X-Git-Url: http://git.archive.openwrt.org/?p=project%2Ffirewall3.git;a=blobdiff_plain;f=rules.c;h=5fb99984c6162b13198ca588618886e679b1b265;hp=5a6ea004bf42b33a68e9fd4bc8c705affe509c57;hb=c328d1f6fe982888b5f5852423ee0a41cee3adb1;hpb=a1cf3074e2eae780226c79477e895479ba6e29f2

diff --git a/rules.c b/rules.c
index 5a6ea00..5fb9998 100644
--- a/rules.c
+++ b/rules.c
@@ -1,7 +1,7 @@
 /*
  * firewall3 - 3rd OpenWrt UCI firewall implementation
  *
- *   Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
+ *   Copyright (C) 2013 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
@@ -28,15 +28,18 @@ const struct fw3_option fw3_rule_opts[] = {
 	FW3_OPT("src",                 device,    rule,     src),
 	FW3_OPT("dest",                device,    rule,     dest),
 
-	FW3_OPT("ipset",               device,    rule,     ipset),
+	FW3_OPT("device",              string,    rule,     device),
+	FW3_OPT("direction",           direction, rule,     direction_out),
+
+	FW3_OPT("ipset",               setmatch,  rule,     ipset),
 
 	FW3_LIST("proto",              protocol,  rule,     proto),
 
-	FW3_LIST("src_ip",             address,   rule,     ip_src),
+	FW3_LIST("src_ip",             network,   rule,     ip_src),
 	FW3_LIST("src_mac",            mac,       rule,     mac_src),
 	FW3_LIST("src_port",           port,      rule,     port_src),
 
-	FW3_LIST("dest_ip",            address,   rule,     ip_dest),
+	FW3_LIST("dest_ip",            network,   rule,     ip_dest),
 	FW3_LIST("dest_port",          port,      rule,     port_dest),
 
 	FW3_LIST("icmp_type",          icmptype,  rule,     icmp_type),
@@ -63,29 +66,18 @@ const struct fw3_option fw3_rule_opts[] = {
 };
 
 
-void
-fw3_load_rules(struct fw3_state *state, struct uci_package *p)
+static bool
+need_src_action_chain(struct fw3_rule *r)
 {
-	struct uci_section *s;
-	struct uci_element *e;
-	struct fw3_rule *rule;
-
-	INIT_LIST_HEAD(&state->rules);
-
-	uci_foreach_element(&p->sections, e)
-	{
-		s = uci_to_section(e);
-
-		if (strcmp(s->type, "rule"))
-			continue;
-
-		rule = malloc(sizeof(*rule));
-
-		if (!rule)
-			continue;
+	return (r->_src && r->_src->log && (r->target > FW3_FLAG_ACCEPT));
+}
 
-		memset(rule, 0, sizeof(*rule));
+static struct fw3_rule*
+alloc_rule(struct fw3_state *state)
+{
+	struct fw3_rule *rule = calloc(1, sizeof(*rule));
 
+	if (rule) {
 		INIT_LIST_HEAD(&rule->proto);
 
 		INIT_LIST_HEAD(&rule->ip_src);
@@ -97,130 +89,196 @@ fw3_load_rules(struct fw3_state *state, struct uci_package *p)
 
 		INIT_LIST_HEAD(&rule->icmp_type);
 
+		list_add_tail(&rule->list, &state->rules);
 		rule->enabled = true;
+	}
 
-		fw3_parse_options(rule, fw3_rule_opts, s);
+	return rule;
+}
 
-		if (!rule->enabled)
-		{
-			fw3_free_rule(rule);
-			continue;
-		}
+#define warn_rule(r, e, fmt, ...)									\
+	do {															\
+		if (e)														\
+			warn_elem(e, fmt, ##__VA_ARGS__);						\
+		else														\
+			warn("Warning: ubus rule (%s) " fmt, 					\
+			     (r && r->name) ? r->name : "?", ##__VA_ARGS__);	\
+	} while(0)
+
+static bool
+check_rule(struct fw3_state *state, struct fw3_rule *r, struct uci_element *e)
+{
+	if (!r->enabled)
+		return false;
 
-		if (rule->src.invert || rule->dest.invert)
-		{
-			warn_elem(e, "must not have inverted 'src' or 'dest' options");
-			fw3_free_rule(rule);
-			continue;
-		}
-		else if (rule->src.set && !rule->src.any &&
-		         !(rule->_src = fw3_lookup_zone(state, rule->src.name)))
-		{
-			warn_elem(e, "refers to not existing zone '%s'", rule->src.name);
-			fw3_free_rule(rule);
-			continue;
-		}
-		else if (rule->dest.set && !rule->dest.any &&
-		         !(rule->_dest = fw3_lookup_zone(state, rule->dest.name)))
-		{
-			warn_elem(e, "refers to not existing zone '%s'", rule->dest.name);
-			fw3_free_rule(rule);
-			continue;
-		}
-		else if (rule->ipset.set && state->disable_ipsets)
-		{
-			warn_elem(e, "skipped due to disabled ipset support");
-			fw3_free_rule(rule);
-			continue;
-		}
-		else if (rule->ipset.set && !rule->ipset.any &&
-		         !(rule->_ipset = fw3_lookup_ipset(state, rule->ipset.name)))
-		{
-			warn_elem(e, "refers to unknown ipset '%s'", rule->ipset.name);
-			fw3_free_rule(rule);
-			continue;
-		}
+	if (r->src.invert || r->dest.invert)
+	{
+		warn_rule(r, e, "must not have inverted 'src' or 'dest' options");
+		return false;
+	}
+	else if (r->src.set && !r->src.any &&
+	         !(r->_src = fw3_lookup_zone(state, r->src.name)))
+	{
+		warn_rule(r, e, "refers to not existing zone '%s'", r->src.name);
+		return false;
+	}
+	else if (r->dest.set && !r->dest.any &&
+	         !(r->_dest = fw3_lookup_zone(state, r->dest.name)))
+	{
+		warn_rule(r, e, "refers to not existing zone '%s'", r->dest.name);
+		return false;
+	}
+	else if (r->ipset.set && state->disable_ipsets)
+	{
+		warn_rule(r, e, "skipped due to disabled ipset support");
+		return false;
+	}
+	else if (r->ipset.set &&
+	         !(r->ipset.ptr = fw3_lookup_ipset(state, r->ipset.name)))
+	{
+		warn_rule(r, e, "refers to unknown ipset '%s'", r->ipset.name);
+		return false;
+	}
 
-		if (!rule->_src && rule->target == FW3_FLAG_NOTRACK)
-		{
-			warn_elem(e, "is set to target NOTRACK but has no source assigned");
-			fw3_free_rule(rule);
+	if (!r->_src && r->target == FW3_FLAG_NOTRACK)
+	{
+		warn_rule(r, e, "is set to target NOTRACK but has no source assigned");
+		return false;
+	}
+
+	if (!r->set_mark.set && !r->set_xmark.set &&
+	    r->target == FW3_FLAG_MARK)
+	{
+		warn_rule(r, e, "is set to target MARK but specifies neither "
+		                "'set_mark' nor 'set_xmark' option");
+		return false;
+	}
+
+	if (r->_dest && r->target == FW3_FLAG_MARK)
+	{
+		warn_rule(r, e, "must not specify 'dest' for MARK target");
+		return false;
+	}
+
+	if (r->set_mark.invert || r->set_xmark.invert)
+	{
+		warn_rule(r, e, "must not have inverted 'set_mark' or 'set_xmark'");
+		return false;
+	}
+
+	if (!r->_src && !r->_dest && !r->src.any && !r->dest.any)
+	{
+		warn_rule(r, e, "has neither a source nor a destination zone assigned "
+		                "- assuming an output r");
+	}
+
+	if (list_empty(&r->proto))
+	{
+		warn_rule(r, e, "does not specify a protocol, assuming TCP+UDP");
+		fw3_parse_protocol(&r->proto, "tcpudp", true);
+	}
+
+	if (r->target == FW3_FLAG_UNSPEC)
+	{
+		warn_rule(r, e, "has no target specified, defaulting to REJECT");
+		r->target = FW3_FLAG_REJECT;
+	}
+	else if (r->target > FW3_FLAG_MARK)
+	{
+		warn_rule(r, e, "has invalid target specified, defaulting to REJECT");
+		r->target = FW3_FLAG_REJECT;
+	}
+
+	/* NB: r family... */
+	if (r->_dest)
+	{
+		fw3_setbit(r->_dest->flags[0], r->target);
+		fw3_setbit(r->_dest->flags[1], r->target);
+	}
+	else if (need_src_action_chain(r))
+	{
+		fw3_setbit(r->_src->flags[0], fw3_to_src_target(r->target));
+		fw3_setbit(r->_src->flags[1], fw3_to_src_target(r->target));
+	}
+
+	return true;
+}
+
+void
+fw3_load_rules(struct fw3_state *state, struct uci_package *p,
+		struct blob_attr *a)
+{
+	struct uci_section *s;
+	struct uci_element *e;
+	struct fw3_rule *rule;
+	struct blob_attr *entry, *opt;
+	unsigned rem, orem;
+
+	INIT_LIST_HEAD(&state->rules);
+
+	blob_for_each_attr(entry, a, rem) {
+		const char *type = NULL;
+		const char *name = "ubus rule";
+		blobmsg_for_each_attr(opt, entry, orem)
+			if (!strcmp(blobmsg_name(opt), "type"))
+				type = blobmsg_get_string(opt);
+			else if (!strcmp(blobmsg_name(opt), "name"))
+				name = blobmsg_get_string(opt);
+
+		if (!type || strcmp(type, "rule"))
 			continue;
-		}
 
-		if (!rule->set_mark.set && !rule->set_xmark.set &&
-		    rule->target == FW3_FLAG_MARK)
-		{
-			warn_elem(e, "is set to target MARK but specifies neither "
-			             "'set_mark' nor 'set_xmark' option");
-			fw3_free_rule(rule);
+		if (!(rule = alloc_rule(state)))
 			continue;
-		}
 
-		if (rule->_dest && rule->target == FW3_FLAG_MARK)
+		if (!fw3_parse_blob_options(rule, fw3_rule_opts, entry, name))
 		{
-			warn_elem(e, "must not specify 'dest' for MARK target");
+			warn_rule(rule, NULL, "skipped due to invalid options\n");
 			fw3_free_rule(rule);
 			continue;
 		}
 
-		if (rule->set_mark.invert || rule->set_xmark.invert)
-		{
-			warn_elem(e, "must not have inverted 'set_mark' or 'set_xmark'");
+		if (!check_rule(state, rule, NULL))
 			fw3_free_rule(rule);
-			continue;
-		}
+	}
 
-		if (!rule->_src && !rule->_dest && !rule->src.any && !rule->dest.any)
-		{
-			warn_elem(e, "has neither a source nor a destination zone assigned "
-			             "- assuming an output rule");
-		}
+	uci_foreach_element(&p->sections, e)
+	{
+		s = uci_to_section(e);
 
-		if (list_empty(&rule->proto))
-		{
-			warn_elem(e, "does not specify a protocol, assuming TCP+UDP");
-			fw3_parse_protocol(&rule->proto, "tcpudp", true);
-		}
+		if (strcmp(s->type, "rule"))
+			continue;
 
-		if (rule->target == FW3_FLAG_UNSPEC)
-		{
-			warn_elem(e, "has no target specified, defaulting to REJECT");
-			rule->target = FW3_FLAG_REJECT;
-		}
-		else if (rule->target > FW3_FLAG_MARK)
-		{
-			warn_elem(e, "has invalid target specified, defaulting to REJECT");
-			rule->target = FW3_FLAG_REJECT;
-		}
+		if (!(rule = alloc_rule(state)))
+			continue;
 
-		/* NB: rule family... */
-		if (rule->_dest)
+		if (!fw3_parse_options(rule, fw3_rule_opts, s))
 		{
-			setbit(rule->_dest->flags[0], rule->target);
-			setbit(rule->_dest->flags[1], rule->target);
+			warn_elem(e, "skipped due to invalid options");
+			fw3_free_rule(rule);
+			continue;
 		}
 
-		list_add_tail(&rule->list, &state->rules);
-		continue;
+		if (!check_rule(state, rule, e))
+			fw3_free_rule(rule);
 	}
 }
 
 
 static void
-print_chain(struct fw3_rule *rule)
+append_chain(struct fw3_ipt_rule *r, struct fw3_rule *rule)
 {
-	char chain[256];
+	char chain[32];
 
-	sprintf(chain, "delegate_output");
+	snprintf(chain, sizeof(chain), "OUTPUT");
 
 	if (rule->target == FW3_FLAG_NOTRACK)
 	{
-		sprintf(chain, "zone_%s_notrack", rule->src.name);
+		snprintf(chain, sizeof(chain), "zone_%s_notrack", rule->src.name);
 	}
-	else if (rule->target == FW3_FLAG_MARK)
+	else if (rule->target == FW3_FLAG_MARK && (rule->_src || rule->src.any))
 	{
-		sprintf(chain, "fwmark");
+		snprintf(chain, sizeof(chain), "PREROUTING");
 	}
 	else
 	{
@@ -229,98 +287,127 @@ print_chain(struct fw3_rule *rule)
 			if (!rule->src.any)
 			{
 				if (rule->dest.set)
-					sprintf(chain, "zone_%s_forward", rule->src.name);
+					snprintf(chain, sizeof(chain), "zone_%s_forward",
+					         rule->src.name);
 				else
-					sprintf(chain, "zone_%s_input", rule->src.name);
+					snprintf(chain, sizeof(chain), "zone_%s_input",
+					         rule->src.name);
 			}
 			else
 			{
 				if (rule->dest.set)
-					sprintf(chain, "delegate_forward");
+					snprintf(chain, sizeof(chain), "FORWARD");
 				else
-					sprintf(chain, "delegate_input");
+					snprintf(chain, sizeof(chain), "INPUT");
 			}
 		}
 
 		if (rule->dest.set && !rule->src.set)
-			sprintf(chain, "zone_%s_output", rule->dest.name);
+		{
+			if (rule->dest.any)
+				snprintf(chain, sizeof(chain), "OUTPUT");
+			else
+				snprintf(chain, sizeof(chain), "zone_%s_output",
+				         rule->dest.name);
+		}
 	}
 
-	fw3_pr("-A %s", chain);
+	fw3_ipt_rule_append(r, chain);
 }
 
-static void print_target(struct fw3_rule *rule)
+static void set_target(struct fw3_ipt_rule *r, struct fw3_rule *rule)
 {
-	const char *target;
+	const char *name;
+	struct fw3_mark *mark;
+	char buf[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
 
 	switch(rule->target)
 	{
 	case FW3_FLAG_MARK:
-		if (rule->set_mark.set)
-			fw3_pr(" -j MARK --set-mark 0x%x/0x%x\n",
-			       rule->set_mark.mark, rule->set_mark.mask);
-		else
-			fw3_pr(" -j MARK --set-xmark 0x%x/0x%x\n",
-			       rule->set_xmark.mark, rule->set_xmark.mask);
+		name = rule->set_mark.set ? "--set-mark" : "--set-xmark";
+		mark = rule->set_mark.set ? &rule->set_mark : &rule->set_xmark;
+		sprintf(buf, "0x%x/0x%x", mark->mark, mark->mask);
+
+		fw3_ipt_rule_target(r, "MARK");
+		fw3_ipt_rule_addarg(r, false, name, buf);
+		return;
+
+	case FW3_FLAG_NOTRACK:
+		fw3_ipt_rule_target(r, "CT");
+		fw3_ipt_rule_addarg(r, false, "--notrack", NULL);
 		return;
 
 	case FW3_FLAG_ACCEPT:
 	case FW3_FLAG_DROP:
-	case FW3_FLAG_NOTRACK:
-		target = fw3_flag_names[rule->target];
+		name = fw3_flag_names[rule->target];
 		break;
 
 	default:
-		target = fw3_flag_names[FW3_FLAG_REJECT];
+		name = fw3_flag_names[FW3_FLAG_REJECT];
 		break;
 	}
 
 	if (rule->dest.set && !rule->dest.any)
-		fw3_pr(" -j zone_%s_dest_%s\n", rule->dest.name, target);
-	else if (rule->target == FW3_FLAG_REJECT)
-		fw3_pr(" -j reject\n");
+		fw3_ipt_rule_target(r, "zone_%s_dest_%s", rule->dest.name, name);
+	else if (need_src_action_chain(rule))
+		fw3_ipt_rule_target(r, "zone_%s_src_%s", rule->src.name, name);
+	else if (strcmp(name, "REJECT"))
+		fw3_ipt_rule_target(r, name);
+	else
+		fw3_ipt_rule_target(r, "reject");
+}
+
+static void
+set_comment(struct fw3_ipt_rule *r, const char *name, int num)
+{
+	if (name)
+		fw3_ipt_rule_comment(r, name);
 	else
-		fw3_pr(" -j %s\n", target);
+		fw3_ipt_rule_comment(r, "@rule[%u]", num);
 }
 
 static void
-print_rule(struct fw3_state *state, enum fw3_family family,
-           enum fw3_table table, struct fw3_rule *rule,
-           struct fw3_protocol *proto,
+print_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
+           struct fw3_rule *rule, int num, struct fw3_protocol *proto,
            struct fw3_address *sip, struct fw3_address *dip,
            struct fw3_port *sport, struct fw3_port *dport,
            struct fw3_mac *mac, struct fw3_icmptype *icmptype)
 {
-	if (!fw3_is_family(sip, family) || !fw3_is_family(dip, family))
+	struct fw3_ipt_rule *r;
+
+	if (!fw3_is_family(sip, handle->family) ||
+	    !fw3_is_family(dip, handle->family))
 	{
-		info("     ! Skipping due to different family of ip address");
+		if ((sip && !sip->resolved) || (dip && !dip->resolved))
+			info("     ! Skipping due to different family of ip address");
+
 		return;
 	}
 
-	if (proto->protocol == 58 && family == FW3_FAMILY_V4)
+	if (proto->protocol == 58 && handle->family == FW3_FAMILY_V4)
 	{
 		info("     ! Skipping due to different family of protocol");
 		return;
 	}
 
-	print_chain(rule);
-	fw3_format_ipset(rule->_ipset, rule->ipset.invert);
-	fw3_format_protocol(proto, family);
-	fw3_format_src_dest(sip, dip);
-	fw3_format_sport_dport(sport, dport);
-	fw3_format_icmptype(icmptype, family);
-	fw3_format_mac(mac);
-	fw3_format_limit(&rule->limit);
-	fw3_format_time(&rule->time);
-	fw3_format_mark(&rule->mark);
-	fw3_format_extra(rule->extra);
-	fw3_format_comment(rule->name);
-	print_target(rule);
+	r = fw3_ipt_rule_create(handle, proto, NULL, NULL, sip, dip);
+	fw3_ipt_rule_sport_dport(r, sport, dport);
+	fw3_ipt_rule_device(r, rule->device, rule->direction_out);
+	fw3_ipt_rule_icmptype(r, icmptype);
+	fw3_ipt_rule_mac(r, mac);
+	fw3_ipt_rule_ipset(r, &rule->ipset);
+	fw3_ipt_rule_limit(r, &rule->limit);
+	fw3_ipt_rule_time(r, &rule->time);
+	fw3_ipt_rule_mark(r, &rule->mark);
+	set_target(r, rule);
+	fw3_ipt_rule_extra(r, rule->extra);
+	set_comment(r, rule->name, num);
+	append_chain(r, rule);
 }
 
 static void
-expand_rule(struct fw3_state *state, enum fw3_family family,
-            enum fw3_table table, struct fw3_rule *rule, int num)
+expand_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
+            struct fw3_rule *rule, int num)
 {
 	struct fw3_protocol *proto;
 	struct fw3_address *sip;
@@ -337,12 +424,12 @@ expand_rule(struct fw3_state *state, enum fw3_family family,
 	struct list_head empty;
 	INIT_LIST_HEAD(&empty);
 
-	if (!fw3_is_family(rule, family))
+	if (!fw3_is_family(rule, handle->family))
 		return;
 
-	if ((rule->target == FW3_FLAG_NOTRACK && table != FW3_TABLE_RAW) ||
-	    (rule->target == FW3_FLAG_MARK && table != FW3_TABLE_MANGLE) ||
-		(rule->target < FW3_FLAG_NOTRACK && table != FW3_TABLE_FILTER))
+	if ((rule->target == FW3_FLAG_NOTRACK && handle->table != FW3_TABLE_RAW) ||
+	    (rule->target == FW3_FLAG_MARK && handle->table != FW3_TABLE_MANGLE) ||
+		(rule->target < FW3_FLAG_NOTRACK && handle->table != FW3_TABLE_FILTER))
 		return;
 
 	if (rule->name)
@@ -350,22 +437,30 @@ expand_rule(struct fw3_state *state, enum fw3_family family,
 	else
 		info("   * Rule #%u", num);
 
-	if (!fw3_is_family(rule->_src, family) ||
-	    !fw3_is_family(rule->_dest, family))
+	if (!fw3_is_family(rule->_src, handle->family) ||
+	    !fw3_is_family(rule->_dest, handle->family))
 	{
 		info("     ! Skipping due to different family of zone");
 		return;
 	}
 
-	if (rule->_ipset)
+	if (rule->ipset.ptr)
 	{
-		if (!fw3_is_family(rule->_ipset, family))
+		if (!fw3_is_family(rule->ipset.ptr, handle->family))
 		{
 			info("     ! Skipping due to different family in ipset");
 			return;
 		}
 
-		set(rule->_ipset->flags, family, family);
+		if (!fw3_check_ipset(rule->ipset.ptr))
+		{
+			info("     ! Skipping due to missing ipset '%s'",
+			     rule->ipset.ptr->external
+					? rule->ipset.ptr->external : rule->ipset.ptr->name);
+			return;
+		}
+
+		set(rule->ipset.ptr->flags, handle->family, handle->family);
 	}
 
 	list_for_each_entry(proto, &rule->proto, list)
@@ -390,18 +485,17 @@ expand_rule(struct fw3_state *state, enum fw3_family family,
 		fw3_foreach(dport, dports)
 		fw3_foreach(mac, &rule->mac_src)
 		fw3_foreach(icmptype, icmptypes)
-			print_rule(state, family, table, rule, proto, sip, dip,
+			print_rule(handle, state, rule, num, proto, sip, dip,
 			           sport, dport, mac, icmptype);
 	}
 }
 
 void
-fw3_print_rules(struct fw3_state *state, enum fw3_family family,
-                enum fw3_table table)
+fw3_print_rules(struct fw3_ipt_handle *handle, struct fw3_state *state)
 {
 	int num = 0;
 	struct fw3_rule *rule;
 
 	list_for_each_entry(rule, &state->rules, list)
-		expand_rule(state, family, table, rule, num++);
+		expand_rule(handle, state, rule, num++);
 }