e576be50 |
1 | /* |
2 | * general.c |
3 | * - diagnostic functions |
4 | * - vbuf handling |
5 | */ |
6 | /* |
7 | * This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson |
8 | * |
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) |
12 | * any later version. |
13 | * |
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. |
18 | * |
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. |
22 | */ |
23 | |
3955725c |
24 | #include <stdlib.h> |
88372443 |
25 | #include <string.h> |
3955725c |
26 | |
27 | #include <arpa/inet.h> |
28 | |
e576be50 |
29 | #include "internal.h" |
30 | |
31 | /* Core diagnostic functions */ |
32 | |
33 | void adns__vdiag(adns_state ads, const char *pfx, adns_initflags prevent, |
3955725c |
34 | int serv, adns_query qu, const char *fmt, va_list al) { |
e576be50 |
35 | const char *bef, *aft; |
36 | vbuf vb; |
37 | if (!(ads->iflags & adns_if_debug) && (!prevent || (ads->iflags & prevent))) return; |
38 | |
39 | fprintf(stderr,"adns%s: ",pfx); |
40 | |
41 | vfprintf(stderr,fmt,al); |
42 | |
43 | bef= " ("; |
44 | aft= "\n"; |
45 | |
46 | if (qu && qu->query_dgram) { |
47 | adns__vbuf_init(&vb); |
48 | fprintf(stderr,"%sQNAME=%s, QTYPE=%s", |
49 | bef, |
828d89bd |
50 | adns__diag_domain(qu->ads,-1,0, &vb, |
3955725c |
51 | qu->query_dgram,qu->query_dglen,DNS_HDRSIZE), |
86e7b8d9 |
52 | qu->typei ? qu->typei->rrtname : "<unknown>"); |
53 | if (qu->typei && qu->typei->fmtname) |
54 | fprintf(stderr,"(%s)",qu->typei->fmtname); |
e576be50 |
55 | bef=", "; aft=")\n"; |
56 | } |
57 | |
58 | if (serv>=0) { |
59 | fprintf(stderr,"%sNS=%s",bef,inet_ntoa(ads->servers[serv].addr)); |
60 | bef=", "; aft=")\n"; |
61 | } |
62 | |
63 | fputs(aft,stderr); |
64 | } |
65 | |
66 | void adns__debug(adns_state ads, int serv, adns_query qu, const char *fmt, ...) { |
67 | va_list al; |
68 | |
69 | va_start(al,fmt); |
70 | adns__vdiag(ads," debug",0,serv,qu,fmt,al); |
71 | va_end(al); |
72 | } |
73 | |
74 | void adns__warn(adns_state ads, int serv, adns_query qu, const char *fmt, ...) { |
75 | va_list al; |
76 | |
77 | va_start(al,fmt); |
78 | adns__vdiag(ads," warning",adns_if_noerrprint|adns_if_noserverwarn,serv,qu,fmt,al); |
79 | va_end(al); |
80 | } |
81 | |
82 | void adns__diag(adns_state ads, int serv, adns_query qu, const char *fmt, ...) { |
83 | va_list al; |
84 | |
85 | va_start(al,fmt); |
86 | adns__vdiag(ads,"",adns_if_noerrprint,serv,qu,fmt,al); |
87 | va_end(al); |
88 | } |
89 | |
90 | /* vbuf functions */ |
91 | |
92 | void adns__vbuf_init(vbuf *vb) { |
93 | vb->used= vb->avail= 0; vb->buf= 0; |
94 | } |
95 | |
96 | int adns__vbuf_ensure(vbuf *vb, int want) { |
97 | void *nb; |
98 | |
99 | if (vb->avail >= want) return 1; |
100 | nb= realloc(vb->buf,want); if (!nb) return 0; |
101 | vb->buf= nb; |
102 | vb->avail= want; |
103 | return 1; |
104 | } |
105 | |
106 | void adns__vbuf_appendq(vbuf *vb, const byte *data, int len) { |
107 | memcpy(vb->buf+vb->used,data,len); |
108 | vb->used+= len; |
109 | } |
110 | |
111 | int adns__vbuf_append(vbuf *vb, const byte *data, int len) { |
112 | int newlen; |
113 | void *nb; |
114 | |
115 | newlen= vb->used+len; |
116 | if (vb->avail < newlen) { |
a49a6d7b |
117 | if (newlen<20) newlen= 20; |
e576be50 |
118 | newlen <<= 1; |
119 | nb= realloc(vb->buf,newlen); |
a49a6d7b |
120 | if (!nb) { newlen= vb->used+len; nb= realloc(vb->buf,newlen); } |
e576be50 |
121 | if (!nb) return 0; |
122 | vb->buf= nb; |
123 | vb->avail= newlen; |
124 | } |
125 | adns__vbuf_appendq(vb,data,len); |
126 | return 1; |
127 | } |
128 | |
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129 | int adns__vbuf_appendstr(vbuf *vb, const char *data) { |
130 | int l; |
9557e604 |
131 | l= strlen(data); |
f759e52e |
132 | return adns__vbuf_append(vb,data,l); |
133 | } |
134 | |
a49a6d7b |
135 | void adns__vbuf_free(vbuf *vb) { |
136 | free(vb->buf); |
137 | adns__vbuf_init(vb); |
138 | } |
139 | |
e576be50 |
140 | /* Additional diagnostic functions */ |
141 | |
828d89bd |
142 | const char *adns__diag_domain(adns_state ads, int serv, adns_query qu, |
143 | vbuf *vb, const byte *dgram, int dglen, int cbyte) { |
e576be50 |
144 | adns_status st; |
145 | |
828d89bd |
146 | st= adns__parse_domain(ads,serv,qu,vb, pdf_quoteok, dgram,dglen,&cbyte,dglen); |
3955725c |
147 | if (st == adns_s_nolocalmem) { |
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148 | return "<cannot report domain... out of memory>"; |
149 | } |
150 | if (st) { |
151 | vb->used= 0; |
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>"; |
157 | } |
158 | } |
3955725c |
159 | if (!vb->used) { |
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160 | adns__vbuf_appendstr(vb,"<truncated ...>"); |
161 | adns__vbuf_append(vb,"",1); |
162 | } |
163 | return vb->buf; |
164 | } |
86e7b8d9 |
165 | |
166 | adns_status adns_rr_info(adns_rrtype type, |
167 | const char **rrtname_r, const char **fmtname_r, |
168 | int *len_r, |
169 | const void *datap, char **data_r) { |
170 | const typeinfo *typei; |
171 | vbuf vb; |
172 | adns_status st; |
173 | |
174 | typei= adns__findtype(type); |
175 | if (!typei) return adns_s_notimplemented; |
176 | |
177 | if (rrtname_r) *rrtname_r= typei->rrtname; |
178 | if (fmtname_r) *fmtname_r= typei->fmtname; |
179 | if (len_r) *len_r= typei->rrsz; |
180 | |
181 | if (!datap) return adns_s_ok; |
182 | |
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; |
190 | return adns_s_ok; |
191 | |
192 | x_freevb: |
193 | adns__vbuf_free(&vb); |
194 | return st; |
195 | } |
196 | |
197 | #define SINFO(n,s) { adns_s_##n, s } |
198 | |
199 | static const struct sinfo { |
200 | adns_status st; |
201 | const char *string; |
202 | } sinfos[]= { |
ffbda80c |
203 | SINFO( ok, "OK" ), |
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" ), |
a6536d8b |
220 | SINFO( invalidquerydomain, "Query domain invalid" ), |
ffbda80c |
221 | SINFO( domaintoolong, "Domain name too long" ) |
86e7b8d9 |
222 | }; |
223 | |
224 | static int si_compar(const void *key, const void *elem) { |
225 | const adns_status *st= key; |
226 | const struct sinfo *si= elem; |
227 | |
228 | return *st < si->st ? -1 : *st > si->st ? 1 : 0; |
229 | } |
230 | |
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231 | const char *adns_strerror(adns_status st) { |
232 | static char buf[100]; |
86e7b8d9 |
233 | |
234 | const struct sinfo *si; |
235 | |
236 | si= bsearch(&st,sinfos,sizeof(sinfos)/sizeof(*si),sizeof(*si),si_compar); |
237 | if (si) return si->string; |
238 | |
e576be50 |
239 | snprintf(buf,sizeof(buf),"code %d",st); |
240 | return buf; |
241 | } |
88372443 |
242 | |
243 | void adns__isort(void *array, int nobjs, int sz, void *tempbuf, |
244 | int (*needswap)(const void *a, const void *b)) { |
245 | byte *data= array; |
246 | int i, place; |
247 | |
248 | for (i=0; i<nobjs; i++) { |
249 | for (place= i; place>0 && needswap(data + (place-1)*sz, data + i*sz); place--); |
250 | |
251 | if (place != i) { |
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); |
255 | } |
256 | } |
257 | } |