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Added additional WhoIs for network device discovery. Thanks, David Campfield!

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This commit is contained in:
skarg
2010-08-17 14:03:52 +00:00
parent 748c77dc93
commit 2f5c95b7a3
2 changed files with 153 additions and 30 deletions
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bacnet-stack/demo/handler/s_whois.c
+135 -30
View File
@@ -39,16 +39,147 @@
#include "datalink.h"
#include "dcc.h"
#include "whois.h"
#include "bacenum.h"
/* some demo stuff needed */
#include "handlers.h"
#include "txbuf.h"
/** @file s_whois.c Send a Who-Is request. */
/** Send a Who-Is request for a specific device, a range, or any device.
/** Send a Who-Is request to a remote network for a specific device, a range,
* or any device.
* If low_limit and high_limit both are -1, then the range is unlimited.
* If low_limit and high_limit have the same non-negative value, then only
* that device will respond.
* Otherwise, low_limit must be less than high_limit.
* @param target_address [in] BACnet address of target router
* @param low_limit [in] Device Instance Low Range, 0 - 4,194,303 or -1
* @param high_limit [in] Device Instance High Range, 0 - 4,194,303 or -1
*/
void Send_WhoIs_To_Network(
BACNET_ADDRESS * target_address,
int32_t low_limit,
int32_t high_limit)
{
int len = 0;
int pdu_len = 0;
int bytes_sent = 0;
BACNET_NPDU_DATA npdu_data;
/* encode the NPDU portion of the packet */
npdu_encode_npdu_data(&npdu_data, false, MESSAGE_PRIORITY_NORMAL);
pdu_len =
npdu_encode_pdu(&Handler_Transmit_Buffer[0],target_address, NULL, &npdu_data);
/* encode the APDU portion of the packet */
len =
whois_encode_apdu(&Handler_Transmit_Buffer[pdu_len], low_limit,
high_limit);
pdu_len += len;
bytes_sent =
datalink_send_pdu(target_address, &npdu_data, &Handler_Transmit_Buffer[0],
pdu_len);
#if PRINT_ENABLED
if (bytes_sent <= 0)
fprintf(stderr, "Failed to Send Who-Is Request (%s)!\n",
strerror(errno));
#endif
}
/** Send a global Who-Is request for a specific device, a range, or any device.
* If low_limit and high_limit both are -1, then the range is unlimited.
* If low_limit and high_limit have the same non-negative value, then only
* that device will respond.
* Otherwise, low_limit must be less than high_limit.
* @param low_limit [in] Device Instance Low Range, 0 - 4,194,303 or -1
* @param high_limit [in] Device Instance High Range, 0 - 4,194,303 or -1
*/
void Send_WhoIs_Global(
int32_t low_limit,
int32_t high_limit)
{
BACNET_ADDRESS dest;
if (!dcc_communication_enabled())
return;
/* Who-Is is a global broadcast */
datalink_get_broadcast_address(&dest);
Send_WhoIs_To_Network(&dest, low_limit, high_limit);
}
/** Send a local Who-Is request for a specific device, a range, or any device.
* @ingroup DMDDB
* If low_limit and high_limit both are -1, then the range is unlimited.
* If low_limit and high_limit have the same non-negative value, then only
* If low_limit and high_limit have the same non-negative value, then only
* that device will respond.
* Otherwise, low_limit must be less than high_limit.
* @param low_limit [in] Device Instance Low Range, 0 - 4,194,303 or -1
* @param high_limit [in] Device Instance High Range, 0 - 4,194,303 or -1
*/
void Send_WhoIs_Local(
int32_t low_limit,
int32_t high_limit)
{
BACNET_ADDRESS dest;
if (!dcc_communication_enabled())
return;
/* Who-Is is a global broadcast */
datalink_get_broadcast_address(&dest);
/* encode the NPDU portion of the packet */
/* I added this to make it a local broadcast */
dest.net = 0;
/* Not sure why this happens but values are backwards so they need to be reversed */
char temp[6];
temp[0] = dest.mac[3];
temp[1] = dest.mac[2];
temp[2] = dest.mac[1];
temp[3] = dest.mac[0];
temp[4] = dest.mac[5];
temp[5] = dest.mac[4];
int loop;
for(loop = 0; loop < 6; loop++)
{
dest.mac[loop] = temp[loop];
}
Send_WhoIs_To_Network(&dest, low_limit, high_limit);
}
/** Send a Who-Is request to a remote network for a specific device, a range,
* or any device.
* If low_limit and high_limit both are -1, then the range is unlimited.
* If low_limit and high_limit have the same non-negative value, then only
* that device will respond.
* Otherwise, low_limit must be less than high_limit.
* @param target_address [in] BACnet address of target router
* @param low_limit [in] Device Instance Low Range, 0 - 4,194,303 or -1
* @param high_limit [in] Device Instance High Range, 0 - 4,194,303 or -1
*/
void Send_WhoIs_Remote(
BACNET_ADDRESS * target_address,
int32_t low_limit,
int32_t high_limit)
{
if (!dcc_communication_enabled())
return;
Send_WhoIs_To_Network(target_address, low_limit, high_limit);
}
/** Send a global Who-Is request for a specific device, a range, or any device.
* This was the original Who-Is broadcast but the code was moved to the more
* descriptive Send_WhoIs_Global when Send_WhoIs_Local and Send_WhoIsRemote was
* added.
* If low_limit and high_limit both are -1, then the range is unlimited.
* If low_limit and high_limit have the same non-negative value, then only
* that device will respond.
* Otherwise, low_limit must be less than high_limit.
* @param low_limit [in] Device Instance Low Range, 0 - 4,194,303 or -1
@@ -58,32 +189,6 @@ void Send_WhoIs(
int32_t low_limit,
int32_t high_limit)
{
int len = 0;
int pdu_len = 0;
BACNET_ADDRESS dest;
int bytes_sent = 0;
BACNET_NPDU_DATA npdu_data;
if (!dcc_communication_enabled())
return;
/* Who-Is is a global broadcast */
datalink_get_broadcast_address(&dest);
/* encode the NPDU portion of the packet */
npdu_encode_npdu_data(&npdu_data, false, MESSAGE_PRIORITY_NORMAL);
pdu_len =
npdu_encode_pdu(&Handler_Transmit_Buffer[0], &dest, NULL, &npdu_data);
/* encode the APDU portion of the packet */
len =
whois_encode_apdu(&Handler_Transmit_Buffer[pdu_len], low_limit,
high_limit);
pdu_len += len;
bytes_sent =
datalink_send_pdu(&dest, &npdu_data, &Handler_Transmit_Buffer[0],
pdu_len);
#if PRINT_ENABLED
if (bytes_sent <= 0)
fprintf(stderr, "Failed to Send Who-Is Request (%s)!\n",
strerror(errno));
#endif
Send_WhoIs_Global(low_limit, high_limit);
}
bacnet-stack/include/client.h
+18
View File
@@ -58,6 +58,24 @@ extern "C" {
int32_t low_limit,
int32_t high_limit);
void Send_WhoIs_Global(
int32_t low_limit,
int32_t high_limit);
void Send_WhoIs_Local(
int32_t low_limit,
int32_t high_limit);
void Send_WhoIs_Remote(
BACNET_ADDRESS * target_address,
int32_t low_limit,
int32_t high_limit);
void Send_WhoIs_To_Network(
BACNET_ADDRESS * target_address,
int32_t low_limit,
int32_t high_limit);
void Send_WhoHas_Object(
int32_t low_limit,
int32_t high_limit,