check.c revision e608c9829f664274d86ff1451224f877f5330b39
/*
* Copyright (C) 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and 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 INTERNET SOFTWARE CONSORTIUM
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
* INTERNET SOFTWARE CONSORTIUM 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.
*/
/* $Id: check.c,v 1.9 2001/03/09 19:07:30 bwelling Exp $ */
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <isc/log.h>
#include <isc/result.h>
#include <isc/symtab.h>
#include <isc/util.h>
#include <isccfg/cfg.h>
#include <isccfg/check.h>
static isc_result_t
check_forward(cfg_obj_t *options, isc_log_t *logctx) {
cfg_obj_t *forward = NULL;
cfg_obj_t *forwarders = NULL;
(void)cfg_map_get(options, "forward", &forward);
(void)cfg_map_get(options, "forwarders", &forwarders);
if (forward != NULL && forwarders == NULL) {
cfg_obj_log(forward, logctx, ISC_LOG_ERROR,
"no matching 'forwarders' statement");
return (ISC_R_FAILURE);
}
return (ISC_R_SUCCESS);
}
#define MASTERZONE 1
#define SLAVEZONE 2
#define STUBZONE 4
#define HINTZONE 8
#define FORWARDZONE 16
typedef struct {
const char *name;
int allowed;
} optionstable;
static isc_result_t
check_zoneconf(cfg_obj_t *zconfig, isc_symtab_t *symtab, isc_log_t *logctx) {
const char *zname;
const char *typestr;
unsigned int ztype;
cfg_obj_t *zoptions;
cfg_obj_t *obj = NULL;
isc_symvalue_t symvalue;
isc_result_t result = ISC_R_SUCCESS;
isc_result_t tresult;
unsigned int i;
static optionstable options[] = {
{ "allow-query", MASTERZONE | SLAVEZONE | STUBZONE },
{ "allow-transfer", MASTERZONE | SLAVEZONE | STUBZONE },
{ "notify", MASTERZONE | SLAVEZONE },
{ "also-notify", MASTERZONE | SLAVEZONE },
{ "dialup", MASTERZONE | SLAVEZONE | STUBZONE },
{ "forward", MASTERZONE | SLAVEZONE | STUBZONE | FORWARDZONE},
{ "forwarders", MASTERZONE | SLAVEZONE | STUBZONE | FORWARDZONE},
{ "maintain-ixfr-base", MASTERZONE | SLAVEZONE },
{ "max-ixfr-log-size", MASTERZONE | SLAVEZONE },
{ "transfer-source", MASTERZONE | SLAVEZONE | STUBZONE },
{ "transfer-source-v6", MASTERZONE | SLAVEZONE | STUBZONE },
{ "max-transfer-time-in", SLAVEZONE | STUBZONE },
{ "max-transfer-time-out", MASTERZONE | SLAVEZONE },
{ "max-transfer-idle-in", SLAVEZONE | STUBZONE },
{ "max-transfer-idle-out", MASTERZONE | SLAVEZONE },
{ "max-retry-time", SLAVEZONE | STUBZONE },
{ "min-retry-time", SLAVEZONE | STUBZONE },
{ "max-refresh-time", SLAVEZONE | STUBZONE },
{ "min-refresh-time", SLAVEZONE | STUBZONE },
{ "sig-validity-interval", MASTERZONE },
{ "zone-statistics", MASTERZONE | SLAVEZONE | STUBZONE },
{ "allow-update", MASTERZONE },
{ "allow-update-forwarding", SLAVEZONE },
{ "file", MASTERZONE | SLAVEZONE | STUBZONE | HINTZONE},
{ "ixfr-base", MASTERZONE | SLAVEZONE },
{ "ixfr-tmp-file", MASTERZONE | SLAVEZONE },
{ "masters", SLAVEZONE | STUBZONE },
{ "pubkey", MASTERZONE | SLAVEZONE | STUBZONE },
{ "update-policy", MASTERZONE },
{ "database", MASTERZONE | SLAVEZONE | STUBZONE },
};
static optionstable dialups[] = {
{ "notify", MASTERZONE | SLAVEZONE },
{ "notify-passive", SLAVEZONE },
{ "refresh", SLAVEZONE | STUBZONE },
{ "passive", SLAVEZONE | STUBZONE },
};
zname = cfg_obj_asstring(cfg_tuple_get(zconfig, "name"));
zoptions = cfg_tuple_get(zconfig, "options");
obj = NULL;
(void)cfg_map_get(zoptions, "type", &obj);
if (obj == NULL) {
cfg_obj_log(zconfig, logctx, ISC_LOG_ERROR,
"zone '%s': type not present", zname);
return (ISC_R_FAILURE);
}
typestr = cfg_obj_asstring(obj);
if (strcasecmp(typestr, "master") == 0)
ztype = MASTERZONE;
else if (strcasecmp(typestr, "slave") == 0)
ztype = SLAVEZONE;
else if (strcasecmp(typestr, "stub") == 0)
ztype = STUBZONE;
else if (strcasecmp(typestr, "forward") == 0)
ztype = FORWARDZONE;
else if (strcasecmp(typestr, "hint") == 0)
ztype = HINTZONE;
else {
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
"zone '%s': invalid type %s",
zname, typestr);
return (ISC_R_FAILURE);
}
/*
* Look for an already existing zone.
*/
symvalue.as_pointer = NULL;
tresult = isc_symtab_define(symtab, zname,
ztype == HINTZONE ? 1 : 2,
symvalue, isc_symexists_reject);
if (tresult == ISC_R_EXISTS) {
cfg_obj_log(zconfig, logctx, ISC_LOG_ERROR,
"zone '%s': already exists ", zname);
result = ISC_R_FAILURE;
} else if (tresult != ISC_R_SUCCESS)
return (tresult);
/*
* Look for inappropriate options for the given zone type.
*/
for (i = 0; i < sizeof(options) / sizeof(options[0]); i++) {
obj = NULL;
if ((options[i].allowed & ztype) == 0 &&
cfg_map_get(zoptions, options[i].name, &obj) ==
ISC_R_SUCCESS)
{
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
"option '%s' is not allowed in '%s' "
"zone '%s'",
options[i].name, typestr, zname);
result = ISC_R_FAILURE;
}
}
/*
* Slave & stub zones must have a "masters" field.
*/
if (ztype == SLAVEZONE || ztype == STUBZONE) {
obj = NULL;
if (cfg_map_get(zoptions, "masters", &obj) != ISC_R_SUCCESS) {
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
"zone '%s': missing 'masters' entry",
zname);
result = ISC_R_FAILURE;
}
}
/*
* Master zones can't have both "allow-update" and "update-policy".
*/
if (ztype == MASTERZONE) {
isc_result_t res1, res2;
obj = NULL;
res1 = cfg_map_get(zoptions, "allow-update", &obj);
obj = NULL;
res2 = cfg_map_get(zoptions, "update-policy", &obj);
if (res1 == ISC_R_SUCCESS && res2 == ISC_R_SUCCESS) {
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
"zone '%s': 'allow-update' is ignored "
"when 'update-policy' is present",
zname);
result = ISC_R_FAILURE;
}
}
/*
* Check the excessively complicated "dialup" option.
*/
if (ztype == MASTERZONE || ztype == SLAVEZONE || ztype == STUBZONE) {
cfg_obj_t *dialup = NULL;
cfg_map_get(zoptions, "dialup", &dialup);
if (dialup != NULL && cfg_obj_isstring(dialup)) {
char *str = cfg_obj_asstring(dialup);
for (i = 0;
i < sizeof(dialups) / sizeof(dialups[0]);
i++)
{
if (strcasecmp(dialups[i].name, str) != 0)
continue;
if ((dialups[i].allowed & ztype) == 0) {
cfg_obj_log(obj, logctx,
ISC_LOG_ERROR,
"dialup type '%s' is not "
"allowed in '%s' "
"zone '%s'",
str, typestr, zname);
result = ISC_R_FAILURE;
}
break;
}
if (i == sizeof(dialups) / sizeof(dialups[0])) {
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
"invalid dialup type '%s' in zone "
"'%s'", str, zname);
result = ISC_R_FAILURE;
}
}
}
/*
* Check that forwarding is reasonable.
*/
if (check_forward(zoptions, logctx) != ISC_R_SUCCESS)
result = ISC_R_FAILURE;
return (result);
}
static isc_result_t
check_viewconf(cfg_obj_t *vconfig, const char *vname, isc_log_t *logctx,
isc_mem_t *mctx)
{
cfg_obj_t *zones = NULL;
cfg_obj_t *keys = NULL;
cfg_listelt_t *element;
isc_symtab_t *symtab = NULL;
isc_result_t result = ISC_R_SUCCESS;
isc_result_t tresult = ISC_R_SUCCESS;
/*
* Check that all zone statements are syntactically correct and
* there are no duplicate zones.
*/
tresult = isc_symtab_create(mctx, 100, NULL, NULL, ISC_TRUE, &symtab);
if (tresult != ISC_R_SUCCESS)
return (ISC_R_NOMEMORY);
(void)cfg_map_get(vconfig, "zone", &zones);
for (element = cfg_list_first(zones);
element != NULL;
element = cfg_list_next(element))
{
cfg_obj_t *zone = cfg_listelt_value(element);
if (check_zoneconf(zone, symtab, logctx) != ISC_R_SUCCESS)
result = ISC_R_FAILURE;
}
isc_symtab_destroy(&symtab);
/*
* Check that all key statements are syntactically correct and
* there are no duplicate keys.
*/
tresult = isc_symtab_create(mctx, 100, NULL, NULL, ISC_TRUE, &symtab);
if (tresult != ISC_R_SUCCESS)
return (ISC_R_NOMEMORY);
(void)cfg_map_get(vconfig, "key", &keys);
for (element = cfg_list_first(keys);
element != NULL;
element = cfg_list_next(element))
{
cfg_obj_t *key = cfg_listelt_value(element);
const char *keyname = cfg_obj_asstring(cfg_map_getname(key));
cfg_obj_t *algobj = NULL;
cfg_obj_t *secretobj = NULL;
isc_symvalue_t symvalue;
symvalue.as_pointer = NULL;
tresult = isc_symtab_define(symtab, keyname, 1,
symvalue, isc_symexists_reject);
if (tresult == ISC_R_EXISTS) {
cfg_obj_log(key, logctx, ISC_LOG_ERROR,
"key '%s': already exists ", keyname);
result = ISC_R_FAILURE;
} else if (tresult != ISC_R_SUCCESS) {
isc_symtab_destroy(&symtab);
return (tresult);
}
cfg_map_get(key, "algorithm", &algobj);
cfg_map_get(key, "secret", &secretobj);
if (secretobj == NULL || algobj == NULL) {
cfg_obj_log(key, logctx, ISC_LOG_ERROR,
"key '%s' must have both 'secret' and "
"algorithm defined",
keyname);
result = ISC_R_FAILURE;
}
}
isc_symtab_destroy(&symtab);
/*
* Check that forwarding is reasonable.
*/
if (strcmp(vname, "_default") == 0) {
cfg_obj_t *options = NULL;
cfg_map_get(vconfig, "options", &options);
if (options != NULL)
if (check_forward(options, logctx) != ISC_R_SUCCESS)
result = ISC_R_FAILURE;
} else {
if (check_forward(vconfig, logctx) != ISC_R_SUCCESS)
result = ISC_R_FAILURE;
}
return (result);
}
isc_result_t
cfg_check_namedconf(cfg_obj_t *config, isc_log_t *logctx, isc_mem_t *mctx) {
cfg_obj_t *options = NULL;
cfg_obj_t *views = NULL;
cfg_obj_t *obj;
cfg_listelt_t *velement;
isc_result_t result = ISC_R_SUCCESS;
isc_result_t tresult;
(void)cfg_map_get(config, "options", &options);
(void)cfg_map_get(config, "view", &views);
if (views == NULL) {
if (check_viewconf(config, "_default", logctx, mctx)
!= ISC_R_SUCCESS)
result = ISC_R_FAILURE;
} else {
cfg_obj_t *zones = NULL;
cfg_obj_t *peers = NULL;
(void)cfg_map_get(config, "zone", &zones);
if (zones != NULL) {
cfg_obj_log(zones, logctx, ISC_LOG_ERROR,
"when using 'view' statements, "
"all zones must be in views");
result = ISC_R_FAILURE;
}
(void)cfg_map_get(config, "server", &peers);
if (peers != NULL) {
cfg_obj_log(zones, logctx, ISC_LOG_ERROR,
"when using 'view' statements, "
"all server statements must be in views");
result = ISC_R_FAILURE;
}
}
for (velement = cfg_list_first(views);
velement != NULL;
velement = cfg_list_next(velement))
{
cfg_obj_t *view = cfg_listelt_value(velement);
cfg_obj_t *vname = cfg_tuple_get(view, "name");
cfg_obj_t *voptions = cfg_tuple_get(view, "options");
if (check_viewconf(voptions, cfg_obj_asstring(vname), logctx,
mctx) != ISC_R_SUCCESS)
result = ISC_R_FAILURE;
}
if (views != NULL && options != NULL) {
obj = NULL;
tresult = cfg_map_get(options, "cache-file", &obj);
if (tresult == ISC_R_SUCCESS) {
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
"'cache-file' cannot be a global "
"option if views are present");
result = ISC_R_FAILURE;
}
}
if (options != NULL) {
/*
* Check that max-cache-size does not have the illegal value
* 'default'.
*/
obj = NULL;
tresult = cfg_map_get(options, "max-cache-size", &obj);
if (tresult == ISC_R_SUCCESS &&
cfg_obj_isstring(obj))
{
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
"'max-cache-size' cannot have the "
"value 'default'");
result = ISC_R_FAILURE;
}
}
return (result);
}