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mqtt_client.c
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#include <stdint.h>
#include <stdlib.h>
#include "esp_err.h"
#include "esp_log.h"
#include "esp_heap_caps.h"
#include "esp_transport.h"
#include "mqtt_client.h"
#include "mqtt_client_priv.h"
#include "mqtt_msg.h"
#include "mqtt_outbox.h"
_Static_assert(sizeof(uint64_t) == sizeof(outbox_tick_t), "mqtt-client tick type size different from outbox tick type");
#ifdef ESP_EVENT_ANY_ID
_Static_assert(MQTT_EVENT_ANY == ESP_EVENT_ANY_ID, "mqtt-client event enum does not match the global EVENT_ANY_ID");
#endif
static const char *TAG = "mqtt_client";
#ifdef MQTT_SUPPORTED_FEATURE_EVENT_LOOP
/**
* @brief Define of MQTT Event base
*
*/
ESP_EVENT_DEFINE_BASE(MQTT_EVENTS);
#endif
const static int STOPPED_BIT = (1 << 0);
const static int RECONNECT_BIT = (1 << 1);
const static int DISCONNECT_BIT = (1 << 2);
static esp_err_t esp_mqtt_dispatch_event(esp_mqtt_client_handle_t client);
static esp_err_t esp_mqtt_dispatch_event_with_msgid(esp_mqtt_client_handle_t client);
static esp_err_t esp_mqtt_connect(esp_mqtt_client_handle_t client, int timeout_ms);
static void esp_mqtt_abort_connection(esp_mqtt_client_handle_t client);
static esp_err_t esp_mqtt_client_ping(esp_mqtt_client_handle_t client);
static char *create_string(const char *ptr, int len);
static int mqtt_message_receive(esp_mqtt_client_handle_t client, int read_poll_timeout_ms);
static void esp_mqtt_client_dispatch_transport_error(esp_mqtt_client_handle_t client);
static esp_err_t send_disconnect_msg(esp_mqtt_client_handle_t client);
/**
* @brief Processes error reported from transport layer (considering the message read status)
*
* @param err: Error reported from TCP transport
* @param client: MQTT client handle
* @param mid_message: True if the error occured when reading incomplete message
*
* @return - 0 on Timeout
* - -1 on Timeout with incomplete message
* - -2 on Error or EOF
*/
static int esp_mqtt_handle_transport_read_error(int err, esp_mqtt_client_handle_t client, bool mid_message)
{
if (err == ERR_TCP_TRANSPORT_CONNECTION_TIMEOUT) {
if (mid_message) {
// No error message, because we could've read with timeout 0 (caller will decide)
return -1;
}
// Not an error, continue
ESP_LOGV(TAG, "%s: transport_read(): call timed out before data was ready!", __func__);
return 0;
}
if (err == ERR_TCP_TRANSPORT_CONNECTION_CLOSED_BY_FIN) {
ESP_LOGE(TAG, "%s: transport_read(): EOF", __func__);
}
ESP_LOGE(TAG, "%s: transport_read() error: errno=%d", __func__, errno);
esp_mqtt_client_dispatch_transport_error(client);
return -2;
}
#if MQTT_ENABLE_SSL
enum esp_mqtt_ssl_cert_key_api {
MQTT_SSL_DATA_API_CA_CERT,
MQTT_SSL_DATA_API_CLIENT_CERT,
MQTT_SSL_DATA_API_CLIENT_KEY,
MQTT_SSL_DATA_API_MAX,
};
static esp_err_t esp_mqtt_set_cert_key_data(esp_transport_handle_t ssl, enum esp_mqtt_ssl_cert_key_api what, const char *cert_key_data, int cert_key_len)
{
char *data = (char *)cert_key_data;
int ssl_transport_api_id = what;
int len = cert_key_len;
if (!data) {
return ESP_OK;
}
if (len == 0) {
// if length not specified, expect 0-terminated PEM string
// and the original transport_api_id (by convention after the last api_id in the enum)
ssl_transport_api_id += MQTT_SSL_DATA_API_MAX;
len = strlen(data);
}
#ifndef MQTT_SUPPORTED_FEATURE_DER_CERTIFICATES
else {
ESP_LOGE(TAG, "Explicit cert-/key-len is not available in IDF version %s", IDF_VER);
return ESP_ERR_NOT_SUPPORTED;
}
#endif
// option to force the cert/key config to null (i.e. skip validation) when existing config updates
if (0 == strcmp(data, "NULL")) {
data = NULL;
len = 0;
}
switch (ssl_transport_api_id) {
#ifdef MQTT_SUPPORTED_FEATURE_DER_CERTIFICATES
case MQTT_SSL_DATA_API_CA_CERT:
esp_transport_ssl_set_cert_data_der(ssl, data, len);
break;
case MQTT_SSL_DATA_API_CLIENT_CERT:
esp_transport_ssl_set_client_cert_data_der(ssl, data, len);
break;
case MQTT_SSL_DATA_API_CLIENT_KEY:
esp_transport_ssl_set_client_key_data_der(ssl, data, len);
break;
#endif
case MQTT_SSL_DATA_API_CA_CERT + MQTT_SSL_DATA_API_MAX:
esp_transport_ssl_set_cert_data(ssl, data, len);
break;
case MQTT_SSL_DATA_API_CLIENT_CERT + MQTT_SSL_DATA_API_MAX:
esp_transport_ssl_set_client_cert_data(ssl, data, len);
break;
case MQTT_SSL_DATA_API_CLIENT_KEY + MQTT_SSL_DATA_API_MAX:
esp_transport_ssl_set_client_key_data(ssl, data, len);
break;
default:
return ESP_ERR_INVALID_ARG;
}
return ESP_OK;
}
static esp_err_t esp_mqtt_set_ssl_transport_properties(esp_transport_list_handle_t transport_list, mqtt_config_storage_t *cfg)
{
esp_transport_handle_t ssl = esp_transport_list_get_transport(transport_list, MQTT_OVER_SSL_SCHEME);
if (cfg->use_global_ca_store == true) {
esp_transport_ssl_enable_global_ca_store(ssl);
} else if (cfg->crt_bundle_attach != NULL) {
#ifdef MQTT_SUPPORTED_FEATURE_CERTIFICATE_BUNDLE
#ifdef CONFIG_MBEDTLS_CERTIFICATE_BUNDLE
esp_transport_ssl_crt_bundle_attach(ssl, cfg->crt_bundle_attach);
#else
ESP_LOGE(TAG, "Certificate bundle is not enabled for mbedTLS in menuconfig");
goto esp_mqtt_set_transport_failed;
#endif /* CONFIG_MBEDTLS_CERTIFICATE_BUNDLE */
#else
ESP_LOGE(TAG, "Certificate bundle feature is not available in IDF version %s", IDF_VER);
goto esp_mqtt_set_transport_failed;
#endif /* MQTT_SUPPORTED_FEATURE_CERTIFICATE_BUNDLE */
} else {
ESP_OK_CHECK(TAG, esp_mqtt_set_cert_key_data(ssl, MQTT_SSL_DATA_API_CA_CERT, cfg->cacert_buf, cfg->cacert_bytes),
goto esp_mqtt_set_transport_failed);
}
if (cfg->psk_hint_key) {
#if defined(MQTT_SUPPORTED_FEATURE_PSK_AUTHENTICATION) && MQTT_ENABLE_SSL
#ifdef CONFIG_ESP_TLS_PSK_VERIFICATION
esp_transport_ssl_set_psk_key_hint(ssl, cfg->psk_hint_key);
#else
ESP_LOGE(TAG, "PSK authentication configured but not enabled in menuconfig: Please enable ESP_TLS_PSK_VERIFICATION option");
goto esp_mqtt_set_transport_failed;
#endif
#else
ESP_LOGE(TAG, "PSK authentication is not available in IDF version %s", IDF_VER);
goto esp_mqtt_set_transport_failed;
#endif
}
if (cfg->alpn_protos) {
#if defined(MQTT_SUPPORTED_FEATURE_ALPN) && MQTT_ENABLE_SSL
#if defined(CONFIG_MBEDTLS_SSL_ALPN) || defined(CONFIG_WOLFSSL_HAVE_ALPN)
esp_transport_ssl_set_alpn_protocol(ssl, (const char **)cfg->alpn_protos);
#else
ESP_LOGE(TAG, "APLN configured but not enabled in menuconfig: Please enable MBEDTLS_SSL_ALPN or WOLFSSL_HAVE_ALPN option");
goto esp_mqtt_set_transport_failed;
#endif
#else
ESP_LOGE(TAG, "APLN is not available in IDF version %s", IDF_VER);
goto esp_mqtt_set_transport_failed;
#endif
}
if (cfg->skip_cert_common_name_check) {
#if defined(MQTT_SUPPORTED_FEATURE_SKIP_CRT_CMN_NAME_CHECK) && MQTT_ENABLE_SSL
esp_transport_ssl_skip_common_name_check(ssl);
#else
ESP_LOGE(TAG, "Skip certificate common name check is not available in IDF version %s", IDF_VER);
goto esp_mqtt_set_transport_failed;
#endif
}
if (cfg->common_name) {
#if defined(MQTT_SUPPORTED_FEATURE_CRT_CMN_NAME) && MQTT_ENABLE_SSL
esp_transport_ssl_set_common_name(ssl, cfg->common_name);
#else
ESP_LOGE(TAG, "Setting expected certificate common name is not available in IDF version %s", IDF_VER);
goto esp_mqtt_set_transport_failed;
#endif
}
if (cfg->use_secure_element) {
#ifdef MQTT_SUPPORTED_FEATURE_SECURE_ELEMENT
#ifdef CONFIG_ESP_TLS_USE_SECURE_ELEMENT
esp_transport_ssl_use_secure_element(ssl);
#else
ESP_LOGE(TAG, "Secure element not enabled for esp-tls in menuconfig");
goto esp_mqtt_set_transport_failed;
#endif /* CONFIG_ESP_TLS_USE_SECURE_ELEMENT */
#else
ESP_LOGE(TAG, "Secure element feature is not available in IDF version %s", IDF_VER);
goto esp_mqtt_set_transport_failed;
#endif /* MQTT_SUPPORTED_FEATURE_SECURE_ELEMENT */
}
if (cfg->ds_data != NULL) {
#ifdef MQTT_SUPPORTED_FEATURE_DIGITAL_SIGNATURE
#ifdef CONFIG_ESP_TLS_USE_DS_PERIPHERAL
esp_transport_ssl_set_ds_data(ssl, cfg->ds_data);
#else
ESP_LOGE(TAG, "Digital Signature not enabled for esp-tls in menuconfig");
goto esp_mqtt_set_transport_failed;
#endif /* CONFIG_ESP_TLS_USE_DS_PERIPHERAL */
#else
ESP_LOGE(TAG, "Digital Signature feature is not available in IDF version %s", IDF_VER);
goto esp_mqtt_set_transport_failed;
#endif
}
ESP_OK_CHECK(TAG, esp_mqtt_set_cert_key_data(ssl, MQTT_SSL_DATA_API_CLIENT_CERT, cfg->clientcert_buf, cfg->clientcert_bytes),
goto esp_mqtt_set_transport_failed);
ESP_OK_CHECK(TAG, esp_mqtt_set_cert_key_data(ssl, MQTT_SSL_DATA_API_CLIENT_KEY, cfg->clientkey_buf, cfg->clientkey_bytes),
goto esp_mqtt_set_transport_failed);
if (cfg->clientkey_password && cfg->clientkey_password_len) {
#if defined(MQTT_SUPPORTED_FEATURE_CLIENT_KEY_PASSWORD) && MQTT_ENABLE_SSL
esp_transport_ssl_set_client_key_password(ssl,
cfg->clientkey_password,
cfg->clientkey_password_len);
#else
ESP_LOGE(TAG, "Password protected keys are not available in IDF version %s", IDF_VER);
goto esp_mqtt_set_transport_failed;
#endif
}
return ESP_OK;
esp_mqtt_set_transport_failed:
return ESP_FAIL;
}
#endif // MQTT_ENABLE_SSL
/* Checks if the user supplied config values are internally consistent */
static esp_err_t esp_mqtt_check_cfg_conflict(const mqtt_config_storage_t *cfg, const esp_mqtt_client_config_t *user_cfg)
{
if (cfg == NULL || user_cfg == NULL) {
ESP_LOGE(TAG, "Invalid configuration");
return ESP_ERR_INVALID_ARG;
}
esp_err_t ret = ESP_OK;
bool ssl_cfg_enabled = cfg->use_global_ca_store || cfg->cacert_buf || cfg->clientcert_buf || cfg->psk_hint_key || cfg->alpn_protos;
bool is_ssl_scheme = false;
if (cfg->scheme) {
is_ssl_scheme = (strncasecmp(cfg->scheme, MQTT_OVER_SSL_SCHEME, sizeof(MQTT_OVER_SSL_SCHEME)) == 0) || (strncasecmp(cfg->scheme, MQTT_OVER_WSS_SCHEME, sizeof(MQTT_OVER_WSS_SCHEME)) == 0);
}
if (!is_ssl_scheme && ssl_cfg_enabled) {
if (cfg->uri) {
ESP_LOGW(TAG, "SSL related configs set, but the URI scheme specifies a non-SSL scheme, scheme = %s", cfg->scheme);
} else {
ESP_LOGW(TAG, "SSL related configs set, but the transport protocol is a non-SSL scheme, transport = %d", user_cfg->broker.address.transport);
}
ret = ESP_ERR_INVALID_ARG;
}
if (cfg->uri && user_cfg->broker.address.transport) {
ESP_LOGW(TAG, "Transport config set, but overridden by scheme from URI: transport = %d, uri scheme = %s", user_cfg->broker.address.transport, cfg->scheme);
ret = ESP_ERR_INVALID_ARG;
}
return ret;
}
bool esp_mqtt_set_if_config(char const *const new_config, char **old_config)
{
if (new_config) {
free(*old_config);
*old_config = strdup(new_config);
if (*old_config == NULL) {
return false;
}
}
return true;
}
static esp_err_t esp_mqtt_client_create_transport(esp_mqtt_client_handle_t client)
{
esp_err_t ret = ESP_OK;
if (client->transport_list) {
esp_transport_list_destroy(client->transport_list);
client->transport_list = NULL;
}
if (client->config->scheme) {
client->transport_list = esp_transport_list_init();
ESP_MEM_CHECK(TAG, client->transport_list, return ESP_ERR_NO_MEM);
if ((strncasecmp(client->config->scheme, MQTT_OVER_TCP_SCHEME, sizeof(MQTT_OVER_TCP_SCHEME)) == 0) || (strncasecmp(client->config->scheme, MQTT_OVER_WS_SCHEME, sizeof(MQTT_OVER_WS_SCHEME)) == 0)) {
esp_transport_handle_t tcp = esp_transport_tcp_init();
ESP_MEM_CHECK(TAG, tcp, return ESP_ERR_NO_MEM);
esp_transport_set_default_port(tcp, MQTT_TCP_DEFAULT_PORT);
if (client->config->if_name) {
esp_transport_tcp_set_interface_name(tcp, client->config->if_name);
}
esp_transport_list_add(client->transport_list, tcp, MQTT_OVER_TCP_SCHEME);
if (strncasecmp(client->config->scheme, MQTT_OVER_WS_SCHEME, sizeof(MQTT_OVER_WS_SCHEME)) == 0) {
#if MQTT_ENABLE_WS
esp_transport_handle_t ws = esp_transport_ws_init(tcp);
ESP_MEM_CHECK(TAG, ws, return ESP_ERR_NO_MEM);
esp_transport_set_default_port(ws, MQTT_WS_DEFAULT_PORT);
if (client->config->path) {
esp_transport_ws_set_path(ws, client->config->path);
}
#ifdef MQTT_SUPPORTED_FEATURE_WS_SUBPROTOCOL
esp_transport_ws_set_subprotocol(ws, MQTT_OVER_TCP_SCHEME);
#endif
esp_transport_list_add(client->transport_list, ws, MQTT_OVER_WS_SCHEME);
#else
ESP_LOGE(TAG, "Please enable MQTT_ENABLE_WS to use %s", client->config->scheme);
ret = ESP_FAIL;
#endif
}
} else if ((strncasecmp(client->config->scheme, MQTT_OVER_SSL_SCHEME, sizeof(MQTT_OVER_SSL_SCHEME)) == 0) || (strncasecmp(client->config->scheme, MQTT_OVER_WSS_SCHEME, sizeof(MQTT_OVER_WSS_SCHEME)) == 0)) {
#if MQTT_ENABLE_SSL
esp_transport_handle_t ssl = esp_transport_ssl_init();
ESP_MEM_CHECK(TAG, ssl, return ESP_ERR_NO_MEM);
esp_transport_set_default_port(ssl, MQTT_SSL_DEFAULT_PORT);
if (client->config->if_name) {
esp_transport_ssl_set_interface_name(ssl, client->config->if_name);
}
esp_transport_list_add(client->transport_list, ssl, MQTT_OVER_SSL_SCHEME);
if (strncasecmp(client->config->scheme, MQTT_OVER_WSS_SCHEME, sizeof(MQTT_OVER_WSS_SCHEME)) == 0) {
#if MQTT_ENABLE_WS
esp_transport_handle_t wss = esp_transport_ws_init(ssl);
ESP_MEM_CHECK(TAG, wss, return ESP_ERR_NO_MEM);
esp_transport_set_default_port(wss, MQTT_WSS_DEFAULT_PORT);
if (client->config->path) {
esp_transport_ws_set_path(wss, client->config->path);
}
#ifdef MQTT_SUPPORTED_FEATURE_WS_SUBPROTOCOL
esp_transport_ws_set_subprotocol(wss, MQTT_OVER_TCP_SCHEME);
#endif
esp_transport_list_add(client->transport_list, wss, MQTT_OVER_WSS_SCHEME);
#else
ESP_LOGE(TAG, "Please enable MQTT_ENABLE_WS to use %s", client->config->scheme);
ret = ESP_FAIL;
#endif
}
#else
ESP_LOGE(TAG, "Please enable MQTT_ENABLE_SSL to use %s", client->config->scheme);
ret = ESP_FAIL;
#endif
} else {
ESP_LOGE(TAG, "Not support this mqtt scheme %s", client->config->scheme);
ret = ESP_FAIL;
}
} else {
ESP_LOGE(TAG, "No scheme found");
ret = ESP_FAIL;
}
return ret;
}
esp_err_t esp_mqtt_set_config(esp_mqtt_client_handle_t client, const esp_mqtt_client_config_t *config)
{
if (!client) {
ESP_LOGE(TAG, "Client was not initialized");
return ESP_ERR_INVALID_ARG;
}
MQTT_API_LOCK(client);
//Copy user configurations to client context
esp_err_t err = ESP_OK;
if (!client->config) {
client->config = calloc(1, sizeof(mqtt_config_storage_t));
ESP_MEM_CHECK(TAG, client->config, {
MQTT_API_UNLOCK(client);
return ESP_ERR_NO_MEM;
});
}
mqtt_msg_buffer_destroy(&client->mqtt_state.connection);
int buffer_size = config->buffer.size;
if (buffer_size <= 0) {
buffer_size = MQTT_BUFFER_SIZE_BYTE;
}
// use separate value for output buffer size if configured
int out_buffer_size = config->buffer.out_size > 0 ? config->buffer.out_size : buffer_size;
if (mqtt_msg_buffer_init(&client->mqtt_state.connection, out_buffer_size) != ESP_OK) {
goto _mqtt_set_config_failed;
}
free(client->mqtt_state.in_buffer);
client->mqtt_state.in_buffer = (uint8_t *)malloc(buffer_size);
ESP_MEM_CHECK(TAG, client->mqtt_state.in_buffer, goto _mqtt_set_config_failed);
client->mqtt_state.in_buffer_length = buffer_size;
client->config->message_retransmit_timeout = config->session.message_retransmit_timeout;
if (config->session.message_retransmit_timeout <= 0) {
client->config->message_retransmit_timeout = MQTT_DEFAULT_RETRANSMIT_TIMEOUT_MS;
}
client->config->task_prio = config->task.priority;
if (client->config->task_prio <= 0) {
client->config->task_prio = MQTT_TASK_PRIORITY;
}
client->config->task_stack = config->task.stack_size;
if (client->config->task_stack <= 0) {
client->config->task_stack = MQTT_TASK_STACK;
}
if (config->broker.address.port) {
client->config->port = config->broker.address.port;
}
if (config->network.tcp_keep_alive_cfg.keep_alive_enable) {
client->config->tcp_keep_alive_cfg = config->network.tcp_keep_alive_cfg;
}
err = ESP_ERR_NO_MEM;
ESP_MEM_CHECK(TAG, esp_mqtt_set_if_config(config->broker.address.hostname, &client->config->host), goto _mqtt_set_config_failed);
ESP_MEM_CHECK(TAG, esp_mqtt_set_if_config(config->broker.address.path, &client->config->path), goto _mqtt_set_config_failed);
ESP_MEM_CHECK(TAG, esp_mqtt_set_if_config(config->credentials.username, &client->mqtt_state.connection.information.username), goto _mqtt_set_config_failed);
ESP_MEM_CHECK(TAG, esp_mqtt_set_if_config(config->credentials.authentication.password, &client->mqtt_state.connection.information.password), goto _mqtt_set_config_failed);
if (!config->credentials.set_null_client_id) {
if (config->credentials.client_id) {
ESP_MEM_CHECK(TAG, esp_mqtt_set_if_config(config->credentials.client_id, &client->mqtt_state.connection.information.client_id), goto _mqtt_set_config_failed);
} else if (client->mqtt_state.connection.information.client_id == NULL) {
client->mqtt_state.connection.information.client_id = platform_create_id_string();
}
ESP_MEM_CHECK(TAG, client->mqtt_state.connection.information.client_id, goto _mqtt_set_config_failed);
ESP_LOGD(TAG, "MQTT client_id=%s", client->mqtt_state.connection.information.client_id);
}
ESP_MEM_CHECK(TAG, esp_mqtt_set_if_config(config->broker.address.uri, &client->config->uri), goto _mqtt_set_config_failed);
ESP_MEM_CHECK(TAG, esp_mqtt_set_if_config(config->session.last_will.topic, &client->mqtt_state.connection.information.will_topic), goto _mqtt_set_config_failed);
if (config->session.last_will.msg_len && config->session.last_will.msg) {
free(client->mqtt_state.connection.information.will_message);
client->mqtt_state.connection.information.will_message = malloc(config->session.last_will.msg_len);
ESP_MEM_CHECK(TAG, client->mqtt_state.connection.information.will_message, goto _mqtt_set_config_failed);
memcpy(client->mqtt_state.connection.information.will_message, config->session.last_will.msg, config->session.last_will.msg_len);
client->mqtt_state.connection.information.will_length = config->session.last_will.msg_len;
} else if (config->session.last_will.msg) {
free(client->mqtt_state.connection.information.will_message);
client->mqtt_state.connection.information.will_message = strdup(config->session.last_will.msg);
ESP_MEM_CHECK(TAG, client->mqtt_state.connection.information.will_message, goto _mqtt_set_config_failed);
client->mqtt_state.connection.information.will_length = strlen(config->session.last_will.msg);
}
if (config->session.last_will.qos) {
client->mqtt_state.connection.information.will_qos = config->session.last_will.qos;
}
if (config->session.last_will.retain) {
client->mqtt_state.connection.information.will_retain = config->session.last_will.retain;
}
if (config->session.disable_clean_session == client->mqtt_state.connection.information.clean_session) {
client->mqtt_state.connection.information.clean_session = !config->session.disable_clean_session;
if (!client->mqtt_state.connection.information.clean_session && config->credentials.set_null_client_id) {
ESP_LOGE(TAG, "Clean Session flag must be true if client has a null id");
}
}
if (config->session.keepalive) {
client->mqtt_state.connection.information.keepalive = config->session.keepalive;
}
if (client->mqtt_state.connection.information.keepalive == 0) {
client->mqtt_state.connection.information.keepalive = MQTT_KEEPALIVE_TICK;
}
if (config->session.disable_keepalive) {
// internal `keepalive` value (in connect_info) is in line with 3.1.2.10 Keep Alive from mqtt spec:
// * keepalive=0: Keep alive mechanism disabled (server not to disconnect the client on its inactivity)
// * period in seconds to send a Control packet if inactive
client->mqtt_state.connection.information.keepalive = 0;
}
if (config->session.protocol_ver) {
client->mqtt_state.connection.information.protocol_ver = config->session.protocol_ver;
}
if (client->mqtt_state.connection.information.protocol_ver == MQTT_PROTOCOL_UNDEFINED) {
#ifdef MQTT_PROTOCOL_311
client->mqtt_state.connection.information.protocol_ver = MQTT_PROTOCOL_V_3_1_1;
#else
client->mqtt_state.connection.information.protocol_ver = MQTT_PROTOCOL_V_3_1;
#endif
} else if (client->mqtt_state.connection.information.protocol_ver == MQTT_PROTOCOL_V_5) {
#ifndef MQTT_PROTOCOL_5
ESP_LOGE(TAG, "Please first enable MQTT_PROTOCOL_5 feature in menuconfig");
goto _mqtt_set_config_failed;
#endif
}
client->config->network_timeout_ms = config->network.timeout_ms;
if (client->config->network_timeout_ms <= 0) {
client->config->network_timeout_ms = MQTT_NETWORK_TIMEOUT_MS;
}
if (config->network.refresh_connection_after_ms) {
client->config->refresh_connection_after_ms = config->network.refresh_connection_after_ms;
}
client->config->auto_reconnect = true;
if (config->network.disable_auto_reconnect == client->config->auto_reconnect) {
client->config->auto_reconnect = !config->network.disable_auto_reconnect;
}
if (config->network.reconnect_timeout_ms) {
client->config->reconnect_timeout_ms = config->network.reconnect_timeout_ms;
} else {
client->config->reconnect_timeout_ms = MQTT_RECON_DEFAULT_MS;
}
client->config->transport = config->network.transport;
if (config->network.if_name) {
client->config->if_name = calloc(1, sizeof(struct ifreq) + 1);
ESP_MEM_CHECK(TAG, client->config->if_name, goto _mqtt_set_config_failed);
memcpy(client->config->if_name, config->network.if_name, sizeof(struct ifreq));
}
if (config->broker.verification.alpn_protos) {
for (int i = 0; i < client->config->num_alpn_protos; i++) {
free(client->config->alpn_protos[i]);
}
free(client->config->alpn_protos);
client->config->num_alpn_protos = 0;
const char **p;
for (p = config->broker.verification.alpn_protos; *p != NULL; p++ ) {
client->config->num_alpn_protos++;
}
// mbedTLS expects the list to be null-terminated
client->config->alpn_protos = calloc(client->config->num_alpn_protos + 1, sizeof(*config->broker.verification.alpn_protos));
ESP_MEM_CHECK(TAG, client->config->alpn_protos, goto _mqtt_set_config_failed);
for (int i = 0; i < client->config->num_alpn_protos; i++) {
client->config->alpn_protos[i] = strdup(config->broker.verification.alpn_protos[i]);
ESP_MEM_CHECK(TAG, client->config->alpn_protos[i], goto _mqtt_set_config_failed);
}
}
// configure ssl related parameters
client->config->use_global_ca_store = config->broker.verification.use_global_ca_store;
client->config->cacert_buf = config->broker.verification.certificate;
client->config->cacert_bytes = config->broker.verification.certificate_len;
client->config->psk_hint_key = config->broker.verification.psk_hint_key;
client->config->crt_bundle_attach = config->broker.verification.crt_bundle_attach;
client->config->clientcert_buf = config->credentials.authentication.certificate;
client->config->clientcert_bytes = config->credentials.authentication.certificate_len;
client->config->clientkey_buf = config->credentials.authentication.key;
client->config->clientkey_bytes = config->credentials.authentication.key_len;
client->config->skip_cert_common_name_check = config->broker.verification.skip_cert_common_name_check;
client->config->common_name = config->broker.verification.common_name;
client->config->use_secure_element = config->credentials.authentication.use_secure_element;
client->config->ds_data = config->credentials.authentication.ds_data;
if (config->credentials.authentication.key_password && config->credentials.authentication.key_password_len) {
client->config->clientkey_password_len = config->credentials.authentication.key_password_len;
client->config->clientkey_password = malloc(client->config->clientkey_password_len);
ESP_MEM_CHECK(TAG, client->config->clientkey_password, goto _mqtt_set_config_failed);
memcpy(client->config->clientkey_password, config->credentials.authentication.key_password, client->config->clientkey_password_len);
}
if (config->broker.address.transport) {
free(client->config->scheme);
client->config->scheme = NULL;
if (config->broker.address.transport == MQTT_TRANSPORT_OVER_TCP) {
client->config->scheme = create_string(MQTT_OVER_TCP_SCHEME, strlen(MQTT_OVER_TCP_SCHEME));
ESP_MEM_CHECK(TAG, client->config->scheme, goto _mqtt_set_config_failed);
}
#if MQTT_ENABLE_WS
else if (config->broker.address.transport == MQTT_TRANSPORT_OVER_WS) {
client->config->scheme = create_string(MQTT_OVER_WS_SCHEME, strlen(MQTT_OVER_WS_SCHEME));
ESP_MEM_CHECK(TAG, client->config->scheme, goto _mqtt_set_config_failed);
}
#endif
#if MQTT_ENABLE_SSL
else if (config->broker.address.transport == MQTT_TRANSPORT_OVER_SSL) {
client->config->scheme = create_string(MQTT_OVER_SSL_SCHEME, strlen(MQTT_OVER_SSL_SCHEME));
ESP_MEM_CHECK(TAG, client->config->scheme, goto _mqtt_set_config_failed);
}
#endif
#if MQTT_ENABLE_WSS
else if (config->broker.address.transport == MQTT_TRANSPORT_OVER_WSS) {
client->config->scheme = create_string(MQTT_OVER_WSS_SCHEME, strlen(MQTT_OVER_WSS_SCHEME));
ESP_MEM_CHECK(TAG, client->config->scheme, goto _mqtt_set_config_failed);
}
#endif
}
// Set uri at the end of config to override separately configured uri elements
if (config->broker.address.uri) {
if (esp_mqtt_client_set_uri(client, client->config->uri) != ESP_OK) {
err = ESP_FAIL;
goto _mqtt_set_config_failed;
}
}
client->config->outbox_limit = config->outbox.limit;
esp_err_t config_has_conflict = esp_mqtt_check_cfg_conflict(client->config, config);
MQTT_API_UNLOCK(client);
return config_has_conflict;
_mqtt_set_config_failed:
esp_mqtt_destroy_config(client);
MQTT_API_UNLOCK(client);
return err;
}
void esp_mqtt_destroy_config(esp_mqtt_client_handle_t client)
{
if (client->config == NULL) {
return;
}
free(client->mqtt_state.in_buffer);
mqtt_msg_buffer_destroy(&client->mqtt_state.connection);
free(client->config->host);
free(client->config->uri);
free(client->config->path);
free(client->config->scheme);
for (int i = 0; i < client->config->num_alpn_protos; i++) {
free(client->config->alpn_protos[i]);
}
free(client->config->alpn_protos);
free(client->config->clientkey_password);
free(client->config->if_name);
free(client->mqtt_state.connection.information.will_topic);
free(client->mqtt_state.connection.information.will_message);
free(client->mqtt_state.connection.information.client_id);
free(client->mqtt_state.connection.information.username);
free(client->mqtt_state.connection.information.password);
#ifdef MQTT_PROTOCOL_5
esp_mqtt5_client_destory(client);
#endif
memset(&client->mqtt_state.connection.information, 0, sizeof(mqtt_connect_info_t));
#ifdef MQTT_SUPPORTED_FEATURE_EVENT_LOOP
if (client->config->event_loop_handle) {
esp_event_loop_delete(client->config->event_loop_handle);
}
#endif
esp_transport_destroy(client->config->transport);
memset(client->config, 0, sizeof(mqtt_config_storage_t));
free(client->config);
client->config = NULL;
}
static inline bool has_timed_out(uint64_t last_tick, uint64_t timeout)
{
uint64_t next = last_tick + timeout;
return (int64_t)(next - platform_tick_get_ms()) <= 0;
}
static esp_err_t process_keepalive(esp_mqtt_client_handle_t client)
{
if (client->mqtt_state.connection.information.keepalive > 0) {
const uint64_t keepalive_ms = client->mqtt_state.connection.information.keepalive * 1000;
if (client->wait_for_ping_resp == true ) {
if (has_timed_out(client->keepalive_tick, keepalive_ms)) {
ESP_LOGE(TAG, "No PING_RESP, disconnected");
esp_mqtt_abort_connection(client);
client->wait_for_ping_resp = false;
return ESP_FAIL;
}
return ESP_OK;
}
if (has_timed_out(client->keepalive_tick, keepalive_ms / 2)) {
if (esp_mqtt_client_ping(client) == ESP_FAIL) {
ESP_LOGE(TAG, "Can't send ping, disconnected");
esp_mqtt_abort_connection(client);
return ESP_FAIL;
}
client->wait_for_ping_resp = true;
return ESP_OK;
}
}
return ESP_OK;
}
static inline esp_err_t esp_mqtt_write(esp_mqtt_client_handle_t client)
{
int wlen = 0, widx = 0, len = client->mqtt_state.connection.outbound_message.length;
while (len > 0) {
wlen = esp_transport_write(client->transport,
(char *)client->mqtt_state.connection.outbound_message.data + widx,
len,
client->config->network_timeout_ms);
if (wlen < 0) {
ESP_LOGE(TAG, "Writing failed: errno=%d", errno);
esp_mqtt_client_dispatch_transport_error(client);
return ESP_FAIL;
}
if (wlen == 0) {
ESP_LOGE(TAG, "Writing didn't complete in specified timeout: errno=%d", errno);
return ESP_ERR_TIMEOUT;
}
widx += wlen;
len -= wlen;
}
return ESP_OK;
}
static esp_err_t esp_mqtt_connect(esp_mqtt_client_handle_t client, int timeout_ms)
{
int read_len, connect_rsp_code = 0;
client->wait_for_ping_resp = false;
if (client->mqtt_state.connection.information.protocol_ver == MQTT_PROTOCOL_V_5) {
#ifdef MQTT_PROTOCOL_5
mqtt5_msg_connect(&client->mqtt_state.connection,
&client->mqtt_state.connection.information, &client->mqtt5_config->connect_property_info, &client->mqtt5_config->will_property_info);
#endif
} else {
mqtt_msg_connect(&client->mqtt_state.connection,
&client->mqtt_state.connection.information);
}
if (client->mqtt_state.connection.outbound_message.length == 0) {
ESP_LOGE(TAG, "Connect message cannot be created");
return ESP_FAIL;
}
client->mqtt_state.pending_msg_type = mqtt_get_type(client->mqtt_state.connection.outbound_message.data);
if (client->mqtt_state.connection.information.protocol_ver == MQTT_PROTOCOL_V_5) {
#ifdef MQTT_PROTOCOL_5
client->mqtt_state.pending_msg_id = mqtt5_get_id(client->mqtt_state.connection.outbound_message.data,
client->mqtt_state.connection.outbound_message.length);
#endif
} else {
client->mqtt_state.pending_msg_id = mqtt_get_id(client->mqtt_state.connection.outbound_message.data,
client->mqtt_state.connection.outbound_message.length);
}
ESP_LOGD(TAG, "Sending MQTT CONNECT message, type: %d, id: %04X",
client->mqtt_state.pending_msg_type,
client->mqtt_state.pending_msg_id);
if (esp_mqtt_write(client) != ESP_OK) {
return ESP_FAIL;
}
client->mqtt_state.in_buffer_read_len = 0;
client->mqtt_state.message_length = 0;
/* wait configured network timeout for broker connection response */
uint64_t connack_recv_started = platform_tick_get_ms();
do {
read_len = mqtt_message_receive(client, client->config->network_timeout_ms);
} while (read_len == 0 && platform_tick_get_ms() - connack_recv_started < client->config->network_timeout_ms);
if (read_len <= 0) {
ESP_LOGE(TAG, "%s: mqtt_message_receive() returned %d", __func__, read_len);
return ESP_FAIL;
}
if (mqtt_get_type(client->mqtt_state.in_buffer) != MQTT_MSG_TYPE_CONNACK) {
ESP_LOGE(TAG, "Invalid MSG_TYPE response: %d, read_len: %d", mqtt_get_type(client->mqtt_state.in_buffer), read_len);
return ESP_FAIL;
}
if (client->mqtt_state.connection.information.protocol_ver == MQTT_PROTOCOL_V_5) {
#ifdef MQTT_PROTOCOL_5
if (esp_mqtt5_parse_connack(client, &connect_rsp_code) == ESP_OK) {
client->send_publish_packet_count = 0;
return ESP_OK;
}
#endif
} else {
client->mqtt_state.in_buffer_read_len = 0;
connect_rsp_code = mqtt_get_connect_return_code(client->mqtt_state.in_buffer);
if (connect_rsp_code == MQTT_CONNECTION_ACCEPTED) {
ESP_LOGD(TAG, "Connected");
return ESP_OK;
}
switch (connect_rsp_code) {
case MQTT_CONNECTION_REFUSE_PROTOCOL:
ESP_LOGW(TAG, "Connection refused, bad protocol");
break;
case MQTT_CONNECTION_REFUSE_SERVER_UNAVAILABLE:
ESP_LOGW(TAG, "Connection refused, server unavailable");
break;
case MQTT_CONNECTION_REFUSE_BAD_USERNAME:
ESP_LOGW(TAG, "Connection refused, bad username or password");
break;
case MQTT_CONNECTION_REFUSE_NOT_AUTHORIZED:
ESP_LOGW(TAG, "Connection refused, not authorized");
break;
default:
ESP_LOGW(TAG, "Connection refused, Unknow reason");
break;
}
}
/* propagate event with connection refused error */
client->event.event_id = MQTT_EVENT_ERROR;
client->event.error_handle->error_type = MQTT_ERROR_TYPE_CONNECTION_REFUSED;
client->event.error_handle->connect_return_code = connect_rsp_code;
client->event.error_handle->esp_tls_stack_err = 0;
client->event.error_handle->esp_tls_last_esp_err = 0;
client->event.error_handle->esp_tls_cert_verify_flags = 0;
esp_mqtt_dispatch_event_with_msgid(client);
return ESP_FAIL;
}
static void esp_mqtt_abort_connection(esp_mqtt_client_handle_t client)
{
MQTT_API_LOCK(client);
esp_transport_close(client->transport);
client->wait_timeout_ms = client->config->reconnect_timeout_ms;
client->reconnect_tick = platform_tick_get_ms();
client->state = MQTT_STATE_WAIT_RECONNECT;
ESP_LOGD(TAG, "Reconnect after %d ms", client->wait_timeout_ms);
client->event.event_id = MQTT_EVENT_DISCONNECTED;
client->wait_for_ping_resp = false;
esp_mqtt_dispatch_event_with_msgid(client);
MQTT_API_UNLOCK(client);
}
static bool create_client_data(esp_mqtt_client_handle_t client)
{
client->event.error_handle = calloc(1, sizeof(esp_mqtt_error_codes_t));
ESP_MEM_CHECK(TAG, client->event.error_handle, return false)
client->api_lock = xSemaphoreCreateRecursiveMutex();
ESP_MEM_CHECK(TAG, client->api_lock, return false);
client->outbox = outbox_init();
ESP_MEM_CHECK(TAG, client->outbox, return false);
client->status_bits = xEventGroupCreate();
ESP_MEM_CHECK(TAG, client->status_bits, return false);
return true;
}
esp_mqtt_client_handle_t esp_mqtt_client_init(const esp_mqtt_client_config_t *config)
{
esp_mqtt_client_handle_t client = heap_caps_calloc(1, sizeof(struct esp_mqtt_client),
#if MQTT_EVENT_QUEUE_SIZE > 1
// if supporting multiple queued events, we keep track of them
// using atomic variable, so need to make sure it won't get allocated in PSRAM
MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
#else
MALLOC_CAP_DEFAULT);
#endif
ESP_MEM_CHECK(TAG, client, return NULL);
if (!create_client_data(client)) {
goto _mqtt_init_failed;
}
if (esp_mqtt_set_config(client, config) != ESP_OK) {
goto _mqtt_init_failed;
}
#ifdef MQTT_SUPPORTED_FEATURE_EVENT_LOOP
esp_event_loop_args_t no_task_loop = {
.queue_size = MQTT_EVENT_QUEUE_SIZE,
.task_name = NULL,
};
esp_event_loop_create(&no_task_loop, &client->config->event_loop_handle);
#if MQTT_EVENT_QUEUE_SIZE > 1
atomic_init(&client->queued_events, 0);
#endif
#endif
client->keepalive_tick = platform_tick_get_ms();
client->reconnect_tick = platform_tick_get_ms();
client->refresh_connection_tick = platform_tick_get_ms();
client->wait_for_ping_resp = false;
#ifdef MQTT_PROTOCOL_5
if (esp_mqtt5_create_default_config(client) != ESP_OK) {
goto _mqtt_init_failed;
}
#endif
return client;
_mqtt_init_failed:
esp_mqtt_client_destroy(client);
return NULL;
}
esp_err_t esp_mqtt_client_destroy(esp_mqtt_client_handle_t client)
{
if (client == NULL) {
return ESP_ERR_INVALID_ARG;
}
if (client->run) {
esp_mqtt_client_stop(client);
}
esp_mqtt_destroy_config(client);
if (client->transport_list) {
esp_transport_list_destroy(client->transport_list);
}
if (client->outbox) {
outbox_destroy(client->outbox);
}
if (client->status_bits) {
vEventGroupDelete(client->status_bits);
}
if (client->api_lock) {
vSemaphoreDelete(client->api_lock);
}
free(client->event.error_handle);
free(client);
return ESP_OK;
}
static char *create_string(const char *ptr, int len)
{
char *ret;
if (len <= 0) {
return NULL;
}
ret = calloc(1, len + 1);
ESP_MEM_CHECK(TAG, ret, return NULL);
memcpy(ret, ptr, len);
return ret;
}
esp_err_t esp_mqtt_client_set_uri(esp_mqtt_client_handle_t client, const char *uri)
{
struct http_parser_url puri;
http_parser_url_init(&puri);
int parser_status = http_parser_parse_url(uri, strlen(uri), 0, &puri);
if (parser_status != 0) {
ESP_LOGE(TAG, "Error parse uri = %s", uri);
return ESP_FAIL;
}
// This API could be also executed when client is active (need to protect config fields)
MQTT_API_LOCK(client);
// set uri overrides actual scheme, host, path if configured previously
// False-positive leak detection. TODO: GCC-366
#pragma GCC diagnostic push // TODO: IDF-10105
#if __clang__
#pragma clang diagnostic ignored "-Wunknown-warning-option"
#else
#pragma GCC diagnostic ignored "-Wpragmas"
#endif
#pragma GCC diagnostic ignored "-Wanalyzer-malloc-leak"
free(client->config->scheme);
free(client->config->host);
free(client->config->path);
client->config->scheme = create_string(uri + puri.field_data[UF_SCHEMA].off, puri.field_data[UF_SCHEMA].len);
client->config->host = create_string(uri + puri.field_data[UF_HOST].off, puri.field_data[UF_HOST].len);
client->config->path = NULL;
#pragma GCC diagnostic pop
if (puri.field_data[UF_PATH].len || puri.field_data[UF_QUERY].len) {
int asprintf_ret_value;
if (puri.field_data[UF_QUERY].len == 0) {
asprintf_ret_value = asprintf(&client->config->path,
"%.*s",
puri.field_data[UF_PATH].len, uri + puri.field_data[UF_PATH].off);
} else if (puri.field_data[UF_PATH].len == 0) {
asprintf_ret_value = asprintf(&client->config->path,
"/?%.*s",
puri.field_data[UF_QUERY].len, uri + puri.field_data[UF_QUERY].off);
} else {
asprintf_ret_value = asprintf(&client->config->path,
"%.*s?%.*s",
puri.field_data[UF_PATH].len, uri + puri.field_data[UF_PATH].off,
puri.field_data[UF_QUERY].len, uri + puri.field_data[UF_QUERY].off);
}
if (asprintf_ret_value == -1) {
ESP_LOGE(TAG,"%s(%d): %s", __FUNCTION__, __LINE__, "Memory exhausted");
MQTT_API_UNLOCK(client);
return ESP_ERR_NO_MEM;
}
}
if (puri.field_data[UF_PORT].len) {
client->config->port = strtol((const char *)(uri + puri.field_data[UF_PORT].off), NULL, 10);
}
char *user_info = create_string(uri + puri.field_data[UF_USERINFO].off, puri.field_data[UF_USERINFO].len);
if (user_info) {
char *pass = strchr(user_info, ':');
if (pass) {
pass[0] = 0; //terminal username
pass ++;
client->mqtt_state.connection.information.password = strdup(pass);
}
client->mqtt_state.connection.information.username = strdup(user_info);
free(user_info);