1: /*************************************************************************
2: * (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
6: * $Id: aitmqtt.h,v 1.3.4.14 2022/09/16 04:14:03 misho Exp $
7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004 - 2022
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #ifndef __AITMQTT_H
47: #define __AITMQTT_H
48:
49:
50: #define MQTT_CONNID_MAX 24
51: #define MQTT_CRED_MAX 13
52: #define MQTTMSG_MAX 65535
53: #define MQTTMSG_BIN_MAX 65535
54: #define MQTT_DATA_MAX 268435455
55:
56: #define MQTT_PROTO_VER_3 3
57: #define MQTT_PROTO_VER_311 4
58: #define MQTT_PROTO_VER_5 5
59: #define MQTT_KEEPALIVE 60
60:
61: /* FIXED HEADER */
62:
63: struct mqtthdr {
64: union {
65: struct {
66: unsigned char retain:1,
67: qos:2,
68: dup:1,
69: type:4;
70: };
71: unsigned char val;
72: } mqtt_msg;
73: unsigned char mqtt_len[1]; /* may be grow to 4 bytes */
74: } __attribute__((packed));
75: #define MQTTHDR_MSGINIT(x) (assert((x)), (x)->mqtt_msg.val ^= (x)->mqtt_msg.val, *(x)->mqtt_len = 0)
76: #define MQTTHDR_DATA_SIZEOF(x) (assert((x)), mqtt_decodeLen((x)->mqtt_len, NULL))
77:
78: typedef union {
79: struct {
80: unsigned short m:8,
81: l:8;
82: } sb;
83: unsigned short val;
84: } __attribute__((packed)) mqtt_len_t;
85:
86: typedef struct {
87: mqtt_len_t var_sb;
88: unsigned char var_data[0];
89: } __attribute__((packed)) mqtthdr_var_t;
90: #define MQTTHDR_VAR_SIZEOF(x) (assert((x)), sizeof(mqtt_len_t) + ntohs((x)->var_sb.val))
91:
92: typedef union {
93: struct {
94: unsigned char reserved:1,
95: clean_sess:1,
96: will_flg:1,
97: will_qos:2,
98: will_retain:1,
99: password:1,
100: username:1;
101: };
102: unsigned char flags;
103: } __attribute__((packed)) mqtthdr_connflgs_t;
104:
105: typedef struct {
106: unsigned char reserved;
107: unsigned char retcode;
108: } __attribute__((packed)) mqtthdr_connack_t;
109:
110: #define MQTT_TYPE_UNKNOWN 0 /* reserved */
111: #define MQTT_TYPE_CONNECT 1 /* client request to connect to server (CLI) */
112: #define MQTT_TYPE_CONNACK 2 /* connect acknowledgment (SRV) [ret_no_data] */
113: #define MQTT_TYPE_PUBLISH 3 /* publish message [ret_is_optional] */
114: #define MQTT_TYPE_PUBACK 4 /* publish acknowledgment [ret_no_data] */
115: #define MQTT_TYPE_PUBREC 5 /* publish received (assured delivery part 1) [ret_no_data] */
116: #define MQTT_TYPE_PUBREL 6 /* publish release (assured delivery part 2) [ret_no_data] */
117: #define MQTT_TYPE_PUBCOMP 7 /* publish complete (assured delivery part 3) [ret_no_data] */
118: #define MQTT_TYPE_SUBSCRIBE 8 /* client subscribe request (CLI) */
119: #define MQTT_TYPE_SUBACK 9 /* subscribe acknowledgment (SRV) */
120: #define MQTT_TYPE_UNSUBSCRIBE 10 /* client unsubscribe request (CLI) */
121: #define MQTT_TYPE_UNSUBACK 11 /* unsubscribe acknowledgment (SRV) */
122: #define MQTT_TYPE_PINGREQ 12 /* PING request (CLI) [ret_no_data] */
123: #define MQTT_TYPE_PINGRESP 13 /* PING response (SRV) [ret_no_data] */
124: #define MQTT_TYPE_DISCONNECT 14 /* client is disconnecting [ret_no_data] */
125: #define MQTT_TYPE_AUTH 15 /* authentication exchange [ret_no_data] */
126:
127: #define MQTT_TYPE_MAX 15
128:
129: #define MQTT_FLAG_DUP 1 /* This flag is set when the client or server attempts to re-deliver
130: a PUBLISH, PUBREL, SUBSCRIBE or UNSUBSCRIBE message.
131: This applies to messages where the value of QoS is greater than
132: zero (0), and an acknowledgment is required.
133: When the DUP bit is set, the variable header includes a Message ID.
134:
135: The recipient should treat this flag as a hint as to whether
136: the message may have been previously received.
137: It should not be relied on to detect duplicates. */
138:
139: #define MQTT_QOS_ONCE 0 /* At most once, Fire and Forget, <=1 */
140: #define MQTT_QOS_ACK 1 /* At least once, Acknowledged delivery, >=1 */
141: #define MQTT_QOS_EXACTLY 2 /* Exactly once, Assured delivery, =1 */
142: #define MQTT_QOS_RESERVED 3 /* reserved */
143:
144: #define MQTT_QOS_DENY 0 /* Not granted QoS for SUBACK */
145: #define MQTT_QOS_PASS 2 /* Granted QoS for SUBACK */
146:
147: #define MQTT_FLAG_RETAIN 1 /* This flag is only used on PUBLISH messages.
148:
149: When a client sends a PUBLISH to a server,
150: if the Retain flag is set (1),
151: the server should hold on to the message after it has been
152: delivered to the current subscribers.
153: When a new subscription is established on a topic,
154: the last retained message on that topic should be sent to
155: the subscriber with the Retain flag set.
156: If there is no retained message, nothing is sent
157: This is useful where publishers send messages on a
158: "report by exception" basis, where it might be some time between messages.
159: This allows new subscribers to instantly receive data with the retained,
160: or Last Known Good, value.
161:
162: When a server sends a PUBLISH to a client as a result of
163: a subscription that already existed when the original PUBLISH arrived,
164: the Retain flag should not be set, regardless of the Retain flag
165: of the original PUBLISH. This allows a client to distinguish messages
166: that are being received because they were retained and those
167: that are being received "live".
168:
169: Retained messages should be kept over restarts of the server.
170: A server may delete a retained message if it receives a message
171: with a zero-length payload and the Retain flag set on the same topic. */
172:
173: /* VARIABLE HEADERS */
174:
175: #define MQTT_RETCODE_ACCEPTED 0
176: #define MQTT_RETCODE_REFUSE_VER 1
177: #define MQTT_RETCODE_REFUSE_ID 2
178: #define MQTT_RETCODE_REFUSE_UNAVAIL 3
179: #define MQTT_RETCODE_REFUSE_USERPASS 4
180: #define MQTT_RETCODE_DENIED 5
181:
182: /* REASON CODES */
183:
184: #define MQTT_REASON_OK 0x0 /* CONNACK, PUBACK, PUBREC, PUBREL, PUBCOMP, UNSUBACK, AUTH, DISCONNECT, SUBACK */
185: #define MQTT_REASON_QOS1 0x1 /* SUBACK */
186: #define MQTT_REASON_QOS2 0x2 /* SUBACK */
187: #define MQTT_REASON_DWILL 0x4 /* DISCONNECT */
188: #define MQTT_REASON_NOMATCH 0x10 /* PUBACK, PUBREC */
189: #define MQTT_REASON_NOSUBEXIST 0x11 /* UNSUBACK */
190: #define MQTT_REASON_CONTAUTH 0x18 /* AUTH */
191: #define MQTT_REASON_REAUTH 0x19 /* AUTH */
192:
193: /* REASON ERROR CODES */
194:
195: #define MQTT_REASON_ERROR 0x80 /* CONNACK, PUBACK, PUBREC, SUBACK, UNSUBACK, DISCONNECT */
196: #define MQTT_REASON_MALFORMPKT 0x81 /* CONNACK, DISCONNECT */
197: #define MQTT_REASON_PROTOERR 0x82 /* CONNACK, DISCONNECT */
198: #define MQTT_REASON_IMPLSPECERR 0x83 /* CONNACK, PUBACK, PUBREC, SUBACK, UNSUBACK, DISCONNECT */
199: #define MQTT_REASON_UNSUPVERPROTO 0x84 /* CONNACK */
200: #define MQTT_REASON_CLINOVALID 0x85 /* CONNACK */
201: #define MQTT_REASON_BADUSERPASS 0x86 /* CONNACK */
202: #define MQTT_REASON_NOAUTH 0x87 /* CONNACK, PUBACK, PUBREC, SUBACK, UNSUBACK, DISCONNECT */
203: #define MQTT_REASON_SRVUNAVAIL 0x88 /* CONNACK */
204: #define MQTT_REASON_SRVBUSY 0x89 /* CONNACK, DISCONNECT */
205: #define MQTT_REASON_BANNED 0x8A /* CONNACK */
206: #define MQTT_REASON_SRVSHUTDOWN 0x8B /* DISCONNECT */
207: #define MQTT_REASON_BADAUTHMETHOD 0x8C /* CONNACK, DISCONNECT */
208: #define MQTT_REASON_KEEPALIVETO 0x8D /* DISCONNECT */
209: #define MQTT_REASON_SESTAKEOVER 0x8E /* DISCONNECT */
210: #define MQTT_REASON_TOPICFLTINVAL 0x8F /* SUBACK, UNSUBACK, DISCONNECT */
211: #define MQTT_REASON_TOPICNAMEINV 0x90 /* CONNACK, PUBACK, PUBREC, DISCONNECT */
212: #define MQTT_REASON_PKTIDINUSE 0x91 /* PUBACK, PUBREC, SUBACK, UNSUBACK */
213: #define MQTT_REASON_PKTIDNOTFOUND 0x92 /* PUBREL, PUBCOMP */
214: #define MQTT_REASON_RCVMAXEXCEED 0x93 /* DISCONNECT */
215: #define MQTT_REASON_TOPICALIASINV 0x94 /* DISCONNECT */
216: #define MQTT_REASON_PKTTOOLARGE 0x95 /* CONNACK, DISCONNECT */
217: #define MQTT_REASON_MSGRATETOHIGH 0x96 /* DISCONNECT */
218: #define MQTT_REASON_QUOTAEXCEED 0x97 /* CONNACK, PUBACK, PUBREC, SUBACK, DISCONNECT */
219: #define MQTT_REASON_ADMINACTION 0x98 /* DISCONNECT */
220: #define MQTT_REASON_PAYLOADFMTINV 0x99 /* CONNACK, PUBACK, PUBREC, DISCONNECT */
221: #define MQTT_REASON_RETAINNOTSUP 0x9A /* CONNACK, DISCONNECT */
222: #define MQTT_REASON_QOSNOTSUP 0x9B /* CONNACK, DISCONNECT */
223: #define MQTT_REASON_USENEXTSRV 0x9C /* CONNACK, DISCONNECT */
224: #define MQTT_REASON_SRVMOVED 0x9D /* CONNACK, DISCONNECT */
225: #define MQTT_REASON_SHARSUBNOTSUP 0x9E /* SUBACK, DISCONNECT */
226: #define MQTT_REASON_CONRATEEXCEED 0x9F /* CONNACK, DISCONNECT */
227: #define MQTT_REASON_MAXCONNTIME 0xA0 /* DISCONNECT */
228: #define MQTT_REASON_SUBIDNOTSUP 0xA1 /* SUBACK, DISCONNECT */
229: #define MQTT_RESON_WILDSUBNOTSUP 0xA2 /* SUBACK, DISCONNECT */
230:
231: /* MQTT Message buffer */
232:
233: typedef struct {
234: void *msg_base;
235: unsigned int msg_len;
236: } mqtt_msg_t;
237:
238: /* MQTT structures */
239:
240: typedef struct {
241: unsigned char sub_qos;
242: mqtt_msg_t sub_topic;
243: mqtt_msg_t sub_value;
244: } mqtt_subscr_t;
245:
246:
247: // -------------------------------------------------------
248: // mqtt_GetErrno() Get error code of last operation
249: int mqtt_GetErrno();
250: // mqtt_GetError() Get error text of last operation
251: const char *mqtt_GetError();
252: // -------------------------------------------------------
253:
254:
255: /*
256: * mqtt_msgAlloc() Allocate memory for MQTT Message
257: *
258: * @len = >0 Allocate buffer with length
259: * return: NULL error or Message, after use must call mqtt_msgFree() with all!=0
260: */
261: mqtt_msg_t *mqtt_msgAlloc(unsigned int len);
262: /*
263: * mqtt_msgFree() Free MQTT message
264: *
265: * @msg = Message buffer
266: * @keepmsg = !=0 just free message content
267: * return: none
268: */
269: void mqtt_msgFree(mqtt_msg_t ** __restrict msg, int keepmsg);
270: /*
271: * mqtt_msgRealloc() Reallocate MQTT message buffer
272: *
273: * @msg = MQTT message
274: * @len = new length
275: * return: -1 error or >-1 old buffer length
276: */
277: int mqtt_msgRealloc(mqtt_msg_t * __restrict msg, unsigned int len);
278: /*
279: * mqtt_msgDup() - Duplicate message buffer
280: *
281: * @msg = Message
282: * return: NULL error or !=NULL duplicated message, after use must call mqtt_msgFree() with all!=0
283: */
284: mqtt_msg_t *mqtt_msgDup(mqtt_msg_t * __restrict msg);
285:
286: /*
287: * mqtt_expandTopic() - Expanding topic to regular expression
288: *
289: * @csInput = Input topic
290: * @psRegEx = Output to regular expression
291: * @regexLen = Length of psRegEx
292: * @BOL = Begin of Line, if =0 not added
293: * @EOL = End of Line, if =0 not appended
294: * return: -1 error, 0 nothing expanded or >0 expanded bytes
295: */
296: int mqtt_expandTopic(const char *csInput, char * __restrict psRegEx, int regexLen,
297: unsigned char BOL, unsigned char EOL);
298: /*
299: * mqtt_sqlTopic() - Expanding topic to SQL search string
300: *
301: * @csInput = Input topic
302: * @psSQL = Output to SQL search string
303: * @sqlLen = Length of psSQL
304: * return: -1 error, 0 changed bytes
305: */
306: int mqtt_sqlTopic(const char *csInput, char * __restrict psSQL, int sqlLen);
307:
308: /*
309: * mqtt_encodeLen() Encode number to MQTT length field
310: *
311: * @num = number for encode
312: * return: -1 error or >-1 length
313: */
314: unsigned int mqtt_encodeLen(unsigned int num);
315: /*
316: * mqtt_decodeLen() Decode length from MQTT packet
317: *
318: * @len = length from MQTT header
319: * @n = sizeof bytes, if !=NULL
320: * return: -1 error, >-1 length of message
321: */
322: unsigned int mqtt_decodeLen(void * __restrict len, int * __restrict n);
323: /*
324: * mqtt_sizeLen Return sizeof len field
325: *
326: * @len = length
327: * return: -1 error, >-1 sizeof len in bytes
328: */
329: char mqtt_sizeLen(unsigned int len);
330: /*
331: * mqtt_pktLen() - Get total packet length
332: *
333: * @hdr = MQTT packet header
334: * return: packet length
335: */
336: unsigned int mqtt_pktLen(struct mqtthdr * __restrict hdr);
337: /*
338: * mqtt_strs2subs Create MQTT subscribe variable from string(s)
339: *
340: * @csStr = null terminated string array
341: * @strnum = copy at most number of strings elements, ==0 till NULL element
342: * @qoses = QoS elements applied to subscribe variable,
343: * count of elements must be equal with csStr elements
344: * return: NULL error or != subscribe variables array, must be free after use with mqtt_freeSub()
345: */
346: mqtt_subscr_t *mqtt_strs2subs(const char **csStr, unsigned short strnum, unsigned char *qoses);
347: /*
348: * mqtt_subFree() Free array from subscribe variables
349: *
350: * @subs = Subscribe variables
351: * return: none
352: */
353: void mqtt_subFree(mqtt_subscr_t ** __restrict subs);
354: /*
355: * mqtt_subAlloc() Create array from subscribe variables
356: *
357: * @num = Number of elements
358: * return: NULL error or subscribe array, after use must call mqtt_subFree()
359: */
360: mqtt_subscr_t *mqtt_subAlloc(unsigned short num);
361: /*
362: * mqtt_subRealloc() Reallocate array from subscribe variables
363: *
364: * @subs = Subscribe array
365: * @num = Number of elements
366: * return: NULL error or subscribe array, after use must call mqtt_subFree()
367: */
368: mqtt_subscr_t *mqtt_subRealloc(mqtt_subscr_t ** __restrict subs, unsigned short num);
369: /*
370: * mqtt_subCopy() - Copy subscription structure to another one
371: *
372: * @dst = destination subscription
373: * @src = source subscription
374: * return: =NULL error or !=NULL successful copied a structure
375: */
376: mqtt_subscr_t *mqtt_subCopy(mqtt_subscr_t * __restrict dst, mqtt_subscr_t * __restrict src);
377:
378:
379: /*** SENDER FUNCTIONS ***/
380:
381: /*
382: * mqtt_msgCONNECT() Create CONNECT message
383: *
384: * @csConnID = ConnectID
385: * @Version = MQTT version, if =0 default version is 3.1.1
386: * @KASec = Keep alive timeout, if =0 default timeout for MQTT
387: * @csUser = Username if !=NULL
388: * @csPass = Password for Username, only if csUser is set
389: * @csWillTopic = Will Topic if !=NULL Will Flags set into message
390: * @csWillMessage = Will Message, may be NULL
391: * @ClrSess = Clear Session subscriptions after disconnect
392: * @WillQOS = Will QOS if csWillTopic is set
393: * @WillRetain = Will Retain Will Message if csWillTopic is set
394: * return: NULL error or allocated CONNECT message
395: */
396: mqtt_msg_t *mqtt_msgCONNECT(const char *csConnID, unsigned char Version,
397: unsigned short KASec, const char *csUser, const char *csPass,
398: const char *csWillTopic, const char *csWillMessage,
399: unsigned char ClrSess, unsigned char WillQOS, unsigned char WillRetain);
400: /*
401: * mqtt_msgCONNACK() Create CONNACK message
402: *
403: * @retcode = Return code
404: * return: NULL error or allocated CONNACK message
405: */
406: mqtt_msg_t *mqtt_msgCONNACK(unsigned char retcode);
407: /*
408: * mqtt_msgDISCONNECT() Create DISCONNECT message
409: *
410: * return: NULL error or allocated message
411: */
412: mqtt_msg_t *mqtt_msgDISCONNECT();
413: /*
414: * mqtt_msgPINGREQ() Create PINGREQ message
415: *
416: * return: NULL error or allocated message
417: */
418: mqtt_msg_t *mqtt_msgPINGREQ();
419: /*
420: * mqtt_msgPINGRESP() Create PINGRESP message
421: *
422: * return: NULL error or allocated message
423: */
424: mqtt_msg_t *mqtt_msgPINGRESP();
425:
426: /*
427: * mqtt_msgPUBLISH() Create PUBLISH message
428: *
429: * @csTopic = Publish topic
430: * @msgID = MessageID >0, if QOS != MQTT_QOS_ONCE
431: * @Dup = Duplicate message
432: * @QOS = QoS
433: * @Retain = Retain message
434: * @pData = Publish data into topic
435: * @datlen = Publish data length
436: * return: NULL error or allocated PUBLISH message
437: */
438: mqtt_msg_t *mqtt_msgPUBLISH(const char *csTopic, unsigned short msgID,
439: unsigned char Dup, unsigned char QOS,
440: unsigned char Retain, const void *pData, int datlen);
441: /*
442: * mqtt_msgPUBACK() Create PUBACK message
443: *
444: * @msgID = MessageID
445: * return: NULL error or allocated PUBACK message
446: */
447: mqtt_msg_t *mqtt_msgPUBACK(unsigned short msgID);
448: /*
449: * mqtt_msgPUBREC() Create PUBREC message
450: *
451: * @msgID = MessageID
452: * return: NULL error or allocated PUBREC message
453: */
454: mqtt_msg_t *mqtt_msgPUBREC(unsigned short msgID);
455: /*
456: * mqtt_msgPUBREL() Create PUBREL message
457: *
458: * @msgID = MessageID
459: * return: NULL error or allocated PUBREL message
460: */
461: mqtt_msg_t *mqtt_msgPUBREL(unsigned short msgID);
462: /*
463: * mqtt_msgPUBCOMP() Create PUBCOMP message
464: *
465: * @msgID = MessageID
466: * return: NULL error or allocated PUBCOMP message
467: */
468: mqtt_msg_t *mqtt_msgPUBCOMP(unsigned short msgID);
469:
470: /*
471: * mqtt_msgSUBSCRIBE() Create SUBSCRIBE message
472: *
473: * @Topics = MQTT subscription topics
474: * @msgID = MessageID
475: * return: NULL error or allocated SUBSCRIBE message
476: */
477: mqtt_msg_t *mqtt_msgSUBSCRIBE(mqtt_subscr_t * __restrict Topics, unsigned short msgID);
478: /*
479: * mqtt_msgSUBACK() Create SUBACK message
480: *
481: * @Topics = MQTT subscription topics
482: * @msgID = MessageID
483: * return: NULL error or allocated SUBACK message
484: */
485: mqtt_msg_t *mqtt_msgSUBACK(mqtt_subscr_t * __restrict Topics, unsigned short msgID);
486: /*
487: * mqtt_msgUNSUBSCRIBE() Create UNSUBSCRIBE message
488: *
489: * @Topics = MQTT subscription topics
490: * @msgID = MessageID
491: * @Dup = Duplicate message
492: * @QOS = QoS
493: * return: NULL error or allocated UNSUBSCRIBE message
494: */
495: mqtt_msg_t *mqtt_msgUNSUBSCRIBE(mqtt_subscr_t * __restrict Topics,
496: unsigned short msgID, unsigned char Dup, unsigned char QOS);
497: /*
498: * mqtt_msgUNSUBACK() Create UNSUBACK message
499: *
500: * @msgID = MessageID
501: * return: NULL error or allocated UNSUBACK message
502: */
503: mqtt_msg_t *mqtt_msgUNSUBACK(unsigned short msgID);
504:
505:
506: /*** RECEIVER FUNCTIONS ***/
507:
508: /*
509: * mqtt_readCONNECT() Read elements from CONNECT message
510: *
511: * @buf = Message buffer
512: * @KASec = Keep Alive in seconds for current connection
513: * @psConnID = ConnectID
514: * @connLen = ConnectID length
515: * @psUser = Username if !=NULL
516: * @userLen = Username length
517: * @psPass = Password for Username, only if csUser is set
518: * @passLen = Password length
519: * @psWillTopic = Will Topic if !=NULL Will Flags set into message and must be e_free()
520: * @psWillMessage = Will Message, may be NULL if !NULL must be e_free() after use!
521: * return: .reserved == 1 is error or == 0 connection flags & msg ok
522: */
523: mqtthdr_connack_t mqtt_readCONNECT(mqtt_msg_t * __restrict buf, unsigned short *KASec,
524: char * __restrict psConnID, int connLen,
525: char * __restrict psUser, int userLen, char * __restrict psPass, int passLen,
526: char ** __restrict psWillTopic, char ** __restrict psWillMessage);
527: /*
528: * mqtt_readCONNACK() Read CONNACK message
529: *
530: * @buf = Message buffer
531: * return: -1 error or >-1 CONNECT message return code
532: */
533: unsigned char mqtt_readCONNACK(mqtt_msg_t * __restrict buf);
534: /*
535: * mqtt_readDISCONNECT() Read DISCONNECT message
536: *
537: * @buf = Message buffer
538: * return: -1 error, 0 ok, >0 undefined result
539: */
540: int mqtt_readDISCONNECT(mqtt_msg_t * __restrict buf);
541: /*
542: * mqtt_readPINGREQ() Read PINGREQ message
543: *
544: * @buf = Message buffer
545: * return: -1 error, 0 ok, >0 undefined result
546: */
547: int mqtt_readPINGREQ(mqtt_msg_t * __restrict buf);
548: /*
549: * mqtt_readPINGRESP() Read PINGRESP message
550: *
551: * @buf = Message buffer
552: * return: -1 error, 0 ok, >0 undefined result
553: */
554: int mqtt_readPINGRESP(mqtt_msg_t * __restrict buf);
555:
556: /*
557: * mqtt_readPUBLISH() Read PUBLISH message
558: *
559: * @buf = Message buffer
560: * @psTopic = Topic
561: * @topicLen = Topic length
562: * @msgID = MessageID
563: * @pData = Data buffer, may be NULL
564: * return: -1 error or !=-1 allocated data buffer length
565: */
566: int mqtt_readPUBLISH(mqtt_msg_t * __restrict buf, char * __restrict psTopic,
567: int topicLen, unsigned short *msgID, void ** __restrict pData);
568: /*
569: * mqtt_readPUBACK() Read PUBACK message
570: *
571: * @buf = Message buffer
572: * return: -1 error or MessageID
573: */
574: unsigned short mqtt_readPUBACK(mqtt_msg_t * __restrict buf);
575: /*
576: * mqtt_readPUBREC() Read PUBREC message
577: *
578: * @buf = Message buffer
579: * return: -1 error or MessageID
580: */
581: unsigned short mqtt_readPUBREC(mqtt_msg_t * __restrict buf);
582: /*
583: * mqtt_readPUBREL() Read PUBREL message
584: *
585: * @buf = Message buffer
586: * return: -1 error or MessageID
587: */
588: unsigned short mqtt_readPUBREL(mqtt_msg_t * __restrict buf);
589: /*
590: * mqtt_readPUBCOMP() Read PUBCOMP message
591: *
592: * @buf = Message buffer
593: * return: -1 error or MessageID
594: */
595: unsigned short mqtt_readPUBCOMP(mqtt_msg_t * __restrict buf);
596:
597: /*
598: * mqtt_readSUBSCRIBE() Read SUBSCRIBE message
599: *
600: * @buf = Message buffer
601: * @msgID = MessageID
602: * @subscr = Subscriptions, must be free after use with mqtt_subFree()
603: * return: -1 error or >-1 elements into subscr
604: */
605: int mqtt_readSUBSCRIBE(mqtt_msg_t * __restrict buf, unsigned short *msgID,
606: mqtt_subscr_t **subscr);
607: /*
608: * mqtt_readSUBACK() Read SUBACK message
609: *
610: * @buf = Message buffer
611: * @msgID = MessageID
612: * @subqos = Subscribes QoS, must be free after use with e_free()
613: * return: -1 error or >-1 readed subscribes QoS elements
614: */
615: int mqtt_readSUBACK(mqtt_msg_t * __restrict buf, unsigned short *msgID, unsigned char **subqos);
616: /*
617: * mqtt_readUNSUBSCRIBE() Read UNSUBSCRIBE message
618: *
619: * @buf = Message buffer
620: * @msgID = MessageID
621: * @subscr = Subscriptions, must be free after use with mqtt_subFree()
622: * return: -1 error or >-1 elements into subscr
623: */
624: int mqtt_readUNSUBSCRIBE(mqtt_msg_t * __restrict buf, unsigned short *msgID,
625: mqtt_subscr_t **subscr);
626: /*
627: * mqtt_readUNSUBACK() Read UNSUBACK message
628: *
629: * @buf = Message buffer
630: * return: -1 error or MessageID
631: */
632: unsigned short mqtt_readUNSUBACK(mqtt_msg_t * __restrict buf);
633:
634:
635: #endif
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