Client Server Chat application with multithreading in C

Server.c

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <time.h>
#include <pthread.h>
#include <string.h>
int sockfd, newsockfd, portno, clilen,newsockfd1;
char buffer[256],buff[255];
struct sockaddr_in serv_addr, cli_addr;
int n,f,b;
int main( int argc, char *argv[] )
{

// time_t   now;
  //   struct tm *ts;
// now = time(0);
// ts = localtime(&now);

// strftime(buff, sizeof(buff), "%a %Y-%m-%d %H:%M:%S %Z", ts);
// printf("%s\n", buff);
/* First call to socket() function */
sockfd = socket(AF_INET, SOCK_STREAM, 0);

/* Initialize socket structure */
bzero((char *) &serv_addr, sizeof(serv_addr));
portno = 5001;
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);




/* Now bind the host address using bind() call.*/

bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr));

/* Now start listening for the clients, here process will * go in sleep mode and will wait for the incoming connection */
listen(sockfd,5);
clilen = sizeof(cli_addr);


/* Accept actual connection from the client */
newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr, &clilen);
newsockfd1=newsockfd;


/* If connection is established then start communicating */

//printf("Reply For Client : Please enter the message: ");
//fgets(buffer,255,stdin);
pid_t p;
p=fork();
if(p>0)
{
while(1==1){
n = read(newsockfd,buffer,255 );
printf("%s",buffer);
bzero(buffer,256);
}
}
else
{
while(1==1){
fgets(buff,255,stdin);

//n = write(newsockfd,buffer,255);
n = write (newsockfd,buff,255);
bzero(buff,256);}
}


return 0;
}

Client.c

#include <stdio.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <string.h>

int sockfd, portno, n,b;

struct sockaddr_in serv_addr;

//struct hostent *server;

char buffer[256],buff[256];

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

{

if (argc < 3)

{

fprintf(stderr,"usage %s hostname port\n", argv[0]);

return 0;

}

portno = atoi(argv[2]);

/* Create a socket point */

sockfd = socket(AF_INET, SOCK_STREAM, 0);

bzero((char *) &serv_addr, sizeof(serv_addr));

serv_addr.sin_family = AF_INET;

serv_addr.sin_port = htons(portno);

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

/* Now connect to the server */

connect(sockfd,(struct sockaddr *) &serv_addr,sizeof(serv_addr));

/* Now ask for a message from the user, this message * will be read by server */

pid_t p;

p=fork();

if(p>0){

while(1==1)

{

// printf("");

bzero(buffer,256);

fgets(buffer,255,stdin);

/* Send message to the server */

n = write(sockfd,buffer,255);

}

}

else

{

while(1==1){

/* Now read server response */

n = read(sockfd,buff,255);

printf("%s",buff);

bzero(buff,256);

}}

return 0;

}

Input Search:

• Client Server Multithreading
• Multithreading Socket Programing in C
• Client  Server Socket Programing
• Client Server Multithreading Socket Programming.