mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2024-11-17 21:26:04 +00:00
a51ef0cfc6
* [webconsole] change error handling code to restart acceptor after any error * [webconsole] call shutdown vefore stopping acceptor on exit * update license headers for modified files, change year to file creation year, not 2013 (when project started) Signed-off-by: R4SAS <r4sas@i2pmail.org>
586 lines
16 KiB
C++
586 lines
16 KiB
C++
/*
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* Copyright (c) 2013-2022, The PurpleI2P Project
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*
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* This file is part of Purple i2pd project and licensed under BSD3
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*
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* See full license text in LICENSE file at top of project tree
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*/
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#include <cstdlib>
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#include <string>
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#include <boost/asio.hpp>
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#include "util.h"
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#include "Log.h"
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#if not defined (__FreeBSD__)
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#include <pthread.h>
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#endif
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#if defined(__OpenBSD__) || defined(__FreeBSD__)
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#include <pthread_np.h>
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#endif
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#ifdef _WIN32
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <sysinfoapi.h>
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#include <iphlpapi.h>
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#include <shlobj.h>
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#ifdef _MSC_VER
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#pragma comment(lib, "IPHLPAPI.lib")
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#endif // _MSC_VER
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#define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x))
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#define FREE(x) HeapFree(GetProcessHeap(), 0, (x))
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// inet_pton exists Windows since Vista, but XP doesn't have that function!
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// This function was written by Petar Korponai?. See http://stackoverflow.com/questions/15660203/inet-pton-identifier-not-found
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int inet_pton_xp (int af, const char *src, void *dst)
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{
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struct sockaddr_storage ss;
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int size = sizeof (ss);
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char src_copy[INET6_ADDRSTRLEN + 1];
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ZeroMemory (&ss, sizeof (ss));
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strncpy (src_copy, src, INET6_ADDRSTRLEN + 1);
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src_copy[INET6_ADDRSTRLEN] = 0;
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if (WSAStringToAddress (src_copy, af, NULL, (struct sockaddr *)&ss, &size) == 0)
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{
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switch (af)
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{
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case AF_INET:
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*(struct in_addr *)dst = ((struct sockaddr_in *)&ss)->sin_addr;
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return 1;
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case AF_INET6:
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*(struct in6_addr *)dst = ((struct sockaddr_in6 *)&ss)->sin6_addr;
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return 1;
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}
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}
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return 0;
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}
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#else /* !_WIN32 => UNIX */
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#include <sys/types.h>
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#ifdef ANDROID
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#include "ifaddrs.h"
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#else
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#include <ifaddrs.h>
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#endif
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#endif
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#define address_pair_v4(a,b) { boost::asio::ip::address_v4::from_string (a).to_ulong (), boost::asio::ip::address_v4::from_string (b).to_ulong () }
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#define address_pair_v6(a,b) { boost::asio::ip::address_v6::from_string (a).to_bytes (), boost::asio::ip::address_v6::from_string (b).to_bytes () }
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namespace i2p
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{
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namespace util
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{
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void RunnableService::StartIOService ()
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{
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if (!m_IsRunning)
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{
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m_IsRunning = true;
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m_Thread.reset (new std::thread (std::bind (& RunnableService::Run, this)));
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}
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}
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void RunnableService::StopIOService ()
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{
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if (m_IsRunning)
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{
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m_IsRunning = false;
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m_Service.stop ();
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if (m_Thread)
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{
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m_Thread->join ();
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m_Thread = nullptr;
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}
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}
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}
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void RunnableService::Run ()
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{
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SetThreadName(m_Name.c_str());
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while (m_IsRunning)
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{
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try
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{
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m_Service.run ();
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}
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catch (std::exception& ex)
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{
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LogPrint (eLogError, m_Name, ": Runtime exception: ", ex.what ());
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}
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}
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}
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void SetThreadName (const char *name) {
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#if defined(__APPLE__) && !defined(__powerpc__)
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pthread_setname_np((char*)name);
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#elif defined(__FreeBSD__) || defined(__OpenBSD__)
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pthread_set_name_np(pthread_self(), name);
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#elif defined(__NetBSD__)
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pthread_setname_np(pthread_self(), "%s", (void *)name);
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#elif !defined(__gnu_hurd__)
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pthread_setname_np(pthread_self(), name);
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#endif
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}
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namespace net
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{
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#ifdef _WIN32
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bool IsWindowsXPorLater ()
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{
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static bool isRequested = false;
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static bool isXP = false;
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if (!isRequested)
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{
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// request
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OSVERSIONINFO osvi;
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ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
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osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
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GetVersionEx(&osvi);
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isXP = osvi.dwMajorVersion <= 5;
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isRequested = true;
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}
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return isXP;
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}
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int GetMTUWindowsIpv4 (sockaddr_in inputAddress, int fallback)
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{
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ULONG outBufLen = 0;
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PIP_ADAPTER_ADDRESSES pAddresses = nullptr;
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PIP_ADAPTER_ADDRESSES pCurrAddresses = nullptr;
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PIP_ADAPTER_UNICAST_ADDRESS pUnicast = nullptr;
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if(GetAdaptersAddresses(AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen)
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== ERROR_BUFFER_OVERFLOW)
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{
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FREE(pAddresses);
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pAddresses = (IP_ADAPTER_ADDRESSES*) MALLOC(outBufLen);
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}
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DWORD dwRetVal = GetAdaptersAddresses(
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AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen
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);
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if(dwRetVal != NO_ERROR)
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{
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LogPrint(eLogError, "NetIface: GetMTU(): Enclosed GetAdaptersAddresses() call has failed");
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FREE(pAddresses);
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return fallback;
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}
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pCurrAddresses = pAddresses;
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while(pCurrAddresses)
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{
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PIP_ADAPTER_UNICAST_ADDRESS firstUnicastAddress = pCurrAddresses->FirstUnicastAddress;
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pUnicast = pCurrAddresses->FirstUnicastAddress;
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if(pUnicast == nullptr)
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LogPrint(eLogError, "NetIface: GetMTU(): Not a unicast IPv4 address, this is not supported");
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for(int i = 0; pUnicast != nullptr; ++i)
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{
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LPSOCKADDR lpAddr = pUnicast->Address.lpSockaddr;
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sockaddr_in* localInterfaceAddress = (sockaddr_in*) lpAddr;
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if(localInterfaceAddress->sin_addr.S_un.S_addr == inputAddress.sin_addr.S_un.S_addr)
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{
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auto result = pAddresses->Mtu;
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FREE(pAddresses);
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return result;
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}
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pUnicast = pUnicast->Next;
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}
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pCurrAddresses = pCurrAddresses->Next;
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}
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LogPrint(eLogError, "NetIface: GetMTU(): No usable unicast IPv4 addresses found");
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FREE(pAddresses);
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return fallback;
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}
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int GetMTUWindowsIpv6 (sockaddr_in6 inputAddress, int fallback)
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{
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ULONG outBufLen = 0;
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PIP_ADAPTER_ADDRESSES pAddresses = nullptr;
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PIP_ADAPTER_ADDRESSES pCurrAddresses = nullptr;
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PIP_ADAPTER_UNICAST_ADDRESS pUnicast = nullptr;
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if(GetAdaptersAddresses(AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen)
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== ERROR_BUFFER_OVERFLOW)
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{
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FREE(pAddresses);
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pAddresses = (IP_ADAPTER_ADDRESSES*) MALLOC(outBufLen);
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}
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DWORD dwRetVal = GetAdaptersAddresses(
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AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen
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);
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if(dwRetVal != NO_ERROR)
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{
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LogPrint(eLogError, "NetIface: GetMTU(): Enclosed GetAdaptersAddresses() call has failed");
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FREE(pAddresses);
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return fallback;
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}
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bool found_address = false;
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pCurrAddresses = pAddresses;
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while(pCurrAddresses)
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{
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PIP_ADAPTER_UNICAST_ADDRESS firstUnicastAddress = pCurrAddresses->FirstUnicastAddress;
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pUnicast = pCurrAddresses->FirstUnicastAddress;
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if(pUnicast == nullptr)
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LogPrint(eLogError, "NetIface: GetMTU(): Not a unicast IPv6 address, this is not supported");
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for(int i = 0; pUnicast != nullptr; ++i)
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{
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LPSOCKADDR lpAddr = pUnicast->Address.lpSockaddr;
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sockaddr_in6 *localInterfaceAddress = (sockaddr_in6*) lpAddr;
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for (int j = 0; j != 8; ++j)
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{
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if (localInterfaceAddress->sin6_addr.u.Word[j] != inputAddress.sin6_addr.u.Word[j])
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break;
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else
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found_address = true;
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}
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if (found_address)
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{
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auto result = pAddresses->Mtu;
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FREE(pAddresses);
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pAddresses = nullptr;
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return result;
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}
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pUnicast = pUnicast->Next;
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}
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pCurrAddresses = pCurrAddresses->Next;
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}
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LogPrint(eLogError, "NetIface: GetMTU(): No usable unicast IPv6 addresses found");
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FREE(pAddresses);
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return fallback;
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}
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int GetMTUWindows (const boost::asio::ip::address& localAddress, int fallback)
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{
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#ifdef UNICODE
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string localAddress_temporary = localAddress.to_string();
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wstring localAddressUniversal(localAddress_temporary.begin(), localAddress_temporary.end());
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#else
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std::string localAddressUniversal = localAddress.to_string();
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#endif
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typedef int (* IPN)(int af, const char *src, void *dst);
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IPN inetpton = (IPN)GetProcAddress (GetModuleHandle ("ws2_32.dll"), "InetPton");
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if (!inetpton) inetpton = inet_pton_xp; // use own implementation if not found
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if(localAddress.is_v4())
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{
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sockaddr_in inputAddress;
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inetpton(AF_INET, localAddressUniversal.c_str(), &(inputAddress.sin_addr));
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return GetMTUWindowsIpv4(inputAddress, fallback);
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}
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else if(localAddress.is_v6())
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{
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sockaddr_in6 inputAddress;
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inetpton(AF_INET6, localAddressUniversal.c_str(), &(inputAddress.sin6_addr));
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return GetMTUWindowsIpv6(inputAddress, fallback);
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}
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else
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{
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LogPrint(eLogError, "NetIface: GetMTU(): Address family is not supported");
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return fallback;
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}
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}
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#else // assume unix
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int GetMTUUnix (const boost::asio::ip::address& localAddress, int fallback)
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{
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ifaddrs* ifaddr, *ifa = nullptr;
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if(getifaddrs(&ifaddr) == -1)
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{
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LogPrint(eLogError, "NetIface: Can't call getifaddrs(): ", strerror(errno));
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return fallback;
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}
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int family = 0;
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// look for interface matching local address
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for(ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next)
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{
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if(!ifa->ifa_addr)
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continue;
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family = ifa->ifa_addr->sa_family;
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if(family == AF_INET && localAddress.is_v4())
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{
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sockaddr_in* sa = (sockaddr_in*) ifa->ifa_addr;
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if(!memcmp(&sa->sin_addr, localAddress.to_v4().to_bytes().data(), 4))
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break; // address matches
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}
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else if(family == AF_INET6 && localAddress.is_v6())
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{
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sockaddr_in6* sa = (sockaddr_in6*) ifa->ifa_addr;
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if(!memcmp(&sa->sin6_addr, localAddress.to_v6().to_bytes().data(), 16))
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break; // address matches
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}
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}
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int mtu = fallback;
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if(ifa && family)
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{ // interface found?
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int fd = socket(family, SOCK_DGRAM, 0);
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if(fd > 0)
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{
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ifreq ifr;
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strncpy(ifr.ifr_name, ifa->ifa_name, IFNAMSIZ-1); // set interface for query
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if(ioctl(fd, SIOCGIFMTU, &ifr) >= 0)
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mtu = ifr.ifr_mtu; // MTU
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else
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LogPrint (eLogError, "NetIface: Failed to run ioctl: ", strerror(errno));
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close(fd);
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}
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else
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LogPrint(eLogError, "NetIface: Failed to create datagram socket");
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}
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else
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LogPrint(eLogWarning, "NetIface: Interface for local address", localAddress.to_string(), " not found");
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freeifaddrs(ifaddr);
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return mtu;
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}
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#endif // _WIN32
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int GetMTU (const boost::asio::ip::address& localAddress)
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{
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int fallback = localAddress.is_v6 () ? 1280 : 620; // fallback MTU
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#ifdef _WIN32
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return GetMTUWindows(localAddress, fallback);
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#else
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return GetMTUUnix(localAddress, fallback);
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#endif
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return fallback;
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}
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const boost::asio::ip::address GetInterfaceAddress (const std::string & ifname, bool ipv6)
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{
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#ifdef _WIN32
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LogPrint(eLogError, "NetIface: Cannot get address by interface name, not implemented on WIN32");
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if(ipv6)
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return boost::asio::ip::address::from_string("::1");
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else
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return boost::asio::ip::address::from_string("127.0.0.1");
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#else
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int af = (ipv6 ? AF_INET6 : AF_INET);
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ifaddrs *addrs;
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try
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{
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if (!getifaddrs(&addrs))
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{
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for (auto cur = addrs; cur; cur = cur->ifa_next)
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{
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std::string cur_ifname(cur->ifa_name);
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if (cur_ifname == ifname && cur->ifa_addr && cur->ifa_addr->sa_family == af)
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{
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// match
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char addr[INET6_ADDRSTRLEN];
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memset (addr, 0, INET6_ADDRSTRLEN);
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if(af == AF_INET)
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inet_ntop(af, &((sockaddr_in *)cur->ifa_addr)->sin_addr, addr, INET6_ADDRSTRLEN);
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else
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inet_ntop(af, &((sockaddr_in6 *)cur->ifa_addr)->sin6_addr, addr, INET6_ADDRSTRLEN);
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freeifaddrs(addrs);
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std::string cur_ifaddr(addr);
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return boost::asio::ip::address::from_string(cur_ifaddr);
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}
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}
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}
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}
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catch (std::exception& ex)
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{
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LogPrint(eLogError, "NetIface: Exception while searching address using ifaddr: ", ex.what());
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}
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if(addrs) freeifaddrs(addrs);
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std::string fallback;
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if(ipv6)
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{
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fallback = "::1";
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LogPrint(eLogWarning, "NetIface: Cannot find IPv6 address for interface ", ifname);
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} else {
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fallback = "127.0.0.1";
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LogPrint(eLogWarning, "NetIface: Cannot find IPv4 address for interface ", ifname);
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}
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return boost::asio::ip::address::from_string(fallback);
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#endif
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}
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static bool IsYggdrasilAddress (const uint8_t addr[16])
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{
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return addr[0] == 0x02 || addr[0] == 0x03;
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}
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bool IsYggdrasilAddress (const boost::asio::ip::address& addr)
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{
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if (!addr.is_v6 ()) return false;
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return IsYggdrasilAddress (addr.to_v6 ().to_bytes ().data ());
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}
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boost::asio::ip::address_v6 GetYggdrasilAddress ()
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{
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#if defined(_WIN32)
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ULONG outBufLen = 0;
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PIP_ADAPTER_ADDRESSES pAddresses = nullptr;
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PIP_ADAPTER_ADDRESSES pCurrAddresses = nullptr;
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PIP_ADAPTER_UNICAST_ADDRESS pUnicast = nullptr;
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if(GetAdaptersAddresses(AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen)
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== ERROR_BUFFER_OVERFLOW)
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{
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FREE(pAddresses);
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pAddresses = (IP_ADAPTER_ADDRESSES*) MALLOC(outBufLen);
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}
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DWORD dwRetVal = GetAdaptersAddresses(
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AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen
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);
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if(dwRetVal != NO_ERROR)
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{
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LogPrint(eLogError, "NetIface: GetYggdrasilAddress(): enclosed GetAdaptersAddresses() call has failed");
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FREE(pAddresses);
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return boost::asio::ip::address_v6 ();
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}
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pCurrAddresses = pAddresses;
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while(pCurrAddresses)
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{
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PIP_ADAPTER_UNICAST_ADDRESS firstUnicastAddress = pCurrAddresses->FirstUnicastAddress;
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pUnicast = pCurrAddresses->FirstUnicastAddress;
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for(int i = 0; pUnicast != nullptr; ++i)
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{
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LPSOCKADDR lpAddr = pUnicast->Address.lpSockaddr;
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sockaddr_in6 *localInterfaceAddress = (sockaddr_in6*) lpAddr;
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if (IsYggdrasilAddress(localInterfaceAddress->sin6_addr.u.Byte)) {
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boost::asio::ip::address_v6::bytes_type bytes;
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memcpy (bytes.data (), &localInterfaceAddress->sin6_addr.u.Byte, 16);
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FREE(pAddresses);
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return boost::asio::ip::address_v6 (bytes);
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}
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pUnicast = pUnicast->Next;
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}
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pCurrAddresses = pCurrAddresses->Next;
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}
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LogPrint(eLogWarning, "NetIface: Interface with Yggdrasil network address not found");
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FREE(pAddresses);
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return boost::asio::ip::address_v6 ();
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#else
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ifaddrs *addrs;
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try
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{
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if (!getifaddrs(&addrs))
|
|
{
|
|
for (auto cur = addrs; cur; cur = cur->ifa_next)
|
|
{
|
|
if (cur->ifa_addr && cur->ifa_addr->sa_family == AF_INET6)
|
|
{
|
|
sockaddr_in6* sa = (sockaddr_in6*)cur->ifa_addr;
|
|
if (IsYggdrasilAddress(sa->sin6_addr.s6_addr))
|
|
{
|
|
boost::asio::ip::address_v6::bytes_type bytes;
|
|
memcpy (bytes.data (), &sa->sin6_addr, 16);
|
|
freeifaddrs(addrs);
|
|
return boost::asio::ip::address_v6 (bytes);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
catch (std::exception& ex)
|
|
{
|
|
LogPrint(eLogError, "NetIface: Exception while searching Yggdrasill address using ifaddr: ", ex.what());
|
|
}
|
|
LogPrint(eLogWarning, "NetIface: Interface with Yggdrasil network address not found");
|
|
if(addrs) freeifaddrs(addrs);
|
|
return boost::asio::ip::address_v6 ();
|
|
#endif
|
|
}
|
|
|
|
bool IsLocalAddress (const boost::asio::ip::address& addr)
|
|
{
|
|
auto mtu = // TODO: implement better
|
|
#ifdef _WIN32
|
|
GetMTUWindows(addr, 0);
|
|
#else
|
|
GetMTUUnix(addr, 0);
|
|
#endif
|
|
return mtu > 0;
|
|
}
|
|
|
|
bool IsInReservedRange (const boost::asio::ip::address& host)
|
|
{
|
|
// https://en.wikipedia.org/wiki/Reserved_IP_addresses
|
|
if (host.is_unspecified ()) return false;
|
|
if(host.is_v4())
|
|
{
|
|
static const std::vector< std::pair<uint32_t, uint32_t> > reservedIPv4Ranges {
|
|
address_pair_v4("0.0.0.0", "0.255.255.255"),
|
|
address_pair_v4("10.0.0.0", "10.255.255.255"),
|
|
address_pair_v4("100.64.0.0", "100.127.255.255"),
|
|
address_pair_v4("127.0.0.0", "127.255.255.255"),
|
|
address_pair_v4("169.254.0.0", "169.254.255.255"),
|
|
address_pair_v4("172.16.0.0", "172.31.255.255"),
|
|
address_pair_v4("192.0.0.0", "192.0.0.255"),
|
|
address_pair_v4("192.0.2.0", "192.0.2.255"),
|
|
address_pair_v4("192.88.99.0", "192.88.99.255"),
|
|
address_pair_v4("192.168.0.0", "192.168.255.255"),
|
|
address_pair_v4("198.18.0.0", "192.19.255.255"),
|
|
address_pair_v4("198.51.100.0", "198.51.100.255"),
|
|
address_pair_v4("203.0.113.0", "203.0.113.255"),
|
|
address_pair_v4("224.0.0.0", "255.255.255.255")
|
|
};
|
|
|
|
uint32_t ipv4_address = host.to_v4 ().to_ulong ();
|
|
for(const auto& it : reservedIPv4Ranges) {
|
|
if (ipv4_address >= it.first && ipv4_address <= it.second)
|
|
return true;
|
|
}
|
|
}
|
|
if(host.is_v6())
|
|
{
|
|
static const std::vector< std::pair<boost::asio::ip::address_v6::bytes_type, boost::asio::ip::address_v6::bytes_type> > reservedIPv6Ranges {
|
|
address_pair_v6("2001:db8::", "2001:db8:ffff:ffff:ffff:ffff:ffff:ffff"),
|
|
address_pair_v6("fc00::", "fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"),
|
|
address_pair_v6("fe80::", "febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff"),
|
|
address_pair_v6("ff00::", "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"),
|
|
address_pair_v6("::", "::"),
|
|
address_pair_v6("::1", "::1")
|
|
};
|
|
|
|
boost::asio::ip::address_v6::bytes_type ipv6_address = host.to_v6 ().to_bytes ();
|
|
for(const auto& it : reservedIPv6Ranges) {
|
|
if (ipv6_address >= it.first && ipv6_address <= it.second)
|
|
return true;
|
|
}
|
|
if (IsYggdrasilAddress (ipv6_address.data ())) // yggdrasil?
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
} // net
|
|
} // util
|
|
} // i2p
|