2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
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.
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.
19 #ifndef __FW3_IPTABLES_H
20 #define __FW3_IPTABLES_H
22 #include <libiptc/libiptc.h>
23 #include <libiptc/libip6tc.h>
28 #include <sys/utsname.h>
32 /* xtables interface */
33 #if (XTABLES_VERSION_CODE == 10)
34 # include "xtables-10.h"
35 #elif (XTABLES_VERSION_CODE == 5)
36 # include "xtables-5.h"
38 # error "Unsupported xtables version"
41 /* libext.a interface */
42 #define FW3_IPT_MODULES \
43 __ipt_module(comment) \
44 __ipt_module(conntrack) \
51 __ipt_module(standard) \
59 __ipt_module(MASQUERADE) \
60 __ipt_module(REDIRECT) \
61 __ipt_module(REJECT) \
67 #define __ipt_module(x) \
68 extern void libxt_##x##_init(void) __attribute__((weak)); \
69 extern void libipt_##x##_init(void) __attribute__((weak)); \
70 extern void libip6t_##x##_init(void) __attribute__((weak));
75 /* Required by certain extensions like SNAT and DNAT */
76 extern int kernel_version;
77 void get_kernel_version(void);
79 struct fw3_ipt_handle {
80 enum fw3_family family;
86 struct fw3_ipt_handle *h;
93 struct xtables_rule_match *matches;
94 struct xtables_target *target;
100 bool protocol_loaded;
103 struct fw3_ipt_handle *fw3_ipt_open(enum fw3_family family,
104 enum fw3_table table);
106 void fw3_ipt_set_policy(struct fw3_ipt_handle *h, const char *chain,
107 enum fw3_flag policy);
109 void fw3_ipt_delete_chain(struct fw3_ipt_handle *h, const char *chain);
110 void fw3_ipt_delete_rules(struct fw3_ipt_handle *h, const char *target);
112 void fw3_ipt_create_chain(struct fw3_ipt_handle *h, const char *fmt, ...);
114 void fw3_ipt_flush(struct fw3_ipt_handle *h);
116 void fw3_ipt_commit(struct fw3_ipt_handle *h);
118 struct fw3_ipt_rule *fw3_ipt_rule_new(struct fw3_ipt_handle *h);
120 void fw3_ipt_rule_proto(struct fw3_ipt_rule *r, struct fw3_protocol *proto);
122 void fw3_ipt_rule_in_out(struct fw3_ipt_rule *r,
123 struct fw3_device *in, struct fw3_device *out);
125 void fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
126 struct fw3_address *src, struct fw3_address *dest);
128 void fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
129 struct fw3_port *sp, struct fw3_port *dp);
131 void fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac);
133 void fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp);
135 void fw3_ipt_rule_limit(struct fw3_ipt_rule *r, struct fw3_limit *limit);
137 void fw3_ipt_rule_ipset(struct fw3_ipt_rule *r, struct fw3_ipset *ipset,
140 void fw3_ipt_rule_time(struct fw3_ipt_rule *r, struct fw3_time *time);
142 void fw3_ipt_rule_mark(struct fw3_ipt_rule *r, struct fw3_mark *mark);
144 void fw3_ipt_rule_comment(struct fw3_ipt_rule *r, const char *fmt, ...);
146 void fw3_ipt_rule_extra(struct fw3_ipt_rule *r, const char *extra);
148 void fw3_ipt_rule_addarg(struct fw3_ipt_rule *r, bool inv,
149 const char *k, const char *v);
151 struct fw3_ipt_rule * fw3_ipt_rule_create(struct fw3_ipt_handle *handle,
152 struct fw3_protocol *proto,
153 struct fw3_device *in,
154 struct fw3_device *out,
155 struct fw3_address *src,
156 struct fw3_address *dest);
158 void fw3_ipt_rule_append(struct fw3_ipt_rule *r, const char *fmt, ...);
161 fw3_ipt_rule_target(struct fw3_ipt_rule *r, const char *fmt, ...)
167 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
170 fw3_ipt_rule_addarg(r, false, "-j", buf);