iOS - 获取 ARP 表 [英] iOS - Get ARP table

问题描述

我正在尝试构建网络扫描仪.我知道这个过程，所以我想 ping 网络中所有可用的主机，然后获取 ARP 表，这样我就可以映射每个 IP 的 MAC 地址.我在 Google 上搜索了 ARP 表，但没有找到如何实现此功能的任何指南.我还在 Stack Overflow 上发现了这些类似的问题:

I am trying to build a network scanner. I know the procedure so I want to ping all available hosts in the network and then get the ARP table so I can map the MAC address for each IP. I Googled for ARP table but I didn't find any guide how to implement this feature. I also found these similar questions on Stack overflow:

Link1

Link2

关于如何实现 ARP 功能的答案尚不清楚.这个有官方指南吗?Apple 是否批准 ARP 表功能?

The answer are unclear on how to implement the ARP feature. Is there any official guide for this one? Is Apple approving the ARP table feature?

推荐答案

10.2后更新

检查库这里

我终于搞定了，所以我将详细发布该过程以节省其他人的时间:

I finally got it working so I will post the procedure in detail to save some time for other guys:

1. 转到 Applications 并右键单击 Xcode -> Show package contents 并浏览到:Developer ▸ Platforms ▸ MacOSX.platform ▸ Developer ▸ SDKs ▸ MacOSX10.10.sdk ▸ usr ▸ include.从net"文件夹复制 route.h 和 if_types.h 并从netinet"文件夹复制 if_ether.h 到您的 Xcode项目.
2. 然后导入以下.m和.h文件:

1. Go to Applications and right click on Xcode -> Show package contents and browse to: Developer ▸ Platforms ▸ MacOSX.platform ▸ Developer ▸ SDKs ▸ MacOSX10.10.sdk ▸ usr ▸ include. From "net" folder copy the route.h and if_types.h and from the "netinet" folder copy the if_ether.h into your Xcode project.
2. Then import the following .m and .h files:

MacFinder.h

#import <Foundation/Foundation.h>
#include <sys/param.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/sysctl.h>

#include <net/if.h>
#include <net/if_dl.h>
#include "if_types.h"

#if TARGET_IPHONE_SIMULATOR
#include <net/route.h>
#else
#include "route.h"
#endif

#include "if_ether.h"
#include <netinet/in.h>


#include <arpa/inet.h>

#include <err.h>
#include <errno.h>
#include <netdb.h>

#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

@interface MacFinder : NSObject{

    int nflag;
}

-(NSString*) ip2mac: (char*)ip;

@end

MacFinder.m

#import "MacFinder.h"

@implementation MacFinder
-(NSString*) ip2mac: (char*)ip
{
    int  found_entry = 0;



    NSString *mAddr = nil;
    u_long addr = inet_addr(ip);
    int mib[6];
    size_t needed;
    char *host, *lim, *buf, *next;
    struct rt_msghdr *rtm;
    struct sockaddr_inarp *sin;
    struct sockaddr_dl *sdl;
    extern int h_errno;
    struct hostent *hp;

    mib[0] = CTL_NET;
    mib[1] = PF_ROUTE;
    mib[2] = 0;
    mib[3] = AF_INET;
    mib[4] = NET_RT_FLAGS;
    mib[5] = RTF_LLINFO;
    if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
        err(1, "route-sysctl-estimate");
    if ((buf = malloc(needed)) == NULL)
        err(1, "malloc");
    if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
        err(1, "actual retrieval of routing table");


    lim = buf + needed;
    for (next = buf; next < lim; next += rtm->rtm_msglen) {
        rtm = (struct rt_msghdr *)next;
        sin = (struct sockaddr_inarp *)(rtm + 1);
        sdl = (struct sockaddr_dl *)(sin + 1);
        if (addr) {
            if (addr != sin->sin_addr.s_addr)
                continue;
            found_entry = 1;
        }
        if (nflag == 0)
            hp = gethostbyaddr((caddr_t)&(sin->sin_addr),
                               sizeof sin->sin_addr, AF_INET);
        else
            hp = 0;
        if (hp)
            host = hp->h_name;
        else {
            host = "?";
            if (h_errno == TRY_AGAIN)
                nflag = 1;
        }



        if (sdl->sdl_alen) {

            u_char *cp = LLADDR(sdl);

            mAddr = [NSString stringWithFormat:@"%x:%x:%x:%x:%x:%x", cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]];


            //  ether_print((u_char *)LLADDR(sdl));
        }
        else

            mAddr = nil;



    }


    if (found_entry == 0) {
        return nil;
    } else {
        return mAddr;
    }




}
@end

1. 然后在你的 ViewController
中导入 MacFinder.h 文件
2. 示例如何将它用于您要查找 MAC 地址的每个主机:

1. Then import the MacFinder.h file in your ViewController
2. Example how to use it for each host you want to find the MAC Address:

MacFinder *mc = [[MacFinder alloc]init];NSString *mac = [mc ip2mac:"192.168.10.24"];NSLog(@"Mac:%@",mac);

如果您仍然遇到问题 这里是教程，这里是完整的工作项目(包括必要的文件)

If you still having trouble here is tutorial and here the full working project (Including the necessary files)

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