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 = calloc(1, sizeof(*forward));
55 forward->enabled = true;
57 fw3_parse_options(forward, fw3_forward_opts, s);
59 if (!forward->enabled)
61 fw3_free_forward(forward);
65 if (forward->src.invert || forward->dest.invert)
67 warn_elem(e, "must not have inverted 'src' or 'dest' options");
68 fw3_free_forward(forward);
71 else if (forward->src.set && !forward->src.any &&
72 !(forward->_src = fw3_lookup_zone(state, forward->src.name)))
74 warn_elem(e, "refers to not existing zone '%s'", forward->src.name);
75 fw3_free_forward(forward);
78 else if (forward->dest.set && !forward->dest.any &&
79 !(forward->_dest = fw3_lookup_zone(state, forward->dest.name)))
81 warn_elem(e, "refers to not existing zone '%s'", forward->dest.name);
82 fw3_free_forward(forward);
86 /* NB: forward family... */
89 setbit(forward->_dest->flags[0], FW3_FLAG_ACCEPT);
90 setbit(forward->_dest->flags[1], FW3_FLAG_ACCEPT);
93 (forward->_src->conntrack || forward->_dest->conntrack))
95 forward->_src->conntrack = forward->_dest->conntrack = true;
99 list_add_tail(&forward->list, &state->forwards);
106 append_chain(struct fw3_ipt_rule *r, struct fw3_forward *forward)
108 if (forward->src.any || !forward->src.set)
109 fw3_ipt_rule_append(r, "delegate_forward");
111 fw3_ipt_rule_append(r, "zone_%s_forward", forward->src.name);
114 static void set_target(struct fw3_ipt_rule *r, struct fw3_forward *forward)
116 if (forward->dest.any || !forward->dest.set)
117 fw3_ipt_rule_target(r, "ACCEPT");
119 fw3_ipt_rule_target(r, "zone_%s_dest_ACCEPT", forward->dest.name);
123 print_forward(struct fw3_ipt_handle *handle, struct fw3_forward *forward)
126 struct fw3_ipt_rule *r;
128 if (handle->table != FW3_TABLE_FILTER)
131 if (!fw3_is_family(forward, handle->family))
134 s = forward->_src ? forward->_src->name : "*";
135 d = forward->_dest ? forward->_dest->name : "*";
137 info(" * Forward '%s' -> '%s'", s, d);
139 if (!fw3_is_family(forward->_src, handle->family) ||
140 !fw3_is_family(forward->_dest, handle->family))
142 info(" ! Skipping due to different family of zone");
146 r = fw3_ipt_rule_new(handle);
147 fw3_ipt_rule_comment(r, "forwarding %s -> %s", s, d);
148 set_target(r, forward);
149 append_chain(r, forward);
153 fw3_print_forwards(struct fw3_ipt_handle *handle, struct fw3_state *state)
155 struct fw3_forward *forward;
157 list_for_each_entry(forward, &state->forwards, list)
158 print_forward(handle, forward);