新建 文本文档 (2).txt

能够按个人意图任意发送ARP数据包的C源代码

CODE:/* 

This program sends out one ARP packet with source/target IP 

and Ethernet hardware addresses suuplied by the user. It 

compiles and works on Linux and will probably work on any 

Unix that has SOCK_PACKET. [email][e-mail][/email] 

*/ 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#define ETH_HW_ADDR_LEN 6 

#define IP_ADDR_LEN 4 

#define ARP_FRAME_TYPE 0x0806 

#define ETHER_HW_TYPE 1 

#define IP_PROTO_TYPE 0x0800 

#define OP_ARP_REQUEST 2 

#define OP_ARP_QUEST 1 

#define DEFAULT_DEVICE "eth0" 

char usage[] = {"send_arp: sends out custom ARP packet. yuri volobuev 

usage: send_arp src_ip_addr src_hw_addr targ_ip_addr tar_hw_addr number"}; 

struct arp_packet 

{ 

u_char targ_hw_addr[ETH_HW_ADDR_LEN]; 

u_char src_hw_addr[ETH_HW_ADDR_LEN]; 

u_short frame_type; 

u_short hw_type; 

u_short prot_type; 

u_char hw_addr_size; 

u_char prot_addr_size; 

u_short op; 

u_char sndr_hw_addr[ETH_HW_ADDR_LEN]; 

u_char sndr_ip_addr[IP_ADDR_LEN]; 

u_char rcpt_hw_addr[ETH_HW_ADDR_LEN]; 

u_char rcpt_ip_addr[IP_ADDR_LEN]; 

u_char padding[18]; 

}; 

void die (char *); 

void get_ip_addr (struct in_addr *, char *); 

void get_hw_addr (char *, char *); 

int main (int argc, char * argv[]) 

{ 

struct in_addr src_in_addr, targ_in_addr; 

struct arp_packet pkt; 

struct sockaddr sa; 

int sock; 

int j,number; 

if (argc != 6) 

die(usage); 

sock = socket(AF_INET, SOCK_PACKET, htons(ETH_P_RARP)); 

if (sock < 0) 

{ 

perror("socket"); 

exit(1); 

} 

number=atoi(argv[5]); 

pkt.frame_type = htons(ARP_FRAME_TYPE); 

pkt.hw_type = htons(ETHER_HW_TYPE); 

pkt.prot_type = htons(IP_PROTO_TYPE); 

pkt.hw_addr_size = ETH_HW_ADDR_LEN; 

pkt.prot_addr_size = IP_ADDR_LEN; 

pkt.op = htons(OP_ARP_QUEST); 

get_hw_addr(pkt.targ_hw_addr, argv[4]); 

get_hw_addr(pkt.rcpt_hw_addr, argv[4]); 

get_hw_addr(pkt.src_hw_addr, argv[2]); 

get_hw_addr(pkt.sndr_hw_addr, argv[2]); 

get_ip_addr(&src_in_addr, argv[1]); 

get_ip_addr(&targ_in_addr, argv[3]); 

memcpy(pkt.sndr_ip_addr, &src_in_addr, IP_ADDR_LEN); 

memcpy(pkt.rcpt_ip_addr, &targ_in_addr, IP_ADDR_LEN); 

bzero(pkt.padding,18); 

strcpy(sa.sa_data,DEFAULT_DEVICE); 

for (j=0;j { 

if (sendto(sock,&pkt,sizeof(pkt),0,&sa,sizeof(sa)) < 0) 

{ 

perror("sendto"); 

exit(1); 

} 

} 

exit(0); 

} 

void die (char *str) 

{ 

fprintf(stderr,"%s\n",str); 

exit(1); 

} 

void get_ip_addr (struct in_addr *in_addr, char *str) 

{ 

struct hostent *hostp; 

in_addr->s_addr = inet_addr(str); 

if(in_addr->s_addr == -1) 

{ 

if ((hostp = gethostbyname(str))) 

bcopy(hostp->h_addr, in_addr, hostp->h_length); 

else { 

fprintf(stderr, "send_arp: unknown host %s\n", str); 

exit(1); 

} 

} 

} 

void get_hw_addr (char *buf, char *str) 

{ 

int i; 

char c, val; 

for(i = 0; i < ETH_HW_ADDR_LEN; i++) 

{ 

if (!(c = tolower(*str++))) 

die("Invalid hardware address"); 

if (isdigit(c)) 

val = c - '0'; 

else if (c >= 'a' && c <= 'f') 

val = c-'a'+10; 

else 

die("Invalid hardware address"); 

*buf = val << 4; 

if (!(c = tolower(*str++))) 

die("Invalid hardware address"); 

if (isdigit(c)) 

val = c - '0'; 

else if (c >= 'a' && c <= 'f') 

val = c-'a'+10; 

else 

die("Invalid hardware address"); 

*buf++ |= val; 

if (*str == ':') 

str++; 

} 

}