e576be50 |
1 | /* |
2 | * types.c |
3 | * - RR-type-specific code, and the machinery to call it |
4 | */ |
5 | /* |
6 | * This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson |
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 | |
1dfe95d8 |
30 | #define R_NOMEM return adns_s_nolocalmem |
31 | #define CSP_ADDSTR(s) if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; else; |
32 | |
eb81d633 |
33 | /* |
34 | * order of sections: |
35 | * |
36 | * _textdata, _qstring (csp) |
37 | * _str (mf,cs) |
38 | * _intstr (mf,cs) |
39 | * _manyistr (mf,cs) |
40 | * _txt (pa) |
41 | * _inaddr (pa,dip,di) |
42 | * _addr (pa,di,csp,cs) |
43 | * _domain (pap) |
44 | * _host_raw (pa) |
45 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs) |
46 | * _mx_raw (pa,di) |
47 | * _mx (pa,di) |
48 | * _inthostaddr (mf,cs) |
a6536d8b |
49 | * _ptr (pa) |
eb81d633 |
50 | * _flat (mf) |
51 | * |
52 | * within each section: |
53 | * pap_* |
54 | * pa_* |
55 | * dip_* |
56 | * di_* |
57 | * mfp_* |
58 | * mf_* |
59 | * csp_* |
60 | * cs_* |
61 | */ |
62 | |
63 | /* |
64 | * _textdata, _qstring (csp) |
65 | */ |
66 | |
67 | static adns_status csp_textdata(vbuf *vb, const char *dp, int len) { |
68 | unsigned char ch; |
69 | char buf[10]; |
70 | int cn; |
71 | |
72 | CSP_ADDSTR("\""); |
73 | for (cn=0; cn<len; cn++) { |
74 | ch= *dp++; |
75 | if (ch >= 32 && ch <= 126 && ch != '"' && ch != '\\') { |
76 | if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM; |
77 | } else { |
78 | sprintf(buf,"\\%02x",ch); |
79 | CSP_ADDSTR(buf); |
80 | } |
81 | } |
82 | CSP_ADDSTR("\""); |
83 | |
84 | return adns_s_ok; |
85 | } |
86 | |
87 | static adns_status csp_qstring(vbuf *vb, const char *dp) { |
88 | return csp_textdata(vb, dp, strlen(dp)); |
89 | } |
90 | |
91 | /* |
92 | * _str (mf,cs) |
93 | */ |
94 | |
95 | static void mf_str(adns_query qu, void *datap) { |
96 | char **rrp= datap; |
97 | |
98 | adns__makefinal_str(qu,rrp); |
99 | } |
100 | |
101 | static adns_status cs_str(vbuf *vb, const void *datap) { |
102 | const char *const *rrp= datap; |
103 | |
104 | return csp_qstring(vb,*rrp); |
105 | } |
106 | |
107 | /* |
108 | * _intstr (mf,cs) |
109 | */ |
110 | |
111 | static void mf_intstr(adns_query qu, void *datap) { |
112 | adns_rr_intstr *rrp= datap; |
113 | |
114 | adns__makefinal_str(qu,&rrp->str); |
115 | } |
116 | |
117 | static adns_status cs_intstr(vbuf *vb, const void *datap) { |
118 | const adns_rr_intstr *rrp= datap; |
119 | char buf[10]; |
120 | |
121 | sprintf(buf,"%u ",rrp->i); |
122 | CSP_ADDSTR(buf); |
123 | return csp_qstring(vb,rrp->str); |
124 | } |
125 | |
126 | /* |
127 | * _manyistr (mf,cs) |
128 | */ |
129 | |
130 | static void mf_manyistr(adns_query qu, void *datap) { |
131 | adns_rr_intstr **rrp= datap; |
132 | adns_rr_intstr *te, *table; |
133 | void *tablev; |
134 | int tc; |
135 | |
136 | for (tc=0, te= *rrp; te->i >= 0; te++, tc++); |
137 | tablev= *rrp; |
138 | adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1)); |
139 | *rrp= table= tablev; |
140 | for (te= *rrp; te->i >= 0; te++) |
141 | adns__makefinal_str(qu,&te->str); |
142 | } |
143 | |
144 | static adns_status cs_manyistr(vbuf *vb, const void *datap) { |
145 | const adns_rr_intstr *const *rrp= datap; |
146 | const adns_rr_intstr *current; |
147 | adns_status st; |
148 | int spc; |
149 | |
150 | for (spc=0, current= *rrp; current->i >= 0; current++) { |
151 | if (spc) CSP_ADDSTR(" "); |
152 | st= csp_textdata(vb,current->str,current->i); if (st) return st; |
153 | } |
154 | return adns_s_ok; |
155 | } |
156 | |
157 | /* |
158 | * _txt (pa) |
159 | */ |
160 | |
161 | static adns_status pa_txt(const parseinfo *pai, int cbyte, int max, void *datap) { |
162 | adns_rr_intstr **rrp= datap, *table, *te; |
163 | const byte *dgram= pai->dgram; |
164 | int ti, tc, l, startbyte; |
165 | |
166 | startbyte= cbyte; |
167 | if (cbyte >= max) return adns_s_invaliddata; |
168 | tc= 0; |
169 | while (cbyte < max) { |
170 | GET_B(cbyte,l); |
171 | cbyte+= l; |
172 | } |
173 | if (cbyte != max) return adns_s_invaliddata; |
174 | |
175 | table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1)); |
176 | if (!table) R_NOMEM; |
177 | |
178 | for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) { |
179 | GET_B(cbyte,l); |
180 | te->str= adns__alloc_interim(pai->qu, l+1); |
181 | if (!te->str) R_NOMEM; |
182 | te->str[l]= 0; |
183 | memcpy(te->str,dgram+cbyte,l); |
184 | te->i= l; |
185 | } |
186 | assert(cbyte == max); |
187 | |
188 | te->i= -1; |
189 | te->str= 0; |
190 | |
191 | *rrp= table; |
192 | return adns_s_ok; |
828d89bd |
193 | } |
194 | |
eb81d633 |
195 | /* |
196 | * _inaddr (pa,dip,di) |
197 | */ |
198 | |
1dfe95d8 |
199 | static adns_status pa_inaddr(const parseinfo *pai, int cbyte, int max, void *datap) { |
e062dcae |
200 | struct in_addr *storeto= datap; |
e7a9ca47 |
201 | |
202 | if (max-cbyte != 4) return adns_s_invaliddata; |
1dfe95d8 |
203 | memcpy(storeto, pai->dgram + cbyte, 4); |
e7a9ca47 |
204 | return adns_s_ok; |
205 | } |
206 | |
eb81d633 |
207 | static int dip_inaddr(struct in_addr a, struct in_addr b) { |
208 | /* fixme implement sortlist */ |
209 | return 0; |
210 | } |
211 | |
e062dcae |
212 | static int di_inaddr(const void *datap_a, const void *datap_b) { |
213 | const struct in_addr *ap= datap_a, *bp= datap_b; |
214 | |
215 | return dip_inaddr(*ap,*bp); |
216 | } |
217 | |
218 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { |
219 | const struct in_addr *rrp= datap, rr= *rrp; |
86e7b8d9 |
220 | const char *ia; |
221 | |
e062dcae |
222 | ia= inet_ntoa(rr); assert(ia); |
1dfe95d8 |
223 | CSP_ADDSTR(ia); |
224 | return adns_s_ok; |
86e7b8d9 |
225 | } |
e7a9ca47 |
226 | |
eb81d633 |
227 | /* |
228 | * _addr (pa,di,csp,cs) |
229 | */ |
230 | |
1dfe95d8 |
231 | static adns_status pa_addr(const parseinfo *pai, int cbyte, int max, void *datap) { |
551ff40f |
232 | adns_rr_addr *storeto= datap; |
1dfe95d8 |
233 | const byte *dgram= pai->dgram; |
c7836bc9 |
234 | |
828d89bd |
235 | if (max-cbyte != 4) return adns_s_invaliddata; |
236 | storeto->len= sizeof(storeto->addr.inet); |
237 | memset(&storeto->addr,0,sizeof(storeto->addr.inet)); |
238 | storeto->addr.inet.sin_family= AF_INET; |
828d89bd |
239 | memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4); |
240 | return adns_s_ok; |
241 | } |
242 | |
243 | static int di_addr(const void *datap_a, const void *datap_b) { |
551ff40f |
244 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
828d89bd |
245 | |
1dfe95d8 |
246 | assert(ap->addr.sa.sa_family == AF_INET); |
828d89bd |
247 | return dip_inaddr(ap->addr.inet.sin_addr,bp->addr.inet.sin_addr); |
248 | } |
249 | |
551ff40f |
250 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
828d89bd |
251 | const char *ia; |
252 | static char buf[30]; |
253 | |
254 | switch (rrp->addr.inet.sin_family) { |
255 | case AF_INET: |
1dfe95d8 |
256 | CSP_ADDSTR("AF_INET "); |
828d89bd |
257 | ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia); |
1dfe95d8 |
258 | CSP_ADDSTR(ia); |
828d89bd |
259 | break; |
260 | default: |
261 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); |
1dfe95d8 |
262 | CSP_ADDSTR(buf); |
828d89bd |
263 | break; |
264 | } |
265 | return adns_s_ok; |
266 | } |
267 | |
1dfe95d8 |
268 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
551ff40f |
269 | const adns_rr_addr *rrp= datap; |
1dfe95d8 |
270 | |
271 | return csp_addr(vb,rrp); |
272 | } |
273 | |
eb81d633 |
274 | /* |
275 | * _domain (pap) |
276 | */ |
277 | |
1dfe95d8 |
278 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
279 | char **domain_r, parsedomain_flags flags) { |
e062dcae |
280 | adns_status st; |
281 | char *dm; |
282 | |
1dfe95d8 |
283 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
284 | pai->dgram,pai->dglen, cbyte_io, max); |
e062dcae |
285 | if (st) return st; |
1dfe95d8 |
286 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
e062dcae |
287 | |
1dfe95d8 |
288 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
289 | if (!dm) R_NOMEM; |
e062dcae |
290 | |
1dfe95d8 |
291 | dm[pai->qu->vb.used]= 0; |
292 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); |
e062dcae |
293 | |
294 | *domain_r= dm; |
295 | return adns_s_ok; |
296 | } |
297 | |
eb81d633 |
298 | /* |
299 | * _host_raw (pa) |
300 | */ |
301 | |
1dfe95d8 |
302 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, int max, void *datap) { |
e062dcae |
303 | char **rrp= datap; |
ffbda80c |
304 | adns_status st; |
86e7b8d9 |
305 | |
1dfe95d8 |
306 | st= pap_domain(pai, &cbyte, max, rrp, |
307 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
e062dcae |
308 | if (st) return st; |
309 | |
310 | if (cbyte != max) return adns_s_invaliddata; |
311 | return adns_s_ok; |
312 | } |
ffbda80c |
313 | |
eb81d633 |
314 | /* |
551ff40f |
315 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs) |
eb81d633 |
316 | */ |
c7836bc9 |
317 | |
1dfe95d8 |
318 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
319 | int *cbyte_io, int count, int dmstart) { |
320 | int rri, naddrs; |
c7836bc9 |
321 | int type, class, rdlen, rdstart, ownermatched; |
1dfe95d8 |
322 | adns_status st; |
c7836bc9 |
323 | |
1dfe95d8 |
324 | for (rri=0, naddrs=-1; rri<count; rri++) { |
325 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, pai->dglen, cbyte_io, |
326 | &type, &class, &rdlen, &rdstart, |
327 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
c7836bc9 |
328 | if (st) return st; |
1dfe95d8 |
329 | if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) { |
330 | if (naddrs>0) break; else continue; |
331 | } |
332 | if (naddrs == -1) { |
333 | naddrs= 0; |
c7836bc9 |
334 | } |
551ff40f |
335 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_rr_addr))) R_NOMEM; |
336 | st= pa_addr(pai, rdstart,rdstart+rdlen, |
337 | pai->qu->vb.buf + naddrs*sizeof(adns_rr_addr)); |
c7836bc9 |
338 | if (st) return st; |
1dfe95d8 |
339 | naddrs++; |
c7836bc9 |
340 | } |
1dfe95d8 |
341 | if (naddrs >= 0) { |
551ff40f |
342 | ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_rr_addr)); |
1dfe95d8 |
343 | if (!ha->addrs) R_NOMEM; |
551ff40f |
344 | memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_rr_addr)); |
1dfe95d8 |
345 | ha->naddrs= naddrs; |
c7836bc9 |
346 | ha->astatus= adns_s_ok; |
1dfe95d8 |
347 | |
551ff40f |
348 | adns__isort(ha->addrs, naddrs, sizeof(adns_rr_addr), pai->qu->vb.buf, di_addr); |
c7836bc9 |
349 | } |
350 | return adns_s_ok; |
351 | } |
352 | |
551ff40f |
353 | static void icb_hostaddr(adns_query parent, adns_query child) { |
551ff40f |
354 | adns_answer *cans= child->answer; |
a6536d8b |
355 | adns_rr_hostaddr *rrp= child->ctx.info.hostaddr; |
551ff40f |
356 | |
357 | rrp->astatus= cans->status; |
358 | rrp->naddrs= cans->nrrs; |
359 | rrp->addrs= cans->rrs.addr; |
360 | adns__transfer_interim(child, parent, rrp->addrs, rrp->naddrs*sizeof(adns_rr_addr)); |
a6536d8b |
361 | |
362 | if (!parent->children.head) adns__query_done(parent); |
551ff40f |
363 | } |
364 | |
1dfe95d8 |
365 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
366 | int max, adns_rr_hostaddr *rrp) { |
c7836bc9 |
367 | adns_status st; |
368 | int dmstart, cbyte; |
7da21070 |
369 | qcontext ctx; |
370 | int id; |
371 | adns_query nqu; |
c7836bc9 |
372 | |
373 | dmstart= cbyte= *cbyte_io; |
1dfe95d8 |
374 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
375 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
c7836bc9 |
376 | if (st) return st; |
377 | *cbyte_io= cbyte; |
378 | |
379 | rrp->astatus= adns_s_ok; |
380 | rrp->naddrs= -1; |
381 | rrp->addrs= 0; |
382 | |
1dfe95d8 |
383 | cbyte= pai->nsstart; |
c7836bc9 |
384 | |
1dfe95d8 |
385 | st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart); |
c7836bc9 |
386 | if (st) return st; |
387 | if (rrp->naddrs != -1) return adns_s_ok; |
388 | |
1dfe95d8 |
389 | st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart); |
c7836bc9 |
390 | if (st) return st; |
391 | if (rrp->naddrs != -1) return adns_s_ok; |
1dfe95d8 |
392 | |
7da21070 |
393 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
394 | pai->dgram, pai->dglen, dmstart, |
395 | adns_r_addr, adns_qf_quoteok_query); |
396 | if (st) return st; |
551ff40f |
397 | |
a6536d8b |
398 | ctx.ext= 0; |
399 | ctx.callback= icb_hostaddr; |
400 | ctx.info.hostaddr= rrp; |
7da21070 |
401 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
402 | &pai->qu->vb, id, |
403 | adns_qf_quoteok_query, pai->now, 0, &ctx); |
404 | if (st) return st; |
405 | |
406 | nqu->parent= pai->qu; |
407 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); |
1dfe95d8 |
408 | |
409 | return adns_s_ok; |
c7836bc9 |
410 | } |
411 | |
1dfe95d8 |
412 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, int max, void *datap) { |
413 | adns_rr_hostaddr *rrp= datap; |
c7836bc9 |
414 | adns_status st; |
c7836bc9 |
415 | |
1dfe95d8 |
416 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
c7836bc9 |
417 | if (st) return st; |
418 | if (cbyte != max) return adns_s_invaliddata; |
419 | |
1dfe95d8 |
420 | return adns_s_ok; |
421 | } |
c7836bc9 |
422 | |
1dfe95d8 |
423 | static int dip_hostaddr(const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { |
424 | if (ap->astatus != bp->astatus) return ap->astatus; |
425 | if (ap->astatus) return 0; |
c7836bc9 |
426 | |
1dfe95d8 |
427 | assert(ap->addrs[0].addr.sa.sa_family == AF_INET); |
428 | assert(bp->addrs[0].addr.sa.sa_family == AF_INET); |
429 | return dip_inaddr(ap->addrs[0].addr.inet.sin_addr, bp->addrs[0].addr.inet.sin_addr); |
430 | } |
431 | |
432 | static int di_hostaddr(const void *datap_a, const void *datap_b) { |
433 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
434 | |
435 | return dip_hostaddr(ap,bp); |
c7836bc9 |
436 | } |
437 | |
eb81d633 |
438 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
439 | void *tablev; |
e062dcae |
440 | |
eb81d633 |
441 | adns__makefinal_str(qu,&rrp->host); |
442 | tablev= rrp->addrs; |
443 | adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs)); |
444 | rrp->addrs= tablev; |
e062dcae |
445 | } |
446 | |
eb81d633 |
447 | static void mf_hostaddr(adns_query qu, void *datap) { |
448 | adns_rr_hostaddr *rrp= datap; |
e062dcae |
449 | |
eb81d633 |
450 | mfp_hostaddr(qu,rrp); |
e062dcae |
451 | } |
452 | |
1dfe95d8 |
453 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
454 | const char *to_add; |
455 | adns_status st; |
456 | int i; |
457 | |
458 | st= csp_qstring(vb,rrp->host); if (st) return st; |
459 | |
460 | if (rrp->astatus) { |
461 | CSP_ADDSTR(" - "); |
462 | CSP_ADDSTR(adns_strerror(rrp->astatus)); |
463 | } else { |
464 | assert(rrp->naddrs > 0); |
465 | for (i=0, to_add= ": "; i<rrp->naddrs; i++, to_add= ", ") { |
466 | CSP_ADDSTR(to_add); |
467 | st= csp_addr(vb,&rrp->addrs[i]); |
468 | } |
469 | } |
470 | return adns_s_ok; |
471 | } |
472 | |
473 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { |
474 | const adns_rr_hostaddr *rrp= datap; |
475 | |
476 | return csp_hostaddr(vb,rrp); |
477 | } |
478 | |
eb81d633 |
479 | /* |
480 | * _mx_raw (pa,di) |
481 | */ |
1dfe95d8 |
482 | |
eb81d633 |
483 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, int max, void *datap) { |
484 | const byte *dgram= pai->dgram; |
485 | adns_rr_intstr *rrp= datap; |
486 | adns_status st; |
487 | int pref; |
1dfe95d8 |
488 | |
eb81d633 |
489 | if (cbyte+2 > max) return adns_s_invaliddata; |
490 | GET_W(cbyte,pref); |
491 | rrp->i= pref; |
492 | st= pap_domain(pai, &cbyte, max, &rrp->str, |
493 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
494 | if (st) return st; |
1dfe95d8 |
495 | |
eb81d633 |
496 | if (cbyte != max) return adns_s_invaliddata; |
497 | return adns_s_ok; |
498 | } |
1dfe95d8 |
499 | |
eb81d633 |
500 | static int di_mx_raw(const void *datap_a, const void *datap_b) { |
501 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
502 | |
503 | if (ap->i < bp->i) return 0; |
504 | if (ap->i > bp->i) return 1; |
505 | return 0; |
1dfe95d8 |
506 | } |
507 | |
eb81d633 |
508 | /* |
509 | * _mx (pa,di) |
510 | */ |
1dfe95d8 |
511 | |
eb81d633 |
512 | static adns_status pa_mx(const parseinfo *pai, int cbyte, int max, void *datap) { |
513 | const byte *dgram= pai->dgram; |
514 | adns_rr_inthostaddr *rrp= datap; |
515 | adns_status st; |
516 | int pref; |
517 | |
518 | if (cbyte+2 > max) return adns_s_invaliddata; |
519 | GET_W(cbyte,pref); |
520 | rrp->i= pref; |
521 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); |
522 | if (st) return st; |
523 | |
524 | if (cbyte != max) return adns_s_invaliddata; |
525 | return adns_s_ok; |
526 | } |
527 | |
528 | static int di_mx(const void *datap_a, const void *datap_b) { |
529 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
530 | |
531 | if (ap->i < bp->i) return 0; |
532 | if (ap->i > bp->i) return 1; |
533 | return dip_hostaddr(&ap->ha,&bp->ha); |
1dfe95d8 |
534 | } |
535 | |
eb81d633 |
536 | /* |
537 | * _inthostaddr (mf,cs) |
538 | */ |
539 | |
1dfe95d8 |
540 | static void mf_inthostaddr(adns_query qu, void *datap) { |
541 | adns_rr_inthostaddr *rrp= datap; |
542 | |
543 | mfp_hostaddr(qu,&rrp->ha); |
544 | } |
545 | |
eb81d633 |
546 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
547 | const adns_rr_inthostaddr *rrp= datap; |
548 | char buf[10]; |
e062dcae |
549 | |
eb81d633 |
550 | sprintf(buf,"%u ",rrp->i); |
551 | CSP_ADDSTR(buf); |
552 | |
553 | return csp_hostaddr(vb,&rrp->ha); |
ffbda80c |
554 | } |
555 | |
eb81d633 |
556 | /* |
a6536d8b |
557 | * _ptr (pa, +icb_ptr) |
558 | */ |
559 | |
560 | static void icb_ptr(adns_query parent, adns_query child) { |
561 | adns_answer *cans= child->answer; |
562 | const adns_rr_addr *queried, *found; |
563 | int i; |
564 | |
565 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { |
566 | adns__query_fail(parent,adns_s_inconsistent); |
567 | return; |
568 | } else if (cans->status) { |
569 | adns__query_fail(parent,cans->status); |
570 | return; |
571 | } |
572 | |
573 | queried= &parent->ctx.info.ptr_parent_addr; |
574 | for (i=0, found=cans->rrs.addr; i<cans->nrrs; i++, found++) { |
575 | if (queried->len == found->len && |
576 | !memcmp(&queried->addr,&found->addr,queried->len)) { |
577 | if (!parent->children.head) adns__query_done(parent); |
578 | return; |
579 | } |
580 | } |
581 | |
582 | adns__query_fail(parent,adns_s_inconsistent); |
583 | } |
584 | |
585 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, int max, void *datap) { |
586 | static const char *(expectdomain[])= { DNS_INADDR_ARPA }; |
587 | |
588 | char **rrp= datap; |
589 | adns_status st; |
590 | adns_rr_addr *ap; |
591 | findlabel_state fls; |
592 | char *ep; |
593 | byte ipv[4]; |
594 | char labbuf[4]; |
595 | int cbyte, i, lablen, labstart, l, id; |
596 | adns_query nqu; |
597 | qcontext ctx; |
598 | |
599 | cbyte= dmstart; |
600 | st= pap_domain(pai, &cbyte, max, rrp, |
601 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
602 | if (st) return st; |
603 | if (cbyte != max) return adns_s_invaliddata; |
604 | |
605 | ap= &pai->qu->ctx.info.ptr_parent_addr; |
606 | if (!ap->len) { |
607 | adns__findlabel_start(&fls, pai->ads, -1, pai->qu, |
608 | pai->qu->query_dgram, pai->qu->query_dglen, |
609 | pai->qu->query_dglen, DNS_HDRSIZE, 0); |
610 | for (i=0; i<4; i++) { |
611 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); |
612 | if (lablen<=0 || lablen>3) return adns_s_invalidquerydomain; |
613 | memcpy(labbuf, pai->qu->query_dgram + labstart, lablen); labbuf[lablen]= 0; |
614 | ipv[3-i]= strtoul(labbuf,&ep,10); if (*ep) return adns_s_invalidquerydomain; |
615 | if (lablen>1 && pai->qu->query_dgram[labstart]=='0') |
616 | return adns_s_invalidquerydomain; |
617 | } |
618 | for (i=0; i<sizeof(expectdomain)/sizeof(*expectdomain); i++) { |
619 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); |
620 | l= strlen(expectdomain[i]); |
621 | if (lablen != l || memcmp(pai->qu->query_dgram + labstart, expectdomain[i], l)) |
622 | return adns_s_invalidquerydomain; |
623 | } |
624 | st= adns__findlabel_next(&fls,&lablen,0); assert(!st); |
625 | if (lablen) return adns_s_invalidquerydomain; |
626 | |
627 | ap->len= sizeof(struct sockaddr_in); |
628 | memset(&ap->addr,0,sizeof(ap->addr.inet)); |
629 | ap->addr.inet.sin_family= AF_INET; |
630 | ap->addr.inet.sin_addr.s_addr= |
631 | htonl((ipv[0]<<24) | (ipv[1]<<16) | (ipv[2]<<8) | (ipv[3])); |
632 | } |
633 | |
634 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
635 | pai->dgram, pai->dglen, dmstart, |
636 | adns_r_addr, adns_qf_quoteok_query); |
637 | if (st) return st; |
638 | |
639 | ctx.ext= 0; |
640 | ctx.callback= icb_ptr; |
641 | memset(&ctx.info,0,sizeof(ctx.info)); |
642 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
643 | &pai->qu->vb, id, |
644 | adns_qf_quoteok_query, pai->now, 0, &ctx); |
645 | if (st) return st; |
646 | |
647 | nqu->parent= pai->qu; |
648 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); |
649 | |
650 | return adns_s_ok; |
651 | } |
652 | |
653 | /* |
eb81d633 |
654 | * _flat (mf) |
655 | */ |
656 | |
ffbda80c |
657 | static void mf_flat(adns_query qu, void *data) { } |
658 | |
eb81d633 |
659 | /* |
660 | * Now the table. |
661 | */ |
662 | |
e062dcae |
663 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
86e7b8d9 |
664 | |
ffbda80c |
665 | #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb |
666 | #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb |
98a3f706 |
667 | |
eb81d633 |
668 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer) \ |
669 | { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_##memb, cs_##memb, parser, comparer } |
670 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer) \ |
671 | { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_flat, cs_##memb, parser, comparer } |
98a3f706 |
672 | |
673 | static const typeinfo typeinfos[] = { |
eb81d633 |
674 | /* Must be in ascending order of rrtype ! */ |
675 | /* mem-mgmt code rrt fmt member parser comparer */ |
1dfe95d8 |
676 | |
eb81d633 |
677 | FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr ), |
678 | DEEP_TYPE(ns_raw, "NS", "raw", str, pa_host_raw, 0 ), |
679 | DEEP_TYPE(cname, "CNAME", 0, str, pa_host_raw, 0 ), |
680 | #if 0 |
681 | DEEP_TYPE(soa_raw, "SOA", "raw", soa, pa_soa, 0 ), |
1dfe95d8 |
682 | #endif |
eb81d633 |
683 | DEEP_TYPE(ptr_raw, "PTR", "raw", str, pa_host_raw, 0 ), |
684 | #if 0 |
685 | DEEP_TYPE(hinfo, "HINFO", 0, strpair, pa_hinfo, 0 ), |
1dfe95d8 |
686 | #endif |
eb81d633 |
687 | DEEP_TYPE(mx_raw, "MX", "raw", intstr, pa_mx_raw, di_mx_raw ), |
688 | DEEP_TYPE(txt, "TXT", 0, manyistr, pa_txt, 0 ), |
689 | #if 0 |
690 | DEEP_TYPE(rp_raw, "RP", "raw", strpair, pa_rp, 0 ), |
1dfe95d8 |
691 | #endif |
692 | |
eb81d633 |
693 | FLAT_TYPE(addr, "A", "addr", addr, pa_addr, di_addr ), |
694 | DEEP_TYPE(ns, "NS", "+addr", hostaddr, pa_hostaddr, di_hostaddr ), |
eb81d633 |
695 | DEEP_TYPE(ptr, "PTR","checked", str, pa_ptr, 0 ), |
eb81d633 |
696 | DEEP_TYPE(mx, "MX", "+addr", inthostaddr, pa_mx, di_mx ), |
1dfe95d8 |
697 | |
eb81d633 |
698 | #if 0 |
699 | DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0 ), |
700 | DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0 ), |
701 | #endif /* fixme - implement all types */ |
98a3f706 |
702 | }; |
703 | |
f759e52e |
704 | const typeinfo *adns__findtype(adns_rrtype type) { |
705 | const typeinfo *begin, *end, *mid; |
98a3f706 |
706 | |
707 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
708 | |
709 | while (begin < end) { |
710 | mid= begin + ((end-begin)>>1); |
711 | if (mid->type == type) return mid; |
712 | if (type > mid->type) begin= mid+1; |
713 | else end= mid; |
714 | } |
715 | return 0; |
716 | } |