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|
/*=============================================================================|
| PROJECT SNAP7 1.4.0 |
|==============================================================================|
| Copyright (C) 2013, 2014 Davide Nardella |
| All rights reserved. |
|==============================================================================|
| SNAP7 is free software: you can redistribute it and/or modify |
| it under the terms of the Lesser GNU General Public License as published by |
| the Free Software Foundation, either version 3 of the License, or |
| (at your option) any later version. |
| |
| It means that you can distribute your commercial software linked with |
| SNAP7 without the requirement to distribute the source code of your |
| application and without the requirement that your application be itself |
| distributed under LGPL. |
| |
| SNAP7 is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| Lesser GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License and a |
| copy of Lesser GNU General Public License along with Snap7. |
| If not, see http://www.gnu.org/licenses/ |
|==============================================================================|
| |
| Resourceless Server example (1.4.0) |
| The Server ha not shared resources. On every Read/Write request a callback |
| is invoked. |
| To the callback are passed the Tag (Area, Start...) and a pointer to a data |
| that you can read/write. |
| |
|=============================================================================*/
#include <stdio.h>
#include <stdlib.h>
#include "snap7.h"
#ifdef OS_WINDOWS
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
#endif
TS7Server *Server;
typedef byte TRWBuffer[1024];
typedef byte *PRWBuffer;
byte cnt = 0;
//------------------------------------------------------------------------------
// hexdump, a very nice function, it's not mine.
// I found it on the net somewhere some time ago... thanks to the author ;-)
//------------------------------------------------------------------------------
#ifndef HEXDUMP_COLS
#define HEXDUMP_COLS 16
#endif
void hexdump(void *mem, unsigned int len)
{
unsigned int i, j;
for (i = 0; i < len + ((len % HEXDUMP_COLS) ? (HEXDUMP_COLS - len % HEXDUMP_COLS) : 0); i++)
{
/* print offset */
if (i % HEXDUMP_COLS == 0)
{
printf("0x%04x: ", i);
}
/* print hex data */
if (i < len)
{
printf("%02x ", 0xFF & ((char*)mem)[i]);
}
else /* end of block, just aligning for ASCII dump */
{
printf(" ");
}
/* print ASCII dump */
if (i % HEXDUMP_COLS == (HEXDUMP_COLS - 1))
{
for (j = i - (HEXDUMP_COLS - 1); j <= i; j++)
{
if (j >= len) /* end of block, not really printing */
{
putchar(' ');
}
else if (isprint((((char*)mem)[j] & 0x7F))) /* printable char */
{
putchar(0xFF & ((char*)mem)[j]);
}
else /* other char */
{
putchar('.');
}
}
putchar('\n');
}
}
}
//------------------------------------------------------------------------------
// Read/Write callback
//------------------------------------------------------------------------------
int S7API RWAreaCallBack(void *usrPtr, int Sender, int Operation, PS7Tag PTag, void *pUsrData)
{
PRWBuffer PBuffer = PRWBuffer(pUsrData);
if (Operation == OperationRead)
printf("Read Request\n");
else
printf("Write Request\n");
switch (PTag->Area)
{
case S7AreaPE: printf("Area : PE, ");
break;
case S7AreaPA: printf("Area : PA, ");
break;
case S7AreaMK: printf("Area : MK, ");
break;
case S7AreaCT: printf("Area : CT, ");
break;
case S7AreaTM: printf("Area : TM, ");
break;
case S7AreaDB: printf("Area : DB%d, ", PTag->DBNumber);
break;
default: printf("Unknown area %d, ", PTag->Area);
}
printf("Start : %d, ", PTag->Start);
printf("Size : %d\n", PTag->Size);
if (Operation == OperationWrite)
hexdump(pUsrData, PTag->Size);
else
{
for (int c = 0; c < 1024; c++)
PBuffer[c] = cnt;
cnt++;
}
printf("\n");
return 0;
};
// Here we use the callback to show the log, this is not the best choice since
// the callback is synchronous with the client access, i.e. the server cannot
// handle futher request from that client until the callback is complete.
// The right choice is to use the log queue via the method PickEvent.
void S7API EventCallBack(void *usrPtr, PSrvEvent PEvent, int Size)
{
// print the event
printf("%s\n", SrvEventText(PEvent).c_str());
};
int main(int argc, char* argv[])
{
int Error;
Server = new TS7Server;
// Filter a bit of noise
Server->SetEventsMask(0x3ff);
// Set the Read/Write callback
Server->SetRWAreaCallback(RWAreaCallBack, NULL);
// Set the event callback to show something : it's not strictly needed.
// If you comment next line the server still works fine.
Server->SetEventsCallback(EventCallBack, NULL);
// Start the server onto the default adapter.
// To select an adapter we have to use Server->StartTo("192.168.x.y").
// Start() is the same of StartTo("0.0.0.0");
Error = Server->Start();
if (Error == 0)
{
// Now the server is running ... wait a key to terminate
getchar();
}
else
printf("%s\n", SrvErrorText(Error).c_str());
// If you got a start error:
// Windows - most likely you ar running the server in a pc on wich is
// installed step 7 : open a command prompt and type
// "net stop s7oiehsx" (Win32) or
// "net stop s7oiehsx64" (Win64)
// And after this test :
// "net start s7oiehsx" (Win32) or
// "net start s7oiehsx64" (Win64)
// Unix - you need root rights :-( because the isotcp port (102) is
// low and so it's considered "privileged".
Server->Stop(); // <- not strictly needed, every server is stopped on deletion
// and every client is gracefully disconnected.
delete Server;
}
// Finally, this is a very minimalist (but working) server :
/*
int main(int argc, char* argv[])
{
TS7Server *Server = new TS7Server;
Server->Start();
getchar();
delete Server;
}
*/
|
