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: mqttapi.h,v 1.3 2012/06/29 13:54:48 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, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
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 __MQTTAPI_H
47: #define __MQTTAPI_H
48:
49:
50: #include "aitmqtt.h"
51:
52:
53: #ifdef API_SERVER_SIDE
54: /* MQTT server structure & hooks */
55:
56: /* MQTT command callback. 1st argument is (mqtt_srv_t*) server handle, 2nd is ready length */
57: typedef int (*mqtt_cb_t)(void* /*mqtt_srv_t**/, int, void *);
58: typedef struct {
59: mqtt_cb_t cmds[MQTT_TYPE_MAX];
60:
61: int sock;
62: unsigned short timeout;
63: mqtt_msg_t *buf;
64: } mqtt_srv_t;
65: #define mqtt_srv_setCmd(x, _cmd, _func) (assert((x)), (x)->cmds[(_cmd)] = (_func))
66: #define mqtt_srv_getCmd(x, _cmd) (assert((x)), (x)->cmds[(_cmd)])
67:
68:
69: /*
70: * mqtt_srv_cliInit() Init MQTT server side support for clients
71: *
72: * @sock = Client socket from accept()
73: * @buf = Message buffer
74: * @timeout = timeout
75: * @nb = Non block socket
76: * return: NULL error or !=NULL allocated server handle
77: */
78: mqtt_srv_t *mqtt_srv_cliInit(int sock, mqtt_msg_t * __restrict buf,
79: unsigned short timeout, int nb);
80: /*
81: * mqtt_srv_Fini() Finish MQTT server side support for clients
82: *
83: * @psrv = Server handle
84: * return: none
85: */
86: void mqtt_srv_cliFini(mqtt_srv_t ** __restrict psrv);
87: /*
88: * mqtt_srv_Dispatch() MQTT server dispatcher for clients
89: *
90: * @srv = Server handle
91: * @rlen = Ready bytes to parse
92: * @arg = Argument pass to command callback
93: * return: -1 error or 0 ok
94: */
95: int mqtt_srv_cliDispatch(mqtt_srv_t * __restrict srv, int rlen, void *arg);
96:
97: /*
98: * mqtt_srv_Create() - Create server socket
99: *
100: * @sa = Server bind address
101: * @salen = Server struct sockaddr size
102: * return: -1 error or >-1 server socket
103: */
104: int mqtt_srv_Create(struct sockaddr * __restrict sa, int salen);
105: /*
106: * mqtt_srv_Destroy() - Close server socket
107: *
108: * @sock = Server socket
109: * return: -1 error or 0 ok
110: */
111: int mqtt_srv_Destroy(int sock);
112: /*
113: * mqtt_srv_Listen() - Listen server socket
114: *
115: * @sock = Server socket
116: * @maxconn = max number of pending connections
117: * @nb = Non block socket
118: * return: -1 error or 0 ok
119: */
120: int mqtt_srv_Listen(int sock, int maxconn, int nb);
121: #endif
122:
123: /*
124: * mqtt_KeepAlive() - Keep Alive check routine
125: *
126: * @sock = connected socket
127: * @ka = keep alive timeout
128: * @tries = tries for receive correct ping response, usually ==1
129: * return: -1 error, 0 host is alive, 1 timeout session or 2 broken session
130: */
131: int mqtt_KeepAlive(int sock, unsigned short ka, unsigned char tries);
132:
133:
134: #ifdef API_CLIENT_SIDE
135: /* MQTT client structure */
136:
137: typedef struct {
138: int sock;
139: unsigned short timeout;
140: mqtt_msg_t *buf;
141: } mqtt_cli_t;
142:
143:
144: /*
145: * mqtt_cli_Open() - Open client connection to MQTT broker
146: *
147: * @addr = brokers address
148: * @timeout = timeout
149: * return: NULL error or !=NULL connected to broker
150: */
151: mqtt_cli_t *mqtt_cli_Open(struct sockaddr *addr, unsigned short timeout);
152: /*
153: * mqtt_cli_Close() - Close client connection
154: *
155: * @cli = connected client
156: * return: -1 error or 0 disconnected client and freed all resources
157: */
158: int mqtt_cli_Close(mqtt_cli_t ** __restrict cli);
159:
160: /*
161: * mqtt_cli_Subscribe() - Subscribe to broker
162: *
163: * @cli = connected client
164: * @Topics = Topics for subscribes
165: * @msgID = Message ID
166: * @Dup = Duplicated request
167: * @QoS = Message QoS
168: * return: NULL error or !=NULL allocated array with subscribed QoS responses,
169: * must be free() result!
170: */
171: unsigned char *mqtt_cli_Subscribe(mqtt_cli_t * __restrict cli,
172: mqtt_subscr_t * __restrict Topics, unsigned short msgID,
173: unsigned char Dup, unsigned char QoS);
174: /*
175: * mqtt_cli_Unsubscribe() - Unsubscribe from broker
176: *
177: * @cli = connected client
178: * @Topics = Topics for unsubscribes
179: * @msgID = Message ID
180: * @Dup = Duplicated request
181: * @QoS = Message QoS
182: * return: -1 error or 0 ok
183: */
184: int mqtt_cli_Unsubscribe(mqtt_cli_t * __restrict cli,
185: mqtt_subscr_t * __restrict Topics, unsigned short msgID,
186: unsigned char Dup, unsigned char QoS);
187: /*
188: * mqtt_cli_Publish() - Publish message to broker
189: *
190: * @cli = connected client
191: * @msgID = Message ID
192: * @Dup = Duplicated request
193: * @QoS = Message QoS
194: * @Retain = Retain message
195: * @csTopic = Topic
196: * @pData = Data
197: * @datLen = Data length
198: * return: -1 error or > -1 sended bytes
199: */
200: int mqtt_cli_Publish(mqtt_cli_t * __restrict cli, unsigned short msgID,
201: unsigned char Dup, unsigned char QoS, unsigned char Retain,
202: const char *csTopic, const void *pData, int datLen);
203: #endif
204:
205:
206: #endif
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