diff options
Diffstat (limited to 'src/libknot/error.c')
| -rw-r--r-- | src/libknot/error.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/src/libknot/error.c b/src/libknot/error.c new file mode 100644 index 0000000..352acd3 --- /dev/null +++ b/src/libknot/error.c @@ -0,0 +1,239 @@ +/* Copyright (C) 2022 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_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_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" }, + + /* 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)); + } +} |