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मैं प्राप्त करते हैं और लिनक्स (Ubuntu) में सी प्रोग्रामिंग का उपयोग कर एआरपी पैकेट भेजने
मेरे कार्यक्रम ठीक काम करता है (यानी किसी भी त्रुटि के बिना चलाता है) करने के लिए कोशिश कर रहा हूँ का उपयोग कर उत्तर देते हैं, लेकिन मुझे लगता है पैकेट का पता लगाने नहीं कर सकते Wireshark का उपयोग कर।एआरपी अनुरोध और ग सॉकेट प्रोग्रामिंग
स्रोत कोड:
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <asm/types.h>
#include <math.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <linux/if_packet.h>
#include <linux/if_ether.h>
#include <linux/if_arp.h>
#define BUF_SIZE 42
#define DEVICE "eth0"
#define ETH_P_NULL 0x0
#define ETH_MAC_LEN ETH_ALEN
#define ETH_ARP 0x0806
int s = 0; /*Socketdescriptor*/
void* buffer = NULL;
long total_packets = 0;
long answered_packets = 0;
void sigint(int signum);
struct __attribute__((packed)) arp_header
{
unsigned short arp_hd;
unsigned short arp_pr;
unsigned char arp_hdl;
unsigned char arp_prl;
unsigned short arp_op;
unsigned char arp_sha[6];
unsigned char arp_spa[4];
unsigned char arp_dha[6];
unsigned char arp_dpa[4];
};
int main(void) {
buffer = (void*)malloc(BUF_SIZE); /*Buffer for Ethernet Frame*/
unsigned char* etherhead = buffer; /*Pointer to Ethenet Header*/
struct ethhdr *eh = (struct ethhdr *)etherhead; /*Another pointer to
ethernet header*/
unsigned char* arphead = buffer + 14;
struct arp_header *ah;
unsigned char src_mac[6]; /*our MAC address*/
struct ifreq ifr;
struct sockaddr_ll socket_address;
int ifindex = 0; /*Ethernet Interface index*/
int i;
int length; /*length of received packet*/
int sent;
printf("Server started, entering initialiation phase...\n");
/*open socket*/
s = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (s == -1) {
perror("socket():");
exit(1);
}
printf("Successfully opened socket: %i\n", s);
/*retrieve ethernet interface index*/
strncpy(ifr.ifr_name, DEVICE, IFNAMSIZ);
if (ioctl(s, SIOCGIFINDEX, &ifr) == -1) {
perror("SIOCGIFINDEX");
exit(1);
}
ifindex = ifr.ifr_ifindex;
printf("Successfully got interface index: %i\n", ifindex);
/*retrieve corresponding MAC*/
if (ioctl(s, SIOCGIFHWADDR, &ifr) == -1) {
perror("SIOCGIFINDEX");
exit(1);
}
for (i = 0; i < 6; i++) {
src_mac[i] = ifr.ifr_hwaddr.sa_data[i];
}
printf("Successfully got our MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n",
src_mac[0],src_mac[1],src_mac[2],src_mac[3],src_mac[4],src_mac[5]);
/*prepare sockaddr_ll*/
socket_address.sll_family = PF_PACKET;
socket_address.sll_protocol = htons(ETH_P_IP);
socket_address.sll_ifindex = ifindex;
socket_address.sll_hatype = ARPHRD_ETHER;
socket_address.sll_pkttype = PACKET_OTHERHOST;
socket_address.sll_halen = 0;
socket_address.sll_addr[6] = 0x00;
socket_address.sll_addr[7] = 0x00;
/*establish signal handler*/
signal(SIGINT, sigint);
printf("Successfully established signal handler for SIGINT\n");
printf("We are in production state, waiting for incoming packets....\n");
while (1) {
/*Wait for incoming packet...*/
length = recvfrom(s, buffer, BUF_SIZE, 0, NULL, NULL);
if (length == -1)
{
perror("recvfrom():");
exit(1);
}
if(htons(eh->h_proto) == 0x806)
{
unsigned char buf_arp_dha[6];
unsigned char buf_arp_dpa[4];
ah = (struct arp_header *)arphead;
if(htons(ah->arp_op) != 0x0001)
continue;
printf("buffer is---------------- %s \n",(char*)ah);
printf("H/D TYPE : %x PROTO TYPE : %x \n",ah->arp_hd,ah->arp_pr);
printf("H/D leng : %x PROTO leng : %x \n",ah->arp_hdl,ah->arp_prl);
printf("OPERATION : %x \n", ah->arp_op);
printf("SENDER MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n",
ah->arp_sha[0],
ah->arp_sha[1],
ah->arp_sha[2],
ah->arp_sha[3],
ah->arp_sha[4],
ah->arp_sha[5]
);
printf("SENDER IP address: %02d:%02d:%02d:%02d\n",
ah->arp_spa[0],
ah->arp_spa[1],
ah->arp_spa[2],
ah->arp_spa[3]
);
if(ah->arp_spa[0]==10&&ah->arp_spa[1]==00&&ah->arp_spa[2]==00&&ah->arp_spa[3]==01)
{
printf("Sender ip is .............bam bam..........................................\n");
system("sudo arp -s 10.0.0.1 00:1e:73:91:04:0d");
}
printf("TARGET MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n",
ah->arp_dha[0],
ah->arp_dha[1],
ah->arp_dha[2],
ah->arp_dha[3],
ah->arp_dha[4],
ah->arp_dha[5]
);
printf("TARGET IP address: %02d:%02d:%02d:%02d\n",
ah->arp_dpa[0],
ah->arp_dpa[1],
ah->arp_dpa[2],
ah->arp_dpa[3]
);
printf("+++++++++++++++++++++++++++++++++++++++\n");
printf("ETHER DST MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n",
eh->h_dest[0],
eh->h_dest[1],
eh->h_dest[2],
eh->h_dest[3],
eh->h_dest[4],
eh->h_dest[5]
);
printf("ETHER SRC MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n",
eh->h_source[0],
eh->h_source[1],
eh->h_source[2],
eh->h_source[3],
eh->h_source[4],
eh->h_source[5]
);
memcpy((void*)etherhead, (const void*)(etherhead+ETH_MAC_LEN),
ETH_MAC_LEN);
memcpy((void*)(etherhead+ETH_MAC_LEN), (const void*)src_mac,
ETH_MAC_LEN);
eh->h_proto = ETH_ARP;
printf("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& \n");
printf("ETHER DST MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n",
eh->h_dest[0],
eh->h_dest[1],
eh->h_dest[2],
eh->h_dest[3],
eh->h_dest[4],
eh->h_dest[5]
);
printf("ETHER SRC MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n",
eh->h_source[0],
eh->h_source[1],
eh->h_source[2],
eh->h_source[3],
eh->h_source[4],
eh->h_source[5]
);
ah->arp_hd = ntohs(ah->arp_hd);
ah->arp_pr = ntohs(ah->arp_pr);
ah->arp_op = 0x0002;
buf_arp_dpa[0] = ah->arp_dpa[0];
buf_arp_dpa[1] = ah->arp_dpa[1];
buf_arp_dpa[2] = ah->arp_dpa[2];
buf_arp_dpa[3] = ah->arp_dpa[3];
ah->arp_dha[0] = ah->arp_sha[0];
ah->arp_dha[1] = ah->arp_sha[1];
ah->arp_dha[2] = ah->arp_sha[2];
ah->arp_dha[3] = ah->arp_sha[3];
ah->arp_dha[4] = ah->arp_sha[4];
ah->arp_dha[5] = ah->arp_sha[5];
ah->arp_dpa[0] = ah->arp_spa[0];
ah->arp_dpa[1] = ah->arp_spa[1];
ah->arp_dpa[2] = ah->arp_spa[2];
ah->arp_dpa[3] = ah->arp_spa[3];
ah->arp_spa[0] = buf_arp_dpa[0];
ah->arp_spa[1] = buf_arp_dpa[1];
ah->arp_spa[2] = buf_arp_dpa[2];
ah->arp_spa[3] = buf_arp_dpa[3];
//change the sender mac address
ah->arp_sha[0] = 0x00;
ah->arp_sha[1] = 0x1e;
ah->arp_sha[2] = 0x73;
ah->arp_sha[3] = 0x78;
ah->arp_sha[4] = 0x9a;
ah->arp_sha[5] = 0x0d;
socket_address.sll_addr[0] = eh->h_dest[0];
socket_address.sll_addr[1] = eh->h_dest[1];
socket_address.sll_addr[2] = eh->h_dest[2];
socket_address.sll_addr[3] = eh->h_dest[3];
socket_address.sll_addr[4] = eh->h_dest[4];
socket_address.sll_addr[5] = eh->h_dest[5];
printf("=======================================\n");
printf("SENDER MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n",
ah->arp_sha[0],
ah->arp_sha[1],
ah->arp_sha[2],
ah->arp_sha[3],
ah->arp_sha[4],
ah->arp_sha[5]
);
printf("SENDER IP address: %02d:%02d:%02d:%02d\n",
ah->arp_spa[0],
ah->arp_spa[1],
ah->arp_spa[2],
ah->arp_spa[3]
);
if((ah->arp_spa[0]==10 && ah->arp_spa[1]==0 && ah->arp_spa[2]==0 && ah->arp_spa[3]==1))
printf("------------------------------------------10.0.0.1-----------------------------------------\n");
printf("TARGET MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n",
ah->arp_dha[0],
ah->arp_dha[1],
ah->arp_dha[2],
ah->arp_dha[3],
ah->arp_dha[4],
ah->arp_dha[5]
);
printf("TARGET IP address: %02d:%02d:%02d:%02d\n",
ah->arp_dpa[0],
ah->arp_dpa[1],
ah->arp_dpa[2],
ah->arp_dpa[3]
);
printf("H/D TYPE : %x PROTO TYPE : %x \n",ah->arp_hd,ah->arp_pr);
printf("H/D leng : %x PROTO leng : %x \n",ah->arp_hdl,ah->arp_prl);
printf("OPERATION : %x \n", ah->arp_op);
sent = sendto(s, buffer, BUF_SIZE, 0, (struct
sockaddr*)&socket_address, sizeof(socket_address));
if (sent == -1)
{
perror("sendto():");
exit(1);
}
answered_packets++;
}
total_packets++;
}
}
void sigint(int signum) {
/*Clean up.......*/
struct ifreq ifr;
if (s == -1)
return;
strncpy(ifr.ifr_name, DEVICE, IFNAMSIZ);
ioctl(s, SIOCGIFFLAGS, &ifr);
ifr.ifr_flags &= ~IFF_PROMISC;
ioctl(s, SIOCSIFFLAGS, &ifr);
close(s);
free(buffer);
printf("Server terminating....\n");
printf("Totally received: %ld packets\n", total_packets);
printf("Answered %ld packets\n", answered_packets);
exit(0);
}
बेस्ट प्रपत्र [पूछें @ Wireshark] (http://ask.wireshark.org/questions/), यह अपने पीसी पर अन्य आवेदन के लिए पैकेट से पता चलता **? ** –
हाँ, मैं देख सकता हूँ करता है पैकेट अन्य अनुप्रयोगों। – dsharew
समस्या कोड से होनी चाहिए, लेकिन संकलक इसे स्पॉट करने में सक्षम नहीं है। – dsharew