server.c

#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>
int main(int argc, char const* argv[])
{
	ssize_t valread;
	struct sockaddr_in address;
	int server_fd, new_socket;
	int opt = 1;
	socklen_t addrlen = sizeof(address);
	char buffer[1024] = { 0 };
	char* value = "Message from server";
	if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
		perror("socket failed");
		exit(EXIT_FAILURE);
	}
	if (setsockopt(server_fd, SOL_SOCKET,SO_REUSEADDR | SO_REUSEPORT, &opt,sizeof(opt))) {
		perror("setsockopt");
		exit(EXIT_FAILURE);
	}
	address.sin_family = AF_INET;
	address.sin_addr.s_addr = INADDR_ANY;
	address.sin_port = htons(8080);
	if (bind(server_fd, (struct sockaddr*)&address,sizeof(address))< 0) {
		perror("bind failed");
		exit(EXIT_FAILURE);
	}
	if (listen(server_fd, 3) < 0) {
		perror("listen");
		exit(EXIT_FAILURE);
	}
	if ((new_socket= accept(server_fd, (struct sockaddr*)&address,&addrlen))< 0) {
		perror("accept");
		exit(EXIT_FAILURE);
	}
	valread = read(new_socket, buffer,1024 - 1);
	printf("%s\n", buffer);
	send(new_socket, value, strlen(value), 0);
	printf("Request sent from server\n");
	close(new_socket);
	close(server_fd);
	return 0;
}