/*
* 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
#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 enum fw3_family use_family = FW3_FAMILY_ANY;
+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;
- if (!fw3_ubus_connect())
- error("Failed to connect to ubus");
-
- 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;
+ }
- if (!fw3_find_command("ipset"))
+ state->statefile = true;
+
+ run_state = state;
+ }
+ else
{
- warn("Unable to locate ipset utility, disabling ipset support");
- state->disable_ipsets = true;
+ if (!fw3_ubus_connect())
+ error("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;
}
- INIT_LIST_HEAD(&state->running_zones);
- INIT_LIST_HEAD(&state->running_ipsets);
+
+ 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_rules(state, p, b.head);
fw3_load_redirects(state, p);
+ fw3_load_snats(state, p, b.head);
fw3_load_forwards(state, p);
fw3_load_includes(state, p);
- state->statefile = fw3_read_statefile(state);
-
- return state;
+ return true;
}
static void
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);
static bool
-restore_pipe(enum fw3_family family, bool silent)
+family_running(enum fw3_family family)
{
- const char *cmd;
-
- cmd = (family == FW3_FAMILY_V4) ? "iptables-restore" : "ip6tables-restore";
-
- if (print_rules)
- return fw3_stdout_pipe();
-
- if (!fw3_command_pipe(silent, cmd, "--lenient", "--noflush"))
- {
- warn("Unable to execute %s", cmd);
- return false;
- }
-
- return true;
-}
-
-static bool
-family_running(struct fw3_state *state, enum fw3_family family)
-{
- return has(state->defaults.flags, family, family);
-}
-
-static bool
-family_used(enum fw3_family family)
-{
- return (use_family == FW3_FAMILY_ANY) || (use_family == family);
+ return (run_state && has(run_state->defaults.flags, family, family));
}
static void
family_set(struct fw3_state *state, enum fw3_family family, bool set)
{
+ if (!state)
+ return;
+
if (set)
set(state->defaults.flags, family, family);
else
}
static int
-stop(struct fw3_state *state, bool complete, bool reload)
+stop(bool complete)
{
- FILE *ct;
-
int rv = 1;
enum fw3_family family;
enum fw3_table table;
+ struct fw3_ipt_handle *handle;
- if (!complete && !state->statefile)
+ if (!complete && !run_state)
{
- if (!reload)
- warn("The firewall appears to be stopped. "
- "Use the 'flush' command to forcefully purge all rules.");
+ warn("The firewall appears to be stopped. "
+ "Use the 'flush' command to forcefully purge all rules.");
return rv;
}
- if (!print_rules)
- fw3_hotplug_zones(false, state);
+ if (!print_family && run_state)
+ fw3_hotplug_zones(run_state, false);
for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
{
- if (!complete && !family_running(state, family))
- continue;
-
- if (!family_used(family) || !restore_pipe(family, true))
+ if (!complete && !family_running(family))
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(" * %sing %s %s table", complete ? "Flush" : "Clear",
fw3_flag_names[family], fw3_flag_names[table]);
- fw3_pr("*%s\n", 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, reload, state);
- fw3_flush_zones(table, family, false, reload, state);
-
- /* pass 2 */
- fw3_flush_rules(table, family, true, reload, state);
- fw3_flush_zones(table, family, true, reload, state);
+ 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();
-
- if (!reload)
- {
- if (fw3_command_pipe(false, "ipset", "-exist", "-"))
- {
- fw3_destroy_ipsets(state, family);
- fw3_command_close();
- }
-
- family_set(state, family, false);
- }
+ family_set(run_state, family, false);
+ family_set(cfg_state, family, false);
rv = 0;
}
- if (complete && (ct = fopen("/proc/net/nf_conntrack", "w")) != NULL)
- {
- info(" * Flushing conntrack table ...");
+ if (run_state)
+ fw3_destroy_ipsets(run_state);
- fwrite("f\n", 2, 1, ct);
- fclose(ct);
- }
+ if (complete)
+ fw3_flush_conntrack(NULL);
- if (!rv)
- fw3_write_statefile(state);
+ if (!rv && run_state)
+ fw3_write_statefile(run_state);
return rv;
}
static int
-start(struct fw3_state *state, bool reload)
+start(void)
{
int rv = 1;
enum fw3_family family;
enum fw3_table table;
+ struct fw3_ipt_handle *handle;
- if (!print_rules && !reload)
- {
- if (fw3_command_pipe(false, "ipset", "-exist", "-"))
- {
- fw3_create_ipsets(state);
- fw3_command_close();
- }
- }
+ if (!print_family)
+ fw3_create_ipsets(cfg_state);
for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
{
- if (!family_used(family))
+ if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
continue;
- if (!print_rules && !reload && family_running(state, family))
+ 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.",
continue;
}
- if (!restore_pipe(family, false))
+ 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;
+ }
+
+ if (!rv)
+ {
+ fw3_flush_conntrack(run_state);
+ fw3_set_defaults(cfg_state);
+
+ if (!print_family)
+ {
+ fw3_run_includes(cfg_state, false);
+ fw3_hotplug_zones(cfg_state, true);
+ fw3_write_statefile(cfg_state);
+ }
+ }
+
+ return rv;
+}
+
+
+static int
+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);
+
+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_pr("*%s\n", fw3_flag_names[table]);
- fw3_print_default_chains(table, family, reload, state);
- fw3_print_zone_chains(table, family, reload, state);
- fw3_print_default_head_rules(table, family, reload, 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, reload, state);
- fw3_print_default_tail_rules(table, family, reload, state);
- fw3_pr("COMMIT\n");
+ 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);
}
- fw3_print_includes(state, family, reload);
+ fw3_print_includes(cfg_state, family, true);
- fw3_command_close();
- family_set(state, family, true);
+ family_set(run_state, family, true);
+ family_set(cfg_state, family, true);
rv = 0;
}
if (!rv)
{
- fw3_set_defaults(state);
+ 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);
+ }
- if (!print_rules)
+ 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 (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
+ continue;
+
+ for (table = FW3_TABLE_FILTER; table <= FW3_TABLE_RAW; table++)
{
- fw3_run_includes(state, reload);
- fw3_hotplug_zones(true, state);
- fw3_write_statefile(state);
+ if (!fw3_has_table(family == FW3_FAMILY_V6, fw3_flag_names[table]))
+ continue;
+
+ if (!(handle = fw3_ipt_open(family, table)))
+ continue;
+
+ fw3_ipt_gc(handle);
+ fw3_ipt_commit(handle);
+ fw3_ipt_close(handle);
}
}
- return rv;
+ 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)
{
}
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)
{
}
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|reload|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;
}
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, "46dqh")) != -1)
switch (ch)
{
case '4':
- use_family = FW3_FAMILY_V4;
+ family = FW3_FAMILY_V4;
break;
case '6':
- use_family = FW3_FAMILY_V6;
+ family = FW3_FAMILY_V6;
break;
case 'd':
break;
case 'q':
- freopen("/dev/null", "w", stderr);
+ if (freopen("/dev/null", "w", stderr)) {}
break;
case 'h':
}
}
- state = build_state();
- defs = &state->defaults;
+ build_state(false);
+ defs = &cfg_state->defaults;
if (optind >= argc)
{
goto out;
}
- if (use_family == FW3_FAMILY_V6 && defs->disable_ipv6)
- warn("IPv6 rules globally disabled in configuration");
-
if (!strcmp(argv[optind], "print"))
{
- if (use_family == FW3_FAMILY_ANY)
- use_family = FW3_FAMILY_V4;
+ 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
+ }
- freopen("/dev/null", "w", stderr);
+ if (freopen("/dev/null", "w", stderr)) {};
- state->disable_ipsets = true;
- print_rules = true;
+ cfg_state->disable_ipsets = true;
+ print_family = family;
+ fw3_pr_debug = true;
- rv = start(state, false);
+ if (fw3_lock())
+ {
+ build_state(true);
+ rv = start();
+ fw3_unlock();
+ }
}
else if (!strcmp(argv[optind], "start"))
{
if (fw3_lock())
{
- rv = start(state, false);
+ build_state(true);
+ rv = start();
fw3_unlock();
}
}
{
if (fw3_lock())
{
- rv = stop(state, false, false);
+ build_state(true);
+ rv = stop(false);
fw3_unlock();
}
}
{
if (fw3_lock())
{
- rv = stop(state, true, false);
+ build_state(true);
+ rv = stop(true);
fw3_unlock();
}
}
{
if (fw3_lock())
{
- stop(state, true, false);
- free_state(state);
-
- state = build_state();
- rv = start(state, false);
-
+ build_state(true);
+ stop(true);
+ rv = start();
fw3_unlock();
}
}
{
if (fw3_lock())
{
- rv = stop(state, false, true);
- rv = start(state, !rv);
-
+ build_state(true);
+ rv = reload();
+ fw3_unlock();
+ }
+ }
+ else if (!strcmp(argv[optind], "gc"))
+ {
+ if (fw3_lock())
+ {
+ rv = gc();
fw3_unlock();
}
}
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
{
}
out:
- if (state)
- free_state(state);
+ if (cfg_state)
+ free_state(cfg_state);
+
+ if (run_state)
+ free_state(run_state);
return rv;
}
projects / project / firewall3.git / blobdiff