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