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("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),
36 fw3_load_forwards(struct fw3_state *state, struct uci_package *p)
38 struct uci_section *s;
39 struct uci_element *e;
40 struct fw3_forward *forward;
42 INIT_LIST_HEAD(&state->forwards);
44 uci_foreach_element(&p->sections, e)
46 s = uci_to_section(e);
48 if (strcmp(s->type, "forwarding"))
51 forward = malloc(sizeof(*forward));
56 memset(forward, 0, sizeof(*forward));
58 forward->enabled = true;
60 fw3_parse_options(forward, fw3_forward_opts, s);
62 if (!forward->enabled)
64 fw3_free_forward(forward);
68 if (forward->src.invert || forward->dest.invert)
70 warn_elem(e, "must not have inverted 'src' or 'dest' options");
71 fw3_free_forward(forward);
74 else if (forward->src.set && !forward->src.any &&
75 !(forward->_src = fw3_lookup_zone(state, forward->src.name, false)))
77 warn_elem(e, "refers to not existing zone '%s'", forward->src.name);
78 fw3_free_forward(forward);
81 else if (forward->dest.set && !forward->dest.any &&
82 !(forward->_dest = fw3_lookup_zone(state, forward->dest.name, false)))
84 warn_elem(e, "refers to not existing zone '%s'", forward->dest.name);
85 fw3_free_forward(forward);
89 /* NB: forward family... */
92 setbit(forward->_dest->flags[0], FW3_TARGET_ACCEPT);
93 setbit(forward->_dest->flags[1], FW3_TARGET_ACCEPT);
96 (forward->_src->conntrack || forward->_dest->conntrack))
98 forward->_src->conntrack = forward->_dest->conntrack = true;
102 list_add_tail(&forward->list, &state->forwards);
109 print_chain(struct fw3_forward *forward)
111 if (forward->src.any || !forward->src.set)
112 fw3_pr("-A delegate_forward");
114 fw3_pr("-A zone_%s_forward", forward->src.name);
117 static void print_target(struct fw3_forward *forward)
119 if (forward->dest.any || !forward->dest.set)
120 fw3_pr(" -j ACCEPT\n");
122 fw3_pr(" -j zone_%s_dest_ACCEPT\n", forward->dest.name);
126 print_forward(enum fw3_table table, enum fw3_family family,
127 struct fw3_forward *forward)
131 if (table != FW3_TABLE_FILTER)
134 if (!fw3_is_family(forward, family))
137 s = forward->_src ? forward->_src->name : "*";
138 d = forward->_dest ? forward->_dest->name : "*";
140 info(" * Forward '%s' -> '%s'", s, d);
142 if (!fw3_is_family(forward->_src, family) ||
143 !fw3_is_family(forward->_dest, family))
145 info(" ! Skipping due to different family of zone");
149 print_chain(forward);
150 fw3_format_comment("forwarding ", s, "->", d);
151 print_target(forward);
155 fw3_print_forwards(enum fw3_table table, enum fw3_family family,
156 struct fw3_state *state)
158 struct fw3_forward *forward;
160 list_for_each_entry(forward, &state->forwards, list)
161 print_forward(table, family, forward);