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executable file
·1615 lines (1300 loc) · 39.4 KB
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//
// NetworkInterface.cpp
//
// $Id: //poco/1.4/Net/src/NetworkInterface.cpp#9 $
//
// Library: Net
// Package: NetCore
// Module: NetworkInterface
//
// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Net/NetworkInterface.h"
#ifdef POCO_NET_HAS_INTERFACE
#include "Poco/Net/DatagramSocket.h"
#include "Poco/Net/NetException.h"
#include "Poco/NumberFormatter.h"
#include "Poco/RefCountedObject.h"
#include "Poco/Format.h"
#if defined(POCO_OS_FAMILY_WINDOWS)
#if defined(POCO_WIN32_UTF8)
#include "Poco/UnicodeConverter.h"
#include "Poco/Error.h"
#endif
#include <iphlpapi.h>
#include <ipifcons.h>
#endif
#include <cstring>
#include <iostream>
#include <iomanip>
using Poco::NumberFormatter;
using Poco::FastMutex;
using Poco::format;
std::ostream& operator<<(std::ostream& os, const Poco::Net::NetworkInterface::MACAddress& mac)
{
std::ios state(0);
state.copyfmt(os);
for (unsigned i = 0; i < mac.size(); ++i)
{
if (i > 0) os << Poco::Net::NetworkInterface::MAC_SEPARATOR;
os << std::hex << std::setw(2) << std::setfill('0') << (unsigned) mac[i];
}
os.copyfmt(state);
return os;
}
namespace Poco {
namespace Net {
//
// NetworkInterfaceImpl
//
class NetworkInterfaceImpl: public Poco::RefCountedObject
{
public:
typedef NetworkInterface::AddressTuple AddressTuple;
typedef NetworkInterface::AddressList AddressList;
typedef NetworkInterface::Type Type;
NetworkInterfaceImpl(unsigned index);
NetworkInterfaceImpl(const std::string& name, const std::string& displayName, const std::string& adapterName, const IPAddress& address, unsigned index, NetworkInterface::MACAddress* pMACAddress = 0);
NetworkInterfaceImpl(const std::string& name, const std::string& displayName, const std::string& adapterName, unsigned index = 0, NetworkInterface::MACAddress* pMACAddress = 0);
NetworkInterfaceImpl(const std::string& name,
const std::string& displayName,
const std::string& adapterName,
const IPAddress& address,
const IPAddress& subnetMask,
const IPAddress& broadcastAddress,
unsigned index,
NetworkInterface::MACAddress* pMACAddress = 0);
unsigned index() const;
const std::string& name() const;
const std::string& displayName() const;
const std::string& adapterName() const;
const IPAddress& firstAddress(IPAddress::Family family) const;
void addAddress(const AddressTuple& address);
const IPAddress& address(unsigned index) const;
const NetworkInterface::AddressList& addressList() const;
bool hasAddress(const IPAddress& address) const;
const IPAddress& subnetMask(unsigned index) const;
const IPAddress& broadcastAddress(unsigned index) const;
const IPAddress& destAddress(unsigned index) const;
const NetworkInterface::MACAddress& macAddress() const;
bool supportsIPv4() const;
bool supportsIPv6() const;
void setName(const std::string& name);
void setDisplayName(const std::string& name);
void setAdapterName(const std::string& name);
void addAddress(const IPAddress& addr);
void setMACAddress(const NetworkInterface::MACAddress& addr);
void setMACAddress(const void *addr, std::size_t len);
unsigned mtu() const;
unsigned ifindex() const;
Type type() const;
bool broadcast() const;
bool loopback() const;
bool multicast() const;
bool pointToPoint() const;
bool running() const;
bool up() const;
#if defined(POCO_OS_FAMILY_WINDOWS)
void setFlags(DWORD flags, DWORD iftype);
void setRunning(bool running);
#else
void setFlags(short flags);
#endif
void setUp(bool up);
void setMTU(unsigned mtu);
void setType(Type type);
void setIndex(unsigned index);
void setPhyParams();
protected:
~NetworkInterfaceImpl();
private:
std::string _name;
std::string _displayName;
std::string _adapterName;
AddressList _addressList;
unsigned _index;
bool _broadcast;
bool _loopback;
bool _multicast;
bool _pointToPoint;
bool _up;
bool _running;
unsigned _mtu;
Type _type;
NetworkInterface::MACAddress _macAddress;
friend NetworkInterface::Map NetworkInterface::map(bool, bool);
};
NetworkInterfaceImpl::NetworkInterfaceImpl(unsigned index):
_index(index),
_mtu(0)
{
}
NetworkInterfaceImpl::NetworkInterfaceImpl(const std::string& name, const std::string& displayName, const std::string& adapterName, const IPAddress& address, unsigned index, NetworkInterface::MACAddress* pMACAddress):
_name(name),
_displayName(displayName),
_adapterName(adapterName),
_index(index),
_broadcast(false),
_loopback(false),
_multicast(false),
_pointToPoint(false),
_up(false),
_running(false),
_mtu(0)
{
_addressList.push_back(AddressTuple(address, IPAddress(), IPAddress()));
setPhyParams();
if (pMACAddress) setMACAddress(*pMACAddress);
}
NetworkInterfaceImpl::NetworkInterfaceImpl(const std::string& name, const std::string& displayName, const std::string& adapterName, unsigned index, NetworkInterface::MACAddress* pMACAddress):
_name(name),
_displayName(displayName),
_adapterName(adapterName),
_index(index),
_broadcast(false),
_loopback(false),
_multicast(false),
_pointToPoint(false),
_up(false),
_running(false),
_mtu(0)
{
setPhyParams();
if (pMACAddress) setMACAddress(*pMACAddress);
}
NetworkInterfaceImpl::NetworkInterfaceImpl(const std::string& name,
const std::string& displayName,
const std::string& adapterName,
const IPAddress& address,
const IPAddress& subnetMask,
const IPAddress& broadcastAddress,
unsigned index,
NetworkInterface::MACAddress* pMACAddress):
_name(name),
_displayName(displayName),
_adapterName(adapterName),
_index(index),
_broadcast(false),
_loopback(false),
_multicast(false),
_pointToPoint(false),
_up(false),
_running(false),
_mtu(0)
{
_addressList.push_back(AddressTuple(address, subnetMask, broadcastAddress));
setPhyParams();
if (pMACAddress) setMACAddress(*pMACAddress);
}
void NetworkInterfaceImpl::setPhyParams()
{
#if !defined(POCO_OS_FAMILY_WINDOWS) && !defined(POCO_VXWORKS)
struct ifreq ifr;
std::strncpy(ifr.ifr_name, _name.c_str(), IFNAMSIZ);
DatagramSocket ds;
ds.impl()->ioctl(SIOCGIFFLAGS, &ifr);
setFlags(ifr.ifr_flags);
ds.impl()->ioctl(SIOCGIFMTU, &ifr);
setMTU(ifr.ifr_mtu);
#endif
}
NetworkInterfaceImpl::~NetworkInterfaceImpl()
{
}
bool NetworkInterfaceImpl::supportsIPv4() const
{
AddressList::const_iterator it = _addressList.begin();
AddressList::const_iterator end = _addressList.end();
for (; it != end; ++it)
{
if (IPAddress::IPv4 == it->get<NetworkInterface::IP_ADDRESS>().family())
return true;
}
return false;
}
bool NetworkInterfaceImpl::supportsIPv6() const
{
#ifdef POCO_HAVE_IPv6
AddressList::const_iterator it = _addressList.begin();
AddressList::const_iterator end = _addressList.end();
for (; it != end; ++it)
{
if (IPAddress::IPv6 == it->get<NetworkInterface::IP_ADDRESS>().family())
return true;
}
#endif
return false;
}
inline unsigned NetworkInterfaceImpl::index() const
{
return _index;
}
inline const std::string& NetworkInterfaceImpl::name() const
{
return _name;
}
inline const std::string& NetworkInterfaceImpl::displayName() const
{
return _displayName;
}
inline const std::string& NetworkInterfaceImpl::adapterName() const
{
return _adapterName;
}
const IPAddress& NetworkInterfaceImpl::firstAddress(IPAddress::Family family) const
{
AddressList::const_iterator it = _addressList.begin();
AddressList::const_iterator end = _addressList.end();
for (;it != end; ++it)
{
const IPAddress& addr = it->get<NetworkInterface::IP_ADDRESS>();
if (addr.family() == family) return addr;
}
throw NotFoundException(format("%s family address not found.", (family == IPAddress::IPv4) ? std::string("IPv4") : std::string("IPv6")));
}
inline void NetworkInterfaceImpl::addAddress(const AddressTuple& address)
{
_addressList.push_back(address);
}
bool NetworkInterfaceImpl::hasAddress(const IPAddress& address) const
{
NetworkInterface::ConstAddressIterator it = _addressList.begin();
NetworkInterface::ConstAddressIterator end = _addressList.end();
for (; it != end; ++it)
{
if (it->get<NetworkInterface::IP_ADDRESS>() == address)
return true;
}
return false;
}
inline const IPAddress& NetworkInterfaceImpl::address(unsigned index) const
{
if (index < _addressList.size()) return _addressList[index].get<NetworkInterface::IP_ADDRESS>();
else throw NotFoundException(Poco::format("No address with index %u.", index));
}
inline const NetworkInterface::AddressList& NetworkInterfaceImpl::addressList() const
{
return _addressList;
}
const IPAddress& NetworkInterfaceImpl::subnetMask(unsigned index) const
{
if (index < _addressList.size())
return _addressList[index].get<NetworkInterface::SUBNET_MASK>();
throw NotFoundException(Poco::format("No subnet mask with index %u.", index));
}
const IPAddress& NetworkInterfaceImpl::broadcastAddress(unsigned index) const
{
if (index < _addressList.size())
return _addressList[index].get<NetworkInterface::BROADCAST_ADDRESS>();
throw NotFoundException(Poco::format("No subnet mask with index %u.", index));
}
const IPAddress& NetworkInterfaceImpl::destAddress(unsigned index) const
{
if (!pointToPoint())
throw InvalidAccessException("Only PPP addresses have destination address.");
else if (index < _addressList.size())
return _addressList[index].get<NetworkInterface::BROADCAST_ADDRESS>();
throw NotFoundException(Poco::format("No address with index %u.", index));
}
const NetworkInterface::MACAddress& NetworkInterfaceImpl::macAddress() const
{
return _macAddress;
}
inline unsigned NetworkInterfaceImpl::mtu() const
{
return _mtu;
}
inline NetworkInterface::Type NetworkInterfaceImpl::type() const
{
return _type;
}
inline bool NetworkInterfaceImpl::broadcast() const
{
return _broadcast;
}
inline bool NetworkInterfaceImpl::loopback() const
{
return _loopback;
}
inline bool NetworkInterfaceImpl::multicast() const
{
return _multicast;
}
inline bool NetworkInterfaceImpl::pointToPoint() const
{
return _pointToPoint;
}
inline bool NetworkInterfaceImpl::running() const
{
return _running;
}
inline bool NetworkInterfaceImpl::up() const
{
return _up;
}
#if defined(POCO_OS_FAMILY_WINDOWS)
void NetworkInterfaceImpl::setFlags(DWORD flags, DWORD iftype)
{
_running = _up = false;
switch (iftype) {
case IF_TYPE_ETHERNET_CSMACD:
case IF_TYPE_ISO88025_TOKENRING:
case IF_TYPE_IEEE80211:
_multicast = _broadcast = true;
break;
case IF_TYPE_SOFTWARE_LOOPBACK:
_loopback = true;
break;
case IF_TYPE_PPP:
case IF_TYPE_ATM:
case IF_TYPE_TUNNEL:
case IF_TYPE_IEEE1394:
_pointToPoint = true;
break;
}
if (!(flags & IP_ADAPTER_NO_MULTICAST))
_multicast = true;
}
void NetworkInterfaceImpl::setRunning(bool running)
{
_running = running;
}
#else
void NetworkInterfaceImpl::setFlags(short flags)
{
#ifdef POCO_OS_FAMILY_UNIX
_broadcast = ((flags & IFF_BROADCAST) != 0);
_loopback = ((flags & IFF_LOOPBACK) != 0);
_multicast = ((flags & IFF_MULTICAST) != 0);
_pointToPoint = ((flags & IFF_POINTOPOINT) != 0);
_running = ((flags & IFF_RUNNING) != 0);
_up = ((flags & IFF_UP) != 0);
#endif
}
#endif
inline void NetworkInterfaceImpl::setUp(bool up)
{
_up = up;
}
inline void NetworkInterfaceImpl::setMTU(unsigned mtu)
{
_mtu = mtu;
}
inline void NetworkInterfaceImpl::setType(Type type)
{
_type = type;
}
inline void NetworkInterfaceImpl::setIndex(unsigned index)
{
_index = index;
}
inline void NetworkInterfaceImpl::setName(const std::string& name)
{
_name = name;
}
inline void NetworkInterfaceImpl::setDisplayName(const std::string& name)
{
_displayName = name;
}
inline void NetworkInterfaceImpl::setAdapterName(const std::string& name)
{
_adapterName = name;
}
inline void NetworkInterfaceImpl::addAddress(const IPAddress& addr)
{
_addressList.push_back(addr);
}
inline void NetworkInterfaceImpl::setMACAddress(const NetworkInterface::MACAddress& addr)
{
_macAddress = addr;
}
inline void NetworkInterfaceImpl::setMACAddress(const void *addr, std::size_t len)
{
_macAddress.clear();
for (unsigned i = 0; i < len; ++i)
_macAddress.push_back(((unsigned char *)addr)[i]);
}
//
// NetworkInterface
//
FastMutex NetworkInterface::_mutex;
NetworkInterface::NetworkInterface(unsigned index):
_pImpl(new NetworkInterfaceImpl(index))
{
}
NetworkInterface::NetworkInterface(const NetworkInterface& interfc):
_pImpl(interfc._pImpl)
{
_pImpl->duplicate();
}
NetworkInterface::NetworkInterface(const std::string& name, const std::string& displayName, const std::string& adapterName, const IPAddress& address, unsigned index, MACAddress* pMACAddress):
_pImpl(new NetworkInterfaceImpl(name, displayName, adapterName, address, index, pMACAddress))
{
}
NetworkInterface::NetworkInterface(const std::string& name, const std::string& displayName, const std::string& adapterName, unsigned index, MACAddress* pMACAddress):
_pImpl(new NetworkInterfaceImpl(name, displayName, adapterName, index, pMACAddress))
{
}
NetworkInterface::NetworkInterface(const std::string& name, const IPAddress& address, unsigned index, MACAddress* pMACAddress):
_pImpl(new NetworkInterfaceImpl(name, name, name, address, index, pMACAddress))
{
}
NetworkInterface::NetworkInterface(const std::string& name,
const std::string& displayName,
const std::string& adapterName,
const IPAddress& address,
const IPAddress& subnetMask,
const IPAddress& broadcastAddress,
unsigned index,
MACAddress* pMACAddress):
_pImpl(new NetworkInterfaceImpl(name, displayName, adapterName, address, subnetMask, broadcastAddress, index, pMACAddress))
{
}
NetworkInterface::NetworkInterface(const std::string& name,
const IPAddress& address,
const IPAddress& subnetMask,
const IPAddress& broadcastAddress,
unsigned index,
MACAddress* pMACAddress):
_pImpl(new NetworkInterfaceImpl(name, name, name, address, subnetMask, broadcastAddress, index, pMACAddress))
{
}
NetworkInterface::~NetworkInterface()
{
_pImpl->release();
}
NetworkInterface& NetworkInterface::operator = (const NetworkInterface& interfc)
{
NetworkInterface tmp(interfc);
swap(tmp);
return *this;
}
void NetworkInterface::swap(NetworkInterface& other)
{
using std::swap;
swap(_pImpl, other._pImpl);
}
unsigned NetworkInterface::index() const
{
return _pImpl->index();
}
const std::string& NetworkInterface::name() const
{
return _pImpl->name();
}
const std::string& NetworkInterface::displayName() const
{
return _pImpl->displayName();
}
const std::string& NetworkInterface::adapterName() const
{
return _pImpl->adapterName();
}
const IPAddress& NetworkInterface::firstAddress(IPAddress::Family family) const
{
return _pImpl->firstAddress(family);
}
void NetworkInterface::firstAddress(IPAddress& addr, IPAddress::Family family) const
{
try
{
addr = firstAddress(family);
}
catch (NotFoundException&)
{
addr = IPAddress(family);
}
}
void NetworkInterface::addAddress(const IPAddress& address)
{
_pImpl->addAddress(AddressTuple(address, IPAddress(), IPAddress()));
}
void NetworkInterface::addAddress(const IPAddress& address, const IPAddress& subnetMask, const IPAddress& broadcastAddress)
{
_pImpl->addAddress(AddressTuple(address, subnetMask, broadcastAddress));
}
const IPAddress& NetworkInterface::address(unsigned index) const
{
return _pImpl->address(index);
}
const NetworkInterface::AddressList& NetworkInterface::addressList() const
{
return _pImpl->addressList();
}
const IPAddress& NetworkInterface::subnetMask(unsigned index) const
{
return _pImpl->subnetMask(index);
}
const IPAddress& NetworkInterface::broadcastAddress(unsigned index) const
{
return _pImpl->broadcastAddress(index);
}
const NetworkInterface::MACAddress& NetworkInterface::macAddress() const
{
return _pImpl->macAddress();
}
const IPAddress& NetworkInterface::destAddress(unsigned index) const
{
return _pImpl->destAddress(index);
}
unsigned NetworkInterface::mtu() const
{
return _pImpl->mtu();
}
NetworkInterface::Type NetworkInterface::type() const
{
return _pImpl->type();
}
bool NetworkInterface::supportsIP() const
{
return _pImpl->supportsIPv4() || _pImpl->supportsIPv6();
}
bool NetworkInterface::supportsIPv4() const
{
return _pImpl->supportsIPv4();
}
bool NetworkInterface::supportsIPv6() const
{
return _pImpl->supportsIPv6();
}
bool NetworkInterface::supportsBroadcast() const
{
return _pImpl->broadcast();
}
bool NetworkInterface::supportsMulticast() const
{
return _pImpl->multicast();
}
bool NetworkInterface::isLoopback() const
{
return _pImpl->loopback();
}
bool NetworkInterface::isPointToPoint() const
{
return _pImpl->pointToPoint();
}
bool NetworkInterface::isRunning() const
{
return _pImpl->running();
}
bool NetworkInterface::isUp() const
{
return _pImpl->up();
}
NetworkInterface NetworkInterface::forName(const std::string& name, bool requireIPv6)
{
Map map = NetworkInterface::map(false, false);
Map::const_iterator it = map.begin();
Map::const_iterator end = map.end();
for (; it != end; ++it)
{
if (it->second.name() == name && ((requireIPv6 && it->second.supportsIPv6()) || !requireIPv6))
return it->second;
}
throw InterfaceNotFoundException(name);
}
NetworkInterface NetworkInterface::forName(const std::string& name, IPVersion ipVersion)
{
Map map = NetworkInterface::map(false, false);
Map::const_iterator it = map.begin();
Map::const_iterator end = map.end();
for (; it != end; ++it)
{
if (it->second.name() == name)
{
if (ipVersion == IPv4_ONLY && it->second.supportsIPv4())
return it->second;
else if (ipVersion == IPv6_ONLY && it->second.supportsIPv6())
return it->second;
else if (ipVersion == IPv4_OR_IPv6)
return it->second;
}
}
throw InterfaceNotFoundException(name);
}
NetworkInterface NetworkInterface::forAddress(const IPAddress& addr)
{
Map map = NetworkInterface::map(true, false);
Map::const_iterator it = map.begin();
Map::const_iterator end = map.end();
for (; it != end; ++it)
{
const std::size_t count = it->second.addressList().size();
for (int i = 0; i < count; ++i)
{
if (it->second.address(i) == addr)
return it->second;
}
}
throw InterfaceNotFoundException(addr.toString());
}
NetworkInterface NetworkInterface::forIndex(unsigned i)
{
if (i != NetworkInterface::NO_INDEX)
{
Map map = NetworkInterface::map(false, false);
Map::const_iterator it = map.find(i);
if (it != map.end())
return it->second;
else
throw InterfaceNotFoundException("#" + NumberFormatter::format(i));
}
throw InterfaceNotFoundException("#" + NumberFormatter::format(i));
}
NetworkInterface::List NetworkInterface::list(bool ipOnly, bool upOnly)
{
List list;
Map m = map(ipOnly, upOnly);
NetworkInterface::Map::const_iterator it = m.begin();
NetworkInterface::Map::const_iterator end = m.end();
for (; it != end; ++it)
{
int index = it->second.index();
std::string name = it->second.name();
std::string displayName = it->second.displayName();
std::string adapterName = it->second.adapterName();
NetworkInterface::MACAddress mac = it->second.macAddress();
typedef NetworkInterface::AddressList List;
const List& ipList = it->second.addressList();
List::const_iterator ipIt = ipList.begin();
List::const_iterator ipEnd = ipList.end();
for (int counter = 0; ipIt != ipEnd; ++ipIt, ++counter)
{
IPAddress addr = ipIt->get<NetworkInterface::IP_ADDRESS>();
IPAddress mask = ipIt->get<NetworkInterface::SUBNET_MASK>();
NetworkInterface ni;
if (mask.isWildcard())
ni = NetworkInterface(name, displayName, adapterName, addr, index, &mac);
else
{
IPAddress broadcast = ipIt->get<NetworkInterface::BROADCAST_ADDRESS>();
ni = NetworkInterface(name, displayName, adapterName, addr, mask, broadcast, index, &mac);
}
list.push_back(ni);
}
}
return list;
}
} } // namespace Poco::Net
//
// platform-specific code below
//
#if defined(POCO_OS_FAMILY_WINDOWS)
//
// Windows
//
#include "Poco/Buffer.h"
#include <iterator>
namespace Poco {
namespace Net {
namespace {
IPAddress getBroadcastAddress(PIP_ADAPTER_PREFIX pPrefix, const IPAddress& addr, ULONG* pprefix = 0)
/// This function relies on (1) subnet prefix being at the position
/// immediately preceding and (2) broadcast address being at the position
/// immediately succeeding the IPv4 unicast address.
///
/// Since there is no explicit guarantee on order, to ensure correctness,
/// the above constraints are checked prior to returning the result.
/// Additionally, on pre-Vista versions on Windows, the main structure does
/// not contain prefix length; for those platforms, this function
/// returns prefix through pprefix argument.
{
PIP_ADAPTER_PREFIX pPrev = 0;
for (int i = 0; pPrefix; pPrefix = pPrefix->Next, ++i)
{
ADDRESS_FAMILY family = pPrefix->Address.lpSockaddr->sa_family;
if ((family == AF_INET) && (addr == IPAddress(pPrefix->Address)))
break;
pPrev = pPrefix;
}
if (pPrefix && pPrefix->Next && pPrev)
{
IPAddress ipPrefix(pPrev->PrefixLength, IPAddress::IPv4);
IPAddress mask(pPrefix->Next->Address);
if ((ipPrefix & mask) == (ipPrefix & addr))
{
if (pprefix) *pprefix = pPrefix->Length;
return IPAddress(pPrefix->Next->Address);
}
}
return IPAddress(IPAddress::IPv4);
}
NetworkInterface::Type fromNative(DWORD type)
{
switch (type)
{
case IF_TYPE_ETHERNET_CSMACD: return NetworkInterface::NI_TYPE_ETHERNET_CSMACD;
case IF_TYPE_ISO88025_TOKENRING: return NetworkInterface::NI_TYPE_ISO88025_TOKENRING;
case IF_TYPE_FRAMERELAY: return NetworkInterface::NI_TYPE_FRAMERELAY;
case IF_TYPE_PPP: return NetworkInterface::NI_TYPE_PPP;
case IF_TYPE_SOFTWARE_LOOPBACK: return NetworkInterface::NI_TYPE_SOFTWARE_LOOPBACK;
case IF_TYPE_ATM: return NetworkInterface::NI_TYPE_ATM;
case IF_TYPE_IEEE80211: return NetworkInterface::NI_TYPE_IEEE80211;
case IF_TYPE_TUNNEL: return NetworkInterface::NI_TYPE_TUNNEL;
case IF_TYPE_IEEE1394: return NetworkInterface::NI_TYPE_IEEE1394;
default: return NetworkInterface::NI_TYPE_OTHER;
}
}
} /// namespace
NetworkInterface::Map NetworkInterface::map(bool ipOnly, bool upOnly)
{
FastMutex::ScopedLock lock(_mutex);
Map result;
ULONG outBufLen = 16384;
Poco::Buffer<UCHAR> memory(outBufLen);
ULONG flags = (GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_INCLUDE_PREFIX);
#ifdef GAA_FLAG_INCLUDE_ALL_INTERFACES
flags |= GAA_FLAG_INCLUDE_ALL_INTERFACES;
#endif
#if defined(POCO_HAVE_IPv6)
const unsigned family = AF_UNSPEC; //IPv4 and IPv6
#else
const unsigned family = AF_INET; //IPv4 only
#endif
DWORD dwRetVal = 0;
ULONG iterations = 0;
PIP_ADAPTER_ADDRESSES pAddress = 0;
do
{
pAddress = reinterpret_cast<IP_ADAPTER_ADDRESSES*>(memory.begin()); // leave in the loop, begin may change after resize
poco_assert (memory.capacity() >= outBufLen);
if (ERROR_BUFFER_OVERFLOW == (dwRetVal = GetAdaptersAddresses(family, flags, 0, pAddress, &outBufLen)))
memory.resize(outBufLen, false); // adjust size and try again
else if (ERROR_NO_DATA == dwRetVal) // no network interfaces found
return result;
else if (NO_ERROR != dwRetVal) // error occurred
throw SystemException(format("An error occurred while trying to obtain list of network interfaces: [%s]", Error::getMessage(dwRetVal)));
else