String Reversal Server using TCP Sockets

Hello friends this post contains a server program and a client program using TCP socket in c .In this client send a string to the server and server reverse that string and resend to the client .

 Question :

The server and client processes should be made to run on different machines. Use TCP Sockets.

revserver.c

#include<stdio.h>
#include<ctype.h>
#include <netinet/in.h>
#include<stdlib.h>
#include<string.h>
#include<arpa/inet.h>
#include<sys/socket.h>
#include<unistd.h>
#define BUF_SIZE 1000

char* stringReverse(char *str){
   char ch;
   int length=strlen(str);
   for(int i=0;i<length/2;i++)
   {
      ch=str[i];
      str[i]=str[--length];
      str[length]=ch;
   }
  return str;
}
     
      int main(int argc , char *argv[])
              {
                char sbuffer[BUF_SIZE],rbuffer[BUF_SIZE];
                unsigned int len;
                int sockfd , newsockfd;
                unsigned short servport;

                servport = atoi(argv[1]);

                struct sockaddr_in serveraddress , clientaddress;
     
                 sockfd = socket(PF_INET , SOCK_STREAM,0);
                
                 serveraddress.sin_family = PF_INET;
                 serveraddress.sin_port   = htons(servport);
                 serveraddress.sin_addr.s_addr = INADDR_ANY;

                  bind(sockfd,(struct sockaddr *)&serveraddress,sizeof(serveraddress));
                  listen(sockfd,5);
                   printf("binding done Waiting for client:......\n");
                 
                 
                  
                    
                      while(1)
                           {
                              
                             len = sizeof(clientaddress);
                             newsockfd = accept(sockfd , (struct sockaddr *) &clientaddress , &len);
                         
          printf("connected to the client IP = %s \n and port number = %d\n",inet_ntoa(clientaddress.sin_addr),ntohs(clientaddress.sin_port));
                            while(newsockfd)
                            {
                             recv(newsockfd,rbuffer,BUF_SIZE,0);
                             printf("client message = %s\n",rbuffer);

                             char *ptr = stringReverse(rbuffer);
                             strcpy(sbuffer , ptr);
                     
                             send(newsockfd,sbuffer,strlen(sbuffer),0);
                             printf("send message = %s\n",sbuffer);
                             memset(rbuffer,'\0',strlen(sbuffer));
                             memset(sbuffer,'\0',strlen(rbuffer));
                           }
                       }
                  return 0;
                }

revclient.c 

#include<stdio.h>
#include<string.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<ctype.h>
#include<stdlib.h>
#include<netinet/in.h>
#define BUF_SIZE 1000
 
  int main(int argc , char *argv[])
          {
            int sockfd;
             char sbuffer[BUF_SIZE], rbuffer[BUF_SIZE];
            unsigned int servport;
            char* servip;
       
           servport = atoi(argv[1]);
           servip   = argv[2];
          
           struct sockaddr_in serveraddress;
           sockfd = socket(PF_INET,SOCK_STREAM,0);

           serveraddress.sin_port = htons(servport);
           serveraddress.sin_family = PF_INET;
           serveraddress.sin_addr.s_addr = inet_addr(servip);

           while(1)
                {
                 int con = connect(sockfd,(struct sockaddr *) &serveraddress,sizeof(serveraddress));
                printf("Enter string....\n");
                scanf("%s",sbuffer);
             if(sbuffer)
               {  
                send(sockfd,sbuffer,strlen(sbuffer),0);
                printf("send message = %s\n",sbuffer);
                recv(sockfd,rbuffer,BUF_SIZE,0);
                printf("server message = %s\n",rbuffer);
                memset(rbuffer,'\0',strlen(rbuffer));
                memset(sbuffer,'\0',strlen(sbuffer));
              }
               }
           return 0;
        }

output:

  

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