Paho-MQTT 1.連線MQTT測試伺服器,2連線阿里雲物聯網平臺
Paho-MQTT
前往下載 https://gitee.com/mirrors/paho.mqtt.embedded-c?_from=gitee_search
我當前使用版本:
連結:https://pan.baidu.com/s/1pkUyD2mcQlQQur2GZHryCw
提取碼:kcpo
0. 簡介
有三個子專案:
MQTTPacket-MQTT資料包的簡單反序列化,以及輔助函式
MQTTClient-高階C ++客戶端,再加上
MQTTClient-C-高階C客戶端(幾乎是C ++客戶端的克隆)
該MQTTPacket目錄中,有最小要求的最低水平C庫。這提供了簡單的序列化和反序列化例程。它們是高階庫的基礎,但也可以單獨使用。主要取決於您對網路的讀寫。
該MQTTClient目錄包含下一級的C ++庫。該網路程式碼包含在單獨的類中,以便您可以插入所選的網路。當前有Linux,Arduino和mbed的實現。ARM mbed是第一個為此平臺編寫的平臺,其中傳統的語言選擇是C ++,它說明了語言選擇。我已經寫了入門入門指南。
對於不支援C ++或約定的平臺,MQTTClient-C目錄包含與MQTTClient等效的C語言。
Paho嵌入式C工程提供了以下三個子專案:
- MQTTPacket: 這裡提供MQTT資料包的序列化與反序列化,以及部分輔助函式。它們是高階庫的基礎,但也可以單獨使用。主要取決於您對網路的讀寫。MQTTClient: 封裝MQTTPacket生成的高級別C++客戶端程式。
-
- 大概意思就是如果你對MQTT原始碼很熟悉,你可以直接使用MQTTPacket的介面。
-
- MQTTClient-C:封裝MQTTPacket生成的高級別C客戶端程式。
-
MQTTClient-C中包含:
├── CMakeLists.txt ├── samples │ ├── CMakeLists.txt │ ├── FreeRTOS │ └── linux ├── src │ ├── CMakeLists.txt │ ├── FreeRTOS │ ├── MQTTClient.c │ ├── MQTTClient.h │ ├── cc3200 │ └── linux └── test ├── CMakeLists.txt └── test1.c
- samples目錄提供FreeRTOS和linux兩個例程,分別支援FreeRTOS和Linux系統。
- src目錄提供MQTTClient的程式碼實現能力,以及用於移植到FreeRTOS、cc3200和Linux的網路驅動。
程式碼編譯方法
mkdir mybuild
cdmybuild
cmake ..
make
新增兩個原始檔,然後修改CMakeLists.txt
修改後的CMakeLists.txt:
add_executable(
aiot_c_demo
aiot_c_demo.c
aiot_mqtt_sign.c
)
target_link_libraries(aiot_c_demo paho-embed-mqtt3cc paho-embed-mqtt3c)
target_include_directories(aiot_c_demo PRIVATE "../../src" "../../src/linux")
target_compile_definitions(aiot_c_demo PRIVATE MQTTCLIENT_PLATFORM_HEADER=MQTTLinux.h)
1. 連線MQTT測試伺服器
使用的測試伺服器:
aiot_c_demo.c
/**
這個例子是釋出訊息到MQTT測試伺服器 test.mosquitto.org 上去。
我windows上的MQTT客戶端軟體訂閱了該主題,所以可以收到這裡傳送的訊息。
**/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "MQTTClient.h"
#include <unistd.h>
#define ADDRESS "test.mosquitto.org" // MQTT Test Server For Free
#define PORT 1883
#define CLIENTID // 客戶端ID
const char *subTopic = "/publish/TEST/111";
const char *pubTopic = "/publish/TEST/000";
char clientId[150] = {0};
char username[65] = {0};
char password[65] = {0};
unsigned char sendbuf[1000];
unsigned char readbuf[1000];
void messageArrived(MessageData* md)
{
MQTTMessage* message = md->message;
printf("\nIOT Cloud Message Arrived! \n");
printf("%.*s\n", md->topicName->lenstring.len, md->topicName->lenstring.data);
printf("%.*s\n\n", (int)message->payloadlen, (char*)message->payload);
}
int main(int argc, char* argv[])
{
Network net;
MQTTClient client;
char *host = ADDRESS;
short port = PORT;
/* network init and establish network */
NetworkInit(&net);
int rc = NetworkConnect(&net, host, port);
if(!rc){
printf("\nNetworkConnect Success \n");
}
else{
printf("\nNetworkConnect ERR \n\n");
}
/**************MQTT Client Init***************/
MQTTClientInit(&client, &net, 1000, sendbuf, sizeof(sendbuf), readbuf, sizeof(readbuf));
/* set the default message handler */
client.defaultMessageHandler = messageArrived;
/**************MQTTConnect***************/
/* set mqtt connect parameter */
MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
data.willFlag = 0;
//data.MQTTVersion = 3; 版本號不要指定,要不然連線伺服器(執行MQTTConnect時)會返回失敗
data.clientID.cstring = clientId; //clientId;
data.username.cstring = username;
data.password.cstring = password;
data.keepAliveInterval = 60;
data.cleansession = 1;
printf("......Try to Connect to %s %d, ......\n", host, port);
rc = MQTTConnect(&client, &data);
if(!rc)
printf("MQTTConnect %d, Connect MQTT IoT Cloud Success!\n", rc);
else
printf("MQTTConnect %d, Connect ERR!\n", rc);
/**************MQTTSubscribe***************/
rc = MQTTSubscribe(&client, subTopic, 1, messageArrived);
if(!rc)
printf("MQTTSubscribe %d, MQTTSubscribe MQTT IoT Cloud Success!\n", rc);
else
printf("MQTTSubscribe %d, MQTTSubscribe ERR!\n", rc);
/**************MQTTPublish***************/
#define mqttdata "hello mqtt"
MQTTMessage msg = {
QOS1,
1, // retained .
0,
0, // id
mqttdata,
strlen(mqttdata),
};
msg.id++;
rc = MQTTPublish(&client, pubTopic, &msg);
if(!rc)
printf("MQTTPublish %d, id = %d MQTTPublish MQTT IoT Cloud Success! \n", rc, msg.id);
else
printf("MQTTPublish %d, MQTTPublish ERR!\n", rc);
while(1){
MQTTYield(&client, 1000); // 在需要接收資料時, 都需要主動呼叫該函式
printf("---1s--- \n ");
}
return rc;
}
aiot_mqtt_sign.c 暫時為空檔案即可, 連線阿里雲時才會使用到。
先填好通訊貓軟體上的引數
注意,這裡填寫的釋出和訂閱的主題是和aiot_c_demo.c內的釋出訂閱的主題對應的。 MQTT,依靠主題來建立不同客戶端的關聯。
PS:通訊貓軟體下載地址
ubuntu內編譯程式,準備執行
結果:
2. 連線阿里雲物聯網平臺
這裡會使用到aiot_mqtt_sign.c
aiot_mqtt_sign.c加上內容吧, 賦值黏貼拿去使用即可,這裡面的程式碼可以不用關心,主要是提供一個計算密碼的功能函式:
/*
* Copyright (C) 2015-2019 Alibaba Group Holding Limited
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#define PRODUCTKEY_MAXLEN (20)
#define DEVICENAME_MAXLEN (32)
#define DEVICESECRET_MAXLEN (64)
#define SIGN_SOURCE_MAXLEN (200)
#define CLIENTID_MAXLEN (150)
#define USERNAME_MAXLEN (64)
#define PASSWORD_MAXLEN (65)
#define TIMESTAMP_VALUE "2524608000000"
#define MQTT_CLINETID_KV "|timestamp=2524608000000,_v=paho-c-1.0.0,securemode=3,signmethod=hmacsha256,lan=C|"
static void utils_hmac_sha256(const uint8_t *msg, uint32_t msg_len, const uint8_t *key, uint32_t key_len, uint8_t output[32]);
static void _hex2str(uint8_t *input, uint16_t input_len, char *output)
{
char *zEncode = "0123456789ABCDEF";
int i = 0, j = 0;
for (i = 0; i < input_len; i++) {
output[j++] = zEncode[(input[i] >> 4) & 0xf];
output[j++] = zEncode[(input[i]) & 0xf];
}
}
int aiotMqttSign(const char *productKey, const char *deviceName, const char *deviceSecret,
char clientId[150], char username[64], char password[65])
{
char deviceId[PRODUCTKEY_MAXLEN + DEVICENAME_MAXLEN + 2] = {0};
char macSrc[SIGN_SOURCE_MAXLEN] = {0};
uint8_t macRes[32] = {0};
int res;
/* check parameters */
if (productKey == NULL || deviceName == NULL || deviceSecret == NULL ||
clientId == NULL || username == NULL || password == NULL) {
return -1;
}
if ((strlen(productKey) > PRODUCTKEY_MAXLEN) || (strlen(deviceName) > DEVICENAME_MAXLEN) ||
(strlen(deviceSecret) > DEVICESECRET_MAXLEN)) {
return -1;
}
/* setup deviceId */
memcpy(deviceId, deviceName, strlen(deviceName));
memcpy(deviceId + strlen(deviceId), "&", strlen("&"));
memcpy(deviceId + strlen(deviceId), productKey, strlen(productKey));
/* setup clientid */
memcpy(clientId, deviceId, strlen(deviceId));
memcpy(clientId + strlen(deviceId), MQTT_CLINETID_KV, strlen(MQTT_CLINETID_KV));
memset(clientId + strlen(deviceId) + strlen(MQTT_CLINETID_KV), 0, 1);
/* setup username */
memcpy(username, deviceId, strlen(deviceId));
memset(username + strlen(deviceId), 0, 1);
/* setup password */
memcpy(macSrc, "clientId", strlen("clientId"));
memcpy(macSrc + strlen(macSrc), deviceId, strlen(deviceId));
memcpy(macSrc + strlen(macSrc), "deviceName", strlen("deviceName"));
memcpy(macSrc + strlen(macSrc), deviceName, strlen(deviceName));
memcpy(macSrc + strlen(macSrc), "productKey", strlen("productKey"));
memcpy(macSrc + strlen(macSrc), productKey, strlen(productKey));
memcpy(macSrc + strlen(macSrc), "timestamp", strlen("timestamp"));
memcpy(macSrc + strlen(macSrc), TIMESTAMP_VALUE, strlen(TIMESTAMP_VALUE));
utils_hmac_sha256((uint8_t *)macSrc, strlen(macSrc), (uint8_t *)deviceSecret,
strlen(deviceSecret), macRes);
memset(password, 0, PASSWORD_MAXLEN);
_hex2str(macRes, sizeof(macRes), password);
return 0;
}
/******************************
* hmac-sha256 implement below
******************************/
#define SHA256_KEY_IOPAD_SIZE (64)
#define SHA256_DIGEST_SIZE (32)
/**
* \brief SHA-256 context structure
*/
typedef struct {
uint32_t total[2]; /*!< number of bytes processed */
uint32_t state[8]; /*!< intermediate digest state */
unsigned char buffer[64]; /*!< data block being processed */
int is224; /*!< 0 => SHA-256, else SHA-224 */
} iot_sha256_context;
typedef union {
char sptr[8];
uint64_t lint;
} u_retLen;
/*
* 32-bit integer manipulation macros (big endian)
*/
#ifndef GET_UINT32_BE
#define GET_UINT32_BE(n,b,i) \
do { \
(n) = ( (uint32_t) (b)[(i) ] << 24 ) \
| ( (uint32_t) (b)[(i) + 1] << 16 ) \
| ( (uint32_t) (b)[(i) + 2] << 8 ) \
| ( (uint32_t) (b)[(i) + 3] ); \
} while( 0 )
#endif
#ifndef PUT_UINT32_BE
#define PUT_UINT32_BE(n,b,i) \
do { \
(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
(b)[(i) + 3] = (unsigned char) ( (n) ); \
} while( 0 )
#endif
static void utils_sha256_zeroize(void *v, uint32_t n)
{
volatile unsigned char *p = v;
while (n--) {
*p++ = 0;
}
}
void utils_sha256_init(iot_sha256_context *ctx)
{
memset(ctx, 0, sizeof(iot_sha256_context));
}
void utils_sha256_free(iot_sha256_context *ctx)
{
if (NULL == ctx) {
return;
}
utils_sha256_zeroize(ctx, sizeof(iot_sha256_context));
}
void utils_sha256_starts(iot_sha256_context *ctx)
{
int is224 = 0;
ctx->total[0] = 0;
ctx->total[1] = 0;
if (is224 == 0) {
/* SHA-256 */
ctx->state[0] = 0x6A09E667;
ctx->state[1] = 0xBB67AE85;
ctx->state[2] = 0x3C6EF372;
ctx->state[3] = 0xA54FF53A;
ctx->state[4] = 0x510E527F;
ctx->state[5] = 0x9B05688C;
ctx->state[6] = 0x1F83D9AB;
ctx->state[7] = 0x5BE0CD19;
}
ctx->is224 = is224;
}
static const uint32_t K[] = {
0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
};
#define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
#define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))
#define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
#define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
#define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
#define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
#define F0(x,y,z) ((x & y) | (z & (x | y)))
#define F1(x,y,z) (z ^ (x & (y ^ z)))
#define R(t) \
( \
W[t] = S1(W[t - 2]) + W[t - 7] + \
S0(W[t - 15]) + W[t - 16] \
)
#define P(a,b,c,d,e,f,g,h,x,K) \
{ \
temp1 = h + S3(e) + F1(e,f,g) + K + x; \
temp2 = S2(a) + F0(a,b,c); \
d += temp1; h = temp1 + temp2; \
}
void utils_sha256_process(iot_sha256_context *ctx, const unsigned char data[64])
{
uint32_t temp1, temp2, W[64];
uint32_t A[8];
unsigned int i;
for (i = 0; i < 8; i++) {
A[i] = ctx->state[i];
}
for (i = 0; i < 64; i++) {
if (i < 16) {
GET_UINT32_BE(W[i], data, 4 * i);
} else {
R(i);
}
P(A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i], K[i]);
temp1 = A[7];
A[7] = A[6];
A[6] = A[5];
A[5] = A[4];
A[4] = A[3];
A[3] = A[2];
A[2] = A[1];
A[1] = A[0];
A[0] = temp1;
}
for (i = 0; i < 8; i++) {
ctx->state[i] += A[i];
}
}
void utils_sha256_update(iot_sha256_context *ctx, const unsigned char *input, uint32_t ilen)
{
size_t fill;
uint32_t left;
if (ilen == 0) {
return;
}
left = ctx->total[0] & 0x3F;
fill = 64 - left;
ctx->total[0] += (uint32_t) ilen;
ctx->total[0] &= 0xFFFFFFFF;
if (ctx->total[0] < (uint32_t) ilen) {
ctx->total[1]++;
}
if (left && ilen >= fill) {
memcpy((void *)(ctx->buffer + left), input, fill);
utils_sha256_process(ctx, ctx->buffer);
input += fill;
ilen -= fill;
left = 0;
}
while (ilen >= 64) {
utils_sha256_process(ctx, input);
input += 64;
ilen -= 64;
}
if (ilen > 0) {
memcpy((void *)(ctx->buffer + left), input, ilen);
}
}
static const unsigned char sha256_padding[64] = {
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
void utils_sha256_finish(iot_sha256_context *ctx, uint8_t output[32])
{
uint32_t last, padn;
uint32_t high, low;
unsigned char msglen[8];
high = (ctx->total[0] >> 29)
| (ctx->total[1] << 3);
low = (ctx->total[0] << 3);
PUT_UINT32_BE(high, msglen, 0);
PUT_UINT32_BE(low, msglen, 4);
last = ctx->total[0] & 0x3F;
padn = (last < 56) ? (56 - last) : (120 - last);
utils_sha256_update(ctx, sha256_padding, padn);
utils_sha256_update(ctx, msglen, 8);
PUT_UINT32_BE(ctx->state[0], output, 0);
PUT_UINT32_BE(ctx->state[1], output, 4);
PUT_UINT32_BE(ctx->state[2], output, 8);
PUT_UINT32_BE(ctx->state[3], output, 12);
PUT_UINT32_BE(ctx->state[4], output, 16);
PUT_UINT32_BE(ctx->state[5], output, 20);
PUT_UINT32_BE(ctx->state[6], output, 24);
if (ctx->is224 == 0) {
PUT_UINT32_BE(ctx->state[7], output, 28);
}
}
void utils_sha256(const uint8_t *input, uint32_t ilen, uint8_t output[32])
{
iot_sha256_context ctx;
utils_sha256_init(&ctx);
utils_sha256_starts(&ctx);
utils_sha256_update(&ctx, input, ilen);
utils_sha256_finish(&ctx, output);
utils_sha256_free(&ctx);
}
static void utils_hmac_sha256(const uint8_t *msg, uint32_t msg_len, const uint8_t *key, uint32_t key_len, uint8_t output[32])
{
iot_sha256_context context;
uint8_t k_ipad[SHA256_KEY_IOPAD_SIZE]; /* inner padding - key XORd with ipad */
uint8_t k_opad[SHA256_KEY_IOPAD_SIZE]; /* outer padding - key XORd with opad */
int32_t i;
if ((NULL == msg) || (NULL == key) || (NULL == output)) {
return;
}
if (key_len > SHA256_KEY_IOPAD_SIZE) {
return;
}
/* start out by storing key in pads */
memset(k_ipad, 0, sizeof(k_ipad));
memset(k_opad, 0, sizeof(k_opad));
memcpy(k_ipad, key, key_len);
memcpy(k_opad, key, key_len);
/* XOR key with ipad and opad values */
for (i = 0; i < SHA256_KEY_IOPAD_SIZE; i++) {
k_ipad[i] ^= 0x36;
k_opad[i] ^= 0x5c;
}
/* perform inner SHA */
utils_sha256_init(&context); /* init context for 1st pass */
utils_sha256_starts(&context); /* setup context for 1st pass */
utils_sha256_update(&context, k_ipad, SHA256_KEY_IOPAD_SIZE); /* start with inner pad */
utils_sha256_update(&context, msg, msg_len); /* then text of datagram */
utils_sha256_finish(&context, output); /* finish up 1st pass */
/* perform outer SHA */
utils_sha256_init(&context); /* init context for 2nd pass */
utils_sha256_starts(&context); /* setup context for 2nd pass */
utils_sha256_update(&context, k_opad, SHA256_KEY_IOPAD_SIZE); /* start with outer pad */
utils_sha256_update(&context, output, SHA256_DIGEST_SIZE); /* then results of 1st hash */
utils_sha256_finish(&context, output); /* finish up 2nd pass */
}
aiot_c_demo.c