Thread: Can't compile simple WSAEnumProtocols()

Hello,
I cannot get a simple WSAEnumProtocols to compile.
What's wrong?
Thank you.

The program e1.c:

Code:

//gcc e1.c -lws2_32 -o e1.exe
#include <windows.h>
#include <stdio.h>
#include <winsock2.h>


int main(VOID) {
  WSADATA Data;
  int status;
  WSAPROTOCOL_INFO wpi[10];
  ILPDWORD iii;

  /* initialize the Windows Socket DLL */
  status=WSAStartup(MAKEWORD(1, 1), &Data);
  if (status != 0) {
     printf("WSAStartup unsuccessful");
     return(1);
  }
  
  iii = sizeof(WSAPROTOCOL_INFO)*10;
  status = WSAEnumProtocols(NULL, wpi, &iii );

  printf("status: %d\n",status);
  printf("iii: %d\n",iii);

}

The compile error message:

Code:

C:\gcc\Progs\examples>gcc e1.c -lws2_32 -o e1.exe
e1.c: In function `main':
e1.c:11: error: `ILPDWORD' undeclared (first use in this function)
e1.c:11: error: (Each undeclared identifier is reported only once
e1.c:11: error: for each function it appears in.)
e1.c:11: error: parse error before "iii"
e1.c:20: error: `iii' undeclared (first use in this function)

C:\gcc\Progs\examples>

Also, I can't find the definition for "ILPDWORD".

Thanks for any help.

change ILPDWORD to LPDWORD

http://msdn.microsoft.com/library/de...rotocols_2.asp

'Tis an LPDWORD, meaning, a pointer to a DWORD. You would probably declare 'iii' as a DWORD and then pass the address-of 'iii' to the API.

There's more to calling a function than just getting the types to match

Thanks for the help.

I changed ILPDWORD to LPDWORD and still got an error.

Code:

C:\gcc\Progs\examples>gcc e1.c -lws2_32 -o e1.exe
e1.c: In function `main':
e1.c:20: warning: assignment makes pointer from integer without a cast
e1.c:21: warning: passing arg 3 of `WSAEnumProtocolsA' from incompatible pointer type

Can someone please just post a corrected example that works.

Thanks.

Code:

int main(VOID) {
  WSADATA Data;
  int status;
  WSAPROTOCOL_INFO wpi[10];
  DWORD iii;

  /* initialize the Windows Socket DLL */
  status=WSAStartup(MAKEWORD(1, 1), &Data);
  if (status != 0) {
     printf("WSAStartup unsuccessful");
     return(1);
  }
  
  iii = sizeof(WSAPROTOCOL_INFO)*10;
  status = WSAEnumProtocols(NULL, wpi, &iii );

  printf("status: %d\n",status);
  printf("iii: %d\n",iii);

}

Thanks bithub.