd, request, arg);
#endif
if (rc != 0) error();
}
void SocketImpl::reset(poco_socket_t aSocket)
{
_sockfd = aSocket;
}
void SocketImpl::error()
{
std::string empty;
error(lastError(), empty);
}
void SocketImpl::error(const std::string& arg)
{
error(lastError(), arg);
}
void SocketImpl::error(int code)
{
std::string arg;
error(code, arg);
}
void SocketImpl::error(int code, const std::string& arg)
{
switch (code)
{
case POCO_ESYSNOTREADY:
throw NetException("Net subsystem not ready", code);
case POCO_ENOTINIT:
throw NetException("Net subsystem not initialized", code);
case POCO_EINTR:
throw IOException("Interrupted", code);
case POCO_EACCES:
throw IOException("Permission denied", code);
case POCO_EFAULT:
throw IOException("Bad address", code);
case POCO_EINVAL:
throw InvalidArgumentException(code);
case POCO_EMFILE:
throw IOException("Too many open files", code);
case POCO_EWOULDBLOCK:
throw IOException("Operation would block", code);
case POCO_EINPROGRESS:
throw IOException("Operation now in progress", code);
case POCO_EALREADY:
throw IOException("Operation already in progress", code);
case POCO_ENOTSOCK:
throw IOException("Socket operation attempted on non-socket", code);
case POCO_EDESTADDRREQ:
throw NetException("Destination address required", code);
case POCO_EMSGSIZE:
throw NetException("Message too long", code);
case POCO_EPROTOTYPE:
throw NetException("Wrong protocol type", code);
case POCO_ENOPROTOOPT:
throw NetException("Protocol not available", code);
case POCO_EPROTONOSUPPORT:
throw NetException("Protocol not supported", code);
case POCO_ESOCKTNOSUPPORT:
throw NetException("Socket type not supported", code);
case POCO_ENOTSUP:
throw NetException("Operation not supported", code);
case POCO_EPFNOSUPPORT:
throw NetException("Protocol family not supported", code);
case POCO_EAFNOSUPPORT:
throw NetException("Address family not supported", code);
case POCO_EADDRINUSE:
throw NetException("Address already in use", arg, code);
case POCO_EADDRNOTAVAIL:
throw NetException("Cannot assign requested address", arg, code);
case POCO_ENETDOWN:
throw NetException("Network is down", code);
case POCO_ENETUNREACH:
throw NetException("Network is unreachable", code);
case POCO_ENETRESET:
throw NetException("Network dropped connection on reset", code);
case POCO_ECONNABORTED:
throw ConnectionAbortedException(code);
case POCO_ECONNRESET:
throw ConnectionResetException(code);
case POCO_ENOBUFS:
throw IOException("No buffer space available", code);
case POCO_EISCONN:
throw NetException("Socket is already connected", code);
case POCO_ENOTCONN:
throw NetException("Socket is not connected", code);
case POCO_ESHUTDOWN:
throw NetException("Cannot send after socket shutdown", code);
case POCO_ETIMEDOUT:
throw TimeoutException(code);
case POCO_ECONNREFUSED:
throw ConnectionRefusedException(arg, code);
case POCO_EHOSTDOWN:
throw NetException("Host is down", code);
case POCO_EHOSTUNREACH:
throw NetException("No route to host", code);
default:
throw IOException(NumberFormatter::format(code) + arg, code);
}
}
} } // namespace Poco::Net