/*
 * lw12.c
 * Copyright (C) 2017 jpk <jpk@dwarf>
 *
 * Distributed under terms of the MIT license.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>

#include "lw12.h"


int lw12_connect(int *sockfd, struct sockaddr_in *addr, uint16_t port,
        char *hostname) {
    if ((*sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) {
        perror("socket");
        exit(EXIT_FAILURE);
    }

    memset((char *)addr, 0, sizeof(struct sockaddr_in));
    addr->sin_family = AF_INET;
    addr->sin_port = htons(port);
    inet_aton(hostname, &addr->sin_addr);

    return *sockfd;
}

int lw12_sendcmd(int sockfd, struct sockaddr_in *addr, char *cmd) {
    const socklen_t slen = sizeof(struct sockaddr_in);

    if (sendto(sockfd, cmd, LW12_CMD_LENGTH, 0, (const struct sockaddr *)addr,
                slen) == -1) {
        perror("sendto");
        close(sockfd);
        exit(EXIT_FAILURE);
    }

    return 0;
}