/****************************************************************************
 * examples/sendmail/sendmail_maini.c
 *
 *   Copyright (C) 2009, 2011, 2020 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name Gregory Nutt nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

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

#include <net/if.h>
#include <arpa/inet.h>
#include <netinet/in.h>

#include <nuttx/net/ip.h>
#include "netutils/netlib.h"
#include "netutils/smtp.h"

/****************************************************************************
 * Pre-processor Defintitions
 ****************************************************************************/

#ifndef CONFIG_EXAMPLES_SENDMAIL_RECIPIENT
#  error "You must provide CONFIG_EXAMPLES_SENDMAIL_RECIPIENT"
#endif

#ifndef CONFIG_EXAMPLES_SENDMAIL_IPADDR
#  error "You must provide CONFIG_EXAMPLES_SENDMAIL_IPADDR"
#endif

#ifndef CONFIG_EXAMPLES_SENDMAIL_DRIPADDR
#  error "You must provide CONFIG_EXAMPLES_SENDMAIL_DRIPADDR"
#endif

#ifndef CONFIG_EXAMPLES_SENDMAIL_NETMASK
#  error "You must provide CONFIG_EXAMPLES_SENDMAIL_NETMASK"
#endif

#ifndef CONFIG_EXAMPLES_SENDMAIL_SENDER
#  define CONFIG_EXAMPLES_SENDMAIL_SENDER "nuttx-testing@example.com"
#endif

#ifndef CONFIG_EXAMPLES_SENDMAIL_SUBJECT
#  define CONFIG_EXAMPLES_SENDMAIL_SUBJECT "Testing SMTP from NuttX"
#endif

#ifndef CONFIG_EXAMPLES_SENDMAIL_BODY
#  define CONFIG_EXAMPLES_SENDMAIL_BODY "Test message sent by NuttX"
#endif

/****************************************************************************
 * Private Data
 ****************************************************************************/

static const char g_host_name[] = "localhost";
static const char g_recipient[] = CONFIG_EXAMPLES_SENDMAIL_RECIPIENT;
static const char g_sender[]    = CONFIG_EXAMPLES_SENDMAIL_SENDER;
static const char g_subject[]   = CONFIG_EXAMPLES_SENDMAIL_SUBJECT;
static const char g_msg_body[]  = CONFIG_EXAMPLES_SENDMAIL_BODY "\r\n";

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: sendmail_main
 ****************************************************************************/

int main(int argc, FAR char *argv[])
{
  struct in_addr addr;
#if defined(CONFIG_EXAMPLES_SENDMAIL_NOMAC)
  uint8_t mac[IFHWADDRLEN];
#endif
  void *handle;

  printf("sendmail: To: %s\n", g_recipient);
  printf("sendmail: From: %s\n", g_sender);
  printf("sendmail: Subject: %s\n", g_subject);
  printf("sendmail: Body: %s\n", g_msg_body);

  /* Many embedded network interfaces must have a software assigned MAC */

#ifdef CONFIG_EXAMPLES_SENDMAIL_NOMAC
  mac[0] = 0x00;
  mac[1] = 0xe0;
  mac[2] = 0xde;
  mac[3] = 0xad;
  mac[4] = 0xbe;
  mac[5] = 0xef;
  netlib_setmacaddr("eth0", mac);
#endif

  /* Set up our host address */

  addr.s_addr = HTONL(CONFIG_EXAMPLES_SENDMAIL_IPADDR);
  netlib_set_ipv4addr("eth0", &addr);

  /* Set up the default router address */

  addr.s_addr = HTONL(CONFIG_EXAMPLES_SENDMAIL_DRIPADDR);
  netlib_set_dripv4addr("eth0", &addr);

  /* Setup the subnet mask */

  addr.s_addr = HTONL(CONFIG_EXAMPLES_SENDMAIL_NETMASK);
  netlib_set_ipv4netmask("eth0", &addr);

  /* New versions of netlib_set_ipvXaddr will not bring the network up,
   * So ensure the network is really up at this point.
   */

  netlib_ifup("eth0");

  /* Then send the mail */

  net_ipaddr(addr.s_addr, 127, 0, 0, 1);
  handle = smtp_open();
  if (handle)
    {
      smtp_configure(handle, g_host_name, &addr.s_addr);
      smtp_send(handle, g_recipient, NULL, g_sender, g_subject,
                g_msg_body, strlen(g_msg_body));
      smtp_close(handle);
    }

  return 0;
}