132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/* mqtt_socket.h
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*
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* Copyright (C) 2006-2020 wolfSSL Inc.
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*
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* This file is part of wolfMQTT.
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*
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* wolfMQTT is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfMQTT is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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/* Implementation by: David Garske
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* Based on specification for MQTT v3.1.1
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* See http://mqtt.org/documentation for additional MQTT documentation.
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*/
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#ifndef WOLFMQTT_SOCKET_H
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#define WOLFMQTT_SOCKET_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "wolfmqtt/mqtt_packet.h"
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#include "wolfmqtt/mqtt_types.h"
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#ifdef ENABLE_MQTT_TLS
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#ifndef WOLF_TLS_DHKEY_BITS_MIN /* allow define to be overridden */
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#ifdef WOLFSSL_MAX_STRENGTH
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#define WOLF_TLS_DHKEY_BITS_MIN 2048
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#else
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#define WOLF_TLS_DHKEY_BITS_MIN 1024
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#endif
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#endif
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#endif
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/* Default Port Numbers */
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#define MQTT_DEFAULT_PORT 1883
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#define MQTT_SECURE_PORT 8883
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struct _MqttClient;
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/* Function callbacks */
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typedef int (*MqttTlsCb)(struct _MqttClient *client);
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typedef int (*MqttNetConnectCb)(void *context,
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const char *host, word16 port, int timeout_ms);
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typedef int (*MqttNetWriteCb)(void *context,
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const byte *buf, int buf_len, int timeout_ms);
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typedef int (*MqttNetReadCb)(void *context,
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byte *buf, int buf_len, int timeout_ms);
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#ifdef WOLFMQTT_SN
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typedef int (*MqttNetPeekCb)(void *context,
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byte *buf, int buf_len, int timeout_ms);
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#endif
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typedef int (*MqttNetDisconnectCb)(void *context);
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/* Structure for Network Security */
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#ifdef ENABLE_MQTT_TLS
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typedef struct _MqttTls {
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WOLFSSL_CTX *ctx;
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WOLFSSL *ssl;
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int sockRc;
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int timeout_ms;
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} MqttTls;
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#endif
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/* Structure for Network callbacks */
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typedef struct _MqttNet {
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void *context;
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MqttNetConnectCb mqtt_connect;
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MqttNetReadCb mqtt_read;
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MqttNetWriteCb mqtt_write;
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MqttNetDisconnectCb disconnect;
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const char *host;
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word16 port;
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int use_tls;
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const char *root_ca;
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const char *device_cert;
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const char *device_priv_key;
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int ca_len;
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int cert_len;
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int key_len;
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#ifdef WOLFMQTT_SN
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MqttNetPeekCb mqtt_peek;
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void *multi_ctx;
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#endif
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} MqttNet;
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/* MQTT SOCKET APPLICATION INTERFACE */
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WOLFMQTT_LOCAL int MqttSocket_Init(struct _MqttClient *client, MqttNet *net);
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WOLFMQTT_LOCAL int MqttSocket_Write(struct _MqttClient *client, const byte *buf,
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int buf_len, int timeout_ms);
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WOLFMQTT_LOCAL int MqttSocket_Read(struct _MqttClient *client, byte *buf,
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int buf_len, int timeout_ms);
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#ifdef WOLFMQTT_SN
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WOLFMQTT_LOCAL int MqttSocket_Peek(struct _MqttClient *client, byte *buf,
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int buf_len, int timeout_ms);
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#endif
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WOLFMQTT_LOCAL int MqttSocket_Connect(struct _MqttClient *client,
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const char *host, word16 port, int timeout_ms, int use_tls,
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MqttTlsCb cb);
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WOLFMQTT_LOCAL int MqttSocket_Disconnect(struct _MqttClient *client);
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#ifdef ENABLE_MQTT_TLS
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int MqttSocket_TlsSocketReceive(WOLFSSL *ssl, char *buf, int sz, void *ptr);
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int MqttSocket_TlsSocketSend(WOLFSSL *ssl, char *buf, int sz, void *ptr);
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#endif
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* WOLFMQTT_SOCKET_H */
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