Skip to main content

TCP SOCKETS CHAT APPLICATION(SERVER & CLIENT) USING C


SERVER
#include<stdio.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netdb.h>
#include<stdlib.h>
#include<string.h>
#define MAX 80
#define PORT 43454
#define SA struct sockaddr
void func(int sockfd)
{
char buff[MAX];
int n;
for(;;)
{
bzero(buff,MAX);
read(sockfd,buff,sizeof(buff));
printf("From client: %s\t To client : ",buff);
bzero(buff,MAX);
n=0;
while((buff[n++]=getchar())!='\n');
write(sockfd,buff,sizeof(buff));
if(strncmp("exit",buff,4)==0)
{
printf("Server Exit...\n");
break;
}
}
}
int main()
{
int sockfd,connfd,len;
struct sockaddr_in servaddr,cli;
sockfd=socket(AF_INET,SOCK_STREAM,0);
if(sockfd==-1)
{
printf("socket creation failed...\n");
exit(0);
}
else
printf("Socket successfully created..\n");
bzero(&servaddr,sizeof(servaddr));
servaddr.sin_family=AF_INET;
servaddr.sin_addr.s_addr=htonl(INADDR_ANY);
servaddr.sin_port=htons(PORT);
if((bind(sockfd,(SA*)&servaddr, sizeof(servaddr)))!=0)
{
printf("socket bind failed...\n");
exit(0);
}
else
printf("Socket successfully binded..\n");
if((listen(sockfd,5))!=0)
{
printf("Listen failed...\n");
exit(0);
}
else
printf("Server listening..\n");
len=sizeof(cli);
connfd=accept(sockfd,(SA *)&cli,&len);
if(connfd<0)
{
printf("server acccept failed...\n");
exit(0);
}
else
printf("server acccept the client...\n");
func(connfd);
close(sockfd);
}

CLIENT
#include<stdio.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netdb.h>
#include<string.h>
#include<stdlib.h>
#define MAX 80
#define PORT 43454
#define SA struct sockaddr
void func(int sockfd)
{
char buff[MAX];
int n;
for(;;)
{
bzero(buff,sizeof(buff));
printf("Enter the string : ");
n=0;
while((buff[n++]=getchar())!='\n');
write(sockfd,buff,sizeof(buff));
bzero(buff,sizeof(buff));
read(sockfd,buff,sizeof(buff));
printf("From Server : %s",buff);
if((strncmp(buff,"exit",4))==0)
{
printf("Client Exit...\n");
break;
}
}
}

int main()
{
int sockfd,connfd;
struct sockaddr_in servaddr,cli;
sockfd=socket(AF_INET,SOCK_STREAM,0);
if(sockfd==-1)
{
printf("socket creation failed...\n");
exit(0);
}
else
printf("Socket successfully created..\n");
bzero(&servaddr,sizeof(servaddr));
servaddr.sin_family=AF_INET;
servaddr.sin_addr.s_addr=inet_addr("127.0.0.1");
servaddr.sin_port=htons(PORT);
if(connect(sockfd,(SA *)&servaddr,sizeof(servaddr))!=0)
{
printf("connection with the server failed...\n");
exit(0);
}
else
printf("connected to the server..\n");
func(sockfd);
close(sockfd);
}


OUTPUT
SERVER SIDE
$ cc tcpchatserver.c
$ ./a.out
Socket successfully created..
Socket successfully binded..
Server listening..
server acccept the client...
From client: hai
To client : hello
From client: exit
To client : exit
Server Exit...
$

CLIENT SIDE
$ cc tcpchatclient.c
$ ./a.out
Socket successfully created..
connected to the server..
Enter the string : hai
From Server : hello
Enter the string : exit
From Server : exit
Client Exit...
$ 
Labels:

Comments

  1. Swapnil22 July 2015 at 03:19

    nice ....

    ReplyDelete
  2. Unknown4 November 2015 at 05:36

    say no more

    ReplyDelete
  3. Unknown2 March 2016 at 10:39

    what are the changes required in order to send simultanous messages

    ReplyDelete
  4. Kavin Sharma25 November 2016 at 08:22

    How to make encrypted chat between client and server

    ReplyDelete
  5. Satyapal Singh18 April 2017 at 06:37

    can anyone tell me why is this code not running in code blocks?

    ReplyDelete
    Replies
    1. Unknown18 July 2017 at 07:05

      you can try it in linux terminal (Putty) . Code blocks is just an IDE . If you have windows OS you must have virtual machine (VMWare) so that you can enable putty

      Delete
  6. MyDiary Book5 May 2017 at 09:37

    how to run this in client terminal? ./client 127.0.0.1 is this correct? can any one please tell me?

    ReplyDelete
  7. Unknown23 May 2017 at 11:57

    How do i exit the connection for both ends?

    ReplyDelete
  8. Unknown2 May 2018 at 11:00

    anyone online?

    ReplyDelete
  9. Crispus22 June 2018 at 05:11

    cool stuff

    ReplyDelete
  10. Unknown30 October 2018 at 02:44

    connection with the server failed

    ReplyDelete
    Replies
    1. Andru31 October 2018 at 08:06

      because u haven't open the server yet maybe(?)

      Delete
  11. Couple Monitor18 May 2019 at 05:39

    Nice Article. I loved the way you describe everything about chat application. Looking forward to your blog.

    ReplyDelete
  12. slr10 July 2019 at 23:14

    Thanks.
    How can I add multiple clients to this chat system

    ReplyDelete
  13. extension lead23 August 2023 at 05:27

    extension-lead-10m-power-strip-1-socket-extension-cord-10-meter-1-way-single-socket-mains-electric-power-black-extension-cable-uk">10m black extension lead

    ReplyDelete
  14. extension lead3 September 2023 at 23:54

    8 gang surge protected extension lead<

    ReplyDelete
  15. extension lead25 October 2023 at 23:56

     5m extension lead with usb

    ReplyDelete

Post a Comment

Popular posts from this blog

CALCULATOR USING CONTROL ARRAY

Public curval As Double Public preval As Double Public choice As String Public result As Double Private Sub cmd_Click(Index As Integer) Text1.Text = Text1.Text &cmd(Index).Caption curval = Val(Text1.Text) End Sub Private Sub cmdac_Click() curval = preval = 0 Text1.Text = "" End Sub Private Sub cmddiv_Click() Text1.Text = "" preval = curval curval = 0 choice = "/" End Sub Private Sub cmdequal_Click() Select Case choice Case "+" result = preval + curval Text1.Text = Str(result) Case "-" result = preval - curval Text1.Text = Str(result) Case "*" result = preval * curval Text1.Text = Str(result) Case "/" result = preval / curval Text1.Text = Str(result) End Select curval = result End Sub Private Sub CMDEXIT_Click() End End Sub Private Sub cmdminus_Click() Text1.Text = "" preval = curval curval = 0 choice = "-" End Sub Private Sub cmdmul_Click() Text1.Text = "
2 comments
Read more

UDP SOCKETS CHAT APPLICATION (SERVER & CLIENT) USING C

SERVER #include<stdio.h> #include<netinet/in.h> #include<sys/types.h> #include<sys/socket.h> #include<netdb.h> #include<string.h> #include<stdlib.h> #define MAX 80 #define PORT 43454 #define SA struct sockaddr void func(int sockfd) { char buff[MAX]; int n,clen; struct sockaddr_in cli; clen=sizeof(cli); for(;;) { bzero(buff,MAX); recvfrom(sockfd,buff,sizeof(buff),0,(SA *)&cli,&clen); printf("From client %s To client",buff); bzero(buff,MAX); n=0; while((buff[n++]=getchar())!='\n'); sendto(sockfd,buff,sizeof(buff),0,(SA *)&cli,clen); if(strncmp("exit",buff,4)==0) { printf("Server Exit...\n"); break; } } } int main() { int sockfd; struct sockaddr_in servaddr; sockfd=socket(AF_INET,SOCK_DGRAM,0); if(sockfd==-1) { printf("socket creation failed...\n"); exit(0); } else printf("Socket successfully created..\n"); bzero(&servaddr,sizeof(s
5 comments
Read more

TCP SOCKET DATE AND TIME USING C

SERVER #include<stdio.h> #include<sys/types.h> #include<sys/socket.h> #include<netinet/in.h> #include<time.h> #include<string.h> #include<stdlib.h> #define max 30 #define PORT 2100 int main() { int sersoc,clisoc,conn,len,wri; char str[max]; pid_t pid; time_t ticks; socklen_t clilen; struct sockaddr_in servaddr,cliaddr; servaddr.sin_family=AF_INET; servaddr.sin_port=htons(PORT); servaddr.sin_addr.s_addr=htonl(INADDR_ANY); if((sersoc=socket(AF_INET,SOCK_STREAM,0))<0) { perror("Socket Error"); exit(0); } if(bind(sersoc,(struct sockaddr *)&servaddr,sizeof(servaddr))<0) { perror("Bind Error"); exit(0); } listen(sersoc,10); for(;;) { len=sizeof(cliaddr); conn=(accept(sersoc,(struct sockaddr *)&clisoc,&len)); if((pid=fork())==0) { close(sersoc); ticks=time(NULL); strcpy(str,ctime(&ticks)); if(wri==(write(conn,str,sizeof(str),0))<0) { printf("Write Error");
3 comments
Read more