freeswitch/libs/udns/udns_misc.c

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/* $Id: udns_misc.c,v 1.8 2005/04/05 22:51:32 mjt Exp $
miscellaneous routines
Copyright (C) 2005 Michael Tokarev <mjt@corpit.ru>
This file is part of UDNS library, an async DNS stub resolver.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library, in file named COPYING.LGPL; if not,
write to the Free Software Foundation, Inc., 59 Temple Place,
Suite 330, Boston, MA 02111-1307 USA
*/
#include "udns.h"
int dns_findname(const struct dns_nameval *nv, const char *name) {
register const char *a, *b;
for(; nv->name; ++nv)
for(a = name, b = nv->name; ; ++a, ++b)
if (DNS_DNUC(*a) != *b) break;
else if (!*a) return nv->val;
return -1;
}
const char *_dns_format_code(char *buf, const char *prefix, int code) {
char *bp = buf;
unsigned c, n;
do *bp++ = DNS_DNUC(*prefix);
while(*++prefix);
*bp++ = '#';
if (code < 0) code = -code, *bp++ = '-';
n = 0; c = code;
do ++n;
while((c /= 10));
c = code;
bp[n--] = '\0';
do bp[n--] = c % 10 + '0';
while((c /= 10));
return buf;
}
const char *dns_strerror(int err) {
if (err >= 0) return "successeful completion";
switch(err) {
case DNS_E_TEMPFAIL: return "temporary failure in name resolution";
case DNS_E_PROTOCOL: return "protocol error";
case DNS_E_NXDOMAIN: return "domain name does not exist";
case DNS_E_NODATA: return "valid domain but no data of requested type";
case DNS_E_NOMEM: return "out of memory";
case DNS_E_BADQUERY: return "malformed query";
default: return "unknown error";
}
}
const char *dns_version(void) {
return UDNS_VERSION;
}