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/* Copyright (C) 2024 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <lmdb.h>
#include "libknot/attribute.h"
#include "libknot/error.h"
#include "libdnssec/error.h"
struct error {
int code;
const char *message;
};
static const struct error errors[] = {
{ KNOT_EOK, "OK" },
/* Directly mapped error codes. */
{ KNOT_ENOMEM, "not enough memory" },
{ KNOT_EINVAL, "invalid parameter" },
{ KNOT_ENOTSUP, "operation not supported" },
{ KNOT_EBUSY, "requested resource is busy" },
{ KNOT_EAGAIN, "OS lacked necessary resources" },
{ KNOT_ENOBUFS, "no buffers" },
{ KNOT_EMFILE, "too many open files" },
{ KNOT_ENFILE, "too many open files in system" },
{ KNOT_EACCES, "operation not permitted" },
{ KNOT_EISCONN, "already connected" },
{ KNOT_ECONNREFUSED, "connection refused" },
{ KNOT_EALREADY, "operation already in progress" },
{ KNOT_ECONNRESET, "connection reset by peer" },
{ KNOT_ECONNABORTED, "connection aborted" },
{ KNOT_ENETRESET, "connection aborted by network" },
{ KNOT_EHOSTUNREACH, "host is unreachable" },
{ KNOT_ENETUNREACH, "network is unreachable" },
{ KNOT_EHOSTDOWN, "host is down" },
{ KNOT_ENETDOWN, "network is down" },
{ KNOT_EADDRINUSE, "address already in use" },
{ KNOT_ENOENT, "not exists" },
{ KNOT_EEXIST, "already exists" },
{ KNOT_ERANGE, "value is out of range" },
{ KNOT_EADDRNOTAVAIL, "address is not available" },
{ KNOT_ENOTDIR, "not a directory" },
{ KNOT_EPERM, "operation not permitted" },
{ KNOT_EROFS, "read-only file system" },
{ KNOT_ERRNO_ERROR, "unknown system error" },
/* General errors. */
{ KNOT_ERROR, "failed" },
{ KNOT_EPARSEFAIL, "parser failed" },
{ KNOT_ESEMCHECK, "semantic check" },
{ KNOT_EUPTODATE, "zone is up-to-date" },
{ KNOT_EFEWDATA, "not enough data to parse" },
{ KNOT_ESPACE, "not enough space provided" },
{ KNOT_EMALF, "malformed data" },
{ KNOT_ENSEC3PAR, "missing or wrong NSEC3PARAM record" },
{ KNOT_ENSEC3CHAIN, "missing or wrong NSEC3 chain in the zone" },
{ KNOT_EOUTOFZONE, "name does not belong to the zone" },
{ KNOT_EZONEINVAL, "invalid zone file" },
{ KNOT_ENOZONE, "no such zone found" },
{ KNOT_ENONODE, "no such node in zone found" },
{ KNOT_ENORECORD, "no such record in zone found" },
{ KNOT_EISRECORD, "such record already exists in zone" },
{ KNOT_ENOMASTER, "no usable master" },
{ KNOT_EPREREQ, "UPDATE prerequisite not met" },
{ KNOT_ETTL, "TTL mismatch" },
{ KNOT_ENOTTL, "no TTL specified" },
{ KNOT_ENOXFR, "transfer was not sent" },
{ KNOT_EDENIED, "not allowed" },
{ KNOT_ECONN, "connection reset" },
{ KNOT_ETIMEOUT, "connection timeout" },
{ KNOT_ENODIFF, "cannot create zone diff" },
{ KNOT_ENOTSIG, "expected a TSIG or SIG(0)" },
{ KNOT_ELIMIT, "exceeded limit" },
{ KNOT_EZONESIZE, "zone size exceeded" },
{ KNOT_EOF, "end of file" },
{ KNOT_ESYSTEM, "system error" },
{ KNOT_EFILE, "file error" },
{ KNOT_ESOAINVAL, "SOA mismatch" },
{ KNOT_ETRAIL, "trailing data" },
{ KNOT_EPROCESSING, "processing error" },
{ KNOT_EPROGRESS, "in progress" },
{ KNOT_ELOOP, "loop detected" },
{ KNOT_EPROGRAM, "program not loaded" },
{ KNOT_EFD, "file descriptor error" },
{ KNOT_ENOPARAM, "missing parameter" },
{ KNOT_EXPARAM, "parameter conflict" },
{ KNOT_EEMPTYZONE, "zone is empty" },
{ KNOT_ENODB, "database does not exist" },
{ KNOT_EUNREACH, "remote known to be unreachable" },
{ KNOT_EBADCERTKEY, "unknown certificate key" },
{ KNOT_EFACCES, "file permission denied" },
{ KNOT_EBACKUPDATA, "requested data not in backup" },
{ KNOT_GENERAL_ERROR, "unknown general error" },
/* Control states. */
{ KNOT_CTL_ESTOP, "stopping server" },
{ KNOT_CTL_EZONE, "operation failed for some zones" },
/* Network errors. */
{ KNOT_NET_EADDR, "bad address or host name" },
{ KNOT_NET_ESOCKET, "can't create socket" },
{ KNOT_NET_ECONNECT, "can't connect" },
{ KNOT_NET_ESEND, "can't send data" },
{ KNOT_NET_ERECV, "can't receive data" },
{ KNOT_NET_ETIMEOUT, "network timeout" },
/* Encoding errors. */
{ KNOT_BASE64_ESIZE, "invalid base64 string length" },
{ KNOT_BASE64_ECHAR, "invalid base64 character" },
{ KNOT_BASE32HEX_ESIZE, "invalid base32hex string length" },
{ KNOT_BASE32HEX_ECHAR, "invalid base32hex character" },
/* TSIG errors. */
{ KNOT_TSIG_EBADSIG, "failed to verify TSIG" },
{ KNOT_TSIG_EBADKEY, "TSIG key not recognized or invalid" },
{ KNOT_TSIG_EBADTIME, "TSIG out of time window" },
{ KNOT_TSIG_EBADTRUNC, "TSIG bad truncation" },
/* DNSSEC errors. */
{ KNOT_DNSSEC_ENOKEY, "no keys for signing" },
{ KNOT_DNSSEC_EMISSINGKEYTYPE, "missing active KSK or ZSK" },
{ KNOT_DNSSEC_ENOSIG, "no valid signature for a record" },
{ KNOT_DNSSEC_ENONSEC, "missing NSEC(3) record" },
{ KNOT_DNSSEC_ENSEC_BITMAP, "wrong NSEC(3) bitmap" },
{ KNOT_DNSSEC_ENSEC_CHAIN, "inconsistent NSEC(3) chain" },
{ KNOT_DNSSEC_ENSEC3_OPTOUT, "wrong NSEC3 opt-out" },
/* Yparser errors. */
{ KNOT_YP_ECHAR_TAB, "tabulator character is not allowed" },
{ KNOT_YP_EINVAL_ITEM, "invalid item" },
{ KNOT_YP_EINVAL_ID, "invalid identifier" },
{ KNOT_YP_EINVAL_DATA, "invalid value" },
{ KNOT_YP_EINVAL_INDENT, "invalid indentation" },
{ KNOT_YP_ENOTSUP_DATA, "value not supported" },
{ KNOT_YP_ENOTSUP_ID, "identifier not supported" },
{ KNOT_YP_ENODATA, "missing value" },
{ KNOT_YP_ENOID, "missing identifier" },
/* Configuration errors. */
{ KNOT_CONF_ENOTINIT, "config DB not initialized" },
{ KNOT_CONF_EVERSION, "invalid config DB version" },
{ KNOT_CONF_EREDEFINE, "duplicate identifier" },
/* Transaction errors. */
{ KNOT_TXN_EEXISTS, "too many transactions" },
{ KNOT_TXN_ENOTEXISTS, "no active transaction" },
/* DNSSEC errors. */
{ KNOT_INVALID_PUBLIC_KEY, "invalid public key" },
{ KNOT_INVALID_PRIVATE_KEY, "invalid private key" },
{ KNOT_INVALID_KEY_ALGORITHM, "invalid key algorithm" },
{ KNOT_INVALID_KEY_SIZE, "invalid key size" },
{ KNOT_INVALID_KEY_ID, "invalid key ID" },
{ KNOT_INVALID_KEY_NAME, "invalid key name" },
{ KNOT_NO_PUBLIC_KEY, "no public key" },
{ KNOT_NO_PRIVATE_KEY, "no private key" },
{ KNOT_NO_READY_KEY, "no key ready for submission" },
{ KNOT_DNSSEC_EKEYTAG_LIMIT, "many keys with equal keytag" },
{ KNOT_DNSSEC_EXTRA_NSEC, "superfluous NSEC(3)" },
/* Terminator */
{ KNOT_ERROR, NULL }
};
/*!
* \brief Lookup error message by error code.
*/
static const char *lookup_message(int code)
{
for (const struct error *e = errors; e->message; e++) {
if (e->code == code) {
return e->message;
}
}
return NULL;
}
_public_
int knot_error_from_libdnssec(int libdnssec_errcode)
{
switch (libdnssec_errcode) {
case DNSSEC_ERROR:
return KNOT_ERROR;
case DNSSEC_MALFORMED_DATA:
return KNOT_EMALF;
case DNSSEC_NOT_FOUND:
return KNOT_ENOENT;
case DNSSEC_NO_PUBLIC_KEY:
case DNSSEC_NO_PRIVATE_KEY:
return KNOT_DNSSEC_ENOKEY;
// EOK, EINVAL, ENOMEM and ENOENT are identical, no need to translate
case DNSSEC_INVALID_PUBLIC_KEY ... DNSSEC_INVALID_KEY_NAME:
return libdnssec_errcode
- DNSSEC_INVALID_PUBLIC_KEY + KNOT_INVALID_PUBLIC_KEY;
default:
return libdnssec_errcode;
}
}
_public_
const char *knot_strerror(int code)
{
const char *msg;
switch (code) {
case INT_MIN: // Cannot convert to a positive value.
code = KNOT_ERROR;
// FALLTHROUGH
case KNOT_ERROR_MIN ... KNOT_EOK:
msg = lookup_message(code); break;
case DNSSEC_ERROR_MIN ... DNSSEC_ERROR_MAX:
msg = dnssec_strerror(code); break;
case MDB_KEYEXIST ... MDB_LAST_ERRCODE:
msg = mdb_strerror(code); break;
default:
msg = NULL;
}
if (msg != NULL) {
return msg;
} else {
// strerror_r would be better but it requires thread local storage.
return strerror(abs(code));
}
}
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