X-Git-Url: http://git.archive.openwrt.org/?p=project%2Ffirewall3.git;a=blobdiff_plain;f=redirects.c;h=e651dddef381375a912d4d3882e49b3ef0cdcf21;hp=15855c9ea74673af8614a7ad7c3ccdc88f1eda08;hb=0a7d36d8cf56f160b531f3db9f045e3f9315dd15;hpb=fae8e98bd4a70acd52ab92337283635ac7477c39

diff --git a/redirects.c b/redirects.c
index 15855c9..e651ddd 100644
--- a/redirects.c
+++ b/redirects.c
@@ -1,7 +1,7 @@
 /*
  * firewall3 - 3rd OpenWrt UCI firewall implementation
  *
- *   Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
+ *   Copyright (C) 2013-2014 Jo-Philipp Wich <jo@mein.io>
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -116,14 +116,11 @@ check_families(struct uci_element *e, struct fw3_redirect *r)
 static bool
 compare_addr(struct fw3_address *a, struct fw3_address *b)
 {
-	uint32_t mask;
-
-	if (a->family != FW3_FAMILY_V4)
+	if (a->family != FW3_FAMILY_V4 || b->family != FW3_FAMILY_V4)
 		return false;
 
-	mask = htonl(~((1 << (32 - a->mask)) - 1));
-
-	return ((a->address.v4.s_addr & mask) == (b->address.v4.s_addr & mask));
+	return ((a->address.v4.s_addr & a->mask.v4.s_addr) ==
+	        (b->address.v4.s_addr & a->mask.v4.s_addr));
 }
 
 static bool
@@ -139,7 +136,7 @@ resolve_dest(struct uci_element *e, struct fw3_redirect *redir,
 
 	list_for_each_entry(zone, &state->zones, list)
 	{
-		addrs = fw3_resolve_zone_addresses(zone);
+		addrs = fw3_resolve_zone_addresses(zone, NULL);
 
 		if (!addrs)
 			continue;
@@ -165,115 +162,93 @@ resolve_dest(struct uci_element *e, struct fw3_redirect *redir,
 	return false;
 }
 
-void
-fw3_load_redirects(struct fw3_state *state, struct uci_package *p)
+static bool
+check_local(struct uci_element *e, struct fw3_redirect *redir,
+            struct fw3_state *state)
 {
-	struct uci_section *s;
-	struct uci_element *e;
-	struct fw3_redirect *redir;
-
-	bool valid;
-
-	INIT_LIST_HEAD(&state->redirects);
-
-	uci_foreach_element(&p->sections, e)
-	{
-		s = uci_to_section(e);
-
-		if (strcmp(s->type, "redirect"))
-			continue;
-
-		redir = malloc(sizeof(*redir));
-
-		if (!redir)
-			continue;
-
-		memset(redir, 0, sizeof(*redir));
+	if (redir->target != FW3_FLAG_DNAT)
+		return false;
 
-		INIT_LIST_HEAD(&redir->proto);
-		INIT_LIST_HEAD(&redir->mac_src);
+	if (!redir->ip_redir.set)
+		redir->local = true;
 
-		redir->enabled = true;
-		redir->reflection = true;
+	return redir->local;
+}
 
-		valid = false;
+static bool
+check_redirect(struct fw3_state *state, struct fw3_redirect *redir, struct uci_element *e)
+{
+	bool valid;
 
-		fw3_parse_options(redir, fw3_redirect_opts, s);
+	if (!redir->enabled)
+		return false;
 
-		if (!redir->enabled)
-		{
-			fw3_free_redirect(redir);
-			continue;
-		}
+	if (redir->src.invert)
+	{
+		warn_section("redirect", redir, e, "must not have an inverted source");
+		return false;
+	}
+	else if (redir->src.set && !redir->src.any &&
+			!(redir->_src = fw3_lookup_zone(state, redir->src.name)))
+	{
+		warn_section("redirect", redir, e, "refers to not existing zone '%s'",
+				redir->src.name);
+		return false;
+	}
+	else if (redir->dest.set && !redir->dest.any &&
+			!(redir->_dest = fw3_lookup_zone(state, redir->dest.name)))
+	{
+		warn_section("redirect", redir, e, "refers to not existing zone '%s'",
+				redir->dest.name);
+		return false;
+	}
+	else if (redir->ipset.set && state->disable_ipsets)
+	{
+		warn_section("redirect", redir, e, "skipped due to disabled ipset support",
+				redir->name);
+		return false;
+	}
+	else if (redir->ipset.set &&
+			!(redir->ipset.ptr = fw3_lookup_ipset(state, redir->ipset.name)))
+	{
+		warn_section("redirect", redir, e, "refers to unknown ipset '%s'", redir->name,
+				redir->ipset.name);
+		return false;
+	}
 
-		if (redir->src.invert)
-		{
-			warn_elem(e, "must not have an inverted source");
-			fw3_free_redirect(redir);
-			continue;
-		}
-		else if (redir->src.set && !redir->src.any &&
-		         !(redir->_src = fw3_lookup_zone(state, redir->src.name)))
-		{
-			warn_elem(e, "refers to not existing zone '%s'", redir->src.name);
-			fw3_free_redirect(redir);
-			continue;
-		}
-		else if (redir->dest.set && !redir->dest.any &&
-		         !(redir->_dest = fw3_lookup_zone(state, redir->dest.name)))
-		{
-			warn_elem(e, "refers to not existing zone '%s'", redir->dest.name);
-			fw3_free_redirect(redir);
-			continue;
-		}
-		else if (redir->ipset.set && state->disable_ipsets)
-		{
-			warn_elem(e, "skipped due to disabled ipset support");
-			fw3_free_redirect(redir);
-			continue;
-		}
-		else if (redir->ipset.set &&
-		         !(redir->ipset.ptr = fw3_lookup_ipset(state, redir->ipset.name)))
-		{
-			warn_elem(e, "refers to unknown ipset '%s'", redir->ipset.name);
-			fw3_free_redirect(redir);
-			continue;
-		}
+	if (!check_families(e, redir))
+		return false;
 
-		if (!check_families(e, redir))
-		{
-			fw3_free_redirect(redir);
-			continue;
-		}
+	if (redir->target == FW3_FLAG_UNSPEC)
+	{
+		warn_section("redirect", redir, e, "has no target specified, defaulting to DNAT");
+		redir->target = FW3_FLAG_DNAT;
+	}
+	else if (redir->target < FW3_FLAG_DNAT || redir->target > FW3_FLAG_SNAT)
+	{
+		warn_section("redirect", redir, e, "has invalid target specified, defaulting to DNAT");
+		redir->target = FW3_FLAG_DNAT;
+	}
 
-		if (redir->target == FW3_FLAG_UNSPEC)
-		{
-			warn_elem(e, "has no target specified, defaulting to DNAT");
-			redir->target = FW3_FLAG_DNAT;
-		}
-		else if (redir->target < FW3_FLAG_DNAT)
-		{
-			warn_elem(e, "has invalid target specified, defaulting to DNAT");
-			redir->target = FW3_FLAG_DNAT;
-		}
+	valid = false;
 
-		if (redir->target == FW3_FLAG_DNAT)
+	if (redir->target == FW3_FLAG_DNAT)
+	{
+		if (redir->src.any)
+			warn_section("redirect", redir, e, "must not have source '*' for DNAT target");
+		else if (!redir->_src)
+			warn_section("redirect", redir, e, "has no source specified");
+		else
 		{
-			if (redir->src.any)
-				warn_elem(e, "must not have source '*' for DNAT target");
-			else if (!redir->_src)
-				warn_elem(e, "has no source specified");
-			else
-			{
-				set(redir->_src->flags, FW3_FAMILY_V4, redir->target);
-				redir->_src->conntrack = true;
-				valid = true;
-			}
+			set(redir->_src->flags, FW3_FAMILY_V4, redir->target);
+			valid = true;
 
-			if (!redir->dest.set && resolve_dest(e, redir, state))
+			if (!check_local(e, redir, state) && !redir->dest.set &&
+					resolve_dest(e, redir, state))
 			{
-				warn_elem(e, "does not specify a destination, assuming '%s'",
-				          redir->dest.name);
+				warn_section("redirect", redir, e,
+						"does not specify a destination, assuming '%s'",
+						redir->dest.name);
 			}
 
 			if (redir->reflection && redir->_dest && redir->_src->masq)
@@ -283,40 +258,118 @@ fw3_load_redirects(struct fw3_state *state, struct uci_package *p)
 				set(redir->_dest->flags, FW3_FAMILY_V4, FW3_FLAG_SNAT);
 			}
 		}
+	}
+	else
+	{
+		if (redir->dest.any)
+			warn_section("redirect", redir, e,
+					"must not have destination '*' for SNAT target");
+		else if (!redir->_dest)
+			warn_section("redirect", redir, e, "has no destination specified");
+		else if (!redir->ip_dest.set)
+			warn_section("redirect", redir, e, "has no src_dip option specified");
+		else if (!list_empty(&redir->mac_src))
+			warn_section("redirect", redir, e, "must not use 'src_mac' option for SNAT target");
 		else
 		{
-			if (redir->dest.any)
-				warn_elem(e, "must not have destination '*' for SNAT target");
-			else if (!redir->_dest)
-				warn_elem(e, "has no destination specified");
-			else if (!redir->ip_dest.set)
-				warn_elem(e, "has no src_dip option specified");
-			else if (!list_empty(&redir->mac_src))
-				warn_elem(e, "must not use 'src_mac' option for SNAT target");
-			else
-			{
-				set(redir->_dest->flags, FW3_FAMILY_V4, redir->target);
-				redir->_dest->conntrack = true;
-				valid = true;
-			}
+			set(redir->_dest->flags, FW3_FAMILY_V4, redir->target);
+			valid = true;
 		}
+	}
+
+	if (list_empty(&redir->proto))
+	{
+		warn_section("redirect", redir, e, "does not specify a protocol, assuming TCP+UDP");
+		fw3_parse_protocol(&redir->proto, "tcpudp", true);
+	}
+
+	if (!valid)
+		return false;
+
+	if (!redir->port_redir.set)
+		redir->port_redir = redir->port_dest;
 
-		if (list_empty(&redir->proto))
+	return true;
+}
+
+static struct fw3_redirect *
+fw3_alloc_redirect(struct fw3_state *state)
+{
+	struct fw3_redirect *redir;
+
+	redir = calloc(1, sizeof(*redir));
+	if (!redir)
+		return NULL;
+
+	INIT_LIST_HEAD(&redir->proto);
+	INIT_LIST_HEAD(&redir->mac_src);
+
+	redir->enabled = true;
+	redir->reflection = true;
+
+	list_add_tail(&redir->list, &state->redirects);
+
+	return redir;
+}
+
+void
+fw3_load_redirects(struct fw3_state *state, struct uci_package *p,
+		struct blob_attr *a)
+{
+	struct uci_section *s;
+	struct uci_element *e;
+	struct fw3_redirect *redir;
+	struct blob_attr *entry;
+	unsigned rem;
+
+	INIT_LIST_HEAD(&state->redirects);
+
+	blob_for_each_attr(entry, a, rem)
+	{
+		const char *type;
+		const char *name = "ubus redirect";
+
+		if (!fw3_attr_parse_name_type(entry, &name, &type))
+			continue;
+
+		if (strcmp(type, "redirect"))
+			continue;
+
+		redir = fw3_alloc_redirect(state);
+		if (!redir)
+			continue;
+
+		if (!fw3_parse_blob_options(redir, fw3_redirect_opts, entry, name))
 		{
-			warn_elem(e, "does not specify a protocol, assuming TCP+UDP");
-			fw3_parse_protocol(&redir->proto, "tcpudp", true);
+			warn_section("redirect", redir, NULL, "skipped due to invalid options");
+			fw3_free_redirect(redir);
+			continue;
 		}
 
-		if (!valid)
+		if (!check_redirect(state, redir, NULL))
+			fw3_free_redirect(redir);
+	}
+
+	uci_foreach_element(&p->sections, e)
+	{
+		s = uci_to_section(e);
+
+		if (strcmp(s->type, "redirect"))
+			continue;
+
+		redir = fw3_alloc_redirect(state);
+		if (!redir)
+			continue;
+
+		if (!fw3_parse_options(redir, fw3_redirect_opts, s))
 		{
+			warn_elem(e, "skipped due to invalid options");
 			fw3_free_redirect(redir);
 			continue;
 		}
 
-		if (!redir->port_redir.set)
-			redir->port_redir = redir->port_dest;
-
-		list_add_tail(&redir->list, &state->redirects);
+		if (!check_redirect(state, redir, e))
+			fw3_free_redirect(redir);
 	}
 }
 
@@ -330,6 +383,24 @@ append_chain_nat(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
 }
 
 static void
+set_redirect(struct fw3_ipt_rule *r, struct fw3_port *port)
+{
+	char buf[sizeof("65535-65535\0")];
+
+	fw3_ipt_rule_target(r, "REDIRECT");
+
+	if (port && port->set)
+	{
+		if (port->port_min == port->port_max)
+			sprintf(buf, "%u", port->port_min);
+		else
+			sprintf(buf, "%u-%u", port->port_min, port->port_max);
+
+		fw3_ipt_rule_addarg(r, false, "--to-ports", buf);
+	}
+}
+
+static void
 set_snat_dnat(struct fw3_ipt_rule *r, enum fw3_flag target,
               struct fw3_address *addr, struct fw3_port *port)
 {
@@ -366,43 +437,15 @@ set_snat_dnat(struct fw3_ipt_rule *r, enum fw3_flag target,
 static void
 set_target_nat(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
 {
-	if (redir->target == FW3_FLAG_DNAT)
+	if (redir->local)
+		set_redirect(r, &redir->port_redir);
+	else if (redir->target == FW3_FLAG_DNAT)
 		set_snat_dnat(r, redir->target, &redir->ip_redir, &redir->port_redir);
 	else
 		set_snat_dnat(r, redir->target, &redir->ip_dest, &redir->port_dest);
 }
 
 static void
-append_chain_filter(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
-{
-	if (redir->target == FW3_FLAG_DNAT)
-	{
-		/* XXX: check for local ip */
-		if (!redir->ip_redir.set)
-			fw3_ipt_rule_append(r, "zone_%s_input", redir->src.name);
-		else
-			fw3_ipt_rule_append(r, "zone_%s_forward", redir->src.name);
-	}
-	else
-	{
-		if (redir->src.set && !redir->src.any)
-			fw3_ipt_rule_append(r, "zone_%s_forward", redir->src.name);
-		else
-			fw3_ipt_rule_append(r, "delegate_forward");
-	}
-}
-
-static void
-set_target_filter(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
-{
-	/* XXX: check for local ip */
-	if (redir->target == FW3_FLAG_DNAT && !redir->ip_redir.set)
-		fw3_ipt_rule_extra(r, "-m conntrack --ctstate DNAT");
-
-	fw3_ipt_rule_target(r, "ACCEPT");
-}
-
-static void
 set_comment(struct fw3_ipt_rule *r, const char *name, int num, bool ref)
 {
 	if (name)
@@ -457,25 +500,6 @@ print_redirect(struct fw3_ipt_handle *h, struct fw3_state *state,
 		append_chain_nat(r, redir);
 		break;
 
-	case FW3_TABLE_FILTER:
-		src = &redir->ip_src;
-		dst = &redir->ip_redir;
-		spt = &redir->port_src;
-		dpt = &redir->port_redir;
-
-		r = fw3_ipt_rule_create(h, proto, NULL, NULL, src, dst);
-		fw3_ipt_rule_sport_dport(r, spt, dpt);
-		fw3_ipt_rule_mac(r, mac);
-		fw3_ipt_rule_ipset(r, &redir->ipset);
-		fw3_ipt_rule_limit(r, &redir->limit);
-		fw3_ipt_rule_time(r, &redir->time);
-		fw3_ipt_rule_mark(r, &redir->mark);
-		set_target_filter(r, redir);
-		fw3_ipt_rule_extra(r, redir->extra);
-		set_comment(r, redir->name, num, false);
-		append_chain_filter(r, redir);
-		break;
-
 	default:
 		break;
 	}
@@ -498,7 +522,7 @@ print_reflection(struct fw3_ipt_handle *h, struct fw3_state *state,
 		fw3_ipt_rule_time(r, &redir->time);
 		set_comment(r, redir->name, num, true);
 		set_snat_dnat(r, FW3_FLAG_DNAT, &redir->ip_redir, &redir->port_redir);
-		fw3_ipt_rule_append(r, "zone_%s_prerouting", redir->dest.name);
+		fw3_ipt_rule_replace(r, "zone_%s_prerouting", redir->dest.name);
 
 		r = fw3_ipt_rule_create(h, proto, NULL, NULL, ia, &redir->ip_redir);
 		fw3_ipt_rule_sport_dport(r, NULL, &redir->port_redir);
@@ -506,17 +530,7 @@ print_reflection(struct fw3_ipt_handle *h, struct fw3_state *state,
 		fw3_ipt_rule_time(r, &redir->time);
 		set_comment(r, redir->name, num, true);
 		set_snat_dnat(r, FW3_FLAG_SNAT, ra, NULL);
-		fw3_ipt_rule_append(r, "zone_%s_postrouting", redir->dest.name);
-		break;
-
-	case FW3_TABLE_FILTER:
-		r = fw3_ipt_rule_create(h, proto, NULL, NULL, ia, &redir->ip_redir);
-		fw3_ipt_rule_sport_dport(r, NULL, &redir->port_redir);
-		fw3_ipt_rule_limit(r, &redir->limit);
-		fw3_ipt_rule_time(r, &redir->time);
-		set_comment(r, redir->name, num, true);
-		fw3_ipt_rule_target(r, "zone_%s_dest_ACCEPT", redir->dest.name);
-		fw3_ipt_rule_append(r, "zone_%s_forward", redir->dest.name);
+		fw3_ipt_rule_replace(r, "zone_%s_postrouting", redir->dest.name);
 		break;
 
 	default:
@@ -581,14 +595,14 @@ expand_redirect(struct fw3_ipt_handle *handle, struct fw3_state *state,
 		print_redirect(handle, state, redir, num, proto, mac);
 
 	/* reflection rules */
-	if (redir->target != FW3_FLAG_DNAT || !redir->reflection)
+	if (redir->target != FW3_FLAG_DNAT || !redir->reflection || redir->local)
 		return;
 
 	if (!redir->_dest || !redir->_src->masq)
 		return;
 
-	ext_addrs = fw3_resolve_zone_addresses(redir->_src);
-	int_addrs = fw3_resolve_zone_addresses(redir->_dest);
+	ext_addrs = fw3_resolve_zone_addresses(redir->_src, &redir->ip_dest);
+	int_addrs = fw3_resolve_zone_addresses(redir->_dest, NULL);
 
 	if (!ext_addrs || !int_addrs)
 		goto out;
@@ -605,7 +619,7 @@ expand_redirect(struct fw3_ipt_handle *handle, struct fw3_state *state,
 
 			fw3_foreach(proto, &redir->proto)
 			{
-				if (!proto || (proto->protocol != 6 && proto->protocol != 17))
+				if (!proto)
 					continue;
 
 				if (redir->reflection_src == FW3_REFLECTION_INTERNAL)
@@ -613,8 +627,8 @@ expand_redirect(struct fw3_ipt_handle *handle, struct fw3_state *state,
 				else
 					ref_addr = *ext_addr;
 
-				ref_addr.mask = 32;
-				ext_addr->mask = 32;
+				ref_addr.mask.v4.s_addr = 0xFFFFFFFF;
+				ext_addr->mask.v4.s_addr = 0xFFFFFFFF;
 
 				print_reflection(handle, state, redir, num, proto,
 								 &ref_addr, int_addr, ext_addr);