A basic tcp server in C

simple-tcp-server.c

#include <stdio.h>
#include <unistd.h>
#include <netdb.h> 
#include <netinet/in.h> 
#include <stdlib.h> 
#include <string.h> 
#include <sys/socket.h> 
#include <sys/types.h> 
#include <errno.h>

#define PORT 8080 

// Driver function 
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(-1); 
	}

	int flag=1;
	if(setsockopt(sockfd, SOL_SOCKET, SO_REUSEPORT, &flag, sizeof(flag)) == -1) {
		printf("Setsockopt SO_REUSEPORT failed with errno %d\n", errno);
		exit(-1);
	}

	bzero(&servaddr, sizeof(servaddr)); 
	servaddr.sin_family = AF_INET; 
	servaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 
	servaddr.sin_port = htons(PORT); 
	if ((bind(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr))) != 0) { 
		printf("socket bind failed...\n"); 
		exit(-1); 
	} 

	while(1){
		if ((listen(sockfd, 1)) != 0) { 
			printf("Listen failed...\n"); 
			exit(-1); 
		}
		printf("listening on port %d\n",PORT);

		socklen_t len = sizeof(cli); 
		connfd = accept(sockfd, (struct sockaddr*)&cli, &len); 
		if (connfd < 0) { 
			printf("server acccept failed...\n"); 
			exit(-1); 
		}

		printf("server acccept the client...\n"); 
		write(connfd,"you got it\n",11);
		close(connfd); 
	}
}