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.
22 const struct fw3_option fw3_forward_opts
[] = {
23 FW3_OPT("name", string
, forward
, name
),
24 FW3_OPT("family", family
, forward
, family
),
26 FW3_OPT("src", device
, forward
, src
),
27 FW3_OPT("dest", device
, forward
, dest
),
34 fw3_load_forwards(struct fw3_state
*state
, struct uci_package
*p
)
36 struct uci_section
*s
;
37 struct uci_element
*e
;
38 struct fw3_forward
*forward
;
40 INIT_LIST_HEAD(&state
->forwards
);
42 uci_foreach_element(&p
->sections
, e
)
44 s
= uci_to_section(e
);
46 if (strcmp(s
->type
, "forwarding"))
49 forward
= malloc(sizeof(*forward
));
54 memset(forward
, 0, sizeof(*forward
));
56 fw3_parse_options(forward
, fw3_forward_opts
, s
);
58 if (forward
->src
.invert
|| forward
->dest
.invert
)
60 warn_elem(e
, "must not have inverted 'src' or 'dest' options");
61 fw3_free_forward(forward
);
64 else if (forward
->src
.set
&& !forward
->src
.any
&&
65 !(forward
->_src
= fw3_lookup_zone(state
, forward
->src
.name
, false)))
67 warn_elem(e
, "refers to not existing zone '%s'", forward
->src
.name
);
68 fw3_free_forward(forward
);
71 else if (forward
->dest
.set
&& !forward
->dest
.any
&&
72 !(forward
->_dest
= fw3_lookup_zone(state
, forward
->dest
.name
, false)))
74 warn_elem(e
, "refers to not existing zone '%s'", forward
->dest
.name
);
75 fw3_free_forward(forward
);
81 setbit(forward
->_dest
->dst_flags
, FW3_TARGET_ACCEPT
);
84 (forward
->_src
->conntrack
|| forward
->_dest
->conntrack
))
86 forward
->_src
->conntrack
= forward
->_dest
->conntrack
= true;
90 list_add_tail(&forward
->list
, &state
->forwards
);
97 print_chain(struct fw3_forward
*forward
)
99 if (forward
->src
.any
|| !forward
->src
.set
)
100 fw3_pr("-A delegate_forward");
102 fw3_pr("-A zone_%s_forward", forward
->src
.name
);
105 static void print_target(struct fw3_forward
*forward
)
107 if (forward
->dest
.any
|| !forward
->dest
.set
)
108 fw3_pr(" -j ACCEPT\n");
110 fw3_pr(" -j zone_%s_dest_ACCEPT\n", forward
->dest
.name
);
114 print_forward(enum fw3_table table
, enum fw3_family family
,
115 struct fw3_forward
*forward
)
119 if (table
!= FW3_TABLE_FILTER
)
122 if (!fw3_is_family(forward
, family
))
125 s
= forward
->_src
? forward
->_src
->name
: "*";
126 d
= forward
->_dest
? forward
->_dest
->name
: "*";
129 info(" * Forward '%s'", forward
->name
);
131 info(" * Forward %s->%s", s
, d
);
133 if (!fw3_is_family(forward
->_src
, family
) ||
134 !fw3_is_family(forward
->_dest
, family
))
136 info(" ! Skipping due to different family of zone");
140 print_chain(forward
);
141 fw3_format_comment("forwarding ", s
, "->", d
);
142 print_target(forward
);
146 fw3_print_forwards(enum fw3_table table
, enum fw3_family family
,
147 struct fw3_state
*state
)
149 struct fw3_forward
*forward
;
151 list_for_each_entry(forward
, &state
->forwards
, list
)
152 print_forward(table
, family
, forward
);