xref: /btstack/test/mock/mock_btstack_tlv.c (revision 1e2cd7c0a8d66b9fb383a0680223bf8ec81e4e13)
1 /*
2  * Copyright (C) 2021 BlueKitchen GmbH
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the copyright holders nor the names of
14  *    contributors may be used to endorse or promote products derived
15  *    from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
20  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN
21  * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
24  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
27  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  *
30  */
31 
32 #define BTSTACK_FILE__ "btstack_tlv_memory.c"
33 
34 #include <stdint.h>
35 #include <string.h>
36 #include <stdlib.h>
37 #include "btstack_linked_list.h"
38 #include "btstack_tlv.h"
39 #include "btstack_util.h"
40 #include "btstack_debug.h"
41 
42 #include "mock_btstack_tlv.h"
43 
44 #define MAX_TLV_VALUE_SIZE 200
45 #define DUMMY_SIZE 4
46 typedef struct tlv_entry {
47     void   * next;
48     uint32_t tag;
49     uint32_t len;
50     uint8_t  value[DUMMY_SIZE];	// dummy size
51 } tlv_entry_t;
52 
mock_btstack_tlv_find_entry(mock_btstack_tlv_t * self,uint32_t tag)53 static tlv_entry_t * mock_btstack_tlv_find_entry(mock_btstack_tlv_t * self, uint32_t tag){
54     btstack_linked_list_iterator_t it;
55     btstack_linked_list_iterator_init(&it, &self->entry_list);
56     while (btstack_linked_list_iterator_has_next(&it)){
57         tlv_entry_t * entry = (tlv_entry_t*) btstack_linked_list_iterator_next(&it);
58         if (entry->tag != tag) continue;
59         return entry;
60     }
61     return NULL;
62 }
63 
64 /**
65  * Get Value for Tag
66  * @param tag
67  * @param buffer
68  * @param buffer_size
69  * @return size of value
70  */
mock_btstack_tlv_get_tag(void * context,uint32_t tag,uint8_t * buffer,uint32_t buffer_size)71 static int mock_btstack_tlv_get_tag(void * context, uint32_t tag, uint8_t * buffer, uint32_t buffer_size){
72     mock_btstack_tlv_t * self = (mock_btstack_tlv_t *) context;
73     tlv_entry_t * entry = mock_btstack_tlv_find_entry(self, tag);
74     // not found
75     if (!entry) return 0;
76     // return len if buffer = NULL
77     if (!buffer) return entry->len;
78     // otherwise copy data into buffer
79     uint16_t bytes_to_copy = btstack_min(buffer_size, entry->len);
80     memcpy(buffer, &entry->value[0], bytes_to_copy);
81     return bytes_to_copy;
82 }
83 
84 /**
85  * Store Tag
86  * @param tag
87  * @param data
88  * @param data_size
89  */
mock_btstack_tlv_store_tag(void * context,uint32_t tag,const uint8_t * data,uint32_t data_size)90 static int mock_btstack_tlv_store_tag(void * context, uint32_t tag, const uint8_t * data, uint32_t data_size){
91     mock_btstack_tlv_t * self = (mock_btstack_tlv_t *) context;
92 
93     // enforce arbitrary max value size
94     btstack_assert(data_size <= MAX_TLV_VALUE_SIZE);
95 
96     // remove old entry
97     tlv_entry_t * old_entry = mock_btstack_tlv_find_entry(self, tag);
98     if (old_entry){
99         btstack_linked_list_remove(&self->entry_list, (btstack_linked_item_t *) old_entry);
100         free(old_entry);
101     }
102 
103     // create new entry
104     uint32_t entry_size = sizeof(tlv_entry_t) - DUMMY_SIZE + data_size;
105     tlv_entry_t * new_entry = (tlv_entry_t *) malloc(entry_size);
106     if (!new_entry) return 0;
107     memset(new_entry, 0, entry_size);
108     new_entry->tag = tag;
109     new_entry->len = data_size;
110     memcpy(&new_entry->value[0], data, data_size);
111 
112     // append new entry
113     btstack_linked_list_add(&self->entry_list, (btstack_linked_item_t *) new_entry);
114     return 0;
115 }
116 
117 /**
118  * Delete Tag
119  * @param tag
120  */
mock_btstack_tlv_delete_tag(void * context,uint32_t tag)121 static void mock_btstack_tlv_delete_tag(void * context, uint32_t tag){
122     mock_btstack_tlv_t * self = (mock_btstack_tlv_t *) context;
123     btstack_linked_list_iterator_t it;
124     btstack_linked_list_iterator_init(&it, &self->entry_list);
125     while (btstack_linked_list_iterator_has_next(&it)){
126         tlv_entry_t * entry = (tlv_entry_t*) btstack_linked_list_iterator_next(&it);
127         if (entry->tag != tag) continue;
128         btstack_linked_list_iterator_remove(&it);
129         free(entry);
130         return;
131     }
132 }
133 
134 static const btstack_tlv_t mock_btstack_tlv = {
135         /* int  (*get_tag)(..);     */ &mock_btstack_tlv_get_tag,
136         /* int (*store_tag)(..);    */ &mock_btstack_tlv_store_tag,
137         /* void (*delete_tag)(v..); */ &mock_btstack_tlv_delete_tag,
138 };
139 
140 /**
141  * Init Tag Length Value Store
142  */
mock_btstack_tlv_init_instance(mock_btstack_tlv_t * self)143 const btstack_tlv_t * mock_btstack_tlv_init_instance(mock_btstack_tlv_t * self){
144     memset(self, 0, sizeof(mock_btstack_tlv_t));
145     return &mock_btstack_tlv;
146 }
147 
148 /**
149  * Free TLV entries
150  * @param self
151  */
mock_btstack_tlv_deinit(mock_btstack_tlv_t * self)152 void mock_btstack_tlv_deinit(mock_btstack_tlv_t * self){
153     // free all entries
154     btstack_linked_list_iterator_t it;
155     btstack_linked_list_iterator_init(&it, &self->entry_list);
156     while (btstack_linked_list_iterator_has_next(&it)){
157         tlv_entry_t * entry = (tlv_entry_t*) btstack_linked_list_iterator_next(&it);
158         btstack_linked_list_iterator_remove(&it);
159         free(entry);
160     }
161 }
162