3 * - RR-type-specific code, and the machinery to call it
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.)
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)
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.
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.
30 #include <sys/types.h>
31 #include <sys/socket.h>
32 #include <netinet/in.h>
33 #include <arpa/inet.h>
38 #define R_NOMEM return adns_s_nomemory
39 #define CSP_ADDSTR(s) do { \
40 if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \
47 * _textdata, _qstring (csp)
52 * _inaddr (pa,cs,di, +search_sortlist, dip_genaddr)
54 * _addr (pap,pa,di,csp,cs,gsz,qs, +search_sortlist_sa,
55 * dip_sockaddr, rrtypes)
58 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
61 * _inthostaddr (mf,cs)
66 * _mailbox (pap +pap_mailbox822)
69 * _srv* (ckl,(pap),pa,mf,di,(csp),cs,postsort)
74 * within each section:
91 static adns_status
pap_qstring(const parseinfo
*pai
, int *cbyte_io
, int max
,
92 int *len_r
, char **str_r
) {
93 /* Neither len_r nor str_r may be null.
94 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
96 const byte
*dgram
= pai
->dgram
;
102 if (cbyte
>= max
) return adns_s_invaliddata
;
104 if (cbyte
+l
> max
) return adns_s_invaliddata
;
106 str
= adns__alloc_interim(pai
->qu
, l
+1);
110 memcpy(str
,dgram
+cbyte
,l
);
119 static adns_status
csp_qstring(vbuf
*vb
, const char *dp
, int len
) {
125 for (cn
=0; cn
<len
; cn
++) {
129 } else if (ch
== '"') {
131 } else if (ch
>= 32 && ch
<= 126) {
132 if (!adns__vbuf_append(vb
,&ch
,1)) R_NOMEM
;
134 sprintf(buf
,"\\x%02x",ch
);
147 static void mf_str(adns_query qu
, void *datap
) {
150 adns__makefinal_str(qu
,rrp
);
157 static void mf_intstr(adns_query qu
, void *datap
) {
158 adns_rr_intstr
*rrp
= datap
;
160 adns__makefinal_str(qu
,&rrp
->str
);
167 static void mf_manyistr(adns_query qu
, void *datap
) {
168 adns_rr_intstr
**rrp
= datap
;
169 adns_rr_intstr
*te
, *table
;
173 for (tc
=0, te
= *rrp
; te
->i
>= 0; te
++, tc
++);
175 adns__makefinal_block(qu
,&tablev
,sizeof(*te
)*(tc
+1));
177 for (te
= *rrp
; te
->i
>= 0; te
++)
178 adns__makefinal_str(qu
,&te
->str
);
185 static adns_status
pa_txt(const parseinfo
*pai
, int cbyte
,
186 int max
, void *datap
) {
187 adns_rr_intstr
**rrp
= datap
, *table
, *te
;
188 const byte
*dgram
= pai
->dgram
;
189 int ti
, tc
, l
, startbyte
;
193 if (cbyte
>= max
) return adns_s_invaliddata
;
195 while (cbyte
< max
) {
200 if (cbyte
!= max
|| !tc
) return adns_s_invaliddata
;
202 table
= adns__alloc_interim(pai
->qu
,sizeof(*table
)*(tc
+1));
205 for (cbyte
=startbyte
, ti
=0, te
=table
; ti
<tc
; ti
++, te
++) {
206 st
= pap_qstring(pai
, &cbyte
, max
, &te
->i
, &te
->str
);
209 assert(cbyte
== max
);
218 static adns_status
cs_txt(vbuf
*vb
, const void *datap
) {
219 const adns_rr_intstr
*const *rrp
= datap
;
220 const adns_rr_intstr
*current
;
224 for (current
= *rrp
, spc
=0; current
->i
>= 0; current
++, spc
=1) {
225 if (spc
) CSP_ADDSTR(" ");
226 st
= csp_qstring(vb
,current
->str
,current
->i
); if (st
) return st
;
235 static adns_status
cs_hinfo(vbuf
*vb
, const void *datap
) {
236 const adns_rr_intstrpair
*rrp
= datap
;
239 st
= csp_qstring(vb
,rrp
->array
[0].str
,rrp
->array
[0].i
); if (st
) return st
;
241 st
= csp_qstring(vb
,rrp
->array
[1].str
,rrp
->array
[1].i
); if (st
) return st
;
246 * _inaddr (pa,di,cs +search_sortlist, dip_genaddr)
249 static adns_status
pa_inaddr(const parseinfo
*pai
, int cbyte
,
250 int max
, void *datap
) {
251 struct in_addr
*storeto
= datap
;
253 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
254 memcpy(storeto
, pai
->dgram
+ cbyte
, 4);
258 static int search_sortlist(adns_state ads
, int af
, const void *ad
) {
259 const struct sortlist
*slp
;
260 const struct in6_addr
*a6
;
265 if (af
== AF_INET6
) {
267 if (IN6_IS_ADDR_V4MAPPED(a6
)) {
268 a
.v4
.s_addr
= htonl(((unsigned long)a6
->s6_addr
[12] << 24) |
269 ((unsigned long)a6
->s6_addr
[13] << 16) |
270 ((unsigned long)a6
->s6_addr
[14] << 8) |
271 ((unsigned long)a6
->s6_addr
[15] << 0));
276 for (i
=0, slp
=ads
->sortlist
;
278 !(af
== slp
->ai
->af
&&
279 slp
->ai
->matchp(ad
, &slp
->base
, &slp
->mask
)) &&
280 !(v6mappedp
&& slp
->ai
->af
== AF_INET
&&
281 slp
->ai
->matchp(&a
, &slp
->base
, &slp
->mask
));
286 static int dip_genaddr(adns_state ads
, int af
, const void *a
, const void *b
) {
289 if (!ads
->nsortlist
) return 0;
291 ai
= search_sortlist(ads
,af
,a
);
292 bi
= search_sortlist(ads
,af
,b
);
296 static int di_inaddr(adns_state ads
,
297 const void *datap_a
, const void *datap_b
) {
298 return dip_genaddr(ads
,AF_INET
,datap_a
,datap_b
);
301 static adns_status
cs_inaddr(vbuf
*vb
, const void *datap
) {
302 const struct in_addr
*rrp
= datap
, rr
= *rrp
;
305 ia
= inet_ntoa(rr
); assert(ia
);
311 * _in6addr (pa,di,cs)
314 static adns_status
pa_in6addr(const parseinfo
*pai
, int cbyte
,
315 int max
, void *datap
) {
316 struct in6_addr
*storeto
= datap
;
318 if (max
-cbyte
!= 16) return adns_s_invaliddata
;
319 memcpy(storeto
->s6_addr
, pai
->dgram
+ cbyte
, 16);
323 static int di_in6addr(adns_state ads
,
324 const void *datap_a
, const void *datap_b
) {
325 return dip_genaddr(ads
,AF_INET6
,datap_a
,datap_b
);
328 static adns_status
cs_in6addr(vbuf
*vb
, const void *datap
) {
329 char buf
[INET6_ADDRSTRLEN
];
332 ia
= inet_ntop(AF_INET6
, datap
, buf
, sizeof(buf
)); assert(ia
);
338 * _addr (pap,pa,di,csp,cs,gsz,qs, +search_sortlist_sa, dip_sockaddr,
342 static const typeinfo tinfo_addrsub
;
344 #define ADDR_RRTYPES(_) _(a) _(aaaa)
346 static const adns_rrtype addr_all_rrtypes
[] = {
347 #define RRTY_CODE(ty) adns_r_##ty,
348 ADDR_RRTYPES(RRTY_CODE
)
353 #define RRTY_INDEX(ty) addr__ri_##ty,
354 ADDR_RRTYPES(RRTY_INDEX
)
357 #define RRTY_FLAG(ty) addr_rf_##ty = 1 << addr__ri_##ty,
358 ADDR_RRTYPES(RRTY_FLAG
)
363 static unsigned addr_rrtypeflag(adns_rrtype type
)
367 type
&= adns_rrt_typemask
;
368 for (i
= 0; i
< addr_nrrtypes
&& type
!= addr_all_rrtypes
[i
]; i
++);
369 assert(i
< addr_nrrtypes
);
373 /* About CNAME handling in addr queries.
375 * A user-level addr query is translated into a number of protocol-level
376 * queries, and its job is to reassemble the results. This gets tricky if
377 * the answers aren't consistent. In particular, if the answers report
378 * inconsistent indirection via CNAME records (e.g., different CNAMEs, or
379 * some indirect via a CNAME, and some don't) then we have trouble.
381 * Once we've received an answer, even if it was NODATA, we set
382 * adns__qf_addr_answer on the parent query. This will let us detect a
383 * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME.
385 * If we detect a conflict of any kind, then at least one answer came back
386 * with a CNAME record, so we pick the first such answer (somewhat
387 * arbitrarily) as being the `right' canonical name, and set this in the
388 * parent query's answer->cname slot. We discard address records from the
389 * wrong name. And finally we cancel the outstanding child queries, and
390 * resubmit address queries for the address families we don't yet have, with
391 * adns__qf_addr_cname set so that we know that we're in the fixup state.
394 static adns_status
pap_addr(const parseinfo
*pai
, int rrty
, size_t rrsz
,
395 int *cbyte_io
, int max
, adns_rr_addr
*storeto
)
397 const byte
*dgram
= pai
->dgram
;
398 int af
, addrlen
, salen
;
399 struct in6_addr v6map
;
400 const void *oaddr
= dgram
+ *cbyte_io
;
401 int avail
= max
- *cbyte_io
;
407 if (pai
->qu
->flags
& adns_qf_domapv4
) {
408 if (avail
< 4) return adns_s_invaliddata
;
409 memset(v6map
.s6_addr
+ 0, 0x00, 10);
410 memset(v6map
.s6_addr
+ 10, 0xff, 2);
411 memcpy(v6map
.s6_addr
+ 12, oaddr
, 4);
412 oaddr
= v6map
.s6_addr
; avail
= sizeof(v6map
.s6_addr
);
413 if (step
< 0) step
= 4;
416 af
= AF_INET
; addrlen
= 4;
417 addrp
= &storeto
->addr
.inet
.sin_addr
;
418 salen
= sizeof(storeto
->addr
.inet
);
422 af
= AF_INET6
; addrlen
= 16;
423 addrp
= storeto
->addr
.inet6
.sin6_addr
.s6_addr
;
424 salen
= sizeof(storeto
->addr
.inet6
);
429 assert(offsetof(adns_rr_addr
, addr
) + salen
<= rrsz
);
430 if (addrlen
< avail
) return adns_s_invaliddata
;
431 if (step
< 0) step
= addrlen
;
433 memset(&storeto
->addr
, 0, salen
);
434 storeto
->len
= salen
;
435 storeto
->addr
.sa
.sa_family
= af
;
436 memcpy(addrp
, oaddr
, addrlen
);
441 static adns_status
pa_addr(const parseinfo
*pai
, int cbyte
,
442 int max
, void *datap
) {
443 int err
= pap_addr(pai
, pai
->qu
->answer
->type
& adns_rrt_typemask
,
444 pai
->qu
->answer
->rrsz
, &cbyte
, max
, datap
);
446 if (cbyte
!= max
) return adns_s_invaliddata
;
450 static int search_sortlist_sa(adns_state ads
, const struct sockaddr
*sa
)
452 const afinfo
*ai
= 0;
454 switch (sa
->sa_family
) {
455 case AF_INET
: ai
= &adns__inet_afinfo
; break;
456 case AF_INET6
: ai
= &adns__inet6_afinfo
; break;
460 return search_sortlist(ads
, sa
->sa_family
, ai
->sockaddr_to_inaddr(sa
));
463 static int dip_sockaddr(adns_state ads
,
464 const struct sockaddr
*sa
,
465 const struct sockaddr
*sb
)
467 if (!ads
->sortlist
) return 0;
468 return search_sortlist_sa(ads
, sa
) > search_sortlist_sa(ads
, sb
);
471 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
472 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
474 return dip_sockaddr(ads
, &ap
->addr
.sa
, &bp
->addr
.sa
);
477 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
478 const adns_state ads
= context
;
480 return di_addr(ads
, datap_a
, datap_b
);
483 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
487 switch (rrp
->addr
.inet
.sin_family
) {
492 CSP_ADDSTR("INET6 ");
495 err
= getnameinfo(&rrp
->addr
.sa
, rrp
->len
, buf
, sizeof(buf
), 0, 0,
496 NI_NUMERICHOST
); assert(!err
);
500 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
507 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
508 const adns_rr_addr
*rrp
= datap
;
510 return csp_addr(vb
,rrp
);
513 static unsigned addr_rrtypes(adns_state ads
, adns_rrtype type
,
516 adns_queryflags permitaf
= 0, hackaf
= 0;
519 if (!(qf
& (adns_qf_ipv4_only
| adns_qf_ipv6_only
)))
520 qf
|= adns_qf_ipv4_only
| adns_qf_ipv6_only
;
521 if (!(type
& adns__qtf_bigaddr
) || !(type
& adns__qtf_manyaf
))
522 qf
= (qf
& adns__qf_afmask
) | adns_qf_ipv4_only
;
523 else if (ads
->iflags
& adns_if_afmask
) {
524 if (ads
->iflags
& adns_if_af_v4only
) {
525 permitaf
|= adns_qf_ipv4_only
;
526 hackaf
|= adns_qf_domapv4
;
528 if (ads
->iflags
& adns_if_af_v6only
)
529 permitaf
|= adns_qf_ipv6_only
;
531 qf
&= hackaf
| permitaf
| ~adns__qf_afmask
;
534 if (qf
& adns_qf_ipv4_only
) want
|= addr_rf_a
;
535 if (qf
& adns_qf_ipv6_only
) want
|= addr_rf_aaaa
;
540 static int gsz_addr(adns_rrtype type
)
542 return type
& adns__qtf_bigaddr ?
543 sizeof(adns_rr_addr
) : sizeof(adns_rr_addr_v4only
);
546 static adns_status
append_addrs(adns_query qu
, adns_query from
, size_t rrsz
,
547 adns_rr_addr
**dp
, int *dlen
,
548 const adns_rr_addr
*sp
, int slen
)
550 size_t drrsz
= *dlen
*rrsz
, srrsz
= slen
*rrsz
;
553 if (!slen
) return adns_s_ok
;
554 p
= adns__alloc_interim(qu
, drrsz
+ srrsz
);
557 memcpy(p
, *dp
, drrsz
);
558 adns__free_interim(qu
, *dp
);
560 memcpy(p
+ drrsz
, sp
, srrsz
);
562 *dp
= (adns_rr_addr
*)p
;
563 if (from
&& qu
->expires
> from
->expires
) qu
->expires
= from
->expires
;
567 static void icb_addr(adns_query parent
, adns_query child
);
569 static void addr_subqueries(adns_query qu
, struct timeval now
,
570 adns_queryflags qf_extra
,
571 const byte
*qd_dgram
, int qd_dglen
)
575 adns_queryflags qf
= (qu
->flags
& ~adns_qf_search
) | qf_extra
;
576 adns_rrtype qtf
= qu
->answer
->type
& adns__qtf_deref
;
577 unsigned which
= qu
->ctx
.tinfo
.addr
.want
& ~qu
->ctx
.tinfo
.addr
.have
;
580 memset(&ctx
, 0, sizeof(ctx
));
581 ctx
.callback
= icb_addr
;
582 for (i
= 0; i
< addr_nrrtypes
; i
++) {
583 if (!(which
& (1 << i
))) continue;
584 err
= adns__mkquery_frdgram(qu
->ads
, &qu
->vb
, &id
, qd_dgram
, qd_dglen
,
585 DNS_HDRSIZE
, addr_all_rrtypes
[i
], qf
);
586 if (err
) goto x_error
;
587 err
= adns__internal_submit(qu
->ads
, &cqu
, &tinfo_addrsub
,
588 addr_all_rrtypes
[i
] | qtf
,
589 &qu
->vb
, id
, qf
, now
, &ctx
);
590 if (err
) goto x_error
;
591 cqu
->answer
->rrsz
= qu
->answer
->rrsz
;
593 LIST_LINK_TAIL_PART(qu
->children
, cqu
,siblings
.);
595 qu
->state
= query_childw
;
596 LIST_LINK_TAIL(qu
->ads
->childw
, qu
);
600 adns__query_fail(qu
, err
);
603 static adns_status
addr_submit(adns_query parent
, adns_query
*query_r
,
604 vbuf
*qumsg_vb
, int id
, unsigned want
,
605 adns_queryflags flags
, struct timeval now
,
608 /* This is effectively a substitute for adns__internal_submit, intended for
609 * the case where the caller (possibly) only wants a subset of the
610 * available record types. The memory management and callback rules are
611 * the same as for adns__internal_submit.
613 * Some differences: the query is linked onto the parent's children list
614 * before exit (though the parent's state is not changed, and it is not
615 * linked into the childw list queue); and we fiddle with the `tinfo'
616 * portion of the context structure (yes, modifying *ctx), since this is,
617 * in fact, the main purpose of this function.
620 adns_state ads
= parent
->ads
;
624 (adns_r_addr
& adns_rrt_reprmask
) |
625 (parent
->answer
->type
& ~adns_rrt_reprmask
);
627 ctx
->tinfo
.addr
.want
= want
;
628 ctx
->tinfo
.addr
.have
= 0;
629 err
= adns__internal_submit(ads
, &qu
, adns__findtype(adns_r_addr
),
630 type
, qumsg_vb
, id
, flags
, now
, ctx
);
634 LIST_LINK_TAIL_PART(parent
->children
, qu
, siblings
.);
639 static adns_status
copy_cname_from_child(adns_query parent
, adns_query child
)
641 adns_answer
*pans
= parent
->answer
, *cans
= child
->answer
;
642 size_t n
= strlen(cans
->cname
) + 1;
644 pans
->cname
= adns__alloc_preserved(parent
, n
);
645 if (!pans
->cname
) R_NOMEM
;
646 memcpy(pans
->cname
, cans
->cname
, n
);
650 static void done_addr_type(adns_query qu
, adns_rrtype type
)
651 { qu
->ctx
.tinfo
.addr
.have
|= addr_rrtypeflag(type
); }
653 static void icb_addr(adns_query parent
, adns_query child
)
655 adns_state ads
= parent
->ads
;
656 adns_answer
*pans
= parent
->answer
, *cans
= child
->answer
;
661 if (!(child
->flags
& adns__qf_addr_cname
) &&
662 (parent
->flags
& adns__qf_addr_answer
) &&
663 (!!pans
->cname
!= !!cans
->cname
||
664 (pans
->cname
&& strcmp(pans
->cname
, cans
->cname
) != 0))) {
665 /* We've detected an inconsistency in CNAME records, and must deploy
670 /* The child has a CNAME record, but the parent doesn't. We must
671 * discard all of the parent's addresses, and substitute the child's.
674 assert(pans
->rrsz
== cans
->rrsz
);
675 adns__free_interim(parent
, pans
->rrs
.bytes
);
676 adns__transfer_interim(child
, parent
, cans
->rrs
.bytes
);
677 pans
->rrs
.bytes
= cans
->rrs
.bytes
;
678 pans
->nrrs
= cans
->nrrs
;
679 parent
->ctx
.tinfo
.addr
.have
= 0;
680 done_addr_type(parent
, cans
->type
);
681 err
= copy_cname_from_child(parent
, child
); if (err
) goto x_err
;
684 /* We've settled on the CNAME (now) associated with the parent, which
685 * already has appropriate address records. Build a query datagram for
686 * this name so that we can issue child queries for the missing address
687 * families. The child's vbuf looks handy for this.
689 err
= adns__mkquery(ads
, &child
->vb
, &id
, pans
->cname
,
690 strlen(pans
->cname
), &tinfo_addrsub
,
691 adns_r_addr
, parent
->flags
);
694 /* Now cancel the remaining children, and try again with the CNAME we've
697 adns__cancel_children(parent
);
698 if (gettimeofday(&now
, 0)) goto x_gtod
;
699 addr_subqueries(parent
, now
, adns__qf_addr_cname
,
700 child
->vb
.buf
, child
->vb
.used
);
704 if (cans
->cname
&& !pans
->cname
) {
705 err
= copy_cname_from_child(parent
, child
);
709 if ((parent
->flags
& adns_qf_search
) &&
710 !pans
->cname
&& cans
->status
== adns_s_nxdomain
) {
711 /* We're searching a list of suffixes, this is the first answer, and it
712 * tells us that the name doesn't exist. Try the next one.
715 if (parent
->expires
> child
->expires
) parent
->expires
= child
->expires
;
716 adns__cancel_children(parent
);
717 adns__free_interim(parent
, pans
->rrs
.bytes
);
718 pans
->rrs
.bytes
= 0; pans
->nrrs
= 0;
719 if (gettimeofday(&now
, 0)) goto x_gtod
;
720 adns__search_next(ads
, parent
, now
);
724 if (cans
->status
&& cans
->status
!= adns_s_nodata
)
725 { err
= cans
->status
; goto x_err
; }
727 assert(pans
->rrsz
== cans
->rrsz
);
728 err
= append_addrs(parent
, child
, pans
->rrsz
,
729 &pans
->rrs
.addr
, &pans
->nrrs
,
730 cans
->rrs
.addr
, cans
->nrrs
);
732 done_addr_type(parent
, cans
->type
);
734 if (parent
->children
.head
) LIST_LINK_TAIL(ads
->childw
, parent
);
735 else if (!pans
->nrrs
) adns__query_fail(parent
, adns_s_nodata
);
736 else adns__query_done(parent
);
737 parent
->flags
|= adns__qf_addr_answer
;
741 adns__diag(ads
, -1, parent
, "gettimeofday failed: %s", strerror(errno
));
742 err
= adns_s_systemfail
;
746 adns__query_fail(parent
, err
);
749 static void qs_addr(adns_query qu
, struct timeval now
)
751 if (!qu
->ctx
.tinfo
.addr
.want
) {
752 qu
->ctx
.tinfo
.addr
.want
=
753 addr_rrtypes(qu
->ads
, qu
->answer
->type
, qu
->flags
);
754 qu
->ctx
.tinfo
.addr
.have
= 0;
756 addr_subqueries(qu
, now
, 0, qu
->query_dgram
, qu
->query_dglen
);
760 * _domain (pap,csp,cs)
764 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
765 char **domain_r
, parsedomain_flags flags
) {
769 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
770 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
772 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
774 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
777 dm
[pai
->qu
->vb
.used
]= 0;
778 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
784 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
786 if (!*domain
) CSP_ADDSTR(".");
790 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
791 const char *const *domainp
= datap
;
792 return csp_domain(vb
,*domainp
);
795 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
796 int max
, void *datap
) {
800 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
803 if (cbyte
!= max
) return adns_s_invaliddata
;
811 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
812 int max
, void *datap
) {
816 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
817 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
820 if (cbyte
!= max
) return adns_s_invaliddata
;
825 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
828 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
829 unsigned *want_io
, size_t addrsz
,
830 int *cbyte_io
, int count
, int dmstart
) {
832 unsigned typef
, want
= *want_io
;
833 int type
, class, rdlen
, rdend
, rdstart
, ownermatched
;
837 for (rri
=0, naddrs
=0; rri
<count
; rri
++) {
838 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
839 pai
->dglen
, cbyte_io
,
840 &type
, &class, &ttl
, &rdlen
, &rdstart
,
841 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
843 if (!ownermatched
|| class != DNS_CLASS_IN
) continue;
844 typef
= addr_rrtypeflag(type
);
845 if (!(want
& typef
)) continue;
847 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*addrsz
)) R_NOMEM
;
848 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
849 rdend
= rdstart
+ rdlen
;
850 st
= pap_addr(pai
, type
, addrsz
, &rdstart
, rdend
,
851 (adns_rr_addr
*)(pai
->qu
->vb
.buf
+ naddrs
*addrsz
));
853 if (rdstart
!= rdend
) return adns_s_invaliddata
;
857 st
= append_addrs(pai
->qu
, 0, addrsz
, &ha
->addrs
, &ha
->naddrs
,
858 (const adns_rr_addr
*)pai
->qu
->vb
.buf
, naddrs
);
860 ha
->astatus
= adns_s_ok
;
863 adns__isort(ha
->addrs
, naddrs
, addrsz
, pai
->qu
->vb
.buf
,
871 static void icb_hostaddr(adns_query parent
, adns_query child
) {
872 adns_answer
*cans
= child
->answer
;
873 adns_rr_hostaddr
*rrp
= child
->ctx
.pinfo
.hostaddr
;
874 adns_state ads
= parent
->ads
;
876 size_t addrsz
= gsz_addr(parent
->answer
->type
);
878 st
= cans
->status
== adns_s_nodata ? adns_s_ok
: cans
->status
;
881 assert(addrsz
== cans
->rrsz
);
882 st
= append_addrs(parent
, child
, addrsz
,
883 &rrp
->addrs
, &rrp
->naddrs
,
884 cans
->rrs
.addr
, cans
->nrrs
);
886 if (!rrp
->naddrs
) { st
= adns_s_nodata
; goto done
; }
888 if (!adns__vbuf_ensure(&parent
->vb
, addrsz
))
889 { st
= adns_s_nomemory
; goto done
; }
890 adns__isort(rrp
->addrs
, rrp
->naddrs
, addrsz
, parent
->vb
.buf
,
895 adns__free_interim(parent
, rrp
->addrs
);
896 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : 0;
900 if (parent
->children
.head
) {
901 LIST_LINK_TAIL(ads
->childw
,parent
);
903 adns__query_done(parent
);
907 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
908 int max
, adns_rr_hostaddr
*rrp
) {
914 adns_queryflags nflags
;
916 size_t addrsz
= gsz_addr(pai
->qu
->answer
->type
);
918 dmstart
= cbyte
= *cbyte_io
;
919 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
920 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
924 rrp
->astatus
= adns_s_ok
;
930 want
= addr_rrtypes(pai
->ads
, pai
->qu
->answer
->type
, pai
->qu
->flags
);
932 st
= pap_findaddrs(pai
, rrp
, &want
, addrsz
, &cbyte
, pai
->nscount
, dmstart
);
934 if (!want
) return adns_s_ok
;
936 st
= pap_findaddrs(pai
, rrp
, &want
, addrsz
, &cbyte
, pai
->arcount
, dmstart
);
938 if (!want
) return adns_s_ok
;
940 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
941 pai
->dgram
, pai
->dglen
, dmstart
,
942 adns_r_addr
, adns_qf_quoteok_query
);
946 ctx
.callback
= icb_hostaddr
;
947 ctx
.pinfo
.hostaddr
= rrp
;
949 nflags
= adns_qf_quoteok_query
| (pai
->qu
->flags
& adns__qf_afmask
);
950 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
952 st
= addr_submit(pai
->qu
, &nqu
, &pai
->qu
->vb
, id
, want
,
953 nflags
, pai
->now
, &ctx
);
959 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
960 int max
, void *datap
) {
961 adns_rr_hostaddr
*rrp
= datap
;
964 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
966 if (cbyte
!= max
) return adns_s_invaliddata
;
971 static int dip_hostaddr(adns_state ads
,
972 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
973 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
974 if (ap
->astatus
) return 0;
976 return dip_sockaddr(ads
, &ap
->addrs
[0].addr
.sa
, &bp
->addrs
[0].addr
.sa
);
979 static int di_hostaddr(adns_state ads
,
980 const void *datap_a
, const void *datap_b
) {
981 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
983 return dip_hostaddr(ads
, ap
,bp
);
986 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
988 size_t sz
= qu
->answer
->type
& adns__qtf_bigaddr ?
989 sizeof(adns_rr_addr
) : sizeof(adns_rr_addr_v4only
);
990 adns__makefinal_str(qu
,&rrp
->host
);
992 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*sz
);
996 static void mf_hostaddr(adns_query qu
, void *datap
) {
997 adns_rr_hostaddr
*rrp
= datap
;
999 mfp_hostaddr(qu
,rrp
);
1002 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
1008 st
= csp_domain(vb
,rrp
->host
); if (st
) return st
;
1011 CSP_ADDSTR(adns_errtypeabbrev(rrp
->astatus
));
1013 sprintf(buf
," %d ",rrp
->astatus
);
1016 CSP_ADDSTR(adns_errabbrev(rrp
->astatus
));
1019 errstr
= adns_strerror(rrp
->astatus
);
1020 st
= csp_qstring(vb
,errstr
,strlen(errstr
)); if (st
) return st
;
1022 if (rrp
->naddrs
>= 0) {
1024 for (i
=0; i
<rrp
->naddrs
; i
++) {
1026 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
1035 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
1036 const adns_rr_hostaddr
*rrp
= datap
;
1038 return csp_hostaddr(vb
,rrp
);
1045 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
,
1046 int max
, void *datap
) {
1047 const byte
*dgram
= pai
->dgram
;
1048 adns_rr_intstr
*rrp
= datap
;
1052 if (cbyte
+2 > max
) return adns_s_invaliddata
;
1055 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
1056 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1059 if (cbyte
!= max
) return adns_s_invaliddata
;
1063 static int di_mx_raw(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1064 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
1066 if (ap
->i
< bp
->i
) return 0;
1067 if (ap
->i
> bp
->i
) return 1;
1075 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
,
1076 int max
, void *datap
) {
1077 const byte
*dgram
= pai
->dgram
;
1078 adns_rr_inthostaddr
*rrp
= datap
;
1082 if (cbyte
+2 > max
) return adns_s_invaliddata
;
1085 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
1088 if (cbyte
!= max
) return adns_s_invaliddata
;
1092 static int di_mx(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1093 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
1095 if (ap
->i
< bp
->i
) return 0;
1096 if (ap
->i
> bp
->i
) return 1;
1097 return dip_hostaddr(ads
, &ap
->ha
, &bp
->ha
);
1101 * _inthostaddr (mf,cs)
1104 static void mf_inthostaddr(adns_query qu
, void *datap
) {
1105 adns_rr_inthostaddr
*rrp
= datap
;
1107 mfp_hostaddr(qu
,&rrp
->ha
);
1110 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
1111 const adns_rr_inthostaddr
*rrp
= datap
;
1114 sprintf(buf
,"%u ",rrp
->i
);
1117 return csp_hostaddr(vb
,&rrp
->ha
);
1124 static adns_status
cs_inthost(vbuf
*vb
, const void *datap
) {
1125 const adns_rr_intstr
*rrp
= datap
;
1128 sprintf(buf
,"%u ",rrp
->i
);
1130 return csp_domain(vb
,rrp
->str
);
1134 * _ptr (pa, +icb_ptr)
1137 static void icb_ptr(adns_query parent
, adns_query child
) {
1138 adns_answer
*cans
= child
->answer
;
1139 const union gen_addr
*queried
;
1140 const unsigned char *found
;
1141 adns_state ads
= parent
->ads
;
1144 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
1145 adns__query_fail(parent
,adns_s_inconsistent
);
1147 } else if (cans
->status
) {
1148 adns__query_fail(parent
,cans
->status
);
1152 queried
= &parent
->ctx
.tinfo
.ptr
.addr
.addr
;
1153 for (i
=0, found
=cans
->rrs
.bytes
; i
<cans
->nrrs
; i
++, found
+= cans
->rrsz
) {
1154 if (!memcmp(queried
,found
,cans
->rrsz
)) {
1155 if (!parent
->children
.head
) {
1156 adns__query_done(parent
);
1159 LIST_LINK_TAIL(ads
->childw
,parent
);
1165 adns__query_fail(parent
,adns_s_inconsistent
);
1168 static const struct ptr_expectdomain
{
1170 const char *const tail
[3];
1171 } ptr_expectdomain
[PTR_NDOMAIN
] = {
1172 { &adns__inet_afinfo
, { DNS_INADDR_ARPA
, 0 } },
1173 { &adns__inet6_afinfo
, { DNS_IP6_ARPA
, 0 } }
1176 static adns_status
ckl_ptr(adns_state ads
, adns_queryflags flags
,
1177 union checklabel_state
*css
, qcontext
*ctx
,
1178 int labnum
, const char *label
, int lablen
)
1181 unsigned f
= labnum ? css
->ptr
.domainmap
: (1 << PTR_NDOMAIN
) - 1;
1184 const struct ptr_expectdomain
*ed
;
1185 struct afinfo_addr
*ap
;
1188 for (ed
= ptr_expectdomain
, i
= 0, d
= 1;
1190 ed
++, i
++, d
<<= 1) {
1191 if (!(f
& d
)) continue;
1192 if (labnum
< ed
->ai
->nrevcomp
) {
1193 ac
= ed
->ai
->rev_parsecomp(label
, lablen
);
1194 if (ac
< 0) goto mismatch
;
1195 assert(labnum
< sizeof(css
->ptr
.ipv
[i
]));
1196 css
->ptr
.ipv
[i
][labnum
] = ac
;
1198 tp
= ed
->tail
[labnum
- ed
->ai
->nrevcomp
];
1199 if (!tp
|| strncmp(label
, tp
, lablen
) != 0 || tp
[lablen
])
1206 if (!f
) return adns_s_querydomainwrong
;
1210 for (ed
= ptr_expectdomain
, i
= 0, d
= 1;
1212 ed
++, i
++, d
<<= 1) {
1213 if (!(f
& d
)) continue;
1214 if (labnum
>= ed
->ai
->nrevcomp
&& !ed
->tail
[labnum
- ed
->ai
->nrevcomp
])
1215 { found
= i
; continue; }
1217 if (!f
) return adns_s_querydomainwrong
;
1219 assert(found
>= 0 && f
== (1 << found
));
1221 ed
= &ptr_expectdomain
[found
];
1222 ap
= &ctx
->tinfo
.ptr
.addr
;
1224 ed
->ai
->rev_mkaddr(&ap
->addr
, css
->ptr
.ipv
[found
]);
1227 css
->ptr
.domainmap
= f
;
1231 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
1232 int max
, void *datap
) {
1235 struct afinfo_addr
*ap
;
1241 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
1242 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1244 if (cbyte
!= max
) return adns_s_invaliddata
;
1246 ap
= &pai
->qu
->ctx
.tinfo
.ptr
.addr
;
1249 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
1250 pai
->dgram
, pai
->dglen
, dmstart
,
1251 ap
->ai
->rrtype
, adns_qf_quoteok_query
);
1255 ctx
.callback
= icb_ptr
;
1256 memset(&ctx
.pinfo
,0,sizeof(ctx
.pinfo
));
1257 memset(&ctx
.tinfo
,0,sizeof(ctx
.tinfo
));
1258 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(ap
->ai
->rrtype
),
1259 ap
->ai
->rrtype
, &pai
->qu
->vb
, id
,
1260 adns_qf_quoteok_query
, pai
->now
, &ctx
);
1263 nqu
->parent
= pai
->qu
;
1264 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
1272 static void mf_strpair(adns_query qu
, void *datap
) {
1273 adns_rr_strpair
*rrp
= datap
;
1275 adns__makefinal_str(qu
,&rrp
->array
[0]);
1276 adns__makefinal_str(qu
,&rrp
->array
[1]);
1283 static void mf_intstrpair(adns_query qu
, void *datap
) {
1284 adns_rr_intstrpair
*rrp
= datap
;
1286 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
1287 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
1294 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
1295 int max
, void *datap
) {
1296 adns_rr_intstrpair
*rrp
= datap
;
1300 for (i
=0; i
<2; i
++) {
1301 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
1305 if (cbyte
!= max
) return adns_s_invaliddata
;
1314 static adns_status
pap_mailbox822(const parseinfo
*pai
,
1315 int *cbyte_io
, int max
, char **mb_r
) {
1316 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
1317 const unsigned char *p
;
1319 findlabel_state fls
;
1325 adns__findlabel_start(&fls
, pai
->ads
,
1327 pai
->dgram
, pai
->dglen
, max
,
1328 *cbyte_io
, cbyte_io
);
1329 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
1331 adns__vbuf_appendstr(vb
,".");
1336 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
1338 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
1339 if (c
== '.' && !neednorm
) neednorm
= 1;
1340 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
1344 if (needquote
|| neednorm
) {
1345 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
1346 adns__vbuf_appendq(vb
,"\"",1);
1347 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
1349 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
1350 adns__vbuf_appendq(vb
,p
,1);
1352 adns__vbuf_appendq(vb
,"\"",1);
1354 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
1357 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
1359 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
1363 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
1364 memcpy(str
,vb
->buf
,vb
->used
);
1370 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
1372 if (pai
->qu
->typei
->typekey
& adns__qtf_mail822
) {
1373 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
1375 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
1379 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
1380 return csp_domain(vb
,mailbox
);
1387 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
1388 int max
, void *datap
) {
1389 adns_rr_strpair
*rrp
= datap
;
1392 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
1395 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
1398 if (cbyte
!= max
) return adns_s_invaliddata
;
1402 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
1403 const adns_rr_strpair
*rrp
= datap
;
1406 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
1408 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
1417 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
1418 int max
, void *datap
) {
1419 adns_rr_soa
*rrp
= datap
;
1420 const byte
*dgram
= pai
->dgram
;
1424 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
1425 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1428 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
1431 if (cbyte
+20 != max
) return adns_s_invaliddata
;
1433 for (i
=0; i
<5; i
++) {
1436 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
1442 static void mf_soa(adns_query qu
, void *datap
) {
1443 adns_rr_soa
*rrp
= datap
;
1445 adns__makefinal_str(qu
,&rrp
->mname
);
1446 adns__makefinal_str(qu
,&rrp
->rname
);
1449 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
1450 const adns_rr_soa
*rrp
= datap
;
1455 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
1457 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
1459 for (i
=0; i
<5; i
++) {
1460 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1468 * _srv* (pa*2,di,cs*2,ckl,postsort)
1471 static adns_status
ckl_srv(adns_state ads
, adns_queryflags flags
,
1472 union checklabel_state
*css
, qcontext
*ctx
,
1473 int labnum
, const char *label
, int lablen
)
1475 if (labnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1476 if (!lablen
|| label
[0] != '_') return adns_s_querydomaininvalid
;
1479 return adns__ckl_hostname(ads
, flags
, css
, ctx
, labnum
, label
, lablen
);
1482 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1484 /* might be adns_rr_srvraw* */) {
1485 const byte
*dgram
= pai
->dgram
;
1489 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1491 rrp
->priority
= GET_W(cbyte
, ti
);
1492 rrp
->weight
= GET_W(cbyte
, ti
);
1493 rrp
->port
= GET_W(cbyte
, ti
);
1497 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1498 int max
, void *datap
) {
1499 adns_rr_srvraw
*rrp
= datap
;
1502 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1505 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1506 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1509 if (cbyte
!= max
) return adns_s_invaliddata
;
1513 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1514 int max
, void *datap
) {
1515 adns_rr_srvha
*rrp
= datap
;
1518 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1519 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1520 if (cbyte
!= max
) return adns_s_invaliddata
;
1524 static void mf_srvraw(adns_query qu
, void *datap
) {
1525 adns_rr_srvraw
*rrp
= datap
;
1526 adns__makefinal_str(qu
, &rrp
->host
);
1529 static void mf_srvha(adns_query qu
, void *datap
) {
1530 adns_rr_srvha
*rrp
= datap
;
1531 mfp_hostaddr(qu
,&rrp
->ha
);
1534 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1535 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1536 /* might be const adns_rr_svhostaddr* */
1538 if (ap
->priority
< bp
->priority
) return 0;
1539 if (ap
->priority
> bp
->priority
) return 1;
1543 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1544 /* might be adns_rr_srvraw* */) {
1546 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1551 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1552 const adns_rr_srvraw
*rrp
= datap
;
1555 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1556 return csp_domain(vb
,rrp
->host
);
1559 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1560 const adns_rr_srvha
*rrp
= datap
;
1563 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1564 return csp_hostaddr(vb
,&rrp
->ha
);
1567 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,
1568 const struct typeinfo
*typei
) {
1569 /* we treat everything in the array as if it were an adns_rr_srvha
1570 * even though the array might be of adns_rr_srvraw. That's OK
1571 * because they have the same prefix, which is all we access.
1572 * We use typei->rrsz, too, rather than naive array indexing, of course.
1574 char *workbegin
, *workend
, *search
, *arrayend
;
1575 const adns_rr_srvha
*rr
;
1576 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1577 int cpriority
, totalweight
, runtotal
;
1580 for (workbegin
= array
, arrayend
= workbegin
+ typei
->rrsz
* nrrs
;
1581 workbegin
< arrayend
;
1582 workbegin
= workend
) {
1583 cpriority
= (rr
=(void*)workbegin
)->priority
;
1585 for (workend
= workbegin
, totalweight
= 0;
1586 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1587 workend
+= typei
->rrsz
) {
1588 totalweight
+= rr
->weight
;
1591 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1592 * cpriority. From now on, workbegin points to the `remaining'
1593 * records: we select one record at a time (RFC2782 `Usage rules'
1594 * and `Format of the SRV RR' subsection `Weight') to place at
1595 * workbegin (swapping with the one that was there, and then
1596 * advance workbegin. */
1598 workbegin
+ typei
->rrsz
< workend
; /* don't bother if just one */
1599 workbegin
+= typei
->rrsz
) {
1601 randval
= nrand48(ads
->rand48xsubi
);
1602 randval
%= (totalweight
+ 1);
1603 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1604 * totalweight must be <= 2^26 so probability nonuniformity is
1605 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1606 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1609 for (search
=workbegin
, runtotal
=0;
1610 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1611 search
+= typei
->rrsz
);
1612 assert(search
< arrayend
);
1613 totalweight
-= rr
->weight
;
1614 if (search
!= workbegin
) {
1615 memcpy(&rrtmp
, workbegin
, typei
->rrsz
);
1616 memcpy(workbegin
, search
, typei
->rrsz
);
1617 memcpy(search
, &rrtmp
, typei
->rrsz
);
1622 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1623 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1624 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1632 static void mf_byteblock(adns_query qu
, void *datap
) {
1633 adns_rr_byteblock
*rrp
= datap
;
1634 void *bytes
= rrp
->data
;
1635 adns__makefinal_block(qu
,&bytes
,rrp
->len
);
1643 static adns_status
pa_opaque(const parseinfo
*pai
, int cbyte
,
1644 int max
, void *datap
) {
1645 adns_rr_byteblock
*rrp
= datap
;
1647 rrp
->len
= max
- cbyte
;
1648 rrp
->data
= adns__alloc_interim(pai
->qu
, rrp
->len
);
1649 if (!rrp
->data
) R_NOMEM
;
1650 memcpy(rrp
->data
, pai
->dgram
+ cbyte
, rrp
->len
);
1654 static adns_status
cs_opaque(vbuf
*vb
, const void *datap
) {
1655 const adns_rr_byteblock
*rrp
= datap
;
1660 sprintf(buf
,"\\# %d",rrp
->len
);
1663 for (l
= rrp
->len
, p
= rrp
->data
;
1666 sprintf(buf
," %02x%02x%02x%02x",p
[0],p
[1],p
[2],p
[3]);
1672 sprintf(buf
," %02x",*p
);
1682 static void mf_flat(adns_query qu
, void *data
) { }
1688 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1690 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
1691 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
1693 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1694 { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), \
1695 mf_##memb, printer,parser,comparer, adns__ckl_hostname,0,0,0 }
1696 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1697 { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), \
1698 mf_flat, printer,parser,comparer, adns__ckl_hostname,0,0,0 }
1699 #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer, \
1700 makefinal,ckl,postsort,getrrsz,sender) \
1701 { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), makefinal, \
1702 printer,parser,comparer,ckl,postsort,getrrsz,sender }
1704 static const typeinfo typeinfos
[] = {
1705 /* Must be in ascending order of rrtype ! */
1706 /* mem-mgmt code rrt fmt member parser comparer printer */
1708 FLAT_TYPE(a
, "A", 0, inaddr
, pa_inaddr
, di_inaddr
,cs_inaddr
),
1709 DEEP_TYPE(ns_raw
, "NS", "raw",str
, pa_host_raw
,0, cs_domain
),
1710 DEEP_TYPE(cname
, "CNAME", 0, str
, pa_dom_raw
, 0, cs_domain
),
1711 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, pa_soa
, 0, cs_soa
),
1712 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, pa_host_raw
,0, cs_domain
),
1713 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,pa_hinfo
, 0, cs_hinfo
),
1714 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, pa_mx_raw
, di_mx_raw
,cs_inthost
),
1715 DEEP_TYPE(txt
, "TXT", 0, manyistr
,pa_txt
, 0, cs_txt
),
1716 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, pa_rp
, 0, cs_rp
),
1717 FLAT_TYPE(aaaa
, "AAAA", 0, in6addr
, pa_in6addr
, di_in6addr
,cs_in6addr
),
1718 XTRA_TYPE(srv_raw
,"SRV", "raw",srvraw
, pa_srvraw
, di_srv
, cs_srvraw
,
1719 mf_srvraw
, ckl_srv
, postsort_srv
, 0, 0),
1721 XTRA_TYPE(addr
, "A", "addr", addr
, pa_addr
, di_addr
, cs_addr
,
1722 mf_flat
, adns__ckl_hostname
, 0, gsz_addr
, qs_addr
),
1723 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
,pa_hostaddr
,di_hostaddr
,cs_hostaddr
),
1724 XTRA_TYPE(ptr
, "PTR","checked",str
, pa_ptr
, 0, cs_domain
,
1725 mf_str
, ckl_ptr
, 0, 0, 0),
1726 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,pa_mx
, di_mx
, cs_inthostaddr
),
1727 XTRA_TYPE(srv
, "SRV","+addr",srvha
, pa_srvha
, di_srv
, cs_srvha
,
1728 mf_srvha
, ckl_srv
, postsort_srv
, 0, 0),
1730 DEEP_TYPE(soa
, "SOA","822", soa
, pa_soa
, 0, cs_soa
),
1731 DEEP_TYPE(rp
, "RP", "822", strpair
, pa_rp
, 0, cs_rp
),
1734 static const typeinfo tinfo_addrsub
=
1735 XTRA_TYPE(none
, "<addr>","sub",addr
, pa_addr
, 0, cs_addr
,
1736 mf_flat
, adns__ckl_hostname
, 0, gsz_addr
, 0);
1738 static const typeinfo typeinfo_unknown
=
1739 DEEP_TYPE(unknown
,0, "unknown",byteblock
,pa_opaque
, 0, cs_opaque
);
1741 const typeinfo
*adns__findtype(adns_rrtype type
) {
1742 const typeinfo
*begin
, *end
, *mid
;
1744 if (type
& adns_r_unknown
) return &typeinfo_unknown
;
1745 type
&= adns_rrt_reprmask
;
1747 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1749 while (begin
< end
) {
1750 mid
= begin
+ ((end
-begin
)>>1);
1751 if (mid
->typekey
== type
) return mid
;
1752 if (type
> mid
->typekey
) begin
= mid
+1;