Paho-MQTT 1.鏈接MQTT測試服務器，2鏈接阿里雲物聯網平臺

時間 2020-12-02

標籤 css linux git ubuntu windows 服務器網絡 session 函數測試欄目阿里巴巴简体版

原文原文鏈接

Paho-MQTT css

前往下載 https://gitee.com/mirrors/paho.mqtt.embedded-c?_from=gitee_searchlinux

我當前使用版本：git

連接：https://pan.baidu.com/s/1pkUyD2mcQlQQur2GZHryCw
提取碼：kcpo ubuntu

0. 簡介windows

有三個子項目：服務器

MQTTPacket-MQTT數據包的簡單反序列化，以及輔助函數
MQTTClient-高級C ++客戶端，再加上
MQTTClient-C-高級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。它們是高級庫的基礎，但也能夠單獨使用。主要取決於您對網絡的讀寫。網絡

該MQTTClient目錄包含下一級的C ++庫。該網絡代碼包含在單獨的類中，以便您能夠插入所選的網絡。當前有Linux，Arduino和mbed的實現。ARM mbed是第一個爲此平臺編寫的平臺，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。session

對於不支持C ++或約定的平臺，MQTTClient-C目錄包含與MQTTClient等效的C語言。函數

Paho嵌入式C工程提供瞭如下三個子項目：測試

MQTTPacket： 這裏提供MQTT數據包的序列化與反序列化，以及部分輔助函數。它們是高級庫的基礎，但也能夠單獨使用。主要取決於您對網絡的讀寫。MQTTClient： 封裝MQTTPacket生成的高級別C++客戶端程序。
- - 　大概意思就是若是你對MQTT源碼很熟悉，你能夠直接使用MQTTPacket的接口。
MQTTClient-C：封裝MQTTPacket生成的高級別C客戶端程序。

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，分別支持FreeRTOS和Linux系統。
src目錄提供MQTTClient的代碼實現能力，以及用於移植到FreeRTOS、cc3200和Linux的網絡驅動。

代碼編譯方法

mkdir mybuild
cd mybuild
cmake ..
make

添加兩個源文件，而後修改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. 鏈接MQTT測試服務器

使用的測試服務器：

aiot_c_demo.c

/** 這個例子是發佈消息到MQTT測試服務器 test.mosquitto.org 上去。 我windows上的MQTT客戶端軟件訂閱了該主題，因此能夠收到這裏發送的消息。 **/ #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，要否則鏈接服務器(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); // 在須要接收數據時, 都須要主動調用該函數
        printf("---1s--- \n "); } return rc; }

aiot_mqtt_sign.c 暫時爲空文件便可，鏈接阿里雲時纔會使用到。

先填好通訊貓軟件上的參數

注意，這裏填寫的發佈和訂閱的主題是和aiot_c_demo.c內的發佈訂閱的主題對應的。 MQTT，依靠主題來創建不一樣客戶端的關聯。

PS：通訊貓軟件下載地址

ubuntu內編譯程序，準備運行

結果:

2. 鏈接阿里雲物聯網平臺

這裏會使用到aiot_mqtt_sign.c

aiot_mqtt_sign.c加上內容吧，賦值黏貼拿去使用便可，這裏面的代碼能夠不用關心，主要是提供一個計算密碼的功能函數：

/* * 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 */ }