1#ifndef HEADER_CURL_MQTT_H
2#define HEADER_CURL_MQTT_H
3/***************************************************************************
4 * _ _ ____ _
5 * Project ___| | | | _ \| |
6 * / __| | | | |_) | |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 2019 - 2020, Björn Stenberg, <bjorn@haxx.se>
11 *
12 * This software is licensed as described in the file COPYING, which
13 * you should have received as part of this distribution. The terms
14 * are also available at https://curl.se/docs/copyright.html.
15 *
16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17 * copies of the Software, and permit persons to whom the Software is
18 * furnished to do so, under the terms of the COPYING file.
19 *
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
22 *
23 ***************************************************************************/
24
25#ifndef CURL_DISABLE_MQTT
26extern const struct Curl_handler Curl_handler_mqtt;
27#endif
28
29enum mqttstate {
30 MQTT_FIRST, /* 0 */
31 MQTT_REMAINING_LENGTH, /* 1 */
32 MQTT_CONNACK, /* 2 */
33 MQTT_SUBACK, /* 3 */
34 MQTT_SUBACK_COMING, /* 4 - the SUBACK remainder */
35 MQTT_PUBWAIT, /* 5 - wait for publish */
36 MQTT_PUB_REMAIN, /* 6 - wait for the remainder of the publish */
37
38 MQTT_NOSTATE /* 7 - never used an actual state */
39};
40
41struct mqtt_conn {
42 enum mqttstate state;
43 enum mqttstate nextstate; /* switch to this after remaining length is
44 done */
45 unsigned int packetid;
46};
47
48/* protocol-specific transfer-related data */
49struct MQTT {
50 char *sendleftovers;
51 size_t nsend; /* size of sendleftovers */
52
53 /* when receiving */
54 size_t npacket; /* byte counter */
55 unsigned char firstbyte;
56 size_t remaining_length;
57};
58
59#endif /* HEADER_CURL_MQTT_H */
60