IceE on Blackfin: DNSException in Ice::initialize

aronnax · July 2009

I am trying to deploy an IceE application on a Blackfin, a DSP/microcontroller made by Analog Devices. I have had little trouble building IceE and building my application for the target platform, but when I run the application on the target platform I get the following error message when I call Ice::initialize:

Network.cpp:770: Ice::DNSException:
DNS error: Servname not supported for ai_socktype

Any ideas?

benoit · July 2009

Hi,

It looks like your platform has limited support for the getaddrinfo system call (see also comment #14 on this thread).

Can you try replacing line 748 in cppe/src/IceE/Network.cpp:

            rs = getaddrinfo(0, "1", &hints, &info); // Get the address of the loopback interface

with:

            rs = getaddrinfo(0, 0, &hints, &info); // Get the address of the loopback interface

Then, re-compile Ice-E and try again to see if the problem is fixed.

Cheers,
Benoit.

aronnax · July 2009

benoit wrote: »

Hi,

Can you try replacing line 748 in cppe/src/IceE/Network.cpp:

            rs = getaddrinfo(0, "1", &hints, &info); // Get the address of the loopback interface

with:

            rs = getaddrinfo(0, 0, &hints, &info); // Get the address of the loopback interface

With the suggested change, I am now getting the following error message:

Network.cpp:770: Ice::DNSException:
DNS error: Name or service not known

benoit · July 2009

Ok, could you try the following options then?

 rs = getaddrinfo(0, "", &hints, &info); // Get the address of the loopback interface

Or

 rs = getaddrinfo(0, "tcpmux", &hints, &info); // Get the address of the loopback interface

Let me know which one works or not.

Cheers,
Benoit.

aronnax · July 2009

I have not yet tried those two suggestions, but I tried something else that seems to work. In Network.cpp, on line 702, there is a snippet of code that looks like this:

#ifdef GUMSTIX                                                                 
    //                                                                           
    // Gumstix does not support calling getaddrinfo with empty host.             
    //                                                                           
    if(host.empty())
    {
        addr.sin_family = AF_INET;
        addr.sin_port = htons(port);
        if(server)
        {
            addr.sin_addr.s_addr = htonl(INADDR_ANY);
        }
        else
        {
            addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
        }
        result.push_back(addr);
        return result;
    }
#endif

I removed the #ifdef and #endif to turn on compilation of this code, and now IceE seems to be working. I am about to test your suggestion.

aronnax · July 2009

benoit wrote: »

 rs = getaddrinfo(0, "tcpmux", &hints, &info); // Get the address of the loopback interface

I tried that already because I had seen that in reference to Red Hat. That didn't work.

aronnax · July 2009

benoit wrote: »
Ok, could you try the following options then?
 rs = getaddrinfo(0, "", &hints, &info); // Get the address of the loopback interface

That one works! Awesome!

benoit · July 2009

Ok, thanks. We'll look into fixing this for the next release!

Cheers,
Benoit.

IceE on Blackfin: DNSException in Ice::initialize

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