mirror of
https://github.com/stargieg/bacnet-stack
synced 2025-10-26 23:35:52 +08:00
94 lines
3.2 KiB
C
94 lines
3.2 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright (C) 2005 Steve Karg <skarg@users.sourceforge.net>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
|
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
|
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
|
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
*********************************************************************/
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include "config.h"
|
|
#include "txbuf.h"
|
|
#include "bacdef.h"
|
|
#include "bacdcode.h"
|
|
#include "whois.h"
|
|
#include "iam.h"
|
|
#include "device.h"
|
|
#include "client.h"
|
|
#include "txbuf.h"
|
|
|
|
bool Send_I_Am_Flag = true;
|
|
|
|
void sendIamUnicast(uint8_t * buffer,
|
|
BACNET_ADDRESS * src)
|
|
{
|
|
BACNET_ADDRESS dest;
|
|
int pdu_len = 0;
|
|
BACNET_NPDU_DATA npdu_data;
|
|
|
|
/* encode the data */
|
|
int npdu_len = 0;
|
|
int apdu_len = 0;
|
|
BACNET_ADDRESS my_address;
|
|
/* The destination will be the same as the src, so copy it over. */
|
|
memcpy(&dest, src, sizeof(BACNET_ADDRESS));
|
|
/* dest->net = 0; - no, must direct back to src->net to meet BTL tests */
|
|
|
|
datalink_get_my_address(&my_address);
|
|
/* encode the NPDU portion of the packet */
|
|
npdu_encode_npdu_data(&npdu_data, false, MESSAGE_PRIORITY_NORMAL);
|
|
npdu_len = npdu_encode_pdu(&buffer[0], &dest, &my_address, &npdu_data);
|
|
/* encode the APDU portion of the packet */
|
|
apdu_len =
|
|
iam_encode_apdu(&buffer[npdu_len], Device_Object_Instance_Number(),
|
|
MAX_APDU, SEGMENTATION_NONE, Device_Vendor_Identifier());
|
|
/* send data */
|
|
pdu_len = npdu_len + apdu_len;
|
|
int bytes = datalink_send_pdu(&dest, &npdu_data, &buffer[0], pdu_len);
|
|
}
|
|
|
|
void handler_who_is(uint8_t * service_request,
|
|
uint16_t service_len,
|
|
BACNET_ADDRESS * src)
|
|
{
|
|
int len = 0;
|
|
int32_t low_limit = 0;
|
|
int32_t high_limit = 0;
|
|
int32_t target_device;
|
|
|
|
len =
|
|
whois_decode_service_request(service_request, service_len, &low_limit,
|
|
&high_limit);
|
|
if (len == 0) {
|
|
sendIamUnicast(&Handler_Transmit_Buffer[0], src);
|
|
} else if (len != -1) {
|
|
/* is my device id within the limits? */
|
|
target_device = Device_Object_Instance_Number();
|
|
if (((target_device >= low_limit) && (target_device <= high_limit)) {
|
|
sendIamUnicast(&Handler_Transmit_Buffer[0], src);
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|