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