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) | |
382b81f7 MW |
50 | * _inaddr (pa,dip,di,cs +search_sortlist) |
51 | * _addr (pa,di,div,csp,cs) | |
52 | * _domain (pap,csp,cs) | |
53 | * _dom_raw (pa) | |
eb81d633 | 54 | * _host_raw (pa) |
382b81f7 MW |
55 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs |
56 | * +pap_findaddrs, icb_hostaddr) | |
eb81d633 | 57 | * _mx_raw (pa,di) |
58 | * _mx (pa,di) | |
59 | * _inthostaddr (mf,cs) | |
382b81f7 | 60 | * _inthost (cs) |
a6536d8b | 61 | * _ptr (pa) |
382b81f7 MW |
62 | * _strpair (mf) |
63 | * _intstrpair (mf) | |
9ec44266 | 64 | * _hinfo (pa) |
382b81f7 MW |
65 | * _mailbox (pap,csp +pap_mailbox822) |
66 | * _rp (pa,cs) | |
9ec44266 | 67 | * _soa (pa,mf,cs) |
382b81f7 | 68 | * _srv* (qdpl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
2c6eb096 | 69 | * _byteblock (mf) |
70 | * _opaque (pa,cs) | |
eb81d633 | 71 | * _flat (mf) |
72 | * | |
73 | * within each section: | |
401c256a | 74 | * qdpl_* |
eb81d633 | 75 | * pap_* |
76 | * pa_* | |
77 | * dip_* | |
78 | * di_* | |
79 | * mfp_* | |
80 | * mf_* | |
81 | * csp_* | |
82 | * cs_* | |
d24e2a7e | 83 | * postsort_* |
eb81d633 | 84 | */ |
85 | ||
86 | /* | |
b365d68a | 87 | * _qstring (pap,csp) |
eb81d633 | 88 | */ |
89 | ||
b365d68a | 90 | static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max, |
9ec44266 | 91 | int *len_r, char **str_r) { |
92 | /* Neither len_r nor str_r may be null. | |
93 | * End of datagram (overrun) is indicated by returning adns_s_invaliddata; | |
94 | */ | |
95 | const byte *dgram= pai->dgram; | |
96 | int l, cbyte; | |
97 | char *str; | |
98 | ||
99 | cbyte= *cbyte_io; | |
100 | ||
101 | if (cbyte >= max) return adns_s_invaliddata; | |
102 | GET_B(cbyte,l); | |
103 | if (cbyte+l > max) return adns_s_invaliddata; | |
104 | ||
105 | str= adns__alloc_interim(pai->qu, l+1); | |
106 | if (!str) R_NOMEM; | |
107 | ||
108 | str[l]= 0; | |
109 | memcpy(str,dgram+cbyte,l); | |
110 | ||
111 | *len_r= l; | |
112 | *str_r= str; | |
113 | *cbyte_io= cbyte+l; | |
114 | ||
115 | return adns_s_ok; | |
116 | } | |
117 | ||
b365d68a | 118 | static adns_status csp_qstring(vbuf *vb, const char *dp, int len) { |
eb81d633 | 119 | unsigned char ch; |
120 | char buf[10]; | |
121 | int cn; | |
122 | ||
123 | CSP_ADDSTR("\""); | |
124 | for (cn=0; cn<len; cn++) { | |
125 | ch= *dp++; | |
b365d68a | 126 | if (ch == '\\') { |
9ec44266 | 127 | CSP_ADDSTR("\\\\"); |
b365d68a | 128 | } else if (ch == '"') { |
129 | CSP_ADDSTR("\\\""); | |
130 | } else if (ch >= 32 && ch <= 126) { | |
131 | if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM; | |
eb81d633 | 132 | } else { |
9ec44266 | 133 | sprintf(buf,"\\x%02x",ch); |
eb81d633 | 134 | CSP_ADDSTR(buf); |
135 | } | |
136 | } | |
137 | CSP_ADDSTR("\""); | |
138 | ||
139 | return adns_s_ok; | |
140 | } | |
141 | ||
eb81d633 | 142 | /* |
b365d68a | 143 | * _str (mf) |
eb81d633 | 144 | */ |
145 | ||
146 | static void mf_str(adns_query qu, void *datap) { | |
147 | char **rrp= datap; | |
148 | ||
149 | adns__makefinal_str(qu,rrp); | |
150 | } | |
151 | ||
eb81d633 | 152 | /* |
b365d68a | 153 | * _intstr (mf) |
eb81d633 | 154 | */ |
155 | ||
156 | static void mf_intstr(adns_query qu, void *datap) { | |
157 | adns_rr_intstr *rrp= datap; | |
158 | ||
159 | adns__makefinal_str(qu,&rrp->str); | |
160 | } | |
161 | ||
eb81d633 | 162 | /* |
b365d68a | 163 | * _manyistr (mf) |
eb81d633 | 164 | */ |
165 | ||
166 | static void mf_manyistr(adns_query qu, void *datap) { | |
167 | adns_rr_intstr **rrp= datap; | |
168 | adns_rr_intstr *te, *table; | |
169 | void *tablev; | |
170 | int tc; | |
171 | ||
172 | for (tc=0, te= *rrp; te->i >= 0; te++, tc++); | |
173 | tablev= *rrp; | |
174 | adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1)); | |
175 | *rrp= table= tablev; | |
176 | for (te= *rrp; te->i >= 0; te++) | |
177 | adns__makefinal_str(qu,&te->str); | |
178 | } | |
179 | ||
eb81d633 | 180 | /* |
b365d68a | 181 | * _txt (pa,cs) |
eb81d633 | 182 | */ |
183 | ||
609133ee | 184 | static adns_status pa_txt(const parseinfo *pai, int cbyte, |
185 | int max, void *datap) { | |
eb81d633 | 186 | adns_rr_intstr **rrp= datap, *table, *te; |
187 | const byte *dgram= pai->dgram; | |
188 | int ti, tc, l, startbyte; | |
9ec44266 | 189 | adns_status st; |
eb81d633 | 190 | |
191 | startbyte= cbyte; | |
192 | if (cbyte >= max) return adns_s_invaliddata; | |
193 | tc= 0; | |
194 | while (cbyte < max) { | |
195 | GET_B(cbyte,l); | |
196 | cbyte+= l; | |
9ec44266 | 197 | tc++; |
eb81d633 | 198 | } |
b365d68a | 199 | if (cbyte != max || !tc) return adns_s_invaliddata; |
eb81d633 | 200 | |
201 | table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1)); | |
202 | if (!table) R_NOMEM; | |
203 | ||
204 | for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) { | |
b365d68a | 205 | st= pap_qstring(pai, &cbyte, max, &te->i, &te->str); |
9ec44266 | 206 | if (st) return st; |
eb81d633 | 207 | } |
208 | assert(cbyte == max); | |
209 | ||
210 | te->i= -1; | |
211 | te->str= 0; | |
212 | ||
213 | *rrp= table; | |
214 | return adns_s_ok; | |
828d89bd | 215 | } |
216 | ||
b365d68a | 217 | static adns_status cs_txt(vbuf *vb, const void *datap) { |
218 | const adns_rr_intstr *const *rrp= datap; | |
219 | const adns_rr_intstr *current; | |
220 | adns_status st; | |
221 | int spc; | |
222 | ||
223 | for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) { | |
224 | if (spc) CSP_ADDSTR(" "); | |
225 | st= csp_qstring(vb,current->str,current->i); if (st) return st; | |
226 | } | |
227 | return adns_s_ok; | |
228 | } | |
229 | ||
230 | /* | |
231 | * _hinfo (cs) | |
232 | */ | |
233 | ||
234 | static adns_status cs_hinfo(vbuf *vb, const void *datap) { | |
235 | const adns_rr_intstrpair *rrp= datap; | |
236 | adns_status st; | |
237 | ||
238 | st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st; | |
239 | CSP_ADDSTR(" "); | |
240 | st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st; | |
241 | return adns_s_ok; | |
242 | } | |
243 | ||
eb81d633 | 244 | /* |
382b81f7 | 245 | * _inaddr (pa,dip,di,cs +search_sortlist) |
eb81d633 | 246 | */ |
247 | ||
609133ee | 248 | static adns_status pa_inaddr(const parseinfo *pai, int cbyte, |
249 | int max, void *datap) { | |
e062dcae | 250 | struct in_addr *storeto= datap; |
e7a9ca47 | 251 | |
252 | if (max-cbyte != 4) return adns_s_invaliddata; | |
1dfe95d8 | 253 | memcpy(storeto, pai->dgram + cbyte, 4); |
e7a9ca47 | 254 | return adns_s_ok; |
255 | } | |
256 | ||
09957b1c | 257 | static int search_sortlist(adns_state ads, struct in_addr ad) { |
258 | const struct sortlist *slp; | |
259 | int i; | |
260 | ||
261 | for (i=0, slp=ads->sortlist; | |
609133ee | 262 | i<ads->nsortlist && |
263 | !((ad.s_addr & slp->mask.s_addr) == slp->base.s_addr); | |
09957b1c | 264 | i++, slp++); |
265 | return i; | |
eb81d633 | 266 | } |
267 | ||
09957b1c | 268 | static int dip_inaddr(adns_state ads, struct in_addr a, struct in_addr b) { |
269 | int ai, bi; | |
270 | ||
271 | if (!ads->nsortlist) return 0; | |
272 | ||
273 | ai= search_sortlist(ads,a); | |
274 | bi= search_sortlist(ads,b); | |
275 | return bi<ai; | |
276 | } | |
277 | ||
609133ee | 278 | static int di_inaddr(adns_state ads, |
279 | const void *datap_a, const void *datap_b) { | |
e062dcae | 280 | const struct in_addr *ap= datap_a, *bp= datap_b; |
281 | ||
09957b1c | 282 | return dip_inaddr(ads,*ap,*bp); |
e062dcae | 283 | } |
284 | ||
285 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { | |
286 | const struct in_addr *rrp= datap, rr= *rrp; | |
86e7b8d9 | 287 | const char *ia; |
288 | ||
e062dcae | 289 | ia= inet_ntoa(rr); assert(ia); |
1dfe95d8 | 290 | CSP_ADDSTR(ia); |
291 | return adns_s_ok; | |
86e7b8d9 | 292 | } |
e7a9ca47 | 293 | |
eb81d633 | 294 | /* |
382b81f7 | 295 | * _addr (pa,di,div,csp,cs) |
eb81d633 | 296 | */ |
297 | ||
609133ee | 298 | static adns_status pa_addr(const parseinfo *pai, int cbyte, |
299 | int max, void *datap) { | |
551ff40f | 300 | adns_rr_addr *storeto= datap; |
1dfe95d8 | 301 | const byte *dgram= pai->dgram; |
c7836bc9 | 302 | |
828d89bd | 303 | if (max-cbyte != 4) return adns_s_invaliddata; |
304 | storeto->len= sizeof(storeto->addr.inet); | |
305 | memset(&storeto->addr,0,sizeof(storeto->addr.inet)); | |
306 | storeto->addr.inet.sin_family= AF_INET; | |
828d89bd | 307 | memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4); |
308 | return adns_s_ok; | |
309 | } | |
310 | ||
09957b1c | 311 | static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) { |
551ff40f | 312 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
828d89bd | 313 | |
1dfe95d8 | 314 | assert(ap->addr.sa.sa_family == AF_INET); |
09957b1c | 315 | return dip_inaddr(ads, ap->addr.inet.sin_addr, bp->addr.inet.sin_addr); |
828d89bd | 316 | } |
317 | ||
09957b1c | 318 | static int div_addr(void *context, const void *datap_a, const void *datap_b) { |
319 | const adns_state ads= context; | |
320 | ||
321 | return di_addr(ads, datap_a, datap_b); | |
322 | } | |
323 | ||
551ff40f | 324 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
828d89bd | 325 | const char *ia; |
47a6797e | 326 | char buf[30]; |
828d89bd | 327 | |
328 | switch (rrp->addr.inet.sin_family) { | |
329 | case AF_INET: | |
b365d68a | 330 | CSP_ADDSTR("INET "); |
828d89bd | 331 | ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia); |
1dfe95d8 | 332 | CSP_ADDSTR(ia); |
828d89bd | 333 | break; |
334 | default: | |
335 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); | |
1dfe95d8 | 336 | CSP_ADDSTR(buf); |
828d89bd | 337 | break; |
338 | } | |
339 | return adns_s_ok; | |
340 | } | |
341 | ||
1dfe95d8 | 342 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
551ff40f | 343 | const adns_rr_addr *rrp= datap; |
1dfe95d8 | 344 | |
345 | return csp_addr(vb,rrp); | |
346 | } | |
347 | ||
eb81d633 | 348 | /* |
b365d68a | 349 | * _domain (pap,csp,cs) |
350 | * _dom_raw (pa) | |
eb81d633 | 351 | */ |
352 | ||
1dfe95d8 | 353 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
354 | char **domain_r, parsedomain_flags flags) { | |
e062dcae | 355 | adns_status st; |
356 | char *dm; | |
357 | ||
1dfe95d8 | 358 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
359 | pai->dgram,pai->dglen, cbyte_io, max); | |
e062dcae | 360 | if (st) return st; |
1dfe95d8 | 361 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
e062dcae | 362 | |
1dfe95d8 | 363 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
364 | if (!dm) R_NOMEM; | |
e062dcae | 365 | |
1dfe95d8 | 366 | dm[pai->qu->vb.used]= 0; |
367 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); | |
e062dcae | 368 | |
369 | *domain_r= dm; | |
370 | return adns_s_ok; | |
371 | } | |
372 | ||
b365d68a | 373 | static adns_status csp_domain(vbuf *vb, const char *domain) { |
374 | CSP_ADDSTR(domain); | |
375 | if (!*domain) CSP_ADDSTR("."); | |
376 | return adns_s_ok; | |
377 | } | |
378 | ||
379 | static adns_status cs_domain(vbuf *vb, const void *datap) { | |
380 | const char *const *domainp= datap; | |
381 | return csp_domain(vb,*domainp); | |
382 | } | |
383 | ||
609133ee | 384 | static adns_status pa_dom_raw(const parseinfo *pai, int cbyte, |
385 | int max, void *datap) { | |
b365d68a | 386 | char **rrp= datap; |
387 | adns_status st; | |
388 | ||
389 | st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok); | |
390 | if (st) return st; | |
391 | ||
392 | if (cbyte != max) return adns_s_invaliddata; | |
393 | return adns_s_ok; | |
394 | } | |
395 | ||
eb81d633 | 396 | /* |
397 | * _host_raw (pa) | |
398 | */ | |
399 | ||
609133ee | 400 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, |
401 | int max, void *datap) { | |
e062dcae | 402 | char **rrp= datap; |
ffbda80c | 403 | adns_status st; |
86e7b8d9 | 404 | |
1dfe95d8 | 405 | st= pap_domain(pai, &cbyte, max, rrp, |
406 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
e062dcae | 407 | if (st) return st; |
408 | ||
409 | if (cbyte != max) return adns_s_invaliddata; | |
410 | return adns_s_ok; | |
411 | } | |
ffbda80c | 412 | |
eb81d633 | 413 | /* |
382b81f7 | 414 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr) |
eb81d633 | 415 | */ |
c7836bc9 | 416 | |
1dfe95d8 | 417 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
418 | int *cbyte_io, int count, int dmstart) { | |
419 | int rri, naddrs; | |
c7836bc9 | 420 | int type, class, rdlen, rdstart, ownermatched; |
73dba56e | 421 | unsigned long ttl; |
1dfe95d8 | 422 | adns_status st; |
c7836bc9 | 423 | |
1dfe95d8 | 424 | for (rri=0, naddrs=-1; rri<count; rri++) { |
609133ee | 425 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, |
426 | pai->dglen, cbyte_io, | |
73dba56e | 427 | &type, &class, &ttl, &rdlen, &rdstart, |
1dfe95d8 | 428 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
c7836bc9 | 429 | if (st) return st; |
1dfe95d8 | 430 | if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) { |
431 | if (naddrs>0) break; else continue; | |
432 | } | |
433 | if (naddrs == -1) { | |
434 | naddrs= 0; | |
c7836bc9 | 435 | } |
609133ee | 436 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_rr_addr))) |
437 | R_NOMEM; | |
73dba56e | 438 | adns__update_expires(pai->qu,ttl,pai->now); |
551ff40f | 439 | st= pa_addr(pai, rdstart,rdstart+rdlen, |
440 | pai->qu->vb.buf + naddrs*sizeof(adns_rr_addr)); | |
c7836bc9 | 441 | if (st) return st; |
1dfe95d8 | 442 | naddrs++; |
c7836bc9 | 443 | } |
1dfe95d8 | 444 | if (naddrs >= 0) { |
551ff40f | 445 | ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_rr_addr)); |
1dfe95d8 | 446 | if (!ha->addrs) R_NOMEM; |
551ff40f | 447 | memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_rr_addr)); |
1dfe95d8 | 448 | ha->naddrs= naddrs; |
c7836bc9 | 449 | ha->astatus= adns_s_ok; |
1dfe95d8 | 450 | |
09957b1c | 451 | adns__isort(ha->addrs, naddrs, sizeof(adns_rr_addr), pai->qu->vb.buf, |
452 | div_addr, pai->ads); | |
c7836bc9 | 453 | } |
454 | return adns_s_ok; | |
455 | } | |
456 | ||
551ff40f | 457 | static void icb_hostaddr(adns_query parent, adns_query child) { |
551ff40f | 458 | adns_answer *cans= child->answer; |
a6536d8b | 459 | adns_rr_hostaddr *rrp= child->ctx.info.hostaddr; |
4218fb9a | 460 | adns_state ads= parent->ads; |
b365d68a | 461 | adns_status st; |
551ff40f | 462 | |
b365d68a | 463 | st= cans->status; |
464 | rrp->astatus= st; | |
465 | rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs; | |
551ff40f | 466 | rrp->addrs= cans->rrs.addr; |
609133ee | 467 | adns__transfer_interim(child, parent, rrp->addrs, |
468 | rrp->naddrs*sizeof(adns_rr_addr)); | |
a6536d8b | 469 | |
4218fb9a | 470 | if (parent->children.head) { |
471 | LIST_LINK_TAIL(ads->childw,parent); | |
472 | } else { | |
473 | adns__query_done(parent); | |
474 | } | |
551ff40f | 475 | } |
476 | ||
1dfe95d8 | 477 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
478 | int max, adns_rr_hostaddr *rrp) { | |
c7836bc9 | 479 | adns_status st; |
480 | int dmstart, cbyte; | |
7da21070 | 481 | qcontext ctx; |
482 | int id; | |
483 | adns_query nqu; | |
4b707d8b | 484 | adns_queryflags nflags; |
c7836bc9 | 485 | |
486 | dmstart= cbyte= *cbyte_io; | |
1dfe95d8 | 487 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
488 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
c7836bc9 | 489 | if (st) return st; |
490 | *cbyte_io= cbyte; | |
491 | ||
492 | rrp->astatus= adns_s_ok; | |
493 | rrp->naddrs= -1; | |
494 | rrp->addrs= 0; | |
495 | ||
1dfe95d8 | 496 | cbyte= pai->nsstart; |
c7836bc9 | 497 | |
1dfe95d8 | 498 | st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart); |
c7836bc9 | 499 | if (st) return st; |
500 | if (rrp->naddrs != -1) return adns_s_ok; | |
501 | ||
1dfe95d8 | 502 | st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart); |
c7836bc9 | 503 | if (st) return st; |
504 | if (rrp->naddrs != -1) return adns_s_ok; | |
1dfe95d8 | 505 | |
7da21070 | 506 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
507 | pai->dgram, pai->dglen, dmstart, | |
508 | adns_r_addr, adns_qf_quoteok_query); | |
509 | if (st) return st; | |
551ff40f | 510 | |
a6536d8b | 511 | ctx.ext= 0; |
512 | ctx.callback= icb_hostaddr; | |
513 | ctx.info.hostaddr= rrp; | |
4b707d8b | 514 | |
515 | nflags= adns_qf_quoteok_query; | |
516 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; | |
517 | ||
7da21070 | 518 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
660d7d3b | 519 | &pai->qu->vb, id, nflags, pai->now, &ctx); |
7da21070 | 520 | if (st) return st; |
521 | ||
522 | nqu->parent= pai->qu; | |
523 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); | |
1dfe95d8 | 524 | |
525 | return adns_s_ok; | |
c7836bc9 | 526 | } |
527 | ||
609133ee | 528 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, |
529 | int max, void *datap) { | |
1dfe95d8 | 530 | adns_rr_hostaddr *rrp= datap; |
c7836bc9 | 531 | adns_status st; |
c7836bc9 | 532 | |
1dfe95d8 | 533 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
c7836bc9 | 534 | if (st) return st; |
535 | if (cbyte != max) return adns_s_invaliddata; | |
536 | ||
1dfe95d8 | 537 | return adns_s_ok; |
538 | } | |
c7836bc9 | 539 | |
609133ee | 540 | static int dip_hostaddr(adns_state ads, |
541 | const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { | |
1dfe95d8 | 542 | if (ap->astatus != bp->astatus) return ap->astatus; |
543 | if (ap->astatus) return 0; | |
c7836bc9 | 544 | |
1dfe95d8 | 545 | assert(ap->addrs[0].addr.sa.sa_family == AF_INET); |
546 | assert(bp->addrs[0].addr.sa.sa_family == AF_INET); | |
09957b1c | 547 | return dip_inaddr(ads, |
548 | ap->addrs[0].addr.inet.sin_addr, | |
549 | bp->addrs[0].addr.inet.sin_addr); | |
1dfe95d8 | 550 | } |
551 | ||
609133ee | 552 | static int di_hostaddr(adns_state ads, |
553 | const void *datap_a, const void *datap_b) { | |
1dfe95d8 | 554 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
555 | ||
09957b1c | 556 | return dip_hostaddr(ads, ap,bp); |
c7836bc9 | 557 | } |
558 | ||
eb81d633 | 559 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
560 | void *tablev; | |
e062dcae | 561 | |
eb81d633 | 562 | adns__makefinal_str(qu,&rrp->host); |
563 | tablev= rrp->addrs; | |
564 | adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs)); | |
565 | rrp->addrs= tablev; | |
e062dcae | 566 | } |
567 | ||
eb81d633 | 568 | static void mf_hostaddr(adns_query qu, void *datap) { |
569 | adns_rr_hostaddr *rrp= datap; | |
e062dcae | 570 | |
eb81d633 | 571 | mfp_hostaddr(qu,rrp); |
e062dcae | 572 | } |
573 | ||
1dfe95d8 | 574 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
a6f1dc92 | 575 | const char *errstr; |
1dfe95d8 | 576 | adns_status st; |
ac77ffc1 | 577 | char buf[20]; |
1dfe95d8 | 578 | int i; |
579 | ||
a6f1dc92 | 580 | st= csp_domain(vb,rrp->host); if (st) return st; |
1dfe95d8 | 581 | |
b365d68a | 582 | CSP_ADDSTR(" "); |
ac77ffc1 | 583 | CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus)); |
584 | ||
585 | sprintf(buf," %d ",rrp->astatus); | |
586 | CSP_ADDSTR(buf); | |
a6f1dc92 | 587 | |
ac77ffc1 | 588 | CSP_ADDSTR(adns_errabbrev(rrp->astatus)); |
a6f1dc92 | 589 | CSP_ADDSTR(" "); |
ac77ffc1 | 590 | |
a6f1dc92 | 591 | errstr= adns_strerror(rrp->astatus); |
592 | st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st; | |
b365d68a | 593 | |
594 | if (rrp->naddrs >= 0) { | |
595 | CSP_ADDSTR(" ("); | |
596 | for (i=0; i<rrp->naddrs; i++) { | |
597 | CSP_ADDSTR(" "); | |
1dfe95d8 | 598 | st= csp_addr(vb,&rrp->addrs[i]); |
599 | } | |
b365d68a | 600 | CSP_ADDSTR(" )"); |
601 | } else { | |
602 | CSP_ADDSTR(" ?"); | |
1dfe95d8 | 603 | } |
604 | return adns_s_ok; | |
605 | } | |
606 | ||
607 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { | |
608 | const adns_rr_hostaddr *rrp= datap; | |
609 | ||
610 | return csp_hostaddr(vb,rrp); | |
611 | } | |
612 | ||
eb81d633 | 613 | /* |
614 | * _mx_raw (pa,di) | |
615 | */ | |
1dfe95d8 | 616 | |
609133ee | 617 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, |
618 | int max, void *datap) { | |
eb81d633 | 619 | const byte *dgram= pai->dgram; |
620 | adns_rr_intstr *rrp= datap; | |
621 | adns_status st; | |
622 | int pref; | |
1dfe95d8 | 623 | |
eb81d633 | 624 | if (cbyte+2 > max) return adns_s_invaliddata; |
625 | GET_W(cbyte,pref); | |
626 | rrp->i= pref; | |
627 | st= pap_domain(pai, &cbyte, max, &rrp->str, | |
628 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
629 | if (st) return st; | |
1dfe95d8 | 630 | |
eb81d633 | 631 | if (cbyte != max) return adns_s_invaliddata; |
632 | return adns_s_ok; | |
633 | } | |
1dfe95d8 | 634 | |
09957b1c | 635 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 636 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
637 | ||
638 | if (ap->i < bp->i) return 0; | |
639 | if (ap->i > bp->i) return 1; | |
640 | return 0; | |
1dfe95d8 | 641 | } |
642 | ||
eb81d633 | 643 | /* |
644 | * _mx (pa,di) | |
645 | */ | |
1dfe95d8 | 646 | |
609133ee | 647 | static adns_status pa_mx(const parseinfo *pai, int cbyte, |
648 | int max, void *datap) { | |
eb81d633 | 649 | const byte *dgram= pai->dgram; |
650 | adns_rr_inthostaddr *rrp= datap; | |
651 | adns_status st; | |
652 | int pref; | |
653 | ||
654 | if (cbyte+2 > max) return adns_s_invaliddata; | |
655 | GET_W(cbyte,pref); | |
656 | rrp->i= pref; | |
657 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); | |
658 | if (st) return st; | |
659 | ||
660 | if (cbyte != max) return adns_s_invaliddata; | |
661 | return adns_s_ok; | |
662 | } | |
663 | ||
09957b1c | 664 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 665 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
666 | ||
667 | if (ap->i < bp->i) return 0; | |
668 | if (ap->i > bp->i) return 1; | |
09957b1c | 669 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
1dfe95d8 | 670 | } |
671 | ||
eb81d633 | 672 | /* |
673 | * _inthostaddr (mf,cs) | |
674 | */ | |
675 | ||
1dfe95d8 | 676 | static void mf_inthostaddr(adns_query qu, void *datap) { |
677 | adns_rr_inthostaddr *rrp= datap; | |
678 | ||
679 | mfp_hostaddr(qu,&rrp->ha); | |
680 | } | |
681 | ||
eb81d633 | 682 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
683 | const adns_rr_inthostaddr *rrp= datap; | |
684 | char buf[10]; | |
e062dcae | 685 | |
eb81d633 | 686 | sprintf(buf,"%u ",rrp->i); |
687 | CSP_ADDSTR(buf); | |
688 | ||
689 | return csp_hostaddr(vb,&rrp->ha); | |
ffbda80c | 690 | } |
691 | ||
eb81d633 | 692 | /* |
b365d68a | 693 | * _inthost (cs) |
694 | */ | |
695 | ||
696 | static adns_status cs_inthost(vbuf *vb, const void *datap) { | |
697 | const adns_rr_intstr *rrp= datap; | |
698 | char buf[10]; | |
699 | ||
700 | sprintf(buf,"%u ",rrp->i); | |
701 | CSP_ADDSTR(buf); | |
702 | return csp_domain(vb,rrp->str); | |
703 | } | |
704 | ||
705 | /* | |
a6536d8b | 706 | * _ptr (pa, +icb_ptr) |
707 | */ | |
708 | ||
709 | static void icb_ptr(adns_query parent, adns_query child) { | |
710 | adns_answer *cans= child->answer; | |
711 | const adns_rr_addr *queried, *found; | |
4218fb9a | 712 | adns_state ads= parent->ads; |
a6536d8b | 713 | int i; |
714 | ||
715 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { | |
716 | adns__query_fail(parent,adns_s_inconsistent); | |
717 | return; | |
718 | } else if (cans->status) { | |
719 | adns__query_fail(parent,cans->status); | |
720 | return; | |
721 | } | |
722 | ||
723 | queried= &parent->ctx.info.ptr_parent_addr; | |
724 | for (i=0, found=cans->rrs.addr; i<cans->nrrs; i++, found++) { | |
725 | if (queried->len == found->len && | |
726 | !memcmp(&queried->addr,&found->addr,queried->len)) { | |
4218fb9a | 727 | if (!parent->children.head) { |
728 | adns__query_done(parent); | |
729 | return; | |
730 | } else { | |
731 | LIST_LINK_TAIL(ads->childw,parent); | |
732 | return; | |
733 | } | |
a6536d8b | 734 | } |
735 | } | |
736 | ||
737 | adns__query_fail(parent,adns_s_inconsistent); | |
738 | } | |
739 | ||
609133ee | 740 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, |
741 | int max, void *datap) { | |
47a6797e | 742 | static const char *const (expectdomain[])= { DNS_INADDR_ARPA }; |
a6536d8b | 743 | |
744 | char **rrp= datap; | |
745 | adns_status st; | |
746 | adns_rr_addr *ap; | |
747 | findlabel_state fls; | |
748 | char *ep; | |
749 | byte ipv[4]; | |
750 | char labbuf[4]; | |
751 | int cbyte, i, lablen, labstart, l, id; | |
752 | adns_query nqu; | |
753 | qcontext ctx; | |
754 | ||
755 | cbyte= dmstart; | |
756 | st= pap_domain(pai, &cbyte, max, rrp, | |
757 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
758 | if (st) return st; | |
759 | if (cbyte != max) return adns_s_invaliddata; | |
760 | ||
761 | ap= &pai->qu->ctx.info.ptr_parent_addr; | |
762 | if (!ap->len) { | |
763 | adns__findlabel_start(&fls, pai->ads, -1, pai->qu, | |
764 | pai->qu->query_dgram, pai->qu->query_dglen, | |
765 | pai->qu->query_dglen, DNS_HDRSIZE, 0); | |
766 | for (i=0; i<4; i++) { | |
767 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); | |
ea1e31e3 | 768 | if (lablen<=0 || lablen>3) return adns_s_querydomainwrong; |
609133ee | 769 | memcpy(labbuf, pai->qu->query_dgram + labstart, lablen); |
770 | labbuf[lablen]= 0; | |
771 | ipv[3-i]= strtoul(labbuf,&ep,10); | |
772 | if (*ep) return adns_s_querydomainwrong; | |
a6536d8b | 773 | if (lablen>1 && pai->qu->query_dgram[labstart]=='0') |
ea1e31e3 | 774 | return adns_s_querydomainwrong; |
a6536d8b | 775 | } |
776 | for (i=0; i<sizeof(expectdomain)/sizeof(*expectdomain); i++) { | |
777 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); | |
778 | l= strlen(expectdomain[i]); | |
609133ee | 779 | if (lablen != l || |
780 | memcmp(pai->qu->query_dgram + labstart, expectdomain[i], l)) | |
ea1e31e3 | 781 | return adns_s_querydomainwrong; |
a6536d8b | 782 | } |
783 | st= adns__findlabel_next(&fls,&lablen,0); assert(!st); | |
ea1e31e3 | 784 | if (lablen) return adns_s_querydomainwrong; |
a6536d8b | 785 | |
786 | ap->len= sizeof(struct sockaddr_in); | |
787 | memset(&ap->addr,0,sizeof(ap->addr.inet)); | |
788 | ap->addr.inet.sin_family= AF_INET; | |
789 | ap->addr.inet.sin_addr.s_addr= | |
790 | htonl((ipv[0]<<24) | (ipv[1]<<16) | (ipv[2]<<8) | (ipv[3])); | |
791 | } | |
792 | ||
793 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, | |
794 | pai->dgram, pai->dglen, dmstart, | |
795 | adns_r_addr, adns_qf_quoteok_query); | |
796 | if (st) return st; | |
797 | ||
798 | ctx.ext= 0; | |
799 | ctx.callback= icb_ptr; | |
800 | memset(&ctx.info,0,sizeof(ctx.info)); | |
801 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), | |
802 | &pai->qu->vb, id, | |
660d7d3b | 803 | adns_qf_quoteok_query, pai->now, &ctx); |
a6536d8b | 804 | if (st) return st; |
805 | ||
806 | nqu->parent= pai->qu; | |
807 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); | |
a6536d8b | 808 | return adns_s_ok; |
809 | } | |
810 | ||
811 | /* | |
b365d68a | 812 | * _strpair (mf) |
9ec44266 | 813 | */ |
814 | ||
815 | static void mf_strpair(adns_query qu, void *datap) { | |
816 | adns_rr_strpair *rrp= datap; | |
817 | ||
818 | adns__makefinal_str(qu,&rrp->array[0]); | |
819 | adns__makefinal_str(qu,&rrp->array[1]); | |
820 | } | |
821 | ||
9ec44266 | 822 | /* |
b365d68a | 823 | * _intstrpair (mf) |
9ec44266 | 824 | */ |
825 | ||
826 | static void mf_intstrpair(adns_query qu, void *datap) { | |
827 | adns_rr_intstrpair *rrp= datap; | |
828 | ||
829 | adns__makefinal_str(qu,&rrp->array[0].str); | |
830 | adns__makefinal_str(qu,&rrp->array[1].str); | |
831 | } | |
832 | ||
9ec44266 | 833 | /* |
834 | * _hinfo (pa) | |
835 | */ | |
836 | ||
609133ee | 837 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, |
838 | int max, void *datap) { | |
9ec44266 | 839 | adns_rr_intstrpair *rrp= datap; |
840 | adns_status st; | |
841 | int i; | |
842 | ||
843 | for (i=0; i<2; i++) { | |
b365d68a | 844 | st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
9ec44266 | 845 | if (st) return st; |
846 | } | |
847 | ||
848 | if (cbyte != max) return adns_s_invaliddata; | |
849 | ||
850 | return adns_s_ok; | |
851 | } | |
852 | ||
853 | /* | |
382b81f7 | 854 | * _mailbox (pap,cs +pap_mailbox822) |
9ec44266 | 855 | */ |
856 | ||
609133ee | 857 | static adns_status pap_mailbox822(const parseinfo *pai, |
858 | int *cbyte_io, int max, char **mb_r) { | |
eaa44731 | 859 | int lablen, labstart, i, needquote, c, r, neednorm; |
860 | const unsigned char *p; | |
861 | char *str; | |
862 | findlabel_state fls; | |
863 | adns_status st; | |
864 | vbuf *vb; | |
865 | ||
866 | vb= &pai->qu->vb; | |
867 | vb->used= 0; | |
868 | adns__findlabel_start(&fls, pai->ads, | |
869 | -1, pai->qu, | |
870 | pai->dgram, pai->dglen, max, | |
871 | *cbyte_io, cbyte_io); | |
872 | st= adns__findlabel_next(&fls,&lablen,&labstart); | |
873 | if (!lablen) { | |
b365d68a | 874 | adns__vbuf_appendstr(vb,"."); |
eaa44731 | 875 | goto x_ok; |
876 | } | |
877 | ||
878 | neednorm= 1; | |
879 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) { | |
880 | c= *p++; | |
881 | if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata; | |
882 | if (c == '.' && !neednorm) neednorm= 1; | |
7672a872 | 883 | else if (c==' ' || c>=127 || ctype_822special(c)) needquote++; |
eaa44731 | 884 | else neednorm= 0; |
885 | } | |
886 | ||
887 | if (needquote || neednorm) { | |
888 | r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM; | |
889 | adns__vbuf_appendq(vb,"\"",1); | |
890 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) { | |
891 | c= *p; | |
b365d68a | 892 | if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1); |
eaa44731 | 893 | adns__vbuf_appendq(vb,p,1); |
894 | } | |
895 | adns__vbuf_appendq(vb,"\"",1); | |
896 | } else { | |
897 | r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM; | |
898 | } | |
899 | ||
900 | r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM; | |
901 | ||
902 | st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram); | |
903 | if (st) return st; | |
904 | ||
905 | x_ok: | |
906 | str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM; | |
907 | memcpy(str,vb->buf,vb->used); | |
908 | str[vb->used]= 0; | |
909 | *mb_r= str; | |
910 | return adns_s_ok; | |
9ec44266 | 911 | } |
912 | ||
9da4a044 | 913 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
914 | char **mb_r) { | |
2c6eb096 | 915 | if (pai->qu->typei->typekey & adns__qtf_mail822) { |
9da4a044 | 916 | return pap_mailbox822(pai, cbyte_io, max, mb_r); |
917 | } else { | |
b365d68a | 918 | return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok); |
9da4a044 | 919 | } |
920 | } | |
921 | ||
b365d68a | 922 | static adns_status csp_mailbox(vbuf *vb, const char *mailbox) { |
923 | return csp_domain(vb,mailbox); | |
924 | } | |
925 | ||
9ec44266 | 926 | /* |
b365d68a | 927 | * _rp (pa,cs) |
9ec44266 | 928 | */ |
929 | ||
609133ee | 930 | static adns_status pa_rp(const parseinfo *pai, int cbyte, |
931 | int max, void *datap) { | |
9ec44266 | 932 | adns_rr_strpair *rrp= datap; |
933 | adns_status st; | |
934 | ||
935 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); | |
936 | if (st) return st; | |
937 | ||
938 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); | |
939 | if (st) return st; | |
940 | ||
941 | if (cbyte != max) return adns_s_invaliddata; | |
942 | return adns_s_ok; | |
943 | } | |
944 | ||
b365d68a | 945 | static adns_status cs_rp(vbuf *vb, const void *datap) { |
946 | const adns_rr_strpair *rrp= datap; | |
947 | adns_status st; | |
948 | ||
949 | st= csp_mailbox(vb,rrp->array[0]); if (st) return st; | |
950 | CSP_ADDSTR(" "); | |
951 | st= csp_domain(vb,rrp->array[1]); if (st) return st; | |
952 | ||
953 | return adns_s_ok; | |
954 | } | |
955 | ||
9ec44266 | 956 | /* |
957 | * _soa (pa,mf,cs) | |
958 | */ | |
959 | ||
609133ee | 960 | static adns_status pa_soa(const parseinfo *pai, int cbyte, |
961 | int max, void *datap) { | |
9ec44266 | 962 | adns_rr_soa *rrp= datap; |
963 | const byte *dgram= pai->dgram; | |
964 | adns_status st; | |
965 | int msw, lsw, i; | |
966 | ||
967 | st= pap_domain(pai, &cbyte, max, &rrp->mname, | |
968 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
969 | if (st) return st; | |
970 | ||
971 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); | |
972 | if (st) return st; | |
973 | ||
974 | if (cbyte+20 != max) return adns_s_invaliddata; | |
975 | ||
976 | for (i=0; i<5; i++) { | |
977 | GET_W(cbyte,msw); | |
978 | GET_W(cbyte,lsw); | |
979 | (&rrp->serial)[i]= (msw<<16) | lsw; | |
980 | } | |
981 | ||
982 | return adns_s_ok; | |
983 | } | |
984 | ||
985 | static void mf_soa(adns_query qu, void *datap) { | |
986 | adns_rr_soa *rrp= datap; | |
987 | ||
988 | adns__makefinal_str(qu,&rrp->mname); | |
989 | adns__makefinal_str(qu,&rrp->rname); | |
990 | } | |
991 | ||
992 | static adns_status cs_soa(vbuf *vb, const void *datap) { | |
993 | const adns_rr_soa *rrp= datap; | |
994 | char buf[20]; | |
995 | int i; | |
996 | adns_status st; | |
997 | ||
b365d68a | 998 | st= csp_domain(vb,rrp->mname); if (st) return st; |
9ec44266 | 999 | CSP_ADDSTR(" "); |
b365d68a | 1000 | st= csp_mailbox(vb,rrp->rname); if (st) return st; |
9ec44266 | 1001 | |
1002 | for (i=0; i<5; i++) { | |
1003 | sprintf(buf," %lu",(&rrp->serial)[i]); | |
1004 | CSP_ADDSTR(buf); | |
1005 | } | |
1006 | ||
1007 | return adns_s_ok; | |
1008 | } | |
1009 | ||
1010 | /* | |
382b81f7 | 1011 | * _srv* (qdpl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
d19b03d0 | 1012 | */ |
1013 | ||
1014 | static adns_status qdpl_srv(adns_state ads, | |
1015 | const char **p_io, const char *pe, int labelnum, | |
1016 | char label_r[DNS_MAXDOMAIN], int *ll_io, | |
1017 | adns_queryflags flags, | |
1018 | const typeinfo *typei) { | |
1019 | int useflags; | |
1020 | const char *p_orig; | |
1021 | adns_status st; | |
1022 | ||
1023 | if (labelnum < 2 && !(flags & adns_qf_quoteok_query)) { | |
1024 | useflags= adns_qf_quoteok_query; | |
1025 | p_orig= *p_io; | |
1026 | } else { | |
1027 | useflags= flags; | |
1028 | p_orig= 0; | |
1029 | } | |
1030 | st= adns__qdpl_normal(ads, p_io,pe, labelnum,label_r, ll_io, useflags,typei); | |
1031 | if (st) return st; | |
1032 | ||
1033 | if (p_orig) { | |
1034 | int ll= *ll_io; | |
1035 | if (!ll || label_r[0]!='_') | |
1036 | return adns_s_querydomaininvalid; | |
1037 | if (memchr(p_orig+1, '\\', pe - (p_orig+1))) | |
1038 | return adns_s_querydomaininvalid; | |
1039 | } | |
1040 | return adns_s_ok; | |
1041 | } | |
1042 | ||
05fc6b3a | 1043 | static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max, |
0e45654b | 1044 | adns_rr_srvha *rrp |
1045 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1046 | const byte *dgram= pai->dgram; |
05fc6b3a | 1047 | int ti, cbyte; |
1048 | ||
1049 | cbyte= *cbyte_io; | |
1050 | if ((*cbyte_io += 6) > max) return adns_s_invaliddata; | |
401c256a | 1051 | |
1052 | rrp->priority= GET_W(cbyte, ti); | |
1053 | rrp->weight= GET_W(cbyte, ti); | |
1054 | rrp->port= GET_W(cbyte, ti); | |
1055 | return adns_s_ok; | |
1056 | } | |
1057 | ||
1058 | static adns_status pa_srvraw(const parseinfo *pai, int cbyte, | |
1059 | int max, void *datap) { | |
1060 | adns_rr_srvraw *rrp= datap; | |
1061 | adns_status st; | |
1062 | ||
05fc6b3a | 1063 | st= pap_srv_begin(pai,&cbyte,max,datap); |
401c256a | 1064 | if (st) return st; |
1065 | ||
1066 | st= pap_domain(pai, &cbyte, max, &rrp->host, | |
1067 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1068 | if (st) return st; | |
1069 | ||
1070 | if (cbyte != max) return adns_s_invaliddata; | |
1071 | return adns_s_ok; | |
1072 | } | |
1073 | ||
1074 | static adns_status pa_srvha(const parseinfo *pai, int cbyte, | |
1075 | int max, void *datap) { | |
1076 | adns_rr_srvha *rrp= datap; | |
1077 | adns_status st; | |
1078 | ||
05fc6b3a | 1079 | st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st; |
401c256a | 1080 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st; |
1081 | if (cbyte != max) return adns_s_invaliddata; | |
1082 | return adns_s_ok; | |
1083 | } | |
1084 | ||
1085 | static void mf_srvraw(adns_query qu, void *datap) { | |
1086 | adns_rr_srvraw *rrp= datap; | |
1087 | adns__makefinal_str(qu, &rrp->host); | |
1088 | } | |
1089 | ||
1090 | static void mf_srvha(adns_query qu, void *datap) { | |
1091 | adns_rr_srvha *rrp= datap; | |
1092 | mfp_hostaddr(qu,&rrp->ha); | |
1093 | } | |
1094 | ||
1095 | static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) { | |
1096 | const adns_rr_srvraw *ap= datap_a, *bp= datap_b; | |
1097 | /* might be const adns_rr_svhostaddr* */ | |
1098 | ||
1099 | if (ap->priority < bp->priority) return 0; | |
1100 | if (ap->priority > bp->priority) return 1; | |
1101 | return 0; | |
1102 | } | |
1103 | ||
0e45654b | 1104 | static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp |
1105 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1106 | char buf[30]; |
1107 | sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port); | |
1108 | CSP_ADDSTR(buf); | |
1109 | return adns_s_ok; | |
1110 | } | |
1111 | ||
1112 | static adns_status cs_srvraw(vbuf *vb, const void *datap) { | |
1113 | const adns_rr_srvraw *rrp= datap; | |
1114 | adns_status st; | |
1115 | ||
0e45654b | 1116 | st= csp_srv_begin(vb,(const void*)rrp); if (st) return st; |
401c256a | 1117 | return csp_domain(vb,rrp->host); |
1118 | } | |
1119 | ||
1120 | static adns_status cs_srvha(vbuf *vb, const void *datap) { | |
1121 | const adns_rr_srvha *rrp= datap; | |
1122 | adns_status st; | |
1123 | ||
0e45654b | 1124 | st= csp_srv_begin(vb,(const void*)datap); if (st) return st; |
401c256a | 1125 | return csp_hostaddr(vb,&rrp->ha); |
1126 | } | |
1127 | ||
0e45654b | 1128 | static void postsort_srv(adns_state ads, void *array, int nrrs, |
d24e2a7e | 1129 | const struct typeinfo *typei) { |
0e45654b | 1130 | /* we treat everything in the array as if it were an adns_rr_srvha |
1131 | * even though the array might be of adns_rr_srvraw. That's OK | |
1132 | * because they have the same prefix, which is all we access. | |
1133 | * We use typei->rrsz, too, rather than naive array indexing, of course. | |
1134 | */ | |
1135 | char *workbegin, *workend, *search, *arrayend; | |
1136 | const adns_rr_srvha *rr; | |
1137 | union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp; | |
1138 | int cpriority, totalweight, runtotal; | |
1139 | long randval; | |
1140 | ||
1141 | for (workbegin= array, arrayend= workbegin + typei->rrsz * nrrs; | |
1142 | workbegin < arrayend; | |
1143 | workbegin= workend) { | |
1144 | cpriority= (rr=(void*)workbegin)->priority; | |
1145 | ||
1146 | for (workend= workbegin, totalweight= 0; | |
1147 | workend < arrayend && (rr=(void*)workend)->priority == cpriority; | |
1148 | workend += typei->rrsz) { | |
1149 | totalweight += rr->weight; | |
0e45654b | 1150 | } |
1151 | ||
1152 | /* Now workbegin..(workend-1) incl. are exactly all of the RRs of | |
1153 | * cpriority. From now on, workbegin points to the `remaining' | |
1154 | * records: we select one record at a time (RFC2782 `Usage rules' | |
1155 | * and `Format of the SRV RR' subsection `Weight') to place at | |
1156 | * workbegin (swapping with the one that was there, and then | |
1157 | * advance workbegin. */ | |
1158 | for (; | |
1159 | workbegin + typei->rrsz < workend; /* don't bother if just one */ | |
1160 | workbegin += typei->rrsz) { | |
1161 | ||
1162 | randval= nrand48(ads->rand48xsubi); | |
1163 | randval %= (totalweight + 1); | |
0e45654b | 1164 | /* makes it into 0..totalweight inclusive; with 2^10 RRs, |
1165 | * totalweight must be <= 2^26 so probability nonuniformity is | |
1166 | * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie | |
1167 | * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5). | |
1168 | */ | |
1169 | ||
1170 | for (search=workbegin, runtotal=0; | |
1171 | (runtotal += (rr=(void*)search)->weight) < randval; | |
1172 | search += typei->rrsz); | |
0e45654b | 1173 | assert(search < arrayend); |
1174 | totalweight -= rr->weight; | |
1175 | if (search != workbegin) { | |
1176 | memcpy(&rrtmp, workbegin, typei->rrsz); | |
1177 | memcpy(workbegin, search, typei->rrsz); | |
1178 | memcpy(search, &rrtmp, typei->rrsz); | |
1179 | } | |
1180 | } | |
1181 | } | |
d24e2a7e | 1182 | /* tests: |
1183 | * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk. | |
1184 | * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk. | |
1185 | * ./adnshost_s -t srv- _jabber._tcp.jabber.org | |
1186 | */ | |
1187 | } | |
1188 | ||
d19b03d0 | 1189 | /* |
2c6eb096 | 1190 | * _byteblock (mf) |
1191 | */ | |
1192 | ||
1193 | static void mf_byteblock(adns_query qu, void *datap) { | |
1194 | adns_rr_byteblock *rrp= datap; | |
1195 | void *bytes= rrp->data; | |
1196 | adns__makefinal_block(qu,&bytes,rrp->len); | |
1197 | rrp->data= bytes; | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * _opaque (pa,cs) | |
1202 | */ | |
1203 | ||
1204 | static adns_status pa_opaque(const parseinfo *pai, int cbyte, | |
1205 | int max, void *datap) { | |
1206 | adns_rr_byteblock *rrp= datap; | |
1207 | ||
1208 | rrp->len= max - cbyte; | |
1209 | rrp->data= adns__alloc_interim(pai->qu, rrp->len); | |
1210 | if (!rrp->data) R_NOMEM; | |
1211 | memcpy(rrp->data, pai->dgram + cbyte, rrp->len); | |
1212 | return adns_s_ok; | |
1213 | } | |
1214 | ||
1215 | static adns_status cs_opaque(vbuf *vb, const void *datap) { | |
1216 | const adns_rr_byteblock *rrp= datap; | |
1217 | char buf[10]; | |
1218 | int l; | |
1219 | unsigned char *p; | |
1220 | ||
1221 | sprintf(buf,"\\# %d",rrp->len); | |
1222 | CSP_ADDSTR(buf); | |
1223 | ||
1224 | for (l= rrp->len, p= rrp->data; | |
1225 | l>=4; | |
1226 | l -= 4, p += 4) { | |
1227 | sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]); | |
1228 | CSP_ADDSTR(buf); | |
1229 | } | |
1230 | for (; | |
1231 | l>0; | |
1232 | l--, p++) { | |
1233 | sprintf(buf," %02x",*p); | |
1234 | CSP_ADDSTR(buf); | |
1235 | } | |
1236 | return adns_s_ok; | |
1237 | } | |
1238 | ||
1239 | /* | |
eb81d633 | 1240 | * _flat (mf) |
1241 | */ | |
1242 | ||
ffbda80c | 1243 | static void mf_flat(adns_query qu, void *data) { } |
1244 | ||
eb81d633 | 1245 | /* |
1246 | * Now the table. | |
1247 | */ | |
1248 | ||
e062dcae | 1249 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
86e7b8d9 | 1250 | |
d19b03d0 | 1251 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \ |
1252 | { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \ | |
d24e2a7e | 1253 | printer,parser,comparer, adns__qdpl_normal,0 } |
d19b03d0 | 1254 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \ |
1255 | { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat, \ | |
d24e2a7e | 1256 | printer,parser,comparer, adns__qdpl_normal,0 } |
1257 | #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer,qdpl,postsort) \ | |
1258 | { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \ | |
1259 | printer,parser,comparer,qdpl,postsort } | |
98a3f706 | 1260 | |
1261 | static const typeinfo typeinfos[] = { | |
eb81d633 | 1262 | /* Must be in ascending order of rrtype ! */ |
609133ee | 1263 | /* mem-mgmt code rrt fmt member parser comparer printer */ |
1264 | ||
1265 | FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr,cs_inaddr ), | |
1266 | DEEP_TYPE(ns_raw, "NS", "raw",str, pa_host_raw,0, cs_domain ), | |
1267 | DEEP_TYPE(cname, "CNAME", 0, str, pa_dom_raw, 0, cs_domain ), | |
1268 | DEEP_TYPE(soa_raw,"SOA", "raw",soa, pa_soa, 0, cs_soa ), | |
1269 | DEEP_TYPE(ptr_raw,"PTR", "raw",str, pa_host_raw,0, cs_domain ), | |
1270 | DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,pa_hinfo, 0, cs_hinfo ), | |
1271 | DEEP_TYPE(mx_raw, "MX", "raw",intstr, pa_mx_raw, di_mx_raw,cs_inthost ), | |
1272 | DEEP_TYPE(txt, "TXT", 0, manyistr,pa_txt, 0, cs_txt ), | |
1273 | DEEP_TYPE(rp_raw, "RP", "raw",strpair, pa_rp, 0, cs_rp ), | |
d24e2a7e | 1274 | XTRA_TYPE(srv_raw,"SRV", "raw",srvraw , pa_srvraw, di_srv, cs_srvraw, |
1275 | qdpl_srv, postsort_srv), | |
609133ee | 1276 | |
1277 | FLAT_TYPE(addr, "A", "addr", addr, pa_addr, di_addr, cs_addr ), | |
1278 | DEEP_TYPE(ns, "NS", "+addr",hostaddr,pa_hostaddr,di_hostaddr,cs_hostaddr ), | |
1279 | DEEP_TYPE(ptr, "PTR","checked",str, pa_ptr, 0, cs_domain ), | |
1280 | DEEP_TYPE(mx, "MX", "+addr",inthostaddr,pa_mx, di_mx, cs_inthostaddr), | |
d24e2a7e | 1281 | XTRA_TYPE(srv, "SRV","+addr",srvha, pa_srvha, di_srv, cs_srvha, |
1282 | qdpl_srv, postsort_srv), | |
d19b03d0 | 1283 | |
609133ee | 1284 | DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0, cs_soa ), |
1285 | DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0, cs_rp ), | |
98a3f706 | 1286 | }; |
1287 | ||
2c6eb096 | 1288 | static const typeinfo typeinfo_unknown= |
1289 | DEEP_TYPE(unknown,0, "unknown",byteblock,pa_opaque, 0, cs_opaque ); | |
1290 | ||
f759e52e | 1291 | const typeinfo *adns__findtype(adns_rrtype type) { |
1292 | const typeinfo *begin, *end, *mid; | |
98a3f706 | 1293 | |
2c6eb096 | 1294 | if (type & adns_r_unknown) return &typeinfo_unknown; |
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 | } |