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> The CSocket::Create() function consistently failed, and
> CSocket::GetLastError() returned WSAEPROTOTYPE. I tried running the CHATTER
> sample program, and its socket creation failed with the same error.

I've been able to compile and run CHATTER and CHATSRV just fine 
with 4.0 (Local LAN).
-----------------------------------------------------------
Derek W. Taylor
Software Engineer
Edmark Corporation
-----------------------------------------------------------

Gavin Williams <gavin@metronet.com> wrote:

>> I finally got around to doing a little Windows Sockets programming in VC++ 
>> 4.0 today and was quickly greeted with an ugly problem--I can't get it to 
>> create a socket.

>> The CSocket::Create() function consistently failed, and 
>> CSocket::GetLastError() returned WSAEPROTOTYPE. I tried running the CHATTER 
>> sample program, and its socket creation failed with the same error.

Do you have TCP/IP installed on the machine?

Brad

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In Article<30F8A8B9.279B@metronet.com>, <gavin@metronet.com> writes:
> I finally got around to doing a little Windows Sockets programming in VC++ 
> 4.0 today and was quickly greeted with an ugly problem--I can't get it to 
> create a socket.
> 
> The CSocket::Create() function consistently failed, and 
> CSocket::GetLastError() returned WSAEPROTOTYPE. I tried running the CHATTER 
> sample program, and its socket creation failed with the same error.
> 
> Then I tried tried straight socket API calls (as opposed to using the 
CSocket 
> or CAsyncSocket classes). The "socket" function also failed with the 
> WSAEPROTOTYPE error.
> 
> Finally, I tried some simple sockets code in VC++ 1.52c and VC++ 2.2. The 
> code *worked* in both cases. The *exact same code* works fine when compiled 
> with 2.2 but fails when compiled with 4.0.
> 
> Here's a sample of my test code:
> 
>   WSADATA wsadata;
>   WSAStartup( 0x0101, &wsadata );
> 
>   SOCKET sock;
>   if( INVALID_SOCKET == (sock = socket( PF_INET, SOCK_STREAM, 0 )) )
> 	{
> 	int i = WSAGetLastError();
> 	}
> 
>   WSACleanup();

Hmmm... strange!

First of all, test the return value from WSAStartup, make sure it is 
succeeding!

If so then try this socket call:

	sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	...

This shouldn't be substantially different from your call, it is just more 
explicit.  Some points:

   - The first parameter to socket() specifies an address family, not a
     protocol family so the use of the AF_ constants is more appropriate.
     The header file defines the PF_ and AF_ values to be the same, but
     you never know...

   - Specifying a specific protocol (TCP in this case) leaves the socket
     library no leeway to misinterpret the kind of socket you want.

Other than this I do not know what could be wrong.  A WSAEPROTOTYPE error 
indicates (according to the spec) that the SOCK_STREAM parameter is not 
available for a PF_INET (AF_INET) address family socket which clearly does not 
make sense.

I have not tried to use 4.0 to build socket apps yet so cannot tell you that 
it absolutely works.

-- Tom
   twb@netmanage.com

In article <30F8A8B9.279B@metronet.com>
           gavin@metronet.com "Gavin Williams" writes:

>Has anyone else out there encountered this problem?  Is anyone using sockets 
>successfully with VC++ 4.0?

At work we write a large "distributed application" development toolkit
which does all its RPC calls with TCP/IP. The NT version of it ported from
VC++ 2 to VC++ 4 with no problems whatsoever - it all works fine.

Chris
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      Author member of Association of Shareware Professionals (ASP) 
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I have compiled the vc4 versions of chatter and chatsrv, and they work
fine on my machine. I want to make some modifications so that they
would become more useful, but I can't figure it out, and was hoping
you could help me. I have stepped through the code and still can't
find the instructions or statements that I need.
I want to redirect the pipe output on the client machine, and can't
find where or when the packets are received.
And I want to transmit other info into the pipe, and I can't find
where this is being done.
I know these are lame questions, but any help would really be
appreciated.
thank you
jr

ps-can this be modified to work over the internet?I tried using the
server ip as an internet address, and it couldn't find it.

Derek Taylor <derekt@edmark.com> wrote:

>> The CSocket::Create() function consistently failed, and
>> CSocket::GetLastError() returned WSAEPROTOTYPE. I tried running the CHATTER
>> sample program, and its socket creation failed with the same error.
>
>I've been able to compile and run CHATTER and CHATSRV just fine 
>with 4.0 (Local LAN).

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