ENDIF()
ADD_EXECUTABLE(firewall3 main.c options.c defaults.c zones.c forwards.c rules.c redirects.c utils.c ubus.c ipsets.c includes.c iptables.c)
-TARGET_LINK_LIBRARIES(firewall3 uci ubox ubus ip4tc ip6tc)
+TARGET_LINK_LIBRARIES(firewall3 uci ubox ubus ip4tc ip6tc xtables m ${CMAKE_SOURCE_DIR}/libext.a ${CMAKE_SOURCE_DIR}/libext4.a ${CMAKE_SOURCE_DIR}/libext6.a)
SET(CMAKE_INSTALL_PREFIX /usr)
{ }
};
-static const struct fw3_rule_spec toplevel_rules[] = {
- C(ANY, FILTER, UNSPEC, "INPUT -j delegate_input"),
- C(ANY, FILTER, UNSPEC, "OUTPUT -j delegate_output"),
- C(ANY, FILTER, UNSPEC, "FORWARD -j delegate_forward"),
-
- C(V4, NAT, UNSPEC, "PREROUTING -j delegate_prerouting"),
- C(V4, NAT, UNSPEC, "POSTROUTING -j delegate_postrouting"),
-
- C(ANY, MANGLE, UNSPEC, "FORWARD -j mssfix"),
- C(ANY, MANGLE, UNSPEC, "PREROUTING -j fwmark"),
-
- C(ANY, RAW, UNSPEC, "PREROUTING -j notrack"),
-
- { }
-};
-
const struct fw3_option fw3_flag_opts[] = {
FW3_OPT("input", target, defaults, policy_input),
FW3_OPT("forward", target, defaults, policy_forward),
}
void
-fw3_print_default_chains(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload)
+fw3_print_default_chains(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ bool reload)
{
- bool rv;
struct fw3_defaults *defs = &state->defaults;
- uint32_t custom_mask = ~0;
+ const struct fw3_rule_spec *c;
#define policy(t) \
- ((t == FW3_FLAG_REJECT) ? "DROP" : fw3_flag_names[t])
+ ((t == FW3_FLAG_REJECT) ? FW3_FLAG_DROP : t)
- if (family == FW3_FAMILY_V6 && defs->disable_ipv6)
+ if (handle->family == FW3_FAMILY_V6 && defs->disable_ipv6)
return;
- if (table == FW3_TABLE_FILTER)
+ if (handle->table == FW3_TABLE_FILTER)
{
- fw3_pr(":INPUT %s [0:0]\n", policy(defs->policy_input));
- fw3_pr(":FORWARD %s [0:0]\n", policy(defs->policy_forward));
- fw3_pr(":OUTPUT %s [0:0]\n", policy(defs->policy_output));
+ fw3_ipt_set_policy(handle, "INPUT", policy(defs->policy_input));
+ fw3_ipt_set_policy(handle, "OUTPUT", policy(defs->policy_output));
+ fw3_ipt_set_policy(handle, "FORWARD", policy(defs->policy_forward));
}
- /* Don't touch user chains on reload */
- if (reload)
- delbit(custom_mask, FW3_FLAG_CUSTOM_CHAINS);
-
if (defs->custom_chains)
- set(defs->flags, family, FW3_FLAG_CUSTOM_CHAINS);
+ set(defs->flags, handle->family, FW3_FLAG_CUSTOM_CHAINS);
if (defs->syn_flood)
- set(defs->flags, family, FW3_FLAG_SYN_FLOOD);
+ set(defs->flags, handle->family, FW3_FLAG_SYN_FLOOD);
+
+ for (c = default_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;
- rv = fw3_pr_rulespec(table, family, defs->flags, custom_mask,
- default_chains, ":%s - [0:0]\n");
+ if (c->flag &&
+ !hasbit(defs->flags[handle->family == FW3_FAMILY_V6], c->flag))
+ continue;
+
+ fw3_ipt_create_chain(handle, c->format);
+ }
- if (rv)
- set(defs->flags, family, table);
+ set(defs->flags, handle->family, handle->table);
}
+
+struct toplevel_rule {
+ enum fw3_table table;
+ const char *chain;
+ const char *target;
+};
+
void
-fw3_print_default_head_rules(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload)
+fw3_print_default_head_rules(struct fw3_ipt_handle *handle,
+ struct fw3_state *state, bool reload)
{
int i;
struct fw3_defaults *defs = &state->defaults;
+ struct fw3_device lodev = { .set = true };
+ struct fw3_protocol tcp = { .protocol = 6 };
+ struct fw3_ipt_rule *r;
+ struct toplevel_rule *tr;
+
const char *chains[] = {
- "input", "input",
- "output", "output",
- "forward", "forwarding",
+ "delegate_input", "input",
+ "delegate_output", "output",
+ "delegate_forward", "forwarding",
};
- fw3_pr_rulespec(table, family, NULL, 0, toplevel_rules, "-A %s\n");
+ struct toplevel_rule rules[] = {
+ { FW3_TABLE_FILTER, "INPUT", "delegate_input" },
+ { FW3_TABLE_FILTER, "OUTPUT", "delegate_output" },
+ { FW3_TABLE_FILTER, "FORWARD", "delegate_forward" },
+
+ { FW3_TABLE_NAT, "PREROUTING", "delegate_prerouting" },
+ { FW3_TABLE_NAT, "POSTROUTING", "delegate_postrouting" },
+
+ { FW3_TABLE_MANGLE, "FORWARD", "mssfix" },
+ { FW3_TABLE_MANGLE, "PREROUTING", "fwmark" },
+
+ { FW3_TABLE_RAW, "PREROUTING", "notrack" },
+
+ { 0, NULL },
+ };
- switch (table)
+ for (tr = rules; tr->chain; tr++)
+ {
+ if (tr->table != handle->table)
+ continue;
+
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_target(r, tr->target);
+ fw3_ipt_rule_append(r, tr->chain);
+ }
+
+ switch (handle->table)
{
case FW3_TABLE_FILTER:
- fw3_pr("-A delegate_input -i lo -j ACCEPT\n");
- fw3_pr("-A delegate_output -o lo -j ACCEPT\n");
+
+ sprintf(lodev.name, "lo");
+
+ r = fw3_ipt_rule_create(handle, NULL, &lodev, NULL, NULL, NULL);
+ fw3_ipt_rule_target(r, "ACCEPT");
+ fw3_ipt_rule_append(r, "delegate_input");
+
+ r = fw3_ipt_rule_create(handle, NULL, NULL, &lodev, NULL, NULL);
+ fw3_ipt_rule_target(r, "ACCEPT");
+ fw3_ipt_rule_append(r, "delegate_output");
if (defs->custom_chains)
{
for (i = 0; i < ARRAY_SIZE(chains); i += 2)
{
- fw3_pr("-A delegate_%s -m comment "
- "--comment \"user chain for %s\" -j %s_rule\n",
- chains[i], chains[i+1], chains[i+1]);
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_comment(r, "user chain for %s", chains[i+1]);
+ fw3_ipt_rule_target(r, chains[i+1]);
+ fw3_ipt_rule_append(r, chains[i]);
}
}
for (i = 0; i < ARRAY_SIZE(chains); i += 2)
{
- fw3_pr("-A delegate_%s -m conntrack --ctstate RELATED,ESTABLISHED "
- "-j ACCEPT\n", chains[i]);
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_extra(r, "-m conntrack --ctstate RELATED,ESTABLISHED");
+ fw3_ipt_rule_target(r, "ACCEPT");
+ fw3_ipt_rule_append(r, chains[i]);
if (defs->drop_invalid)
{
- fw3_pr("-A delegate_%s -m conntrack --ctstate INVALID -j DROP\n",
- chains[i]);
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_extra(r, "-m conntrack --ctstate INVALID");
+ fw3_ipt_rule_target(r, "DROP");
+ fw3_ipt_rule_append(r, chains[i]);
}
}
if (defs->syn_flood)
{
- fw3_pr("-A syn_flood -p tcp --syn");
- fw3_format_limit(&defs->syn_flood_rate);
- fw3_pr(" -j RETURN\n");
-
- fw3_pr("-A syn_flood -j DROP\n");
- fw3_pr("-A delegate_input -p tcp --syn -j syn_flood\n");
+ r = fw3_ipt_rule_create(handle, &tcp, NULL, NULL, NULL, NULL);
+ fw3_ipt_rule_extra(r, "--syn");
+ fw3_ipt_rule_limit(r, &defs->syn_flood_rate);
+ fw3_ipt_rule_target(r, "RETURN");
+ fw3_ipt_rule_append(r, "syn_flood");
+
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_target(r, "DROP");
+ fw3_ipt_rule_append(r, "syn_flood");
+
+ r = fw3_ipt_rule_create(handle, &tcp, NULL, NULL, NULL, NULL);
+ fw3_ipt_rule_extra(r, "--syn");
+ fw3_ipt_rule_target(r, "syn_flood");
+ fw3_ipt_rule_append(r, "delegate_input");
}
- fw3_pr("-A reject -p tcp -j REJECT --reject-with tcp-reset\n");
- fw3_pr("-A reject -j REJECT --reject-with port-unreach\n");
+ r = fw3_ipt_rule_create(handle, &tcp, NULL, NULL, NULL, NULL);
+ fw3_ipt_rule_target(r, "REJECT");
+ fw3_ipt_rule_addarg(r, false, "--reject-with", "tcp-reset");
+ fw3_ipt_rule_append(r, "reject");
+
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_target(r, "REJECT");
+ fw3_ipt_rule_addarg(r, false, "--reject-with", "port-unreach");
+ fw3_ipt_rule_append(r, "reject");
break;
case FW3_TABLE_NAT:
if (defs->custom_chains)
{
- fw3_pr("-A delegate_prerouting "
- "-m comment --comment \"user chain for prerouting\" "
- "-j prerouting_rule\n");
-
- fw3_pr("-A delegate_postrouting "
- "-m comment --comment \"user chain for postrouting\" "
- "-j postrouting_rule\n");
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_comment(r, "user chain for prerouting");
+ fw3_ipt_rule_target(r, "prerouting_rule");
+ fw3_ipt_rule_append(r, "delegate_prerouting");
+
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_comment(r, "user chain for postrouting");
+ fw3_ipt_rule_target(r, "postrouting_rule");
+ fw3_ipt_rule_append(r, "delegate_postrouting");
}
break;
}
void
-fw3_print_default_tail_rules(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload)
+fw3_print_default_tail_rules(struct fw3_ipt_handle *handle,
+ struct fw3_state *state, bool reload)
{
struct fw3_defaults *defs = &state->defaults;
+ struct fw3_ipt_rule *r;
- if (table != FW3_TABLE_FILTER)
+ if (handle->table != FW3_TABLE_FILTER)
return;
if (defs->policy_input == FW3_FLAG_REJECT)
- fw3_pr("-A delegate_input -j reject\n");
+ {
+ r = fw3_ipt_rule_new(handle);
+
+ if (!r)
+ return;
+
+ fw3_ipt_rule_target(r, "reject");
+ fw3_ipt_rule_append(r, "delegate_input");
+ }
if (defs->policy_output == FW3_FLAG_REJECT)
- fw3_pr("-A delegate_output -j reject\n");
+ {
+ r = fw3_ipt_rule_new(handle);
+
+ if (!r)
+ return;
+
+ fw3_ipt_rule_target(r, "reject");
+ fw3_ipt_rule_append(r, "delegate_output");
+ }
if (defs->policy_forward == FW3_FLAG_REJECT)
- fw3_pr("-A delegate_forward -j reject\n");
+ {
+ r = fw3_ipt_rule_new(handle);
+
+ if (!r)
+ return;
+
+ fw3_ipt_rule_target(r, "reject");
+ fw3_ipt_rule_append(r, "delegate_forward");
+ }
}
static void
fw3_flush_rules(struct fw3_ipt_handle *handle, struct fw3_state *state,
bool reload)
{
+ enum fw3_flag policy = reload ? FW3_FLAG_DROP : FW3_FLAG_ACCEPT;
struct fw3_defaults *defs = &state->defaults;
const struct fw3_rule_spec *c;
if (!has(defs->flags, handle->family, handle->table))
return;
+ if (handle->table == FW3_TABLE_FILTER)
+ {
+ fw3_ipt_set_policy(handle, "INPUT", policy);
+ fw3_ipt_set_policy(handle, "OUTPUT", policy);
+ fw3_ipt_set_policy(handle, "FORWARD", policy);
+ }
+
for (c = default_chains; c->format; c++)
{
/* don't touch user chains on selective stop */
- if (reload && hasbit(c->flag, FW3_FLAG_CUSTOM_CHAINS))
+ if (reload && c->flag == FW3_FLAG_CUSTOM_CHAINS)
continue;
if (!fw3_is_family(c, handle->family))
if (c->table != handle->table)
continue;
- fw3_ipt_set_policy(handle, reload ? FW3_FLAG_DROP : FW3_FLAG_ACCEPT);
+ if (c->flag &&
+ !hasbit(defs->flags[handle->family == FW3_FAMILY_V6], c->flag))
+ continue;
+
fw3_ipt_delete_rules(handle, c->format);
fw3_ipt_delete_chain(handle, c->format);
}
void
fw3_flush_all(struct fw3_ipt_handle *handle)
{
- fw3_ipt_set_policy(handle, FW3_FLAG_ACCEPT);
+ if (handle->table == FW3_TABLE_FILTER)
+ {
+ fw3_ipt_set_policy(handle, "INPUT", FW3_FLAG_ACCEPT);
+ fw3_ipt_set_policy(handle, "OUTPUT", FW3_FLAG_ACCEPT);
+ fw3_ipt_set_policy(handle, "FORWARD", FW3_FLAG_ACCEPT);
+ }
+
fw3_ipt_flush(handle);
}
void fw3_load_defaults(struct fw3_state *state, struct uci_package *p);
-void fw3_print_default_chains(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload);
+void fw3_print_default_chains(struct fw3_ipt_handle *handle,
+ struct fw3_state *state, bool reload);
-void fw3_print_default_head_rules(struct fw3_state *state,
- enum fw3_family family, enum fw3_table table,
- bool reload);
+void fw3_print_default_head_rules(struct fw3_ipt_handle *handle,
+ struct fw3_state *state, bool reload);
-void fw3_print_default_tail_rules(struct fw3_state *state,
- enum fw3_family family, enum fw3_table table,
- bool reload);
+void fw3_print_default_tail_rules(struct fw3_ipt_handle *handle,
+ struct fw3_state *state, bool reload);
void fw3_set_defaults(struct fw3_state *state);
static void
-print_chain(struct fw3_forward *forward)
+append_chain(struct fw3_ipt_rule *r, struct fw3_forward *forward)
{
if (forward->src.any || !forward->src.set)
- fw3_pr("-A delegate_forward");
+ fw3_ipt_rule_append(r, "delegate_forward");
else
- fw3_pr("-A zone_%s_forward", forward->src.name);
+ fw3_ipt_rule_append(r, "zone_%s_forward", forward->src.name);
}
-static void print_target(struct fw3_forward *forward)
+static void set_target(struct fw3_ipt_rule *r, struct fw3_forward *forward)
{
if (forward->dest.any || !forward->dest.set)
- fw3_pr(" -j ACCEPT\n");
+ fw3_ipt_rule_target(r, "ACCEPT");
else
- fw3_pr(" -j zone_%s_dest_ACCEPT\n", forward->dest.name);
+ fw3_ipt_rule_target(r, "zone_%s_dest_ACCEPT", forward->dest.name);
}
static void
-print_forward(struct fw3_forward *forward, enum fw3_family family,
- enum fw3_table table)
+print_forward(struct fw3_ipt_handle *handle, struct fw3_forward *forward)
{
const char *s, *d;
+ struct fw3_ipt_rule *r;
- if (table != FW3_TABLE_FILTER)
+ if (handle->table != FW3_TABLE_FILTER)
return;
- if (!fw3_is_family(forward, family))
+ if (!fw3_is_family(forward, handle->family))
return;
s = forward->_src ? forward->_src->name : "*";
info(" * Forward '%s' -> '%s'", s, d);
- if (!fw3_is_family(forward->_src, family) ||
- !fw3_is_family(forward->_dest, family))
+ if (!fw3_is_family(forward->_src, handle->family) ||
+ !fw3_is_family(forward->_dest, handle->family))
{
info(" ! Skipping due to different family of zone");
return;
}
- print_chain(forward);
- fw3_format_comment("forwarding ", s, "->", d);
- print_target(forward);
+ r = fw3_ipt_rule_new(handle);
+ fw3_ipt_rule_comment(r, "forwarding %s -> %s", s, d);
+ set_target(r, forward);
+ append_chain(r, forward);
}
void
-fw3_print_forwards(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table)
+fw3_print_forwards(struct fw3_ipt_handle *handle, struct fw3_state *state)
{
struct fw3_forward *forward;
list_for_each_entry(forward, &state->forwards, list)
- print_forward(forward, family, table);
+ print_forward(handle, forward);
}
#include "options.h"
#include "zones.h"
#include "utils.h"
+#include "iptables.h"
extern const struct fw3_option fw3_forward_opts[];
void fw3_load_forwards(struct fw3_state *state, struct uci_package *p);
-void fw3_print_forwards(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table);
+void fw3_print_forwards(struct fw3_ipt_handle *handle, struct fw3_state *state);
#define fw3_free_forward(forward) \
fw3_free_object(forward, fw3_forward_opts)
#include "iptables.h"
+static struct option base_opts[] = {
+ { .name = "match", .has_arg = 1, .val = 'm' },
+ { .name = "jump", .has_arg = 1, .val = 'j' },
+ { .name = "append", .has_arg = 1, .val = 'A' },
+ { NULL }
+};
+
+static struct xtables_globals xtg = {
+ .option_offset = 0,
+ .program_version = "4",
+ .orig_opts = base_opts,
+};
+
+static struct xtables_globals xtg6 = {
+ .option_offset = 0,
+ .program_version = "6",
+ .orig_opts = base_opts,
+};
+
+/* Required by certain extensions like SNAT and DNAT */
+int kernel_version;
+
+void
+get_kernel_version(void)
+{
+ static struct utsname uts;
+ int x = 0, y = 0, z = 0;
+
+ if (uname(&uts) == -1)
+ sprintf(uts.release, "3.0.0");
+
+ sscanf(uts.release, "%d.%d.%d", &x, &y, &z);
+ kernel_version = LINUX_VERSION(x, y, z);
+}
+
struct fw3_ipt_handle *
fw3_ipt_open(enum fw3_family family, enum fw3_table table)
{
struct fw3_ipt_handle *h;
- h = malloc(sizeof(*h));
+ h = fw3_alloc(sizeof(*h));
- if (!h)
- return NULL;
+ xtables_init();
if (family == FW3_FAMILY_V6)
{
h->family = FW3_FAMILY_V6;
h->table = table;
h->handle = ip6tc_init(fw3_flag_names[table]);
+
+ xtables_set_params(&xtg6);
+ xtables_set_nfproto(NFPROTO_IPV6);
}
else
{
h->family = FW3_FAMILY_V4;
h->table = table;
h->handle = iptc_init(fw3_flag_names[table]);
+
+ xtables_set_params(&xtg);
+ xtables_set_nfproto(NFPROTO_IPV4);
}
if (!h->handle)
return NULL;
}
+ xtables_pending_matches = NULL;
+ xtables_pending_targets = NULL;
+
+ xtables_matches = NULL;
+ xtables_targets = NULL;
+
+ init_extensions();
+ init_extensions4();
+ init_extensions6();
+
return h;
}
-void fw3_ipt_set_policy(struct fw3_ipt_handle *h, enum fw3_flag policy)
+void
+fw3_ipt_set_policy(struct fw3_ipt_handle *h, const char *chain,
+ enum fw3_flag policy)
{
- if (h->table != FW3_TABLE_FILTER)
- return;
-
if (h->family == FW3_FAMILY_V6)
- {
- ip6tc_set_policy("INPUT", fw3_flag_names[policy], NULL, h->handle);
- ip6tc_set_policy("OUTPUT", fw3_flag_names[policy], NULL, h->handle);
- ip6tc_set_policy("FORWARD", fw3_flag_names[policy], NULL, h->handle);
- }
+ ip6tc_set_policy(chain, fw3_flag_names[policy], NULL, h->handle);
else
- {
- iptc_set_policy("INPUT", fw3_flag_names[policy], NULL, h->handle);
- iptc_set_policy("OUTPUT", fw3_flag_names[policy], NULL, h->handle);
- iptc_set_policy("FORWARD", fw3_flag_names[policy], NULL, h->handle);
- }
+ iptc_set_policy(chain, fw3_flag_names[policy], NULL, h->handle);
}
-void fw3_ipt_delete_chain(struct fw3_ipt_handle *h, const char *chain)
+void
+fw3_ipt_delete_chain(struct fw3_ipt_handle *h, const char *chain)
{
+ if (fw3_pr_debug)
+ {
+ printf("-F %s\n", chain);
+ printf("-X %s\n", chain);
+ }
+
if (h->family == FW3_FAMILY_V6)
{
if (ip6tc_flush_entries(chain, h->handle))
}
}
-void fw3_ipt_delete_rules(struct fw3_ipt_handle *h, const char *target)
+void
+fw3_ipt_delete_rules(struct fw3_ipt_handle *h, const char *target)
{
unsigned int num;
const struct ipt_entry *e;
if (*t && !strcmp(t, target))
{
+ if (fw3_pr_debug)
+ printf("-D %s %u\n", chain, num + 1);
+
ip6tc_delete_num_entry(chain, num, h->handle);
found = true;
break;
if (*t && !strcmp(t, target))
{
+ if (fw3_pr_debug)
+ printf("-D %s %u\n", chain, num + 1);
+
iptc_delete_num_entry(chain, num, h->handle);
found = true;
break;
}
}
-void fw3_ipt_flush(struct fw3_ipt_handle *h)
+void
+fw3_ipt_flush(struct fw3_ipt_handle *h)
{
const char *chain;
}
}
-void fw3_ipt_commit(struct fw3_ipt_handle *h)
+void
+fw3_ipt_commit(struct fw3_ipt_handle *h)
{
+ int rv;
+
if (h->family == FW3_FAMILY_V6)
- ip6tc_commit(h->handle);
+ {
+ rv = ip6tc_commit(h->handle);
+ if (!rv)
+ fprintf(stderr, "ip6tc_commit(): %s\n", ip6tc_strerror(errno));
+ }
else
- iptc_commit(h->handle);
+ {
+ rv = iptc_commit(h->handle);
+ if (!rv)
+ fprintf(stderr, "iptc_commit(): %s\n", iptc_strerror(errno));
+ }
free(h);
}
+
+struct fw3_ipt_rule *
+fw3_ipt_rule_new(struct fw3_ipt_handle *h)
+{
+ struct fw3_ipt_rule *r;
+
+ r = fw3_alloc(sizeof(*r));
+
+ r->h = h;
+ r->argv = fw3_alloc(sizeof(char *));
+ r->argv[r->argc++] = "fw3";
+
+ return r;
+}
+
+
+static bool
+is_chain(struct fw3_ipt_handle *h, const char *name)
+{
+ if (h->family == FW3_FAMILY_V6)
+ return ip6tc_is_chain(name, h->handle);
+ else
+ return iptc_is_chain(name, h->handle);
+}
+
+static char *
+get_protoname(struct fw3_ipt_rule *r)
+{
+ const struct xtables_pprot *pp;
+
+ if (r->protocol)
+ for (pp = xtables_chain_protos; pp->name; pp++)
+ if (pp->num == r->protocol)
+ return (char *)pp->name;
+
+ return NULL;
+}
+
+static struct xtables_match *
+find_match(struct fw3_ipt_rule *r, const char *name)
+{
+ return xtables_find_match(name, XTF_TRY_LOAD, &r->matches);
+}
+
+static void
+init_match(struct fw3_ipt_rule *r, struct xtables_match *m, bool no_clone)
+{
+ size_t s;
+ struct xtables_globals *g;
+
+ if (!m)
+ return;
+
+ s = XT_ALIGN(sizeof(struct xt_entry_match)) + m->size;
+
+ m->m = fw3_alloc(s);
+ strcpy(m->m->u.user.name, m->real_name ? m->real_name : m->name);
+ m->m->u.user.revision = m->revision;
+ m->m->u.match_size = s;
+
+ /* free previous userspace data */
+ if (m->udata_size)
+ {
+ free(m->udata);
+ m->udata = fw3_alloc(m->udata_size);
+ }
+
+ if (m->init)
+ m->init(m->m);
+
+ /* don't merge options if no_clone is set and this match is a clone */
+ if (no_clone && (m == m->next))
+ return;
+
+ /* merge option table */
+ g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
+
+ if (m->x6_options)
+ g->opts = xtables_options_xfrm(g->orig_opts, g->opts,
+ m->x6_options, &m->option_offset);
+
+ if (m->extra_opts)
+ g->opts = xtables_merge_options(g->orig_opts, g->opts,
+ m->extra_opts, &m->option_offset);
+}
+
+static bool
+need_protomatch(struct fw3_ipt_rule *r, const char *pname)
+{
+ if (!pname)
+ return false;
+
+ if (!xtables_find_match(pname, XTF_DONT_LOAD, NULL))
+ return true;
+
+ return !r->protocol_loaded;
+}
+
+static struct xtables_match *
+load_protomatch(struct fw3_ipt_rule *r)
+{
+ const char *pname = get_protoname(r);
+
+ if (!need_protomatch(r, pname))
+ return NULL;
+
+ return find_match(r, pname);
+}
+
+static struct xtables_target *
+get_target(struct fw3_ipt_rule *r, const char *name)
+{
+ size_t s;
+ struct xtables_target *t;
+ struct xtables_globals *g;
+
+ bool chain = is_chain(r->h, name);
+
+ if (chain)
+ t = xtables_find_target(XT_STANDARD_TARGET, XTF_LOAD_MUST_SUCCEED);
+ else
+ t = xtables_find_target(name, XTF_TRY_LOAD);
+
+ if (!t)
+ return NULL;
+
+ s = XT_ALIGN(sizeof(struct xt_entry_target)) + t->size;
+ t->t = fw3_alloc(s);
+
+ if (!t->real_name)
+ strcpy(t->t->u.user.name, name);
+ else
+ strcpy(t->t->u.user.name, t->real_name);
+
+ t->t->u.user.revision = t->revision;
+ t->t->u.target_size = s;
+
+ if (t->udata_size)
+ {
+ free(t->udata);
+ t->udata = fw3_alloc(t->udata_size);
+ }
+
+ if (t->init)
+ t->init(t->t);
+
+ /* merge option table */
+ g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
+
+ if (t->x6_options)
+ g->opts = xtables_options_xfrm(g->orig_opts, g->opts,
+ t->x6_options, &t->option_offset);
+ else
+ g->opts = xtables_merge_options(g->orig_opts, g->opts,
+ t->extra_opts, &t->option_offset);
+
+ r->target = t;
+
+ return t;
+}
+
+void
+fw3_ipt_rule_proto(struct fw3_ipt_rule *r, struct fw3_protocol *proto)
+{
+ uint32_t pr;
+
+ if (!proto || proto->any)
+ return;
+
+ pr = proto->protocol;
+
+ if (r->h->family == FW3_FAMILY_V6)
+ {
+ if (pr == 1)
+ pr = 58;
+
+ r->e6.ipv6.proto = pr;
+ r->e6.ipv6.flags |= IP6T_F_PROTO;
+
+ if (proto->invert)
+ r->e6.ipv6.invflags |= XT_INV_PROTO;
+ }
+ else
+ {
+ r->e.ip.proto = pr;
+
+ if (proto->invert)
+ r->e.ip.invflags |= XT_INV_PROTO;
+ }
+
+ r->protocol = pr;
+}
+
+void
+fw3_ipt_rule_in_out(struct fw3_ipt_rule *r,
+ struct fw3_device *in, struct fw3_device *out)
+{
+ if (r->h->family == FW3_FAMILY_V6)
+ {
+ if (in && !in->any)
+ {
+ xtables_parse_interface(in->name, r->e6.ipv6.iniface,
+ r->e6.ipv6.iniface_mask);
+
+ if (in->invert)
+ r->e6.ipv6.invflags |= IP6T_INV_VIA_IN;
+ }
+
+ if (out && !out->any)
+ {
+ xtables_parse_interface(out->name, r->e6.ipv6.outiface,
+ r->e6.ipv6.outiface_mask);
+
+ if (out->invert)
+ r->e6.ipv6.invflags |= IP6T_INV_VIA_OUT;
+ }
+ }
+ else
+ {
+ if (in && !in->any)
+ {
+ xtables_parse_interface(in->name, r->e.ip.iniface,
+ r->e.ip.iniface_mask);
+
+ if (in->invert)
+ r->e.ip.invflags |= IPT_INV_VIA_IN;
+ }
+
+ if (out && !out->any)
+ {
+ xtables_parse_interface(out->name, r->e.ip.outiface,
+ r->e.ip.outiface_mask);
+
+ if (out->invert)
+ r->e.ip.invflags |= IPT_INV_VIA_OUT;
+ }
+ }
+}
+
+
+static void
+ip4prefix2mask(int prefix, struct in_addr *mask)
+{
+ mask->s_addr = htonl(~((1 << (32 - prefix)) - 1));
+}
+
+static void
+ip6prefix2mask(int prefix, struct in6_addr *mask)
+{
+ char *p = (char *)mask;
+
+ if (prefix > 0)
+ {
+ memset(p, 0xff, prefix / 8);
+ memset(p + (prefix / 8) + 1, 0, (128 - prefix) / 8);
+ p[prefix / 8] = 0xff << (8 - (prefix & 7));
+ }
+ else
+ {
+ memset(mask, 0, sizeof(*mask));
+ }
+}
+
+void
+fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
+ struct fw3_address *src, struct fw3_address *dest)
+{
+ int i;
+
+ if ((src && src->range) || (dest && dest->range))
+ {
+ fw3_ipt_rule_addarg(r, false, "-m", "iprange");
+ }
+
+ if (src && src->set)
+ {
+ if (src->range)
+ {
+ fw3_ipt_rule_addarg(r, src->invert, "--src-range",
+ fw3_address_to_string(src, false));
+ }
+ else if (r->h->family == FW3_FAMILY_V6)
+ {
+ r->e6.ipv6.src = src->address.v6;
+ ip6prefix2mask(src->mask, &r->e6.ipv6.smsk);
+
+ for (i = 0; i < 4; i++)
+ r->e6.ipv6.src.s6_addr32[i] &= r->e6.ipv6.smsk.s6_addr32[i];
+
+ if (src->invert)
+ r->e6.ipv6.invflags |= IP6T_INV_SRCIP;
+ }
+ else
+ {
+ r->e.ip.src = src->address.v4;
+ ip4prefix2mask(src->mask, &r->e.ip.smsk);
+
+ r->e.ip.src.s_addr &= r->e.ip.smsk.s_addr;
+
+ if (src->invert)
+ r->e.ip.invflags |= IPT_INV_SRCIP;
+ }
+ }
+
+ if (dest && dest->set)
+ {
+ if (dest->range)
+ {
+ fw3_ipt_rule_addarg(r, dest->invert, "--dst-range",
+ fw3_address_to_string(dest, false));
+ }
+ else if (r->h->family == FW3_FAMILY_V6)
+ {
+ r->e6.ipv6.dst = dest->address.v6;
+ ip6prefix2mask(dest->mask, &r->e6.ipv6.dmsk);
+
+ for (i = 0; i < 4; i++)
+ r->e6.ipv6.dst.s6_addr32[i] &= r->e6.ipv6.dmsk.s6_addr32[i];
+
+ if (dest->invert)
+ r->e6.ipv6.invflags |= IP6T_INV_DSTIP;
+ }
+ else
+ {
+ r->e.ip.dst = dest->address.v4;
+ ip4prefix2mask(dest->mask, &r->e.ip.dmsk);
+
+ r->e.ip.dst.s_addr &= r->e.ip.dmsk.s_addr;
+
+ if (dest->invert)
+ r->e.ip.invflags |= IPT_INV_DSTIP;
+ }
+ }
+}
+
+void
+fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
+ struct fw3_port *sp, struct fw3_port *dp)
+{
+ char buf[sizeof("65535:65535\0")];
+
+ if ((!sp || !sp->set) && (!dp || !dp->set))
+ return;
+
+ if (!get_protoname(r))
+ return;
+
+ if (sp && sp->set)
+ {
+ if (sp->port_min == sp->port_max)
+ sprintf(buf, "%u", sp->port_min);
+ else
+ sprintf(buf, "%u:%u", sp->port_min, sp->port_max);
+
+ fw3_ipt_rule_addarg(r, sp->invert, "--sport", buf);
+ }
+
+ if (dp && dp->set)
+ {
+ if (dp->port_min == dp->port_max)
+ sprintf(buf, "%u", dp->port_min);
+ else
+ sprintf(buf, "%u:%u", dp->port_min, dp->port_max);
+
+ fw3_ipt_rule_addarg(r, dp->invert, "--dport", buf);
+ }
+}
+
+void
+fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac)
+{
+ if (!mac)
+ return;
+
+ fw3_ipt_rule_addarg(r, false, "-m", "mac");
+ fw3_ipt_rule_addarg(r, mac->invert, "--mac-source", ether_ntoa(&mac->mac));
+}
+
+void
+fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp)
+{
+ char buf[sizeof("255/255\0")];
+
+ if (!icmp)
+ return;
+
+ if (r->h->family == FW3_FAMILY_V6)
+ {
+ if (icmp->code6_min == 0 && icmp->code6_max == 0xFF)
+ sprintf(buf, "%u", icmp->type6);
+ else
+ sprintf(buf, "%u/%u", icmp->type6, icmp->code6_min);
+
+ fw3_ipt_rule_addarg(r, icmp->invert, "--icmpv6-type", buf);
+ }
+ else
+ {
+ if (icmp->code_min == 0 && icmp->code_max == 0xFF)
+ sprintf(buf, "%u", icmp->type);
+ else
+ sprintf(buf, "%u/%u", icmp->type, icmp->code_min);
+
+ fw3_ipt_rule_addarg(r, icmp->invert, "--icmp-type", buf);
+ }
+}
+
+void
+fw3_ipt_rule_limit(struct fw3_ipt_rule *r, struct fw3_limit *limit)
+{
+ char buf[sizeof("-4294967296/second\0")];
+
+ if (!limit || limit->rate <= 0)
+ return;
+
+ fw3_ipt_rule_addarg(r, false, "-m", "limit");
+
+ sprintf(buf, "%u/%s", limit->rate, fw3_limit_units[limit->unit]);
+ fw3_ipt_rule_addarg(r, limit->invert, "--limit", buf);
+
+ if (limit->burst > 0)
+ {
+ sprintf(buf, "%u", limit->burst);
+ fw3_ipt_rule_addarg(r, limit->invert, "--limit-burst", buf);
+ }
+}
+
+void
+fw3_ipt_rule_ipset(struct fw3_ipt_rule *r, struct fw3_ipset *ipset,
+ bool invert)
+{
+ char buf[sizeof("dst,dst,dst\0")];
+ char *p = buf;
+
+ struct fw3_ipset_datatype *type;
+
+ if (!ipset)
+ return;
+
+ list_for_each_entry(type, &ipset->datatypes, list)
+ {
+ if (p > buf)
+ *p++ = ',';
+
+ p += sprintf(p, "%s", type->dest ? "dst" : "src");
+ }
+
+ fw3_ipt_rule_addarg(r, false, "-m", "set");
+
+ fw3_ipt_rule_addarg(r, invert, "--match-set",
+ ipset->external ? ipset->external : ipset->name);
+
+ fw3_ipt_rule_addarg(r, false, buf, NULL);
+}
+
+void
+fw3_ipt_rule_time(struct fw3_ipt_rule *r, struct fw3_time *time)
+{
+ int i;
+ struct tm empty = { 0 };
+
+ char buf[84]; /* sizeof("1,2,3,...,30,31\0") */
+ char *p;
+
+ bool d1 = memcmp(&time->datestart, &empty, sizeof(empty));
+ bool d2 = memcmp(&time->datestop, &empty, sizeof(empty));
+
+ if (!d1 && !d2 && !time->timestart && !time->timestop &&
+ !(time->monthdays & 0xFFFFFFFE) && !(time->weekdays & 0xFE))
+ {
+ return;
+ }
+
+ fw3_ipt_rule_addarg(r, false, "-m", "time");
+
+ if (time->utc)
+ fw3_ipt_rule_addarg(r, false, "--utc", NULL);
+
+ if (d1)
+ {
+ strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestart);
+ fw3_ipt_rule_addarg(r, false, "--datestart", buf);
+ }
+
+ if (d2)
+ {
+ strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S", &time->datestop);
+ fw3_ipt_rule_addarg(r, false, "--datestop", buf);
+ }
+
+ if (time->timestart)
+ {
+ sprintf(buf, "%02d:%02d:%02d",
+ time->timestart / 3600,
+ time->timestart % 3600 / 60,
+ time->timestart % 60);
+
+ fw3_ipt_rule_addarg(r, false, "--timestart", buf);
+ }
+
+ if (time->timestop)
+ {
+ sprintf(buf, "%02d:%02d:%02d",
+ time->timestop / 3600,
+ time->timestop % 3600 / 60,
+ time->timestop % 60);
+
+ fw3_ipt_rule_addarg(r, false, "--timestop", buf);
+ }
+
+ if (time->monthdays & 0xFFFFFFFE)
+ {
+ for (i = 1, p = buf; i < 32; i++)
+ {
+ if (hasbit(time->monthdays, i))
+ {
+ if (p > buf)
+ *p++ = ',';
+
+ p += sprintf(p, "%u", i);
+ }
+ }
+
+ fw3_ipt_rule_addarg(r, hasbit(time->monthdays, 0), "--monthdays", buf);
+ }
+
+ if (time->weekdays & 0xFE)
+ {
+ for (i = 1, p = buf; i < 8; i++)
+ {
+ if (hasbit(time->weekdays, i))
+ {
+ if (p > buf)
+ *p++ = ',';
+
+ p += sprintf(p, "%u", i);
+ }
+ }
+
+ fw3_ipt_rule_addarg(r, hasbit(time->weekdays, 0), "--weekdays", buf);
+ }
+}
+
+void
+fw3_ipt_rule_mark(struct fw3_ipt_rule *r, struct fw3_mark *mark)
+{
+ char buf[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
+
+ if (!mark || !mark->set)
+ return;
+
+ if (mark->mask < 0xFFFFFFFF)
+ sprintf(buf, "0x%x/0x%x", mark->mark, mark->mask);
+ else
+ sprintf(buf, "0x%x", mark->mark);
+
+ fw3_ipt_rule_addarg(r, false, "-m", "mark");
+ fw3_ipt_rule_addarg(r, mark->invert, "--mark", buf);
+}
+
+void
+fw3_ipt_rule_comment(struct fw3_ipt_rule *r, const char *fmt, ...)
+{
+ va_list ap;
+ char buf[256];
+
+ if (!fmt || !*fmt)
+ return;
+
+ va_start(ap, fmt);
+ vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
+ va_end(ap);
+
+ fw3_ipt_rule_addarg(r, false, "-m", "comment");
+ fw3_ipt_rule_addarg(r, false, "--comment", buf);
+}
+
+void
+fw3_ipt_rule_extra(struct fw3_ipt_rule *r, const char *extra)
+{
+ char *p, **tmp, *s;
+
+ if (!extra || !*extra)
+ return;
+
+ s = fw3_strdup(extra);
+
+ for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
+ {
+ tmp = realloc(r->argv, (r->argc + 1) * sizeof(*r->argv));
+
+ if (!tmp)
+ break;
+
+ r->argv = tmp;
+ r->argv[r->argc++] = fw3_strdup(p);
+ }
+
+ free(s);
+}
+
+static void
+rule_print6(struct ip6t_entry *e)
+{
+ char buf[INET6_ADDRSTRLEN];
+ char *pname;
+
+ if (e->ipv6.flags & IP6T_F_PROTO)
+ {
+ if (e->ipv6.flags & XT_INV_PROTO)
+ printf(" !");
+
+ pname = get_protoname(container_of(e, struct fw3_ipt_rule, e6));
+
+ if (pname)
+ printf(" -p %s", pname);
+ else
+ printf(" -p %u", e->ipv6.proto);
+ }
+
+ if (e->ipv6.iniface[0])
+ {
+ if (e->ipv6.flags & IP6T_INV_VIA_IN)
+ printf(" !");
+
+ printf(" -i %s", e->ipv6.iniface);
+ }
+
+ if (e->ipv6.outiface[0])
+ {
+ if (e->ipv6.flags & IP6T_INV_VIA_OUT)
+ printf(" !");
+
+ printf(" -o %s", e->ipv6.outiface);
+ }
+
+ if (memcmp(&e->ipv6.src, &in6addr_any, sizeof(struct in6_addr)))
+ {
+ if (e->ipv6.flags & IP6T_INV_SRCIP)
+ printf(" !");
+
+ printf(" -s %s/%u", inet_ntop(AF_INET6, &e->ipv6.src, buf, sizeof(buf)),
+ xtables_ip6mask_to_cidr(&e->ipv6.smsk));
+ }
+
+ if (memcmp(&e->ipv6.dst, &in6addr_any, sizeof(struct in6_addr)))
+ {
+ if (e->ipv6.flags & IP6T_INV_DSTIP)
+ printf(" !");
+
+ printf(" -d %s/%u", inet_ntop(AF_INET6, &e->ipv6.dst, buf, sizeof(buf)),
+ xtables_ip6mask_to_cidr(&e->ipv6.dmsk));
+ }
+}
+
+static void
+rule_print4(struct ipt_entry *e)
+{
+ struct in_addr in_zero = { 0 };
+ char buf[sizeof("255.255.255.255\0")];
+ char *pname;
+
+ if (e->ip.proto)
+ {
+ if (e->ip.flags & XT_INV_PROTO)
+ printf(" !");
+
+ pname = get_protoname(container_of(e, struct fw3_ipt_rule, e));
+
+ if (pname)
+ printf(" -p %s", pname);
+ else
+ printf(" -p %u", e->ip.proto);
+ }
+
+ if (e->ip.iniface[0])
+ {
+ if (e->ip.flags & IPT_INV_VIA_IN)
+ printf(" !");
+
+ printf(" -i %s", e->ip.iniface);
+ }
+
+ if (e->ip.outiface[0])
+ {
+ if (e->ip.flags & IPT_INV_VIA_OUT)
+ printf(" !");
+
+ printf(" -o %s", e->ip.outiface);
+ }
+
+ if (memcmp(&e->ip.src, &in_zero, sizeof(struct in_addr)))
+ {
+ if (e->ip.flags & IPT_INV_SRCIP)
+ printf(" !");
+
+ printf(" -s %s/%u", inet_ntop(AF_INET, &e->ip.src, buf, sizeof(buf)),
+ xtables_ipmask_to_cidr(&e->ip.smsk));
+ }
+
+ if (memcmp(&e->ip.dst, &in_zero, sizeof(struct in_addr)))
+ {
+ if (e->ip.flags & IPT_INV_DSTIP)
+ printf(" !");
+
+ printf(" -d %s/%u", inet_ntop(AF_INET, &e->ip.dst, buf, sizeof(buf)),
+ xtables_ipmask_to_cidr(&e->ip.dmsk));
+ }
+}
+
+static void
+rule_print(struct fw3_ipt_rule *r, const char *chain)
+{
+ struct xtables_rule_match *rm;
+ struct xtables_match *m;
+ struct xtables_target *t;
+
+ printf("-A %s", chain);
+
+ if (r->h->family == FW3_FAMILY_V6)
+ rule_print6(&r->e6);
+ else
+ rule_print4(&r->e);
+
+ for (rm = r->matches; rm; rm = rm->next)
+ {
+ m = rm->match;
+ printf(" -m %s", m->alias ? m->alias(m->m) : m->m->u.user.name);
+
+ if (m->save)
+ m->save(&r->e.ip, m->m);
+ }
+
+ if (r->target)
+ {
+ t = r->target;
+ printf(" -j %s", t->alias ? t->alias(t->t) : t->t->u.user.name);
+
+ if (t->save)
+ t->save(&r->e.ip, t->t);
+ }
+
+ printf("\n");
+}
+
+static bool
+parse_option(struct fw3_ipt_rule *r, int optc, bool inv)
+{
+ struct xtables_rule_match *m;
+ struct xtables_match *em;
+
+ /* is a target option */
+ if (r->target && (r->target->parse || r->target->x6_parse) &&
+ optc >= r->target->option_offset &&
+ optc < (r->target->option_offset + 256))
+ {
+ xtables_option_tpcall(optc, r->argv, inv, r->target, &r->e);
+ return false;
+ }
+
+ /* try to dispatch argument to one of the match parsers */
+ for (m = r->matches; m; m = m->next)
+ {
+ em = m->match;
+
+ if (m->completed || (!em->parse && !em->x6_parse))
+ continue;
+
+ if (optc < em->option_offset ||
+ optc >= (em->option_offset + 256))
+ continue;
+
+ xtables_option_mpcall(optc, r->argv, inv, em, &r->e);
+ return false;
+ }
+
+ /* unhandled option, might belong to a protocol match */
+ if ((em = load_protomatch(r)) != NULL)
+ {
+ init_match(r, em, false);
+
+ r->protocol_loaded = true;
+ optind--;
+
+ return true;
+ }
+
+ if (optc == ':')
+ fprintf(stderr, "parse_option(): option '%s' needs argument\n",
+ r->argv[optind-1]);
+
+ if (optc == '?')
+ fprintf(stderr, "parse_option(): unknown option '%s'\n",
+ r->argv[optind-1]);
+
+ return false;
+}
+
+void
+fw3_ipt_rule_addarg(struct fw3_ipt_rule *r, bool inv,
+ const char *k, const char *v)
+{
+ int n;
+ char **tmp;
+
+ if (!k)
+ return;
+
+ n = inv + !!k + !!v;
+ tmp = realloc(r->argv, (r->argc + n) * sizeof(*tmp));
+
+ if (!tmp)
+ return;
+
+ r->argv = tmp;
+
+ if (inv)
+ r->argv[r->argc++] = fw3_strdup("!");
+
+ r->argv[r->argc++] = fw3_strdup(k);
+
+ if (v)
+ r->argv[r->argc++] = fw3_strdup(v);
+}
+
+void
+fw3_ipt_rule_append(struct fw3_ipt_rule *r, const char *fmt, ...)
+{
+ size_t s;
+ struct xtables_rule_match *m;
+ struct xtables_match *em;
+ struct xtables_target *et;
+ struct xtables_globals *g;
+ struct ipt_entry *e;
+ struct ip6t_entry *e6;
+
+ int i, optc;
+ bool inv = false;
+ char buf[32];
+ va_list ap;
+
+ va_start(ap, fmt);
+ vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
+ va_end(ap);
+
+ g = (r->h->family == FW3_FAMILY_V6) ? &xtg6 : &xtg;
+ g->opts = g->orig_opts;
+
+ optind = 0;
+ opterr = 0;
+
+ while ((optc = getopt_long(r->argc, r->argv, "m:j:", g->opts, NULL)) != -1)
+ {
+ switch (optc)
+ {
+ case 'm':
+ em = find_match(r, optarg);
+
+ if (!em)
+ {
+ fprintf(stderr, "fw3_ipt_rule_append(): Can't find match '%s'\n", optarg);
+ return;
+ }
+
+ init_match(r, em, true);
+ break;
+
+ case 'j':
+ et = get_target(r, optarg);
+
+ if (!et)
+ {
+ fprintf(stderr, "fw3_ipt_rule_append(): Can't find target '%s'\n", optarg);
+ return;
+ }
+
+ break;
+
+ case 1:
+ if ((optarg[0] == '!') && (optarg[1] == '\0'))
+ {
+ inv = true;
+ continue;
+ }
+
+ fprintf(stderr, "fw3_ipt_rule_append(): Bad argument '%s'\n", optarg);
+ return;
+
+ default:
+ if (parse_option(r, optc, inv))
+ continue;
+ break;
+ }
+
+ inv = false;
+ }
+
+ for (m = r->matches; m; m = m->next)
+ xtables_option_mfcall(m->match);
+
+ if (r->target)
+ xtables_option_tfcall(r->target);
+
+ if (fw3_pr_debug)
+ rule_print(r, buf);
+
+ if (r->h->family == FW3_FAMILY_V6)
+ {
+ s = XT_ALIGN(sizeof(struct ip6t_entry));
+
+ for (m = r->matches; m; m = m->next)
+ s += m->match->m->u.match_size;
+
+ e6 = fw3_alloc(s + r->target->t->u.target_size);
+
+ memcpy(e6, &r->e6, sizeof(struct ip6t_entry));
+
+ e6->target_offset = s;
+ e6->next_offset = s + r->target->t->u.target_size;
+
+ s = 0;
+
+ for (m = r->matches; m; m = m->next)
+ {
+ memcpy(e6->elems + s, m->match->m, m->match->m->u.match_size);
+ s += m->match->m->u.match_size;
+ }
+
+ memcpy(e6->elems + s, r->target->t, r->target->t->u.target_size);
+ ip6tc_append_entry(buf, e6, r->h->handle);
+ free(e6);
+ }
+ else
+ {
+ s = XT_ALIGN(sizeof(struct ipt_entry));
+
+ for (m = r->matches; m; m = m->next)
+ s += m->match->m->u.match_size;
+
+ e = fw3_alloc(s + r->target->t->u.target_size);
+
+ memcpy(e, &r->e, sizeof(struct ipt_entry));
+
+ e->target_offset = s;
+ e->next_offset = s + r->target->t->u.target_size;
+
+ s = 0;
+
+ for (m = r->matches; m; m = m->next)
+ {
+ memcpy(e->elems + s, m->match->m, m->match->m->u.match_size);
+ s += m->match->m->u.match_size;
+ }
+
+ memcpy(e->elems + s, r->target->t, r->target->t->u.target_size);
+
+ if (!iptc_append_entry(buf, e, r->h->handle))
+ fprintf(stderr, "iptc_append_entry(): %s\n", iptc_strerror(errno));
+
+ free(e);
+ }
+
+ for (i = 1; i < r->argc; i++)
+ free(r->argv[i]);
+
+ free(r->argv);
+
+ xtables_rule_matches_free(&r->matches);
+
+ free(r->target->t);
+ free(r);
+
+ /* reset all targets and matches */
+ for (em = xtables_matches; em; em = em->next)
+ em->mflags = 0;
+
+ for (et = xtables_targets; et; et = et->next)
+ {
+ et->tflags = 0;
+ et->used = 0;
+ }
+
+ xtables_free_opts(1);
+}
+
+struct fw3_ipt_rule *
+fw3_ipt_rule_create(struct fw3_ipt_handle *handle, struct fw3_protocol *proto,
+ struct fw3_device *in, struct fw3_device *out,
+ struct fw3_address *src, struct fw3_address *dest)
+{
+ struct fw3_ipt_rule *r;
+
+ r = fw3_ipt_rule_new(handle);
+
+ fw3_ipt_rule_proto(r, proto);
+ fw3_ipt_rule_in_out(r, in, out);
+ fw3_ipt_rule_src_dest(r, src, dest);
+
+ return r;
+}
#include <libiptc/libiptc.h>
#include <libiptc/libip6tc.h>
+#include <xtables.h>
+
+#include <unistd.h>
+#include <getopt.h>
+#include <sys/utsname.h>
#include "options.h"
+extern struct xtables_match *xtables_pending_matches;
+extern struct xtables_target *xtables_pending_targets;
+
+/* libext.a interface */
+void init_extensions(void);
+void init_extensions4(void);
+void init_extensions6(void);
+
+/* Required by certain extensions like SNAT and DNAT */
+extern int kernel_version;
+void get_kernel_version(void);
+
struct fw3_ipt_handle {
enum fw3_family family;
enum fw3_table table;
struct xtc_handle *handle;
};
-struct fw3_ipt_handle *fw3_ipt_open(enum fw3_family family, enum fw3_table table);
+struct fw3_ipt_rule {
+ struct fw3_ipt_handle *h;
+
+ union {
+ struct ipt_entry e;
+ struct ip6t_entry e6;
+ };
+
+ struct xtables_rule_match *matches;
+ struct xtables_target *target;
+
+ int argc;
+ char **argv;
+
+ uint32_t protocol;
+ bool protocol_loaded;
+};
+
+struct fw3_ipt_handle *fw3_ipt_open(enum fw3_family family,
+ enum fw3_table table);
+
+void fw3_ipt_set_policy(struct fw3_ipt_handle *h, const char *chain,
+ enum fw3_flag policy);
-void fw3_ipt_set_policy(struct fw3_ipt_handle *h, enum fw3_flag policy);
void fw3_ipt_delete_chain(struct fw3_ipt_handle *h, const char *chain);
void fw3_ipt_delete_rules(struct fw3_ipt_handle *h, const char *target);
+
+static inline void
+fw3_ipt_create_chain(struct fw3_ipt_handle *h, const char *fmt, ...)
+{
+ char buf[32];
+ va_list ap;
+
+ va_start(ap, fmt);
+ vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
+ va_end(ap);
+
+ if (fw3_pr_debug)
+ printf("-N %s\n", buf);
+
+ iptc_create_chain(buf, h->handle);
+}
+
void fw3_ipt_flush(struct fw3_ipt_handle *h);
void fw3_ipt_commit(struct fw3_ipt_handle *h);
+struct fw3_ipt_rule *fw3_ipt_rule_new(struct fw3_ipt_handle *h);
+
+void fw3_ipt_rule_proto(struct fw3_ipt_rule *r, struct fw3_protocol *proto);
+
+void fw3_ipt_rule_in_out(struct fw3_ipt_rule *r,
+ struct fw3_device *in, struct fw3_device *out);
+
+void fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
+ struct fw3_address *src, struct fw3_address *dest);
+
+void fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
+ struct fw3_port *sp, struct fw3_port *dp);
+
+void fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac);
+
+void fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp);
+
+void fw3_ipt_rule_limit(struct fw3_ipt_rule *r, struct fw3_limit *limit);
+
+void fw3_ipt_rule_ipset(struct fw3_ipt_rule *r, struct fw3_ipset *ipset,
+ bool invert);
+
+void fw3_ipt_rule_time(struct fw3_ipt_rule *r, struct fw3_time *time);
+
+void fw3_ipt_rule_mark(struct fw3_ipt_rule *r, struct fw3_mark *mark);
+
+void fw3_ipt_rule_comment(struct fw3_ipt_rule *r, const char *fmt, ...);
+
+void fw3_ipt_rule_extra(struct fw3_ipt_rule *r, const char *extra);
+
+void fw3_ipt_rule_addarg(struct fw3_ipt_rule *r, bool inv,
+ const char *k, const char *v);
+
+struct fw3_ipt_rule * fw3_ipt_rule_create(struct fw3_ipt_handle *handle,
+ struct fw3_protocol *proto,
+ struct fw3_device *in,
+ struct fw3_device *out,
+ struct fw3_address *src,
+ struct fw3_address *dest);
+
+void fw3_ipt_rule_append(struct fw3_ipt_rule *r, const char *fmt, ...);
+
+static inline void
+fw3_ipt_rule_target(struct fw3_ipt_rule *r, const char *fmt, ...)
+{
+ va_list ap;
+ char buf[32];
+
+ va_start(ap, fmt);
+ vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
+ va_end(ap);
+
+ fw3_ipt_rule_addarg(r, false, "-j", buf);
+}
+
#endif
}
-static bool
-restore_pipe(enum fw3_family family, bool silent)
-{
- 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(enum fw3_family family)
{
int rv = 1;
enum fw3_family family;
enum fw3_table table;
+ struct fw3_ipt_handle *handle;
if (!print_rules)
{
continue;
}
- if (!restore_pipe(family, false))
- 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(cfg_state, family, table, false);
- fw3_print_zone_chains(cfg_state, family, table, false);
- fw3_print_default_head_rules(cfg_state, family, table, false);
- fw3_print_rules(cfg_state, family, table);
- fw3_print_redirects(cfg_state, family, table);
- fw3_print_forwards(cfg_state, family, table);
- fw3_print_zone_rules(cfg_state, family, table, false);
- fw3_print_default_tail_rules(cfg_state, family, table, false);
- 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);
+
+ fw3_ipt_commit(handle);
}
- fw3_print_includes(cfg_state, family, false);
+ //fw3_print_includes(cfg_state, family, false);
- fw3_command_close();
family_set(run_state, family, true);
family_set(cfg_state, family, true);
family_set(cfg_state, family, false);
start:
- if (!restore_pipe(family, true))
- continue;
-
if (family == FW3_FAMILY_V6 && cfg_state->defaults.disable_ipv6)
- goto skip;
+ 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(cfg_state, family, table, true);
- fw3_print_zone_chains(cfg_state, family, table, true);
- fw3_print_default_head_rules(cfg_state, family, table, true);
- fw3_print_rules(cfg_state, family, table);
- fw3_print_redirects(cfg_state, family, table);
- fw3_print_forwards(cfg_state, family, table);
- fw3_print_zone_rules(cfg_state, family, table, true);
- fw3_print_default_tail_rules(cfg_state, family, table, true);
- 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_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_print_includes(cfg_state, family, true);
+ //fw3_print_includes(cfg_state, family, true);
family_set(run_state, family, true);
family_set(cfg_state, family, true);
rv = 0;
-
-skip:
- fw3_command_close();
}
if (!rv)
"DROP",
};
-static const char *limit_units[] = {
+const char *fw3_limit_units[__FW3_LIMIT_UNIT_MAX] = {
"second",
"minute",
"hour",
if (!strlen(e))
return false;
- if (!parse_enum(&u, e, limit_units, 0, FW3_LIMIT_UNIT_DAY))
+ if (!parse_enum(&u, e, fw3_limit_units, 0, FW3_LIMIT_UNIT_DAY))
return false;
limit->rate = n;
}
-void
-fw3_format_in_out(struct fw3_device *in, struct fw3_device *out)
-{
- if (in && !in->any)
- fw3_pr(" %s-i %s", in->invert ? "! " : "", in->name);
-
- if (out && !out->any)
- fw3_pr(" %s-o %s", out->invert ? "! " : "", out->name);
-}
-
const char *
fw3_address_to_string(struct fw3_address *address, bool allow_invert)
{
{
fw3_pr(" -m limit %s--limit %u/%s",
limit->invert ? "! " : "",
- limit->rate, limit_units[limit->unit]);
+ limit->rate, fw3_limit_units[limit->unit]);
if (limit->burst > 0)
fw3_pr(" --limit-burst %u", limit->burst);
FW3_LIMIT_UNIT_MINUTE = 1,
FW3_LIMIT_UNIT_HOUR = 2,
FW3_LIMIT_UNIT_DAY = 3,
+
+ __FW3_LIMIT_UNIT_MAX
};
+extern const char *fw3_limit_units[__FW3_LIMIT_UNIT_MAX];
+
+
enum fw3_ipset_method
{
FW3_IPSET_METHOD_UNSPEC = 0,
}
static void
-print_chain_nat(struct fw3_redirect *redir)
+append_chain_nat(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
{
if (redir->target == FW3_FLAG_DNAT)
- fw3_pr("-A zone_%s_prerouting", redir->src.name);
+ fw3_ipt_rule_append(r, "zone_%s_prerouting", redir->src.name);
else
- fw3_pr("-A zone_%s_postrouting", redir->dest.name);
+ fw3_ipt_rule_append(r, "zone_%s_postrouting", redir->dest.name);
}
static void
-print_snat_dnat(enum fw3_flag target,
- struct fw3_address *addr, struct fw3_port *port)
+set_snat_dnat(struct fw3_ipt_rule *r, enum fw3_flag target,
+ struct fw3_address *addr, struct fw3_port *port)
{
- char s[sizeof("255.255.255.255 ")];
+ char buf[sizeof("255.255.255.255:65535-65535\0")];
- if (target == FW3_FLAG_DNAT)
- fw3_pr(" -j DNAT --to-destination ");
- else
- fw3_pr(" -j SNAT --to-source ");
+ buf[0] = '\0';
if (addr && addr->set)
{
- inet_ntop(AF_INET, &addr->address.v4, s, sizeof(s));
- fw3_pr(s);
+ inet_ntop(AF_INET, &addr->address.v4, buf, sizeof(buf));
}
if (port && port->set)
{
if (port->port_min == port->port_max)
- fw3_pr(":%u", port->port_min);
+ sprintf(buf + strlen(buf), ":%u", port->port_min);
else
- fw3_pr(":%u-%u", port->port_min, port->port_max);
+ sprintf(buf + strlen(buf), ":%u-%u",
+ port->port_min, port->port_max);
}
- fw3_pr("\n");
+ if (target == FW3_FLAG_DNAT)
+ {
+ fw3_ipt_rule_target(r, "DNAT");
+ fw3_ipt_rule_addarg(r, false, "--to-destination", buf);
+ }
+ else
+ {
+ fw3_ipt_rule_target(r, "SNAT");
+ fw3_ipt_rule_addarg(r, false, "--to-source", buf);
+ }
}
static void
-print_target_nat(struct fw3_redirect *redir)
+set_target_nat(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
{
if (redir->target == FW3_FLAG_DNAT)
- print_snat_dnat(redir->target, &redir->ip_redir, &redir->port_redir);
+ set_snat_dnat(r, redir->target, &redir->ip_redir, &redir->port_redir);
else
- print_snat_dnat(redir->target, &redir->ip_dest, &redir->port_dest);
+ set_snat_dnat(r, redir->target, &redir->ip_dest, &redir->port_dest);
}
static void
-print_chain_filter(struct fw3_redirect *redir)
+append_chain_filter(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
{
if (redir->target == FW3_FLAG_DNAT)
{
/* XXX: check for local ip */
if (!redir->ip_redir.set)
- fw3_pr("-A zone_%s_input", redir->src.name);
+ fw3_ipt_rule_append(r, "zone_%s_input", redir->src.name);
else
- fw3_pr("-A zone_%s_forward", redir->src.name);
+ fw3_ipt_rule_append(r, "zone_%s_forward", redir->src.name);
}
else
{
if (redir->src.set && !redir->src.any)
- fw3_pr("-A zone_%s_forward", redir->src.name);
+ fw3_ipt_rule_append(r, "zone_%s_forward", redir->src.name);
else
- fw3_pr("-A delegate_forward");
+ fw3_ipt_rule_append(r, "delegate_forward");
}
}
static void
-print_target_filter(struct fw3_redirect *redir)
+set_target_filter(struct fw3_ipt_rule *r, struct fw3_redirect *redir)
{
/* XXX: check for local ip */
if (redir->target == FW3_FLAG_DNAT && !redir->ip_redir.set)
- fw3_pr(" -m conntrack --ctstate DNAT -j ACCEPT\n");
+ fw3_ipt_rule_extra(r, "-m conntrack --ctstate DNAT");
+
+ fw3_ipt_rule_target(r, "ACCEPT");
+}
+
+static void
+set_comment(struct fw3_ipt_rule *r, const char *name, int num, bool ref)
+{
+ if (name)
+ {
+ if (ref)
+ fw3_ipt_rule_comment(r, "%s (reflection)", name);
+ else
+ fw3_ipt_rule_comment(r, name);
+ }
else
- fw3_pr(" -j ACCEPT\n");
+ {
+ if (ref)
+ fw3_ipt_rule_comment(r, "@redirect[%u] (reflection)", num);
+ else
+ fw3_ipt_rule_comment(r, "@redirect[%u]", num);
+ }
+}
+
+static void
+print_redirect(struct fw3_ipt_handle *h, struct fw3_state *state,
+ struct fw3_redirect *redir, int num,
+ struct fw3_protocol *proto, struct fw3_mac *mac)
+{
+ struct fw3_ipt_rule *r;
+ struct fw3_address *src, *dst;
+ struct fw3_port *spt, *dpt;
+
+ switch (h->table)
+ {
+ case FW3_TABLE_NAT:
+ src = &redir->ip_src;
+ dst = &redir->ip_dest;
+ spt = &redir->port_src;
+ dpt = &redir->port_dest;
+
+ if (redir->target == FW3_FLAG_SNAT)
+ {
+ dst = &redir->ip_redir;
+ dpt = &redir->port_redir;
+ }
+
+ r = fw3_ipt_rule_create(h, proto, NULL, NULL, src, dst);
+ fw3_ipt_rule_sport_dport(r, spt, dpt);
+ fw3_ipt_rule_mac(r, mac);
+ fw3_ipt_rule_ipset(r, redir->_ipset, redir->ipset.invert);
+ fw3_ipt_rule_time(r, &redir->time);
+ fw3_ipt_rule_mark(r, &redir->mark);
+ set_target_nat(r, redir);
+ fw3_ipt_rule_extra(r, redir->extra);
+ set_comment(r, redir->name, num, false);
+ append_chain_nat(r, redir);
+ break;
+
+ case FW3_TABLE_FILTER:
+ src = &redir->ip_src;
+ dst = &redir->ip_redir;
+ spt = &redir->port_src;
+ dpt = &redir->port_redir;
+
+ r = fw3_ipt_rule_create(h, proto, NULL, NULL, src, dst);
+ fw3_ipt_rule_sport_dport(r, spt, dpt);
+ fw3_ipt_rule_mac(r, mac);
+ fw3_ipt_rule_ipset(r, redir->_ipset, redir->ipset.invert);
+ fw3_ipt_rule_time(r, &redir->time);
+ fw3_ipt_rule_mark(r, &redir->mark);
+ set_target_filter(r, redir);
+ fw3_ipt_rule_extra(r, redir->extra);
+ set_comment(r, redir->name, num, false);
+ append_chain_filter(r, redir);
+ break;
+
+ default:
+ break;
+ }
}
static void
-print_redirect(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, struct fw3_redirect *redir, int num)
+print_reflection(struct fw3_ipt_handle *h, struct fw3_state *state,
+ struct fw3_redirect *redir, int num,
+ struct fw3_protocol *proto, struct fw3_address *ra,
+ struct fw3_address *ia, struct fw3_address *ea)
+{
+ struct fw3_ipt_rule *r;
+
+ switch (h->table)
+ {
+ case FW3_TABLE_NAT:
+ r = fw3_ipt_rule_create(h, proto, NULL, NULL, ia, ea);
+ fw3_ipt_rule_sport_dport(r, NULL, &redir->port_dest);
+ fw3_ipt_rule_time(r, &redir->time);
+ set_comment(r, redir->name, num, true);
+ set_snat_dnat(r, FW3_FLAG_DNAT, &redir->ip_redir, &redir->port_redir);
+ fw3_ipt_rule_append(r, "zone_%s_prerouting", redir->dest.name);
+
+ r = fw3_ipt_rule_create(h, proto, NULL, NULL, ia, &redir->ip_redir);
+ fw3_ipt_rule_sport_dport(r, NULL, &redir->port_redir);
+ fw3_ipt_rule_time(r, &redir->time);
+ set_comment(r, redir->name, num, true);
+ set_snat_dnat(r, FW3_FLAG_SNAT, ra, NULL);
+ fw3_ipt_rule_append(r, "zone_%s_postrouting", redir->dest.name);
+ break;
+
+ case FW3_TABLE_FILTER:
+ r = fw3_ipt_rule_create(h, proto, NULL, NULL, ia, &redir->ip_redir);
+ fw3_ipt_rule_sport_dport(r, NULL, &redir->port_redir);
+ fw3_ipt_rule_time(r, &redir->time);
+ set_comment(r, redir->name, num, true);
+ fw3_ipt_rule_target(r, "zone_%s_dest_ACCEPT", redir->dest.name);
+ fw3_ipt_rule_append(r, "zone_%s_forward", redir->dest.name);
+ break;
+
+ default:
+ break;
+ }
+}
+
+static void
+expand_redirect(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ struct fw3_redirect *redir, int num)
{
struct list_head *ext_addrs, *int_addrs;
struct fw3_address *ext_addr, *int_addr, ref_addr;
else
info(" * Redirect #%u", num);
- if (!fw3_is_family(redir->_src, family) ||
- !fw3_is_family(redir->_dest, family))
+ if (!fw3_is_family(redir->_src, handle->family) ||
+ !fw3_is_family(redir->_dest, handle->family))
{
info(" ! Skipping due to different family of zone");
return;
}
- if (!fw3_is_family(&redir->ip_src, family) ||
- !fw3_is_family(&redir->ip_dest, family) ||
- !fw3_is_family(&redir->ip_redir, family))
+ if (!fw3_is_family(&redir->ip_src, handle->family) ||
+ !fw3_is_family(&redir->ip_dest, handle->family) ||
+ !fw3_is_family(&redir->ip_redir, handle->family))
{
info(" ! Skipping due to different family of ip address");
return;
if (redir->_ipset)
{
- if (!fw3_is_family(redir->_ipset, family))
+ if (!fw3_is_family(redir->_ipset, handle->family))
{
info(" ! Skipping due to different family in ipset");
return;
return;
}
- set(redir->_ipset->flags, family, family);
+ set(redir->_ipset->flags, handle->family, handle->family);
}
fw3_foreach(proto, &redir->proto)
fw3_foreach(mac, &redir->mac_src)
- {
- if (table == FW3_TABLE_NAT)
- {
- print_chain_nat(redir);
- fw3_format_ipset(redir->_ipset, redir->ipset.invert);
- fw3_format_protocol(proto, family);
-
- if (redir->target == FW3_FLAG_DNAT)
- {
- fw3_format_src_dest(&redir->ip_src, &redir->ip_dest);
- fw3_format_sport_dport(&redir->port_src, &redir->port_dest);
- }
- else
- {
- fw3_format_src_dest(&redir->ip_src, &redir->ip_redir);
- fw3_format_sport_dport(&redir->port_src, &redir->port_redir);
- }
-
- fw3_format_mac(mac);
- fw3_format_time(&redir->time);
- fw3_format_mark(&redir->mark);
- fw3_format_extra(redir->extra);
- fw3_format_comment(redir->name);
- print_target_nat(redir);
- }
- else if (table == FW3_TABLE_FILTER)
- {
- print_chain_filter(redir);
- fw3_format_ipset(redir->_ipset, redir->ipset.invert);
- fw3_format_protocol(proto, family);
- fw3_format_src_dest(&redir->ip_src, &redir->ip_redir);
- fw3_format_sport_dport(&redir->port_src, &redir->port_redir);
- fw3_format_mac(mac);
- fw3_format_time(&redir->time);
- fw3_format_mark(&redir->mark);
- fw3_format_extra(redir->extra);
- fw3_format_comment(redir->name);
- print_target_filter(redir);
- }
- }
+ print_redirect(handle, state, redir, num, proto, mac);
/* reflection rules */
if (redir->target != FW3_FLAG_DNAT || !redir->reflection)
fw3_foreach(int_addr, int_addrs)
fw3_foreach(proto, &redir->proto)
{
- if (!fw3_is_family(int_addr, family) ||
- !fw3_is_family(ext_addr, family))
+ if (!fw3_is_family(int_addr, handle->family) ||
+ !fw3_is_family(ext_addr, handle->family))
continue;
if (!proto || (proto->protocol != 6 && proto->protocol != 17))
ref_addr.mask = 32;
ext_addr->mask = 32;
- if (table == FW3_TABLE_NAT)
- {
- fw3_pr("-A zone_%s_prerouting", redir->dest.name);
- fw3_format_protocol(proto, family);
- fw3_format_src_dest(int_addr, ext_addr);
- fw3_format_sport_dport(NULL, &redir->port_dest);
- fw3_format_time(&redir->time);
- fw3_format_comment(redir->name, " (reflection)");
- print_snat_dnat(FW3_FLAG_DNAT,
- &redir->ip_redir, &redir->port_redir);
-
- fw3_pr("-A zone_%s_postrouting", redir->dest.name);
- fw3_format_protocol(proto, family);
- fw3_format_src_dest(int_addr, &redir->ip_redir);
- fw3_format_sport_dport(NULL, &redir->port_redir);
- fw3_format_time(&redir->time);
- fw3_format_comment(redir->name, " (reflection)");
- print_snat_dnat(FW3_FLAG_SNAT, &ref_addr, NULL);
- }
- else if (table == FW3_TABLE_FILTER)
- {
- fw3_pr("-A zone_%s_forward", redir->dest.name);
- fw3_format_protocol(proto, family);
- fw3_format_src_dest(int_addr, &redir->ip_redir);
- fw3_format_sport_dport(NULL, &redir->port_redir);
- fw3_format_time(&redir->time);
- fw3_format_comment(redir->name, " (reflection)");
- fw3_pr(" -j zone_%s_dest_ACCEPT\n", redir->dest.name);
- }
+ print_reflection(handle, state, redir, num, proto,
+ &ref_addr, int_addr, ext_addr);
}
fw3_ubus_address_free(int_addrs);
}
void
-fw3_print_redirects(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table)
+fw3_print_redirects(struct fw3_ipt_handle *handle, struct fw3_state *state)
{
int num = 0;
struct fw3_redirect *redir;
- if (family == FW3_FAMILY_V6)
+ if (handle->family == FW3_FAMILY_V6)
return;
- if (table != FW3_TABLE_FILTER && table != FW3_TABLE_NAT)
+ if (handle->table != FW3_TABLE_FILTER && handle->table != FW3_TABLE_NAT)
return;
list_for_each_entry(redir, &state->redirects, list)
- print_redirect(state, family, table, redir, num++);
+ expand_redirect(handle, state, redir, num++);
}
#include "zones.h"
#include "ipsets.h"
#include "ubus.h"
+#include "iptables.h"
extern const struct fw3_option fw3_redirect_opts[];
void fw3_load_redirects(struct fw3_state *state, struct uci_package *p);
-void fw3_print_redirects(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table);
+void fw3_print_redirects(struct fw3_ipt_handle *handle,
+ struct fw3_state *state);
#define fw3_free_redirect(redir) \
fw3_free_object(redir, fw3_redirect_opts)
static void
-print_chain(struct fw3_rule *rule)
+append_chain(struct fw3_ipt_rule *r, struct fw3_rule *rule)
{
- char chain[256];
+ char chain[32];
- sprintf(chain, "delegate_output");
+ snprintf(chain, sizeof(chain), "delegate_output");
if (rule->target == FW3_FLAG_NOTRACK)
{
- sprintf(chain, "zone_%s_notrack", rule->src.name);
+ snprintf(chain, sizeof(chain), "zone_%s_notrack", rule->src.name);
}
else if (rule->target == FW3_FLAG_MARK)
{
- sprintf(chain, "fwmark");
+ snprintf(chain, sizeof(chain), "fwmark");
}
else
{
if (!rule->src.any)
{
if (rule->dest.set)
- sprintf(chain, "zone_%s_forward", rule->src.name);
+ snprintf(chain, sizeof(chain), "zone_%s_forward",
+ rule->src.name);
else
- sprintf(chain, "zone_%s_input", rule->src.name);
+ snprintf(chain, sizeof(chain), "zone_%s_input",
+ rule->src.name);
}
else
{
if (rule->dest.set)
- sprintf(chain, "delegate_forward");
+ snprintf(chain, sizeof(chain), "delegate_forward");
else
- sprintf(chain, "delegate_input");
+ snprintf(chain, sizeof(chain), "delegate_input");
}
}
if (rule->dest.set && !rule->src.set)
- sprintf(chain, "zone_%s_output", rule->dest.name);
+ snprintf(chain, sizeof(chain), "zone_%s_output", rule->dest.name);
}
- fw3_pr("-A %s", chain);
+ fw3_ipt_rule_append(r, chain);
}
-static void print_target(struct fw3_rule *rule)
+static void set_target(struct fw3_ipt_rule *r, struct fw3_rule *rule)
{
- const char *target;
+ const char *name;
+ struct fw3_mark *mark;
+ char buf[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
switch(rule->target)
{
case FW3_FLAG_MARK:
- if (rule->set_mark.set)
- fw3_pr(" -j MARK --set-mark 0x%x/0x%x\n",
- rule->set_mark.mark, rule->set_mark.mask);
- else
- fw3_pr(" -j MARK --set-xmark 0x%x/0x%x\n",
- rule->set_xmark.mark, rule->set_xmark.mask);
+ name = rule->set_mark.set ? "--set-mark" : "--set-xmark";
+ mark = rule->set_mark.set ? &rule->set_mark : &rule->set_xmark;
+ sprintf(buf, "0x%x/0x%x", mark->mark, mark->mask);
+
+ fw3_ipt_rule_target(r, "MARK");
+ fw3_ipt_rule_addarg(r, false, name, buf);
return;
case FW3_FLAG_ACCEPT:
case FW3_FLAG_DROP:
case FW3_FLAG_NOTRACK:
- target = fw3_flag_names[rule->target];
+ name = fw3_flag_names[rule->target];
break;
default:
- target = fw3_flag_names[FW3_FLAG_REJECT];
+ name = fw3_flag_names[FW3_FLAG_REJECT];
break;
}
if (rule->dest.set && !rule->dest.any)
- fw3_pr(" -j zone_%s_dest_%s\n", rule->dest.name, target);
+ fw3_ipt_rule_target(r, "zone_%s_dest_%s", rule->dest.name, name);
else if (rule->target == FW3_FLAG_REJECT)
- fw3_pr(" -j reject\n");
+ fw3_ipt_rule_target(r, "reject");
else
- fw3_pr(" -j %s\n", target);
+ fw3_ipt_rule_target(r, name);
}
static void
-print_rule(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, struct fw3_rule *rule,
- struct fw3_protocol *proto,
+print_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ struct fw3_rule *rule, struct fw3_protocol *proto,
struct fw3_address *sip, struct fw3_address *dip,
struct fw3_port *sport, struct fw3_port *dport,
struct fw3_mac *mac, struct fw3_icmptype *icmptype)
{
- if (!fw3_is_family(sip, family) || !fw3_is_family(dip, family))
+ struct fw3_ipt_rule *r;
+
+ if (!fw3_is_family(sip, handle->family) ||
+ !fw3_is_family(dip, handle->family))
{
info(" ! Skipping due to different family of ip address");
return;
}
- if (proto->protocol == 58 && family == FW3_FAMILY_V4)
+ if (proto->protocol == 58 && handle->family == FW3_FAMILY_V4)
{
info(" ! Skipping due to different family of protocol");
return;
}
- print_chain(rule);
- fw3_format_ipset(rule->_ipset, rule->ipset.invert);
- fw3_format_protocol(proto, family);
- fw3_format_src_dest(sip, dip);
- fw3_format_sport_dport(sport, dport);
- fw3_format_icmptype(icmptype, family);
- fw3_format_mac(mac);
- fw3_format_limit(&rule->limit);
- fw3_format_time(&rule->time);
- fw3_format_mark(&rule->mark);
- fw3_format_extra(rule->extra);
- fw3_format_comment(rule->name);
- print_target(rule);
+ r = fw3_ipt_rule_create(handle, proto, NULL, NULL, sip, dip);
+ fw3_ipt_rule_sport_dport(r, sport, dport);
+ fw3_ipt_rule_icmptype(r, icmptype);
+ fw3_ipt_rule_mac(r, mac);
+ fw3_ipt_rule_ipset(r, rule->_ipset, rule->ipset.invert);
+ fw3_ipt_rule_limit(r, &rule->limit);
+ fw3_ipt_rule_time(r, &rule->time);
+ fw3_ipt_rule_mark(r, &rule->mark);
+ set_target(r, rule);
+ fw3_ipt_rule_extra(r, rule->extra);
+ fw3_ipt_rule_comment(r, rule->name);
+ append_chain(r, rule);
}
static void
-expand_rule(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, struct fw3_rule *rule, int num)
+expand_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ struct fw3_rule *rule, int num)
{
struct fw3_protocol *proto;
struct fw3_address *sip;
struct list_head empty;
INIT_LIST_HEAD(&empty);
- if (!fw3_is_family(rule, family))
+ if (!fw3_is_family(rule, handle->family))
return;
- if ((rule->target == FW3_FLAG_NOTRACK && table != FW3_TABLE_RAW) ||
- (rule->target == FW3_FLAG_MARK && table != FW3_TABLE_MANGLE) ||
- (rule->target < FW3_FLAG_NOTRACK && table != FW3_TABLE_FILTER))
+ if ((rule->target == FW3_FLAG_NOTRACK && handle->table != FW3_TABLE_RAW) ||
+ (rule->target == FW3_FLAG_MARK && handle->table != FW3_TABLE_MANGLE) ||
+ (rule->target < FW3_FLAG_NOTRACK && handle->table != FW3_TABLE_FILTER))
return;
if (rule->name)
else
info(" * Rule #%u", num);
- if (!fw3_is_family(rule->_src, family) ||
- !fw3_is_family(rule->_dest, family))
+ if (!fw3_is_family(rule->_src, handle->family) ||
+ !fw3_is_family(rule->_dest, handle->family))
{
info(" ! Skipping due to different family of zone");
return;
if (rule->_ipset)
{
- if (!fw3_is_family(rule->_ipset, family))
+ if (!fw3_is_family(rule->_ipset, handle->family))
{
info(" ! Skipping due to different family in ipset");
return;
return;
}
- set(rule->_ipset->flags, family, family);
+ set(rule->_ipset->flags, handle->family, handle->family);
}
list_for_each_entry(proto, &rule->proto, list)
fw3_foreach(dport, dports)
fw3_foreach(mac, &rule->mac_src)
fw3_foreach(icmptype, icmptypes)
- print_rule(state, family, table, rule, proto, sip, dip,
+ print_rule(handle, state, rule, proto, sip, dip,
sport, dport, mac, icmptype);
}
}
void
-fw3_print_rules(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table)
+fw3_print_rules(struct fw3_ipt_handle *handle, struct fw3_state *state)
{
int num = 0;
struct fw3_rule *rule;
list_for_each_entry(rule, &state->rules, list)
- expand_rule(state, family, table, rule, num++);
+ expand_rule(handle, state, rule, num++);
}
#include "zones.h"
#include "ipsets.h"
#include "utils.h"
+#include "iptables.h"
extern const struct fw3_option fw3_rule_opts[];
void fw3_load_rules(struct fw3_state *state, struct uci_package *p);
-void fw3_print_rules(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table);
+void fw3_print_rules(struct fw3_ipt_handle *handle, struct fw3_state *state);
#define fw3_free_rule(rule) \
fw3_free_object(rule, fw3_rule_opts)
fprintf(stderr, "\n");
}
+void *
+fw3_alloc(size_t size)
+{
+ void *mem;
+
+ mem = calloc(1, size);
+
+ if (!mem)
+ error("Out of memory while allocating %d bytes", size);
+
+ return mem;
+}
+
+char *
+fw3_strdup(const char *s)
+{
+ char *ns;
+
+ ns = strdup(s);
+
+ if (!ns)
+ error("Out of memory while duplicating string '%s'", s);
+
+ return ns;
+}
+
const char *
fw3_find_command(const char *cmd)
{
(1<<FW3_TABLE_MANGLE)|(1<<FW3_TABLE_RAW))))
+void * fw3_alloc(size_t size);
+char * fw3_strdup(const char *s);
+
const char * fw3_find_command(const char *cmd);
bool fw3_stdout_pipe(void);
{ FW3_FAMILY_##f, FW3_TABLE_##tbl, FW3_FLAG_##tgt, fmt }
static const struct fw3_rule_spec zone_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, UNSPEC, "zone_%s_input"),
+ C(ANY, FILTER, UNSPEC, "zone_%s_output"),
+ C(ANY, FILTER, UNSPEC, "zone_%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$s_src_DROP"),
+ C(ANY, FILTER, SRC_ACCEPT, "zone_%s_src_ACCEPT"),
+ C(ANY, FILTER, SRC_REJECT, "zone_%s_src_REJECT"),
+ C(ANY, FILTER, SRC_DROP, "zone_%s_src_DROP"),
- C(ANY, FILTER, ACCEPT, "zone_%1$s_dest_ACCEPT"),
- C(ANY, FILTER, REJECT, "zone_%1$s_dest_REJECT"),
- C(ANY, FILTER, DROP, "zone_%1$s_dest_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_%1$s_postrouting"),
- C(V4, NAT, DNAT, "zone_%1$s_prerouting"),
+ C(V4, NAT, SNAT, "zone_%s_postrouting"),
+ C(V4, NAT, DNAT, "zone_%s_prerouting"),
- C(ANY, FILTER, CUSTOM_CHAINS, "input_%1$s_rule"),
- C(ANY, FILTER, CUSTOM_CHAINS, "output_%1$s_rule"),
- C(ANY, FILTER, CUSTOM_CHAINS, "forwarding_%1$s_rule"),
+ C(ANY, FILTER, CUSTOM_CHAINS, "input_%s_rule"),
+ C(ANY, FILTER, CUSTOM_CHAINS, "output_%s_rule"),
+ C(ANY, FILTER, CUSTOM_CHAINS, "forwarding_%s_rule"),
- C(V4, NAT, CUSTOM_CHAINS, "prerouting_%1$s_rule"),
- C(V4, NAT, CUSTOM_CHAINS, "postrouting_%1$s_rule"),
-
- { }
-};
-
-
-#define R(dir1, dir2) \
- "zone_%1$s_" #dir1 " -m comment --comment \"user chain for %1$s " \
- #dir2 "\" -j " #dir2 "_%1$s_rule"
-
-static const struct fw3_rule_spec zone_rules[] = {
- C(ANY, FILTER, CUSTOM_CHAINS, R(input, input)),
- C(ANY, FILTER, CUSTOM_CHAINS, R(output, output)),
- C(ANY, FILTER, CUSTOM_CHAINS, R(forward, forwarding)),
-
- C(V4, NAT, CUSTOM_CHAINS, R(prerouting, prerouting)),
- C(V4, NAT, CUSTOM_CHAINS, R(postrouting, postrouting)),
+ C(V4, NAT, CUSTOM_CHAINS, "prerouting_%s_rule"),
+ C(V4, NAT, CUSTOM_CHAINS, "postrouting_%s_rule"),
{ }
};
static void
-print_zone_chain(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload, struct fw3_zone *zone)
+print_zone_chain(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ bool reload, struct fw3_zone *zone)
{
- bool c, r;
- uint32_t custom_mask = ~0;
+ int i;
+ struct fw3_ipt_rule *r;
+ const struct fw3_rule_spec *c;
+
+ const char *flt_chains[] = {
+ "input", "input",
+ "output", "output",
+ "forward", "forwarding",
+ };
- if (!fw3_is_family(zone, family))
+ const char *nat_chains[] = {
+ "prerouting", "prerouting",
+ "postrouting", "postrouting",
+ };
+
+ if (!fw3_is_family(zone, handle->family))
return;
- set(zone->flags, family, table);
+ info(" * Zone '%s'", zone->name);
- /* Don't touch user chains on reload */
- if (reload)
- delbit(custom_mask, FW3_FLAG_CUSTOM_CHAINS);
+ set(zone->flags, handle->family, handle->table);
if (zone->custom_chains)
- set(zone->flags, family, FW3_FLAG_CUSTOM_CHAINS);
+ set(zone->flags, handle->family, FW3_FLAG_CUSTOM_CHAINS);
if (!zone->conntrack && !state->defaults.drop_invalid)
- set(zone->flags, family, FW3_FLAG_NOTRACK);
+ set(zone->flags, handle->family, FW3_FLAG_NOTRACK);
- c = fw3_pr_rulespec(table, family, zone->flags, custom_mask, zone_chains,
- ":%s - [0:0]\n", zone->name);
+ for (c = zone_chains; c->format; c++)
+ {
+ /* don't touch user chains on selective stop */
+ if (reload && c->flag == FW3_FLAG_CUSTOM_CHAINS)
+ continue;
- r = fw3_pr_rulespec(table, family, zone->flags, 0, zone_rules,
- "-A %s\n", zone->name);
+ if (!fw3_is_family(c, handle->family))
+ continue;
- if (c || r)
- {
- info(" * Zone '%s'", zone->name);
+ if (c->table != handle->table)
+ continue;
- set(zone->flags, family, table);
+ if (c->flag &&
+ !hasbit(zone->flags[handle->family == FW3_FAMILY_V6], c->flag))
+ continue;
+
+ fw3_ipt_create_chain(handle, c->format, zone->name);
}
+
+ if (zone->custom_chains)
+ {
+ 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(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload, struct fw3_zone *zone,
+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)
{
bool disable_notrack = state->defaults.drop_invalid;
-
+ 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_FLAG_REJECT) ? "reject" : fw3_flag_names[t])
- if (table == FW3_TABLE_FILTER)
+ if (handle->table == FW3_TABLE_FILTER)
{
for (t = FW3_FLAG_ACCEPT; t <= FW3_FLAG_DROP; t++)
{
- if (has(zone->flags, family, 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_append(r, "zone_%s_src_%s", zone->name,
+ fw3_flag_names[t]);
}
- if (has(zone->flags, family, 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_append(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_append(r, "delegate_%s", chains[i]);
+ }
}
- else if (table == FW3_TABLE_NAT)
+ else if (handle->table == FW3_TABLE_NAT)
{
- if (has(zone->flags, family, FW3_FLAG_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_append(r, "delegate_prerouting");
}
- if (has(zone->flags, family, FW3_FLAG_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_append(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_append(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_append(r, "mssfix");
}
}
- else if (table == FW3_TABLE_RAW)
+ else if (handle->table == FW3_TABLE_RAW)
{
if (!zone->conntrack && !disable_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, "CT");
+ fw3_ipt_rule_addarg(r, false, "--notrack", NULL);
+ fw3_ipt_rule_extra(r, zone->extra_src);
+ fw3_ipt_rule_append(r, "notrack");
}
}
}
static void
-print_interface_rules(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload, struct fw3_zone *zone)
+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(state, family, table, reload, zone, dev, sub);
+ print_interface_rule(handle, state, reload, zone, dev, sub);
}
}
static void
-print_zone_rule(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload, struct fw3_zone *zone)
+print_zone_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
+ bool reload, struct fw3_zone *zone)
{
struct fw3_address *msrc;
struct fw3_address *mdest;
+ struct fw3_ipt_rule *r;
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]);
+ 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_FLAG_REJECT; t <= FW3_FLAG_DROP; t++)
{
- if (has(zone->flags, family, 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 (has(zone->flags, family, 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)
{
- if (!fw3_is_family(msrc, family) ||
- !fw3_is_family(mdest, family))
+ if (!fw3_is_family(msrc, handle->family) ||
+ !fw3_is_family(mdest, handle->family))
continue;
- fw3_pr("-A zone_%s_postrouting", zone->name);
- fw3_format_src_dest(msrc, mdest);
- fw3_pr(" -j MASQUERADE\n");
+ 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;
break;
}
- print_interface_rules(state, family, table, reload, zone);
+ print_interface_rules(handle, state, reload, zone);
}
void
-fw3_print_zone_chains(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload)
+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(state, family, table, reload, zone);
+ print_zone_chain(handle, state, reload, zone);
}
void
-fw3_print_zone_rules(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload)
+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(state, family, table, reload, zone);
+ print_zone_rule(handle, state, reload, zone);
}
void
void fw3_load_zones(struct fw3_state *state, struct uci_package *p);
-void fw3_print_zone_chains(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload);
+void fw3_print_zone_chains(struct fw3_ipt_handle *handle,
+ struct fw3_state *state, bool reload);
-void fw3_print_zone_rules(struct fw3_state *state, enum fw3_family family,
- enum fw3_table table, bool reload);
+void fw3_print_zone_rules(struct fw3_ipt_handle *handle,
+ struct fw3_state *state, bool reload);
void fw3_flush_zones(struct fw3_ipt_handle *handle, struct fw3_state *state,
bool reload);
projects / oweals / firewall3.git / commitdiff