Write a program using socket programming for TCP preferably in C.

//TCP Client

#include<sys/socket.h>

#include<sys/types.h>

#include<netinet/in.h>

#include<unistd.h>

#include<stdlib.h>

#include<stdio.h>

#include<string.h>

int main(int argc,char *argv[])

{

                int cont,create_socket,ch=1,j;

                int bufsize = 1024;

                char rd1[10];

                char *buffer= malloc(bufsize);

                char fname[256];

                struct sockaddr_in address;

      if ((create_socket = socket(AF_INET,SOCK_STREAM,0)) > 0)

                printf("The Socket was created\n");

                      address.sin_family = AF_INET;

                      address.sin_port = htons(10000);

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

                      if (connect(create_socket,(struct sockaddr *)  

           &address,sizeof(address))  == 0)

   printf("The connection was accepted with the server %s...\n",argv[1]);

                else

                printf("connect not succeded\n");

                while(ch==1)

                {

                                //scanf("%s",&rd);

                                gets(rd1);

                                cont=strlen(rd1);

                      send(create_socket,rd1,cont,0);

                                if(strcmp(rd1,"exit")==0)

                                {

                                                ch=0;

                                                break;

                                }

                                for(j=0;j<10;j++)

                                {

                                                rd1[j]=NULL;

            }

                                //strcpy(rd,"\0");

                                recv(create_socket,rd1,10,0);

                                printf("\n",rd1);

                                puts(rd1);

                                if(strcmp(rd1,"exit")==0)

                                {

                                                ch=0;

                                                break;

                                }

                }

      return close(create_socket);

}

// Output

student@mmcoe-desktop:~$ gcc ccli.c -o c1

student@mmcoe-desktop:~$ ./c1 172.16.1.138

The Socket was created

The connection was accepted with the server 172.16.1.138...

hi xyz

hello

how r u?

fine

bye

//TCP server

#include<sys/types.h>

#include<sys/socket.h>

#include<netinet/in.h>

#include<sys/stat.h>

#include<unistd.h>

#include<stdlib.h>

#include<stdio.h>

#include<string.h>

#include<fcntl.h>

int main()

{

     int cont,create_socket,new_socket,addrlen,fd;

      int bufsize = 1024,z,ch=1,j;

      char *buffer = malloc(bufsize);

      char rd[10];

      char error[15]="FILE NOT FOUND";

      char fname[256];

      struct sockaddr_in address;

     

     if ((create_socket = socket(AF_INET,SOCK_STREAM,0)) > 0)     /*opens  a network socket and returns a channel identifier  that may be used in future invocation of commands like read, puts  and flush.   At present only the TCP network protocol is supported;  future releases may include support for additional protocols.  The socket com‐ mand  may be used to open either the client or server side of a connection,

 depending on whether the -server switch is specified.*/

                               

printf("The socket was created\n");

address.sin_family = AF_INET;

address.sin_addr.s_addr = INADDR_ANY;

address.sin_port = htons(10000);

if (bind(create_socket,(struct sockaddr *)&address,sizeof(address)) == 0)

printf("Binding Socket\n");

listen(create_socket,3);

 printf("server listening\n");

addrlen = sizeof(struct sockaddr_in);

new_socket = accept(create_socket,(struct sockaddr *)&address,&addrlen);

printf("The Client %s is Connected...\n",inet_ntoa(address.sin_addr));

if (new_socket > 0)

  {

   while(ch==1)

  {

                //strcpy(rd,"\0");

                for(j=0;j<10;j++)

                {

                   rd[j]=NULL;

                }                    

                 recv(new_socket,rd,10,0);

                printf("\n",rd);

                puts(rd);

                if(strcmp(rd,"exit")==0)

                {

                  ch=0;

                  break;

                }

                //scanf("%s",&rd);

                gets(rd);

                cont=strlen(rd);

                send(new_socket,rd,cont,0);

                if(strcmp(rd,"exit")==0)

                {

                ch=0;

                break;

                }

       }

}

printf("Request Completed\n");

close(new_socket);

return close(create_socket);

}

// output

student@mmcoe-desktop:~$ gcc cser.c -o s1

student@mmcoe-desktop:~$ ./s1

The socket was created

Binding Socket

server listening

The Client 172.16.1.138 is Connected...

hi xyz

hello

how r u?

fine

bye