• ARPSpoofing教程(三)


       1:  #include"pcap.h"
       2:  //每次捕获到数据包时,libpcap都会自动调用这个回调函数
       3:  void packet_handler(u_char *param,const pcap_pkthdr*header,const u_char *ptk_data){
       4:      
       5:      char timestr[16];
       6:      //将时间戳转换成可识别的格式
       7:      time_t local_tv_sec=header->ts.tv_sec;   
       8:      tm *ltime=localtime(&local_tv_sec);
       9:      //strftime(timestr,sizeof(timestr),"%H:%M:%S",ltime);
      10:      strftime( timestr, sizeof timestr, "%H:%M:%S", ltime);
      11:      printf("%s,%.6d len:%d
    ",timestr,header->ts.tv_usec,header->len);
      12:  }
      13:  int main(){
      14:      pcap_if_t *alldevs;
      15:      pcap_t *adhandle;
      16:      char errbuf[PCAP_ERRBUF_SIZE];
      17:   
      18:      if(pcap_findalldevs_ex(PCAP_SRC_IF_STRING,NULL,&alldevs,errbuf)==-1){
      19:          fprintf(stderr,"Error in pcap_findalldevs: %s
    ",errbuf);
      20:          exit(1);
      21:      }
      22:   
      23:      //print device list
      24:      int count=1;
      25:      for(pcap_if_t *d=alldevs;d!=NULL;d=d->next){
      26:          printf("%d. %s",count++,d->name);
      27:          printf("(%s)
    ",d->description);
      28:      }
      29:      if(count==1) {
      30:          printf("No interface found! Make sure WinPcap is isntalled
    ");
      31:          return -1;
      32:      }
      33:      int num;
      34:      printf("Enter the interface number:(1-%d): ",count);
      35:      scanf("%d",&num);
      36:      if(num<1||num>count){
      37:          printf("Out Of Range
    ");
      38:          pcap_freealldevs(alldevs);
      39:          return -1;
      40:      }
      41:      pcap_if_t *d=alldevs;
      42:       // 跳转到选中的适配器 
      43:      for(int i=0;i<num;i++,d=d->next){
      44:          // 设备名
      45:          // 65535保证能捕获到不同数据链路层上的每个数据包的全部内容
      46:          // 混杂模式
      47:          // 读取超时时间
      48:          // 远程机器验证
      49:          // 错误缓冲池
      50:          adhandle=pcap_open(d->name,65536,PCAP_OPENFLAG_PROMISCUOUS,1000,NULL,errbuf);
      51:          if(adhandle==NULL){
      52:              fprintf(stderr,"Unable to open the adapter %s",d->name);
      53:              return -1;
      54:          }
      55:          printf("Listening on %s...
    ",d->description);
      56:          
      57:          pcap_freealldevs(alldevs);
      58:          //开始捕获 
      59:          pcap_loop(adhandle,0,packet_handler,NULL);
      60:   
      61:      }
      62:  }

    试验结果:

    image

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  • 原文地址:https://www.cnblogs.com/ZJUT-jiangnan/p/3713099.html
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