Commit | Line | Data |
---|---|---|
e576be50 | 1 | /* |
2 | * types.c | |
3 | * - RR-type-specific code, and the machinery to call it | |
4 | */ | |
5 | /* | |
ae8cc977 | 6 | * This file is part of adns, which is |
7 | * Copyright (C) 1997-2000,2003,2006 Ian Jackson | |
8 | * Copyright (C) 1999-2000,2003,2006 Tony Finch | |
9 | * Copyright (C) 1991 Massachusetts Institute of Technology | |
10 | * (See the file INSTALL for full details.) | |
e576be50 | 11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software Foundation, | |
24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | */ | |
98a3f706 | 26 | |
1b644113 | 27 | #include <stdlib.h> |
28 | ||
0f091044 | 29 | #include <sys/types.h> |
71a6ff46 | 30 | #include <sys/socket.h> |
31 | #include <netinet/in.h> | |
86e7b8d9 | 32 | #include <arpa/inet.h> |
33 | ||
98a3f706 | 34 | #include "internal.h" |
35 | ||
609133ee | 36 | #define R_NOMEM return adns_s_nomemory |
37 | #define CSP_ADDSTR(s) do { \ | |
38 | if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \ | |
39 | } while (0) | |
1dfe95d8 | 40 | |
eb81d633 | 41 | /* |
42 | * order of sections: | |
43 | * | |
9ec44266 | 44 | * _string (pap) |
eb81d633 | 45 | * _textdata, _qstring (csp) |
46 | * _str (mf,cs) | |
9ec44266 | 47 | * _intstr (mf,csp,cs) |
eb81d633 | 48 | * _manyistr (mf,cs) |
49 | * _txt (pa) | |
c0ec02b5 MW |
50 | * _inaddr (pa,di,cs +search_sortlist, dip_genaddr) |
51 | * _addr (pa,di,div,csp,cs,gsz | |
52 | * +search_sortlist_sa, dip_sockaddr) | |
382b81f7 MW |
53 | * _domain (pap,csp,cs) |
54 | * _dom_raw (pa) | |
eb81d633 | 55 | * _host_raw (pa) |
382b81f7 MW |
56 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs |
57 | * +pap_findaddrs, icb_hostaddr) | |
eb81d633 | 58 | * _mx_raw (pa,di) |
59 | * _mx (pa,di) | |
60 | * _inthostaddr (mf,cs) | |
382b81f7 | 61 | * _inthost (cs) |
40206a7e | 62 | * _ptr (ckl,pa +icb_ptr) |
382b81f7 MW |
63 | * _strpair (mf) |
64 | * _intstrpair (mf) | |
9ec44266 | 65 | * _hinfo (pa) |
382b81f7 MW |
66 | * _mailbox (pap,csp +pap_mailbox822) |
67 | * _rp (pa,cs) | |
9ec44266 | 68 | * _soa (pa,mf,cs) |
e8e5aeac | 69 | * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
2c6eb096 | 70 | * _byteblock (mf) |
71 | * _opaque (pa,cs) | |
eb81d633 | 72 | * _flat (mf) |
73 | * | |
74 | * within each section: | |
e8e5aeac | 75 | * ckl_* |
eb81d633 | 76 | * pap_* |
77 | * pa_* | |
78 | * dip_* | |
79 | * di_* | |
80 | * mfp_* | |
81 | * mf_* | |
82 | * csp_* | |
83 | * cs_* | |
ef7070af | 84 | * gsz_* |
d24e2a7e | 85 | * postsort_* |
eb81d633 | 86 | */ |
87 | ||
88 | /* | |
b365d68a | 89 | * _qstring (pap,csp) |
eb81d633 | 90 | */ |
91 | ||
b365d68a | 92 | static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max, |
9ec44266 | 93 | int *len_r, char **str_r) { |
94 | /* Neither len_r nor str_r may be null. | |
95 | * End of datagram (overrun) is indicated by returning adns_s_invaliddata; | |
96 | */ | |
97 | const byte *dgram= pai->dgram; | |
98 | int l, cbyte; | |
99 | char *str; | |
100 | ||
101 | cbyte= *cbyte_io; | |
102 | ||
103 | if (cbyte >= max) return adns_s_invaliddata; | |
104 | GET_B(cbyte,l); | |
105 | if (cbyte+l > max) return adns_s_invaliddata; | |
106 | ||
107 | str= adns__alloc_interim(pai->qu, l+1); | |
108 | if (!str) R_NOMEM; | |
109 | ||
110 | str[l]= 0; | |
111 | memcpy(str,dgram+cbyte,l); | |
112 | ||
113 | *len_r= l; | |
114 | *str_r= str; | |
115 | *cbyte_io= cbyte+l; | |
116 | ||
117 | return adns_s_ok; | |
118 | } | |
119 | ||
b365d68a | 120 | static adns_status csp_qstring(vbuf *vb, const char *dp, int len) { |
eb81d633 | 121 | unsigned char ch; |
122 | char buf[10]; | |
123 | int cn; | |
124 | ||
125 | CSP_ADDSTR("\""); | |
126 | for (cn=0; cn<len; cn++) { | |
127 | ch= *dp++; | |
b365d68a | 128 | if (ch == '\\') { |
9ec44266 | 129 | CSP_ADDSTR("\\\\"); |
b365d68a | 130 | } else if (ch == '"') { |
131 | CSP_ADDSTR("\\\""); | |
132 | } else if (ch >= 32 && ch <= 126) { | |
133 | if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM; | |
eb81d633 | 134 | } else { |
9ec44266 | 135 | sprintf(buf,"\\x%02x",ch); |
eb81d633 | 136 | CSP_ADDSTR(buf); |
137 | } | |
138 | } | |
139 | CSP_ADDSTR("\""); | |
140 | ||
141 | return adns_s_ok; | |
142 | } | |
143 | ||
eb81d633 | 144 | /* |
b365d68a | 145 | * _str (mf) |
eb81d633 | 146 | */ |
147 | ||
148 | static void mf_str(adns_query qu, void *datap) { | |
149 | char **rrp= datap; | |
150 | ||
151 | adns__makefinal_str(qu,rrp); | |
152 | } | |
153 | ||
eb81d633 | 154 | /* |
b365d68a | 155 | * _intstr (mf) |
eb81d633 | 156 | */ |
157 | ||
158 | static void mf_intstr(adns_query qu, void *datap) { | |
159 | adns_rr_intstr *rrp= datap; | |
160 | ||
161 | adns__makefinal_str(qu,&rrp->str); | |
162 | } | |
163 | ||
eb81d633 | 164 | /* |
b365d68a | 165 | * _manyistr (mf) |
eb81d633 | 166 | */ |
167 | ||
168 | static void mf_manyistr(adns_query qu, void *datap) { | |
169 | adns_rr_intstr **rrp= datap; | |
170 | adns_rr_intstr *te, *table; | |
171 | void *tablev; | |
172 | int tc; | |
173 | ||
174 | for (tc=0, te= *rrp; te->i >= 0; te++, tc++); | |
175 | tablev= *rrp; | |
176 | adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1)); | |
177 | *rrp= table= tablev; | |
178 | for (te= *rrp; te->i >= 0; te++) | |
179 | adns__makefinal_str(qu,&te->str); | |
180 | } | |
181 | ||
eb81d633 | 182 | /* |
b365d68a | 183 | * _txt (pa,cs) |
eb81d633 | 184 | */ |
185 | ||
609133ee | 186 | static adns_status pa_txt(const parseinfo *pai, int cbyte, |
187 | int max, void *datap) { | |
eb81d633 | 188 | adns_rr_intstr **rrp= datap, *table, *te; |
189 | const byte *dgram= pai->dgram; | |
190 | int ti, tc, l, startbyte; | |
9ec44266 | 191 | adns_status st; |
eb81d633 | 192 | |
193 | startbyte= cbyte; | |
194 | if (cbyte >= max) return adns_s_invaliddata; | |
195 | tc= 0; | |
196 | while (cbyte < max) { | |
197 | GET_B(cbyte,l); | |
198 | cbyte+= l; | |
9ec44266 | 199 | tc++; |
eb81d633 | 200 | } |
b365d68a | 201 | if (cbyte != max || !tc) return adns_s_invaliddata; |
eb81d633 | 202 | |
203 | table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1)); | |
204 | if (!table) R_NOMEM; | |
205 | ||
206 | for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) { | |
b365d68a | 207 | st= pap_qstring(pai, &cbyte, max, &te->i, &te->str); |
9ec44266 | 208 | if (st) return st; |
eb81d633 | 209 | } |
210 | assert(cbyte == max); | |
211 | ||
212 | te->i= -1; | |
213 | te->str= 0; | |
214 | ||
215 | *rrp= table; | |
216 | return adns_s_ok; | |
828d89bd | 217 | } |
218 | ||
b365d68a | 219 | static adns_status cs_txt(vbuf *vb, const void *datap) { |
220 | const adns_rr_intstr *const *rrp= datap; | |
221 | const adns_rr_intstr *current; | |
222 | adns_status st; | |
223 | int spc; | |
224 | ||
225 | for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) { | |
226 | if (spc) CSP_ADDSTR(" "); | |
227 | st= csp_qstring(vb,current->str,current->i); if (st) return st; | |
228 | } | |
229 | return adns_s_ok; | |
230 | } | |
231 | ||
232 | /* | |
233 | * _hinfo (cs) | |
234 | */ | |
235 | ||
236 | static adns_status cs_hinfo(vbuf *vb, const void *datap) { | |
237 | const adns_rr_intstrpair *rrp= datap; | |
238 | adns_status st; | |
239 | ||
240 | st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st; | |
241 | CSP_ADDSTR(" "); | |
242 | st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st; | |
243 | return adns_s_ok; | |
244 | } | |
245 | ||
eb81d633 | 246 | /* |
c0ec02b5 | 247 | * _inaddr (pa,di,cs +search_sortlist, dip_genaddr) |
eb81d633 | 248 | */ |
249 | ||
609133ee | 250 | static adns_status pa_inaddr(const parseinfo *pai, int cbyte, |
251 | int max, void *datap) { | |
e062dcae | 252 | struct in_addr *storeto= datap; |
e7a9ca47 | 253 | |
254 | if (max-cbyte != 4) return adns_s_invaliddata; | |
1dfe95d8 | 255 | memcpy(storeto, pai->dgram + cbyte, 4); |
e7a9ca47 | 256 | return adns_s_ok; |
257 | } | |
258 | ||
c0ec02b5 | 259 | static int search_sortlist(adns_state ads, int af, const void *ad) { |
09957b1c | 260 | const struct sortlist *slp; |
c0ec02b5 | 261 | const struct in_addr *a4; |
09957b1c | 262 | int i; |
263 | ||
c0ec02b5 MW |
264 | assert(af==AF_INET); |
265 | a4= ad; | |
09957b1c | 266 | for (i=0, slp=ads->sortlist; |
609133ee | 267 | i<ads->nsortlist && |
c0ec02b5 MW |
268 | (assert(slp->af==AF_INET), |
269 | !((a4->s_addr & slp->mask.v4.s_addr) == slp->base.v4.s_addr)); | |
09957b1c | 270 | i++, slp++); |
271 | return i; | |
eb81d633 | 272 | } |
273 | ||
c0ec02b5 | 274 | static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) { |
09957b1c | 275 | int ai, bi; |
276 | ||
277 | if (!ads->nsortlist) return 0; | |
278 | ||
c0ec02b5 MW |
279 | ai= search_sortlist(ads,af,a); |
280 | bi= search_sortlist(ads,af,b); | |
09957b1c | 281 | return bi<ai; |
282 | } | |
283 | ||
609133ee | 284 | static int di_inaddr(adns_state ads, |
285 | const void *datap_a, const void *datap_b) { | |
c0ec02b5 | 286 | return dip_genaddr(ads,AF_INET,datap_a,datap_b); |
e062dcae | 287 | } |
288 | ||
289 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { | |
290 | const struct in_addr *rrp= datap, rr= *rrp; | |
86e7b8d9 | 291 | const char *ia; |
292 | ||
e062dcae | 293 | ia= inet_ntoa(rr); assert(ia); |
1dfe95d8 | 294 | CSP_ADDSTR(ia); |
295 | return adns_s_ok; | |
86e7b8d9 | 296 | } |
e7a9ca47 | 297 | |
eb81d633 | 298 | /* |
c0ec02b5 | 299 | * _addr (pa,di,div,csp,cs,gsz +search_sortlist_sa, dip_sockaddr) |
eb81d633 | 300 | */ |
301 | ||
609133ee | 302 | static adns_status pa_addr(const parseinfo *pai, int cbyte, |
303 | int max, void *datap) { | |
551ff40f | 304 | adns_rr_addr *storeto= datap; |
1dfe95d8 | 305 | const byte *dgram= pai->dgram; |
c7836bc9 | 306 | |
828d89bd | 307 | if (max-cbyte != 4) return adns_s_invaliddata; |
308 | storeto->len= sizeof(storeto->addr.inet); | |
309 | memset(&storeto->addr,0,sizeof(storeto->addr.inet)); | |
310 | storeto->addr.inet.sin_family= AF_INET; | |
828d89bd | 311 | memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4); |
312 | return adns_s_ok; | |
313 | } | |
314 | ||
c0ec02b5 MW |
315 | static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) { |
316 | assert(sa->sa_family == AF_INET); | |
317 | return search_sortlist(ads, sa->sa_family, | |
318 | &((const struct sockaddr_in *)sa)->sin_addr); | |
319 | } | |
320 | static int dip_sockaddr(adns_state ads, | |
321 | const struct sockaddr *sa, | |
322 | const struct sockaddr *sb) { | |
323 | if (!ads->sortlist) return 0; | |
324 | return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb); | |
325 | } | |
326 | ||
09957b1c | 327 | static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) { |
551ff40f | 328 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
c0ec02b5 | 329 | return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa); |
828d89bd | 330 | } |
331 | ||
09957b1c | 332 | static int div_addr(void *context, const void *datap_a, const void *datap_b) { |
333 | const adns_state ads= context; | |
334 | ||
335 | return di_addr(ads, datap_a, datap_b); | |
336 | } | |
337 | ||
551ff40f | 338 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
828d89bd | 339 | const char *ia; |
47a6797e | 340 | char buf[30]; |
828d89bd | 341 | |
342 | switch (rrp->addr.inet.sin_family) { | |
343 | case AF_INET: | |
b365d68a | 344 | CSP_ADDSTR("INET "); |
828d89bd | 345 | ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia); |
1dfe95d8 | 346 | CSP_ADDSTR(ia); |
828d89bd | 347 | break; |
348 | default: | |
349 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); | |
1dfe95d8 | 350 | CSP_ADDSTR(buf); |
828d89bd | 351 | break; |
352 | } | |
353 | return adns_s_ok; | |
354 | } | |
355 | ||
1dfe95d8 | 356 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
551ff40f | 357 | const adns_rr_addr *rrp= datap; |
1dfe95d8 | 358 | |
359 | return csp_addr(vb,rrp); | |
360 | } | |
361 | ||
ef7070af MW |
362 | static int gsz_addr(const typeinfo *typei, adns_rrtype type) { |
363 | return type & adns__qtf_bigaddr ? | |
364 | sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only); | |
365 | } | |
366 | ||
eb81d633 | 367 | /* |
b365d68a | 368 | * _domain (pap,csp,cs) |
369 | * _dom_raw (pa) | |
eb81d633 | 370 | */ |
371 | ||
1dfe95d8 | 372 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
373 | char **domain_r, parsedomain_flags flags) { | |
e062dcae | 374 | adns_status st; |
375 | char *dm; | |
376 | ||
1dfe95d8 | 377 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
378 | pai->dgram,pai->dglen, cbyte_io, max); | |
e062dcae | 379 | if (st) return st; |
1dfe95d8 | 380 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
e062dcae | 381 | |
1dfe95d8 | 382 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
383 | if (!dm) R_NOMEM; | |
e062dcae | 384 | |
1dfe95d8 | 385 | dm[pai->qu->vb.used]= 0; |
386 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); | |
e062dcae | 387 | |
388 | *domain_r= dm; | |
389 | return adns_s_ok; | |
390 | } | |
391 | ||
b365d68a | 392 | static adns_status csp_domain(vbuf *vb, const char *domain) { |
393 | CSP_ADDSTR(domain); | |
394 | if (!*domain) CSP_ADDSTR("."); | |
395 | return adns_s_ok; | |
396 | } | |
397 | ||
398 | static adns_status cs_domain(vbuf *vb, const void *datap) { | |
399 | const char *const *domainp= datap; | |
400 | return csp_domain(vb,*domainp); | |
401 | } | |
402 | ||
609133ee | 403 | static adns_status pa_dom_raw(const parseinfo *pai, int cbyte, |
404 | int max, void *datap) { | |
b365d68a | 405 | char **rrp= datap; |
406 | adns_status st; | |
407 | ||
408 | st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok); | |
409 | if (st) return st; | |
410 | ||
411 | if (cbyte != max) return adns_s_invaliddata; | |
412 | return adns_s_ok; | |
413 | } | |
414 | ||
eb81d633 | 415 | /* |
416 | * _host_raw (pa) | |
417 | */ | |
418 | ||
609133ee | 419 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, |
420 | int max, void *datap) { | |
e062dcae | 421 | char **rrp= datap; |
ffbda80c | 422 | adns_status st; |
86e7b8d9 | 423 | |
1dfe95d8 | 424 | st= pap_domain(pai, &cbyte, max, rrp, |
425 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
e062dcae | 426 | if (st) return st; |
427 | ||
428 | if (cbyte != max) return adns_s_invaliddata; | |
429 | return adns_s_ok; | |
430 | } | |
ffbda80c | 431 | |
eb81d633 | 432 | /* |
382b81f7 | 433 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr) |
eb81d633 | 434 | */ |
c7836bc9 | 435 | |
1dfe95d8 | 436 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
ef7070af | 437 | size_t addrsz, |
1dfe95d8 | 438 | int *cbyte_io, int count, int dmstart) { |
439 | int rri, naddrs; | |
c7836bc9 | 440 | int type, class, rdlen, rdstart, ownermatched; |
73dba56e | 441 | unsigned long ttl; |
1dfe95d8 | 442 | adns_status st; |
c7836bc9 | 443 | |
1dfe95d8 | 444 | for (rri=0, naddrs=-1; rri<count; rri++) { |
609133ee | 445 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, |
446 | pai->dglen, cbyte_io, | |
73dba56e | 447 | &type, &class, &ttl, &rdlen, &rdstart, |
1dfe95d8 | 448 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
c7836bc9 | 449 | if (st) return st; |
1dfe95d8 | 450 | if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) { |
451 | if (naddrs>0) break; else continue; | |
452 | } | |
453 | if (naddrs == -1) { | |
454 | naddrs= 0; | |
c7836bc9 | 455 | } |
ef7070af | 456 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) |
609133ee | 457 | R_NOMEM; |
73dba56e | 458 | adns__update_expires(pai->qu,ttl,pai->now); |
ef7070af | 459 | st= pa_addr(pai, rdstart,rdstart+rdlen, pai->qu->vb.buf + naddrs*addrsz); |
c7836bc9 | 460 | if (st) return st; |
1dfe95d8 | 461 | naddrs++; |
c7836bc9 | 462 | } |
1dfe95d8 | 463 | if (naddrs >= 0) { |
ef7070af | 464 | ha->addrs= adns__alloc_interim(pai->qu, naddrs*addrsz); |
1dfe95d8 | 465 | if (!ha->addrs) R_NOMEM; |
ef7070af | 466 | memcpy(ha->addrs, pai->qu->vb.buf, naddrs*addrsz); |
1dfe95d8 | 467 | ha->naddrs= naddrs; |
c7836bc9 | 468 | ha->astatus= adns_s_ok; |
1dfe95d8 | 469 | |
ef7070af | 470 | adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf, |
09957b1c | 471 | div_addr, pai->ads); |
c7836bc9 | 472 | } |
473 | return adns_s_ok; | |
474 | } | |
475 | ||
551ff40f | 476 | static void icb_hostaddr(adns_query parent, adns_query child) { |
551ff40f | 477 | adns_answer *cans= child->answer; |
0ea82d76 | 478 | adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr; |
4218fb9a | 479 | adns_state ads= parent->ads; |
b365d68a | 480 | adns_status st; |
ef7070af | 481 | size_t addrsz= gsz_addr(0, parent->answer->type); |
551ff40f | 482 | |
b365d68a | 483 | st= cans->status; |
484 | rrp->astatus= st; | |
485 | rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs; | |
551ff40f | 486 | rrp->addrs= cans->rrs.addr; |
ef7070af | 487 | adns__transfer_interim(child, parent, rrp->addrs, rrp->naddrs*addrsz); |
a6536d8b | 488 | |
4218fb9a | 489 | if (parent->children.head) { |
490 | LIST_LINK_TAIL(ads->childw,parent); | |
491 | } else { | |
492 | adns__query_done(parent); | |
493 | } | |
551ff40f | 494 | } |
495 | ||
1dfe95d8 | 496 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
497 | int max, adns_rr_hostaddr *rrp) { | |
c7836bc9 | 498 | adns_status st; |
499 | int dmstart, cbyte; | |
7da21070 | 500 | qcontext ctx; |
501 | int id; | |
502 | adns_query nqu; | |
4b707d8b | 503 | adns_queryflags nflags; |
ef7070af | 504 | size_t addrsz= gsz_addr(0, pai->qu->answer->type); |
c7836bc9 | 505 | |
506 | dmstart= cbyte= *cbyte_io; | |
1dfe95d8 | 507 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
508 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
c7836bc9 | 509 | if (st) return st; |
510 | *cbyte_io= cbyte; | |
511 | ||
512 | rrp->astatus= adns_s_ok; | |
513 | rrp->naddrs= -1; | |
514 | rrp->addrs= 0; | |
515 | ||
1dfe95d8 | 516 | cbyte= pai->nsstart; |
c7836bc9 | 517 | |
ef7070af | 518 | st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->nscount, dmstart); |
c7836bc9 | 519 | if (st) return st; |
520 | if (rrp->naddrs != -1) return adns_s_ok; | |
521 | ||
ef7070af | 522 | st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->arcount, dmstart); |
c7836bc9 | 523 | if (st) return st; |
524 | if (rrp->naddrs != -1) return adns_s_ok; | |
1dfe95d8 | 525 | |
7da21070 | 526 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
527 | pai->dgram, pai->dglen, dmstart, | |
528 | adns_r_addr, adns_qf_quoteok_query); | |
529 | if (st) return st; | |
551ff40f | 530 | |
a6536d8b | 531 | ctx.ext= 0; |
532 | ctx.callback= icb_hostaddr; | |
0ea82d76 MW |
533 | ctx.pinfo.hostaddr= rrp; |
534 | memset(&ctx.tinfo, 0, sizeof(ctx.tinfo)); | |
4b707d8b | 535 | |
536 | nflags= adns_qf_quoteok_query; | |
537 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; | |
538 | ||
7da21070 | 539 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
c37d270a MW |
540 | ((adns_r_addr & adns_rrt_reprmask) | |
541 | (pai->qu->answer->type & ~adns_rrt_reprmask)), | |
660d7d3b | 542 | &pai->qu->vb, id, nflags, pai->now, &ctx); |
7da21070 | 543 | if (st) return st; |
544 | ||
545 | nqu->parent= pai->qu; | |
546 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); | |
1dfe95d8 | 547 | |
548 | return adns_s_ok; | |
c7836bc9 | 549 | } |
550 | ||
609133ee | 551 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, |
552 | int max, void *datap) { | |
1dfe95d8 | 553 | adns_rr_hostaddr *rrp= datap; |
c7836bc9 | 554 | adns_status st; |
c7836bc9 | 555 | |
1dfe95d8 | 556 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
c7836bc9 | 557 | if (st) return st; |
558 | if (cbyte != max) return adns_s_invaliddata; | |
559 | ||
1dfe95d8 | 560 | return adns_s_ok; |
561 | } | |
c7836bc9 | 562 | |
609133ee | 563 | static int dip_hostaddr(adns_state ads, |
564 | const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { | |
1dfe95d8 | 565 | if (ap->astatus != bp->astatus) return ap->astatus; |
566 | if (ap->astatus) return 0; | |
c7836bc9 | 567 | |
c0ec02b5 | 568 | return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa); |
1dfe95d8 | 569 | } |
570 | ||
609133ee | 571 | static int di_hostaddr(adns_state ads, |
572 | const void *datap_a, const void *datap_b) { | |
1dfe95d8 | 573 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
574 | ||
09957b1c | 575 | return dip_hostaddr(ads, ap,bp); |
c7836bc9 | 576 | } |
577 | ||
eb81d633 | 578 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
579 | void *tablev; | |
ef7070af | 580 | size_t addrsz= gsz_addr(0, qu->answer->type); |
e062dcae | 581 | |
eb81d633 | 582 | adns__makefinal_str(qu,&rrp->host); |
583 | tablev= rrp->addrs; | |
ef7070af | 584 | adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz); |
eb81d633 | 585 | rrp->addrs= tablev; |
e062dcae | 586 | } |
587 | ||
eb81d633 | 588 | static void mf_hostaddr(adns_query qu, void *datap) { |
589 | adns_rr_hostaddr *rrp= datap; | |
e062dcae | 590 | |
eb81d633 | 591 | mfp_hostaddr(qu,rrp); |
e062dcae | 592 | } |
593 | ||
1dfe95d8 | 594 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
a6f1dc92 | 595 | const char *errstr; |
1dfe95d8 | 596 | adns_status st; |
ac77ffc1 | 597 | char buf[20]; |
1dfe95d8 | 598 | int i; |
599 | ||
a6f1dc92 | 600 | st= csp_domain(vb,rrp->host); if (st) return st; |
1dfe95d8 | 601 | |
b365d68a | 602 | CSP_ADDSTR(" "); |
ac77ffc1 | 603 | CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus)); |
604 | ||
605 | sprintf(buf," %d ",rrp->astatus); | |
606 | CSP_ADDSTR(buf); | |
a6f1dc92 | 607 | |
ac77ffc1 | 608 | CSP_ADDSTR(adns_errabbrev(rrp->astatus)); |
a6f1dc92 | 609 | CSP_ADDSTR(" "); |
ac77ffc1 | 610 | |
a6f1dc92 | 611 | errstr= adns_strerror(rrp->astatus); |
612 | st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st; | |
b365d68a | 613 | |
614 | if (rrp->naddrs >= 0) { | |
615 | CSP_ADDSTR(" ("); | |
616 | for (i=0; i<rrp->naddrs; i++) { | |
617 | CSP_ADDSTR(" "); | |
1dfe95d8 | 618 | st= csp_addr(vb,&rrp->addrs[i]); |
619 | } | |
b365d68a | 620 | CSP_ADDSTR(" )"); |
621 | } else { | |
622 | CSP_ADDSTR(" ?"); | |
1dfe95d8 | 623 | } |
624 | return adns_s_ok; | |
625 | } | |
626 | ||
627 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { | |
628 | const adns_rr_hostaddr *rrp= datap; | |
629 | ||
630 | return csp_hostaddr(vb,rrp); | |
631 | } | |
632 | ||
eb81d633 | 633 | /* |
634 | * _mx_raw (pa,di) | |
635 | */ | |
1dfe95d8 | 636 | |
609133ee | 637 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, |
638 | int max, void *datap) { | |
eb81d633 | 639 | const byte *dgram= pai->dgram; |
640 | adns_rr_intstr *rrp= datap; | |
641 | adns_status st; | |
642 | int pref; | |
1dfe95d8 | 643 | |
eb81d633 | 644 | if (cbyte+2 > max) return adns_s_invaliddata; |
645 | GET_W(cbyte,pref); | |
646 | rrp->i= pref; | |
647 | st= pap_domain(pai, &cbyte, max, &rrp->str, | |
648 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
649 | if (st) return st; | |
1dfe95d8 | 650 | |
eb81d633 | 651 | if (cbyte != max) return adns_s_invaliddata; |
652 | return adns_s_ok; | |
653 | } | |
1dfe95d8 | 654 | |
09957b1c | 655 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 656 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
657 | ||
658 | if (ap->i < bp->i) return 0; | |
659 | if (ap->i > bp->i) return 1; | |
660 | return 0; | |
1dfe95d8 | 661 | } |
662 | ||
eb81d633 | 663 | /* |
664 | * _mx (pa,di) | |
665 | */ | |
1dfe95d8 | 666 | |
609133ee | 667 | static adns_status pa_mx(const parseinfo *pai, int cbyte, |
668 | int max, void *datap) { | |
eb81d633 | 669 | const byte *dgram= pai->dgram; |
670 | adns_rr_inthostaddr *rrp= datap; | |
671 | adns_status st; | |
672 | int pref; | |
673 | ||
674 | if (cbyte+2 > max) return adns_s_invaliddata; | |
675 | GET_W(cbyte,pref); | |
676 | rrp->i= pref; | |
677 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); | |
678 | if (st) return st; | |
679 | ||
680 | if (cbyte != max) return adns_s_invaliddata; | |
681 | return adns_s_ok; | |
682 | } | |
683 | ||
09957b1c | 684 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 685 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
686 | ||
687 | if (ap->i < bp->i) return 0; | |
688 | if (ap->i > bp->i) return 1; | |
09957b1c | 689 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
1dfe95d8 | 690 | } |
691 | ||
eb81d633 | 692 | /* |
693 | * _inthostaddr (mf,cs) | |
694 | */ | |
695 | ||
1dfe95d8 | 696 | static void mf_inthostaddr(adns_query qu, void *datap) { |
697 | adns_rr_inthostaddr *rrp= datap; | |
698 | ||
699 | mfp_hostaddr(qu,&rrp->ha); | |
700 | } | |
701 | ||
eb81d633 | 702 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
703 | const adns_rr_inthostaddr *rrp= datap; | |
704 | char buf[10]; | |
e062dcae | 705 | |
eb81d633 | 706 | sprintf(buf,"%u ",rrp->i); |
707 | CSP_ADDSTR(buf); | |
708 | ||
709 | return csp_hostaddr(vb,&rrp->ha); | |
ffbda80c | 710 | } |
711 | ||
eb81d633 | 712 | /* |
b365d68a | 713 | * _inthost (cs) |
714 | */ | |
715 | ||
716 | static adns_status cs_inthost(vbuf *vb, const void *datap) { | |
717 | const adns_rr_intstr *rrp= datap; | |
718 | char buf[10]; | |
719 | ||
720 | sprintf(buf,"%u ",rrp->i); | |
721 | CSP_ADDSTR(buf); | |
722 | return csp_domain(vb,rrp->str); | |
723 | } | |
724 | ||
725 | /* | |
40206a7e | 726 | * _ptr (ckl,pa +icb_ptr) |
a6536d8b | 727 | */ |
728 | ||
40206a7e MW |
729 | static adns_status ckl_ptr(adns_state ads, adns_queryflags flags, |
730 | union checklabel_state *cls, qcontext *ctx, | |
731 | int labnum, const char *label, int lablen) { | |
732 | static const char *const (expectdomain[])= { DNS_INADDR_ARPA }; | |
40206a7e MW |
733 | char *ep; |
734 | const char *ed; | |
735 | char labbuf[4]; | |
736 | int l; | |
737 | ||
738 | if (labnum < 4) { | |
739 | if (lablen<=0 || lablen>3) return adns_s_querydomainwrong; | |
740 | memcpy(labbuf, label, lablen); | |
741 | labbuf[lablen]= 0; | |
742 | cls->ptr.ipv[3-labnum]= strtoul(labbuf,&ep,10); | |
743 | if (*ep) return adns_s_querydomainwrong; | |
744 | if (lablen>1 && *label=='0') return adns_s_querydomainwrong; | |
745 | } else if (labnum < 4 + sizeof(expectdomain)/sizeof(*expectdomain)) { | |
746 | ed= expectdomain[labnum-4]; | |
747 | l= strlen(ed); | |
748 | if (lablen != l || memcmp(label, ed, l)) return adns_s_querydomainwrong; | |
749 | } else { | |
750 | if (lablen) return adns_s_querydomainwrong; | |
c0ec02b5 MW |
751 | ctx->tinfo.ptr.addr.af= AF_INET; |
752 | ctx->tinfo.ptr.addr.addr.v4.s_addr= | |
40206a7e MW |
753 | htonl((cls->ptr.ipv[0]<<24) | (cls->ptr.ipv[1]<<16) | |
754 | (cls->ptr.ipv[2]<< 8) | (cls->ptr.ipv[3])); | |
755 | } | |
756 | return adns_s_ok; | |
757 | } | |
758 | ||
a6536d8b | 759 | static void icb_ptr(adns_query parent, adns_query child) { |
760 | adns_answer *cans= child->answer; | |
c0ec02b5 | 761 | const struct af_addr *queried; |
8de0fa76 | 762 | const unsigned char *found; |
4218fb9a | 763 | adns_state ads= parent->ads; |
a6536d8b | 764 | int i; |
765 | ||
766 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { | |
767 | adns__query_fail(parent,adns_s_inconsistent); | |
768 | return; | |
769 | } else if (cans->status) { | |
770 | adns__query_fail(parent,cans->status); | |
771 | return; | |
772 | } | |
773 | ||
8de0fa76 | 774 | queried= &parent->ctx.tinfo.ptr.addr; |
c0ec02b5 MW |
775 | assert(queried->af == AF_INET); |
776 | assert(cans->type == adns_r_a); | |
8de0fa76 | 777 | for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) { |
c0ec02b5 | 778 | if (queried->addr.v4.s_addr == ((const struct in_addr *)found)->s_addr) { |
4218fb9a | 779 | if (!parent->children.head) { |
780 | adns__query_done(parent); | |
781 | return; | |
782 | } else { | |
783 | LIST_LINK_TAIL(ads->childw,parent); | |
784 | return; | |
785 | } | |
a6536d8b | 786 | } |
787 | } | |
788 | ||
789 | adns__query_fail(parent,adns_s_inconsistent); | |
790 | } | |
791 | ||
609133ee | 792 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, |
793 | int max, void *datap) { | |
a6536d8b | 794 | char **rrp= datap; |
795 | adns_status st; | |
40206a7e | 796 | int cbyte, id; |
a6536d8b | 797 | adns_query nqu; |
798 | qcontext ctx; | |
799 | ||
800 | cbyte= dmstart; | |
801 | st= pap_domain(pai, &cbyte, max, rrp, | |
802 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
803 | if (st) return st; | |
804 | if (cbyte != max) return adns_s_invaliddata; | |
805 | ||
a6536d8b | 806 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
807 | pai->dgram, pai->dglen, dmstart, | |
8de0fa76 | 808 | adns_r_a, adns_qf_quoteok_query); |
a6536d8b | 809 | if (st) return st; |
810 | ||
811 | ctx.ext= 0; | |
812 | ctx.callback= icb_ptr; | |
0ea82d76 MW |
813 | memset(&ctx.pinfo,0,sizeof(ctx.pinfo)); |
814 | memset(&ctx.tinfo,0,sizeof(ctx.tinfo)); | |
8de0fa76 | 815 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_a), |
c37d270a MW |
816 | adns_r_a, &pai->qu->vb, id, adns_qf_quoteok_query, |
817 | pai->now, &ctx); | |
a6536d8b | 818 | if (st) return st; |
819 | ||
820 | nqu->parent= pai->qu; | |
821 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); | |
a6536d8b | 822 | return adns_s_ok; |
823 | } | |
824 | ||
825 | /* | |
b365d68a | 826 | * _strpair (mf) |
9ec44266 | 827 | */ |
828 | ||
829 | static void mf_strpair(adns_query qu, void *datap) { | |
830 | adns_rr_strpair *rrp= datap; | |
831 | ||
832 | adns__makefinal_str(qu,&rrp->array[0]); | |
833 | adns__makefinal_str(qu,&rrp->array[1]); | |
834 | } | |
835 | ||
9ec44266 | 836 | /* |
b365d68a | 837 | * _intstrpair (mf) |
9ec44266 | 838 | */ |
839 | ||
840 | static void mf_intstrpair(adns_query qu, void *datap) { | |
841 | adns_rr_intstrpair *rrp= datap; | |
842 | ||
843 | adns__makefinal_str(qu,&rrp->array[0].str); | |
844 | adns__makefinal_str(qu,&rrp->array[1].str); | |
845 | } | |
846 | ||
9ec44266 | 847 | /* |
848 | * _hinfo (pa) | |
849 | */ | |
850 | ||
609133ee | 851 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, |
852 | int max, void *datap) { | |
9ec44266 | 853 | adns_rr_intstrpair *rrp= datap; |
854 | adns_status st; | |
855 | int i; | |
856 | ||
857 | for (i=0; i<2; i++) { | |
b365d68a | 858 | st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
9ec44266 | 859 | if (st) return st; |
860 | } | |
861 | ||
862 | if (cbyte != max) return adns_s_invaliddata; | |
863 | ||
864 | return adns_s_ok; | |
865 | } | |
866 | ||
867 | /* | |
382b81f7 | 868 | * _mailbox (pap,cs +pap_mailbox822) |
9ec44266 | 869 | */ |
870 | ||
609133ee | 871 | static adns_status pap_mailbox822(const parseinfo *pai, |
872 | int *cbyte_io, int max, char **mb_r) { | |
eaa44731 | 873 | int lablen, labstart, i, needquote, c, r, neednorm; |
874 | const unsigned char *p; | |
875 | char *str; | |
876 | findlabel_state fls; | |
877 | adns_status st; | |
878 | vbuf *vb; | |
879 | ||
880 | vb= &pai->qu->vb; | |
881 | vb->used= 0; | |
882 | adns__findlabel_start(&fls, pai->ads, | |
883 | -1, pai->qu, | |
884 | pai->dgram, pai->dglen, max, | |
885 | *cbyte_io, cbyte_io); | |
886 | st= adns__findlabel_next(&fls,&lablen,&labstart); | |
887 | if (!lablen) { | |
b365d68a | 888 | adns__vbuf_appendstr(vb,"."); |
eaa44731 | 889 | goto x_ok; |
890 | } | |
891 | ||
892 | neednorm= 1; | |
893 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) { | |
894 | c= *p++; | |
895 | if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata; | |
896 | if (c == '.' && !neednorm) neednorm= 1; | |
7672a872 | 897 | else if (c==' ' || c>=127 || ctype_822special(c)) needquote++; |
eaa44731 | 898 | else neednorm= 0; |
899 | } | |
900 | ||
901 | if (needquote || neednorm) { | |
902 | r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM; | |
903 | adns__vbuf_appendq(vb,"\"",1); | |
904 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) { | |
905 | c= *p; | |
b365d68a | 906 | if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1); |
eaa44731 | 907 | adns__vbuf_appendq(vb,p,1); |
908 | } | |
909 | adns__vbuf_appendq(vb,"\"",1); | |
910 | } else { | |
911 | r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM; | |
912 | } | |
913 | ||
914 | r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM; | |
915 | ||
916 | st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram); | |
917 | if (st) return st; | |
918 | ||
919 | x_ok: | |
920 | str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM; | |
921 | memcpy(str,vb->buf,vb->used); | |
922 | str[vb->used]= 0; | |
923 | *mb_r= str; | |
924 | return adns_s_ok; | |
9ec44266 | 925 | } |
926 | ||
9da4a044 | 927 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
928 | char **mb_r) { | |
2c6eb096 | 929 | if (pai->qu->typei->typekey & adns__qtf_mail822) { |
9da4a044 | 930 | return pap_mailbox822(pai, cbyte_io, max, mb_r); |
931 | } else { | |
b365d68a | 932 | return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok); |
9da4a044 | 933 | } |
934 | } | |
935 | ||
b365d68a | 936 | static adns_status csp_mailbox(vbuf *vb, const char *mailbox) { |
937 | return csp_domain(vb,mailbox); | |
938 | } | |
939 | ||
9ec44266 | 940 | /* |
b365d68a | 941 | * _rp (pa,cs) |
9ec44266 | 942 | */ |
943 | ||
609133ee | 944 | static adns_status pa_rp(const parseinfo *pai, int cbyte, |
945 | int max, void *datap) { | |
9ec44266 | 946 | adns_rr_strpair *rrp= datap; |
947 | adns_status st; | |
948 | ||
949 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); | |
950 | if (st) return st; | |
951 | ||
952 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); | |
953 | if (st) return st; | |
954 | ||
955 | if (cbyte != max) return adns_s_invaliddata; | |
956 | return adns_s_ok; | |
957 | } | |
958 | ||
b365d68a | 959 | static adns_status cs_rp(vbuf *vb, const void *datap) { |
960 | const adns_rr_strpair *rrp= datap; | |
961 | adns_status st; | |
962 | ||
963 | st= csp_mailbox(vb,rrp->array[0]); if (st) return st; | |
964 | CSP_ADDSTR(" "); | |
965 | st= csp_domain(vb,rrp->array[1]); if (st) return st; | |
966 | ||
967 | return adns_s_ok; | |
968 | } | |
969 | ||
9ec44266 | 970 | /* |
971 | * _soa (pa,mf,cs) | |
972 | */ | |
973 | ||
609133ee | 974 | static adns_status pa_soa(const parseinfo *pai, int cbyte, |
975 | int max, void *datap) { | |
9ec44266 | 976 | adns_rr_soa *rrp= datap; |
977 | const byte *dgram= pai->dgram; | |
978 | adns_status st; | |
979 | int msw, lsw, i; | |
980 | ||
981 | st= pap_domain(pai, &cbyte, max, &rrp->mname, | |
982 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
983 | if (st) return st; | |
984 | ||
985 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); | |
986 | if (st) return st; | |
987 | ||
988 | if (cbyte+20 != max) return adns_s_invaliddata; | |
989 | ||
990 | for (i=0; i<5; i++) { | |
991 | GET_W(cbyte,msw); | |
992 | GET_W(cbyte,lsw); | |
993 | (&rrp->serial)[i]= (msw<<16) | lsw; | |
994 | } | |
995 | ||
996 | return adns_s_ok; | |
997 | } | |
998 | ||
999 | static void mf_soa(adns_query qu, void *datap) { | |
1000 | adns_rr_soa *rrp= datap; | |
1001 | ||
1002 | adns__makefinal_str(qu,&rrp->mname); | |
1003 | adns__makefinal_str(qu,&rrp->rname); | |
1004 | } | |
1005 | ||
1006 | static adns_status cs_soa(vbuf *vb, const void *datap) { | |
1007 | const adns_rr_soa *rrp= datap; | |
1008 | char buf[20]; | |
1009 | int i; | |
1010 | adns_status st; | |
1011 | ||
b365d68a | 1012 | st= csp_domain(vb,rrp->mname); if (st) return st; |
9ec44266 | 1013 | CSP_ADDSTR(" "); |
b365d68a | 1014 | st= csp_mailbox(vb,rrp->rname); if (st) return st; |
9ec44266 | 1015 | |
1016 | for (i=0; i<5; i++) { | |
1017 | sprintf(buf," %lu",(&rrp->serial)[i]); | |
1018 | CSP_ADDSTR(buf); | |
1019 | } | |
1020 | ||
1021 | return adns_s_ok; | |
1022 | } | |
1023 | ||
1024 | /* | |
e8e5aeac | 1025 | * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
d19b03d0 | 1026 | */ |
1027 | ||
e8e5aeac MW |
1028 | static adns_status ckl_srv(adns_state ads, adns_queryflags flags, |
1029 | union checklabel_state *cls, qcontext *ctx, | |
1030 | int labnum, const char *label, int lablen) { | |
1031 | if (labnum < 2 && !(flags & adns_qf_quoteok_query)) { | |
1032 | if (!lablen || label[0] != '_') return adns_s_querydomaininvalid; | |
1033 | return adns_s_ok; | |
d19b03d0 | 1034 | } |
e8e5aeac | 1035 | return adns__ckl_hostname(ads, flags, cls, ctx, labnum, label, lablen); |
d19b03d0 | 1036 | } |
1037 | ||
05fc6b3a | 1038 | static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max, |
0e45654b | 1039 | adns_rr_srvha *rrp |
1040 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1041 | const byte *dgram= pai->dgram; |
05fc6b3a | 1042 | int ti, cbyte; |
1043 | ||
1044 | cbyte= *cbyte_io; | |
1045 | if ((*cbyte_io += 6) > max) return adns_s_invaliddata; | |
401c256a | 1046 | |
1047 | rrp->priority= GET_W(cbyte, ti); | |
1048 | rrp->weight= GET_W(cbyte, ti); | |
1049 | rrp->port= GET_W(cbyte, ti); | |
1050 | return adns_s_ok; | |
1051 | } | |
1052 | ||
1053 | static adns_status pa_srvraw(const parseinfo *pai, int cbyte, | |
1054 | int max, void *datap) { | |
1055 | adns_rr_srvraw *rrp= datap; | |
1056 | adns_status st; | |
1057 | ||
05fc6b3a | 1058 | st= pap_srv_begin(pai,&cbyte,max,datap); |
401c256a | 1059 | if (st) return st; |
1060 | ||
1061 | st= pap_domain(pai, &cbyte, max, &rrp->host, | |
1062 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1063 | if (st) return st; | |
1064 | ||
1065 | if (cbyte != max) return adns_s_invaliddata; | |
1066 | return adns_s_ok; | |
1067 | } | |
1068 | ||
1069 | static adns_status pa_srvha(const parseinfo *pai, int cbyte, | |
1070 | int max, void *datap) { | |
1071 | adns_rr_srvha *rrp= datap; | |
1072 | adns_status st; | |
1073 | ||
05fc6b3a | 1074 | st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st; |
401c256a | 1075 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st; |
1076 | if (cbyte != max) return adns_s_invaliddata; | |
1077 | return adns_s_ok; | |
1078 | } | |
1079 | ||
1080 | static void mf_srvraw(adns_query qu, void *datap) { | |
1081 | adns_rr_srvraw *rrp= datap; | |
1082 | adns__makefinal_str(qu, &rrp->host); | |
1083 | } | |
1084 | ||
1085 | static void mf_srvha(adns_query qu, void *datap) { | |
1086 | adns_rr_srvha *rrp= datap; | |
1087 | mfp_hostaddr(qu,&rrp->ha); | |
1088 | } | |
1089 | ||
1090 | static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) { | |
1091 | const adns_rr_srvraw *ap= datap_a, *bp= datap_b; | |
1092 | /* might be const adns_rr_svhostaddr* */ | |
1093 | ||
1094 | if (ap->priority < bp->priority) return 0; | |
1095 | if (ap->priority > bp->priority) return 1; | |
1096 | return 0; | |
1097 | } | |
1098 | ||
0e45654b | 1099 | static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp |
1100 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1101 | char buf[30]; |
1102 | sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port); | |
1103 | CSP_ADDSTR(buf); | |
1104 | return adns_s_ok; | |
1105 | } | |
1106 | ||
1107 | static adns_status cs_srvraw(vbuf *vb, const void *datap) { | |
1108 | const adns_rr_srvraw *rrp= datap; | |
1109 | adns_status st; | |
1110 | ||
0e45654b | 1111 | st= csp_srv_begin(vb,(const void*)rrp); if (st) return st; |
401c256a | 1112 | return csp_domain(vb,rrp->host); |
1113 | } | |
1114 | ||
1115 | static adns_status cs_srvha(vbuf *vb, const void *datap) { | |
1116 | const adns_rr_srvha *rrp= datap; | |
1117 | adns_status st; | |
1118 | ||
0e45654b | 1119 | st= csp_srv_begin(vb,(const void*)datap); if (st) return st; |
401c256a | 1120 | return csp_hostaddr(vb,&rrp->ha); |
1121 | } | |
1122 | ||
b5c41613 | 1123 | static void postsort_srv(adns_state ads, void *array, int nrrs,int rrsz, |
d24e2a7e | 1124 | const struct typeinfo *typei) { |
0e45654b | 1125 | /* we treat everything in the array as if it were an adns_rr_srvha |
1126 | * even though the array might be of adns_rr_srvraw. That's OK | |
1127 | * because they have the same prefix, which is all we access. | |
b5c41613 | 1128 | * We use rrsz, too, rather than naive array indexing, of course. |
0e45654b | 1129 | */ |
1130 | char *workbegin, *workend, *search, *arrayend; | |
1131 | const adns_rr_srvha *rr; | |
1132 | union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp; | |
1133 | int cpriority, totalweight, runtotal; | |
1134 | long randval; | |
1135 | ||
b5c41613 MW |
1136 | assert(rrsz <= sizeof(rrtmp)); |
1137 | for (workbegin= array, arrayend= workbegin + rrsz * nrrs; | |
0e45654b | 1138 | workbegin < arrayend; |
1139 | workbegin= workend) { | |
1140 | cpriority= (rr=(void*)workbegin)->priority; | |
1141 | ||
1142 | for (workend= workbegin, totalweight= 0; | |
1143 | workend < arrayend && (rr=(void*)workend)->priority == cpriority; | |
b5c41613 | 1144 | workend += rrsz) { |
0e45654b | 1145 | totalweight += rr->weight; |
0e45654b | 1146 | } |
1147 | ||
1148 | /* Now workbegin..(workend-1) incl. are exactly all of the RRs of | |
1149 | * cpriority. From now on, workbegin points to the `remaining' | |
1150 | * records: we select one record at a time (RFC2782 `Usage rules' | |
1151 | * and `Format of the SRV RR' subsection `Weight') to place at | |
1152 | * workbegin (swapping with the one that was there, and then | |
1153 | * advance workbegin. */ | |
1154 | for (; | |
b5c41613 MW |
1155 | workbegin + rrsz < workend; /* don't bother if just one */ |
1156 | workbegin += rrsz) { | |
0e45654b | 1157 | |
1158 | randval= nrand48(ads->rand48xsubi); | |
1159 | randval %= (totalweight + 1); | |
0e45654b | 1160 | /* makes it into 0..totalweight inclusive; with 2^10 RRs, |
1161 | * totalweight must be <= 2^26 so probability nonuniformity is | |
1162 | * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie | |
1163 | * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5). | |
1164 | */ | |
1165 | ||
1166 | for (search=workbegin, runtotal=0; | |
1167 | (runtotal += (rr=(void*)search)->weight) < randval; | |
b5c41613 | 1168 | search += rrsz); |
0e45654b | 1169 | assert(search < arrayend); |
1170 | totalweight -= rr->weight; | |
1171 | if (search != workbegin) { | |
b5c41613 MW |
1172 | memcpy(&rrtmp, workbegin, rrsz); |
1173 | memcpy(workbegin, search, rrsz); | |
1174 | memcpy(search, &rrtmp, rrsz); | |
0e45654b | 1175 | } |
1176 | } | |
1177 | } | |
d24e2a7e | 1178 | /* tests: |
1179 | * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk. | |
1180 | * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk. | |
1181 | * ./adnshost_s -t srv- _jabber._tcp.jabber.org | |
1182 | */ | |
1183 | } | |
1184 | ||
d19b03d0 | 1185 | /* |
2c6eb096 | 1186 | * _byteblock (mf) |
1187 | */ | |
1188 | ||
1189 | static void mf_byteblock(adns_query qu, void *datap) { | |
1190 | adns_rr_byteblock *rrp= datap; | |
1191 | void *bytes= rrp->data; | |
1192 | adns__makefinal_block(qu,&bytes,rrp->len); | |
1193 | rrp->data= bytes; | |
1194 | } | |
1195 | ||
1196 | /* | |
1197 | * _opaque (pa,cs) | |
1198 | */ | |
1199 | ||
1200 | static adns_status pa_opaque(const parseinfo *pai, int cbyte, | |
1201 | int max, void *datap) { | |
1202 | adns_rr_byteblock *rrp= datap; | |
1203 | ||
1204 | rrp->len= max - cbyte; | |
1205 | rrp->data= adns__alloc_interim(pai->qu, rrp->len); | |
1206 | if (!rrp->data) R_NOMEM; | |
1207 | memcpy(rrp->data, pai->dgram + cbyte, rrp->len); | |
1208 | return adns_s_ok; | |
1209 | } | |
1210 | ||
1211 | static adns_status cs_opaque(vbuf *vb, const void *datap) { | |
1212 | const adns_rr_byteblock *rrp= datap; | |
1213 | char buf[10]; | |
1214 | int l; | |
1215 | unsigned char *p; | |
1216 | ||
1217 | sprintf(buf,"\\# %d",rrp->len); | |
1218 | CSP_ADDSTR(buf); | |
1219 | ||
1220 | for (l= rrp->len, p= rrp->data; | |
1221 | l>=4; | |
1222 | l -= 4, p += 4) { | |
1223 | sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]); | |
1224 | CSP_ADDSTR(buf); | |
1225 | } | |
1226 | for (; | |
1227 | l>0; | |
1228 | l--, p++) { | |
1229 | sprintf(buf," %02x",*p); | |
1230 | CSP_ADDSTR(buf); | |
1231 | } | |
1232 | return adns_s_ok; | |
1233 | } | |
1234 | ||
1235 | /* | |
eb81d633 | 1236 | * _flat (mf) |
1237 | */ | |
1238 | ||
ffbda80c | 1239 | static void mf_flat(adns_query qu, void *data) { } |
1240 | ||
eb81d633 | 1241 | /* |
1242 | * Now the table. | |
1243 | */ | |
1244 | ||
e062dcae | 1245 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
86e7b8d9 | 1246 | |
c5fd1fbb | 1247 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \ |
129d8038 | 1248 | { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \ |
c5fd1fbb | 1249 | GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \ |
b5c41613 | 1250 | adns__ckl_hostname, 0, adns__getrrsz_default, CDR(__VA_ARGS__) } |
c5fd1fbb | 1251 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \ |
129d8038 | 1252 | { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \ |
c5fd1fbb | 1253 | GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \ |
b5c41613 | 1254 | adns__ckl_hostname, 0, adns__getrrsz_default, CDR(__VA_ARGS__) } |
c5fd1fbb MW |
1255 | |
1256 | #define di_0 0 | |
98a3f706 | 1257 | |
1258 | static const typeinfo typeinfos[] = { | |
eb81d633 | 1259 | /* Must be in ascending order of rrtype ! */ |
609133ee | 1260 | /* mem-mgmt code rrt fmt member parser comparer printer */ |
1261 | ||
c5fd1fbb MW |
1262 | FLAT_TYPE(a, "A", 0, inaddr, inaddr, inaddr,inaddr ), |
1263 | DEEP_TYPE(ns_raw, "NS", "raw",str, host_raw,0, domain ), | |
1264 | DEEP_TYPE(cname, "CNAME", 0, str, dom_raw, 0, domain ), | |
1265 | DEEP_TYPE(soa_raw,"SOA", "raw",soa, soa, 0, soa ), | |
1266 | DEEP_TYPE(ptr_raw,"PTR", "raw",str, host_raw,0, domain ), | |
1267 | DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,hinfo, 0, hinfo ), | |
1268 | DEEP_TYPE(mx_raw, "MX", "raw",intstr, mx_raw, mx_raw,inthost ), | |
1269 | DEEP_TYPE(txt, "TXT", 0, manyistr, txt, 0, txt ), | |
1270 | DEEP_TYPE(rp_raw, "RP", "raw",strpair, rp, 0, rp ), | |
1271 | DEEP_TYPE(srv_raw,"SRV", "raw",srvraw , srvraw, srv, srvraw, | |
e8e5aeac | 1272 | .checklabel= ckl_srv, .postsort= postsort_srv), |
c5fd1fbb | 1273 | |
ef7070af MW |
1274 | FLAT_TYPE(addr, "A", "addr", addr, addr, addr, addr, |
1275 | .getrrsz= gsz_addr), | |
c5fd1fbb | 1276 | DEEP_TYPE(ns, "NS", "+addr",hostaddr, hostaddr,hostaddr,hostaddr ), |
40206a7e MW |
1277 | DEEP_TYPE(ptr, "PTR","checked",str, ptr, 0, domain, |
1278 | .checklabel= ckl_ptr), | |
c5fd1fbb MW |
1279 | DEEP_TYPE(mx, "MX", "+addr",inthostaddr,mx, mx, inthostaddr, ), |
1280 | DEEP_TYPE(srv, "SRV","+addr",srvha, srvha, srv, srvha, | |
e8e5aeac | 1281 | .checklabel= ckl_srv, .postsort= postsort_srv), |
c5fd1fbb MW |
1282 | |
1283 | DEEP_TYPE(soa, "SOA","822", soa, soa, 0, soa ), | |
1284 | DEEP_TYPE(rp, "RP", "822", strpair, rp, 0, rp ), | |
98a3f706 | 1285 | }; |
1286 | ||
2c6eb096 | 1287 | static const typeinfo typeinfo_unknown= |
c5fd1fbb | 1288 | DEEP_TYPE(unknown,0, "unknown",byteblock,opaque, 0, opaque ); |
2c6eb096 | 1289 | |
f759e52e | 1290 | const typeinfo *adns__findtype(adns_rrtype type) { |
1291 | const typeinfo *begin, *end, *mid; | |
98a3f706 | 1292 | |
2c6eb096 | 1293 | if (type & adns_r_unknown) return &typeinfo_unknown; |
129d8038 | 1294 | type &= adns_rrt_reprmask; |
2c6eb096 | 1295 | |
98a3f706 | 1296 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
1297 | ||
1298 | while (begin < end) { | |
1299 | mid= begin + ((end-begin)>>1); | |
2c6eb096 | 1300 | if (mid->typekey == type) return mid; |
1301 | if (type > mid->typekey) begin= mid+1; | |
98a3f706 | 1302 | else end= mid; |
1303 | } | |
1304 | return 0; | |
1305 | } |