training_repo/Concurrent_Server_Multithreading/server.c

#include<stdio.h>
#include<arpa/inet.h>
#include<stdlib.h>
#include<unistd.h>
#include<string.h>
#include<pthread.h>
#define port 8081

pthread_t t1;
int i=0;

void* thread_fun(void* n) {
    char buffer[100];
    int read_size = 0;
    int sockfd = *(int*)n;  

    printf("Inside thread function\n");

    while(1)
    {
    read_size = read(sockfd, buffer, sizeof(buffer) - 1); // Leave space for null terminator

    if (read_size < 0) {
        perror("Read error");
    } else if (read_size == 0) {
        printf("Client disconnected\n");
        return NULL;
    } else {
        buffer[read_size] = '\0';
        printf("Received data: %s\n", buffer);
    }
    }

    close(sockfd);

    return NULL;
}


int main()
{
    int sockfd,*newfd;
    struct sockaddr_in address;
    int addrlen = sizeof(address);

    if((sockfd=socket(AF_INET,SOCK_STREAM,0))<0)
        perror("socket failed\n");
    
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(port);

    if((bind(sockfd,(struct sockaddr*)&address,sizeof(address)))<0)
            perror("bind failed\n");

       if((listen(sockfd,3))<0)
            perror("server listening failed\n");
       else
           printf("server listening\n");
       
       while(1)
       {
           newfd = malloc(sizeof(int));

           *newfd=accept(sockfd,(struct sockaddr*)&address,(socklen_t*)&addrlen);

           if(*newfd<0)
           {
              perror("accept failed\n");
           }
           else
               printf("client connected\n");

          
           
           if(pthread_create(&t1,NULL,thread_fun,newfd)==0)
               printf("new thread created\n"); 
       }

       pthread_detach(t1);
    

}