| 1 | #ifndef HEADER_CURL_MQTT_H
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| 2 | #define HEADER_CURL_MQTT_H
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| 3 | /***************************************************************************
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| 4 | * _ _ ____ _
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| 5 | * Project ___| | | | _ \| |
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| 6 | * / __| | | | |_) | |
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| 7 | * | (__| |_| | _ <| |___
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| 8 | * \___|\___/|_| \_\_____|
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| 9 | *
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| 10 | * Copyright (C) 2019 - 2022, Björn Stenberg, <[email protected]>
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| 11 | *
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| 12 | * This software is licensed as described in the file COPYING, which
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| 13 | * you should have received as part of this distribution. The terms
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| 14 | * are also available at https://curl.se/docs/copyright.html.
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| 15 | *
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| 16 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 17 | * copies of the Software, and permit persons to whom the Software is
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| 18 | * furnished to do so, under the terms of the COPYING file.
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| 19 | *
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| 20 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 21 | * KIND, either express or implied.
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| 22 | *
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| 23 | * SPDX-License-Identifier: curl
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| 24 | *
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| 25 | ***************************************************************************/
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| 26 |
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| 27 | #ifndef CURL_DISABLE_MQTT
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| 28 | extern const struct Curl_handler Curl_handler_mqtt;
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| 29 | #endif
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| 30 |
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| 31 | enum mqttstate {
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| 32 | MQTT_FIRST, /* 0 */
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| 33 | MQTT_REMAINING_LENGTH, /* 1 */
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| 34 | MQTT_CONNACK, /* 2 */
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| 35 | MQTT_SUBACK, /* 3 */
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| 36 | MQTT_SUBACK_COMING, /* 4 - the SUBACK remainder */
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| 37 | MQTT_PUBWAIT, /* 5 - wait for publish */
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| 38 | MQTT_PUB_REMAIN, /* 6 - wait for the remainder of the publish */
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| 39 |
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| 40 | MQTT_NOSTATE /* 7 - never used an actual state */
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| 41 | };
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| 42 |
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| 43 | struct mqtt_conn {
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| 44 | enum mqttstate state;
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| 45 | enum mqttstate nextstate; /* switch to this after remaining length is
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| 46 | done */
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| 47 | unsigned int packetid;
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| 48 | };
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| 49 |
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| 50 | /* protocol-specific transfer-related data */
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| 51 | struct MQTT {
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| 52 | char *sendleftovers;
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| 53 | size_t nsend; /* size of sendleftovers */
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| 54 |
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| 55 | /* when receiving */
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| 56 | size_t npacket; /* byte counter */
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| 57 | unsigned char firstbyte;
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| 58 | size_t remaining_length;
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| 59 | };
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| 60 |
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| 61 | #endif /* HEADER_CURL_MQTT_H */
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