iptables.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_IPTABLES_H
  20 #define __FW3_IPTABLES_H
  21
  22 #include <libiptc/libiptc.h>
  23 #include <libiptc/libip6tc.h>
  24 #include <xtables.h>
  25
  26 #include <unistd.h>
  27 #include <getopt.h>
  28 #include <sys/utsname.h>
  29
  30 #include "options.h"
  31
  32
  33 extern struct xtables_match *xtables_pending_matches;
  34 extern struct xtables_target *xtables_pending_targets;
  35
  36 /* libext.a interface */
  37 void libip6t_icmp6_init(void);
  38 void libip6t_LOG_init(void);
  39 void libip6t_REJECT_init(void);
  40 void libipt_DNAT_init(void);
  41 void libipt_icmp_init(void);
  42 void libipt_LOG_init(void);
  43 void libipt_MASQUERADE_init(void);
  44 void libipt_REDIRECT_init(void);
  45 void libipt_REJECT_init(void);
  46 void libipt_SNAT_init(void);
  47 void libxt_comment_init(void);
  48 void libxt_conntrack_init(void);
  49 void libxt_CT_init(void);
  50 void libxt_limit_init(void);
  51 void libxt_mac_init(void);
  52 void libxt_mark_init(void);
  53 void libxt_MARK_init(void);
  54 void libxt_set_init(void);
  55 void libxt_SET_init(void);
  56 void libxt_standard_init(void);
  57 void libxt_TCPMSS_init(void);
  58 void libxt_tcp_init(void);
  59 void libxt_time_init(void);
  60 void libxt_udp_init(void);
  61
  62 /* Required by certain extensions like SNAT and DNAT */
  63 extern int kernel_version;
  64 void get_kernel_version(void);
  65
  66 struct fw3_ipt_handle {
  67         enum fw3_family family;
  68         enum fw3_table table;
  69         struct xtc_handle *handle;
  70 };
  71
  72 struct fw3_ipt_rule {
  73         struct fw3_ipt_handle *h;
  74
  75         union {
  76                 struct ipt_entry e;
  77                 struct ip6t_entry e6;
  78         };
  79
  80         struct xtables_rule_match *matches;
  81         struct xtables_target *target;
  82
  83         int argc;
  84         char **argv;
  85
  86         uint32_t protocol;
  87         bool protocol_loaded;
  88 };
  89
  90 struct fw3_ipt_handle *fw3_ipt_open(enum fw3_family family,
  91                                     enum fw3_table table);
  92
  93 void fw3_ipt_set_policy(struct fw3_ipt_handle *h, const char *chain,
  94                         enum fw3_flag policy);
  95
  96 void fw3_ipt_delete_chain(struct fw3_ipt_handle *h, const char *chain);
  97 void fw3_ipt_delete_rules(struct fw3_ipt_handle *h, const char *target);
  98
  99 void fw3_ipt_create_chain(struct fw3_ipt_handle *h, const char *fmt, ...);
 100
 101 void fw3_ipt_flush(struct fw3_ipt_handle *h);
 102
 103 void fw3_ipt_commit(struct fw3_ipt_handle *h);
 104
 105 struct fw3_ipt_rule *fw3_ipt_rule_new(struct fw3_ipt_handle *h);
 106
 107 void fw3_ipt_rule_proto(struct fw3_ipt_rule *r, struct fw3_protocol *proto);
 108
 109 void fw3_ipt_rule_in_out(struct fw3_ipt_rule *r,
 110                          struct fw3_device *in, struct fw3_device *out);
 111
 112 void fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
 113                            struct fw3_address *src, struct fw3_address *dest);
 114
 115 void fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
 116                               struct fw3_port *sp, struct fw3_port *dp);
 117
 118 void fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac);
 119
 120 void fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp);
 121
 122 void fw3_ipt_rule_limit(struct fw3_ipt_rule *r, struct fw3_limit *limit);
 123
 124 void fw3_ipt_rule_ipset(struct fw3_ipt_rule *r, struct fw3_ipset *ipset,
 125                         bool invert);
 126
 127 void fw3_ipt_rule_time(struct fw3_ipt_rule *r, struct fw3_time *time);
 128
 129 void fw3_ipt_rule_mark(struct fw3_ipt_rule *r, struct fw3_mark *mark);
 130
 131 void fw3_ipt_rule_comment(struct fw3_ipt_rule *r, const char *fmt, ...);
 132
 133 void fw3_ipt_rule_extra(struct fw3_ipt_rule *r, const char *extra);
 134
 135 void fw3_ipt_rule_addarg(struct fw3_ipt_rule *r, bool inv,
 136                          const char *k, const char *v);
 137
 138 struct fw3_ipt_rule * fw3_ipt_rule_create(struct fw3_ipt_handle *handle,
 139                                           struct fw3_protocol *proto,
 140                                           struct fw3_device *in,
 141                                           struct fw3_device *out,
 142                                           struct fw3_address *src,
 143                                           struct fw3_address *dest);
 144
 145 void fw3_ipt_rule_append(struct fw3_ipt_rule *r, const char *fmt, ...);
 146
 147 static inline void
 148 fw3_ipt_rule_target(struct fw3_ipt_rule *r, const char *fmt, ...)
 149 {
 150         va_list ap;
 151         char buf[32];
 152
 153         va_start(ap, fmt);
 154         vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
 155         va_end(ap);
 156
 157         fw3_ipt_rule_addarg(r, false, "-j", buf);
 158 }
 159
 160 #endif