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