utils.h

   1 /*
   2  * firewall3 - 3rd OpenWrt UCI firewall implementation
   3  *
   4  *   Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #ifndef __FW3_UTILS_H
  20 #define __FW3_UTILS_H
  21
  22 #include <stdlib.h>
  23 #include <stdbool.h>
  24 #include <unistd.h>
  25 #include <signal.h>
  26 #include <fcntl.h>
  27 #include <sys/stat.h>
  28 #include <sys/wait.h>
  29 #include <sys/file.h>
  30
  31 #include <libubox/list.h>
  32 #include <uci.h>
  33
  34
  35 #define FW3_STATEFILE   "/var/run/fw3.state"
  36 #define FW3_LOCKFILE    "/var/run/fw3.lock"
  37
  38 void warn_elem(struct uci_element *e, const char *format, ...);
  39 void warn(const char *format, ...);
  40 void error(const char *format, ...);
  41 void info(const char *format, ...);
  42
  43 #define fw3_foreach(p, h)                                                  \
  44         for (p = list_empty(h) ? NULL : list_first_entry(h, typeof(*p), list); \
  45          list_empty(h) ? (p == NULL) : (&p->list != (h));                  \
  46              p = list_empty(h) ? list_first_entry(h, typeof(*p), list)         \
  47                            : list_entry(p->list.next, typeof(*p), list))
  48
  49 static inline void
  50 fw3_free_list(struct list_head *list)
  51 {
  52         struct list_head *cur, *tmp;
  53
  54         list_for_each_safe(cur, tmp, list)
  55         {
  56                 list_del(cur);
  57                 free(cur);
  58         }
  59 }
  60
  61 #define fw3_is_family(p, f)                                                \
  62         (!p || p->family == FW3_FAMILY_ANY || p->family == f)
  63
  64 const char * fw3_find_command(const char *cmd);
  65
  66 bool fw3_stdout_pipe(void);
  67 bool __fw3_command_pipe(bool silent, const char *command, ...);
  68 #define fw3_command_pipe(...) __fw3_command_pipe(__VA_ARGS__, NULL)
  69
  70 void fw3_command_close(void);
  71 void fw3_pr(const char *fmt, ...);
  72
  73 bool fw3_has_table(bool ipv6, const char *table);
  74
  75 bool fw3_lock(void);
  76 void fw3_unlock(void);
  77
  78 bool fw3_has_state(void);
  79 void fw3_write_state(void *state);
  80 void fw3_remove_state(void);
  81
  82 #endif