Linux下c語言模擬貝殼物聯設備在線

開發環境:Virtualbox ubuntu 14.04

使用說明:

1.下載使用安裝cJSON
2.將貝殼物聯對應設備的ID和APIKEY替換後，直接make運行
	#define PASSWORD	"********"	//管理員密碼，可以有權限執行關機指令等
3.在"請輸入指令"/“輸入自定義指令”處，輸入“reboot”，即可遠程重啓電腦

bigiot.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <pthread.h>
#include <cjson/cJSON.h>

#define DOMAIN	"www.bigiot.net"
#define PORT	8181
#define IP		"121.42.180.30"
#define ID		"xxxx"
#define APIKEY	"xxxxxxxx"

#define PASSWORD	"xxxxxxxx"

void *pthread_keepalive(void *);
void *pthread_handler(void *);

struct task {
	pthread_t tidp;
	int micro_seconds;
	void * (*start_rtn)(void *);
};

struct task task_tbl[] = {
	{ 0, 30000000, pthread_keepalive },
	{ 0, 100000, pthread_handler },
};

int s;
int ret;
struct sockaddr_in bigiot_addr;
char buf[1024];
cJSON *cjson = NULL;                                                                                   
char *str_cjson = NULL;

void show_cjson(void)
{
	cjson = cJSON_Parse(buf);
    str_cjson = cJSON_PrintUnformatted(cjson);
     
    printf("%s\n", str_cjson);
}

struct cmd_oper {
	char *cmd;
	void (* fun)();
};

void reboot(void)
{
	system("echo "PASSWORD" | sudo -S reboot");
}

struct cmd_oper cmd_oper_tbl[] = {
	{ "reboot", reboot },
};

void cmd_handler(void)
{
	char *method = NULL;
	char *cmd = NULL;
	int i;

	cjson = cJSON_Parse(buf);
#if 0
	printf("%s\n", cJSON_GetObjectItem(cjson, "M")->valuestring);
	printf("%s\n", cJSON_GetObjectItem(cjson, "ID")->valuestring);
	printf("%s\n", cJSON_GetObjectItem(cjson, "NAME")->valuestring);
	printf("%s\n", cJSON_GetObjectItem(cjson, "C")->valuestring);
	printf("%s\n", cJSON_GetObjectItem(cjson, "T")->valuestring);
#else
	method = cJSON_GetObjectItem(cjson, "M")->valuestring;

	if (0 == strcmp(method, "say")) {
		cmd = cJSON_GetObjectItem(cjson, "C")->valuestring;

		for (i = 0; i < sizeof(cmd_oper_tbl) / sizeof(cmd_oper_tbl[0]); i ++) {
			if (0 == strcmp(cmd, cmd_oper_tbl[i].cmd)) {
				cmd_oper_tbl[i].fun();
				break;
			}
		}
	}

#endif
}

int main(int argc, char *argv[])
{
	cJSON *checkin = NULL;
	char *str_checkin = NULL;

	int i;

	s = socket(AF_INET, SOCK_STREAM, 0);
    if (s < 0) {
        exit(-1);
    }

	bigiot_addr.sin_family = AF_INET;
    bigiot_addr.sin_port = htons(PORT);

#if 0
	bigiot_addr.sin_addr.s_addr = inet_addr(IP);
#else
	struct hostent *h;

	h = gethostbyname(DOMAIN);

	printf("ip:");
	for (i = 0; h->h_addr_list[i]; i ++) {
		printf("%s\t", inet_ntoa(*(struct in_addr*)(h->h_addr_list[i])));
	}
	printf("\n");

    char *ip = inet_ntoa(*((struct in_addr *)h->h_addr_list[0]));

    bigiot_addr.sin_addr.s_addr = inet_addr(ip);
#endif

	ret = connect(s, (const struct sockaddr *)&bigiot_addr, sizeof(bigiot_addr));
    if (ret < 0) {
        exit(-2);
    } 
    
    memset(buf, 0, sizeof(buf));
    
    ret = recv(s, buf, sizeof(buf), 0);
    if (ret > 0) {
		show_cjson();
    }

	checkin = cJSON_CreateObject();
    
    if (NULL == checkin) {
        printf("cJSON error!\n");
        exit(-1);
    }
    
    cJSON_AddStringToObject(checkin, "M", "checkin"); 
	cJSON_AddStringToObject(checkin, "ID", ID);
	cJSON_AddStringToObject(checkin, "K", APIKEY);
 
    str_checkin = cJSON_PrintUnformatted(checkin);
    
    if (NULL == str_checkin) {
        printf("cJSON error!\n");
        exit(-1);
    }

	strcat(str_checkin, "\n");

    ret = send(s, str_checkin, strlen(str_checkin), 0);
    
    if (ret < 0) {
        printf("send error!\n");
        exit(-3);
    }
	
	printf("%s", str_checkin);
    
    ret = recv(s, buf, sizeof(buf), 0);
    if (ret > 0) {
		show_cjson();
    }

	for (i = 0; i < sizeof(task_tbl) / sizeof(task_tbl[0]); i ++) {
		ret = pthread_create(&task_tbl[i].tidp,
							NULL,
							task_tbl[i].start_rtn,
							&task_tbl[i].micro_seconds);

		if (ret) {
			printf("Create pthread error:%d\n", i);
			
			exit(-1);
		}
	}

	for (i = 0; i < sizeof(task_tbl) / sizeof(task_tbl[0]); i ++) {
		pthread_join(task_tbl[i].tidp, NULL);
	}	

	close(s);

	return 0;
}

void *pthread_keepalive(void *arg)
{
	cJSON *beat = NULL;
	char *str_beat = NULL;

	beat = cJSON_CreateObject();

	if (NULL == beat) {
		printf("cJSON error!\n");
		exit(-1);
	}

	cJSON_AddStringToObject(beat, "M", "beat");

	str_beat = cJSON_PrintUnformatted(beat);

	if (NULL == str_beat) {
		printf("cJSON error!\n");
		exit(-1);
	}

	strcat(str_beat, "\n");

	while (1) {
		ret = send(s, str_beat, strlen(str_beat), 0);
		if (ret < 0) {
			printf("send error!\n");
			exit(-3);
	    }

		printf("%s", str_beat);

		usleep(*(int *)arg);
	}

	return NULL;
}

void *pthread_handler(void *arg)
{
	cJSON *cjson = NULL;
	char *str_cjson = NULL;

	while (1) {
		memset(buf, 0, sizeof(buf));

		ret = recv(s, buf, sizeof(buf), 0);
         
        if (ret > 0) {
			show_cjson();
			
			cmd_handler();
        }

		usleep(*(int *)arg);
	}

	return NULL;
}

Makefile

all:
	gcc bigiot.c -o bigiot -lpthread -lcjson -lm
	export LD_LIBRARY_PATH=/usr/local/lib && ./bigiot
	rm -rf bigiot

clean:
	rm -rf bigiot

gethostbyname的域名解析問題