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<hr><p align="left"><small>:发信人: Wujian (浴火凤凰), 信区: Security <br>
:标 题: get-mac.c <br>
:发信站: 武汉白云黄鹤站 (Thu Jul 13 17:29:19 2000), 站内信件 <br>
<br>
这个是用libnet的 <br>
<br>
/* <br>
<br>
* $Id: get_mac.c,v 1.3 1999/10/27 18:39:10 route Exp $ <br>
<br>
* <br>
<br>
* libnet <br>
<br>
* get_mac.c - get the MAC address of a remote host <br>
<br>
* <br>
<br>
* Copyright (c) 1998, 1999, 2000 Mike D. Schiffman <mike@infonexus.com> <br>
<br>
* All rights reserved. <br>
<br>
* <br>
* <br>
<br>
* Redistribution and use in source and binary forms, with or without <br>
<br>
* modification, are permitted provided that the following conditions <br>
<br>
* are met: <br>
<br>
* 1. Redistributions of source code must retain the above copyright <br>
<br>
* notice, this list of conditions and the following disclaimer. <br>
<br>
* 2. Redistributions in binary form must reproduce the above copyright <br>
<br>
* notice, this list of conditions and the following disclaimer in the <br>
<br>
* documentation and/or other materials provided with the distribution. <br>
<br>
* <br>
<br>
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND <br>
<br>
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE <br>
<br>
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE <br>
<br>
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE <br>
<br>
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL <br>
<br>
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS <br>
<br>
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) <br>
<br>
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT <br>
<br>
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY <br>
<br>
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF <br>
<br>
* SUCH DAMAGE. <br>
<br>
* <br>
<br>
*/ <br>
*/ <br>
<br>
<br>
<br>
#if (HAVE_CONFIG_H) <br>
<br>
#include "../../include/config.h" <br>
<br>
#endif <br>
<br>
#include <libnet.h> <br>
<br>
//#include <pcap.h> <br>
<br>
<br>
<br>
#define IP_UCHAR_COMP(x, y) \ <br>
<br>
(x[0] == y[0] && x[1] == y[1] && x[2] == y[2] && x[3] == y[3]) <br>
<br>
<br>
<br>
<br>
<br>
<br>
u_char enet_dst[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; <br>
<br>
<br>
<br>
int libnet_do_arp(struct libnet_link_int *, u_char *, struct ether_addr *, <br>
<br>
u_long); <br>
<br>
<br>
<br>
int <br>
<br>
main(int argc, char *argv[]) <br>
<br>
{ <br>
<br>
int i, c; <br>
<br>
char errbuf[256]; <br>
<br>
char *device = NULL; <br>
<br>
struct libnet_link_int *l; <br>
<br>
struct ether_addr e; <br>
<br>
u_long ip; <br>
<br>
<br>
<br>
while ((c = getopt(argc, argv, "i:")) != EOF) <br>
<br>
{ <br>
<br>
switch (c) <br>
<br>
{ <br>
<br>
case 'i': <br>
<br>
device = optarg; <br>
<br>
break; <br>
<br>
default: <br>
<br>
exit(EXIT_FAILURE); <br>
<br>
} <br>
<br>
} <br>
<br>
<br>
<br>
if (!device) <br>
<br>
{ <br>
<br>
fprintf(stderr, "Specify a device\n"); <br>
<br>
exit(EXIT_FAILURE); <br>
<br>
} <br>
<br>
if (argc > optind) <br>
<br>
{ <br>
<br>
if ((ip = libnet_name_resolve(argv[optind], 1)) == -1) <br>
<br>
{ <br>
<br>
fprintf(stderr, "Cannot resolve IP address\n"); <br>
<br>
exit(EXIT_FAILURE); <br>
<br>
} <br>
<br>
} <br>
<br>
else <br>
<br>
{ <br>
<br>
fprintf(stderr, "IP address to ARP for?\n"); <br>
<br>
exit(EXIT_FAILURE); <br>
<br>
} <br>
<br>
<br>
<br>
l = libnet_open_link_interface(device, errbuf); <br>
<br>
if (!l) <br>
<br>
{ <br>
<br>
fprintf(stderr, "libnet_open_link_interface: %s\n", errbuf); <br>
<br>
exit(EXIT_FAILURE); <br>
<br>
} <br>
<br>
<br>
<br>
c = libnet_do_arp(l, device, &e, ip); <br>
<br>
if (c != -1) <br>
<br>
{ <br>
<br>
for (i = 0; i < 6; i++) <br>
<br>
{ <br>
<br>
printf("%x", e.ether_addr_octet[i]); <br>
<br>
if (i != 5) <br>
<br>
{ <br>
<br>
printf(":"); <br>
<br>
} <br>
<br>
} <br>
<br>
printf("\n"); <br>
<br>
} <br>
} <br>
<br>
return (c == -1 ? EXIT_FAILURE : EXIT_SUCCESS); <br>
<br>
} <br>
<br>
<br>
<br>
<br>
<br>
int <br>
<br>
libnet_do_arp(struct libnet_link_int *l, u_char *device, struct ether_addr *e, <br>
<br>
u_long ip) <br>
<br>
{ <br>
<br>
int n, i; <br>
<br>
u_char *buf, errbuf[256], *packet, *ip_p; <br>
<br>
struct libnet_ethernet_hdr *p; <br>
<br>
struct libnet_arp_hdr *a; <br>
<br>
u_long local_ip; <br>
<br>
pcap_t *pd; <br>
<br>
struct pcap_pkthdr pc_hdr; <br>
<br>
<br>
<br>
/* <br>
<br>
* Initialize a packet. <br>
<br>
*/ <br>
<br>
if (libnet_init_packet(LIBNET_ARP_H + LIBNET_ETH_H, &buf) == -1) <br>
<br>
{ <br>
<br>
perror("libnet_init_packet memory:"); <br>
<br>
exit(EXIT_FAILURE); <br>
<br>
} <br>
<br>
<br>
<br>
/* <br>
<br>
* Get the ethernet address of the device. <br>
<br>
*/ <br>
<br>
e = libnet_get_hwaddr(l, device, errbuf); <br>
<br>
if (e == NULL) <br>
<br>
{ <br>
<br>
fprintf(stderr, "libnet_get_hwaddr: %s\n", errbuf); <br>
<br>
return (-1); <br>
<br>
} <br>
<br>
<br>
<br>
/* <br>
<br>
* Get the IP address of the device. <br>
<br>
*/ <br>
<br>
local_ip = htonl(libnet_get_ipaddr(l, device, errbuf)); <br>
<br>
if (!local_ip) <br>
<br>
{ <br>
<br>
fprintf(stderr, "libnet_get_ipaddr: %s\n", errbuf); <br>
<br>
return (-1); <br>
<br>
} <br>
} <br>
<br>
<br>
<br>
/* <br>
<br>
* Open the pcap device. <br>
<br>
*/ <br>
<br>
pd = pcap_open_live(device, LIBNET_ARP_H + LIBNET_ETH_H, 1, 500, errbuf); <br>
<br>
if (pd == NULL) <br>
<br>
{ <br>
<br>
fprintf(stderr, "pcap_open_live: %s\n", errbuf); <br>
<br>
return (-1); <br>
<br>
} <br>
<br>
<br>
<br>
<br>
/* <br>
<br>
* Ethernet header <br>
<br>
*/ <br>
<br>
libnet_build_ethernet( <br>
<br>
enet_dst, /* broadcast ethernet address */ <br>
<br>
e->ether_addr_octet, /* source ethernet address */ <br>
<br>
ETHERTYPE_ARP, /* this frame holds an ARP packet */ <br>
<br>
NULL, /* payload */ <br>
0, /* payload size */ <br>
buf); /* packet header memory */ <br>
<br>
/* <br>
* ARP header <br>
*/ <br>
libnet_build_arp( <br>
ARPHRD_ETHER, /* hardware address type */ <br>
ETHERTYPE_IP, /* protocol address type */ <br>
ETHER_ADDR_LEN, /* hardware address length */ <br>
4, /* protocol address length */ <br>
ARPOP_REQUEST, /* packet type - ARP request */ <br>
e->ether_addr_octet, /* source (local) ethernet address */ <br>
(u_char *)&local_ip, /* source (local) IP address */ <br>
enet_dst, <br>
<br>
-- <br>
※ 来源:．武汉白云黄鹤站 bbs.whnet.edu.cn．[FROM: 202.97.167.66] <br>
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