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* (qdpl,(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 /* About CNAME handling in addr queries.
344 * A user-level addr query is translated into a number of protocol-level
345 * queries, and its job is to reassemble the results. This gets tricky if
346 * the answers aren't consistent. In particular, if the answers report
347 * inconsistent indirection via CNAME records (e.g., different CNAMEs, or
348 * some indirect via a CNAME, and some don't) then we have trouble.
350 * Once we've received an answer, even if it was NODATA, we set
351 * adns__qf_addr_answer on the parent query. This will let us detect a
352 * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME.
354 * If we detect a conflict of any kind, then at least one answer came back
355 * with a CNAME record, so we pick the first such answer (somewhat
356 * arbitrarily) as being the `right' canonical name, and set this in the
357 * parent query's answer->cname slot. We discard address records from the
358 * wrong name. And finally we cancel the outstanding child queries, and
359 * resubmit address queries for the address families we don't yet have, with
360 * adns__qf_addr_cname set so that we know that we're in the fixup state.
363 static adns_status
pap_addr(const parseinfo
*pai
, int rrty
, size_t rrsz
,
364 int *cbyte_io
, int max
, adns_rr_addr
*storeto
)
366 const byte
*dgram
= pai
->dgram
;
367 int af
, addrlen
, salen
;
368 struct in6_addr v6map
;
369 const void *oaddr
= dgram
+ *cbyte_io
;
370 int avail
= max
- *cbyte_io
;
376 if (pai
->qu
->flags
& adns_qf_domapv4
) {
377 if (avail
< 4) return adns_s_invaliddata
;
378 memset(v6map
.s6_addr
+ 0, 0x00, 10);
379 memset(v6map
.s6_addr
+ 10, 0xff, 2);
380 memcpy(v6map
.s6_addr
+ 12, oaddr
, 4);
381 oaddr
= v6map
.s6_addr
; avail
= sizeof(v6map
.s6_addr
);
382 if (step
< 0) step
= 4;
385 af
= AF_INET
; addrlen
= 4;
386 addrp
= &storeto
->addr
.inet
.sin_addr
;
387 salen
= sizeof(storeto
->addr
.inet
);
391 af
= AF_INET6
; addrlen
= 16;
392 addrp
= storeto
->addr
.inet6
.sin6_addr
.s6_addr
;
393 salen
= sizeof(storeto
->addr
.inet6
);
398 assert(offsetof(adns_rr_addr
, addr
) + salen
<= rrsz
);
399 if (addrlen
< avail
) return adns_s_invaliddata
;
400 if (step
< 0) step
= addrlen
;
402 memset(&storeto
->addr
, 0, salen
);
403 storeto
->len
= salen
;
404 storeto
->addr
.sa
.sa_family
= af
;
405 memcpy(addrp
, oaddr
, addrlen
);
410 static adns_status
pa_addr(const parseinfo
*pai
, int cbyte
,
411 int max
, void *datap
) {
412 int err
= pap_addr(pai
, pai
->qu
->answer
->type
& adns_rrt_typemask
,
413 pai
->qu
->answer
->rrsz
, &cbyte
, max
, datap
);
415 if (cbyte
!= max
) return adns_s_invaliddata
;
419 static int search_sortlist_sa(adns_state ads
, const struct sockaddr
*sa
)
421 const afinfo
*ai
= 0;
423 switch (sa
->sa_family
) {
424 case AF_INET
: ai
= &adns__inet_afinfo
; break;
425 case AF_INET6
: ai
= &adns__inet6_afinfo
; break;
429 return search_sortlist(ads
, sa
->sa_family
, ai
->sockaddr_to_inaddr(sa
));
432 static int dip_sockaddr(adns_state ads
,
433 const struct sockaddr
*sa
,
434 const struct sockaddr
*sb
)
436 if (!ads
->sortlist
) return 0;
437 return search_sortlist_sa(ads
, sa
) > search_sortlist_sa(ads
, sb
);
440 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
441 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
443 return dip_sockaddr(ads
, &ap
->addr
.sa
, &bp
->addr
.sa
);
446 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
447 const adns_state ads
= context
;
449 return di_addr(ads
, datap_a
, datap_b
);
452 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
456 switch (rrp
->addr
.inet
.sin_family
) {
461 CSP_ADDSTR("INET6 ");
464 err
= getnameinfo(&rrp
->addr
.sa
, rrp
->len
, buf
, sizeof(buf
), 0, 0,
465 NI_NUMERICHOST
); assert(!err
);
469 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
476 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
477 const adns_rr_addr
*rrp
= datap
;
479 return csp_addr(vb
,rrp
);
482 static void addr_rrtypes(adns_state ads
, adns_rrtype type
,
484 adns_rrtype
*rrty
, size_t *nrrty
)
487 adns_rrtype qtf
= type
& adns__qtf_deref
;
488 adns_queryflags permitaf
= 0, hackaf
= 0;
490 if (!(qf
& (adns_qf_ipv4_only
| adns_qf_ipv6_only
)))
491 qf
|= adns_qf_ipv4_only
| adns_qf_ipv6_only
;
492 if (!(type
& adns__qtf_bigaddr
) || !(type
& adns__qtf_manyaf
))
493 qf
= (qf
& adns__qf_afmask
) | adns_qf_ipv4_only
;
494 else if (ads
->iflags
& adns_if_afmask
) {
495 if (ads
->iflags
& adns_if_af_v4only
) {
496 permitaf
|= adns_qf_ipv4_only
;
497 hackaf
|= adns_qf_domapv4
;
499 if (ads
->iflags
& adns_if_af_v6only
)
500 permitaf
|= adns_qf_ipv6_only
;
502 qf
&= hackaf
| permitaf
| ~adns__qf_afmask
;
505 if (qf
& adns_qf_ipv4_only
) rrty
[n
++] = adns_r_a
| qtf
;
506 if (qf
& adns_qf_ipv6_only
) rrty
[n
++] = adns_r_aaaa
| qtf
;
511 static int gsz_addr(adns_rrtype type
)
513 return type
& adns__qtf_bigaddr ?
514 sizeof(adns_rr_addr
) : sizeof(adns_rr_addr_v4only
);
517 static adns_status
append_addrs(adns_query qu
, adns_query from
, size_t rrsz
,
518 adns_rr_addr
**dp
, int *dlen
,
519 const adns_rr_addr
*sp
, int slen
)
521 size_t drrsz
= *dlen
*rrsz
, srrsz
= slen
*rrsz
;
524 /* if (!slen) return adns_s_ok; */
525 p
= adns__alloc_interim(qu
, drrsz
+ srrsz
);
528 memcpy(p
, *dp
, drrsz
);
529 adns__free_interim(qu
, *dp
);
531 memcpy(p
+ drrsz
, sp
, srrsz
);
533 *dp
= (adns_rr_addr
*)p
;
534 if (from
&& qu
->expires
> from
->expires
) qu
->expires
= from
->expires
;
538 static void icb_addr(adns_query parent
, adns_query child
);
540 static void addr_subqueries(adns_query qu
, struct timeval now
,
541 const byte
*qd_dgram
, int qd_dglen
)
546 (qu
->flags
| adns__qf_senddirect
) &
550 /* This always makes child queries, even if there's only the one. This
551 * seems wasteful, but there's only one case where it'd be safe -- namely
552 * IPv4-only -- and that's not the case I want to optimize.
554 memset(&ctx
, 0, sizeof(ctx
));
555 ctx
.callback
= icb_addr
;
556 qu
->t
.addr
.onrrty
= qu
->t
.addr
.nrrty
;
557 for (i
= 0; i
< qu
->t
.addr
.nrrty
; i
++) {
558 err
= adns__mkquery_frdgram(qu
->ads
, &qu
->vb
, &id
, qd_dgram
, qd_dglen
,
559 DNS_HDRSIZE
, qu
->t
.addr
.rrty
[i
], qf
);
560 if (err
) goto x_error
;
561 err
= adns__internal_submit(qu
->ads
, &cqu
, qu
->typei
, qu
->t
.addr
.rrty
[i
],
562 &qu
->vb
, id
, qf
, now
, &ctx
);
563 if (err
) goto x_error
;
564 cqu
->answer
->rrsz
= qu
->answer
->rrsz
;
566 LIST_LINK_TAIL_PART(qu
->children
, cqu
,siblings
.);
568 qu
->state
= query_childw
;
569 LIST_LINK_TAIL(qu
->ads
->childw
, qu
);
573 adns__query_fail(qu
, err
);
576 static adns_status
addr_submit(adns_query parent
, adns_query
*query_r
,
577 vbuf
*qumsg_vb
, int id
,
578 const adns_rrtype
*rrty
, size_t nrrty
,
579 adns_queryflags flags
, struct timeval now
,
582 /* This is effectively a substitute for adns__internal_submit, intended for
583 * the case where the caller (possibly) only wants a subset of the
584 * available record types. The memory management and callback rules are
585 * the same as for adns__internal_submit.
587 * Some differences: the query is linked onto the parent's children list
588 * before exit (though the parent's state is not changed, and it is not
589 * linked into the childw list queue).
592 adns_state ads
= parent
->ads
;
596 (adns_r_addr
& adns_rrt_reprmask
) |
597 (parent
->answer
->type
& ~adns_rrt_reprmask
);
599 err
= adns__internal_submit(ads
, &qu
, adns__findtype(adns_r_addr
),
600 type
, qumsg_vb
, id
, flags
| adns__qf_nosend
,
605 LIST_LINK_TAIL_PART(parent
->children
, qu
, siblings
.);
607 memcpy(qu
->t
.addr
.rrty
, rrty
, nrrty
*sizeof(*rrty
));
608 qu
->t
.addr
.nrrty
= nrrty
;
609 addr_subqueries(qu
, now
, qu
->query_dgram
, qu
->query_dglen
);
614 static adns_status
copy_cname_from_child(adns_query parent
, adns_query child
)
616 adns_answer
*pans
= parent
->answer
, *cans
= child
->answer
;
617 size_t n
= strlen(cans
->cname
) + 1;
619 pans
->cname
= adns__alloc_preserved(parent
, n
);
620 if (!pans
->cname
) R_NOMEM
;
621 memcpy(pans
->cname
, cans
->cname
, n
);
625 static void done_addr_type(adns_query qu
, adns_rrtype type
)
629 for (i
= 0; i
< qu
->t
.addr
.nrrty
&& type
!= qu
->t
.addr
.rrty
[i
]; i
++);
630 assert(i
< qu
->t
.addr
.nrrty
);
631 qu
->t
.addr
.rrty
[i
] = qu
->t
.addr
.rrty
[--qu
->t
.addr
.nrrty
];
632 qu
->t
.addr
.rrty
[qu
->t
.addr
.nrrty
] = type
;
635 static void icb_addr(adns_query parent
, adns_query child
)
637 adns_state ads
= parent
->ads
;
638 adns_answer
*pans
= parent
->answer
, *cans
= child
->answer
;
639 struct timeval tvbuf
;
641 const struct timeval
*now
= 0;
644 if (!(child
->flags
& adns__qf_addr_cname
) &&
645 (parent
->flags
& adns__qf_addr_answer
) &&
646 (!pans
->cname
!= !cans
->cname
||
647 (pans
->cname
&& strcmp(pans
->cname
, pans
->cname
) != 0))) {
648 /* We've detected an inconsistency in CNAME records, and must deploy
653 /* The child has a CNAME record, but the parent doesn't. We must
654 * discard all of the parent's addresses, and substitute the child's.
657 assert(pans
->rrsz
== cans
->rrsz
);
658 adns__free_interim(parent
, pans
->rrs
.bytes
);
659 adns__transfer_interim(child
, parent
, cans
->rrs
.bytes
);
660 pans
->rrs
.bytes
= cans
->rrs
.bytes
;
661 pans
->nrrs
= cans
->nrrs
;
662 parent
->t
.addr
.nrrty
= parent
->t
.addr
.onrrty
;
663 done_addr_type(parent
, cans
->type
);
664 err
= copy_cname_from_child(parent
, child
); if (err
) goto x_err
;
667 /* We've settled on the CNAME (now) associated with the parent, which
668 * already has appropriate address records. Build a query datagram for
669 * this name so that we can issue child queries for the missing address
670 * families. The child's vbuf looks handy for this.
672 err
= adns__mkquery(ads
, &child
->vb
, &id
, pans
->cname
,
673 strlen(pans
->cname
), adns__findtype(adns_r_addr
),
674 adns_r_addr
, parent
->flags
);
677 /* Now cancel the remaining children, and try again with the CNAME we've
680 adns__cancel_children(parent
);
681 adns__must_gettimeofday(ads
, &now
, &tvbuf
);
682 if (now
) addr_subqueries(parent
, *now
, child
->vb
.buf
, child
->vb
.used
);
686 if (cans
->cname
&& !pans
->cname
) {
687 err
= copy_cname_from_child(parent
, child
);
691 if ((parent
->flags
& adns_qf_search
) &&
692 !pans
->cname
&& cans
->status
== adns_s_nxdomain
) {
693 /* We're searching a list of suffixes, this is the first answer, and it
694 * tells us that the name doesn't exist. Try the next one.
697 if (parent
->expires
> child
->expires
) parent
->expires
= child
->expires
;
698 adns__cancel_children(parent
);
699 adns__free_interim(parent
, pans
->rrs
.bytes
);
700 pans
->rrs
.bytes
= 0; pans
->nrrs
= 0;
701 adns__must_gettimeofday(ads
, &now
, &tvbuf
);
702 if (now
) adns__search_next(ads
, parent
, *now
);
706 if (cans
->status
&& cans
->status
!= adns_s_nodata
)
707 { err
= cans
->status
; goto x_err
; }
709 assert(pans
->rrsz
== cans
->rrsz
);
710 err
= append_addrs(parent
, child
, pans
->rrsz
,
711 &pans
->rrs
.addr
, &pans
->nrrs
,
712 cans
->rrs
.addr
, cans
->nrrs
);
714 done_addr_type(parent
, cans
->type
);
716 if (parent
->children
.head
) LIST_LINK_TAIL(ads
->childw
, parent
);
717 else if (!pans
->nrrs
) adns__query_fail(parent
, adns_s_nodata
);
718 else adns__query_done(parent
);
719 parent
->flags
|= adns__qf_addr_answer
;
723 adns__query_fail(parent
, err
);
726 static void qs_addr(adns_query qu
, struct timeval now
)
728 addr_rrtypes(qu
->ads
, qu
->answer
->type
, qu
->flags
,
729 qu
->t
.addr
.rrty
, &qu
->t
.addr
.nrrty
);
730 addr_subqueries(qu
, now
, qu
->query_dgram
, qu
->query_dglen
);
734 * _domain (pap,csp,cs)
738 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
739 char **domain_r
, parsedomain_flags flags
) {
743 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
744 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
746 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
748 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
751 dm
[pai
->qu
->vb
.used
]= 0;
752 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
758 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
760 if (!*domain
) CSP_ADDSTR(".");
764 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
765 const char *const *domainp
= datap
;
766 return csp_domain(vb
,*domainp
);
769 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
770 int max
, void *datap
) {
774 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
777 if (cbyte
!= max
) return adns_s_invaliddata
;
785 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
786 int max
, void *datap
) {
790 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
791 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
794 if (cbyte
!= max
) return adns_s_invaliddata
;
799 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
802 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
803 adns_rrtype
*rrty
, size_t *nrrty_io
,
804 size_t addrsz
, int *cbyte_io
, int count
,
807 int type
, class, rdlen
, rdend
, rdstart
, ownermatched
;
808 size_t nrrty
= *nrrty_io
;
812 for (rri
=0, naddrs
=0; rri
<count
; rri
++) {
813 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
814 pai
->dglen
, cbyte_io
,
815 &type
, &class, &ttl
, &rdlen
, &rdstart
,
816 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
818 if (!ownermatched
|| class != DNS_CLASS_IN
) continue;
819 for (j
= 0; j
< nrrty
&& type
!= (rrty
[j
] & adns_rrt_typemask
); j
++);
820 if (j
>= nrrty
) continue;
823 adns_rrtype t
= rrty
[j
];
824 rrty
[j
] = rrty
[*nrrty_io
];
827 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*addrsz
)) R_NOMEM
;
828 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
829 rdend
= rdstart
+ rdlen
;
830 st
= pap_addr(pai
, type
, addrsz
, &rdstart
, rdend
,
831 (adns_rr_addr
*)(pai
->qu
->vb
.buf
+ naddrs
*addrsz
));
833 if (rdstart
!= rdend
) return adns_s_invaliddata
;
837 st
= append_addrs(pai
->qu
, 0, addrsz
, &ha
->addrs
, &ha
->naddrs
,
838 (const adns_rr_addr
*)pai
->qu
->vb
.buf
, naddrs
);
840 ha
->astatus
= adns_s_ok
;
843 adns__isort(ha
->addrs
, naddrs
, addrsz
, pai
->qu
->vb
.buf
,
850 static void icb_hostaddr(adns_query parent
, adns_query child
) {
851 adns_answer
*cans
= child
->answer
;
852 adns_rr_hostaddr
*rrp
= child
->ctx
.info
.hostaddr
;
853 adns_state ads
= parent
->ads
;
855 size_t addrsz
= gsz_addr(parent
->answer
->type
);
857 st
= cans
->status
== adns_s_nodata ? adns_s_ok
: cans
->status
;
860 assert(addrsz
== cans
->rrsz
);
861 st
= append_addrs(parent
, child
, addrsz
,
862 &rrp
->addrs
, &rrp
->naddrs
,
863 cans
->rrs
.addr
, cans
->nrrs
);
865 if (!rrp
->naddrs
) { st
= adns_s_nodata
; goto done
; }
867 if (!adns__vbuf_ensure(&parent
->vb
, addrsz
))
868 { st
= adns_s_nomemory
; goto done
; }
869 adns__isort(rrp
->addrs
, rrp
->naddrs
, addrsz
, parent
->vb
.buf
,
874 adns__free_interim(parent
, rrp
->addrs
);
875 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : 0;
879 if (parent
->children
.head
) {
880 LIST_LINK_TAIL(ads
->childw
,parent
);
882 adns__query_done(parent
);
886 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
887 int max
, adns_rr_hostaddr
*rrp
) {
893 adns_queryflags nflags
;
894 adns_rrtype rrty
[ADDR_MAXRRTYPES
];
896 size_t addrsz
= gsz_addr(pai
->qu
->answer
->type
);
898 dmstart
= cbyte
= *cbyte_io
;
899 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
900 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
904 rrp
->astatus
= adns_s_ok
;
910 addr_rrtypes(pai
->ads
, pai
->qu
->answer
->type
,
911 pai
->qu
->flags
, rrty
, &nrrty
);
913 st
= pap_findaddrs(pai
, rrp
, rrty
, &nrrty
, addrsz
,
914 &cbyte
, pai
->nscount
, dmstart
);
916 if (!nrrty
) return adns_s_ok
;
918 st
= pap_findaddrs(pai
, rrp
, rrty
, &nrrty
, addrsz
,
919 &cbyte
, pai
->arcount
, dmstart
);
921 if (!nrrty
) return adns_s_ok
;
923 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
924 pai
->dgram
, pai
->dglen
, dmstart
,
925 adns_r_addr
, adns_qf_quoteok_query
);
929 ctx
.callback
= icb_hostaddr
;
930 ctx
.info
.hostaddr
= rrp
;
932 nflags
= adns_qf_quoteok_query
| (pai
->qu
->flags
& adns__qf_afmask
);
933 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
935 st
= addr_submit(pai
->qu
, &nqu
, &pai
->qu
->vb
, id
, rrty
, nrrty
,
936 nflags
, pai
->now
, &ctx
);
942 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
943 int max
, void *datap
) {
944 adns_rr_hostaddr
*rrp
= datap
;
947 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
949 if (cbyte
!= max
) return adns_s_invaliddata
;
954 static int dip_hostaddr(adns_state ads
,
955 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
956 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
957 if (ap
->astatus
) return 0;
959 return dip_sockaddr(ads
, &ap
->addrs
[0].addr
.sa
, &bp
->addrs
[0].addr
.sa
);
962 static int di_hostaddr(adns_state ads
,
963 const void *datap_a
, const void *datap_b
) {
964 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
966 return dip_hostaddr(ads
, ap
,bp
);
969 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
971 size_t sz
= qu
->answer
->type
& adns__qtf_bigaddr ?
972 sizeof(adns_rr_addr
) : sizeof(adns_rr_addr_v4only
);
973 adns__makefinal_str(qu
,&rrp
->host
);
975 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*sz
);
979 static void mf_hostaddr(adns_query qu
, void *datap
) {
980 adns_rr_hostaddr
*rrp
= datap
;
982 mfp_hostaddr(qu
,rrp
);
985 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
991 st
= csp_domain(vb
,rrp
->host
); if (st
) return st
;
994 CSP_ADDSTR(adns_errtypeabbrev(rrp
->astatus
));
996 sprintf(buf
," %d ",rrp
->astatus
);
999 CSP_ADDSTR(adns_errabbrev(rrp
->astatus
));
1002 errstr
= adns_strerror(rrp
->astatus
);
1003 st
= csp_qstring(vb
,errstr
,strlen(errstr
)); if (st
) return st
;
1005 if (rrp
->naddrs
>= 0) {
1007 for (i
=0; i
<rrp
->naddrs
; i
++) {
1009 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
1018 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
1019 const adns_rr_hostaddr
*rrp
= datap
;
1021 return csp_hostaddr(vb
,rrp
);
1028 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
,
1029 int max
, void *datap
) {
1030 const byte
*dgram
= pai
->dgram
;
1031 adns_rr_intstr
*rrp
= datap
;
1035 if (cbyte
+2 > max
) return adns_s_invaliddata
;
1038 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
1039 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1042 if (cbyte
!= max
) return adns_s_invaliddata
;
1046 static int di_mx_raw(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1047 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
1049 if (ap
->i
< bp
->i
) return 0;
1050 if (ap
->i
> bp
->i
) return 1;
1058 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
,
1059 int max
, void *datap
) {
1060 const byte
*dgram
= pai
->dgram
;
1061 adns_rr_inthostaddr
*rrp
= datap
;
1065 if (cbyte
+2 > max
) return adns_s_invaliddata
;
1068 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
1071 if (cbyte
!= max
) return adns_s_invaliddata
;
1075 static int di_mx(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1076 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
1078 if (ap
->i
< bp
->i
) return 0;
1079 if (ap
->i
> bp
->i
) return 1;
1080 return dip_hostaddr(ads
, &ap
->ha
, &bp
->ha
);
1084 * _inthostaddr (mf,cs)
1087 static void mf_inthostaddr(adns_query qu
, void *datap
) {
1088 adns_rr_inthostaddr
*rrp
= datap
;
1090 mfp_hostaddr(qu
,&rrp
->ha
);
1093 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
1094 const adns_rr_inthostaddr
*rrp
= datap
;
1097 sprintf(buf
,"%u ",rrp
->i
);
1100 return csp_hostaddr(vb
,&rrp
->ha
);
1107 static adns_status
cs_inthost(vbuf
*vb
, const void *datap
) {
1108 const adns_rr_intstr
*rrp
= datap
;
1111 sprintf(buf
,"%u ",rrp
->i
);
1113 return csp_domain(vb
,rrp
->str
);
1117 * _ptr (pa, +icb_ptr)
1120 static void icb_ptr(adns_query parent
, adns_query child
) {
1121 adns_answer
*cans
= child
->answer
;
1122 const union gen_addr
*queried
;
1123 const unsigned char *found
;
1124 adns_state ads
= parent
->ads
;
1127 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
1128 adns__query_fail(parent
,adns_s_inconsistent
);
1130 } else if (cans
->status
) {
1131 adns__query_fail(parent
,cans
->status
);
1135 queried
= &parent
->ctx
.info
.ptr_parent_addr
.addr
;
1136 for (i
=0, found
=cans
->rrs
.bytes
; i
<cans
->nrrs
; i
++, found
+= cans
->rrsz
) {
1137 if (!memcmp(queried
,found
,cans
->rrsz
)) {
1138 if (!parent
->children
.head
) {
1139 adns__query_done(parent
);
1142 LIST_LINK_TAIL(ads
->childw
,parent
);
1148 adns__query_fail(parent
,adns_s_inconsistent
);
1151 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
1152 int max
, void *datap
) {
1153 static const struct {
1155 const char *const tail
[3];
1156 } expectdomain
[] = {
1157 { &adns__inet_afinfo
, { DNS_INADDR_ARPA
, 0 } },
1158 { &adns__inet6_afinfo
, { DNS_IP6_ARPA
, 0 } }
1160 enum { n_ed
= sizeof(expectdomain
)/sizeof(expectdomain
[0]) };
1164 struct afinfo_addr
*ap
;
1165 findlabel_state fls
;
1167 int cbyte
, i
, j
, foundj
= -1, lablen
, labstart
, id
, f
, ac
;
1173 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
1174 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1176 if (cbyte
!= max
) return adns_s_invaliddata
;
1178 ap
= &pai
->qu
->ctx
.info
.ptr_parent_addr
;
1180 adns__findlabel_start(&fls
, pai
->ads
, -1, pai
->qu
,
1181 pai
->qu
->query_dgram
, pai
->qu
->query_dglen
,
1182 pai
->qu
->query_dglen
, DNS_HDRSIZE
, 0);
1184 f
= (1 << n_ed
) - 1; /* superposition of address types */
1186 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
); assert(!st
);
1187 if (lablen
<= 0) break;
1188 for (j
= 0; j
< n_ed
; j
++) {
1189 if (!(f
& (1 << j
))) continue;
1190 if (i
< expectdomain
[j
].ai
->nrevcomp
) {
1191 ac
= expectdomain
[j
].ai
->rev_parsecomp(
1192 pai
->qu
->query_dgram
+ labstart
, lablen
);
1193 if (ac
< 0) goto mismatch
;
1194 assert(i
< sizeof(ipv
[j
]));
1197 tp
= expectdomain
[j
].tail
[i
- expectdomain
[j
].ai
->nrevcomp
];
1199 strncmp(pai
->qu
->query_dgram
+ labstart
, tp
, lablen
) != 0 ||
1207 if (!f
) return adns_s_querydomainwrong
;
1211 if (lablen
< 0) return adns_s_querydomainwrong
;
1212 for (j
= 0; j
< n_ed
; j
++) {
1213 if (!(f
& (1 << j
))) continue;
1214 if (i
>= expectdomain
[j
].ai
->nrevcomp
&&
1215 !expectdomain
[j
].tail
[i
- expectdomain
[j
].ai
->nrevcomp
])
1216 { foundj
= j
; continue; }
1218 if (!f
) return adns_s_querydomainwrong
;
1220 assert(foundj
>= 0 && f
== (1 << foundj
)); /* collapsed to a single type */
1222 ap
->ai
= expectdomain
[foundj
].ai
;
1223 ap
->ai
->rev_mkaddr(&ap
->addr
, ipv
[foundj
]);
1226 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
1227 pai
->dgram
, pai
->dglen
, dmstart
,
1228 ap
->ai
->rrtype
, adns_qf_quoteok_query
);
1232 ctx
.callback
= icb_ptr
;
1233 memset(&ctx
.info
,0,sizeof(ctx
.info
));
1234 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(ap
->ai
->rrtype
),
1235 ap
->ai
->rrtype
, &pai
->qu
->vb
, id
,
1236 adns_qf_quoteok_query
, pai
->now
, &ctx
);
1239 nqu
->parent
= pai
->qu
;
1240 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
1248 static void mf_strpair(adns_query qu
, void *datap
) {
1249 adns_rr_strpair
*rrp
= datap
;
1251 adns__makefinal_str(qu
,&rrp
->array
[0]);
1252 adns__makefinal_str(qu
,&rrp
->array
[1]);
1259 static void mf_intstrpair(adns_query qu
, void *datap
) {
1260 adns_rr_intstrpair
*rrp
= datap
;
1262 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
1263 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
1270 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
1271 int max
, void *datap
) {
1272 adns_rr_intstrpair
*rrp
= datap
;
1276 for (i
=0; i
<2; i
++) {
1277 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
1281 if (cbyte
!= max
) return adns_s_invaliddata
;
1290 static adns_status
pap_mailbox822(const parseinfo
*pai
,
1291 int *cbyte_io
, int max
, char **mb_r
) {
1292 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
1293 const unsigned char *p
;
1295 findlabel_state fls
;
1301 adns__findlabel_start(&fls
, pai
->ads
,
1303 pai
->dgram
, pai
->dglen
, max
,
1304 *cbyte_io
, cbyte_io
);
1305 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
1307 adns__vbuf_appendstr(vb
,".");
1312 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
1314 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
1315 if (c
== '.' && !neednorm
) neednorm
= 1;
1316 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
1320 if (needquote
|| neednorm
) {
1321 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
1322 adns__vbuf_appendq(vb
,"\"",1);
1323 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
1325 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
1326 adns__vbuf_appendq(vb
,p
,1);
1328 adns__vbuf_appendq(vb
,"\"",1);
1330 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
1333 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
1335 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
1339 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
1340 memcpy(str
,vb
->buf
,vb
->used
);
1346 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
1348 if (pai
->qu
->typei
->typekey
& adns__qtf_mail822
) {
1349 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
1351 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
1355 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
1356 return csp_domain(vb
,mailbox
);
1363 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
1364 int max
, void *datap
) {
1365 adns_rr_strpair
*rrp
= datap
;
1368 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
1371 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
1374 if (cbyte
!= max
) return adns_s_invaliddata
;
1378 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
1379 const adns_rr_strpair
*rrp
= datap
;
1382 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
1384 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
1393 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
1394 int max
, void *datap
) {
1395 adns_rr_soa
*rrp
= datap
;
1396 const byte
*dgram
= pai
->dgram
;
1400 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
1401 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1404 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
1407 if (cbyte
+20 != max
) return adns_s_invaliddata
;
1409 for (i
=0; i
<5; i
++) {
1412 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
1418 static void mf_soa(adns_query qu
, void *datap
) {
1419 adns_rr_soa
*rrp
= datap
;
1421 adns__makefinal_str(qu
,&rrp
->mname
);
1422 adns__makefinal_str(qu
,&rrp
->rname
);
1425 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
1426 const adns_rr_soa
*rrp
= datap
;
1431 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
1433 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
1435 for (i
=0; i
<5; i
++) {
1436 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1444 * _srv* (pa*2,di,cs*2,qdpl,postsort)
1447 static adns_status
qdpl_srv(adns_state ads
,
1448 const char **p_io
, const char *pe
, int labelnum
,
1449 char label_r
[DNS_MAXDOMAIN
], int *ll_io
,
1450 adns_queryflags flags
,
1451 const typeinfo
*typei
) {
1456 if (labelnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1457 useflags
= adns_qf_quoteok_query
;
1463 st
= adns__qdpl_normal(ads
, p_io
,pe
, labelnum
,label_r
, ll_io
, useflags
,typei
);
1468 if (!ll
|| label_r
[0]!='_')
1469 return adns_s_querydomaininvalid
;
1470 if (memchr(p_orig
+1, '\\', pe
- (p_orig
+1)))
1471 return adns_s_querydomaininvalid
;
1476 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1478 /* might be adns_rr_srvraw* */) {
1479 const byte
*dgram
= pai
->dgram
;
1483 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1485 rrp
->priority
= GET_W(cbyte
, ti
);
1486 rrp
->weight
= GET_W(cbyte
, ti
);
1487 rrp
->port
= GET_W(cbyte
, ti
);
1491 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1492 int max
, void *datap
) {
1493 adns_rr_srvraw
*rrp
= datap
;
1496 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1499 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1500 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1503 if (cbyte
!= max
) return adns_s_invaliddata
;
1507 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1508 int max
, void *datap
) {
1509 adns_rr_srvha
*rrp
= datap
;
1512 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1513 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1514 if (cbyte
!= max
) return adns_s_invaliddata
;
1518 static void mf_srvraw(adns_query qu
, void *datap
) {
1519 adns_rr_srvraw
*rrp
= datap
;
1520 adns__makefinal_str(qu
, &rrp
->host
);
1523 static void mf_srvha(adns_query qu
, void *datap
) {
1524 adns_rr_srvha
*rrp
= datap
;
1525 mfp_hostaddr(qu
,&rrp
->ha
);
1528 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1529 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1530 /* might be const adns_rr_svhostaddr* */
1532 if (ap
->priority
< bp
->priority
) return 0;
1533 if (ap
->priority
> bp
->priority
) return 1;
1537 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1538 /* might be adns_rr_srvraw* */) {
1540 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1545 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1546 const adns_rr_srvraw
*rrp
= datap
;
1549 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1550 return csp_domain(vb
,rrp
->host
);
1553 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1554 const adns_rr_srvha
*rrp
= datap
;
1557 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1558 return csp_hostaddr(vb
,&rrp
->ha
);
1561 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,
1562 const struct typeinfo
*typei
) {
1563 /* we treat everything in the array as if it were an adns_rr_srvha
1564 * even though the array might be of adns_rr_srvraw. That's OK
1565 * because they have the same prefix, which is all we access.
1566 * We use typei->rrsz, too, rather than naive array indexing, of course.
1568 char *workbegin
, *workend
, *search
, *arrayend
;
1569 const adns_rr_srvha
*rr
;
1570 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1571 int cpriority
, totalweight
, runtotal
;
1574 for (workbegin
= array
, arrayend
= workbegin
+ typei
->rrsz
* nrrs
;
1575 workbegin
< arrayend
;
1576 workbegin
= workend
) {
1577 cpriority
= (rr
=(void*)workbegin
)->priority
;
1579 for (workend
= workbegin
, totalweight
= 0;
1580 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1581 workend
+= typei
->rrsz
) {
1582 totalweight
+= rr
->weight
;
1585 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1586 * cpriority. From now on, workbegin points to the `remaining'
1587 * records: we select one record at a time (RFC2782 `Usage rules'
1588 * and `Format of the SRV RR' subsection `Weight') to place at
1589 * workbegin (swapping with the one that was there, and then
1590 * advance workbegin. */
1592 workbegin
+ typei
->rrsz
< workend
; /* don't bother if just one */
1593 workbegin
+= typei
->rrsz
) {
1595 randval
= nrand48(ads
->rand48xsubi
);
1596 randval
%= (totalweight
+ 1);
1597 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1598 * totalweight must be <= 2^26 so probability nonuniformity is
1599 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1600 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1603 for (search
=workbegin
, runtotal
=0;
1604 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1605 search
+= typei
->rrsz
);
1606 assert(search
< arrayend
);
1607 totalweight
-= rr
->weight
;
1608 if (search
!= workbegin
) {
1609 memcpy(&rrtmp
, workbegin
, typei
->rrsz
);
1610 memcpy(workbegin
, search
, typei
->rrsz
);
1611 memcpy(search
, &rrtmp
, typei
->rrsz
);
1616 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1617 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1618 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1626 static void mf_byteblock(adns_query qu
, void *datap
) {
1627 adns_rr_byteblock
*rrp
= datap
;
1628 void *bytes
= rrp
->data
;
1629 adns__makefinal_block(qu
,&bytes
,rrp
->len
);
1637 static adns_status
pa_opaque(const parseinfo
*pai
, int cbyte
,
1638 int max
, void *datap
) {
1639 adns_rr_byteblock
*rrp
= datap
;
1641 rrp
->len
= max
- cbyte
;
1642 rrp
->data
= adns__alloc_interim(pai
->qu
, rrp
->len
);
1643 if (!rrp
->data
) R_NOMEM
;
1644 memcpy(rrp
->data
, pai
->dgram
+ cbyte
, rrp
->len
);
1648 static adns_status
cs_opaque(vbuf
*vb
, const void *datap
) {
1649 const adns_rr_byteblock
*rrp
= datap
;
1654 sprintf(buf
,"\\# %d",rrp
->len
);
1657 for (l
= rrp
->len
, p
= rrp
->data
;
1660 sprintf(buf
," %02x%02x%02x%02x",p
[0],p
[1],p
[2],p
[3]);
1666 sprintf(buf
," %02x",*p
);
1676 static void mf_flat(adns_query qu
, void *data
) { }
1682 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1684 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
1685 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
1687 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1688 { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), \
1689 mf_##memb, printer,parser,comparer, adns__qdpl_normal,0,0,0 }
1690 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1691 { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), \
1692 mf_flat, printer,parser,comparer, adns__qdpl_normal,0,0,0 }
1693 #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer, \
1694 makefinal,qdpl,postsort,getrrsz,sender) \
1695 { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), makefinal, \
1696 printer,parser,comparer,qdpl,postsort,getrrsz,sender }
1698 static const typeinfo typeinfos
[] = {
1699 /* Must be in ascending order of rrtype ! */
1700 /* mem-mgmt code rrt fmt member parser comparer printer */
1702 FLAT_TYPE(a
, "A", 0, inaddr
, pa_inaddr
, di_inaddr
,cs_inaddr
),
1703 DEEP_TYPE(ns_raw
, "NS", "raw",str
, pa_host_raw
,0, cs_domain
),
1704 DEEP_TYPE(cname
, "CNAME", 0, str
, pa_dom_raw
, 0, cs_domain
),
1705 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, pa_soa
, 0, cs_soa
),
1706 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, pa_host_raw
,0, cs_domain
),
1707 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,pa_hinfo
, 0, cs_hinfo
),
1708 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, pa_mx_raw
, di_mx_raw
,cs_inthost
),
1709 DEEP_TYPE(txt
, "TXT", 0, manyistr
,pa_txt
, 0, cs_txt
),
1710 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, pa_rp
, 0, cs_rp
),
1711 FLAT_TYPE(aaaa
, "AAAA", 0, in6addr
, pa_in6addr
, di_in6addr
,cs_in6addr
),
1712 XTRA_TYPE(srv_raw
,"SRV", "raw",srvraw
, pa_srvraw
, di_srv
, cs_srvraw
,
1713 mf_srvraw
, qdpl_srv
, postsort_srv
, 0, 0),
1715 XTRA_TYPE(addr
, "A", "addr", addr
, pa_addr
, di_addr
, cs_addr
,
1716 mf_flat
, adns__qdpl_normal
, 0, gsz_addr
, qs_addr
),
1717 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
,pa_hostaddr
,di_hostaddr
,cs_hostaddr
),
1718 DEEP_TYPE(ptr
, "PTR","checked",str
, pa_ptr
, 0, cs_domain
),
1719 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,pa_mx
, di_mx
, cs_inthostaddr
),
1720 XTRA_TYPE(srv
, "SRV","+addr",srvha
, pa_srvha
, di_srv
, cs_srvha
,
1721 mf_srvha
, qdpl_srv
, postsort_srv
, 0, 0),
1723 DEEP_TYPE(soa
, "SOA","822", soa
, pa_soa
, 0, cs_soa
),
1724 DEEP_TYPE(rp
, "RP", "822", strpair
, pa_rp
, 0, cs_rp
),
1727 static const typeinfo typeinfo_unknown
=
1728 DEEP_TYPE(unknown
,0, "unknown",byteblock
,pa_opaque
, 0, cs_opaque
);
1730 const typeinfo
*adns__findtype(adns_rrtype type
) {
1731 const typeinfo
*begin
, *end
, *mid
;
1733 if (type
& adns_r_unknown
) return &typeinfo_unknown
;
1734 type
&= adns_rrt_reprmask
;
1736 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1738 while (begin
< end
) {
1739 mid
= begin
+ ((end
-begin
)>>1);
1740 if (mid
->typekey
== type
) return mid
;
1741 if (type
> mid
->typekey
) begin
= mid
+1;