bool CNetAddr::IsIPv6() const
{
return (!IsIPv4() && !IsTor() && !IsInternal());
}
bool CNetAddr::IsRFC5737() const
{
return IsIPv4() && ((GetByte(3) == 192 && GetByte(2) == 0 && GetByte(1) == 2) ||
(GetByte(3) == 198 && GetByte(2) == 51 && GetByte(1) == 100) ||
(GetByte(3) == 203 && GetByte(2) == 0 && GetByte(1) == 113));
}
// get canonical identifier of an address' group
// no two connections will be attempted to addresses with the same group
std::vector<unsigned char> CNetAddr::GetGroup() const
{
std::vector<unsigned char> vchRet;
int nClass = NET_IPV6;
int nStartByte = 0;
int nBits = 16;
// all local addresses belong to the same group
if (IsLocal())
{
nClass = 255;
nBits = 0;
}
// all internal-usage addresses get their own group
if (IsInternal())
{
nClass = NET_INTERNAL;
nStartByte = sizeof(g_internal_prefix);
nBits = (sizeof(ip) - sizeof(g_internal_prefix)) * 8;
}
// all other unroutable addresses belong to the same group
else if (!IsRoutable())
{
nClass = NET_UNROUTABLE;
nBits = 0;
}
// for IPv4 addresses, '1' + the 16 higher-order bits of the IP
// includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
else if (IsIPv4() || IsRFC6145() || IsRFC6052())
{
nClass = NET_IPV4;
nStartByte = 12;
}
// for 6to4 tunnelled addresses, use the encapsulated IPv4 address
else if (IsRFC3964())
{
nClass = NET_IPV4;
nStartByte = 2;
}
// for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address
else if (IsRFC4380())
{
vchRet.push_back(NET_IPV4);
vchRet.push_back(GetByte(3) ^ 0xFF);
vchRet.push_back(GetByte(2) ^ 0xFF);
return vchRet;
}
else if (IsTor())
{
nClass = NET_TOR;
nStartByte = 6;
nBits = 4;
}
// for he.net, use /36 groups
else if (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
nBits = 36;
// for the rest of the IPv6 network, use /32 groups
else
nBits = 32;
vchRet.push_back(nClass);
while (nBits >= 8)
{
vchRet.push_back(GetByte(15 - nStartByte));
nStartByte++;
nBits -= 8;
}
if (nBits > 0)
vchRet.push_back(GetByte(15 - nStartByte) | ((1 << (8 - nBits)) - 1));
return vchRet;
}
bool CNetAddr::IsRFC6598() const
{
return IsIPv4() && GetByte(3) == 100 && GetByte(2) >= 64 && GetByte(2) <= 127;
}
bool CNetAddr::IsRFC3927() const
{
return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
}
bool CNetAddr::IsRFC2544() const
{
return IsIPv4() && GetByte(3) == 198 && (GetByte(2) == 18 || GetByte(2) == 19);
}
bool CNetAddr::IsMulticast() const
{
return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0)
|| (GetByte(15) == 0xFF);
}
const char* sockAddrBase::ToString(bool includePort /*true*/) const
{
in_port_t port = includePort ? Port() : 0;
if (IsIPv4())
{
if (port == 0)
return Ip4ToString(getIPv4Storage()->sin_addr);
else
return Ip4ToString(getIPv4Storage()->sin_addr, port);
}
else if (IsIPv6())
{
const sockaddr_in6 *storage = getIPv6Storage();
if (storage->sin6_scope_id == 0 && !port)
{
// Just IPv6 address
char *buffer;
size_t bufsize = GetSmallTLSBuffer(&buffer);
if (!bufsize)
return "<memerror>";
if (!inet_ntop(AF_INET6, &storage->sin6_addr, buffer, bufsize))
return "<Invalid Address>";
return buffer;
}
else
{
// composite address
char ifNameBuf[IF_NAMESIZE];
char addrStrBuf[INET6_ADDRSTRLEN];
const char *ifName = NULL;
const char *addrStr = NULL;
if (storage->sin6_scope_id)
{
ifName = if_indextoname(storage->sin6_scope_id, ifNameBuf);
if (!ifName)
ifName = "???";
}
addrStr = inet_ntop(AF_INET6, &storage->sin6_addr, addrStrBuf, sizeof(addrStrBuf));
if (!addrStr)
addrStr = "<Invalid IPv6>";
if (port)
{
if (ifName)
return FormatShortStr("[%s%%%s]:%d", addrStr, ifName, (int)port);
else
return FormatShortStr("[%s]:%d", addrStr, (int)port);
}
else
{
if (ifName)
return FormatShortStr("%s%%%s", addrStr, ifName);
else
{
LogVerify(false); // should never happen
return FormatShortStr("%s", addrStr);
}
}
}
}
else
return "<Invalid Address>";
}