xtables-5.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_XTABLES_5_H
  20 #define __FW3_XTABLES_5_H
  21
  22 static inline const char *
  23 fw3_xt_get_match_name(struct xtables_match *m)
  24 {
  25     return m->m->u.user.name;
  26 }
  27
  28 static inline void
  29 fw3_xt_set_match_name(struct xtables_match *m)
  30 {
  31     strcpy(m->m->u.user.name, m->name);
  32 }
  33
  34 static inline bool
  35 fw3_xt_has_match_parse(struct xtables_match *m)
  36 {
  37     return !!m->parse;
  38 }
  39
  40 static inline void
  41 fw3_xt_free_match_udata(struct xtables_match *m)
  42 {
  43     return;
  44 }
  45
  46 static inline void
  47 fw3_xt_merge_match_options(struct xtables_globals *g, struct xtables_match *m)
  48 {
  49         g->opts = xtables_merge_options(g->opts, m->extra_opts, &m->option_offset);
  50 }
  51
  52
  53 static inline const char *
  54 fw3_xt_get_target_name(struct xtables_target *t)
  55 {
  56     return t->t->u.user.name;
  57 }
  58
  59 static inline void
  60 fw3_xt_set_target_name(struct xtables_target *t, const char *name)
  61 {
  62     strcpy(t->t->u.user.name, name);
  63 }
  64
  65 static inline bool
  66 fw3_xt_has_target_parse(struct xtables_target *t)
  67 {
  68     return !!t->parse;
  69 }
  70
  71 static inline void
  72 fw3_xt_free_target_udata(struct xtables_target *t)
  73 {
  74     return;
  75 }
  76
  77 static inline void
  78 fw3_xt_merge_target_options(struct xtables_globals *g, struct xtables_target *t)
  79 {
  80         g->opts = xtables_merge_options(g->opts, t->extra_opts, &t->option_offset);
  81 }
  82
  83
  84 /* xtables api addons */
  85
  86 static inline void
  87 xtables_option_mpcall(unsigned int c, char **argv, bool invert,
  88                       struct xtables_match *m, void *fw)
  89 {
  90         if (m->parse)
  91                 m->parse(c - m->option_offset, argv, invert, &m->mflags, fw, &m->m);
  92 }
  93
  94 static inline void
  95 xtables_option_mfcall(struct xtables_match *m)
  96 {
  97         if (m->final_check)
  98                 m->final_check(m->mflags);
  99 }
 100
 101 static inline void
 102 xtables_option_tpcall(unsigned int c, char **argv, bool invert,
 103                       struct xtables_target *t, void *fw)
 104 {
 105         if (t->parse)
 106                 t->parse(c - t->option_offset, argv, invert, &t->tflags, fw, &t->t);
 107 }
 108
 109 static inline void
 110 xtables_option_tfcall(struct xtables_target *t)
 111 {
 112         if (t->final_check)
 113                 t->final_check(t->tflags);
 114 }
 115
 116 static inline void
 117 xtables_rule_matches_free(struct xtables_rule_match **matches)
 118 {
 119         struct xtables_rule_match *mp, *tmp;
 120
 121         for (mp = *matches; mp;)
 122         {
 123                 tmp = mp->next;
 124
 125                 if (mp->match->m)
 126                 {
 127                         free(mp->match->m);
 128                         mp->match->m = NULL;
 129                 }
 130
 131                 if (mp->match == mp->match->next)
 132                 {
 133                         free(mp->match);
 134                         mp->match = NULL;
 135                 }
 136
 137                 free(mp);
 138                 mp = tmp;
 139         }
 140
 141         *matches = NULL;
 142 }
 143
 144 static inline int
 145 xtables_ipmask_to_cidr(const struct in_addr *mask)
 146 {
 147         int bits;
 148         uint32_t m;
 149
 150         for (m = ntohl(mask->s_addr), bits = 0; m & 0x80000000; m <<= 1)
 151                 bits++;
 152
 153         return bits;
 154 }
 155
 156 static inline int
 157 xtables_ip6mask_to_cidr(const struct in6_addr *mask)
 158 {
 159         int bits = 0;
 160         uint32_t a, b, c, d;
 161
 162         a = ntohl(mask->s6_addr32[0]);
 163         b = ntohl(mask->s6_addr32[1]);
 164         c = ntohl(mask->s6_addr32[2]);
 165         d = ntohl(mask->s6_addr32[3]);
 166
 167         while (a & 0x80000000U)
 168         {
 169                 a <<= 1;
 170                 a  |= (b >> 31) & 1;
 171                 b <<= 1;
 172                 b  |= (c >> 31) & 1;
 173                 c <<= 1;
 174                 c  |= (d >> 31) & 1;
 175                 d <<= 1;
 176
 177                 bits++;
 178         }
 179
 180         return bits;
 181 }
 182
 183 #endif