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lib_mysqludf_mqtt.c
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/*
lib_mysqludf_mqtt - a library with MQTT client functions
Copyright (C) 2021 Norbert Richter <nr@prsolution.eu>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <ctype.h>
#include <mysql.h>
#include <MQTTClient.h>
#include <json-parser/json.h>
#include "lib_mysqludf_mqtt.h"
#ifdef DEBUG
#include <syslog.h>
#endif // DEBUG
volatile int last_rc = 0;
char last_func[128] = {0};
/* Helper */
char *strcrpl(char *str, char find, char replace)
{
for (char *p = str; *p; p++) {
if (find == *p) {
*p = replace;
}
}
return str;
}
const char *GetUUID(void)
{
static char struuid[sizeof(LIBNAME) + sizeof(LIBVERSION) + UUID_LEN*2 + 16 + 1];
char uuid[UUID_LEN*2 + 1];
#ifdef DEBUG
setlogmask (LOG_UPTO (LOG_NOTICE));
openlog (LIBNAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
syslog (LOG_NOTICE, "GetUUID()");
#endif
for (int i = 0; i < UUID_LEN; i += 2)
{
sprintf(&uuid[i], "%02x", rand() % 256);
}
sprintf(struuid, "%s_%s_%s", LIBNAME, LIBVERSION, uuid);
#ifdef DEBUG
syslog (LOG_NOTICE, "GetUUID() return %s", struuid);
closelog ();
#endif
return struuid;
}
void parmerror(const char *context, UDF_ARGS *args)
{
char *type;
#ifdef DEBUG
setlogmask (LOG_UPTO (LOG_NOTICE));
openlog (LIBNAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
syslog (LOG_NOTICE, "parmerror()");
#endif
fprintf(stderr, "%s parameter error:\n", context);
for (int i=0; i<args->arg_count; i++) {
switch (args->arg_type[i]) {
case STRING_RESULT:
type = "STRING";
break;
case INT_RESULT:
type = "INT";
break;
case REAL_RESULT:
type = "RWAL";
break;
case DECIMAL_RESULT:
type = "DECIMAL";
break;
case ROW_RESULT:
type = "ROW";
break;
default:
type = "?unknown?";
break;
}
fprintf(stderr, " arg%2d: $%p, type %s (%d), len %ld, maybe_null %c, content '%s'\n",
i,
args->args[i],
type,
args->arg_type[i],
args->lengths[i],
args->maybe_null[i],
(args->arg_type[i]==STRING_RESULT && args->args[i]!=NULL) ? (char *)args->args[i] : ""
);
}
#ifdef DEBUG
closelog ();
#endif
}
int get_json_value(const char *jsonstr, const char *key, int type, void *jsonvalue)
{
int rc = JSON_OK;
int i;
if (NULL == jsonstr || !*jsonstr) {
return JSON_ERROR_EMPTY_STR;
}
json_char *json = (json_char*)jsonstr;
json_value *value = json_parse(json, strlen(jsonstr));
if (value == NULL || json_object != value->type) {
return JSON_ERROR_INVALID_STR;
}
for (i=0; i<value->u.object.length; i++) {
if(0 == strcmp(key, value->u.object.values[i].name)) {
if (type != value->u.object.values[i].value->type) {
rc = JSON_ERROR_WRONG_TYPE;
}
else {
switch (value->u.object.values[i].value->type) {
case json_none:
rc = JSON_ERROR_WRONG_VALUE;
break;
case json_null:
rc = JSON_ERROR_WRONG_VALUE;
break;
case json_object:
rc = JSON_ERROR_WRONG_VALUE;
break;
case json_array:
rc = JSON_ERROR_WRONG_VALUE;
break;
case json_integer:
*(long *)jsonvalue = (long)value->u.object.values[i].value->u.integer;
break;
case json_double:
rc = JSON_ERROR_WRONG_VALUE;
break;
case json_string:
*(char **)jsonvalue = value->u.object.values[i].value->u.string.ptr;
break;
case json_boolean:
*(bool *)jsonvalue = (bool)value->u.object.values[i].value->u.boolean;
break;
}
break;
}
}
}
if (i>=value->u.object.length) {
rc = JSON_ERROR_NOT_FOUND;
}
json_value_free(value);
return rc;
}
void create_conn(connection *conn, const char* username, const char*password, const char *options)
{
char *opt_str;
long opt_long;
bool opt_bool;
#ifdef DEBUG
setlogmask (LOG_UPTO (LOG_NOTICE));
openlog (LIBNAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
syslog (LOG_NOTICE, "create_conn()");
#endif
memcpy(&conn->conn_opts, &(MQTTClient_connectOptions)MQTTClient_connectOptions_initializer, sizeof(MQTTClient_connectOptions));
memcpy(&conn->ssl_opts, &(MQTTClient_SSLOptions)MQTTClient_SSLOptions_initializer, sizeof(MQTTClient_SSLOptions));
memcpy(&conn->will_opts, &(MQTTClient_willOptions)MQTTClient_willOptions_initializer, sizeof(MQTTClient_willOptions));
conn->conn_opts.ssl = &conn->ssl_opts;
// Connection options
if (JSON_OK == get_json_value(options, "username", json_string, &opt_str)) {
conn->conn_opts.username = opt_str;
}
else {
conn->conn_opts.username = username;
}
if (JSON_OK == get_json_value(options, "password", json_string, &opt_str)) {
conn->conn_opts.password = opt_str;
}
else {
conn->conn_opts.password = password;
}
if (JSON_OK == get_json_value(options, "keepAliveInterval", json_integer, &opt_long)) {
conn->conn_opts.keepAliveInterval = opt_long;
}
else {
conn->conn_opts.keepAliveInterval = DEFAULT_KEEPALIVEINTERVAL;
}
if (JSON_OK == get_json_value(options, "cleansession", json_boolean, &opt_bool)) {
conn->conn_opts.cleansession = opt_bool;
}
else {
conn->conn_opts.cleansession = 1;
}
if (JSON_OK == get_json_value(options, "MQTTVersion", json_integer, &opt_long)) {
conn->conn_opts.MQTTVersion = opt_long;
}
else {
conn->conn_opts.MQTTVersion = MQTTVERSION_DEFAULT;
}
if (JSON_OK == get_json_value(options, "reliable", json_integer, &opt_long)) {
conn->conn_opts.reliable = opt_long;
}
if (JSON_OK == get_json_value(options, "connectTimeout", json_integer, &opt_long)) {
conn->conn_opts.connectTimeout = opt_long;
}
if (JSON_OK == get_json_value(options, "maxInflightMessages", json_integer, &opt_long)) {
conn->conn_opts.maxInflightMessages = opt_long;
}
// SSL options
if (JSON_OK == get_json_value(options, "CApath", json_string, &opt_str)) {
conn->ssl_opts.CApath = opt_str;
}
if (JSON_OK == get_json_value(options, "CAfile", json_string, &opt_str)) {
conn->ssl_opts.trustStore = opt_str;
}
if (JSON_OK == get_json_value(options, "keyStore", json_string, &opt_str)) {
conn->ssl_opts.keyStore = opt_str;
}
if (JSON_OK == get_json_value(options, "privateKey", json_string, &opt_str)) {
conn->ssl_opts.privateKey = opt_str;
}
if (JSON_OK == get_json_value(options, "privateKeyPassword", json_string, &opt_str)) {
conn->ssl_opts.privateKeyPassword = opt_str;
}
if (JSON_OK == get_json_value(options, "enabledCipherSuites", json_string, &opt_str)) {
conn->ssl_opts.enabledCipherSuites = opt_str;
}
if (JSON_OK == get_json_value(options, "verify", json_boolean, &opt_bool)) {
conn->ssl_opts.verify = opt_bool;
}
if (JSON_OK == get_json_value(options, "enableServerCertAuth", json_boolean, &opt_bool)) {
conn->ssl_opts.enableServerCertAuth = opt_bool;
}
if (JSON_OK == get_json_value(options, "sslVersion", json_integer, &opt_long)) {
conn->ssl_opts.sslVersion = opt_long;
}
// Last Will and Testament options
if (JSON_OK == get_json_value(options, "willTopic", json_string, &opt_str)) {
conn->will_opts.topicName = opt_str;
conn->conn_opts.will = &conn->will_opts;
}
if (JSON_OK == get_json_value(options, "willMessage", json_string, &opt_str)) {
conn->will_opts.message = opt_str;
conn->conn_opts.will = &conn->will_opts;
}
if (JSON_OK == get_json_value(options, "willRetained", json_boolean, &opt_bool)) {
conn->will_opts.retained = opt_bool;
conn->conn_opts.will = &conn->will_opts;
}
if (JSON_OK == get_json_value(options, "willQos", json_integer, &opt_long)) {
conn->will_opts.qos = opt_long;
conn->conn_opts.will = &conn->will_opts;
}
#ifdef DEBUG
closelog ();
#endif
}
/* Library functions */
/**
* mqtt_info
*
* Returns udf library info as JSON string
* mqtt_info()
*
*/
bool mqtt_info_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
if (args->arg_count != 0) {
parmerror("mqtt_info()", args);
strcpy(message, "No arguments allowed (udf: mqtt_info)");
return 1;
}
initid->ptr = malloc(MAX_RET_STRLEN+1);
if (initid->ptr == NULL) {
strcpy(message, "memory allocation error");
return 1;
}
initid->max_length = MAX_RET_STRLEN;
return 0;
}
void mqtt_info_deinit(UDF_INIT *initid)
{
if (initid->ptr != NULL) {
free(initid->ptr);
}
}
char* mqtt_info(UDF_INIT *initid, UDF_ARGS *args, char* result, unsigned long* length, char *is_null, char *error)
{
MQTTClient_nameValue *mqttClientVersion;
char libinfo[MAX_RET_STRLEN] = {0};
char *res = (char *)initid->ptr;
#ifdef DEBUG
setlogmask (LOG_UPTO (LOG_NOTICE));
openlog (LIBNAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
syslog (LOG_NOTICE, "mqtt_info()");
#endif
*is_null = 0;
*error = 0;
if (res == NULL) {
strcpy(result, "memory allocation error");
*length = strlen(result);
*error = 1;
return result;
}
mqttClientVersion = MQTTClient_getVersionInfo();
while (mqttClientVersion != NULL &&
mqttClientVersion->name != NULL &&
mqttClientVersion->value != NULL &&
strlen(libinfo) < MAX_RET_STRLEN-1) {
if (*libinfo) {
strcat(libinfo, ",");
}
if( (strlen(libinfo) + strlen(mqttClientVersion->name) + strlen(mqttClientVersion->value) + 5) < MAX_RET_STRLEN-1) {
char *value = malloc(strlen(mqttClientVersion->value));
if (value != NULL) {
strcpy(value, mqttClientVersion->value);
sprintf(libinfo+strlen(libinfo), "\"%s\":\"%s\"", mqttClientVersion->name, strcrpl(value, '"', '\''));
free(value);
}
mqttClientVersion++;
}
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-truncation"
snprintf(res, MAX_RET_STRLEN, "{\"Name\": \"%s\", \"Version\": \"%s\", \"Build\": \"%s\", \"Library\": {%s}}", LIBNAME, LIBVERSION, LIBBUILD, libinfo);
#pragma GCC diagnostic pop
*length = strlen(res);
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_info(): %s", res);
closelog ();
#endif
return res;
}
/**
* mqtt_lasterror
*
* Returns last error as JSON string
* mqtt_lasterror()
*
*/
bool mqtt_lasterror_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
if (args->arg_count != 0) {
parmerror("mqtt_lasterror()", args);
strcpy(message, "No arguments allowed (udf: mqtt_lasterror)");
return 1;
}
initid->ptr = malloc(MAX_RET_STRLEN+1);
if (initid->ptr == NULL) {
strcpy(message, "memory allocation error");
return 1;
}
return 0;
}
void mqtt_lasterror_deinit(UDF_INIT *initid)
{
if (initid->ptr != NULL) {
free(initid->ptr);
}
}
char* mqtt_lasterror(UDF_INIT *initid, UDF_ARGS *args, char* result, unsigned long* length, char *is_null, char *error)
{
char *res = (char *)initid->ptr;
#ifdef DEBUG
setlogmask (LOG_UPTO (LOG_NOTICE));
openlog (LIBNAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
syslog (LOG_NOTICE, "mqtt_lasterror()");
#endif
*is_null = 0;
*error = 0;
if (res == NULL) {
strcpy(result, "memory allocation error");
*length = strlen(result);
*error = 1;
return result;
}
snprintf(res, MAX_RET_STRLEN, "{\"func\":\"%s\",\"rc\":%d, \"desc\": \"%s\"}", last_func, last_rc, MQTTClient_strerror(last_rc));
*length = strlen(res);
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_lasterror(): %s", res);
closelog ();
#endif
return res;
}
/**
* mqtt_connect
*
* Connect to a mqtt server and returns a handle.
* mqtt_connect(server {,username} {,password {,options}}})
* returns connect handle or 0 on error
*/
bool mqtt_connect_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
initid->ptr = NULL;
if ( // server
(args->arg_count == 1 && args->arg_type[0]==STRING_RESULT && args->args[0]!=NULL)
|| // server, username
(args->arg_count == 2 && args->arg_type[0]==STRING_RESULT && args->args[0]!=NULL
&& args->arg_type[1]==STRING_RESULT)
|| // server, username, password
(args->arg_count == 3 && args->arg_type[0]==STRING_RESULT && args->args[0]!=NULL
&& args->arg_type[1]==STRING_RESULT
&& args->arg_type[2]==STRING_RESULT)
|| // server, username, password, options
(args->arg_count == 4 && args->arg_type[0]==STRING_RESULT && args->args[0]!=NULL
&& args->arg_type[1]==STRING_RESULT
&& args->arg_type[2]==STRING_RESULT
&& args->arg_type[3]==STRING_RESULT)
) {
initid->ptr = malloc(sizeof(connection));
if (initid->ptr == NULL) {
parmerror("mqtt_connect()", args);
strcpy(message, "memory allocation error");
return 1;
}
return 0;
}
else {
parmerror("mqtt_connect()", args);
strcpy(message, "function argument(s) error");
return 1;
}
}
void mqtt_connect_deinit(UDF_INIT *initid)
{
if (initid->ptr != NULL) {
free(initid->ptr);
}
}
ulonglong mqtt_connect(UDF_INIT *initid, UDF_ARGS *args, char *is_null, char *error)
{
connection *conn = (connection *)initid->ptr;
#ifdef DEBUG
setlogmask (LOG_UPTO (LOG_NOTICE));
openlog (LIBNAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
#endif
*is_null = 0;
*error = 0;
char *address = "";
char *username = "";
char *password = "";
char *options = "";
// Do not assume that the string is null-terminated
// see https://dev.mysql.com/doc/refman/5.7/en/udf-arguments.html
if (args->arg_count >= 1 && args->args[0]!=NULL) {
address = (char *)args->args[0];
address[args->lengths[0]] = '\0';
}
if (args->arg_count >= 2 && args->args[1]!=NULL) {
username = (char *)args->args[1];
username[args->lengths[1]] = '\0';
}
if (args->arg_count >= 3 && args->args[2]!=NULL) {
password = (char *)args->args[2];
password[args->lengths[2]] = '\0';
}
if (args->arg_count >= 4 && args->args[3]!=NULL) {
options = (char *)args->args[3];
options[args->lengths[3]] = '\0';
}
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_connect(): MQTTClient_create \"%s\"", address);
#endif
strcpy(last_func, "MQTTClient_create");
int rc = last_rc = MQTTClient_create(&conn->client, address, GetUUID(), MQTTCLIENT_PERSISTENCE_NONE, NULL);
if (rc != MQTTCLIENT_SUCCESS)
{
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_connect rc=%d", rc);
closelog ();
#endif
*is_null = 1;
*error = 1;
return rc;
}
create_conn(conn, username, password, options);
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_connect 'client %p", conn->client);
#endif
strcpy(last_func, "MQTTClient_connect");
rc = last_rc = MQTTClient_connect(conn->client, &conn->conn_opts);
if (rc != MQTTCLIENT_SUCCESS)
{
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_connect rc=%d", rc);
closelog ();
#endif
*is_null = 1;
*error = 1;
return rc;
}
#ifdef DEBUG
closelog ();
#endif
return (longlong)conn->client;
}
/**
* mqtt_disconnect
*
* Disconnect from a mqtt server.
* mqtt_disconnect(handle(, timeout))
* returns 0 if successful
*/
bool mqtt_disconnect_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
if ( args->arg_count == 1
// handle
&& args->arg_type[0]==INT_RESULT
) {
return 0;
}
else {
parmerror("mqtt_disconnect()", args);
strcpy(message, "function argument(s) error");
return 1;
}
}
void mqtt_disconnect_deinit(UDF_INIT *initid)
{
}
ulonglong mqtt_disconnect(UDF_INIT *initid, UDF_ARGS *args, char *is_null, char *error)
{
MQTTClient client = (MQTTClient)*(longlong*)args->args[0];
#ifdef DEBUG
setlogmask (LOG_UPTO (LOG_NOTICE));
openlog (LIBNAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
syslog (LOG_NOTICE, "mqtt_disconnect()");
#endif
strcpy(last_func, "MQTTClient_disconnect");
int rc = last_rc = MQTTClient_disconnect(client, DEFAULT_TIMEOUT);
if (rc == MQTTCLIENT_SUCCESS) {
MQTTClient_destroy(&client);
}
else {
*error = 1;
}
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_disconnect() rc=%d", rc);
closelog ();
#endif
return rc;
}
/**
* mqtt_publish
*
* Publish a mqtt payload and returns its status.
*
* Possible calls
* mqtt_publish(server, [username], [password], topic, [payload] {,[qos] {,[retained] {,[timeout] {,[options]}}}})
* mqtt_publish(client, topic, [payload] {,[qos] {,[retained] {,[timeout] {,[options]}}}})
*/
bool mqtt_publish_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
#ifdef DEBUG
setlogmask (LOG_UPTO (LOG_NOTICE));
openlog (LIBNAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
#endif
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_publish_init()");
#endif
initid->ptr = malloc(sizeof(connection));
if (initid->ptr == NULL) {
parmerror("mqtt_publish()", args);
strcpy(message, "memory allocation error");
#ifdef DEBUG
closelog ();
#endif
return 1;
}
connection *conn = (connection *)initid->ptr;
conn->client = NULL;
strcpy(last_func, "mqtt_publish_init");
conn->rc = last_rc = MQTTCLIENT_DISCONNECTED;
conn->mqtt_publish_format = 0;
//~ 1: mqtt_publish(server, [username], [password], topic, [payload])
if ( args->arg_count==5
// server
&& args->arg_type[0]==STRING_RESULT
&& args->args[0]!=NULL
// username
&& args->arg_type[1]==STRING_RESULT
// password
&& args->arg_type[2]==STRING_RESULT
// topic
&& args->arg_type[3]==STRING_RESULT
&& args->args[3]!=NULL
// payload
&& args->arg_type[4]==STRING_RESULT
) {
conn->mqtt_publish_format = 1;
#ifdef DEBUG
closelog ();
#endif
return 0;
}
//~ 2: mqtt_publish(server, [username], [password], topic, [payload], [qos])
else if ( args->arg_count==6
// server
&& args->arg_type[0]==STRING_RESULT
&& args->args[0]!=NULL
// username
&& args->arg_type[1]==STRING_RESULT
// password
&& args->arg_type[2]==STRING_RESULT
// topic
&& args->arg_type[3]==STRING_RESULT
&& args->args[3]!=NULL
// payload
&& args->arg_type[4]==STRING_RESULT
// qos
&& ((args->args[5]==NULL) || (args->arg_type[5]==INT_RESULT && ((int)*((longlong*)args->args[5])>=0 && (int)*((longlong*)args->args[5])<=2)))
) {
conn->mqtt_publish_format = 2;
#ifdef DEBUG
closelog ();
#endif
return 0;
}
//~ 3: mqtt_publish(server, [username], [password], topic, [payload], [qos], [retained])
else if ( args->arg_count==7
// server
&& args->arg_type[0]==STRING_RESULT
&& args->args[0]!=NULL
// username
&& args->arg_type[1]==STRING_RESULT
// password
&& args->arg_type[2]==STRING_RESULT
// topic
&& args->arg_type[3]==STRING_RESULT
&& args->args[3]!=NULL
// payload
&& args->arg_type[4]==STRING_RESULT
// qos
&& ((args->args[5]==NULL) || (args->arg_type[5]==INT_RESULT && ((int)*((longlong*)args->args[5])>=0 && (int)*((longlong*)args->args[5])<=2)))
// retained
&& ((args->args[6]==NULL) || (args->arg_type[6]==INT_RESULT && ((int)*((longlong*)args->args[6])>=0 && (int)*((longlong*)args->args[6])<=1)))
) {
conn->mqtt_publish_format = 3;
#ifdef DEBUG
closelog ();
#endif
return 0;
}
//~ 4: mqtt_publish(server, [username], [password], topic, [payload], [qos], [retained], [timeout])
else if ( args->arg_count==8
// server
&& args->arg_type[0]==STRING_RESULT
&& args->args[0]!=NULL
// username
&& args->arg_type[1]==STRING_RESULT
// password
&& args->arg_type[2]==STRING_RESULT
// topic
&& args->arg_type[3]==STRING_RESULT
&& args->args[3]!=NULL
// payload
&& args->arg_type[4]==STRING_RESULT
// qos
&& ((args->args[5]==NULL) || (args->arg_type[5]==INT_RESULT && ((int)*((longlong*)args->args[5])>=0 && (int)*((longlong*)args->args[5])<=2)))
// retained
&& ((args->args[6]==NULL) || (args->arg_type[6]==INT_RESULT && ((int)*((longlong*)args->args[6])>=0 && (int)*((longlong*)args->args[6])<=1)))
// timeout
&& ((args->args[7]==NULL) || (args->arg_type[7]==INT_RESULT && ((int)*((longlong*)args->args[7])>=0)))
) {
conn->mqtt_publish_format = 4;
#ifdef DEBUG
closelog ();
#endif
return 0;
}
//~ 5: mqtt_publish(server, [username], [password], topic, [payload], [qos], [retained], [timeout], [options])
else if ( args->arg_count==9
// server
&& args->arg_type[0]==STRING_RESULT
&& args->args[0]!=NULL
// username
&& args->arg_type[1]==STRING_RESULT
// password
&& args->arg_type[2]==STRING_RESULT
// topic
&& args->arg_type[3]==STRING_RESULT
&& args->args[3]!=NULL
// payload
&& args->arg_type[4]==STRING_RESULT
// qos
&& ((args->args[5]==NULL) || (args->arg_type[5]==INT_RESULT && ((int)*((longlong*)args->args[5])>=0 && (int)*((longlong*)args->args[5])<=2)))
// retained
&& ((args->args[6]==NULL) || (args->arg_type[6]==INT_RESULT && ((int)*((longlong*)args->args[6])>=0 && (int)*((longlong*)args->args[6])<=1)))
// timeout
&& ((args->args[7]==NULL) || (args->arg_type[7]==INT_RESULT && ((int)*((longlong*)args->args[7])>=0)))
// options
&& args->arg_type[8]==STRING_RESULT
) {
conn->mqtt_publish_format = 5;
#ifdef DEBUG
closelog ();
#endif
return 0;
}
//~ 6: mqtt_publish(client, topic, [payload])
else if ( args->arg_count==3
// client
&& args->arg_type[0]==INT_RESULT
// topic
&& args->arg_type[1]==STRING_RESULT
&& args->args[1]!=NULL
// payload
&& args->arg_type[2]==STRING_RESULT
) {
conn->mqtt_publish_format = 6;
#ifdef DEBUG
closelog ();
#endif
return 0;
}
//~ 7: mqtt_publish(client, topic, [payload], [qos])
else if ( args->arg_count==4
// client
&& args->arg_type[0]==INT_RESULT
// topic
&& args->arg_type[1]==STRING_RESULT
&& args->args[1]!=NULL
// payload
&& args->arg_type[2]==STRING_RESULT
// qos
&& ((args->args[3]==NULL) || (args->arg_type[3]==INT_RESULT && ((int)*((longlong*)args->args[3])>=0 && (int)*((longlong*)args->args[3])<=2)))
) {
conn->mqtt_publish_format = 7;
#ifdef DEBUG
closelog ();
#endif
return 0;
}
//~ 8: mqtt_publish(client, topic, [payload], [qos], [retained])
else if ( args->arg_count==5
// client
&& args->arg_type[0]==INT_RESULT
// topic
&& args->arg_type[1]==STRING_RESULT
&& args->args[1]!=NULL
// payload
&& args->arg_type[2]==STRING_RESULT
// qos
&& ((args->args[3]==NULL) || (args->arg_type[3]==INT_RESULT && ((int)*((longlong*)args->args[3])>=0 && (int)*((longlong*)args->args[3])<=2)))
// retained
&& ((args->args[4]==NULL) || (args->arg_type[4]==INT_RESULT && ((int)*((longlong*)args->args[4])>=0 && (int)*((longlong*)args->args[4])<=1)))
) {
conn->mqtt_publish_format = 8;
#ifdef DEBUG
closelog ();
#endif
return 0;
}
//~ 9: mqtt_publish(client, topic, [payload], [qos], [retained], [timeout])
else if ( args->arg_count==6
// client
&& args->arg_type[0]==INT_RESULT
// topic
&& args->arg_type[1]==STRING_RESULT
&& args->args[1]!=NULL
// payload
&& args->arg_type[2]==STRING_RESULT
// qos
&& ((args->args[3]==NULL) || (args->arg_type[3]==INT_RESULT && ((int)*((longlong*)args->args[3])>=0 && (int)*((longlong*)args->args[3])<=2)))
// retained
&& ((args->args[4]==NULL) || (args->arg_type[4]==INT_RESULT && ((int)*((longlong*)args->args[4])>=0 && (int)*((longlong*)args->args[4])<=1)))
// timeout
&& ((args->args[5]==NULL) || (args->arg_type[5]==INT_RESULT && ((int)*((longlong*)args->args[5])>=0)))
) {
conn->mqtt_publish_format = 9;
#ifdef DEBUG
closelog ();
#endif
return 0;
}
//~ 10: mqtt_publish(client, topic, [payload], [qos], [retained], [timeout], [options])
else if ( args->arg_count==7
// client
&& args->arg_type[0]==INT_RESULT
// topic
&& args->arg_type[1]==STRING_RESULT
&& args->args[1]!=NULL
// payload
&& args->arg_type[2]==STRING_RESULT
// qos
&& ((args->args[3]==NULL) || (args->arg_type[3]==INT_RESULT && ((int)*((longlong*)args->args[3])>=0 && (int)*((longlong*)args->args[3])<=2)))
// retained
&& ((args->args[4]==NULL) || (args->arg_type[4]==INT_RESULT && ((int)*((longlong*)args->args[4])>=0 && (int)*((longlong*)args->args[4])<=1)))
// timeout
&& ((args->args[5]==NULL) || (args->arg_type[5]==INT_RESULT && ((int)*((longlong*)args->args[5])>=0)))
// options
&& (args->arg_type[6]==STRING_RESULT)
) {
conn->mqtt_publish_format = 10;
#ifdef DEBUG
closelog ();
#endif
return 0;
}
parmerror("mqtt_publish()", args);
strcpy(message, "function argument(s) error");
#ifdef DEBUG
closelog ();
#endif
return 1;
}
void mqtt_publish_deinit(UDF_INIT *initid)
{
#ifdef DEBUG
setlogmask (LOG_UPTO (LOG_NOTICE));
openlog (LIBNAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
#endif
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_publish_deinit");
#endif
if (initid->ptr != NULL) {
free(initid->ptr);
}
#ifdef DEBUG
closelog ();
#endif
}
ulonglong mqtt_publish(UDF_INIT *initid, UDF_ARGS *args, char *is_null, char *error)
{
connection *conn = (connection *)initid->ptr;
char *address, *username, *password, *topic, *payload, *options = "";
int qos, retained, timeout, payloadlength = 0;
#ifdef DEBUG
setlogmask (LOG_UPTO (LOG_NOTICE));
openlog (LIBNAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
#endif
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_publish(): mqtt_publish_format %d", conn->mqtt_publish_format);
#endif
*is_null = 0;
*error = 0;
qos = DEFAULT_QOS;
retained = DEFAULT_RETAINED;
timeout = DEFAULT_TIMEOUT;
switch (conn->mqtt_publish_format) {
//~ 10: mqtt_publish(client, topic, [payload], [qos], [retained], [timeout], [options])
case 10:
options = args->args[6]!=NULL ? (char *)args->args[6] : "";
//~ 9: mqtt_publish(client, topic, [payload], [qos], [retained], [timeout])
case 9:
timeout = args->args[5]!=NULL ? (int)*((longlong*)args->args[5]) : DEFAULT_TIMEOUT;
//~ 8: mqtt_publish(client, topic, [payload], [qos], [retained])
case 8:
retained = args->args[4]!=NULL ? (int)*((longlong*)args->args[4]) : DEFAULT_RETAINED;
//~ 7: mqtt_publish(client, topic, [payload], [qos])
case 7:
qos = args->args[3]!=NULL ? (int)*((longlong*)args->args[3]) : DEFAULT_QOS;
//~ 6: mqtt_publish(client, topic, [payload])
case 6:
payload = args->args[2]!=NULL ? (char *)args->args[2] : "";
payloadlength=args->args[2]!=NULL ? args->lengths[2] : 0;
topic = (char *)args->args[1];
conn->client= (MQTTClient)*(longlong*)args->args[0];
break;
//~ 5: mqtt_publish(server, [username], [password], topic, [payload], [qos], [retained], [timeout], [options])
case 5:
options = args->args[8]!=NULL ? (char *)args->args[8] : "";
//~ 4: mqtt_publish(server, [username], [password], topic, [payload], [qos], [retained], [timeout])
case 4:
timeout = args->args[7]!=NULL ? (int)*((longlong*)args->args[7]) : DEFAULT_TIMEOUT;
//~ 3: mqtt_publish(server, [username], [password], topic, [payload], [qos], [retained])
case 3:
retained = args->args[6]!=NULL ? (int)*((longlong*)args->args[6]) : DEFAULT_RETAINED;
//~ 2: mqtt_publish(server, [username], [password], topic, [payload], [qos])
case 2:
qos = args->args[5]!=NULL ? (int)*((longlong*)args->args[5]) : DEFAULT_QOS;
//~ 1: mqtt_publish(server, [username], [password], topic, [payload])
case 1:
payload = args->args[4]!=NULL ? (char *)args->args[4] : "";
payloadlength=args->args[4]!=NULL ? args->lengths[4] : 0;
topic = (char *)args->args[3];
password = (char *)args->args[2];
username = (char *)args->args[1];
address = (char *)args->args[0];
break;
default:
break;
}
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_publish(): preset done");
#endif
// Do not assume that the string is null-terminated
// see https://dev.mysql.com/doc/refman/5.7/en/udf-arguments.html
switch (conn->mqtt_publish_format) {
case 10:
if (args->args[6]!=NULL) options[args->lengths[6]] = '\0';
case 9:
case 8:
case 7:
case 6:
if (args->args[1]!=NULL) topic[args->lengths[1]] = '\0';
if (args->args[2]!=NULL) payload[args->lengths[2]] = '\0';
strcpy(last_func, "mqtt_publish");
conn->rc = last_rc = (conn->client!=NULL) ? MQTTCLIENT_SUCCESS : MQTTCLIENT_DISCONNECTED;
break;
case 5:
if (args->args[8]!=NULL) options[args->lengths[8]] = '\0';
case 4:
case 3:
case 2:
case 1:
if (args->args[0]!=NULL) address[args->lengths[0]] = '\0';
if (args->args[1]!=NULL) username[args->lengths[1]] = '\0';
if (args->args[2]!=NULL) password[args->lengths[2]] = '\0';
if (args->args[3]!=NULL) topic[args->lengths[3]] = '\0';
if (args->args[4]!=NULL) payload[args->lengths[4]] = '\0';
strcpy(last_func, "MQTTClient_create");
conn->rc = last_rc = MQTTClient_create(&conn->client, address, GetUUID(), MQTTCLIENT_PERSISTENCE_NONE, NULL);
if (conn->rc == MQTTCLIENT_SUCCESS) {
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_publish(): username=\"%s\", password=\"%s\", options='%s'", username, password, options);
#endif
create_conn(conn, username, password, options);
strcpy(last_func, "MQTTClient_connect");
conn->rc = last_rc = MQTTClient_connect(conn->client, &conn->conn_opts);
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_publish 'client %p, rc=%d", conn->client, conn->rc);
#endif
}
break;
}
#ifdef DEBUG
syslog (LOG_NOTICE, "mqtt_publish(): rc=%d", conn->rc);
#endif