#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#define MYPORT “3490” // the port users will be connecting to
#define BACKLOG 10 // how many pending connections queue will hold
int main(void) {
    struct sockaddr_storage their_addr;
    socklen_t addr_size;
    struct addrinfo hints, *res;
    int sockfd, new_fd;
    // !! don’t forget your error checking for these calls!!!
    // first load up address structs with getaddrinfo()
    memset(&hints, 0, sizeof hints);
    hints.ai_family = AF_UNSPEC;
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_flags = AI_PASSIVE;
    gettaddrinfo(NULL, MYPORT, &hints, &res);
    // make a socket, bind it, and listen on it:
    sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
    bind(sockfd, res->ai_addr, res->ai_addrlen);
    listen(sockfd, BACKLOG);
    // now accept an incoming connection:
    addr_size = sizeof their_addr;
    new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &addr_size);
    // ready to communicate on socket descriptor new_fd