CLIENT SERVER APPLICATION FOR CHAT

SERVER SIDE:

#include<stdio.h>

#include<sys/types.h>

#include<sys/socket.h>

#include<netinet/in.h>

#include<string.h>

int main(int argc,char **argv)

{

int len;

int listenfd,connfd,n;

int i,j,k=0,l,count=0;

struct sockaddr_in servaddr,cliaddr;

char buff[1024];

char str[1000];

listenfd=socket(AF_INET,SOCK_STREAM,0);

if(listenfd<0)

perror("cant create socket");

bzero(&servaddr,sizeof(servaddr));

servaddr.sin_family=AF_INET;

servaddr.sin_addr.s_addr=INADDR_ANY;

servaddr.sin_port=htons(20060);

bind(listenfd,(struct sockaddr *)&servaddr,sizeof(servaddr));

listen(listenfd,5);

len=sizeof(cliaddr);

connfd=accept(listenfd,(struct sockaddr *)&cliaddr,&len);

n=read(connfd,buff,1024);

printf("\n received message is %s\t",buff);

l=strlen(buff);

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

{

if(buff[i]=='l')

{

k=i;

count=0;

while(buff[k]=='l')

{

count++;

k++;

if(count==5)

{

for(j=k;j<l-1;j++)

buff[j]=buff[j+1];

l--;

buff[l]=='\0';

break;

}

i=k;

}

}

}

printf("\n unstuffed string is %s\n",buff);

close(connfd);

return 0;

}

CLIENT SIDE:

#include<stdio.h>

#include<sys/types.h>

#include<sys/socket.h>

#include<netinet/in.h>

#include<string.h>

int main(int argc,char **argv)

{

int len;

int sockfd,n,connfd;

int l,k=0,i,j,count=0;

struct sockaddr_in servaddr,cliaddr;

char buff[1024];

char str[1000];

sockfd=socket(AF_INET,SOCK_STREAM,0);

if(sockfd<0)

perror("cannot create socket");

bzero(&servaddr,sizeof(servaddr));

servaddr.sin_family=AF_INET;

servaddr.sin_addr.s_addr=inet_addr("20.30.1.211");

servaddr.sin_port=htons(20060);

connect(sockfd,(struct sockaddr *)&servaddr,sizeof(servaddr));

printf("\n enter the message");

scanf("%s",buff);

l=strlen(buff);

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

{

if(buff[i]=='l');

{

k=i;

count=0;

while(buff[k]=='l');

{

count++;

k++;

if(count==5)

{

for(j=l;j>k;j--)

{

buff[j]=buff[j-1];

buff[k]='0';

l++;

break;

}

i=k;

}

}

}

}

printf("\n the bit stuffed string is %s\t",buff);

n=write(sockfd,buff,1024);

close(sockfd);

return 0;

}

OUTPUT:

SERVER SIDE:

"serv.c" 53L, 980C written

[ME04@TELNET ~]$ cc serv.c

[ME04@TELNET ~]$ ./a.out

received message is hi

unstuffed string is hi

[ME04@TELNET ~]$ vi serv.c

CLIENT CLIENT:

"cli.c" 53L, 907C written

[ME04@TELNET ~]$ cc cli.c

[ME04@TELNET ~]$ ./a.out

 enter the message hi server...

 the bit stuffed string is hi