mirror of
https://github.com/PurpleI2P/i2pd
synced 2024-11-10 00:00:29 +03:00
326 lines
9.0 KiB
C++
326 lines
9.0 KiB
C++
#include <cstdlib>
|
|
#include <string>
|
|
#include <boost/asio.hpp>
|
|
|
|
#include "util.h"
|
|
#include "Log.h"
|
|
|
|
#ifdef WIN32
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <sysinfoapi.h>
|
|
#include <winsock2.h>
|
|
#include <ws2tcpip.h>
|
|
#include <iphlpapi.h>
|
|
#include <shlobj.h>
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma comment(lib, "IPHLPAPI.lib")
|
|
#endif // _MSC_VER
|
|
|
|
#define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x))
|
|
#define FREE(x) HeapFree(GetProcessHeap(), 0, (x))
|
|
|
|
// inet_pton exists in Windows Vista, but XP haven't that function!
|
|
int inet_pton_xp(int af, const char *src, void *dst)
|
|
{ // This function was written by Petar Korponai?. See http://stackoverflow.com/questions/15660203/inet-pton-identifier-not-found
|
|
struct sockaddr_storage ss;
|
|
int size = sizeof (ss);
|
|
char src_copy[INET6_ADDRSTRLEN + 1];
|
|
|
|
ZeroMemory (&ss, sizeof (ss));
|
|
strncpy (src_copy, src, INET6_ADDRSTRLEN + 1);
|
|
src_copy[INET6_ADDRSTRLEN] = 0;
|
|
|
|
if (WSAStringToAddress (src_copy, af, NULL, (struct sockaddr *)&ss, &size) == 0)
|
|
{
|
|
switch (af)
|
|
{
|
|
case AF_INET:
|
|
*(struct in_addr *)dst = ((struct sockaddr_in *)&ss)->sin_addr;
|
|
return 1;
|
|
case AF_INET6:
|
|
*(struct in6_addr *)dst = ((struct sockaddr_in6 *)&ss)->sin6_addr;
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
#else /* !WIN32 => UNIX */
|
|
#include <sys/types.h>
|
|
#include <ifaddrs.h>
|
|
#endif
|
|
|
|
namespace i2p
|
|
{
|
|
namespace util
|
|
{
|
|
namespace net
|
|
{
|
|
#ifdef WIN32
|
|
bool IsWindowsXPorLater() {
|
|
OSVERSIONINFO osvi;
|
|
|
|
ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
|
|
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
|
|
|
|
GetVersionEx(&osvi);
|
|
|
|
if (osvi.dwMajorVersion <= 5)
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
int GetMTUWindowsIpv4(sockaddr_in inputAddress, int fallback)
|
|
{
|
|
ULONG outBufLen = 0;
|
|
PIP_ADAPTER_ADDRESSES pAddresses = nullptr;
|
|
PIP_ADAPTER_ADDRESSES pCurrAddresses = nullptr;
|
|
PIP_ADAPTER_UNICAST_ADDRESS pUnicast = nullptr;
|
|
|
|
|
|
if(GetAdaptersAddresses(AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen)
|
|
== ERROR_BUFFER_OVERFLOW) {
|
|
FREE(pAddresses);
|
|
pAddresses = (IP_ADAPTER_ADDRESSES*) MALLOC(outBufLen);
|
|
}
|
|
|
|
DWORD dwRetVal = GetAdaptersAddresses(
|
|
AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen
|
|
);
|
|
|
|
if(dwRetVal != NO_ERROR) {
|
|
LogPrint(eLogError, "NetIface: GetMTU(): enclosed GetAdaptersAddresses() call has failed");
|
|
FREE(pAddresses);
|
|
return fallback;
|
|
}
|
|
|
|
pCurrAddresses = pAddresses;
|
|
while(pCurrAddresses) {
|
|
PIP_ADAPTER_UNICAST_ADDRESS firstUnicastAddress = pCurrAddresses->FirstUnicastAddress;
|
|
|
|
pUnicast = pCurrAddresses->FirstUnicastAddress;
|
|
if(pUnicast == nullptr) {
|
|
LogPrint(eLogError, "NetIface: GetMTU(): not a unicast ipv4 address, this is not supported");
|
|
}
|
|
for(int i = 0; pUnicast != nullptr; ++i) {
|
|
LPSOCKADDR lpAddr = pUnicast->Address.lpSockaddr;
|
|
sockaddr_in* localInterfaceAddress = (sockaddr_in*) lpAddr;
|
|
if(localInterfaceAddress->sin_addr.S_un.S_addr == inputAddress.sin_addr.S_un.S_addr) {
|
|
auto result = pAddresses->Mtu;
|
|
FREE(pAddresses);
|
|
return result;
|
|
}
|
|
pUnicast = pUnicast->Next;
|
|
}
|
|
pCurrAddresses = pCurrAddresses->Next;
|
|
}
|
|
|
|
LogPrint(eLogError, "NetIface: GetMTU(): no usable unicast ipv4 addresses found");
|
|
FREE(pAddresses);
|
|
return fallback;
|
|
}
|
|
|
|
int GetMTUWindowsIpv6(sockaddr_in6 inputAddress, int fallback)
|
|
{
|
|
ULONG outBufLen = 0;
|
|
PIP_ADAPTER_ADDRESSES pAddresses = nullptr;
|
|
PIP_ADAPTER_ADDRESSES pCurrAddresses = nullptr;
|
|
PIP_ADAPTER_UNICAST_ADDRESS pUnicast = nullptr;
|
|
|
|
if(GetAdaptersAddresses(AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen)
|
|
== ERROR_BUFFER_OVERFLOW) {
|
|
FREE(pAddresses);
|
|
pAddresses = (IP_ADAPTER_ADDRESSES*) MALLOC(outBufLen);
|
|
}
|
|
|
|
DWORD dwRetVal = GetAdaptersAddresses(
|
|
AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen
|
|
);
|
|
|
|
if(dwRetVal != NO_ERROR) {
|
|
LogPrint(eLogError, "NetIface: GetMTU(): enclosed GetAdaptersAddresses() call has failed");
|
|
FREE(pAddresses);
|
|
return fallback;
|
|
}
|
|
|
|
bool found_address = false;
|
|
pCurrAddresses = pAddresses;
|
|
while(pCurrAddresses) {
|
|
PIP_ADAPTER_UNICAST_ADDRESS firstUnicastAddress = pCurrAddresses->FirstUnicastAddress;
|
|
pUnicast = pCurrAddresses->FirstUnicastAddress;
|
|
if(pUnicast == nullptr) {
|
|
LogPrint(eLogError, "NetIface: GetMTU(): not a unicast ipv6 address, this is not supported");
|
|
}
|
|
for(int i = 0; pUnicast != nullptr; ++i) {
|
|
LPSOCKADDR lpAddr = pUnicast->Address.lpSockaddr;
|
|
sockaddr_in6 *localInterfaceAddress = (sockaddr_in6*) lpAddr;
|
|
|
|
for (int j = 0; j != 8; ++j) {
|
|
if (localInterfaceAddress->sin6_addr.u.Word[j] != inputAddress.sin6_addr.u.Word[j]) {
|
|
break;
|
|
} else {
|
|
found_address = true;
|
|
}
|
|
} if (found_address) {
|
|
auto result = pAddresses->Mtu;
|
|
FREE(pAddresses);
|
|
pAddresses = nullptr;
|
|
return result;
|
|
}
|
|
pUnicast = pUnicast->Next;
|
|
}
|
|
|
|
pCurrAddresses = pCurrAddresses->Next;
|
|
}
|
|
|
|
LogPrint(eLogError, "NetIface: GetMTU(): no usable unicast ipv6 addresses found");
|
|
FREE(pAddresses);
|
|
return fallback;
|
|
}
|
|
|
|
int GetMTUWindows(const boost::asio::ip::address& localAddress, int fallback)
|
|
{
|
|
#ifdef UNICODE
|
|
string localAddress_temporary = localAddress.to_string();
|
|
wstring localAddressUniversal(localAddress_temporary.begin(), localAddress_temporary.end());
|
|
#else
|
|
std::string localAddressUniversal = localAddress.to_string();
|
|
#endif
|
|
|
|
if (IsWindowsXPorLater())
|
|
#define inet_pton inet_pton_xp
|
|
|
|
if(localAddress.is_v4()) {
|
|
sockaddr_in inputAddress;
|
|
inet_pton(AF_INET, localAddressUniversal.c_str(), &(inputAddress.sin_addr));
|
|
return GetMTUWindowsIpv4(inputAddress, fallback);
|
|
} else if(localAddress.is_v6()) {
|
|
sockaddr_in6 inputAddress;
|
|
inet_pton(AF_INET6, localAddressUniversal.c_str(), &(inputAddress.sin6_addr));
|
|
return GetMTUWindowsIpv6(inputAddress, fallback);
|
|
} else {
|
|
LogPrint(eLogError, "NetIface: GetMTU(): address family is not supported");
|
|
return fallback;
|
|
}
|
|
|
|
}
|
|
#else // assume unix
|
|
int GetMTUUnix(const boost::asio::ip::address& localAddress, int fallback)
|
|
{
|
|
ifaddrs* ifaddr, *ifa = nullptr;
|
|
if(getifaddrs(&ifaddr) == -1)
|
|
{
|
|
LogPrint(eLogError, "NetIface: Can't call getifaddrs(): ", strerror(errno));
|
|
return fallback;
|
|
}
|
|
|
|
int family = 0;
|
|
// look for interface matching local address
|
|
for(ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next)
|
|
{
|
|
if(!ifa->ifa_addr)
|
|
continue;
|
|
|
|
family = ifa->ifa_addr->sa_family;
|
|
if(family == AF_INET && localAddress.is_v4())
|
|
{
|
|
sockaddr_in* sa = (sockaddr_in*) ifa->ifa_addr;
|
|
if(!memcmp(&sa->sin_addr, localAddress.to_v4().to_bytes().data(), 4))
|
|
break; // address matches
|
|
}
|
|
else if(family == AF_INET6 && localAddress.is_v6())
|
|
{
|
|
sockaddr_in6* sa = (sockaddr_in6*) ifa->ifa_addr;
|
|
if(!memcmp(&sa->sin6_addr, localAddress.to_v6().to_bytes().data(), 16))
|
|
break; // address matches
|
|
}
|
|
}
|
|
int mtu = fallback;
|
|
if(ifa && family)
|
|
{ // interface found?
|
|
int fd = socket(family, SOCK_DGRAM, 0);
|
|
if(fd > 0)
|
|
{
|
|
ifreq ifr;
|
|
strncpy(ifr.ifr_name, ifa->ifa_name, IFNAMSIZ); // set interface for query
|
|
if(ioctl(fd, SIOCGIFMTU, &ifr) >= 0)
|
|
mtu = ifr.ifr_mtu; // MTU
|
|
else
|
|
LogPrint (eLogError, "NetIface: Failed to run ioctl: ", strerror(errno));
|
|
close(fd);
|
|
}
|
|
else
|
|
LogPrint(eLogError, "NetIface: Failed to create datagram socket");
|
|
}
|
|
else
|
|
LogPrint(eLogWarning, "NetIface: interface for local address", localAddress.to_string(), " not found");
|
|
freeifaddrs(ifaddr);
|
|
|
|
return mtu;
|
|
}
|
|
#endif // WIN32
|
|
|
|
int GetMTU(const boost::asio::ip::address& localAddress)
|
|
{
|
|
const int fallback = 576; // fallback MTU
|
|
|
|
#ifdef WIN32
|
|
return GetMTUWindows(localAddress, fallback);
|
|
#else
|
|
return GetMTUUnix(localAddress, fallback);
|
|
#endif
|
|
return fallback;
|
|
}
|
|
|
|
const boost::asio::ip::address GetInterfaceAddress(const std::string & ifname, bool ipv6)
|
|
{
|
|
#ifdef WIN32
|
|
LogPrint(eLogError, "NetIface: cannot get address by interface name, not implemented on WIN32");
|
|
return boost::asio::ip::address::from_string("127.0.0.1");
|
|
#else
|
|
int af = (ipv6 ? AF_INET6 : AF_INET);
|
|
ifaddrs * addrs = nullptr;
|
|
if(getifaddrs(&addrs) == 0)
|
|
{
|
|
// got ifaddrs
|
|
ifaddrs * cur = addrs;
|
|
while(cur)
|
|
{
|
|
std::string cur_ifname(cur->ifa_name);
|
|
if (cur_ifname == ifname && cur->ifa_addr && cur->ifa_addr->sa_family == af)
|
|
{
|
|
// match
|
|
char * addr = new char[INET6_ADDRSTRLEN];
|
|
bzero(addr, INET6_ADDRSTRLEN);
|
|
if(af == AF_INET)
|
|
inet_ntop(af, &((sockaddr_in *)cur->ifa_addr)->sin_addr, addr, INET6_ADDRSTRLEN);
|
|
else
|
|
inet_ntop(af, &((sockaddr_in6 *)cur->ifa_addr)->sin6_addr, addr, INET6_ADDRSTRLEN);
|
|
freeifaddrs(addrs);
|
|
std::string cur_ifaddr(addr);
|
|
delete[] addr;
|
|
return boost::asio::ip::address::from_string(cur_ifaddr);
|
|
}
|
|
cur = cur->ifa_next;
|
|
}
|
|
}
|
|
if(addrs) freeifaddrs(addrs);
|
|
std::string fallback;
|
|
if(ipv6) {
|
|
fallback = "::";
|
|
LogPrint(eLogWarning, "NetIface: cannot find ipv6 address for interface ", ifname);
|
|
} else {
|
|
fallback = "127.0.0.1";
|
|
LogPrint(eLogWarning, "NetIface: cannot find ipv4 address for interface ", ifname);
|
|
}
|
|
return boost::asio::ip::address::from_string(fallback);
|
|
|
|
#endif
|
|
}
|
|
}
|
|
} // util
|
|
} // i2p
|