#include "open62541/config.h"

/*

 * Copyright (c) 2018-2022  Joachim Wiberg <troglobit@gmail.com>

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *     * Redistributions of source code must retain the above copyright

 *       notice, this list of conditions and the following disclaimer.

 *     * 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.

 *     * Neither the name of the copyright holders 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 HOLDERS 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.

 */

#define SYSLOG_NAMES

#include <ctype.h>

#include <stdio.h>

#include <stdarg.h>

#include <stdlib.h>

#include <string.h>

#include <syslog.h>

#include <time.h>

#include <unistd.h>

#include <sys/time.h>

#include "mdnsd.h"

#ifndef MAX

#define MAX(x,y) ((x) > (y) ? (x) : (y))

#endif

#ifndef INTERNAL_NOPRI    /* Illumos/SmartOS/Bionic */

#define INTERNAL_NOPRI 0x10

struct {

  char *c_name;

  int   c_val;

} prioritynames[] =

  {

    { "alert",   LOG_ALERT },

    { "crit",    LOG_CRIT },

    { "debug",   LOG_DEBUG },

    { "emerg",   LOG_EMERG },

    { "error",   LOG_ERR },

    { "err",     LOG_ERR },

    { "info",    LOG_INFO },

    { "none",    INTERNAL_NOPRI },

    { "notice",  LOG_NOTICE },

    { "panic",   LOG_EMERG },

    { "warning", LOG_WARNING },

    { "warn",    LOG_WARNING },

    { NULL, -1 }

  };

#endif

static int do_syslog = 0;

static int loglevel  = LOG_NOTICE;

int mdnsd_log_level(char *level)

{

  int lvl = -1;

  for (int i = 0; prioritynames[i].c_name; i++) {

    size_t len = MAX(strlen(prioritynames[i].c_name),

         strlen(level));

    if (!strncasecmp(prioritynames[i].c_name, level, len)) {

      lvl = prioritynames[i].c_val;

      break;

    }

  }

  if (-1 == lvl)

    lvl = atoi(level);

  if (lvl >= 0)

    loglevel = lvl;

  if (do_syslog)

    setlogmask(LOG_UPTO(loglevel));

  return lvl;

}

void mdnsd_log_open(const char *ident)

{

  openlog(ident, LOG_PID | LOG_NDELAY, LOG_DAEMON);

  setlogmask(LOG_UPTO(loglevel));

  do_syslog = 1;

}

void mdnsd_log_hex(const char *msg, unsigned char *buffer, ssize_t len)

{

  char ascii[17];

  int i;

  if (do_syslog)

    return;

  if (loglevel < LOG_DEBUG)

    return;

  printf("%s", msg);

  memset(ascii, 0, sizeof(ascii));

  for (i = 0; i < len; i++) {

    if (i % 16 == 0)

      printf("%s\n%06x ", ascii, i);

    printf("%02X ", buffer[i]);

    if (isprint((int)(buffer[i])))

      ascii[i%16] = buffer[i];

    else

      ascii[i%16] = '.';

  }

  ascii[i % 16] = 0;

  while (i % 16) {

    printf("   ");

    i++;

  }

  printf("%s\n", ascii);

  printf("\n");

}

void mdnsd_log(int severity, const char *fmt, ...)

{

  FILE *file;

        va_list args;

  if (loglevel == INTERNAL_NOPRI)

    return;

  if (severity > LOG_WARNING)

    file = stdout;

  else

    file = stderr;

        va_start(args, fmt);

  if (do_syslog)

    vsyslog(severity, fmt, args);

  else if (severity <= loglevel) {

    vfprintf(file, fmt, args);

    fprintf(file, "\n");

    fflush(file);

  }

        va_end(args);

}

void mdnsd_log_time(struct timeval *tv, char *buf, size_t len)

{

  char tmp[15];

  time_t t;

  struct tm *tm;

  if (loglevel < LOG_DEBUG)

    return;

  t = tv->tv_sec;

  tm = localtime(&t);

  tm->tm_sec += tv->tv_usec / 1000000;

  if (buf && len > 8) {

    strftime(buf, len, "%H:%M:%S", tm);

    return;

  }

  strftime(tmp, sizeof(tmp), "%H:%M:%S", tm);

  mdnsd_log(LOG_DEBUG, "@%s", tmp);

}