ADDRESS RESOLUTION PROTOCOL (ARP) USING SOCKETS
By karthick
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IMPLEMENTATION OF ADDRESS RESOLUTION PROTOCOL (ARP) USING SOCKETS
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Server program
#include<stdio.h>
#include<sys/socket.h>
#include<netdb.h>
#include<string.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<stdlib.h>
int
main()
{
int sd,sd1,i,clilen,byterecv,sport;
struct sockaddr_in ser,cli;
char smsg[1024],rmsg[1024];
char
ip[5][50]={"192.1.1.134","192.1.1.135","192.1.1.136","192.1.1.137",
"192.1.138"};
char
mac[5][50]={"00-01-6C-47-EB-D3","00-01-6C-47-EB-D4",
"00-01-6C-47-EB-D5","-01-6C-47-EB-D6","00-01-6C-47-EB-D7"};
printf("\n\t
Enter the Port : ");
scanf("%d",&sport);
if((sd=socket(AF_INET,SOCK_STREAM,0))<0)
{
printf("\n\t Error in socket");
return 0;
}
bzero(&ser,sizeof(ser));
ser.sin_family=AF_INET;
ser.sin_port=htons(sport);
ser.sin_addr.s_addr=htonl(INADDR_ANY);
if(bind(sd,(struct
sockaddr*)&ser,sizeof(ser)) <0)
{
printf("\n\t Error in bind");
return 0;
}
if(listen(sd,5)
<0)
{
printf("\n\t Error in Listen");
return 0;
}
clilen=sizeof(cli);
if((sd1=accept(sd,(struct
sockaddr*)&cli,&clilen)) <0)
{
printf("\n\t Error in Accept");
return 0;
}
printf("\n\t Accepted ");
while(1)
{
byterecv=recv(sd1,rmsg,1024,0);
rmsg[byterecv]='\0';
if(strcmp(rmsg,"exit")==0)
{
close(sd1);
close(sd);
break;
}
else
for(i=0;i<5;i++)
{
if(strcmp(ip[i],rmsg)==0)
{
strcpy(smsg,mac[i]);
printf("\nRecv ip address
=%s",rmsg);
printf("\nThe MAC address
=%s",mac[i]);
break;
}
}
send(sd1,smsg,strlen(smsg),0);
}
printf("\n");
return 0;
}
Client program
#include<stdio.h>
#include<sys/socket.h>
#include<netdb.h>
#include<string.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<stdlib.h>
int
main()
{
int sd,sd1,i,clilen,byterecv,sport;
struct sockaddr_in ser,cli;
char smsg[1024],rmsg[1024];
printf("\n\t
Enter the Port : ");
scanf("%d",&sport);
if((sd=socket(AF_INET,SOCK_STREAM,0))<0)
{
printf("\n\t Error in socket");
return 0;
}
bzero(&ser,sizeof(ser));
ser.sin_family=AF_INET;
ser.sin_port=htons(sport);
ser.sin_addr.s_addr=htonl(INADDR_ANY);
if(connect(sd,(struct
sockaddr*)&ser,sizeof(ser)) <0)
{
printf("\n\t Error in connect");
return 0;
}
while(1)
{
printf("\nEnter the ip address " );
scanf("%s",smsg);
if(strcmp(smsg,"exit")!=0)
{
send(sd,smsg,strlen(smsg),0);
}
else
{
send(sd,smsg,strlen(smsg),0);
close(sd);
break;
}
byterecv=recv(sd,rmsg,1024,0);
rmsg[byterecv]='\0';
printf("send
mac address = %s",rmsg);
}
return
0;
}
OUTPUT
SERVER
[11ca013@mcalinux
network]$ cc 10arpser.c
[11ca013@mcalinux
network]$ ./a.out
Enter the Port : 3326
Accepted
Recv
ip address =192.1.1.134
The
MAC address =00-01-6C-47-EB-D3
Recv
ip address =192.1.1.135
The
MAC address =00-01-6C-47-EB-D4
Recv
ip address =192.1.1.136
The
MAC address =00-01-6C-47-EB-D5
Recv
ip address =192.1.1.137
The
MAC address =00-01-6C-47-EB-D6
CLIENT
[11ca013@mcalinux
network]$ cc 11rarpcli.c
[11ca013@mcalinux
network]$ ./a.out
Enter the Port : 3326
Enter
the MAC address 192.1.1.134
The
recv IP address = 00-01-6C-47-EB-D3
Enter
the MAC address 192.1.1.135
The
recv IP address = 00-01-6C-47-EB-D4
Enter
the MAC address 192.1.1.136
The
recv IP address = 00-01-6C-47-EB-D5
Enter
the MAC address 192.1.1.137
The
recv IP address = 00-01-6C-47-EB-D6
Enter
the MAC address exit
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