use MQTT-C

.gitignore

@@ -46,7 +46,6 @@ html/
 /CMakeCache.txt
 /Makefile
 /*.cmake
-/deps
 /src/cq/test/CMakeFiles/cqtest.dir/*.cmake
 *.cmake
 /src/cq/test/CMakeFiles/cqtest.dir/*.make

.gitmodules

 [submodule "src/connector/go"]
 	path = src/connector/go
 	url = https://github.com/taosdata/driver-go
+[submodule "deps/MQTT-C"]
+	path = deps/MQTT-C
+	url = https://github.com/LiamBindle/MQTT-C.git
+	branch = master

deps/CMakeLists.txt

@@ -7,4 +7,4 @@ ADD_SUBDIRECTORY(regex)
 ADD_SUBDIRECTORY(iconv)
 ADD_SUBDIRECTORY(lz4)
 ADD_SUBDIRECTORY(cJson)
-ADD_SUBDIRECTORY(paho.mqtt.c)
+ADD_SUBDIRECTORY(MQTT-C)

MQTT-C @ 79c1b887

+Subproject commit 79c1b887856332fc12278e52c29532e9ebad2a8a

src/dnode/src/dnodeModule.c

@@ -20,7 +20,7 @@
 #include "trpc.h"
 #include "mnode.h"
 #include "http.h"
-#include "mqtt.h"
+#include "tmqtt.h"
 #include "monitor.h"
 #include "dnodeInt.h"
 #include "dnodeModule.h"

src/plugins/mqtt/CMakeLists.txt

@@ -8,14 +8,15 @@ IF ((TD_LINUX_64) OR (TD_LINUX_32 AND TD_ARM))
   INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/query/inc)
   INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/common/inc)
   INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/cJson/inc)
-  INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/paho.mqtt.c/inc)
+  INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/MQTT-C/include)
+  INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/MQTT-C/examples/templates)
   INCLUDE_DIRECTORIES(${TD_OS_DIR}/inc)
   INCLUDE_DIRECTORIES(inc)
   AUX_SOURCE_DIRECTORY(src SRC)
   ADD_LIBRARY(mqtt ${SRC})
-  TARGET_LINK_LIBRARIES(mqtt pahomqtt taos_static cJson)
+  TARGET_LINK_LIBRARIES(mqtt taos_static cJson mqttc)
 
   IF (TD_ADMIN)
-    TARGET_LINK_LIBRARIES(mqtt pahomqtt admin cJson)
+    TARGET_LINK_LIBRARIES(mqtt admin cJson)
   ENDIF ()
 ENDIF ()

src/plugins/mqtt/inc/mqttInit.h

@@ -19,25 +19,62 @@
 extern "C" {
 #endif
 
-#include <stdint.h>
-#include "MQTTAsync.h"
-#include "os.h"
+
+/**
+ * @file
+ * A simple subscriber program that performs automatic reconnections.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "mqtt.h"
 #include "taos.h"
-#include "tglobal.h"
-#include "tsocket.h"
-#include "ttimer.h"
-#include "tsclient.h"
-char    split(char str[], char delims[], char** p_p_cmd_part, int max);
-void    mqttConnnectLost(void* context, char* cause);
-int     mqttMessageArrived(void* context, char* topicName, int topicLen, MQTTAsync_message* message);
-void    mqttQueryInsertCallback(void* param, TAOS_RES* result, int32_t code);
-void    onDisconnectFailure(void* context, MQTTAsync_failureData* response);
-void    onDisconnect(void* context, MQTTAsync_successData* response);
-void    onSubscribe(void* context, MQTTAsync_successData* response);
-void    onSubscribeFailure(void* context, MQTTAsync_failureData* response);
-void    mqttInitConnCb(void* param, TAOS_RES* result, int32_t code);
 
+/**
+ * @brief A structure that I will use to keep track of some data needed
+ *        to setup the connection to the broker.
+ *
+ * An instance of this struct will be created in my \c main(). Then, whenever
+ * \ref mqttReconnectClient is called, this instance will be passed.
+ */
+struct reconnect_state_t {
+  const char* hostname;
+  const char* port;
+  const char* topic;
+  uint8_t*    sendbuf;
+  size_t      sendbufsz;
+  uint8_t*    recvbuf;
+  size_t      recvbufsz;
+};
+
+/**
+ * @brief My reconnect callback. It will reestablish the connection whenever
+ *        an error occurs.
+ */
+void mqttReconnectClient(struct mqtt_client* client, void** reconnect_state_vptr);
+
+/**
+ * @brief The function will be called whenever a PUBLISH message is received.
+ */
+void mqtt_PublishCallback(void** unused, struct mqtt_response_publish* published);
+
+/**
+ * @brief The client's refresher. This function triggers back-end routines to
+ *        handle ingress/egress traffic to the broker.
+ *
+ * @note All this function needs to do is call \ref __mqtt_recv and
+ *       \ref __mqtt_send every so often. I've picked 100 ms meaning that
+ *       client ingress/egress traffic will be handled every 100 ms.
+ */
+void* mqttClientRefresher(void* client);
+
+/**
+ * @brief Safelty closes the \p sockfd and cancels the \p client_daemon before \c exit.
+ */
 
+void mqttCleanup(int status, int sockfd, pthread_t* client_daemon);
+void mqttInitConnCb(void* param, TAOS_RES* result, int32_t code);
+void mqttQueryInsertCallback(void* param, TAOS_RES* result, int32_t code);
 #define CLIENTID "taos"
 #define TOPIC "/taos/+/+/+/"  // taos/<token>/<db name>/<table name>/
 #define PAYLOAD "Hello World!"

src/plugins/mqtt/src/mqttPayload.c

@@ -39,7 +39,7 @@ char* converJsonToSql(char* json, char* _dbname, char* _tablename) {
   char   _values[102400] = {0};
   int    i = 0;
   int    count = cJSON_GetArraySize(jPlayload);
-  for (; i < count; i++)  //jsonֵ
+  for (; i < count; i++)  
   {
     cJSON* item = cJSON_GetArrayItem(jPlayload, i);
     if (cJSON_Object == item->type) {
@@ -58,7 +58,8 @@ char* converJsonToSql(char* json, char* _dbname, char* _tablename) {
     }
   }
   cJSON_free(jPlayload);
-  char* _sql = calloc(0, strlen(_names) + strlen(_values) + strlen(_dbname) + strlen(_tablename) + 1024);
+  int   sqllen = strlen(_names) + strlen(_values) + strlen(_dbname) + strlen(_tablename) + 1024;
+  char* _sql = calloc(1, sqllen);
   sprintf(_sql, "INSERT INTO %s.%s (%s) VALUES(%s);", _dbname, _tablename, _names, _values);
   return _sql;
 }
\ No newline at end of file

src/plugins/mqtt/src/mqttSystem.c

@@ -14,50 +14,78 @@
  */
 
 #define _DEFAULT_SOURCE
-#include "mqttSystem.h"
-#include "MQTTAsync.h"
+
 #include "cJSON.h"
 #include "mqtt.h"
+#include "mqttInit.h"
 #include "mqttLog.h"
+#include "mqttPayload.h"
 #include "os.h"
+#include "posix_sockets.h"
 #include "string.h"
 #include "taos.h"
 #include "tglobal.h"
+#include "tmqtt.h"
 #include "tsclient.h"
 #include "tsocket.h"
 #include "ttimer.h"
-#include "mqttInit.h"
-#include "mqttPayload.h"
+#include "mqttSystem.h"
+struct mqtt_client       client;
+pthread_t                client_daemon;
+void*                    mqtt_conn;
+struct reconnect_state_t reconnect_state;
+
+int32_t mqttInitSystem() {
+  int         rc = 0;
+  const char* addr;
+  const char* port;
+  addr = tsMqttBrokerAddress;
+  port = "1883";
+  reconnect_state.hostname = addr;
+  reconnect_state.port = port;
+  reconnect_state.topic = TOPIC;
+  uint8_t sendbuf[2048];
+  uint8_t recvbuf[1024];
+  reconnect_state.sendbuf = sendbuf;
+  reconnect_state.sendbufsz = sizeof(sendbuf);
+  reconnect_state.recvbuf = recvbuf;
+  reconnect_state.recvbufsz = sizeof(recvbuf);
+  taos_init();
+  mqttPrint("mqttInitSystem %s", tsMqttBrokerAddress);
+  return rc;
+}
 
-MQTTAsync                   client;
-MQTTAsync_connectOptions    conn_opts = MQTTAsync_connectOptions_initializer;
-MQTTAsync_disconnectOptions disc_opts = MQTTAsync_disconnectOptions_initializer;
-void*                       mqtt_conn = NULL;
-int                         disc_finished = 0;
-int                         subscribed = 0;
-int                         finished = 0;
-int                         can_exit = 0;
-
-void mqttConnnectLost(void* context, char* cause) {
-  MQTTAsync                client = (MQTTAsync)context;
-  MQTTAsync_connectOptions conn_opts = MQTTAsync_connectOptions_initializer;
-  int                      rc;
-
-  mqttError("\nConnection lost");
-  if (cause) mqttError("     cause: %s", cause);
-
-  mqttPrint("Reconnecting");
-  conn_opts.keepAliveInterval = 20;
-  conn_opts.cleansession = 1;
-  if ((rc = MQTTAsync_connect(client, &conn_opts)) != MQTTASYNC_SUCCESS) {
-    mqttError("Failed to start connect, return code %d", rc);
-    finished = 1;
+int32_t mqttStartSystem() {
+  int rc = 0;
+  mqtt_conn = NULL;
+  mqtt_init_reconnect(&client, mqttReconnectClient, &reconnect_state, mqtt_PublishCallback);
+  if (pthread_create(&client_daemon, NULL, mqttClientRefresher, &client)) {
+    mqttError("Failed to start client daemon.");
+    mqttCleanup(EXIT_FAILURE, -1, NULL);
+    rc = -1;
   }
+  mqttPrint("listening for '%s' messages.", TOPIC);
+  return rc;
+}
+
+void mqttStopSystem() {
+  mqttError("Injecting error: \"MQTT_ERROR_SOCKET_ERROR\"");
+  client.error = MQTT_ERROR_SOCKET_ERROR;
 }
 
+void mqttCleanUpSystem() {
+  mqttPrint("mqttCleanUpSystem");
+  mqttCleanup(EXIT_SUCCESS, client.socketfd, &client_daemon);
+  taos_cleanup(mqtt_conn);
+}
 
-int mqttMessageArrived(void* context, char* topicName, int topicLen, MQTTAsync_message* message) {
-  mqttTrace("Message arrived,topic is %s,message is  %.*s", topicName, message->payloadlen, (char*)message->payload);
+void mqtt_PublishCallback(void** unused, struct mqtt_response_publish* published) {
+  mqttPrint("mqtt_PublishCallback");
+  /* note that published->topic_name is NOT null-terminated (here we'll change it to a c-string) */
+  char* topic_name = (char*)malloc(published->topic_name_size + 1);
+  memcpy(topic_name, published->topic_name, published->topic_name_size);
+  topic_name[published->topic_name_size] = '\0';
+  mqttPrint("Received publish('%s'): %s", topic_name, (const char*)published->application_message);
   char _token[128] = {0};
   char _dbname[128] = {0};
   char _tablename[128] = {0};
@@ -65,162 +93,98 @@ int mqttMessageArrived(void* context, char* topicName, int topicLen, MQTTAsync_m
     mqttPrint("connect database");
     taos_connect_a(NULL, "monitor", tsInternalPass, "", 0, mqttInitConnCb, &client, &mqtt_conn);
   }
-  if (strncmp(topicName, "/taos/", 6) == 0) {
+  if (strncmp(topic_name, "/taos/", 6) == 0) {
     char* p_p_cmd_part[5] = {0};
     char  copystr[1024] = {0};
-    strncpy(copystr, topicName, MIN(1024, strlen(topicName)));
+    strncpy(copystr, topic_name, MIN(1024, published->topic_name_size));
     char part_index = split(copystr, "/", p_p_cmd_part, 10);
     if (part_index < 4) {
-      mqttError("The topic %s is't format '%s'.", topicName, TOPIC);
+      mqttError("The topic %s is't format '%s'.", topic_name, TOPIC);
     } else {
       strncpy(_token, p_p_cmd_part[1], 127);
       strncpy(_dbname, p_p_cmd_part[2], 127);
       strncpy(_tablename, p_p_cmd_part[3], 127);
       mqttPrint("part count=%d,access token:%s,database name:%s, table name:%s", part_index, _token, _dbname,
                 _tablename);
-   
+
       if (mqtt_conn != NULL) {
-        char* _sql = converJsonToSql((char*)message->payload, _dbname, _tablename);
+        char* _sql = converJsonToSql((char*)published->application_message, _dbname, _tablename);
         mqttPrint("query:%s", _sql);
         taos_query_a(mqtt_conn, _sql, mqttQueryInsertCallback, &client);
+        mqttPrint("free sql:%s", _sql);
         free(_sql);
       }
     }
   }
-  MQTTAsync_freeMessage(&message);
-  MQTTAsync_free(topicName);
-  return 1;
+  free(topic_name);
 }
-void mqttQueryInsertCallback(void* param, TAOS_RES* result, int32_t code) {
-  if (code < 0) {
-    mqttError("mqtt:%d, save data failed, code:%s", code, tstrerror(code));
-  } else if (code == 0) {
-    mqttError("mqtt:%d, save data failed, affect rows:%d", code, code);
-  } else {
-    mqttPrint("mqtt:%d, save data   success, code:%s", code, tstrerror(code));
+
+void* mqttClientRefresher(void* client) {
+  while (1) {
+    mqtt_sync((struct mqtt_client*)client);
+    usleep(100000U);
   }
+  return NULL;
 }
 
-void onDisconnectFailure(void* context, MQTTAsync_failureData* response) {
-  mqttError("Disconnect failed, rc %d", response->code);
-  disc_finished = 1;
+void mqttCleanup(int status, int sockfd, pthread_t* client_daemon) {
+  mqttPrint("mqttCleanup");
+  if (sockfd != -1) close(sockfd);
+  if (client_daemon != NULL) pthread_cancel(*client_daemon);
 }
 
-void onDisconnect(void* context, MQTTAsync_successData* response) {
-  mqttError("Successful disconnection");
-  if (mqtt_conn != NULL) {
+void mqttInitConnCb(void* param, TAOS_RES* result, int32_t code) {
+  if (code < 0) {
+    mqttError("mqtt:%d, connect to database failed, reason:%s", code, tstrerror(code));
     taos_close(mqtt_conn);
     mqtt_conn = NULL;
+    return;
   }
-  disc_finished = 1;
-}
-
-void onSubscribe(void* context, MQTTAsync_successData* response) {
-  mqttPrint("Subscribe succeeded");
-  subscribed = 1;
-}
-
-void onSubscribeFailure(void* context, MQTTAsync_failureData* response) {
-  mqttError("Subscribe failed, rc %d", response->code);
-  finished = 1;
+  mqttTrace("mqtt:%d, connect to database success, reason:%s", code, tstrerror(code));
 }
 
-void onConnectFailure(void* context, MQTTAsync_failureData* response) {
-  mqttError("Connect failed, rc %d,,Retry later", response->code);
-  finished = 1;
-  taosMsleep(1000);
-  int rc = 0;
-  if ((rc = MQTTAsync_connect(client, &conn_opts)) != MQTTASYNC_SUCCESS) {
-    mqttError("Failed to start connect, return code %d", rc);
-    finished = 1;
+void mqttQueryInsertCallback(void* param, TAOS_RES* result, int32_t code) {
+  if (code < 0) {
+    mqttError("mqtt:%d, save data failed, code:%s", code, tstrerror(code));
+  } else if (code == 0) {
+    mqttError("mqtt:%d, save data failed, affect rows:%d", code, code);
+  } else {
+    mqttPrint("mqtt:%d, save data   success, code:%s", code, tstrerror(code));
   }
 }
 
-void onConnect(void* context, MQTTAsync_successData* response) {
-  MQTTAsync                 client = (MQTTAsync)context;
-  MQTTAsync_responseOptions opts = MQTTAsync_responseOptions_initializer;
-  int                       rc;
+void mqttReconnectClient(struct mqtt_client* client, void** reconnect_state_vptr) {
+  mqttPrint("mqttReconnectClient");
+  struct reconnect_state_t* reconnect_state = *((struct reconnect_state_t**)reconnect_state_vptr);
 
-  mqttPrint("Successful connection\n");
-
-  mqttPrint("Subscribing to topic %s\nfor client %s using QoS%d", TOPIC, CLIENTID, QOS);
-  opts.onSuccess = onSubscribe;
-  opts.onFailure = onSubscribeFailure;
-  opts.context = client;
-  if ((rc = MQTTAsync_subscribe(client, TOPIC, QOS, &opts)) != MQTTASYNC_SUCCESS) {
-    mqttError("Failed to start subscribe, return code %d\n", rc);
-    finished = 1;
+  /* Close the clients socket if this isn't the initial reconnect call */
+  if (client->error != MQTT_ERROR_INITIAL_RECONNECT) {
+    close(client->socketfd);
   }
-}
 
-int32_t mqttInitSystem() {
-  int rc = 0;
-  if (strnlen(tsMqttBrokerAddress, 128) == 0) {
-    rc = EXIT_FAILURE;
-    mqttError("Can't to create client, mqtt broker address is empty %d", rc);
-  } else {
-    if ((rc = MQTTAsync_create(&client, tsMqttBrokerAddress, CLIENTID, MQTTCLIENT_PERSISTENCE_NONE, NULL)) !=
-        MQTTASYNC_SUCCESS) {
-      mqttError("Failed to create client, return code %d", rc);
-      rc = EXIT_FAILURE;
-
-    } else {
-      if ((rc = MQTTAsync_setCallbacks(client, client, mqttConnnectLost, mqttMessageArrived, NULL)) != MQTTASYNC_SUCCESS) {
-        mqttError("Failed to set callbacks, return code %d", rc);
-        rc = EXIT_FAILURE;
-      } else {
-        conn_opts.keepAliveInterval = 20;
-        conn_opts.cleansession = 1;
-        conn_opts.onSuccess = onConnect;
-        conn_opts.onFailure = onConnectFailure;
-        conn_opts.context = client;
-        taos_init();
-      }
-    }
+  /* Perform error handling here. */
+  if (client->error != MQTT_ERROR_INITIAL_RECONNECT) {
+    mqttError("mqttReconnectClient: called while client was in error state \"%s\"", mqtt_error_str(client->error));
   }
-  return rc;
-}
 
-int32_t mqttStartSystem() {
-  int rc = 0;
-  mqttPrint("mqttStartSystem");
-  if ((rc = MQTTAsync_connect(client, &conn_opts)) != MQTTASYNC_SUCCESS) {
-    mqttError("Failed to start connect, return code %d", rc);
-    rc = EXIT_FAILURE;
-  } else {
-    while (!subscribed && !finished) usleep(10000L);
-    disc_opts.onSuccess = onDisconnect;
-    disc_opts.onFailure = onDisconnectFailure;
-    mqttPrint("Successful started\n");
+  /* Open a new socket. */
+  int sockfd = open_nb_socket(reconnect_state->hostname, reconnect_state->port);
+  if (sockfd == -1) {
+    mqttError("Failed to open socket: ");
+    mqttCleanup(EXIT_FAILURE, sockfd, NULL);
   }
-  return rc;
-}
 
-void mqttInitConnCb(void* param, TAOS_RES* result, int32_t code) {
-  if (code < 0) {
-    mqttError("mqtt:%d, connect to database failed, reason:%s", code, tstrerror(code));
-    taos_close(mqtt_conn);
-    mqtt_conn = NULL;
-    return;
-  }
-  mqttTrace("mqtt:%d, connect to database success, reason:%s", code, tstrerror(code));
-}
+  /* Reinitialize the client. */
+  mqtt_reinit(client, sockfd, reconnect_state->sendbuf, reconnect_state->sendbufsz, reconnect_state->recvbuf,
+              reconnect_state->recvbufsz);
 
-void mqttStopSystem() {
-  int rc = 0;
-  if ((rc = MQTTAsync_disconnect(client, &disc_opts)) != MQTTASYNC_SUCCESS) {
-    mqttError("Failed to start disconnect, return code %d", rc);
-    rc = EXIT_FAILURE;
-  } else {
-    while (!disc_finished) {
-      usleep(10000L);
-    }
-  }
-  taos_close(mqtt_conn);
-}
+  /* Create an anonymous session */
+  const char* client_id = NULL;
+  /* Ensure we have a clean session */
+  uint8_t connect_flags = MQTT_CONNECT_CLEAN_SESSION;
+  /* Send connection request to the broker. */
+  mqtt_connect(client, client_id, NULL, NULL, 0, NULL, NULL, connect_flags, 400);
 
-void mqttCleanUpSystem() {
-  mqttPrint("mqttCleanUpSystem");
-  MQTTAsync_destroy(&client);
-  taos_cleanup(mqtt_conn);
+  /* Subscribe to the topic. */
+  mqtt_subscribe(client, reconnect_state->topic, 0);
+}
\ No newline at end of file
-}