bool IsRoutableAddress(const CStdString& address)
{
if (address.Find(_T(":")) != -1)
{
CStdString long_address = GetIPV6LongForm(address);
if (long_address.IsEmpty())
return false;
if (long_address[0] == '0')
{
// ::/128
if (long_address == _T("0000:0000:0000:0000:0000:0000:0000:0000"))
return false;
// ::1/128
if (long_address == _T("0000:0000:0000:0000:0000:0000:0000:0001"))
return false;
if (long_address.Left(30) == _T("0000:0000:0000:0000:0000:ffff:"))
{
// IPv4 mapped
CStdString ipv4;
ipv4.Format(_T("%d.%d.%d.%d"),
DigitHexToDecNum(long_address[30]) * 16 + DigitHexToDecNum(long_address[31]),
DigitHexToDecNum(long_address[32]) * 16 + DigitHexToDecNum(long_address[33]),
DigitHexToDecNum(long_address[35]) * 16 + DigitHexToDecNum(long_address[36]),
DigitHexToDecNum(long_address[37]) * 16 + DigitHexToDecNum(long_address[38]));
return IsRoutableAddress(ipv4);
}
return true;
}
if (long_address[0] == 'f')
{
if (long_address[1] == 'e')
{
// fe80::/10 (link local)
const TCHAR& c = long_address[2];
int v;
if (c >= 'a')
v = c - 'a' + 10;
else
v = c - '0';
if ((v & 0xc) == 0x8)
return false;
return true;
}
else if (long_address[1] == 'c' || long_address[1] == 'd')
{
// fc00::/7 (site local)
return false;
}
}
return true;
}
else
{
// Assumes address is already a valid IP address
if (address.Left(3) == _T("127") ||
address.Left(3) == _T("10.") ||
address.Left(7) == _T("192.168") ||
address.Left(7) == _T("169.254"))
return false;
if (address.Left(3) == _T("172"))
{
CStdString middle = address.Mid(4);
int pos = address.Find(_T("."));
if (pos == -1)
return false;
int part = _ttoi(middle.Left(pos));
if (part >= 16 && part <= 31)
return false;
}
return true;
}
}
bool IsRoutableAddress(const wxString& address, CSocket::address_family family)
{
if (family == CSocket::ipv6)
{
wxString long_address = GetIPV6LongForm(address);
if (long_address.size() != 39)
return false;
if (long_address[0] == '0')
{
// ::/128
if (long_address == _T("0000:0000:0000:0000:0000:0000:0000:0000"))
return false;
// ::1/128
if (long_address == _T("0000:0000:0000:0000:0000:0000:0000:0001"))
return false;
if (long_address.Left(30) == _T("0000:0000:0000:0000:0000:ffff:"))
{
// IPv4 mapped
wxString ipv4 = wxString::Format(_T("%d.%d.%d.%d"),
DigitHexToDecNum(long_address[30]) * 16 + DigitHexToDecNum(long_address[31]),
DigitHexToDecNum(long_address[32]) * 16 + DigitHexToDecNum(long_address[33]),
DigitHexToDecNum(long_address[35]) * 16 + DigitHexToDecNum(long_address[36]),
DigitHexToDecNum(long_address[37]) * 16 + DigitHexToDecNum(long_address[38]));
return IsRoutableAddress(ipv4, CSocket::ipv4);
}
return true;
}
if (long_address[0] == 'f')
{
if (long_address[1] == 'e')
{
// fe80::/10 (link local)
const wxChar& c = long_address[2];
int v;
if (c >= 'a')
v = c - 'a' + 10;
else
v = c - '0';
if ((v & 0xc) == 0x8)
return false;
return true;
}
else if (long_address[1] == 'c' || long_address[1] == 'd')
{
// fc00::/7 (site local)
return false;
}
}
return true;
}
else
{
// Assumes address is already a valid IP address
if (address.Left(3) == _T("127") ||
address.Left(3) == _T("10.") ||
address.Left(7) == _T("192.168") ||
address.Left(7) == _T("169.254"))
return false;
if (address.Left(3) == _T("172"))
{
wxString middle = address.Mid(4);
int pos = address.Find(_T("."));
wxASSERT(pos != -1);
long part;
middle.Left(pos).ToLong(&part);
if (part >= 16 && part <= 31)
return false;
}
return true;
}
}
bool MatchesFilter(CStdString filter, CStdString ip)
{
// A single asterix matches all IPs.
if (filter == _T("*"))
return true;
// Check for IP range syntax.
int pos = filter.Find('/');
if (pos != -1)
{
// CIDR filter
int prefixLength = _ttoi(filter.Mid(pos+1));
if (ip.Find(':') != -1)
{
// IPv6 address
CStdString left = GetIPV6LongForm(filter.Left(pos));
if (left.Find(':') == -1)
return false;
ip = GetIPV6LongForm(ip);
LPCTSTR i = ip;
LPCTSTR f = left;
while (prefixLength >= 4)
{
if (*i != *f)
return false;
if (!*i)
return true;
if (*i == ':')
{
++i;
++f;
}
++i;
++f;
prefixLength -= 4;
}
if (!prefixLength)
return true;
int mask;
if (prefixLength == 1)
mask = 0x8;
else if (prefixLength == 2)
mask = 0xc;
else
mask = 0xe;
return (DigitHexToDecNum(*i) & mask) == (DigitHexToDecNum(*f) & mask);
}
else
{
if (prefixLength < 0)
prefixLength = 0;
else if (prefixLength > 32)
prefixLength = 32;
// IPv4 address
CStdString left = filter.Left(pos);
if (left.Find(':') != -1)
return false;
unsigned long i = ntohl(inet_addr(ConvToLocal(ip)));
unsigned long f = ntohl(inet_addr(ConvToLocal(left)));
i &= prefixMasksV4[prefixLength];
f &= prefixMasksV4[prefixLength];
return i == f;
}
}
else
{
// Literal filter
if (filter.Find(':') != -1)
return filter == GetIPV6ShortForm(ip);
else
return filter == ip;
}
}