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-rw-r--r--src/common/Asio/AsioHacksFwd.h5
-rw-r--r--src/common/Asio/IpAddress.h1
-rw-r--r--src/common/Asio/IpNetwork.cpp284
-rw-r--r--src/common/Asio/IpNetwork.h44
4 files changed, 303 insertions, 31 deletions
diff --git a/src/common/Asio/AsioHacksFwd.h b/src/common/Asio/AsioHacksFwd.h
index 6030436d39d..a8f04b16d81 100644
--- a/src/common/Asio/AsioHacksFwd.h
+++ b/src/common/Asio/AsioHacksFwd.h
@@ -38,6 +38,11 @@ namespace boost
namespace ip
{
class address;
+ class address_v4;
+ class address_v6;
+
+ class network_v4;
+ class network_v6;
class tcp;
diff --git a/src/common/Asio/IpAddress.h b/src/common/Asio/IpAddress.h
index 30500d662c6..22af8bbfd41 100644
--- a/src/common/Asio/IpAddress.h
+++ b/src/common/Asio/IpAddress.h
@@ -27,6 +27,7 @@ namespace Trinity
{
using boost::asio::ip::make_address;
using boost::asio::ip::make_address_v4;
+ using boost::asio::ip::make_address_v6;
inline uint32 address_to_uint(boost::asio::ip::address_v4 const& address) { return address.to_uint(); }
}
}
diff --git a/src/common/Asio/IpNetwork.cpp b/src/common/Asio/IpNetwork.cpp
new file mode 100644
index 00000000000..5e5dcb9ac22
--- /dev/null
+++ b/src/common/Asio/IpNetwork.cpp
@@ -0,0 +1,284 @@
+/*
+ * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "IpNetwork.h"
+#include "IpAddress.h"
+#include <boost/asio/ip/network_v4.hpp>
+#include <boost/asio/ip/network_v6.hpp>
+
+namespace
+{
+std::vector<boost::asio::ip::network_v4> LocalV4Networks;
+std::vector<boost::asio::ip::network_v6> LocalV6Networks;
+}
+
+namespace Trinity::Net
+{
+bool IsInLocalNetwork(boost::asio::ip::address const& clientAddress)
+{
+ if (clientAddress.is_v4())
+ {
+ return std::any_of(LocalV4Networks.begin(), LocalV4Networks.end(), [clientAddressV4 = clientAddress.to_v4()](boost::asio::ip::network_v4 const& network)
+ {
+ return IsInNetwork(network, clientAddressV4);
+ });
+ }
+
+ if (clientAddress.is_v6())
+ {
+ return std::any_of(LocalV6Networks.begin(), LocalV6Networks.end(), [clientAddressV6 = clientAddress.to_v6()](boost::asio::ip::network_v6 const& network)
+ {
+ return IsInNetwork(network, clientAddressV6);
+ });
+ }
+
+ return false;
+};
+
+bool IsInNetwork(boost::asio::ip::network_v4 const& network, boost::asio::ip::address_v4 const& clientAddress)
+{
+ if (clientAddress == network.address())
+ return true;
+
+ boost::asio::ip::network_v4 endpointAsNetwork = boost::asio::ip::make_network_v4(clientAddress, 32);
+ return endpointAsNetwork.is_subnet_of(network);
+}
+
+bool IsInNetwork(boost::asio::ip::network_v6 const& network, boost::asio::ip::address_v6 const& clientAddress)
+{
+ if (clientAddress == network.address())
+ return true;
+
+ boost::asio::ip::network_v6 endpointAsNetwork = boost::asio::ip::make_network_v6(clientAddress, 128);
+ return endpointAsNetwork.is_subnet_of(network);
+}
+
+Optional<std::size_t> SelectAddressForClient(boost::asio::ip::address const& clientAddress, std::span<boost::asio::ip::address> const& addresses)
+{
+ Optional<std::size_t> localIpv6Index;
+ Optional<std::size_t> externalIpv6Index;
+ Optional<std::size_t> loopbackIpv6Index;
+ Optional<std::size_t> localIpv4Index;
+ Optional<std::size_t> externalIpv4Index;
+ Optional<std::size_t> loopbackIpv4Index;
+
+ for (std::size_t i = 0; i < addresses.size(); ++i)
+ {
+ boost::asio::ip::address const& address = addresses[i];
+
+ if (IsInLocalNetwork(address))
+ {
+ if (address.is_v6() && !localIpv6Index)
+ localIpv6Index = i;
+
+ if (address.is_v4() && !localIpv4Index)
+ localIpv4Index = i;
+ }
+ else
+ {
+ if (address.is_v6() && !externalIpv6Index)
+ externalIpv6Index = i;
+
+ if (address.is_v4() && !externalIpv4Index)
+ externalIpv4Index = i;
+ }
+
+ if (address.is_loopback())
+ {
+ if (address.is_v6() && !loopbackIpv6Index)
+ loopbackIpv6Index = i;
+
+ if (address.is_v4() && !loopbackIpv4Index)
+ loopbackIpv4Index = i;
+ }
+ }
+
+ if (IsInLocalNetwork(clientAddress) || clientAddress.is_loopback())
+ {
+ // client is in the same network as this process, prefer local addresses
+
+ // first, try finding a local ipv6 address
+ if (clientAddress.is_v6() && localIpv6Index)
+ {
+ // we have a usable ipv6 local address
+ return localIpv6Index;
+ }
+
+ // we dont have a local v6, return local v4
+ if (localIpv4Index)
+ return localIpv4Index;
+ }
+
+ if (clientAddress.is_loopback())
+ {
+ // fallback, search for a loopback address in configuration
+ if (clientAddress.is_v6() && loopbackIpv6Index)
+ return loopbackIpv6Index;
+
+ if (loopbackIpv4Index)
+ return loopbackIpv4Index;
+ }
+
+ // client is NOT in the same network as this process
+ if (clientAddress.is_v6() && externalIpv6Index)
+ return externalIpv6Index;
+
+ return externalIpv4Index;
+}
+}
+
+#if TRINITY_PLATFORM == TRINITY_PLATFORM_WINDOWS
+
+#include <boost/dll/shared_library.hpp>
+#include <iphlpapi.h>
+
+void Trinity::Net::ScanLocalNetworks()
+{
+ LocalV4Networks.clear();
+ LocalV6Networks.clear();
+
+ boost::system::error_code dllError;
+ boost::dll::shared_library iphlp("Iphlpapi.dll", dllError, boost::dll::load_mode::search_system_folders);
+ if (dllError || !iphlp.is_loaded())
+ return;
+
+ auto getAdaptersAddresses = iphlp.get<decltype(GetAdaptersAddresses)>("GetAdaptersAddresses");
+ if (!getAdaptersAddresses)
+ return;
+
+ ULONG queryFlags = GAA_FLAG_SKIP_UNICAST | GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_INCLUDE_PREFIX | GAA_FLAG_SKIP_FRIENDLY_NAME;
+ ULONG bufferSize = 0;
+
+ if (getAdaptersAddresses(AF_UNSPEC, queryFlags, nullptr, nullptr, &bufferSize) != ERROR_BUFFER_OVERFLOW)
+ return;
+
+ std::unique_ptr<std::byte[]> addressesBuffer = std::make_unique<std::byte[]>(bufferSize);
+ if (getAdaptersAddresses(AF_UNSPEC, queryFlags, nullptr, reinterpret_cast<IP_ADAPTER_ADDRESSES*>(addressesBuffer.get()), &bufferSize) != ERROR_SUCCESS)
+ return;
+
+ for (IP_ADAPTER_ADDRESSES* itr = reinterpret_cast<IP_ADAPTER_ADDRESSES*>(addressesBuffer.get()); itr; itr = itr->Next)
+ {
+ if (itr->IfType == IF_TYPE_SOFTWARE_LOOPBACK)
+ continue;
+
+ if (itr->OperStatus != IfOperStatusUp)
+ continue;
+
+ for (IP_ADAPTER_PREFIX_XP* prefix = itr->FirstPrefix; prefix; prefix = prefix->Next)
+ {
+ switch (prefix->Address.lpSockaddr->sa_family)
+ {
+ case AF_INET:
+ {
+ SOCKADDR_IN* ipv4raw = reinterpret_cast<SOCKADDR_IN*>(prefix->Address.lpSockaddr);
+ boost::asio::ip::address_v4::bytes_type addressBytes;
+ std::memcpy(addressBytes.data(), &ipv4raw->sin_addr.s_addr, addressBytes.size());
+ boost::asio::ip::address_v4 address = make_address_v4(addressBytes);
+ if (address.is_unspecified() || address.is_multicast() || address == boost::asio::ip::address_v4::broadcast())
+ continue;
+
+ LocalV4Networks.push_back(boost::asio::ip::make_network_v4(address, prefix->PrefixLength));
+ break;
+ }
+ case AF_INET6:
+ {
+ SOCKADDR_IN6* ipv6raw = reinterpret_cast<SOCKADDR_IN6*>(prefix->Address.lpSockaddr);
+ boost::asio::ip::address_v6::bytes_type addressBytes;
+ std::memcpy(addressBytes.data(), ipv6raw->sin6_addr.s6_addr, addressBytes.size());
+ boost::asio::ip::address_v6 address = make_address_v6(addressBytes, ipv6raw->sin6_scope_id);
+ if (address.is_unspecified() || address.is_multicast())
+ continue;
+
+ LocalV6Networks.push_back(boost::asio::ip::make_network_v6(address, prefix->PrefixLength));
+ break;
+ }
+ default:
+ break;
+ }
+ }
+ }
+}
+
+#else
+
+#include <numeric>
+#include <ifaddrs.h>
+
+void Trinity::Net::ScanLocalNetworks()
+{
+ LocalV4Networks.clear();
+ LocalV6Networks.clear();
+
+ ifaddrs* addressesLinkedList = nullptr;
+ if (getifaddrs(&addressesLinkedList) == -1)
+ return;
+
+ for (ifaddrs* itr = addressesLinkedList; itr; itr = itr->ifa_next)
+ {
+ if (!itr->ifa_addr)
+ continue;
+
+ switch (itr->ifa_addr->sa_family)
+ {
+ case AF_INET:
+ {
+ sockaddr_in* ipv4raw = reinterpret_cast<sockaddr_in*>(itr->ifa_addr);
+ boost::asio::ip::address_v4::bytes_type addressBytes;
+ std::memcpy(addressBytes.data(), &ipv4raw->sin_addr.s_addr, addressBytes.size());
+ boost::asio::ip::address_v4 address = make_address_v4(addressBytes);
+ if (address.is_unspecified() || address.is_loopback() || address.is_multicast() || address == boost::asio::ip::address_v4::broadcast())
+ continue;
+
+ if (sockaddr_in* netmask4raw = reinterpret_cast<sockaddr_in*>(itr->ifa_netmask))
+ {
+ boost::asio::ip::address_v4::bytes_type netmaskBytes;
+ std::memcpy(netmaskBytes.data(), &netmask4raw->sin_addr.s_addr, netmaskBytes.size());
+ boost::asio::ip::address_v4 netmask = make_address_v4(netmaskBytes);
+ LocalV4Networks.push_back(boost::asio::ip::make_network_v4(address, netmask));
+ }
+ else
+ LocalV4Networks.push_back(boost::asio::ip::make_network_v4(address, 32));
+ break;
+ }
+ case AF_INET6:
+ {
+ sockaddr_in6* ipv6raw = reinterpret_cast<sockaddr_in6*>(itr->ifa_addr);
+ boost::asio::ip::address_v6::bytes_type addressBytes;
+ std::memcpy(addressBytes.data(), ipv6raw->sin6_addr.s6_addr, addressBytes.size());
+ boost::asio::ip::address_v6 address = make_address_v6(addressBytes, ipv6raw->sin6_scope_id);
+ if (address.is_unspecified() || address.is_loopback() || address.is_multicast())
+ continue;
+
+ if (sockaddr_in6* netmask6raw = reinterpret_cast<sockaddr_in6*>(itr->ifa_netmask))
+ {
+ int32 prefixLength = 0;
+ for (uint8 addressByte : netmask6raw->sin6_addr.s6_addr)
+ prefixLength += std::countl_one(addressByte);
+
+ LocalV6Networks.push_back(boost::asio::ip::make_network_v6(address, prefixLength));
+ }
+ else
+ LocalV6Networks.push_back(boost::asio::ip::make_network_v6(address, 128));
+ break;
+ }
+ }
+ }
+
+ freeifaddrs(addressesLinkedList);
+}
+
+#endif
diff --git a/src/common/Asio/IpNetwork.h b/src/common/Asio/IpNetwork.h
index 294532c5c78..242c344fc15 100644
--- a/src/common/Asio/IpNetwork.h
+++ b/src/common/Asio/IpNetwork.h
@@ -18,40 +18,22 @@
#ifndef IpNetwork_h__
#define IpNetwork_h__
+#include "AsioHacksFwd.h"
#include "Define.h"
-#include "IpAddress.h"
-#include <boost/asio/ip/network_v4.hpp>
-#include <boost/asio/ip/network_v6.hpp>
+#include "Optional.h"
+#include <span>
-namespace Trinity
+namespace Trinity::Net
{
- namespace Net
- {
- inline bool IsInNetwork(boost::asio::ip::address_v4 const& networkAddress, boost::asio::ip::address_v4 const& mask, boost::asio::ip::address_v4 const& clientAddress)
- {
- boost::asio::ip::network_v4 network = boost::asio::ip::make_network_v4(networkAddress, mask);
- boost::asio::ip::address_v4_range hosts = network.hosts();
- return hosts.find(clientAddress) != hosts.end();
- }
-
- inline boost::asio::ip::address_v4 GetDefaultNetmaskV4(boost::asio::ip::address_v4 const& networkAddress)
- {
- if ((address_to_uint(networkAddress) & 0x80000000) == 0)
- return boost::asio::ip::address_v4(0xFF000000);
- if ((address_to_uint(networkAddress) & 0xC0000000) == 0x80000000)
- return boost::asio::ip::address_v4(0xFFFF0000);
- if ((address_to_uint(networkAddress) & 0xE0000000) == 0xC0000000)
- return boost::asio::ip::address_v4(0xFFFFFF00);
- return boost::asio::ip::address_v4(0xFFFFFFFF);
- }
-
- inline bool IsInNetwork(boost::asio::ip::address_v6 const& networkAddress, uint16 prefixLength, boost::asio::ip::address_v6 const& clientAddress)
- {
- boost::asio::ip::network_v6 network = boost::asio::ip::make_network_v6(networkAddress, prefixLength);
- boost::asio::ip::address_v6_range hosts = network.hosts();
- return hosts.find(clientAddress) != hosts.end();
- }
- }
+TC_COMMON_API bool IsInLocalNetwork(boost::asio::ip::address const& clientAddress);
+
+TC_COMMON_API bool IsInNetwork(boost::asio::ip::network_v4 const& network, boost::asio::ip::address_v4 const& clientAddress);
+
+TC_COMMON_API bool IsInNetwork(boost::asio::ip::network_v6 const& network, boost::asio::ip::address_v6 const& clientAddress);
+
+TC_COMMON_API Optional<std::size_t> SelectAddressForClient(boost::asio::ip::address const& clientAddress, std::span<boost::asio::ip::address> const& addresses);
+
+TC_COMMON_API void ScanLocalNetworks();
}
#endif // IpNetwork_h__