Find machine IP adress from machine name

Question

I know the remote machine name, this machine is on the same network.

If I ping that machine from command prompt, I get the IP information as well.

C:\Users\anikumar>ping neemqx01g

Pinging neemqx01g.efi.internal [10.210.98.194] with 32 bytes of data:
Reply from 10.210.98.194: bytes=32 time=2ms TTL=128
Reply from 10.210.98.194: bytes=32 time<1ms TTL=128
Reply from 10.210.98.194: bytes=32 time<1ms TTL=128
Reply from 10.210.98.194: bytes=32 time<1ms TTL=128

Ping statistics for 10.210.98.194:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 2ms, Average = 0ms

How can I achieve programmatically in wxWidgets or boost to get the IP address?

Answer:

C function:

const wxString GetIPbyName(const wxString& name)
{
    struct hostent* pHostInfo;
    pHostInfo = gethostbyname(name.c_str());

    in_addr * address = (in_addr *)pHostInfo->h_addr;
    std::string ip_address = inet_ntoa(*address);

    return ip_address;
}

wxWidgets:

   wxIPV4address ipv4;
   ipv4.Hostname(m_currentServer);
   wxString m_currentServer = ipv4.IPAddress();

I am not how above will behave in case of multiple active network cards.

See http://stackoverflow.com/questions/5486113/boost-asio-how-to-turn-url-into-ip-adress — Yam Marcovic, Feb 26 '16 at 12:36
@YamMarcovic: The OP is not asking about URIs, nor about Boost.ASIO. — Lightness Races in Orbit, Feb 26 '16 at 12:48
@PreferenceBean I don't think there is such a component in a purely GUI framework; but the answer in the link covered resolving hostnames with asio which is portable (as you ended up recommending yourself). — Yam Marcovic, Feb 26 '16 at 13:03

Lightness Races in Orbit · Answer 1 · 2016-02-27T00:37:21.150

2

I've looked through the documentation for you and, you can't.

For portable network name lookups you could consider making use of a general-purpose cross-platform networking library, such as Boost.ASIO.

edited Feb 27 '16 at 00:37

answered Feb 26 '16 at 12:49

Lightness Races in Orbit

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could you please post a code snippet. – Anil8753 Feb 26 '16 at 13:34
Huh? "How can I do this?" -> "No, it doesn't." ??? – user253751 Feb 26 '16 at 21:46
@immibis: Yeah, okay ;) – Lightness Races in Orbit Feb 27 '16 at 00:37

score 1 · Answer 2 · answered Feb 26 '16 at 13:05

1

C socket library is (almost) portable. You will have the old gethostbyaddr call or the newer getaddrinfo one.

But you will need some #ifdef to make them truely portable because:

headers are not the same netdb.h (and optionaly sys/types.h and sys/socket.h) on a Posix system and Ws2tcpip.h and winsock2.h on Windows
on windows, you need a call to WSAStartup to initialize winsock.

answered Feb 26 '16 at 13:05

Serge Ballesta

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And this is why we let well-tested, widely-used libraries do that for us. – Lightness Races in Orbit Feb 26 '16 at 13:57

Find machine IP adress from machine name

2 Answers2