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>
37 #define R_NOMEM return adns_s_nomemory
38 #define CSP_ADDSTR(s) do { \
39 if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \
46 * _textdata, _qstring (csp)
52 * +search_sortlist, dip_genaddr, csp_genaddr)
54 * _addr (pap,pa,di,div,csp,cs,gsz,qs
55 * +search_sortlist_sa, dip_sockaddr,
56 * addr_rrtypes, addr_submit, icb_addr)
57 * _domain (pap,csp,cs)
60 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs
61 * +pap_findaddrs, icb_hostaddr)
64 * _inthostaddr (mf,cs)
66 * _ptr (ckl,pa +icb_ptr)
70 * _mailbox (pap,csp +pap_mailbox822)
73 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
78 * within each section:
97 static adns_status
pap_qstring(const parseinfo
*pai
, int *cbyte_io
, int max
,
98 int *len_r
, char **str_r
) {
99 /* Neither len_r nor str_r may be null.
100 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
102 const byte
*dgram
= pai
->dgram
;
108 if (cbyte
>= max
) return adns_s_invaliddata
;
110 if (cbyte
+l
> max
) return adns_s_invaliddata
;
112 str
= adns__alloc_interim(pai
->qu
, l
+1);
116 memcpy(str
,dgram
+cbyte
,l
);
125 static adns_status
csp_qstring(vbuf
*vb
, const char *dp
, int len
) {
131 for (cn
=0; cn
<len
; cn
++) {
135 } else if (ch
== '"') {
137 } else if (ch
>= 32 && ch
<= 126) {
138 if (!adns__vbuf_append(vb
,&ch
,1)) R_NOMEM
;
140 sprintf(buf
,"\\x%02x",ch
);
153 static void mf_str(adns_query qu
, void *datap
) {
156 adns__makefinal_str(qu
,rrp
);
163 static void mf_intstr(adns_query qu
, void *datap
) {
164 adns_rr_intstr
*rrp
= datap
;
166 adns__makefinal_str(qu
,&rrp
->str
);
173 static void mf_manyistr(adns_query qu
, void *datap
) {
174 adns_rr_intstr
**rrp
= datap
;
175 adns_rr_intstr
*te
, *table
;
179 for (tc
=0, te
= *rrp
; te
->i
>= 0; te
++, tc
++);
181 adns__makefinal_block(qu
,&tablev
,sizeof(*te
)*(tc
+1));
183 for (te
= *rrp
; te
->i
>= 0; te
++)
184 adns__makefinal_str(qu
,&te
->str
);
191 static adns_status
pa_txt(const parseinfo
*pai
, int cbyte
,
192 int max
, void *datap
) {
193 adns_rr_intstr
**rrp
= datap
, *table
, *te
;
194 const byte
*dgram
= pai
->dgram
;
195 int ti
, tc
, l
, startbyte
;
199 if (cbyte
>= max
) return adns_s_invaliddata
;
201 while (cbyte
< max
) {
206 if (cbyte
!= max
|| !tc
) return adns_s_invaliddata
;
208 table
= adns__alloc_interim(pai
->qu
,sizeof(*table
)*(tc
+1));
211 for (cbyte
=startbyte
, ti
=0, te
=table
; ti
<tc
; ti
++, te
++) {
212 st
= pap_qstring(pai
, &cbyte
, max
, &te
->i
, &te
->str
);
215 assert(cbyte
== max
);
224 static adns_status
cs_txt(vbuf
*vb
, const void *datap
) {
225 const adns_rr_intstr
*const *rrp
= datap
;
226 const adns_rr_intstr
*current
;
230 for (current
= *rrp
, spc
=0; current
->i
>= 0; current
++, spc
=1) {
231 if (spc
) CSP_ADDSTR(" ");
232 st
= csp_qstring(vb
,current
->str
,current
->i
); if (st
) return st
;
241 static adns_status
cs_hinfo(vbuf
*vb
, const void *datap
) {
242 const adns_rr_intstrpair
*rrp
= datap
;
245 st
= csp_qstring(vb
,rrp
->array
[0].str
,rrp
->array
[0].i
); if (st
) return st
;
247 st
= csp_qstring(vb
,rrp
->array
[1].str
,rrp
->array
[1].i
); if (st
) return st
;
252 * _inaddr (pa,di,cs +search_sortlist, dip_genaddr, csp_genaddr)
255 static adns_status
pa_inaddr(const parseinfo
*pai
, int cbyte
,
256 int max
, void *datap
) {
257 struct in_addr
*storeto
= datap
;
259 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
260 memcpy(storeto
, pai
->dgram
+ cbyte
, 4);
264 static int search_sortlist(adns_state ads
, int af
, const void *ad
) {
265 const struct sortlist
*slp
;
270 if (af
== AF_INET6
) {
271 const struct in6_addr
*a6
= ad
;
272 if (IN6_IS_ADDR_V4MAPPED(a6
)) {
273 a4
.s_addr
= htonl(((unsigned long)a6
->s6_addr
[12] << 24) |
274 ((unsigned long)a6
->s6_addr
[13] << 16) |
275 ((unsigned long)a6
->s6_addr
[14] << 8) |
276 ((unsigned long)a6
->s6_addr
[15] << 0));
281 for (i
=0, slp
=ads
->sortlist
;
283 !adns__addr_matches(af
,ad
, &slp
->base
,&slp
->mask
) &&
285 adns__addr_matches(AF_INET
,&a4
, &slp
->base
,&slp
->mask
));
290 static int dip_genaddr(adns_state ads
, int af
, const void *a
, const void *b
) {
293 if (!ads
->nsortlist
) return 0;
295 ai
= search_sortlist(ads
,af
,a
);
296 bi
= search_sortlist(ads
,af
,b
);
300 static int di_inaddr(adns_state ads
,
301 const void *datap_a
, const void *datap_b
) {
302 return dip_genaddr(ads
,AF_INET
,datap_a
,datap_b
);
305 static adns_status
csp_genaddr(vbuf
*vb
, int af
, const void *p
) {
306 char buf
[ADNS_ADDR2TEXT_BUFLEN
];
307 int len
= sizeof(buf
);
311 memset(&a
, 0, sizeof(a
));
312 a
.addr
.sa
.sa_family
= af
;
313 adns__addr_inject(p
, &a
.addr
);
314 err
= adns_addr2text(&a
.addr
.sa
,0, buf
,&len
, 0); assert(!err
);
319 static adns_status
cs_inaddr(vbuf
*vb
, const void *datap
) {
320 return csp_genaddr(vb
, AF_INET
,datap
);
324 * _in6addr (pa,di,cs)
327 static adns_status
pa_in6addr(const parseinfo
*pai
, int cbyte
,
328 int max
, void *datap
) {
329 struct in6_addr
*storeto
= datap
;
331 if (max
-cbyte
!= 16) return adns_s_invaliddata
;
332 memcpy(storeto
->s6_addr
, pai
->dgram
+ cbyte
, 16);
336 static int di_in6addr(adns_state ads
,
337 const void *datap_a
, const void *datap_b
) {
338 return dip_genaddr(ads
,AF_INET6
,datap_a
,datap_b
);
341 static adns_status
cs_in6addr(vbuf
*vb
, const void *datap
) {
342 return csp_genaddr(vb
,AF_INET6
,datap
);
346 * _addr (pap,pa,di,div,csp,cs,gsz,qs
347 * +search_sortlist_sa, dip_sockaddr, addr_rrtypes,
348 * addr_submit, icb_addr)
351 static const typeinfo tinfo_addrsub
;
353 #define ADDR_RRTYPES(_) _(a) _(aaaa)
355 static const adns_rrtype addr_all_rrtypes
[] = {
356 #define RRTY_CODE(ty) adns_r_##ty,
357 ADDR_RRTYPES(RRTY_CODE
)
362 #define RRTY_INDEX(ty) addr__ri_##ty,
363 ADDR_RRTYPES(RRTY_INDEX
)
366 #define RRTY_FLAG(ty) addr_rf_##ty = 1 << addr__ri_##ty,
367 ADDR_RRTYPES(RRTY_FLAG
)
372 static unsigned addr_rrtypeflag(adns_rrtype type
) {
375 type
&= adns_rrt_typemask
;
376 for (i
=0; i
<addr_nrrtypes
&& type
!=addr_all_rrtypes
[i
]; i
++);
377 return i
< addr_nrrtypes ?
1 << i
: 0;
380 /* About CNAME handling in addr queries.
382 * A user-level addr query is translated into a number of protocol-level
383 * queries, and its job is to reassemble the results. This gets tricky if
384 * the answers aren't consistent. In particular, if the answers report
385 * inconsistent indirection via CNAME records (e.g., different CNAMEs, or
386 * some indirect via a CNAME, and some don't) then we have trouble.
388 * Once we've received an answer, even if it was NODATA, we set
389 * adns__qf_addr_answer on the parent query. This will let us detect a
390 * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME.
392 * If we detect a conflict of any kind, then at least one answer came back
393 * with a CNAME record, so we pick the first such answer (somewhat
394 * arbitrarily) as being the `right' canonical name, and set this in the
395 * parent query's answer->cname slot. We discard address records from the
396 * wrong name. And finally we cancel the outstanding child queries, and
397 * resubmit address queries for the address families we don't yet have, with
398 * adns__qf_addr_cname set so that we know that we're in the fixup state.
401 static adns_status
pap_addr(const parseinfo
*pai
, int rrty
, size_t rrsz
,
402 int *cbyte_io
, int max
, adns_rr_addr
*storeto
) {
403 const byte
*dgram
= pai
->dgram
;
404 int af
, addrlen
, salen
;
405 struct in6_addr v6map
;
406 const void *oaddr
= dgram
+ *cbyte_io
;
407 int avail
= max
- *cbyte_io
;
413 if ((pai
->qu
->flags
& adns_qf_ipv6_mapv4
) &&
414 (pai
->qu
->answer
->type
& adns__qtf_bigaddr
)) {
415 if (avail
< 4) return adns_s_invaliddata
;
416 memset(v6map
.s6_addr
+ 0, 0x00, 10);
417 memset(v6map
.s6_addr
+ 10, 0xff, 2);
418 memcpy(v6map
.s6_addr
+ 12, oaddr
, 4);
419 oaddr
= v6map
.s6_addr
; avail
= sizeof(v6map
.s6_addr
);
420 if (step
< 0) step
= 4;
423 af
= AF_INET
; addrlen
= 4;
424 addrp
= &storeto
->addr
.inet
.sin_addr
;
425 salen
= sizeof(storeto
->addr
.inet
);
429 af
= AF_INET6
; addrlen
= 16;
430 addrp
= storeto
->addr
.inet6
.sin6_addr
.s6_addr
;
431 salen
= sizeof(storeto
->addr
.inet6
);
436 assert(offsetof(adns_rr_addr
, addr
) + salen
<= rrsz
);
437 if (addrlen
< avail
) return adns_s_invaliddata
;
438 if (step
< 0) step
= addrlen
;
440 memset(&storeto
->addr
, 0, salen
);
442 storeto
->addr
.sa
.sa_family
= af
;
443 memcpy(addrp
, oaddr
, addrlen
);
448 static adns_status
pa_addr(const parseinfo
*pai
, int cbyte
,
449 int max
, void *datap
) {
450 int err
= pap_addr(pai
, pai
->qu
->answer
->type
& adns_rrt_typemask
,
451 pai
->qu
->answer
->rrsz
, &cbyte
, max
, datap
);
453 if (cbyte
!= max
) return adns_s_invaliddata
;
457 static int search_sortlist_sa(adns_state ads
, const struct sockaddr
*sa
) {
458 const void *pa
= adns__sockaddr_addr(sa
);
459 return search_sortlist(ads
, sa
->sa_family
, pa
);
462 static int dip_sockaddr(adns_state ads
,
463 const struct sockaddr
*sa
,
464 const struct sockaddr
*sb
) {
465 if (!ads
->sortlist
) return 0;
466 return search_sortlist_sa(ads
, sa
) > search_sortlist_sa(ads
, sb
);
469 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
470 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
471 return dip_sockaddr(ads
, &ap
->addr
.sa
, &bp
->addr
.sa
);
474 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
475 const adns_state ads
= context
;
477 return di_addr(ads
, datap_a
, datap_b
);
480 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
481 char buf
[ADNS_ADDR2TEXT_BUFLEN
];
482 int len
= sizeof(buf
);
485 switch (rrp
->addr
.inet
.sin_family
) {
490 CSP_ADDSTR("INET6 ");
493 err
= adns_addr2text(&rrp
->addr
.sa
,0, buf
,&len
, 0); assert(!err
);
497 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
504 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
505 const adns_rr_addr
*rrp
= datap
;
507 return csp_addr(vb
,rrp
);
510 static int gsz_addr(const typeinfo
*typei
, adns_rrtype type
) {
511 return type
& adns__qtf_bigaddr ?
512 sizeof(adns_rr_addr
) : sizeof(adns_rr_addr_v4only
);
515 static unsigned addr_rrtypes(adns_state ads
, adns_rrtype type
,
516 adns_queryflags qf
) {
517 /* Return a mask of addr_rf_... flags indicating which address families are
518 * wanted, given a query type and flags.
521 adns_queryflags permitaf
= 0;
524 if (!(type
& adns__qtf_bigaddr
))
525 qf
= (qf
& ~adns_qf_want_allaf
) | adns_qf_want_ipv4
;
527 if (!(qf
& adns_qf_want_allaf
)) {
528 qf
|= (type
& adns__qtf_manyaf
) ?
529 adns_qf_want_allaf
: adns_qf_want_ipv4
;
531 if (ads
->iflags
& adns_if_permit_ipv4
) permitaf
|= adns_qf_want_ipv4
;
532 if (ads
->iflags
& adns_if_permit_ipv6
) permitaf
|= adns_qf_want_ipv6
;
533 if (qf
& permitaf
) qf
&= permitaf
| ~adns_qf_want_allaf
;
536 if (qf
& adns_qf_want_ipv4
) want
|= addr_rf_a
;
537 if (qf
& adns_qf_want_ipv6
) want
|= addr_rf_aaaa
;
542 static void icb_addr(adns_query parent
, adns_query child
);
544 static void addr_subqueries(adns_query qu
, struct timeval now
,
545 adns_queryflags qf_extra
,
546 const byte
*qd_dgram
, int qd_dglen
) {
549 adns_queryflags qf
= (qu
->flags
& ~adns_qf_search
) | qf_extra
;
550 adns_rrtype qtf
= qu
->answer
->type
& adns__qtf_deref
;
551 unsigned which
= qu
->ctx
.tinfo
.addr
.want
& ~qu
->ctx
.tinfo
.addr
.have
;
554 memset(&ctx
, 0, sizeof(ctx
));
555 ctx
.callback
= icb_addr
;
556 for (i
=0; i
<addr_nrrtypes
; i
++) {
557 if (!(which
& (1 << i
))) continue;
558 err
= adns__mkquery_frdgram(qu
->ads
, &qu
->vb
, &id
, qd_dgram
,qd_dglen
,
559 DNS_HDRSIZE
, addr_all_rrtypes
[i
], qf
);
560 if (err
) goto x_error
;
561 err
= adns__internal_submit(qu
->ads
, &cqu
, &tinfo_addrsub
,
562 addr_all_rrtypes
[i
] | qtf
,
563 &qu
->vb
, id
, qf
, now
, &ctx
);
564 if (err
) goto x_error
;
565 cqu
->answer
->rrsz
= qu
->answer
->rrsz
;
567 LIST_LINK_TAIL_PART(qu
->children
, cqu
,siblings
.);
569 qu
->state
= query_childw
;
570 LIST_LINK_TAIL(qu
->ads
->childw
, qu
);
574 adns__query_fail(qu
, err
);
577 static adns_status
addr_submit(adns_query parent
, adns_query
*query_r
,
578 vbuf
*qumsg_vb
, int id
, unsigned want
,
579 adns_queryflags flags
, struct timeval now
,
581 /* This is effectively a substitute for adns__internal_submit, intended for
582 * the case where the caller (possibly) only wants a subset of the
583 * available record types. The memory management and callback rules are
584 * the same as for adns__internal_submit.
586 * Some differences: the query is linked onto the parent's children list
587 * before exit (though the parent's state is not changed, and it is not
588 * linked into the childw list queue); and we fiddle with the `tinfo'
589 * portion of the context structure (yes, modifying *ctx), since this is,
590 * in fact, the main purpose of this function.
593 adns_state ads
= parent
->ads
;
596 adns_rrtype type
= ((adns_r_addr
& adns_rrt_reprmask
) |
597 (parent
->answer
->type
& ~adns_rrt_reprmask
));
599 ctx
->tinfo
.addr
.want
= want
;
600 ctx
->tinfo
.addr
.have
= 0;
601 err
= adns__internal_submit(ads
, &qu
, adns__findtype(adns_r_addr
),
602 type
, qumsg_vb
, id
, flags
, now
, ctx
);
606 LIST_LINK_TAIL_PART(parent
->children
, qu
, siblings
.);
611 static adns_status
append_addrs(adns_query qu
, size_t rrsz
,
612 adns_rr_addr
**dp
, int *dlen
,
613 const adns_rr_addr
*sp
, int slen
) {
614 /* Append a vector of slen addr records, each of size rrsz, starting at ap,
615 * to a vector starting at *dp, of length *dlen. On successful completion,
616 * *dp and *dlen are updated.
619 size_t drrsz
= *dlen
*rrsz
, srrsz
= slen
*rrsz
;
622 if (!slen
) return adns_s_ok
;
623 p
= adns__alloc_interim(qu
, drrsz
+ srrsz
);
626 memcpy(p
, *dp
, drrsz
);
627 adns__free_interim(qu
, *dp
);
629 memcpy(p
+ drrsz
, sp
, srrsz
);
631 *dp
= (adns_rr_addr
*)p
;
635 static void propagate_ttl(adns_query to
, adns_query from
)
636 { if (to
->expires
> from
->expires
) to
->expires
= from
->expires
; }
638 static adns_status
copy_cname_from_child(adns_query parent
, adns_query child
) {
639 adns_answer
*pans
= parent
->answer
, *cans
= child
->answer
;
640 size_t n
= strlen(cans
->cname
) + 1;
642 pans
->cname
= adns__alloc_preserved(parent
, n
);
643 if (!pans
->cname
) R_NOMEM
;
644 memcpy(pans
->cname
, cans
->cname
, n
);
648 static void done_addr_type(adns_query qu
, adns_rrtype type
) {
649 unsigned f
= addr_rrtypeflag(type
);
650 assert(f
); qu
->ctx
.tinfo
.addr
.have
|= f
;
653 static void icb_addr(adns_query parent
, adns_query child
) {
654 adns_state ads
= parent
->ads
;
655 adns_answer
*pans
= parent
->answer
, *cans
= child
->answer
;
661 propagate_ttl(parent
, child
);
663 if (!(child
->flags
& adns__qf_addr_cname
) &&
664 (parent
->flags
& adns__qf_addr_answer
) &&
665 (!!pans
->cname
!= !!cans
->cname
||
666 (pans
->cname
&& strcmp(pans
->cname
, cans
->cname
)))) {
667 /* We've detected an inconsistency in CNAME records, and must deploy
672 /* The child has a CNAME record, but the parent doesn't. We must
673 * discard all of the parent's addresses, and substitute the child's.
676 assert(pans
->rrsz
== cans
->rrsz
);
677 adns__free_interim(parent
, pans
->rrs
.bytes
);
678 adns__transfer_interim(child
, parent
, cans
->rrs
.bytes
);
679 pans
->rrs
.bytes
= cans
->rrs
.bytes
;
680 pans
->nrrs
= cans
->nrrs
;
681 parent
->ctx
.tinfo
.addr
.have
= 0;
682 done_addr_type(parent
, cans
->type
);
683 err
= copy_cname_from_child(parent
, child
); if (err
) goto x_err
;
686 /* We've settled on the CNAME (now) associated with the parent, which
687 * already has appropriate address records. Build a query datagram for
688 * this name so that we can issue child queries for the missing address
689 * families. The child's vbuf looks handy for this.
691 err
= adns__mkquery(ads
, &child
->vb
, &id
, pans
->cname
,
692 strlen(pans
->cname
), &tinfo_addrsub
,
693 adns_r_addr
, parent
->flags
);
696 /* Now cancel the remaining children, and try again with the CNAME we've
699 adns__cancel_children(parent
);
700 if (gettimeofday(&now
, 0)) goto x_gtod
;
701 qf
= adns__qf_addr_cname
;
702 if (!(parent
->flags
& adns_qf_cname_loose
)) qf
|= adns_qf_cname_forbid
;
703 addr_subqueries(parent
, now
, qf
, child
->vb
.buf
, child
->vb
.used
);
707 if (cans
->cname
&& !pans
->cname
) {
708 err
= copy_cname_from_child(parent
, child
);
712 if ((parent
->flags
& adns_qf_search
) &&
713 !pans
->cname
&& cans
->status
== adns_s_nxdomain
) {
714 /* We're searching a list of suffixes, and the name doesn't exist. Try
718 adns__cancel_children(parent
);
719 adns__free_interim(parent
, pans
->rrs
.bytes
);
720 pans
->rrs
.bytes
= 0; pans
->nrrs
= 0;
721 if (gettimeofday(&now
, 0)) goto x_gtod
;
722 adns__search_next(ads
, parent
, now
);
726 if (cans
->status
&& cans
->status
!= adns_s_nodata
)
727 { err
= cans
->status
; goto x_err
; }
729 assert(pans
->rrsz
== cans
->rrsz
);
730 err
= append_addrs(parent
, pans
->rrsz
,
731 &pans
->rrs
.addr
, &pans
->nrrs
,
732 cans
->rrs
.addr
, cans
->nrrs
);
734 done_addr_type(parent
, cans
->type
);
736 if (parent
->children
.head
) LIST_LINK_TAIL(ads
->childw
, parent
);
737 else if (!pans
->nrrs
) adns__query_fail(parent
, adns_s_nodata
);
738 else adns__query_done(parent
);
739 parent
->flags
|= adns__qf_addr_answer
;
743 adns__diag(ads
, -1, parent
, "gettimeofday failed: %s", strerror(errno
));
744 err
= adns_s_systemfail
;
748 adns__query_fail(parent
, err
);
751 static void qs_addr(adns_query qu
, struct timeval now
) {
752 if (!qu
->ctx
.tinfo
.addr
.want
) {
753 qu
->ctx
.tinfo
.addr
.want
= addr_rrtypes(qu
->ads
, qu
->answer
->type
,
755 qu
->ctx
.tinfo
.addr
.have
= 0;
757 addr_subqueries(qu
, now
, 0, qu
->query_dgram
, qu
->query_dglen
);
761 * _domain (pap,csp,cs)
765 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
766 char **domain_r
, parsedomain_flags flags
) {
770 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
771 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
773 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
775 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
778 dm
[pai
->qu
->vb
.used
]= 0;
779 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
785 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
787 if (!*domain
) CSP_ADDSTR(".");
791 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
792 const char *const *domainp
= datap
;
793 return csp_domain(vb
,*domainp
);
796 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
797 int max
, void *datap
) {
801 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
804 if (cbyte
!= max
) return adns_s_invaliddata
;
812 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
813 int max
, void *datap
) {
817 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
818 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
821 if (cbyte
!= max
) return adns_s_invaliddata
;
826 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
829 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
830 unsigned *want_io
, size_t addrsz
,
831 int *cbyte_io
, int count
, int dmstart
) {
833 unsigned typef
, want
= *want_io
, need
= want
;
834 int type
, class, rdlen
, rdend
, rdstart
, ownermatched
;
838 for (rri
=0, naddrs
=0; rri
<count
; rri
++) {
839 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
840 pai
->dglen
, cbyte_io
,
841 &type
, &class, &ttl
, &rdlen
, &rdstart
,
842 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
844 if (!ownermatched
|| class != DNS_CLASS_IN
) continue;
845 typef
= addr_rrtypeflag(type
);
846 if (!(want
& typef
)) continue;
848 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*addrsz
)) R_NOMEM
;
849 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
850 rdend
= rdstart
+ rdlen
;
851 st
= pap_addr(pai
, type
, addrsz
, &rdstart
, rdend
,
852 (adns_rr_addr
*)(pai
->qu
->vb
.buf
+ naddrs
*addrsz
));
854 if (rdstart
!= rdend
) return adns_s_invaliddata
;
858 st
= append_addrs(pai
->qu
, addrsz
, &ha
->addrs
, &ha
->naddrs
,
859 (const adns_rr_addr
*)pai
->qu
->vb
.buf
, naddrs
);
861 ha
->astatus
= adns_s_ok
;
864 adns__isort(ha
->addrs
, naddrs
, addrsz
, pai
->qu
->vb
.buf
,
872 static void icb_hostaddr(adns_query parent
, adns_query child
) {
873 adns_answer
*cans
= child
->answer
;
874 adns_rr_hostaddr
*rrp
= child
->ctx
.pinfo
.hostaddr
;
875 adns_state ads
= parent
->ads
;
877 size_t addrsz
= gsz_addr(0, parent
->answer
->type
);
879 st
= cans
->status
== adns_s_nodata ? adns_s_ok
: cans
->status
;
881 propagate_ttl(parent
, child
);
883 assert(addrsz
== cans
->rrsz
);
884 st
= append_addrs(parent
, addrsz
,
885 &rrp
->addrs
, &rrp
->naddrs
,
886 cans
->rrs
.addr
, cans
->nrrs
);
888 if (!rrp
->naddrs
) { st
= adns_s_nodata
; goto done
; }
890 if (!adns__vbuf_ensure(&parent
->vb
, addrsz
))
891 { st
= adns_s_nomemory
; goto done
; }
892 adns__isort(rrp
->addrs
, rrp
->naddrs
, addrsz
, parent
->vb
.buf
,
897 adns__free_interim(parent
, rrp
->addrs
);
898 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : 0;
902 if (parent
->children
.head
) {
903 LIST_LINK_TAIL(ads
->childw
,parent
);
905 adns__query_done(parent
);
909 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
910 int max
, adns_rr_hostaddr
*rrp
) {
916 adns_queryflags nflags
;
918 size_t addrsz
= gsz_addr(0, pai
->qu
->answer
->type
);
920 dmstart
= cbyte
= *cbyte_io
;
921 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
922 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
926 rrp
->astatus
= adns_s_ok
;
932 want
= addr_rrtypes(pai
->ads
, pai
->qu
->answer
->type
, pai
->qu
->flags
);
934 st
= pap_findaddrs(pai
, rrp
, &want
, addrsz
, &cbyte
, pai
->nscount
, dmstart
);
936 if (!want
) return adns_s_ok
;
938 st
= pap_findaddrs(pai
, rrp
, &want
, addrsz
, &cbyte
, pai
->arcount
, dmstart
);
940 if (!want
) return adns_s_ok
;
942 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
943 pai
->dgram
, pai
->dglen
, dmstart
,
944 adns_r_addr
, adns_qf_quoteok_query
);
948 ctx
.callback
= icb_hostaddr
;
949 ctx
.pinfo
.hostaddr
= rrp
;
951 nflags
= adns_qf_quoteok_query
| (pai
->qu
->flags
& (adns_qf_want_allaf
|
952 adns_qf_ipv6_mapv4
));
953 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
955 st
= addr_submit(pai
->qu
, &nqu
, &pai
->qu
->vb
, id
, want
,
956 nflags
, pai
->now
, &ctx
);
962 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
963 int max
, void *datap
) {
964 adns_rr_hostaddr
*rrp
= datap
;
967 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
969 if (cbyte
!= max
) return adns_s_invaliddata
;
974 static int dip_hostaddr(adns_state ads
,
975 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
976 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
977 if (ap
->astatus
) return 0;
979 return dip_sockaddr(ads
, &ap
->addrs
[0].addr
.sa
, &bp
->addrs
[0].addr
.sa
);
982 static int di_hostaddr(adns_state ads
,
983 const void *datap_a
, const void *datap_b
) {
984 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
986 return dip_hostaddr(ads
, ap
,bp
);
989 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
991 size_t addrsz
= gsz_addr(0, qu
->answer
->type
);
993 adns__makefinal_str(qu
,&rrp
->host
);
995 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*addrsz
);
999 static void mf_hostaddr(adns_query qu
, void *datap
) {
1000 adns_rr_hostaddr
*rrp
= datap
;
1002 mfp_hostaddr(qu
,rrp
);
1005 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
1011 st
= csp_domain(vb
,rrp
->host
); if (st
) return st
;
1014 CSP_ADDSTR(adns_errtypeabbrev(rrp
->astatus
));
1016 sprintf(buf
," %d ",rrp
->astatus
);
1019 CSP_ADDSTR(adns_errabbrev(rrp
->astatus
));
1022 errstr
= adns_strerror(rrp
->astatus
);
1023 st
= csp_qstring(vb
,errstr
,strlen(errstr
)); if (st
) return st
;
1025 if (rrp
->naddrs
>= 0) {
1027 for (i
=0; i
<rrp
->naddrs
; i
++) {
1029 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
1038 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
1039 const adns_rr_hostaddr
*rrp
= datap
;
1041 return csp_hostaddr(vb
,rrp
);
1048 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
,
1049 int max
, void *datap
) {
1050 const byte
*dgram
= pai
->dgram
;
1051 adns_rr_intstr
*rrp
= datap
;
1055 if (cbyte
+2 > max
) return adns_s_invaliddata
;
1058 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
1059 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1062 if (cbyte
!= max
) return adns_s_invaliddata
;
1066 static int di_mx_raw(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1067 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
1069 if (ap
->i
< bp
->i
) return 0;
1070 if (ap
->i
> bp
->i
) return 1;
1078 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
,
1079 int max
, void *datap
) {
1080 const byte
*dgram
= pai
->dgram
;
1081 adns_rr_inthostaddr
*rrp
= datap
;
1085 if (cbyte
+2 > max
) return adns_s_invaliddata
;
1088 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
1091 if (cbyte
!= max
) return adns_s_invaliddata
;
1095 static int di_mx(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1096 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
1098 if (ap
->i
< bp
->i
) return 0;
1099 if (ap
->i
> bp
->i
) return 1;
1100 return dip_hostaddr(ads
, &ap
->ha
, &bp
->ha
);
1104 * _inthostaddr (mf,cs)
1107 static void mf_inthostaddr(adns_query qu
, void *datap
) {
1108 adns_rr_inthostaddr
*rrp
= datap
;
1110 mfp_hostaddr(qu
,&rrp
->ha
);
1113 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
1114 const adns_rr_inthostaddr
*rrp
= datap
;
1117 sprintf(buf
,"%u ",rrp
->i
);
1120 return csp_hostaddr(vb
,&rrp
->ha
);
1127 static adns_status
cs_inthost(vbuf
*vb
, const void *datap
) {
1128 const adns_rr_intstr
*rrp
= datap
;
1131 sprintf(buf
,"%u ",rrp
->i
);
1133 return csp_domain(vb
,rrp
->str
);
1137 * _ptr (ckl,pa +icb_ptr)
1140 static adns_status
ckl_ptr(adns_state ads
, adns_queryflags flags
,
1141 union checklabel_state
*cls
, qcontext
*ctx
,
1142 int labnum
, const char *label
, int lablen
) {
1144 if (adns__revparse_label(&cls
->ptr
, labnum
, label
,lablen
))
1145 return adns_s_querydomainwrong
;
1147 if (adns__revparse_done(&cls
->ptr
, labnum
,
1148 &ctx
->tinfo
.ptr
.rev_rrtype
,
1149 &ctx
->tinfo
.ptr
.addr
))
1150 return adns_s_querydomainwrong
;
1155 static void icb_ptr(adns_query parent
, adns_query child
) {
1156 adns_answer
*cans
= child
->answer
;
1157 const adns_sockaddr
*queried
;
1158 const unsigned char *found
;
1159 adns_state ads
= parent
->ads
;
1162 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
1163 adns__query_fail(parent
,adns_s_inconsistent
);
1165 } else if (cans
->status
) {
1166 adns__query_fail(parent
,cans
->status
);
1170 queried
= &parent
->ctx
.tinfo
.ptr
.addr
;
1171 for (i
=0, found
=cans
->rrs
.bytes
; i
<cans
->nrrs
; i
++, found
+=cans
->rrsz
) {
1172 if (adns__addrs_equal_raw(&queried
->sa
,
1173 parent
->ctx
.tinfo
.ptr
.addr
.sa
.sa_family
,found
)) {
1174 if (!parent
->children
.head
) {
1175 adns__query_done(parent
);
1178 LIST_LINK_TAIL(ads
->childw
,parent
);
1184 adns__query_fail(parent
,adns_s_inconsistent
);
1187 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
1188 int max
, void *datap
) {
1191 adns_rrtype rrtype
= pai
->qu
->ctx
.tinfo
.ptr
.rev_rrtype
;
1197 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
1198 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1200 if (cbyte
!= max
) return adns_s_invaliddata
;
1202 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
1203 pai
->dgram
, pai
->dglen
, dmstart
,
1204 rrtype
, adns_qf_quoteok_query
);
1208 ctx
.callback
= icb_ptr
;
1209 memset(&ctx
.pinfo
,0,sizeof(ctx
.pinfo
));
1210 memset(&ctx
.tinfo
,0,sizeof(ctx
.tinfo
));
1211 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(rrtype
),
1212 rrtype
, &pai
->qu
->vb
, id
,
1213 adns_qf_quoteok_query
, pai
->now
, &ctx
);
1216 nqu
->parent
= pai
->qu
;
1217 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
1225 static void mf_strpair(adns_query qu
, void *datap
) {
1226 adns_rr_strpair
*rrp
= datap
;
1228 adns__makefinal_str(qu
,&rrp
->array
[0]);
1229 adns__makefinal_str(qu
,&rrp
->array
[1]);
1236 static void mf_intstrpair(adns_query qu
, void *datap
) {
1237 adns_rr_intstrpair
*rrp
= datap
;
1239 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
1240 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
1247 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
1248 int max
, void *datap
) {
1249 adns_rr_intstrpair
*rrp
= datap
;
1253 for (i
=0; i
<2; i
++) {
1254 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
1258 if (cbyte
!= max
) return adns_s_invaliddata
;
1264 * _mailbox (pap,cs +pap_mailbox822)
1267 static adns_status
pap_mailbox822(const parseinfo
*pai
,
1268 int *cbyte_io
, int max
, char **mb_r
) {
1269 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
1270 const unsigned char *p
;
1272 findlabel_state fls
;
1278 adns__findlabel_start(&fls
, pai
->ads
,
1280 pai
->dgram
, pai
->dglen
, max
,
1281 *cbyte_io
, cbyte_io
);
1282 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
1284 adns__vbuf_appendstr(vb
,".");
1289 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
1291 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
1292 if (c
== '.' && !neednorm
) neednorm
= 1;
1293 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
1297 if (needquote
|| neednorm
) {
1298 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
1299 adns__vbuf_appendq(vb
,"\"",1);
1300 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
1302 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
1303 adns__vbuf_appendq(vb
,p
,1);
1305 adns__vbuf_appendq(vb
,"\"",1);
1307 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
1310 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
1312 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
1316 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
1317 memcpy(str
,vb
->buf
,vb
->used
);
1323 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
1325 if (pai
->qu
->typei
->typekey
& adns__qtf_mail822
) {
1326 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
1328 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
1332 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
1333 return csp_domain(vb
,mailbox
);
1340 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
1341 int max
, void *datap
) {
1342 adns_rr_strpair
*rrp
= datap
;
1345 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
1348 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
1351 if (cbyte
!= max
) return adns_s_invaliddata
;
1355 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
1356 const adns_rr_strpair
*rrp
= datap
;
1359 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
1361 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
1370 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
1371 int max
, void *datap
) {
1372 adns_rr_soa
*rrp
= datap
;
1373 const byte
*dgram
= pai
->dgram
;
1377 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
1378 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1381 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
1384 if (cbyte
+20 != max
) return adns_s_invaliddata
;
1386 for (i
=0; i
<5; i
++) {
1389 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
1395 static void mf_soa(adns_query qu
, void *datap
) {
1396 adns_rr_soa
*rrp
= datap
;
1398 adns__makefinal_str(qu
,&rrp
->mname
);
1399 adns__makefinal_str(qu
,&rrp
->rname
);
1402 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
1403 const adns_rr_soa
*rrp
= datap
;
1408 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
1410 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
1412 for (i
=0; i
<5; i
++) {
1413 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1421 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
1424 static adns_status
ckl_srv(adns_state ads
, adns_queryflags flags
,
1425 union checklabel_state
*cls
, qcontext
*ctx
,
1426 int labnum
, const char *label
, int lablen
) {
1427 if (labnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1428 if (!lablen
|| label
[0] != '_') return adns_s_querydomaininvalid
;
1431 return adns__ckl_hostname(ads
, flags
, cls
, ctx
, labnum
, label
, lablen
);
1434 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1436 /* might be adns_rr_srvraw* */) {
1437 const byte
*dgram
= pai
->dgram
;
1441 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1443 rrp
->priority
= GET_W(cbyte
, ti
);
1444 rrp
->weight
= GET_W(cbyte
, ti
);
1445 rrp
->port
= GET_W(cbyte
, ti
);
1449 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1450 int max
, void *datap
) {
1451 adns_rr_srvraw
*rrp
= datap
;
1454 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1457 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1458 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1461 if (cbyte
!= max
) return adns_s_invaliddata
;
1465 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1466 int max
, void *datap
) {
1467 adns_rr_srvha
*rrp
= datap
;
1470 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1471 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1472 if (cbyte
!= max
) return adns_s_invaliddata
;
1476 static void mf_srvraw(adns_query qu
, void *datap
) {
1477 adns_rr_srvraw
*rrp
= datap
;
1478 adns__makefinal_str(qu
, &rrp
->host
);
1481 static void mf_srvha(adns_query qu
, void *datap
) {
1482 adns_rr_srvha
*rrp
= datap
;
1483 mfp_hostaddr(qu
,&rrp
->ha
);
1486 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1487 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1488 /* might be const adns_rr_svhostaddr* */
1490 if (ap
->priority
< bp
->priority
) return 0;
1491 if (ap
->priority
> bp
->priority
) return 1;
1495 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1496 /* might be adns_rr_srvraw* */) {
1498 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1503 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1504 const adns_rr_srvraw
*rrp
= datap
;
1507 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1508 return csp_domain(vb
,rrp
->host
);
1511 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1512 const adns_rr_srvha
*rrp
= datap
;
1515 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1516 return csp_hostaddr(vb
,&rrp
->ha
);
1519 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,int rrsz
,
1520 const struct typeinfo
*typei
) {
1521 /* we treat everything in the array as if it were an adns_rr_srvha
1522 * even though the array might be of adns_rr_srvraw. That's OK
1523 * because they have the same prefix, which is all we access.
1524 * We use rrsz, too, rather than naive array indexing, of course.
1526 char *workbegin
, *workend
, *search
, *arrayend
;
1527 const adns_rr_srvha
*rr
;
1528 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1529 int cpriority
, totalweight
, runtotal
;
1532 assert(rrsz
<= sizeof(rrtmp
));
1533 for (workbegin
= array
, arrayend
= workbegin
+ rrsz
* nrrs
;
1534 workbegin
< arrayend
;
1535 workbegin
= workend
) {
1536 cpriority
= (rr
=(void*)workbegin
)->priority
;
1538 for (workend
= workbegin
, totalweight
= 0;
1539 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1541 totalweight
+= rr
->weight
;
1544 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1545 * cpriority. From now on, workbegin points to the `remaining'
1546 * records: we select one record at a time (RFC2782 `Usage rules'
1547 * and `Format of the SRV RR' subsection `Weight') to place at
1548 * workbegin (swapping with the one that was there, and then
1549 * advance workbegin. */
1551 workbegin
+ rrsz
< workend
; /* don't bother if just one */
1552 workbegin
+= rrsz
) {
1554 randval
= nrand48(ads
->rand48xsubi
);
1555 randval
%= (totalweight
+ 1);
1556 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1557 * totalweight must be <= 2^26 so probability nonuniformity is
1558 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1559 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1562 for (search
=workbegin
, runtotal
=0;
1563 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1565 assert(search
< arrayend
);
1566 totalweight
-= rr
->weight
;
1567 if (search
!= workbegin
) {
1568 memcpy(&rrtmp
, workbegin
, rrsz
);
1569 memcpy(workbegin
, search
, rrsz
);
1570 memcpy(search
, &rrtmp
, rrsz
);
1575 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1576 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1577 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1585 static void mf_byteblock(adns_query qu
, void *datap
) {
1586 adns_rr_byteblock
*rrp
= datap
;
1587 void *bytes
= rrp
->data
;
1588 adns__makefinal_block(qu
,&bytes
,rrp
->len
);
1596 static adns_status
pa_opaque(const parseinfo
*pai
, int cbyte
,
1597 int max
, void *datap
) {
1598 adns_rr_byteblock
*rrp
= datap
;
1600 rrp
->len
= max
- cbyte
;
1601 rrp
->data
= adns__alloc_interim(pai
->qu
, rrp
->len
);
1602 if (!rrp
->data
) R_NOMEM
;
1603 memcpy(rrp
->data
, pai
->dgram
+ cbyte
, rrp
->len
);
1607 static adns_status
cs_opaque(vbuf
*vb
, const void *datap
) {
1608 const adns_rr_byteblock
*rrp
= datap
;
1613 sprintf(buf
,"\\# %d",rrp
->len
);
1616 for (l
= rrp
->len
, p
= rrp
->data
;
1619 sprintf(buf
," %02x%02x%02x%02x",p
[0],p
[1],p
[2],p
[3]);
1625 sprintf(buf
," %02x",*p
);
1635 static void mf_flat(adns_query qu
, void *data
) { }
1641 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1643 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1644 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1645 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1646 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1648 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1649 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1650 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1651 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1656 static const typeinfo typeinfos
[] = {
1657 /* Must be in ascending order of rrtype ! */
1658 /* mem-mgmt code rrt fmt member parser comparer printer */
1660 FLAT_TYPE(a
, "A", 0, inaddr
, inaddr
, inaddr
,inaddr
),
1661 DEEP_TYPE(ns_raw
, "NS", "raw",str
, host_raw
,0, domain
),
1662 DEEP_TYPE(cname
, "CNAME", 0, str
, dom_raw
, 0, domain
),
1663 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, soa
, 0, soa
),
1664 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, host_raw
,0, domain
),
1665 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,hinfo
, 0, hinfo
),
1666 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, mx_raw
, mx_raw
,inthost
),
1667 DEEP_TYPE(txt
, "TXT", 0, manyistr
, txt
, 0, txt
),
1668 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, rp
, 0, rp
),
1669 FLAT_TYPE(aaaa
, "AAAA", 0, in6addr
, in6addr
, in6addr
,in6addr
),
1670 DEEP_TYPE(srv_raw
,"SRV", "raw",srvraw
, srvraw
, srv
, srvraw
,
1671 .checklabel
= ckl_srv
, .postsort
= postsort_srv
),
1673 FLAT_TYPE(addr
, "A", "addr", addr
, addr
, addr
, addr
,
1674 .getrrsz
= gsz_addr
, .query_send
= qs_addr
),
1675 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
, hostaddr
,hostaddr
,hostaddr
),
1676 DEEP_TYPE(ptr
, "PTR","checked",str
, ptr
, 0, domain
,
1677 .checklabel
= ckl_ptr
),
1678 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,mx
, mx
, inthostaddr
, ),
1679 DEEP_TYPE(srv
, "SRV","+addr",srvha
, srvha
, srv
, srvha
,
1680 .checklabel
= ckl_srv
, .postsort
= postsort_srv
),
1682 DEEP_TYPE(soa
, "SOA","822", soa
, soa
, 0, soa
),
1683 DEEP_TYPE(rp
, "RP", "822", strpair
, rp
, 0, rp
),
1686 static const typeinfo tinfo_addrsub
=
1687 FLAT_TYPE(none
, "<addr>","sub",addr
, addr
, 0, addr
,
1688 .getrrsz
= gsz_addr
);
1690 static const typeinfo typeinfo_unknown
=
1691 DEEP_TYPE(unknown
,0, "unknown",byteblock
,opaque
, 0, opaque
);
1693 const typeinfo
*adns__findtype(adns_rrtype type
) {
1694 const typeinfo
*begin
, *end
, *mid
;
1696 if (type
& adns_r_unknown
) return &typeinfo_unknown
;
1697 type
&= adns_rrt_reprmask
;
1699 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1701 while (begin
< end
) {
1702 mid
= begin
+ ((end
-begin
)>>1);
1703 if (mid
->typekey
== type
) return mid
;
1704 if (type
> mid
->typekey
) begin
= mid
+1;