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) \
52 __ipt_module(standard) \
60 __ipt_module(MASQUERADE) \
61 __ipt_module(REDIRECT) \
62 __ipt_module(REJECT) \
69 #define __ipt_module(x) \
70 extern void libxt_##x##_init(void) __attribute__((weak)); \
71 extern void libipt_##x##_init(void) __attribute__((weak));
74 #define __ipt_module(x) \
75 extern void libxt_##x##_init(void) __attribute__((weak)); \
76 extern void libipt_##x##_init(void) __attribute__((weak)); \
77 extern void libip6t_##x##_init(void) __attribute__((weak));
83 /* Required by certain extensions like SNAT and DNAT */
84 extern int kernel_version
;
85 void get_kernel_version(void);
87 struct fw3_ipt_handle
{
88 enum fw3_family family
;
97 struct fw3_ipt_handle
*h
;
101 struct ip6t_entry e6
;
104 struct xtables_rule_match
*matches
;
105 struct xtables_target
*target
;
111 bool protocol_loaded
;
114 struct fw3_ipt_handle
*fw3_ipt_open(enum fw3_family family
,
115 enum fw3_table table
);
117 void fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
118 enum fw3_flag policy
);
121 void fw3_ipt_flush_chain(struct fw3_ipt_handle
*h
, const char *chain
);
122 void fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
);
124 void fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...);
126 void fw3_ipt_flush(struct fw3_ipt_handle
*h
);
128 void fw3_ipt_commit(struct fw3_ipt_handle
*h
);
130 void fw3_ipt_close(struct fw3_ipt_handle
*h
);
132 struct fw3_ipt_rule
*fw3_ipt_rule_new(struct fw3_ipt_handle
*h
);
134 void fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
);
136 void fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
137 struct fw3_device
*in
, struct fw3_device
*out
);
139 void fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
140 struct fw3_address
*src
, struct fw3_address
*dest
);
142 void fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
143 struct fw3_port
*sp
, struct fw3_port
*dp
);
145 void fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
);
147 void fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
);
149 void fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
);
151 void fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_setmatch
*match
);
153 void fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
);
155 void fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
);
157 void fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...);
159 void fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
);
161 void fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
162 const char *k
, const char *v
);
164 struct fw3_ipt_rule
* fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
,
165 struct fw3_protocol
*proto
,
166 struct fw3_device
*in
,
167 struct fw3_device
*out
,
168 struct fw3_address
*src
,
169 struct fw3_address
*dest
);
171 void __fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, bool repl
,
172 const char *fmt
, ...);
174 #define fw3_ipt_rule_append(rule, ...) \
175 __fw3_ipt_rule_append(rule, false, __VA_ARGS__)
177 #define fw3_ipt_rule_replace(rule, ...) \
178 __fw3_ipt_rule_append(rule, true, __VA_ARGS__)
181 fw3_ipt_rule_target(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
187 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
190 fw3_ipt_rule_addarg(r
, false, "-j", buf
);