IOS 手机端搜索硬件设备 --- 物联网

#include<stdio.h>

#include<stdlib.h>

#include<string.h>

#include<errno.h>

#include<sys/types.h>

#include<sys/socket.h>

#include<netinet/in.h>

#include<arpa/inet.h>

#include<unistd.h>

//pch 文件导入

//扫描本地设备 --- 智能家居

-(void)scanLocalDevice

{

NSLog(@"开始扫描本地设备");

setvbuf(stdout, NULL, _IONBF, 0); // 不要缓冲区

fflush(stdout); // 清除缓冲区

int sock = -1;

//AF_INET : #define AF_INET 2 // internetwork: udp, tcp, etc.

// SOCK_DGRAM是基于UDP的，专门用于局域网，基于广播

// 0 : 调用的协议

if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1)

{

return;

}

const int opt = 1;

//设置该套接字为广播类型，

int nb = 0;

nb = setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&opt, sizeof(opt));

struct sockaddr_in addrto;

bzero(&addrto, sizeof(struct sockaddr_in));

addrto.sin_family=AF_INET;

addrto.sin_addr.s_addr=htonl(INADDR_BROADCAST); // //广播地址：255.255.255.255

addrto.sin_port=htons(1025);

int nlen=sizeof(addrto);

while(1)

{

totalSearchTime += 1;

NSLog(@"-->%d",totalSearchTime);

sleep(1);

//从广播地址发送消息

char smsg[] = {"Are You Espressif IOT Smart Device?"};//与硬件约定的响应消息硬件收到广播之后主动广播回主动发送自己的mac的地址和ip地址

long ret=sendto(sock, smsg, strlen(smsg), 0, (struct sockaddr*)&addrto, nlen);

if(ret<0){

}

else{

socklen_t size;

char buf[MAXDATASIZE];

memset(buf, 0, MAXDATASIZE);

recvfrom(sock,buf,MAXDATASIZE,0,(struct sockaddr *)&addrto,&size);

NSString *str = [NSString stringWithFormat:@"%s",buf];

NSArray * arry = [str componentsSeparatedByString:@" "];

NSString *tempstr = arry[1];

NSString *ip = arry[2];

NSRange range = [tempstr rangeOfString:@"."];

range.length = range.location;

range.location = 0;

range.location=range.length+1;

range.length = [tempstr length] - range.location;

NSString *mac = [tempstr substringWithRange:range];

NSArray *arr = [NSArray arrayWithObjects:ip,mac, nil];

NSLog(@"-----------> 扫描到的IP 和 MAC --->IP = %@ Mac ＝ %@",ip,mac);

[ListArray addObject:arr];

if (totalSearchTime == 20) {

totalSearchTime = 0;

[self getEqupmentIP];

break;

}

巴特西

IOS 手机端搜索硬件设备 --- 物联网

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