1 /******************************************************************************
2 *
3 * Copyright (C) 2011-2012 Broadcom Corporation
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 #include <android-base/stringprintf.h>
19 #include <base/logging.h>
20 #include <fcntl.h>
21 #include <vector>
22
23 #include "CrcChecksum.h"
24 #include "nfa_nv_ci.h"
25 #include "nfc_hal_nv_co.h"
26
27 using android::base::StringPrintf;
28
29 extern std::string nfc_storage_path;
30 extern bool nfc_debug_enabled;
31
32 namespace {
getFilenameForBlock(const unsigned block)33 std::string getFilenameForBlock(const unsigned block) {
34 std::string bin = "nfaStorage.bin";
35 return StringPrintf("%s/%s%u", nfc_storage_path.c_str(), bin.c_str(), block);
36 }
37 } // namespace
38
39 /*******************************************************************************
40 **
41 ** Function nfa_mem_co_alloc
42 **
43 ** Description allocate a buffer from platform's memory pool
44 **
45 ** Returns:
46 ** pointer to buffer if successful
47 ** NULL otherwise
48 **
49 *******************************************************************************/
nfa_mem_co_alloc(uint32_t num_bytes)50 extern void* nfa_mem_co_alloc(uint32_t num_bytes) { return malloc(num_bytes); }
51
52 /*******************************************************************************
53 **
54 ** Function nfa_mem_co_free
55 **
56 ** Description free buffer previously allocated using nfa_mem_co_alloc
57 **
58 ** Returns:
59 ** Nothing
60 **
61 *******************************************************************************/
nfa_mem_co_free(void * pBuffer)62 extern void nfa_mem_co_free(void* pBuffer) { free(pBuffer); }
63
64 /*******************************************************************************
65 **
66 ** Function nfa_nv_co_read
67 **
68 ** Description This function is called by NFA to read in data from the
69 ** previously opened file.
70 **
71 ** Parameters pBuffer - buffer to read the data into.
72 ** nbytes - number of bytes to read into the buffer.
73 **
74 ** Returns void
75 **
76 ** Note: Upon completion of the request, nfa_nv_ci_read() is
77 ** called with the buffer of data, along with the number
78 ** of bytes read into the buffer, and a status. The
79 ** call-in function should only be called when ALL
80 ** requested bytes have been read, the end of file has
81 ** been detected, or an error has occurred.
82 **
83 *******************************************************************************/
nfa_nv_co_read(uint8_t * pBuffer,uint16_t nbytes,uint8_t block)84 extern void nfa_nv_co_read(uint8_t* pBuffer, uint16_t nbytes, uint8_t block) {
85 std::string filename = getFilenameForBlock(block);
86
87 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf(
88 "%s: buffer len=%u; file=%s", __func__, nbytes, filename.c_str());
89 int fileStream = open(filename.c_str(), O_RDONLY);
90 if (fileStream >= 0) {
91 uint16_t checksum = 0;
92 read(fileStream, &checksum, sizeof(checksum));
93 size_t actualReadData = read(fileStream, pBuffer, nbytes);
94 close(fileStream);
95 if (actualReadData > 0) {
96 DLOG_IF(INFO, nfc_debug_enabled)
97 << StringPrintf("%s: data size=%zu", __func__, actualReadData);
98 nfa_nv_ci_read(actualReadData, NFA_NV_CO_OK, block);
99 } else {
100 LOG(ERROR) << StringPrintf("%s: fail to read", __func__);
101 nfa_nv_ci_read(0, NFA_NV_CO_FAIL, block);
102 }
103 } else {
104 DLOG_IF(INFO, nfc_debug_enabled)
105 << StringPrintf("%s: fail to open", __func__);
106 nfa_nv_ci_read(0, NFA_NV_CO_FAIL, block);
107 }
108 }
109
110 /*******************************************************************************
111 **
112 ** Function nfa_nv_co_write
113 **
114 ** Description This function is called by io to send file data to the
115 ** phone.
116 **
117 ** Parameters pBuffer - buffer to read the data from.
118 ** nbytes - number of bytes to write out to the file.
119 **
120 ** Returns void
121 **
122 ** Note: Upon completion of the request, nfa_nv_ci_write() is
123 ** called with the file descriptor and the status. The
124 ** call-in function should only be called when ALL
125 ** requested bytes have been written, or an error has
126 ** been detected,
127 **
128 *******************************************************************************/
nfa_nv_co_write(const uint8_t * pBuffer,uint16_t nbytes,uint8_t block)129 extern void nfa_nv_co_write(const uint8_t* pBuffer, uint16_t nbytes,
130 uint8_t block) {
131 std::string filename = getFilenameForBlock(block);
132
133 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf(
134 "%s: bytes=%u; file=%s", __func__, nbytes, filename.c_str());
135
136 int fileStream =
137 open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
138 if (fileStream >= 0) {
139 uint16_t checksum = crcChecksumCompute(pBuffer, nbytes);
140 size_t actualWrittenCrc = write(fileStream, &checksum, sizeof(checksum));
141 size_t actualWrittenData = write(fileStream, pBuffer, nbytes);
142 DLOG_IF(INFO, nfc_debug_enabled)
143 << StringPrintf("%s: %zu bytes written", __func__, actualWrittenData);
144 if ((actualWrittenData == nbytes) &&
145 (actualWrittenCrc == sizeof(checksum))) {
146 nfa_nv_ci_write(NFA_NV_CO_OK);
147 } else {
148 LOG(ERROR) << StringPrintf("%s: fail to write", __func__);
149 nfa_nv_ci_write(NFA_NV_CO_FAIL);
150 }
151 close(fileStream);
152 } else {
153 LOG(ERROR) << StringPrintf("%s: fail to open, error = %d", __func__, errno);
154 nfa_nv_ci_write(NFA_NV_CO_FAIL);
155 }
156 }
157
158 /*******************************************************************************
159 **
160 ** Function delete_stack_non_volatile_store
161 **
162 ** Description Delete all the content of the stack's storage location.
163 **
164 ** Parameters forceDelete: unconditionally delete the storage.
165 **
166 ** Returns none
167 **
168 *******************************************************************************/
delete_stack_non_volatile_store(bool forceDelete)169 void delete_stack_non_volatile_store(bool forceDelete) {
170 static bool firstTime = true;
171
172 if ((firstTime == false) && (forceDelete == false)) return;
173 firstTime = false;
174
175 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("%s", __func__);
176
177 remove(getFilenameForBlock(DH_NV_BLOCK).c_str());
178 remove(getFilenameForBlock(HC_F2_NV_BLOCK).c_str());
179 remove(getFilenameForBlock(HC_F3_NV_BLOCK).c_str());
180 remove(getFilenameForBlock(HC_F4_NV_BLOCK).c_str());
181 remove(getFilenameForBlock(HC_F5_NV_BLOCK).c_str());
182 }
183
184 /*******************************************************************************
185 **
186 ** Function verify_stack_non_volatile_store
187 **
188 ** Description Verify the content of all non-volatile store.
189 **
190 ** Parameters none
191 **
192 ** Returns none
193 **
194 *******************************************************************************/
verify_stack_non_volatile_store()195 void verify_stack_non_volatile_store() {
196 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("%s", __func__);
197
198 const std::vector<unsigned> verify_blocks = {DH_NV_BLOCK, HC_F2_NV_BLOCK,
199 HC_F3_NV_BLOCK, HC_F4_NV_BLOCK,
200 HC_F5_NV_BLOCK};
201
202 size_t verified = 0;
203 for (auto block : verify_blocks) {
204 if (!crcChecksumVerifyIntegrity(getFilenameForBlock(block).c_str())) break;
205 ++verified;
206 }
207
208 if (verified != verify_blocks.size()) delete_stack_non_volatile_store(true);
209 }
210