#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>    /* Internet domain header */
#include <netdb.h>
#include <sys/socket.h>
#include <arpa/inet.h>

int main() {
    // create socket
    int soc = socket(AF_INET, SOCK_STREAM, 0);
    if (soc == -1) {
        perror("client: socket");
        exit(1);
    }


    //initialize server address    
    struct sockaddr_in server;
    server.sin_family = AF_INET;
    server.sin_port = htons(54321);  
    memset(&server.sin_zero, 0, 8);
    
    struct addrinfo *ai;
    char * hostname = "teach.cs.toronto.edu";

    /* this call declares memory and populates ailist */
    getaddrinfo(hostname, NULL, NULL, &ai);
    server.sin_addr = ((struct sockaddr_in *) ai->ai_addr)->sin_addr;


    // free the memory that was allocated by getaddrinfo for this list
    freeaddrinfo(ai);

    int ret = connect(soc, (struct sockaddr *)&server, sizeof(struct sockaddr_in));
    if (ret == -1) {
        perror("client: connect");
        exit(1);
    }

    printf("Connect returned %d\n", ret);

    char buf[10];
    read(soc, buf, 7);
    buf[7] = '\0';
    printf("I read %s\n", buf);

    write(soc, "0123456789", 10);
    return 0;
}