3 * - diagnostic functions
7 * This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 #include <arpa/inet.h>
31 /* Core diagnostic functions */
33 void adns__vdiag(adns_state ads
, const char *pfx
, adns_initflags prevent
,
34 int serv
, adns_query qu
, const char *fmt
, va_list al
) {
35 const char *bef
, *aft
;
37 if (!(ads
->iflags
& adns_if_debug
) && (!prevent
|| (ads
->iflags
& prevent
))) return;
39 fprintf(stderr
,"adns%s: ",pfx
);
41 vfprintf(stderr
,fmt
,al
);
46 if (qu
&& qu
->query_dgram
) {
48 fprintf(stderr
,"%sQNAME=%s, QTYPE=%s",
50 adns__diag_domain(qu
->ads
,-1,0, &vb
,
51 qu
->query_dgram
,qu
->query_dglen
,DNS_HDRSIZE
),
52 qu
->typei ? qu
->typei
->rrtname
: "<unknown>");
53 if (qu
->typei
&& qu
->typei
->fmtname
)
54 fprintf(stderr
,"(%s)",qu
->typei
->fmtname
);
59 fprintf(stderr
,"%sNS=%s",bef
,inet_ntoa(ads
->servers
[serv
].addr
));
66 void adns__debug(adns_state ads
, int serv
, adns_query qu
, const char *fmt
, ...) {
70 adns__vdiag(ads
," debug",0,serv
,qu
,fmt
,al
);
74 void adns__warn(adns_state ads
, int serv
, adns_query qu
, const char *fmt
, ...) {
78 adns__vdiag(ads
," warning",adns_if_noerrprint
|adns_if_noserverwarn
,serv
,qu
,fmt
,al
);
82 void adns__diag(adns_state ads
, int serv
, adns_query qu
, const char *fmt
, ...) {
86 adns__vdiag(ads
,"",adns_if_noerrprint
,serv
,qu
,fmt
,al
);
92 void adns__vbuf_init(vbuf
*vb
) {
93 vb
->used
= vb
->avail
= 0; vb
->buf
= 0;
96 int adns__vbuf_ensure(vbuf
*vb
, int want
) {
99 if (vb
->avail
>= want
) return 1;
100 nb
= realloc(vb
->buf
,want
); if (!nb
) return 0;
106 void adns__vbuf_appendq(vbuf
*vb
, const byte
*data
, int len
) {
107 memcpy(vb
->buf
+vb
->used
,data
,len
);
111 int adns__vbuf_append(vbuf
*vb
, const byte
*data
, int len
) {
115 newlen
= vb
->used
+len
;
116 if (vb
->avail
< newlen
) {
117 if (newlen
<20) newlen
= 20;
119 nb
= realloc(vb
->buf
,newlen
);
120 if (!nb
) { newlen
= vb
->used
+len
; nb
= realloc(vb
->buf
,newlen
); }
125 adns__vbuf_appendq(vb
,data
,len
);
129 int adns__vbuf_appendstr(vbuf
*vb
, const char *data
) {
132 return adns__vbuf_append(vb
,data
,l
);
135 void adns__vbuf_free(vbuf
*vb
) {
140 /* Additional diagnostic functions */
142 const char *adns__diag_domain(adns_state ads
, int serv
, adns_query qu
,
143 vbuf
*vb
, const byte
*dgram
, int dglen
, int cbyte
) {
146 st
= adns__parse_domain(ads
,serv
,qu
,vb
, pdf_quoteok
, dgram
,dglen
,&cbyte
,dglen
);
147 if (st
== adns_s_nolocalmem
) {
148 return "<cannot report domain... out of memory>";
152 if (!(adns__vbuf_appendstr(vb
,"<bad format... ") &&
153 adns__vbuf_appendstr(vb
,adns_strerror(st
)) &&
154 adns__vbuf_appendstr(vb
,">") &&
155 adns__vbuf_append(vb
,"",1))) {
156 return "<cannot report bad format... out of memory>";
160 adns__vbuf_appendstr(vb
,"<truncated ...>");
161 adns__vbuf_append(vb
,"",1);
166 adns_status
adns_rr_info(adns_rrtype type
,
167 const char **rrtname_r
, const char **fmtname_r
,
169 const void *datap
, char **data_r
) {
170 const typeinfo
*typei
;
174 typei
= adns__findtype(type
);
175 if (!typei
) return adns_s_notimplemented
;
177 if (rrtname_r
) *rrtname_r
= typei
->rrtname
;
178 if (fmtname_r
) *fmtname_r
= typei
->fmtname
;
179 if (len_r
) *len_r
= typei
->rrsz
;
181 if (!datap
) return adns_s_ok
;
183 adns__vbuf_init(&vb
);
184 st
= typei
->convstring(&vb
,datap
);
185 if (st
) goto x_freevb
;
186 if (!adns__vbuf_append(&vb
,"",1)) { st
= adns_s_nolocalmem
; goto x_freevb
; }
187 assert(strlen(vb
.buf
) == vb
.used
-1);
188 *data_r
= realloc(vb
.buf
,vb
.used
);
189 if (!*data_r
) *data_r
= vb
.buf
;
193 adns__vbuf_free(&vb
);
197 #define SINFO(n,s) { adns_s_##n, s }
199 static const struct sinfo
{
204 SINFO( timeout
, "Timed out" ),
205 SINFO( nolocalmem
, "Out of memory" ),
206 SINFO( allservfail
, "No working nameservers" ),
207 SINFO( servfail
, "Nameserver failure" ),
208 SINFO( notimplemented
, "Query not implemented" ),
209 SINFO( refused
, "Refused by nameserver" ),
210 SINFO( reasonunknown
, "Reason unknown" ),
211 SINFO( norecurse
, "Recursion denied by nameserver" ),
212 SINFO( serverfaulty
, "Nameserver sent bad data" ),
213 SINFO( unknownreply
, "Reply from nameserver not understood" ),
214 SINFO( invaliddata
, "Invalid data" ),
215 SINFO( inconsistent
, "Inconsistent data" ),
216 SINFO( cname
, "RR refers to an alias" ),
217 SINFO( invalidanswerdomain
, "Received syntactically invalid domain" ),
218 SINFO( nxdomain
, "No such domain" ),
219 SINFO( nodata
, "No such data" ),
220 SINFO( invalidquerydomain
, "Domain syntactically invalid" ),
221 SINFO( domaintoolong
, "Domain name too long" )
224 static int si_compar(const void *key
, const void *elem
) {
225 const adns_status
*st
= key
;
226 const struct sinfo
*si
= elem
;
228 return *st
< si
->st ?
-1 : *st
> si
->st ?
1 : 0;
231 const char *adns_strerror(adns_status st
) {
232 static char buf
[100];
234 const struct sinfo
*si
;
236 si
= bsearch(&st
,sinfos
,sizeof(sinfos
)/sizeof(*si
),sizeof(*si
),si_compar
);
237 if (si
) return si
->string
;
239 snprintf(buf
,sizeof(buf
),"code %d",st
);
243 void adns__isort(void *array
, int nobjs
, int sz
, void *tempbuf
,
244 int (*needswap
)(const void *a
, const void *b
)) {
248 for (i
=0; i
<nobjs
; i
++) {
249 for (place
= i
; place
>0 && needswap(data
+ (place
-1)*sz
, data
+ i
*sz
); place
--);
252 memcpy(tempbuf
, data
+ i
*sz
, sz
);
253 memmove(data
+ (place
+1)*sz
, data
+ place
*sz
, (i
-place
)*sz
);
254 memcpy(data
+ place
*sz
, tempbuf
, sz
);