NPM- 3rd ex

3rd ex-

PROGRAM:

SERVER:

#include<sys/socket.h>

#include<stdio.h>

#include<netinet/in.h>

#include<arpa/inet.h>

#include<sys/types.h>

int main()

{

char buff[50];

socklen_t clilen;

struct sockaddr_in servaddr,cliaddr;

int sockfd,bfd,lfd,connfd,n;

time_t currenttime;

sockfd=socket(AF_INET,SOCK_STREAM,0);

if(sockfd<0)

printf("socket not created");

else

printf("created socket is %d\n",sockfd);

bzero(&servaddr,sizeof(servaddr));

servaddr.sin_family=AF_INET;

servaddr.sin_port=htons(8999);

servaddr.sin_addr.s_addr=htonl(INADDR_ANY);

bfd=bind(sockfd,(const struct sockaddr*)&servaddr,sizeof(servaddr));

if(bfd<0)

printf("not bound sucessfully");

else

printf("\n binding %d\n",bfd);

lfd=listen(sockfd,5);

printf("listening %d\n",lfd);

for(;;)

{

connfd=-1;

clilen=sizeof(cliaddr);

connfd=accept(sockfd,(struct sockaddr*)&cliaddr,&clilen);

if(connfd<0)

printf("connected socket %d\n",connfd);

currenttime=time(&cliaddr);

snprintf(buff,sizeof(buff),"%24s\n\n",ctime(&currenttime));

n=write(connfd,buff,sizeof(buff));

exit(0);

}

close(connfd);

}

 

CLIENT:

#include<sys/socket.h>

#include<stdio.h>

#include<netinet/in.h>

#include<arpa/inet.h>

#include<sys/types.h>

int main(int argc,char **argv)

{

 int sockfd,n,connfd;

 char msg[50];

 struct sockaddr_in servaddr;

 if(argc!=3)

 printf("argument error");

 sockfd=socket(AF_INET,SOCK_STREAM,0);

 printf("socket descriptor %d\n",sockfd);

 bzero(&servaddr,sizeof(servaddr));

 servaddr.sin_family=AF_INET;

 servaddr.sin_port=htons(atoi(argv[2]));

 inet_pton(AF_INET,argv[1],&servaddr.sin_addr);

 connfd=connect(sockfd,(const struct sockaddr*)&servaddr,sizeof(servaddr)

);

 if(connfd<0)

 printf("not connected");

 else

 printf("connected socket %d\n",connfd);

 n=recv(sockfd,msg,30,0);

 printf("%24s\n",msg);

}

OUTPUT:

SERVER:

[it86091@vecit ~]$ cc program3a.c

[it86091@vecit ~]$ ./a.out

created socket is 3

 binding 0

listening 0

[it86091@vecit ~]$

CLIENT:

[it86091@vecit ~]$ cc program3b.c

[it86091@vecit ~]$ ./a.out 172.16.6.4 8999

socket descriptor 3

connected socket 0

Tue Jan  1 13:34:56 2002

[it86091@vecit ~]$