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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="8.htm">上一层</a>][<a href="165.htm">下一篇</a>]
<hr><p align="left"><small>发信人: scz (小四), 信区: UNP <br>
标 题: 伪造数据包arnudp.c <br>
发信站: UNIX编程 (2001年10月06日18:58:02 星期六), 站内信件 <br>
<br>
发信人: Happy (欢乐幸福人) <br>
信 区: Hacker <br>
发信站: 华南网木棉站 <br>
<br>
/************************************************************************/ <br>
/* arnudp.c version 0.01 by Arny - cs6171@scitsc.wlv.ac.uk */ <br>
/* Sends a single udp datagram with the source/destination address/port */ <br>
/* set to whatever you want. Unfortunately Linux 1.2 and SunOS 4.1 */ <br>
/* don't seem to have the IP_HDRINCL option, so the source address will */ <br>
/* be set to the real address. It does however work ok on SunOS 5.4. */ <br>
/* Should compile fine with just an ANSI compiler (such as gcc) under */ <br>
/* Linux and SunOS 4.1, but with SunOS 5.4 you have to specify extra */ <br>
/* libraries on the command line: */ <br>
/* /usr/ucb/cc -o arnudp arnudp001.c -lsocket -lnsl */ <br>
/* I'll state the obvious - this needs to be run as root! Do not use */ <br>
/* this program unless you know what you are doing, as it is possible */ <br>
/* that you could confuse parts of your network / internet. */ <br>
/* (c) 1995 Arny - I accept no responsiblity for anything this does. */ <br>
/************************************************************************/ <br>
/* I used the source of traceroute as an example while writing this. */ <br>
/* Many thanks to Dan Egnor (egnor@ugcs.caltech.edu) and Rich Stevens */ <br>
/* for pointing me in the right direction. */ <br>
/************************************************************************/ <br>
<br>
#include<sys/types.h> <br>
#include<sys/socket.h> <br>
#include<netinet/in_systm.h> <br>
#include<netinet/in.h> <br>
#include<netinet/ip.h> <br>
#include<netinet/udp.h> <br>
#include<errno.h> <br>
#include<string.h> <br>
#include<netdb.h> <br>
#include<arpa/inet.h> <br>
#include<stdio.h> <br>
<br>
struct sockaddr sa; <br>
<br>
main(int argc,char **argv) <br>
{ <br>
int fd; <br>
int fd; <br>
int x=1; <br>
struct sockaddr_in *p; <br>
struct hostent *he; <br>
u_char gram[38]= <br>
{ <br>
0x45, 0x00, 0x00, 0x26, <br>
0x12, 0x34, 0x00, 0x00, <br>
0xFF, 0x11, 0, 0, <br>
0, 0, 0, 0, <br>
0, 0, 0, 0, <br>
<br>
0, 0, 0, 0, <br>
0x00, 0x12, 0x00, 0x00, <br>
<br>
'1','2','3','4','5','6','7','8','9','0' <br>
}; <br>
<br>
if(argc!=5) <br>
{ <br>
fprintf(stderr,"usage: %s sourcename sourceport destinationname destinat <br>
ionport\n",*argv); <br>
exit(1); <br>
}; <br>
<br>
if((he=gethostbyname(argv[1]))==NULL) <br>
{ <br>
fprintf(stderr,"can't resolve source hostname\n"); <br>
exit(1); <br>
}; <br>
bcopy(*(he->h_addr_list),(gram+12),4); <br>
<br>
if((he=gethostbyname(argv[3]))==NULL) <br>
{ <br>
fprintf(stderr,"can't resolve destination hostname\n"); <br>
exit(1); <br>
}; <br>
bcopy(*(he->h_addr_list),(gram+16),4); <br>
<br>
*(u_short*)(gram+20)=htons((u_short)atoi(argv[2])); <br>
*(u_short*)(gram+22)=htons((u_short)atoi(argv[4])); <br>
<br>
p=(struct sockaddr_in*)&sa; <br>
p->sin_family=AF_INET; <br>
bcopy(*(he->h_addr_list),&(p->sin_addr),sizeof(struct in_addr)); <br>
<br>
if((fd=socket(AF_INET,SOCK_RAW,IPPROTO_RAW))== -1) <br>
{ <br>
perror("socket"); <br>
exit(1); <br>
}; <br>
<br>
#ifdef IP_HDRINCL <br>
fprintf(stderr,"we have IP_HDRINCL :-)\n\n"); <br>
if (setsockopt(fd,IPPROTO_IP,IP_HDRINCL,(char*)&x,sizeof(x))<0) <br>
{ <br>
perror("setsockopt IP_HDRINCL"); <br>
exit(1); <br>
}; <br>
#else <br>
fprintf(stderr,"we don't have IP_HDRINCL :-(\n\n"); <br>
#endif <br>
<br>
if((sendto(fd,&gram,sizeof(gram),0,(struct sockaddr*)p,sizeof(struct sockaddr))) <br>
== -1) <br>
{ <br>
perror("sendto"); <br>
exit(1); <br>
}; <br>
<br>
printf("datagram sent without error:"); <br>
for(x=0;x<(sizeof(gram)/sizeof(u_char));x++) <br>
{ <br>
if(!(x%4)) putchar('\n'); <br>
printf("%02x",gram[x]); <br>
}; <br>
putchar('\n'); <br>
<br>
} <br>
-- <br>
<br>
也许有一天，他再从海上蓬蓬的雨点中升起， <br>
飞向西来，再形成一道江流，再冲倒两旁的石壁， <br>
再来寻夹岸的桃花。然而，我不敢说来生，也不敢信来生...... <br>
※ 来源:·UNIX编程 www.tiaozhan.com/unixbbs/·[FROM: 211.167.65.123] <br>
</small><hr>
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