98db6da3 |
1 | /* |
2 | * types.c |
3 | * - RR-type-specific code, and the machinery to call it |
4 | */ |
5 | /* |
a79ac5ba |
6 | * This file is |
7 | * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk> |
8 | * |
9 | * It is part of adns, which is |
89435c42 |
10 | * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk> |
c6826df6 |
11 | * Copyright (C) 1999-2000 Tony Finch <dot@dotat.at> |
98db6da3 |
12 | * |
13 | * This program is free software; you can redistribute it and/or modify |
14 | * it under the terms of the GNU General Public License as published by |
15 | * the Free Software Foundation; either version 2, or (at your option) |
16 | * any later version. |
17 | * |
18 | * This program is distributed in the hope that it will be useful, |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
21 | * GNU General Public License for more details. |
22 | * |
23 | * You should have received a copy of the GNU General Public License |
24 | * along with this program; if not, write to the Free Software Foundation, |
25 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
26 | */ |
5c596e4d |
27 | |
d4c7b0b1 |
28 | #include <stdlib.h> |
29 | |
b6b3ac61 |
30 | #include <sys/types.h> |
763d28b9 |
31 | #include <sys/socket.h> |
32 | #include <netinet/in.h> |
1e9efa71 |
33 | #include <arpa/inet.h> |
34 | |
5c596e4d |
35 | #include "internal.h" |
36 | |
9c344a42 |
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) |
26eb6bdc |
41 | |
14180727 |
42 | /* |
43 | * order of sections: |
44 | * |
61093792 |
45 | * _string (pap) |
14180727 |
46 | * _textdata, _qstring (csp) |
47 | * _str (mf,cs) |
61093792 |
48 | * _intstr (mf,csp,cs) |
14180727 |
49 | * _manyistr (mf,cs) |
50 | * _txt (pa) |
51 | * _inaddr (pa,dip,di) |
52 | * _addr (pa,di,csp,cs) |
53 | * _domain (pap) |
54 | * _host_raw (pa) |
55 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs) |
56 | * _mx_raw (pa,di) |
57 | * _mx (pa,di) |
58 | * _inthostaddr (mf,cs) |
cd1bde2f |
59 | * _ptr (pa) |
61093792 |
60 | * _strpair (mf,cs) |
61 | * _intstrpair (mf,cs) |
62 | * _hinfo (pa) |
c2875680 |
63 | * _mailbox (pap +pap_mailbox822) |
61093792 |
64 | * _rp (pa) |
65 | * _soa (pa,mf,cs) |
59d05d1c |
66 | * _srv* (qdpl,(pap),pa,mf,di,(csp),cs,postsort) |
7d0aaee4 |
67 | * _byteblock (mf) |
68 | * _opaque (pa,cs) |
14180727 |
69 | * _flat (mf) |
70 | * |
71 | * within each section: |
2248cdf4 |
72 | * qdpl_* |
14180727 |
73 | * pap_* |
74 | * pa_* |
75 | * dip_* |
76 | * di_* |
77 | * mfp_* |
78 | * mf_* |
79 | * csp_* |
80 | * cs_* |
59d05d1c |
81 | * postsort_* |
14180727 |
82 | */ |
83 | |
84 | /* |
0872e289 |
85 | * _qstring (pap,csp) |
14180727 |
86 | */ |
87 | |
0872e289 |
88 | static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max, |
61093792 |
89 | int *len_r, char **str_r) { |
90 | /* Neither len_r nor str_r may be null. |
91 | * End of datagram (overrun) is indicated by returning adns_s_invaliddata; |
92 | */ |
93 | const byte *dgram= pai->dgram; |
94 | int l, cbyte; |
95 | char *str; |
96 | |
97 | cbyte= *cbyte_io; |
98 | |
99 | if (cbyte >= max) return adns_s_invaliddata; |
100 | GET_B(cbyte,l); |
101 | if (cbyte+l > max) return adns_s_invaliddata; |
102 | |
103 | str= adns__alloc_interim(pai->qu, l+1); |
104 | if (!str) R_NOMEM; |
105 | |
106 | str[l]= 0; |
107 | memcpy(str,dgram+cbyte,l); |
108 | |
109 | *len_r= l; |
110 | *str_r= str; |
111 | *cbyte_io= cbyte+l; |
112 | |
113 | return adns_s_ok; |
114 | } |
115 | |
0872e289 |
116 | static adns_status csp_qstring(vbuf *vb, const char *dp, int len) { |
14180727 |
117 | unsigned char ch; |
118 | char buf[10]; |
119 | int cn; |
120 | |
121 | CSP_ADDSTR("\""); |
122 | for (cn=0; cn<len; cn++) { |
123 | ch= *dp++; |
0872e289 |
124 | if (ch == '\\') { |
61093792 |
125 | CSP_ADDSTR("\\\\"); |
0872e289 |
126 | } else if (ch == '"') { |
127 | CSP_ADDSTR("\\\""); |
128 | } else if (ch >= 32 && ch <= 126) { |
129 | if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM; |
14180727 |
130 | } else { |
61093792 |
131 | sprintf(buf,"\\x%02x",ch); |
14180727 |
132 | CSP_ADDSTR(buf); |
133 | } |
134 | } |
135 | CSP_ADDSTR("\""); |
136 | |
137 | return adns_s_ok; |
138 | } |
139 | |
14180727 |
140 | /* |
0872e289 |
141 | * _str (mf) |
14180727 |
142 | */ |
143 | |
144 | static void mf_str(adns_query qu, void *datap) { |
145 | char **rrp= datap; |
146 | |
147 | adns__makefinal_str(qu,rrp); |
148 | } |
149 | |
14180727 |
150 | /* |
0872e289 |
151 | * _intstr (mf) |
14180727 |
152 | */ |
153 | |
154 | static void mf_intstr(adns_query qu, void *datap) { |
155 | adns_rr_intstr *rrp= datap; |
156 | |
157 | adns__makefinal_str(qu,&rrp->str); |
158 | } |
159 | |
14180727 |
160 | /* |
0872e289 |
161 | * _manyistr (mf) |
14180727 |
162 | */ |
163 | |
164 | static void mf_manyistr(adns_query qu, void *datap) { |
165 | adns_rr_intstr **rrp= datap; |
166 | adns_rr_intstr *te, *table; |
167 | void *tablev; |
168 | int tc; |
169 | |
170 | for (tc=0, te= *rrp; te->i >= 0; te++, tc++); |
171 | tablev= *rrp; |
172 | adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1)); |
173 | *rrp= table= tablev; |
174 | for (te= *rrp; te->i >= 0; te++) |
175 | adns__makefinal_str(qu,&te->str); |
176 | } |
177 | |
14180727 |
178 | /* |
0872e289 |
179 | * _txt (pa,cs) |
14180727 |
180 | */ |
181 | |
9c344a42 |
182 | static adns_status pa_txt(const parseinfo *pai, int cbyte, |
183 | int max, void *datap) { |
14180727 |
184 | adns_rr_intstr **rrp= datap, *table, *te; |
185 | const byte *dgram= pai->dgram; |
186 | int ti, tc, l, startbyte; |
61093792 |
187 | adns_status st; |
14180727 |
188 | |
189 | startbyte= cbyte; |
190 | if (cbyte >= max) return adns_s_invaliddata; |
191 | tc= 0; |
192 | while (cbyte < max) { |
193 | GET_B(cbyte,l); |
194 | cbyte+= l; |
61093792 |
195 | tc++; |
14180727 |
196 | } |
0872e289 |
197 | if (cbyte != max || !tc) return adns_s_invaliddata; |
14180727 |
198 | |
199 | table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1)); |
200 | if (!table) R_NOMEM; |
201 | |
202 | for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) { |
0872e289 |
203 | st= pap_qstring(pai, &cbyte, max, &te->i, &te->str); |
61093792 |
204 | if (st) return st; |
14180727 |
205 | } |
206 | assert(cbyte == max); |
207 | |
208 | te->i= -1; |
209 | te->str= 0; |
210 | |
211 | *rrp= table; |
212 | return adns_s_ok; |
cd363ffd |
213 | } |
214 | |
0872e289 |
215 | static adns_status cs_txt(vbuf *vb, const void *datap) { |
216 | const adns_rr_intstr *const *rrp= datap; |
217 | const adns_rr_intstr *current; |
218 | adns_status st; |
219 | int spc; |
220 | |
221 | for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) { |
222 | if (spc) CSP_ADDSTR(" "); |
223 | st= csp_qstring(vb,current->str,current->i); if (st) return st; |
224 | } |
225 | return adns_s_ok; |
226 | } |
227 | |
228 | /* |
229 | * _hinfo (cs) |
230 | */ |
231 | |
232 | static adns_status cs_hinfo(vbuf *vb, const void *datap) { |
233 | const adns_rr_intstrpair *rrp= datap; |
234 | adns_status st; |
235 | |
236 | st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st; |
237 | CSP_ADDSTR(" "); |
238 | st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st; |
239 | return adns_s_ok; |
240 | } |
241 | |
14180727 |
242 | /* |
243 | * _inaddr (pa,dip,di) |
244 | */ |
245 | |
9c344a42 |
246 | static adns_status pa_inaddr(const parseinfo *pai, int cbyte, |
247 | int max, void *datap) { |
f2ad23ee |
248 | struct in_addr *storeto= datap; |
68b7fc5f |
249 | |
250 | if (max-cbyte != 4) return adns_s_invaliddata; |
26eb6bdc |
251 | memcpy(storeto, pai->dgram + cbyte, 4); |
68b7fc5f |
252 | return adns_s_ok; |
253 | } |
254 | |
8c3aa944 |
255 | static int search_sortlist(adns_state ads, struct in_addr ad) { |
256 | const struct sortlist *slp; |
257 | int i; |
258 | |
259 | for (i=0, slp=ads->sortlist; |
9c344a42 |
260 | i<ads->nsortlist && |
261 | !((ad.s_addr & slp->mask.s_addr) == slp->base.s_addr); |
8c3aa944 |
262 | i++, slp++); |
263 | return i; |
14180727 |
264 | } |
265 | |
8c3aa944 |
266 | static int dip_inaddr(adns_state ads, struct in_addr a, struct in_addr b) { |
267 | int ai, bi; |
268 | |
269 | if (!ads->nsortlist) return 0; |
270 | |
271 | ai= search_sortlist(ads,a); |
272 | bi= search_sortlist(ads,b); |
273 | return bi<ai; |
274 | } |
275 | |
9c344a42 |
276 | static int di_inaddr(adns_state ads, |
277 | const void *datap_a, const void *datap_b) { |
f2ad23ee |
278 | const struct in_addr *ap= datap_a, *bp= datap_b; |
279 | |
8c3aa944 |
280 | return dip_inaddr(ads,*ap,*bp); |
f2ad23ee |
281 | } |
282 | |
283 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { |
284 | const struct in_addr *rrp= datap, rr= *rrp; |
1e9efa71 |
285 | const char *ia; |
286 | |
f2ad23ee |
287 | ia= inet_ntoa(rr); assert(ia); |
26eb6bdc |
288 | CSP_ADDSTR(ia); |
289 | return adns_s_ok; |
1e9efa71 |
290 | } |
68b7fc5f |
291 | |
14180727 |
292 | /* |
293 | * _addr (pa,di,csp,cs) |
294 | */ |
295 | |
9c344a42 |
296 | static adns_status pa_addr(const parseinfo *pai, int cbyte, |
297 | int max, void *datap) { |
bc01473e |
298 | adns_rr_addr *storeto= datap; |
26eb6bdc |
299 | const byte *dgram= pai->dgram; |
a1d2d0ed |
300 | |
cd363ffd |
301 | if (max-cbyte != 4) return adns_s_invaliddata; |
302 | storeto->len= sizeof(storeto->addr.inet); |
303 | memset(&storeto->addr,0,sizeof(storeto->addr.inet)); |
304 | storeto->addr.inet.sin_family= AF_INET; |
cd363ffd |
305 | memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4); |
306 | return adns_s_ok; |
307 | } |
308 | |
8c3aa944 |
309 | static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) { |
bc01473e |
310 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
cd363ffd |
311 | |
26eb6bdc |
312 | assert(ap->addr.sa.sa_family == AF_INET); |
8c3aa944 |
313 | return dip_inaddr(ads, ap->addr.inet.sin_addr, bp->addr.inet.sin_addr); |
cd363ffd |
314 | } |
315 | |
8c3aa944 |
316 | static int div_addr(void *context, const void *datap_a, const void *datap_b) { |
317 | const adns_state ads= context; |
318 | |
319 | return di_addr(ads, datap_a, datap_b); |
320 | } |
321 | |
bc01473e |
322 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
cd363ffd |
323 | const char *ia; |
324 | static char buf[30]; |
325 | |
326 | switch (rrp->addr.inet.sin_family) { |
327 | case AF_INET: |
0872e289 |
328 | CSP_ADDSTR("INET "); |
cd363ffd |
329 | ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia); |
26eb6bdc |
330 | CSP_ADDSTR(ia); |
cd363ffd |
331 | break; |
332 | default: |
333 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); |
26eb6bdc |
334 | CSP_ADDSTR(buf); |
cd363ffd |
335 | break; |
336 | } |
337 | return adns_s_ok; |
338 | } |
339 | |
26eb6bdc |
340 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
bc01473e |
341 | const adns_rr_addr *rrp= datap; |
26eb6bdc |
342 | |
343 | return csp_addr(vb,rrp); |
344 | } |
345 | |
14180727 |
346 | /* |
0872e289 |
347 | * _domain (pap,csp,cs) |
348 | * _dom_raw (pa) |
14180727 |
349 | */ |
350 | |
26eb6bdc |
351 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
352 | char **domain_r, parsedomain_flags flags) { |
f2ad23ee |
353 | adns_status st; |
354 | char *dm; |
355 | |
26eb6bdc |
356 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
357 | pai->dgram,pai->dglen, cbyte_io, max); |
f2ad23ee |
358 | if (st) return st; |
26eb6bdc |
359 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
f2ad23ee |
360 | |
26eb6bdc |
361 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
362 | if (!dm) R_NOMEM; |
f2ad23ee |
363 | |
26eb6bdc |
364 | dm[pai->qu->vb.used]= 0; |
365 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); |
f2ad23ee |
366 | |
367 | *domain_r= dm; |
368 | return adns_s_ok; |
369 | } |
370 | |
0872e289 |
371 | static adns_status csp_domain(vbuf *vb, const char *domain) { |
372 | CSP_ADDSTR(domain); |
373 | if (!*domain) CSP_ADDSTR("."); |
374 | return adns_s_ok; |
375 | } |
376 | |
377 | static adns_status cs_domain(vbuf *vb, const void *datap) { |
378 | const char *const *domainp= datap; |
379 | return csp_domain(vb,*domainp); |
380 | } |
381 | |
9c344a42 |
382 | static adns_status pa_dom_raw(const parseinfo *pai, int cbyte, |
383 | int max, void *datap) { |
0872e289 |
384 | char **rrp= datap; |
385 | adns_status st; |
386 | |
387 | st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok); |
388 | if (st) return st; |
389 | |
390 | if (cbyte != max) return adns_s_invaliddata; |
391 | return adns_s_ok; |
392 | } |
393 | |
14180727 |
394 | /* |
395 | * _host_raw (pa) |
396 | */ |
397 | |
9c344a42 |
398 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, |
399 | int max, void *datap) { |
f2ad23ee |
400 | char **rrp= datap; |
cfdca685 |
401 | adns_status st; |
1e9efa71 |
402 | |
26eb6bdc |
403 | st= pap_domain(pai, &cbyte, max, rrp, |
404 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
f2ad23ee |
405 | if (st) return st; |
406 | |
407 | if (cbyte != max) return adns_s_invaliddata; |
408 | return adns_s_ok; |
409 | } |
cfdca685 |
410 | |
14180727 |
411 | /* |
bc01473e |
412 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs) |
14180727 |
413 | */ |
a1d2d0ed |
414 | |
26eb6bdc |
415 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
416 | int *cbyte_io, int count, int dmstart) { |
417 | int rri, naddrs; |
a1d2d0ed |
418 | int type, class, rdlen, rdstart, ownermatched; |
2c7b101b |
419 | unsigned long ttl; |
26eb6bdc |
420 | adns_status st; |
a1d2d0ed |
421 | |
26eb6bdc |
422 | for (rri=0, naddrs=-1; rri<count; rri++) { |
9c344a42 |
423 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, |
424 | pai->dglen, cbyte_io, |
2c7b101b |
425 | &type, &class, &ttl, &rdlen, &rdstart, |
26eb6bdc |
426 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
a1d2d0ed |
427 | if (st) return st; |
26eb6bdc |
428 | if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) { |
429 | if (naddrs>0) break; else continue; |
430 | } |
431 | if (naddrs == -1) { |
432 | naddrs= 0; |
a1d2d0ed |
433 | } |
9c344a42 |
434 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_rr_addr))) |
435 | R_NOMEM; |
2c7b101b |
436 | adns__update_expires(pai->qu,ttl,pai->now); |
bc01473e |
437 | st= pa_addr(pai, rdstart,rdstart+rdlen, |
438 | pai->qu->vb.buf + naddrs*sizeof(adns_rr_addr)); |
a1d2d0ed |
439 | if (st) return st; |
26eb6bdc |
440 | naddrs++; |
a1d2d0ed |
441 | } |
26eb6bdc |
442 | if (naddrs >= 0) { |
bc01473e |
443 | ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_rr_addr)); |
26eb6bdc |
444 | if (!ha->addrs) R_NOMEM; |
bc01473e |
445 | memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_rr_addr)); |
26eb6bdc |
446 | ha->naddrs= naddrs; |
a1d2d0ed |
447 | ha->astatus= adns_s_ok; |
26eb6bdc |
448 | |
8c3aa944 |
449 | adns__isort(ha->addrs, naddrs, sizeof(adns_rr_addr), pai->qu->vb.buf, |
450 | div_addr, pai->ads); |
a1d2d0ed |
451 | } |
452 | return adns_s_ok; |
453 | } |
454 | |
bc01473e |
455 | static void icb_hostaddr(adns_query parent, adns_query child) { |
bc01473e |
456 | adns_answer *cans= child->answer; |
cd1bde2f |
457 | adns_rr_hostaddr *rrp= child->ctx.info.hostaddr; |
cb32030b |
458 | adns_state ads= parent->ads; |
0872e289 |
459 | adns_status st; |
bc01473e |
460 | |
0872e289 |
461 | st= cans->status; |
462 | rrp->astatus= st; |
463 | rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs; |
bc01473e |
464 | rrp->addrs= cans->rrs.addr; |
9c344a42 |
465 | adns__transfer_interim(child, parent, rrp->addrs, |
466 | rrp->naddrs*sizeof(adns_rr_addr)); |
cd1bde2f |
467 | |
cb32030b |
468 | if (parent->children.head) { |
469 | LIST_LINK_TAIL(ads->childw,parent); |
470 | } else { |
471 | adns__query_done(parent); |
472 | } |
bc01473e |
473 | } |
474 | |
26eb6bdc |
475 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
476 | int max, adns_rr_hostaddr *rrp) { |
a1d2d0ed |
477 | adns_status st; |
478 | int dmstart, cbyte; |
ba1ddf08 |
479 | qcontext ctx; |
480 | int id; |
481 | adns_query nqu; |
59fbb06a |
482 | adns_queryflags nflags; |
a1d2d0ed |
483 | |
484 | dmstart= cbyte= *cbyte_io; |
26eb6bdc |
485 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
486 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
a1d2d0ed |
487 | if (st) return st; |
488 | *cbyte_io= cbyte; |
489 | |
490 | rrp->astatus= adns_s_ok; |
491 | rrp->naddrs= -1; |
492 | rrp->addrs= 0; |
493 | |
26eb6bdc |
494 | cbyte= pai->nsstart; |
a1d2d0ed |
495 | |
26eb6bdc |
496 | st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart); |
a1d2d0ed |
497 | if (st) return st; |
498 | if (rrp->naddrs != -1) return adns_s_ok; |
499 | |
26eb6bdc |
500 | st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart); |
a1d2d0ed |
501 | if (st) return st; |
502 | if (rrp->naddrs != -1) return adns_s_ok; |
26eb6bdc |
503 | |
ba1ddf08 |
504 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
505 | pai->dgram, pai->dglen, dmstart, |
506 | adns_r_addr, adns_qf_quoteok_query); |
507 | if (st) return st; |
bc01473e |
508 | |
cd1bde2f |
509 | ctx.ext= 0; |
510 | ctx.callback= icb_hostaddr; |
511 | ctx.info.hostaddr= rrp; |
59fbb06a |
512 | |
513 | nflags= adns_qf_quoteok_query; |
514 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; |
515 | |
ba1ddf08 |
516 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
7e6a84a1 |
517 | &pai->qu->vb, id, nflags, pai->now, &ctx); |
ba1ddf08 |
518 | if (st) return st; |
519 | |
520 | nqu->parent= pai->qu; |
521 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); |
26eb6bdc |
522 | |
523 | return adns_s_ok; |
a1d2d0ed |
524 | } |
525 | |
9c344a42 |
526 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, |
527 | int max, void *datap) { |
26eb6bdc |
528 | adns_rr_hostaddr *rrp= datap; |
a1d2d0ed |
529 | adns_status st; |
a1d2d0ed |
530 | |
26eb6bdc |
531 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
a1d2d0ed |
532 | if (st) return st; |
533 | if (cbyte != max) return adns_s_invaliddata; |
534 | |
26eb6bdc |
535 | return adns_s_ok; |
536 | } |
a1d2d0ed |
537 | |
9c344a42 |
538 | static int dip_hostaddr(adns_state ads, |
539 | const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { |
26eb6bdc |
540 | if (ap->astatus != bp->astatus) return ap->astatus; |
541 | if (ap->astatus) return 0; |
a1d2d0ed |
542 | |
26eb6bdc |
543 | assert(ap->addrs[0].addr.sa.sa_family == AF_INET); |
544 | assert(bp->addrs[0].addr.sa.sa_family == AF_INET); |
8c3aa944 |
545 | return dip_inaddr(ads, |
546 | ap->addrs[0].addr.inet.sin_addr, |
547 | bp->addrs[0].addr.inet.sin_addr); |
26eb6bdc |
548 | } |
549 | |
9c344a42 |
550 | static int di_hostaddr(adns_state ads, |
551 | const void *datap_a, const void *datap_b) { |
26eb6bdc |
552 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
553 | |
8c3aa944 |
554 | return dip_hostaddr(ads, ap,bp); |
a1d2d0ed |
555 | } |
556 | |
14180727 |
557 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
558 | void *tablev; |
f2ad23ee |
559 | |
14180727 |
560 | adns__makefinal_str(qu,&rrp->host); |
561 | tablev= rrp->addrs; |
562 | adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs)); |
563 | rrp->addrs= tablev; |
f2ad23ee |
564 | } |
565 | |
14180727 |
566 | static void mf_hostaddr(adns_query qu, void *datap) { |
567 | adns_rr_hostaddr *rrp= datap; |
f2ad23ee |
568 | |
14180727 |
569 | mfp_hostaddr(qu,rrp); |
f2ad23ee |
570 | } |
571 | |
26eb6bdc |
572 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
0fb18816 |
573 | const char *errstr; |
26eb6bdc |
574 | adns_status st; |
9e50e3ac |
575 | char buf[20]; |
26eb6bdc |
576 | int i; |
577 | |
0fb18816 |
578 | st= csp_domain(vb,rrp->host); if (st) return st; |
26eb6bdc |
579 | |
0872e289 |
580 | CSP_ADDSTR(" "); |
9e50e3ac |
581 | CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus)); |
582 | |
583 | sprintf(buf," %d ",rrp->astatus); |
584 | CSP_ADDSTR(buf); |
0fb18816 |
585 | |
9e50e3ac |
586 | CSP_ADDSTR(adns_errabbrev(rrp->astatus)); |
0fb18816 |
587 | CSP_ADDSTR(" "); |
9e50e3ac |
588 | |
0fb18816 |
589 | errstr= adns_strerror(rrp->astatus); |
590 | st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st; |
0872e289 |
591 | |
592 | if (rrp->naddrs >= 0) { |
593 | CSP_ADDSTR(" ("); |
594 | for (i=0; i<rrp->naddrs; i++) { |
595 | CSP_ADDSTR(" "); |
26eb6bdc |
596 | st= csp_addr(vb,&rrp->addrs[i]); |
597 | } |
0872e289 |
598 | CSP_ADDSTR(" )"); |
599 | } else { |
600 | CSP_ADDSTR(" ?"); |
26eb6bdc |
601 | } |
602 | return adns_s_ok; |
603 | } |
604 | |
605 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { |
606 | const adns_rr_hostaddr *rrp= datap; |
607 | |
608 | return csp_hostaddr(vb,rrp); |
609 | } |
610 | |
14180727 |
611 | /* |
612 | * _mx_raw (pa,di) |
613 | */ |
26eb6bdc |
614 | |
9c344a42 |
615 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, |
616 | int max, void *datap) { |
14180727 |
617 | const byte *dgram= pai->dgram; |
618 | adns_rr_intstr *rrp= datap; |
619 | adns_status st; |
620 | int pref; |
26eb6bdc |
621 | |
14180727 |
622 | if (cbyte+2 > max) return adns_s_invaliddata; |
623 | GET_W(cbyte,pref); |
624 | rrp->i= pref; |
625 | st= pap_domain(pai, &cbyte, max, &rrp->str, |
626 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
627 | if (st) return st; |
26eb6bdc |
628 | |
14180727 |
629 | if (cbyte != max) return adns_s_invaliddata; |
630 | return adns_s_ok; |
631 | } |
26eb6bdc |
632 | |
8c3aa944 |
633 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
14180727 |
634 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
635 | |
636 | if (ap->i < bp->i) return 0; |
637 | if (ap->i > bp->i) return 1; |
638 | return 0; |
26eb6bdc |
639 | } |
640 | |
14180727 |
641 | /* |
642 | * _mx (pa,di) |
643 | */ |
26eb6bdc |
644 | |
9c344a42 |
645 | static adns_status pa_mx(const parseinfo *pai, int cbyte, |
646 | int max, void *datap) { |
14180727 |
647 | const byte *dgram= pai->dgram; |
648 | adns_rr_inthostaddr *rrp= datap; |
649 | adns_status st; |
650 | int pref; |
651 | |
652 | if (cbyte+2 > max) return adns_s_invaliddata; |
653 | GET_W(cbyte,pref); |
654 | rrp->i= pref; |
655 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); |
656 | if (st) return st; |
657 | |
658 | if (cbyte != max) return adns_s_invaliddata; |
659 | return adns_s_ok; |
660 | } |
661 | |
8c3aa944 |
662 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
14180727 |
663 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
664 | |
665 | if (ap->i < bp->i) return 0; |
666 | if (ap->i > bp->i) return 1; |
8c3aa944 |
667 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
26eb6bdc |
668 | } |
669 | |
14180727 |
670 | /* |
671 | * _inthostaddr (mf,cs) |
672 | */ |
673 | |
26eb6bdc |
674 | static void mf_inthostaddr(adns_query qu, void *datap) { |
675 | adns_rr_inthostaddr *rrp= datap; |
676 | |
677 | mfp_hostaddr(qu,&rrp->ha); |
678 | } |
679 | |
14180727 |
680 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
681 | const adns_rr_inthostaddr *rrp= datap; |
682 | char buf[10]; |
f2ad23ee |
683 | |
14180727 |
684 | sprintf(buf,"%u ",rrp->i); |
685 | CSP_ADDSTR(buf); |
686 | |
687 | return csp_hostaddr(vb,&rrp->ha); |
cfdca685 |
688 | } |
689 | |
14180727 |
690 | /* |
0872e289 |
691 | * _inthost (cs) |
692 | */ |
693 | |
694 | static adns_status cs_inthost(vbuf *vb, const void *datap) { |
695 | const adns_rr_intstr *rrp= datap; |
696 | char buf[10]; |
697 | |
698 | sprintf(buf,"%u ",rrp->i); |
699 | CSP_ADDSTR(buf); |
700 | return csp_domain(vb,rrp->str); |
701 | } |
702 | |
703 | /* |
cd1bde2f |
704 | * _ptr (pa, +icb_ptr) |
705 | */ |
706 | |
707 | static void icb_ptr(adns_query parent, adns_query child) { |
708 | adns_answer *cans= child->answer; |
709 | const adns_rr_addr *queried, *found; |
cb32030b |
710 | adns_state ads= parent->ads; |
cd1bde2f |
711 | int i; |
712 | |
713 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { |
714 | adns__query_fail(parent,adns_s_inconsistent); |
715 | return; |
716 | } else if (cans->status) { |
717 | adns__query_fail(parent,cans->status); |
718 | return; |
719 | } |
720 | |
721 | queried= &parent->ctx.info.ptr_parent_addr; |
722 | for (i=0, found=cans->rrs.addr; i<cans->nrrs; i++, found++) { |
723 | if (queried->len == found->len && |
724 | !memcmp(&queried->addr,&found->addr,queried->len)) { |
cb32030b |
725 | if (!parent->children.head) { |
726 | adns__query_done(parent); |
727 | return; |
728 | } else { |
729 | LIST_LINK_TAIL(ads->childw,parent); |
730 | return; |
731 | } |
cd1bde2f |
732 | } |
733 | } |
734 | |
735 | adns__query_fail(parent,adns_s_inconsistent); |
736 | } |
737 | |
9c344a42 |
738 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, |
739 | int max, void *datap) { |
cd1bde2f |
740 | static const char *(expectdomain[])= { DNS_INADDR_ARPA }; |
741 | |
742 | char **rrp= datap; |
743 | adns_status st; |
744 | adns_rr_addr *ap; |
745 | findlabel_state fls; |
746 | char *ep; |
747 | byte ipv[4]; |
748 | char labbuf[4]; |
749 | int cbyte, i, lablen, labstart, l, id; |
750 | adns_query nqu; |
751 | qcontext ctx; |
752 | |
753 | cbyte= dmstart; |
754 | st= pap_domain(pai, &cbyte, max, rrp, |
755 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
756 | if (st) return st; |
757 | if (cbyte != max) return adns_s_invaliddata; |
758 | |
759 | ap= &pai->qu->ctx.info.ptr_parent_addr; |
760 | if (!ap->len) { |
761 | adns__findlabel_start(&fls, pai->ads, -1, pai->qu, |
762 | pai->qu->query_dgram, pai->qu->query_dglen, |
763 | pai->qu->query_dglen, DNS_HDRSIZE, 0); |
764 | for (i=0; i<4; i++) { |
765 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); |
9b86645c |
766 | if (lablen<=0 || lablen>3) return adns_s_querydomainwrong; |
9c344a42 |
767 | memcpy(labbuf, pai->qu->query_dgram + labstart, lablen); |
768 | labbuf[lablen]= 0; |
769 | ipv[3-i]= strtoul(labbuf,&ep,10); |
770 | if (*ep) return adns_s_querydomainwrong; |
cd1bde2f |
771 | if (lablen>1 && pai->qu->query_dgram[labstart]=='0') |
9b86645c |
772 | return adns_s_querydomainwrong; |
cd1bde2f |
773 | } |
774 | for (i=0; i<sizeof(expectdomain)/sizeof(*expectdomain); i++) { |
775 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); |
776 | l= strlen(expectdomain[i]); |
9c344a42 |
777 | if (lablen != l || |
778 | memcmp(pai->qu->query_dgram + labstart, expectdomain[i], l)) |
9b86645c |
779 | return adns_s_querydomainwrong; |
cd1bde2f |
780 | } |
781 | st= adns__findlabel_next(&fls,&lablen,0); assert(!st); |
9b86645c |
782 | if (lablen) return adns_s_querydomainwrong; |
cd1bde2f |
783 | |
784 | ap->len= sizeof(struct sockaddr_in); |
785 | memset(&ap->addr,0,sizeof(ap->addr.inet)); |
786 | ap->addr.inet.sin_family= AF_INET; |
787 | ap->addr.inet.sin_addr.s_addr= |
788 | htonl((ipv[0]<<24) | (ipv[1]<<16) | (ipv[2]<<8) | (ipv[3])); |
789 | } |
790 | |
791 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
792 | pai->dgram, pai->dglen, dmstart, |
793 | adns_r_addr, adns_qf_quoteok_query); |
794 | if (st) return st; |
795 | |
796 | ctx.ext= 0; |
797 | ctx.callback= icb_ptr; |
798 | memset(&ctx.info,0,sizeof(ctx.info)); |
799 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
800 | &pai->qu->vb, id, |
7e6a84a1 |
801 | adns_qf_quoteok_query, pai->now, &ctx); |
cd1bde2f |
802 | if (st) return st; |
803 | |
804 | nqu->parent= pai->qu; |
805 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); |
cd1bde2f |
806 | return adns_s_ok; |
807 | } |
808 | |
809 | /* |
0872e289 |
810 | * _strpair (mf) |
61093792 |
811 | */ |
812 | |
813 | static void mf_strpair(adns_query qu, void *datap) { |
814 | adns_rr_strpair *rrp= datap; |
815 | |
816 | adns__makefinal_str(qu,&rrp->array[0]); |
817 | adns__makefinal_str(qu,&rrp->array[1]); |
818 | } |
819 | |
61093792 |
820 | /* |
0872e289 |
821 | * _intstrpair (mf) |
61093792 |
822 | */ |
823 | |
824 | static void mf_intstrpair(adns_query qu, void *datap) { |
825 | adns_rr_intstrpair *rrp= datap; |
826 | |
827 | adns__makefinal_str(qu,&rrp->array[0].str); |
828 | adns__makefinal_str(qu,&rrp->array[1].str); |
829 | } |
830 | |
61093792 |
831 | /* |
832 | * _hinfo (pa) |
833 | */ |
834 | |
9c344a42 |
835 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, |
836 | int max, void *datap) { |
61093792 |
837 | adns_rr_intstrpair *rrp= datap; |
838 | adns_status st; |
839 | int i; |
840 | |
841 | for (i=0; i<2; i++) { |
0872e289 |
842 | st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
61093792 |
843 | if (st) return st; |
844 | } |
845 | |
846 | if (cbyte != max) return adns_s_invaliddata; |
847 | |
848 | return adns_s_ok; |
849 | } |
850 | |
851 | /* |
0872e289 |
852 | * _mailbox (pap,cs) |
61093792 |
853 | */ |
854 | |
9c344a42 |
855 | static adns_status pap_mailbox822(const parseinfo *pai, |
856 | int *cbyte_io, int max, char **mb_r) { |
6f2c243f |
857 | int lablen, labstart, i, needquote, c, r, neednorm; |
858 | const unsigned char *p; |
859 | char *str; |
860 | findlabel_state fls; |
861 | adns_status st; |
862 | vbuf *vb; |
863 | |
864 | vb= &pai->qu->vb; |
865 | vb->used= 0; |
866 | adns__findlabel_start(&fls, pai->ads, |
867 | -1, pai->qu, |
868 | pai->dgram, pai->dglen, max, |
869 | *cbyte_io, cbyte_io); |
870 | st= adns__findlabel_next(&fls,&lablen,&labstart); |
871 | if (!lablen) { |
0872e289 |
872 | adns__vbuf_appendstr(vb,"."); |
6f2c243f |
873 | goto x_ok; |
874 | } |
875 | |
876 | neednorm= 1; |
877 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) { |
878 | c= *p++; |
879 | if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata; |
880 | if (c == '.' && !neednorm) neednorm= 1; |
67ca39c8 |
881 | else if (c==' ' || c>=127 || ctype_822special(c)) needquote++; |
6f2c243f |
882 | else neednorm= 0; |
883 | } |
884 | |
885 | if (needquote || neednorm) { |
886 | r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM; |
887 | adns__vbuf_appendq(vb,"\"",1); |
888 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) { |
889 | c= *p; |
0872e289 |
890 | if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1); |
6f2c243f |
891 | adns__vbuf_appendq(vb,p,1); |
892 | } |
893 | adns__vbuf_appendq(vb,"\"",1); |
894 | } else { |
895 | r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM; |
896 | } |
897 | |
898 | r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM; |
899 | |
900 | st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram); |
901 | if (st) return st; |
902 | |
903 | x_ok: |
904 | str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM; |
905 | memcpy(str,vb->buf,vb->used); |
906 | str[vb->used]= 0; |
907 | *mb_r= str; |
908 | return adns_s_ok; |
61093792 |
909 | } |
910 | |
c2875680 |
911 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
912 | char **mb_r) { |
7d0aaee4 |
913 | if (pai->qu->typei->typekey & adns__qtf_mail822) { |
c2875680 |
914 | return pap_mailbox822(pai, cbyte_io, max, mb_r); |
915 | } else { |
0872e289 |
916 | return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok); |
c2875680 |
917 | } |
918 | } |
919 | |
0872e289 |
920 | static adns_status csp_mailbox(vbuf *vb, const char *mailbox) { |
921 | return csp_domain(vb,mailbox); |
922 | } |
923 | |
61093792 |
924 | /* |
0872e289 |
925 | * _rp (pa,cs) |
61093792 |
926 | */ |
927 | |
9c344a42 |
928 | static adns_status pa_rp(const parseinfo *pai, int cbyte, |
929 | int max, void *datap) { |
61093792 |
930 | adns_rr_strpair *rrp= datap; |
931 | adns_status st; |
932 | |
933 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); |
934 | if (st) return st; |
935 | |
936 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); |
937 | if (st) return st; |
938 | |
939 | if (cbyte != max) return adns_s_invaliddata; |
940 | return adns_s_ok; |
941 | } |
942 | |
0872e289 |
943 | static adns_status cs_rp(vbuf *vb, const void *datap) { |
944 | const adns_rr_strpair *rrp= datap; |
945 | adns_status st; |
946 | |
947 | st= csp_mailbox(vb,rrp->array[0]); if (st) return st; |
948 | CSP_ADDSTR(" "); |
949 | st= csp_domain(vb,rrp->array[1]); if (st) return st; |
950 | |
951 | return adns_s_ok; |
952 | } |
953 | |
61093792 |
954 | /* |
955 | * _soa (pa,mf,cs) |
956 | */ |
957 | |
9c344a42 |
958 | static adns_status pa_soa(const parseinfo *pai, int cbyte, |
959 | int max, void *datap) { |
61093792 |
960 | adns_rr_soa *rrp= datap; |
961 | const byte *dgram= pai->dgram; |
962 | adns_status st; |
963 | int msw, lsw, i; |
964 | |
965 | st= pap_domain(pai, &cbyte, max, &rrp->mname, |
966 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
967 | if (st) return st; |
968 | |
969 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); |
970 | if (st) return st; |
971 | |
972 | if (cbyte+20 != max) return adns_s_invaliddata; |
973 | |
974 | for (i=0; i<5; i++) { |
975 | GET_W(cbyte,msw); |
976 | GET_W(cbyte,lsw); |
977 | (&rrp->serial)[i]= (msw<<16) | lsw; |
978 | } |
979 | |
980 | return adns_s_ok; |
981 | } |
982 | |
983 | static void mf_soa(adns_query qu, void *datap) { |
984 | adns_rr_soa *rrp= datap; |
985 | |
986 | adns__makefinal_str(qu,&rrp->mname); |
987 | adns__makefinal_str(qu,&rrp->rname); |
988 | } |
989 | |
990 | static adns_status cs_soa(vbuf *vb, const void *datap) { |
991 | const adns_rr_soa *rrp= datap; |
992 | char buf[20]; |
993 | int i; |
994 | adns_status st; |
995 | |
0872e289 |
996 | st= csp_domain(vb,rrp->mname); if (st) return st; |
61093792 |
997 | CSP_ADDSTR(" "); |
0872e289 |
998 | st= csp_mailbox(vb,rrp->rname); if (st) return st; |
61093792 |
999 | |
1000 | for (i=0; i<5; i++) { |
1001 | sprintf(buf," %lu",(&rrp->serial)[i]); |
1002 | CSP_ADDSTR(buf); |
1003 | } |
1004 | |
1005 | return adns_s_ok; |
1006 | } |
1007 | |
1008 | /* |
59d05d1c |
1009 | * _srv* (pa*2,di,cs*2,qdpl,postsort) |
bddb4c18 |
1010 | */ |
1011 | |
1012 | static adns_status qdpl_srv(adns_state ads, |
1013 | const char **p_io, const char *pe, int labelnum, |
1014 | char label_r[DNS_MAXDOMAIN], int *ll_io, |
1015 | adns_queryflags flags, |
1016 | const typeinfo *typei) { |
1017 | int useflags; |
1018 | const char *p_orig; |
1019 | adns_status st; |
1020 | |
1021 | if (labelnum < 2 && !(flags & adns_qf_quoteok_query)) { |
1022 | useflags= adns_qf_quoteok_query; |
1023 | p_orig= *p_io; |
1024 | } else { |
1025 | useflags= flags; |
1026 | p_orig= 0; |
1027 | } |
1028 | st= adns__qdpl_normal(ads, p_io,pe, labelnum,label_r, ll_io, useflags,typei); |
1029 | if (st) return st; |
1030 | |
1031 | if (p_orig) { |
1032 | int ll= *ll_io; |
1033 | if (!ll || label_r[0]!='_') |
1034 | return adns_s_querydomaininvalid; |
1035 | if (memchr(p_orig+1, '\\', pe - (p_orig+1))) |
1036 | return adns_s_querydomaininvalid; |
1037 | } |
1038 | return adns_s_ok; |
1039 | } |
1040 | |
7602bb91 |
1041 | static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max, |
375c6c48 |
1042 | adns_rr_srvha *rrp |
1043 | /* might be adns_rr_srvraw* */) { |
2248cdf4 |
1044 | const byte *dgram= pai->dgram; |
7602bb91 |
1045 | int ti, cbyte; |
1046 | |
1047 | cbyte= *cbyte_io; |
1048 | if ((*cbyte_io += 6) > max) return adns_s_invaliddata; |
2248cdf4 |
1049 | |
1050 | rrp->priority= GET_W(cbyte, ti); |
1051 | rrp->weight= GET_W(cbyte, ti); |
1052 | rrp->port= GET_W(cbyte, ti); |
1053 | return adns_s_ok; |
1054 | } |
1055 | |
1056 | static adns_status pa_srvraw(const parseinfo *pai, int cbyte, |
1057 | int max, void *datap) { |
1058 | adns_rr_srvraw *rrp= datap; |
1059 | adns_status st; |
1060 | |
7602bb91 |
1061 | st= pap_srv_begin(pai,&cbyte,max,datap); |
2248cdf4 |
1062 | if (st) return st; |
1063 | |
1064 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
1065 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
1066 | if (st) return st; |
1067 | |
1068 | if (cbyte != max) return adns_s_invaliddata; |
1069 | return adns_s_ok; |
1070 | } |
1071 | |
1072 | static adns_status pa_srvha(const parseinfo *pai, int cbyte, |
1073 | int max, void *datap) { |
1074 | adns_rr_srvha *rrp= datap; |
1075 | adns_status st; |
1076 | |
7602bb91 |
1077 | st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st; |
2248cdf4 |
1078 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st; |
1079 | if (cbyte != max) return adns_s_invaliddata; |
1080 | return adns_s_ok; |
1081 | } |
1082 | |
1083 | static void mf_srvraw(adns_query qu, void *datap) { |
1084 | adns_rr_srvraw *rrp= datap; |
1085 | adns__makefinal_str(qu, &rrp->host); |
1086 | } |
1087 | |
1088 | static void mf_srvha(adns_query qu, void *datap) { |
1089 | adns_rr_srvha *rrp= datap; |
1090 | mfp_hostaddr(qu,&rrp->ha); |
1091 | } |
1092 | |
1093 | static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) { |
1094 | const adns_rr_srvraw *ap= datap_a, *bp= datap_b; |
1095 | /* might be const adns_rr_svhostaddr* */ |
1096 | |
1097 | if (ap->priority < bp->priority) return 0; |
1098 | if (ap->priority > bp->priority) return 1; |
1099 | return 0; |
1100 | } |
1101 | |
375c6c48 |
1102 | static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp |
1103 | /* might be adns_rr_srvraw* */) { |
2248cdf4 |
1104 | char buf[30]; |
1105 | sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port); |
1106 | CSP_ADDSTR(buf); |
1107 | return adns_s_ok; |
1108 | } |
1109 | |
1110 | static adns_status cs_srvraw(vbuf *vb, const void *datap) { |
1111 | const adns_rr_srvraw *rrp= datap; |
1112 | adns_status st; |
1113 | |
375c6c48 |
1114 | st= csp_srv_begin(vb,(const void*)rrp); if (st) return st; |
2248cdf4 |
1115 | return csp_domain(vb,rrp->host); |
1116 | } |
1117 | |
1118 | static adns_status cs_srvha(vbuf *vb, const void *datap) { |
1119 | const adns_rr_srvha *rrp= datap; |
1120 | adns_status st; |
1121 | |
375c6c48 |
1122 | st= csp_srv_begin(vb,(const void*)datap); if (st) return st; |
2248cdf4 |
1123 | return csp_hostaddr(vb,&rrp->ha); |
1124 | } |
1125 | |
375c6c48 |
1126 | static void postsort_srv(adns_state ads, void *array, int nrrs, |
59d05d1c |
1127 | const struct typeinfo *typei) { |
375c6c48 |
1128 | /* we treat everything in the array as if it were an adns_rr_srvha |
1129 | * even though the array might be of adns_rr_srvraw. That's OK |
1130 | * because they have the same prefix, which is all we access. |
1131 | * We use typei->rrsz, too, rather than naive array indexing, of course. |
1132 | */ |
1133 | char *workbegin, *workend, *search, *arrayend; |
1134 | const adns_rr_srvha *rr; |
1135 | union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp; |
1136 | int cpriority, totalweight, runtotal; |
1137 | long randval; |
1138 | |
1139 | for (workbegin= array, arrayend= workbegin + typei->rrsz * nrrs; |
1140 | workbegin < arrayend; |
1141 | workbegin= workend) { |
1142 | cpriority= (rr=(void*)workbegin)->priority; |
1143 | |
1144 | for (workend= workbegin, totalweight= 0; |
1145 | workend < arrayend && (rr=(void*)workend)->priority == cpriority; |
1146 | workend += typei->rrsz) { |
1147 | totalweight += rr->weight; |
375c6c48 |
1148 | } |
1149 | |
1150 | /* Now workbegin..(workend-1) incl. are exactly all of the RRs of |
1151 | * cpriority. From now on, workbegin points to the `remaining' |
1152 | * records: we select one record at a time (RFC2782 `Usage rules' |
1153 | * and `Format of the SRV RR' subsection `Weight') to place at |
1154 | * workbegin (swapping with the one that was there, and then |
1155 | * advance workbegin. */ |
1156 | for (; |
1157 | workbegin + typei->rrsz < workend; /* don't bother if just one */ |
1158 | workbegin += typei->rrsz) { |
1159 | |
1160 | randval= nrand48(ads->rand48xsubi); |
1161 | randval %= (totalweight + 1); |
375c6c48 |
1162 | /* makes it into 0..totalweight inclusive; with 2^10 RRs, |
1163 | * totalweight must be <= 2^26 so probability nonuniformity is |
1164 | * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie |
1165 | * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5). |
1166 | */ |
1167 | |
1168 | for (search=workbegin, runtotal=0; |
1169 | (runtotal += (rr=(void*)search)->weight) < randval; |
1170 | search += typei->rrsz); |
375c6c48 |
1171 | assert(search < arrayend); |
1172 | totalweight -= rr->weight; |
1173 | if (search != workbegin) { |
1174 | memcpy(&rrtmp, workbegin, typei->rrsz); |
1175 | memcpy(workbegin, search, typei->rrsz); |
1176 | memcpy(search, &rrtmp, typei->rrsz); |
1177 | } |
1178 | } |
1179 | } |
59d05d1c |
1180 | /* tests: |
1181 | * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk. |
1182 | * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk. |
1183 | * ./adnshost_s -t srv- _jabber._tcp.jabber.org |
1184 | */ |
1185 | } |
1186 | |
bddb4c18 |
1187 | /* |
7d0aaee4 |
1188 | * _byteblock (mf) |
1189 | */ |
1190 | |
1191 | static void mf_byteblock(adns_query qu, void *datap) { |
1192 | adns_rr_byteblock *rrp= datap; |
1193 | void *bytes= rrp->data; |
1194 | adns__makefinal_block(qu,&bytes,rrp->len); |
1195 | rrp->data= bytes; |
1196 | } |
1197 | |
1198 | /* |
1199 | * _opaque (pa,cs) |
1200 | */ |
1201 | |
1202 | static adns_status pa_opaque(const parseinfo *pai, int cbyte, |
1203 | int max, void *datap) { |
1204 | adns_rr_byteblock *rrp= datap; |
1205 | |
1206 | rrp->len= max - cbyte; |
1207 | rrp->data= adns__alloc_interim(pai->qu, rrp->len); |
1208 | if (!rrp->data) R_NOMEM; |
1209 | memcpy(rrp->data, pai->dgram + cbyte, rrp->len); |
1210 | return adns_s_ok; |
1211 | } |
1212 | |
1213 | static adns_status cs_opaque(vbuf *vb, const void *datap) { |
1214 | const adns_rr_byteblock *rrp= datap; |
1215 | char buf[10]; |
1216 | int l; |
1217 | unsigned char *p; |
1218 | |
1219 | sprintf(buf,"\\# %d",rrp->len); |
1220 | CSP_ADDSTR(buf); |
1221 | |
1222 | for (l= rrp->len, p= rrp->data; |
1223 | l>=4; |
1224 | l -= 4, p += 4) { |
1225 | sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]); |
1226 | CSP_ADDSTR(buf); |
1227 | } |
1228 | for (; |
1229 | l>0; |
1230 | l--, p++) { |
1231 | sprintf(buf," %02x",*p); |
1232 | CSP_ADDSTR(buf); |
1233 | } |
1234 | return adns_s_ok; |
1235 | } |
1236 | |
1237 | /* |
14180727 |
1238 | * _flat (mf) |
1239 | */ |
1240 | |
cfdca685 |
1241 | static void mf_flat(adns_query qu, void *data) { } |
1242 | |
14180727 |
1243 | /* |
1244 | * Now the table. |
1245 | */ |
1246 | |
f2ad23ee |
1247 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
1e9efa71 |
1248 | |
cfdca685 |
1249 | #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb |
1250 | #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb |
5c596e4d |
1251 | |
bddb4c18 |
1252 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \ |
1253 | { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \ |
59d05d1c |
1254 | printer,parser,comparer, adns__qdpl_normal,0 } |
bddb4c18 |
1255 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \ |
1256 | { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat, \ |
59d05d1c |
1257 | printer,parser,comparer, adns__qdpl_normal,0 } |
1258 | #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer,qdpl,postsort) \ |
1259 | { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \ |
1260 | printer,parser,comparer,qdpl,postsort } |
5c596e4d |
1261 | |
1262 | static const typeinfo typeinfos[] = { |
14180727 |
1263 | /* Must be in ascending order of rrtype ! */ |
9c344a42 |
1264 | /* mem-mgmt code rrt fmt member parser comparer printer */ |
1265 | |
1266 | FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr,cs_inaddr ), |
1267 | DEEP_TYPE(ns_raw, "NS", "raw",str, pa_host_raw,0, cs_domain ), |
1268 | DEEP_TYPE(cname, "CNAME", 0, str, pa_dom_raw, 0, cs_domain ), |
1269 | DEEP_TYPE(soa_raw,"SOA", "raw",soa, pa_soa, 0, cs_soa ), |
1270 | DEEP_TYPE(ptr_raw,"PTR", "raw",str, pa_host_raw,0, cs_domain ), |
1271 | DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,pa_hinfo, 0, cs_hinfo ), |
1272 | DEEP_TYPE(mx_raw, "MX", "raw",intstr, pa_mx_raw, di_mx_raw,cs_inthost ), |
1273 | DEEP_TYPE(txt, "TXT", 0, manyistr,pa_txt, 0, cs_txt ), |
1274 | DEEP_TYPE(rp_raw, "RP", "raw",strpair, pa_rp, 0, cs_rp ), |
59d05d1c |
1275 | XTRA_TYPE(srv_raw,"SRV", "raw",srvraw , pa_srvraw, di_srv, cs_srvraw, |
1276 | qdpl_srv, postsort_srv), |
9c344a42 |
1277 | |
1278 | FLAT_TYPE(addr, "A", "addr", addr, pa_addr, di_addr, cs_addr ), |
1279 | DEEP_TYPE(ns, "NS", "+addr",hostaddr,pa_hostaddr,di_hostaddr,cs_hostaddr ), |
1280 | DEEP_TYPE(ptr, "PTR","checked",str, pa_ptr, 0, cs_domain ), |
1281 | DEEP_TYPE(mx, "MX", "+addr",inthostaddr,pa_mx, di_mx, cs_inthostaddr), |
59d05d1c |
1282 | XTRA_TYPE(srv, "SRV","+addr",srvha, pa_srvha, di_srv, cs_srvha, |
1283 | qdpl_srv, postsort_srv), |
bddb4c18 |
1284 | |
9c344a42 |
1285 | DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0, cs_soa ), |
1286 | DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0, cs_rp ), |
5c596e4d |
1287 | }; |
1288 | |
7d0aaee4 |
1289 | static const typeinfo typeinfo_unknown= |
1290 | DEEP_TYPE(unknown,0, "unknown",byteblock,pa_opaque, 0, cs_opaque ); |
1291 | |
c9afe7bb |
1292 | const typeinfo *adns__findtype(adns_rrtype type) { |
1293 | const typeinfo *begin, *end, *mid; |
5c596e4d |
1294 | |
7d0aaee4 |
1295 | if (type & adns_r_unknown) return &typeinfo_unknown; |
1296 | |
5c596e4d |
1297 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
1298 | |
1299 | while (begin < end) { |
1300 | mid= begin + ((end-begin)>>1); |
7d0aaee4 |
1301 | if (mid->typekey == type) return mid; |
1302 | if (type > mid->typekey) begin= mid+1; |
5c596e4d |
1303 | else end= mid; |
1304 | } |
1305 | return 0; |
1306 | } |