#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "saprfc.h"

char version[5] = "0.3";
static void help( void );

RFC_ERROR_INFO_EX  error_info;

main( int argc, char ** argv )
{
   RFC_HANDLE         handle;
   char             * exception_ptr = NULL,
        * ptr,
        * pa,
        * pb,
          pm_buf[257],
          connect_param[1024];

   int                i, j, len,
          params_found   = 0;

   /* -----------------------------------------------
    * Put parameters from command to RfcOpenEx-Param.
    * ---------------------------------------------*/
    memset(connect_param, 0, sizeof(connect_param));
    ptr = connect_param;
    for (i=1; i<argc; i++)
    {
      len = strlen(argv[i]);

      /* Check syntax of connection parameters */
      pa = (char*)memchr(argv[i], '=', len);
      if (pa == NULL)
      {
        help();
        return 1;
      }

      /* Values which include blanks must be set in "..." */
      pb = (char*)memchr(argv[i], ' ', len);
      if (pb == NULL)
        strcpy(pm_buf, argv[i]);
      else
      {
        memset(pm_buf, 0, sizeof(pm_buf));
        pa = pa + 1;
        len = pa - argv[i];
        memcpy(pm_buf, argv[i], len);
        pm_buf[len] = '"';
        strcpy(pm_buf+len+1, pa);
        pm_buf[strlen(pm_buf)] = '"';
      }

      /* Make an upper-case string */
  for (j=0; j<(int) strlen(pm_buf); j++)
    pm_buf[j] = (char) toupper(pm_buf[j]);
      
      /* Copy into connect_param of RfcOpenEx */
      /* printf("Current : %s\n", pm_buf); */
      strcpy(ptr, pm_buf);
      ptr = ptr + strlen(ptr);
      *ptr++ = ' ';

      /* Check for needed args */
      if (memcmp(argv[i], "CLIENT=", 7) == 0)
  params_found++;
      else if (memcmp(argv[i], "USER=", 5) == 0)
  params_found++;
      else if (memcmp(argv[i], "PASSWD=", 7) == 0)
  params_found++;
      else if (memcmp(argv[i], "ASHOST=", 7) == 0)
  params_found++;
      else if (memcmp(argv[i], "SYSNR=", 6) == 0)
  params_found++;

    }
    
    /* Scream if we do not have the right args */
    if (params_found != 5) {
        printf("Waiting 5 args, received %d\n", params_found);
  help();
    }
    
    /* Of course, do a logon check at OPEN time ! */
    /* CHECKME : I wonder if a value of zero is neccesary to disable account locking */
    strcpy(connect_param+strlen(connect_param), "LCHECK=1 ");
    
    /* Add the ABAP_DEBUG=0 flag */
    /* If set to 1, SAPGUI would automaticaly start, and we want to avoid this */
    strcpy(connect_param+strlen(connect_param), "ABAP_DEBUG=0 ");
    
    /* Use the FR language */
    strcpy(connect_param+strlen(connect_param), "LANG=FR ");
    
    /* Don't use SAPGUI */
    /* We really don't want SAPGUI */
    strcpy(connect_param+strlen(connect_param), "USE_SAPGUI=0 ");

    /* For debugging */
    printf("Connextion string : \n%s\n", connect_param); 
   
    /* Open connection */
  handle = RfcOpenEx(connect_param, &error_info);

   
   if (handle == RFC_HANDLE_NULL) {
  if (error_info.group == 103) {
    printf("[!] Logon failure\n");  
  } else if (error_info.group == 102) {
    printf("[!] Network problem\n");
  } else {
    printf("[!] Strange error : %d -- %s\n", error_info.group, error_info.key);
  }
       exit(1);
   } else {
     /* Bingo : a valid combo ! */
  printf("Bingo :\n%s\n", connect_param);
  RfcClose( handle );


   exit(1);
} /* main */

static void help( void )
{
   printf("Version %s\n", version);
   printf("Usage : ./saplogcheck ASHOST=10.0.0.2 SYSNR=00 USER=SAP* PASSWD=PASS CLIENT=100\n");
   exit(1);
}