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>
29 #include <sys/utsname.h>
33 /* xtables interface */
34 #if (XTABLES_VERSION_CODE == 10)
35 # include "xtables-10.h"
36 #elif (XTABLES_VERSION_CODE == 5)
37 # include "xtables-5.h"
39 # error "Unsupported xtables version"
42 /* libext.a interface */
43 #define FW3_IPT_MODULES \
44 __ipt_module(comment) \
45 __ipt_module(conntrack) \
49 __ipt_module(connlimit) \
53 __ipt_module(standard) \
61 __ipt_module(MASQUERADE) \
62 __ipt_module(REDIRECT) \
63 __ipt_module(REJECT) \
70 #define __ipt_module(x) \
71 extern void libxt_##x##_init(void) __attribute__((weak)); \
72 extern void libipt_##x##_init(void) __attribute__((weak));
75 #define __ipt_module(x) \
76 extern void libxt_##x##_init(void) __attribute__((weak)); \
77 extern void libipt_##x##_init(void) __attribute__((weak)); \
78 extern void libip6t_##x##_init(void) __attribute__((weak));
84 /* Required by certain extensions like SNAT and DNAT */
85 extern int kernel_version;
86 void get_kernel_version(void);
88 struct fw3_ipt_handle {
89 enum fw3_family family;
98 struct fw3_ipt_handle *h;
102 struct ip6t_entry e6;
105 struct xtables_rule_match *matches;
106 struct xtables_target *target;
112 bool protocol_loaded;
115 struct fw3_ipt_handle *fw3_ipt_open(enum fw3_family family,
116 enum fw3_table table);
118 void fw3_ipt_set_policy(struct fw3_ipt_handle *h, const char *chain,
119 enum fw3_flag policy);
122 void fw3_ipt_flush_chain(struct fw3_ipt_handle *h, const char *chain);
123 void fw3_ipt_delete_chain(struct fw3_ipt_handle *h, const char *chain);
125 void fw3_ipt_create_chain(struct fw3_ipt_handle *h, const char *fmt, ...);
127 void fw3_ipt_flush(struct fw3_ipt_handle *h);
129 void fw3_ipt_commit(struct fw3_ipt_handle *h);
131 void fw3_ipt_close(struct fw3_ipt_handle *h);
133 struct fw3_ipt_rule *fw3_ipt_rule_new(struct fw3_ipt_handle *h);
135 void fw3_ipt_rule_proto(struct fw3_ipt_rule *r, struct fw3_protocol *proto);
137 void fw3_ipt_rule_in_out(struct fw3_ipt_rule *r,
138 struct fw3_device *in, struct fw3_device *out);
140 void fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
141 struct fw3_address *src, struct fw3_address *dest);
143 void fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
144 struct fw3_port *sp, struct fw3_port *dp);
146 void fw3_ipt_rule_device(struct fw3_ipt_rule *r, const char *device, bool out);
148 void fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac);
150 void fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp);
152 void fw3_ipt_rule_limit(struct fw3_ipt_rule *r, struct fw3_limit *limit);
154 void fw3_ipt_rule_ipset(struct fw3_ipt_rule *r, struct fw3_setmatch *match);
156 void fw3_ipt_rule_time(struct fw3_ipt_rule *r, struct fw3_time *time);
158 void fw3_ipt_rule_mark(struct fw3_ipt_rule *r, struct fw3_mark *mark);
160 void fw3_ipt_rule_comment(struct fw3_ipt_rule *r, const char *fmt, ...);
162 void fw3_ipt_rule_extra(struct fw3_ipt_rule *r, const char *extra);
164 void fw3_ipt_rule_addarg(struct fw3_ipt_rule *r, bool inv,
165 const char *k, const char *v);
167 struct fw3_ipt_rule * fw3_ipt_rule_create(struct fw3_ipt_handle *handle,
168 struct fw3_protocol *proto,
169 struct fw3_device *in,
170 struct fw3_device *out,
171 struct fw3_address *src,
172 struct fw3_address *dest);
174 void __fw3_ipt_rule_append(struct fw3_ipt_rule *r, bool repl,
175 const char *fmt, ...);
177 #define fw3_ipt_rule_append(rule, ...) \
178 __fw3_ipt_rule_append(rule, false, __VA_ARGS__)
180 #define fw3_ipt_rule_replace(rule, ...) \
181 __fw3_ipt_rule_append(rule, true, __VA_ARGS__)
184 fw3_ipt_rule_target(struct fw3_ipt_rule *r, const char *fmt, ...)
190 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
193 fw3_ipt_rule_addarg(r, false, "-j", buf);