ClickHouse/dbms/src/Common/isLocalAddress.cpp
Vitaliy Lyudvichenko 704583968f Do not save resolved addresses in Connections. [#CLICKHOSUE-2]
Add disable_internal_dns_cache main config option.
2018-05-09 07:55:08 +03:00

45 lines
1.5 KiB
C++

#include <Common/isLocalAddress.h>
#include <cstring>
#include <Core/Types.h>
#include <Poco/Util/Application.h>
#include <Poco/Net/NetworkInterface.h>
#include <Poco/Net/SocketAddress.h>
namespace DB
{
bool isLocalAddress(const Poco::Net::IPAddress & address)
{
static auto interfaces = Poco::Net::NetworkInterface::list();
return interfaces.end() != std::find_if(interfaces.begin(), interfaces.end(),
[&] (const Poco::Net::NetworkInterface & interface)
{
/** Compare the addresses without taking into account `scope`.
* Theoretically, this may not be correct - depends on `route` setting
* - through which interface we will actually access the specified address.
*/
return interface.address().length() == address.length()
&& 0 == memcmp(interface.address().addr(), address.addr(), address.length());
});
}
bool isLocalAddress(const Poco::Net::SocketAddress & address, UInt16 clickhouse_port)
{
return clickhouse_port == address.port() && isLocalAddress(address.host());
}
size_t getHostNameDifference(const std::string & local_hostname, const std::string & host)
{
size_t hostname_difference = 0;
for (size_t i = 0; i < std::min(local_hostname.length(), host.length()); ++i)
if (local_hostname[i] != host[i])
++hostname_difference;
return hostname_difference;
}
}