Annotation of libaitmqtt/inc/mqttapi.h, revision 1.4
1.2 misho 1: /*************************************************************************
2: * (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
1.4 ! misho 6: * $Id: mqttapi.h,v 1.3.2.1 2012/06/29 15:23:10 misho Exp $
1.2 misho 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: /*
1.3 misho 70: * mqtt_srv_cliInit() Init MQTT server side support for clients
1.2 misho 71: *
72: * @sock = Client socket from accept()
73: * @buf = Message buffer
74: * @timeout = timeout
1.3 misho 75: * @nb = Non block socket
1.2 misho 76: * return: NULL error or !=NULL allocated server handle
77: */
1.3 misho 78: mqtt_srv_t *mqtt_srv_cliInit(int sock, mqtt_msg_t * __restrict buf,
79: unsigned short timeout, int nb);
1.2 misho 80: /*
1.3 misho 81: * mqtt_srv_Fini() Finish MQTT server side support for clients
1.2 misho 82: *
83: * @psrv = Server handle
84: * return: none
85: */
1.3 misho 86: void mqtt_srv_cliFini(mqtt_srv_t ** __restrict psrv);
1.2 misho 87: /*
1.3 misho 88: * mqtt_srv_Dispatch() MQTT server dispatcher for clients
1.2 misho 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: */
1.3 misho 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);
1.2 misho 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);
1.4 ! misho 132: /*
! 133: * mqtt_WillMessage() - Publish WILL message
! 134: *
! 135: * @sock = connected socket
! 136: * @ka = keep alive timeout
! 137: * @topic = will topic
! 138: * @data = will message
! 139: * return: -1 error, 1 timeout, 2 not ack or 0 ok
! 140: */
! 141: int mqtt_WillMessage(int sock, unsigned short ka, const char *topic, const char *data);
1.2 misho 142:
143:
144: #ifdef API_CLIENT_SIDE
145: /* MQTT client structure */
146:
147: typedef struct {
148: int sock;
149: unsigned short timeout;
150: mqtt_msg_t *buf;
151: } mqtt_cli_t;
152:
153:
154: /*
155: * mqtt_cli_Open() - Open client connection to MQTT broker
156: *
157: * @addr = brokers address
158: * @timeout = timeout
159: * return: NULL error or !=NULL connected to broker
160: */
161: mqtt_cli_t *mqtt_cli_Open(struct sockaddr *addr, unsigned short timeout);
162: /*
163: * mqtt_cli_Close() - Close client connection
164: *
165: * @cli = connected client
166: * return: -1 error or 0 disconnected client and freed all resources
167: */
168: int mqtt_cli_Close(mqtt_cli_t ** __restrict cli);
169:
170: /*
171: * mqtt_cli_Subscribe() - Subscribe to broker
172: *
173: * @cli = connected client
174: * @Topics = Topics for subscribes
175: * @msgID = Message ID
176: * @Dup = Duplicated request
177: * @QoS = Message QoS
178: * return: NULL error or !=NULL allocated array with subscribed QoS responses,
179: * must be free() result!
180: */
181: unsigned char *mqtt_cli_Subscribe(mqtt_cli_t * __restrict cli,
182: mqtt_subscr_t * __restrict Topics, unsigned short msgID,
183: unsigned char Dup, unsigned char QoS);
184: /*
185: * mqtt_cli_Unsubscribe() - Unsubscribe from broker
186: *
187: * @cli = connected client
188: * @Topics = Topics for unsubscribes
189: * @msgID = Message ID
190: * @Dup = Duplicated request
191: * @QoS = Message QoS
192: * return: -1 error or 0 ok
193: */
194: int mqtt_cli_Unsubscribe(mqtt_cli_t * __restrict cli,
195: mqtt_subscr_t * __restrict Topics, unsigned short msgID,
196: unsigned char Dup, unsigned char QoS);
197: /*
198: * mqtt_cli_Publish() - Publish message to broker
199: *
200: * @cli = connected client
201: * @msgID = Message ID
202: * @Dup = Duplicated request
203: * @QoS = Message QoS
204: * @Retain = Retain message
205: * @csTopic = Topic
206: * @pData = Data
207: * @datLen = Data length
208: * return: -1 error or > -1 sended bytes
209: */
210: int mqtt_cli_Publish(mqtt_cli_t * __restrict cli, unsigned short msgID,
211: unsigned char Dup, unsigned char QoS, unsigned char Retain,
212: const char *csTopic, const void *pData, int datLen);
213: #endif
214:
215:
216: #endif
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