#include "redirects.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));
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())
+ 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;
}
fw3_load_defaults(state, p);
fw3_load_rules(state, p);
fw3_load_redirects(state, p);
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
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);
static bool
-restore_pipe(enum fw3_family family, bool silent)
+family_running(enum fw3_family family)
{
- const char *cmd[] = {
- "(bug)",
- "iptables-restore",
- "ip6tables-restore",
- };
+ return (run_state && has(run_state->defaults.flags, family, family));
+}
- if (print_rules)
- return fw3_stdout_pipe();
+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
+ del(state->defaults.flags, family, family);
+}
- if (!fw3_command_pipe(silent, cmd[family], "--lenient", "--noflush"))
+static int
+stop(bool complete)
+{
+ FILE *ct;
+
+ int rv = 1;
+ enum fw3_family family;
+ enum fw3_table table;
+ struct fw3_ipt_handle *handle;
+
+ if (!complete && !run_state)
{
- warn("Unable to execute %s", cmd[family]);
- return false;
+ warn("The firewall appears to be stopped. "
+ "Use the 'flush' command to forcefully purge all rules.");
+
+ return rv;
}
- return true;
+ 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(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]);
+
+ if (complete)
+ {
+ fw3_flush_all(handle);
+ }
+ else if (run_state)
+ {
+ fw3_flush_rules(handle, run_state, false);
+ fw3_flush_zones(handle, run_state, false);
+ }
+
+ fw3_ipt_commit(handle);
+ fw3_ipt_close(handle);
+ }
+
+ family_set(run_state, family, false);
+ family_set(cfg_state, family, false);
+
+ rv = 0;
+ }
+
+ if (run_state)
+ fw3_destroy_ipsets(run_state);
+
+ if (complete && (ct = fopen("/proc/net/nf_conntrack", "w")) != NULL)
+ {
+ info(" * Flushing conntrack table ...");
+
+ fwrite("f\n", 2, 1, ct);
+ fclose(ct);
+ }
+
+ if (!rv && run_state)
+ fw3_write_statefile(run_state);
+
+ return rv;
}
static int
-stop(struct fw3_state *state, bool complete)
+start(void)
{
+ int rv = 1;
enum fw3_family family;
enum fw3_table table;
+ struct fw3_ipt_handle *handle;
- const char *tables[] = {
- "filter",
- "nat",
- "mangle",
- "raw",
- };
+ if (!print_family)
+ fw3_create_ipsets(cfg_state);
for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
{
- if (skip_family[family] || !restore_pipe(family, true))
+ if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
continue;
- info("Removing IPv%d rules ...", family == FW3_FAMILY_V4 ? 4 : 6);
+ 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, tables[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 table",
- complete ? "Flush" : "Clear", tables[table]);
+ info(" * Populating %s %s table",
+ fw3_flag_names[family], fw3_flag_names[table]);
- fw3_pr("*%s\n", tables[table]);
- fw3_print_flush_rules(table, family, state, complete);
- fw3_pr("COMMIT\n");
+ 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_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);
}
- fw3_command_close();
+ 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 (complete && fw3_command_pipe(false, "ipset", "-exist", "-"))
+ if (!rv)
{
- fw3_destroy_ipsets(state);
- fw3_command_close();
+ 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 0;
+ 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;
- const char *tables[] = {
- "filter",
- "nat",
- "mangle",
- "raw",
- };
+ if (!run_state)
+ return start();
- if (!print_rules && fw3_command_pipe(false, "ipset", "-exist", "-"))
- {
- fw3_create_ipsets(state);
- fw3_command_close();
- }
+ fw3_hotplug_zones(run_state, false);
for (family = FW3_FAMILY_V4; family <= FW3_FAMILY_V6; family++)
{
- if (skip_family[family] || !restore_pipe(family, false))
- continue;
+ 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("Constructing IPv%d rules ...", family == FW3_FAMILY_V4 ? 4 : 6);
+ 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, tables[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 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_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_pr("COMMIT\n");
+ 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_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_command_close();
+ fw3_print_includes(cfg_state, family, true);
+
+ family_set(run_state, family, true);
+ family_set(cfg_state, family, true);
+
+ rv = 0;
}
- return 0;
+ if (!rv)
+ {
+ 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
-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
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");
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':
}
}
- if (!fw3_ubus_connect())
- error("Failed to connect to ubus");
-
- state = build_state();
+ build_state(false);
+ build_state(true);
+ defs = &cfg_state->defaults;
if (optind >= argc)
{
if (!strcmp(argv[optind], "print"))
{
- state->disable_ipsets = true;
- print_rules = true;
+ 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
+ }
- if (!skip_family[FW3_FAMILY_V4] && !skip_family[FW3_FAMILY_V6])
- skip_family[FW3_FAMILY_V6] = true;
+ freopen("/dev/null", "w", stderr);
- rv = start(state);
+ cfg_state->disable_ipsets = true;
+ print_family = family;
+ fw3_pr_debug = true;
+
+ rv = start();
}
else if (!strcmp(argv[optind], "start"))
{
- if (!fw3_check_statefile(false))
- goto out;
-
- rv = start(state);
- fw3_close_statefile();
+ if (fw3_lock())
+ {
+ rv = start();
+ fw3_unlock();
+ }
}
else if (!strcmp(argv[optind], "stop"))
{
- if (!fw3_check_statefile(true))
- goto out;
-
- rv = stop(state, false);
- fw3_remove_statefile();
+ if (fw3_lock())
+ {
+ rv = stop(false);
+ fw3_unlock();
+ }
}
else if (!strcmp(argv[optind], "flush"))
{
- rv = stop(state, true);
- fw3_remove_statefile();
+ if (fw3_lock())
+ {
+ rv = stop(true);
+ fw3_unlock();
+ }
}
else if (!strcmp(argv[optind], "restart"))
{
- if (fw3_check_statefile(true))
+ if (fw3_lock())
{
- stop(state, false);
- fw3_remove_statefile();
+ stop(true);
+ rv = start();
+ fw3_unlock();
+ }
+ }
+ else if (!strcmp(argv[optind], "reload"))
+ {
+ if (fw3_lock())
+ {
+ rv = reload();
+ fw3_unlock();
}
-
- if (!fw3_check_statefile(false))
- goto out;
-
- rv = start(state);
- fw3_close_statefile();
}
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
{
}
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