#!/usr/sbin/ez-ipupdate -c

#

# example config file for ez-ipupdate

#

# this file is actually executable!

#

service-type=dnsexit

user=loginname:password

host=www.yourdomain.com

interface=eth0

# please ensure the user has permission to write this file

cache-file=/tmp/ez-ipupdate.cache

run-as-user=ez-ipupd

# uncomment this once you have everything working how you want and you are

# ready to have ez-ipupdate running in the background all the time. to stop it

# you can use "killall -QUIT ez-ipupdate" under linux.

#daemon

#define DNSEXIT_DEFAULT_SERVER "www.dnsexit.com"

#define DNSEXIT_DEFAULT_PORT "80"

#define DNSEXIT_REQUEST "/RemoteUpdate.sv"

int DNSEXIT_update_entry(void);

int DNSEXIT_check_info(void);

static char *DNSEXIT_fields_used[] = { "server", "user", "address", "wildcard", "mx", "host", NULL };

  { "dnsexit",

	{ "dnsexit", 0, 0, },

	NULL,

	DNSEXIT_update_entry,

	DNSEXIT_check_info,

	DNSEXIT_fields_used,

	DNSEXIT_DEFAULT_SERVER,

	DNSEXIT_DEFAULT_PORT,

	DNSEXIT_REQUEST

  },	  

int DNSEXIT_check_info(void)

{

  char buf[BUFSIZ+1];

  if((host == NULL) || (*host == '\0'))

  {

    if(options & OPT_DAEMON)

    {

      return(-1);

    }

    if(host) { free(host); }

    printf("host: ");

    *buf = '\0';

    fgets(buf, BUFSIZ, stdin);

    host = strdup(buf);

    chomp(host);

  }

  if(interface == NULL && address == NULL)

  {

    if(options & OPT_DAEMON)

    {

      fprintf(stderr, "you must provide either an interface or an address\n");

      return(-1);

    }

    if(interface) { free(interface); }

    printf("interface: ");

    *buf = '\0';

    fgets(buf, BUFSIZ, stdin);

    chomp(buf);

    option_handler(CMD_interface, buf);

  }

  warn_fields(service->fields_used);

  return 0;

}

int DNSEXIT_update_entry(void)

{

  char buf[BUFFER_SIZE+1];

  char *bp = buf;

  int bytes;

  int btot;

  int ret;

  buf[BUFFER_SIZE] = '\0';

  if(do_connect((int*)&client_sockfd, server, port) != 0)

  {

    if(!(options & OPT_QUIET))

    {

      show_message("error connecting to %s:%s\n", server, port);

    }

    return(UPDATERES_ERROR);

  }

  snprintf(buf, BUFFER_SIZE, "GET %s?action=edit&", request);

  output(buf);

  if(address != NULL && *address != '\0')

  {

    snprintf(buf, BUFFER_SIZE, "%s=%s&", "myip", address);

    output(buf);

  }

  snprintf(buf, BUFFER_SIZE, "%s=%s&", "wildcard", wildcard ? "ON" : "OFF");

  output(buf);

  snprintf(buf, BUFFER_SIZE, "%s=%s&", "mx", mx);

  output(buf);

  snprintf(buf, BUFFER_SIZE, "%s=%s&", "backmx", *mx == '\0' ? "NO" : "YES");

  output(buf);

  snprintf(buf, BUFFER_SIZE, "%s=%s&", "host", host);

  output(buf);

  snprintf(buf, BUFFER_SIZE, "%s=%s&", "login", user_name);

  output(buf);

  snprintf(buf, BUFFER_SIZE, "%s=%s&", "password", password);

  output(buf);

  snprintf(buf, BUFFER_SIZE, " HTTP/1.0\015\012");

  output(buf);

  snprintf(buf, BUFFER_SIZE, "Authorization: Basic %s\015\012", auth);

  output(buf);

  snprintf(buf, BUFFER_SIZE, "User-Agent: %s-%s %s [%s] (%s)\015\012",

      "ez-update", VERSION, OS, (options & OPT_DAEMON) ? "daemon" : "", "by Angus Mackay");

  output(buf);

  snprintf(buf, BUFFER_SIZE, "Host: %s\015\012", server);

  output(buf);

  snprintf(buf, BUFFER_SIZE, "\015\012");

  output(buf);

  bp = buf;

  bytes = 0;

  btot = 0;

  while((bytes=read_input(bp, BUFFER_SIZE-btot)) > 0)

  {

    bp += bytes;

    btot += bytes;

    dprintf((stderr, "btot: %d\n", btot));

  }

  close(client_sockfd);

  buf[btot] = '\0';

  dprintf((stderr, "server output: %s\n", buf));

  if(sscanf(buf, " HTTP/1.%*c %3d", &ret) != 1)

  {

    ret = -1;

  }

  switch(ret)

  {

    case -1:

      if(!(options & OPT_QUIET))

      {

        show_message("strange server response, are you connecting to the right server?\n");

      }

      return(UPDATERES_ERROR);

      break;

    case 200:

      if(strstr(buf, "0=Success") != NULL)

      {

        if(!(options & OPT_QUIET))

        {

          printf("Request successful\n");

        }

      }

      else if(strstr(buf, "1=IP stays same") != NULL)

      {

        if(!(options & OPT_QUIET))

        {

          printf("Request successful but the IP is the same as previous update\n");

        }

      }

      else

      {

        show_message("Errors return from server\n");

        if(!(options & OPT_QUIET))

        {

          fprintf(stderr, "server output: %s\n", buf);

        }

        return(UPDATERES_ERROR);

      }

      break;

    case 401:

      if(!(options & OPT_QUIET))

      {

        show_message("authentication failure\n");

      }

      return(UPDATERES_SHUTDOWN);

      break;

    default:

      if(!(options & OPT_QUIET))

      {

        // reuse the auth buffer

        *auth = '\0';

        sscanf(buf, " HTTP/1.%*c %*3d %255[^\r\n]", auth);

        show_message("unknown return code: %d\n", ret);

        show_message("server response: %s\n", auth);

      }

      return(UPDATERES_ERROR);

      break;

  }

  return(UPDATERES_OK);

}