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#include <string.h>
#include "mqtt5_msg.h"
#include "mqtt_client.h"
#include "mqtt_config.h"
#include "platform.h"
#include "esp_log.h"
#define MQTT5_MAX_FIXED_HEADER_SIZE 5
static const char *TAG = "mqtt5_msg";
#define APPEND_CHECK(a, ret) if(a == -1) { \
ESP_LOGE(TAG,"%s(%d) fail",__FUNCTION__, __LINE__); \
return (ret); \
}
#define MQTT5_SHARED_SUB "$share/%s/%s"
#define MQTT5_CONVERT_ONE_BYTE_TO_FOUR(i, a, b, c, d) i = (a << 24); \
i |= (b << 16); \
i |= (c << 8); \
i |= d;
#define MQTT5_CONVERT_ONE_BYTE_TO_TWO(i, a, b) i = (a << 8); \
i |= b;
#define MQTT5_CONVERT_TWO_BYTE(i, a) i = (a >> 8) & 0xff; \
i = a & 0xff;
enum mqtt5_connect_flag {
MQTT5_CONNECT_FLAG_USERNAME = 1 << 7,
MQTT5_CONNECT_FLAG_PASSWORD = 1 << 6,
MQTT5_CONNECT_FLAG_WILL_RETAIN = 1 << 5,
MQTT5_CONNECT_FLAG_WILL = 1 << 2,
MQTT5_CONNECT_FLAG_CLEAN_SESSION = 1 << 1
};
static void generate_variable_len(size_t len, uint8_t *len_bytes, uint8_t *encoded_lens)
{
uint8_t bytes = 0;
do {
uint8_t i = len % 128;
len /= 128;
if (len > 0) {
i |= 0x80;
}
encoded_lens[bytes ++] = i;
} while (len > 0);
*len_bytes = bytes;
}
static size_t get_variable_len(uint8_t *buffer, size_t offset, size_t buffer_length, uint8_t *len_bytes)
{
*len_bytes = 0;
size_t len = 0, i = 0;
for (i = offset; i < buffer_length; i ++) {
len += (buffer[i] & 0x7f) << (7 * (i - offset));
if ((buffer[i] & 0x80) == 0) {
i ++;
break;
}
}
*len_bytes = i - offset;
return len;
}
static int update_property_len_value(mqtt_connection_t *connection, size_t property_len, int property_offset)
{
uint8_t encoded_lens[4] = {0}, len_bytes = 0;
size_t len = property_len, message_offset = property_offset + property_len;
generate_variable_len(len, &len_bytes, encoded_lens);
int offset = len_bytes - 1;
connection->outbound_message.length += offset;
if (connection->outbound_message.length > connection->buffer_length) {
return -1;
}
if (offset > 0) {
for (int i = 0; i < property_len; i ++) {
connection->buffer[message_offset + offset] = connection->buffer[message_offset];
message_offset --;
}
}
for (int i = 0; i < len_bytes; i ++) {
connection->buffer[property_offset ++] = encoded_lens[i];
}
return offset;
}
static int append_property(mqtt_connection_t *connection, uint8_t property_type, uint8_t len_occupy, const char *data, size_t data_len)
{
if ((connection->outbound_message.length + len_occupy + (data ? data_len : 0) + (property_type ? 1 : 0)) > connection->buffer_length) {
return -1;
}
size_t origin_message_len = connection->outbound_message.length;
if (property_type) {
connection->buffer[connection->outbound_message.length ++] = property_type;
}
if (len_occupy == 0) {
uint8_t encoded_lens[4] = {0}, len_bytes = 0;
generate_variable_len(data_len, &len_bytes, encoded_lens);
for (int j = 0; j < len_bytes; j ++) {
connection->buffer[connection->outbound_message.length ++] = encoded_lens[j];
}
} else {
for (int i = 1; i <= len_occupy; i ++) {
connection->buffer[connection->outbound_message.length ++] = (data_len >> (8 * (len_occupy - i))) & 0xff;
}
}
if (data) {
memcpy(connection->buffer + connection->outbound_message.length, data, data_len);
connection->outbound_message.length += data_len;
}
return connection->outbound_message.length - origin_message_len;
}
static uint16_t append_message_id(mqtt_connection_t *connection, uint16_t message_id)
{
// If message_id is zero then we should assign one, otherwise
// we'll use the one supplied by the caller
while (message_id == 0) {
#if MQTT_MSG_ID_INCREMENTAL
message_id = ++ connection->last_message_id;
#else
message_id = platform_random(65535);
#endif
}
if (connection->outbound_message.length + 2 > connection->buffer_length) {
return 0;
}
MQTT5_CONVERT_TWO_BYTE(connection->buffer[connection->outbound_message.length ++], message_id)
return message_id;
}
static int init_message(mqtt_connection_t *connection)
{
connection->outbound_message.length = MQTT5_MAX_FIXED_HEADER_SIZE;
return MQTT5_MAX_FIXED_HEADER_SIZE;
}
static mqtt_message_t *fail_message(mqtt_connection_t *connection)
{
connection->outbound_message.data = connection->buffer;
connection->outbound_message.length = 0;
return &connection->outbound_message;
}
static mqtt_message_t *fini_message(mqtt_connection_t *connection, int type, int dup, int qos, int retain)
{
int message_length = connection->outbound_message.length - MQTT5_MAX_FIXED_HEADER_SIZE;
int total_length = message_length;
uint8_t encoded_lens[4] = {0}, len_bytes = 0;
// Check if we have fragmented message and update total_len
if (connection->outbound_message.fragmented_msg_total_length) {
total_length = connection->outbound_message.fragmented_msg_total_length - MQTT5_MAX_FIXED_HEADER_SIZE;
}
// Encode MQTT message length
generate_variable_len(total_length, &len_bytes, encoded_lens);
// Sanity check for MQTT header
if (len_bytes + 1 > MQTT5_MAX_FIXED_HEADER_SIZE) {
return fail_message(connection);
}
// Save the header bytes
connection->outbound_message.length = message_length + len_bytes + 1; // msg len + encoded_size len + type (1 byte)
int offs = MQTT5_MAX_FIXED_HEADER_SIZE - 1 - len_bytes;
connection->outbound_message.data = connection->buffer + offs;
connection->outbound_message.fragmented_msg_data_offset -= offs;
// type byte
connection->buffer[offs ++] = ((type & 0x0f) << 4) | ((dup & 1) << 3) | ((qos & 3) << 1) | (retain & 1);
// length bytes
for (int j = 0; j < len_bytes; j ++) {
connection->buffer[offs ++] = encoded_lens[j];
}
return &connection->outbound_message;
}
static esp_err_t mqtt5_msg_set_user_property(mqtt5_user_property_handle_t *user_property, char *key, size_t key_len, char *value, size_t value_len)
{
if (!*user_property) {
*user_property = calloc(1, sizeof(struct mqtt5_user_property_list_t));
ESP_MEM_CHECK(TAG, *user_property, return ESP_FAIL);
STAILQ_INIT(*user_property);
}
mqtt5_user_property_item_t user_property_item = calloc(1, sizeof(mqtt5_user_property_t));
ESP_MEM_CHECK(TAG, user_property_item, return ESP_FAIL;);
user_property_item->key = calloc(1, key_len + 1);
ESP_MEM_CHECK(TAG, user_property_item->key, {
free(user_property_item);
return ESP_FAIL;
});
memcpy(user_property_item->key, key, key_len);
user_property_item->key[key_len] = '\0';
user_property_item->value = calloc(1, value_len + 1);
ESP_MEM_CHECK(TAG, user_property_item->value, {
free(user_property_item->key);
free(user_property_item);
return ESP_FAIL;
});
memcpy(user_property_item->value, value, value_len);
user_property_item->value[value_len] = '\0';
STAILQ_INSERT_TAIL(*user_property, user_property_item, next);
return ESP_OK;
}
static mqtt5_user_property_handle_t mqtt5_msg_get_user_property(uint8_t *buffer, size_t buffer_length)
{
mqtt5_user_property_handle_t user_porperty = NULL;
uint8_t *property = buffer;
uint16_t property_offset = 0, len = 0;
while (property_offset < buffer_length) {
uint8_t property_id = property[property_offset ++];
switch (property_id) {
case MQTT5_PROPERTY_REASON_STRING: //only print now
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_REASON_STRING %.*s", len, &property[property_offset]);
property_offset += len;
continue;
case MQTT5_PROPERTY_USER_PROPERTY: {
uint8_t *key = NULL, *value = NULL;
size_t key_len = 0, value_len = 0;
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
key = &property[property_offset];
key_len = len;
ESP_LOGD(TAG, "MQTT5_PROPERTY_USER_PROPERTY key: %.*s", key_len, (char *)key);
property_offset += len;
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
value = &property[property_offset];
value_len = len;
ESP_LOGD(TAG, "MQTT5_PROPERTY_USER_PROPERTY value: %.*s", value_len, (char *)value);
property_offset += len;
if (mqtt5_msg_set_user_property(&user_porperty, (char *)key, key_len, (char *)value, value_len) != ESP_OK) {
ESP_LOGE(TAG, "mqtt5_msg_set_user_property fail");
goto err;
}
continue;
}
default:
ESP_LOGW(TAG, "Unknow property id 0x%02x", property_id);
goto err;
}
}
return user_porperty;
err:
esp_mqtt5_client_delete_user_property(user_porperty);
return NULL;
}
uint16_t mqtt5_get_id(uint8_t *buffer, size_t length)
{
int topiclen = 0;
uint8_t len_bytes = 0;
size_t offset = 1;
size_t totlen = get_variable_len(buffer, offset, length, &len_bytes);
offset += len_bytes;
totlen += offset;
if (offset + 2 > length) {
return 0;
}
switch (mqtt5_get_type(buffer)) {
case MQTT_MSG_TYPE_PUBLISH: {
MQTT5_CONVERT_ONE_BYTE_TO_TWO(topiclen, buffer[offset++], buffer[offset++])
offset += topiclen;
if (offset + 2 > length) {
return 0;
}
if (mqtt_get_qos(buffer) == 0) {
return 0;
}
return (buffer[offset] << 8) | buffer[offset + 1];
}
case MQTT_MSG_TYPE_PUBACK:
case MQTT_MSG_TYPE_PUBREC:
case MQTT_MSG_TYPE_PUBREL:
case MQTT_MSG_TYPE_PUBCOMP:
case MQTT_MSG_TYPE_SUBACK:
case MQTT_MSG_TYPE_UNSUBACK:
case MQTT_MSG_TYPE_SUBSCRIBE:
case MQTT_MSG_TYPE_UNSUBSCRIBE: {
return (buffer[offset] << 8) | buffer[offset + 1];
}
default:
return 0;
}
}
char *mqtt5_get_publish_property_payload(uint8_t *buffer, size_t buffer_length, char **msg_topic, size_t *msg_topic_len, esp_mqtt5_publish_resp_property_t *resp_property, uint16_t *property_len, size_t *payload_len, mqtt5_user_property_handle_t *user_property)
{
*user_property = NULL;
uint8_t len_bytes = 0;
size_t offset = 1;
size_t totlen = get_variable_len(buffer, offset, buffer_length, &len_bytes);
offset += len_bytes;
totlen += offset;
size_t topic_len = buffer[offset ++] << 8;
topic_len |= buffer[offset ++] & 0xff;
*msg_topic = (char *)(buffer + offset);
*msg_topic_len = topic_len;
offset += topic_len;
if (offset >= buffer_length) {
return NULL;
}
if (mqtt5_get_qos(buffer) > 0) {
if (offset + 2 >= buffer_length) {
return NULL;
}
offset += 2; // skip the message id
}
*property_len = get_variable_len(buffer, offset, buffer_length, &len_bytes);
offset += len_bytes;
uint16_t len = 0, property_offset = 0;
uint8_t *property = (buffer + offset);
while (property_offset < *property_len) {
uint8_t property_id = property[property_offset ++];
switch (property_id) {
case MQTT5_PROPERTY_PAYLOAD_FORMAT_INDICATOR:
resp_property->payload_format_indicator = property[property_offset ++];
ESP_LOGD(TAG, "MQTT5_PROPERTY_PAYLOAD_FORMAT_INDICATOR %d", resp_property->payload_format_indicator);
continue;
case MQTT5_PROPERTY_MESSAGE_EXPIRY_INTERVAL:
MQTT5_CONVERT_ONE_BYTE_TO_FOUR(resp_property->message_expiry_interval, property[property_offset ++], property[property_offset ++], property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_MESSAGE_EXPIRY_INTERVAL %"PRIu32, resp_property->message_expiry_interval);
continue;
case MQTT5_PROPERTY_TOPIC_ALIAS:
MQTT5_CONVERT_ONE_BYTE_TO_TWO(resp_property->topic_alias, property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_TOPIC_ALIAS %d", resp_property->topic_alias);
continue;
case MQTT5_PROPERTY_RESPONSE_TOPIC:
MQTT5_CONVERT_ONE_BYTE_TO_TWO(resp_property->response_topic_len, property[property_offset ++], property[property_offset ++])
resp_property->response_topic = (char *)(property + property_offset);
property_offset += resp_property->response_topic_len;
ESP_LOGD(TAG, "MQTT5_PROPERTY_RESPONSE_TOPIC %.*s", resp_property->response_topic_len, resp_property->response_topic);
continue;
case MQTT5_PROPERTY_CORRELATION_DATA:
MQTT5_CONVERT_ONE_BYTE_TO_TWO(resp_property->correlation_data_len, property[property_offset ++], property[property_offset ++])
resp_property->correlation_data = (char *)(property + property_offset);
property_offset += resp_property->correlation_data_len;
ESP_LOGD(TAG, "MQTT5_PROPERTY_CORRELATION_DATA length %d", resp_property->correlation_data_len);
continue;
case MQTT5_PROPERTY_SUBSCRIBE_IDENTIFIER:
resp_property->subscribe_id = get_variable_len(property, property_offset, buffer_length, &len_bytes);
property_offset += len_bytes;
ESP_LOGD(TAG, "MQTT5_PROPERTY_SUBSCRIBE_IDENTIFIER %d", resp_property->subscribe_id);
continue;
case MQTT5_PROPERTY_CONTENT_TYPE:
MQTT5_CONVERT_ONE_BYTE_TO_TWO(resp_property->content_type_len, property[property_offset ++], property[property_offset ++])
resp_property->content_type = (char *)(property + property_offset);
property_offset += resp_property->content_type_len;
ESP_LOGD(TAG, "MQTT5_PROPERTY_CONTENT_TYPE %.*s", resp_property->content_type_len, resp_property->content_type);
continue;
case MQTT5_PROPERTY_USER_PROPERTY: {
uint8_t *key = NULL, *value = NULL;
size_t key_len = 0, value_len = 0;
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
key = &property[property_offset];
key_len = len;
ESP_LOGD(TAG, "MQTT5_PROPERTY_USER_PROPERTY key: %.*s", key_len, (char *)key);
property_offset += len;
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
value = &property[property_offset];
value_len = len;
ESP_LOGD(TAG, "MQTT5_PROPERTY_USER_PROPERTY value: %.*s", value_len, (char *)value);
property_offset += len;
if (mqtt5_msg_set_user_property(user_property, (char *)key, key_len, (char *)value, value_len) != ESP_OK) {
esp_mqtt5_client_delete_user_property(*user_property);
*user_property = NULL;
ESP_LOGE(TAG, "mqtt5_msg_set_user_property fail");
return NULL;
}
continue;
}
case MQTT5_PROPERTY_REASON_STRING: //only print now
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_REASON_STRING %.*s", len, &property[property_offset]);
property_offset += len;
continue;
default:
ESP_LOGW(TAG, "Unknow publish property id 0x%02x", property_id);
return NULL;
}
}
offset += property_offset;
if (totlen <= buffer_length) {
*payload_len = totlen - offset;
} else {
*payload_len = buffer_length - offset;
}
return (char *)(buffer + offset);
}
char *mqtt5_get_suback_data(uint8_t *buffer, size_t *length, mqtt5_user_property_handle_t *user_property)
{
uint8_t len_bytes = 0;
size_t offset = 1;
size_t totlen = get_variable_len(buffer, offset, *length, &len_bytes);
offset += len_bytes;
totlen += offset;
if (totlen > *length) {
goto err;
}
offset += 2; // skip the message id
if (offset < totlen) {
size_t property_len = get_variable_len(buffer, offset, totlen, &len_bytes);
offset += len_bytes;
*user_property = mqtt5_msg_get_user_property(buffer + offset, property_len);
offset += property_len;
if (offset < totlen) {
*length = totlen - offset;
return (char *)(buffer + offset);
}
}
err:
*user_property = NULL;
*length = 0;
return NULL;
}
char *mqtt5_get_puback_data(uint8_t *buffer, size_t *length, mqtt5_user_property_handle_t *user_property)
{
uint8_t len_bytes = 0;
size_t offset = 1;
size_t totlen = get_variable_len(buffer, offset, *length, &len_bytes);
offset += len_bytes;
totlen += offset;
offset += 2; // skip the message id
if (offset < totlen) {
*length = 1;
char *data = (char *)(buffer + offset);
offset ++;
if (offset < totlen) {
size_t property_len = get_variable_len(buffer, offset, totlen, &len_bytes);
offset += len_bytes;
*user_property = mqtt5_msg_get_user_property(buffer + offset, property_len);
}
return data;
} else {
*length = 0;
return NULL;
}
}
mqtt_message_t *mqtt5_msg_connect(mqtt_connection_t *connection, mqtt_connect_info_t *info, esp_mqtt5_connection_property_storage_t *property, esp_mqtt5_connection_will_property_storage_t *will_property)
{
init_message(connection);
connection->buffer[connection->outbound_message.length ++] = 0; // Variable header length MSB
/* Defaults to protocol version 5 values */
connection->buffer[connection->outbound_message.length ++] = 4; // Variable header length LSB
memcpy(&connection->buffer[connection->outbound_message.length], "MQTT", 4); // Protocol name
connection->outbound_message.length += 4;
connection->buffer[connection->outbound_message.length ++] = 5; // Protocol version
int flags_offset = connection->outbound_message.length;
connection->buffer[connection->outbound_message.length ++] = 0; // Flags
MQTT5_CONVERT_TWO_BYTE(connection->buffer[connection->outbound_message.length ++], info->keepalive) // Keep-alive
if (info->clean_session) {
connection->buffer[flags_offset] |= MQTT5_CONNECT_FLAG_CLEAN_SESSION;
}
//Add properties
int properties_offset = connection->outbound_message.length;
connection->outbound_message.length ++;
if (property->session_expiry_interval) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_SESSION_EXPIRY_INTERVAL, 4, NULL, property->session_expiry_interval), fail_message(connection));
}
if (property->maximum_packet_size) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_MAXIMUM_PACKET_SIZE, 4, NULL, property->maximum_packet_size), fail_message(connection));
}
if (property->receive_maximum) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_RECEIVE_MAXIMUM, 2, NULL, property->receive_maximum), fail_message(connection));
}
if (property->topic_alias_maximum) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_TOPIC_ALIAS_MAXIMIM, 2, NULL, property->topic_alias_maximum), fail_message(connection));
}
if (property->request_resp_info) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_REQUEST_RESP_INFO, 1, NULL, 1), fail_message(connection));
}
if (property->request_problem_info) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_REQUEST_PROBLEM_INFO, 1, NULL, 1), fail_message(connection));
}
if (property->user_property) {
mqtt5_user_property_item_t item;
STAILQ_FOREACH(item, property->user_property, next) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_USER_PROPERTY, 2, item->key, strlen(item->key)), fail_message(connection));
APPEND_CHECK(append_property(connection, 0, 2, item->value, strlen(item->value)), fail_message(connection));
}
}
APPEND_CHECK(update_property_len_value(connection, connection->outbound_message.length - properties_offset - 1, properties_offset), fail_message(connection));
if (info->client_id != NULL && info->client_id[0] != '\0') {
APPEND_CHECK(append_property(connection, 0, 2, info->client_id, strlen(info->client_id)), fail_message(connection));
} else {
APPEND_CHECK(append_property(connection, 0, 2, NULL, 0), fail_message(connection));
}
//Add will properties
if (info->will_topic != NULL && info->will_topic[0] != '\0') {
properties_offset = connection->outbound_message.length;
connection->outbound_message.length ++;
if (will_property->will_delay_interval) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_WILL_DELAY_INTERVAL, 4, NULL, will_property->will_delay_interval), fail_message(connection));
}
if (will_property->payload_format_indicator) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_PAYLOAD_FORMAT_INDICATOR, 1, NULL, 1), fail_message(connection));
}
if (will_property->message_expiry_interval) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_MESSAGE_EXPIRY_INTERVAL, 4, NULL, will_property->message_expiry_interval), fail_message(connection));
}
if (will_property->content_type) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_CONTENT_TYPE, 2, will_property->content_type, strlen(will_property->content_type)), fail_message(connection));
}
if (will_property->response_topic) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_RESPONSE_TOPIC, 2, will_property->response_topic, strlen(will_property->response_topic)), fail_message(connection));
}
if (will_property->correlation_data && will_property->correlation_data_len) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_CORRELATION_DATA, 2, will_property->correlation_data, will_property->correlation_data_len), fail_message(connection));
}
if (will_property->user_property) {
mqtt5_user_property_item_t item;
STAILQ_FOREACH(item, will_property->user_property, next) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_USER_PROPERTY, 2, item->key, strlen(item->key)), fail_message(connection));
APPEND_CHECK(append_property(connection, 0, 2, item->value, strlen(item->value)), fail_message(connection));
}
}
APPEND_CHECK(update_property_len_value(connection, connection->outbound_message.length - properties_offset - 1, properties_offset), fail_message(connection));
APPEND_CHECK(append_property(connection, 0, 2, info->will_topic, strlen(info->will_topic)), fail_message(connection));
APPEND_CHECK(append_property(connection, 0, 2, info->will_message, info->will_length), fail_message(connection));
connection->buffer[flags_offset] |= MQTT5_CONNECT_FLAG_WILL;
if (info->will_retain) {
connection->buffer[flags_offset] |= MQTT5_CONNECT_FLAG_WILL_RETAIN;
}
connection->buffer[flags_offset] |= (info->will_qos & 3) << 3;
}
if (info->username != NULL && info->username[0] != '\0') {
APPEND_CHECK(append_property(connection, 0, 2, info->username, strlen(info->username)), fail_message(connection));
connection->buffer[flags_offset] |= MQTT5_CONNECT_FLAG_USERNAME;
}
if (info->password != NULL && info->password[0] != '\0') {
if (info->username == NULL || info->username[0] == '\0') {
/* In case if password is set without username, we need to set a zero length username.
* (otherwise we violate: MQTT-3.1.2-22: If the User Name Flag is set to 0 then the Password Flag MUST be set to 0.)
*/
APPEND_CHECK(append_property(connection, 0, 2, NULL, 0), fail_message(connection));
connection->buffer[flags_offset] |= MQTT5_CONNECT_FLAG_USERNAME;
}
APPEND_CHECK(append_property(connection, 0, 2, info->password, strlen(info->password)), fail_message(connection));
connection->buffer[flags_offset] |= MQTT5_CONNECT_FLAG_PASSWORD;
}
return fini_message(connection, MQTT_MSG_TYPE_CONNECT, 0, 0, 0);
}
esp_err_t mqtt5_msg_parse_connack_property(uint8_t *buffer, size_t buffer_len, mqtt_connect_info_t *connection_info, esp_mqtt5_connection_property_storage_t *connection_property, esp_mqtt5_connection_server_resp_property_t *resp_property, int *reason_code, uint8_t *ack_flag, mqtt5_user_property_handle_t *user_property)
{
*reason_code = 0;
*user_property = NULL;
uint8_t len_bytes = 0;
size_t offset = 1;
size_t totlen = get_variable_len(buffer, offset, buffer_len, &len_bytes);
offset += len_bytes;
totlen += offset;
if (totlen > buffer_len) {
ESP_LOGE(TAG, "Total length %d is over read len %d", totlen, buffer_len);
return ESP_FAIL;
}
*ack_flag = buffer[offset ++]; //acknowledge flags
*reason_code = buffer[offset ++]; //reason code
size_t property_len = get_variable_len(buffer, offset, buffer_len, &len_bytes);
offset += len_bytes;
uint16_t property_offset = 0, len = 0;
uint8_t *property = (buffer + offset);
while (property_offset < property_len) {
uint8_t property_id = property[property_offset ++];
switch (property_id) {
case MQTT5_PROPERTY_SESSION_EXPIRY_INTERVAL:
MQTT5_CONVERT_ONE_BYTE_TO_FOUR(connection_property->session_expiry_interval, property[property_offset ++], property[property_offset ++], property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_SESSION_EXPIRY_INTERVAL %"PRIu32, connection_property->session_expiry_interval);
continue;
case MQTT5_PROPERTY_RECEIVE_MAXIMUM:
MQTT5_CONVERT_ONE_BYTE_TO_TWO(resp_property->receive_maximum, property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_RECEIVE_MAXIMUM %d", resp_property->receive_maximum);
continue;
case MQTT5_PROPERTY_MAXIMUM_QOS:
resp_property->max_qos = property[property_offset ++];
ESP_LOGD(TAG, "MQTT5_PROPERTY_MAXIMUM_QOS %d", resp_property->max_qos);
continue;
case MQTT5_PROPERTY_RETAIN_AVAILABLE:
resp_property->retain_available = property[property_offset ++];
ESP_LOGD(TAG, "MQTT5_PROPERTY_RETAIN_AVAILABLE %d", resp_property->retain_available);
continue;
case MQTT5_PROPERTY_MAXIMUM_PACKET_SIZE:
MQTT5_CONVERT_ONE_BYTE_TO_FOUR(resp_property->maximum_packet_size, property[property_offset ++], property[property_offset ++], property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_MAXIMUM_PACKET_SIZE %"PRIu32, resp_property->maximum_packet_size);
continue;
case MQTT5_PROPERTY_ASSIGNED_CLIENT_IDENTIFIER:
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
if (connection_info->client_id) {
free(connection_info->client_id);
}
connection_info->client_id = calloc(1, len + 1);
if (!connection_info->client_id) {
ESP_LOGE(TAG, "Failed to calloc %d data", len);
return ESP_FAIL;
}
memcpy(connection_info->client_id, &property[property_offset], len);
connection_info->client_id[len] = '\0';
property_offset += len;
ESP_LOGD(TAG, "MQTT5_PROPERTY_ASSIGNED_CLIENT_IDENTIFIER %s", connection_info->client_id);
continue;
case MQTT5_PROPERTY_TOPIC_ALIAS_MAXIMIM:
MQTT5_CONVERT_ONE_BYTE_TO_TWO(resp_property->topic_alias_maximum, property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_TOPIC_ALIAS_MAXIMIM %d", resp_property->topic_alias_maximum);
continue;
case MQTT5_PROPERTY_REASON_STRING: //only print now
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_REASON_STRING %.*s", len, &property[property_offset]);
property_offset += len;
continue;
case MQTT5_PROPERTY_USER_PROPERTY: {
uint8_t *key = NULL, *value = NULL;
size_t key_len = 0, value_len = 0;
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
key = &property[property_offset];
key_len = len;
ESP_LOGD(TAG, "MQTT5_PROPERTY_USER_PROPERTY key: %.*s", key_len, (char *)key);
property_offset += len;
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
value = &property[property_offset];
value_len = len;
ESP_LOGD(TAG, "MQTT5_PROPERTY_USER_PROPERTY value: %.*s", value_len, (char *)value);
property_offset += len;
if (mqtt5_msg_set_user_property(user_property, (char *)key, key_len, (char *)value, value_len) != ESP_OK) {
esp_mqtt5_client_delete_user_property(*user_property);
*user_property = NULL;
ESP_LOGE(TAG, "mqtt5_msg_set_user_property fail");
return ESP_FAIL;
}
continue;
}
case MQTT5_PROPERTY_WILDCARD_SUBSCR_AVAILABLE:
resp_property->wildcard_subscribe_available = property[property_offset++];
ESP_LOGD(TAG, "MQTT5_PROPERTY_WILDCARD_SUBSCR_AVAILABLE %d", resp_property->wildcard_subscribe_available);
continue;
case MQTT5_PROPERTY_SUBSCR_IDENTIFIER_AVAILABLE:
resp_property->subscribe_identifiers_available = property[property_offset++];
ESP_LOGD(TAG, "MQTT5_PROPERTY_SUBSCR_IDENTIFIER_AVAILABLE %d", resp_property->subscribe_identifiers_available);
continue;
case MQTT5_PROPERTY_SHARED_SUBSCR_AVAILABLE:
resp_property->shared_subscribe_available = property[property_offset++];
ESP_LOGD(TAG, "MQTT5_PROPERTY_SHARED_SUBSCR_AVAILABLE %d", resp_property->shared_subscribe_available);
continue;
case MQTT5_PROPERTY_SERVER_KEEP_ALIVE:
MQTT5_CONVERT_ONE_BYTE_TO_TWO(connection_info->keepalive, property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_SERVER_KEEP_ALIVE %lld", connection_info->keepalive);
continue;
case MQTT5_PROPERTY_RESP_INFO:
if (resp_property->response_info) {
free(resp_property->response_info);
}
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
resp_property->response_info = calloc(1, len + 1);
if (!resp_property->response_info) {
ESP_LOGE(TAG, "Failed to calloc %d data", len);
return ESP_FAIL;
}
memcpy(resp_property->response_info, &property[property_offset], len);
resp_property->response_info[len] = '\0';
property_offset += len;
ESP_LOGD(TAG, "MQTT5_PROPERTY_RESP_INFO %s", resp_property->response_info);
continue;
case MQTT5_PROPERTY_SERVER_REFERENCE: //only print now
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_SERVER_REFERENCE %.*s", len, &property[property_offset]);
property_offset += len;
continue;
case MQTT5_PROPERTY_AUTHENTICATION_METHOD: //only print now
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_AUTHENTICATION_METHOD %.*s", len, &property[property_offset]);
property_offset += len;
continue;
case MQTT5_PROPERTY_AUTHENTICATION_DATA: //only print now
MQTT5_CONVERT_ONE_BYTE_TO_TWO(len, property[property_offset ++], property[property_offset ++])
ESP_LOGD(TAG, "MQTT5_PROPERTY_AUTHENTICATION_DATA length %d", len);
property_offset += len;
continue;
default:
ESP_LOGW(TAG, "Unknow connack property id 0x%02x", property_id);
return ESP_FAIL;
}
}
return ESP_OK;
}
mqtt_message_t *mqtt5_msg_publish(mqtt_connection_t *connection, const char *topic, const char *data, int data_length, int qos, int retain, uint16_t *message_id, const esp_mqtt5_publish_property_config_t *property, const char *resp_info)
{
init_message(connection);
if ((topic == NULL || topic[0] == '\0') && (!property || !property->topic_alias)){
ESP_LOGE(TAG, "Message must have a topic filter or a topic alias set");
return fail_message(connection);
}
int topic_len = (topic == NULL || topic[0] == '\0') ? 0 : strlen(topic);
APPEND_CHECK(append_property(connection, 0, 2, topic, topic_len), fail_message(connection));
if (data == NULL && data_length > 0) {
return fail_message(connection);
}
if (qos > 0) {
if ((*message_id = append_message_id(connection, 0)) == 0) {
return fail_message(connection);
}
} else {
*message_id = 0;
}
int properties_offset = connection->outbound_message.length;
connection->outbound_message.length ++;
if (property) {
if (property->payload_format_indicator) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_PAYLOAD_FORMAT_INDICATOR, 1, NULL, 1), fail_message(connection));
}
if (property->message_expiry_interval) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_MESSAGE_EXPIRY_INTERVAL, 4, NULL, property->message_expiry_interval), fail_message(connection));
}
if (property->topic_alias) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_TOPIC_ALIAS, 2, NULL, property->topic_alias), fail_message(connection));
}
if (property->response_topic) {
if (resp_info && strlen(resp_info)) {
uint16_t response_topic_size = strlen(property->response_topic) + strlen(resp_info) + 1;
char *response_topic = calloc(1, response_topic_size);
if (!response_topic) {
ESP_LOGE(TAG, "Failed to calloc %d memory", response_topic_size);
return fail_message(connection);
}
snprintf(response_topic, response_topic_size, "%s/%s", property->response_topic, resp_info);
if (append_property(connection, MQTT5_PROPERTY_RESPONSE_TOPIC, 2, response_topic, response_topic_size) == -1) {
ESP_LOGE(TAG, "%s(%d) fail", __FUNCTION__, __LINE__);
free(response_topic);
return fail_message(connection);
}
free(response_topic);
} else {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_RESPONSE_TOPIC, 2, property->response_topic, strlen(property->response_topic)), fail_message(connection));
}
}
if (property->correlation_data && property->correlation_data_len) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_CORRELATION_DATA, 2, property->correlation_data, property->correlation_data_len), fail_message(connection));
}
if (property->user_property) {
mqtt5_user_property_item_t item;
STAILQ_FOREACH(item, property->user_property, next) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_USER_PROPERTY, 2, item->key, strlen(item->key)), fail_message(connection));
APPEND_CHECK(append_property(connection, 0, 2, item->value, strlen(item->value)), fail_message(connection));
}
}
if (property->content_type) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_CONTENT_TYPE, 2, property->content_type, strlen(property->content_type)), fail_message(connection));
}
}
APPEND_CHECK(update_property_len_value(connection, connection->outbound_message.length - properties_offset - 1, properties_offset), fail_message(connection));
if (connection->outbound_message.length + data_length > connection->buffer_length) {
// Not enough size in buffer -> fragment this message
connection->outbound_message.fragmented_msg_data_offset = connection->outbound_message.length;
memcpy(connection->buffer + connection->outbound_message.length, data, connection->buffer_length - connection->outbound_message.length);
connection->outbound_message.length = connection->buffer_length;
connection->outbound_message.fragmented_msg_total_length = data_length + connection->outbound_message.fragmented_msg_data_offset;
} else {
if (data != NULL) {
memcpy(connection->buffer + connection->outbound_message.length, data, data_length);
connection->outbound_message.length += data_length;
}
connection->outbound_message.fragmented_msg_total_length = 0;
}
return fini_message(connection, MQTT_MSG_TYPE_PUBLISH, 0, qos, retain);
}
int mqtt5_msg_get_reason_code(uint8_t *buffer, size_t length)
{
uint8_t len_bytes = 0;
size_t offset = 1; // Message type
size_t variable_len = get_variable_len(buffer, offset, length, &len_bytes);
offset += len_bytes;
switch (mqtt5_get_type(buffer)) {
case MQTT_MSG_TYPE_PUBACK:
case MQTT_MSG_TYPE_PUBREC:
case MQTT_MSG_TYPE_PUBREL:
case MQTT_MSG_TYPE_PUBCOMP:
if(variable_len == 2) {
return 0;
}
offset += 2; //skip the message id
if (offset >= length) {
ESP_LOGE(TAG, "Invalid control packet, reason code is absent");
return -1;
}
return buffer[offset];
case MQTT_MSG_TYPE_SUBACK:
case MQTT_MSG_TYPE_UNSUBACK: {
offset += 2; //skip the message id
if (offset >= length) {
return -1;
}
size_t property_len = get_variable_len(buffer, offset, length, &len_bytes);
offset = offset + len_bytes + property_len;
if (offset >= length) {
ESP_LOGE(TAG, "Invalid control packet, reason code is absent");
return -1;
}
return buffer[offset];
}
case MQTT_MSG_TYPE_DISCONNECT:
if (offset >= length) {
return -1;
} else {
return buffer[offset];
}
default:
break;
}
return -1;
}
mqtt_message_t *mqtt5_msg_subscribe(mqtt_connection_t *connection, const esp_mqtt_topic_t *topic_list, int size, uint16_t *message_id, const esp_mqtt5_subscribe_property_config_t *property)
{
init_message(connection);
if ((*message_id = append_message_id(connection, 0)) == 0) {
return fail_message(connection);
}
int properties_offset = connection->outbound_message.length;
connection->outbound_message.length ++;
if (property) {
if (property->subscribe_id) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_SUBSCRIBE_IDENTIFIER, 0, NULL, property->subscribe_id), fail_message(connection));
}
if (property->user_property) {
mqtt5_user_property_item_t item;
STAILQ_FOREACH(item, property->user_property, next) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_USER_PROPERTY, 2, item->key, strlen(item->key)), fail_message(connection));
APPEND_CHECK(append_property(connection, 0, 2, item->value, strlen(item->value)), fail_message(connection));
}
}
}
APPEND_CHECK(update_property_len_value(connection, connection->outbound_message.length - properties_offset - 1, properties_offset), fail_message(connection));
for (int topic_number = 0; topic_number < size; ++topic_number) {
if (topic_list[topic_number].filter[0] == '\0') {
return fail_message(connection);
}
if (property && property->is_share_subscribe) {
uint16_t shared_topic_size = strlen(topic_list[topic_number].filter) + strlen(MQTT5_SHARED_SUB) + strlen(property->share_name);
char *shared_topic = calloc(1, shared_topic_size);
if (!shared_topic) {
ESP_LOGE(TAG, "Failed to calloc %d memory", shared_topic_size);
fail_message(connection);
}
snprintf(shared_topic, shared_topic_size, MQTT5_SHARED_SUB, property->share_name, topic_list[topic_number].filter);
if (append_property(connection, 0, 2, shared_topic, strlen(shared_topic)) == -1) {
ESP_LOGE(TAG, "%s(%d) fail", __FUNCTION__, __LINE__);
free(shared_topic);
return fail_message(connection);
}
free(shared_topic);
} else {
APPEND_CHECK(append_property(connection, 0, 2, topic_list[topic_number].filter, strlen(topic_list[topic_number].filter)), fail_message(connection));
}
if (connection->outbound_message.length + 1 > connection->buffer_length) {
return fail_message(connection);
}
connection->buffer[connection->outbound_message.length] = 0;
if (property) {
if (property->retain_handle > 0 && property->retain_handle < 3) {
connection->buffer[connection->outbound_message.length] |= (property->retain_handle & 3) << 4;
}
if (property->no_local_flag) {
connection->buffer[connection->outbound_message.length] |= (property->no_local_flag << 2);
}
if (property->retain_as_published_flag) {
connection->buffer[connection->outbound_message.length] |= (property->retain_as_published_flag << 3);
}
}
connection->buffer[connection->outbound_message.length] |= (topic_list[topic_number].qos & 3);
connection->outbound_message.length ++;
}
return fini_message(connection, MQTT_MSG_TYPE_SUBSCRIBE, 0, 1, 0);
}
mqtt_message_t *mqtt5_msg_disconnect(mqtt_connection_t *connection, esp_mqtt5_disconnect_property_config_t *disconnect_property_info)
{
init_message(connection);
int reason_offset = connection->outbound_message.length;
connection->buffer[connection->outbound_message.length ++] = 0;
int properties_offset = connection->outbound_message.length;
connection->outbound_message.length ++;
if (disconnect_property_info) {
if (disconnect_property_info->session_expiry_interval) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_SESSION_EXPIRY_INTERVAL, 4, NULL, disconnect_property_info->session_expiry_interval), fail_message(connection));
}
if (disconnect_property_info->user_property) {
mqtt5_user_property_item_t item;
STAILQ_FOREACH(item, disconnect_property_info->user_property, next) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_USER_PROPERTY, 2, item->key, strlen(item->key)), fail_message(connection));
APPEND_CHECK(append_property(connection, 0, 2, item->value, strlen(item->value)), fail_message(connection));
}
}
if (disconnect_property_info->disconnect_reason) {
connection->buffer[reason_offset] = disconnect_property_info->disconnect_reason;
}
}
APPEND_CHECK(update_property_len_value(connection, connection->outbound_message.length - properties_offset - 1, properties_offset), fail_message(connection));
return fini_message(connection, MQTT_MSG_TYPE_DISCONNECT, 0, 0, 0);
}
mqtt_message_t *mqtt5_msg_unsubscribe(mqtt_connection_t *connection, const char *topic, uint16_t *message_id, const esp_mqtt5_unsubscribe_property_config_t *property)
{
init_message(connection);
if (topic == NULL || topic[0] == '\0') {
return fail_message(connection);
}
if ((*message_id = append_message_id(connection, 0)) == 0) {
return fail_message(connection);
}
int properties_offset = connection->outbound_message.length;
connection->outbound_message.length ++;
if (property) {
if (property->user_property) {
mqtt5_user_property_item_t item;
STAILQ_FOREACH(item, property->user_property, next) {
APPEND_CHECK(append_property(connection, MQTT5_PROPERTY_USER_PROPERTY, 2, item->key, strlen(item->key)), fail_message(connection));
APPEND_CHECK(append_property(connection, 0, 2, item->value, strlen(item->value)), fail_message(connection));
}
}
}
APPEND_CHECK(update_property_len_value(connection, connection->outbound_message.length - properties_offset - 1, properties_offset), fail_message(connection));
if (property && property->is_share_subscribe) {
uint16_t shared_topic_size = strlen(topic) + strlen(MQTT5_SHARED_SUB) + strlen(property->share_name);
char *shared_topic = calloc(1, shared_topic_size);
if (!shared_topic) {
ESP_LOGE(TAG, "Failed to calloc %d memory", shared_topic_size);
fail_message(connection);
}
snprintf(shared_topic, shared_topic_size, MQTT5_SHARED_SUB, property->share_name, topic);
if (append_property(connection, 0, 2, shared_topic, strlen(shared_topic)) == -1) {
ESP_LOGE(TAG, "%s(%d) fail", __FUNCTION__, __LINE__);
free(shared_topic);
return fail_message(connection);
}
free(shared_topic);
} else {
APPEND_CHECK(append_property(connection, 0, 2, topic, strlen(topic)), fail_message(connection));
}
return fini_message(connection, MQTT_MSG_TYPE_UNSUBSCRIBE, 0, 1, 0);
}
mqtt_message_t *mqtt5_msg_puback(mqtt_connection_t *connection, uint16_t message_id)
{
init_message(connection);
if (append_message_id(connection, message_id) == 0) {
return fail_message(connection);
}
connection->buffer[connection->outbound_message.length ++] = 0; // Regard it is success
int properties_offset = connection->outbound_message.length;
connection->outbound_message.length ++;
APPEND_CHECK(update_property_len_value(connection, connection->outbound_message.length - properties_offset - 1, properties_offset), fail_message(connection));
return fini_message(connection, MQTT_MSG_TYPE_PUBACK, 0, 0, 0);
}
mqtt_message_t *mqtt5_msg_pubrec(mqtt_connection_t *connection, uint16_t message_id)
{
init_message(connection);
if (append_message_id(connection, message_id) == 0) {
return fail_message(connection);
}
connection->buffer[connection->outbound_message.length ++] = 0; // Regard it is success
int properties_offset = connection->outbound_message.length;
connection->outbound_message.length ++;
APPEND_CHECK(update_property_len_value(connection, connection->outbound_message.length - properties_offset - 1, properties_offset), fail_message(connection));
return fini_message(connection, MQTT_MSG_TYPE_PUBREC, 0, 0, 0);
}
mqtt_message_t *mqtt5_msg_pubrel(mqtt_connection_t *connection, uint16_t message_id)
{
init_message(connection);
if (append_message_id(connection, message_id) == 0) {
return fail_message(connection);
}
connection->buffer[connection->outbound_message.length ++] = 0; // Regard it is success
int properties_offset = connection->outbound_message.length;
connection->outbound_message.length ++;
APPEND_CHECK(update_property_len_value(connection, connection->outbound_message.length - properties_offset - 1, properties_offset), fail_message(connection));
return fini_message(connection, MQTT_MSG_TYPE_PUBREL, 0, 1, 0);
}
mqtt_message_t *mqtt5_msg_pubcomp(mqtt_connection_t *connection, uint16_t message_id)
{
init_message(connection);
if (append_message_id(connection, message_id) == 0) {
return fail_message(connection);
}
connection->buffer[connection->outbound_message.length ++] = 0; // Regard it is success
int properties_offset = connection->outbound_message.length;
connection->outbound_message.length ++;
APPEND_CHECK(update_property_len_value(connection, connection->outbound_message.length - properties_offset - 1, properties_offset), fail_message(connection));
return fini_message(connection, MQTT_MSG_TYPE_PUBCOMP, 0, 0, 0);
}
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