From 56ef663061e9bfaf228802abd79b149d3cda6606 Mon Sep 17 00:00:00 2001
From: skarg <skarg@1e814d3a-8a88-4260-be86-c0dc25669c1e>
Date: Fri, 2 Feb 2007 22:47:26 +0000
Subject: [PATCH] Added read property handler for just a single device object.

---
 bacnet-stack/demo/handler/h_rp_tiny.c | 122 ++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 bacnet-stack/demo/handler/h_rp_tiny.c

diff --git a/bacnet-stack/demo/handler/h_rp_tiny.c b/bacnet-stack/demo/handler/h_rp_tiny.c
new file mode 100644
index 00000000..d4d35544
--- /dev/null
+++ b/bacnet-stack/demo/handler/h_rp_tiny.c
@@ -0,0 +1,122 @@
+/**************************************************************************
+*
+* Copyright (C) 2006 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 <string.h>
+#include <errno.h>
+#include "config.h"
+#include "txbuf.h"
+#include "bacdef.h"
+#include "bacdcode.h"
+#include "bacerror.h"
+#include "apdu.h"
+#include "npdu.h"
+#include "abort.h"
+#include "rp.h"
+/* demo objects */
+#include "device.h"
+
+/* note: this is a minimal handler.  See h_rp.c for another */
+
+static uint8_t Temp_Buf[MAX_APDU] = { 0 };
+
+void handler_read_property(uint8_t * service_request,
+    uint16_t service_len,
+    BACNET_ADDRESS * src, BACNET_CONFIRMED_SERVICE_DATA * service_data)
+{
+    BACNET_READ_PROPERTY_DATA data;
+    int len = 0;
+    int pdu_len = 0;
+    BACNET_NPDU_DATA npdu_data;
+    bool send = false;
+    bool error = false;
+    int bytes_sent = 0;
+    BACNET_ERROR_CLASS error_class = ERROR_CLASS_OBJECT;
+    BACNET_ERROR_CODE error_code = ERROR_CODE_UNKNOWN_OBJECT;
+    BACNET_ADDRESS my_address;
+
+    len = rp_decode_service_request(service_request, service_len, &data);
+    /* encode the NPDU portion of the packet */
+    datalink_get_my_address(&my_address);
+    npdu_encode_npdu_data(&npdu_data, false, MESSAGE_PRIORITY_NORMAL);
+    pdu_len = npdu_encode_pdu(&Handler_Transmit_Buffer[0], src,
+        &my_address, &npdu_data);
+    if (len < 0) {
+        /* bad decoding - send an abort */
+        len = abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
+            service_data->invoke_id, ABORT_REASON_OTHER, true); 
+    } else if (service_data->segmented_message) {
+        /* we don't support segmentation - send an abort */
+        len = abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
+            service_data->invoke_id,
+            ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
+    } else {
+        /* most cases will be error */
+        error = true;
+        switch (data.object_type) {
+        case OBJECT_DEVICE:
+            /* FIXME: probably need a length limitation sent with encode */
+            if (data.object_instance == Device_Object_Instance_Number()) {
+                len = Device_Encode_Property_APDU(&Temp_Buf[0],
+                    data.object_property,
+                    data.array_index, &error_class, &error_code);
+                if (len >= 0) {
+                    /* encode the APDU portion of the packet */
+                    data.application_data = &Temp_Buf[0];
+                    data.application_data_len = len;
+                    /* FIXME: probably need a length limitation sent with encode */
+                    len =
+                        rp_ack_encode_apdu(&Handler_Transmit_Buffer
+                        [pdu_len], service_data->invoke_id, &data);
+                    error = false;
+                }
+            }
+            break;
+        default:
+            break;
+        }
+    }
+    if (error) {
+        switch (len) {
+            /* BACnet APDU too small to fit data, so proper response is Abort */
+        case -2:
+            len = abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
+                service_data->invoke_id,
+                ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
+            break;
+        case -1:
+        default:
+            len = bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
+                service_data->invoke_id,
+                SERVICE_CONFIRMED_READ_PROPERTY, error_class, error_code);
+            break;
+        }
+    }
+    pdu_len += len;
+    bytes_sent = datalink_send_pdu(src, &npdu_data,
+        &Handler_Transmit_Buffer[0], pdu_len);
+
+    return;
+}