2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 Jo-Philipp Wich <jo@mein.io>
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("enabled", bool, forward
, enabled
),
25 FW3_OPT("name", string
, forward
, name
),
26 FW3_OPT("family", family
, forward
, family
),
28 FW3_OPT("src", device
, forward
, src
),
29 FW3_OPT("dest", device
, forward
, dest
),
35 check_forward(struct fw3_state
*state
, struct fw3_forward
*forward
, struct uci_element
*e
)
37 if (!forward
->enabled
)
40 if (forward
->src
.invert
|| forward
->dest
.invert
)
42 warn_section("forward", forward
, e
, "must not have inverted 'src' or 'dest' options");
45 else if (forward
->src
.set
&& !forward
->src
.any
&&
46 !(forward
->_src
= fw3_lookup_zone(state
, forward
->src
.name
)))
48 warn_section("forward", forward
, e
, "refers to not existing zone '%s'",
52 else if (forward
->dest
.set
&& !forward
->dest
.any
&&
53 !(forward
->_dest
= fw3_lookup_zone(state
, forward
->dest
.name
)))
55 warn_section("forward", forward
, e
, "refers to not existing zone '%s'",
60 /* NB: forward family... */
63 fw3_setbit(forward
->_dest
->flags
[0], FW3_FLAG_ACCEPT
);
64 fw3_setbit(forward
->_dest
->flags
[1], FW3_FLAG_ACCEPT
);
70 static struct fw3_forward
*
71 fw3_alloc_forward(struct fw3_state
*state
)
73 struct fw3_forward
*forward
;
75 forward
= calloc(1, sizeof(*forward
));
79 forward
->enabled
= true;
81 list_add_tail(&forward
->list
, &state
->forwards
);
87 fw3_load_forwards(struct fw3_state
*state
, struct uci_package
*p
,
90 struct uci_section
*s
;
91 struct uci_element
*e
;
92 struct fw3_forward
*forward
;
93 struct blob_attr
*entry
;
96 INIT_LIST_HEAD(&state
->forwards
);
98 blob_for_each_attr(entry
, a
, rem
)
101 const char *name
= "ubus forward";
103 if (!fw3_attr_parse_name_type(entry
, &name
, &type
))
106 if (strcmp(type
, "forwarding"))
109 forward
= fw3_alloc_forward(state
);
113 if (!fw3_parse_blob_options(forward
, fw3_forward_opts
, entry
, name
))
115 warn_section("forward", forward
, NULL
, "skipped due to invalid options");
116 fw3_free_forward(forward
);
120 if (!check_forward(state
, forward
, NULL
))
121 fw3_free_forward(forward
);
124 uci_foreach_element(&p
->sections
, e
)
126 s
= uci_to_section(e
);
128 if (strcmp(s
->type
, "forwarding"))
131 forward
= fw3_alloc_forward(state
);
135 if (!fw3_parse_options(forward
, fw3_forward_opts
, s
))
136 warn_elem(e
, "has invalid options");
138 if (!check_forward(state
, forward
, e
))
139 fw3_free_forward(forward
);
145 append_chain(struct fw3_ipt_rule
*r
, struct fw3_forward
*forward
)
147 if (forward
->src
.any
|| !forward
->src
.set
)
148 fw3_ipt_rule_append(r
, "FORWARD");
150 fw3_ipt_rule_append(r
, "zone_%s_forward", forward
->src
.name
);
153 static void set_target(struct fw3_ipt_rule
*r
, struct fw3_forward
*forward
)
155 if (forward
->dest
.any
|| !forward
->dest
.set
)
156 fw3_ipt_rule_target(r
, "ACCEPT");
158 fw3_ipt_rule_target(r
, "zone_%s_dest_ACCEPT", forward
->dest
.name
);
162 print_forward(struct fw3_ipt_handle
*handle
, struct fw3_forward
*forward
)
165 struct fw3_ipt_rule
*r
;
167 if (handle
->table
!= FW3_TABLE_FILTER
)
170 if (!fw3_is_family(forward
, handle
->family
))
173 s
= forward
->_src
? forward
->_src
->name
: "*";
174 d
= forward
->_dest
? forward
->_dest
->name
: "*";
176 info(" * Forward '%s' -> '%s'", s
, d
);
178 if (!fw3_is_family(forward
->_src
, handle
->family
) ||
179 !fw3_is_family(forward
->_dest
, handle
->family
))
181 info(" ! Skipping due to different family of zone");
185 r
= fw3_ipt_rule_new(handle
);
186 fw3_ipt_rule_comment(r
, "Zone %s to %s forwarding policy", s
, d
);
187 set_target(r
, forward
);
188 append_chain(r
, forward
);
192 fw3_print_forwards(struct fw3_ipt_handle
*handle
, struct fw3_state
*state
)
194 struct fw3_forward
*forward
;
196 list_for_each_entry(forward
, &state
->forwards
, list
)
197 print_forward(handle
, forward
);