1 | // Copyright (c) Microsoft. All rights reserved.
|
---|
2 | // Licensed under the MIT license. See LICENSE file in the project root for full license information.
|
---|
3 |
|
---|
4 | #include <stdlib.h>
|
---|
5 | #include <limits.h>
|
---|
6 | #include "azure_c_shared_utility/optimize_size.h"
|
---|
7 | #include "azure_c_shared_utility/gballoc.h"
|
---|
8 | #include "azure_c_shared_utility/buffer_.h"
|
---|
9 | #include "azure_c_shared_utility/strings.h"
|
---|
10 | #include "azure_macro_utils/macro_utils.h"
|
---|
11 | #include "azure_c_shared_utility/xlogging.h"
|
---|
12 | #include "azure_umqtt_c/mqtt_codec.h"
|
---|
13 | #include <inttypes.h>
|
---|
14 |
|
---|
15 | #define PAYLOAD_OFFSET 5
|
---|
16 | #define PACKET_TYPE_BYTE(p) (CONTROL_PACKET_TYPE)((uint8_t)(((uint8_t)(p)) & 0xf0))
|
---|
17 | #define FLAG_VALUE_BYTE(p) ((uint8_t)(((uint8_t)(p)) & 0xf))
|
---|
18 |
|
---|
19 | #define USERNAME_FLAG 0x80
|
---|
20 | #define PASSWORD_FLAG 0x40
|
---|
21 | #define WILL_RETAIN_FLAG 0x20
|
---|
22 | #define WILL_QOS_FLAG_ 0x18
|
---|
23 | #define WILL_FLAG_FLAG 0x04
|
---|
24 | #define CLEAN_SESSION_FLAG 0x02
|
---|
25 |
|
---|
26 | #define NEXT_128_CHUNK 0x80
|
---|
27 | #define PUBLISH_DUP_FLAG 0x8
|
---|
28 | #define PUBLISH_QOS_EXACTLY_ONCE 0x4
|
---|
29 | #define PUBLISH_QOS_AT_LEAST_ONCE 0x2
|
---|
30 | #define PUBLISH_QOS_RETAIN 0x1
|
---|
31 |
|
---|
32 | #define PROTOCOL_NUMBER 4
|
---|
33 | #define CONN_FLAG_BYTE_OFFSET 7
|
---|
34 |
|
---|
35 | #define CONNECT_FIXED_HEADER_SIZE 2
|
---|
36 | #define CONNECT_VARIABLE_HEADER_SIZE 10
|
---|
37 | #define SUBSCRIBE_FIXED_HEADER_FLAG 0x2
|
---|
38 | #define UNSUBSCRIBE_FIXED_HEADER_FLAG 0x2
|
---|
39 |
|
---|
40 | #define MAX_SEND_SIZE 0xFFFFFF7F // 268435455
|
---|
41 |
|
---|
42 | // This captures the maximum packet size for 3 digits.
|
---|
43 | // If it's above this value then we bail out of the loop
|
---|
44 | #define MAX_3_DIGIT_PACKET_SIZE 2097152
|
---|
45 |
|
---|
46 | #define CODEC_STATE_VALUES \
|
---|
47 | CODEC_STATE_FIXED_HEADER, \
|
---|
48 | CODEC_STATE_VAR_HEADER, \
|
---|
49 | CODEC_STATE_PAYLOAD
|
---|
50 |
|
---|
51 | static const char* const TRUE_CONST = "true";
|
---|
52 | static const char* const FALSE_CONST = "false";
|
---|
53 |
|
---|
54 | MU_DEFINE_ENUM(CODEC_STATE_RESULT, CODEC_STATE_VALUES);
|
---|
55 |
|
---|
56 | typedef struct MQTTCODEC_INSTANCE_TAG
|
---|
57 | {
|
---|
58 | CONTROL_PACKET_TYPE currPacket;
|
---|
59 | CODEC_STATE_RESULT codecState;
|
---|
60 | size_t bufferOffset;
|
---|
61 | int headerFlags;
|
---|
62 | BUFFER_HANDLE headerData;
|
---|
63 | ON_PACKET_COMPLETE_CALLBACK packetComplete;
|
---|
64 | void* callContext;
|
---|
65 | uint8_t storeRemainLen[4];
|
---|
66 | size_t remainLenIndex;
|
---|
67 | } MQTTCODEC_INSTANCE;
|
---|
68 |
|
---|
69 | typedef struct PUBLISH_HEADER_INFO_TAG
|
---|
70 | {
|
---|
71 | const char* topicName;
|
---|
72 | uint16_t packetId;
|
---|
73 | const char* msgBuffer;
|
---|
74 | QOS_VALUE qualityOfServiceValue;
|
---|
75 | } PUBLISH_HEADER_INFO;
|
---|
76 |
|
---|
77 | static const char* retrieve_qos_value(QOS_VALUE value)
|
---|
78 | {
|
---|
79 | switch (value)
|
---|
80 | {
|
---|
81 | case DELIVER_AT_MOST_ONCE:
|
---|
82 | return "DELIVER_AT_MOST_ONCE";
|
---|
83 | case DELIVER_AT_LEAST_ONCE:
|
---|
84 | return "DELIVER_AT_LEAST_ONCE";
|
---|
85 | case DELIVER_EXACTLY_ONCE:
|
---|
86 | default:
|
---|
87 | return "DELIVER_EXACTLY_ONCE";
|
---|
88 | }
|
---|
89 | }
|
---|
90 |
|
---|
91 | static void byteutil_writeByte(uint8_t** buffer, uint8_t value)
|
---|
92 | {
|
---|
93 | if (buffer != NULL)
|
---|
94 | {
|
---|
95 | **buffer = value;
|
---|
96 | (*buffer)++;
|
---|
97 | }
|
---|
98 | }
|
---|
99 |
|
---|
100 | static void byteutil_writeInt(uint8_t** buffer, uint16_t value)
|
---|
101 | {
|
---|
102 | if (buffer != NULL)
|
---|
103 | {
|
---|
104 | **buffer = (char)(value / 256);
|
---|
105 | (*buffer)++;
|
---|
106 | **buffer = (char)(value % 256);
|
---|
107 | (*buffer)++;
|
---|
108 | }
|
---|
109 | }
|
---|
110 |
|
---|
111 | static void byteutil_writeUTF(uint8_t** buffer, const char* stringData, uint16_t len)
|
---|
112 | {
|
---|
113 | if (buffer != NULL)
|
---|
114 | {
|
---|
115 | byteutil_writeInt(buffer, len);
|
---|
116 | (void)memcpy(*buffer, stringData, len);
|
---|
117 | *buffer += len;
|
---|
118 | }
|
---|
119 | }
|
---|
120 |
|
---|
121 | static CONTROL_PACKET_TYPE processControlPacketType(uint8_t pktByte, int* flags)
|
---|
122 | {
|
---|
123 | CONTROL_PACKET_TYPE result;
|
---|
124 | result = PACKET_TYPE_BYTE(pktByte);
|
---|
125 | if (flags != NULL)
|
---|
126 | {
|
---|
127 | *flags = FLAG_VALUE_BYTE(pktByte);
|
---|
128 | }
|
---|
129 | return result;
|
---|
130 | }
|
---|
131 |
|
---|
132 | static int addListItemsToUnsubscribePacket(BUFFER_HANDLE ctrlPacket, const char** payloadList, size_t payloadCount, STRING_HANDLE trace_log)
|
---|
133 | {
|
---|
134 | int result = 0;
|
---|
135 | size_t index = 0;
|
---|
136 | for (index = 0; index < payloadCount && result == 0; index++)
|
---|
137 | {
|
---|
138 | // Add the Payload
|
---|
139 | size_t offsetLen = BUFFER_length(ctrlPacket);
|
---|
140 | size_t topicLen = strlen(payloadList[index]);
|
---|
141 | if (topicLen > USHRT_MAX)
|
---|
142 | {
|
---|
143 | result = MU_FAILURE;
|
---|
144 | }
|
---|
145 | else if (BUFFER_enlarge(ctrlPacket, topicLen + 2) != 0)
|
---|
146 | {
|
---|
147 | result = MU_FAILURE;
|
---|
148 | }
|
---|
149 | else
|
---|
150 | {
|
---|
151 | uint8_t* iterator = BUFFER_u_char(ctrlPacket);
|
---|
152 | iterator += offsetLen;
|
---|
153 | byteutil_writeUTF(&iterator, payloadList[index], (uint16_t)topicLen);
|
---|
154 | }
|
---|
155 | if (trace_log != NULL)
|
---|
156 | {
|
---|
157 | STRING_sprintf(trace_log, " | TOPIC_NAME: %s", payloadList[index]);
|
---|
158 | }
|
---|
159 | }
|
---|
160 | return result;
|
---|
161 | }
|
---|
162 |
|
---|
163 | static int addListItemsToSubscribePacket(BUFFER_HANDLE ctrlPacket, SUBSCRIBE_PAYLOAD* payloadList, size_t payloadCount, STRING_HANDLE trace_log)
|
---|
164 | {
|
---|
165 | int result = 0;
|
---|
166 | size_t index = 0;
|
---|
167 | for (index = 0; index < payloadCount && result == 0; index++)
|
---|
168 | {
|
---|
169 | // Add the Payload
|
---|
170 | size_t offsetLen = BUFFER_length(ctrlPacket);
|
---|
171 | size_t topicLen = strlen(payloadList[index].subscribeTopic);
|
---|
172 | if (topicLen > USHRT_MAX)
|
---|
173 | {
|
---|
174 | result = MU_FAILURE;
|
---|
175 | }
|
---|
176 | else if (BUFFER_enlarge(ctrlPacket, topicLen + 2 + 1) != 0)
|
---|
177 | {
|
---|
178 | result = MU_FAILURE;
|
---|
179 | }
|
---|
180 | else
|
---|
181 | {
|
---|
182 | uint8_t* iterator = BUFFER_u_char(ctrlPacket);
|
---|
183 | iterator += offsetLen;
|
---|
184 | byteutil_writeUTF(&iterator, payloadList[index].subscribeTopic, (uint16_t)topicLen);
|
---|
185 | *iterator = payloadList[index].qosReturn;
|
---|
186 |
|
---|
187 | if (trace_log != NULL)
|
---|
188 | {
|
---|
189 | STRING_sprintf(trace_log, " | TOPIC_NAME: %s | QOS: %d", payloadList[index].subscribeTopic, (int)payloadList[index].qosReturn);
|
---|
190 | }
|
---|
191 | }
|
---|
192 | }
|
---|
193 | return result;
|
---|
194 | }
|
---|
195 |
|
---|
196 | static int constructConnectVariableHeader(BUFFER_HANDLE ctrlPacket, const MQTT_CLIENT_OPTIONS* mqttOptions, STRING_HANDLE trace_log)
|
---|
197 | {
|
---|
198 | int result = 0;
|
---|
199 | if (BUFFER_enlarge(ctrlPacket, CONNECT_VARIABLE_HEADER_SIZE) != 0)
|
---|
200 | {
|
---|
201 | result = MU_FAILURE;
|
---|
202 | }
|
---|
203 | else
|
---|
204 | {
|
---|
205 | uint8_t* iterator = BUFFER_u_char(ctrlPacket);
|
---|
206 | if (iterator == NULL)
|
---|
207 | {
|
---|
208 | result = MU_FAILURE;
|
---|
209 | }
|
---|
210 | else
|
---|
211 | {
|
---|
212 | if (trace_log != NULL)
|
---|
213 | {
|
---|
214 | STRING_sprintf(trace_log, " | VER: %d | KEEPALIVE: %d | FLAGS:", PROTOCOL_NUMBER, mqttOptions->keepAliveInterval);
|
---|
215 | }
|
---|
216 | byteutil_writeUTF(&iterator, "MQTT", 4);
|
---|
217 | byteutil_writeByte(&iterator, PROTOCOL_NUMBER);
|
---|
218 | byteutil_writeByte(&iterator, 0); // Flags will be entered later
|
---|
219 | byteutil_writeInt(&iterator, mqttOptions->keepAliveInterval);
|
---|
220 | result = 0;
|
---|
221 | }
|
---|
222 | }
|
---|
223 | return result;
|
---|
224 | }
|
---|
225 |
|
---|
226 | static int constructPublishVariableHeader(BUFFER_HANDLE ctrlPacket, const PUBLISH_HEADER_INFO* publishHeader, STRING_HANDLE trace_log)
|
---|
227 | {
|
---|
228 | int result = 0;
|
---|
229 | size_t topicLen = 0;
|
---|
230 | size_t spaceLen = 0;
|
---|
231 | size_t idLen = 0;
|
---|
232 |
|
---|
233 | size_t currLen = BUFFER_length(ctrlPacket);
|
---|
234 |
|
---|
235 | topicLen = strlen(publishHeader->topicName);
|
---|
236 | spaceLen += 2;
|
---|
237 |
|
---|
238 | if (publishHeader->qualityOfServiceValue != DELIVER_AT_MOST_ONCE)
|
---|
239 | {
|
---|
240 | // Packet Id is only set if the QOS is not 0
|
---|
241 | idLen = 2;
|
---|
242 | }
|
---|
243 |
|
---|
244 | if (topicLen > USHRT_MAX)
|
---|
245 | {
|
---|
246 | result = MU_FAILURE;
|
---|
247 | }
|
---|
248 | else if (BUFFER_enlarge(ctrlPacket, topicLen + idLen + spaceLen) != 0)
|
---|
249 | {
|
---|
250 | result = MU_FAILURE;
|
---|
251 | }
|
---|
252 | else
|
---|
253 | {
|
---|
254 | uint8_t* iterator = BUFFER_u_char(ctrlPacket);
|
---|
255 | if (iterator == NULL)
|
---|
256 | {
|
---|
257 | result = MU_FAILURE;
|
---|
258 | }
|
---|
259 | else
|
---|
260 | {
|
---|
261 | iterator += currLen;
|
---|
262 | /* The Topic Name MUST be present as the first field in the PUBLISH Packet Variable header.It MUST be 792 a UTF-8 encoded string [MQTT-3.3.2-1] as defined in section 1.5.3.*/
|
---|
263 | byteutil_writeUTF(&iterator, publishHeader->topicName, (uint16_t)topicLen);
|
---|
264 | if (trace_log != NULL)
|
---|
265 | {
|
---|
266 | STRING_sprintf(trace_log, " | TOPIC_NAME: %s", publishHeader->topicName);
|
---|
267 | }
|
---|
268 | if (idLen > 0)
|
---|
269 | {
|
---|
270 | if (trace_log != NULL)
|
---|
271 | {
|
---|
272 | STRING_sprintf(trace_log, " | PACKET_ID: %"PRIu16, publishHeader->packetId);
|
---|
273 | }
|
---|
274 | byteutil_writeInt(&iterator, publishHeader->packetId);
|
---|
275 | }
|
---|
276 | result = 0;
|
---|
277 | }
|
---|
278 | }
|
---|
279 | return result;
|
---|
280 | }
|
---|
281 |
|
---|
282 | static int constructSubscibeTypeVariableHeader(BUFFER_HANDLE ctrlPacket, uint16_t packetId)
|
---|
283 | {
|
---|
284 | int result = 0;
|
---|
285 | if (BUFFER_enlarge(ctrlPacket, 2) != 0)
|
---|
286 | {
|
---|
287 | result = MU_FAILURE;
|
---|
288 | }
|
---|
289 | else
|
---|
290 | {
|
---|
291 | uint8_t* iterator = BUFFER_u_char(ctrlPacket);
|
---|
292 | if (iterator == NULL)
|
---|
293 | {
|
---|
294 | result = MU_FAILURE;
|
---|
295 | }
|
---|
296 | else
|
---|
297 | {
|
---|
298 | byteutil_writeInt(&iterator, packetId);
|
---|
299 | result = 0;
|
---|
300 | }
|
---|
301 | }
|
---|
302 | return result;
|
---|
303 | }
|
---|
304 |
|
---|
305 | static BUFFER_HANDLE constructPublishReply(CONTROL_PACKET_TYPE type, uint8_t flags, uint16_t packetId)
|
---|
306 | {
|
---|
307 | BUFFER_HANDLE result = BUFFER_new();
|
---|
308 | if (result != NULL)
|
---|
309 | {
|
---|
310 | if (BUFFER_pre_build(result, 4) != 0)
|
---|
311 | {
|
---|
312 | BUFFER_delete(result);
|
---|
313 | result = NULL;
|
---|
314 | }
|
---|
315 | else
|
---|
316 | {
|
---|
317 | uint8_t* iterator = BUFFER_u_char(result);
|
---|
318 | if (iterator == NULL)
|
---|
319 | {
|
---|
320 | BUFFER_delete(result);
|
---|
321 | result = NULL;
|
---|
322 | }
|
---|
323 | else
|
---|
324 | {
|
---|
325 | *iterator = (uint8_t)type | flags;
|
---|
326 | iterator++;
|
---|
327 | *iterator = 0x2;
|
---|
328 | iterator++;
|
---|
329 | byteutil_writeInt(&iterator, packetId);
|
---|
330 | }
|
---|
331 | }
|
---|
332 | }
|
---|
333 | return result;
|
---|
334 | }
|
---|
335 |
|
---|
336 | static int constructFixedHeader(BUFFER_HANDLE ctrlPacket, CONTROL_PACKET_TYPE packetType, uint8_t flags)
|
---|
337 | {
|
---|
338 | int result;
|
---|
339 | size_t packetLen = BUFFER_length(ctrlPacket);
|
---|
340 | uint8_t remainSize[4] ={ 0 };
|
---|
341 | size_t index = 0;
|
---|
342 |
|
---|
343 | // Calculate the length of packet
|
---|
344 | do
|
---|
345 | {
|
---|
346 | uint8_t encode = packetLen % 128;
|
---|
347 | packetLen /= 128;
|
---|
348 | // if there are more data to encode, set the top bit of this byte
|
---|
349 | if (packetLen > 0)
|
---|
350 | {
|
---|
351 | encode |= NEXT_128_CHUNK;
|
---|
352 | }
|
---|
353 | remainSize[index++] = encode;
|
---|
354 | } while (packetLen > 0);
|
---|
355 |
|
---|
356 | BUFFER_HANDLE fixedHeader = BUFFER_new();
|
---|
357 | if (fixedHeader == NULL)
|
---|
358 | {
|
---|
359 | result = MU_FAILURE;
|
---|
360 | }
|
---|
361 | else if (BUFFER_pre_build(fixedHeader, index + 1) != 0)
|
---|
362 | {
|
---|
363 | BUFFER_delete(fixedHeader);
|
---|
364 | result = MU_FAILURE;
|
---|
365 | }
|
---|
366 | else
|
---|
367 | {
|
---|
368 | uint8_t* iterator = BUFFER_u_char(fixedHeader);
|
---|
369 | *iterator = (uint8_t)packetType | flags;
|
---|
370 | iterator++;
|
---|
371 | (void)memcpy(iterator, remainSize, index);
|
---|
372 |
|
---|
373 | result = BUFFER_prepend(ctrlPacket, fixedHeader);
|
---|
374 | BUFFER_delete(fixedHeader);
|
---|
375 | }
|
---|
376 | return result;
|
---|
377 | }
|
---|
378 |
|
---|
379 | static int constructConnPayload(BUFFER_HANDLE ctrlPacket, const MQTT_CLIENT_OPTIONS* mqttOptions, STRING_HANDLE trace_log)
|
---|
380 | {
|
---|
381 | int result = 0;
|
---|
382 | size_t clientLen = 0;
|
---|
383 | size_t usernameLen = 0;
|
---|
384 | size_t passwordLen = 0;
|
---|
385 | size_t willMessageLen = 0;
|
---|
386 | size_t willTopicLen = 0;
|
---|
387 | size_t spaceLen = 0;
|
---|
388 | size_t currLen = 0;
|
---|
389 | size_t totalLen = 0;
|
---|
390 |
|
---|
391 | if (mqttOptions->clientId != NULL)
|
---|
392 | {
|
---|
393 | spaceLen += 2;
|
---|
394 | clientLen = strlen(mqttOptions->clientId);
|
---|
395 | }
|
---|
396 | if (mqttOptions->username != NULL)
|
---|
397 | {
|
---|
398 | spaceLen += 2;
|
---|
399 | usernameLen = strlen(mqttOptions->username);
|
---|
400 | }
|
---|
401 | if (mqttOptions->password != NULL)
|
---|
402 | {
|
---|
403 | spaceLen += 2;
|
---|
404 | passwordLen = strlen(mqttOptions->password);
|
---|
405 | }
|
---|
406 | if (mqttOptions->willMessage != NULL)
|
---|
407 | {
|
---|
408 | spaceLen += 2;
|
---|
409 | willMessageLen = strlen(mqttOptions->willMessage);
|
---|
410 | }
|
---|
411 | if (mqttOptions->willTopic != NULL)
|
---|
412 | {
|
---|
413 | spaceLen += 2;
|
---|
414 | willTopicLen = strlen(mqttOptions->willTopic);
|
---|
415 | }
|
---|
416 |
|
---|
417 | currLen = BUFFER_length(ctrlPacket);
|
---|
418 | totalLen = clientLen + usernameLen + passwordLen + willMessageLen + willTopicLen + spaceLen;
|
---|
419 |
|
---|
420 | // Validate the Username & Password
|
---|
421 | if (clientLen > USHRT_MAX)
|
---|
422 | {
|
---|
423 | result = MU_FAILURE;
|
---|
424 | }
|
---|
425 | else if (usernameLen == 0 && passwordLen > 0)
|
---|
426 | {
|
---|
427 | result = MU_FAILURE;
|
---|
428 | }
|
---|
429 | else if ((willMessageLen > 0 && willTopicLen == 0) || (willTopicLen > 0 && willMessageLen == 0))
|
---|
430 | {
|
---|
431 | result = MU_FAILURE;
|
---|
432 | }
|
---|
433 | else if (BUFFER_enlarge(ctrlPacket, totalLen) != 0)
|
---|
434 | {
|
---|
435 | result = MU_FAILURE;
|
---|
436 | }
|
---|
437 | else
|
---|
438 | {
|
---|
439 | uint8_t* packet = BUFFER_u_char(ctrlPacket);
|
---|
440 | uint8_t* iterator = packet;
|
---|
441 |
|
---|
442 | iterator += currLen;
|
---|
443 | byteutil_writeUTF(&iterator, mqttOptions->clientId, (uint16_t)clientLen);
|
---|
444 |
|
---|
445 | // TODO: Read on the Will Topic
|
---|
446 | if (willMessageLen > USHRT_MAX || willTopicLen > USHRT_MAX || usernameLen > USHRT_MAX || passwordLen > USHRT_MAX)
|
---|
447 | {
|
---|
448 | result = MU_FAILURE;
|
---|
449 | }
|
---|
450 | else
|
---|
451 | {
|
---|
452 | STRING_HANDLE connect_payload_trace = NULL;
|
---|
453 | if (trace_log != NULL)
|
---|
454 | {
|
---|
455 | connect_payload_trace = STRING_new();
|
---|
456 | }
|
---|
457 | if (willMessageLen > 0 && willTopicLen > 0)
|
---|
458 | {
|
---|
459 | if (trace_log != NULL)
|
---|
460 | {
|
---|
461 | (void)STRING_sprintf(connect_payload_trace, " | WILL_TOPIC: %s", mqttOptions->willTopic);
|
---|
462 | }
|
---|
463 | packet[CONN_FLAG_BYTE_OFFSET] |= WILL_FLAG_FLAG;
|
---|
464 | byteutil_writeUTF(&iterator, mqttOptions->willTopic, (uint16_t)willTopicLen);
|
---|
465 | packet[CONN_FLAG_BYTE_OFFSET] |= (mqttOptions->qualityOfServiceValue << 3);
|
---|
466 | if (mqttOptions->messageRetain)
|
---|
467 | {
|
---|
468 | packet[CONN_FLAG_BYTE_OFFSET] |= WILL_RETAIN_FLAG;
|
---|
469 | }
|
---|
470 | byteutil_writeUTF(&iterator, mqttOptions->willMessage, (uint16_t)willMessageLen);
|
---|
471 | }
|
---|
472 | if (usernameLen > 0)
|
---|
473 | {
|
---|
474 | packet[CONN_FLAG_BYTE_OFFSET] |= USERNAME_FLAG;
|
---|
475 | byteutil_writeUTF(&iterator, mqttOptions->username, (uint16_t)usernameLen);
|
---|
476 | if (trace_log != NULL)
|
---|
477 | {
|
---|
478 | (void)STRING_sprintf(connect_payload_trace, " | USERNAME: %s", mqttOptions->username);
|
---|
479 | }
|
---|
480 | }
|
---|
481 | if (passwordLen > 0)
|
---|
482 | {
|
---|
483 | packet[CONN_FLAG_BYTE_OFFSET] |= PASSWORD_FLAG;
|
---|
484 | byteutil_writeUTF(&iterator, mqttOptions->password, (uint16_t)passwordLen);
|
---|
485 | if (trace_log != NULL)
|
---|
486 | {
|
---|
487 | (void)STRING_sprintf(connect_payload_trace, " | PWD: XXXX");
|
---|
488 | }
|
---|
489 | }
|
---|
490 | // TODO: Get the rest of the flags
|
---|
491 | if (trace_log != NULL)
|
---|
492 | {
|
---|
493 | (void)STRING_sprintf(connect_payload_trace, " | CLEAN: %s", mqttOptions->useCleanSession ? "1" : "0");
|
---|
494 | }
|
---|
495 | if (mqttOptions->useCleanSession)
|
---|
496 | {
|
---|
497 | packet[CONN_FLAG_BYTE_OFFSET] |= CLEAN_SESSION_FLAG;
|
---|
498 | }
|
---|
499 | if (trace_log != NULL)
|
---|
500 | {
|
---|
501 | (void)STRING_sprintf(trace_log, " %lu", packet[CONN_FLAG_BYTE_OFFSET]);
|
---|
502 | (void)STRING_concat_with_STRING(trace_log, connect_payload_trace);
|
---|
503 | STRING_delete(connect_payload_trace);
|
---|
504 | }
|
---|
505 | result = 0;
|
---|
506 | }
|
---|
507 | }
|
---|
508 | return result;
|
---|
509 | }
|
---|
510 |
|
---|
511 | static int prepareheaderDataInfo(MQTTCODEC_INSTANCE* codecData, uint8_t remainLen)
|
---|
512 | {
|
---|
513 | int result;
|
---|
514 | result = 0;
|
---|
515 | codecData->storeRemainLen[codecData->remainLenIndex++] = remainLen;
|
---|
516 | if (remainLen <= 0x7f)
|
---|
517 | {
|
---|
518 | int multiplier = 1;
|
---|
519 | int totalLen = 0;
|
---|
520 | size_t index = 0;
|
---|
521 | uint8_t encodeByte = 0;
|
---|
522 | do
|
---|
523 | {
|
---|
524 | encodeByte = codecData->storeRemainLen[index++];
|
---|
525 | totalLen += (encodeByte & 127) * multiplier;
|
---|
526 | multiplier *= NEXT_128_CHUNK;
|
---|
527 |
|
---|
528 | if (multiplier > MAX_3_DIGIT_PACKET_SIZE)
|
---|
529 | {
|
---|
530 | result = MU_FAILURE;
|
---|
531 | break;
|
---|
532 | }
|
---|
533 | } while ((encodeByte & NEXT_128_CHUNK) != 0);
|
---|
534 |
|
---|
535 | if (result != 0 || totalLen > MAX_SEND_SIZE)
|
---|
536 | {
|
---|
537 | LogError("Receive buffer too large for MQTT packet");
|
---|
538 | result = MU_FAILURE;
|
---|
539 | }
|
---|
540 | else
|
---|
541 | {
|
---|
542 | codecData->codecState = CODEC_STATE_VAR_HEADER;
|
---|
543 |
|
---|
544 | // Reset remainLen Index
|
---|
545 | codecData->remainLenIndex = 0;
|
---|
546 | memset(codecData->storeRemainLen, 0, 4 * sizeof(uint8_t));
|
---|
547 |
|
---|
548 | if (totalLen > 0)
|
---|
549 | {
|
---|
550 | codecData->bufferOffset = 0;
|
---|
551 | codecData->headerData = BUFFER_new();
|
---|
552 | if (codecData->headerData == NULL)
|
---|
553 | {
|
---|
554 | /* Codes_SRS_MQTT_CODEC_07_035: [ If any error is encountered then the packet state will be marked as error and mqtt_codec_bytesReceived shall return a non-zero value. ] */
|
---|
555 | LogError("Failed BUFFER_new");
|
---|
556 | result = MU_FAILURE;
|
---|
557 | }
|
---|
558 | else
|
---|
559 | {
|
---|
560 | if (BUFFER_pre_build(codecData->headerData, totalLen) != 0)
|
---|
561 | {
|
---|
562 | /* Codes_SRS_MQTT_CODEC_07_035: [ If any error is encountered then the packet state will be marked as error and mqtt_codec_bytesReceived shall return a non-zero value. ] */
|
---|
563 | LogError("Failed BUFFER_pre_build");
|
---|
564 | result = MU_FAILURE;
|
---|
565 | }
|
---|
566 |
|
---|
567 | }
|
---|
568 | }
|
---|
569 | }
|
---|
570 | }
|
---|
571 | return result;
|
---|
572 | }
|
---|
573 |
|
---|
574 | static void completePacketData(MQTTCODEC_INSTANCE* codecData)
|
---|
575 | {
|
---|
576 | if (codecData->packetComplete != NULL)
|
---|
577 | {
|
---|
578 | codecData->packetComplete(codecData->callContext, codecData->currPacket, codecData->headerFlags, codecData->headerData);
|
---|
579 | }
|
---|
580 |
|
---|
581 | // Clean up data
|
---|
582 | codecData->currPacket = UNKNOWN_TYPE;
|
---|
583 | codecData->codecState = CODEC_STATE_FIXED_HEADER;
|
---|
584 | codecData->headerFlags = 0;
|
---|
585 | BUFFER_delete(codecData->headerData);
|
---|
586 | codecData->headerData = NULL;
|
---|
587 | }
|
---|
588 |
|
---|
589 | static void clear_codec_data(MQTTCODEC_INSTANCE* codec_data)
|
---|
590 | {
|
---|
591 | // Clear the code instance data
|
---|
592 | codec_data->currPacket = UNKNOWN_TYPE;
|
---|
593 | codec_data->codecState = CODEC_STATE_FIXED_HEADER;
|
---|
594 | codec_data->headerFlags = 0;
|
---|
595 | codec_data->bufferOffset = 0;
|
---|
596 | codec_data->headerData = NULL;
|
---|
597 | memset(codec_data->storeRemainLen, 0, 4 * sizeof(uint8_t));
|
---|
598 | codec_data->remainLenIndex = 0;
|
---|
599 | }
|
---|
600 |
|
---|
601 | void mqtt_codec_reset(MQTTCODEC_HANDLE handle)
|
---|
602 | {
|
---|
603 | if (handle != NULL)
|
---|
604 | {
|
---|
605 | clear_codec_data(handle);
|
---|
606 | }
|
---|
607 | }
|
---|
608 |
|
---|
609 | MQTTCODEC_HANDLE mqtt_codec_create(ON_PACKET_COMPLETE_CALLBACK packetComplete, void* callbackCtx)
|
---|
610 | {
|
---|
611 | MQTTCODEC_HANDLE result;
|
---|
612 | result = malloc(sizeof(MQTTCODEC_INSTANCE));
|
---|
613 | /* Codes_SRS_MQTT_CODEC_07_001: [If a failure is encountered then mqtt_codec_create shall return NULL.] */
|
---|
614 | if (result != NULL)
|
---|
615 | {
|
---|
616 | /* Codes_SRS_MQTT_CODEC_07_002: [On success mqtt_codec_create shall return a MQTTCODEC_HANDLE value.] */
|
---|
617 | clear_codec_data(result);
|
---|
618 | result->packetComplete = packetComplete;
|
---|
619 | result->callContext = callbackCtx;
|
---|
620 | }
|
---|
621 | return result;
|
---|
622 | }
|
---|
623 |
|
---|
624 | void mqtt_codec_destroy(MQTTCODEC_HANDLE handle)
|
---|
625 | {
|
---|
626 | /* Codes_SRS_MQTT_CODEC_07_003: [If the handle parameter is NULL then mqtt_codec_destroy shall do nothing.] */
|
---|
627 | if (handle != NULL)
|
---|
628 | {
|
---|
629 | MQTTCODEC_INSTANCE* codecData = (MQTTCODEC_INSTANCE*)handle;
|
---|
630 | /* Codes_SRS_MQTT_CODEC_07_004: [mqtt_codec_destroy shall deallocate all memory that has been allocated by this object.] */
|
---|
631 | BUFFER_delete(codecData->headerData);
|
---|
632 | free(codecData);
|
---|
633 | }
|
---|
634 | }
|
---|
635 |
|
---|
636 | BUFFER_HANDLE mqtt_codec_connect(const MQTT_CLIENT_OPTIONS* mqttOptions, STRING_HANDLE trace_log)
|
---|
637 | {
|
---|
638 | BUFFER_HANDLE result;
|
---|
639 | /* Codes_SRS_MQTT_CODEC_07_008: [If the parameters mqttOptions is NULL then mqtt_codec_connect shall return a null value.] */
|
---|
640 | if (mqttOptions == NULL)
|
---|
641 | {
|
---|
642 | result = NULL;
|
---|
643 | }
|
---|
644 | else
|
---|
645 | {
|
---|
646 | /* Codes_SRS_MQTT_CODEC_07_009: [mqtt_codec_connect shall construct a BUFFER_HANDLE that represents a MQTT CONNECT packet.] */
|
---|
647 | result = BUFFER_new();
|
---|
648 | if (result != NULL)
|
---|
649 | {
|
---|
650 | STRING_HANDLE varible_header_log = NULL;
|
---|
651 | if (trace_log != NULL)
|
---|
652 | {
|
---|
653 | varible_header_log = STRING_new();
|
---|
654 | }
|
---|
655 | // Add Variable Header Information
|
---|
656 | if (constructConnectVariableHeader(result, mqttOptions, varible_header_log) != 0)
|
---|
657 | {
|
---|
658 | /* Codes_SRS_MQTT_CODEC_07_010: [If any error is encountered then mqtt_codec_connect shall return NULL.] */
|
---|
659 | BUFFER_delete(result);
|
---|
660 | result = NULL;
|
---|
661 | }
|
---|
662 | else
|
---|
663 | {
|
---|
664 | if (constructConnPayload(result, mqttOptions, varible_header_log) != 0)
|
---|
665 | {
|
---|
666 | /* Codes_SRS_MQTT_CODEC_07_010: [If any error is encountered then mqtt_codec_connect shall return NULL.] */
|
---|
667 | BUFFER_delete(result);
|
---|
668 | result = NULL;
|
---|
669 | }
|
---|
670 | else
|
---|
671 | {
|
---|
672 | if (trace_log != NULL)
|
---|
673 | {
|
---|
674 | (void)STRING_copy(trace_log, "CONNECT");
|
---|
675 | }
|
---|
676 | if (constructFixedHeader(result, CONNECT_TYPE, 0) != 0)
|
---|
677 | {
|
---|
678 | /* Codes_SRS_MQTT_CODEC_07_010: [If any error is encountered then mqtt_codec_connect shall return NULL.] */
|
---|
679 | BUFFER_delete(result);
|
---|
680 | result = NULL;
|
---|
681 | }
|
---|
682 | else
|
---|
683 | {
|
---|
684 | if (trace_log != NULL)
|
---|
685 | {
|
---|
686 | (void)STRING_concat_with_STRING(trace_log, varible_header_log);
|
---|
687 | }
|
---|
688 | }
|
---|
689 | }
|
---|
690 | if (varible_header_log != NULL)
|
---|
691 | {
|
---|
692 | STRING_delete(varible_header_log);
|
---|
693 | }
|
---|
694 | }
|
---|
695 | }
|
---|
696 | }
|
---|
697 | return result;
|
---|
698 | }
|
---|
699 |
|
---|
700 | BUFFER_HANDLE mqtt_codec_disconnect()
|
---|
701 | {
|
---|
702 | /* Codes_SRS_MQTT_CODEC_07_011: [On success mqtt_codec_disconnect shall construct a BUFFER_HANDLE that represents a MQTT DISCONNECT packet.] */
|
---|
703 | BUFFER_HANDLE result = BUFFER_new();
|
---|
704 | if (result != NULL)
|
---|
705 | {
|
---|
706 | if (BUFFER_enlarge(result, 2) != 0)
|
---|
707 | {
|
---|
708 | /* Codes_SRS_MQTT_CODEC_07_012: [If any error is encountered mqtt_codec_disconnect shall return NULL.] */
|
---|
709 | BUFFER_delete(result);
|
---|
710 | result = NULL;
|
---|
711 | }
|
---|
712 | else
|
---|
713 | {
|
---|
714 | uint8_t* iterator = BUFFER_u_char(result);
|
---|
715 | if (iterator == NULL)
|
---|
716 | {
|
---|
717 | /* Codes_SRS_MQTT_CODEC_07_012: [If any error is encountered mqtt_codec_disconnect shall return NULL.] */
|
---|
718 | BUFFER_delete(result);
|
---|
719 | result = NULL;
|
---|
720 | }
|
---|
721 | else
|
---|
722 | {
|
---|
723 | iterator[0] = DISCONNECT_TYPE;
|
---|
724 | iterator[1] = 0;
|
---|
725 | }
|
---|
726 | }
|
---|
727 | }
|
---|
728 | return result;
|
---|
729 | }
|
---|
730 |
|
---|
731 | BUFFER_HANDLE mqtt_codec_publish(QOS_VALUE qosValue, bool duplicateMsg, bool serverRetain, uint16_t packetId, const char* topicName, const uint8_t* msgBuffer, size_t buffLen, STRING_HANDLE trace_log)
|
---|
732 | {
|
---|
733 | BUFFER_HANDLE result;
|
---|
734 | /* Codes_SRS_MQTT_CODEC_07_005: [If the parameters topicName is NULL then mqtt_codec_publish shall return NULL.] */
|
---|
735 | if (topicName == NULL)
|
---|
736 | {
|
---|
737 | result = NULL;
|
---|
738 | }
|
---|
739 | /* Codes_SRS_MQTT_CODEC_07_036: [mqtt_codec_publish shall return NULL if the buffLen variable is greater than the MAX_SEND_SIZE (0xFFFFFF7F).] */
|
---|
740 | else if (buffLen > MAX_SEND_SIZE)
|
---|
741 | {
|
---|
742 | /* Codes_SRS_MQTT_CODEC_07_006: [If any error is encountered then mqtt_codec_publish shall return NULL.] */
|
---|
743 | result = NULL;
|
---|
744 | }
|
---|
745 | else
|
---|
746 | {
|
---|
747 | PUBLISH_HEADER_INFO publishInfo ={ 0 };
|
---|
748 | publishInfo.topicName = topicName;
|
---|
749 | publishInfo.packetId = packetId;
|
---|
750 | publishInfo.qualityOfServiceValue = qosValue;
|
---|
751 |
|
---|
752 | uint8_t headerFlags = 0;
|
---|
753 | if (duplicateMsg) headerFlags |= PUBLISH_DUP_FLAG;
|
---|
754 | if (serverRetain) headerFlags |= PUBLISH_QOS_RETAIN;
|
---|
755 | if (qosValue != DELIVER_AT_MOST_ONCE)
|
---|
756 | {
|
---|
757 | if (qosValue == DELIVER_AT_LEAST_ONCE)
|
---|
758 | {
|
---|
759 | headerFlags |= PUBLISH_QOS_AT_LEAST_ONCE;
|
---|
760 | }
|
---|
761 | else
|
---|
762 | {
|
---|
763 | headerFlags |= PUBLISH_QOS_EXACTLY_ONCE;
|
---|
764 | }
|
---|
765 | }
|
---|
766 |
|
---|
767 | /* Codes_SRS_MQTT_CODEC_07_007: [mqtt_codec_publish shall return a BUFFER_HANDLE that represents a MQTT PUBLISH message.] */
|
---|
768 | result = BUFFER_new();
|
---|
769 | if (result != NULL)
|
---|
770 | {
|
---|
771 | STRING_HANDLE varible_header_log = NULL;
|
---|
772 | if (trace_log != NULL)
|
---|
773 | {
|
---|
774 | varible_header_log = STRING_construct_sprintf(" | IS_DUP: %s | RETAIN: %d | QOS: %s", duplicateMsg ? TRUE_CONST : FALSE_CONST,
|
---|
775 | serverRetain ? 1 : 0,
|
---|
776 | retrieve_qos_value(publishInfo.qualityOfServiceValue) );
|
---|
777 | }
|
---|
778 |
|
---|
779 | if (constructPublishVariableHeader(result, &publishInfo, varible_header_log) != 0)
|
---|
780 | {
|
---|
781 | /* Codes_SRS_MQTT_CODEC_07_006: [If any error is encountered then mqtt_codec_publish shall return NULL.] */
|
---|
782 | BUFFER_delete(result);
|
---|
783 | result = NULL;
|
---|
784 | }
|
---|
785 | else
|
---|
786 | {
|
---|
787 | size_t payloadOffset = BUFFER_length(result);
|
---|
788 | if (buffLen > 0)
|
---|
789 | {
|
---|
790 | if (BUFFER_enlarge(result, buffLen) != 0)
|
---|
791 | {
|
---|
792 | /* Codes_SRS_MQTT_CODEC_07_006: [If any error is encountered then mqtt_codec_publish shall return NULL.] */
|
---|
793 | BUFFER_delete(result);
|
---|
794 | result = NULL;
|
---|
795 | }
|
---|
796 | else
|
---|
797 | {
|
---|
798 | uint8_t* iterator = BUFFER_u_char(result);
|
---|
799 | if (iterator == NULL)
|
---|
800 | {
|
---|
801 | /* Codes_SRS_MQTT_CODEC_07_006: [If any error is encountered then mqtt_codec_publish shall return NULL.] */
|
---|
802 | BUFFER_delete(result);
|
---|
803 | result = NULL;
|
---|
804 | }
|
---|
805 | else
|
---|
806 | {
|
---|
807 | iterator += payloadOffset;
|
---|
808 | // Write Message
|
---|
809 | (void)memcpy(iterator, msgBuffer, buffLen);
|
---|
810 | if (trace_log)
|
---|
811 | {
|
---|
812 | STRING_sprintf(varible_header_log, " | PAYLOAD_LEN: %lu", (unsigned long)buffLen);
|
---|
813 | }
|
---|
814 | }
|
---|
815 | }
|
---|
816 | }
|
---|
817 |
|
---|
818 | if (result != NULL)
|
---|
819 | {
|
---|
820 | if (trace_log != NULL)
|
---|
821 | {
|
---|
822 | (void)STRING_copy(trace_log, "PUBLISH");
|
---|
823 | }
|
---|
824 | if (constructFixedHeader(result, PUBLISH_TYPE, headerFlags) != 0)
|
---|
825 | {
|
---|
826 | /* Codes_SRS_MQTT_CODEC_07_006: [If any error is encountered then mqtt_codec_publish shall return NULL.] */
|
---|
827 | BUFFER_delete(result);
|
---|
828 | result = NULL;
|
---|
829 | }
|
---|
830 | else
|
---|
831 | {
|
---|
832 | if (trace_log != NULL)
|
---|
833 | {
|
---|
834 | (void)STRING_concat_with_STRING(trace_log, varible_header_log);
|
---|
835 | }
|
---|
836 | }
|
---|
837 | }
|
---|
838 | }
|
---|
839 | if (varible_header_log != NULL)
|
---|
840 | {
|
---|
841 | STRING_delete(varible_header_log);
|
---|
842 | }
|
---|
843 | }
|
---|
844 | }
|
---|
845 | return result;
|
---|
846 | }
|
---|
847 |
|
---|
848 | BUFFER_HANDLE mqtt_codec_publishAck(uint16_t packetId)
|
---|
849 | {
|
---|
850 | /* Codes_SRS_MQTT_CODEC_07_013: [On success mqtt_codec_publishAck shall return a BUFFER_HANDLE representation of a MQTT PUBACK packet.] */
|
---|
851 | /* Codes_SRS_MQTT_CODEC_07_014 : [If any error is encountered then mqtt_codec_publishAck shall return NULL.] */
|
---|
852 | BUFFER_HANDLE result = constructPublishReply(PUBACK_TYPE, 0, packetId);
|
---|
853 | return result;
|
---|
854 | }
|
---|
855 |
|
---|
856 | BUFFER_HANDLE mqtt_codec_publishReceived(uint16_t packetId)
|
---|
857 | {
|
---|
858 | /* Codes_SRS_MQTT_CODEC_07_015: [On success mqtt_codec_publishRecieved shall return a BUFFER_HANDLE representation of a MQTT PUBREC packet.] */
|
---|
859 | /* Codes_SRS_MQTT_CODEC_07_016 : [If any error is encountered then mqtt_codec_publishRecieved shall return NULL.] */
|
---|
860 | BUFFER_HANDLE result = constructPublishReply(PUBREC_TYPE, 0, packetId);
|
---|
861 | return result;
|
---|
862 | }
|
---|
863 |
|
---|
864 | BUFFER_HANDLE mqtt_codec_publishRelease(uint16_t packetId)
|
---|
865 | {
|
---|
866 | /* Codes_SRS_MQTT_CODEC_07_017: [On success mqtt_codec_publishRelease shall return a BUFFER_HANDLE representation of a MQTT PUBREL packet.] */
|
---|
867 | /* Codes_SRS_MQTT_CODEC_07_018 : [If any error is encountered then mqtt_codec_publishRelease shall return NULL.] */
|
---|
868 | BUFFER_HANDLE result = constructPublishReply(PUBREL_TYPE, 2, packetId);
|
---|
869 | return result;
|
---|
870 | }
|
---|
871 |
|
---|
872 | BUFFER_HANDLE mqtt_codec_publishComplete(uint16_t packetId)
|
---|
873 | {
|
---|
874 | /* Codes_SRS_MQTT_CODEC_07_019: [On success mqtt_codec_publishComplete shall return a BUFFER_HANDLE representation of a MQTT PUBCOMP packet.] */
|
---|
875 | /* Codes_SRS_MQTT_CODEC_07_020 : [If any error is encountered then mqtt_codec_publishComplete shall return NULL.] */
|
---|
876 | BUFFER_HANDLE result = constructPublishReply(PUBCOMP_TYPE, 0, packetId);
|
---|
877 | return result;
|
---|
878 | }
|
---|
879 |
|
---|
880 | BUFFER_HANDLE mqtt_codec_ping()
|
---|
881 | {
|
---|
882 | /* Codes_SRS_MQTT_CODEC_07_021: [On success mqtt_codec_ping shall construct a BUFFER_HANDLE that represents a MQTT PINGREQ packet.] */
|
---|
883 | BUFFER_HANDLE result = BUFFER_new();
|
---|
884 | if (result != NULL)
|
---|
885 | {
|
---|
886 | if (BUFFER_enlarge(result, 2) != 0)
|
---|
887 | {
|
---|
888 | /* Codes_SRS_MQTT_CODEC_07_022: [If any error is encountered mqtt_codec_ping shall return NULL.] */
|
---|
889 | BUFFER_delete(result);
|
---|
890 | result = NULL;
|
---|
891 | }
|
---|
892 | else
|
---|
893 | {
|
---|
894 | uint8_t* iterator = BUFFER_u_char(result);
|
---|
895 | if (iterator == NULL)
|
---|
896 | {
|
---|
897 | /* Codes_SRS_MQTT_CODEC_07_022: [If any error is encountered mqtt_codec_ping shall return NULL.] */
|
---|
898 | BUFFER_delete(result);
|
---|
899 | result = NULL;
|
---|
900 | }
|
---|
901 | else
|
---|
902 | {
|
---|
903 | iterator[0] = PINGREQ_TYPE;
|
---|
904 | iterator[1] = 0;
|
---|
905 | }
|
---|
906 | }
|
---|
907 | }
|
---|
908 | return result;
|
---|
909 | }
|
---|
910 |
|
---|
911 | BUFFER_HANDLE mqtt_codec_subscribe(uint16_t packetId, SUBSCRIBE_PAYLOAD* subscribeList, size_t count, STRING_HANDLE trace_log)
|
---|
912 | {
|
---|
913 | BUFFER_HANDLE result;
|
---|
914 | /* Codes_SRS_MQTT_CODEC_07_023: [If the parameters subscribeList is NULL or if count is 0 then mqtt_codec_subscribe shall return NULL.] */
|
---|
915 | if (subscribeList == NULL || count == 0)
|
---|
916 | {
|
---|
917 | result = NULL;
|
---|
918 | }
|
---|
919 | else
|
---|
920 | {
|
---|
921 | /* Codes_SRS_MQTT_CODEC_07_026: [mqtt_codec_subscribe shall return a BUFFER_HANDLE that represents a MQTT SUBSCRIBE message.]*/
|
---|
922 | result = BUFFER_new();
|
---|
923 | if (result != NULL)
|
---|
924 | {
|
---|
925 | if (constructSubscibeTypeVariableHeader(result, packetId) != 0)
|
---|
926 | {
|
---|
927 | /* Codes_SRS_MQTT_CODEC_07_025: [If any error is encountered then mqtt_codec_subscribe shall return NULL.] */
|
---|
928 | BUFFER_delete(result);
|
---|
929 | result = NULL;
|
---|
930 | }
|
---|
931 | else
|
---|
932 | {
|
---|
933 | STRING_HANDLE sub_trace = NULL;
|
---|
934 | if (trace_log != NULL)
|
---|
935 | {
|
---|
936 | sub_trace = STRING_construct_sprintf(" | PACKET_ID: %"PRIu16, packetId);
|
---|
937 | }
|
---|
938 | /* Codes_SRS_MQTT_CODEC_07_024: [mqtt_codec_subscribe shall iterate through count items in the subscribeList.] */
|
---|
939 | if (addListItemsToSubscribePacket(result, subscribeList, count, sub_trace) != 0)
|
---|
940 | {
|
---|
941 | /* Codes_SRS_MQTT_CODEC_07_025: [If any error is encountered then mqtt_codec_subscribe shall return NULL.] */
|
---|
942 | BUFFER_delete(result);
|
---|
943 | result = NULL;
|
---|
944 | }
|
---|
945 | else
|
---|
946 | {
|
---|
947 |
|
---|
948 | if (trace_log != NULL)
|
---|
949 | {
|
---|
950 | STRING_concat(trace_log, "SUBSCRIBE");
|
---|
951 | }
|
---|
952 | if (constructFixedHeader(result, SUBSCRIBE_TYPE, SUBSCRIBE_FIXED_HEADER_FLAG) != 0)
|
---|
953 | {
|
---|
954 | /* Codes_SRS_MQTT_CODEC_07_025: [If any error is encountered then mqtt_codec_subscribe shall return NULL.] */
|
---|
955 | BUFFER_delete(result);
|
---|
956 | result = NULL;
|
---|
957 | }
|
---|
958 | else
|
---|
959 | {
|
---|
960 | if (trace_log != NULL)
|
---|
961 | {
|
---|
962 | (void)STRING_concat_with_STRING(trace_log, sub_trace);
|
---|
963 | }
|
---|
964 | }
|
---|
965 | }
|
---|
966 | if (sub_trace != NULL)
|
---|
967 | {
|
---|
968 | STRING_delete(sub_trace);
|
---|
969 | }
|
---|
970 | }
|
---|
971 | }
|
---|
972 | }
|
---|
973 | return result;
|
---|
974 | }
|
---|
975 |
|
---|
976 | BUFFER_HANDLE mqtt_codec_unsubscribe(uint16_t packetId, const char** unsubscribeList, size_t count, STRING_HANDLE trace_log)
|
---|
977 | {
|
---|
978 | BUFFER_HANDLE result;
|
---|
979 | /* Codes_SRS_MQTT_CODEC_07_027: [If the parameters unsubscribeList is NULL or if count is 0 then mqtt_codec_unsubscribe shall return NULL.] */
|
---|
980 | if (unsubscribeList == NULL || count == 0)
|
---|
981 | {
|
---|
982 | result = NULL;
|
---|
983 | }
|
---|
984 | else
|
---|
985 | {
|
---|
986 | /* Codes_SRS_MQTT_CODEC_07_030: [mqtt_codec_unsubscribe shall return a BUFFER_HANDLE that represents a MQTT SUBSCRIBE message.] */
|
---|
987 | result = BUFFER_new();
|
---|
988 | if (result != NULL)
|
---|
989 | {
|
---|
990 | if (constructSubscibeTypeVariableHeader(result, packetId) != 0)
|
---|
991 | {
|
---|
992 | /* Codes_SRS_MQTT_CODEC_07_029: [If any error is encountered then mqtt_codec_unsubscribe shall return NULL.] */
|
---|
993 | BUFFER_delete(result);
|
---|
994 | result = NULL;
|
---|
995 | }
|
---|
996 | else
|
---|
997 | {
|
---|
998 | STRING_HANDLE unsub_trace = NULL;
|
---|
999 | if (trace_log != NULL)
|
---|
1000 | {
|
---|
1001 | unsub_trace = STRING_construct_sprintf(" | PACKET_ID: %"PRIu16, packetId);
|
---|
1002 | }
|
---|
1003 | /* Codes_SRS_MQTT_CODEC_07_028: [mqtt_codec_unsubscribe shall iterate through count items in the unsubscribeList.] */
|
---|
1004 | if (addListItemsToUnsubscribePacket(result, unsubscribeList, count, unsub_trace) != 0)
|
---|
1005 | {
|
---|
1006 | /* Codes_SRS_MQTT_CODEC_07_029: [If any error is encountered then mqtt_codec_unsubscribe shall return NULL.] */
|
---|
1007 | BUFFER_delete(result);
|
---|
1008 | result = NULL;
|
---|
1009 | }
|
---|
1010 | else
|
---|
1011 | {
|
---|
1012 | if (trace_log != NULL)
|
---|
1013 | {
|
---|
1014 | (void)STRING_copy(trace_log, "UNSUBSCRIBE");
|
---|
1015 | }
|
---|
1016 | if (constructFixedHeader(result, UNSUBSCRIBE_TYPE, UNSUBSCRIBE_FIXED_HEADER_FLAG) != 0)
|
---|
1017 | {
|
---|
1018 | /* Codes_SRS_MQTT_CODEC_07_029: [If any error is encountered then mqtt_codec_unsubscribe shall return NULL.] */
|
---|
1019 | BUFFER_delete(result);
|
---|
1020 | result = NULL;
|
---|
1021 | }
|
---|
1022 | else
|
---|
1023 | {
|
---|
1024 | if (trace_log != NULL)
|
---|
1025 | {
|
---|
1026 | (void)STRING_concat_with_STRING(trace_log, unsub_trace);
|
---|
1027 | }
|
---|
1028 | }
|
---|
1029 | }
|
---|
1030 | if (unsub_trace != NULL)
|
---|
1031 | {
|
---|
1032 | STRING_delete(unsub_trace);
|
---|
1033 | }
|
---|
1034 | }
|
---|
1035 | }
|
---|
1036 | }
|
---|
1037 | return result;
|
---|
1038 | }
|
---|
1039 |
|
---|
1040 | int mqtt_codec_bytesReceived(MQTTCODEC_HANDLE handle, const unsigned char* buffer, size_t size)
|
---|
1041 | {
|
---|
1042 | int result;
|
---|
1043 | MQTTCODEC_INSTANCE* codec_Data = (MQTTCODEC_INSTANCE*)handle;
|
---|
1044 | /* Codes_SRS_MQTT_CODEC_07_031: [If the parameters handle or buffer is NULL then mqtt_codec_bytesReceived shall return a non-zero value.] */
|
---|
1045 | if (codec_Data == NULL)
|
---|
1046 | {
|
---|
1047 | result = MU_FAILURE;
|
---|
1048 | }
|
---|
1049 | /* Codes_SRS_MQTT_CODEC_07_031: [If the parameters handle or buffer is NULL then mqtt_codec_bytesReceived shall return a non-zero value.] */
|
---|
1050 | /* Codes_SRS_MQTT_CODEC_07_032: [If the parameters size is zero then mqtt_codec_bytesReceived shall return a non-zero value.] */
|
---|
1051 | else if (buffer == NULL || size == 0)
|
---|
1052 | {
|
---|
1053 | codec_Data->currPacket = PACKET_TYPE_ERROR;
|
---|
1054 | result = MU_FAILURE;
|
---|
1055 | }
|
---|
1056 | else
|
---|
1057 | {
|
---|
1058 | /* Codes_SRS_MQTT_CODEC_07_033: [mqtt_codec_bytesReceived constructs a sequence of bytes into the corresponding MQTT packets and on success returns zero.] */
|
---|
1059 | result = 0;
|
---|
1060 | size_t index = 0;
|
---|
1061 | for (index = 0; index < size && result == 0; index++)
|
---|
1062 | {
|
---|
1063 | uint8_t iterator = ((int8_t*)buffer)[index];
|
---|
1064 | if (codec_Data->codecState == CODEC_STATE_FIXED_HEADER)
|
---|
1065 | {
|
---|
1066 | if (codec_Data->currPacket == UNKNOWN_TYPE)
|
---|
1067 | {
|
---|
1068 | codec_Data->currPacket = processControlPacketType(iterator, &codec_Data->headerFlags);
|
---|
1069 | }
|
---|
1070 | else
|
---|
1071 | {
|
---|
1072 | if (prepareheaderDataInfo(codec_Data, iterator) != 0)
|
---|
1073 | {
|
---|
1074 | /* Codes_SRS_MQTT_CODEC_07_035: [If any error is encountered then the packet state will be marked as error and mqtt_codec_bytesReceived shall return a non-zero value.] */
|
---|
1075 | codec_Data->currPacket = PACKET_TYPE_ERROR;
|
---|
1076 | result = MU_FAILURE;
|
---|
1077 | }
|
---|
1078 | else if (codec_Data->currPacket == PINGRESP_TYPE)
|
---|
1079 | {
|
---|
1080 | /* Codes_SRS_MQTT_CODEC_07_034: [Upon a constructing a complete MQTT packet mqtt_codec_bytesReceived shall call the ON_PACKET_COMPLETE_CALLBACK function.] */
|
---|
1081 | completePacketData(codec_Data);
|
---|
1082 | }
|
---|
1083 | }
|
---|
1084 | }
|
---|
1085 | else if (codec_Data->codecState == CODEC_STATE_VAR_HEADER)
|
---|
1086 | {
|
---|
1087 | if (codec_Data->headerData == NULL)
|
---|
1088 | {
|
---|
1089 | codec_Data->codecState = CODEC_STATE_PAYLOAD;
|
---|
1090 | }
|
---|
1091 | else
|
---|
1092 | {
|
---|
1093 | uint8_t* dataBytes = BUFFER_u_char(codec_Data->headerData);
|
---|
1094 | if (dataBytes == NULL)
|
---|
1095 | {
|
---|
1096 | /* Codes_SRS_MQTT_CODEC_07_035: [If any error is encountered then the packet state will be marked as error and mqtt_codec_bytesReceived shall return a non-zero value.] */
|
---|
1097 | codec_Data->currPacket = PACKET_TYPE_ERROR;
|
---|
1098 | result = MU_FAILURE;
|
---|
1099 | }
|
---|
1100 | else
|
---|
1101 | {
|
---|
1102 | // Increment the data
|
---|
1103 | dataBytes += codec_Data->bufferOffset++;
|
---|
1104 | *dataBytes = iterator;
|
---|
1105 |
|
---|
1106 | size_t totalLen = BUFFER_length(codec_Data->headerData);
|
---|
1107 | if (codec_Data->bufferOffset >= totalLen)
|
---|
1108 | {
|
---|
1109 | /* Codes_SRS_MQTT_CODEC_07_034: [Upon a constructing a complete MQTT packet mqtt_codec_bytesReceived shall call the ON_PACKET_COMPLETE_CALLBACK function.] */
|
---|
1110 | completePacketData(codec_Data);
|
---|
1111 | }
|
---|
1112 | }
|
---|
1113 | }
|
---|
1114 | }
|
---|
1115 | else
|
---|
1116 | {
|
---|
1117 | /* Codes_SRS_MQTT_CODEC_07_035: [If any error is encountered then the packet state will be marked as error and mqtt_codec_bytesReceived shall return a non-zero value.] */
|
---|
1118 | codec_Data->currPacket = PACKET_TYPE_ERROR;
|
---|
1119 | result = MU_FAILURE;
|
---|
1120 | }
|
---|
1121 | }
|
---|
1122 | }
|
---|
1123 | return result;
|
---|
1124 | }
|
---|