e576be50 |
1 | /* |
2 | * types.c |
3 | * - RR-type-specific code, and the machinery to call it |
4 | */ |
5 | /* |
a719a4be |
6 | * This file is part of adns, which is Copyright (C) 1997-1999 Ian Jackson |
e576be50 |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 2, or (at your option) |
11 | * any later version. |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | * GNU General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program; if not, write to the Free Software Foundation, |
20 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
21 | */ |
98a3f706 |
22 | |
1b644113 |
23 | #include <stdlib.h> |
828d89bd |
24 | #include <string.h> |
1b644113 |
25 | |
71a6ff46 |
26 | #include <sys/socket.h> |
27 | #include <netinet/in.h> |
86e7b8d9 |
28 | #include <arpa/inet.h> |
29 | |
98a3f706 |
30 | #include "internal.h" |
31 | |
ea1e31e3 |
32 | #define R_NOMEM return adns_s_nomemory |
1dfe95d8 |
33 | #define CSP_ADDSTR(s) if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; else; |
34 | |
eb81d633 |
35 | /* |
36 | * order of sections: |
37 | * |
9ec44266 |
38 | * _string (pap) |
eb81d633 |
39 | * _textdata, _qstring (csp) |
40 | * _str (mf,cs) |
9ec44266 |
41 | * _intstr (mf,csp,cs) |
eb81d633 |
42 | * _manyistr (mf,cs) |
43 | * _txt (pa) |
44 | * _inaddr (pa,dip,di) |
45 | * _addr (pa,di,csp,cs) |
46 | * _domain (pap) |
47 | * _host_raw (pa) |
48 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs) |
49 | * _mx_raw (pa,di) |
50 | * _mx (pa,di) |
51 | * _inthostaddr (mf,cs) |
a6536d8b |
52 | * _ptr (pa) |
9ec44266 |
53 | * _strpair (mf,cs) |
54 | * _intstrpair (mf,cs) |
55 | * _hinfo (pa) |
56 | * _mailbox (pap) |
57 | * _rp (pa) |
58 | * _soa (pa,mf,cs) |
eb81d633 |
59 | * _flat (mf) |
60 | * |
61 | * within each section: |
62 | * pap_* |
63 | * pa_* |
64 | * dip_* |
65 | * di_* |
66 | * mfp_* |
67 | * mf_* |
68 | * csp_* |
69 | * cs_* |
70 | */ |
71 | |
72 | /* |
9ec44266 |
73 | * _string (pap) |
eb81d633 |
74 | * _textdata, _qstring (csp) |
75 | */ |
76 | |
9ec44266 |
77 | static adns_status pap_string(const parseinfo *pai, int *cbyte_io, int max, |
78 | int *len_r, char **str_r) { |
79 | /* Neither len_r nor str_r may be null. |
80 | * End of datagram (overrun) is indicated by returning adns_s_invaliddata; |
81 | */ |
82 | const byte *dgram= pai->dgram; |
83 | int l, cbyte; |
84 | char *str; |
85 | |
86 | cbyte= *cbyte_io; |
87 | |
88 | if (cbyte >= max) return adns_s_invaliddata; |
89 | GET_B(cbyte,l); |
90 | if (cbyte+l > max) return adns_s_invaliddata; |
91 | |
92 | str= adns__alloc_interim(pai->qu, l+1); |
93 | if (!str) R_NOMEM; |
94 | |
95 | str[l]= 0; |
96 | memcpy(str,dgram+cbyte,l); |
97 | |
98 | *len_r= l; |
99 | *str_r= str; |
100 | *cbyte_io= cbyte+l; |
101 | |
102 | return adns_s_ok; |
103 | } |
104 | |
eb81d633 |
105 | static adns_status csp_textdata(vbuf *vb, const char *dp, int len) { |
106 | unsigned char ch; |
107 | char buf[10]; |
108 | int cn; |
109 | |
110 | CSP_ADDSTR("\""); |
111 | for (cn=0; cn<len; cn++) { |
112 | ch= *dp++; |
113 | if (ch >= 32 && ch <= 126 && ch != '"' && ch != '\\') { |
114 | if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM; |
9ec44266 |
115 | } else if (ch == '\\') { |
116 | CSP_ADDSTR("\\\\"); |
eb81d633 |
117 | } else { |
9ec44266 |
118 | sprintf(buf,"\\x%02x",ch); |
eb81d633 |
119 | CSP_ADDSTR(buf); |
120 | } |
121 | } |
122 | CSP_ADDSTR("\""); |
123 | |
124 | return adns_s_ok; |
125 | } |
126 | |
127 | static adns_status csp_qstring(vbuf *vb, const char *dp) { |
128 | return csp_textdata(vb, dp, strlen(dp)); |
129 | } |
130 | |
131 | /* |
132 | * _str (mf,cs) |
133 | */ |
134 | |
135 | static void mf_str(adns_query qu, void *datap) { |
136 | char **rrp= datap; |
137 | |
138 | adns__makefinal_str(qu,rrp); |
139 | } |
140 | |
141 | static adns_status cs_str(vbuf *vb, const void *datap) { |
142 | const char *const *rrp= datap; |
143 | |
144 | return csp_qstring(vb,*rrp); |
145 | } |
146 | |
147 | /* |
9ec44266 |
148 | * _intstr (mf,csp,cs) |
eb81d633 |
149 | */ |
150 | |
151 | static void mf_intstr(adns_query qu, void *datap) { |
152 | adns_rr_intstr *rrp= datap; |
153 | |
154 | adns__makefinal_str(qu,&rrp->str); |
155 | } |
156 | |
9ec44266 |
157 | static adns_status csp_intstr(vbuf *vb, const adns_rr_intstr *rrp) { |
eb81d633 |
158 | char buf[10]; |
159 | |
160 | sprintf(buf,"%u ",rrp->i); |
161 | CSP_ADDSTR(buf); |
162 | return csp_qstring(vb,rrp->str); |
163 | } |
164 | |
9ec44266 |
165 | static adns_status cs_intstr(vbuf *vb, const void *datap) { |
166 | const adns_rr_intstr *rrp= datap; |
167 | |
168 | return csp_intstr(vb,rrp); |
169 | } |
170 | |
eb81d633 |
171 | /* |
172 | * _manyistr (mf,cs) |
173 | */ |
174 | |
175 | static void mf_manyistr(adns_query qu, void *datap) { |
176 | adns_rr_intstr **rrp= datap; |
177 | adns_rr_intstr *te, *table; |
178 | void *tablev; |
179 | int tc; |
180 | |
181 | for (tc=0, te= *rrp; te->i >= 0; te++, tc++); |
182 | tablev= *rrp; |
183 | adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1)); |
184 | *rrp= table= tablev; |
185 | for (te= *rrp; te->i >= 0; te++) |
186 | adns__makefinal_str(qu,&te->str); |
187 | } |
188 | |
189 | static adns_status cs_manyistr(vbuf *vb, const void *datap) { |
190 | const adns_rr_intstr *const *rrp= datap; |
191 | const adns_rr_intstr *current; |
192 | adns_status st; |
193 | int spc; |
194 | |
195 | for (spc=0, current= *rrp; current->i >= 0; current++) { |
196 | if (spc) CSP_ADDSTR(" "); |
197 | st= csp_textdata(vb,current->str,current->i); if (st) return st; |
198 | } |
199 | return adns_s_ok; |
200 | } |
201 | |
202 | /* |
203 | * _txt (pa) |
204 | */ |
205 | |
206 | static adns_status pa_txt(const parseinfo *pai, int cbyte, int max, void *datap) { |
207 | adns_rr_intstr **rrp= datap, *table, *te; |
208 | const byte *dgram= pai->dgram; |
209 | int ti, tc, l, startbyte; |
9ec44266 |
210 | adns_status st; |
eb81d633 |
211 | |
212 | startbyte= cbyte; |
213 | if (cbyte >= max) return adns_s_invaliddata; |
214 | tc= 0; |
215 | while (cbyte < max) { |
216 | GET_B(cbyte,l); |
217 | cbyte+= l; |
9ec44266 |
218 | tc++; |
eb81d633 |
219 | } |
220 | if (cbyte != max) return adns_s_invaliddata; |
221 | |
222 | table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1)); |
223 | if (!table) R_NOMEM; |
224 | |
225 | for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) { |
9ec44266 |
226 | st= pap_string(pai, &cbyte, max, &te->i, &te->str); |
227 | if (st) return st; |
eb81d633 |
228 | } |
229 | assert(cbyte == max); |
230 | |
231 | te->i= -1; |
232 | te->str= 0; |
233 | |
234 | *rrp= table; |
235 | return adns_s_ok; |
828d89bd |
236 | } |
237 | |
eb81d633 |
238 | /* |
239 | * _inaddr (pa,dip,di) |
240 | */ |
241 | |
1dfe95d8 |
242 | static adns_status pa_inaddr(const parseinfo *pai, int cbyte, int max, void *datap) { |
e062dcae |
243 | struct in_addr *storeto= datap; |
e7a9ca47 |
244 | |
245 | if (max-cbyte != 4) return adns_s_invaliddata; |
1dfe95d8 |
246 | memcpy(storeto, pai->dgram + cbyte, 4); |
e7a9ca47 |
247 | return adns_s_ok; |
248 | } |
249 | |
09957b1c |
250 | static int search_sortlist(adns_state ads, struct in_addr ad) { |
251 | const struct sortlist *slp; |
252 | int i; |
253 | |
254 | for (i=0, slp=ads->sortlist; |
255 | i<ads->nsortlist && !((ad.s_addr & slp->mask.s_addr) == slp->base.s_addr); |
256 | i++, slp++); |
257 | return i; |
eb81d633 |
258 | } |
259 | |
09957b1c |
260 | static int dip_inaddr(adns_state ads, struct in_addr a, struct in_addr b) { |
261 | int ai, bi; |
262 | |
263 | if (!ads->nsortlist) return 0; |
264 | |
265 | ai= search_sortlist(ads,a); |
266 | bi= search_sortlist(ads,b); |
267 | return bi<ai; |
268 | } |
269 | |
270 | static int di_inaddr(adns_state ads, const void *datap_a, const void *datap_b) { |
e062dcae |
271 | const struct in_addr *ap= datap_a, *bp= datap_b; |
272 | |
09957b1c |
273 | return dip_inaddr(ads,*ap,*bp); |
e062dcae |
274 | } |
275 | |
276 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { |
277 | const struct in_addr *rrp= datap, rr= *rrp; |
86e7b8d9 |
278 | const char *ia; |
279 | |
e062dcae |
280 | ia= inet_ntoa(rr); assert(ia); |
1dfe95d8 |
281 | CSP_ADDSTR(ia); |
282 | return adns_s_ok; |
86e7b8d9 |
283 | } |
e7a9ca47 |
284 | |
eb81d633 |
285 | /* |
286 | * _addr (pa,di,csp,cs) |
287 | */ |
288 | |
1dfe95d8 |
289 | static adns_status pa_addr(const parseinfo *pai, int cbyte, int max, void *datap) { |
551ff40f |
290 | adns_rr_addr *storeto= datap; |
1dfe95d8 |
291 | const byte *dgram= pai->dgram; |
c7836bc9 |
292 | |
828d89bd |
293 | if (max-cbyte != 4) return adns_s_invaliddata; |
294 | storeto->len= sizeof(storeto->addr.inet); |
295 | memset(&storeto->addr,0,sizeof(storeto->addr.inet)); |
296 | storeto->addr.inet.sin_family= AF_INET; |
828d89bd |
297 | memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4); |
298 | return adns_s_ok; |
299 | } |
300 | |
09957b1c |
301 | static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) { |
551ff40f |
302 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
828d89bd |
303 | |
1dfe95d8 |
304 | assert(ap->addr.sa.sa_family == AF_INET); |
09957b1c |
305 | return dip_inaddr(ads, ap->addr.inet.sin_addr, bp->addr.inet.sin_addr); |
828d89bd |
306 | } |
307 | |
09957b1c |
308 | static int div_addr(void *context, const void *datap_a, const void *datap_b) { |
309 | const adns_state ads= context; |
310 | |
311 | return di_addr(ads, datap_a, datap_b); |
312 | } |
313 | |
551ff40f |
314 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
828d89bd |
315 | const char *ia; |
316 | static char buf[30]; |
317 | |
318 | switch (rrp->addr.inet.sin_family) { |
319 | case AF_INET: |
1dfe95d8 |
320 | CSP_ADDSTR("AF_INET "); |
828d89bd |
321 | ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia); |
1dfe95d8 |
322 | CSP_ADDSTR(ia); |
828d89bd |
323 | break; |
324 | default: |
325 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); |
1dfe95d8 |
326 | CSP_ADDSTR(buf); |
828d89bd |
327 | break; |
328 | } |
329 | return adns_s_ok; |
330 | } |
331 | |
1dfe95d8 |
332 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
551ff40f |
333 | const adns_rr_addr *rrp= datap; |
1dfe95d8 |
334 | |
335 | return csp_addr(vb,rrp); |
336 | } |
337 | |
eb81d633 |
338 | /* |
339 | * _domain (pap) |
340 | */ |
341 | |
1dfe95d8 |
342 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
343 | char **domain_r, parsedomain_flags flags) { |
e062dcae |
344 | adns_status st; |
345 | char *dm; |
346 | |
1dfe95d8 |
347 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
348 | pai->dgram,pai->dglen, cbyte_io, max); |
e062dcae |
349 | if (st) return st; |
1dfe95d8 |
350 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
e062dcae |
351 | |
1dfe95d8 |
352 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
353 | if (!dm) R_NOMEM; |
e062dcae |
354 | |
1dfe95d8 |
355 | dm[pai->qu->vb.used]= 0; |
356 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); |
e062dcae |
357 | |
358 | *domain_r= dm; |
359 | return adns_s_ok; |
360 | } |
361 | |
eb81d633 |
362 | /* |
363 | * _host_raw (pa) |
364 | */ |
365 | |
1dfe95d8 |
366 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, int max, void *datap) { |
e062dcae |
367 | char **rrp= datap; |
ffbda80c |
368 | adns_status st; |
86e7b8d9 |
369 | |
1dfe95d8 |
370 | st= pap_domain(pai, &cbyte, max, rrp, |
371 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
e062dcae |
372 | if (st) return st; |
373 | |
374 | if (cbyte != max) return adns_s_invaliddata; |
375 | return adns_s_ok; |
376 | } |
ffbda80c |
377 | |
eb81d633 |
378 | /* |
551ff40f |
379 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs) |
eb81d633 |
380 | */ |
c7836bc9 |
381 | |
1dfe95d8 |
382 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
383 | int *cbyte_io, int count, int dmstart) { |
384 | int rri, naddrs; |
c7836bc9 |
385 | int type, class, rdlen, rdstart, ownermatched; |
73dba56e |
386 | unsigned long ttl; |
1dfe95d8 |
387 | adns_status st; |
c7836bc9 |
388 | |
1dfe95d8 |
389 | for (rri=0, naddrs=-1; rri<count; rri++) { |
390 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, pai->dglen, cbyte_io, |
73dba56e |
391 | &type, &class, &ttl, &rdlen, &rdstart, |
1dfe95d8 |
392 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
c7836bc9 |
393 | if (st) return st; |
1dfe95d8 |
394 | if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) { |
395 | if (naddrs>0) break; else continue; |
396 | } |
397 | if (naddrs == -1) { |
398 | naddrs= 0; |
c7836bc9 |
399 | } |
551ff40f |
400 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_rr_addr))) R_NOMEM; |
73dba56e |
401 | adns__update_expires(pai->qu,ttl,pai->now); |
551ff40f |
402 | st= pa_addr(pai, rdstart,rdstart+rdlen, |
403 | pai->qu->vb.buf + naddrs*sizeof(adns_rr_addr)); |
c7836bc9 |
404 | if (st) return st; |
1dfe95d8 |
405 | naddrs++; |
c7836bc9 |
406 | } |
1dfe95d8 |
407 | if (naddrs >= 0) { |
551ff40f |
408 | ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_rr_addr)); |
1dfe95d8 |
409 | if (!ha->addrs) R_NOMEM; |
551ff40f |
410 | memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_rr_addr)); |
1dfe95d8 |
411 | ha->naddrs= naddrs; |
c7836bc9 |
412 | ha->astatus= adns_s_ok; |
1dfe95d8 |
413 | |
09957b1c |
414 | adns__isort(ha->addrs, naddrs, sizeof(adns_rr_addr), pai->qu->vb.buf, |
415 | div_addr, pai->ads); |
c7836bc9 |
416 | } |
417 | return adns_s_ok; |
418 | } |
419 | |
551ff40f |
420 | static void icb_hostaddr(adns_query parent, adns_query child) { |
551ff40f |
421 | adns_answer *cans= child->answer; |
a6536d8b |
422 | adns_rr_hostaddr *rrp= child->ctx.info.hostaddr; |
551ff40f |
423 | |
424 | rrp->astatus= cans->status; |
425 | rrp->naddrs= cans->nrrs; |
426 | rrp->addrs= cans->rrs.addr; |
427 | adns__transfer_interim(child, parent, rrp->addrs, rrp->naddrs*sizeof(adns_rr_addr)); |
a6536d8b |
428 | |
429 | if (!parent->children.head) adns__query_done(parent); |
551ff40f |
430 | } |
431 | |
1dfe95d8 |
432 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
433 | int max, adns_rr_hostaddr *rrp) { |
c7836bc9 |
434 | adns_status st; |
435 | int dmstart, cbyte; |
7da21070 |
436 | qcontext ctx; |
437 | int id; |
438 | adns_query nqu; |
4b707d8b |
439 | adns_queryflags nflags; |
c7836bc9 |
440 | |
441 | dmstart= cbyte= *cbyte_io; |
1dfe95d8 |
442 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
443 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
c7836bc9 |
444 | if (st) return st; |
445 | *cbyte_io= cbyte; |
446 | |
447 | rrp->astatus= adns_s_ok; |
448 | rrp->naddrs= -1; |
449 | rrp->addrs= 0; |
450 | |
1dfe95d8 |
451 | cbyte= pai->nsstart; |
c7836bc9 |
452 | |
1dfe95d8 |
453 | st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart); |
c7836bc9 |
454 | if (st) return st; |
455 | if (rrp->naddrs != -1) return adns_s_ok; |
456 | |
1dfe95d8 |
457 | st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart); |
c7836bc9 |
458 | if (st) return st; |
459 | if (rrp->naddrs != -1) return adns_s_ok; |
1dfe95d8 |
460 | |
7da21070 |
461 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
462 | pai->dgram, pai->dglen, dmstart, |
463 | adns_r_addr, adns_qf_quoteok_query); |
464 | if (st) return st; |
551ff40f |
465 | |
a6536d8b |
466 | ctx.ext= 0; |
467 | ctx.callback= icb_hostaddr; |
468 | ctx.info.hostaddr= rrp; |
4b707d8b |
469 | |
470 | nflags= adns_qf_quoteok_query; |
471 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; |
472 | |
7da21070 |
473 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
660d7d3b |
474 | &pai->qu->vb, id, nflags, pai->now, &ctx); |
7da21070 |
475 | if (st) return st; |
476 | |
477 | nqu->parent= pai->qu; |
478 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); |
1dfe95d8 |
479 | |
480 | return adns_s_ok; |
c7836bc9 |
481 | } |
482 | |
1dfe95d8 |
483 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, int max, void *datap) { |
484 | adns_rr_hostaddr *rrp= datap; |
c7836bc9 |
485 | adns_status st; |
c7836bc9 |
486 | |
1dfe95d8 |
487 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
c7836bc9 |
488 | if (st) return st; |
489 | if (cbyte != max) return adns_s_invaliddata; |
490 | |
1dfe95d8 |
491 | return adns_s_ok; |
492 | } |
c7836bc9 |
493 | |
09957b1c |
494 | static int dip_hostaddr(adns_state ads, const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { |
1dfe95d8 |
495 | if (ap->astatus != bp->astatus) return ap->astatus; |
496 | if (ap->astatus) return 0; |
c7836bc9 |
497 | |
1dfe95d8 |
498 | assert(ap->addrs[0].addr.sa.sa_family == AF_INET); |
499 | assert(bp->addrs[0].addr.sa.sa_family == AF_INET); |
09957b1c |
500 | return dip_inaddr(ads, |
501 | ap->addrs[0].addr.inet.sin_addr, |
502 | bp->addrs[0].addr.inet.sin_addr); |
1dfe95d8 |
503 | } |
504 | |
09957b1c |
505 | static int di_hostaddr(adns_state ads, const void *datap_a, const void *datap_b) { |
1dfe95d8 |
506 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
507 | |
09957b1c |
508 | return dip_hostaddr(ads, ap,bp); |
c7836bc9 |
509 | } |
510 | |
eb81d633 |
511 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
512 | void *tablev; |
e062dcae |
513 | |
eb81d633 |
514 | adns__makefinal_str(qu,&rrp->host); |
515 | tablev= rrp->addrs; |
516 | adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs)); |
517 | rrp->addrs= tablev; |
e062dcae |
518 | } |
519 | |
eb81d633 |
520 | static void mf_hostaddr(adns_query qu, void *datap) { |
521 | adns_rr_hostaddr *rrp= datap; |
e062dcae |
522 | |
eb81d633 |
523 | mfp_hostaddr(qu,rrp); |
e062dcae |
524 | } |
525 | |
1dfe95d8 |
526 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
527 | const char *to_add; |
528 | adns_status st; |
529 | int i; |
530 | |
531 | st= csp_qstring(vb,rrp->host); if (st) return st; |
532 | |
533 | if (rrp->astatus) { |
534 | CSP_ADDSTR(" - "); |
535 | CSP_ADDSTR(adns_strerror(rrp->astatus)); |
536 | } else { |
537 | assert(rrp->naddrs > 0); |
538 | for (i=0, to_add= ": "; i<rrp->naddrs; i++, to_add= ", ") { |
539 | CSP_ADDSTR(to_add); |
540 | st= csp_addr(vb,&rrp->addrs[i]); |
541 | } |
542 | } |
543 | return adns_s_ok; |
544 | } |
545 | |
546 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { |
547 | const adns_rr_hostaddr *rrp= datap; |
548 | |
549 | return csp_hostaddr(vb,rrp); |
550 | } |
551 | |
eb81d633 |
552 | /* |
553 | * _mx_raw (pa,di) |
554 | */ |
1dfe95d8 |
555 | |
eb81d633 |
556 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, int max, void *datap) { |
557 | const byte *dgram= pai->dgram; |
558 | adns_rr_intstr *rrp= datap; |
559 | adns_status st; |
560 | int pref; |
1dfe95d8 |
561 | |
eb81d633 |
562 | if (cbyte+2 > max) return adns_s_invaliddata; |
563 | GET_W(cbyte,pref); |
564 | rrp->i= pref; |
565 | st= pap_domain(pai, &cbyte, max, &rrp->str, |
566 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
567 | if (st) return st; |
1dfe95d8 |
568 | |
eb81d633 |
569 | if (cbyte != max) return adns_s_invaliddata; |
570 | return adns_s_ok; |
571 | } |
1dfe95d8 |
572 | |
09957b1c |
573 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 |
574 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
575 | |
576 | if (ap->i < bp->i) return 0; |
577 | if (ap->i > bp->i) return 1; |
578 | return 0; |
1dfe95d8 |
579 | } |
580 | |
eb81d633 |
581 | /* |
582 | * _mx (pa,di) |
583 | */ |
1dfe95d8 |
584 | |
eb81d633 |
585 | static adns_status pa_mx(const parseinfo *pai, int cbyte, int max, void *datap) { |
586 | const byte *dgram= pai->dgram; |
587 | adns_rr_inthostaddr *rrp= datap; |
588 | adns_status st; |
589 | int pref; |
590 | |
591 | if (cbyte+2 > max) return adns_s_invaliddata; |
592 | GET_W(cbyte,pref); |
593 | rrp->i= pref; |
594 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); |
595 | if (st) return st; |
596 | |
597 | if (cbyte != max) return adns_s_invaliddata; |
598 | return adns_s_ok; |
599 | } |
600 | |
09957b1c |
601 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 |
602 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
603 | |
604 | if (ap->i < bp->i) return 0; |
605 | if (ap->i > bp->i) return 1; |
09957b1c |
606 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
1dfe95d8 |
607 | } |
608 | |
eb81d633 |
609 | /* |
610 | * _inthostaddr (mf,cs) |
611 | */ |
612 | |
1dfe95d8 |
613 | static void mf_inthostaddr(adns_query qu, void *datap) { |
614 | adns_rr_inthostaddr *rrp= datap; |
615 | |
616 | mfp_hostaddr(qu,&rrp->ha); |
617 | } |
618 | |
eb81d633 |
619 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
620 | const adns_rr_inthostaddr *rrp= datap; |
621 | char buf[10]; |
e062dcae |
622 | |
eb81d633 |
623 | sprintf(buf,"%u ",rrp->i); |
624 | CSP_ADDSTR(buf); |
625 | |
626 | return csp_hostaddr(vb,&rrp->ha); |
ffbda80c |
627 | } |
628 | |
eb81d633 |
629 | /* |
a6536d8b |
630 | * _ptr (pa, +icb_ptr) |
631 | */ |
632 | |
633 | static void icb_ptr(adns_query parent, adns_query child) { |
634 | adns_answer *cans= child->answer; |
635 | const adns_rr_addr *queried, *found; |
636 | int i; |
637 | |
638 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { |
639 | adns__query_fail(parent,adns_s_inconsistent); |
640 | return; |
641 | } else if (cans->status) { |
642 | adns__query_fail(parent,cans->status); |
643 | return; |
644 | } |
645 | |
646 | queried= &parent->ctx.info.ptr_parent_addr; |
647 | for (i=0, found=cans->rrs.addr; i<cans->nrrs; i++, found++) { |
648 | if (queried->len == found->len && |
649 | !memcmp(&queried->addr,&found->addr,queried->len)) { |
650 | if (!parent->children.head) adns__query_done(parent); |
651 | return; |
652 | } |
653 | } |
654 | |
655 | adns__query_fail(parent,adns_s_inconsistent); |
656 | } |
657 | |
658 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, int max, void *datap) { |
659 | static const char *(expectdomain[])= { DNS_INADDR_ARPA }; |
660 | |
661 | char **rrp= datap; |
662 | adns_status st; |
663 | adns_rr_addr *ap; |
664 | findlabel_state fls; |
665 | char *ep; |
666 | byte ipv[4]; |
667 | char labbuf[4]; |
668 | int cbyte, i, lablen, labstart, l, id; |
669 | adns_query nqu; |
670 | qcontext ctx; |
671 | |
672 | cbyte= dmstart; |
673 | st= pap_domain(pai, &cbyte, max, rrp, |
674 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
675 | if (st) return st; |
676 | if (cbyte != max) return adns_s_invaliddata; |
677 | |
678 | ap= &pai->qu->ctx.info.ptr_parent_addr; |
679 | if (!ap->len) { |
680 | adns__findlabel_start(&fls, pai->ads, -1, pai->qu, |
681 | pai->qu->query_dgram, pai->qu->query_dglen, |
682 | pai->qu->query_dglen, DNS_HDRSIZE, 0); |
683 | for (i=0; i<4; i++) { |
684 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); |
ea1e31e3 |
685 | if (lablen<=0 || lablen>3) return adns_s_querydomainwrong; |
a6536d8b |
686 | memcpy(labbuf, pai->qu->query_dgram + labstart, lablen); labbuf[lablen]= 0; |
ea1e31e3 |
687 | ipv[3-i]= strtoul(labbuf,&ep,10); if (*ep) return adns_s_querydomainwrong; |
a6536d8b |
688 | if (lablen>1 && pai->qu->query_dgram[labstart]=='0') |
ea1e31e3 |
689 | return adns_s_querydomainwrong; |
a6536d8b |
690 | } |
691 | for (i=0; i<sizeof(expectdomain)/sizeof(*expectdomain); i++) { |
692 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); |
693 | l= strlen(expectdomain[i]); |
694 | if (lablen != l || memcmp(pai->qu->query_dgram + labstart, expectdomain[i], l)) |
ea1e31e3 |
695 | return adns_s_querydomainwrong; |
a6536d8b |
696 | } |
697 | st= adns__findlabel_next(&fls,&lablen,0); assert(!st); |
ea1e31e3 |
698 | if (lablen) return adns_s_querydomainwrong; |
a6536d8b |
699 | |
700 | ap->len= sizeof(struct sockaddr_in); |
701 | memset(&ap->addr,0,sizeof(ap->addr.inet)); |
702 | ap->addr.inet.sin_family= AF_INET; |
703 | ap->addr.inet.sin_addr.s_addr= |
704 | htonl((ipv[0]<<24) | (ipv[1]<<16) | (ipv[2]<<8) | (ipv[3])); |
705 | } |
706 | |
707 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
708 | pai->dgram, pai->dglen, dmstart, |
709 | adns_r_addr, adns_qf_quoteok_query); |
710 | if (st) return st; |
711 | |
712 | ctx.ext= 0; |
713 | ctx.callback= icb_ptr; |
714 | memset(&ctx.info,0,sizeof(ctx.info)); |
715 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
716 | &pai->qu->vb, id, |
660d7d3b |
717 | adns_qf_quoteok_query, pai->now, &ctx); |
a6536d8b |
718 | if (st) return st; |
719 | |
720 | nqu->parent= pai->qu; |
721 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); |
722 | |
723 | return adns_s_ok; |
724 | } |
725 | |
726 | /* |
9ec44266 |
727 | * _strpair (mf,cs) |
728 | */ |
729 | |
730 | static void mf_strpair(adns_query qu, void *datap) { |
731 | adns_rr_strpair *rrp= datap; |
732 | |
733 | adns__makefinal_str(qu,&rrp->array[0]); |
734 | adns__makefinal_str(qu,&rrp->array[1]); |
735 | } |
736 | |
737 | static adns_status cs_strpair(vbuf *vb, const void *datap) { |
738 | const adns_rr_strpair *rrp= datap; |
739 | adns_status st; |
740 | |
741 | st= csp_qstring(vb,rrp->array[0]); if (st) return st; |
742 | CSP_ADDSTR(" "); |
743 | st= csp_qstring(vb,rrp->array[1]); if (st) return st; |
744 | |
745 | return adns_s_ok; |
746 | } |
747 | |
748 | /* |
749 | * _intstrpair (mf,cs) |
750 | */ |
751 | |
752 | static void mf_intstrpair(adns_query qu, void *datap) { |
753 | adns_rr_intstrpair *rrp= datap; |
754 | |
755 | adns__makefinal_str(qu,&rrp->array[0].str); |
756 | adns__makefinal_str(qu,&rrp->array[1].str); |
757 | } |
758 | |
759 | static adns_status cs_intstrpair(vbuf *vb, const void *datap) { |
760 | const adns_rr_intstrpair *rrp= datap; |
761 | adns_status st; |
762 | |
763 | st= csp_intstr(vb,&rrp->array[0]); if (st) return st; |
764 | CSP_ADDSTR(" "); |
765 | st= csp_intstr(vb,&rrp->array[1]); if (st) return st; |
766 | |
767 | return adns_s_ok; |
768 | } |
769 | |
770 | /* |
771 | * _hinfo (pa) |
772 | */ |
773 | |
774 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, int max, void *datap) { |
775 | adns_rr_intstrpair *rrp= datap; |
776 | adns_status st; |
777 | int i; |
778 | |
779 | for (i=0; i<2; i++) { |
780 | st= pap_string(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
781 | if (st) return st; |
782 | } |
783 | |
784 | if (cbyte != max) return adns_s_invaliddata; |
785 | |
786 | return adns_s_ok; |
787 | } |
788 | |
789 | /* |
790 | * _mailbox (pap) |
791 | */ |
792 | |
793 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
794 | char **mb_r) { |
eaa44731 |
795 | int lablen, labstart, i, needquote, c, r, neednorm; |
796 | const unsigned char *p; |
797 | char *str; |
798 | findlabel_state fls; |
799 | adns_status st; |
800 | vbuf *vb; |
801 | |
802 | vb= &pai->qu->vb; |
803 | vb->used= 0; |
804 | adns__findlabel_start(&fls, pai->ads, |
805 | -1, pai->qu, |
806 | pai->dgram, pai->dglen, max, |
807 | *cbyte_io, cbyte_io); |
808 | st= adns__findlabel_next(&fls,&lablen,&labstart); |
809 | if (!lablen) { |
810 | adns__vbuf_appendstr(vb,"<>"); |
811 | goto x_ok; |
812 | } |
813 | |
814 | neednorm= 1; |
815 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) { |
816 | c= *p++; |
817 | if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata; |
818 | if (c == '.' && !neednorm) neednorm= 1; |
819 | else if (strchr("()<>@,;:\\\".[]",c)) needquote++; |
820 | else neednorm= 0; |
821 | } |
822 | |
823 | if (needquote || neednorm) { |
824 | r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM; |
825 | adns__vbuf_appendq(vb,"\"",1); |
826 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) { |
827 | c= *p; |
828 | if (strchr("()<>@,;:\\\".[]",c)) adns__vbuf_appendq(vb,"\\",1); |
829 | adns__vbuf_appendq(vb,p,1); |
830 | } |
831 | adns__vbuf_appendq(vb,"\"",1); |
832 | } else { |
833 | r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM; |
834 | } |
835 | |
836 | r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM; |
837 | |
838 | st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram); |
839 | if (st) return st; |
840 | |
841 | x_ok: |
842 | str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM; |
843 | memcpy(str,vb->buf,vb->used); |
844 | str[vb->used]= 0; |
845 | *mb_r= str; |
846 | return adns_s_ok; |
9ec44266 |
847 | } |
848 | |
849 | /* |
850 | * _rp (pa) |
851 | */ |
852 | |
853 | static adns_status pa_rp(const parseinfo *pai, int cbyte, int max, void *datap) { |
854 | adns_rr_strpair *rrp= datap; |
855 | adns_status st; |
856 | |
857 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); |
858 | if (st) return st; |
859 | |
860 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); |
861 | if (st) return st; |
862 | |
863 | if (cbyte != max) return adns_s_invaliddata; |
864 | return adns_s_ok; |
865 | } |
866 | |
867 | /* |
868 | * _soa (pa,mf,cs) |
869 | */ |
870 | |
871 | static adns_status pa_soa(const parseinfo *pai, int cbyte, int max, void *datap) { |
872 | adns_rr_soa *rrp= datap; |
873 | const byte *dgram= pai->dgram; |
874 | adns_status st; |
875 | int msw, lsw, i; |
876 | |
877 | st= pap_domain(pai, &cbyte, max, &rrp->mname, |
878 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
879 | if (st) return st; |
880 | |
881 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); |
882 | if (st) return st; |
883 | |
884 | if (cbyte+20 != max) return adns_s_invaliddata; |
885 | |
886 | for (i=0; i<5; i++) { |
887 | GET_W(cbyte,msw); |
888 | GET_W(cbyte,lsw); |
889 | (&rrp->serial)[i]= (msw<<16) | lsw; |
890 | } |
891 | |
892 | return adns_s_ok; |
893 | } |
894 | |
895 | static void mf_soa(adns_query qu, void *datap) { |
896 | adns_rr_soa *rrp= datap; |
897 | |
898 | adns__makefinal_str(qu,&rrp->mname); |
899 | adns__makefinal_str(qu,&rrp->rname); |
900 | } |
901 | |
902 | static adns_status cs_soa(vbuf *vb, const void *datap) { |
903 | const adns_rr_soa *rrp= datap; |
904 | char buf[20]; |
905 | int i; |
906 | adns_status st; |
907 | |
908 | st= csp_qstring(vb,rrp->mname); if (st) return st; |
909 | CSP_ADDSTR(" "); |
910 | st= csp_qstring(vb,rrp->rname); if (st) return st; |
911 | |
912 | for (i=0; i<5; i++) { |
913 | sprintf(buf," %lu",(&rrp->serial)[i]); |
914 | CSP_ADDSTR(buf); |
915 | } |
916 | |
917 | return adns_s_ok; |
918 | } |
919 | |
920 | /* |
eb81d633 |
921 | * _flat (mf) |
922 | */ |
923 | |
ffbda80c |
924 | static void mf_flat(adns_query qu, void *data) { } |
925 | |
eb81d633 |
926 | /* |
927 | * Now the table. |
928 | */ |
929 | |
e062dcae |
930 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
86e7b8d9 |
931 | |
ffbda80c |
932 | #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb |
933 | #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb |
98a3f706 |
934 | |
eb81d633 |
935 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer) \ |
936 | { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_##memb, cs_##memb, parser, comparer } |
937 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer) \ |
938 | { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_flat, cs_##memb, parser, comparer } |
98a3f706 |
939 | |
940 | static const typeinfo typeinfos[] = { |
eb81d633 |
941 | /* Must be in ascending order of rrtype ! */ |
942 | /* mem-mgmt code rrt fmt member parser comparer */ |
1dfe95d8 |
943 | |
eb81d633 |
944 | FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr ), |
945 | DEEP_TYPE(ns_raw, "NS", "raw", str, pa_host_raw, 0 ), |
946 | DEEP_TYPE(cname, "CNAME", 0, str, pa_host_raw, 0 ), |
eb81d633 |
947 | DEEP_TYPE(soa_raw, "SOA", "raw", soa, pa_soa, 0 ), |
eb81d633 |
948 | DEEP_TYPE(ptr_raw, "PTR", "raw", str, pa_host_raw, 0 ), |
9ec44266 |
949 | DEEP_TYPE(hinfo, "HINFO", 0, intstrpair, pa_hinfo, 0 ), |
eb81d633 |
950 | DEEP_TYPE(mx_raw, "MX", "raw", intstr, pa_mx_raw, di_mx_raw ), |
951 | DEEP_TYPE(txt, "TXT", 0, manyistr, pa_txt, 0 ), |
eb81d633 |
952 | DEEP_TYPE(rp_raw, "RP", "raw", strpair, pa_rp, 0 ), |
1dfe95d8 |
953 | |
eb81d633 |
954 | FLAT_TYPE(addr, "A", "addr", addr, pa_addr, di_addr ), |
955 | DEEP_TYPE(ns, "NS", "+addr", hostaddr, pa_hostaddr, di_hostaddr ), |
eb81d633 |
956 | DEEP_TYPE(ptr, "PTR","checked", str, pa_ptr, 0 ), |
eb81d633 |
957 | DEEP_TYPE(mx, "MX", "+addr", inthostaddr, pa_mx, di_mx ), |
1dfe95d8 |
958 | |
9ec44266 |
959 | DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0 ), |
960 | DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0 ), |
98a3f706 |
961 | }; |
962 | |
f759e52e |
963 | const typeinfo *adns__findtype(adns_rrtype type) { |
964 | const typeinfo *begin, *end, *mid; |
98a3f706 |
965 | |
966 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
967 | |
968 | while (begin < end) { |
969 | mid= begin + ((end-begin)>>1); |
970 | if (mid->type == type) return mid; |
971 | if (type > mid->type) begin= mid+1; |
972 | else end= mid; |
973 | } |
974 | return 0; |
975 | } |