/*==============================================================
 *                  DD SYSTEM
 *                 DD_Server.c

 *                   V. 7.0

 *
 * Description:
 *
 * See ../DOC/TECHDOC/DDServFunct.html for complete information
 *
 * List of revisions:
 *     September, 1995     - Fedorov, First realisation:  V 1.0
 *     Oct 1997            - Fedorov, Acces security    V 3.0
 *     Sep 4, 2002         - Fedorov, Some changes   V 3.5
 *     Oct 28, 2002        - Fedorov, Communication ideology is changed V 4.1
 *     May 1, 2003         - Fedorov, The buffered send is added V.4.2
 *     Jul 16, 2004        - Fedorov, Check the buffer state V.4.3
 *     March 15, 2007      - Fedorov, V.5.0 Bug in cach, Fedorov
 *     March 24, 2007      - Fedorov, V.5.2 Bug in free memory
 *     Jun 17, 2007        - Fedorov, V.5.5 Create new VI and Fill data via external calls
 *     Jun 20, 2007        - Fedorov, V.5.51 Adjust to createVI**.php
 *     Sep 23, 2007        - Fedorov, V.5.6 SetTime has another interface
 *     Sep 24, 2007        - Fedorov, V.5.6 New Get_Data processing
 *     May 21, 2008        - Fedorov, V.5.7 Try SetTime several times
 *     Apr 12, 2009        - Fedorov, V.5.8 Correct procession of OUTOFTIME
 *     Nov 18, 2012        - Fedorov, V.6.0 New call to get the variable info

 *     Dec 05; 2017        - Renard,  V.7.0

 *===============================================================*/
#include "DD_Access.h"
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include "DD.h"
#include "DD_comm.h"

#include <netinet/tcp.h>

/*-------------- Global definitions ------------------------*/
extern int errno;
int Verbose;                 /* Verbose mode (variable for all subroutines)*/
static int err;              /* Common error for this file */
static fd_set rfds;          // For function select to look
static struct timeval tv;    // if send can be done


/*--------------------- SET_LISTENER ------------------------*/
/* function returns socket ID  of listener or -1 as ERROR   */

int SetListener()
{
/*-------- Variables for resource file -----------------*/
   char rname[PATHLENGTH];      /* name of res file */
   char line[PATHLENGTH];
   char *path;
   FILE *resfile;       /* resource file */

/*---------- Variables for network ---------------------*/
   static struct hostent *Host;        /* name & internet (32b) address for
                                          remote hosts (see netdb.h) */
   static char RemSerName[PATHLENGTH]; /* name of remote server */

   static struct sockaddr_in IntAFAddr; /* structure of internet address of type AF_INET
                                       see <netinet/in.h>
                                       to get name of socket we should
                                       to convert pointer to this structure
                                       to pointer to "srtruct sockaddr" where
                                       all fields are  "char array". */

   int SocketID;               /* socket ID (use as well file ID) */

   int cc,i,j;
   int arg = 0;

   int flags = 1;

/*
 *---------- Getting socket and its address ---------------------
*/
/*---------------- HOST and PORT ------------------------------*/
   if((path = getenv("DDPATH")) == NULL)
   {
      (void *)strcpy(rname,"DD.res");
   }
   else
   {
      (void *)strcpy(rname,path);
      (void *)strcpy(rname + strlen(rname), "/DD.res");
   }

   if((resfile = fopen(rname,"r")) == NULL)
   {

      fprintf(stderr,"No resource file %s\n", rname);

      exit(1);
   }

   fgets(RemSerName, PATHLENGTH, resfile);
   RemSerName[strlen(RemSerName)-1] = '\0';
   fgets(line, PATHLENGTH, resfile);
   sscanf(line,"%hu",&(IntAFAddr.sin_port));
   IntAFAddr.sin_port = htons(IntAFAddr.sin_port); /* Conversion of the port number to
                                                      universal network form */
   fclose(resfile);
/*---------------- END of FILE READING --------------------------*/

/*
 *------- Trying to open socket with this address and name ---------
 */
   if((Host = gethostbyname(RemSerName)) == NULL)  /* Get address and other information by
                                                     host name, see netdb.h  */
   {
      fprintf(stderr,"Server %s not found\n",RemSerName);
      return(-1);
   }

   if((SocketID = socket(PF_INET,SOCK_STREAM,PROTOCOL)) < 0)
   {
      perror("Socket:"); return(-1);
   }

   if (setsockopt(SocketID, SOL_TCP, TCP_NODELAY, (void *)&flags, sizeof(flags))) { 
       perror("setsocketopt(), TCP_NODELAY"); return(-1);
   }

/*
 * Filling full internet address for socket "name"
 * this address will be used to bind  point
 */
   IntAFAddr.sin_family = AF_INET;
   memcpy(&IntAFAddr.sin_addr.s_addr,Host->h_addr_list[0],Host->h_length);
/*
   IntAFAddr.sin_family = Host->h_addrtype;
   IntAFAddr.sin_addr.s_addr = INADDR_ANY;
*/
/* Naming of socket */
   if(bind(SocketID,(struct sockaddr *)&IntAFAddr,sizeof(IntAFAddr))<0)
   {
      perror("Bind:"); return(-1);
   }

   /* Registration of socket as passive for external requests */
   if(listen(SocketID,SOMAXCONN) < 0)
   {
      perror("Listen:"); return(-1);
   }
   fprintf(stderr, "DD_SERVER was connected...!\n");

   /* Watch sochet before each send. */
   FD_ZERO(&rfds);
   FD_SET(SocketID, &rfds);



   return(SocketID);
}
/*---------------- End of SET_LISTENER ---------------------*/

/*----------------- SendToNet ------------------------------*/
/*
 *  Enhanced send function.
 *  It buffers the packed end trying to send it by several attampts
 */
int SendToNet(int SocketID, char *buff, int length)
{
   int cc, pointer;
   int retval;

   pointer = 0;
   while(pointer < length)
   {
      /* Wait up to 30 seconds. */
//      tv.tv_sec = 30;
//      tv.tv_usec = 0;

//      retval = select(SocketID+1,NULL, &rfds, NULL, &tv);
//      if(retval < 0) return -1;
      if((cc = send(SocketID,buff+pointer,length - pointer,0)) < 0)
      {
        if(Verbose) perror("Send Data:");
        return -1;
      }
/*
      fprintf(stderr,"send: p = %d, l = %d, cc = %d\n",pointer, length,cc);
      fprintf(stderr,"buff: %2x %2x %2x %2x %2x %2x %2x %2x %2x %2x %2x %2x\n",
                            buff[0],buff[1],buff[2],buff[3],buff[4],buff[5],buff[6],
                            buff[7],buff[8],buff[9],buff[10],buff[11]);
*/
      pointer += cc;
   }
   return 0;
}

/*------------------ PUTHEADER -----------------------------*

 *

 * Encode end send Reply Header
 */
int PutHeader(int a1, int a2, int a3,int SocketID)
{
   int cc;
   XDR xdrs;
   char buf[REPLYLENGTH];

   xdrmem_create(&xdrs, buf, REPLYLENGTH, XDR_ENCODE);
   xdr_int(&xdrs,&a1);
   xdr_int(&xdrs,&a2);
   xdr_int(&xdrs,&a3);

   xdr_destroy(&xdrs);

/*  if((cc = send(SocketID,buf,REPLYLENGTH,0)) < 0) */
  if((cc =  SendToNet(SocketID,buf, REPLYLENGTH)) < 0)
  {
       if(Verbose) perror("PutHeader:");
       return(REPLYRECERR);
  }
   return(0);
}
/*------------------------end of PutHeader ------------------------*/

/*===================== Send Constant Packet ====================)*/
int SendConstantPacket(DD_Var_t *Data,int SocketID)
{
   caddr_t buff;
   XDR xdrs;
   int PacketSize,i,cc;
   u_int MaxNumber,Number;
   int error = OK;

   MaxNumber = 1;
   for(i = 0;i < Data->AttrData.DimNumber; i++)
      MaxNumber = MaxNumber * Data->AttrData.Dimensions[i];
   PacketSize = xdrlen[DD_INT] +                            /* Number of elements in Dimensions array */
                xdrlen[DD_INT] * Data->AttrData.DimNumber + /* Dimensions array */
                xdrlen[DD_INT] +                            /* Number of elements in data array */
                MaxNumber * xdrlen[Data->AttrData.type];    /* Data Array */

/* Sending Header */
   if((error = PutHeader(Data->AttrData.type,
                         Data->AttrData.DimNumber,
                         PacketSize,SocketID)) < 0) return error;

   buff =(caddr_t)malloc(PacketSize);
   xdrmem_create(&xdrs, buff, (u_int)PacketSize, XDR_ENCODE);

/* Packing Dimensions */
   if(Data->AttrData.DimNumber > 0)
   {
      Number = (u_int)Data->AttrData.DimNumber;
      xdr_array(&xdrs, (caddr_t *)&(Data->AttrData.Dimensions),
      &Number,
      (u_int)Data->AttrData.DimNumber,
      unixlen[DD_INT],
      (xdrproc_t)xdr_int);
   }

/* Packing Variables */
   xdr_array(&xdrs,(caddr_t *)&(Data->AttrData.Variables[0]),
                      &MaxNumber,
                      MaxNumber,
                      unixlen[Data->AttrData.type],
                      (xdrproc_t)ConvFunc[Data->AttrData.type]);

/* Sending Packet */
/*   if((cc = send(SocketID,buff,PacketSize,0)) < 0)*/
   if((cc =  SendToNet(SocketID,buff, PacketSize)) < 0)
   {
      if(Verbose) perror("Send Constant Packet: ");
      error = REPLYRECERR;
   }
   xdr_destroy(&xdrs);
   free(buff);
   return error;
}
/*------------------- End Send Constant Packet -------------------------------*/

/*===================== Send Data Packet ====================)*/
int SendDataPacket(DD_Var_t *Data, int SocketID, int LastFlag)
{
   caddr_t buff;
   XDR xdrs;
   int PacketSize,i,cc,il;
   u_int MaxNumber,Number;
   int error = OK;

   for(il = 0; il < Data->ParamSize; il++)
   {
      MaxNumber = 1;
      for(i = 0;i < Data->VarData[il].DimNumber; i++)
	 MaxNumber = MaxNumber * Data->VarData[il].Dimensions[i];

      PacketSize = xdrlen[DD_INT] +                                                   /* Flag */
		  xdrlen[DD_INT] +                                                    /* arrays  number */
		  xdrlen[DD_INT] +                                                    /* Sise of dimensions array */
		  xdrlen[DD_INT] *(Data->VarData[il].DimNumber+1) +                   /* dimensions array */
		  MaxNumber*xdrlen[Data->VarData[il].type]*Data->VarData[il].VarNumber + /* set if data arrays */
		  xdrlen[DD_INT] * Data->VarData[il].VarNumber;                      /* data arrays sizes */

      /* Sending header */
      if((error = PutHeader(Data->VarData[il].type,
			   Data->VarData[il].DimNumber+1,
			   PacketSize,SocketID)) < 0) return error;

      buff =(caddr_t)malloc(PacketSize);
      xdrmem_create(&xdrs, buff, (u_int)PacketSize, XDR_ENCODE);

      /* Packing flag and Variables number */
      xdr_int(&xdrs, &LastFlag);
      xdr_int(&xdrs, &Data->VarData[il].VarNumber);

      /* Packing dimensions */
      if(Data->VarData[il].DimNumber > 0)
      {
	 Number = (u_int)Data->VarData[il].DimNumber;
	 xdr_array(&xdrs,
	 (caddr_t*)(&Data->VarData[il].Dimensions),
	 &Number,
	 (u_int )Data->VarData[il].DimNumber,
	 unixlen[DD_INT],
	 (xdrproc_t)xdr_int);
      }

      /*Packing Variables */
      for(i = 0; i < Data->VarData[il].VarNumber; i++)
      {
	 Number = MaxNumber;
	 xdr_array(&xdrs,
		  (caddr_t *)(&Data->VarData[il].Variables[i]),
		  &Number,
		  MaxNumber,
		  unixlen[Data->VarData[il].type],
		  (xdrproc_t)ConvFunc[Data->VarData[il].type]);
      }

      /* Sending Data Packet */
      if((cc =  SendToNet(SocketID,buff, PacketSize)) < 0)
      {
	 if(Verbose) perror("SendDataPacket(): ");
	 error = REPLYRECERR;
      }
      xdr_destroy(&xdrs);
      free(buff);
      if(Verbose) fprintf(stderr,"SendDataPacket()[%d] succesful\n",il);
   } // FOR il
   return error;
}
/*----------------------- End Send Data Packet -------------*/

/*--------------------- SERV -------------------------------*/
/*
 * Read requests from socket, call appropriate function and
 * return packets with information
 * Start of this subroutine is the start of new communication session
 */

void Serv(int SocketID)
{
   int cc;
   int i,nlen;
   char *bbt,  GetTime[20];int bbtt[100],j, NoAccessToWork = 0,DD_id;
   char Acc_Int[20]; double TimeInt,TimeStart,TimeStop;
   int ReqType;
   static char *ReqName = NULL;
   static char *ReqTime = NULL;
   static char *ReqHost = NULL;
   static char *ReqTicket = NULL;
   static char *ReqLogin = NULL;
   static char *STReqLogin = NULL;

   /*------- Variables to create new VI ---------------*/
   static char *NewVIName = NULL;    /* Full name of VI (data set to generate )*/
   static char *RemSetID =  NULL;    /* ID of remote Data Set */
   static char *RemBaseName = NULL;  /* Base Name of remote WEB service */

   static char Command[MAXCOMMANDL];  /*Memory for command in system() */

   /*--------------------------------------------------*/

   /*---------------------------------------------------
    * Variables need for the multy variavles
    * Data Get
    *---------------------------------------------------*/
   int PacketSize;                 // The size of the packet to get after the header packet
   static int VarSize=0;           // The number of variables to get
   static char **VarNames = NULL;  // Pointer to the C strings with the variable names
   char *VarBuffer = NULL;
   int BackFlag;                   // Variable for multi variable call
   int il;
   /*---------------------------------------------------*/

   char *STReqHost = NULL;
   int STid;
   char *ReqBuf= NULL;
   XDR xdrs;
   int id=-1,lenall;
   int op;
   int errTick,serr;
   DD_Var_t *Data;
   int RemainID =0;    /* Number of remained ID in use */
   static int TicketID = NOPERMISSION;
   static int uid, FileAccID;
   int GoOut = 0; /* The flag of finishing of session */
   int LastFlag;  /* The flag of the end of data transmission */

/* WORKING */
   if(ReqName == NULL) ReqName = malloc(MAXSETLENGTH);
   if(ReqTime == NULL) ReqTime = malloc(TIMELENGTH);
   if(ReqBuf == NULL) ReqBuf = malloc(REQUESTLENGTH);
   if(ReqHost == NULL) ReqHost = malloc(MAXHOSTLENGTH);
   if(ReqTicket == NULL) ReqTicket = malloc(TICKETLENGTH);
   if(ReqLogin == NULL) ReqLogin = malloc(USRLENGTH);
   if(STReqLogin == NULL) STReqLogin = malloc(USRLENGTH);
   if(STReqHost == NULL) STReqHost = malloc(MAXHOSTLENGTH);
 /*==============================================*/

/*------------------------- General Data Array Preparation ---------------------------*/

  DD_Var  =  (DD_Var_t **)malloc(MaxIDNumber * sizeof(DD_Var_t *));
  for(i=0;i<MaxIDNumber;i++) DD_Var[i] = NULL;

/*-----------------------Open Access Virtual instrument ----------------------------------*/
/**
     sleep(60);
**/
     FileAccID = OpenInstr(ACCINSTR);
     if(FileAccID < 0)
     {
       err = FileAccID;
       fprintf(stderr,"Error while open %s VI\n",ACCINSTR);
       goto endend;
     }

/*------------------------- Read Requests ---------------------------------------*/
 do
   {
      /* Get request from client */
      while((cc = recv(SocketID,ReqBuf,REQUESTLENGTH,0)) < 0);

      if (cc == 0)
      {
    	  err = REQSENDERR;
    	  GoOut = 1;
    	  break;
      }

      err = 0;

/* Decode Request */
      xdrmem_create(&xdrs, ReqBuf, REQUESTLENGTH, XDR_DECODE);
      xdr_int(&xdrs,&ReqType);

      switch (ReqType)
      {
          case OPENINSREQ:
               xdr_string(&xdrs,&ReqName,MAXSETLENGTH);

               xdrmem_create(&xdrs, ReqBuf,REQUESTLENGTH , XDR_FREE);
               while((cc = recv(SocketID,ReqBuf,REQUESTLENGTH,0)) < 0); /* Receive identification packet */

               if (cc == 0)
               {
            	   err = REQSENDERR;
   	   	    	   break;
               }

               xdrmem_create(&xdrs, ReqBuf,REQUESTLENGTH, XDR_DECODE);
               xdr_int(&xdrs,&uid);
               xdr_string(&xdrs,&ReqHost,MAXHOSTLENGTH);
               xdr_string(&xdrs,&ReqLogin,USRLENGTH);
               if(Verbose)printf("Serv():OPENINSREQ: Client Pasport: ID = %d, Host <%s>\n",uid,ReqHost);

               break;

          case CLOSEINSREQ :
               xdr_int(&xdrs,&id);
               break;

          case TIMESETREQ:
               xdr_int(&xdrs,&id);
               xdr_string(&xdrs,&ReqTime,TIMELENGTH);
               break;

          case DATAINFOREQ:
               xdr_int(&xdrs,&id);
               xdr_string(&xdrs,&ReqName,MAXVARLENGTH);
               break;

          /*--------------------------------------------
	   * This request needs to receive the
	   * additinal information from the client
	   *------------------------------------------*/
          case DATAGETREQ:
	       /** sleep(60); **/
	       /*----------------------------------------
	        * Clear the list of variables
		*---------------------------------------*/
	       if(VarNames != NULL)
	       {
		  for(il=0;il < VarSize; il++) free(VarNames[il]);
		  free(VarNames);
		  VarNames = NULL;
		  VarSize = 0;
	       }
	       /*-----------------------------------------
	        * Decode the heading packet
		*---------------------------------------*/
               xdr_int(&xdrs,&id);
               xdr_string(&xdrs,&ReqTime,TIMELENGTH);
	       xdr_int(&xdrs,&PacketSize);
	       xdr_destroy(&xdrs);
	       /*-----------------------------------------
	        * Receive and Decode the variable packet
		*---------------------------------------*/
	       if(VarBuffer != NULL) free(VarBuffer);
	       VarBuffer = (char *)malloc(sizeof(char)*PacketSize);
	       while((cc = recv(SocketID,VarBuffer,PacketSize,0)) < 0);

	       if (cc == 0)
	       {
	    	   err = REQSENDERR;
	    	   break;
	       }

	       xdrmem_create(&xdrs, VarBuffer,PacketSize, XDR_DECODE);
	       xdr_int(&xdrs,&VarSize);
	       VarNames = (char **)malloc(sizeof(char *) * VarSize);
	       for(il=0;il < VarSize; il++)
	       {
	          VarNames[il] = (char *)malloc(sizeof(char) * MAXVARLENGTH);
		  xdr_string(&xdrs,&(VarNames[il]),MAXVARLENGTH);
		  if(Verbose) fprintf(stderr,"Serv():DATAGETREQ: Variable[%d] %s\n",il,VarNames[il]);
	       }
	       xdr_int(&xdrs,&BackFlag);
               break;

         case ADDVIREQ:
              xdr_string(&xdrs,&NewVIName,MAXSETLENGTH);
              xdr_string(&xdrs,&RemSetID,MAXVARLENGTH);
              xdr_string(&xdrs,&RemBaseName,MAXVARLENGTH);
              break;

          case GETTICKETREQ:
               xdrmem_create(&xdrs, ReqBuf,REQUESTLENGTH , XDR_FREE);
               while((cc = recv(SocketID,ReqBuf,REQUESTLENGTH,0)) < 0);

               if (cc == 0)
               {
            	   err = REQSENDERR;
            	   break;
               }

               xdrmem_create(&xdrs, ReqBuf, REQUESTLENGTH, XDR_DECODE);

               xdr_int(&xdrs,&uid);
               xdr_string(&xdrs,&ReqLogin,USRLENGTH);
               xdr_string(&xdrs,&ReqTicket,TICKETLENGTH);
               xdr_string(&xdrs,&ReqHost,MAXHOSTLENGTH);

               break;


          case SHOWTICKETREQ:
               xdr_int(&xdrs,&STid);
               xdr_string(&xdrs,&STReqHost,MAXHOSTLENGTH);
               xdr_string(&xdrs,&STReqLogin,USRLENGTH);
               break;
          default: err = REQSENDERR;
       }                               /* switch REQTYPE */
       xdr_destroy(&xdrs);

      /*------------------------------------------------
       * Call data functions and response generation
       *----------------------------------------------*/

         switch(ReqType)
         {
            case OPENINSREQ:
                 if(Verbose) fprintf(stderr,"Serv():OPENINSREQ:ShowTicket; Host %s\n",ReqHost);
                 err = ShowTicket(uid,ReqHost,ReqLogin);
                 if(err >= 0)
                 {
                   id = OpenInstr(ReqName);
                   err = id;
                   if(id >= 0) strcpy(DD_Var[id]->InstrName,ReqName);
                   err = PutHeader(id,0,0,SocketID); /* return error if something is wrong */
                 }
                 else  PutHeader(err,0,0,SocketID);
                 break;
            case CLOSEINSREQ:
                 if(id < 0){err = NOID;PutHeader(err,0,0,SocketID);}
                 if(Verbose) fprintf(stderr,"Serv():CLOSEINSREQ: ID = %d\n",id);
                 RemainID = CloseID(id);
                 if(RemainID < 1)
                 {
                    err = NOID;
                    PutHeader(err,0,0,SocketID);
                 }
                 else
                 {
                    err = PutHeader(RemainID-1,0,0,SocketID);
                    if(RemainID == 1) GoOut = 1;
                 }
                 break;
            case TIMESETREQ:
                 if(id < 0) err = NOID;
                 if(err >= 0) err = SetTime(DD_Var[id],DD_Time2Double(ReqTime));
                  if(err == CTIMEISSHIFTED) err = SetTime(DD_Var[id],-1.0);
                 if(err >= 0) PutHeader(0,0,0,SocketID);
                 else PutHeader(err,0,0,SocketID);
                 break;

            case DATAINFOREQ:
                 if(id < 0) err = NOID;
                 else err = GetAttribute(id,ReqName);
                 if(err >= 0) err = SendConstantPacket(DD_Var[id],SocketID);
                 else PutHeader(err,0,0,SocketID);
                 break;

            case DATAGETREQ:
                 if(id < 0) err = NOID;
                 /*------ Call data until LastPacket Flag (OK) returns --------*/
                 else do
                 {

                      err = GetMultiData(id,VarSize,VarNames,ReqTime,BackFlag);

                      if(err >= 0)
                      {

                    	  serr = SendDataPacket(DD_Var[id],SocketID,DD_Var[id]->LastPacketFlag); /* OK, MOREDATA, MOREDELAY */
                    	  if(Verbose) fprintf(stderr, "Server:DATAGETRQ (ID=%d):GetMultiData->SentPackets\n", id);

                      }
                 }
                 while((err >= 0) && (DD_Var[id]->LastPacketFlag == MOREDATA));
                 if(err < 0) PutHeader(err,0,0,SocketID);
                 break;

             case ADDVIREQ:
                 sprintf(Command,ADDDATASETCALL,getenv("DDBASEBIN"),RemBaseName,RemSetID,NewVIName);
                 if(Verbose) fprintf(stderr, "Serv:ADDVIREQ: Command = %s\n", Command);
                 err = system(Command);
                 switch(err)
                 {
                   case 0: PutHeader(OK,0,0,SocketID); break;
                   case NOPHP:    PutHeader(NOEXEC,0,0,SocketID); break;
                   case NOSCRIPT: PutHeader(NOEXEC,0,0,SocketID); break;
                   default:       PutHeader(NOEXEC,0,0,SocketID);
                 }
                 GoOut = 1;
                 break;

             case GETTICKETREQ:
                 errTick = CheckTicket(ReqLogin, ReqTicket);
                 Put2Log(uid,ReqHost,ReqLogin,errTick); /* Log file */
                 if(errTick >= 0) TicketID = GetTicket(uid,ReqHost,errTick);
                 if(Verbose) printf("GETTICKETREQ: uid= %d ReqHost = %s ErrTick = %d\n",uid,ReqHost ,errTick);
                 PutHeader(TicketID,0,0,SocketID);
                 GoOut = 1;
                 break;

             case SHOWTICKETREQ:
                 if(Verbose) printf("SHOWTICKETREQ; ShowTicket; Host %s\n",STReqHost);
                 err = ShowTicket(STid,STReqHost,STReqLogin);
                 PutHeader(err,0,0,SocketID);
                 GoOut = 1;
                 break;
        }  /* swithch Reqtype */

   } while(GoOut == 0);/* end while(GoOut) */
   if(Verbose) fprintf(stderr,"DD_SERVER:Exit child process, communication closed\n");


endend:
   if(Verbose)
      fprintf(stderr, "Serv():EndEnd:Close session %d at %s by error %d\n",SocketID,Double2DD_Time((double)time(NULL)),err);
   RemainID = CloseID(FileAccID);
   if(Verbose) fprintf(stderr, "Serv():EndEnd:Last Open VI (Access) is closed\n");

   if(RemainID < 0) err = NOID;

   free(ReqName);
   free(ReqTime);
   free(ReqBuf);
   free(ReqHost);
   free(ReqTicket);
   free(ReqLogin);
   free(STReqLogin);
   free(STReqHost);
   free(DD_Var);

   shutdown(SocketID,2);
   close(SocketID);
   exit(0);
}
/*---------------------end of SERV ------------------------*/

/*-----------------------MAIN ------------------------------*/
int main(int argc, char **argv)
{
   int ListenerID;
   int NewSocketID;
   struct sockaddr NewSocketAddr;
   socklen_t NewSocketLen;
   int stat_loc;

   if(argc < 2) Verbose = 0;
   else if(((argv[1])[1] == 'v') || ((argv[1])[1] == 'V')) Verbose = 1;
   else Verbose = 0;

   Cache_Init();

   if((ListenerID = SetListener()) < 0)
   {
     fprintf(stderr,"DD_server: I cant set Listener Socket\n");
     exit(1);
   }

/*------- Define the maximum number of open Virtual Instruments ----------------*/
   MaxIDNumber =  (size_t)(sysconf(_SC_OPEN_MAX) / 3L - 5L);

/*-------- Endless listen ----------------------------------------------*/
   while(1)
   {
      NewSocketLen = sizeof(NewSocketAddr);
      if((NewSocketID = accept(ListenerID,&NewSocketAddr,&NewSocketLen)) < 0)
      {
         //   printf(" %d %d %d \n", ListenerID, (int)NewSocketLen, NewSocketID);
            if(Verbose) perror("DD_Server: Accept: ");
      }
      else
      {
          if(Verbose) fprintf(stderr, "There is connection from ...\n");
          if(fork() == 0)  /* I am child */
          {
             if(fork() == 0)
             {
                  Serv(NewSocketID); /*Real working */
             }
             else exit(0);
          }
          else wait(&stat_loc);  /* wait of finishing of child */
          close(NewSocketID);
     }
   }
   /* Unreachable point */

   close(ListenerID);

   Cache_Free();

   return 0;
}