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