check-tool.c revision 307d2084502eddc7ce921e5ce439aec3531d90e0
/*
* Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2000-2002 Internet Software Consortium.
*
* 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 ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC 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-tool.c,v 1.39 2009/09/01 00:22:24 jinmei Exp $ */
/*! \file */
#include <config.h>
#include <stdio.h>
#include "check-tool.h"
#include <isc/buffer.h>
#include <isc/log.h>
#include <isc/mem.h>
#include <isc/netdb.h>
#include <isc/net.h>
#include <isc/region.h>
#include <isc/stdio.h>
#include <isc/string.h>
#include <isc/symtab.h>
#include <isc/types.h>
#include <isc/util.h>
#include <dns/fixedname.h>
#include <dns/log.h>
#include <dns/name.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/rdataset.h>
#include <dns/types.h>
#include <dns/zone.h>
#include <isccfg/log.h>
#ifndef CHECK_SIBLING
#define CHECK_SIBLING 1
#endif
#ifndef CHECK_LOCAL
#define CHECK_LOCAL 1
#endif
#ifdef HAVE_ADDRINFO
#ifdef HAVE_GETADDRINFO
#ifdef HAVE_GAISTRERROR
#define USE_GETADDRINFO
#endif
#endif
#endif
#define CHECK(r) \
do { \
result = (r); \
if (result != ISC_R_SUCCESS) \
goto cleanup; \
} while (0)
#define ERR_IS_CNAME 1
#define ERR_NO_ADDRESSES 2
#define ERR_LOOKUP_FAILURE 3
#define ERR_EXTRA_A 4
#define ERR_EXTRA_AAAA 5
#define ERR_MISSING_GLUE 5
#define ERR_IS_MXCNAME 6
#define ERR_IS_SRVCNAME 7
static const char *dbtype[] = { "rbt" };
int debug = 0;
isc_boolean_t nomerge = ISC_TRUE;
#if CHECK_LOCAL
isc_boolean_t docheckmx = ISC_TRUE;
isc_boolean_t dochecksrv = ISC_TRUE;
isc_boolean_t docheckns = ISC_TRUE;
#else
isc_boolean_t docheckmx = ISC_FALSE;
isc_boolean_t dochecksrv = ISC_FALSE;
isc_boolean_t docheckns = ISC_FALSE;
#endif
unsigned int zone_options = DNS_ZONEOPT_CHECKNS |
DNS_ZONEOPT_CHECKMX |
DNS_ZONEOPT_MANYERRORS |
DNS_ZONEOPT_CHECKNAMES |
DNS_ZONEOPT_CHECKINTEGRITY |
#if CHECK_SIBLING
DNS_ZONEOPT_CHECKSIBLING |
#endif
DNS_ZONEOPT_CHECKWILDCARD |
DNS_ZONEOPT_WARNMXCNAME |
DNS_ZONEOPT_WARNSRVCNAME;
/*
* This needs to match the list in bin/named/log.c.
*/
static isc_logcategory_t categories[] = {
{ "", 0 },
{ "client", 0 },
{ "network", 0 },
{ "update", 0 },
{ "queries", 0 },
{ "unmatched", 0 },
{ "update-security", 0 },
{ "query-errors", 0 },
{ NULL, 0 }
};
static isc_symtab_t *symtab = NULL;
static isc_mem_t *sym_mctx;
static void
freekey(char *key, unsigned int type, isc_symvalue_t value, void *userarg) {
UNUSED(type);
UNUSED(value);
isc_mem_free(userarg, key);
}
static void
add(char *key, int value) {
isc_result_t result;
isc_symvalue_t symvalue;
if (sym_mctx == NULL) {
result = isc_mem_create(0, 0, &sym_mctx);
if (result != ISC_R_SUCCESS)
return;
}
if (symtab == NULL) {
result = isc_symtab_create(sym_mctx, 100, freekey, sym_mctx,
ISC_FALSE, &symtab);
if (result != ISC_R_SUCCESS)
return;
}
key = isc_mem_strdup(sym_mctx, key);
if (key == NULL)
return;
symvalue.as_pointer = NULL;
result = isc_symtab_define(symtab, key, value, symvalue,
isc_symexists_reject);
if (result != ISC_R_SUCCESS)
isc_mem_free(sym_mctx, key);
}
static isc_boolean_t
logged(char *key, int value) {
isc_result_t result;
if (symtab == NULL)
return (ISC_FALSE);
result = isc_symtab_lookup(symtab, key, value, NULL);
if (result == ISC_R_SUCCESS)
return (ISC_TRUE);
return (ISC_FALSE);
}
static isc_boolean_t
checkns(dns_zone_t *zone, dns_name_t *name, dns_name_t *owner,
dns_rdataset_t *a, dns_rdataset_t *aaaa)
{
#ifdef USE_GETADDRINFO
dns_rdataset_t *rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
struct addrinfo hints, *ai, *cur;
char namebuf[DNS_NAME_FORMATSIZE + 1];
char ownerbuf[DNS_NAME_FORMATSIZE];
char addrbuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:123.123.123.123")];
isc_boolean_t answer = ISC_TRUE;
isc_boolean_t match;
const char *type;
void *ptr = NULL;
int result;
REQUIRE(a == NULL || !dns_rdataset_isassociated(a) ||
a->type == dns_rdatatype_a);
REQUIRE(aaaa == NULL || !dns_rdataset_isassociated(aaaa) ||
aaaa->type == dns_rdatatype_aaaa);
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
dns_name_format(name, namebuf, sizeof(namebuf) - 1);
/*
* Turn off search.
*/
if (dns_name_countlabels(name) > 1U)
strcat(namebuf, ".");
dns_name_format(owner, ownerbuf, sizeof(ownerbuf));
result = getaddrinfo(namebuf, NULL, &hints, &ai);
dns_name_format(name, namebuf, sizeof(namebuf) - 1);
switch (result) {
case 0:
/*
* Work around broken getaddrinfo() implementations that
* fail to set ai_canonname on first entry.
*/
cur = ai;
while (cur != NULL && cur->ai_canonname == NULL &&
cur->ai_next != NULL)
cur = cur->ai_next;
if (cur != NULL && cur->ai_canonname != NULL &&
strcasecmp(cur->ai_canonname, namebuf) != 0 &&
!logged(namebuf, ERR_IS_CNAME)) {
dns_zone_log(zone, ISC_LOG_ERROR,
"%s/NS '%s' (out of zone) "
"is a CNAME '%s' (illegal)",
ownerbuf, namebuf,
cur->ai_canonname);
/* XXX950 make fatal for 9.5.0 */
/* answer = ISC_FALSE; */
add(namebuf, ERR_IS_CNAME);
}
break;
case EAI_NONAME:
#if defined(EAI_NODATA) && (EAI_NODATA != EAI_NONAME)
case EAI_NODATA:
#endif
if (!logged(namebuf, ERR_NO_ADDRESSES)) {
dns_zone_log(zone, ISC_LOG_ERROR,
"%s/NS '%s' (out of zone) "
"has no addresses records (A or AAAA)",
ownerbuf, namebuf);
add(namebuf, ERR_NO_ADDRESSES);
}
/* XXX950 make fatal for 9.5.0 */
return (ISC_TRUE);
default:
if (!logged(namebuf, ERR_LOOKUP_FAILURE)) {
dns_zone_log(zone, ISC_LOG_WARNING,
"getaddrinfo(%s) failed: %s",
namebuf, gai_strerror(result));
add(namebuf, ERR_LOOKUP_FAILURE);
}
return (ISC_TRUE);
}
if (a == NULL || aaaa == NULL)
return (answer);
/*
* Check that all glue records really exist.
*/
if (!dns_rdataset_isassociated(a))
goto checkaaaa;
result = dns_rdataset_first(a);
while (result == ISC_R_SUCCESS) {
dns_rdataset_current(a, &rdata);
match = ISC_FALSE;
for (cur = ai; cur != NULL; cur = cur->ai_next) {
if (cur->ai_family != AF_INET)
continue;
ptr = &((struct sockaddr_in *)(cur->ai_addr))->sin_addr;
if (memcmp(ptr, rdata.data, rdata.length) == 0) {
match = ISC_TRUE;
break;
}
}
if (!match && !logged(namebuf, ERR_EXTRA_A)) {
dns_zone_log(zone, ISC_LOG_ERROR, "%s/NS '%s' "
"extra GLUE A record (%s)",
ownerbuf, namebuf,
inet_ntop(AF_INET, rdata.data,
addrbuf, sizeof(addrbuf)));
add(namebuf, ERR_EXTRA_A);
/* XXX950 make fatal for 9.5.0 */
/* answer = ISC_FALSE; */
}
dns_rdata_reset(&rdata);
result = dns_rdataset_next(a);
}
checkaaaa:
if (!dns_rdataset_isassociated(aaaa))
goto checkmissing;
result = dns_rdataset_first(aaaa);
while (result == ISC_R_SUCCESS) {
dns_rdataset_current(aaaa, &rdata);
match = ISC_FALSE;
for (cur = ai; cur != NULL; cur = cur->ai_next) {
if (cur->ai_family != AF_INET6)
continue;
ptr = &((struct sockaddr_in6 *)(cur->ai_addr))->sin6_addr;
if (memcmp(ptr, rdata.data, rdata.length) == 0) {
match = ISC_TRUE;
break;
}
}
if (!match && !logged(namebuf, ERR_EXTRA_AAAA)) {
dns_zone_log(zone, ISC_LOG_ERROR, "%s/NS '%s' "
"extra GLUE AAAA record (%s)",
ownerbuf, namebuf,
inet_ntop(AF_INET6, rdata.data,
addrbuf, sizeof(addrbuf)));
add(namebuf, ERR_EXTRA_AAAA);
/* XXX950 make fatal for 9.5.0. */
/* answer = ISC_FALSE; */
}
dns_rdata_reset(&rdata);
result = dns_rdataset_next(aaaa);
}
checkmissing:
/*
* Check that all addresses appear in the glue.
*/
if (!logged(namebuf, ERR_MISSING_GLUE)) {
isc_boolean_t missing_glue = ISC_FALSE;
for (cur = ai; cur != NULL; cur = cur->ai_next) {
switch (cur->ai_family) {
case AF_INET:
rdataset = a;
ptr = &((struct sockaddr_in *)(cur->ai_addr))->sin_addr;
type = "A";
break;
case AF_INET6:
rdataset = aaaa;
ptr = &((struct sockaddr_in6 *)(cur->ai_addr))->sin6_addr;
type = "AAAA";
break;
default:
continue;
}
match = ISC_FALSE;
if (dns_rdataset_isassociated(rdataset))
result = dns_rdataset_first(rdataset);
else
result = ISC_R_FAILURE;
while (result == ISC_R_SUCCESS && !match) {
dns_rdataset_current(rdataset, &rdata);
if (memcmp(ptr, rdata.data, rdata.length) == 0)
match = ISC_TRUE;
dns_rdata_reset(&rdata);
result = dns_rdataset_next(rdataset);
}
if (!match) {
dns_zone_log(zone, ISC_LOG_ERROR, "%s/NS '%s' "
"missing GLUE %s record (%s)",
ownerbuf, namebuf, type,
inet_ntop(cur->ai_family, ptr,
addrbuf, sizeof(addrbuf)));
/* XXX950 make fatal for 9.5.0. */
/* answer = ISC_FALSE; */
missing_glue = ISC_TRUE;
}
}
if (missing_glue)
add(namebuf, ERR_MISSING_GLUE);
}
freeaddrinfo(ai);
return (answer);
#else
return (ISC_TRUE);
#endif
}
static isc_boolean_t
checkmx(dns_zone_t *zone, dns_name_t *name, dns_name_t *owner) {
#ifdef USE_GETADDRINFO
struct addrinfo hints, *ai, *cur;
char namebuf[DNS_NAME_FORMATSIZE + 1];
char ownerbuf[DNS_NAME_FORMATSIZE];
int result;
int level = ISC_LOG_ERROR;
isc_boolean_t answer = ISC_TRUE;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
dns_name_format(name, namebuf, sizeof(namebuf) - 1);
/*
* Turn off search.
*/
if (dns_name_countlabels(name) > 1U)
strcat(namebuf, ".");
dns_name_format(owner, ownerbuf, sizeof(ownerbuf));
result = getaddrinfo(namebuf, NULL, &hints, &ai);
dns_name_format(name, namebuf, sizeof(namebuf) - 1);
switch (result) {
case 0:
/*
* Work around broken getaddrinfo() implementations that
* fail to set ai_canonname on first entry.
*/
cur = ai;
while (cur != NULL && cur->ai_canonname == NULL &&
cur->ai_next != NULL)
cur = cur->ai_next;
if (cur != NULL && cur->ai_canonname != NULL &&
strcasecmp(cur->ai_canonname, namebuf) != 0) {
if ((zone_options & DNS_ZONEOPT_WARNMXCNAME) != 0)
level = ISC_LOG_WARNING;
if ((zone_options & DNS_ZONEOPT_IGNOREMXCNAME) == 0) {
if (!logged(namebuf, ERR_IS_MXCNAME)) {
dns_zone_log(zone, level,
"%s/MX '%s' (out of zone)"
" is a CNAME '%s' "
"(illegal)",
ownerbuf, namebuf,
cur->ai_canonname);
add(namebuf, ERR_IS_MXCNAME);
}
if (level == ISC_LOG_ERROR)
answer = ISC_FALSE;
}
}
freeaddrinfo(ai);
return (answer);
case EAI_NONAME:
#if defined(EAI_NODATA) && (EAI_NODATA != EAI_NONAME)
case EAI_NODATA:
#endif
if (!logged(namebuf, ERR_NO_ADDRESSES)) {
dns_zone_log(zone, ISC_LOG_ERROR,
"%s/MX '%s' (out of zone) "
"has no addresses records (A or AAAA)",
ownerbuf, namebuf);
add(namebuf, ERR_NO_ADDRESSES);
}
/* XXX950 make fatal for 9.5.0. */
return (ISC_TRUE);
default:
if (!logged(namebuf, ERR_LOOKUP_FAILURE)) {
dns_zone_log(zone, ISC_LOG_WARNING,
"getaddrinfo(%s) failed: %s",
namebuf, gai_strerror(result));
add(namebuf, ERR_LOOKUP_FAILURE);
}
return (ISC_TRUE);
}
#else
return (ISC_TRUE);
#endif
}
static isc_boolean_t
checksrv(dns_zone_t *zone, dns_name_t *name, dns_name_t *owner) {
#ifdef USE_GETADDRINFO
struct addrinfo hints, *ai, *cur;
char namebuf[DNS_NAME_FORMATSIZE + 1];
char ownerbuf[DNS_NAME_FORMATSIZE];
int result;
int level = ISC_LOG_ERROR;
isc_boolean_t answer = ISC_TRUE;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
dns_name_format(name, namebuf, sizeof(namebuf) - 1);
/*
* Turn off search.
*/
if (dns_name_countlabels(name) > 1U)
strcat(namebuf, ".");
dns_name_format(owner, ownerbuf, sizeof(ownerbuf));
result = getaddrinfo(namebuf, NULL, &hints, &ai);
dns_name_format(name, namebuf, sizeof(namebuf) - 1);
switch (result) {
case 0:
/*
* Work around broken getaddrinfo() implementations that
* fail to set ai_canonname on first entry.
*/
cur = ai;
while (cur != NULL && cur->ai_canonname == NULL &&
cur->ai_next != NULL)
cur = cur->ai_next;
if (cur != NULL && cur->ai_canonname != NULL &&
strcasecmp(cur->ai_canonname, namebuf) != 0) {
if ((zone_options & DNS_ZONEOPT_WARNSRVCNAME) != 0)
level = ISC_LOG_WARNING;
if ((zone_options & DNS_ZONEOPT_IGNORESRVCNAME) == 0) {
if (!logged(namebuf, ERR_IS_SRVCNAME)) {
dns_zone_log(zone, level, "%s/SRV '%s'"
" (out of zone) is a "
"CNAME '%s' (illegal)",
ownerbuf, namebuf,
cur->ai_canonname);
add(namebuf, ERR_IS_SRVCNAME);
}
if (level == ISC_LOG_ERROR)
answer = ISC_FALSE;
}
}
freeaddrinfo(ai);
return (answer);
case EAI_NONAME:
#if defined(EAI_NODATA) && (EAI_NODATA != EAI_NONAME)
case EAI_NODATA:
#endif
if (!logged(namebuf, ERR_NO_ADDRESSES)) {
dns_zone_log(zone, ISC_LOG_ERROR,
"%s/SRV '%s' (out of zone) "
"has no addresses records (A or AAAA)",
ownerbuf, namebuf);
add(namebuf, ERR_NO_ADDRESSES);
}
/* XXX950 make fatal for 9.5.0. */
return (ISC_TRUE);
default:
if (!logged(namebuf, ERR_LOOKUP_FAILURE)) {
dns_zone_log(zone, ISC_LOG_WARNING,
"getaddrinfo(%s) failed: %s",
namebuf, gai_strerror(result));
add(namebuf, ERR_LOOKUP_FAILURE);
}
return (ISC_TRUE);
}
#else
return (ISC_TRUE);
#endif
}
isc_result_t
setup_logging(isc_mem_t *mctx, FILE *errout, isc_log_t **logp) {
isc_logdestination_t destination;
isc_logconfig_t *logconfig = NULL;
isc_log_t *log = NULL;
RUNTIME_CHECK(isc_log_create(mctx, &log, &logconfig) == ISC_R_SUCCESS);
isc_log_registercategories(log, categories);
isc_log_setcontext(log);
dns_log_init(log);
dns_log_setcontext(log);
cfg_log_init(log);
destination.file.stream = errout;
destination.file.name = NULL;
destination.file.versions = ISC_LOG_ROLLNEVER;
destination.file.maximum_size = 0;
RUNTIME_CHECK(isc_log_createchannel(logconfig, "stderr",
ISC_LOG_TOFILEDESC,
ISC_LOG_DYNAMIC,
&destination, 0) == ISC_R_SUCCESS);
RUNTIME_CHECK(isc_log_usechannel(logconfig, "stderr",
NULL, NULL) == ISC_R_SUCCESS);
*logp = log;
return (ISC_R_SUCCESS);
}
/*% load the zone */
isc_result_t
load_zone(isc_mem_t *mctx, const char *zonename, const char *filename,
dns_masterformat_t fileformat, const char *classname,
dns_zone_t **zonep)
{
isc_result_t result;
dns_rdataclass_t rdclass;
isc_textregion_t region;
isc_buffer_t buffer;
dns_fixedname_t fixorigin;
dns_name_t *origin;
dns_zone_t *zone = NULL;
REQUIRE(zonep == NULL || *zonep == NULL);
if (debug)
fprintf(stderr, "loading \"%s\" from \"%s\" class \"%s\"\n",
zonename, filename, classname);
CHECK(dns_zone_create(&zone, mctx));
dns_zone_settype(zone, dns_zone_master);
isc_buffer_init(&buffer, zonename, strlen(zonename));
isc_buffer_add(&buffer, strlen(zonename));
dns_fixedname_init(&fixorigin);
origin = dns_fixedname_name(&fixorigin);
CHECK(dns_name_fromtext(origin, &buffer, dns_rootname, 0, NULL));
CHECK(dns_zone_setorigin(zone, origin));
CHECK(dns_zone_setdbtype(zone, 1, (const char * const *) dbtype));
CHECK(dns_zone_setfile2(zone, filename, fileformat));
DE_CONST(classname, region.base);
region.length = strlen(classname);
CHECK(dns_rdataclass_fromtext(&rdclass, &region));
dns_zone_setclass(zone, rdclass);
dns_zone_setoption(zone, zone_options, ISC_TRUE);
dns_zone_setoption(zone, DNS_ZONEOPT_NOMERGE, nomerge);
if (docheckmx)
dns_zone_setcheckmx(zone, checkmx);
if (docheckns)
dns_zone_setcheckns(zone, checkns);
if (dochecksrv)
dns_zone_setchecksrv(zone, checksrv);
CHECK(dns_zone_load(zone));
if (zonep != NULL) {
*zonep = zone;
zone = NULL;
}
cleanup:
if (zone != NULL)
dns_zone_detach(&zone);
return (result);
}
/*% dump the zone */
isc_result_t
dump_zone(const char *zonename, dns_zone_t *zone, const char *filename,
dns_masterformat_t fileformat, const dns_master_style_t *style)
{
isc_result_t result;
FILE *output = stdout;
if (debug) {
if (filename != NULL && strcmp(filename, "-") != 0)
fprintf(stderr, "dumping \"%s\" to \"%s\"\n",
zonename, filename);
else
fprintf(stderr, "dumping \"%s\"\n", zonename);
}
if (filename != NULL && strcmp(filename, "-") != 0) {
result = isc_stdio_open(filename, "w+", &output);
if (result != ISC_R_SUCCESS) {
fprintf(stderr, "could not open output "
"file \"%s\" for writing\n", filename);
return (ISC_R_FAILURE);
}
}
result = dns_zone_dumptostream2(zone, output, fileformat, style);
if (output != stdout)
(void)isc_stdio_close(output);
return (result);
}