adjust root folder

2019-10-08 23:47:53 -05:00
parent b6fc50ddea
commit a42e8f507c
1258 changed files with 26 additions and 214 deletions
@@ -0,0 +1,112 @@
+/**************************************************************************
+*
+* Copyright (C) 2008 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 <stdbool.h>
+#include <stdint.h>
+#include "bacdef.h"
+#include "bacdcode.h"
+#include "bacint.h"
+#include "bacenum.h"
+#include "bits.h"
+#include "npdu.h"
+#include "apdu.h"
+#include "handlers.h"
+#include "client.h"
+
+#if PRINT_ENABLED
+#include <stdio.h>
+#endif
+
+/** @file h_npdu.c  Handles messages at the NPDU level of the BACnet stack. */
+
+/** Handler for the NPDU portion of a received packet.
+ *  Aside from error-checking, if the NPDU doesn't contain routing info,
+ *  this handler doesn't do much besides stepping over the NPDU header
+ *  and passing the remaining bytes to the apdu_handler.
+ *  @note The routing (except src) and NCPI information, including
+ *  npdu_data->data_expecting_reply, are discarded.
+ * @see routing_npdu_handler
+ *
+ * @ingroup MISCHNDLR
+ *
+ * @param src  [out] Returned with routing source information if the NPDU
+ *                   has any and if this points to non-null storage for it.
+ *                   If src->net and src->len are 0 on return, there is no
+ *                   routing source information.
+ *                   This src describes the original source of the message when
+ *                   it had to be routed to reach this BACnet Device, and this
+ *                   is passed down into the apdu_handler; however, I don't
+ *                   think this project's code has any use for the src info
+ *                   on return from this handler, since the response has
+ *                   already been sent via the apdu_handler.
+ *  @param pdu [in]  Buffer containing the NPDU and APDU of the received packet.
+ *  @param pdu_len [in] The size of the received message in the pdu[] buffer.
+ */
+void npdu_handler(
+    BACNET_ADDRESS * src,       /* source address */
+    uint8_t * pdu,      /* PDU data */
+    uint16_t pdu_len)
+{       /* length PDU  */
+    int apdu_offset = 0;
+    BACNET_ADDRESS dest = { 0 };
+    BACNET_NPDU_DATA npdu_data = { 0 };
+
+    /* only handle the version that we know how to handle */
+    if (pdu[0] == BACNET_PROTOCOL_VERSION) {
+        apdu_offset = npdu_decode(&pdu[0], &dest, src, &npdu_data);
+        if (npdu_data.network_layer_message) {
+            /*FIXME: network layer message received!  Handle it! */
+#if PRINT_ENABLED
+            fprintf(stderr, "NPDU: Network Layer Message discarded!\n");
+#endif
+        } else if ((apdu_offset > 0) && (apdu_offset <= pdu_len)) {
+            if ((dest.net == 0) || (dest.net == BACNET_BROADCAST_NETWORK)) {
+                /* only handle the version that we know how to handle */
+                /* and we are not a router, so ignore messages with
+                   routing information cause they are not for us */
+                if ((dest.net == BACNET_BROADCAST_NETWORK) &&
+                    ((pdu[apdu_offset] & 0xF0) ==
+                        PDU_TYPE_CONFIRMED_SERVICE_REQUEST)) {
+                    /* hack for 5.4.5.1 - IDLE */
+                    /* ConfirmedBroadcastReceived */
+                    /* then enter IDLE - ignore the PDU */
+                } else {
+                    apdu_handler(src, &pdu[apdu_offset],
+                        (uint16_t) (pdu_len - apdu_offset));
+                }
+            } else {
+#if PRINT_ENABLED
+                printf("NPDU: DNET=%u.  Discarded!\n", (unsigned) dest.net);
+#endif
+            }
+        }
+    } else {
+#if PRINT_ENABLED
+        printf("NPDU: BACnet Protocol Version=%u.  Discarded!\n",
+            (unsigned) pdu[0]);
+#endif
+    }
+
+    return;
+}