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esp_mqtt/mqtt/mqtt_server.c

924 wiersze
33 KiB
C
Czysty Wina Historia

#include "user_interface.h"
#include "mem.h"
#include "mqtt_server.h"
#include "mqtt_topics.h"
#include "mqtt_topiclist.h"
#include "mqtt_retainedlist.h"
#include "debug.h"
/* Mem Debug
#undef os_free
#define os_free(x) {os_printf("F:%d-> %x\r\n", __LINE__,(x));vPortFree(x, "", 0);}
int my_os_zalloc(int len, int line) {
int _v = pvPortZalloc(len, "", 0);
os_printf("A:%d-> %x (%d)\r\n", line, _v, len);
return _v;
}
#undef os_zalloc
#define os_zalloc(x) my_os_zalloc(x, __LINE__)
#undef os_malloc
#define os_malloc(x) my_os_zalloc(x, __LINE__)
*/
#define MAX_SUBS_PER_REQ 16
#define MQTT_SERVER_TASK_PRIO 1
#define MQTT_TASK_QUEUE_SIZE 1
#define MQTT_SEND_TIMOUT 5
os_event_t mqtt_procServerTaskQueue[MQTT_TASK_QUEUE_SIZE];
LOCAL uint8_t zero_len_id[2] = { 0, 0 };
MQTT_ClientCon *clientcon_list;
LOCAL MqttDataCallback local_data_cb = NULL;
LOCAL MqttConnectCallback local_connect_cb = NULL;
LOCAL MqttAuthCallback local_auth_cb = NULL;
//#undef MQTT_INFO
//#define MQTT_INFO os_printf
#define MQTT_WARNING os_printf
#define MQTT_ERROR os_printf
bool ICACHE_FLASH_ATTR print_topic(topic_entry * topic, void *user_data) {
if (topic->clientcon == LOCAL_MQTT_CLIENT) {
MQTT_INFO("MQTT: Client: LOCAL Topic: \"%s\" QoS: %d\r\n", topic->topic, topic->qos);
} else {
MQTT_INFO("MQTT: Client: %s Topic: \"%s\" QoS: %d\r\n", topic->clientcon->connect_info.client_id, topic->topic,
topic->qos);
}
return false;
}
bool ICACHE_FLASH_ATTR publish_topic(topic_entry * topic_e, uint8_t * topic, uint8_t * data, uint16_t data_len) {
MQTT_ClientCon *clientcon = topic_e->clientcon;
uint16_t message_id = 0;
if (topic_e->clientcon == LOCAL_MQTT_CLIENT) {
MQTT_INFO("MQTT: Client: LOCAL Topic: \"%s\" QoS: %d\r\n", topic_e->topic, topic_e->qos);
if (local_data_cb != NULL)
local_data_cb(NULL, topic, os_strlen(topic), data, data_len);
return true;
}
MQTT_INFO("MQTT: Client: %s Topic: \"%s\" QoS: %d\r\n", clientcon->connect_info.client_id, topic_e->topic,
topic_e->qos);
clientcon->mqtt_state.outbound_message =
mqtt_msg_publish(&clientcon->mqtt_state.mqtt_connection, topic, data, data_len, topic_e->qos, 0, &message_id);
if (QUEUE_Puts
(&clientcon->msgQueue, clientcon->mqtt_state.outbound_message->data,
clientcon->mqtt_state.outbound_message->length) == -1) {
MQTT_ERROR("MQTT: Queue full\r\n");
return false;
}
return true;
}
bool ICACHE_FLASH_ATTR publish_retainedtopic(retained_entry * entry, void* user_data) {
uint16_t message_id = 0;
MQTT_ClientCon *clientcon = (MQTT_ClientCon *)user_data;
MQTT_INFO("MQTT: Client: %s Topic: \"%s\" QoS: %d\r\n", clientcon->connect_info.client_id, entry->topic,
entry->qos);
clientcon->mqtt_state.outbound_message =
mqtt_msg_publish(&clientcon->mqtt_state.mqtt_connection, entry->topic, entry->data, entry->data_len, entry->qos,
1, &message_id);
if (QUEUE_Puts
(&clientcon->msgQueue, clientcon->mqtt_state.outbound_message->data,
clientcon->mqtt_state.outbound_message->length) == -1) {
MQTT_ERROR("MQTT: Queue full\r\n");
return false;
}
return true;
}
bool ICACHE_FLASH_ATTR delete_client_by_id(const uint8_t *id) {
MQTT_ClientCon *clientcon = clientcon_list;
for (clientcon = clientcon_list; clientcon != NULL; clientcon = clientcon->next) {
if (os_strcmp(id, clientcon->connect_info.client_id) == 0) {
MQTT_INFO("MQTT: Disconnect client: %s\r\n", clientcon->connect_info.client_id);
clientcon->connState = TCP_DISCONNECT;
system_os_post(MQTT_SERVER_TASK_PRIO, 0, (os_param_t) clientcon);
return true;
}
}
return true;
}
bool ICACHE_FLASH_ATTR activate_next_client() {
MQTT_ClientCon *clientcon = clientcon_list;
for (clientcon = clientcon_list; clientcon != NULL; clientcon = clientcon->next) {
if (!QUEUE_IsEmpty(&clientcon->msgQueue)) {
MQTT_INFO("MQTT: Next message to client: %s\r\n", clientcon->connect_info.client_id);
system_os_post(MQTT_SERVER_TASK_PRIO, 0, (os_param_t) clientcon);
return true;
}
}
return true;
}
static uint8_t shared_out_buffer[MQTT_BUF_SIZE];
bool ICACHE_FLASH_ATTR MQTT_InitClientCon(MQTT_ClientCon * mqttClientCon) {
uint32_t temp;
MQTT_INFO("MQTT:InitClientCon\r\n");
mqttClientCon->connState = TCP_CONNECTED;
os_memset(&mqttClientCon->connect_info, 0, sizeof(mqtt_connect_info_t));
mqttClientCon->connect_info.client_id = zero_len_id;
mqttClientCon->protocolVersion = 0;
mqttClientCon->mqtt_state.in_buffer = (uint8_t *) os_zalloc(MQTT_BUF_SIZE);
mqttClientCon->mqtt_state.in_buffer_length = MQTT_BUF_SIZE;
// mqttClientCon->mqtt_state.out_buffer = (uint8_t *) os_zalloc(MQTT_BUF_SIZE);
mqttClientCon->mqtt_state.out_buffer = shared_out_buffer;
mqttClientCon->mqtt_state.out_buffer_length = MQTT_BUF_SIZE;
mqttClientCon->mqtt_state.connect_info = &mqttClientCon->connect_info;
mqtt_msg_init(&mqttClientCon->mqtt_state.mqtt_connection, mqttClientCon->mqtt_state.out_buffer,
mqttClientCon->mqtt_state.out_buffer_length);
QUEUE_Init(&mqttClientCon->msgQueue, QUEUE_BUFFER_SIZE);
mqttClientCon->next = clientcon_list;
clientcon_list = mqttClientCon;
return true;
}
bool ICACHE_FLASH_ATTR MQTT_DeleteClientCon(MQTT_ClientCon * mqttClientCon) {
MQTT_INFO("MQTT:DeleteClientCon\r\n");
if (mqttClientCon == NULL)
return;
os_timer_disarm(&mqttClientCon->mqttTimer);
if (mqttClientCon->pCon != NULL) {
espconn_delete(mqttClientCon->pCon);
}
MQTT_ClientCon **p = &clientcon_list;
while (*p != mqttClientCon && *p != NULL) {
p = &((*p)->next);
}
if (*p == mqttClientCon)
*p = (*p)->next;
if (mqttClientCon->user_data != NULL) {
os_free(mqttClientCon->user_data);
mqttClientCon->user_data = NULL;
}
if (mqttClientCon->mqtt_state.in_buffer != NULL) {
os_free(mqttClientCon->mqtt_state.in_buffer);
mqttClientCon->mqtt_state.in_buffer = NULL;
}
/* We use one static buffer for all connections
// if (mqttClientCon->mqtt_state.out_buffer != NULL) {
// os_free(mqttClientCon->mqtt_state.out_buffer);
// mqttClientCon->mqtt_state.out_buffer = NULL;
// }
if (mqttClientCon->mqtt_state.outbound_message != NULL) {
if (mqttClientCon->mqtt_state.outbound_message->data != NULL) {
// Don't think, this is has ever been allocated separately
// os_free(mqttClientCon->mqtt_state.outbound_message->data);
mqttClientCon->mqtt_state.outbound_message->data = NULL;
}
}
*/
if (mqttClientCon->mqtt_state.mqtt_connection.buffer != NULL) {
// Already freed but not NULL
mqttClientCon->mqtt_state.mqtt_connection.buffer = NULL;
}
if (mqttClientCon->connect_info.client_id != NULL) {
/* Don't attempt to free if it's the zero_len array */
if (((uint8_t *) mqttClientCon->connect_info.client_id) != zero_len_id)
os_free(mqttClientCon->connect_info.client_id);
mqttClientCon->connect_info.client_id = NULL;
}
if (mqttClientCon->connect_info.username != NULL) {
os_free(mqttClientCon->connect_info.username);
mqttClientCon->connect_info.username = NULL;
}
if (mqttClientCon->connect_info.password != NULL) {
os_free(mqttClientCon->connect_info.password);
mqttClientCon->connect_info.password = NULL;
}
if (mqttClientCon->connect_info.will_topic != NULL) {
// Publish the LWT
find_topic(mqttClientCon->connect_info.will_topic, publish_topic,
mqttClientCon->connect_info.will_data, mqttClientCon->connect_info.will_data_len);
activate_next_client();
if (mqttClientCon->connect_info.will_retain) {
update_retainedtopic(mqttClientCon->connect_info.will_topic, mqttClientCon->connect_info.will_data,
mqttClientCon->connect_info.will_data_len, mqttClientCon->connect_info.will_qos);
}
os_free(mqttClientCon->connect_info.will_topic);
mqttClientCon->connect_info.will_topic = NULL;
}
if (mqttClientCon->connect_info.will_data != NULL) {
os_free(mqttClientCon->connect_info.will_data);
mqttClientCon->connect_info.will_data = NULL;
}
if (mqttClientCon->msgQueue.buf != NULL) {
os_free(mqttClientCon->msgQueue.buf);
mqttClientCon->msgQueue.buf = NULL;
}
delete_topic(mqttClientCon, 0);
os_free(mqttClientCon);
return true;
}
void ICACHE_FLASH_ATTR MQTT_ServerDisconnect(MQTT_ClientCon * mqttClientCon) {
MQTT_INFO("MQTT:ServerDisconnect\r\n");
mqttClientCon->mqtt_state.message_length_read = 0;
mqttClientCon->connState = TCP_DISCONNECT;
system_os_post(MQTT_SERVER_TASK_PRIO, 0, (os_param_t) mqttClientCon);
os_timer_disarm(&mqttClientCon->mqttTimer);
}
void ICACHE_FLASH_ATTR mqtt_server_timer(void *arg) {
MQTT_ClientCon *clientcon = (MQTT_ClientCon *) arg;
if (clientcon->sendTimeout > 0)
clientcon->sendTimeout--;
}
static void ICACHE_FLASH_ATTR MQTT_ClientCon_recv_cb(void *arg, char *pdata, unsigned short len) {
uint8_t msg_type;
uint8_t msg_qos;
uint16_t msg_id;
enum mqtt_connect_flag msg_conn_ret;
uint16_t topic_index;
uint16_t topic_len;
uint8_t *topic_str;
uint8_t topic_buffer[MQTT_BUF_SIZE];
uint16_t data_len;
uint8_t *data;
struct espconn *pCon = (struct espconn *)arg;
MQTT_INFO("MQTT_ClientCon_recv_cb(): %d bytes of data received\n", len);
MQTT_ClientCon *clientcon = (MQTT_ClientCon *) pCon->reverse;
if (clientcon == NULL) {
MQTT_ERROR("ERROR: No client status\r\n");
return;
}
MQTT_INFO("MQTT: TCP: data received %d bytes (State: %d)\r\n", len, clientcon->connState);
// Expect minimum the full fixed size header
if (len + clientcon->mqtt_state.message_length_read > MQTT_BUF_SIZE || len < 2) {
MQTT_ERROR("MQTT: Message too short/long\r\n");
clientcon->mqtt_state.message_length_read = 0;
return;
}
READPACKET:
os_memcpy(&clientcon->mqtt_state.in_buffer[clientcon->mqtt_state.message_length_read], pdata, len);
clientcon->mqtt_state.message_length_read += len;
clientcon->mqtt_state.message_length =
mqtt_get_total_length(clientcon->mqtt_state.in_buffer, clientcon->mqtt_state.message_length_read);
MQTT_INFO("MQTT: total_len: %d\r\n", clientcon->mqtt_state.message_length);
if (clientcon->mqtt_state.message_length > clientcon->mqtt_state.message_length_read) {
MQTT_WARNING("MQTT: Partial message received\r\n");
return;
}
msg_type = mqtt_get_type(clientcon->mqtt_state.in_buffer);
MQTT_INFO("MQTT: message_type: %d\r\n", msg_type);
//msg_qos = mqtt_get_qos(clientcon->mqtt_state.in_buffer);
switch (clientcon->connState) {
case TCP_CONNECTED:
switch (msg_type) {
case MQTT_MSG_TYPE_CONNECT:
MQTT_INFO("MQTT: Connect received, message_len: %d\r\n", clientcon->mqtt_state.message_length);
if (clientcon->mqtt_state.message_length < sizeof(struct mqtt_connect_variable_header) + 3) {
MQTT_ERROR("MQTT: Too short Connect message\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
struct mqtt_connect_variable_header4 *variable_header =
(struct mqtt_connect_variable_header4 *)&clientcon->mqtt_state.in_buffer[2];
uint16_t var_header_len = sizeof(struct mqtt_connect_variable_header4);
// We check MQTT v3.11 (version 4)
if ((variable_header->lengthMsb << 8) + variable_header->lengthLsb == 4 &&
variable_header->version == 4 && os_strncmp(variable_header->magic, "MQTT", 4) == 0) {
clientcon->protocolVersion = 4;
} else {
struct mqtt_connect_variable_header3 *variable_header3 =
(struct mqtt_connect_variable_header3 *)&clientcon->mqtt_state.in_buffer[2];
var_header_len = sizeof(struct mqtt_connect_variable_header3);
// We check MQTT v3.1 (version 3)
if ((variable_header3->lengthMsb << 8) + variable_header3->lengthLsb == 6 &&
variable_header3->version == 3 && os_strncmp(variable_header3->magic, "MQIsdp", 6) == 0) {
clientcon->protocolVersion = 3;
// adapt the remaining header fields (dirty as we overlay the two structs of different length)
variable_header->version = variable_header3->version;
variable_header->flags = variable_header3->flags;
variable_header->keepaliveMsb = variable_header3->keepaliveMsb;
variable_header->keepaliveLsb = variable_header3->keepaliveLsb;
} else {
// Neither found
MQTT_WARNING("MQTT: Wrong protocoll version\r\n");
msg_conn_ret = CONNECTION_REFUSE_PROTOCOL;
clientcon->connState = TCP_DISCONNECTING;
break;
}
}
uint16_t msg_used_len = var_header_len;
MQTT_INFO("MQTT: Connect flags %x\r\n", variable_header->flags);
clientcon->connect_info.clean_session = (variable_header->flags & MQTT_CONNECT_FLAG_CLEAN_SESSION) != 0;
clientcon->connect_info.keepalive = (variable_header->keepaliveMsb << 8) + variable_header->keepaliveLsb;
espconn_regist_time(clientcon->pCon, 2 * clientcon->connect_info.keepalive, 1);
MQTT_INFO("MQTT: Keepalive %d\r\n", clientcon->connect_info.keepalive);
// Get the client id
uint16_t id_len = clientcon->mqtt_state.message_length - (2 + msg_used_len);
const char *client_id = mqtt_get_str(&clientcon->mqtt_state.in_buffer[2 + msg_used_len], &id_len);
if (client_id == NULL || id_len > 80) {
MQTT_WARNING("MQTT: Client Id invalid\r\n");
msg_conn_ret = CONNECTION_REFUSE_ID_REJECTED;
clientcon->connState = TCP_DISCONNECTING;
break;
}
if (id_len == 0) {
if (clientcon->protocolVersion == 3) {
MQTT_WARNING("MQTT: Empty client Id in MQTT 3.1\r\n");
msg_conn_ret = CONNECTION_REFUSE_ID_REJECTED;
clientcon->connState = TCP_DISCONNECTING;
break;
}
if (!clientcon->connect_info.clean_session) {
MQTT_WARNING("MQTT: Null client Id and NOT cleansession\r\n");
msg_conn_ret = CONNECTION_REFUSE_ID_REJECTED;
clientcon->connState = TCP_DISCONNECTING;
break;
}
clientcon->connect_info.client_id = zero_len_id;
} else {
uint8_t *new_id = (char *)os_zalloc(id_len + 1);
if (new_id == NULL) {
MQTT_ERROR("MQTT: Out of mem\r\n");
msg_conn_ret = CONNECTION_REFUSE_SERVER_UNAVAILABLE;
clientcon->connState = TCP_DISCONNECTING;
break;
}
os_memcpy(new_id, client_id, id_len);
new_id[id_len] = '\0';
// Delete any existing status for that id
delete_client_by_id(client_id);
clientcon->connect_info.client_id = new_id;
MQTT_INFO("MQTT: Client id %s\r\n", clientcon->connect_info.client_id);
}
msg_used_len += 2 + id_len;
// Get the LWT
clientcon->connect_info.will_retain = (variable_header->flags & MQTT_CONNECT_FLAG_WILL_RETAIN) != 0;
clientcon->connect_info.will_qos = (variable_header->flags & 0x18) >> 3;
if (!(variable_header->flags & MQTT_CONNECT_FLAG_WILL)) {
// Must be all 0 if no lwt is given
if (clientcon->connect_info.will_retain || clientcon->connect_info.will_qos) {
MQTT_WARNING("MQTT: Last Will flags invalid\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
} else {
uint16_t lw_topic_len = clientcon->mqtt_state.message_length - (2 + msg_used_len);
const char *lw_topic =
mqtt_get_str(&clientcon->mqtt_state.in_buffer[2 + msg_used_len], &lw_topic_len);
if (lw_topic == NULL) {
MQTT_WARNING("MQTT: Last Will topic invalid\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
clientcon->connect_info.will_topic = (char *)os_zalloc(lw_topic_len + 1);
if (clientcon->connect_info.will_topic != NULL) {
os_memcpy(clientcon->connect_info.will_topic, lw_topic, lw_topic_len);
clientcon->connect_info.will_topic[lw_topic_len] = 0;
if (Topics_hasWildcards(clientcon->connect_info.will_topic)) {
MQTT_WARNING("MQTT: Last Will topic has wildcards\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
MQTT_INFO("MQTT: LWT topic %s\r\n", clientcon->connect_info.will_topic);
} else {
MQTT_ERROR("MQTT: Out of mem\r\n");
msg_conn_ret = CONNECTION_REFUSE_SERVER_UNAVAILABLE;
clientcon->connState = TCP_DISCONNECTING;
break;
}
msg_used_len += 2 + lw_topic_len;
uint16_t lw_data_len =
clientcon->mqtt_state.message_length - (2 + msg_used_len);
const char *lw_data =
mqtt_get_str(&clientcon->mqtt_state.in_buffer[2 + msg_used_len],
&lw_data_len);
if (lw_data == NULL) {
MQTT_WARNING("MQTT: Last Will data invalid\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
clientcon->connect_info.will_data = (char *)os_zalloc(lw_data_len);
clientcon->connect_info.will_data_len = lw_data_len;
if (clientcon->connect_info.will_data != NULL) {
os_memcpy(clientcon->connect_info.will_data, lw_data, lw_data_len);
MQTT_INFO("MQTT: %d bytes of LWT data\r\n", clientcon->connect_info.will_data_len);
} else {
MQTT_ERROR("MQTT: Out of mem\r\n");
msg_conn_ret = CONNECTION_REFUSE_SERVER_UNAVAILABLE;
clientcon->connState = TCP_DISCONNECTING;
break;
}
msg_used_len += 2 + lw_data_len;
}
// Get the username
if ((variable_header->flags & MQTT_CONNECT_FLAG_USERNAME) != 0) {
uint16_t username_len = clientcon->mqtt_state.message_length - (2 + msg_used_len);
const char *username =
mqtt_get_str(&clientcon->mqtt_state.in_buffer[2 + msg_used_len], &username_len);
if (username == NULL) {
MQTT_WARNING("MQTT: Username invalid\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
clientcon->connect_info.username = (char *)os_zalloc(username_len+1);
if (clientcon->connect_info.username != NULL) {
os_memcpy(clientcon->connect_info.username, username, username_len);
clientcon->connect_info.username[username_len] = '\0';
MQTT_INFO("MQTT: Username %s\r\n", clientcon->connect_info.username);
} else {
MQTT_ERROR("MQTT: Out of mem\r\n");
msg_conn_ret = CONNECTION_REFUSE_SERVER_UNAVAILABLE;
clientcon->connState = TCP_DISCONNECTING;
break;
}
msg_used_len += 2 + username_len;
}
// Get the password
if ((variable_header->flags & MQTT_CONNECT_FLAG_PASSWORD) != 0) {
if ((variable_header->flags & MQTT_CONNECT_FLAG_USERNAME) == 0) {
MQTT_WARNING("MQTT: Password without username\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
uint16_t password_len = clientcon->mqtt_state.message_length - (2 + msg_used_len);
const char *password =
mqtt_get_str(&clientcon->mqtt_state.in_buffer[2 + msg_used_len], &password_len);
if (password != NULL)
clientcon->connect_info.password = (char *)os_zalloc(password_len+1);
if (clientcon->connect_info.password != NULL) {
os_memcpy(clientcon->connect_info.password, password, password_len);
clientcon->connect_info.password[password_len] = '\0';
MQTT_INFO("MQTT: Password %s\r\n", clientcon->connect_info.password);
} else {
MQTT_ERROR("MQTT: Out of mem\r\n");
msg_conn_ret = CONNECTION_REFUSE_SERVER_UNAVAILABLE;
clientcon->connState = TCP_DISCONNECTING;
break;
}
msg_used_len += 2 + password_len;
}
// Check Auth
if ((local_auth_cb != NULL) &&
local_auth_cb(clientcon->connect_info.username==NULL?"":clientcon->connect_info.username,
clientcon->connect_info.password==NULL?"":clientcon->connect_info.password,
clientcon->pCon) == false) {
MQTT_WARNING("MQTT: Authorization failed\r\n");
if (clientcon->connect_info.will_topic != NULL) {
os_free(clientcon->connect_info.will_topic);
clientcon->connect_info.will_topic = NULL;
}
msg_conn_ret = CONNECTION_REFUSE_NOT_AUTHORIZED;
clientcon->connState = TCP_DISCONNECTING;
break;
}
msg_conn_ret = CONNECTION_ACCEPTED;
clientcon->connState = MQTT_DATA;
break;
default:
MQTT_WARNING("MQTT: Invalid message\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
clientcon->mqtt_state.outbound_message = mqtt_msg_connack(&clientcon->mqtt_state.mqtt_connection, msg_conn_ret);
if (QUEUE_Puts
(&clientcon->msgQueue, clientcon->mqtt_state.outbound_message->data,
clientcon->mqtt_state.outbound_message->length) == -1) {
MQTT_ERROR("MQTT: Queue full\r\n");
}
break;
case MQTT_DATA:
switch (msg_type) {
uint8_t ret_codes[MAX_SUBS_PER_REQ];
uint8_t num_subs;
case MQTT_MSG_TYPE_SUBSCRIBE:
MQTT_INFO("MQTT: Subscribe received, message_len: %d\r\n", clientcon->mqtt_state.message_length);
// 2B fixed header + 2B variable header + 2 len + 1 char + 1 QoS
if (clientcon->mqtt_state.message_length < 8) {
MQTT_ERROR("MQTT: Too short Subscribe message\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
msg_id = mqtt_get_id(clientcon->mqtt_state.in_buffer, clientcon->mqtt_state.in_buffer_length);
MQTT_INFO("MQTT: Message id %d\r\n", msg_id);
topic_index = 4;
num_subs = 0;
while (topic_index < clientcon->mqtt_state.message_length && num_subs < MAX_SUBS_PER_REQ) {
topic_len = clientcon->mqtt_state.message_length - topic_index;
topic_str = mqtt_get_str(&clientcon->mqtt_state.in_buffer[topic_index], &topic_len);
if (topic_str == NULL) {
MQTT_WARNING("MQTT: Subscribe topic invalid\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
topic_index += 2 + topic_len;
if (topic_index >= clientcon->mqtt_state.message_length) {
MQTT_WARNING("MQTT: Subscribe QoS missing\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
uint8_t topic_QoS = clientcon->mqtt_state.in_buffer[topic_index++];
os_memcpy(topic_buffer, topic_str, topic_len);
topic_buffer[topic_len] = 0;
MQTT_INFO("MQTT: Subscribed topic %s QoS %d\r\n", topic_buffer, topic_QoS);
// the return codes, one per topic
// For now we always give back error or QoS = 0 !!
ret_codes[num_subs++] = add_topic(clientcon, topic_buffer, 0) ? 0 : 0x80;
//iterate_topics(print_topic, 0);
}
MQTT_INFO("MQTT: Subscribe successful\r\n");
clientcon->mqtt_state.outbound_message =
mqtt_msg_suback(&clientcon->mqtt_state.mqtt_connection, ret_codes, num_subs, msg_id);
if (QUEUE_Puts
(&clientcon->msgQueue, clientcon->mqtt_state.outbound_message->data,
clientcon->mqtt_state.outbound_message->length) == -1) {
MQTT_ERROR("MQTT: Queue full\r\n");
}
find_retainedtopic(topic_buffer, publish_retainedtopic, clientcon);
break;
case MQTT_MSG_TYPE_UNSUBSCRIBE:
MQTT_INFO("MQTT: Unsubscribe received, message_len: %d\r\n", clientcon->mqtt_state.message_length);
// 2B fixed header + 2B variable header + 2 len + 1 char
if (clientcon->mqtt_state.message_length < 7) {
MQTT_ERROR("MQTT: Too short Unsubscribe message\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
msg_id = mqtt_get_id(clientcon->mqtt_state.in_buffer, clientcon->mqtt_state.in_buffer_length);
MQTT_INFO("MQTT: Message id %d\r\n", msg_id);
topic_index = 4;
while (topic_index < clientcon->mqtt_state.message_length) {
uint16_t topic_len = clientcon->mqtt_state.message_length - topic_index;
char *topic_str = mqtt_get_str(&clientcon->mqtt_state.in_buffer[topic_index], &topic_len);
if (topic_str == NULL) {
MQTT_WARNING("MQTT: Subscribe topic invalid\r\n");
MQTT_ServerDisconnect(clientcon);
return;
}
topic_index += 2 + topic_len;
os_memcpy(topic_buffer, topic_str, topic_len);
topic_buffer[topic_len] = 0;
MQTT_INFO("MQTT: Unsubscribed topic %s\r\n", topic_buffer);
delete_topic(clientcon, topic_buffer);
//iterate_topics(print_topic, 0);
}
MQTT_INFO("MQTT: Unubscribe successful\r\n");
clientcon->mqtt_state.outbound_message = mqtt_msg_unsuback(&clientcon->mqtt_state.mqtt_connection, msg_id);
if (QUEUE_Puts
(&clientcon->msgQueue, clientcon->mqtt_state.outbound_message->data,
clientcon->mqtt_state.outbound_message->length) == -1) {
MQTT_ERROR("MQTT: Queue full\r\n");
}
break;
case MQTT_MSG_TYPE_PUBLISH:
MQTT_INFO("MQTT: Publish received, message_len: %d\r\n", clientcon->mqtt_state.message_length);
/* if (msg_qos == 1)
clientcon->mqtt_state.outbound_message = mqtt_msg_puback(&clientcon->mqtt_state.mqtt_connection, msg_id);
else if (msg_qos == 2)
clientcon->mqtt_state.outbound_message = mqtt_msg_pubrec(&clientcon->mqtt_state.mqtt_connection, msg_id);
if (msg_qos == 1 || msg_qos == 2) {
MQTT_INFO("MQTT: Queue response QoS: %d\r\n", msg_qos);
if (QUEUE_Puts(&clientcon->msgQueue, clientcon->mqtt_state.outbound_message->data, clientcon->mqtt_state.outbound_message->length) == -1) {
MQTT_ERROR("MQTT: Queue full\r\n");
}
}
*/
topic_len = clientcon->mqtt_state.in_buffer_length;
topic_str = (uint8_t *) mqtt_get_publish_topic(clientcon->mqtt_state.in_buffer, &topic_len);
os_memcpy(topic_buffer, topic_str, topic_len);
topic_buffer[topic_len] = 0;
data_len = clientcon->mqtt_state.in_buffer_length;
data = (uint8_t *) mqtt_get_publish_data(clientcon->mqtt_state.in_buffer, &data_len);
MQTT_INFO("MQTT: Published topic \"%s\"\r\n", topic_buffer);
MQTT_INFO("MQTT: Matches to:\r\n");
// Now find, if anything matches and enque publish message
find_topic(topic_buffer, publish_topic, data, data_len);
if (mqtt_get_retain(clientcon->mqtt_state.in_buffer)) {
update_retainedtopic(topic_buffer, data, data_len, mqtt_get_qos(clientcon->mqtt_state.in_buffer));
}
break;
case MQTT_MSG_TYPE_PINGREQ:
MQTT_INFO("MQTT: receive MQTT_MSG_TYPE_PINGREQ\r\n");
clientcon->mqtt_state.outbound_message = mqtt_msg_pingresp(&clientcon->mqtt_state.mqtt_connection);
if (QUEUE_Puts
(&clientcon->msgQueue, clientcon->mqtt_state.outbound_message->data,
clientcon->mqtt_state.outbound_message->length) == -1) {
MQTT_ERROR("MQTT: Queue full\r\n");
}
break;
case MQTT_MSG_TYPE_DISCONNECT:
MQTT_INFO("MQTT: receive MQTT_MSG_TYPE_DISCONNECT\r\n");
// Clean session close: no LWT
if (clientcon->connect_info.will_topic != NULL) {
os_free(clientcon->connect_info.will_topic);
clientcon->connect_info.will_topic = NULL;
}
MQTT_ServerDisconnect(clientcon);
return;
/*
case MQTT_MSG_TYPE_PUBACK:
if (clientcon->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_PUBLISH && clientcon->mqtt_state.pending_msg_id == msg_id) {
MQTT_INFO("MQTT: received MQTT_MSG_TYPE_PUBACK, finish QoS1 publish\r\n");
}
break;
case MQTT_MSG_TYPE_PUBREC:
clientcon->mqtt_state.outbound_message = mqtt_msg_pubrel(&clientcon->mqtt_state.mqtt_connection, msg_id);
if (QUEUE_Puts(&clientcon->msgQueue, clientcon->mqtt_state.outbound_message->data, clientcon->mqtt_state.outbound_message->length) == -1) {
MQTT_ERROR("MQTT: Queue full\r\n");
}
break;
case MQTT_MSG_TYPE_PUBREL:
clientcon->mqtt_state.outbound_message = mqtt_msg_pubcomp(&clientcon->mqtt_state.mqtt_connection, msg_id);
if (QUEUE_Puts(&clientcon->msgQueue, clientcon->mqtt_state.outbound_message->data, clientcon->mqtt_state.outbound_message->length) == -1) {
MQTT_ERROR("MQTT: Queue full\r\n");
}
break;
case MQTT_MSG_TYPE_PUBCOMP:
if (clientcon->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_PUBLISH && clientcon->mqtt_state.pending_msg_id == msg_id) {
MQTT_INFO("MQTT: receive MQTT_MSG_TYPE_PUBCOMP, finish QoS2 publish\r\n");
}
break;
case MQTT_MSG_TYPE_PINGRESP:
// Ignore
break;
*/
default:
// Ignore
break;
}
break;
}
// More than one MQTT command in the packet?
len = clientcon->mqtt_state.message_length_read;
if (clientcon->mqtt_state.message_length < len) {
len -= clientcon->mqtt_state.message_length;
pdata += clientcon->mqtt_state.message_length;
clientcon->mqtt_state.message_length_read = 0;
MQTT_INFO("MQTT: Get another received message\r\n");
goto READPACKET;
}
clientcon->mqtt_state.message_length_read = 0;
if (msg_type != MQTT_MSG_TYPE_PUBLISH) {
system_os_post(MQTT_SERVER_TASK_PRIO, 0, (os_param_t) clientcon);
} else {
activate_next_client();
}
}
/* Called when a client has disconnected from the MQTT server */
static void ICACHE_FLASH_ATTR MQTT_ClientCon_discon_cb(void *arg) {
struct espconn *pCon = (struct espconn *)arg;
MQTT_ClientCon *clientcon = (MQTT_ClientCon *) pCon->reverse;
MQTT_INFO("MQTT_ClientCon_discon_cb(): client disconnected\n");
MQTT_DeleteClientCon(clientcon);
}
static void ICACHE_FLASH_ATTR MQTT_ClientCon_sent_cb(void *arg) {
struct espconn *pCon = (struct espconn *)arg;
MQTT_ClientCon *clientcon = (MQTT_ClientCon *) pCon->reverse;
MQTT_INFO("MQTT_ClientCon_sent_cb(): Data sent\n");
clientcon->sendTimeout = 0;
if (clientcon->connState == TCP_DISCONNECTING) {
clientcon->connState = TCP_DISCONNECT;
system_os_post(MQTT_SERVER_TASK_PRIO, 0, (os_param_t) clientcon);
}
activate_next_client();
}
/* Called when a client connects to the MQTT server */
static void ICACHE_FLASH_ATTR MQTT_ClientCon_connected_cb(void *arg) {
struct espconn *pespconn = (struct espconn *)arg;
MQTT_ClientCon *mqttClientCon;
pespconn->reverse = NULL;
MQTT_INFO("MQTT_ClientCon_connected_cb(): Client connected\r\n");
espconn_regist_sentcb(pespconn, MQTT_ClientCon_sent_cb);
espconn_regist_disconcb(pespconn, MQTT_ClientCon_discon_cb);
espconn_regist_recvcb(pespconn, MQTT_ClientCon_recv_cb);
espconn_regist_time(pespconn, 30, 1);
mqttClientCon = (MQTT_ClientCon *) os_zalloc(sizeof(MQTT_ClientCon));
pespconn->reverse = mqttClientCon;
if (mqttClientCon == NULL) {
MQTT_ERROR("ERROR: Cannot allocate client status\r\n");
return;
}
MQTT_InitClientCon(mqttClientCon);
mqttClientCon->pCon = pespconn;
os_timer_setfn(&mqttClientCon->mqttTimer, (os_timer_func_t *) mqtt_server_timer, mqttClientCon);
os_timer_arm(&mqttClientCon->mqttTimer, 1000, 1);
if (local_connect_cb != NULL && local_connect_cb(pespconn) == false) {
mqttClientCon->connState = TCP_DISCONNECT;
system_os_post(MQTT_SERVER_TASK_PRIO, 0, (os_param_t) mqttClientCon);
return;
}
}
void ICACHE_FLASH_ATTR MQTT_ServerTask(os_event_t * e) {
MQTT_ClientCon *clientcon = (MQTT_ClientCon *) e->par;
uint8_t dataBuffer[MQTT_BUF_SIZE];
uint16_t dataLen;
if (e->par == 0)
return;
MQTT_INFO("MQTT: Server task activated - state %d\r\n", clientcon->connState);
switch (clientcon->connState) {
case TCP_DISCONNECT:
MQTT_INFO("MQTT: Disconnect\r\n");
espconn_disconnect(clientcon->pCon);
break;
case TCP_DISCONNECTING:
case MQTT_DATA:
if (!QUEUE_IsEmpty(&clientcon->msgQueue) && clientcon->sendTimeout == 0 &&
QUEUE_Gets(&clientcon->msgQueue, dataBuffer, &dataLen, MQTT_BUF_SIZE) == 0) {
clientcon->mqtt_state.pending_msg_type = mqtt_get_type(dataBuffer);
clientcon->mqtt_state.pending_msg_id = mqtt_get_id(dataBuffer, dataLen);
clientcon->sendTimeout = MQTT_SEND_TIMOUT;
MQTT_INFO("MQTT: Sending, type: %d, id: %04X\r\n", clientcon->mqtt_state.pending_msg_type,
clientcon->mqtt_state.pending_msg_id);
espconn_send(clientcon->pCon, dataBuffer, dataLen);
clientcon->mqtt_state.outbound_message = NULL;
break;
}
if (clientcon->connState == TCP_DISCONNECTING) {
MQTT_ServerDisconnect(clientcon);
}
break;
}
}
bool ICACHE_FLASH_ATTR MQTT_server_start(uint16_t portno, uint16_t max_subscriptions, uint16_t max_retained_topics) {
MQTT_INFO("Starting MQTT server on port %d\r\n", portno);
if (!create_topiclist(max_subscriptions))
return false;
if (!create_retainedlist(max_retained_topics))
return false;
clientcon_list = NULL;
struct espconn *pCon = (struct espconn *)os_zalloc(sizeof(struct espconn));
if (pCon == NULL)
return false;
/* Equivalent to bind */
pCon->type = ESPCONN_TCP;
pCon->state = ESPCONN_NONE;
pCon->proto.tcp = (esp_tcp *) os_zalloc(sizeof(esp_tcp));
if (pCon->proto.tcp == NULL) {
os_free(pCon);
return false;
}
pCon->proto.tcp->local_port = portno;
/* Register callback when clients connect to the server */
espconn_regist_connectcb(pCon, MQTT_ClientCon_connected_cb);
/* Put the connection in accept mode */
espconn_accept(pCon);
system_os_task(MQTT_ServerTask, MQTT_SERVER_TASK_PRIO, mqtt_procServerTaskQueue, MQTT_TASK_QUEUE_SIZE);
return true;
}
bool ICACHE_FLASH_ATTR MQTT_local_publish(uint8_t * topic, uint8_t * data, uint16_t data_length, uint8_t qos,
uint8_t retain) {
find_topic(topic, publish_topic, data, data_length);
if (retain)
update_retainedtopic(topic, data, data_length, qos);
activate_next_client();
return true;
}
bool ICACHE_FLASH_ATTR MQTT_local_subscribe(uint8_t * topic, uint8_t qos) {
return add_topic(LOCAL_MQTT_CLIENT, topic, 0);
}
bool ICACHE_FLASH_ATTR MQTT_local_unsubscribe(uint8_t * topic) {
return delete_topic(LOCAL_MQTT_CLIENT, topic);
}
void ICACHE_FLASH_ATTR MQTT_server_onData(MqttDataCallback dataCb) {
local_data_cb = dataCb;
}
void ICACHE_FLASH_ATTR MQTT_server_onConnect(MqttConnectCallback connectCb) {
local_connect_cb = connectCb;
}
void ICACHE_FLASH_ATTR MQTT_server_onAuth(MqttAuthCallback authCb) {
local_auth_cb = authCb;
}
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