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/*
* firewall3 - 3rd OpenWrt UCI firewall implementation
*
* Copyright (C) 2013 Jo-Philipp Wich <jo@mein.io>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "includes.h"
const struct fw3_option fw3_include_opts[] = {
FW3_OPT("enabled", bool, include, enabled),
FW3_OPT("path", string, include, path),
FW3_OPT("type", include_type, include, type),
FW3_OPT("family", family, include, family),
FW3_OPT("reload", bool, include, reload),
{ }
};
static bool
check_include(struct fw3_state *state, struct fw3_include *include, struct uci_element *e)
{
if (!include->enabled)
return false;
if (!include->path)
{
warn_section("include", include, e, "must specify a path");
return false;
}
if (include->type == FW3_INC_TYPE_RESTORE && !include->family)
warn_section("include", include, e, "does not specify a family, include will get"
"loaded with both iptables-restore and ip6tables-restore!");
return true;
}
static struct fw3_include *
fw3_alloc_include(struct fw3_state *state)
{
struct fw3_include *include;
include = calloc(1, sizeof(*include));
if (!include)
return NULL;
include->enabled = true;
list_add_tail(&include->list, &state->includes);
return include;
}
void
fw3_load_includes(struct fw3_state *state, struct uci_package *p,
struct blob_attr *a)
{
struct uci_section *s;
struct uci_element *e;
struct fw3_include *include;
struct blob_attr *entry;
unsigned rem;
INIT_LIST_HEAD(&state->includes);
blob_for_each_attr(entry, a, rem)
{
const char *type;
const char *name = "ubus include";
if (!fw3_attr_parse_name_type(entry, &name, &type))
continue;
if (strcmp(type, "script") && strcmp(type, "restore"))
continue;
include = fw3_alloc_include(state);
if (!include)
continue;
if (!fw3_parse_blob_options(include, fw3_include_opts, entry, name))
{
warn_section("include", include, NULL, "skipped due to invalid options");
fw3_free_include(include);
continue;
}
if (!check_include(state, include, NULL))
fw3_free_include(include);
}
uci_foreach_element(&p->sections, e)
{
s = uci_to_section(e);
if (strcmp(s->type, "include"))
continue;
include = fw3_alloc_include(state);
if (!include)
continue;
include->name = e->name;
if (!fw3_parse_options(include, fw3_include_opts, s))
warn_elem(e, "has invalid options");
if (!check_include(state, include, e))
fw3_free_include(include);
}
}
static void
print_include(struct fw3_include *include)
{
FILE *f;
char line[1024];
info(" * Loading include '%s'", include->path);
if (!(f = fopen(include->path, "r")))
{
info(" ! Skipping due to open error: %s", strerror(errno));
return;
}
while (fgets(line, sizeof(line), f))
fw3_pr("%s", line);
fclose(f);
}
void
fw3_print_includes(struct fw3_state *state, enum fw3_family family, bool reload)
{
struct fw3_include *include;
bool exec = false;
const char *restore = "iptables-restore";
if (family == FW3_FAMILY_V6)
restore = "ip6tables-restore";
list_for_each_entry(include, &state->includes, list)
{
if (reload && !include->reload)
continue;
if (include->type != FW3_INC_TYPE_RESTORE)
continue;
if (!fw3_is_family(include, family))
continue;
if (!exec)
{
exec = fw3_command_pipe(false, restore, "--noflush");
if (!exec)
return;
}
print_include(include);
}
if (exec)
fw3_command_close();
}
#define TEMPLATE "config() { echo \"You cannot use UCI in firewall includes!\" >&2; exit 1; }; . %s"
static void
run_include(struct fw3_include *include)
{
int rv;
struct stat s;
char buf[PATH_MAX + sizeof(TEMPLATE)];
info(" * Running script '%s'", include->path);
if (stat(include->path, &s))
{
info(" ! Skipping due to path error: %s", strerror(errno));
return;
}
snprintf(buf, sizeof(buf), TEMPLATE, include->path);
rv = system(buf);
if (rv)
info(" ! Failed with exit code %u", WEXITSTATUS(rv));
}
void
fw3_run_includes(struct fw3_state *state, bool reload)
{
struct fw3_include *include;
list_for_each_entry(include, &state->includes, list)
{
if (reload && !include->reload)
continue;
if (include->type == FW3_INC_TYPE_SCRIPT)
run_include(include);
}
}
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