WolfSSL
/
wolfMQTT
mirror of https://github.com/wolfSSL/wolfMQTT.git
1
0
Fork 0
Code Issues Releases Wiki Activity
wolfMQTT/examples/pub-sub/mqtt-pub.c

536 lines
17 KiB
C
Raw Blame History

/* mqtt-pub.c
*
* Copyright (C) 2006-2026 wolfSSL Inc.
*
* This file is part of wolfMQTT.
*
* wolfMQTT is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* wolfMQTT is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
/* Include the autoconf generated config.h */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "examples/mqttnet.h"
#include "examples/pub-sub/mqtt-pub-sub.h"
/* Configuration */
/* Maximum size for network read/write callbacks. There is also a v5 define that
* describes the max MQTT control packet size, DEFAULT_MAX_PKT_SZ. */
#ifndef MAX_BUFFER_SIZE
#define MAX_BUFFER_SIZE 1024
#endif
#ifdef WOLFMQTT_PROPERTY_CB
#define MAX_CLIENT_ID_LEN 64
char gClientId[MAX_CLIENT_ID_LEN] = {0};
#endif
#ifdef WOLFMQTT_DISCONNECT_CB
/* callback indicates a network error occurred */
static int mqtt_disconnect_cb(MqttClient* client, int error_code, void* ctx)
{
(void)client;
(void)ctx;
PRINTF("Network Error Callback: %s (error %d)",
MqttClient_ReturnCodeToString(error_code), error_code);
return 0;
}
#endif
#ifdef WOLFMQTT_PROPERTY_CB
/* The property callback is called after decoding a packet that contains at
least one property. The property list is deallocated after returning from
the callback. */
static int mqtt_property_cb(MqttClient *client, MqttProp *head, void *ctx)
{
MqttProp *prop = head;
int rc = 0;
MQTTCtx* mqttCtx;
if ((client == NULL) || (client->ctx == NULL)) {
return MQTT_CODE_ERROR_BAD_ARG;
}
mqttCtx = (MQTTCtx*)client->ctx;
while (prop != NULL) {
PRINTF("Property CB: Type %d", prop->type);
switch (prop->type) {
case MQTT_PROP_ASSIGNED_CLIENT_ID:
/* Store client ID in global */
mqttCtx->client_id = &gClientId[0];
/* Store assigned client ID from CONNACK*/
XSTRNCPY((char*)mqttCtx->client_id, prop->data_str.str,
MAX_CLIENT_ID_LEN - 1);
/* should use strlcpy() semantics, but non-portable */
((char*)mqttCtx->client_id)[MAX_CLIENT_ID_LEN - 1] = '\0';
break;
case MQTT_PROP_SUBSCRIPTION_ID_AVAIL:
mqttCtx->subId_not_avail =
prop->data_byte == 0;
break;
case MQTT_PROP_TOPIC_ALIAS_MAX:
mqttCtx->topic_alias_max =
(mqttCtx->topic_alias_max < prop->data_short) ?
mqttCtx->topic_alias_max : prop->data_short;
break;
case MQTT_PROP_MAX_PACKET_SZ:
if ((prop->data_int > 0) &&
(prop->data_int <= MQTT_PACKET_SZ_MAX))
{
client->packet_sz_max =
(client->packet_sz_max < prop->data_int) ?
client->packet_sz_max : prop->data_int;
}
else {
/* Protocol error */
rc = MQTT_CODE_ERROR_PROPERTY;
}
break;
case MQTT_PROP_SERVER_KEEP_ALIVE:
mqttCtx->keep_alive_sec = prop->data_short;
break;
case MQTT_PROP_MAX_QOS:
client->max_qos = prop->data_byte;
break;
case MQTT_PROP_RETAIN_AVAIL:
client->retain_avail = prop->data_byte;
break;
case MQTT_PROP_REASON_STR:
PRINTF("Reason String: %.*s",
prop->data_str.len, prop->data_str.str);
break;
case MQTT_PROP_USER_PROP:
PRINTF("User property: key=\"%.*s\", value=\"%.*s\"",
prop->data_str.len, prop->data_str.str,
prop->data_str2.len, prop->data_str2.str);
break;
case MQTT_PROP_PAYLOAD_FORMAT_IND:
case MQTT_PROP_MSG_EXPIRY_INTERVAL:
case MQTT_PROP_CONTENT_TYPE:
case MQTT_PROP_RESP_TOPIC:
case MQTT_PROP_CORRELATION_DATA:
case MQTT_PROP_SUBSCRIPTION_ID:
case MQTT_PROP_SESSION_EXPIRY_INTERVAL:
case MQTT_PROP_TOPIC_ALIAS:
case MQTT_PROP_TYPE_MAX:
case MQTT_PROP_RECEIVE_MAX:
case MQTT_PROP_WILDCARD_SUB_AVAIL:
case MQTT_PROP_SHARED_SUBSCRIPTION_AVAIL:
case MQTT_PROP_RESP_INFO:
case MQTT_PROP_SERVER_REF:
case MQTT_PROP_AUTH_METHOD:
case MQTT_PROP_AUTH_DATA:
case MQTT_PROP_NONE:
break;
case MQTT_PROP_REQ_PROB_INFO:
case MQTT_PROP_WILL_DELAY_INTERVAL:
case MQTT_PROP_REQ_RESP_INFO:
default:
/* Invalid */
rc = MQTT_CODE_ERROR_PROPERTY;
break;
}
prop = prop->next;
}
(void)ctx;
return rc;
}
#endif /* WOLFMQTT_PROPERTY_CB */
int pub_client(MQTTCtx *mqttCtx)
{
int rc = MQTT_CODE_SUCCESS;
/* Initialize Network */
rc = MqttClientNet_Init(&mqttCtx->net, mqttCtx);
if (mqttCtx->debug_on) {
PRINTF("MQTT Net Init: %s (%d)",
MqttClient_ReturnCodeToString(rc), rc);
}
if (rc != MQTT_CODE_SUCCESS) {
goto exit;
}
/* setup tx/rx buffers */
mqttCtx->tx_buf = (byte*)WOLFMQTT_MALLOC(MAX_BUFFER_SIZE);
mqttCtx->rx_buf = (byte*)WOLFMQTT_MALLOC(MAX_BUFFER_SIZE);
/* Initialize MqttClient structure */
rc = MqttClient_Init(&mqttCtx->client, &mqttCtx->net,
NULL,
mqttCtx->tx_buf, MAX_BUFFER_SIZE,
mqttCtx->rx_buf, MAX_BUFFER_SIZE,
mqttCtx->cmd_timeout_ms);
if (mqttCtx->debug_on) {
PRINTF("MQTT Init: %s (%d)",
MqttClient_ReturnCodeToString(rc), rc);
}
if (rc != MQTT_CODE_SUCCESS) {
goto exit;
}
/* The client.ctx will be stored in the cert callback ctx during
MqttSocket_Connect for use by mqtt_tls_verify_cb */
mqttCtx->client.ctx = mqttCtx;
#ifdef WOLFMQTT_DISCONNECT_CB
/* setup disconnect callback */
rc = MqttClient_SetDisconnectCallback(&mqttCtx->client,
mqtt_disconnect_cb, NULL);
if (rc != MQTT_CODE_SUCCESS) {
goto exit;
}
#endif
#ifdef WOLFMQTT_PROPERTY_CB
rc = MqttClient_SetPropertyCallback(&mqttCtx->client,
mqtt_property_cb, NULL);
if (rc != MQTT_CODE_SUCCESS) {
goto exit;
}
#endif
/* Connect to broker */
rc = MqttClient_NetConnect(&mqttCtx->client, mqttCtx->host,
mqttCtx->port,
DEFAULT_CON_TIMEOUT_MS, mqttCtx->use_tls, mqtt_tls_cb);
if (mqttCtx->debug_on) {
PRINTF("MQTT Socket Connect: %s (%d)",
MqttClient_ReturnCodeToString(rc), rc);
}
if (rc != MQTT_CODE_SUCCESS) {
goto exit;
}
/* Build connect packet */
XMEMSET(&mqttCtx->connect, 0, sizeof(MqttConnect));
mqttCtx->connect.keep_alive_sec = mqttCtx->keep_alive_sec;
mqttCtx->connect.clean_session = mqttCtx->clean_session;
mqttCtx->connect.client_id = mqttCtx->client_id;
/* Last will and testament sent by broker to subscribers
of topic when broker connection is lost */
XMEMSET(&mqttCtx->lwt_msg, 0, sizeof(mqttCtx->lwt_msg));
mqttCtx->connect.lwt_msg = &mqttCtx->lwt_msg;
mqttCtx->connect.enable_lwt = mqttCtx->enable_lwt;
if (mqttCtx->enable_lwt) {
/* Send client id in LWT payload */
mqttCtx->lwt_msg.qos = mqttCtx->qos;
mqttCtx->lwt_msg.retain = 0;
mqttCtx->lwt_msg.topic_name = WOLFMQTT_TOPIC_NAME"lwttopic";
mqttCtx->lwt_msg.buffer = (byte*)mqttCtx->client_id;
mqttCtx->lwt_msg.total_len = (word16)XSTRLEN(mqttCtx->client_id);
#ifdef WOLFMQTT_V5
{
/* Add a 5 second delay to sending the LWT */
MqttProp* prop = MqttClient_PropsAdd(&mqttCtx->lwt_msg.props);
prop->type = MQTT_PROP_WILL_DELAY_INTERVAL;
prop->data_int = 5;
}
#endif
}
/* Optional authentication */
mqttCtx->connect.username = mqttCtx->username;
mqttCtx->connect.password = mqttCtx->password;
#ifdef WOLFMQTT_V5
mqttCtx->client.packet_sz_max = mqttCtx->max_packet_size;
mqttCtx->client.enable_eauth = mqttCtx->enable_eauth;
if (mqttCtx->client.enable_eauth == 1) {
/* Enhanced authentication */
/* Add property: Authentication Method */
MqttProp* prop = MqttClient_PropsAdd(&mqttCtx->connect.props);
prop->type = MQTT_PROP_AUTH_METHOD;
prop->data_str.str = (char*)DEFAULT_AUTH_METHOD;
prop->data_str.len = (word16)XSTRLEN(prop->data_str.str);
}
{
/* Request Response Information */
MqttProp* prop = MqttClient_PropsAdd(&mqttCtx->connect.props);
prop->type = MQTT_PROP_REQ_RESP_INFO;
prop->data_byte = 1;
}
{
/* Request Problem Information */
MqttProp* prop = MqttClient_PropsAdd(&mqttCtx->connect.props);
prop->type = MQTT_PROP_REQ_PROB_INFO;
prop->data_byte = 1;
}
{
/* Maximum Packet Size */
MqttProp* prop = MqttClient_PropsAdd(&mqttCtx->connect.props);
prop->type = MQTT_PROP_MAX_PACKET_SZ;
prop->data_int = (word32)mqttCtx->max_packet_size;
}
{
/* Topic Alias Maximum */
MqttProp* prop = MqttClient_PropsAdd(&mqttCtx->connect.props);
prop->type = MQTT_PROP_TOPIC_ALIAS_MAX;
prop->data_short = mqttCtx->topic_alias_max;
}
if (mqttCtx->clean_session == 0) {
/* Session expiry interval */
MqttProp* prop = MqttClient_PropsAdd(&mqttCtx->connect.props);
prop->type = MQTT_PROP_SESSION_EXPIRY_INTERVAL;
prop->data_int = DEFAULT_SESS_EXP_INT; /* Session does not expire */
}
#endif
/* Send Connect and wait for Connect Ack */
rc = MqttClient_Connect(&mqttCtx->client, &mqttCtx->connect);
if (mqttCtx->debug_on) {
PRINTF("MQTT Connect: Proto (%s), %s (%d)",
MqttClient_GetProtocolVersionString(&mqttCtx->client),
MqttClient_ReturnCodeToString(rc), rc);
}
if (rc != MQTT_CODE_SUCCESS) {
goto disconn;
}
#ifdef WOLFMQTT_V5
if (mqttCtx->connect.props != NULL) {
/* Release the allocated properties */
MqttClient_PropsFree(mqttCtx->connect.props);
}
if (mqttCtx->lwt_msg.props != NULL) {
/* Release the allocated properties */
MqttClient_PropsFree(mqttCtx->lwt_msg.props);
}
#endif
/* Publish Topic */
XMEMSET(&mqttCtx->publish, 0, sizeof(MqttPublish));
mqttCtx->publish.retain = mqttCtx->retain;
mqttCtx->publish.qos = mqttCtx->qos;
mqttCtx->publish.duplicate = 0;
mqttCtx->publish.topic_name = mqttCtx->topic_name;
mqttCtx->publish.packet_id = mqtt_get_packetid();
if (mqttCtx->pub_file) {
/* If a file is specified, then read into the allocated buffer */
rc = mqtt_file_load(mqttCtx->pub_file, &mqttCtx->publish.buffer,
(int*)&mqttCtx->publish.total_len);
if (rc != MQTT_CODE_SUCCESS) {
/* There was an error loading the file */
PRINTF("MQTT Publish file error: %d", rc);
}
}
else {
mqttCtx->publish.buffer = (byte*)mqttCtx->message;
mqttCtx->publish.total_len = (word16)XSTRLEN(mqttCtx->message);
}
if (rc == MQTT_CODE_SUCCESS) {
#ifdef WOLFMQTT_V5
{
/* Payload Format Indicator */
MqttProp* prop = MqttClient_PropsAdd(&mqttCtx->publish.props);
prop->type = MQTT_PROP_PAYLOAD_FORMAT_IND;
prop->data_byte = 1;
}
{
/* Content Type */
MqttProp* prop = MqttClient_PropsAdd(&mqttCtx->publish.props);
prop->type = MQTT_PROP_CONTENT_TYPE;
prop->data_str.str = (char*)"wolf_type";
prop->data_str.len = (word16)XSTRLEN(prop->data_str.str);
}
if ((mqttCtx->topic_alias_max > 0) &&
(mqttCtx->topic_alias > 0) &&
(mqttCtx->topic_alias < mqttCtx->topic_alias_max)) {
/* Topic Alias */
MqttProp* prop = MqttClient_PropsAdd(&mqttCtx->publish.props);
prop->type = MQTT_PROP_TOPIC_ALIAS;
prop->data_short = mqttCtx->topic_alias;
}
#endif
/* This loop allows payloads larger than the buffer to be sent by
* repeatedly calling publish. */
do {
rc = MqttClient_Publish(&mqttCtx->client, &mqttCtx->publish);
} while (rc == MQTT_CODE_PUB_CONTINUE);
if ((mqttCtx->pub_file) && (mqttCtx->publish.buffer)) {
WOLFMQTT_FREE(mqttCtx->publish.buffer);
mqttCtx->publish.buffer = NULL;
mqttCtx->pub_file = NULL; /* don't try and send file again */
}
if (mqttCtx->debug_on) {
PRINTF("MQTT Publish: Topic %s, ID %d, %s (%d)",
mqttCtx->publish.topic_name, mqttCtx->publish.packet_id,
MqttClient_ReturnCodeToString(rc), rc);
}
if (rc != MQTT_CODE_SUCCESS) {
#ifdef WOLFMQTT_V5
if (mqttCtx->qos > 0) {
PRINTF("\tResponse Reason Code %d", mqttCtx->publish.resp.reason_code);
}
#endif
goto disconn;
}
#ifdef WOLFMQTT_V5
if (mqttCtx->publish.props != NULL) {
/* Release the allocated properties */
MqttClient_PropsFree(mqttCtx->publish.props);
}
#endif
}
disconn:
/* Preserve error code through disconnect */
mqttCtx->return_code = rc;
/* Disconnect */
XMEMSET(&mqttCtx->disconnect, 0, sizeof(mqttCtx->disconnect));
#ifdef WOLFMQTT_V5
{
/* Session expiry interval */
MqttProp* prop = MqttClient_PropsAdd(&mqttCtx->disconnect.props);
prop->type = MQTT_PROP_SESSION_EXPIRY_INTERVAL;
prop->data_int = 0;
}
#if 0 /* enable to test sending a disconnect reason code */
if (mqttCtx->enable_lwt) {
/* Disconnect with Will Message */
mqttCtx->disconnect.reason_code = MQTT_REASON_DISCONNECT_W_WILL_MSG;
}
#endif
#endif
rc = MqttClient_Disconnect_ex(&mqttCtx->client, &mqttCtx->disconnect);
#ifdef WOLFMQTT_V5
if (mqttCtx->disconnect.props != NULL) {
/* Release the allocated properties */
MqttClient_PropsFree(mqttCtx->disconnect.props);
}
#endif
if (mqttCtx->debug_on) {
PRINTF("MQTT Disconnect: %s (%d)",
MqttClient_ReturnCodeToString(rc), rc);
}
rc = MqttClient_NetDisconnect(&mqttCtx->client);
if (mqttCtx->debug_on) {
PRINTF("MQTT Socket Disconnect: %s (%d)",
MqttClient_ReturnCodeToString(rc), rc);
}
exit:
/* Free resources */
if (mqttCtx->tx_buf) WOLFMQTT_FREE(mqttCtx->tx_buf);
if (mqttCtx->rx_buf) WOLFMQTT_FREE(mqttCtx->rx_buf);
/* Cleanup network */
MqttClientNet_DeInit(&mqttCtx->net);
MqttClient_DeInit(&mqttCtx->client);
return mqttCtx->return_code;
}
/* so overall tests can pull in test function */
#ifdef USE_WINDOWS_API
#include <windows.h> /* for ctrl handler */
static BOOL CtrlHandler(DWORD fdwCtrlType)
{
if (fdwCtrlType == CTRL_C_EVENT) {
PRINTF("Received Ctrl+c");
return TRUE;
}
return FALSE;
}
#elif HAVE_SIGNAL
#include <signal.h>
static void sig_handler(int signo)
{
if (signo == SIGINT) {
PRINTF("Received SIGINT");
}
}
#endif
#if defined(NO_MAIN_DRIVER)
int mqttPub_main(int argc, char** argv)
#else
int main(int argc, char** argv)
#endif
{
int rc;
MQTTCtx mqttCtx;
/* init defaults */
mqtt_init_ctx(&mqttCtx);
/* Set default host to localhost */
mqttCtx.host = "localhost";
/* Set default client ID */
mqttCtx.client_id = "wolfMQTT_pub";
/* Set example debug messages off (turn on with '-d') */
mqttCtx.debug_on = 0;
/* parse arguments */
rc = mqtt_parse_args(&mqttCtx, argc, argv);
if (rc != 0) {
if (rc == MY_EX_USAGE) {
/* return success, so make check passes with TLS disabled */
return 0;
}
return rc;
}
#ifdef USE_WINDOWS_API
if (SetConsoleCtrlHandler((PHANDLER_ROUTINE)CtrlHandler,
TRUE) == FALSE)
{
PRINTF("Error setting Ctrl Handler! Error %d", (int)GetLastError());
}
#elif HAVE_SIGNAL
if (signal(SIGINT, sig_handler) == SIG_ERR) {
PRINTF("Can't catch SIGINT");
}
#endif
rc = pub_client(&mqttCtx);
mqtt_free_ctx(&mqttCtx);
return (rc == 0) ? 0 : EXIT_FAILURE;
}
Reference in New Issue View Git Blame Copy Permalink