/*
* 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
#include "zones.h"
#include "ubus.h"
+#include "helpers.h"
-#define C(f, tbl, tgt, name) \
- { FW3_FAMILY_##f, FW3_TABLE_##tbl, FW3_TARGET_##tgt, name }
+#define C(f, tbl, tgt, fmt) \
+ { FW3_FAMILY_##f, FW3_TABLE_##tbl, FW3_FLAG_##tgt, fmt }
-struct chain {
- enum fw3_family family;
- enum fw3_table table;
- enum fw3_target target;
- const char *name;
-};
+static const struct fw3_chain_spec zone_chains[] = {
+ C(ANY, FILTER, UNSPEC, "zone_%s_input"),
+ C(ANY, FILTER, UNSPEC, "zone_%s_output"),
+ C(ANY, FILTER, UNSPEC, "zone_%s_forward"),
-static const struct chain src_chains[] = {
- C(ANY, FILTER, UNSPEC, "zone_%s_input"),
- C(ANY, FILTER, UNSPEC, "zone_%s_output"),
- C(ANY, FILTER, UNSPEC, "zone_%s_forward"),
+ C(ANY, FILTER, SRC_ACCEPT, "zone_%s_src_ACCEPT"),
+ C(ANY, FILTER, SRC_REJECT, "zone_%s_src_REJECT"),
+ C(ANY, FILTER, SRC_DROP, "zone_%s_src_DROP"),
- C(ANY, FILTER, ACCEPT, "zone_%s_src_ACCEPT"),
- C(ANY, FILTER, REJECT, "zone_%s_src_REJECT"),
- C(ANY, FILTER, DROP, "zone_%s_src_DROP"),
-};
+ C(ANY, FILTER, ACCEPT, "zone_%s_dest_ACCEPT"),
+ C(ANY, FILTER, REJECT, "zone_%s_dest_REJECT"),
+ C(ANY, FILTER, DROP, "zone_%s_dest_DROP"),
+
+ C(V4, NAT, SNAT, "zone_%s_postrouting"),
+ C(V4, NAT, DNAT, "zone_%s_prerouting"),
+
+ C(ANY, RAW, HELPER, "zone_%s_helper"),
+ C(ANY, RAW, NOTRACK, "zone_%s_notrack"),
+
+ C(ANY, FILTER, CUSTOM_CHAINS, "input_%s_rule"),
+ C(ANY, FILTER, CUSTOM_CHAINS, "output_%s_rule"),
+ C(ANY, FILTER, CUSTOM_CHAINS, "forwarding_%s_rule"),
+
+ C(V4, NAT, CUSTOM_CHAINS, "prerouting_%s_rule"),
+ C(V4, NAT, CUSTOM_CHAINS, "postrouting_%s_rule"),
-static const struct chain dst_chains[] = {
- C(ANY, FILTER, ACCEPT, "zone_%s_dest_ACCEPT"),
- C(ANY, FILTER, REJECT, "zone_%s_dest_REJECT"),
- C(ANY, FILTER, DROP, "zone_%s_dest_DROP"),
+ { }
+};
- C(V4, NAT, SNAT, "zone_%s_postrouting"),
- C(V4, NAT, DNAT, "zone_%s_prerouting"),
+enum fw3_zone_logmask {
+ FW3_ZONE_LOG_FILTER = (1 << 0),
+ FW3_ZONE_LOG_MANGLE = (1 << 1),
};
const struct fw3_option fw3_zone_opts[] = {
+ FW3_OPT("enabled", bool, zone, enabled),
+
FW3_OPT("name", string, zone, name),
FW3_OPT("family", family, zone, family),
FW3_LIST("network", device, zone, networks),
FW3_LIST("device", device, zone, devices),
- FW3_LIST("subnet", address, zone, subnets),
+ FW3_LIST("subnet", network, zone, subnets),
FW3_OPT("input", target, zone, policy_input),
FW3_OPT("forward", target, zone, policy_forward),
FW3_OPT("output", target, zone, policy_output),
FW3_OPT("masq", bool, zone, masq),
- FW3_LIST("masq_src", address, zone, masq_src),
- FW3_LIST("masq_dest", address, zone, masq_dest),
+ FW3_OPT("masq_allow_invalid", bool, zone, masq_allow_invalid),
+ FW3_LIST("masq_src", network, zone, masq_src),
+ FW3_LIST("masq_dest", network, zone, masq_dest),
FW3_OPT("extra", string, zone, extra_src),
FW3_OPT("extra_src", string, zone, extra_src),
FW3_OPT("extra_dest", string, zone, extra_dest),
- FW3_OPT("conntrack", bool, zone, conntrack),
FW3_OPT("mtu_fix", bool, zone, mtu_fix),
FW3_OPT("custom_chains", bool, zone, custom_chains),
- FW3_OPT("log", bool, zone, log),
+ FW3_OPT("log", int, zone, log),
FW3_OPT("log_limit", limit, zone, log_limit),
- { }
-};
-
+ FW3_OPT("auto_helper", bool, zone, auto_helper),
+ FW3_LIST("helper", cthelper, zone, cthelpers),
-static bool
-print_chains(enum fw3_table table, enum fw3_family family,
- const char *fmt, const char *name, uint16_t targets,
- const struct chain *chains, int n)
-{
- bool rv = false;
- char cn[128] = { 0 };
- const struct chain *c;
-
- for (c = chains; n > 0; c++, n--)
- {
- if (!fw3_is_family(c, family))
- continue;
-
- if (c->table != table)
- continue;
+ FW3_OPT("__flags_v4", int, zone, flags[0]),
+ FW3_OPT("__flags_v6", int, zone, flags[1]),
- if ((c->target != FW3_TARGET_UNSPEC) && !hasbit(targets, c->target))
- continue;
+ FW3_LIST("__addrs", address, zone, old_addrs),
- snprintf(cn, sizeof(cn), c->name, name);
- fw3_pr(fmt, cn);
+ { }
+};
- rv = true;
- }
-
- return rv;
-}
static void
-check_policy(struct uci_element *e, enum fw3_target *pol, enum fw3_target def,
+check_policy(struct uci_element *e, enum fw3_flag *pol, enum fw3_flag def,
const char *name)
{
- if (*pol == FW3_TARGET_UNSPEC)
+ if (*pol == FW3_FLAG_UNSPEC)
{
warn_elem(e, "has no %s policy specified, using default", name);
*pol = def;
}
- else if (*pol > FW3_TARGET_DROP)
+ else if (*pol > FW3_FLAG_DROP)
{
warn_elem(e, "has invalid %s policy, using default", name);
*pol = def;
}
}
+static bool
+check_masq_addrs(struct list_head *head)
+{
+ struct fw3_address *addr;
+ int n_addr = 0, n_failed = 0;
+
+ list_for_each_entry(addr, head, list)
+ {
+ if (addr->invert)
+ continue;
+
+ n_addr++;
+
+ if (!addr->set && addr->resolved)
+ n_failed++;
+ }
+
+ return (n_addr == 0 || n_failed < n_addr);
+}
+
static void
resolve_networks(struct uci_element *e, struct fw3_zone *zone)
{
continue;
}
+ snprintf(tmp->network, sizeof(tmp->network), "%s", net->name);
list_add_tail(&tmp->list, &zone->devices);
}
}
+static void
+resolve_cthelpers(struct fw3_state *s, struct uci_element *e, struct fw3_zone *zone)
+{
+ struct fw3_cthelpermatch *match;
+
+ if (list_empty(&zone->cthelpers))
+ {
+ if (!zone->masq && zone->auto_helper)
+ {
+ fw3_setbit(zone->flags[0], FW3_FLAG_HELPER);
+ fw3_setbit(zone->flags[1], FW3_FLAG_HELPER);
+ }
+
+ return;
+ }
+
+ list_for_each_entry(match, &zone->cthelpers, list)
+ {
+ if (match->invert)
+ {
+ warn_elem(e, "must not use a negated helper match");
+ continue;
+ }
+
+ match->ptr = fw3_lookup_cthelper(s, match->name);
+
+ if (!match->ptr)
+ {
+ warn_elem(e, "refers to not existing helper '%s'", match->name);
+ continue;
+ }
+
+ if (fw3_is_family(match->ptr, FW3_FAMILY_V4))
+ fw3_setbit(zone->flags[0], FW3_FLAG_HELPER);
+
+ if (fw3_is_family(match->ptr, FW3_FAMILY_V6))
+ fw3_setbit(zone->flags[1], FW3_FLAG_HELPER);
+ }
+}
+
struct fw3_zone *
fw3_alloc_zone(void)
{
struct fw3_zone *zone;
- zone = malloc(sizeof(*zone));
-
+ zone = calloc(1, sizeof(*zone));
if (!zone)
return NULL;
- memset(zone, 0, sizeof(*zone));
-
INIT_LIST_HEAD(&zone->networks);
INIT_LIST_HEAD(&zone->devices);
INIT_LIST_HEAD(&zone->subnets);
INIT_LIST_HEAD(&zone->masq_src);
INIT_LIST_HEAD(&zone->masq_dest);
+ INIT_LIST_HEAD(&zone->cthelpers);
+ INIT_LIST_HEAD(&zone->old_addrs);
+
+ zone->enabled = true;
+ zone->auto_helper = true;
+ zone->custom_chains = true;
zone->log_limit.rate = 10;
return zone;
if (!zone)
continue;
- fw3_parse_options(zone, fw3_zone_opts, s);
+ if (!fw3_parse_options(zone, fw3_zone_opts, s))
+ warn_elem(e, "has invalid options");
+
+ if (!zone->enabled)
+ {
+ fw3_free_zone(zone);
+ continue;
+ }
if (!zone->extra_dest)
zone->extra_dest = zone->extra_src;
+ if (!defs->custom_chains && zone->custom_chains)
+ zone->custom_chains = false;
+
+ if (!defs->auto_helper && zone->auto_helper)
+ zone->auto_helper = false;
+
if (!zone->name || !*zone->name)
{
warn_elem(e, "has no name - ignoring");
continue;
}
+ if (strlen(zone->name) > FW3_ZONE_MAXNAMELEN)
+ {
+ warn_elem(e, "must not have a name longer than %u characters",
+ FW3_ZONE_MAXNAMELEN);
+ fw3_free_zone(zone);
+ continue;
+ }
+
+ fw3_ubus_zone_devices(zone);
+
if (list_empty(&zone->networks) && list_empty(&zone->devices) &&
list_empty(&zone->subnets) && !zone->extra_src)
{
warn_elem(e, "has no device, network, subnet or extra options");
}
+ if (!check_masq_addrs(&zone->masq_src))
+ {
+ warn_elem(e, "has unresolved masq_src, disabling masq");
+ zone->masq = false;
+ }
+
+ if (!check_masq_addrs(&zone->masq_dest))
+ {
+ warn_elem(e, "has unresolved masq_dest, disabling masq");
+ zone->masq = false;
+ }
+
check_policy(e, &zone->policy_input, defs->policy_input, "input");
check_policy(e, &zone->policy_output, defs->policy_output, "output");
check_policy(e, &zone->policy_forward, defs->policy_forward, "forward");
if (zone->masq)
{
- setbit(zone->dst_flags, FW3_TARGET_SNAT);
- zone->conntrack = true;
+ fw3_setbit(zone->flags[0], FW3_FLAG_SNAT);
}
- setbit(zone->src_flags, zone->policy_input);
- setbit(zone->dst_flags, zone->policy_output);
- setbit(zone->dst_flags, zone->policy_forward);
+ if (zone->custom_chains)
+ {
+ fw3_setbit(zone->flags[0], FW3_FLAG_SNAT);
+ fw3_setbit(zone->flags[0], FW3_FLAG_DNAT);
+ }
+
+ resolve_cthelpers(state, e, zone);
+
+ fw3_setbit(zone->flags[0], fw3_to_src_target(zone->policy_input));
+ fw3_setbit(zone->flags[0], zone->policy_forward);
+ fw3_setbit(zone->flags[0], zone->policy_output);
+
+ fw3_setbit(zone->flags[1], fw3_to_src_target(zone->policy_input));
+ fw3_setbit(zone->flags[1], zone->policy_forward);
+ fw3_setbit(zone->flags[1], zone->policy_output);
list_add_tail(&zone->list, &state->zones);
}
static void
-print_zone_chain(enum fw3_table table, enum fw3_family family,
- struct fw3_zone *zone, struct fw3_state *state)
+print_zone_chain(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ bool reload, struct fw3_zone *zone)
{
- bool s, d;
-
- if (!fw3_is_family(zone, family))
+ int i;
+ struct fw3_ipt_rule *r;
+ const struct fw3_chain_spec *c;
+
+ const char *flt_chains[] = {
+ "input", "input",
+ "output", "output",
+ "forward", "forwarding",
+ };
+
+ const char *nat_chains[] = {
+ "prerouting", "prerouting",
+ "postrouting", "postrouting",
+ };
+
+ if (!fw3_is_family(zone, handle->family))
return;
- setbit(zone->dst_flags, family);
+ set(zone->flags, handle->family, handle->table);
- if (!zone->conntrack && !state->defaults.drop_invalid)
- setbit(zone->dst_flags, FW3_TARGET_NOTRACK);
+ if (zone->custom_chains)
+ set(zone->flags, handle->family, FW3_FLAG_CUSTOM_CHAINS);
- s = print_chains(table, family, ":%s - [0:0]\n", zone->name,
- zone->src_flags, src_chains, ARRAY_SIZE(src_chains));
+ for (c = zone_chains; c->format; c++)
+ {
+ /* don't touch user chains on selective stop */
+ if (reload && c->flag == FW3_FLAG_CUSTOM_CHAINS)
+ continue;
- d = print_chains(table, family, ":%s - [0:0]\n", zone->name,
- zone->dst_flags, dst_chains, ARRAY_SIZE(dst_chains));
+ if (!fw3_is_family(c, handle->family))
+ continue;
- if (s || d)
+ if (c->table != handle->table)
+ continue;
+
+ if (c->flag &&
+ !fw3_hasbit(zone->flags[handle->family == FW3_FAMILY_V6], c->flag))
+ continue;
+
+ fw3_ipt_create_chain(handle, c->format, zone->name);
+ }
+
+ if (zone->custom_chains)
{
- info(" * Zone '%s'", zone->name);
- fw3_set_running(zone, &state->running_zones);
+ if (handle->table == FW3_TABLE_FILTER)
+ {
+ for (i = 0; i < sizeof(flt_chains)/sizeof(flt_chains[0]); i += 2)
+ {
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_comment(r, "user chain for %s", flt_chains[i+1]);
+ fw3_ipt_rule_target(r, "%s_%s_rule", flt_chains[i+1], zone->name);
+ fw3_ipt_rule_append(r, "zone_%s_%s", zone->name, flt_chains[i]);
+ }
+ }
+ else if (handle->table == FW3_TABLE_NAT)
+ {
+ for (i = 0; i < sizeof(nat_chains)/sizeof(nat_chains[0]); i += 2)
+ {
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_comment(r, "user chain for %s", nat_chains[i+1]);
+ fw3_ipt_rule_target(r, "%s_%s_rule", nat_chains[i+1], zone->name);
+ fw3_ipt_rule_append(r, "zone_%s_%s", zone->name, nat_chains[i]);
+ }
+ }
}
+
+ set(zone->flags, handle->family, handle->table);
}
static void
-print_interface_rule(enum fw3_table table, enum fw3_family family,
- struct fw3_zone *zone, struct fw3_device *dev,
- struct fw3_address *sub, bool disable_notrack)
+print_interface_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ bool reload, struct fw3_zone *zone,
+ struct fw3_device *dev, struct fw3_address *sub)
{
- enum fw3_target t;
+ struct fw3_protocol tcp = { .protocol = 6 };
+ struct fw3_ipt_rule *r;
+ enum fw3_flag t;
+
+ char buf[32];
+
+ int i;
+
+ const char *chains[] = {
+ "input", "INPUT",
+ "output", "OUTPUT",
+ "forward", "FORWARD",
+ };
#define jump_target(t) \
- ((t == FW3_TARGET_REJECT) ? "reject" : fw3_flag_names[t])
+ ((t == FW3_FLAG_REJECT) ? "reject" : fw3_flag_names[t])
- if (table == FW3_TABLE_FILTER)
+ if (handle->table == FW3_TABLE_FILTER)
{
- for (t = FW3_TARGET_ACCEPT; t <= FW3_TARGET_DROP; t++)
+ for (t = FW3_FLAG_ACCEPT; t <= FW3_FLAG_DROP; t++)
{
- if (hasbit(zone->src_flags, t))
+ if (has(zone->flags, handle->family, fw3_to_src_target(t)))
{
- fw3_pr("-A zone_%s_src_%s", zone->name, fw3_flag_names[t]);
- fw3_format_in_out(dev, NULL);
- fw3_format_src_dest(sub, NULL);
- fw3_format_extra(zone->extra_src);
- fw3_pr(" -j %s\n", jump_target(t));
+ r = fw3_ipt_rule_create(handle, NULL, dev, NULL, sub, NULL);
+ fw3_ipt_rule_target(r, jump_target(t));
+ fw3_ipt_rule_extra(r, zone->extra_src);
+
+ if (t == FW3_FLAG_ACCEPT && !state->defaults.drop_invalid)
+ fw3_ipt_rule_extra(r,
+ "-m conntrack --ctstate NEW,UNTRACKED");
+
+ fw3_ipt_rule_replace(r, "zone_%s_src_%s", zone->name,
+ fw3_flag_names[t]);
}
- if (hasbit(zone->dst_flags, t))
+ if (has(zone->flags, handle->family, t))
{
- fw3_pr("-A zone_%s_dest_%s", zone->name, fw3_flag_names[t]);
- fw3_format_in_out(NULL, dev);
- fw3_format_src_dest(NULL, sub);
- fw3_format_extra(zone->extra_dest);
- fw3_pr(" -j %s\n", jump_target(t));
+ if (t == FW3_FLAG_ACCEPT &&
+ zone->masq && !zone->masq_allow_invalid)
+ {
+ r = fw3_ipt_rule_create(handle, NULL, NULL, dev, NULL, sub);
+ fw3_ipt_rule_extra(r, "-m conntrack --ctstate INVALID");
+ fw3_ipt_rule_comment(r, "Prevent NAT leakage");
+ fw3_ipt_rule_target(r, fw3_flag_names[FW3_FLAG_DROP]);
+ fw3_ipt_rule_replace(r, "zone_%s_dest_%s", zone->name,
+ fw3_flag_names[t]);
+ }
+
+ r = fw3_ipt_rule_create(handle, NULL, NULL, dev, NULL, sub);
+ fw3_ipt_rule_target(r, jump_target(t));
+ fw3_ipt_rule_extra(r, zone->extra_dest);
+ fw3_ipt_rule_replace(r, "zone_%s_dest_%s", zone->name,
+ fw3_flag_names[t]);
}
}
- fw3_pr("-A delegate_input");
- fw3_format_in_out(dev, NULL);
- fw3_format_src_dest(sub, NULL);
- fw3_format_extra(zone->extra_src);
- fw3_pr(" -j zone_%s_input\n", zone->name);
-
- fw3_pr("-A delegate_forward");
- fw3_format_in_out(dev, NULL);
- fw3_format_src_dest(sub, NULL);
- fw3_format_extra(zone->extra_src);
- fw3_pr(" -j zone_%s_forward\n", zone->name);
-
- fw3_pr("-A delegate_output");
- fw3_format_in_out(NULL, dev);
- fw3_format_src_dest(NULL, sub);
- fw3_format_extra(zone->extra_dest);
- fw3_pr(" -j zone_%s_output\n", zone->name);
+ for (i = 0; i < sizeof(chains)/sizeof(chains[0]); i += 2)
+ {
+ if (*chains[i] == 'o')
+ r = fw3_ipt_rule_create(handle, NULL, NULL, dev, NULL, sub);
+ else
+ r = fw3_ipt_rule_create(handle, NULL, dev, NULL, sub, NULL);
+
+ fw3_ipt_rule_target(r, "zone_%s_%s", zone->name, chains[i]);
+
+ if (*chains[i] == 'o')
+ fw3_ipt_rule_extra(r, zone->extra_dest);
+ else
+ fw3_ipt_rule_extra(r, zone->extra_src);
+
+ fw3_ipt_rule_replace(r, chains[i + 1]);
+ }
}
- else if (table == FW3_TABLE_NAT)
+ else if (handle->table == FW3_TABLE_NAT)
{
- if (hasbit(zone->dst_flags, FW3_TARGET_DNAT))
+ if (has(zone->flags, handle->family, FW3_FLAG_DNAT))
{
- fw3_pr("-A delegate_prerouting");
- fw3_format_in_out(dev, NULL);
- fw3_format_src_dest(sub, NULL);
- fw3_format_extra(zone->extra_src);
- fw3_pr(" -j zone_%s_prerouting\n", zone->name);
+ r = fw3_ipt_rule_create(handle, NULL, dev, NULL, sub, NULL);
+ fw3_ipt_rule_target(r, "zone_%s_prerouting", zone->name);
+ fw3_ipt_rule_extra(r, zone->extra_src);
+ fw3_ipt_rule_replace(r, "PREROUTING");
}
- if (hasbit(zone->dst_flags, FW3_TARGET_SNAT))
+ if (has(zone->flags, handle->family, FW3_FLAG_SNAT))
{
- fw3_pr("-A delegate_postrouting");
- fw3_format_in_out(NULL, dev);
- fw3_format_src_dest(NULL, sub);
- fw3_format_extra(zone->extra_dest);
- fw3_pr(" -j zone_%s_postrouting\n", zone->name);
+ r = fw3_ipt_rule_create(handle, NULL, NULL, dev, NULL, sub);
+ fw3_ipt_rule_target(r, "zone_%s_postrouting", zone->name);
+ fw3_ipt_rule_extra(r, zone->extra_dest);
+ fw3_ipt_rule_replace(r, "POSTROUTING");
}
}
- else if (table == FW3_TABLE_MANGLE)
+ else if (handle->table == FW3_TABLE_MANGLE)
{
if (zone->mtu_fix)
{
- if (zone->log)
+ if (zone->log & FW3_ZONE_LOG_MANGLE)
{
- fw3_pr("-A mssfix");
- fw3_format_in_out(NULL, dev);
- fw3_format_src_dest(NULL, sub);
- fw3_pr(" -p tcp --tcp-flags SYN,RST SYN");
- fw3_format_limit(&zone->log_limit);
- fw3_format_comment(zone->name, " (mtu_fix logging)");
- fw3_pr(" -j LOG --log-prefix \"MSSFIX(%s): \"\n", zone->name);
+ snprintf(buf, sizeof(buf) - 1, "MSSFIX(%s): ", zone->name);
+
+ r = fw3_ipt_rule_create(handle, &tcp, NULL, dev, NULL, sub);
+ fw3_ipt_rule_addarg(r, false, "--tcp-flags", "SYN,RST");
+ fw3_ipt_rule_addarg(r, false, "SYN", NULL);
+ fw3_ipt_rule_limit(r, &zone->log_limit);
+ fw3_ipt_rule_comment(r, "%s (mtu_fix logging)", zone->name);
+ fw3_ipt_rule_target(r, "LOG");
+ fw3_ipt_rule_addarg(r, false, "--log-prefix", buf);
+ fw3_ipt_rule_replace(r, "FORWARD");
}
- fw3_pr("-A mssfix");
- fw3_format_in_out(NULL, dev);
- fw3_format_src_dest(NULL, sub);
- fw3_pr(" -p tcp --tcp-flags SYN,RST SYN");
- fw3_format_comment(zone->name, " (mtu_fix)");
- fw3_pr(" -j TCPMSS --clamp-mss-to-pmtu\n");
+ r = fw3_ipt_rule_create(handle, &tcp, NULL, dev, NULL, sub);
+ fw3_ipt_rule_addarg(r, false, "--tcp-flags", "SYN,RST");
+ fw3_ipt_rule_addarg(r, false, "SYN", NULL);
+ fw3_ipt_rule_comment(r, "%s (mtu_fix)", zone->name);
+ fw3_ipt_rule_target(r, "TCPMSS");
+ fw3_ipt_rule_addarg(r, false, "--clamp-mss-to-pmtu", NULL);
+ fw3_ipt_rule_replace(r, "FORWARD");
}
}
- else if (table == FW3_TABLE_RAW)
+ else if (handle->table == FW3_TABLE_RAW)
{
- if (!zone->conntrack && !disable_notrack)
+ if (has(zone->flags, handle->family, FW3_FLAG_HELPER))
+ {
+ r = fw3_ipt_rule_create(handle, NULL, dev, NULL, sub, NULL);
+ fw3_ipt_rule_comment(r, "%s CT helper assignment", zone->name);
+ fw3_ipt_rule_target(r, "zone_%s_helper", zone->name);
+ fw3_ipt_rule_extra(r, zone->extra_src);
+ fw3_ipt_rule_replace(r, "PREROUTING");
+ }
+
+ if (has(zone->flags, handle->family, FW3_FLAG_NOTRACK))
{
- fw3_pr("-A notrack");
- fw3_format_in_out(dev, NULL);
- fw3_format_src_dest(sub, NULL);
- fw3_format_extra(zone->extra_src);
- fw3_format_comment(zone->name, " (notrack)");
- fw3_pr(" -j CT --notrack\n", zone->name);
+ r = fw3_ipt_rule_create(handle, NULL, dev, NULL, sub, NULL);
+ fw3_ipt_rule_comment(r, "%s CT bypass", zone->name);
+ fw3_ipt_rule_target(r, "zone_%s_notrack", zone->name);
+ fw3_ipt_rule_extra(r, zone->extra_src);
+ fw3_ipt_rule_replace(r, "PREROUTING");
}
}
}
static void
-print_interface_rules(enum fw3_table table, enum fw3_family family,
- struct fw3_zone *zone, bool disable_notrack)
+print_interface_rules(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ bool reload, struct fw3_zone *zone)
{
struct fw3_device *dev;
struct fw3_address *sub;
fw3_foreach(dev, &zone->devices)
fw3_foreach(sub, &zone->subnets)
{
- if (!fw3_is_family(sub, family))
+ if (!fw3_is_family(sub, handle->family))
continue;
if (!dev && !sub)
continue;
- print_interface_rule(table, family, zone, dev, sub, disable_notrack);
+ print_interface_rule(handle, state, reload, zone, dev, sub);
}
}
+static struct fw3_address *
+next_addr(struct fw3_address *addr, struct list_head *list,
+ enum fw3_family family, bool invert)
+{
+ struct list_head *p;
+ struct fw3_address *rv;
+
+ for (p = addr ? addr->list.next : list->next; p != list; p = p->next)
+ {
+ rv = list_entry(p, struct fw3_address, list);
+
+ if (fw3_is_family(rv, family) && rv->set && rv->invert == invert)
+ return rv;
+ }
+
+ return NULL;
+}
+
static void
-print_zone_rule(enum fw3_table table, enum fw3_family family,
- struct fw3_zone *zone, bool disable_notrack)
+print_zone_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ bool reload, struct fw3_zone *zone)
{
+ bool first_src, first_dest;
struct fw3_address *msrc;
struct fw3_address *mdest;
+ struct fw3_ipt_rule *r;
- enum fw3_target t;
+ enum fw3_flag t;
+ char buf[32];
- if (!fw3_is_family(zone, family))
+ if (!fw3_is_family(zone, handle->family))
return;
- switch (table)
+ info(" * Zone '%s'", zone->name);
+
+ switch (handle->table)
{
case FW3_TABLE_FILTER:
- fw3_pr("-A zone_%s_input -j zone_%s_src_%s\n",
- zone->name, zone->name, fw3_flag_names[zone->policy_input]);
+ if (has(zone->flags, handle->family, FW3_FLAG_DNAT))
+ {
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_extra(r, "-m conntrack --ctstate DNAT");
+ fw3_ipt_rule_comment(r, "Accept port redirections");
+ fw3_ipt_rule_target(r, fw3_flag_names[FW3_FLAG_ACCEPT]);
+ fw3_ipt_rule_append(r, "zone_%s_input", zone->name);
+
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_extra(r, "-m conntrack --ctstate DNAT");
+ fw3_ipt_rule_comment(r, "Accept port forwards");
+ fw3_ipt_rule_target(r, fw3_flag_names[FW3_FLAG_ACCEPT]);
+ fw3_ipt_rule_append(r, "zone_%s_forward", zone->name);
+ }
+
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_target(r, "zone_%s_src_%s", zone->name,
+ fw3_flag_names[zone->policy_input]);
+ fw3_ipt_rule_append(r, "zone_%s_input", zone->name);
- fw3_pr("-A zone_%s_forward -j zone_%s_dest_%s\n",
- zone->name, zone->name, fw3_flag_names[zone->policy_forward]);
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_target(r, "zone_%s_dest_%s", zone->name,
+ fw3_flag_names[zone->policy_forward]);
+ fw3_ipt_rule_append(r, "zone_%s_forward", zone->name);
- fw3_pr("-A zone_%s_output -j zone_%s_dest_%s\n",
- zone->name, zone->name, fw3_flag_names[zone->policy_output]);
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_target(r, "zone_%s_dest_%s", zone->name,
+ fw3_flag_names[zone->policy_output]);
+ fw3_ipt_rule_append(r, "zone_%s_output", zone->name);
- if (zone->log)
+ if (zone->log & FW3_ZONE_LOG_FILTER)
{
- for (t = FW3_TARGET_REJECT; t <= FW3_TARGET_DROP; t++)
+ for (t = FW3_FLAG_REJECT; t <= FW3_FLAG_DROP; t++)
{
- if (hasbit(zone->src_flags, t))
+ if (has(zone->flags, handle->family, fw3_to_src_target(t)))
{
- fw3_pr("-A zone_%s_src_%s", zone->name, fw3_flag_names[t]);
- fw3_format_limit(&zone->log_limit);
- fw3_pr(" -j LOG --log-prefix \"%s(src %s)\"\n",
- fw3_flag_names[t], zone->name);
+ r = fw3_ipt_rule_new(handle);
+
+ snprintf(buf, sizeof(buf) - 1, "%s(src %s)",
+ fw3_flag_names[t], zone->name);
+
+ fw3_ipt_rule_limit(r, &zone->log_limit);
+ fw3_ipt_rule_target(r, "LOG");
+ fw3_ipt_rule_addarg(r, false, "--log-prefix", buf);
+ fw3_ipt_rule_append(r, "zone_%s_src_%s",
+ zone->name, fw3_flag_names[t]);
}
- if (hasbit(zone->dst_flags, t))
+ if (has(zone->flags, handle->family, t))
{
- fw3_pr("-A zone_%s_dest_%s", zone->name, fw3_flag_names[t]);
- fw3_format_limit(&zone->log_limit);
- fw3_pr(" -j LOG --log-prefix \"%s(dest %s)\"\n",
- fw3_flag_names[t], zone->name);
+ r = fw3_ipt_rule_new(handle);
+
+ snprintf(buf, sizeof(buf) - 1, "%s(dest %s)",
+ fw3_flag_names[t], zone->name);
+
+ fw3_ipt_rule_limit(r, &zone->log_limit);
+ fw3_ipt_rule_target(r, "LOG");
+ fw3_ipt_rule_addarg(r, false, "--log-prefix", buf);
+ fw3_ipt_rule_append(r, "zone_%s_dest_%s",
+ zone->name, fw3_flag_names[t]);
}
}
}
break;
case FW3_TABLE_NAT:
- if (zone->masq && family == FW3_FAMILY_V4)
+ if (zone->masq && handle->family == FW3_FAMILY_V4)
{
- fw3_foreach(msrc, &zone->masq_src)
- fw3_foreach(mdest, &zone->masq_dest)
+ /* for any negated masq_src ip, emit -s addr -j RETURN rules */
+ for (msrc = NULL;
+ (msrc = next_addr(msrc, &zone->masq_src,
+ handle->family, true)) != NULL; )
{
- fw3_pr("-A zone_%s_postrouting ", zone->name);
- fw3_format_src_dest(msrc, mdest);
- fw3_pr("-j MASQUERADE\n");
+ msrc->invert = false;
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_src_dest(r, msrc, NULL);
+ fw3_ipt_rule_target(r, "RETURN");
+ fw3_ipt_rule_append(r, "zone_%s_postrouting", zone->name);
+ msrc->invert = true;
+ }
+
+ /* for any negated masq_dest ip, emit -d addr -j RETURN rules */
+ for (mdest = NULL;
+ (mdest = next_addr(mdest, &zone->masq_dest,
+ handle->family, true)) != NULL; )
+ {
+ mdest->invert = false;
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_src_dest(r, NULL, mdest);
+ fw3_ipt_rule_target(r, "RETURN");
+ fw3_ipt_rule_append(r, "zone_%s_postrouting", zone->name);
+ mdest->invert = true;
+ }
+
+ /* emit masquerading entries for non-negated addresses
+ and ensure that both src and dest loops run at least once,
+ even if there are no relevant addresses */
+ for (first_src = true, msrc = NULL;
+ (msrc = next_addr(msrc, &zone->masq_src,
+ handle->family, false)) || first_src;
+ first_src = false)
+ {
+ for (first_dest = true, mdest = NULL;
+ (mdest = next_addr(mdest, &zone->masq_dest,
+ handle->family, false)) || first_dest;
+ first_dest = false)
+ {
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_src_dest(r, msrc, mdest);
+ fw3_ipt_rule_target(r, "MASQUERADE");
+ fw3_ipt_rule_append(r, "zone_%s_postrouting", zone->name);
+ }
}
}
break;
case FW3_TABLE_RAW:
+ fw3_print_cthelpers(handle, state, zone);
+ break;
+
case FW3_TABLE_MANGLE:
break;
}
- print_interface_rules(table, family, zone, disable_notrack);
+ print_interface_rules(handle, state, reload, zone);
}
void
-fw3_print_zone_chains(enum fw3_table table, enum fw3_family family,
- struct fw3_state *state)
+fw3_print_zone_chains(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ bool reload)
{
struct fw3_zone *zone;
list_for_each_entry(zone, &state->zones, list)
- print_zone_chain(table, family, zone, state);
+ print_zone_chain(handle, state, reload, zone);
}
void
-fw3_print_zone_rules(enum fw3_table table, enum fw3_family family,
- struct fw3_state *state)
+fw3_print_zone_rules(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ bool reload)
{
struct fw3_zone *zone;
list_for_each_entry(zone, &state->zones, list)
- print_zone_rule(table, family, zone, state->defaults.drop_invalid);
+ print_zone_rule(handle, state, reload, zone);
}
void
-fw3_flush_zones(enum fw3_table table, enum fw3_family family,
- bool pass2, struct fw3_state *state)
+fw3_flush_zones(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ bool reload)
{
struct fw3_zone *z, *tmp;
- int mask = (1 << FW3_FAMILY_V4) | (1 << FW3_FAMILY_V6);
+ const struct fw3_chain_spec *c;
+ char chain[32];
- list_for_each_entry_safe(z, tmp, &state->running_zones, running_list)
+ list_for_each_entry_safe(z, tmp, &state->zones, list)
{
- if (!hasbit(z->dst_flags, family))
+ if (!has(z->flags, handle->family, handle->table))
continue;
- print_chains(table, family, pass2 ? "-X %s\n" : "-F %s\n",
- z->name, z->src_flags, src_chains, ARRAY_SIZE(src_chains));
+ for (c = zone_chains; c->format; c++)
+ {
+ /* don't touch user chains on selective stop */
+ if (reload && c->flag == FW3_FLAG_CUSTOM_CHAINS)
+ continue;
+
+ if (!fw3_is_family(c, handle->family))
+ continue;
+
+ if (c->table != handle->table)
+ continue;
+
+ if (c->flag && !has(z->flags, handle->family, c->flag))
+ continue;
- print_chains(table, family, pass2 ? "-X %s\n" : "-F %s\n",
- z->name, z->dst_flags, dst_chains, ARRAY_SIZE(dst_chains));
+ snprintf(chain, sizeof(chain), c->format, z->name);
+ fw3_ipt_flush_chain(handle, chain);
- if (pass2)
+ /* keep certain basic chains that do not depend on any settings to
+ avoid purging unrelated user rules pointing to them */
+ if (reload && !c->flag)
+ continue;
+
+ fw3_ipt_delete_chain(handle, chain);
+ }
+
+ del(z->flags, handle->family, handle->table);
+ }
+}
+
+void
+fw3_hotplug_zones(struct fw3_state *state, bool add)
+{
+ struct fw3_zone *z;
+ struct fw3_device *d;
+
+ list_for_each_entry(z, &state->zones, list)
+ {
+ if (add != fw3_hasbit(z->flags[0], FW3_FLAG_HOTPLUG))
{
- delbit(z->dst_flags, family);
+ list_for_each_entry(d, &z->devices, list)
+ fw3_hotplug(add, z, d);
- if (!(z->dst_flags & mask))
- fw3_set_running(z, NULL);
+ if (add)
+ fw3_setbit(z->flags[0], FW3_FLAG_HOTPLUG);
+ else
+ fw3_delbit(z->flags[0], FW3_FLAG_HOTPLUG);
}
}
}
struct fw3_zone *
-fw3_lookup_zone(struct fw3_state *state, const char *name, bool running)
+fw3_lookup_zone(struct fw3_state *state, const char *name)
{
struct fw3_zone *z;
if (strcmp(z->name, name))
continue;
- if (!running || z->running_list.next)
- return z;
-
- break;
+ return z;
}
return NULL;
}
+
+struct list_head *
+fw3_resolve_zone_addresses(struct fw3_zone *zone, struct fw3_address *addr)
+{
+ struct fw3_device *net;
+ struct fw3_address *cur, *tmp;
+ struct list_head *all;
+
+ all = calloc(1, sizeof(*all));
+ if (!all)
+ return NULL;
+
+ INIT_LIST_HEAD(all);
+
+ if (addr && addr->set)
+ {
+ tmp = malloc(sizeof(*tmp));
+
+ if (tmp)
+ {
+ *tmp = *addr;
+ list_add_tail(&tmp->list, all);
+ }
+ }
+ else
+ {
+ list_for_each_entry(net, &zone->networks, list)
+ fw3_ubus_address(all, net->name);
+
+ list_for_each_entry(cur, &zone->subnets, list)
+ {
+ tmp = malloc(sizeof(*tmp));
+
+ if (!tmp)
+ continue;
+
+ *tmp = *cur;
+ list_add_tail(&tmp->list, all);
+ }
+ }
+
+ return all;
+}
projects / project / firewall3.git / blobdiff