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/**
*!
* \file b_srv_mqtt.c
* \version v0.0.1
* \date 2023/08/27
* \author Bean(notrynohigh@outlook.com)
*******************************************************************************
* @attention
*
* Copyright (c) 2023 Bean
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*******************************************************************************
*/
/*Includes ----------------------------------------------*/
#include "services/inc/b_srv_mqtt.h"
#if (defined(_MQTT_SERVICE_ENABLE) && (_MQTT_SERVICE_ENABLE == 1))
#include "core/inc/b_task.h"
#include "core/inc/b_timer.h"
#include "thirdparty/mqtt-pack/MQTTPacket.h"
#include "utils/inc/b_util_list.h"
#include "utils/inc/b_util_log.h"
#include "utils/inc/b_util_memp.h"
/**
* \addtogroup BABYOS
* \{
*/
/**
* \addtogroup SERVICES
* \{
*/
/**
* \addtogroup MQTT
* \{
*/
/**
* \defgroup MQTT_Private_TypesDefinitions
* \{
*/
typedef struct
{
uint8_t stat;
char *pbroker;
char *host;
uint8_t is_mqtts;
uint16_t port;
char *client_id;
char *user_name;
char *user_passwd;
uint16_t keep_alive;
pbMqttCallback_t cb;
void *user_data;
bTaskId_t task_id;
bTimerId_t timer_id;
int sock_fd;
uint32_t last_recv;
uint16_t packet_id;
} bMqttSrvInstance_t;
typedef struct
{
uint8_t type;
uint8_t *pack;
uint32_t pack_len;
void (*release)(void *);
} bMqttPack_t;
typedef struct
{
uint8_t state;
uint16_t pack_id;
uint16_t count;
char *pack;
uint32_t pack_len;
struct list_head node;
} bMqttSubscribeNode_t;
/**
* \}
*/
/**
* \defgroup MQTT_Private_Defines
* \{
*/
#define B_MQTT_STA_INIT (0)
#define B_MQTT_STA_TCP_CONNECTED (1)
#define MQTT_STEP_CONN (0x1)
#define MQTT_STEP_SUB (0x2)
#define MAX_PACKET_ID 65535
/**
* \}
*/
/**
* \defgroup MQTT_Private_Macros
* \{
*/
/**
* \}
*/
/**
* \defgroup MQTT_Private_Variables
* \{
*/
static bMqttSrvInstance_t *pbMqttInstance = NULL;
static LIST_HEAD(bMqttSubscribeListHead);
B_TASK_CREATE_ATTR(bMqttTaskAttr);
B_TIMER_CREATE_ATTR(bMqttTimerAttr);
/**
* \}
*/
/**
* \defgroup MQTT_Private_FunctionPrototypes
* \{
*/
/**
* \}
*/
/**
* \defgroup MQTT_Private_Functions
* \{
*/
static void _bMqttFree(void *addr)
{
bFree(addr);
}
static void *_bMqttMalloc(uint32_t len)
{
return bMalloc(len);
}
static int _bMqttParseUrl(const char *url, char **host, uint16_t *port, uint8_t *is_mqtts)
{
// Check if the URL starts with "mqtt://" or "mqtts://"
const char *prefix_mqtt = "mqtt://";
const char *prefix_mqtts = "mqtts://";
const char *hostname_start = NULL;
int tmp_port = -1;
uint8_t tmp_is_mqtts = 0;
if (strncmp(url, prefix_mqtt, strlen(prefix_mqtt)) == 0)
{
tmp_is_mqtts = 0;
hostname_start = url + strlen(prefix_mqtt);
}
else if (strncmp(url, prefix_mqtts, strlen(prefix_mqtts)) == 0)
{
tmp_is_mqtts = 1;
hostname_start = url + strlen(prefix_mqtts);
}
else
{
return -1; // Invalid URL scheme
}
// Find the position of the colon (:) and slash (/) after the hostname
const char *colon_pos = strchr(hostname_start, ':');
const char *slash_pos = strchr(hostname_start, '/');
// Extract the hostname
uint32_t hostname_len = 0;
if (colon_pos != NULL)
{
hostname_len = colon_pos - hostname_start;
}
else if (slash_pos != NULL)
{
hostname_len = slash_pos - hostname_start;
}
else
{
hostname_len = strlen(hostname_start);
}
if (hostname_len > strlen(hostname_start))
{
return -1;
}
char *phostname = _bMqttMalloc(hostname_len + 1);
if (phostname == NULL)
{
return -1;
}
strncpy(phostname, hostname_start, hostname_len);
phostname[hostname_len] = '\0';
// Extract the port if specified
if (colon_pos != NULL)
{
const char *port_start = colon_pos + 1;
char port_str[6] = {0}; // Port number is at most 5 digits
uint32_t port_len = 0;
if (slash_pos != NULL)
{
port_len = slash_pos - port_start;
}
else
{
port_len = strlen(port_start);
}
if (port_len >= sizeof(port_str))
{
_bMqttFree(phostname);
return -1; // Port number too long
}
strncpy(port_str, port_start, port_len);
tmp_port = atoi(port_str);
}
// If port is not specified, set default ports
if (tmp_port == -1)
{
tmp_port = tmp_is_mqtts ? 8883 : 1883;
}
*host = phostname;
*port = (uint16_t)(tmp_port & 0xffff);
*is_mqtts = tmp_is_mqtts;
return 0;
}
static int _bMqttCalBuffSize(MQTTPacket_connectData *data)
{
int len = 0;
// 固定报头
len += 2;
// 可变报头
len += 2 + strlen("MQTT"); // 协议名长度和协议名
len += 1; // 协议级别
len += 1; // 连接标志
len += 2; // 保持连接时间
// 有效载荷
len += 2 + strlen(data->clientID.cstring); // 客户端标识符长度和客户端标识符
if (data->willFlag)
{
len += 2 + strlen(data->will.topicName.cstring); // 遗嘱主题长度和遗嘱主题
len += 2 + data->will.message.lenstring.len; // 遗嘱消息长度和遗嘱消息
}
if (data->username.cstring)
{
len += 2 + strlen(data->username.cstring); // 用户名长度和用户名
}
if (data->password.cstring)
{
len += 2 + strlen(data->password.cstring); // 密码长度和密码
}
return len;
}
static void _bMqttTransCb(bTransEvent_t event, void *param, void *arg)
{
if ((event == B_TRANS_DISCONNECT) && (pbMqttInstance->stat == B_MQTT_STA_TCP_CONNECTED))
{
pbMqttInstance->stat = B_MQTT_STA_INIT;
}
}
static int _bMqttRead(bMqttSrvInstance_t *pinstance, uint8_t *pbuf, uint16_t len)
{
uint16_t rlen = 0;
int ret = 0;
if (pinstance->is_mqtts == 0)
{
ret = bRecv(pinstance->sock_fd, pbuf, len, &rlen);
if (ret < 0)
{
return ret;
}
}
else
{
}
return rlen;
}
static int _bMqttWrite(bMqttSrvInstance_t *pinstance, uint8_t *pbuf, uint16_t len)
{
uint16_t rlen = 0;
int ret = 0;
if (pinstance->is_mqtts == 0)
{
ret = bSend(pinstance->sock_fd, pbuf, len, &rlen);
if (ret < 0)
{
return ret;
}
}
else
{
}
return rlen;
}
static int _bMqttDecodePacket(bMqttSrvInstance_t *pinstance, int *value)
{
unsigned char i;
int multiplier = 1;
int len = 0;
const int MAX_NO_OF_REMAINING_LENGTH_BYTES = 4;
*value = 0;
do
{
int rc = MQTTPACKET_READ_ERROR;
if (++len > MAX_NO_OF_REMAINING_LENGTH_BYTES)
{
rc = MQTTPACKET_READ_ERROR; /* bad data */
len = 0;
b_log_e("MQTT read remaining length error\r\n");
goto exit;
}
rc = _bMqttRead(pinstance, &i, 1);
if (rc != 1)
{
len = 0;
b_log_e("bMqttRead failed\r\n");
goto exit;
}
*value += (i & 127) * multiplier;
multiplier *= 128;
} while ((i & 128) != 0);
exit:
return len;
}
static int _bMqttConnect(bMqttSrvInstance_t *pinstance)
{
MQTTPacket_connectData options = MQTTPacket_connectData_initializer;
int len = 0;
options.clientID.cstring = pinstance->client_id;
options.username.cstring = pinstance->user_name;
options.password.cstring = pinstance->user_passwd;
len = _bMqttCalBuffSize(&options);
if (len <= 0)
{
return -1;
}
uint8_t *pbuf = _bMqttMalloc(len);
if (pbuf == NULL)
{
return -1;
}
if ((len = MQTTSerialize_connect(pbuf, len, &options)) <= 0)
{
_bMqttFree(pbuf);
pbuf = NULL;
return -1;
}
_bMqttWrite(pinstance, pbuf, len);
_bMqttFree(pbuf);
pbuf = NULL;
return 0;
}
static uint16_t _bMqttGetNextPacketId(bMqttSrvInstance_t *pinstance)
{
return pinstance->packet_id =
(pinstance->packet_id == MAX_PACKET_ID) ? 1 : pinstance->packet_id + 1;
}
static int _bMqttSubscribeReset()
{
bMqttSubscribeNode_t *pnode = NULL;
struct list_head *pos = NULL;
list_for_each(pos, &bMqttSubscribeListHead)
{
pnode = list_entry(pos, bMqttSubscribeNode_t, node);
pnode->state = 0;
}
return 0;
}
static int _bMqttSubscribe(bMqttSrvInstance_t *pinstance)
{
bMqttSubscribeNode_t *pnode = NULL;
struct list_head *pos = NULL;
list_for_each(pos, &bMqttSubscribeListHead)
{
pnode = list_entry(pos, bMqttSubscribeNode_t, node);
if (pnode->state == 0)
{
b_log("sub:%d\r\n", pnode->pack_id);
if (pnode->pack != NULL)
{
bSend(pinstance->sock_fd, (uint8_t *)pnode->pack, pnode->pack_len, NULL);
break;
}
}
}
return 0;
}
static int _bMqttSubscribeAckHandle(bMqttPack_t *pack)
{
int index = 1;
uint16_t pack_id = 0;
while (pack->pack[index] & 0x80)
{
index += 1;
}
index += 1;
pack_id |= pack->pack[index];
pack_id <<= 8;
pack_id |= pack->pack[index + 1];
b_log("suback:%d\r\n", pack_id);
bMqttSubscribeNode_t *pnode = NULL;
struct list_head *pos = NULL;
list_for_each(pos, &bMqttSubscribeListHead)
{
pnode = list_entry(pos, bMqttSubscribeNode_t, node);
if (pnode->pack_id == pack_id)
{
pnode->state = 1;
return 0;
}
}
return -1;
}
static int _bMqttAddSubscribe(bMqttSrvInstance_t *pinstance, const char **topic, int *qos,
int topic_num)
{
int len = 0;
int ret = 0;
int i = 0;
MQTTString *topic_str = _bMqttMalloc(topic_num * sizeof(MQTTString));
if (topic_str == NULL)
{
return -1;
}
len = 1 + 4 + 2;
for (i = 0; i < topic_num; i++)
{
topic_str[i].cstring = (char *)topic[i];
len += strlen(topic[i]) + 3;
}
b_log("sub malloc len:%d\r\n", len);
uint8_t *pack = _bMqttMalloc(len);
if (pack == NULL)
{
_bMqttFree(topic_str);
return -1;
}
uint16_t pack_id = _bMqttGetNextPacketId(pinstance);
len = MQTTSerialize_subscribe(pack, len, 0, pack_id, topic_num, topic_str, qos);
if (len <= 0)
{
b_log_w("serialize sub err..%d.\r\n", len);
_bMqttFree(topic_str);
_bMqttFree(pack);
return -1;
}
_bMqttFree(topic_str);
topic_str = NULL;
bMqttSubscribeNode_t *pnode = _bMqttMalloc(sizeof(bMqttSubscribeNode_t));
if (pnode == NULL)
{
_bMqttFree(pack);
return -1;
}
pnode->state = 0;
pnode->count = topic_num;
pnode->pack_id = pack_id;
pnode->pack = (char *)pack;
pnode->pack_len = len;
list_add(&pnode->node, &bMqttSubscribeListHead);
return 0;
}
static int _bMqttReadPacket(bMqttSrvInstance_t *pinstance, bMqttPack_t *pack)
{
MQTTHeader header = {0};
int len = 0;
uint8_t fix_byte = 0;
int remain_len = 0;
uint8_t buf[8];
memset(pack, 0, sizeof(bMqttPack_t));
/* 1. read the header byte. This has the packet type in it */
int rc = _bMqttRead(pinstance, &fix_byte, 1);
if (rc != 1)
{
b_log_e("read header byte failed");
goto exit;
}
/* 2. read the remaining length. This is variable in itself */
if (0 == _bMqttDecodePacket(pinstance, &remain_len))
{
b_log_e("decode packet failed\r\n");
goto exit;
}
/* put the original remaining length back into the buffer */
len = MQTTPacket_encode(buf, remain_len);
pack->pack_len = remain_len + len + 1;
b_log("pack length:%d\r\n", pack->pack_len);
pack->pack = _bMqttMalloc(pack->pack_len);
if (pack->pack == NULL)
{
b_log_e("mem error...\r\n");
goto exit;
}
pack->release = _bMqttFree;
pack->pack[0] = fix_byte;
memcpy(pack->pack + 1, buf, len);
/* 3. read the rest of the buffer using a callback to supply the rest of the data */
if (remain_len > 0 &&
(rc = _bMqttRead(pinstance, pack->pack + 1 + len, remain_len) != remain_len))
{
goto exit;
}
header.byte = fix_byte;
pack->type = header.bits.type;
return 0;
exit:
if (pack->pack)
{
_bMqttFree(pack->pack);
pack->pack = NULL;
pack->release = NULL;
}
return -1;
}
static void _bMqttTimerCb(void *arg)
{
bMqttSrvInstance_t *pinstance = (bMqttSrvInstance_t *)arg;
uint8_t buf[4];
if (pinstance->stat != B_MQTT_STA_INIT)
{
int len = MQTTSerialize_pingreq(buf, sizeof(buf));
if ((TICK_DIFF_BIT32(pinstance->last_recv, bHalGetSysTick())) >
MS2TICKS(pinstance->keep_alive * 1000))
{
pbMqttInstance->stat = B_MQTT_STA_INIT;
}
else
{
bSend(pinstance->sock_fd, buf, len, NULL);
}
}
}
PT_THREAD(_bMqttTaskFunc)(struct pt *pt, void *arg)
{
static int sock_fd = -1;
static uint8_t mqtt_step_f = 0;
int pack_len = 0;
uint8_t *pbuf = NULL;
uint32_t buf_len = 0;
bMqttSrvInstance_t *pinstance = (bMqttSrvInstance_t *)arg;
bMqttPack_t pack;
bMqttEvent_t evt = B_MQTT_EVT_INVALID;
bMqttEvtParam_t param;
MQTTString topic_name;
B_TASK_INIT_BEGIN();
// ...
B_TASK_INIT_END();
PT_BEGIN(pt);
while (1)
{
if (pinstance == NULL)
{
bTaskRestart(pt);
}
if (pinstance->stat == B_MQTT_STA_INIT)
{
sock_fd = bSocket(B_TRANS_CONN_TCP, _bMqttTransCb, pinstance);
if (SOCKFD_IS_INVALID(sock_fd))
{
bTaskRestart(pt);
}
b_log("connect:%s:%d\r\n", pinstance->host, pinstance->port);
bConnect(sock_fd, pinstance->host, pinstance->port);
PT_WAIT_UNTIL(pt, bSockIsWriteable(sock_fd), MS2TICKS(3000));
if (PT_WAIT_IS_TIMEOUT(pt))
{
b_log_e("connect timeout\r\n");
SOCKET_SHUTDOWN(pt, sock_fd);
bTaskRestart(pt);
}
pinstance->stat = B_MQTT_STA_TCP_CONNECTED;
pinstance->sock_fd = sock_fd;
mqtt_step_f = 0;
b_log("tcp connected success!\r\n");
}
else
{
PT_WAIT_UNTIL(
pt, (bSockIsReadable(sock_fd) || (pinstance->stat != B_MQTT_STA_TCP_CONNECTED)),
1000);
if (pinstance->stat != B_MQTT_STA_TCP_CONNECTED)
{
b_log("tcp disconnect...\r\n");
bTimerStop(pinstance->timer_id);
_bMqttSubscribeReset();
SOCKET_SHUTDOWN(pt, sock_fd);
bTaskRestart(pt);
}
else if (bSockIsReadable(sock_fd))
{
if (0 == _bMqttReadPacket(pinstance, &pack))
{
evt = B_MQTT_EVT_INVALID;
pinstance->last_recv = bHalGetSysTick();
b_log("packet type: %d\r\n", pack.type);
switch (pack.type)
{
case CONNACK:
{
mqtt_step_f |= MQTT_STEP_CONN;
evt = B_MQTT_EVT_CONN;
bTimerStart(pinstance->timer_id, pinstance->keep_alive * 1000 / 3);
}
break;
case PUBACK:
{
; // todo qos = 1
}
break;
case SUBACK:
{
_bMqttSubscribeAckHandle(&pack);
}
break;
case PUBLISH:
{
if (MQTTDeserialize_publish(
¶m.pub.dup, ¶m.pub.qos, ¶m.pub.retained,
¶m.pub.pack_id, &topic_name,
(unsigned char **)¶m.pub.payload,
(int *)¶m.pub.payload_len, pack.pack, pack.pack_len) == 1)
{
param.pub.topic = topic_name.lenstring.data;
param.pub.topic_len = topic_name.lenstring.len;
evt = B_MQTT_EVT_PUB;
}
break;
}
case PUBREC:
case PUBREL:
{
// todo qos = 2
break;
}
case PUBCOMP:
break;
case PINGRESP:
break;
}
if (evt != B_MQTT_EVT_INVALID)
{
pinstance->cb(evt, ¶m, pinstance->user_data);
}
if (pack.release && pack.pack)
{
pack.release(pack.pack);
pack.pack = NULL;
}
}
}
else
{
if ((mqtt_step_f & MQTT_STEP_CONN) == 0)
{
_bMqttConnect(pinstance);
}
else
{
_bMqttSubscribe(pinstance);
}
}
}
}
PT_END(pt);
}
/**
* \}
*/
/**
* \addtogroup MQTT_Exported_Functions
* \{
*/
int bMqttSrvStartWithCfg(pbMqttCallback_t cb, void *arg)
{
bMqttSrvInstance_t *pinstance = NULL;
if (pbMqttInstance != NULL || cb == NULL)
{
return -1;
}
pinstance = bCalloc(1, sizeof(bMqttSrvInstance_t));
if (pinstance == NULL)
{
return -1;
}
pinstance->cb = cb;
pinstance->user_data = arg;
pinstance->packet_id = 1;
pinstance->keep_alive = MQTT_KEEP_ALIVE;
pinstance->pbroker = bStrDup(MQTT_BROKER_URL);
pinstance->client_id = bStrDup(MQTT_CLIENT_ID);
pinstance->user_name = bStrDup(MQTT_USER_NAME);
pinstance->user_passwd = bStrDup(MQTT_USER_PASSWD);
if (IS_NULL(pinstance->pbroker) || IS_NULL(pinstance->user_name) ||
IS_NULL(pinstance->user_passwd) || IS_NULL(pinstance->client_id))
{
goto fail;
}
int ret = _bMqttParseUrl(pinstance->pbroker, &pinstance->host, &pinstance->port,
&pinstance->is_mqtts);
if (ret < 0)
{
goto fail;
}
pinstance->task_id = bTaskCreate("mqtt", _bMqttTaskFunc, pinstance, &bMqttTaskAttr);
if (pinstance->task_id <= 0)
{
goto fail;
}
pinstance->timer_id = bTimerCreate(_bMqttTimerCb, B_TIMER_PERIODIC, pinstance, &bMqttTimerAttr);
#ifdef MQTT_SUB_TOPIC_DEFAULT
char *topic_filter = MQTT_SUB_TOPIC_DEFAULT;
int qos = MQTT_QOS_DEFAULT;
if (0 != _bMqttAddSubscribe(pinstance, (const char **)&topic_filter, &qos, 1))
{
goto fail;
}
#endif
pinstance->stat = B_MQTT_STA_INIT;
pbMqttInstance = pinstance;
return 0;
fail:
if (pinstance->task_id > 0)
{
bTaskRemove(pinstance->task_id);
}
if (pinstance->timer_id > 0)
{
bTimerDelete(pinstance->timer_id);
}
if (pinstance->host)
{
_bMqttFree(pinstance->host);
}
if (pinstance->client_id)
{
_bMqttFree(pinstance->client_id);
}
if (pinstance->user_passwd)
{
_bMqttFree(pinstance->user_passwd);
}
if (pinstance->user_name)
{
_bMqttFree(pinstance->user_name);
}
if (pinstance->pbroker)
{
_bMqttFree(pinstance->pbroker);
}
return -1;
}
void bMqttSrvDestroy()
{
bMqttSrvInstance_t *pinstance = pbMqttInstance;
if (pinstance == NULL)
{
return;
}
if (pinstance->task_id > 0)
{
bTaskRemove(pinstance->task_id);
}
if (pinstance->timer_id > 0)
{
bTimerDelete(pinstance->timer_id);
}
if (pinstance->host)
{
_bMqttFree(pinstance->host);
}
if (pinstance->client_id)
{
_bMqttFree(pinstance->client_id);
}
if (pinstance->user_passwd)
{
_bMqttFree(pinstance->user_passwd);
}
if (pinstance->user_name)
{
_bMqttFree(pinstance->user_name);
}
if (pinstance->pbroker)
{
_bMqttFree(pinstance->pbroker);
}
bMqttSubscribeNode_t *pnode = NULL;
struct list_head *pos = NULL;
list_for_each(pos, &bMqttSubscribeListHead)
{
if (pnode != NULL)
{
_bMqttFree(pnode);
pnode = NULL;
}
pnode = list_entry(pos, bMqttSubscribeNode_t, node);
_bMqttFree(pnode->pack);
pnode->pack = NULL;
__list_del(pos->prev, pos->next);
}
if (pnode != NULL)
{
_bMqttFree(pnode);
pnode = NULL;
}
}
/**
* \}
*/
/**
* \}
*/
/**
* \}
*/
/**
* \}
*/
#endif
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