1#ifndef HEADER_CURL_MQTT_H
2#define HEADER_CURL_MQTT_H
3/***************************************************************************
4 * _ _ ____ _
5 * Project ___| | | | _ \| |
6 * / __| | | | |_) | |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 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 * SPDX-License-Identifier: curl
24 *
25 ***************************************************************************/
26
27#ifndef CURL_DISABLE_MQTT
28extern const struct Curl_handler Curl_handler_mqtt;
29#endif
30
31enum mqttstate {
32 MQTT_FIRST, /* 0 */
33 MQTT_REMAINING_LENGTH, /* 1 */
34 MQTT_CONNACK, /* 2 */
35 MQTT_SUBACK, /* 3 */
36 MQTT_SUBACK_COMING, /* 4 - the SUBACK remainder */
37 MQTT_PUBWAIT, /* 5 - wait for publish */
38 MQTT_PUB_REMAIN, /* 6 - wait for the remainder of the publish */
39
40 MQTT_NOSTATE /* 7 - never used an actual state */
41};
42
43struct mqtt_conn {
44 enum mqttstate state;
45 enum mqttstate nextstate; /* switch to this after remaining length is
46 done */
47 unsigned int packetid;
48};
49
50/* protocol-specific transfer-related data */
51struct MQTT {
52 char *sendleftovers;
53 size_t nsend; /* size of sendleftovers */
54
55 /* when receiving */
56 size_t npacket; /* byte counter */
57 unsigned char firstbyte;
58 size_t remaining_length;
59 struct dynbuf recvbuf;
60};
61
62#endif /* HEADER_CURL_MQTT_H */
63