util.h

   1 /*
   2  * Copyright (C) 2014 John Crispin <blogic@openwrt.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU Lesser General Public License version 2.1
   6  * as published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #ifndef _UTIL_H__
  15 #define _UTIL_H__
  16
  17 #include <stdint.h>
  18 #include <time.h>
  19
  20 #define DBG(level, fmt, ...) do { \
  21         umdns_udebug_printf("[%d] [%s:%d] " fmt, level, __func__, __LINE__, ## __VA_ARGS__); \
  22         if (debug >= level) \
  23                 fprintf(stderr, "mdnsd: %s (%d): " fmt, __func__, __LINE__, ## __VA_ARGS__); \
  24         } while (0)
  25
  26 #define MDNS_BUF_LEN    (8 * 1024)
  27 #define HOSTNAME_LEN    256
  28
  29 extern int debug;
  30 extern uint8_t mdns_buf[MDNS_BUF_LEN];
  31
  32 /**
  33  * The first label of a host's fully qualified domain name
  34  *
  35  * E.g. just "example" for the domain name example.local.
  36  */
  37 extern char umdns_host_label[HOSTNAME_LEN];
  38
  39 extern char mdns_hostname_local[HOSTNAME_LEN + 6];
  40
  41 extern void get_hostname(void);
  42 extern uint32_t rand_time_delta(uint32_t t);
  43 extern time_t monotonic_time(void);
  44
  45 void umdns_udebug_set_enabled(bool val);
  46 void umdns_udebug_printf(const char *format, ...);
  47
  48 #endif