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; |
1dfe95d8 |
384 | adns_status st; |
c7836bc9 |
385 | |
1dfe95d8 |
386 | for (rri=0, naddrs=-1; rri<count; rri++) { |
387 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, pai->dglen, cbyte_io, |
388 | &type, &class, &rdlen, &rdstart, |
389 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
c7836bc9 |
390 | if (st) return st; |
1dfe95d8 |
391 | if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) { |
392 | if (naddrs>0) break; else continue; |
393 | } |
394 | if (naddrs == -1) { |
395 | naddrs= 0; |
c7836bc9 |
396 | } |
551ff40f |
397 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_rr_addr))) R_NOMEM; |
398 | st= pa_addr(pai, rdstart,rdstart+rdlen, |
399 | pai->qu->vb.buf + naddrs*sizeof(adns_rr_addr)); |
c7836bc9 |
400 | if (st) return st; |
1dfe95d8 |
401 | naddrs++; |
c7836bc9 |
402 | } |
1dfe95d8 |
403 | if (naddrs >= 0) { |
551ff40f |
404 | ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_rr_addr)); |
1dfe95d8 |
405 | if (!ha->addrs) R_NOMEM; |
551ff40f |
406 | memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_rr_addr)); |
1dfe95d8 |
407 | ha->naddrs= naddrs; |
c7836bc9 |
408 | ha->astatus= adns_s_ok; |
1dfe95d8 |
409 | |
09957b1c |
410 | adns__isort(ha->addrs, naddrs, sizeof(adns_rr_addr), pai->qu->vb.buf, |
411 | div_addr, pai->ads); |
c7836bc9 |
412 | } |
413 | return adns_s_ok; |
414 | } |
415 | |
551ff40f |
416 | static void icb_hostaddr(adns_query parent, adns_query child) { |
551ff40f |
417 | adns_answer *cans= child->answer; |
a6536d8b |
418 | adns_rr_hostaddr *rrp= child->ctx.info.hostaddr; |
551ff40f |
419 | |
420 | rrp->astatus= cans->status; |
421 | rrp->naddrs= cans->nrrs; |
422 | rrp->addrs= cans->rrs.addr; |
423 | adns__transfer_interim(child, parent, rrp->addrs, rrp->naddrs*sizeof(adns_rr_addr)); |
a6536d8b |
424 | |
425 | if (!parent->children.head) adns__query_done(parent); |
551ff40f |
426 | } |
427 | |
1dfe95d8 |
428 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
429 | int max, adns_rr_hostaddr *rrp) { |
c7836bc9 |
430 | adns_status st; |
431 | int dmstart, cbyte; |
7da21070 |
432 | qcontext ctx; |
433 | int id; |
434 | adns_query nqu; |
4b707d8b |
435 | adns_queryflags nflags; |
c7836bc9 |
436 | |
437 | dmstart= cbyte= *cbyte_io; |
1dfe95d8 |
438 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
439 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
c7836bc9 |
440 | if (st) return st; |
441 | *cbyte_io= cbyte; |
442 | |
443 | rrp->astatus= adns_s_ok; |
444 | rrp->naddrs= -1; |
445 | rrp->addrs= 0; |
446 | |
1dfe95d8 |
447 | cbyte= pai->nsstart; |
c7836bc9 |
448 | |
1dfe95d8 |
449 | st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart); |
c7836bc9 |
450 | if (st) return st; |
451 | if (rrp->naddrs != -1) return adns_s_ok; |
452 | |
1dfe95d8 |
453 | st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart); |
c7836bc9 |
454 | if (st) return st; |
455 | if (rrp->naddrs != -1) return adns_s_ok; |
1dfe95d8 |
456 | |
7da21070 |
457 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
458 | pai->dgram, pai->dglen, dmstart, |
459 | adns_r_addr, adns_qf_quoteok_query); |
460 | if (st) return st; |
551ff40f |
461 | |
a6536d8b |
462 | ctx.ext= 0; |
463 | ctx.callback= icb_hostaddr; |
464 | ctx.info.hostaddr= rrp; |
4b707d8b |
465 | |
466 | nflags= adns_qf_quoteok_query; |
467 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; |
468 | |
7da21070 |
469 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
4b707d8b |
470 | &pai->qu->vb, id, nflags, pai->now, 0, &ctx); |
7da21070 |
471 | if (st) return st; |
472 | |
473 | nqu->parent= pai->qu; |
474 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); |
1dfe95d8 |
475 | |
476 | return adns_s_ok; |
c7836bc9 |
477 | } |
478 | |
1dfe95d8 |
479 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, int max, void *datap) { |
480 | adns_rr_hostaddr *rrp= datap; |
c7836bc9 |
481 | adns_status st; |
c7836bc9 |
482 | |
1dfe95d8 |
483 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
c7836bc9 |
484 | if (st) return st; |
485 | if (cbyte != max) return adns_s_invaliddata; |
486 | |
1dfe95d8 |
487 | return adns_s_ok; |
488 | } |
c7836bc9 |
489 | |
09957b1c |
490 | static int dip_hostaddr(adns_state ads, const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { |
1dfe95d8 |
491 | if (ap->astatus != bp->astatus) return ap->astatus; |
492 | if (ap->astatus) return 0; |
c7836bc9 |
493 | |
1dfe95d8 |
494 | assert(ap->addrs[0].addr.sa.sa_family == AF_INET); |
495 | assert(bp->addrs[0].addr.sa.sa_family == AF_INET); |
09957b1c |
496 | return dip_inaddr(ads, |
497 | ap->addrs[0].addr.inet.sin_addr, |
498 | bp->addrs[0].addr.inet.sin_addr); |
1dfe95d8 |
499 | } |
500 | |
09957b1c |
501 | static int di_hostaddr(adns_state ads, const void *datap_a, const void *datap_b) { |
1dfe95d8 |
502 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
503 | |
09957b1c |
504 | return dip_hostaddr(ads, ap,bp); |
c7836bc9 |
505 | } |
506 | |
eb81d633 |
507 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
508 | void *tablev; |
e062dcae |
509 | |
eb81d633 |
510 | adns__makefinal_str(qu,&rrp->host); |
511 | tablev= rrp->addrs; |
512 | adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs)); |
513 | rrp->addrs= tablev; |
e062dcae |
514 | } |
515 | |
eb81d633 |
516 | static void mf_hostaddr(adns_query qu, void *datap) { |
517 | adns_rr_hostaddr *rrp= datap; |
e062dcae |
518 | |
eb81d633 |
519 | mfp_hostaddr(qu,rrp); |
e062dcae |
520 | } |
521 | |
1dfe95d8 |
522 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
523 | const char *to_add; |
524 | adns_status st; |
525 | int i; |
526 | |
527 | st= csp_qstring(vb,rrp->host); if (st) return st; |
528 | |
529 | if (rrp->astatus) { |
530 | CSP_ADDSTR(" - "); |
531 | CSP_ADDSTR(adns_strerror(rrp->astatus)); |
532 | } else { |
533 | assert(rrp->naddrs > 0); |
534 | for (i=0, to_add= ": "; i<rrp->naddrs; i++, to_add= ", ") { |
535 | CSP_ADDSTR(to_add); |
536 | st= csp_addr(vb,&rrp->addrs[i]); |
537 | } |
538 | } |
539 | return adns_s_ok; |
540 | } |
541 | |
542 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { |
543 | const adns_rr_hostaddr *rrp= datap; |
544 | |
545 | return csp_hostaddr(vb,rrp); |
546 | } |
547 | |
eb81d633 |
548 | /* |
549 | * _mx_raw (pa,di) |
550 | */ |
1dfe95d8 |
551 | |
eb81d633 |
552 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, int max, void *datap) { |
553 | const byte *dgram= pai->dgram; |
554 | adns_rr_intstr *rrp= datap; |
555 | adns_status st; |
556 | int pref; |
1dfe95d8 |
557 | |
eb81d633 |
558 | if (cbyte+2 > max) return adns_s_invaliddata; |
559 | GET_W(cbyte,pref); |
560 | rrp->i= pref; |
561 | st= pap_domain(pai, &cbyte, max, &rrp->str, |
562 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
563 | if (st) return st; |
1dfe95d8 |
564 | |
eb81d633 |
565 | if (cbyte != max) return adns_s_invaliddata; |
566 | return adns_s_ok; |
567 | } |
1dfe95d8 |
568 | |
09957b1c |
569 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 |
570 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
571 | |
572 | if (ap->i < bp->i) return 0; |
573 | if (ap->i > bp->i) return 1; |
574 | return 0; |
1dfe95d8 |
575 | } |
576 | |
eb81d633 |
577 | /* |
578 | * _mx (pa,di) |
579 | */ |
1dfe95d8 |
580 | |
eb81d633 |
581 | static adns_status pa_mx(const parseinfo *pai, int cbyte, int max, void *datap) { |
582 | const byte *dgram= pai->dgram; |
583 | adns_rr_inthostaddr *rrp= datap; |
584 | adns_status st; |
585 | int pref; |
586 | |
587 | if (cbyte+2 > max) return adns_s_invaliddata; |
588 | GET_W(cbyte,pref); |
589 | rrp->i= pref; |
590 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); |
591 | if (st) return st; |
592 | |
593 | if (cbyte != max) return adns_s_invaliddata; |
594 | return adns_s_ok; |
595 | } |
596 | |
09957b1c |
597 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 |
598 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
599 | |
600 | if (ap->i < bp->i) return 0; |
601 | if (ap->i > bp->i) return 1; |
09957b1c |
602 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
1dfe95d8 |
603 | } |
604 | |
eb81d633 |
605 | /* |
606 | * _inthostaddr (mf,cs) |
607 | */ |
608 | |
1dfe95d8 |
609 | static void mf_inthostaddr(adns_query qu, void *datap) { |
610 | adns_rr_inthostaddr *rrp= datap; |
611 | |
612 | mfp_hostaddr(qu,&rrp->ha); |
613 | } |
614 | |
eb81d633 |
615 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
616 | const adns_rr_inthostaddr *rrp= datap; |
617 | char buf[10]; |
e062dcae |
618 | |
eb81d633 |
619 | sprintf(buf,"%u ",rrp->i); |
620 | CSP_ADDSTR(buf); |
621 | |
622 | return csp_hostaddr(vb,&rrp->ha); |
ffbda80c |
623 | } |
624 | |
eb81d633 |
625 | /* |
a6536d8b |
626 | * _ptr (pa, +icb_ptr) |
627 | */ |
628 | |
629 | static void icb_ptr(adns_query parent, adns_query child) { |
630 | adns_answer *cans= child->answer; |
631 | const adns_rr_addr *queried, *found; |
632 | int i; |
633 | |
634 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { |
635 | adns__query_fail(parent,adns_s_inconsistent); |
636 | return; |
637 | } else if (cans->status) { |
638 | adns__query_fail(parent,cans->status); |
639 | return; |
640 | } |
641 | |
642 | queried= &parent->ctx.info.ptr_parent_addr; |
643 | for (i=0, found=cans->rrs.addr; i<cans->nrrs; i++, found++) { |
644 | if (queried->len == found->len && |
645 | !memcmp(&queried->addr,&found->addr,queried->len)) { |
646 | if (!parent->children.head) adns__query_done(parent); |
647 | return; |
648 | } |
649 | } |
650 | |
651 | adns__query_fail(parent,adns_s_inconsistent); |
652 | } |
653 | |
654 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, int max, void *datap) { |
655 | static const char *(expectdomain[])= { DNS_INADDR_ARPA }; |
656 | |
657 | char **rrp= datap; |
658 | adns_status st; |
659 | adns_rr_addr *ap; |
660 | findlabel_state fls; |
661 | char *ep; |
662 | byte ipv[4]; |
663 | char labbuf[4]; |
664 | int cbyte, i, lablen, labstart, l, id; |
665 | adns_query nqu; |
666 | qcontext ctx; |
667 | |
668 | cbyte= dmstart; |
669 | st= pap_domain(pai, &cbyte, max, rrp, |
670 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
671 | if (st) return st; |
672 | if (cbyte != max) return adns_s_invaliddata; |
673 | |
674 | ap= &pai->qu->ctx.info.ptr_parent_addr; |
675 | if (!ap->len) { |
676 | adns__findlabel_start(&fls, pai->ads, -1, pai->qu, |
677 | pai->qu->query_dgram, pai->qu->query_dglen, |
678 | pai->qu->query_dglen, DNS_HDRSIZE, 0); |
679 | for (i=0; i<4; i++) { |
680 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); |
ea1e31e3 |
681 | if (lablen<=0 || lablen>3) return adns_s_querydomainwrong; |
a6536d8b |
682 | memcpy(labbuf, pai->qu->query_dgram + labstart, lablen); labbuf[lablen]= 0; |
ea1e31e3 |
683 | ipv[3-i]= strtoul(labbuf,&ep,10); if (*ep) return adns_s_querydomainwrong; |
a6536d8b |
684 | if (lablen>1 && pai->qu->query_dgram[labstart]=='0') |
ea1e31e3 |
685 | return adns_s_querydomainwrong; |
a6536d8b |
686 | } |
687 | for (i=0; i<sizeof(expectdomain)/sizeof(*expectdomain); i++) { |
688 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); |
689 | l= strlen(expectdomain[i]); |
690 | if (lablen != l || memcmp(pai->qu->query_dgram + labstart, expectdomain[i], l)) |
ea1e31e3 |
691 | return adns_s_querydomainwrong; |
a6536d8b |
692 | } |
693 | st= adns__findlabel_next(&fls,&lablen,0); assert(!st); |
ea1e31e3 |
694 | if (lablen) return adns_s_querydomainwrong; |
a6536d8b |
695 | |
696 | ap->len= sizeof(struct sockaddr_in); |
697 | memset(&ap->addr,0,sizeof(ap->addr.inet)); |
698 | ap->addr.inet.sin_family= AF_INET; |
699 | ap->addr.inet.sin_addr.s_addr= |
700 | htonl((ipv[0]<<24) | (ipv[1]<<16) | (ipv[2]<<8) | (ipv[3])); |
701 | } |
702 | |
703 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
704 | pai->dgram, pai->dglen, dmstart, |
705 | adns_r_addr, adns_qf_quoteok_query); |
706 | if (st) return st; |
707 | |
708 | ctx.ext= 0; |
709 | ctx.callback= icb_ptr; |
710 | memset(&ctx.info,0,sizeof(ctx.info)); |
711 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
712 | &pai->qu->vb, id, |
713 | adns_qf_quoteok_query, pai->now, 0, &ctx); |
714 | if (st) return st; |
715 | |
716 | nqu->parent= pai->qu; |
717 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); |
718 | |
719 | return adns_s_ok; |
720 | } |
721 | |
722 | /* |
9ec44266 |
723 | * _strpair (mf,cs) |
724 | */ |
725 | |
726 | static void mf_strpair(adns_query qu, void *datap) { |
727 | adns_rr_strpair *rrp= datap; |
728 | |
729 | adns__makefinal_str(qu,&rrp->array[0]); |
730 | adns__makefinal_str(qu,&rrp->array[1]); |
731 | } |
732 | |
733 | static adns_status cs_strpair(vbuf *vb, const void *datap) { |
734 | const adns_rr_strpair *rrp= datap; |
735 | adns_status st; |
736 | |
737 | st= csp_qstring(vb,rrp->array[0]); if (st) return st; |
738 | CSP_ADDSTR(" "); |
739 | st= csp_qstring(vb,rrp->array[1]); if (st) return st; |
740 | |
741 | return adns_s_ok; |
742 | } |
743 | |
744 | /* |
745 | * _intstrpair (mf,cs) |
746 | */ |
747 | |
748 | static void mf_intstrpair(adns_query qu, void *datap) { |
749 | adns_rr_intstrpair *rrp= datap; |
750 | |
751 | adns__makefinal_str(qu,&rrp->array[0].str); |
752 | adns__makefinal_str(qu,&rrp->array[1].str); |
753 | } |
754 | |
755 | static adns_status cs_intstrpair(vbuf *vb, const void *datap) { |
756 | const adns_rr_intstrpair *rrp= datap; |
757 | adns_status st; |
758 | |
759 | st= csp_intstr(vb,&rrp->array[0]); if (st) return st; |
760 | CSP_ADDSTR(" "); |
761 | st= csp_intstr(vb,&rrp->array[1]); if (st) return st; |
762 | |
763 | return adns_s_ok; |
764 | } |
765 | |
766 | /* |
767 | * _hinfo (pa) |
768 | */ |
769 | |
770 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, int max, void *datap) { |
771 | adns_rr_intstrpair *rrp= datap; |
772 | adns_status st; |
773 | int i; |
774 | |
775 | for (i=0; i<2; i++) { |
776 | st= pap_string(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
777 | if (st) return st; |
778 | } |
779 | |
780 | if (cbyte != max) return adns_s_invaliddata; |
781 | |
782 | return adns_s_ok; |
783 | } |
784 | |
785 | /* |
786 | * _mailbox (pap) |
787 | */ |
788 | |
789 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
790 | char **mb_r) { |
791 | return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok); |
792 | /* fixme: mailbox quoting */ |
793 | } |
794 | |
795 | /* |
796 | * _rp (pa) |
797 | */ |
798 | |
799 | static adns_status pa_rp(const parseinfo *pai, int cbyte, int max, void *datap) { |
800 | adns_rr_strpair *rrp= datap; |
801 | adns_status st; |
802 | |
803 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); |
804 | if (st) return st; |
805 | |
806 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); |
807 | if (st) return st; |
808 | |
809 | if (cbyte != max) return adns_s_invaliddata; |
810 | return adns_s_ok; |
811 | } |
812 | |
813 | /* |
814 | * _soa (pa,mf,cs) |
815 | */ |
816 | |
817 | static adns_status pa_soa(const parseinfo *pai, int cbyte, int max, void *datap) { |
818 | adns_rr_soa *rrp= datap; |
819 | const byte *dgram= pai->dgram; |
820 | adns_status st; |
821 | int msw, lsw, i; |
822 | |
823 | st= pap_domain(pai, &cbyte, max, &rrp->mname, |
824 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
825 | if (st) return st; |
826 | |
827 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); |
828 | if (st) return st; |
829 | |
830 | if (cbyte+20 != max) return adns_s_invaliddata; |
831 | |
832 | for (i=0; i<5; i++) { |
833 | GET_W(cbyte,msw); |
834 | GET_W(cbyte,lsw); |
835 | (&rrp->serial)[i]= (msw<<16) | lsw; |
836 | } |
837 | |
838 | return adns_s_ok; |
839 | } |
840 | |
841 | static void mf_soa(adns_query qu, void *datap) { |
842 | adns_rr_soa *rrp= datap; |
843 | |
844 | adns__makefinal_str(qu,&rrp->mname); |
845 | adns__makefinal_str(qu,&rrp->rname); |
846 | } |
847 | |
848 | static adns_status cs_soa(vbuf *vb, const void *datap) { |
849 | const adns_rr_soa *rrp= datap; |
850 | char buf[20]; |
851 | int i; |
852 | adns_status st; |
853 | |
854 | st= csp_qstring(vb,rrp->mname); if (st) return st; |
855 | CSP_ADDSTR(" "); |
856 | st= csp_qstring(vb,rrp->rname); if (st) return st; |
857 | |
858 | for (i=0; i<5; i++) { |
859 | sprintf(buf," %lu",(&rrp->serial)[i]); |
860 | CSP_ADDSTR(buf); |
861 | } |
862 | |
863 | return adns_s_ok; |
864 | } |
865 | |
866 | /* |
eb81d633 |
867 | * _flat (mf) |
868 | */ |
869 | |
ffbda80c |
870 | static void mf_flat(adns_query qu, void *data) { } |
871 | |
eb81d633 |
872 | /* |
873 | * Now the table. |
874 | */ |
875 | |
e062dcae |
876 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
86e7b8d9 |
877 | |
ffbda80c |
878 | #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb |
879 | #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb |
98a3f706 |
880 | |
eb81d633 |
881 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer) \ |
882 | { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_##memb, cs_##memb, parser, comparer } |
883 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer) \ |
884 | { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_flat, cs_##memb, parser, comparer } |
98a3f706 |
885 | |
886 | static const typeinfo typeinfos[] = { |
eb81d633 |
887 | /* Must be in ascending order of rrtype ! */ |
888 | /* mem-mgmt code rrt fmt member parser comparer */ |
1dfe95d8 |
889 | |
eb81d633 |
890 | FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr ), |
891 | DEEP_TYPE(ns_raw, "NS", "raw", str, pa_host_raw, 0 ), |
892 | DEEP_TYPE(cname, "CNAME", 0, str, pa_host_raw, 0 ), |
eb81d633 |
893 | DEEP_TYPE(soa_raw, "SOA", "raw", soa, pa_soa, 0 ), |
eb81d633 |
894 | DEEP_TYPE(ptr_raw, "PTR", "raw", str, pa_host_raw, 0 ), |
9ec44266 |
895 | DEEP_TYPE(hinfo, "HINFO", 0, intstrpair, pa_hinfo, 0 ), |
eb81d633 |
896 | DEEP_TYPE(mx_raw, "MX", "raw", intstr, pa_mx_raw, di_mx_raw ), |
897 | DEEP_TYPE(txt, "TXT", 0, manyistr, pa_txt, 0 ), |
eb81d633 |
898 | DEEP_TYPE(rp_raw, "RP", "raw", strpair, pa_rp, 0 ), |
1dfe95d8 |
899 | |
eb81d633 |
900 | FLAT_TYPE(addr, "A", "addr", addr, pa_addr, di_addr ), |
901 | DEEP_TYPE(ns, "NS", "+addr", hostaddr, pa_hostaddr, di_hostaddr ), |
eb81d633 |
902 | DEEP_TYPE(ptr, "PTR","checked", str, pa_ptr, 0 ), |
eb81d633 |
903 | DEEP_TYPE(mx, "MX", "+addr", inthostaddr, pa_mx, di_mx ), |
1dfe95d8 |
904 | |
9ec44266 |
905 | DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0 ), |
906 | DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0 ), |
98a3f706 |
907 | }; |
908 | |
f759e52e |
909 | const typeinfo *adns__findtype(adns_rrtype type) { |
910 | const typeinfo *begin, *end, *mid; |
98a3f706 |
911 | |
912 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
913 | |
914 | while (begin < end) { |
915 | mid= begin + ((end-begin)>>1); |
916 | if (mid->type == type) return mid; |
917 | if (type > mid->type) begin= mid+1; |
918 | else end= mid; |
919 | } |
920 | return 0; |
921 | } |