redirects: respect src_dip option for reflection rules
[project/firewall3.git] / zones.c
diff --git a/zones.c b/zones.c
index e3ec4ab..2ddd7b4 100644 (file)
--- a/zones.c
+++ b/zones.c
 #include "ubus.h"
 
 
-#define C(f, tbl, tgt, name) \
-       { FW3_FAMILY_##f, FW3_TABLE_##tbl, FW3_TARGET_##tgt, name }
-
-struct chain {
-       enum fw3_family family;
-       enum fw3_table table;
-       enum fw3_target target;
-       const char *name;
-};
-
-static const struct chain src_chains[] = {
-       C(ANY, FILTER, UNSPEC,  "zone_%1$s_input"),
-       C(ANY, FILTER, UNSPEC,  "zone_%1$s_output"),
-       C(ANY, FILTER, UNSPEC,  "zone_%1$s_forward"),
-
-       C(ANY, FILTER, SRC_ACCEPT, "zone_%1$s_src_ACCEPT"),
-       C(ANY, FILTER, SRC_REJECT, "zone_%1$s_src_REJECT"),
-       C(ANY, FILTER, SRC_DROP,   "zone_%1$s_src_DROP"),
-};
+#define C(f, tbl, tgt, fmt) \
+       { FW3_FAMILY_##f, FW3_TABLE_##tbl, FW3_FLAG_##tgt, fmt }
 
-static const struct chain dst_chains[] = {
-       C(ANY, FILTER, ACCEPT,  "zone_%1$s_dest_ACCEPT"),
-       C(ANY, FILTER, REJECT,  "zone_%1$s_dest_REJECT"),
-       C(ANY, FILTER, DROP,    "zone_%1$s_dest_DROP"),
+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"),
 
-       C(V4,  NAT,    SNAT,    "zone_%1$s_postrouting"),
-       C(V4,  NAT,    DNAT,    "zone_%1$s_prerouting"),
+       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, CUSTOM_CNS_V4, "input_%1$s_rule"),
-       C(ANY, FILTER, CUSTOM_CNS_V4, "output_%1$s_rule"),
-       C(ANY, FILTER, CUSTOM_CNS_V4, "forwarding_%1$s_rule"),
-       C(ANY, FILTER, CUSTOM_CNS_V6, "input_%1$s_rule"),
-       C(ANY, FILTER, CUSTOM_CNS_V6, "output_%1$s_rule"),
-       C(ANY, FILTER, CUSTOM_CNS_V6, "forwarding_%1$s_rule"),
+       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,    CUSTOM_CNS_V4, "prerouting_%1$s_rule"),
-       C(V4,  NAT,    CUSTOM_CNS_V4, "postrouting_%1$s_rule"),
-};
+       C(V4,  NAT,    SNAT,          "zone_%s_postrouting"),
+       C(V4,  NAT,    DNAT,          "zone_%s_prerouting"),
 
+       C(ANY, RAW,    NOTRACK,       "zone_%s_notrack"),
 
-#define R(dir1, dir2) \
-       "zone_%1$s_" #dir1 " -m comment --comment \"user chain for %1$s " \
-       #dir2 "\" -j " #dir2 "_%1$s_rule"
+       C(ANY, FILTER, CUSTOM_CHAINS, "input_%s_rule"),
+       C(ANY, FILTER, CUSTOM_CHAINS, "output_%s_rule"),
+       C(ANY, FILTER, CUSTOM_CHAINS, "forwarding_%s_rule"),
 
-static const struct chain def_rules[] = {
-       C(ANY, FILTER, CUSTOM_CNS_V4, R(input, input)),
-       C(ANY, FILTER, CUSTOM_CNS_V4, R(output, output)),
-       C(ANY, FILTER, CUSTOM_CNS_V4, R(forward, forwarding)),
-       C(ANY, FILTER, CUSTOM_CNS_V6, R(input, input)),
-       C(ANY, FILTER, CUSTOM_CNS_V6, R(output, output)),
-       C(ANY, FILTER, CUSTOM_CNS_V6, R(forward, forwarding)),
+       C(V4,  NAT,    CUSTOM_CHAINS, "prerouting_%s_rule"),
+       C(V4,  NAT,    CUSTOM_CHAINS, "postrouting_%s_rule"),
 
-       C(V4,  NAT,    CUSTOM_CNS_V4, R(prerouting, prerouting)),
-       C(V4,  NAT,    CUSTOM_CNS_V4, R(postrouting, postrouting)),
+       { }
 };
 
 const struct fw3_option fw3_zone_opts[] = {
@@ -84,15 +59,15 @@ const struct fw3_option fw3_zone_opts[] = {
 
        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_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),
@@ -105,49 +80,25 @@ const struct fw3_option fw3_zone_opts[] = {
        FW3_OPT("log",                 bool,     zone,     log),
        FW3_OPT("log_limit",           limit,    zone,     log_limit),
 
-       { }
-};
+       FW3_OPT("__flags_v4",          int,      zone,     flags[0]),
+       FW3_OPT("__flags_v6",          int,      zone,     flags[1]),
 
+       FW3_LIST("__addrs",            address,  zone,     old_addrs),
 
-static bool
-print_chains(enum fw3_table table, enum fw3_family family,
-             const char *fmt, const char *name, uint32_t targets,
-             const struct chain *chains, int n)
-{
-       bool rv = false;
-       char cn[256] = { 0 };
-       const struct chain *c;
-
-       for (c = chains; n > 0; c++, n--)
-       {
-               if (!fw3_is_family(c, family))
-                       continue;
-
-               if (c->table != table)
-                       continue;
-
-               if ((c->target != FW3_TARGET_UNSPEC) && !hasbit(targets, c->target))
-                       continue;
-
-               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;
@@ -169,6 +120,7 @@ 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);
        }
 }
@@ -178,19 +130,18 @@ 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->old_addrs);
+
        zone->enabled = true;
        zone->custom_chains = true;
        zone->log_limit.rate = 10;
@@ -241,6 +192,16 @@ fw3_load_zones(struct fw3_state *state, struct uci_package *p)
                        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)
                {
@@ -255,19 +216,23 @@ fw3_load_zones(struct fw3_state *state, struct uci_package *p)
 
                if (zone->masq)
                {
-                       setbit(zone->dst_flags, FW3_TARGET_SNAT);
+                       setbit(zone->flags[0], FW3_FLAG_SNAT);
                        zone->conntrack = true;
                }
 
                if (zone->custom_chains)
                {
-                       setbit(zone->dst_flags, FW3_TARGET_SNAT);
-                       setbit(zone->dst_flags, FW3_TARGET_DNAT);
+                       setbit(zone->flags[0], FW3_FLAG_SNAT);
+                       setbit(zone->flags[0], FW3_FLAG_DNAT);
                }
 
-               setbit(zone->dst_flags, fw3_to_src_target(zone->policy_input));
-               setbit(zone->dst_flags, zone->policy_output);
-               setbit(zone->dst_flags, zone->policy_forward);
+               setbit(zone->flags[0], fw3_to_src_target(zone->policy_input));
+               setbit(zone->flags[0], zone->policy_forward);
+               setbit(zone->flags[0], zone->policy_output);
+
+               setbit(zone->flags[1], fw3_to_src_target(zone->policy_input));
+               setbit(zone->flags[1], zone->policy_forward);
+               setbit(zone->flags[1], zone->policy_output);
 
                list_add_tail(&zone->list, &state->zones);
        }
@@ -275,160 +240,205 @@ fw3_load_zones(struct fw3_state *state, struct uci_package *p)
 
 
 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, r;
-       enum fw3_target f;
-       uint32_t custom_mask = ~0;
-
-       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);
+       info("   * Zone '%s'", zone->name);
 
-       /* user chains already loaded, don't create again */
-       for (f = FW3_TARGET_CUSTOM_CNS_V4; f <= FW3_TARGET_CUSTOM_CNS_V6; f++)
-               if (hasbit(zone->running_dst_flags, f))
-                       delbit(custom_mask, f);
+       set(zone->flags, handle->family, handle->table);
 
        if (zone->custom_chains)
-               setbit(zone->dst_flags, (family == FW3_FAMILY_V4) ?
-                      FW3_TARGET_CUSTOM_CNS_V4 : FW3_TARGET_CUSTOM_CNS_V6);
+               set(zone->flags, handle->family, FW3_FLAG_CUSTOM_CHAINS);
 
        if (!zone->conntrack && !state->defaults.drop_invalid)
-               setbit(zone->dst_flags, FW3_TARGET_NOTRACK);
+               set(zone->flags, handle->family, FW3_FLAG_NOTRACK);
+
+       for (c = zone_chains; c->format; c++)
+       {
+               /* don't touch user chains on selective stop */
+               if (reload && c->flag == FW3_FLAG_CUSTOM_CHAINS)
+                       continue;
 
-       s = print_chains(table, family, ":%s - [0:0]\n", zone->name,
-                        zone->dst_flags,
-                        src_chains, ARRAY_SIZE(src_chains));
+               if (!fw3_is_family(c, handle->family))
+                       continue;
 
-       d = print_chains(table, family, ":%s - [0:0]\n", zone->name,
-                        zone->dst_flags & custom_mask,
-                        dst_chains, ARRAY_SIZE(dst_chains));
+               if (c->table != handle->table)
+                       continue;
 
-       r = print_chains(table, family, "-A %s\n", zone->name,
-                        zone->dst_flags,
-                        def_rules, ARRAY_SIZE(def_rules));
+               if (c->flag &&
+                   !hasbit(zone->flags[handle->family == FW3_FAMILY_V6], c->flag))
+                       continue;
 
-       if (s || d || r)
+               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",
+               "output",
+               "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->dst_flags, fw3_to_src_target(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);
+                               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));
+                               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++)
+               {
+                       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, "delegate_%s", chains[i]);
+               }
        }
-       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, "delegate_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, "delegate_postrouting");
                }
        }
-       else if (table == FW3_TABLE_MANGLE)
+       else if (handle->table == FW3_TABLE_MANGLE)
        {
                if (zone->mtu_fix)
                {
                        if (zone->log)
                        {
-                               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, "mssfix");
                        }
 
-                       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, "mssfix");
                }
        }
-       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_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_target(r, "zone_%s_notrack", zone->name);
+                       fw3_ipt_rule_extra(r, zone->extra_src);
+                       fw3_ipt_rule_replace(r, "delegate_notrack");
                }
        }
 }
 
 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;
@@ -436,144 +446,220 @@ print_interface_rules(enum fw3_table table, enum fw3_family family,
        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 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 disable_notrack = state->defaults.drop_invalid;
        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)
+       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)
                {
-                       for (t = FW3_TARGET_REJECT; t <= FW3_TARGET_DROP; t++)
+                       for (t = FW3_FLAG_REJECT; t <= FW3_FLAG_DROP; t++)
                        {
-                               if (hasbit(zone->dst_flags, fw3_to_src_target(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)
                        {
-                               fw3_pr("-A zone_%s_postrouting ", zone->name);
-                               fw3_format_src_dest(msrc, mdest);
-                               fw3_pr("-j MASQUERADE\n");
+                               if (!fw3_is_family(msrc, handle->family) ||
+                                   !fw3_is_family(mdest, handle->family))
+                                       continue;
+
+                               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:
+               if (!zone->conntrack && !disable_notrack)
+               {
+                       r = fw3_ipt_rule_new(handle);
+                       fw3_ipt_rule_target(r, "CT");
+                       fw3_ipt_rule_addarg(r, false, "--notrack", NULL);
+                       fw3_ipt_rule_append(r, "zone_%s_notrack", zone->name);
+               }
+               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, bool reload, struct fw3_state *state)
+fw3_flush_zones(struct fw3_ipt_handle *handle, struct fw3_state *state,
+                bool reload)
 {
        struct fw3_zone *z, *tmp;
-       uint32_t custom_mask = ~0;
-       uint32_t family_mask = (1 << FW3_FAMILY_V4) | (1 << FW3_FAMILY_V6);
-
-       /* don't touch user chains on selective stop */
-       if (reload)
-       {
-               delbit(custom_mask, FW3_TARGET_CUSTOM_CNS_V4);
-               delbit(custom_mask, FW3_TARGET_CUSTOM_CNS_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->running_dst_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;
+
+                       snprintf(chain, sizeof(chain), c->format, z->name);
+                       fw3_ipt_flush_chain(handle, chain);
+
+                       /* 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);
+       }
+}
 
-               print_chains(table, family, pass2 ? "-X %s\n" : "-F %s\n",
-                            z->name, z->running_dst_flags & custom_mask,
-                            dst_chains, ARRAY_SIZE(dst_chains));
+void
+fw3_hotplug_zones(struct fw3_state *state, bool add)
+{
+       struct fw3_zone *z;
+       struct fw3_device *d;
 
-               if (pass2)
+       list_for_each_entry(z, &state->zones, list)
+       {
+               if (add != 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 & family_mask))
-                               fw3_set_running(z, NULL);
+                       if (add)
+                               setbit(z->flags[0], FW3_FLAG_HOTPLUG);
+                       else
+                               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;
 
@@ -585,11 +671,51 @@ fw3_lookup_zone(struct fw3_state *state, const char *name, bool running)
                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;
+}