📄 452.htm
字号:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>CTerm非常精华下载</title>
</head>
<body bgcolor="#FFFFFF">
<table border="0" width="100%" cellspacing="0" cellpadding="0" height="577">
<tr><td width="32%" rowspan="3" height="123"><img src="DDl_back.jpg" width="300" height="129" alt="DDl_back.jpg"></td><td width="30%" background="DDl_back2.jpg" height="35"><p align="center"><a href="http://apue.dhs.org"><font face="黑体"><big><big>apue</big></big></font></a></td></tr>
<tr>
<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>
<tr>
<td width="68%" height="44" bgcolor="#000000"><font face="黑体"><big><big><p align="center"></big></big><a href="http://cterm.163.net"><img src="banner.gif" width="400" height="60" alt="banner.gif"border="0"></a></font></td>
</tr>
<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="320.htm">上一层</a>][<a href="453.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: 就是前面 skyfly给的原代码 <br>
发信站: 武汉白云黄鹤站 (Thu Dec 30 16:05:13 1999), 站内信件 <br>
/* <br>
gcc -lbsd -O3 -o linuxanti linuxanti.c <br>
*/ <br>
/* <br>
Network Promiscuous Ethernet Detector. <br>
Linux 2.0.x / 2.1.x, libc5 & GlibC <br>
----------------------------------------- <br>
(c) 1998 savage@apostols.org <br>
----------------------------------------- <br>
Scan your subnet, and detect promiscuous <br>
Windows & linuxes. It really works, not a joke. <br>
----------------------------------------- <br>
$Id: neped.c,v 1.4 1998/07/20 22:31:52 savage Exp $ <br>
*/ <br>
#include <stdio.h> <br>
#include <fcntl.h> /* for nonblocking */ <br>
#include <sys/ioctl.h> <br>
#include <sys/socket.h> /* basic socket definitions */ <br>
#include <net/if.h> /* for ifreq */ <br>
#include <arpa/inet.h> /* inet(3) functions */ <br>
#define ETH_P_ARP 0x0806 <br>
#define MAX_PACK_LEN 2000 <br>
#define ETHER_HEADER_LEN 14 <br>
#define ARPREQUEST 1 <br>
#define ARPREPLY 2 <br>
#define perr( s ) fprintf( stderr, s ) <br>
struct arp_struct <br>
{ <br>
u_char dst_mac[6]; <br>
u_char src_mac[6]; <br>
u_short pkt_type; <br>
u_short hw_type; <br>
u_short pro_type; <br>
u_char hw_len; <br>
u_char pro_len; <br>
u_short arp_op; <br>
u_char sender_eth[6]; <br>
u_char sender_ip[4]; <br>
u_char target_eth[6]; <br>
u_char target_ip[4]; <br>
}; <br>
union <br>
union <br>
{ <br>
u_char full_packet[MAX_PACK_LEN]; <br>
struct arp_struct arp_pkt; <br>
} a; <br>
#define full_packet a.full_packet <br>
#define arp_pkt a.arp_pkt <br>
char * inetaddr ( u_int32_t ip ) <br>
{ <br>
struct in_addr in; <br>
in.s_addr = ip; <br>
return inet_ntoa(in); <br>
} <br>
char * hwaddr ( u_char *s ) <br>
{ <br>
static char buf[30]; <br>
sprintf( buf, "%02X:%02X:%02X:%02X:%02X:%02X", s[0], s[1], s[2], s[3], s <br>
[4], <br>
s[5] ); <br>
return buf; <br>
} <br>
int main ( int argc, char **argv ) <br>
{ <br>
{ <br>
int rec; <br>
int len, from_len, rsflags; <br>
struct ifreq if_data; <br>
struct sockaddr from; <br>
u_int8_t myMAC[6]; <br>
u_int32_t myIP, myNETMASK, myBROADCAST, ip, dip, sip; <br>
if (getuid () != 0) <br>
{ <br>
perr( "You must be root to run this program!\n" ); <br>
exit( 1 ); <br>
} <br>
if ( argc != 2 ) <br>
{ <br>
fprintf( stderr, "Usage: %s eth0\n", argv[0] ); <br>
exit( 0 ); <br>
} <br>
if ( (rec = socket (AF_INET, SOCK_PACKET, htons(ETH_P_ARP))) < 0 ) <br>
{ <br>
perror( "socket error" ); <br>
exit( 1 ); <br>
} <br>
printf( "----------------------------------------------------------\n" ) <br>
; <br>
strcpy( if_data.ifr_name, argv[1] ); <br>
if ( ioctl(rec, SIOCGIFHWADDR, &if_data) < 0 ) <br>
{ <br>
perr( "can't get HW addres of my interface!\n" ); <br>
exit( 1 ); <br>
} <br>
memcpy( myMAC, if_data.ifr_hwaddr.sa_data, 6 ); <br>
printf( "> My HW Addr: %s\n", hwaddr(myMAC) ); <br>
if ( ioctl(rec, SIOCGIFADDR, &if_data) < 0 ) <br>
{ <br>
perr( "can't get IP addres of my interface!\n" ); <br>
exit( 1 ); <br>
} <br>
memcpy( (void *) &ip, (void *) &if_data.ifr_addr.sa_data + 2, 4 ); <br>
myIP = ntohl( ip ); <br>
printf( "> My IP Addr: %s\n", inetaddr(ip) ); <br>
if ( ioctl(rec, SIOCGIFNETMASK, &if_data) < 0 ) <br>
{ <br>
perr( "can't get NETMASK addres of my interface!\n" ); <br>
} <br>
memcpy( (void *)&ip, (void *)&if_data.ifr_netmask.sa_data + 2, 4 ); <br>
myNETMASK = ntohl(ip); <br>
printf( "> My NETMASK: %s\n", inetaddr(ip) ); <br>
if ( ioctl(rec, SIOCGIFBRDADDR, &if_data) < 0 ) <br>
{ <br>
perr( "can't get BROADCAST addres of my interface!\n" ); <br>
} <br>
memcpy( (void *)&ip, (void *)&if_data.ifr_broadaddr.sa_data + 2, 4 ); <br>
myBROADCAST = ntohl( ip ); <br>
printf( "> My BROADCAST: %s\n", inetaddr(ip) ); <br>
if ( (rsflags = fcntl(rec, F_GETFL)) == -1 ) <br>
{ <br>
perror( "fcntl F_GETFL" ); <br>
exit(1); <br>
} <br>
if ( fcntl(rec, F_SETFL, rsflags | O_NONBLOCK) == -1 ) <br>
{ <br>
perror( "fcntl F_SETFL" ); <br>
exit(1); <br>
} <br>
printf( "----------------------------------------------------------\n" ) <br>
; <br>
printf( "> Scanning ....\n" ); <br>
for ( dip = (myIP & myNETMASK) + 1; dip < myBROADCAST; dip++ ) <br>
{ <br>
bzero( full_packet, MAX_PACK_LEN ); <br>
memcpy( arp_pkt.dst_mac, "\xff\0\0\0\0\0", 6 ); /* ff:00:00:00:00:0 <br>
0 */ <br>
memcpy( arp_pkt.src_mac, myMAC, 6 ); <br>
arp_pkt.pkt_type = htons( ETH_P_ARP ); <br>
arp_pkt.hw_type = htons( 0x0001 ); <br>
arp_pkt.hw_len = 6; <br>
arp_pkt.pro_type = htons( 0x0800 ); <br>
arp_pkt.pro_len = 4; <br>
arp_pkt.arp_op = htons( ARPREQUEST ); <br>
memcpy( arp_pkt.sender_eth, myMAC, 6 ); <br>
ip = htonl( myIP ); <br>
memcpy( arp_pkt.sender_ip, &ip, 4 ); <br>
memcpy( arp_pkt.target_eth, "\0\0\0\0\0\0", 6 ); <br>
ip = htonl( dip ); <br>
memcpy( arp_pkt.target_ip, &ip, 4 ); <br>
strcpy( from.sa_data, argv[1] ); <br>
from.sa_family = 1; <br>
if( sendto(rec, full_packet, sizeof (struct arp_struct), 0, &from, s <br>
izeo <br>
izeo <br>
f(from)) < 0 ) <br>
{ <br>
perror( "sendto error" ); <br>
} <br>
usleep( 50 ); <br>
len = recvfrom( rec, full_packet, MAX_PACK_LEN, 0, &from, &from_len <br>
); <br>
if ( len <= ETHER_HEADER_LEN ) <br>
{ <br>
continue; <br>
} <br>
memcpy( &ip, arp_pkt.target_ip, 4 ); <br>
memcpy( &sip, arp_pkt.sender_ip, 4 ); <br>
if ( ntohs(arp_pkt.arp_op) == ARPREPLY <br>
&& ntohl (ip) == myIP <br>
&& (dip - ntohl(sip) >= 0) <br>
&& (dip - ntohl(sip) <= 2) ) <br>
{ <br>
printf( "*> Host %s, %s **** Promiscuous mode detected !!!\n", i <br>
neta <br>
ddr(sip), hwaddr(arp_pkt.sender_eth) ); <br>
} <br>
} /* end of for */ <br>
printf( "> End.\n" ); <br>
exit( 0 ); <br>
} /* end of main */ <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>
<p align="center">[<a href="index.htm">回到开始</a>][<a href="320.htm">上一层</a>][<a href="453.htm">下一篇</a>]
<p align="center"><a href="http://cterm.163.net">欢迎访问Cterm主页</a></p>
</table>
</body>
</html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -