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 | |
908dbcfa | 27 | #include <stddef.h> |
1b644113 | 28 | #include <stdlib.h> |
29 | ||
0f091044 | 30 | #include <sys/types.h> |
71a6ff46 | 31 | #include <sys/socket.h> |
32 | #include <netinet/in.h> | |
86e7b8d9 | 33 | #include <arpa/inet.h> |
34 | ||
98a3f706 | 35 | #include "internal.h" |
36 | ||
609133ee | 37 | #define R_NOMEM return adns_s_nomemory |
38 | #define CSP_ADDSTR(s) do { \ | |
39 | if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \ | |
40 | } while (0) | |
1dfe95d8 | 41 | |
eb81d633 | 42 | /* |
43 | * order of sections: | |
44 | * | |
9ec44266 | 45 | * _string (pap) |
eb81d633 | 46 | * _textdata, _qstring (csp) |
47 | * _str (mf,cs) | |
9ec44266 | 48 | * _intstr (mf,csp,cs) |
eb81d633 | 49 | * _manyistr (mf,cs) |
50 | * _txt (pa) | |
b0e8338a MW |
51 | * _inaddr (pa,di,cs |
52 | * +search_sortlist, dip_genaddr, csp_genaddr) | |
50e2b0c3 | 53 | * _in6addr (pa,di,cs) |
908dbcfa | 54 | * _addr (pap,pa,di,div,csp,cs,gsz,qs |
2ca5496d MW |
55 | * +search_sortlist_sa, dip_sockaddr, |
56 | * addr_rrtypes, addr_submit, icb_addr) | |
382b81f7 MW |
57 | * _domain (pap,csp,cs) |
58 | * _dom_raw (pa) | |
eb81d633 | 59 | * _host_raw (pa) |
382b81f7 MW |
60 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs |
61 | * +pap_findaddrs, icb_hostaddr) | |
eb81d633 | 62 | * _mx_raw (pa,di) |
63 | * _mx (pa,di) | |
64 | * _inthostaddr (mf,cs) | |
382b81f7 | 65 | * _inthost (cs) |
938b0228 | 66 | * _ptr (ckl,pa +icb_ptr) |
382b81f7 MW |
67 | * _strpair (mf) |
68 | * _intstrpair (mf) | |
9ec44266 | 69 | * _hinfo (pa) |
382b81f7 MW |
70 | * _mailbox (pap,csp +pap_mailbox822) |
71 | * _rp (pa,cs) | |
9ec44266 | 72 | * _soa (pa,mf,cs) |
e8e5aeac | 73 | * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
2c6eb096 | 74 | * _byteblock (mf) |
75 | * _opaque (pa,cs) | |
eb81d633 | 76 | * _flat (mf) |
77 | * | |
78 | * within each section: | |
e8e5aeac | 79 | * ckl_* |
eb81d633 | 80 | * pap_* |
81 | * pa_* | |
82 | * dip_* | |
83 | * di_* | |
84 | * mfp_* | |
85 | * mf_* | |
86 | * csp_* | |
87 | * cs_* | |
b0a32b17 | 88 | * gsz_* |
d24e2a7e | 89 | * postsort_* |
13826233 | 90 | * qs_* |
eb81d633 | 91 | */ |
92 | ||
93 | /* | |
b365d68a | 94 | * _qstring (pap,csp) |
eb81d633 | 95 | */ |
96 | ||
b365d68a | 97 | static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max, |
9ec44266 | 98 | int *len_r, char **str_r) { |
99 | /* Neither len_r nor str_r may be null. | |
100 | * End of datagram (overrun) is indicated by returning adns_s_invaliddata; | |
101 | */ | |
102 | const byte *dgram= pai->dgram; | |
103 | int l, cbyte; | |
104 | char *str; | |
105 | ||
106 | cbyte= *cbyte_io; | |
107 | ||
108 | if (cbyte >= max) return adns_s_invaliddata; | |
109 | GET_B(cbyte,l); | |
110 | if (cbyte+l > max) return adns_s_invaliddata; | |
111 | ||
112 | str= adns__alloc_interim(pai->qu, l+1); | |
113 | if (!str) R_NOMEM; | |
114 | ||
115 | str[l]= 0; | |
116 | memcpy(str,dgram+cbyte,l); | |
117 | ||
118 | *len_r= l; | |
119 | *str_r= str; | |
120 | *cbyte_io= cbyte+l; | |
121 | ||
122 | return adns_s_ok; | |
123 | } | |
124 | ||
b365d68a | 125 | static adns_status csp_qstring(vbuf *vb, const char *dp, int len) { |
eb81d633 | 126 | unsigned char ch; |
127 | char buf[10]; | |
128 | int cn; | |
129 | ||
130 | CSP_ADDSTR("\""); | |
131 | for (cn=0; cn<len; cn++) { | |
132 | ch= *dp++; | |
b365d68a | 133 | if (ch == '\\') { |
9ec44266 | 134 | CSP_ADDSTR("\\\\"); |
b365d68a | 135 | } else if (ch == '"') { |
136 | CSP_ADDSTR("\\\""); | |
137 | } else if (ch >= 32 && ch <= 126) { | |
138 | if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM; | |
eb81d633 | 139 | } else { |
9ec44266 | 140 | sprintf(buf,"\\x%02x",ch); |
eb81d633 | 141 | CSP_ADDSTR(buf); |
142 | } | |
143 | } | |
144 | CSP_ADDSTR("\""); | |
145 | ||
146 | return adns_s_ok; | |
147 | } | |
148 | ||
eb81d633 | 149 | /* |
b365d68a | 150 | * _str (mf) |
eb81d633 | 151 | */ |
152 | ||
153 | static void mf_str(adns_query qu, void *datap) { | |
154 | char **rrp= datap; | |
155 | ||
156 | adns__makefinal_str(qu,rrp); | |
157 | } | |
158 | ||
eb81d633 | 159 | /* |
b365d68a | 160 | * _intstr (mf) |
eb81d633 | 161 | */ |
162 | ||
163 | static void mf_intstr(adns_query qu, void *datap) { | |
164 | adns_rr_intstr *rrp= datap; | |
165 | ||
166 | adns__makefinal_str(qu,&rrp->str); | |
167 | } | |
168 | ||
eb81d633 | 169 | /* |
b365d68a | 170 | * _manyistr (mf) |
eb81d633 | 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 | ||
eb81d633 | 187 | /* |
b365d68a | 188 | * _txt (pa,cs) |
eb81d633 | 189 | */ |
190 | ||
609133ee | 191 | static adns_status pa_txt(const parseinfo *pai, int cbyte, |
192 | int max, void *datap) { | |
eb81d633 | 193 | adns_rr_intstr **rrp= datap, *table, *te; |
194 | const byte *dgram= pai->dgram; | |
195 | int ti, tc, l, startbyte; | |
9ec44266 | 196 | adns_status st; |
eb81d633 | 197 | |
198 | startbyte= cbyte; | |
199 | if (cbyte >= max) return adns_s_invaliddata; | |
200 | tc= 0; | |
201 | while (cbyte < max) { | |
202 | GET_B(cbyte,l); | |
203 | cbyte+= l; | |
9ec44266 | 204 | tc++; |
eb81d633 | 205 | } |
b365d68a | 206 | if (cbyte != max || !tc) return adns_s_invaliddata; |
eb81d633 | 207 | |
208 | table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1)); | |
209 | if (!table) R_NOMEM; | |
210 | ||
211 | for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) { | |
b365d68a | 212 | st= pap_qstring(pai, &cbyte, max, &te->i, &te->str); |
9ec44266 | 213 | if (st) return st; |
eb81d633 | 214 | } |
215 | assert(cbyte == max); | |
216 | ||
217 | te->i= -1; | |
218 | te->str= 0; | |
219 | ||
220 | *rrp= table; | |
221 | return adns_s_ok; | |
828d89bd | 222 | } |
223 | ||
b365d68a | 224 | static adns_status cs_txt(vbuf *vb, const void *datap) { |
225 | const adns_rr_intstr *const *rrp= datap; | |
226 | const adns_rr_intstr *current; | |
227 | adns_status st; | |
228 | int spc; | |
229 | ||
230 | for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) { | |
231 | if (spc) CSP_ADDSTR(" "); | |
232 | st= csp_qstring(vb,current->str,current->i); if (st) return st; | |
233 | } | |
234 | return adns_s_ok; | |
235 | } | |
236 | ||
237 | /* | |
238 | * _hinfo (cs) | |
239 | */ | |
240 | ||
241 | static adns_status cs_hinfo(vbuf *vb, const void *datap) { | |
242 | const adns_rr_intstrpair *rrp= datap; | |
243 | adns_status st; | |
244 | ||
245 | st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st; | |
246 | CSP_ADDSTR(" "); | |
247 | st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st; | |
248 | return adns_s_ok; | |
249 | } | |
250 | ||
eb81d633 | 251 | /* |
b0e8338a | 252 | * _inaddr (pa,di,cs +search_sortlist, dip_genaddr, csp_genaddr) |
eb81d633 | 253 | */ |
254 | ||
609133ee | 255 | static adns_status pa_inaddr(const parseinfo *pai, int cbyte, |
256 | int max, void *datap) { | |
e062dcae | 257 | struct in_addr *storeto= datap; |
e7a9ca47 | 258 | |
259 | if (max-cbyte != 4) return adns_s_invaliddata; | |
1dfe95d8 | 260 | memcpy(storeto, pai->dgram + cbyte, 4); |
e7a9ca47 | 261 | return adns_s_ok; |
262 | } | |
263 | ||
f930c455 | 264 | static int search_sortlist(adns_state ads, int af, const void *ad) { |
09957b1c | 265 | const struct sortlist *slp; |
82ae109e | 266 | struct in_addr a4; |
09957b1c | 267 | int i; |
477b9c0b MW |
268 | int v6mappedp= 0; |
269 | ||
270 | if (af == AF_INET6) { | |
82ae109e | 271 | const struct in6_addr *a6= ad; |
477b9c0b | 272 | if (IN6_IS_ADDR_V4MAPPED(a6)) { |
82ae109e IJ |
273 | a4.s_addr= htonl(((unsigned long)a6->s6_addr[12] << 24) | |
274 | ((unsigned long)a6->s6_addr[13] << 16) | | |
275 | ((unsigned long)a6->s6_addr[14] << 8) | | |
276 | ((unsigned long)a6->s6_addr[15] << 0)); | |
477b9c0b MW |
277 | v6mappedp= 1; |
278 | } | |
279 | } | |
280 | ||
09957b1c | 281 | for (i=0, slp=ads->sortlist; |
609133ee | 282 | i<ads->nsortlist && |
82ae109e | 283 | !adns__addr_matches(af,ad, &slp->base,&slp->mask) && |
477b9c0b | 284 | !(v6mappedp && |
82ae109e | 285 | adns__addr_matches(AF_INET,&a4, &slp->base,&slp->mask)); |
09957b1c | 286 | i++, slp++); |
287 | return i; | |
eb81d633 | 288 | } |
289 | ||
f930c455 | 290 | static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) { |
09957b1c | 291 | int ai, bi; |
292 | ||
293 | if (!ads->nsortlist) return 0; | |
294 | ||
f930c455 MW |
295 | ai= search_sortlist(ads,af,a); |
296 | bi= search_sortlist(ads,af,b); | |
09957b1c | 297 | return bi<ai; |
298 | } | |
299 | ||
609133ee | 300 | static int di_inaddr(adns_state ads, |
301 | const void *datap_a, const void *datap_b) { | |
f930c455 | 302 | return dip_genaddr(ads,AF_INET,datap_a,datap_b); |
e062dcae | 303 | } |
304 | ||
b0e8338a MW |
305 | static adns_status csp_genaddr(vbuf *vb, int af, const void *p) { |
306 | char buf[ADNS_ADDR2TEXT_BUFLEN]; | |
307 | int len= sizeof(buf); | |
308 | adns_rr_addr a; | |
309 | int err; | |
310 | ||
311 | memset(&a, 0, sizeof(a)); | |
312 | a.addr.sa.sa_family= af; | |
82ae109e | 313 | adns__addr_inject(p, &a.addr); |
b0e8338a MW |
314 | err= adns_addr2text(&a.addr.sa,0, buf,&len, 0); assert(!err); |
315 | CSP_ADDSTR(buf); | |
1dfe95d8 | 316 | return adns_s_ok; |
86e7b8d9 | 317 | } |
e7a9ca47 | 318 | |
b0e8338a MW |
319 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { |
320 | return csp_genaddr(vb, AF_INET,datap); | |
321 | } | |
322 | ||
50e2b0c3 MW |
323 | /* |
324 | * _in6addr (pa,di,cs) | |
325 | */ | |
326 | ||
327 | static adns_status pa_in6addr(const parseinfo *pai, int cbyte, | |
328 | int max, void *datap) { | |
329 | struct in6_addr *storeto= datap; | |
330 | ||
331 | if (max-cbyte != 16) return adns_s_invaliddata; | |
332 | memcpy(storeto->s6_addr, pai->dgram + cbyte, 16); | |
333 | return adns_s_ok; | |
334 | } | |
335 | ||
336 | static int di_in6addr(adns_state ads, | |
337 | const void *datap_a, const void *datap_b) { | |
338 | return dip_genaddr(ads,AF_INET6,datap_a,datap_b); | |
339 | } | |
340 | ||
341 | static adns_status cs_in6addr(vbuf *vb, const void *datap) { | |
342 | return csp_genaddr(vb,AF_INET6,datap); | |
343 | } | |
344 | ||
eb81d633 | 345 | /* |
908dbcfa | 346 | * _addr (pap,pa,di,div,csp,cs,gsz,qs |
2ca5496d MW |
347 | * +search_sortlist_sa, dip_sockaddr, addr_rrtypes, |
348 | * addr_submit, icb_addr) | |
eb81d633 | 349 | */ |
350 | ||
9d138734 MW |
351 | static const typeinfo tinfo_addrsub; |
352 | ||
2ca5496d | 353 | #define ADDR_RRTYPES(_) _(a) _(aaaa) |
9d138734 MW |
354 | |
355 | static const adns_rrtype addr_all_rrtypes[] = { | |
356 | #define RRTY_CODE(ty) adns_r_##ty, | |
357 | ADDR_RRTYPES(RRTY_CODE) | |
358 | #undef RRTY_CODE | |
359 | }; | |
360 | ||
361 | enum { | |
362 | #define RRTY_INDEX(ty) addr__ri_##ty, | |
363 | ADDR_RRTYPES(RRTY_INDEX) | |
364 | #undef RRTY_INDEX | |
365 | addr_nrrtypes, | |
366 | #define RRTY_FLAG(ty) addr_rf_##ty = 1 << addr__ri_##ty, | |
367 | ADDR_RRTYPES(RRTY_FLAG) | |
368 | addr__rrty_hunoz | |
369 | #undef RRTY_FLAG | |
370 | }; | |
371 | ||
372 | static unsigned addr_rrtypeflag(adns_rrtype type) { | |
373 | int i; | |
374 | ||
375 | type &= adns_rrt_typemask; | |
376 | for (i=0; i<addr_nrrtypes && type!=addr_all_rrtypes[i]; i++); | |
377 | return i < addr_nrrtypes ? 1 << i : 0; | |
378 | } | |
379 | ||
1bc731c6 MW |
380 | /* About CNAME handling in addr queries. |
381 | * | |
382 | * A user-level addr query is translated into a number of protocol-level | |
383 | * queries, and its job is to reassemble the results. This gets tricky if | |
384 | * the answers aren't consistent. In particular, if the answers report | |
385 | * inconsistent indirection via CNAME records (e.g., different CNAMEs, or | |
386 | * some indirect via a CNAME, and some don't) then we have trouble. | |
387 | * | |
388 | * Once we've received an answer, even if it was NODATA, we set | |
389 | * adns__qf_addr_answer on the parent query. This will let us detect a | |
390 | * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME. | |
391 | * | |
392 | * If we detect a conflict of any kind, then at least one answer came back | |
393 | * with a CNAME record, so we pick the first such answer (somewhat | |
394 | * arbitrarily) as being the `right' canonical name, and set this in the | |
395 | * parent query's answer->cname slot. We discard address records from the | |
396 | * wrong name. And finally we cancel the outstanding child queries, and | |
397 | * resubmit address queries for the address families we don't yet have, with | |
398 | * adns__qf_addr_cname set so that we know that we're in the fixup state. | |
399 | */ | |
400 | ||
908dbcfa MW |
401 | static adns_status pap_addr(const parseinfo *pai, int rrty, size_t rrsz, |
402 | int *cbyte_io, int max, adns_rr_addr *storeto) { | |
1dfe95d8 | 403 | const byte *dgram= pai->dgram; |
908dbcfa | 404 | int af, addrlen, salen; |
cdf51ff0 | 405 | struct in6_addr v6map; |
908dbcfa MW |
406 | const void *oaddr= dgram + *cbyte_io; |
407 | int avail= max - *cbyte_io; | |
408 | int step= -1; | |
409 | void *addrp= 0; | |
410 | ||
411 | switch (rrty) { | |
412 | case adns_r_a: | |
cdf51ff0 MW |
413 | if ((pai->qu->flags & adns_qf_ipv6_mapv4) && |
414 | (pai->qu->answer->type & adns__qtf_bigaddr)) { | |
415 | if (avail < 4) return adns_s_invaliddata; | |
416 | memset(v6map.s6_addr + 0, 0x00, 10); | |
417 | memset(v6map.s6_addr + 10, 0xff, 2); | |
418 | memcpy(v6map.s6_addr + 12, oaddr, 4); | |
419 | oaddr= v6map.s6_addr; avail= sizeof(v6map.s6_addr); | |
420 | if (step < 0) step= 4; | |
421 | goto aaaa; | |
422 | } | |
908dbcfa MW |
423 | af= AF_INET; addrlen= 4; |
424 | addrp= &storeto->addr.inet.sin_addr; | |
425 | salen= sizeof(storeto->addr.inet); | |
426 | break; | |
cdf51ff0 MW |
427 | case adns_r_aaaa: |
428 | aaaa: | |
429 | af= AF_INET6; addrlen= 16; | |
430 | addrp= storeto->addr.inet6.sin6_addr.s6_addr; | |
431 | salen= sizeof(storeto->addr.inet6); | |
432 | break; | |
908dbcfa MW |
433 | } |
434 | assert(addrp); | |
c7836bc9 | 435 | |
908dbcfa MW |
436 | assert(offsetof(adns_rr_addr, addr) + salen <= rrsz); |
437 | if (addrlen < avail) return adns_s_invaliddata; | |
438 | if (step < 0) step= addrlen; | |
439 | *cbyte_io += step; | |
440 | memset(&storeto->addr, 0, salen); | |
441 | storeto->len= salen; | |
442 | storeto->addr.sa.sa_family= af; | |
443 | memcpy(addrp, oaddr, addrlen); | |
444 | ||
445 | return adns_s_ok; | |
446 | } | |
447 | ||
448 | static adns_status pa_addr(const parseinfo *pai, int cbyte, | |
449 | int max, void *datap) { | |
450 | int err= pap_addr(pai, pai->qu->answer->type & adns_rrt_typemask, | |
451 | pai->qu->answer->rrsz, &cbyte, max, datap); | |
452 | if (err) return err; | |
453 | if (cbyte != max) return adns_s_invaliddata; | |
828d89bd | 454 | return adns_s_ok; |
455 | } | |
456 | ||
f930c455 | 457 | static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) { |
82ae109e IJ |
458 | const void *pa = adns__sockaddr_addr(sa); |
459 | return search_sortlist(ads, sa->sa_family, pa); | |
f930c455 | 460 | } |
07554ccd | 461 | |
f930c455 MW |
462 | static int dip_sockaddr(adns_state ads, |
463 | const struct sockaddr *sa, | |
464 | const struct sockaddr *sb) { | |
465 | if (!ads->sortlist) return 0; | |
466 | return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb); | |
467 | } | |
468 | ||
09957b1c | 469 | static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) { |
551ff40f | 470 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
f930c455 | 471 | return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa); |
828d89bd | 472 | } |
473 | ||
09957b1c | 474 | static int div_addr(void *context, const void *datap_a, const void *datap_b) { |
475 | const adns_state ads= context; | |
476 | ||
477 | return di_addr(ads, datap_a, datap_b); | |
478 | } | |
479 | ||
551ff40f | 480 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
b0e8338a MW |
481 | char buf[ADNS_ADDR2TEXT_BUFLEN]; |
482 | int len= sizeof(buf); | |
483 | int err; | |
828d89bd | 484 | |
485 | switch (rrp->addr.inet.sin_family) { | |
486 | case AF_INET: | |
b365d68a | 487 | CSP_ADDSTR("INET "); |
b0e8338a MW |
488 | goto a2t; |
489 | case AF_INET6: | |
490 | CSP_ADDSTR("INET6 "); | |
491 | goto a2t; | |
492 | a2t: | |
493 | err= adns_addr2text(&rrp->addr.sa,0, buf,&len, 0); assert(!err); | |
494 | CSP_ADDSTR(buf); | |
828d89bd | 495 | break; |
496 | default: | |
497 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); | |
1dfe95d8 | 498 | CSP_ADDSTR(buf); |
828d89bd | 499 | break; |
500 | } | |
501 | return adns_s_ok; | |
502 | } | |
503 | ||
1dfe95d8 | 504 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
551ff40f | 505 | const adns_rr_addr *rrp= datap; |
1dfe95d8 | 506 | |
507 | return csp_addr(vb,rrp); | |
508 | } | |
509 | ||
b0a32b17 MW |
510 | static int gsz_addr(const typeinfo *typei, adns_rrtype type) { |
511 | return type & adns__qtf_bigaddr ? | |
512 | sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only); | |
513 | } | |
514 | ||
9d138734 MW |
515 | static unsigned addr_rrtypes(adns_state ads, adns_rrtype type, |
516 | adns_queryflags qf) { | |
517 | /* Return a mask of addr_rf_... flags indicating which address families are | |
518 | * wanted, given a query type and flags. | |
519 | */ | |
138722f0 MW |
520 | |
521 | adns_queryflags permitaf= 0; | |
522 | unsigned want= 0; | |
523 | ||
524 | if (!(type & adns__qtf_bigaddr)) | |
525 | qf= (qf & ~adns_qf_want_allaf) | adns_qf_want_ipv4; | |
526 | else { | |
527 | if (!(qf & adns_qf_want_allaf)) { | |
528 | qf |= (type & adns__qtf_manyaf) ? | |
529 | adns_qf_want_allaf : adns_qf_want_ipv4; | |
530 | } | |
531 | if (ads->iflags & adns_if_permit_ipv4) permitaf |= adns_qf_want_ipv4; | |
532 | if (ads->iflags & adns_if_permit_ipv6) permitaf |= adns_qf_want_ipv6; | |
533 | if (qf & permitaf) qf &= permitaf | ~adns_qf_want_allaf; | |
534 | } | |
535 | ||
536 | if (qf & adns_qf_want_ipv4) want |= addr_rf_a; | |
537 | if (qf & adns_qf_want_ipv6) want |= addr_rf_aaaa; | |
538 | ||
539 | return want; | |
9d138734 MW |
540 | } |
541 | ||
542 | static void icb_addr(adns_query parent, adns_query child); | |
543 | ||
544 | static void addr_subqueries(adns_query qu, struct timeval now, | |
545 | adns_queryflags qf_extra, | |
546 | const byte *qd_dgram, int qd_dglen) { | |
547 | int i, err, id; | |
548 | adns_query cqu; | |
549 | adns_queryflags qf= (qu->flags & ~adns_qf_search) | qf_extra; | |
550 | adns_rrtype qtf= qu->answer->type & adns__qtf_deref; | |
551 | unsigned which= qu->ctx.tinfo.addr.want & ~qu->ctx.tinfo.addr.have; | |
552 | qcontext ctx; | |
553 | ||
554 | memset(&ctx, 0, sizeof(ctx)); | |
555 | ctx.callback= icb_addr; | |
556 | for (i=0; i<addr_nrrtypes; i++) { | |
557 | if (!(which & (1 << i))) continue; | |
558 | err= adns__mkquery_frdgram(qu->ads, &qu->vb, &id, qd_dgram,qd_dglen, | |
559 | DNS_HDRSIZE, addr_all_rrtypes[i], qf); | |
560 | if (err) goto x_error; | |
561 | err= adns__internal_submit(qu->ads, &cqu, qu, &tinfo_addrsub, | |
562 | addr_all_rrtypes[i] | qtf, | |
563 | &qu->vb, id, qf, now, &ctx); | |
564 | if (err) goto x_error; | |
565 | cqu->answer->rrsz= qu->answer->rrsz; | |
566 | } | |
567 | qu->state= query_childw; | |
568 | LIST_LINK_TAIL(qu->ads->childw, qu); | |
569 | return; | |
570 | ||
571 | x_error: | |
572 | adns__query_fail(qu, err); | |
573 | } | |
574 | ||
2ca5496d MW |
575 | static adns_status addr_submit(adns_query parent, adns_query *query_r, |
576 | vbuf *qumsg_vb, int id, unsigned want, | |
577 | adns_queryflags flags, struct timeval now, | |
578 | qcontext *ctx) { | |
579 | /* This is effectively a substitute for adns__internal_submit, intended for | |
580 | * the case where the caller (possibly) only wants a subset of the | |
581 | * available record types. The memory management and callback rules are | |
582 | * the same as for adns__internal_submit. | |
583 | * | |
584 | * Some differences: the query is linked onto the parent's children list | |
585 | * before exit (though the parent's state is not changed, and it is not | |
586 | * linked into the childw list queue); and we fiddle with the `tinfo' | |
587 | * portion of the context structure (yes, modifying *ctx), since this is, | |
588 | * in fact, the main purpose of this function. | |
589 | */ | |
590 | ||
591 | adns_state ads= parent->ads; | |
592 | adns_query qu; | |
593 | adns_status err; | |
594 | adns_rrtype type= ((adns_r_addr & adns_rrt_reprmask) | | |
595 | (parent->answer->type & ~adns_rrt_reprmask)); | |
596 | ||
597 | ctx->tinfo.addr.want= want; | |
598 | ctx->tinfo.addr.have= 0; | |
599 | err= adns__internal_submit(ads, &qu, parent, adns__findtype(adns_r_addr), | |
600 | type, qumsg_vb, id, flags, now, ctx); | |
601 | if (err) return err; | |
602 | ||
603 | *query_r= qu; | |
604 | return adns_s_ok; | |
605 | } | |
606 | ||
9d138734 MW |
607 | static adns_status append_addrs(adns_query qu, size_t rrsz, |
608 | adns_rr_addr **dp, int *dlen, | |
609 | const adns_rr_addr *sp, int slen) { | |
610 | /* Append a vector of slen addr records, each of size rrsz, starting at ap, | |
611 | * to a vector starting at *dp, of length *dlen. On successful completion, | |
612 | * *dp and *dlen are updated. | |
613 | */ | |
614 | ||
615 | size_t drrsz= *dlen*rrsz, srrsz= slen*rrsz; | |
616 | byte *p; | |
617 | ||
618 | if (!slen) return adns_s_ok; | |
619 | p= adns__alloc_interim(qu, drrsz + srrsz); | |
620 | if (!p) R_NOMEM; | |
621 | if (*dlen) { | |
622 | memcpy(p, *dp, drrsz); | |
623 | adns__free_interim(qu, *dp); | |
624 | } | |
625 | memcpy(p + drrsz, sp, srrsz); | |
626 | *dlen += slen; | |
627 | *dp= (adns_rr_addr *)p; | |
628 | return adns_s_ok; | |
629 | } | |
630 | ||
631 | static void propagate_ttl(adns_query to, adns_query from) | |
632 | { if (to->expires > from->expires) to->expires= from->expires; } | |
633 | ||
634 | static adns_status copy_cname_from_child(adns_query parent, adns_query child) { | |
635 | adns_answer *pans= parent->answer, *cans= child->answer; | |
636 | size_t n= strlen(cans->cname) + 1; | |
637 | ||
638 | pans->cname= adns__alloc_preserved(parent, n); | |
639 | if (!pans->cname) R_NOMEM; | |
640 | memcpy(pans->cname, cans->cname, n); | |
641 | return adns_s_ok; | |
642 | } | |
643 | ||
644 | static void done_addr_type(adns_query qu, adns_rrtype type) { | |
645 | unsigned f= addr_rrtypeflag(type); | |
646 | assert(f); qu->ctx.tinfo.addr.have |= f; | |
647 | } | |
648 | ||
649 | static void icb_addr(adns_query parent, adns_query child) { | |
650 | adns_state ads= parent->ads; | |
651 | adns_answer *pans= parent->answer, *cans= child->answer; | |
652 | struct timeval now; | |
653 | adns_status err; | |
1bc731c6 MW |
654 | adns_queryflags qf; |
655 | int id; | |
9d138734 MW |
656 | |
657 | propagate_ttl(parent, child); | |
658 | ||
1bc731c6 MW |
659 | if (!(child->flags & adns__qf_addr_cname) && |
660 | (parent->flags & adns__qf_addr_answer) && | |
661 | (!!pans->cname != !!cans->cname || | |
662 | (pans->cname && strcmp(pans->cname, cans->cname)))) { | |
663 | /* We've detected an inconsistency in CNAME records, and must deploy | |
664 | * countermeasures. | |
665 | */ | |
666 | ||
667 | if (!pans->cname) { | |
668 | /* The child has a CNAME record, but the parent doesn't. We must | |
669 | * discard all of the parent's addresses, and substitute the child's. | |
670 | */ | |
671 | ||
672 | assert(pans->rrsz == cans->rrsz); | |
673 | adns__free_interim(parent, pans->rrs.bytes); | |
674 | adns__transfer_interim(child, parent, cans->rrs.bytes); | |
675 | pans->rrs.bytes= cans->rrs.bytes; | |
676 | pans->nrrs= cans->nrrs; | |
677 | parent->ctx.tinfo.addr.have= 0; | |
678 | done_addr_type(parent, cans->type); | |
679 | err= copy_cname_from_child(parent, child); if (err) goto x_err; | |
680 | } | |
681 | ||
682 | /* We've settled on the CNAME (now) associated with the parent, which | |
683 | * already has appropriate address records. Build a query datagram for | |
684 | * this name so that we can issue child queries for the missing address | |
685 | * families. The child's vbuf looks handy for this. | |
686 | */ | |
687 | err= adns__mkquery(ads, &child->vb, &id, pans->cname, | |
688 | strlen(pans->cname), &tinfo_addrsub, | |
689 | adns_r_addr, parent->flags); | |
690 | if (err) goto x_err; | |
691 | ||
692 | /* Now cancel the remaining children, and try again with the CNAME we've | |
693 | * settled on. | |
694 | */ | |
695 | adns__cancel_children(parent); | |
696 | if (gettimeofday(&now, 0)) goto x_gtod; | |
697 | qf= adns__qf_addr_cname; | |
698 | if (!(parent->flags & adns_qf_cname_loose)) qf |= adns_qf_cname_forbid; | |
699 | addr_subqueries(parent, now, qf, child->vb.buf, child->vb.used); | |
700 | return; | |
701 | } | |
702 | ||
9d138734 MW |
703 | if (cans->cname && !pans->cname) { |
704 | err= copy_cname_from_child(parent, child); | |
705 | if (err) goto x_err; | |
706 | } | |
707 | ||
708 | if ((parent->flags & adns_qf_search) && | |
709 | !pans->cname && cans->status == adns_s_nxdomain) { | |
710 | /* We're searching a list of suffixes, and the name doesn't exist. Try | |
711 | * the next one. | |
712 | */ | |
713 | ||
714 | adns__cancel_children(parent); | |
715 | adns__free_interim(parent, pans->rrs.bytes); | |
716 | pans->rrs.bytes= 0; pans->nrrs= 0; | |
717 | if (gettimeofday(&now, 0)) goto x_gtod; | |
718 | adns__search_next(ads, parent, now); | |
719 | return; | |
720 | } | |
721 | ||
722 | if (cans->status && cans->status != adns_s_nodata) | |
723 | { err= cans->status; goto x_err; } | |
724 | ||
725 | assert(pans->rrsz == cans->rrsz); | |
726 | err= append_addrs(parent, pans->rrsz, | |
727 | &pans->rrs.addr, &pans->nrrs, | |
728 | cans->rrs.addr, cans->nrrs); | |
729 | if (err) goto x_err; | |
730 | done_addr_type(parent, cans->type); | |
731 | ||
732 | if (parent->children.head) LIST_LINK_TAIL(ads->childw, parent); | |
733 | else if (!pans->nrrs) adns__query_fail(parent, adns_s_nodata); | |
734 | else adns__query_done(parent); | |
1bc731c6 | 735 | parent->flags |= adns__qf_addr_answer; |
9d138734 MW |
736 | return; |
737 | ||
738 | x_gtod: | |
739 | adns__diag(ads, -1, parent, "gettimeofday failed: %s", strerror(errno)); | |
740 | err= adns_s_systemfail; | |
741 | goto x_err; | |
742 | ||
743 | x_err: | |
744 | adns__query_fail(parent, err); | |
745 | } | |
746 | ||
747 | static void qs_addr(adns_query qu, struct timeval now) { | |
748 | if (!qu->ctx.tinfo.addr.want) { | |
749 | qu->ctx.tinfo.addr.want= addr_rrtypes(qu->ads, qu->answer->type, | |
750 | qu->flags); | |
751 | qu->ctx.tinfo.addr.have= 0; | |
752 | } | |
753 | addr_subqueries(qu, now, 0, qu->query_dgram, qu->query_dglen); | |
754 | } | |
755 | ||
eb81d633 | 756 | /* |
b365d68a | 757 | * _domain (pap,csp,cs) |
758 | * _dom_raw (pa) | |
eb81d633 | 759 | */ |
760 | ||
1dfe95d8 | 761 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
762 | char **domain_r, parsedomain_flags flags) { | |
e062dcae | 763 | adns_status st; |
764 | char *dm; | |
765 | ||
1dfe95d8 | 766 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
767 | pai->dgram,pai->dglen, cbyte_io, max); | |
e062dcae | 768 | if (st) return st; |
1dfe95d8 | 769 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
e062dcae | 770 | |
1dfe95d8 | 771 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
772 | if (!dm) R_NOMEM; | |
e062dcae | 773 | |
1dfe95d8 | 774 | dm[pai->qu->vb.used]= 0; |
775 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); | |
e062dcae | 776 | |
777 | *domain_r= dm; | |
778 | return adns_s_ok; | |
779 | } | |
780 | ||
b365d68a | 781 | static adns_status csp_domain(vbuf *vb, const char *domain) { |
782 | CSP_ADDSTR(domain); | |
783 | if (!*domain) CSP_ADDSTR("."); | |
784 | return adns_s_ok; | |
785 | } | |
786 | ||
787 | static adns_status cs_domain(vbuf *vb, const void *datap) { | |
788 | const char *const *domainp= datap; | |
789 | return csp_domain(vb,*domainp); | |
790 | } | |
791 | ||
609133ee | 792 | static adns_status pa_dom_raw(const parseinfo *pai, int cbyte, |
793 | int max, void *datap) { | |
b365d68a | 794 | char **rrp= datap; |
795 | adns_status st; | |
796 | ||
797 | st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok); | |
798 | if (st) return st; | |
799 | ||
800 | if (cbyte != max) return adns_s_invaliddata; | |
801 | return adns_s_ok; | |
802 | } | |
803 | ||
eb81d633 | 804 | /* |
805 | * _host_raw (pa) | |
806 | */ | |
807 | ||
609133ee | 808 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, |
809 | int max, void *datap) { | |
e062dcae | 810 | char **rrp= datap; |
ffbda80c | 811 | adns_status st; |
86e7b8d9 | 812 | |
1dfe95d8 | 813 | st= pap_domain(pai, &cbyte, max, rrp, |
814 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
e062dcae | 815 | if (st) return st; |
816 | ||
817 | if (cbyte != max) return adns_s_invaliddata; | |
818 | return adns_s_ok; | |
819 | } | |
ffbda80c | 820 | |
eb81d633 | 821 | /* |
382b81f7 | 822 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr) |
eb81d633 | 823 | */ |
c7836bc9 | 824 | |
1dfe95d8 | 825 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
2ca5496d | 826 | unsigned *want_io, size_t addrsz, |
1dfe95d8 | 827 | int *cbyte_io, int count, int dmstart) { |
828 | int rri, naddrs; | |
2ca5496d MW |
829 | unsigned typef, want= *want_io, need= want; |
830 | int type, class, rdlen, rdend, rdstart, ownermatched; | |
73dba56e | 831 | unsigned long ttl; |
1dfe95d8 | 832 | adns_status st; |
c7836bc9 | 833 | |
2ca5496d | 834 | for (rri=0, naddrs=0; rri<count; rri++) { |
609133ee | 835 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, |
836 | pai->dglen, cbyte_io, | |
73dba56e | 837 | &type, &class, &ttl, &rdlen, &rdstart, |
1dfe95d8 | 838 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
c7836bc9 | 839 | if (st) return st; |
2ca5496d MW |
840 | if (!ownermatched || class != DNS_CLASS_IN) continue; |
841 | typef= addr_rrtypeflag(type); | |
842 | if (!(want & typef)) continue; | |
843 | need &= ~typef; | |
844 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) R_NOMEM; | |
73dba56e | 845 | adns__update_expires(pai->qu,ttl,pai->now); |
908dbcfa | 846 | rdend= rdstart + rdlen; |
2ca5496d | 847 | st= pap_addr(pai, type, addrsz, &rdstart, rdend, |
908dbcfa | 848 | (adns_rr_addr *)(pai->qu->vb.buf + naddrs*addrsz)); |
c7836bc9 | 849 | if (st) return st; |
908dbcfa | 850 | if (rdstart != rdend) return adns_s_invaliddata; |
1dfe95d8 | 851 | naddrs++; |
c7836bc9 | 852 | } |
2ca5496d MW |
853 | if (naddrs > 0) { |
854 | st= append_addrs(pai->qu, addrsz, &ha->addrs, &ha->naddrs, | |
855 | (const adns_rr_addr *)pai->qu->vb.buf, naddrs); | |
856 | if (st) return st; | |
c7836bc9 | 857 | ha->astatus= adns_s_ok; |
1dfe95d8 | 858 | |
2ca5496d MW |
859 | if (!need) { |
860 | adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf, | |
861 | div_addr, pai->ads); | |
862 | } | |
c7836bc9 | 863 | } |
2ca5496d | 864 | *want_io= need; |
c7836bc9 | 865 | return adns_s_ok; |
866 | } | |
867 | ||
551ff40f | 868 | static void icb_hostaddr(adns_query parent, adns_query child) { |
551ff40f | 869 | adns_answer *cans= child->answer; |
0ea82d76 | 870 | adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr; |
4218fb9a | 871 | adns_state ads= parent->ads; |
b365d68a | 872 | adns_status st; |
2ca5496d | 873 | size_t addrsz= gsz_addr(0, parent->answer->type); |
551ff40f | 874 | |
2ca5496d MW |
875 | st= cans->status == adns_s_nodata ? adns_s_ok : cans->status; |
876 | if (st) goto done; | |
877 | propagate_ttl(parent, child); | |
878 | ||
879 | assert(addrsz == cans->rrsz); | |
880 | st= append_addrs(parent, addrsz, | |
881 | &rrp->addrs, &rrp->naddrs, | |
882 | cans->rrs.addr, cans->nrrs); | |
883 | if (st) goto done; | |
884 | if (!rrp->naddrs) { st= adns_s_nodata; goto done; } | |
885 | ||
886 | if (!adns__vbuf_ensure(&parent->vb, addrsz)) | |
887 | { st= adns_s_nomemory; goto done; } | |
888 | adns__isort(rrp->addrs, rrp->naddrs, addrsz, parent->vb.buf, | |
889 | div_addr, ads); | |
890 | ||
891 | done: | |
892 | if (st) { | |
893 | adns__free_interim(parent, rrp->addrs); | |
894 | rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : 0; | |
895 | } | |
a6536d8b | 896 | |
2ca5496d | 897 | rrp->astatus= st; |
4218fb9a | 898 | if (parent->children.head) { |
899 | LIST_LINK_TAIL(ads->childw,parent); | |
900 | } else { | |
901 | adns__query_done(parent); | |
902 | } | |
551ff40f | 903 | } |
904 | ||
1dfe95d8 | 905 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
906 | int max, adns_rr_hostaddr *rrp) { | |
c7836bc9 | 907 | adns_status st; |
908 | int dmstart, cbyte; | |
7da21070 | 909 | qcontext ctx; |
910 | int id; | |
911 | adns_query nqu; | |
4b707d8b | 912 | adns_queryflags nflags; |
2ca5496d | 913 | unsigned want; |
b0a32b17 | 914 | size_t addrsz= gsz_addr(0, pai->qu->answer->type); |
c7836bc9 | 915 | |
916 | dmstart= cbyte= *cbyte_io; | |
1dfe95d8 | 917 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
918 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
c7836bc9 | 919 | if (st) return st; |
920 | *cbyte_io= cbyte; | |
921 | ||
922 | rrp->astatus= adns_s_ok; | |
2ca5496d | 923 | rrp->naddrs= 0; |
c7836bc9 | 924 | rrp->addrs= 0; |
925 | ||
1dfe95d8 | 926 | cbyte= pai->nsstart; |
c7836bc9 | 927 | |
2ca5496d MW |
928 | want= addr_rrtypes(pai->ads, pai->qu->answer->type, pai->qu->flags); |
929 | ||
930 | st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->nscount, dmstart); | |
c7836bc9 | 931 | if (st) return st; |
2ca5496d | 932 | if (!want) return adns_s_ok; |
c7836bc9 | 933 | |
2ca5496d | 934 | st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->arcount, dmstart); |
c7836bc9 | 935 | if (st) return st; |
2ca5496d | 936 | if (!want) return adns_s_ok; |
1dfe95d8 | 937 | |
7da21070 | 938 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
939 | pai->dgram, pai->dglen, dmstart, | |
940 | adns_r_addr, adns_qf_quoteok_query); | |
941 | if (st) return st; | |
551ff40f | 942 | |
a6536d8b | 943 | ctx.ext= 0; |
944 | ctx.callback= icb_hostaddr; | |
0ea82d76 | 945 | ctx.pinfo.hostaddr= rrp; |
4b707d8b | 946 | |
138722f0 MW |
947 | nflags= adns_qf_quoteok_query | (pai->qu->flags & (adns_qf_want_allaf | |
948 | adns_qf_ipv6_mapv4)); | |
4b707d8b | 949 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; |
950 | ||
2ca5496d MW |
951 | st= addr_submit(pai->qu, &nqu, &pai->qu->vb, id, want, |
952 | nflags, pai->now, &ctx); | |
7da21070 | 953 | if (st) return st; |
954 | ||
1dfe95d8 | 955 | return adns_s_ok; |
c7836bc9 | 956 | } |
957 | ||
609133ee | 958 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, |
959 | int max, void *datap) { | |
1dfe95d8 | 960 | adns_rr_hostaddr *rrp= datap; |
c7836bc9 | 961 | adns_status st; |
c7836bc9 | 962 | |
1dfe95d8 | 963 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
c7836bc9 | 964 | if (st) return st; |
965 | if (cbyte != max) return adns_s_invaliddata; | |
966 | ||
1dfe95d8 | 967 | return adns_s_ok; |
968 | } | |
c7836bc9 | 969 | |
609133ee | 970 | static int dip_hostaddr(adns_state ads, |
971 | const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { | |
1dfe95d8 | 972 | if (ap->astatus != bp->astatus) return ap->astatus; |
973 | if (ap->astatus) return 0; | |
c7836bc9 | 974 | |
f930c455 | 975 | return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa); |
1dfe95d8 | 976 | } |
977 | ||
609133ee | 978 | static int di_hostaddr(adns_state ads, |
979 | const void *datap_a, const void *datap_b) { | |
1dfe95d8 | 980 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
981 | ||
09957b1c | 982 | return dip_hostaddr(ads, ap,bp); |
c7836bc9 | 983 | } |
984 | ||
eb81d633 | 985 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
986 | void *tablev; | |
b0a32b17 | 987 | size_t addrsz= gsz_addr(0, qu->answer->type); |
e062dcae | 988 | |
eb81d633 | 989 | adns__makefinal_str(qu,&rrp->host); |
990 | tablev= rrp->addrs; | |
b0a32b17 | 991 | adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz); |
eb81d633 | 992 | rrp->addrs= tablev; |
e062dcae | 993 | } |
994 | ||
eb81d633 | 995 | static void mf_hostaddr(adns_query qu, void *datap) { |
996 | adns_rr_hostaddr *rrp= datap; | |
e062dcae | 997 | |
eb81d633 | 998 | mfp_hostaddr(qu,rrp); |
e062dcae | 999 | } |
1000 | ||
1dfe95d8 | 1001 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
a6f1dc92 | 1002 | const char *errstr; |
1dfe95d8 | 1003 | adns_status st; |
ac77ffc1 | 1004 | char buf[20]; |
1dfe95d8 | 1005 | int i; |
1006 | ||
a6f1dc92 | 1007 | st= csp_domain(vb,rrp->host); if (st) return st; |
1dfe95d8 | 1008 | |
b365d68a | 1009 | CSP_ADDSTR(" "); |
ac77ffc1 | 1010 | CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus)); |
1011 | ||
1012 | sprintf(buf," %d ",rrp->astatus); | |
1013 | CSP_ADDSTR(buf); | |
a6f1dc92 | 1014 | |
ac77ffc1 | 1015 | CSP_ADDSTR(adns_errabbrev(rrp->astatus)); |
a6f1dc92 | 1016 | CSP_ADDSTR(" "); |
ac77ffc1 | 1017 | |
a6f1dc92 | 1018 | errstr= adns_strerror(rrp->astatus); |
1019 | st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st; | |
b365d68a | 1020 | |
1021 | if (rrp->naddrs >= 0) { | |
1022 | CSP_ADDSTR(" ("); | |
1023 | for (i=0; i<rrp->naddrs; i++) { | |
1024 | CSP_ADDSTR(" "); | |
1dfe95d8 | 1025 | st= csp_addr(vb,&rrp->addrs[i]); |
1026 | } | |
b365d68a | 1027 | CSP_ADDSTR(" )"); |
1028 | } else { | |
1029 | CSP_ADDSTR(" ?"); | |
1dfe95d8 | 1030 | } |
1031 | return adns_s_ok; | |
1032 | } | |
1033 | ||
1034 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { | |
1035 | const adns_rr_hostaddr *rrp= datap; | |
1036 | ||
1037 | return csp_hostaddr(vb,rrp); | |
1038 | } | |
1039 | ||
eb81d633 | 1040 | /* |
1041 | * _mx_raw (pa,di) | |
1042 | */ | |
1dfe95d8 | 1043 | |
609133ee | 1044 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, |
1045 | int max, void *datap) { | |
eb81d633 | 1046 | const byte *dgram= pai->dgram; |
1047 | adns_rr_intstr *rrp= datap; | |
1048 | adns_status st; | |
1049 | int pref; | |
1dfe95d8 | 1050 | |
eb81d633 | 1051 | if (cbyte+2 > max) return adns_s_invaliddata; |
1052 | GET_W(cbyte,pref); | |
1053 | rrp->i= pref; | |
1054 | st= pap_domain(pai, &cbyte, max, &rrp->str, | |
1055 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1056 | if (st) return st; | |
1dfe95d8 | 1057 | |
eb81d633 | 1058 | if (cbyte != max) return adns_s_invaliddata; |
1059 | return adns_s_ok; | |
1060 | } | |
1dfe95d8 | 1061 | |
09957b1c | 1062 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 1063 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
1064 | ||
1065 | if (ap->i < bp->i) return 0; | |
1066 | if (ap->i > bp->i) return 1; | |
1067 | return 0; | |
1dfe95d8 | 1068 | } |
1069 | ||
eb81d633 | 1070 | /* |
1071 | * _mx (pa,di) | |
1072 | */ | |
1dfe95d8 | 1073 | |
609133ee | 1074 | static adns_status pa_mx(const parseinfo *pai, int cbyte, |
1075 | int max, void *datap) { | |
eb81d633 | 1076 | const byte *dgram= pai->dgram; |
1077 | adns_rr_inthostaddr *rrp= datap; | |
1078 | adns_status st; | |
1079 | int pref; | |
1080 | ||
1081 | if (cbyte+2 > max) return adns_s_invaliddata; | |
1082 | GET_W(cbyte,pref); | |
1083 | rrp->i= pref; | |
1084 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); | |
1085 | if (st) return st; | |
1086 | ||
1087 | if (cbyte != max) return adns_s_invaliddata; | |
1088 | return adns_s_ok; | |
1089 | } | |
1090 | ||
09957b1c | 1091 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 1092 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
1093 | ||
1094 | if (ap->i < bp->i) return 0; | |
1095 | if (ap->i > bp->i) return 1; | |
09957b1c | 1096 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
1dfe95d8 | 1097 | } |
1098 | ||
eb81d633 | 1099 | /* |
1100 | * _inthostaddr (mf,cs) | |
1101 | */ | |
1102 | ||
1dfe95d8 | 1103 | static void mf_inthostaddr(adns_query qu, void *datap) { |
1104 | adns_rr_inthostaddr *rrp= datap; | |
1105 | ||
1106 | mfp_hostaddr(qu,&rrp->ha); | |
1107 | } | |
1108 | ||
eb81d633 | 1109 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
1110 | const adns_rr_inthostaddr *rrp= datap; | |
1111 | char buf[10]; | |
e062dcae | 1112 | |
eb81d633 | 1113 | sprintf(buf,"%u ",rrp->i); |
1114 | CSP_ADDSTR(buf); | |
1115 | ||
1116 | return csp_hostaddr(vb,&rrp->ha); | |
ffbda80c | 1117 | } |
1118 | ||
b365d68a | 1119 | /* |
1120 | * _inthost (cs) | |
1121 | */ | |
1122 | ||
1123 | static adns_status cs_inthost(vbuf *vb, const void *datap) { | |
1124 | const adns_rr_intstr *rrp= datap; | |
1125 | char buf[10]; | |
1126 | ||
1127 | sprintf(buf,"%u ",rrp->i); | |
1128 | CSP_ADDSTR(buf); | |
1129 | return csp_domain(vb,rrp->str); | |
1130 | } | |
1131 | ||
a6536d8b | 1132 | /* |
938b0228 | 1133 | * _ptr (ckl,pa +icb_ptr) |
a6536d8b | 1134 | */ |
1135 | ||
938b0228 MW |
1136 | static adns_status ckl_ptr(adns_state ads, adns_queryflags flags, |
1137 | union checklabel_state *cls, qcontext *ctx, | |
0b062ecc IJ |
1138 | int labnum, const char *dgram, |
1139 | int labstart, int lablen) { | |
51cb3de3 | 1140 | if (lablen) { |
e9fe1bdb | 1141 | if (!adns__revparse_label(&cls->ptr, labnum, dgram,labstart,lablen)) |
51cb3de3 | 1142 | return adns_s_querydomainwrong; |
938b0228 | 1143 | } else { |
e9fe1bdb IJ |
1144 | if (!adns__revparse_done(&cls->ptr, dgram, labnum, |
1145 | &ctx->tinfo.ptr.rev_rrtype, | |
1146 | &ctx->tinfo.ptr.addr)) | |
51cb3de3 | 1147 | return adns_s_querydomainwrong; |
938b0228 MW |
1148 | } |
1149 | return adns_s_ok; | |
1150 | } | |
1151 | ||
a6536d8b | 1152 | static void icb_ptr(adns_query parent, adns_query child) { |
1153 | adns_answer *cans= child->answer; | |
82ae109e | 1154 | const adns_sockaddr *queried; |
ac5a2748 | 1155 | const unsigned char *found; |
4218fb9a | 1156 | adns_state ads= parent->ads; |
a6536d8b | 1157 | int i; |
1158 | ||
1159 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { | |
1160 | adns__query_fail(parent,adns_s_inconsistent); | |
1161 | return; | |
1162 | } else if (cans->status) { | |
1163 | adns__query_fail(parent,cans->status); | |
1164 | return; | |
1165 | } | |
1166 | ||
ac5a2748 MW |
1167 | queried= &parent->ctx.tinfo.ptr.addr; |
1168 | for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) { | |
82ae109e IJ |
1169 | if (adns__addrs_equal_raw(&queried->sa, |
1170 | parent->ctx.tinfo.ptr.addr.sa.sa_family,found)) { | |
4218fb9a | 1171 | if (!parent->children.head) { |
1172 | adns__query_done(parent); | |
1173 | return; | |
1174 | } else { | |
1175 | LIST_LINK_TAIL(ads->childw,parent); | |
1176 | return; | |
1177 | } | |
a6536d8b | 1178 | } |
1179 | } | |
1180 | ||
1181 | adns__query_fail(parent,adns_s_inconsistent); | |
1182 | } | |
1183 | ||
609133ee | 1184 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, |
1185 | int max, void *datap) { | |
a6536d8b | 1186 | char **rrp= datap; |
1187 | adns_status st; | |
51cb3de3 | 1188 | adns_rrtype rrtype= pai->qu->ctx.tinfo.ptr.rev_rrtype; |
938b0228 | 1189 | int cbyte, id; |
a6536d8b | 1190 | adns_query nqu; |
1191 | qcontext ctx; | |
1192 | ||
1193 | cbyte= dmstart; | |
1194 | st= pap_domain(pai, &cbyte, max, rrp, | |
1195 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1196 | if (st) return st; | |
1197 | if (cbyte != max) return adns_s_invaliddata; | |
1198 | ||
a6536d8b | 1199 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
1200 | pai->dgram, pai->dglen, dmstart, | |
51cb3de3 | 1201 | rrtype, adns_qf_quoteok_query); |
a6536d8b | 1202 | if (st) return st; |
1203 | ||
1204 | ctx.ext= 0; | |
1205 | ctx.callback= icb_ptr; | |
0ea82d76 MW |
1206 | memset(&ctx.pinfo,0,sizeof(ctx.pinfo)); |
1207 | memset(&ctx.tinfo,0,sizeof(ctx.tinfo)); | |
07c3d3e2 IJ |
1208 | st= adns__internal_submit(pai->ads, &nqu, pai->qu, |
1209 | adns__findtype(rrtype), | |
51cb3de3 MW |
1210 | rrtype, &pai->qu->vb, id, |
1211 | adns_qf_quoteok_query, pai->now, &ctx); | |
a6536d8b | 1212 | if (st) return st; |
1213 | ||
a6536d8b | 1214 | return adns_s_ok; |
1215 | } | |
1216 | ||
9ec44266 | 1217 | /* |
b365d68a | 1218 | * _strpair (mf) |
9ec44266 | 1219 | */ |
1220 | ||
1221 | static void mf_strpair(adns_query qu, void *datap) { | |
1222 | adns_rr_strpair *rrp= datap; | |
1223 | ||
1224 | adns__makefinal_str(qu,&rrp->array[0]); | |
1225 | adns__makefinal_str(qu,&rrp->array[1]); | |
1226 | } | |
1227 | ||
9ec44266 | 1228 | /* |
b365d68a | 1229 | * _intstrpair (mf) |
9ec44266 | 1230 | */ |
1231 | ||
1232 | static void mf_intstrpair(adns_query qu, void *datap) { | |
1233 | adns_rr_intstrpair *rrp= datap; | |
1234 | ||
1235 | adns__makefinal_str(qu,&rrp->array[0].str); | |
1236 | adns__makefinal_str(qu,&rrp->array[1].str); | |
1237 | } | |
1238 | ||
9ec44266 | 1239 | /* |
1240 | * _hinfo (pa) | |
1241 | */ | |
1242 | ||
609133ee | 1243 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, |
1244 | int max, void *datap) { | |
9ec44266 | 1245 | adns_rr_intstrpair *rrp= datap; |
1246 | adns_status st; | |
1247 | int i; | |
1248 | ||
1249 | for (i=0; i<2; i++) { | |
b365d68a | 1250 | st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
9ec44266 | 1251 | if (st) return st; |
1252 | } | |
1253 | ||
1254 | if (cbyte != max) return adns_s_invaliddata; | |
1255 | ||
1256 | return adns_s_ok; | |
1257 | } | |
1258 | ||
1259 | /* | |
382b81f7 | 1260 | * _mailbox (pap,cs +pap_mailbox822) |
9ec44266 | 1261 | */ |
1262 | ||
609133ee | 1263 | static adns_status pap_mailbox822(const parseinfo *pai, |
1264 | int *cbyte_io, int max, char **mb_r) { | |
eaa44731 | 1265 | int lablen, labstart, i, needquote, c, r, neednorm; |
1266 | const unsigned char *p; | |
1267 | char *str; | |
1268 | findlabel_state fls; | |
1269 | adns_status st; | |
1270 | vbuf *vb; | |
1271 | ||
1272 | vb= &pai->qu->vb; | |
1273 | vb->used= 0; | |
1274 | adns__findlabel_start(&fls, pai->ads, | |
1275 | -1, pai->qu, | |
1276 | pai->dgram, pai->dglen, max, | |
1277 | *cbyte_io, cbyte_io); | |
1278 | st= adns__findlabel_next(&fls,&lablen,&labstart); | |
1279 | if (!lablen) { | |
b365d68a | 1280 | adns__vbuf_appendstr(vb,"."); |
eaa44731 | 1281 | goto x_ok; |
1282 | } | |
1283 | ||
1284 | neednorm= 1; | |
1285 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) { | |
1286 | c= *p++; | |
1287 | if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata; | |
1288 | if (c == '.' && !neednorm) neednorm= 1; | |
7672a872 | 1289 | else if (c==' ' || c>=127 || ctype_822special(c)) needquote++; |
eaa44731 | 1290 | else neednorm= 0; |
1291 | } | |
1292 | ||
1293 | if (needquote || neednorm) { | |
1294 | r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM; | |
1295 | adns__vbuf_appendq(vb,"\"",1); | |
1296 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) { | |
1297 | c= *p; | |
b365d68a | 1298 | if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1); |
eaa44731 | 1299 | adns__vbuf_appendq(vb,p,1); |
1300 | } | |
1301 | adns__vbuf_appendq(vb,"\"",1); | |
1302 | } else { | |
1303 | r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM; | |
1304 | } | |
1305 | ||
1306 | r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM; | |
1307 | ||
1308 | st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram); | |
1309 | if (st) return st; | |
1310 | ||
1311 | x_ok: | |
1312 | str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM; | |
1313 | memcpy(str,vb->buf,vb->used); | |
1314 | str[vb->used]= 0; | |
1315 | *mb_r= str; | |
1316 | return adns_s_ok; | |
9ec44266 | 1317 | } |
1318 | ||
9da4a044 | 1319 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
1320 | char **mb_r) { | |
2c6eb096 | 1321 | if (pai->qu->typei->typekey & adns__qtf_mail822) { |
9da4a044 | 1322 | return pap_mailbox822(pai, cbyte_io, max, mb_r); |
1323 | } else { | |
b365d68a | 1324 | return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok); |
9da4a044 | 1325 | } |
1326 | } | |
1327 | ||
b365d68a | 1328 | static adns_status csp_mailbox(vbuf *vb, const char *mailbox) { |
1329 | return csp_domain(vb,mailbox); | |
1330 | } | |
1331 | ||
9ec44266 | 1332 | /* |
b365d68a | 1333 | * _rp (pa,cs) |
9ec44266 | 1334 | */ |
1335 | ||
609133ee | 1336 | static adns_status pa_rp(const parseinfo *pai, int cbyte, |
1337 | int max, void *datap) { | |
9ec44266 | 1338 | adns_rr_strpair *rrp= datap; |
1339 | adns_status st; | |
1340 | ||
1341 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); | |
1342 | if (st) return st; | |
1343 | ||
1344 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); | |
1345 | if (st) return st; | |
1346 | ||
1347 | if (cbyte != max) return adns_s_invaliddata; | |
1348 | return adns_s_ok; | |
1349 | } | |
1350 | ||
b365d68a | 1351 | static adns_status cs_rp(vbuf *vb, const void *datap) { |
1352 | const adns_rr_strpair *rrp= datap; | |
1353 | adns_status st; | |
1354 | ||
1355 | st= csp_mailbox(vb,rrp->array[0]); if (st) return st; | |
1356 | CSP_ADDSTR(" "); | |
1357 | st= csp_domain(vb,rrp->array[1]); if (st) return st; | |
1358 | ||
1359 | return adns_s_ok; | |
1360 | } | |
1361 | ||
9ec44266 | 1362 | /* |
1363 | * _soa (pa,mf,cs) | |
1364 | */ | |
1365 | ||
609133ee | 1366 | static adns_status pa_soa(const parseinfo *pai, int cbyte, |
1367 | int max, void *datap) { | |
9ec44266 | 1368 | adns_rr_soa *rrp= datap; |
1369 | const byte *dgram= pai->dgram; | |
1370 | adns_status st; | |
1371 | int msw, lsw, i; | |
1372 | ||
1373 | st= pap_domain(pai, &cbyte, max, &rrp->mname, | |
1374 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1375 | if (st) return st; | |
1376 | ||
1377 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); | |
1378 | if (st) return st; | |
1379 | ||
1380 | if (cbyte+20 != max) return adns_s_invaliddata; | |
1381 | ||
1382 | for (i=0; i<5; i++) { | |
1383 | GET_W(cbyte,msw); | |
1384 | GET_W(cbyte,lsw); | |
1385 | (&rrp->serial)[i]= (msw<<16) | lsw; | |
1386 | } | |
1387 | ||
1388 | return adns_s_ok; | |
1389 | } | |
1390 | ||
1391 | static void mf_soa(adns_query qu, void *datap) { | |
1392 | adns_rr_soa *rrp= datap; | |
1393 | ||
1394 | adns__makefinal_str(qu,&rrp->mname); | |
1395 | adns__makefinal_str(qu,&rrp->rname); | |
1396 | } | |
1397 | ||
1398 | static adns_status cs_soa(vbuf *vb, const void *datap) { | |
1399 | const adns_rr_soa *rrp= datap; | |
1400 | char buf[20]; | |
1401 | int i; | |
1402 | adns_status st; | |
1403 | ||
b365d68a | 1404 | st= csp_domain(vb,rrp->mname); if (st) return st; |
9ec44266 | 1405 | CSP_ADDSTR(" "); |
b365d68a | 1406 | st= csp_mailbox(vb,rrp->rname); if (st) return st; |
9ec44266 | 1407 | |
1408 | for (i=0; i<5; i++) { | |
1409 | sprintf(buf," %lu",(&rrp->serial)[i]); | |
1410 | CSP_ADDSTR(buf); | |
1411 | } | |
1412 | ||
1413 | return adns_s_ok; | |
1414 | } | |
1415 | ||
d19b03d0 | 1416 | /* |
e8e5aeac | 1417 | * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
d19b03d0 | 1418 | */ |
1419 | ||
e8e5aeac MW |
1420 | static adns_status ckl_srv(adns_state ads, adns_queryflags flags, |
1421 | union checklabel_state *cls, qcontext *ctx, | |
0b062ecc IJ |
1422 | int labnum, const char *dgram, |
1423 | int labstart, int lablen) { | |
1424 | const char *label = dgram+labstart; | |
7b4b4314 IJ |
1425 | if (labnum < 2) { |
1426 | if (flags & adns_qf_quoteok_query) return adns_s_ok; | |
e8e5aeac MW |
1427 | if (!lablen || label[0] != '_') return adns_s_querydomaininvalid; |
1428 | return adns_s_ok; | |
d19b03d0 | 1429 | } |
0b062ecc | 1430 | return adns__ckl_hostname(ads,flags, cls,ctx, labnum, dgram,labstart,lablen); |
d19b03d0 | 1431 | } |
1432 | ||
05fc6b3a | 1433 | static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max, |
0e45654b | 1434 | adns_rr_srvha *rrp |
1435 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1436 | const byte *dgram= pai->dgram; |
05fc6b3a | 1437 | int ti, cbyte; |
1438 | ||
1439 | cbyte= *cbyte_io; | |
1440 | if ((*cbyte_io += 6) > max) return adns_s_invaliddata; | |
401c256a | 1441 | |
1442 | rrp->priority= GET_W(cbyte, ti); | |
1443 | rrp->weight= GET_W(cbyte, ti); | |
1444 | rrp->port= GET_W(cbyte, ti); | |
1445 | return adns_s_ok; | |
1446 | } | |
1447 | ||
1448 | static adns_status pa_srvraw(const parseinfo *pai, int cbyte, | |
1449 | int max, void *datap) { | |
1450 | adns_rr_srvraw *rrp= datap; | |
1451 | adns_status st; | |
1452 | ||
05fc6b3a | 1453 | st= pap_srv_begin(pai,&cbyte,max,datap); |
401c256a | 1454 | if (st) return st; |
1455 | ||
1456 | st= pap_domain(pai, &cbyte, max, &rrp->host, | |
1457 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1458 | if (st) return st; | |
1459 | ||
1460 | if (cbyte != max) return adns_s_invaliddata; | |
1461 | return adns_s_ok; | |
1462 | } | |
1463 | ||
1464 | static adns_status pa_srvha(const parseinfo *pai, int cbyte, | |
1465 | int max, void *datap) { | |
1466 | adns_rr_srvha *rrp= datap; | |
1467 | adns_status st; | |
1468 | ||
05fc6b3a | 1469 | st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st; |
401c256a | 1470 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st; |
1471 | if (cbyte != max) return adns_s_invaliddata; | |
1472 | return adns_s_ok; | |
1473 | } | |
1474 | ||
1475 | static void mf_srvraw(adns_query qu, void *datap) { | |
1476 | adns_rr_srvraw *rrp= datap; | |
1477 | adns__makefinal_str(qu, &rrp->host); | |
1478 | } | |
1479 | ||
1480 | static void mf_srvha(adns_query qu, void *datap) { | |
1481 | adns_rr_srvha *rrp= datap; | |
1482 | mfp_hostaddr(qu,&rrp->ha); | |
1483 | } | |
1484 | ||
1485 | static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) { | |
1486 | const adns_rr_srvraw *ap= datap_a, *bp= datap_b; | |
1487 | /* might be const adns_rr_svhostaddr* */ | |
1488 | ||
1489 | if (ap->priority < bp->priority) return 0; | |
1490 | if (ap->priority > bp->priority) return 1; | |
1491 | return 0; | |
1492 | } | |
1493 | ||
0e45654b | 1494 | static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp |
1495 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1496 | char buf[30]; |
1497 | sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port); | |
1498 | CSP_ADDSTR(buf); | |
1499 | return adns_s_ok; | |
1500 | } | |
1501 | ||
1502 | static adns_status cs_srvraw(vbuf *vb, const void *datap) { | |
1503 | const adns_rr_srvraw *rrp= datap; | |
1504 | adns_status st; | |
1505 | ||
0e45654b | 1506 | st= csp_srv_begin(vb,(const void*)rrp); if (st) return st; |
401c256a | 1507 | return csp_domain(vb,rrp->host); |
1508 | } | |
1509 | ||
1510 | static adns_status cs_srvha(vbuf *vb, const void *datap) { | |
1511 | const adns_rr_srvha *rrp= datap; | |
1512 | adns_status st; | |
1513 | ||
0e45654b | 1514 | st= csp_srv_begin(vb,(const void*)datap); if (st) return st; |
401c256a | 1515 | return csp_hostaddr(vb,&rrp->ha); |
1516 | } | |
1517 | ||
042b0909 | 1518 | static void postsort_srv(adns_state ads, void *array, int nrrs,int rrsz, |
d24e2a7e | 1519 | const struct typeinfo *typei) { |
0e45654b | 1520 | /* we treat everything in the array as if it were an adns_rr_srvha |
1521 | * even though the array might be of adns_rr_srvraw. That's OK | |
1522 | * because they have the same prefix, which is all we access. | |
042b0909 | 1523 | * We use rrsz, too, rather than naive array indexing, of course. |
0e45654b | 1524 | */ |
1525 | char *workbegin, *workend, *search, *arrayend; | |
1526 | const adns_rr_srvha *rr; | |
1527 | union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp; | |
1528 | int cpriority, totalweight, runtotal; | |
1529 | long randval; | |
1530 | ||
042b0909 MW |
1531 | assert(rrsz <= sizeof(rrtmp)); |
1532 | for (workbegin= array, arrayend= workbegin + rrsz * nrrs; | |
0e45654b | 1533 | workbegin < arrayend; |
1534 | workbegin= workend) { | |
1535 | cpriority= (rr=(void*)workbegin)->priority; | |
1536 | ||
1537 | for (workend= workbegin, totalweight= 0; | |
1538 | workend < arrayend && (rr=(void*)workend)->priority == cpriority; | |
042b0909 | 1539 | workend += rrsz) { |
0e45654b | 1540 | totalweight += rr->weight; |
0e45654b | 1541 | } |
1542 | ||
1543 | /* Now workbegin..(workend-1) incl. are exactly all of the RRs of | |
1544 | * cpriority. From now on, workbegin points to the `remaining' | |
1545 | * records: we select one record at a time (RFC2782 `Usage rules' | |
1546 | * and `Format of the SRV RR' subsection `Weight') to place at | |
1547 | * workbegin (swapping with the one that was there, and then | |
1548 | * advance workbegin. */ | |
1549 | for (; | |
042b0909 MW |
1550 | workbegin + rrsz < workend; /* don't bother if just one */ |
1551 | workbegin += rrsz) { | |
0e45654b | 1552 | |
1553 | randval= nrand48(ads->rand48xsubi); | |
1554 | randval %= (totalweight + 1); | |
0e45654b | 1555 | /* makes it into 0..totalweight inclusive; with 2^10 RRs, |
1556 | * totalweight must be <= 2^26 so probability nonuniformity is | |
1557 | * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie | |
1558 | * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5). | |
1559 | */ | |
1560 | ||
1561 | for (search=workbegin, runtotal=0; | |
1562 | (runtotal += (rr=(void*)search)->weight) < randval; | |
042b0909 | 1563 | search += rrsz); |
0e45654b | 1564 | assert(search < arrayend); |
1565 | totalweight -= rr->weight; | |
1566 | if (search != workbegin) { | |
042b0909 MW |
1567 | memcpy(&rrtmp, workbegin, rrsz); |
1568 | memcpy(workbegin, search, rrsz); | |
1569 | memcpy(search, &rrtmp, rrsz); | |
0e45654b | 1570 | } |
1571 | } | |
1572 | } | |
d24e2a7e | 1573 | /* tests: |
1574 | * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk. | |
1575 | * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk. | |
1576 | * ./adnshost_s -t srv- _jabber._tcp.jabber.org | |
1577 | */ | |
1578 | } | |
1579 | ||
2c6eb096 | 1580 | /* |
1581 | * _byteblock (mf) | |
1582 | */ | |
1583 | ||
1584 | static void mf_byteblock(adns_query qu, void *datap) { | |
1585 | adns_rr_byteblock *rrp= datap; | |
1586 | void *bytes= rrp->data; | |
1587 | adns__makefinal_block(qu,&bytes,rrp->len); | |
1588 | rrp->data= bytes; | |
1589 | } | |
1590 | ||
1591 | /* | |
1592 | * _opaque (pa,cs) | |
1593 | */ | |
1594 | ||
1595 | static adns_status pa_opaque(const parseinfo *pai, int cbyte, | |
1596 | int max, void *datap) { | |
1597 | adns_rr_byteblock *rrp= datap; | |
1598 | ||
1599 | rrp->len= max - cbyte; | |
1600 | rrp->data= adns__alloc_interim(pai->qu, rrp->len); | |
1601 | if (!rrp->data) R_NOMEM; | |
1602 | memcpy(rrp->data, pai->dgram + cbyte, rrp->len); | |
1603 | return adns_s_ok; | |
1604 | } | |
1605 | ||
1606 | static adns_status cs_opaque(vbuf *vb, const void *datap) { | |
1607 | const adns_rr_byteblock *rrp= datap; | |
1608 | char buf[10]; | |
1609 | int l; | |
1610 | unsigned char *p; | |
1611 | ||
1612 | sprintf(buf,"\\# %d",rrp->len); | |
1613 | CSP_ADDSTR(buf); | |
1614 | ||
1615 | for (l= rrp->len, p= rrp->data; | |
1616 | l>=4; | |
1617 | l -= 4, p += 4) { | |
1618 | sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]); | |
1619 | CSP_ADDSTR(buf); | |
1620 | } | |
1621 | for (; | |
1622 | l>0; | |
1623 | l--, p++) { | |
1624 | sprintf(buf," %02x",*p); | |
1625 | CSP_ADDSTR(buf); | |
1626 | } | |
1627 | return adns_s_ok; | |
1628 | } | |
1629 | ||
eb81d633 | 1630 | /* |
1631 | * _flat (mf) | |
1632 | */ | |
1633 | ||
ffbda80c | 1634 | static void mf_flat(adns_query qu, void *data) { } |
1635 | ||
eb81d633 | 1636 | /* |
1637 | * Now the table. | |
1638 | */ | |
1639 | ||
e062dcae | 1640 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
86e7b8d9 | 1641 | |
c5fd1fbb | 1642 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \ |
d24b603f | 1643 | { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \ |
c5fd1fbb | 1644 | GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \ |
13826233 MW |
1645 | adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \ |
1646 | CDR(__VA_ARGS__) } | |
c5fd1fbb | 1647 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \ |
d24b603f | 1648 | { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \ |
c5fd1fbb | 1649 | GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \ |
13826233 MW |
1650 | adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \ |
1651 | CDR(__VA_ARGS__) } | |
c5fd1fbb MW |
1652 | |
1653 | #define di_0 0 | |
98a3f706 | 1654 | |
1655 | static const typeinfo typeinfos[] = { | |
eb81d633 | 1656 | /* Must be in ascending order of rrtype ! */ |
609133ee | 1657 | /* mem-mgmt code rrt fmt member parser comparer printer */ |
1658 | ||
c5fd1fbb MW |
1659 | FLAT_TYPE(a, "A", 0, inaddr, inaddr, inaddr,inaddr ), |
1660 | DEEP_TYPE(ns_raw, "NS", "raw",str, host_raw,0, domain ), | |
1661 | DEEP_TYPE(cname, "CNAME", 0, str, dom_raw, 0, domain ), | |
1662 | DEEP_TYPE(soa_raw,"SOA", "raw",soa, soa, 0, soa ), | |
1663 | DEEP_TYPE(ptr_raw,"PTR", "raw",str, host_raw,0, domain ), | |
1664 | DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,hinfo, 0, hinfo ), | |
1665 | DEEP_TYPE(mx_raw, "MX", "raw",intstr, mx_raw, mx_raw,inthost ), | |
1666 | DEEP_TYPE(txt, "TXT", 0, manyistr, txt, 0, txt ), | |
1667 | DEEP_TYPE(rp_raw, "RP", "raw",strpair, rp, 0, rp ), | |
50e2b0c3 | 1668 | FLAT_TYPE(aaaa, "AAAA", 0, in6addr, in6addr, in6addr,in6addr ), |
c5fd1fbb | 1669 | DEEP_TYPE(srv_raw,"SRV", "raw",srvraw , srvraw, srv, srvraw, |
e8e5aeac | 1670 | .checklabel= ckl_srv, .postsort= postsort_srv), |
c5fd1fbb | 1671 | |
b0a32b17 | 1672 | FLAT_TYPE(addr, "A", "addr", addr, addr, addr, addr, |
9d138734 | 1673 | .getrrsz= gsz_addr, .query_send= qs_addr), |
c5fd1fbb | 1674 | DEEP_TYPE(ns, "NS", "+addr",hostaddr, hostaddr,hostaddr,hostaddr ), |
938b0228 MW |
1675 | DEEP_TYPE(ptr, "PTR","checked",str, ptr, 0, domain, |
1676 | .checklabel= ckl_ptr), | |
c5fd1fbb MW |
1677 | DEEP_TYPE(mx, "MX", "+addr",inthostaddr,mx, mx, inthostaddr, ), |
1678 | DEEP_TYPE(srv, "SRV","+addr",srvha, srvha, srv, srvha, | |
e8e5aeac | 1679 | .checklabel= ckl_srv, .postsort= postsort_srv), |
c5fd1fbb MW |
1680 | |
1681 | DEEP_TYPE(soa, "SOA","822", soa, soa, 0, soa ), | |
1682 | DEEP_TYPE(rp, "RP", "822", strpair, rp, 0, rp ), | |
98a3f706 | 1683 | }; |
1684 | ||
9d138734 MW |
1685 | static const typeinfo tinfo_addrsub = |
1686 | FLAT_TYPE(none, "<addr>","sub",addr, addr, 0, addr, | |
1687 | .getrrsz= gsz_addr); | |
1688 | ||
2c6eb096 | 1689 | static const typeinfo typeinfo_unknown= |
c5fd1fbb | 1690 | DEEP_TYPE(unknown,0, "unknown",byteblock,opaque, 0, opaque ); |
2c6eb096 | 1691 | |
f759e52e | 1692 | const typeinfo *adns__findtype(adns_rrtype type) { |
1693 | const typeinfo *begin, *end, *mid; | |
98a3f706 | 1694 | |
2c6eb096 | 1695 | if (type & adns_r_unknown) return &typeinfo_unknown; |
d24b603f | 1696 | type &= adns_rrt_reprmask; |
2c6eb096 | 1697 | |
98a3f706 | 1698 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
1699 | ||
1700 | while (begin < end) { | |
1701 | mid= begin + ((end-begin)>>1); | |
2c6eb096 | 1702 | if (mid->typekey == type) return mid; |
1703 | if (type > mid->typekey) begin= mid+1; | |
98a3f706 | 1704 | else end= mid; |
1705 | } | |
1706 | return 0; | |
1707 | } |