1#include <Common/isLocalAddress.h>
2
3#include <cstring>
4#include <Core/Types.h>
5#include <Poco/Util/Application.h>
6#include <Poco/Net/NetworkInterface.h>
7#include <Poco/Net/SocketAddress.h>
8
9
10namespace DB
11{
12
13bool isLocalAddress(const Poco::Net::IPAddress & address)
14{
15 static auto interfaces = Poco::Net::NetworkInterface::list();
16
17 return interfaces.end() != std::find_if(interfaces.begin(), interfaces.end(),
18 [&] (const Poco::Net::NetworkInterface & interface)
19 {
20 /** Compare the addresses without taking into account `scope`.
21 * Theoretically, this may not be correct - depends on `route` setting
22 * - through which interface we will actually access the specified address.
23 */
24 return interface.address().length() == address.length()
25 && 0 == memcmp(interface.address().addr(), address.addr(), address.length());
26 });
27}
28
29bool isLocalAddress(const Poco::Net::SocketAddress & address, UInt16 clickhouse_port)
30{
31 return clickhouse_port == address.port() && isLocalAddress(address.host());
32}
33
34
35size_t getHostNameDifference(const std::string & local_hostname, const std::string & host)
36{
37 size_t hostname_difference = 0;
38 for (size_t i = 0; i < std::min(local_hostname.length(), host.length()); ++i)
39 if (local_hostname[i] != host[i])
40 ++hostname_difference;
41 return hostname_difference;
42}
43
44}
45