155 lines
4.1 KiB
C
155 lines
4.1 KiB
C
/* wolfmqtt_stub.c
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*
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* Copyright (C) 2006-2024 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL 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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* wolfSSL 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 02110-1301, USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <time.h>
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#include <wolfssl/ssl.h>
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#include "wolfmqtt_stub.h"
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/* MQTT client context */
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static MqttClientContext mqttCtx;
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/* Initialize MQTT client */
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int mqtt_client_init(void)
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{
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printf("Initializing MQTT client (stub implementation)\n");
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/* Initialize context */
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memset(&mqttCtx, 0, sizeof(MqttClientContext));
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/* Allocate buffers */
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mqttCtx.tx_buf = (unsigned char*)malloc(MAX_BUFFER_SIZE);
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mqttCtx.rx_buf = (unsigned char*)malloc(MAX_BUFFER_SIZE);
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if (mqttCtx.tx_buf == NULL || mqttCtx.rx_buf == NULL) {
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printf("Failed to allocate buffers\n");
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mqtt_client_cleanup();
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return -1;
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}
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/* Connect to broker */
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printf("Connecting to MQTT broker %s:%d\n", MQTT_HOST, MQTT_PORT);
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/* Create TLS connection */
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printf("Creating TLS connection\n");
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/* Initialize wolfSSL */
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if (wolfSSL_Init() != WOLFSSL_SUCCESS) {
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printf("Failed to initialize wolfSSL\n");
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return -1;
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}
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/* Create and initialize WOLFSSL_CTX */
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WOLFSSL_CTX* ctx = wolfSSL_CTX_new(wolfTLSv1_3_client_method());
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if (ctx == NULL) {
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printf("Failed to create WOLFSSL_CTX\n");
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return -1;
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}
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/* Load CA certificate */
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if (wolfSSL_CTX_load_verify_locations(ctx, MQTT_TLS_CA_CERT, NULL) != WOLFSSL_SUCCESS) {
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printf("Failed to load CA certificate: %s\n", MQTT_TLS_CA_CERT);
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wolfSSL_CTX_free(ctx);
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return -1;
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}
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/* Load client certificate */
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if (wolfSSL_CTX_use_certificate_file(ctx, MQTT_TLS_CLIENT_CERT, WOLFSSL_FILETYPE_PEM) != WOLFSSL_SUCCESS) {
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printf("Failed to load client certificate: %s\n", MQTT_TLS_CLIENT_CERT);
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wolfSSL_CTX_free(ctx);
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return -1;
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}
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/* Load client key */
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if (wolfSSL_CTX_use_PrivateKey_file(ctx, MQTT_TLS_CLIENT_KEY, WOLFSSL_FILETYPE_PEM) != WOLFSSL_SUCCESS) {
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printf("Failed to load client key: %s\n", MQTT_TLS_CLIENT_KEY);
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wolfSSL_CTX_free(ctx);
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return -1;
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}
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/* Store context */
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mqttCtx.ssl_ctx = ctx;
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/* Subscribe to topic */
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printf("Subscribing to topic: %s\n", MQTT_TOPIC);
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/* Publish test message */
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printf("Publishing test message to topic: %s\n", MQTT_TOPIC);
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return 0;
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}
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/* Cleanup MQTT client */
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int mqtt_client_cleanup(void)
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{
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printf("Cleaning up MQTT client (stub implementation)\n");
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/* Free SSL context */
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if (mqttCtx.ssl_ctx) {
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wolfSSL_CTX_free(mqttCtx.ssl_ctx);
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mqttCtx.ssl_ctx = NULL;
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}
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/* Free buffers */
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if (mqttCtx.tx_buf) {
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free(mqttCtx.tx_buf);
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mqttCtx.tx_buf = NULL;
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}
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if (mqttCtx.rx_buf) {
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free(mqttCtx.rx_buf);
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mqttCtx.rx_buf = NULL;
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}
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/* Cleanup wolfSSL */
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wolfSSL_Cleanup();
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return 0;
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}
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/* Get MQTT client context */
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MqttClientContext* mqtt_client_get_context(void)
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{
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return &mqttCtx;
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}
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/* Process MQTT messages */
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int mqtt_client_process_message(void)
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{
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printf("Processing MQTT messages (stub implementation)\n");
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/* Simulate message processing */
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sleep(1);
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return 0;
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}
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/* Send MQTT ping */
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int mqtt_client_ping(void)
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{
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printf("Sending MQTT ping (stub implementation)\n");
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return 0;
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}
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