src/app/clusters/bindings/bindings.cpp

   1 /*
   2  *
   3  *    Copyright (c) 2020 Project CHIP Authors
   4  *
   5  *    Licensed under the Apache License, Version 2.0 (the "License");
   6  *    you may not use this file except in compliance with the License.
   7  *    You may obtain a copy of the License at
   8  *
   9  *        http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  *    Unless required by applicable law or agreed to in writing, software
  12  *    distributed under the License is distributed on an "AS IS" BASIS,
  13  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  *    See the License for the specific language governing permissions and
  15  *    limitations under the License.
  16  */
  17
  18 /****************************************************************************
  19  * @file
  20  * @brief Implementation for the Binding Server Cluster
  21  ***************************************************************************/
  22
  23 #include "af.h"
  24
  25 #include <app/util/binding-table.h>
  26 #include <support/logging/CHIPLogging.h>
  27
  28 using namespace chip;
  29
  30 EmberStatus prepareBinding(EmberBindingTableEntry & binding, NodeId nodeId, GroupId groupId, EndpointId endpointId,
  31                            ClusterId clusterId)
  32 {
  33     if (groupId && nodeId)
  34     {
  35         return EMBER_BAD_ARGUMENT;
  36     }
  37
  38     binding.clusterId    = clusterId;
  39     binding.local        = emberAfCurrentCommand()->apsFrame->destinationEndpoint;
  40     binding.networkIndex = 0;
  41
  42     if (groupId)
  43     {
  44         binding.type    = EMBER_MULTICAST_BINDING;
  45         binding.groupId = groupId;
  46         binding.remote  = 0;
  47     }
  48     else
  49     {
  50         binding.type   = EMBER_UNICAST_BINDING;
  51         binding.nodeId = nodeId;
  52         binding.remote = endpointId;
  53     }
  54
  55     return EMBER_SUCCESS;
  56 }
  57
  58 EmberStatus getBindingIndex(EmberBindingTableEntry & newEntry, uint8_t * bindingIndex)
  59 {
  60     EmberBindingTableEntry currentEntry;
  61     for (uint8_t i = 0; i < EMBER_BINDING_TABLE_SIZE; i++)
  62     {
  63         emberGetBinding(i, &currentEntry);
  64         if (currentEntry.type != EMBER_UNUSED_BINDING && currentEntry == newEntry)
  65         {
  66             *bindingIndex = i;
  67             return EMBER_SUCCESS;
  68         }
  69     }
  70
  71     return EMBER_NOT_FOUND;
  72 }
  73
  74 EmberStatus getUnusedBindingIndex(uint8_t * bindingIndex)
  75 {
  76     EmberBindingTableEntry currentEntry;
  77     for (uint8_t i = 0; i < EMBER_BINDING_TABLE_SIZE; i++)
  78     {
  79         emberGetBinding(i, &currentEntry);
  80         if (currentEntry.type == EMBER_UNUSED_BINDING)
  81         {
  82             *bindingIndex = i;
  83             return EMBER_SUCCESS;
  84         }
  85     }
  86
  87     return EMBER_NOT_FOUND;
  88 }
  89
  90 bool emberAfBindingClusterBindCallback(NodeId nodeId, GroupId groupId, EndpointId endpointId, ClusterId clusterId)
  91 {
  92     ChipLogDetail(Zcl, "RX: BindCallback");
  93
  94     EmberBindingTableEntry bindingEntry;
  95     if (prepareBinding(bindingEntry, nodeId, groupId, endpointId, clusterId) != EMBER_SUCCESS)
  96     {
  97         emberAfSendImmediateDefaultResponse(EMBER_ZCL_STATUS_MALFORMED_COMMAND);
  98         return true;
  99     }
 100
 101     uint8_t bindingIndex;
 102     if (getBindingIndex(bindingEntry, &bindingIndex) != EMBER_NOT_FOUND)
 103     {
 104         emberAfSendImmediateDefaultResponse(EMBER_ZCL_STATUS_DUPLICATE_EXISTS);
 105         return true;
 106     }
 107
 108     if (getUnusedBindingIndex(&bindingIndex) != EMBER_SUCCESS)
 109     {
 110         emberAfSendImmediateDefaultResponse(EMBER_ZCL_STATUS_INSUFFICIENT_SPACE);
 111         return true;
 112     }
 113
 114     emberSetBinding(bindingIndex, &bindingEntry);
 115     emberAfSendImmediateDefaultResponse(EMBER_ZCL_STATUS_SUCCESS);
 116     return true;
 117 }
 118
 119 bool emberAfBindingClusterUnbindCallback(NodeId nodeId, GroupId groupId, EndpointId endpointId, ClusterId clusterId)
 120 {
 121     ChipLogDetail(Zcl, "RX: UnbindCallback");
 122
 123     EmberBindingTableEntry bindingEntry;
 124     if (prepareBinding(bindingEntry, nodeId, groupId, endpointId, clusterId) != EMBER_SUCCESS)
 125     {
 126         emberAfSendImmediateDefaultResponse(EMBER_ZCL_STATUS_MALFORMED_COMMAND);
 127         return true;
 128     }
 129
 130     uint8_t bindingIndex;
 131     if (getBindingIndex(bindingEntry, &bindingIndex) != EMBER_SUCCESS)
 132     {
 133         emberAfSendImmediateDefaultResponse(EMBER_ZCL_STATUS_NOT_FOUND);
 134         return true;
 135     }
 136
 137     emberDeleteBinding(bindingIndex);
 138     emberAfSendImmediateDefaultResponse(EMBER_ZCL_STATUS_SUCCESS);
 139     return true;
 140 }