68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
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/* udns_misc.c
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miscellaneous routines
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Copyright (C) 2005 Michael Tokarev <mjt@corpit.ru>
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This file is part of UDNS library, an async DNS stub resolver.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library, in file named COPYING.LGPL; if not,
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write to the Free Software Foundation, Inc., 59 Temple Place,
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Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "udns.h"
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int dns_findname(const struct dns_nameval *nv, const char *name) {
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register const char *a, *b;
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for(; nv->name; ++nv)
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for(a = name, b = nv->name; ; ++a, ++b)
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if (DNS_DNUC(*a) != *b) break;
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else if (!*a) return nv->val;
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return -1;
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}
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const char *_dns_format_code(char *buf, const char *prefix, int code) {
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char *bp = buf;
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unsigned c, n;
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do *bp++ = DNS_DNUC(*prefix);
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while(*++prefix);
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*bp++ = '#';
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if (code < 0) code = -code, *bp++ = '-';
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n = 0; c = code;
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do ++n;
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while((c /= 10));
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c = code;
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bp[n--] = '\0';
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do bp[n--] = c % 10 + '0';
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while((c /= 10));
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return buf;
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}
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const char *dns_strerror(int err) {
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if (err >= 0) return "successeful completion";
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switch(err) {
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case DNS_E_TEMPFAIL: return "temporary failure in name resolution";
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case DNS_E_PROTOCOL: return "protocol error";
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case DNS_E_NXDOMAIN: return "domain name does not exist";
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case DNS_E_NODATA: return "valid domain but no data of requested type";
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case DNS_E_NOMEM: return "out of memory";
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case DNS_E_BADQUERY: return "malformed query";
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default: return "unknown error";
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}
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}
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const char *dns_version(void) {
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return UDNS_VERSION;
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}
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