contrib/fwd/src/fwd_utils.h

   1 /*
   2  * fwd - OpenWrt firewall daemon - commmon utility header
   3  *
   4  *   Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
   5  *
   6  * The fwd program is free software: you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version 2
   8  * as published by the Free Software Foundation.
   9  *
  10  * The fwd program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with the fwd program. If not, see http://www.gnu.org/licenses/.
  17  */
  18
  19 #ifndef __FWD_UTILS_H__
  20 #define __FWD_UTILS_H__
  21
  22 #include <syslog.h>
  23
  24 #include "fwd.h"
  25
  26 void fwd_log_init(void);
  27 void __fwd_log(int, const char *, ...);
  28 #define fwd_log_info(...) __fwd_log(LOG_INFO, __VA_ARGS__)
  29 #define fwd_log_err(...) __fwd_log(LOG_ERR, __VA_ARGS__)
  30
  31 int fwd_empty_cidr(struct fwd_cidr *);
  32 int fwd_equal_cidr(struct fwd_cidr *, struct fwd_cidr *);
  33 void fwd_update_cidr(struct fwd_cidr *, struct fwd_cidr *);
  34
  35 /* fwd_zmalloc(size_t)
  36  * Allocates a zeroed buffer of the given size. */
  37 void * fwd_zmalloc(size_t);
  38
  39 /* fwd_alloc_ptr(type)
  40  * Allocates a buffer with the size of the given datatype
  41  * and returns a pointer to it. */
  42 #define fwd_alloc_ptr(t) (t *) fwd_zmalloc(sizeof(t))
  43
  44 /* fwd_free_ptr(void *)
  45  * Frees the given pointer and sets it to NULL.
  46  * Safe for NULL values. */
  47 #define fwd_free_ptr(x) do { if(x != NULL) free(x); x = NULL; } while(0)
  48
  49 #endif
  50