NPM- 4th ex

4th ex:-

PROGRAM:

SERVER:

#include<sys/types.h>

#include<stdio.h>

#include<sys/socket.h>

#include<netinet/in.h>

#include<arpa/inet.h>

int main()

{

 int n,m,sockfd,bfd,len;

 struct sockaddr_in servaddr,cliaddr;

 char msg[50],buf[50];

 sockfd=socket(AF_INET,SOCK_DGRAM,0);

 if(sockfd<0)

 printf("\n server not created");

 else

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

 bzero(&servaddr,sizeof(servaddr));

 servaddr.sin_family=AF_INET;

 servaddr.sin_port=htons(6043);

 servaddr.sin_addr.s_addr=htonl(INADDR_ANY);

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

 if(bfd<0)

 printf("error");

 else

 printf("binding %d \n",bfd);

 for(;;)

 {

  len=sizeof(cliaddr);

  n=recvfrom(sockfd,msg,50,0,(struct sockaddr*)&cliaddr,&len);

  printf("\n message from client: %s \n",msg);

  if(strcmp(msg,"bye")==0)

  exit(0);

  printf("\n enter the message: ");

  scanf("%s",buf);

  m=sendto(sockfd,buf,50,0,(struct sockaddr*)&cliaddr,len);

 }

 exit(0);

}

CLIENT:

#include<sys/types.h>

#include<sys/socket.h>

#include<netinet/in.h>

#include<arpa/inet.h>

int main()

{

 int n,m,sockfd,len;

 struct sockaddr_in servaddr;

 char msg[50],buf[50];

 sockfd=socket(AF_INET,SOCK_DGRAM,0);

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

 bzero(&servaddr, sizeof(servaddr));

 servaddr.sin_family=AF_INET;

 servaddr.sin_port=htons(6043);

 for(;;)

 {

  len=sizeof(servaddr);

  printf("\n enter message");

  scanf("%s",msg);

  n=sendto(sockfd,msg,50,0,(struct sockaddr*)&servaddr,len);

  if(strcmp(msg,"bye")==0)

  exit(0);

  m=recvfrom(sockfd,buf,50,0,(struct sockaddr*)NULL,NULL);

  printf("\n message from server %d",buf);

  if(strcmp(buf,"bye")==0)

  exit(0);

 }

 close(sockfd);

}

OUTPUT:

SERVER:

[it86091@vecit ~]$ cc prog4a.c

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

created socket is3

binding0

 message from client:hi

enter the message:welcome

 message from client:bye

[it86091@vecit ~]$

CLIENT:

[it86091@vecit ~]$ cc prog4b.c

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

socketdescription 3

enter message:hi

 message from server:welcome

enter message:bye

[it86091@vecit ~]$