98db6da3 |
1 | /* |
2 | * types.c |
3 | * - RR-type-specific code, and the machinery to call it |
4 | */ |
5 | /* |
39f45e7e |
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.) |
98db6da3 |
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 | */ |
5c596e4d |
26 | |
d4c7b0b1 |
27 | #include <stdlib.h> |
28 | |
b6b3ac61 |
29 | #include <sys/types.h> |
763d28b9 |
30 | #include <sys/socket.h> |
31 | #include <netinet/in.h> |
1e9efa71 |
32 | #include <arpa/inet.h> |
33 | |
5c596e4d |
34 | #include "internal.h" |
35 | |
9c344a42 |
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) |
26eb6bdc |
40 | |
14180727 |
41 | /* |
42 | * order of sections: |
43 | * |
61093792 |
44 | * _string (pap) |
14180727 |
45 | * _textdata, _qstring (csp) |
46 | * _str (mf,cs) |
61093792 |
47 | * _intstr (mf,csp,cs) |
14180727 |
48 | * _manyistr (mf,cs) |
49 | * _txt (pa) |
50 | * _inaddr (pa,dip,di) |
51 | * _addr (pa,di,csp,cs) |
52 | * _domain (pap) |
53 | * _host_raw (pa) |
54 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs) |
55 | * _mx_raw (pa,di) |
56 | * _mx (pa,di) |
57 | * _inthostaddr (mf,cs) |
cd1bde2f |
58 | * _ptr (pa) |
61093792 |
59 | * _strpair (mf,cs) |
60 | * _intstrpair (mf,cs) |
61 | * _hinfo (pa) |
c2875680 |
62 | * _mailbox (pap +pap_mailbox822) |
61093792 |
63 | * _rp (pa) |
64 | * _soa (pa,mf,cs) |
59d05d1c |
65 | * _srv* (qdpl,(pap),pa,mf,di,(csp),cs,postsort) |
7d0aaee4 |
66 | * _byteblock (mf) |
67 | * _opaque (pa,cs) |
14180727 |
68 | * _flat (mf) |
69 | * |
70 | * within each section: |
2248cdf4 |
71 | * qdpl_* |
14180727 |
72 | * pap_* |
73 | * pa_* |
74 | * dip_* |
75 | * di_* |
76 | * mfp_* |
77 | * mf_* |
78 | * csp_* |
79 | * cs_* |
59d05d1c |
80 | * postsort_* |
14180727 |
81 | */ |
82 | |
83 | /* |
0872e289 |
84 | * _qstring (pap,csp) |
14180727 |
85 | */ |
86 | |
0872e289 |
87 | static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max, |
61093792 |
88 | int *len_r, char **str_r) { |
89 | /* Neither len_r nor str_r may be null. |
90 | * End of datagram (overrun) is indicated by returning adns_s_invaliddata; |
91 | */ |
92 | const byte *dgram= pai->dgram; |
93 | int l, cbyte; |
94 | char *str; |
95 | |
96 | cbyte= *cbyte_io; |
97 | |
98 | if (cbyte >= max) return adns_s_invaliddata; |
99 | GET_B(cbyte,l); |
100 | if (cbyte+l > max) return adns_s_invaliddata; |
101 | |
102 | str= adns__alloc_interim(pai->qu, l+1); |
103 | if (!str) R_NOMEM; |
104 | |
105 | str[l]= 0; |
106 | memcpy(str,dgram+cbyte,l); |
107 | |
108 | *len_r= l; |
109 | *str_r= str; |
110 | *cbyte_io= cbyte+l; |
111 | |
112 | return adns_s_ok; |
113 | } |
114 | |
0872e289 |
115 | static adns_status csp_qstring(vbuf *vb, const char *dp, int len) { |
14180727 |
116 | unsigned char ch; |
117 | char buf[10]; |
118 | int cn; |
119 | |
120 | CSP_ADDSTR("\""); |
121 | for (cn=0; cn<len; cn++) { |
122 | ch= *dp++; |
0872e289 |
123 | if (ch == '\\') { |
61093792 |
124 | CSP_ADDSTR("\\\\"); |
0872e289 |
125 | } else if (ch == '"') { |
126 | CSP_ADDSTR("\\\""); |
127 | } else if (ch >= 32 && ch <= 126) { |
128 | if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM; |
14180727 |
129 | } else { |
61093792 |
130 | sprintf(buf,"\\x%02x",ch); |
14180727 |
131 | CSP_ADDSTR(buf); |
132 | } |
133 | } |
134 | CSP_ADDSTR("\""); |
135 | |
136 | return adns_s_ok; |
137 | } |
138 | |
14180727 |
139 | /* |
0872e289 |
140 | * _str (mf) |
14180727 |
141 | */ |
142 | |
143 | static void mf_str(adns_query qu, void *datap) { |
144 | char **rrp= datap; |
145 | |
146 | adns__makefinal_str(qu,rrp); |
147 | } |
148 | |
14180727 |
149 | /* |
0872e289 |
150 | * _intstr (mf) |
14180727 |
151 | */ |
152 | |
153 | static void mf_intstr(adns_query qu, void *datap) { |
154 | adns_rr_intstr *rrp= datap; |
155 | |
156 | adns__makefinal_str(qu,&rrp->str); |
157 | } |
158 | |
14180727 |
159 | /* |
0872e289 |
160 | * _manyistr (mf) |
14180727 |
161 | */ |
162 | |
163 | static void mf_manyistr(adns_query qu, void *datap) { |
164 | adns_rr_intstr **rrp= datap; |
165 | adns_rr_intstr *te, *table; |
166 | void *tablev; |
167 | int tc; |
168 | |
169 | for (tc=0, te= *rrp; te->i >= 0; te++, tc++); |
170 | tablev= *rrp; |
171 | adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1)); |
172 | *rrp= table= tablev; |
173 | for (te= *rrp; te->i >= 0; te++) |
174 | adns__makefinal_str(qu,&te->str); |
175 | } |
176 | |
14180727 |
177 | /* |
0872e289 |
178 | * _txt (pa,cs) |
14180727 |
179 | */ |
180 | |
9c344a42 |
181 | static adns_status pa_txt(const parseinfo *pai, int cbyte, |
182 | int max, void *datap) { |
14180727 |
183 | adns_rr_intstr **rrp= datap, *table, *te; |
184 | const byte *dgram= pai->dgram; |
185 | int ti, tc, l, startbyte; |
61093792 |
186 | adns_status st; |
14180727 |
187 | |
188 | startbyte= cbyte; |
189 | if (cbyte >= max) return adns_s_invaliddata; |
190 | tc= 0; |
191 | while (cbyte < max) { |
192 | GET_B(cbyte,l); |
193 | cbyte+= l; |
61093792 |
194 | tc++; |
14180727 |
195 | } |
0872e289 |
196 | if (cbyte != max || !tc) return adns_s_invaliddata; |
14180727 |
197 | |
198 | table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1)); |
199 | if (!table) R_NOMEM; |
200 | |
201 | for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) { |
0872e289 |
202 | st= pap_qstring(pai, &cbyte, max, &te->i, &te->str); |
61093792 |
203 | if (st) return st; |
14180727 |
204 | } |
205 | assert(cbyte == max); |
206 | |
207 | te->i= -1; |
208 | te->str= 0; |
209 | |
210 | *rrp= table; |
211 | return adns_s_ok; |
cd363ffd |
212 | } |
213 | |
0872e289 |
214 | static adns_status cs_txt(vbuf *vb, const void *datap) { |
215 | const adns_rr_intstr *const *rrp= datap; |
216 | const adns_rr_intstr *current; |
217 | adns_status st; |
218 | int spc; |
219 | |
220 | for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) { |
221 | if (spc) CSP_ADDSTR(" "); |
222 | st= csp_qstring(vb,current->str,current->i); if (st) return st; |
223 | } |
224 | return adns_s_ok; |
225 | } |
226 | |
227 | /* |
228 | * _hinfo (cs) |
229 | */ |
230 | |
231 | static adns_status cs_hinfo(vbuf *vb, const void *datap) { |
232 | const adns_rr_intstrpair *rrp= datap; |
233 | adns_status st; |
234 | |
235 | st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st; |
236 | CSP_ADDSTR(" "); |
237 | st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st; |
238 | return adns_s_ok; |
239 | } |
240 | |
14180727 |
241 | /* |
242 | * _inaddr (pa,dip,di) |
243 | */ |
244 | |
9c344a42 |
245 | static adns_status pa_inaddr(const parseinfo *pai, int cbyte, |
246 | int max, void *datap) { |
f2ad23ee |
247 | struct in_addr *storeto= datap; |
68b7fc5f |
248 | |
249 | if (max-cbyte != 4) return adns_s_invaliddata; |
26eb6bdc |
250 | memcpy(storeto, pai->dgram + cbyte, 4); |
68b7fc5f |
251 | return adns_s_ok; |
252 | } |
253 | |
8c3aa944 |
254 | static int search_sortlist(adns_state ads, struct in_addr ad) { |
255 | const struct sortlist *slp; |
256 | int i; |
257 | |
258 | for (i=0, slp=ads->sortlist; |
9c344a42 |
259 | i<ads->nsortlist && |
260 | !((ad.s_addr & slp->mask.s_addr) == slp->base.s_addr); |
8c3aa944 |
261 | i++, slp++); |
262 | return i; |
14180727 |
263 | } |
264 | |
8c3aa944 |
265 | static int dip_inaddr(adns_state ads, struct in_addr a, struct in_addr b) { |
266 | int ai, bi; |
267 | |
268 | if (!ads->nsortlist) return 0; |
269 | |
270 | ai= search_sortlist(ads,a); |
271 | bi= search_sortlist(ads,b); |
272 | return bi<ai; |
273 | } |
274 | |
9c344a42 |
275 | static int di_inaddr(adns_state ads, |
276 | const void *datap_a, const void *datap_b) { |
f2ad23ee |
277 | const struct in_addr *ap= datap_a, *bp= datap_b; |
278 | |
8c3aa944 |
279 | return dip_inaddr(ads,*ap,*bp); |
f2ad23ee |
280 | } |
281 | |
282 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { |
283 | const struct in_addr *rrp= datap, rr= *rrp; |
1e9efa71 |
284 | const char *ia; |
285 | |
f2ad23ee |
286 | ia= inet_ntoa(rr); assert(ia); |
26eb6bdc |
287 | CSP_ADDSTR(ia); |
288 | return adns_s_ok; |
1e9efa71 |
289 | } |
68b7fc5f |
290 | |
14180727 |
291 | /* |
292 | * _addr (pa,di,csp,cs) |
293 | */ |
294 | |
9c344a42 |
295 | static adns_status pa_addr(const parseinfo *pai, int cbyte, |
296 | int max, void *datap) { |
bc01473e |
297 | adns_rr_addr *storeto= datap; |
26eb6bdc |
298 | const byte *dgram= pai->dgram; |
a1d2d0ed |
299 | |
cd363ffd |
300 | if (max-cbyte != 4) return adns_s_invaliddata; |
301 | storeto->len= sizeof(storeto->addr.inet); |
302 | memset(&storeto->addr,0,sizeof(storeto->addr.inet)); |
303 | storeto->addr.inet.sin_family= AF_INET; |
cd363ffd |
304 | memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4); |
305 | return adns_s_ok; |
306 | } |
307 | |
8c3aa944 |
308 | static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) { |
bc01473e |
309 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
cd363ffd |
310 | |
26eb6bdc |
311 | assert(ap->addr.sa.sa_family == AF_INET); |
8c3aa944 |
312 | return dip_inaddr(ads, ap->addr.inet.sin_addr, bp->addr.inet.sin_addr); |
cd363ffd |
313 | } |
314 | |
8c3aa944 |
315 | static int div_addr(void *context, const void *datap_a, const void *datap_b) { |
316 | const adns_state ads= context; |
317 | |
318 | return di_addr(ads, datap_a, datap_b); |
319 | } |
320 | |
bc01473e |
321 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
cd363ffd |
322 | const char *ia; |
5448fc9f |
323 | char buf[30]; |
cd363ffd |
324 | |
325 | switch (rrp->addr.inet.sin_family) { |
326 | case AF_INET: |
0872e289 |
327 | CSP_ADDSTR("INET "); |
cd363ffd |
328 | ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia); |
26eb6bdc |
329 | CSP_ADDSTR(ia); |
cd363ffd |
330 | break; |
331 | default: |
332 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); |
26eb6bdc |
333 | CSP_ADDSTR(buf); |
cd363ffd |
334 | break; |
335 | } |
336 | return adns_s_ok; |
337 | } |
338 | |
26eb6bdc |
339 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
bc01473e |
340 | const adns_rr_addr *rrp= datap; |
26eb6bdc |
341 | |
342 | return csp_addr(vb,rrp); |
343 | } |
344 | |
14180727 |
345 | /* |
0872e289 |
346 | * _domain (pap,csp,cs) |
347 | * _dom_raw (pa) |
14180727 |
348 | */ |
349 | |
26eb6bdc |
350 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
351 | char **domain_r, parsedomain_flags flags) { |
f2ad23ee |
352 | adns_status st; |
353 | char *dm; |
354 | |
26eb6bdc |
355 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
356 | pai->dgram,pai->dglen, cbyte_io, max); |
f2ad23ee |
357 | if (st) return st; |
26eb6bdc |
358 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
f2ad23ee |
359 | |
26eb6bdc |
360 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
361 | if (!dm) R_NOMEM; |
f2ad23ee |
362 | |
26eb6bdc |
363 | dm[pai->qu->vb.used]= 0; |
364 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); |
f2ad23ee |
365 | |
366 | *domain_r= dm; |
367 | return adns_s_ok; |
368 | } |
369 | |
0872e289 |
370 | static adns_status csp_domain(vbuf *vb, const char *domain) { |
371 | CSP_ADDSTR(domain); |
372 | if (!*domain) CSP_ADDSTR("."); |
373 | return adns_s_ok; |
374 | } |
375 | |
376 | static adns_status cs_domain(vbuf *vb, const void *datap) { |
377 | const char *const *domainp= datap; |
378 | return csp_domain(vb,*domainp); |
379 | } |
380 | |
9c344a42 |
381 | static adns_status pa_dom_raw(const parseinfo *pai, int cbyte, |
382 | int max, void *datap) { |
0872e289 |
383 | char **rrp= datap; |
384 | adns_status st; |
385 | |
386 | st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok); |
387 | if (st) return st; |
388 | |
389 | if (cbyte != max) return adns_s_invaliddata; |
390 | return adns_s_ok; |
391 | } |
392 | |
14180727 |
393 | /* |
394 | * _host_raw (pa) |
395 | */ |
396 | |
9c344a42 |
397 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, |
398 | int max, void *datap) { |
f2ad23ee |
399 | char **rrp= datap; |
cfdca685 |
400 | adns_status st; |
1e9efa71 |
401 | |
26eb6bdc |
402 | st= pap_domain(pai, &cbyte, max, rrp, |
403 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
f2ad23ee |
404 | if (st) return st; |
405 | |
406 | if (cbyte != max) return adns_s_invaliddata; |
407 | return adns_s_ok; |
408 | } |
cfdca685 |
409 | |
14180727 |
410 | /* |
bc01473e |
411 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs) |
14180727 |
412 | */ |
a1d2d0ed |
413 | |
26eb6bdc |
414 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
415 | int *cbyte_io, int count, int dmstart) { |
416 | int rri, naddrs; |
a1d2d0ed |
417 | int type, class, rdlen, rdstart, ownermatched; |
2c7b101b |
418 | unsigned long ttl; |
26eb6bdc |
419 | adns_status st; |
a1d2d0ed |
420 | |
26eb6bdc |
421 | for (rri=0, naddrs=-1; rri<count; rri++) { |
9c344a42 |
422 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, |
423 | pai->dglen, cbyte_io, |
2c7b101b |
424 | &type, &class, &ttl, &rdlen, &rdstart, |
26eb6bdc |
425 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
a1d2d0ed |
426 | if (st) return st; |
26eb6bdc |
427 | if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) { |
428 | if (naddrs>0) break; else continue; |
429 | } |
430 | if (naddrs == -1) { |
431 | naddrs= 0; |
a1d2d0ed |
432 | } |
9c344a42 |
433 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_rr_addr))) |
434 | R_NOMEM; |
2c7b101b |
435 | adns__update_expires(pai->qu,ttl,pai->now); |
bc01473e |
436 | st= pa_addr(pai, rdstart,rdstart+rdlen, |
437 | pai->qu->vb.buf + naddrs*sizeof(adns_rr_addr)); |
a1d2d0ed |
438 | if (st) return st; |
26eb6bdc |
439 | naddrs++; |
a1d2d0ed |
440 | } |
26eb6bdc |
441 | if (naddrs >= 0) { |
bc01473e |
442 | ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_rr_addr)); |
26eb6bdc |
443 | if (!ha->addrs) R_NOMEM; |
bc01473e |
444 | memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_rr_addr)); |
26eb6bdc |
445 | ha->naddrs= naddrs; |
a1d2d0ed |
446 | ha->astatus= adns_s_ok; |
26eb6bdc |
447 | |
8c3aa944 |
448 | adns__isort(ha->addrs, naddrs, sizeof(adns_rr_addr), pai->qu->vb.buf, |
449 | div_addr, pai->ads); |
a1d2d0ed |
450 | } |
451 | return adns_s_ok; |
452 | } |
453 | |
bc01473e |
454 | static void icb_hostaddr(adns_query parent, adns_query child) { |
bc01473e |
455 | adns_answer *cans= child->answer; |
cd1bde2f |
456 | adns_rr_hostaddr *rrp= child->ctx.info.hostaddr; |
cb32030b |
457 | adns_state ads= parent->ads; |
0872e289 |
458 | adns_status st; |
bc01473e |
459 | |
0872e289 |
460 | st= cans->status; |
461 | rrp->astatus= st; |
462 | rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs; |
bc01473e |
463 | rrp->addrs= cans->rrs.addr; |
9c344a42 |
464 | adns__transfer_interim(child, parent, rrp->addrs, |
465 | rrp->naddrs*sizeof(adns_rr_addr)); |
cd1bde2f |
466 | |
cb32030b |
467 | if (parent->children.head) { |
468 | LIST_LINK_TAIL(ads->childw,parent); |
469 | } else { |
470 | adns__query_done(parent); |
471 | } |
bc01473e |
472 | } |
473 | |
26eb6bdc |
474 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
475 | int max, adns_rr_hostaddr *rrp) { |
a1d2d0ed |
476 | adns_status st; |
477 | int dmstart, cbyte; |
ba1ddf08 |
478 | qcontext ctx; |
479 | int id; |
480 | adns_query nqu; |
59fbb06a |
481 | adns_queryflags nflags; |
a1d2d0ed |
482 | |
483 | dmstart= cbyte= *cbyte_io; |
26eb6bdc |
484 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
485 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
a1d2d0ed |
486 | if (st) return st; |
487 | *cbyte_io= cbyte; |
488 | |
489 | rrp->astatus= adns_s_ok; |
490 | rrp->naddrs= -1; |
491 | rrp->addrs= 0; |
492 | |
26eb6bdc |
493 | cbyte= pai->nsstart; |
a1d2d0ed |
494 | |
26eb6bdc |
495 | st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart); |
a1d2d0ed |
496 | if (st) return st; |
497 | if (rrp->naddrs != -1) return adns_s_ok; |
498 | |
26eb6bdc |
499 | st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart); |
a1d2d0ed |
500 | if (st) return st; |
501 | if (rrp->naddrs != -1) return adns_s_ok; |
26eb6bdc |
502 | |
ba1ddf08 |
503 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
504 | pai->dgram, pai->dglen, dmstart, |
505 | adns_r_addr, adns_qf_quoteok_query); |
506 | if (st) return st; |
bc01473e |
507 | |
cd1bde2f |
508 | ctx.ext= 0; |
509 | ctx.callback= icb_hostaddr; |
510 | ctx.info.hostaddr= rrp; |
59fbb06a |
511 | |
512 | nflags= adns_qf_quoteok_query; |
513 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; |
514 | |
ba1ddf08 |
515 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
7e6a84a1 |
516 | &pai->qu->vb, id, nflags, pai->now, &ctx); |
ba1ddf08 |
517 | if (st) return st; |
518 | |
519 | nqu->parent= pai->qu; |
520 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); |
26eb6bdc |
521 | |
522 | return adns_s_ok; |
a1d2d0ed |
523 | } |
524 | |
9c344a42 |
525 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, |
526 | int max, void *datap) { |
26eb6bdc |
527 | adns_rr_hostaddr *rrp= datap; |
a1d2d0ed |
528 | adns_status st; |
a1d2d0ed |
529 | |
26eb6bdc |
530 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
a1d2d0ed |
531 | if (st) return st; |
532 | if (cbyte != max) return adns_s_invaliddata; |
533 | |
26eb6bdc |
534 | return adns_s_ok; |
535 | } |
a1d2d0ed |
536 | |
9c344a42 |
537 | static int dip_hostaddr(adns_state ads, |
538 | const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { |
26eb6bdc |
539 | if (ap->astatus != bp->astatus) return ap->astatus; |
540 | if (ap->astatus) return 0; |
a1d2d0ed |
541 | |
26eb6bdc |
542 | assert(ap->addrs[0].addr.sa.sa_family == AF_INET); |
543 | assert(bp->addrs[0].addr.sa.sa_family == AF_INET); |
8c3aa944 |
544 | return dip_inaddr(ads, |
545 | ap->addrs[0].addr.inet.sin_addr, |
546 | bp->addrs[0].addr.inet.sin_addr); |
26eb6bdc |
547 | } |
548 | |
9c344a42 |
549 | static int di_hostaddr(adns_state ads, |
550 | const void *datap_a, const void *datap_b) { |
26eb6bdc |
551 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
552 | |
8c3aa944 |
553 | return dip_hostaddr(ads, ap,bp); |
a1d2d0ed |
554 | } |
555 | |
14180727 |
556 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
557 | void *tablev; |
f2ad23ee |
558 | |
14180727 |
559 | adns__makefinal_str(qu,&rrp->host); |
560 | tablev= rrp->addrs; |
561 | adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs)); |
562 | rrp->addrs= tablev; |
f2ad23ee |
563 | } |
564 | |
14180727 |
565 | static void mf_hostaddr(adns_query qu, void *datap) { |
566 | adns_rr_hostaddr *rrp= datap; |
f2ad23ee |
567 | |
14180727 |
568 | mfp_hostaddr(qu,rrp); |
f2ad23ee |
569 | } |
570 | |
26eb6bdc |
571 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
0fb18816 |
572 | const char *errstr; |
26eb6bdc |
573 | adns_status st; |
9e50e3ac |
574 | char buf[20]; |
26eb6bdc |
575 | int i; |
576 | |
0fb18816 |
577 | st= csp_domain(vb,rrp->host); if (st) return st; |
26eb6bdc |
578 | |
0872e289 |
579 | CSP_ADDSTR(" "); |
9e50e3ac |
580 | CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus)); |
581 | |
582 | sprintf(buf," %d ",rrp->astatus); |
583 | CSP_ADDSTR(buf); |
0fb18816 |
584 | |
9e50e3ac |
585 | CSP_ADDSTR(adns_errabbrev(rrp->astatus)); |
0fb18816 |
586 | CSP_ADDSTR(" "); |
9e50e3ac |
587 | |
0fb18816 |
588 | errstr= adns_strerror(rrp->astatus); |
589 | st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st; |
0872e289 |
590 | |
591 | if (rrp->naddrs >= 0) { |
592 | CSP_ADDSTR(" ("); |
593 | for (i=0; i<rrp->naddrs; i++) { |
594 | CSP_ADDSTR(" "); |
26eb6bdc |
595 | st= csp_addr(vb,&rrp->addrs[i]); |
596 | } |
0872e289 |
597 | CSP_ADDSTR(" )"); |
598 | } else { |
599 | CSP_ADDSTR(" ?"); |
26eb6bdc |
600 | } |
601 | return adns_s_ok; |
602 | } |
603 | |
604 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { |
605 | const adns_rr_hostaddr *rrp= datap; |
606 | |
607 | return csp_hostaddr(vb,rrp); |
608 | } |
609 | |
14180727 |
610 | /* |
611 | * _mx_raw (pa,di) |
612 | */ |
26eb6bdc |
613 | |
9c344a42 |
614 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, |
615 | int max, void *datap) { |
14180727 |
616 | const byte *dgram= pai->dgram; |
617 | adns_rr_intstr *rrp= datap; |
618 | adns_status st; |
619 | int pref; |
26eb6bdc |
620 | |
14180727 |
621 | if (cbyte+2 > max) return adns_s_invaliddata; |
622 | GET_W(cbyte,pref); |
623 | rrp->i= pref; |
624 | st= pap_domain(pai, &cbyte, max, &rrp->str, |
625 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
626 | if (st) return st; |
26eb6bdc |
627 | |
14180727 |
628 | if (cbyte != max) return adns_s_invaliddata; |
629 | return adns_s_ok; |
630 | } |
26eb6bdc |
631 | |
8c3aa944 |
632 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
14180727 |
633 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
634 | |
635 | if (ap->i < bp->i) return 0; |
636 | if (ap->i > bp->i) return 1; |
637 | return 0; |
26eb6bdc |
638 | } |
639 | |
14180727 |
640 | /* |
641 | * _mx (pa,di) |
642 | */ |
26eb6bdc |
643 | |
9c344a42 |
644 | static adns_status pa_mx(const parseinfo *pai, int cbyte, |
645 | int max, void *datap) { |
14180727 |
646 | const byte *dgram= pai->dgram; |
647 | adns_rr_inthostaddr *rrp= datap; |
648 | adns_status st; |
649 | int pref; |
650 | |
651 | if (cbyte+2 > max) return adns_s_invaliddata; |
652 | GET_W(cbyte,pref); |
653 | rrp->i= pref; |
654 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); |
655 | if (st) return st; |
656 | |
657 | if (cbyte != max) return adns_s_invaliddata; |
658 | return adns_s_ok; |
659 | } |
660 | |
8c3aa944 |
661 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
14180727 |
662 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
663 | |
664 | if (ap->i < bp->i) return 0; |
665 | if (ap->i > bp->i) return 1; |
8c3aa944 |
666 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
26eb6bdc |
667 | } |
668 | |
14180727 |
669 | /* |
670 | * _inthostaddr (mf,cs) |
671 | */ |
672 | |
26eb6bdc |
673 | static void mf_inthostaddr(adns_query qu, void *datap) { |
674 | adns_rr_inthostaddr *rrp= datap; |
675 | |
676 | mfp_hostaddr(qu,&rrp->ha); |
677 | } |
678 | |
14180727 |
679 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
680 | const adns_rr_inthostaddr *rrp= datap; |
681 | char buf[10]; |
f2ad23ee |
682 | |
14180727 |
683 | sprintf(buf,"%u ",rrp->i); |
684 | CSP_ADDSTR(buf); |
685 | |
686 | return csp_hostaddr(vb,&rrp->ha); |
cfdca685 |
687 | } |
688 | |
0872e289 |
689 | /* |
690 | * _inthost (cs) |
691 | */ |
692 | |
693 | static adns_status cs_inthost(vbuf *vb, const void *datap) { |
694 | const adns_rr_intstr *rrp= datap; |
695 | char buf[10]; |
696 | |
697 | sprintf(buf,"%u ",rrp->i); |
698 | CSP_ADDSTR(buf); |
699 | return csp_domain(vb,rrp->str); |
700 | } |
701 | |
cd1bde2f |
702 | /* |
703 | * _ptr (pa, +icb_ptr) |
704 | */ |
705 | |
706 | static void icb_ptr(adns_query parent, adns_query child) { |
707 | adns_answer *cans= child->answer; |
708 | const adns_rr_addr *queried, *found; |
cb32030b |
709 | adns_state ads= parent->ads; |
cd1bde2f |
710 | int i; |
711 | |
712 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { |
713 | adns__query_fail(parent,adns_s_inconsistent); |
714 | return; |
715 | } else if (cans->status) { |
716 | adns__query_fail(parent,cans->status); |
717 | return; |
718 | } |
719 | |
720 | queried= &parent->ctx.info.ptr_parent_addr; |
721 | for (i=0, found=cans->rrs.addr; i<cans->nrrs; i++, found++) { |
722 | if (queried->len == found->len && |
723 | !memcmp(&queried->addr,&found->addr,queried->len)) { |
cb32030b |
724 | if (!parent->children.head) { |
725 | adns__query_done(parent); |
726 | return; |
727 | } else { |
728 | LIST_LINK_TAIL(ads->childw,parent); |
729 | return; |
730 | } |
cd1bde2f |
731 | } |
732 | } |
733 | |
734 | adns__query_fail(parent,adns_s_inconsistent); |
735 | } |
736 | |
9c344a42 |
737 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, |
738 | int max, void *datap) { |
5448fc9f |
739 | static const char *const (expectdomain[])= { DNS_INADDR_ARPA }; |
cd1bde2f |
740 | |
741 | char **rrp= datap; |
742 | adns_status st; |
743 | adns_rr_addr *ap; |
744 | findlabel_state fls; |
745 | char *ep; |
746 | byte ipv[4]; |
747 | char labbuf[4]; |
748 | int cbyte, i, lablen, labstart, l, id; |
749 | adns_query nqu; |
750 | qcontext ctx; |
751 | |
752 | cbyte= dmstart; |
753 | st= pap_domain(pai, &cbyte, max, rrp, |
754 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
755 | if (st) return st; |
756 | if (cbyte != max) return adns_s_invaliddata; |
757 | |
758 | ap= &pai->qu->ctx.info.ptr_parent_addr; |
759 | if (!ap->len) { |
760 | adns__findlabel_start(&fls, pai->ads, -1, pai->qu, |
761 | pai->qu->query_dgram, pai->qu->query_dglen, |
762 | pai->qu->query_dglen, DNS_HDRSIZE, 0); |
763 | for (i=0; i<4; i++) { |
764 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); |
9b86645c |
765 | if (lablen<=0 || lablen>3) return adns_s_querydomainwrong; |
9c344a42 |
766 | memcpy(labbuf, pai->qu->query_dgram + labstart, lablen); |
767 | labbuf[lablen]= 0; |
768 | ipv[3-i]= strtoul(labbuf,&ep,10); |
769 | if (*ep) return adns_s_querydomainwrong; |
cd1bde2f |
770 | if (lablen>1 && pai->qu->query_dgram[labstart]=='0') |
9b86645c |
771 | return adns_s_querydomainwrong; |
cd1bde2f |
772 | } |
773 | for (i=0; i<sizeof(expectdomain)/sizeof(*expectdomain); i++) { |
774 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); |
775 | l= strlen(expectdomain[i]); |
9c344a42 |
776 | if (lablen != l || |
777 | memcmp(pai->qu->query_dgram + labstart, expectdomain[i], l)) |
9b86645c |
778 | return adns_s_querydomainwrong; |
cd1bde2f |
779 | } |
780 | st= adns__findlabel_next(&fls,&lablen,0); assert(!st); |
9b86645c |
781 | if (lablen) return adns_s_querydomainwrong; |
cd1bde2f |
782 | |
783 | ap->len= sizeof(struct sockaddr_in); |
784 | memset(&ap->addr,0,sizeof(ap->addr.inet)); |
785 | ap->addr.inet.sin_family= AF_INET; |
786 | ap->addr.inet.sin_addr.s_addr= |
787 | htonl((ipv[0]<<24) | (ipv[1]<<16) | (ipv[2]<<8) | (ipv[3])); |
788 | } |
789 | |
790 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
791 | pai->dgram, pai->dglen, dmstart, |
792 | adns_r_addr, adns_qf_quoteok_query); |
793 | if (st) return st; |
794 | |
795 | ctx.ext= 0; |
796 | ctx.callback= icb_ptr; |
797 | memset(&ctx.info,0,sizeof(ctx.info)); |
798 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
799 | &pai->qu->vb, id, |
7e6a84a1 |
800 | adns_qf_quoteok_query, pai->now, &ctx); |
cd1bde2f |
801 | if (st) return st; |
802 | |
803 | nqu->parent= pai->qu; |
804 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); |
cd1bde2f |
805 | return adns_s_ok; |
806 | } |
807 | |
61093792 |
808 | /* |
0872e289 |
809 | * _strpair (mf) |
61093792 |
810 | */ |
811 | |
812 | static void mf_strpair(adns_query qu, void *datap) { |
813 | adns_rr_strpair *rrp= datap; |
814 | |
815 | adns__makefinal_str(qu,&rrp->array[0]); |
816 | adns__makefinal_str(qu,&rrp->array[1]); |
817 | } |
818 | |
61093792 |
819 | /* |
0872e289 |
820 | * _intstrpair (mf) |
61093792 |
821 | */ |
822 | |
823 | static void mf_intstrpair(adns_query qu, void *datap) { |
824 | adns_rr_intstrpair *rrp= datap; |
825 | |
826 | adns__makefinal_str(qu,&rrp->array[0].str); |
827 | adns__makefinal_str(qu,&rrp->array[1].str); |
828 | } |
829 | |
61093792 |
830 | /* |
831 | * _hinfo (pa) |
832 | */ |
833 | |
9c344a42 |
834 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, |
835 | int max, void *datap) { |
61093792 |
836 | adns_rr_intstrpair *rrp= datap; |
837 | adns_status st; |
838 | int i; |
839 | |
840 | for (i=0; i<2; i++) { |
0872e289 |
841 | st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
61093792 |
842 | if (st) return st; |
843 | } |
844 | |
845 | if (cbyte != max) return adns_s_invaliddata; |
846 | |
847 | return adns_s_ok; |
848 | } |
849 | |
850 | /* |
0872e289 |
851 | * _mailbox (pap,cs) |
61093792 |
852 | */ |
853 | |
9c344a42 |
854 | static adns_status pap_mailbox822(const parseinfo *pai, |
855 | int *cbyte_io, int max, char **mb_r) { |
6f2c243f |
856 | int lablen, labstart, i, needquote, c, r, neednorm; |
857 | const unsigned char *p; |
858 | char *str; |
859 | findlabel_state fls; |
860 | adns_status st; |
861 | vbuf *vb; |
862 | |
863 | vb= &pai->qu->vb; |
864 | vb->used= 0; |
865 | adns__findlabel_start(&fls, pai->ads, |
866 | -1, pai->qu, |
867 | pai->dgram, pai->dglen, max, |
868 | *cbyte_io, cbyte_io); |
869 | st= adns__findlabel_next(&fls,&lablen,&labstart); |
870 | if (!lablen) { |
0872e289 |
871 | adns__vbuf_appendstr(vb,"."); |
6f2c243f |
872 | goto x_ok; |
873 | } |
874 | |
875 | neednorm= 1; |
876 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) { |
877 | c= *p++; |
878 | if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata; |
879 | if (c == '.' && !neednorm) neednorm= 1; |
67ca39c8 |
880 | else if (c==' ' || c>=127 || ctype_822special(c)) needquote++; |
6f2c243f |
881 | else neednorm= 0; |
882 | } |
883 | |
884 | if (needquote || neednorm) { |
885 | r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM; |
886 | adns__vbuf_appendq(vb,"\"",1); |
887 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) { |
888 | c= *p; |
0872e289 |
889 | if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1); |
6f2c243f |
890 | adns__vbuf_appendq(vb,p,1); |
891 | } |
892 | adns__vbuf_appendq(vb,"\"",1); |
893 | } else { |
894 | r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM; |
895 | } |
896 | |
897 | r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM; |
898 | |
899 | st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram); |
900 | if (st) return st; |
901 | |
902 | x_ok: |
903 | str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM; |
904 | memcpy(str,vb->buf,vb->used); |
905 | str[vb->used]= 0; |
906 | *mb_r= str; |
907 | return adns_s_ok; |
61093792 |
908 | } |
909 | |
c2875680 |
910 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
911 | char **mb_r) { |
7d0aaee4 |
912 | if (pai->qu->typei->typekey & adns__qtf_mail822) { |
c2875680 |
913 | return pap_mailbox822(pai, cbyte_io, max, mb_r); |
914 | } else { |
0872e289 |
915 | return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok); |
c2875680 |
916 | } |
917 | } |
918 | |
0872e289 |
919 | static adns_status csp_mailbox(vbuf *vb, const char *mailbox) { |
920 | return csp_domain(vb,mailbox); |
921 | } |
922 | |
61093792 |
923 | /* |
0872e289 |
924 | * _rp (pa,cs) |
61093792 |
925 | */ |
926 | |
9c344a42 |
927 | static adns_status pa_rp(const parseinfo *pai, int cbyte, |
928 | int max, void *datap) { |
61093792 |
929 | adns_rr_strpair *rrp= datap; |
930 | adns_status st; |
931 | |
932 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); |
933 | if (st) return st; |
934 | |
935 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); |
936 | if (st) return st; |
937 | |
938 | if (cbyte != max) return adns_s_invaliddata; |
939 | return adns_s_ok; |
940 | } |
941 | |
0872e289 |
942 | static adns_status cs_rp(vbuf *vb, const void *datap) { |
943 | const adns_rr_strpair *rrp= datap; |
944 | adns_status st; |
945 | |
946 | st= csp_mailbox(vb,rrp->array[0]); if (st) return st; |
947 | CSP_ADDSTR(" "); |
948 | st= csp_domain(vb,rrp->array[1]); if (st) return st; |
949 | |
950 | return adns_s_ok; |
951 | } |
952 | |
61093792 |
953 | /* |
954 | * _soa (pa,mf,cs) |
955 | */ |
956 | |
9c344a42 |
957 | static adns_status pa_soa(const parseinfo *pai, int cbyte, |
958 | int max, void *datap) { |
61093792 |
959 | adns_rr_soa *rrp= datap; |
960 | const byte *dgram= pai->dgram; |
961 | adns_status st; |
962 | int msw, lsw, i; |
963 | |
964 | st= pap_domain(pai, &cbyte, max, &rrp->mname, |
965 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
966 | if (st) return st; |
967 | |
968 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); |
969 | if (st) return st; |
970 | |
971 | if (cbyte+20 != max) return adns_s_invaliddata; |
972 | |
973 | for (i=0; i<5; i++) { |
974 | GET_W(cbyte,msw); |
975 | GET_W(cbyte,lsw); |
976 | (&rrp->serial)[i]= (msw<<16) | lsw; |
977 | } |
978 | |
979 | return adns_s_ok; |
980 | } |
981 | |
982 | static void mf_soa(adns_query qu, void *datap) { |
983 | adns_rr_soa *rrp= datap; |
984 | |
985 | adns__makefinal_str(qu,&rrp->mname); |
986 | adns__makefinal_str(qu,&rrp->rname); |
987 | } |
988 | |
989 | static adns_status cs_soa(vbuf *vb, const void *datap) { |
990 | const adns_rr_soa *rrp= datap; |
991 | char buf[20]; |
992 | int i; |
993 | adns_status st; |
994 | |
0872e289 |
995 | st= csp_domain(vb,rrp->mname); if (st) return st; |
61093792 |
996 | CSP_ADDSTR(" "); |
0872e289 |
997 | st= csp_mailbox(vb,rrp->rname); if (st) return st; |
61093792 |
998 | |
999 | for (i=0; i<5; i++) { |
1000 | sprintf(buf," %lu",(&rrp->serial)[i]); |
1001 | CSP_ADDSTR(buf); |
1002 | } |
1003 | |
1004 | return adns_s_ok; |
1005 | } |
1006 | |
bddb4c18 |
1007 | /* |
59d05d1c |
1008 | * _srv* (pa*2,di,cs*2,qdpl,postsort) |
bddb4c18 |
1009 | */ |
1010 | |
1011 | static adns_status qdpl_srv(adns_state ads, |
1012 | const char **p_io, const char *pe, int labelnum, |
1013 | char label_r[DNS_MAXDOMAIN], int *ll_io, |
1014 | adns_queryflags flags, |
1015 | const typeinfo *typei) { |
1016 | int useflags; |
1017 | const char *p_orig; |
1018 | adns_status st; |
1019 | |
1020 | if (labelnum < 2 && !(flags & adns_qf_quoteok_query)) { |
1021 | useflags= adns_qf_quoteok_query; |
1022 | p_orig= *p_io; |
1023 | } else { |
1024 | useflags= flags; |
1025 | p_orig= 0; |
1026 | } |
1027 | st= adns__qdpl_normal(ads, p_io,pe, labelnum,label_r, ll_io, useflags,typei); |
1028 | if (st) return st; |
1029 | |
1030 | if (p_orig) { |
1031 | int ll= *ll_io; |
1032 | if (!ll || label_r[0]!='_') |
1033 | return adns_s_querydomaininvalid; |
1034 | if (memchr(p_orig+1, '\\', pe - (p_orig+1))) |
1035 | return adns_s_querydomaininvalid; |
1036 | } |
1037 | return adns_s_ok; |
1038 | } |
1039 | |
7602bb91 |
1040 | static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max, |
375c6c48 |
1041 | adns_rr_srvha *rrp |
1042 | /* might be adns_rr_srvraw* */) { |
2248cdf4 |
1043 | const byte *dgram= pai->dgram; |
7602bb91 |
1044 | int ti, cbyte; |
1045 | |
1046 | cbyte= *cbyte_io; |
1047 | if ((*cbyte_io += 6) > max) return adns_s_invaliddata; |
2248cdf4 |
1048 | |
1049 | rrp->priority= GET_W(cbyte, ti); |
1050 | rrp->weight= GET_W(cbyte, ti); |
1051 | rrp->port= GET_W(cbyte, ti); |
1052 | return adns_s_ok; |
1053 | } |
1054 | |
1055 | static adns_status pa_srvraw(const parseinfo *pai, int cbyte, |
1056 | int max, void *datap) { |
1057 | adns_rr_srvraw *rrp= datap; |
1058 | adns_status st; |
1059 | |
7602bb91 |
1060 | st= pap_srv_begin(pai,&cbyte,max,datap); |
2248cdf4 |
1061 | if (st) return st; |
1062 | |
1063 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
1064 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); |
1065 | if (st) return st; |
1066 | |
1067 | if (cbyte != max) return adns_s_invaliddata; |
1068 | return adns_s_ok; |
1069 | } |
1070 | |
1071 | static adns_status pa_srvha(const parseinfo *pai, int cbyte, |
1072 | int max, void *datap) { |
1073 | adns_rr_srvha *rrp= datap; |
1074 | adns_status st; |
1075 | |
7602bb91 |
1076 | st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st; |
2248cdf4 |
1077 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st; |
1078 | if (cbyte != max) return adns_s_invaliddata; |
1079 | return adns_s_ok; |
1080 | } |
1081 | |
1082 | static void mf_srvraw(adns_query qu, void *datap) { |
1083 | adns_rr_srvraw *rrp= datap; |
1084 | adns__makefinal_str(qu, &rrp->host); |
1085 | } |
1086 | |
1087 | static void mf_srvha(adns_query qu, void *datap) { |
1088 | adns_rr_srvha *rrp= datap; |
1089 | mfp_hostaddr(qu,&rrp->ha); |
1090 | } |
1091 | |
1092 | static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) { |
1093 | const adns_rr_srvraw *ap= datap_a, *bp= datap_b; |
1094 | /* might be const adns_rr_svhostaddr* */ |
1095 | |
1096 | if (ap->priority < bp->priority) return 0; |
1097 | if (ap->priority > bp->priority) return 1; |
1098 | return 0; |
1099 | } |
1100 | |
375c6c48 |
1101 | static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp |
1102 | /* might be adns_rr_srvraw* */) { |
2248cdf4 |
1103 | char buf[30]; |
1104 | sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port); |
1105 | CSP_ADDSTR(buf); |
1106 | return adns_s_ok; |
1107 | } |
1108 | |
1109 | static adns_status cs_srvraw(vbuf *vb, const void *datap) { |
1110 | const adns_rr_srvraw *rrp= datap; |
1111 | adns_status st; |
1112 | |
375c6c48 |
1113 | st= csp_srv_begin(vb,(const void*)rrp); if (st) return st; |
2248cdf4 |
1114 | return csp_domain(vb,rrp->host); |
1115 | } |
1116 | |
1117 | static adns_status cs_srvha(vbuf *vb, const void *datap) { |
1118 | const adns_rr_srvha *rrp= datap; |
1119 | adns_status st; |
1120 | |
375c6c48 |
1121 | st= csp_srv_begin(vb,(const void*)datap); if (st) return st; |
2248cdf4 |
1122 | return csp_hostaddr(vb,&rrp->ha); |
1123 | } |
1124 | |
375c6c48 |
1125 | static void postsort_srv(adns_state ads, void *array, int nrrs, |
59d05d1c |
1126 | const struct typeinfo *typei) { |
375c6c48 |
1127 | /* we treat everything in the array as if it were an adns_rr_srvha |
1128 | * even though the array might be of adns_rr_srvraw. That's OK |
1129 | * because they have the same prefix, which is all we access. |
1130 | * We use typei->rrsz, too, rather than naive array indexing, of course. |
1131 | */ |
1132 | char *workbegin, *workend, *search, *arrayend; |
1133 | const adns_rr_srvha *rr; |
1134 | union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp; |
1135 | int cpriority, totalweight, runtotal; |
1136 | long randval; |
1137 | |
1138 | for (workbegin= array, arrayend= workbegin + typei->rrsz * nrrs; |
1139 | workbegin < arrayend; |
1140 | workbegin= workend) { |
1141 | cpriority= (rr=(void*)workbegin)->priority; |
1142 | |
1143 | for (workend= workbegin, totalweight= 0; |
1144 | workend < arrayend && (rr=(void*)workend)->priority == cpriority; |
1145 | workend += typei->rrsz) { |
1146 | totalweight += rr->weight; |
375c6c48 |
1147 | } |
1148 | |
1149 | /* Now workbegin..(workend-1) incl. are exactly all of the RRs of |
1150 | * cpriority. From now on, workbegin points to the `remaining' |
1151 | * records: we select one record at a time (RFC2782 `Usage rules' |
1152 | * and `Format of the SRV RR' subsection `Weight') to place at |
1153 | * workbegin (swapping with the one that was there, and then |
1154 | * advance workbegin. */ |
1155 | for (; |
1156 | workbegin + typei->rrsz < workend; /* don't bother if just one */ |
1157 | workbegin += typei->rrsz) { |
1158 | |
1159 | randval= nrand48(ads->rand48xsubi); |
1160 | randval %= (totalweight + 1); |
375c6c48 |
1161 | /* makes it into 0..totalweight inclusive; with 2^10 RRs, |
1162 | * totalweight must be <= 2^26 so probability nonuniformity is |
1163 | * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie |
1164 | * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5). |
1165 | */ |
1166 | |
1167 | for (search=workbegin, runtotal=0; |
1168 | (runtotal += (rr=(void*)search)->weight) < randval; |
1169 | search += typei->rrsz); |
375c6c48 |
1170 | assert(search < arrayend); |
1171 | totalweight -= rr->weight; |
1172 | if (search != workbegin) { |
1173 | memcpy(&rrtmp, workbegin, typei->rrsz); |
1174 | memcpy(workbegin, search, typei->rrsz); |
1175 | memcpy(search, &rrtmp, typei->rrsz); |
1176 | } |
1177 | } |
1178 | } |
59d05d1c |
1179 | /* tests: |
1180 | * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk. |
1181 | * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk. |
1182 | * ./adnshost_s -t srv- _jabber._tcp.jabber.org |
1183 | */ |
1184 | } |
1185 | |
7d0aaee4 |
1186 | /* |
1187 | * _byteblock (mf) |
1188 | */ |
1189 | |
1190 | static void mf_byteblock(adns_query qu, void *datap) { |
1191 | adns_rr_byteblock *rrp= datap; |
1192 | void *bytes= rrp->data; |
1193 | adns__makefinal_block(qu,&bytes,rrp->len); |
1194 | rrp->data= bytes; |
1195 | } |
1196 | |
1197 | /* |
1198 | * _opaque (pa,cs) |
1199 | */ |
1200 | |
1201 | static adns_status pa_opaque(const parseinfo *pai, int cbyte, |
1202 | int max, void *datap) { |
1203 | adns_rr_byteblock *rrp= datap; |
1204 | |
1205 | rrp->len= max - cbyte; |
1206 | rrp->data= adns__alloc_interim(pai->qu, rrp->len); |
1207 | if (!rrp->data) R_NOMEM; |
1208 | memcpy(rrp->data, pai->dgram + cbyte, rrp->len); |
1209 | return adns_s_ok; |
1210 | } |
1211 | |
1212 | static adns_status cs_opaque(vbuf *vb, const void *datap) { |
1213 | const adns_rr_byteblock *rrp= datap; |
1214 | char buf[10]; |
1215 | int l; |
1216 | unsigned char *p; |
1217 | |
1218 | sprintf(buf,"\\# %d",rrp->len); |
1219 | CSP_ADDSTR(buf); |
1220 | |
1221 | for (l= rrp->len, p= rrp->data; |
1222 | l>=4; |
1223 | l -= 4, p += 4) { |
1224 | sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]); |
1225 | CSP_ADDSTR(buf); |
1226 | } |
1227 | for (; |
1228 | l>0; |
1229 | l--, p++) { |
1230 | sprintf(buf," %02x",*p); |
1231 | CSP_ADDSTR(buf); |
1232 | } |
1233 | return adns_s_ok; |
1234 | } |
1235 | |
14180727 |
1236 | /* |
1237 | * _flat (mf) |
1238 | */ |
1239 | |
cfdca685 |
1240 | static void mf_flat(adns_query qu, void *data) { } |
1241 | |
14180727 |
1242 | /* |
1243 | * Now the table. |
1244 | */ |
1245 | |
f2ad23ee |
1246 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
1e9efa71 |
1247 | |
cfdca685 |
1248 | #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb |
1249 | #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb |
5c596e4d |
1250 | |
bddb4c18 |
1251 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \ |
1252 | { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \ |
59d05d1c |
1253 | printer,parser,comparer, adns__qdpl_normal,0 } |
bddb4c18 |
1254 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \ |
1255 | { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat, \ |
59d05d1c |
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 } |
5c596e4d |
1260 | |
1261 | static const typeinfo typeinfos[] = { |
14180727 |
1262 | /* Must be in ascending order of rrtype ! */ |
9c344a42 |
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 ), |
59d05d1c |
1274 | XTRA_TYPE(srv_raw,"SRV", "raw",srvraw , pa_srvraw, di_srv, cs_srvraw, |
1275 | qdpl_srv, postsort_srv), |
9c344a42 |
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), |
59d05d1c |
1281 | XTRA_TYPE(srv, "SRV","+addr",srvha, pa_srvha, di_srv, cs_srvha, |
1282 | qdpl_srv, postsort_srv), |
bddb4c18 |
1283 | |
9c344a42 |
1284 | DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0, cs_soa ), |
1285 | DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0, cs_rp ), |
5c596e4d |
1286 | }; |
1287 | |
7d0aaee4 |
1288 | static const typeinfo typeinfo_unknown= |
1289 | DEEP_TYPE(unknown,0, "unknown",byteblock,pa_opaque, 0, cs_opaque ); |
1290 | |
c9afe7bb |
1291 | const typeinfo *adns__findtype(adns_rrtype type) { |
1292 | const typeinfo *begin, *end, *mid; |
5c596e4d |
1293 | |
7d0aaee4 |
1294 | if (type & adns_r_unknown) return &typeinfo_unknown; |
1295 | |
5c596e4d |
1296 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
1297 | |
1298 | while (begin < end) { |
1299 | mid= begin + ((end-begin)>>1); |
7d0aaee4 |
1300 | if (mid->typekey == type) return mid; |
1301 | if (type > mid->typekey) begin= mid+1; |
5c596e4d |
1302 | else end= mid; |
1303 | } |
1304 | return 0; |
1305 | } |