adjust root folder
This commit is contained in:
Steve Karg
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/**************************************************************************
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*
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* Copyright (C) 2008 Steve Karg <skarg@users.sourceforge.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*********************************************************************/
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#include <stddef.h>
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#include <stdint.h>
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#include <errno.h>
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#include <string.h>
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#include "config.h"
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#include "bacdef.h"
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#include "bacdcode.h"
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#include "address.h"
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#include "tsm.h"
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#include "dcc.h"
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#include "npdu.h"
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#include "apdu.h"
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#include "device.h"
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#include "datalink.h"
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#include "iam.h"
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#include "txbuf.h"
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/* some demo stuff needed */
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#include "handlers.h"
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#include "client.h"
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/** @file s_iam.c Send an I-Am message. */
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/** Send a I-Am request to a remote network for a specific device.
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* @param target_address [in] BACnet address of target router
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* @param device_id [in] Device Instance 0 - 4194303
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* @param max_apdu [in] Max APDU 0-65535
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* @param segmentation [in] #BACNET_SEGMENTATION enumeration
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* @param vendor_id [in] BACnet vendor ID 0-65535
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*/
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void Send_I_Am_To_Network(
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BACNET_ADDRESS * target_address,
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uint32_t device_id,
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unsigned int max_apdu,
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int segmentation,
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uint16_t vendor_id)
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{
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int len = 0;
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int pdu_len = 0;
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int bytes_sent = 0;
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BACNET_NPDU_DATA npdu_data;
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BACNET_ADDRESS my_address;
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datalink_get_my_address(&my_address);
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/* encode the NPDU portion of the packet */
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npdu_encode_npdu_data(&npdu_data, false, MESSAGE_PRIORITY_NORMAL);
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pdu_len =
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npdu_encode_pdu(&Handler_Transmit_Buffer[0], target_address,
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&my_address, &npdu_data);
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/* encode the APDU portion of the packet */
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/* encode the APDU portion of the packet */
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len =
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iam_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
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device_id, max_apdu, segmentation, vendor_id);
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pdu_len += len;
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bytes_sent =
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datalink_send_pdu(target_address, &npdu_data,
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&Handler_Transmit_Buffer[0], pdu_len);
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if (bytes_sent <= 0) {
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#if PRINT_ENABLED
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fprintf(stderr, "Failed to Send I-Am Request (%s)!\n",
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strerror(errno));
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#endif
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}
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}
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/** Encode an I Am message to be broadcast.
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* @param buffer [in,out] The buffer to use for building the message.
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* @param dest [out] The destination address information.
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* @param npdu_data [out] The NPDU structure describing the message.
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* @return The length of the message in buffer[].
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*/
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int iam_encode_pdu(
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uint8_t * buffer,
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BACNET_ADDRESS * dest,
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BACNET_NPDU_DATA * npdu_data)
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{
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int len = 0;
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int pdu_len = 0;
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BACNET_ADDRESS my_address;
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datalink_get_my_address(&my_address);
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datalink_get_broadcast_address(dest);
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/* encode the NPDU portion of the packet */
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npdu_encode_npdu_data(npdu_data, false, MESSAGE_PRIORITY_NORMAL);
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pdu_len = npdu_encode_pdu(&buffer[0], dest, &my_address, npdu_data);
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/* encode the APDU portion of the packet */
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len =
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iam_encode_apdu(&buffer[pdu_len], Device_Object_Instance_Number(),
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MAX_APDU, SEGMENTATION_NONE, Device_Vendor_Identifier());
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pdu_len += len;
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return pdu_len;
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}
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/** Broadcast an I Am message.
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* @ingroup DMDDB
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*
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* @param buffer [in] The buffer to use for building and sending the message.
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*/
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void Send_I_Am(
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uint8_t * buffer)
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{
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int pdu_len = 0;
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BACNET_ADDRESS dest;
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int bytes_sent = 0;
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BACNET_NPDU_DATA npdu_data;
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#if 0
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/* note: there is discussion in the BACnet committee
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that we should allow a device to reply with I-Am
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so that dynamic binding always work. If the DCC
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initiator loses the MAC address and routing info,
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they can never re-enable DCC because they can't
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find the device with WhoIs/I-Am */
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/* are we are forbidden to send? */
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if (!dcc_communication_enabled())
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return 0;
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#endif
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/* encode the data */
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pdu_len = iam_encode_pdu(buffer, &dest, &npdu_data);
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/* send data */
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bytes_sent = datalink_send_pdu(&dest, &npdu_data, &buffer[0], pdu_len);
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if (bytes_sent <= 0) {
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#if PRINT_ENABLED
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fprintf(stderr, "Failed to Send I-Am Reply (%s)!\n", strerror(errno));
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#endif
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}
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}
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/** Encode an I Am message to be unicast directly back to the src.
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*
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* @param buffer [in,out] The buffer to use for building the message.
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* @param src [in] The source address information. If the src address is not
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* given, the dest address will be a broadcast address.
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* @param dest [out] The destination address information.
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* @param npdu_data [out] The NPDU structure describing the message.
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* @return The length of the message in buffer[].
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*/
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int iam_unicast_encode_pdu(
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uint8_t * buffer,
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BACNET_ADDRESS * src,
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BACNET_ADDRESS * dest,
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BACNET_NPDU_DATA * npdu_data)
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{
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int npdu_len = 0;
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int apdu_len = 0;
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int pdu_len = 0;
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BACNET_ADDRESS my_address;
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/* The destination will be the same as the src, so copy it over. */
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bacnet_address_copy(dest, src);
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/* dest->net = 0; - no, must direct back to src->net to meet BTL tests */
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datalink_get_my_address(&my_address);
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/* encode the NPDU portion of the packet */
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npdu_encode_npdu_data(npdu_data, false, MESSAGE_PRIORITY_NORMAL);
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npdu_len = npdu_encode_pdu(&buffer[0], dest, &my_address, npdu_data);
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/* encode the APDU portion of the packet */
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apdu_len =
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iam_encode_apdu(&buffer[npdu_len], Device_Object_Instance_Number(),
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MAX_APDU, SEGMENTATION_NONE, Device_Vendor_Identifier());
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pdu_len = npdu_len + apdu_len;
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return pdu_len;
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}
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/** Send an I-Am message by unicasting directly back to the src.
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* @ingroup DMDDB
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* @note As of Addendum 135-2008q-1, unicast responses are allowed;
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* in modern firewalled corporate networks, this may be the
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* only type of response that will reach the source on
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* another subnet (without using the BBMD). <br>
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* However, some BACnet routers may not correctly handle this message.
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*
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* @param buffer [in] The buffer to use for building and sending the message.
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* @param src [in] The source address information from service handler.
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*/
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void Send_I_Am_Unicast(
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uint8_t * buffer,
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BACNET_ADDRESS * src)
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{
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int pdu_len = 0;
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BACNET_ADDRESS dest;
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int bytes_sent = 0;
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BACNET_NPDU_DATA npdu_data;
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#if 0
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/* note: there is discussion in the BACnet committee
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that we should allow a device to reply with I-Am
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so that dynamic binding always work. If the DCC
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initiator loses the MAC address and routing info,
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they can never re-enable DCC because they can't
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find the device with WhoIs/I-Am */
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/* are we are forbidden to send? */
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if (!dcc_communication_enabled())
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return 0;
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#endif
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/* encode the data */
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pdu_len = iam_unicast_encode_pdu(buffer, src, &dest, &npdu_data);
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/* send data */
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bytes_sent = datalink_send_pdu(&dest, &npdu_data, &buffer[0], pdu_len);
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if (bytes_sent <= 0) {
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#if PRINT_ENABLED
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fprintf(stderr, "Failed to Send I-Am Reply (%s)!\n", strerror(errno));
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#endif
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}
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}
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