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#ifndef HEADER_CURL_MQTT_H
#define HEADER_CURL_MQTT_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Björn Stenberg, <bjorn@haxx.se>
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#ifndef CURL_DISABLE_MQTT
extern const struct Curl_handler Curl_handler_mqtt;
#endif
enum mqttstate {
MQTT_FIRST, /* 0 */
MQTT_REMAINING_LENGTH, /* 1 */
MQTT_CONNACK, /* 2 */
MQTT_SUBACK, /* 3 */
MQTT_SUBACK_COMING, /* 4 - the SUBACK remainder */
MQTT_PUBWAIT, /* 5 - wait for publish */
MQTT_PUB_REMAIN, /* 6 - wait for the remainder of the publish */
MQTT_NOSTATE /* 7 - never used an actual state */
};
struct mqtt_conn {
enum mqttstate state;
enum mqttstate nextstate; /* switch to this after remaining length is
done */
unsigned int packetid;
};
/* protocol-specific transfer-related data */
struct MQTT {
char *sendleftovers;
size_t nsend; /* size of sendleftovers */
/* when receiving */
size_t npacket; /* byte counter */
unsigned char firstbyte;
size_t remaining_length;
struct dynbuf recvbuf;
unsigned char pkt_hd[4]; /* for decoding the arriving packet length */
};
#endif /* HEADER_CURL_MQTT_H */
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