e576be50 |
1 | /* |
2 | * setup.c |
3 | * - configuration file parsing |
4 | * - management of global state |
5 | */ |
6 | /* |
d942707d |
7 | * This file is |
8 | * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk> |
9 | * |
10 | * It is part of adns, which is |
3d5cde09 |
11 | * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk> |
bef232ae |
12 | * Copyright (C) 1999-2000 Tony Finch <dot@dotat.at> |
e576be50 |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU General Public License as published by |
16 | * the Free Software Foundation; either version 2, or (at your option) |
17 | * any later version. |
18 | * |
19 | * This program is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU General Public License |
25 | * along with this program; if not, write to the Free Software Foundation, |
26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
27 | */ |
656b2da9 |
28 | |
4353a5c4 |
29 | #include <stdlib.h> |
30 | #include <errno.h> |
78bcc172 |
31 | #include <limits.h> |
4353a5c4 |
32 | #include <unistd.h> |
33 | #include <fcntl.h> |
656b2da9 |
34 | |
5aabad0d |
35 | #include <sys/types.h> |
4353a5c4 |
36 | #include <netdb.h> |
71a6ff46 |
37 | #include <sys/socket.h> |
38 | #include <netinet/in.h> |
4353a5c4 |
39 | #include <arpa/inet.h> |
40 | |
41 | #include "internal.h" |
42 | |
fb7fbb66 |
43 | static void readconfig(adns_state ads, const char *filename, int warnmissing); |
36369543 |
44 | |
656b2da9 |
45 | static void addserver(adns_state ads, struct in_addr addr) { |
46 | int i; |
47 | struct server *ss; |
48 | |
49 | for (i=0; i<ads->nservers; i++) { |
50 | if (ads->servers[i].addr.s_addr == addr.s_addr) { |
3955725c |
51 | adns__debug(ads,-1,0,"duplicate nameserver %s ignored",inet_ntoa(addr)); |
656b2da9 |
52 | return; |
53 | } |
54 | } |
55 | |
56 | if (ads->nservers>=MAXSERVERS) { |
3955725c |
57 | adns__diag(ads,-1,0,"too many nameservers, ignoring %s",inet_ntoa(addr)); |
656b2da9 |
58 | return; |
59 | } |
60 | |
61 | ss= ads->servers+ads->nservers; |
62 | ss->addr= addr; |
656b2da9 |
63 | ads->nservers++; |
64 | } |
65 | |
914a5ff5 |
66 | static void freesearchlist(adns_state ads) { |
67 | if (ads->nsearchlist) free(*ads->searchlist); |
68 | free(ads->searchlist); |
69 | } |
70 | |
36369543 |
71 | static void saveerr(adns_state ads, int en) { |
72 | if (!ads->configerrno) ads->configerrno= en; |
73 | } |
74 | |
656b2da9 |
75 | static void configparseerr(adns_state ads, const char *fn, int lno, |
76 | const char *fmt, ...) { |
77 | va_list al; |
36369543 |
78 | |
79 | saveerr(ads,EINVAL); |
80 | if (!ads->diagfile || (ads->iflags & adns_if_noerrprint)) return; |
81 | |
82 | if (lno==-1) fprintf(ads->diagfile,"adns: %s: ",fn); |
83 | else fprintf(ads->diagfile,"adns: %s:%d: ",fn,lno); |
656b2da9 |
84 | va_start(al,fmt); |
36369543 |
85 | vfprintf(ads->diagfile,fmt,al); |
656b2da9 |
86 | va_end(al); |
36369543 |
87 | fputc('\n',ads->diagfile); |
656b2da9 |
88 | } |
89 | |
32af6b2a |
90 | static int nextword(const char **bufp_io, const char **word_r, int *l_r) { |
91 | const char *p, *q; |
92 | |
93 | p= *bufp_io; |
94 | while (ctype_whitespace(*p)) p++; |
95 | if (!*p) return 0; |
96 | |
97 | q= p; |
98 | while (*q && !ctype_whitespace(*q)) q++; |
99 | |
100 | *l_r= q-p; |
101 | *word_r= p; |
102 | *bufp_io= q; |
103 | |
104 | return 1; |
105 | } |
106 | |
609133ee |
107 | static void ccf_nameserver(adns_state ads, const char *fn, |
108 | int lno, const char *buf) { |
656b2da9 |
109 | struct in_addr ia; |
110 | |
111 | if (!inet_aton(buf,&ia)) { |
112 | configparseerr(ads,fn,lno,"invalid nameserver address `%s'",buf); |
113 | return; |
114 | } |
3955725c |
115 | adns__debug(ads,-1,0,"using nameserver %s",inet_ntoa(ia)); |
656b2da9 |
116 | addserver(ads,ia); |
117 | } |
118 | |
609133ee |
119 | static void ccf_search(adns_state ads, const char *fn, |
120 | int lno, const char *buf) { |
32af6b2a |
121 | const char *bufp, *word; |
122 | char *newchars, **newptrs, **pp; |
123 | int count, tl, l; |
124 | |
656b2da9 |
125 | if (!buf) return; |
32af6b2a |
126 | |
127 | bufp= buf; |
128 | count= 0; |
129 | tl= 0; |
130 | while (nextword(&bufp,&word,&l)) { count++; tl += l+1; } |
131 | |
609133ee |
132 | newptrs= malloc(sizeof(char*)*count); |
133 | if (!newptrs) { saveerr(ads,errno); return; } |
134 | |
135 | newchars= malloc(tl); |
136 | if (!newchars) { saveerr(ads,errno); free(newptrs); return; } |
32af6b2a |
137 | |
138 | bufp= buf; |
139 | pp= newptrs; |
140 | while (nextword(&bufp,&word,&l)) { |
141 | *pp++= newchars; |
142 | memcpy(newchars,word,l); |
143 | newchars += l; |
144 | *newchars++ = 0; |
145 | } |
146 | |
914a5ff5 |
147 | freesearchlist(ads); |
32af6b2a |
148 | ads->nsearchlist= count; |
149 | ads->searchlist= newptrs; |
656b2da9 |
150 | } |
151 | |
609133ee |
152 | static void ccf_sortlist(adns_state ads, const char *fn, |
153 | int lno, const char *buf) { |
32af6b2a |
154 | const char *word; |
09957b1c |
155 | char tbuf[200], *slash, *ep; |
156 | struct in_addr base, mask; |
157 | int l; |
158 | unsigned long initial, baselocal; |
159 | |
32af6b2a |
160 | if (!buf) return; |
161 | |
09957b1c |
162 | ads->nsortlist= 0; |
32af6b2a |
163 | while (nextword(&buf,&word,&l)) { |
09957b1c |
164 | if (ads->nsortlist >= MAXSORTLIST) { |
609133ee |
165 | adns__diag(ads,-1,0,"too many sortlist entries," |
166 | " ignoring %.*s onwards",l,word); |
09957b1c |
167 | return; |
168 | } |
169 | |
170 | if (l >= sizeof(tbuf)) { |
32af6b2a |
171 | configparseerr(ads,fn,lno,"sortlist entry `%.*s' too long",l,word); |
09957b1c |
172 | continue; |
173 | } |
174 | |
78bcc172 |
175 | memcpy(tbuf,word,l); tbuf[l]= 0; |
09957b1c |
176 | slash= strchr(tbuf,'/'); |
177 | if (slash) *slash++= 0; |
178 | |
179 | if (!inet_aton(tbuf,&base)) { |
180 | configparseerr(ads,fn,lno,"invalid address `%s' in sortlist",tbuf); |
181 | continue; |
182 | } |
183 | |
184 | if (slash) { |
185 | if (strchr(slash,'.')) { |
186 | if (!inet_aton(slash,&mask)) { |
187 | configparseerr(ads,fn,lno,"invalid mask `%s' in sortlist",slash); |
188 | continue; |
189 | } |
190 | if (base.s_addr & ~mask.s_addr) { |
609133ee |
191 | configparseerr(ads,fn,lno, "mask `%s' in sortlist" |
192 | " overlaps address `%s'",slash,tbuf); |
09957b1c |
193 | continue; |
194 | } |
195 | } else { |
196 | initial= strtoul(slash,&ep,10); |
197 | if (*ep || initial>32) { |
198 | configparseerr(ads,fn,lno,"mask length `%s' invalid",slash); |
199 | continue; |
200 | } |
201 | mask.s_addr= htonl((0x0ffffffffUL) << (32-initial)); |
202 | } |
203 | } else { |
204 | baselocal= ntohl(base.s_addr); |
205 | if (!baselocal & 0x080000000UL) /* class A */ |
206 | mask.s_addr= htonl(0x0ff000000UL); |
207 | else if ((baselocal & 0x0c0000000UL) == 0x080000000UL) |
208 | mask.s_addr= htonl(0x0ffff0000UL); /* class B */ |
209 | else if ((baselocal & 0x0f0000000UL) == 0x0e0000000UL) |
210 | mask.s_addr= htonl(0x0ff000000UL); /* class C */ |
211 | else { |
609133ee |
212 | configparseerr(ads,fn,lno, "network address `%s'" |
213 | " in sortlist is not in classed ranges," |
09957b1c |
214 | " must specify mask explicitly", tbuf); |
215 | continue; |
216 | } |
217 | } |
218 | |
219 | ads->sortlist[ads->nsortlist].base= base; |
220 | ads->sortlist[ads->nsortlist].mask= mask; |
221 | ads->nsortlist++; |
222 | } |
656b2da9 |
223 | } |
224 | |
609133ee |
225 | static void ccf_options(adns_state ads, const char *fn, |
226 | int lno, const char *buf) { |
78bcc172 |
227 | const char *word; |
228 | char *ep; |
229 | unsigned long v; |
230 | int l; |
231 | |
656b2da9 |
232 | if (!buf) return; |
78bcc172 |
233 | |
234 | while (nextword(&buf,&word,&l)) { |
235 | if (l==5 && !memcmp(word,"debug",5)) { |
236 | ads->iflags |= adns_if_debug; |
237 | continue; |
238 | } |
239 | if (l>=6 && !memcmp(word,"ndots:",6)) { |
240 | v= strtoul(word+6,&ep,10); |
241 | if (l==6 || ep != word+l || v > INT_MAX) { |
609133ee |
242 | configparseerr(ads,fn,lno,"option `%.*s' malformed" |
243 | " or has bad value",l,word); |
78bcc172 |
244 | continue; |
245 | } |
246 | ads->searchndots= v; |
247 | continue; |
248 | } |
3e2e5fab |
249 | if (l>=12 && !memcmp(word,"adns_checkc:",12)) { |
250 | if (!strcmp(word+12,"none")) { |
251 | ads->iflags &= ~adns_if_checkc_freq; |
252 | ads->iflags |= adns_if_checkc_entex; |
253 | } else if (!strcmp(word+12,"entex")) { |
254 | ads->iflags &= ~adns_if_checkc_freq; |
255 | ads->iflags |= adns_if_checkc_entex; |
256 | } else if (!strcmp(word+12,"freq")) { |
257 | ads->iflags |= adns_if_checkc_freq; |
258 | } else { |
259 | configparseerr(ads,fn,lno, "option adns_checkc has bad value `%s' " |
260 | "(must be none, entex or freq", word+12); |
261 | } |
262 | continue; |
263 | } |
78bcc172 |
264 | adns__diag(ads,-1,0,"%s:%d: unknown option `%.*s'", fn,lno, l,word); |
265 | } |
656b2da9 |
266 | } |
267 | |
609133ee |
268 | static void ccf_clearnss(adns_state ads, const char *fn, |
269 | int lno, const char *buf) { |
656b2da9 |
270 | ads->nservers= 0; |
271 | } |
272 | |
609133ee |
273 | static void ccf_include(adns_state ads, const char *fn, |
274 | int lno, const char *buf) { |
36369543 |
275 | if (!*buf) { |
276 | configparseerr(ads,fn,lno,"`include' directive with no filename"); |
277 | return; |
278 | } |
fb7fbb66 |
279 | readconfig(ads,buf,1); |
36369543 |
280 | } |
281 | |
0f15dd7b |
282 | static void ccf_lookup(adns_state ads, const char *fn, int lno, |
283 | const char *buf) { |
284 | int found_bind=0; |
285 | const char *word; |
286 | int l; |
287 | |
288 | if (!*buf) { |
289 | configparseerr(ads,fn,lno,"`lookup' directive with no databases"); |
290 | return; |
291 | } |
292 | |
293 | while (nextword(&buf,&word,&l)) { |
294 | if (l==4 && !memcmp(word,"bind",4)) { |
295 | found_bind=1; |
296 | } else if (l==4 && !memcmp(word,"file",4)) { |
297 | /* ignore this and hope /etc/hosts is not essential */ |
298 | } else if (l==2 && !memcmp(word,"yp",2)) { |
299 | adns__diag(ads,-1,0,"%s:%d: yp lookups not supported by adns", fn,lno); |
300 | found_bind=-1; |
301 | } else { |
302 | adns__diag(ads,-1,0,"%s:%d: unknown `lookup' database `%.*s'", |
303 | fn,lno, l,word); |
304 | found_bind=-1; |
305 | } |
306 | } |
307 | if (!found_bind) |
308 | adns__diag(ads,-1,0,"%s:%d: `lookup' specified, but not `bind'", fn,lno); |
309 | } |
310 | |
656b2da9 |
311 | static const struct configcommandinfo { |
312 | const char *name; |
313 | void (*fn)(adns_state ads, const char *fn, int lno, const char *buf); |
314 | } configcommandinfos[]= { |
315 | { "nameserver", ccf_nameserver }, |
316 | { "domain", ccf_search }, |
317 | { "search", ccf_search }, |
318 | { "sortlist", ccf_sortlist }, |
319 | { "options", ccf_options }, |
320 | { "clearnameservers", ccf_clearnss }, |
36369543 |
321 | { "include", ccf_include }, |
0f15dd7b |
322 | { "lookup", ccf_lookup }, /* OpenBSD */ |
656b2da9 |
323 | { 0 } |
324 | }; |
325 | |
36369543 |
326 | typedef union { |
656b2da9 |
327 | FILE *file; |
36369543 |
328 | const char *text; |
329 | } getline_ctx; |
656b2da9 |
330 | |
36369543 |
331 | static int gl_file(adns_state ads, getline_ctx *src_io, const char *filename, |
332 | int lno, char *buf, int buflen) { |
333 | FILE *file= src_io->file; |
334 | int c, i; |
335 | char *p; |
336 | |
337 | p= buf; |
338 | buflen--; |
339 | i= 0; |
340 | |
341 | for (;;) { /* loop over chars */ |
342 | if (i == buflen) { |
343 | adns__diag(ads,-1,0,"%s:%d: line too long, ignored",filename,lno); |
344 | goto x_badline; |
345 | } |
346 | c= getc(file); |
347 | if (!c) { |
348 | adns__diag(ads,-1,0,"%s:%d: line contains nul, ignored",filename,lno); |
349 | goto x_badline; |
350 | } else if (c == '\n') { |
351 | break; |
352 | } else if (c == EOF) { |
353 | if (ferror(file)) { |
354 | saveerr(ads,errno); |
609133ee |
355 | adns__diag(ads,-1,0,"%s:%d: read error: %s", |
356 | filename,lno,strerror(errno)); |
36369543 |
357 | return -1; |
358 | } |
359 | if (!i) return -1; |
360 | break; |
361 | } else { |
362 | *p++= c; |
363 | i++; |
656b2da9 |
364 | } |
656b2da9 |
365 | } |
366 | |
36369543 |
367 | *p++= 0; |
368 | return i; |
369 | |
370 | x_badline: |
371 | saveerr(ads,EINVAL); |
372 | while ((c= getc(file)) != EOF && c != '\n'); |
373 | return -2; |
374 | } |
375 | |
376 | static int gl_text(adns_state ads, getline_ctx *src_io, const char *filename, |
377 | int lno, char *buf, int buflen) { |
09957b1c |
378 | const char *cp= src_io->text; |
36369543 |
379 | int l; |
380 | |
09957b1c |
381 | if (!cp || !*cp) return -1; |
36369543 |
382 | |
09957b1c |
383 | if (*cp == ';' || *cp == '\n') cp++; |
384 | l= strcspn(cp,";\n"); |
385 | src_io->text = cp+l; |
36369543 |
386 | |
387 | if (l >= buflen) { |
388 | adns__diag(ads,-1,0,"%s:%d: line too long, ignored",filename,lno); |
389 | saveerr(ads,EINVAL); |
390 | return -2; |
391 | } |
392 | |
393 | memcpy(buf,cp,l); |
394 | buf[l]= 0; |
395 | return l; |
396 | } |
397 | |
398 | static void readconfiggeneric(adns_state ads, const char *filename, |
399 | int (*getline)(adns_state ads, getline_ctx*, |
400 | const char *filename, int lno, |
401 | char *buf, int buflen), |
402 | /* Returns >=0 for success, -1 for EOF or error |
403 | * (error will have been reported), or -2 for |
404 | * bad line was encountered, try again. |
405 | */ |
406 | getline_ctx gl_ctx) { |
407 | char linebuf[2000], *p, *q; |
408 | int lno, l, dirl; |
409 | const struct configcommandinfo *ccip; |
410 | |
411 | for (lno=1; |
412 | (l= getline(ads,&gl_ctx, filename,lno, linebuf,sizeof(linebuf))) != -1; |
413 | lno++) { |
414 | if (l == -2) continue; |
656b2da9 |
415 | while (l>0 && ctype_whitespace(linebuf[l-1])) l--; |
416 | linebuf[l]= 0; |
417 | p= linebuf; |
418 | while (ctype_whitespace(*p)) p++; |
2d230487 |
419 | if (*p == '#' || *p == ';' || !*p) continue; |
656b2da9 |
420 | q= p; |
421 | while (*q && !ctype_whitespace(*q)) q++; |
36369543 |
422 | dirl= q-p; |
656b2da9 |
423 | for (ccip=configcommandinfos; |
609133ee |
424 | ccip->name && |
425 | !(strlen(ccip->name)==dirl && !memcmp(ccip->name,p,q-p)); |
656b2da9 |
426 | ccip++); |
427 | if (!ccip->name) { |
3955725c |
428 | adns__diag(ads,-1,0,"%s:%d: unknown configuration directive `%.*s'", |
4353a5c4 |
429 | filename,lno,q-p,p); |
656b2da9 |
430 | continue; |
431 | } |
432 | while (ctype_whitespace(*q)) q++; |
433 | ccip->fn(ads,filename,lno,q); |
434 | } |
656b2da9 |
435 | } |
436 | |
437 | static const char *instrum_getenv(adns_state ads, const char *envvar) { |
438 | const char *value; |
439 | |
440 | value= getenv(envvar); |
3955725c |
441 | if (!value) adns__debug(ads,-1,0,"environment variable %s not set",envvar); |
609133ee |
442 | else adns__debug(ads,-1,0,"environment variable %s" |
443 | " set to `%s'",envvar,value); |
656b2da9 |
444 | return value; |
445 | } |
446 | |
fb7fbb66 |
447 | static void readconfig(adns_state ads, const char *filename, int warnmissing) { |
36369543 |
448 | getline_ctx gl_ctx; |
449 | |
450 | gl_ctx.file= fopen(filename,"r"); |
451 | if (!gl_ctx.file) { |
452 | if (errno == ENOENT) { |
fb7fbb66 |
453 | if (warnmissing) |
609133ee |
454 | adns__debug(ads,-1,0, "configuration file" |
455 | " `%s' does not exist",filename); |
36369543 |
456 | return; |
457 | } |
458 | saveerr(ads,errno); |
459 | adns__diag(ads,-1,0,"cannot open configuration file `%s': %s", |
460 | filename,strerror(errno)); |
461 | return; |
462 | } |
463 | |
464 | readconfiggeneric(ads,filename,gl_file,gl_ctx); |
465 | |
466 | fclose(gl_ctx.file); |
467 | } |
468 | |
609133ee |
469 | static void readconfigtext(adns_state ads, const char *text, |
470 | const char *showname) { |
36369543 |
471 | getline_ctx gl_ctx; |
472 | |
473 | gl_ctx.text= text; |
474 | readconfiggeneric(ads,showname,gl_text,gl_ctx); |
475 | } |
476 | |
656b2da9 |
477 | static void readconfigenv(adns_state ads, const char *envvar) { |
478 | const char *filename; |
479 | |
480 | if (ads->iflags & adns_if_noenv) { |
3955725c |
481 | adns__debug(ads,-1,0,"not checking environment variable `%s'",envvar); |
656b2da9 |
482 | return; |
483 | } |
484 | filename= instrum_getenv(ads,envvar); |
fb7fbb66 |
485 | if (filename) readconfig(ads,filename,1); |
656b2da9 |
486 | } |
4353a5c4 |
487 | |
09957b1c |
488 | static void readconfigenvtext(adns_state ads, const char *envvar) { |
489 | const char *textdata; |
490 | |
491 | if (ads->iflags & adns_if_noenv) { |
492 | adns__debug(ads,-1,0,"not checking environment variable `%s'",envvar); |
493 | return; |
494 | } |
495 | textdata= instrum_getenv(ads,envvar); |
496 | if (textdata) readconfigtext(ads,textdata,envvar); |
497 | } |
498 | |
4353a5c4 |
499 | |
500 | int adns__setnonblock(adns_state ads, int fd) { |
501 | int r; |
656b2da9 |
502 | |
4353a5c4 |
503 | r= fcntl(fd,F_GETFL,0); if (r<0) return errno; |
504 | r |= O_NONBLOCK; |
505 | r= fcntl(fd,F_SETFL,r); if (r<0) return errno; |
506 | return 0; |
507 | } |
508 | |
609133ee |
509 | static int init_begin(adns_state *ads_r, adns_initflags flags, |
510 | FILE *diagfile) { |
656b2da9 |
511 | adns_state ads; |
656b2da9 |
512 | |
513 | ads= malloc(sizeof(*ads)); if (!ads) return errno; |
36369543 |
514 | |
656b2da9 |
515 | ads->iflags= flags; |
36369543 |
516 | ads->diagfile= diagfile; |
d855b532 |
517 | ads->configerrno= 0; |
f7f83b4a |
518 | LIST_INIT(ads->udpw); |
519 | LIST_INIT(ads->tcpw); |
4353a5c4 |
520 | LIST_INIT(ads->childw); |
521 | LIST_INIT(ads->output); |
8ce38e76 |
522 | ads->forallnext= 0; |
4353a5c4 |
523 | ads->nextid= 0x311f; |
524 | ads->udpsocket= ads->tcpsocket= -1; |
4353a5c4 |
525 | adns__vbuf_init(&ads->tcpsend); |
526 | adns__vbuf_init(&ads->tcprecv); |
70ad7a2a |
527 | ads->tcprecv_skip= 0; |
32af6b2a |
528 | ads->nservers= ads->nsortlist= ads->nsearchlist= ads->tcpserver= 0; |
660d7d3b |
529 | ads->searchndots= 1; |
d855b532 |
530 | ads->tcpstate= server_disconnected; |
4353a5c4 |
531 | timerclear(&ads->tcptimeout); |
d855b532 |
532 | ads->searchlist= 0; |
656b2da9 |
533 | |
36369543 |
534 | *ads_r= ads; |
535 | return 0; |
536 | } |
656b2da9 |
537 | |
36369543 |
538 | static int init_finish(adns_state ads) { |
539 | struct in_addr ia; |
540 | struct protoent *proto; |
541 | int r; |
542 | |
656b2da9 |
543 | if (!ads->nservers) { |
36369543 |
544 | if (ads->diagfile && ads->iflags & adns_if_debug) |
545 | fprintf(ads->diagfile,"adns: no nameservers, using localhost\n"); |
09957b1c |
546 | ia.s_addr= htonl(INADDR_LOOPBACK); |
656b2da9 |
547 | addserver(ads,ia); |
548 | } |
549 | |
550 | proto= getprotobyname("udp"); if (!proto) { r= ENOPROTOOPT; goto x_free; } |
551 | ads->udpsocket= socket(AF_INET,SOCK_DGRAM,proto->p_proto); |
8402e34c |
552 | if (ads->udpsocket<0) { r= errno; goto x_free; } |
4bec51a4 |
553 | |
94436798 |
554 | r= adns__setnonblock(ads,ads->udpsocket); |
555 | if (r) { r= errno; goto x_closeudp; } |
656b2da9 |
556 | |
656b2da9 |
557 | return 0; |
558 | |
94436798 |
559 | x_closeudp: |
560 | close(ads->udpsocket); |
656b2da9 |
561 | x_free: |
562 | free(ads); |
563 | return r; |
564 | } |
565 | |
32af6b2a |
566 | static void init_abort(adns_state ads) { |
567 | if (ads->nsearchlist) { |
568 | free(ads->searchlist[0]); |
569 | free(ads->searchlist); |
570 | } |
571 | free(ads); |
572 | } |
573 | |
e563872a |
574 | int adns_init(adns_state *ads_r, adns_initflags flags, FILE *diagfile) { |
36369543 |
575 | adns_state ads; |
576 | const char *res_options, *adns_res_options; |
577 | int r; |
578 | |
579 | r= init_begin(&ads, flags, diagfile ? diagfile : stderr); |
580 | if (r) return r; |
581 | |
582 | res_options= instrum_getenv(ads,"RES_OPTIONS"); |
583 | adns_res_options= instrum_getenv(ads,"ADNS_RES_OPTIONS"); |
584 | ccf_options(ads,"RES_OPTIONS",-1,res_options); |
585 | ccf_options(ads,"ADNS_RES_OPTIONS",-1,adns_res_options); |
586 | |
fb7fbb66 |
587 | readconfig(ads,"/etc/resolv.conf",1); |
588 | readconfig(ads,"/etc/resolv-adns.conf",0); |
36369543 |
589 | readconfigenv(ads,"RES_CONF"); |
590 | readconfigenv(ads,"ADNS_RES_CONF"); |
591 | |
09957b1c |
592 | readconfigenvtext(ads,"RES_CONF_TEXT"); |
593 | readconfigenvtext(ads,"ADNS_RES_CONF_TEXT"); |
594 | |
36369543 |
595 | ccf_options(ads,"RES_OPTIONS",-1,res_options); |
596 | ccf_options(ads,"ADNS_RES_OPTIONS",-1,adns_res_options); |
597 | |
598 | ccf_search(ads,"LOCALDOMAIN",-1,instrum_getenv(ads,"LOCALDOMAIN")); |
599 | ccf_search(ads,"ADNS_LOCALDOMAIN",-1,instrum_getenv(ads,"ADNS_LOCALDOMAIN")); |
600 | |
32af6b2a |
601 | if (ads->configerrno && ads->configerrno != EINVAL) { |
602 | r= ads->configerrno; |
603 | init_abort(ads); |
604 | return r; |
605 | } |
606 | |
36369543 |
607 | r= init_finish(ads); |
608 | if (r) return r; |
609 | |
28de6442 |
610 | adns__consistency(ads,0,cc_entex); |
36369543 |
611 | *ads_r= ads; |
612 | return 0; |
613 | } |
614 | |
e563872a |
615 | int adns_init_strcfg(adns_state *ads_r, adns_initflags flags, |
36369543 |
616 | FILE *diagfile, const char *configtext) { |
617 | adns_state ads; |
618 | int r; |
619 | |
620 | r= init_begin(&ads, flags, diagfile); if (r) return r; |
621 | |
622 | readconfigtext(ads,configtext,"<supplied configuration text>"); |
623 | if (ads->configerrno) { |
624 | r= ads->configerrno; |
32af6b2a |
625 | init_abort(ads); |
36369543 |
626 | return r; |
627 | } |
628 | |
629 | r= init_finish(ads); if (r) return r; |
28de6442 |
630 | adns__consistency(ads,0,cc_entex); |
36369543 |
631 | *ads_r= ads; |
632 | return 0; |
633 | } |
634 | |
3e2e5fab |
635 | |
9ec44266 |
636 | void adns_finish(adns_state ads) { |
28de6442 |
637 | adns__consistency(ads,0,cc_entex); |
9ec44266 |
638 | for (;;) { |
f7f83b4a |
639 | if (ads->udpw.head) adns_cancel(ads->udpw.head); |
640 | else if (ads->tcpw.head) adns_cancel(ads->tcpw.head); |
9ec44266 |
641 | else if (ads->childw.head) adns_cancel(ads->childw.head); |
642 | else if (ads->output.head) adns_cancel(ads->output.head); |
643 | else break; |
644 | } |
645 | close(ads->udpsocket); |
646 | if (ads->tcpsocket >= 0) close(ads->tcpsocket); |
647 | adns__vbuf_free(&ads->tcpsend); |
648 | adns__vbuf_free(&ads->tcprecv); |
914a5ff5 |
649 | freesearchlist(ads); |
9ec44266 |
650 | free(ads); |
656b2da9 |
651 | } |
8ce38e76 |
652 | |
653 | void adns_forallqueries_begin(adns_state ads) { |
28de6442 |
654 | adns__consistency(ads,0,cc_entex); |
8ce38e76 |
655 | ads->forallnext= |
f7f83b4a |
656 | ads->udpw.head ? ads->udpw.head : |
657 | ads->tcpw.head ? ads->tcpw.head : |
8ce38e76 |
658 | ads->childw.head ? ads->childw.head : |
659 | ads->output.head; |
660 | } |
661 | |
662 | adns_query adns_forallqueries_next(adns_state ads, void **context_r) { |
663 | adns_query qu, nqu; |
664 | |
28de6442 |
665 | adns__consistency(ads,0,cc_entex); |
8ce38e76 |
666 | nqu= ads->forallnext; |
667 | for (;;) { |
668 | qu= nqu; |
669 | if (!qu) return 0; |
4218fb9a |
670 | if (qu->next) { |
671 | nqu= qu->next; |
f7f83b4a |
672 | } else if (qu == ads->udpw.tail) { |
673 | nqu= |
674 | ads->tcpw.head ? ads->tcpw.head : |
675 | ads->childw.head ? ads->childw.head : |
676 | ads->output.head; |
677 | } else if (qu == ads->tcpw.tail) { |
678 | nqu= |
679 | ads->childw.head ? ads->childw.head : |
680 | ads->output.head; |
4218fb9a |
681 | } else if (qu == ads->childw.tail) { |
682 | nqu= ads->output.head; |
683 | } else { |
684 | nqu= 0; |
685 | } |
8ce38e76 |
686 | if (!qu->parent) break; |
687 | } |
688 | ads->forallnext= nqu; |
689 | if (context_r) *context_r= qu->ctx.ext; |
690 | return qu; |
691 | } |