X-Git-Url: http://git.archive.openwrt.org/?p=project%2Ffirewall3.git;a=blobdiff_plain;f=main.c;h=5888ab50285a6e416d3434ea28f9e16901d7106a;hp=fdb901a7ba997b4e366f0608ca469f35a2ae29d4;hb=0a7d36d8cf56f160b531f3db9f045e3f9315dd15;hpb=ea1e5c25c1c4c8c82b51c0440d033944ccb4e2e2

diff --git a/main.c b/main.c
index fdb901a..5888ab5 100644
--- a/main.c
+++ b/main.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
@@ -24,58 +24,92 @@
 #include "zones.h"
 #include "rules.h"
 #include "redirects.h"
+#include "snats.h"
 #include "forwards.h"
 #include "ipsets.h"
+#include "includes.h"
 #include "ubus.h"
+#include "iptables.h"
 
 
-static bool print_rules = false;
-static bool skip_family[FW3_FAMILY_V6 + 1] = { false };
+static enum fw3_family print_family = FW3_FAMILY_ANY;
 
+static struct fw3_state *run_state = NULL;
+static struct fw3_state *cfg_state = NULL;
 
-static struct fw3_state *
-build_state(void)
+
+static bool
+build_state(bool runtime)
 {
 	struct fw3_state *state = NULL;
 	struct uci_package *p = NULL;
+	FILE *sf;
 
-	state = malloc(sizeof(*state));
-
+	state = calloc(1, sizeof(*state));
 	if (!state)
 		error("Out of memory");
 
-	memset(state, 0, sizeof(*state));
 	state->uci = uci_alloc_context();
 
 	if (!state->uci)
 		error("Out of memory");
 
-	if (uci_load(state->uci, "firewall", &p))
+	if (runtime)
 	{
-		uci_perror(state->uci, NULL);
-		error("Failed to load /etc/config/firewall");
-	}
+		sf = fopen(FW3_STATEFILE, "r");
+
+		if (sf)
+		{
+			uci_import(state->uci, sf, "fw3_state", &p, true);
+			fclose(sf);
+		}
+
+		if (!p)
+		{
+			uci_free_context(state->uci);
+			free(state);
+
+			return false;
+		}
+
+		state->statefile = true;
 
-	if (!fw3_find_command("ipset"))
+		run_state = state;
+	}
+	else
 	{
-		warn("Unable to locate ipset utility, disabling ipset support");
-		state->disable_ipsets = true;
+		if (!fw3_ubus_connect())
+			warn("Failed to connect to ubus");
+
+		if (uci_load(state->uci, "firewall", &p))
+		{
+			uci_perror(state->uci, NULL);
+			error("Failed to load /etc/config/firewall");
+		}
+
+		if (!fw3_find_command("ipset"))
+		{
+			warn("Unable to locate ipset utility, disabling ipset support");
+			state->disable_ipsets = true;
+		}
+
+		cfg_state = state;
 	}
 
+
+	struct blob_buf b = {NULL, NULL, 0, NULL};
+	fw3_ubus_rules(&b);
+
 	fw3_load_defaults(state, p);
 	fw3_load_ipsets(state, p);
 	fw3_load_zones(state, p);
-	fw3_load_rules(state, p);
-	fw3_load_redirects(state, p);
+	fw3_load_rules(state, p, b.head);
+	fw3_load_redirects(state, p, b.head);
+	fw3_load_snats(state, p, b.head);
 	fw3_load_forwards(state, p);
+	fw3_load_includes(state, p);
 
-	if (state->defaults.disable_ipv6 && !skip_family[FW3_FAMILY_V6])
-	{
-		warn("IPv6 rules globally disabled in configuration");
-		skip_family[FW3_FAMILY_V6] = true;
-	}
-
-	return state;
+	return true;
 }
 
 static void
@@ -92,9 +126,18 @@ free_state(struct fw3_state *state)
 	list_for_each_safe(cur, tmp, &state->redirects)
 		fw3_free_redirect((struct fw3_redirect *)cur);
 
+	list_for_each_safe(cur, tmp, &state->snats)
+		fw3_free_snat((struct fw3_snat *)cur);
+
 	list_for_each_safe(cur, tmp, &state->forwards)
 		fw3_free_forward((struct fw3_forward *)cur);
 
+	list_for_each_safe(cur, tmp, &state->ipsets)
+		fw3_free_ipset((struct fw3_ipset *)cur);
+
+	list_for_each_safe(cur, tmp, &state->includes)
+		fw3_free_include((struct fw3_include *)cur);
+
 	uci_free_context(state->uci);
 
 	free(state);
@@ -104,148 +147,295 @@ free_state(struct fw3_state *state)
 
 
 static bool
-restore_pipe(enum fw3_family family, bool silent)
+family_running(enum fw3_family family)
 {
-	const char *cmd[] = {
-		"(bug)",
-		"iptables-restore",
-		"ip6tables-restore",
-	};
-
-	if (print_rules)
-		return fw3_stdout_pipe();
+	return (run_state && has(run_state->defaults.flags, family, family));
+}
 
-	if (!fw3_command_pipe(silent, cmd[family], "--lenient", "--noflush"))
-	{
-		warn("Unable to execute %s", cmd[family]);
-		return false;
-	}
+static void
+family_set(struct fw3_state *state, enum fw3_family family, bool set)
+{
+	if (!state)
+		return;
 
-	return true;
+	if (set)
+		set(state->defaults.flags, family, family);
+	else
+		del(state->defaults.flags, family, family);
 }
 
 static int
-stop(struct fw3_state *state, bool complete, bool ipsets)
+stop(bool complete)
 {
+	int rv = 1;
 	enum fw3_family family;
 	enum fw3_table table;
+	struct fw3_ipt_handle *handle;
 
-	struct list_head *statefile = fw3_read_state();
+	if (!complete && !run_state)
+	{
+		warn("The firewall appears to be stopped. "
+			 "Use the 'flush' command to forcefully purge all rules.");
+
+		return rv;
+	}
 
-	const char *tables[] = {
-		"filter",
-		"nat",
-		"mangle",
-		"raw",
-	};
+	if (!print_family && run_state)
+		fw3_hotplug_zones(run_state, false);
 
 	for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
 	{
-		if (skip_family[family] || !restore_pipe(family, true))
+		if (!complete && !family_running(family))
 			continue;
 
-		info("Removing IPv%d rules ...", family == FW3_FAMILY_V4 ? 4 : 6);
-
 		for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
 		{
-			if (!fw3_has_table(family == FW3_FAMILY_V6, tables[table]))
+			if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
 				continue;
 
-			info(" * %sing %s table",
-			     complete ? "Flush" : "Clear", tables[table]);
+			if (!(handle = fw3_ipt_open(family, table)))
+				continue;
 
-			fw3_pr("*%s\n", tables[table]);
+			info(" * %sing %s %s table", complete ? "Flush" : "Clear",
+			     fw3_flag_names[family], fw3_flag_names[table]);
 
 			if (complete)
 			{
-				fw3_flush_all(table);
+				fw3_flush_all(handle);
 			}
-			else
+			else if (run_state)
 			{
-				/* pass 1 */
-				fw3_flush_rules(table, family, false, statefile);
-				fw3_flush_zones(table, family, false, statefile);
-
-				/* pass 2 */
-				fw3_flush_rules(table, family, true, statefile);
-				fw3_flush_zones(table, family, true, statefile);
+				fw3_flush_rules(handle, run_state, false);
+				fw3_flush_zones(handle, run_state, false);
 			}
 
-			fw3_pr("COMMIT\n");
+			fw3_ipt_commit(handle);
+			fw3_ipt_close(handle);
 		}
 
-		fw3_command_close();
+		family_set(run_state, family, false);
+		family_set(cfg_state, family, false);
+
+		rv = 0;
 	}
 
-	if (ipsets && fw3_command_pipe(false, "ipset", "-exist", "-"))
+	if (run_state)
+		fw3_destroy_ipsets(run_state);
+
+	if (complete)
+		fw3_flush_conntrack(NULL);
+
+	if (!rv && run_state)
+		fw3_write_statefile(run_state);
+
+	return rv;
+}
+
+static int
+start(void)
+{
+	int rv = 1;
+	enum fw3_family family;
+	enum fw3_table table;
+	struct fw3_ipt_handle *handle;
+
+	if (!print_family)
+		fw3_create_ipsets(cfg_state);
+
+	for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
 	{
-		fw3_destroy_ipsets(statefile);
-		fw3_command_close();
+		if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
+			continue;
+
+		if (print_family && family != print_family)
+			continue;
+
+		if (!print_family && family_running(family))
+		{
+			warn("The %s firewall appears to be started already. "
+			     "If it is indeed empty, remove the %s file and retry.",
+			     fw3_flag_names[family], FW3_STATEFILE);
+
+			continue;
+		}
+
+		for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
+		{
+			if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
+				continue;
+
+			if (!(handle = fw3_ipt_open(family, table)))
+				continue;
+
+			info(" * Populating %s %s table",
+			     fw3_flag_names[family], fw3_flag_names[table]);
+
+			fw3_print_default_chains(handle, cfg_state, false);
+			fw3_print_zone_chains(handle, cfg_state, false);
+			fw3_print_default_head_rules(handle, cfg_state, false);
+			fw3_print_rules(handle, cfg_state);
+			fw3_print_redirects(handle, cfg_state);
+			fw3_print_snats(handle, cfg_state);
+			fw3_print_forwards(handle, cfg_state);
+			fw3_print_zone_rules(handle, cfg_state, false);
+			fw3_print_default_tail_rules(handle, cfg_state, false);
+
+			if (!print_family)
+				fw3_ipt_commit(handle);
+
+			fw3_ipt_close(handle);
+		}
+
+		if (!print_family)
+			fw3_print_includes(cfg_state, family, false);
+
+		family_set(run_state, family, true);
+		family_set(cfg_state, family, true);
+
+		rv = 0;
 	}
 
-	fw3_free_state(statefile);
+	if (!rv)
+	{
+		fw3_flush_conntrack(run_state);
+		fw3_set_defaults(cfg_state);
 
-	return 0;
+		if (!print_family)
+		{
+			fw3_run_includes(cfg_state, false);
+			fw3_hotplug_zones(cfg_state, true);
+			fw3_write_statefile(cfg_state);
+		}
+	}
+
+	return rv;
 }
 
+
 static int
-start(struct fw3_state *state)
+reload(void)
 {
+	int rv = 1;
 	enum fw3_family family;
 	enum fw3_table table;
+	struct fw3_ipt_handle *handle;
+
+	if (!run_state)
+		return start();
+
+	fw3_hotplug_zones(run_state, false);
+
+	for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
+	{
+		if (!family_running(family))
+			goto start;
+
+		for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
+		{
+			if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
+				continue;
+
+			if (!(handle = fw3_ipt_open(family, table)))
+				continue;
+
+			info(" * Clearing %s %s table",
+			     fw3_flag_names[family], fw3_flag_names[table]);
+
+			fw3_flush_rules(handle, run_state, true);
+			fw3_flush_zones(handle, run_state, true);
+			fw3_ipt_commit(handle);
+			fw3_ipt_close(handle);
+		}
+
+		family_set(run_state, family, false);
+		family_set(cfg_state, family, false);
 
-	const char *tables[] = {
-		"filter",
-		"nat",
-		"mangle",
-		"raw",
-	};
+start:
+		if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
+			continue;
+
+		for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
+		{
+			if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
+				continue;
+
+			if (!(handle = fw3_ipt_open(family, table)))
+				continue;
+
+			info(" * Populating %s %s table",
+			     fw3_flag_names[family], fw3_flag_names[table]);
+
+			fw3_print_default_chains(handle, cfg_state, true);
+			fw3_print_zone_chains(handle, cfg_state, true);
+			fw3_print_default_head_rules(handle, cfg_state, true);
+			fw3_print_rules(handle, cfg_state);
+			fw3_print_redirects(handle, cfg_state);
+			fw3_print_snats(handle, cfg_state);
+			fw3_print_forwards(handle, cfg_state);
+			fw3_print_zone_rules(handle, cfg_state, true);
+			fw3_print_default_tail_rules(handle, cfg_state, true);
+
+			fw3_ipt_commit(handle);
+			fw3_ipt_close(handle);
+		}
 
-	if (!print_rules && fw3_command_pipe(false, "ipset", "-exist", "-"))
+		fw3_print_includes(cfg_state, family, true);
+
+		family_set(run_state, family, true);
+		family_set(cfg_state, family, true);
+
+		rv = 0;
+	}
+
+	if (!rv)
 	{
-		fw3_create_ipsets(state);
-		fw3_command_close();
+		fw3_flush_conntrack(run_state);
+
+		fw3_set_defaults(cfg_state);
+		fw3_run_includes(cfg_state, true);
+		fw3_hotplug_zones(cfg_state, true);
+		fw3_write_statefile(cfg_state);
 	}
 
+	return rv;
+}
+
+static int
+gc(void)
+{
+	enum fw3_family family;
+	enum fw3_table table;
+	struct fw3_ipt_handle *handle;
+
 	for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
 	{
-		if (skip_family[family] || !restore_pipe(family, false))
+		if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
 			continue;
 
-		info("Constructing IPv%d rules ...", family == FW3_FAMILY_V4 ? 4 : 6);
-
 		for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
 		{
-			if (!fw3_has_table(family == FW3_FAMILY_V6, tables[table]))
+			if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
 				continue;
 
-			info(" * Populating %s table", tables[table]);
-
-			fw3_pr("*%s\n", tables[table]);
-			fw3_print_default_chains(table, family, state);
-			fw3_print_zone_chains(table, family, state);
-			fw3_print_default_head_rules(table, family, state);
-			fw3_print_rules(table, family, state);
-			fw3_print_redirects(table, family, state);
-			fw3_print_forwards(table, family, state);
-			fw3_print_zone_rules(table, family, state);
-			fw3_print_default_tail_rules(table, family, state);
-			fw3_pr("COMMIT\n");
-		}
+			if (!(handle = fw3_ipt_open(family, table)))
+				continue;
 
-		fw3_command_close();
+			fw3_ipt_gc(handle);
+			fw3_ipt_commit(handle);
+			fw3_ipt_close(handle);
+		}
 	}
 
 	return 0;
 }
 
 static int
-lookup_network(struct fw3_state *state, const char *net)
+lookup_network(const char *net)
 {
 	struct fw3_zone *z;
 	struct fw3_device *d;
 
-	list_for_each_entry(z, &state->zones, list)
+	list_for_each_entry(z, &cfg_state->zones, list)
 	{
 		list_for_each_entry(d, &z->networks, list)
 		{
@@ -261,12 +451,12 @@ lookup_network(struct fw3_state *state, const char *net)
 }
 
 static int
-lookup_device(struct fw3_state *state, const char *dev)
+lookup_device(const char *dev)
 {
 	struct fw3_zone *z;
 	struct fw3_device *d;
 
-	list_for_each_entry(z, &state->zones, list)
+	list_for_each_entry(z, &cfg_state->zones, list)
 	{
 		list_for_each_entry(d, &z->devices, list)
 		{
@@ -282,11 +472,42 @@ lookup_device(struct fw3_state *state, const char *dev)
 }
 
 static int
+lookup_zone(const char *zone, const char *device)
+{
+	struct fw3_zone *z;
+	struct fw3_device *d;
+
+	list_for_each_entry(z, &cfg_state->zones, list)
+	{
+		if (strcmp(z->name, zone))
+			continue;
+
+		list_for_each_entry(d, &z->devices, list)
+		{
+			if (device && strcmp(device, d->name))
+				continue;
+
+			printf("%s\n", d->name);
+
+			if (device)
+				return 0;
+		}
+
+		if (!device)
+			return 0;
+	}
+
+	return 1;
+}
+
+static int
 usage(void)
 {
-	fprintf(stderr, "fw3 [-4] [-6] [-q] {start|stop|flush|restart|print}\n");
+	fprintf(stderr, "fw3 [-4] [-6] [-q] print\n");
+	fprintf(stderr, "fw3 [-q] {start|stop|flush|reload|restart}\n");
 	fprintf(stderr, "fw3 [-q] network {net}\n");
 	fprintf(stderr, "fw3 [-q] device {dev}\n");
+	fprintf(stderr, "fw3 [-q] zone {zone} [dev]\n");
 
 	return 1;
 }
@@ -295,24 +516,27 @@ usage(void)
 int main(int argc, char **argv)
 {
 	int ch, rv = 1;
-	struct fw3_state *state = NULL;
+	enum fw3_family family = FW3_FAMILY_ANY;
+	struct fw3_defaults *defs = NULL;
 
-	while ((ch = getopt(argc, argv, "46qh")) != -1)
+	while ((ch = getopt(argc, argv, "46dqh")) != -1)
 	{
 		switch (ch)
 		{
 		case '4':
-			skip_family[FW3_FAMILY_V4] = false;
-			skip_family[FW3_FAMILY_V6] = true;
+			family = FW3_FAMILY_V4;
 			break;
 
 		case '6':
-			skip_family[FW3_FAMILY_V4] = true;
-			skip_family[FW3_FAMILY_V6] = false;
+			family = FW3_FAMILY_V6;
+			break;
+
+		case 'd':
+			fw3_pr_debug = true;
 			break;
 
 		case 'q':
-			freopen("/dev/null", "w", stderr);
+			if (freopen("/dev/null", "w", stderr)) {}
 			break;
 
 		case 'h':
@@ -321,13 +545,8 @@ int main(int argc, char **argv)
 		}
 	}
 
-	if (!fw3_ubus_connect())
-		error("Failed to connect to ubus");
-
-	state = build_state();
-
-	if (!fw3_lock())
-		goto out;
+	build_state(false);
+	defs = &cfg_state->defaults;
 
 	if (optind >= argc)
 	{
@@ -337,69 +556,98 @@ int main(int argc, char **argv)
 
 	if (!strcmp(argv[optind], "print"))
 	{
-		freopen("/dev/null", "w", stderr);
+		if (family == FW3_FAMILY_ANY)
+		{
+			family = FW3_FAMILY_V4;
+		}
+		else if (family == FW3_FAMILY_V6)
+		{
+			if (defs->disable_ipv6)
+				warn("IPv6 rules globally disabled in configuration");
+#ifdef DISABLE_IPV6
+			else
+				warn("IPv6 support is not compiled in");
+#endif
+		}
 
-		state->disable_ipsets = true;
-		print_rules = true;
+		if (freopen("/dev/null", "w", stderr)) {};
 
-		if (!skip_family[FW3_FAMILY_V4] && !skip_family[FW3_FAMILY_V6])
-			skip_family[FW3_FAMILY_V6] = true;
+		cfg_state->disable_ipsets = true;
+		print_family = family;
+		fw3_pr_debug = true;
 
-		rv = start(state);
+		if (fw3_lock())
+		{
+			build_state(true);
+			rv = start();
+			fw3_unlock();
+		}
 	}
 	else if (!strcmp(argv[optind], "start"))
 	{
-		if (fw3_has_state())
+		if (fw3_lock())
 		{
-			warn("The firewall appears to be started already. "
-				 "If it is indeed empty, remove the %s file and retry.",
-				 FW3_STATEFILE);
-
-			goto out;
+			build_state(true);
+			rv = start();
+			fw3_unlock();
 		}
-
-		rv = start(state);
-		fw3_write_state(state);
 	}
 	else if (!strcmp(argv[optind], "stop"))
 	{
-		if (!fw3_has_state())
+		if (fw3_lock())
 		{
-			warn("The firewall appears to be stopped. "
-				 "Use the 'flush' command to forcefully purge all rules.");
-
-			goto out;
+			build_state(true);
+			rv = stop(false);
+			fw3_unlock();
 		}
-
-		rv = stop(state, false, true);
-
-		fw3_remove_state();
 	}
 	else if (!strcmp(argv[optind], "flush"))
 	{
-		rv = stop(state, true, true);
-
-		if (fw3_has_state())
-			fw3_remove_state();
+		if (fw3_lock())
+		{
+			build_state(true);
+			rv = stop(true);
+			fw3_unlock();
+		}
 	}
 	else if (!strcmp(argv[optind], "restart"))
 	{
-		if (fw3_has_state())
+		if (fw3_lock())
 		{
-			stop(state, false, false);
-			fw3_remove_state();
+			build_state(true);
+			stop(true);
+			rv = start();
+			fw3_unlock();
+		}
+	}
+	else if (!strcmp(argv[optind], "reload"))
+	{
+		if (fw3_lock())
+		{
+			build_state(true);
+			rv = reload();
+			fw3_unlock();
+		}
+	}
+	else if (!strcmp(argv[optind], "gc"))
+	{
+		if (fw3_lock())
+		{
+			rv = gc();
+			fw3_unlock();
 		}
-
-		rv = start(state);
-		fw3_write_state(state);
 	}
 	else if (!strcmp(argv[optind], "network") && (optind + 1) < argc)
 	{
-		rv = lookup_network(state, argv[optind + 1]);
+		rv = lookup_network(argv[optind + 1]);
 	}
 	else if (!strcmp(argv[optind], "device") && (optind + 1) < argc)
 	{
-		rv = lookup_device(state, argv[optind + 1]);
+		rv = lookup_device(argv[optind + 1]);
+	}
+	else if (!strcmp(argv[optind], "zone") && (optind + 1) < argc)
+	{
+		rv = lookup_zone(argv[optind + 1], argv[optind + 2]);
 	}
 	else
 	{
@@ -407,10 +655,11 @@ int main(int argc, char **argv)
 	}
 
 out:
-	if (state)
-		free_state(state);
+	if (cfg_state)
+		free_state(cfg_state);
 
-	fw3_unlock();
+	if (run_state)
+		free_state(run_state);
 
 	return rv;
 }