TCP Client Server Implementation in C

 TCPServer.c

#include "sys/types.h"
#include
#include
#include
#include
void main(){
 
  int sfd,clisize,cfd,port;
  struct sockaddr_in server,client;
  char msg1[50]="",msg2[50]="";
  sfd = socket(AF_INET,SOCK_STREAM,0);
  if(sfd==-1){
    printf("\nCannot Create Socket");
  }
  printf("\nEnter the port address:");
  scanf("%d",&port);
  server.sin_family = AF_INET;
  server.sin_port = port;
  server.sin_addr.s_addr = inet_addr("127.0.0.1");
  if(bind(sfd,(struct sockaddr *)&server,sizeof(server))!=0){
    printf("\nCannot Bind");
  }
  if(listen(sfd,0)!=0){
    printf("\nError In Listening");
  }
  printf("\nServer Ready and Waiting for Client.............\n");
  clisize = sizeof(client);
  cfd = accept(sfd,(struct sockaddr *)&client,&clisize);
  if(cfd==-1){
    printf("\nCannot Accept client Socket");
  }
  for(;;){
  recv(cfd,msg1,sizeof(msg1),0);
  printf("\nClient:%s",msg1);
  printf("\nServer :");
  scanf("%s",msg2);
  send(cfd,msg2,sizeof(msg2),0);
   if(strcmp(msg2,"end")==0)
    break;
  }
  close(sfd);
  close(cfd);
}

TCPClient.c

#include
#include
#include
#include
#include
void main(){
  struct sockaddr_in server,client;
  int sfd,port;
  char msg1[50]="",msg2[50]="";
  sfd = socket(AF_INET,SOCK_STREAM,0);
  if(sfd ==-1){
    printf("\nCannot Create socket");
  }
  printf("\nEnter the port address:");
  scanf("%d",&port);
  server.sin_family = AF_INET;
  server.sin_port = port;
  server.sin_addr.s_addr = inet_addr("127.0.0.1");
  printf("\nClient Ready");
  if(connect(sfd,(struct sockaddr *)&server,sizeof(server))!=0){
    printf("\nCannot Connect");
  }
  for(;;){
  printf("\nClient:");
  scanf("%s",msg1);
  send(sfd,msg1,sizeof(msg1),0);
  recv(sfd,msg2,sizeof(msg2),0);
  printf("\nServer:%s",msg2);
  if(strcmp(msg2,"end")==0)
    break;
 
 
  }
  close(sfd);
}

OUPUT
sarju@krishnakripa:~$ gcc TCPServer.c -o server
sarju@krishnakripa:~$ ./server

Enter the port address:2002

Server Ready and Waiting for Client.............

Client:hi
Server :hi

Client:end
Server :end
sarju@krishnakripa:~$

sarju@krishnakripa:~$ gcc TCPClient.c -o client
sarju@krishnakripa:~$ ./client

Enter the port address:2002

Client Ready
Client:hi
 
Server:hi
Client:end

Server:endsarju@krishnakripa:~$