#include <stdio.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include<unistd.h>
#include <threads.h>
#define MAX 80
#define PORT 9090
#define SA struct sockaddr
// Function designed for chat between client and server.
void func(int connfd)
{
char buff[MAX];
int n=0;
// infinite loop for chat
for (;;)
{
bzero(buff, MAX);
// read the message from client and copy it in buffer
read(connfd, buff, sizeof(buff));
// print buffer which contains the client contents
printf("I am Server || Msg from client ==>> %s\n", buff);
bzero(buff, MAX);
// copy server message in the buffer
//while ((buff[n++] = getchar()) != '\n')
;
sprintf(buff,"** got !! msg %d from Server **\n",n);
// and send that buffer to client
write(connfd, buff, sizeof(buff));
// if msg contains "Exit" then server exit and chat ended.
if (strncmp("exit", buff, 4) == 0) {
printf("Server Exit...\n");
// break;
}
sleep(2);
n++;
}
}
void client_func(int sockfd)
{
char buff[MAX];
int n=0;
for (;;)
{
bzero(buff, sizeof(buff));
//printf("Enter the string : ");
n++;
// while ((buff[n++] = getchar()) != '\n')
// ;
sprintf(buff,"Msg %d to server !!\n",n);
write(sockfd, buff, sizeof(buff));
bzero(buff, sizeof(buff));
read(sockfd, buff, sizeof(buff));
printf("I am Client || Msg From Server : %s\n", buff);
if ((strncmp(buff, "exit", 4)) == 0) {
printf("Client Exit...\n");
// break;
}
}
}
int create_client(void* arg){
int sockfd, connfd;
struct sockaddr_in servaddr, cli;
// socket create and verification
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));
// assign IP, PORT
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
servaddr.sin_port = htons(PORT);
// connect the client socket to server socket
if (connect(sockfd, (SA*)&servaddr, sizeof(servaddr)) != 0) {
printf("connection with the server failed...\n");
exit(0);
}
else
printf("connected to the server..\n");
// function for chat
client_func(sockfd);
// close the socket
close(sockfd);
return 0;
}
// Driver function
int main()
{
int sockfd, connfd, len;
struct sockaddr_in servaddr, cli;
thrd_t client_thrd_handle;
// socket create and verification
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));
// assign IP, PORT
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
servaddr.sin_port = htons(PORT);
// Binding newly created socket to given IP and verification
if ((bind(sockfd, (SA*)&servaddr, sizeof(servaddr))) != 0) {
printf("socket bind failed...\n");
exit(0);
}
else
printf("Socket successfully binded..\n");
//creating client on sepearte thread
thrd_create(&client_thrd_handle,create_client,NULL);
// Now server is ready to listen and verification
if ((listen(sockfd, 5)) != 0) {
printf("Listen failed...\n");
exit(0);
}
else
printf("Server listening..\n");
len = sizeof(cli);
// Accept the data packet from client and verification
connfd = accept(sockfd, (SA*)&cli, &len);
if (connfd < 0) {
printf("server accept failed...\n");
exit(0);
}
else
printf("server accept the client...\n");
// Function for chatting between client and server
func(connfd);
// After chatting close the socket
close(sockfd);
thrd_join(client_thrd_handle,NULL);
}