[ENet-discuss] little trouble with enet_address_set_host on Windows

[Benoit Germain]

Hello,

I have a little application which contains both a client and a server. The client attempts to connect to the server using an address resolved with enet_address_set_host to which I give with my PC's name as shown by ipconfig /all. Now, it happens that I also have a video capture device plugged on the PC, which for some reason creates a virtual network :

C:\Documents and Settings\bgermain>ipconfig /all

Configuration IP de Windows

        Nom de l'hôte . . . . . . . . . . : ann-bgermain
        Suffixe DNS principal . . . . . . : ubisoft.org
        Type de noud . . . . . . . . . . : Hybride
        Routage IP activé . . . . . . . . : Non
        Proxy WINS activé . . . . . . . . : Non
        Liste de recherche du suffixe DNS : ubisoft.org

Carte Ethernet Connexion au réseau local 2:

        Suffixe DNS propre à la connexion :
        Description . . . . . . . . . . . : Broadcom NetXtreme 57xx Gigabit Controller
        Adresse IP. . . . . . . . . . . . : 10.2.150.9

Carte Ethernet Connexion au réseau local 3:

        Suffixe DNS propre à la connexion :
        Description . . . . . . . . . . . : Connexion TV/vidéo Microsoft
        Adresse physique . . . . . . . . .: 00-00-00-00-00-00
        Autoconfiguration d'adresse IP. . : 0.1.0.4
        Masque de sous-réseau . . . . . . : 255.255.255.255



The problem is that this address comes first in hostEntry, thus causing the client to attempt to connect to the video device (I suppose). I have come up with a very dirty trick to select the address I am interested in, but maybe someone will have a more portable solution ?

int
enet_address_set_host (ENetAddress * address, const char * name)
{
#if !defined(_XBOX)
    struct hostent * hostEntry;

    hostEntry = gethostbyname (name);
    if (hostEntry == NULL ||
        hostEntry -> h_addrtype != AF_INET)
    {
        unsigned long host = inet_addr (name);
        if (host == INADDR_NONE)
            return -1;
        address -> host = host;
        return 0;
    }

    int i = 0;
    for( char *addr = hostEntry -> h_addr_list[i]; addr != NULL; ++ i, addr = hostEntry -> h_addr_list[i])
    {
        union UIP
        {
            struct { enet_uint8 a, b, c, d; };
            enet_uint32 asU32;
        };
        UIP ip;
        ip.asU32 = * (enet_uint32 *) addr;
        if( ip.a != 0)
        {
            address -> host = ip.asU32;
            break;
        }
    }
#else
        address -> host = inet_addr(name);
#endif

    return 0;
}

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.cubik.org/pipermail/enet-discuss/attachments/20100216/271e0cc5/attachment.htm>