Mac开发之获取设备名字、IP地址和MAC地址

在项目中遇到需要获取设备名字、IP地址和MAC地址信息，之前用NSHost，结果发现不是很稳定，就放弃了，另外想出了几个方法，下面记录一下：

ViewController.h

//
//  ViewController.h
//  DeviceMACAddress
//
//  Created by Chen Ling on 18/7/2018.
//  Copyright © 2018 Chen Ling. All rights reserved.
//

#import 

@interface ViewController : UIViewController

@property (weak, nonatomic) IBOutlet UILabel *deviceNameLable;
@property (weak, nonatomic) IBOutlet UILabel *deviceIPAddressLable;
@property (weak, nonatomic) IBOutlet UILabel *deviceMACAddressLable;

@end

ViewController.m

//
//  ViewController.m
//  DeviceMACAddress
//
//  Created by Chen Ling on 18/7/2018.
//  Copyright © 2018 Chen Ling. All rights reserved.
//

#import "ViewController.h"
#import 
#import 
#import 
#import 
#import 
#import 
#import 

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    _deviceNameLable.text = [self getDeviceName];
    _deviceIPAddressLable.text = [self getDeviceIPAddress];
    _deviceMACAddressLable.text = [self getDeviceMacAddress];
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - Gets the device name
- (NSString *)getDeviceName {
    
#if (TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE)
    return [NSString stringWithFormat:@"%@",[UIDevice currentDevice].name];
#else   // iOS平台
    return [NSString stringWithFormat:@"%@",[NSHost currentHost].localizedName];
#endif  // macOS平台
    
}


#pragma mark - Get the device IP address
- (NSString *)getDeviceIPAddress {
    NSString *address = @"an error occurred when obtaining ip address";
    struct ifaddrs *interfaces = NULL;
    struct ifaddrs *temp_addr = NULL;
    int success = 0;
    
    success = getifaddrs(&interfaces);
    
    if (success == 0) { // 0 表示获取成功
        
        temp_addr = interfaces;
        while (temp_addr != NULL) {
            
            if( temp_addr->ifa_addr->sa_family == AF_INET) {
                // Check if interface is en0 which is the wifi connection on the iPhone
                if ([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
                    // Get NSString from C String
                    struct sockaddr_in *sockaddr = (struct sockaddr_in *)temp_addr->ifa_addr;
                    address = [NSString stringWithUTF8String:inet_ntoa(sockaddr->sin_addr)];
                }
            }
            
            temp_addr = temp_addr->ifa_next;
        }
    }
    
    freeifaddrs(interfaces);
    
    NSLog(@"手机的IP是：%@", address);
    return address;
}


#pragma mark - Get the device MAC address
- (NSString *) getDeviceMacAddress

{
    
    int                 mib[6];
    size_t              len;
    char                *buf;
    unsigned char       *ptr;
    struct if_msghdr    *ifm;
    struct sockaddr_dl  *sdl;
    
    mib[0] = CTL_NET;
    mib[1] = AF_ROUTE;
    mib[2] = 0;
    mib[3] = AF_LINK;
    mib[4] = NET_RT_IFLIST;
    
    if ((mib[5] = if_nametoindex("en0")) == 0) {
        printf("Error: if_nametoindex error/n");
        return NULL;
    }
    
    if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
        printf("Error: sysctl, take 1/n");
        return NULL;
    }
    
    if ((buf = malloc(len)) == NULL) {
        printf("Could not allocate memory. error!/n");
        return NULL;
    }
    
    if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
        printf("Error: sysctl, take 2");
        return NULL;
    }
    
    
    ifm = (struct if_msghdr *)buf;
    
    sdl = (struct sockaddr_dl *)(ifm + 1);
    
    ptr = (unsigned char *)LLADDR(sdl);
    
    
    NSString *outstring = [NSString stringWithFormat:@"%02x:%02x:%02x:%02x:%02x:%02x", *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)];
    
    // release pointer
    free(buf);
    
    return [outstring lowercaseString];
}

@end

核心代码iOS和OSX通用，改一下UI就可以 了，运行结果：

iOS：

OSX: 

下面说说另外一种方法，用命令行获取设备IP地址和MAC地址，思路是ifconfig命令，获取en0的信息，然后筛选出IP和MAC：

#pragma mark - Another way to get the device IP address
- (NSString *)getIPAddress {
    
    char ipAddress[16];
    
    if ([self getIPAddressCommandResult:ipAddress] == -1) {
        NSLog(@"获取IP地址失败");
    }
    
    return [NSString stringWithUTF8String:ipAddress];
}

- (int)getIPAddressCommandResult:(char *)result {
    
    char buffer[16];
    FILE* pipe = popen("ifconfig en0 | grep inet' ' | cut -d' ' -f 2", "r");
    if (!pipe)
        return -1;
    while(!feof(pipe)) {
        if(fgets(buffer, 1024, pipe)){
            //strcat(result, buffer);
            strncpy(result, buffer, sizeof(buffer) - 1);
            result[sizeof(buffer) - 1] = '\0';
        }
    }
    pclose(pipe);
    return 0;
}


#pragma mark - Another way to get the device MAC address
- (NSString *)getMacAddress {
    
    char macAddress[18];
    
    if ([self getMACAddressCommandResult:macAddress] == -1) {
        NSLog(@"获取MAC地址失败");
    }
    
    return [NSString stringWithUTF8String:macAddress];
}

- (int)getMACAddressCommandResult:(char *)result {
    
    char buffer[18];
    FILE* pipe = popen("ifconfig en0 | grep ether | cut -d' ' -f 2", "r");
    if (!pipe)
        return -1;
    while(!feof(pipe)) {
        if(fgets(buffer, 1024, pipe)){
            //strcat(result, buffer);
            strncpy(result, buffer, sizeof(buffer) - 1);
            result[sizeof(buffer) - 1] = '\0';
        }
    }
    pclose(pipe);
    return 0;
}