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.
29 #include <sys/types.h>
30 #include <sys/socket.h>
31 #include <netinet/in.h>
32 #include <arpa/inet.h>
36 #define R_NOMEM return adns_s_nomemory
37 #define CSP_ADDSTR(s) do { \
38 if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \
45 * _textdata, _qstring (csp)
51 * +search_sortlist, dip_genaddr, csp_genaddr)
53 * _addr (pa,di,div,csp,cs,gsz,qs
54 * +search_sortlst_sa, dip_sockaddr,
55 * addr_rrtypes, icb_addr)
56 * _domain (pap,csp,cs)
59 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs
60 * +pap_findaddrs, icb_hostaddr)
63 * _inthostaddr (mf,cs)
65 * _ptr (ckl,pa +icb_ptr)
69 * _mailbox (pap,csp +pap_mailbox822)
72 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
77 * within each section:
96 static adns_status
pap_qstring(const parseinfo
*pai
, int *cbyte_io
, int max
,
97 int *len_r
, char **str_r
) {
98 /* Neither len_r nor str_r may be null.
99 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
101 const byte
*dgram
= pai
->dgram
;
107 if (cbyte
>= max
) return adns_s_invaliddata
;
109 if (cbyte
+l
> max
) return adns_s_invaliddata
;
111 str
= adns__alloc_interim(pai
->qu
, l
+1);
115 memcpy(str
,dgram
+cbyte
,l
);
124 static adns_status
csp_qstring(vbuf
*vb
, const char *dp
, int len
) {
130 for (cn
=0; cn
<len
; cn
++) {
134 } else if (ch
== '"') {
136 } else if (ch
>= 32 && ch
<= 126) {
137 if (!adns__vbuf_append(vb
,&ch
,1)) R_NOMEM
;
139 sprintf(buf
,"\\x%02x",ch
);
152 static void mf_str(adns_query qu
, void *datap
) {
155 adns__makefinal_str(qu
,rrp
);
162 static void mf_intstr(adns_query qu
, void *datap
) {
163 adns_rr_intstr
*rrp
= datap
;
165 adns__makefinal_str(qu
,&rrp
->str
);
172 static void mf_manyistr(adns_query qu
, void *datap
) {
173 adns_rr_intstr
**rrp
= datap
;
174 adns_rr_intstr
*te
, *table
;
178 for (tc
=0, te
= *rrp
; te
->i
>= 0; te
++, tc
++);
180 adns__makefinal_block(qu
,&tablev
,sizeof(*te
)*(tc
+1));
182 for (te
= *rrp
; te
->i
>= 0; te
++)
183 adns__makefinal_str(qu
,&te
->str
);
190 static adns_status
pa_txt(const parseinfo
*pai
, int cbyte
,
191 int max
, void *datap
) {
192 adns_rr_intstr
**rrp
= datap
, *table
, *te
;
193 const byte
*dgram
= pai
->dgram
;
194 int ti
, tc
, l
, startbyte
;
198 if (cbyte
>= max
) return adns_s_invaliddata
;
200 while (cbyte
< max
) {
205 if (cbyte
!= max
|| !tc
) return adns_s_invaliddata
;
207 table
= adns__alloc_interim(pai
->qu
,sizeof(*table
)*(tc
+1));
210 for (cbyte
=startbyte
, ti
=0, te
=table
; ti
<tc
; ti
++, te
++) {
211 st
= pap_qstring(pai
, &cbyte
, max
, &te
->i
, &te
->str
);
214 assert(cbyte
== max
);
223 static adns_status
cs_txt(vbuf
*vb
, const void *datap
) {
224 const adns_rr_intstr
*const *rrp
= datap
;
225 const adns_rr_intstr
*current
;
229 for (current
= *rrp
, spc
=0; current
->i
>= 0; current
++, spc
=1) {
230 if (spc
) CSP_ADDSTR(" ");
231 st
= csp_qstring(vb
,current
->str
,current
->i
); if (st
) return st
;
240 static adns_status
cs_hinfo(vbuf
*vb
, const void *datap
) {
241 const adns_rr_intstrpair
*rrp
= datap
;
244 st
= csp_qstring(vb
,rrp
->array
[0].str
,rrp
->array
[0].i
); if (st
) return st
;
246 st
= csp_qstring(vb
,rrp
->array
[1].str
,rrp
->array
[1].i
); if (st
) return st
;
251 * _inaddr (pa,di,cs +search_sortlist, dip_genaddr, csp_genaddr)
254 static adns_status
pa_inaddr(const parseinfo
*pai
, int cbyte
,
255 int max
, void *datap
) {
256 struct in_addr
*storeto
= datap
;
258 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
259 memcpy(storeto
, pai
->dgram
+ cbyte
, 4);
263 static int search_sortlist(adns_state ads
, int af
, const void *ad
) {
264 const struct sortlist
*slp
;
265 const struct in6_addr
*a6
;
270 if (af
== AF_INET6
) {
272 if (IN6_IS_ADDR_V4MAPPED(a6
)) {
273 a
.v4
.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_match_p(af
,ad
, slp
->af
,&slp
->base
,&slp
->mask
) &&
285 adns__addr_match_p(AF_INET
,&a
, slp
->af
,&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__sockaddr_inject(p
, 0, &a
.addr
.sa
);
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 (pa,di,div,csp,cs,gsz,qs
347 * +search_sortlist_sa, dip_sockaddr, addr_rrtypes, icb_addr)
350 static const typeinfo tinfo_addrsub
;
352 #define ADDR_RRTYPES(_) _(a)
354 static const adns_rrtype addr_all_rrtypes
[] = {
355 #define RRTY_CODE(ty) adns_r_##ty,
356 ADDR_RRTYPES(RRTY_CODE
)
361 #define RRTY_INDEX(ty) addr__ri_##ty,
362 ADDR_RRTYPES(RRTY_INDEX
)
365 #define RRTY_FLAG(ty) addr_rf_##ty = 1 << addr__ri_##ty,
366 ADDR_RRTYPES(RRTY_FLAG
)
371 static unsigned addr_rrtypeflag(adns_rrtype type
) {
374 type
&= adns_rrt_typemask
;
375 for (i
=0; i
<addr_nrrtypes
&& type
!=addr_all_rrtypes
[i
]; i
++);
376 return i
< addr_nrrtypes ?
1 << i
: 0;
379 static adns_status
pa_addr(const parseinfo
*pai
, int cbyte
,
380 int max
, void *datap
) {
381 adns_rr_addr
*storeto
= datap
;
382 const byte
*dgram
= pai
->dgram
;
384 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
385 storeto
->len
= sizeof(storeto
->addr
.inet
);
386 memset(&storeto
->addr
,0,sizeof(storeto
->addr
.inet
));
387 storeto
->addr
.inet
.sin_family
= AF_INET
;
388 memcpy(&storeto
->addr
.inet
.sin_addr
,dgram
+cbyte
,4);
392 static int search_sortlist_sa(adns_state ads
, const struct sockaddr
*sa
) {
394 adns__sockaddr_extract(sa
, &a
, 0);
395 return search_sortlist(ads
, sa
->sa_family
, &a
);
398 static int dip_sockaddr(adns_state ads
,
399 const struct sockaddr
*sa
,
400 const struct sockaddr
*sb
) {
401 if (!ads
->sortlist
) return 0;
402 return search_sortlist_sa(ads
, sa
) > search_sortlist_sa(ads
, sb
);
405 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
406 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
407 return dip_sockaddr(ads
, &ap
->addr
.sa
, &bp
->addr
.sa
);
410 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
411 const adns_state ads
= context
;
413 return di_addr(ads
, datap_a
, datap_b
);
416 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
417 char buf
[ADNS_ADDR2TEXT_BUFLEN
];
418 int len
= sizeof(buf
);
421 switch (rrp
->addr
.inet
.sin_family
) {
426 CSP_ADDSTR("INET6 ");
429 err
= adns_addr2text(&rrp
->addr
.sa
,0, buf
,&len
, 0); assert(!err
);
433 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
440 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
441 const adns_rr_addr
*rrp
= datap
;
443 return csp_addr(vb
,rrp
);
446 static int gsz_addr(const typeinfo
*typei
, adns_rrtype type
) {
447 return type
& adns__qtf_bigaddr ?
448 sizeof(adns_rr_addr
) : sizeof(adns_rr_addr_v4only
);
451 static unsigned addr_rrtypes(adns_state ads
, adns_rrtype type
,
452 adns_queryflags qf
) {
453 /* Return a mask of addr_rf_... flags indicating which address families are
454 * wanted, given a query type and flags.
459 static void icb_addr(adns_query parent
, adns_query child
);
461 static void addr_subqueries(adns_query qu
, struct timeval now
,
462 adns_queryflags qf_extra
,
463 const byte
*qd_dgram
, int qd_dglen
) {
466 adns_queryflags qf
= (qu
->flags
& ~adns_qf_search
) | qf_extra
;
467 adns_rrtype qtf
= qu
->answer
->type
& adns__qtf_deref
;
468 unsigned which
= qu
->ctx
.tinfo
.addr
.want
& ~qu
->ctx
.tinfo
.addr
.have
;
471 memset(&ctx
, 0, sizeof(ctx
));
472 ctx
.callback
= icb_addr
;
473 for (i
=0; i
<addr_nrrtypes
; i
++) {
474 if (!(which
& (1 << i
))) continue;
475 err
= adns__mkquery_frdgram(qu
->ads
, &qu
->vb
, &id
, qd_dgram
,qd_dglen
,
476 DNS_HDRSIZE
, addr_all_rrtypes
[i
], qf
);
477 if (err
) goto x_error
;
478 err
= adns__internal_submit(qu
->ads
, &cqu
, &tinfo_addrsub
,
479 addr_all_rrtypes
[i
] | qtf
,
480 &qu
->vb
, id
, qf
, now
, &ctx
);
481 if (err
) goto x_error
;
482 cqu
->answer
->rrsz
= qu
->answer
->rrsz
;
484 LIST_LINK_TAIL_PART(qu
->children
, cqu
,siblings
.);
486 qu
->state
= query_childw
;
487 LIST_LINK_TAIL(qu
->ads
->childw
, qu
);
491 adns__query_fail(qu
, err
);
494 static adns_status
append_addrs(adns_query qu
, size_t rrsz
,
495 adns_rr_addr
**dp
, int *dlen
,
496 const adns_rr_addr
*sp
, int slen
) {
497 /* Append a vector of slen addr records, each of size rrsz, starting at ap,
498 * to a vector starting at *dp, of length *dlen. On successful completion,
499 * *dp and *dlen are updated.
502 size_t drrsz
= *dlen
*rrsz
, srrsz
= slen
*rrsz
;
505 if (!slen
) return adns_s_ok
;
506 p
= adns__alloc_interim(qu
, drrsz
+ srrsz
);
509 memcpy(p
, *dp
, drrsz
);
510 adns__free_interim(qu
, *dp
);
512 memcpy(p
+ drrsz
, sp
, srrsz
);
514 *dp
= (adns_rr_addr
*)p
;
518 static void propagate_ttl(adns_query to
, adns_query from
)
519 { if (to
->expires
> from
->expires
) to
->expires
= from
->expires
; }
521 static adns_status
copy_cname_from_child(adns_query parent
, adns_query child
) {
522 adns_answer
*pans
= parent
->answer
, *cans
= child
->answer
;
523 size_t n
= strlen(cans
->cname
) + 1;
525 pans
->cname
= adns__alloc_preserved(parent
, n
);
526 if (!pans
->cname
) R_NOMEM
;
527 memcpy(pans
->cname
, cans
->cname
, n
);
531 static void done_addr_type(adns_query qu
, adns_rrtype type
) {
532 unsigned f
= addr_rrtypeflag(type
);
533 assert(f
); qu
->ctx
.tinfo
.addr
.have
|= f
;
536 static void icb_addr(adns_query parent
, adns_query child
) {
537 adns_state ads
= parent
->ads
;
538 adns_answer
*pans
= parent
->answer
, *cans
= child
->answer
;
542 propagate_ttl(parent
, child
);
544 if (cans
->cname
&& !pans
->cname
) {
545 err
= copy_cname_from_child(parent
, child
);
549 if ((parent
->flags
& adns_qf_search
) &&
550 !pans
->cname
&& cans
->status
== adns_s_nxdomain
) {
551 /* We're searching a list of suffixes, and the name doesn't exist. Try
555 adns__cancel_children(parent
);
556 adns__free_interim(parent
, pans
->rrs
.bytes
);
557 pans
->rrs
.bytes
= 0; pans
->nrrs
= 0;
558 if (gettimeofday(&now
, 0)) goto x_gtod
;
559 adns__search_next(ads
, parent
, now
);
563 if (cans
->status
&& cans
->status
!= adns_s_nodata
)
564 { err
= cans
->status
; goto x_err
; }
566 assert(pans
->rrsz
== cans
->rrsz
);
567 err
= append_addrs(parent
, pans
->rrsz
,
568 &pans
->rrs
.addr
, &pans
->nrrs
,
569 cans
->rrs
.addr
, cans
->nrrs
);
571 done_addr_type(parent
, cans
->type
);
573 if (parent
->children
.head
) LIST_LINK_TAIL(ads
->childw
, parent
);
574 else if (!pans
->nrrs
) adns__query_fail(parent
, adns_s_nodata
);
575 else adns__query_done(parent
);
579 adns__diag(ads
, -1, parent
, "gettimeofday failed: %s", strerror(errno
));
580 err
= adns_s_systemfail
;
584 adns__query_fail(parent
, err
);
587 static void qs_addr(adns_query qu
, struct timeval now
) {
588 if (!qu
->ctx
.tinfo
.addr
.want
) {
589 qu
->ctx
.tinfo
.addr
.want
= addr_rrtypes(qu
->ads
, qu
->answer
->type
,
591 qu
->ctx
.tinfo
.addr
.have
= 0;
593 addr_subqueries(qu
, now
, 0, qu
->query_dgram
, qu
->query_dglen
);
597 * _domain (pap,csp,cs)
601 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
602 char **domain_r
, parsedomain_flags flags
) {
606 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
607 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
609 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
611 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
614 dm
[pai
->qu
->vb
.used
]= 0;
615 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
621 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
623 if (!*domain
) CSP_ADDSTR(".");
627 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
628 const char *const *domainp
= datap
;
629 return csp_domain(vb
,*domainp
);
632 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
633 int max
, void *datap
) {
637 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
640 if (cbyte
!= max
) return adns_s_invaliddata
;
648 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
649 int max
, void *datap
) {
653 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
654 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
657 if (cbyte
!= max
) return adns_s_invaliddata
;
662 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
665 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
667 int *cbyte_io
, int count
, int dmstart
) {
669 int type
, class, rdlen
, rdstart
, ownermatched
;
673 for (rri
=0, naddrs
=-1; rri
<count
; rri
++) {
674 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
675 pai
->dglen
, cbyte_io
,
676 &type
, &class, &ttl
, &rdlen
, &rdstart
,
677 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
679 if (!ownermatched
|| class != DNS_CLASS_IN
|| type
!= adns_r_a
) {
680 if (naddrs
>0) break; else continue;
685 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*addrsz
))
687 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
688 st
= pa_addr(pai
, rdstart
,rdstart
+rdlen
, pai
->qu
->vb
.buf
+ naddrs
*addrsz
);
693 ha
->addrs
= adns__alloc_interim(pai
->qu
, naddrs
*addrsz
);
694 if (!ha
->addrs
) R_NOMEM
;
695 memcpy(ha
->addrs
, pai
->qu
->vb
.buf
, naddrs
*addrsz
);
697 ha
->astatus
= adns_s_ok
;
699 adns__isort(ha
->addrs
, naddrs
, addrsz
, pai
->qu
->vb
.buf
,
705 static void icb_hostaddr(adns_query parent
, adns_query child
) {
706 adns_answer
*cans
= child
->answer
;
707 adns_rr_hostaddr
*rrp
= child
->ctx
.pinfo
.hostaddr
;
708 adns_state ads
= parent
->ads
;
713 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : cans
->nrrs
;
714 rrp
->addrs
= cans
->rrs
.addr
;
715 adns__transfer_interim(child
, parent
, rrp
->addrs
);
717 if (parent
->children
.head
) {
718 LIST_LINK_TAIL(ads
->childw
,parent
);
720 adns__query_done(parent
);
724 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
725 int max
, adns_rr_hostaddr
*rrp
) {
731 adns_queryflags nflags
;
732 size_t addrsz
= gsz_addr(0, pai
->qu
->answer
->type
);
734 dmstart
= cbyte
= *cbyte_io
;
735 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
736 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
740 rrp
->astatus
= adns_s_ok
;
746 st
= pap_findaddrs(pai
, rrp
,addrsz
, &cbyte
, pai
->nscount
, dmstart
);
748 if (rrp
->naddrs
!= -1) return adns_s_ok
;
750 st
= pap_findaddrs(pai
, rrp
,addrsz
, &cbyte
, pai
->arcount
, dmstart
);
752 if (rrp
->naddrs
!= -1) return adns_s_ok
;
754 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
755 pai
->dgram
, pai
->dglen
, dmstart
,
756 adns_r_addr
, adns_qf_quoteok_query
);
760 ctx
.callback
= icb_hostaddr
;
761 ctx
.pinfo
.hostaddr
= rrp
;
762 memset(&ctx
.tinfo
, 0, sizeof(ctx
.tinfo
));
764 nflags
= adns_qf_quoteok_query
;
765 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
767 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(adns_r_addr
),
768 ((adns_r_addr
& adns_rrt_reprmask
) |
769 (pai
->qu
->answer
->type
& ~adns_rrt_reprmask
)),
770 &pai
->qu
->vb
, id
, nflags
, pai
->now
, &ctx
);
773 nqu
->parent
= pai
->qu
;
774 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
779 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
780 int max
, void *datap
) {
781 adns_rr_hostaddr
*rrp
= datap
;
784 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
786 if (cbyte
!= max
) return adns_s_invaliddata
;
791 static int dip_hostaddr(adns_state ads
,
792 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
793 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
794 if (ap
->astatus
) return 0;
796 return dip_sockaddr(ads
, &ap
->addrs
[0].addr
.sa
, &bp
->addrs
[0].addr
.sa
);
799 static int di_hostaddr(adns_state ads
,
800 const void *datap_a
, const void *datap_b
) {
801 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
803 return dip_hostaddr(ads
, ap
,bp
);
806 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
808 size_t addrsz
= gsz_addr(0, qu
->answer
->type
);
810 adns__makefinal_str(qu
,&rrp
->host
);
812 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*addrsz
);
816 static void mf_hostaddr(adns_query qu
, void *datap
) {
817 adns_rr_hostaddr
*rrp
= datap
;
819 mfp_hostaddr(qu
,rrp
);
822 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
828 st
= csp_domain(vb
,rrp
->host
); if (st
) return st
;
831 CSP_ADDSTR(adns_errtypeabbrev(rrp
->astatus
));
833 sprintf(buf
," %d ",rrp
->astatus
);
836 CSP_ADDSTR(adns_errabbrev(rrp
->astatus
));
839 errstr
= adns_strerror(rrp
->astatus
);
840 st
= csp_qstring(vb
,errstr
,strlen(errstr
)); if (st
) return st
;
842 if (rrp
->naddrs
>= 0) {
844 for (i
=0; i
<rrp
->naddrs
; i
++) {
846 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
855 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
856 const adns_rr_hostaddr
*rrp
= datap
;
858 return csp_hostaddr(vb
,rrp
);
865 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
,
866 int max
, void *datap
) {
867 const byte
*dgram
= pai
->dgram
;
868 adns_rr_intstr
*rrp
= datap
;
872 if (cbyte
+2 > max
) return adns_s_invaliddata
;
875 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
876 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
879 if (cbyte
!= max
) return adns_s_invaliddata
;
883 static int di_mx_raw(adns_state ads
, const void *datap_a
, const void *datap_b
) {
884 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
886 if (ap
->i
< bp
->i
) return 0;
887 if (ap
->i
> bp
->i
) return 1;
895 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
,
896 int max
, void *datap
) {
897 const byte
*dgram
= pai
->dgram
;
898 adns_rr_inthostaddr
*rrp
= datap
;
902 if (cbyte
+2 > max
) return adns_s_invaliddata
;
905 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
908 if (cbyte
!= max
) return adns_s_invaliddata
;
912 static int di_mx(adns_state ads
, const void *datap_a
, const void *datap_b
) {
913 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
915 if (ap
->i
< bp
->i
) return 0;
916 if (ap
->i
> bp
->i
) return 1;
917 return dip_hostaddr(ads
, &ap
->ha
, &bp
->ha
);
921 * _inthostaddr (mf,cs)
924 static void mf_inthostaddr(adns_query qu
, void *datap
) {
925 adns_rr_inthostaddr
*rrp
= datap
;
927 mfp_hostaddr(qu
,&rrp
->ha
);
930 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
931 const adns_rr_inthostaddr
*rrp
= datap
;
934 sprintf(buf
,"%u ",rrp
->i
);
937 return csp_hostaddr(vb
,&rrp
->ha
);
944 static adns_status
cs_inthost(vbuf
*vb
, const void *datap
) {
945 const adns_rr_intstr
*rrp
= datap
;
948 sprintf(buf
,"%u ",rrp
->i
);
950 return csp_domain(vb
,rrp
->str
);
954 * _ptr (ckl,pa +icb_ptr)
957 static adns_status
ckl_ptr(adns_state ads
, adns_queryflags flags
,
958 union checklabel_state
*cls
, qcontext
*ctx
,
959 int labnum
, const char *label
, int lablen
) {
961 if (adns__revparse_label(&cls
->ptr
, labnum
, label
,lablen
))
962 return adns_s_querydomainwrong
;
964 if (adns__revparse_done(&cls
->ptr
, labnum
,
965 &ctx
->tinfo
.ptr
.rev_rrtype
,
966 &ctx
->tinfo
.ptr
.addr
))
967 return adns_s_querydomainwrong
;
972 static void icb_ptr(adns_query parent
, adns_query child
) {
973 adns_answer
*cans
= child
->answer
;
974 const struct af_addr
*queried
;
975 const unsigned char *found
;
976 adns_state ads
= parent
->ads
;
979 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
980 adns__query_fail(parent
,adns_s_inconsistent
);
982 } else if (cans
->status
) {
983 adns__query_fail(parent
,cans
->status
);
987 queried
= &parent
->ctx
.tinfo
.ptr
.addr
;
988 for (i
=0, found
=cans
->rrs
.bytes
; i
<cans
->nrrs
; i
++, found
+=cans
->rrsz
) {
989 if (adns__genaddr_equal_p(queried
->af
,&queried
->addr
,
990 parent
->ctx
.tinfo
.ptr
.addr
.af
,found
)) {
991 if (!parent
->children
.head
) {
992 adns__query_done(parent
);
995 LIST_LINK_TAIL(ads
->childw
,parent
);
1001 adns__query_fail(parent
,adns_s_inconsistent
);
1004 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
1005 int max
, void *datap
) {
1008 adns_rrtype rrtype
= pai
->qu
->ctx
.tinfo
.ptr
.rev_rrtype
;
1014 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
1015 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1017 if (cbyte
!= max
) return adns_s_invaliddata
;
1019 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
1020 pai
->dgram
, pai
->dglen
, dmstart
,
1021 rrtype
, adns_qf_quoteok_query
);
1025 ctx
.callback
= icb_ptr
;
1026 memset(&ctx
.pinfo
,0,sizeof(ctx
.pinfo
));
1027 memset(&ctx
.tinfo
,0,sizeof(ctx
.tinfo
));
1028 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(rrtype
),
1029 rrtype
, &pai
->qu
->vb
, id
,
1030 adns_qf_quoteok_query
, pai
->now
, &ctx
);
1033 nqu
->parent
= pai
->qu
;
1034 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
1042 static void mf_strpair(adns_query qu
, void *datap
) {
1043 adns_rr_strpair
*rrp
= datap
;
1045 adns__makefinal_str(qu
,&rrp
->array
[0]);
1046 adns__makefinal_str(qu
,&rrp
->array
[1]);
1053 static void mf_intstrpair(adns_query qu
, void *datap
) {
1054 adns_rr_intstrpair
*rrp
= datap
;
1056 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
1057 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
1064 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
1065 int max
, void *datap
) {
1066 adns_rr_intstrpair
*rrp
= datap
;
1070 for (i
=0; i
<2; i
++) {
1071 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
1075 if (cbyte
!= max
) return adns_s_invaliddata
;
1081 * _mailbox (pap,cs +pap_mailbox822)
1084 static adns_status
pap_mailbox822(const parseinfo
*pai
,
1085 int *cbyte_io
, int max
, char **mb_r
) {
1086 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
1087 const unsigned char *p
;
1089 findlabel_state fls
;
1095 adns__findlabel_start(&fls
, pai
->ads
,
1097 pai
->dgram
, pai
->dglen
, max
,
1098 *cbyte_io
, cbyte_io
);
1099 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
1101 adns__vbuf_appendstr(vb
,".");
1106 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
1108 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
1109 if (c
== '.' && !neednorm
) neednorm
= 1;
1110 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
1114 if (needquote
|| neednorm
) {
1115 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
1116 adns__vbuf_appendq(vb
,"\"",1);
1117 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
1119 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
1120 adns__vbuf_appendq(vb
,p
,1);
1122 adns__vbuf_appendq(vb
,"\"",1);
1124 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
1127 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
1129 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
1133 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
1134 memcpy(str
,vb
->buf
,vb
->used
);
1140 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
1142 if (pai
->qu
->typei
->typekey
& adns__qtf_mail822
) {
1143 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
1145 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
1149 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
1150 return csp_domain(vb
,mailbox
);
1157 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
1158 int max
, void *datap
) {
1159 adns_rr_strpair
*rrp
= datap
;
1162 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
1165 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
1168 if (cbyte
!= max
) return adns_s_invaliddata
;
1172 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
1173 const adns_rr_strpair
*rrp
= datap
;
1176 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
1178 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
1187 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
1188 int max
, void *datap
) {
1189 adns_rr_soa
*rrp
= datap
;
1190 const byte
*dgram
= pai
->dgram
;
1194 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
1195 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1198 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
1201 if (cbyte
+20 != max
) return adns_s_invaliddata
;
1203 for (i
=0; i
<5; i
++) {
1206 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
1212 static void mf_soa(adns_query qu
, void *datap
) {
1213 adns_rr_soa
*rrp
= datap
;
1215 adns__makefinal_str(qu
,&rrp
->mname
);
1216 adns__makefinal_str(qu
,&rrp
->rname
);
1219 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
1220 const adns_rr_soa
*rrp
= datap
;
1225 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
1227 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
1229 for (i
=0; i
<5; i
++) {
1230 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1238 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
1241 static adns_status
ckl_srv(adns_state ads
, adns_queryflags flags
,
1242 union checklabel_state
*cls
, qcontext
*ctx
,
1243 int labnum
, const char *label
, int lablen
) {
1244 if (labnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1245 if (!lablen
|| label
[0] != '_') return adns_s_querydomaininvalid
;
1248 return adns__ckl_hostname(ads
, flags
, cls
, ctx
, labnum
, label
, lablen
);
1251 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1253 /* might be adns_rr_srvraw* */) {
1254 const byte
*dgram
= pai
->dgram
;
1258 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1260 rrp
->priority
= GET_W(cbyte
, ti
);
1261 rrp
->weight
= GET_W(cbyte
, ti
);
1262 rrp
->port
= GET_W(cbyte
, ti
);
1266 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1267 int max
, void *datap
) {
1268 adns_rr_srvraw
*rrp
= datap
;
1271 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1274 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1275 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1278 if (cbyte
!= max
) return adns_s_invaliddata
;
1282 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1283 int max
, void *datap
) {
1284 adns_rr_srvha
*rrp
= datap
;
1287 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1288 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1289 if (cbyte
!= max
) return adns_s_invaliddata
;
1293 static void mf_srvraw(adns_query qu
, void *datap
) {
1294 adns_rr_srvraw
*rrp
= datap
;
1295 adns__makefinal_str(qu
, &rrp
->host
);
1298 static void mf_srvha(adns_query qu
, void *datap
) {
1299 adns_rr_srvha
*rrp
= datap
;
1300 mfp_hostaddr(qu
,&rrp
->ha
);
1303 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1304 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1305 /* might be const adns_rr_svhostaddr* */
1307 if (ap
->priority
< bp
->priority
) return 0;
1308 if (ap
->priority
> bp
->priority
) return 1;
1312 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1313 /* might be adns_rr_srvraw* */) {
1315 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1320 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1321 const adns_rr_srvraw
*rrp
= datap
;
1324 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1325 return csp_domain(vb
,rrp
->host
);
1328 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1329 const adns_rr_srvha
*rrp
= datap
;
1332 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1333 return csp_hostaddr(vb
,&rrp
->ha
);
1336 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,int rrsz
,
1337 const struct typeinfo
*typei
) {
1338 /* we treat everything in the array as if it were an adns_rr_srvha
1339 * even though the array might be of adns_rr_srvraw. That's OK
1340 * because they have the same prefix, which is all we access.
1341 * We use rrsz, too, rather than naive array indexing, of course.
1343 char *workbegin
, *workend
, *search
, *arrayend
;
1344 const adns_rr_srvha
*rr
;
1345 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1346 int cpriority
, totalweight
, runtotal
;
1349 assert(rrsz
<= sizeof(rrtmp
));
1350 for (workbegin
= array
, arrayend
= workbegin
+ rrsz
* nrrs
;
1351 workbegin
< arrayend
;
1352 workbegin
= workend
) {
1353 cpriority
= (rr
=(void*)workbegin
)->priority
;
1355 for (workend
= workbegin
, totalweight
= 0;
1356 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1358 totalweight
+= rr
->weight
;
1361 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1362 * cpriority. From now on, workbegin points to the `remaining'
1363 * records: we select one record at a time (RFC2782 `Usage rules'
1364 * and `Format of the SRV RR' subsection `Weight') to place at
1365 * workbegin (swapping with the one that was there, and then
1366 * advance workbegin. */
1368 workbegin
+ rrsz
< workend
; /* don't bother if just one */
1369 workbegin
+= rrsz
) {
1371 randval
= nrand48(ads
->rand48xsubi
);
1372 randval
%= (totalweight
+ 1);
1373 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1374 * totalweight must be <= 2^26 so probability nonuniformity is
1375 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1376 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1379 for (search
=workbegin
, runtotal
=0;
1380 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1382 assert(search
< arrayend
);
1383 totalweight
-= rr
->weight
;
1384 if (search
!= workbegin
) {
1385 memcpy(&rrtmp
, workbegin
, rrsz
);
1386 memcpy(workbegin
, search
, rrsz
);
1387 memcpy(search
, &rrtmp
, rrsz
);
1392 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1393 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1394 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1402 static void mf_byteblock(adns_query qu
, void *datap
) {
1403 adns_rr_byteblock
*rrp
= datap
;
1404 void *bytes
= rrp
->data
;
1405 adns__makefinal_block(qu
,&bytes
,rrp
->len
);
1413 static adns_status
pa_opaque(const parseinfo
*pai
, int cbyte
,
1414 int max
, void *datap
) {
1415 adns_rr_byteblock
*rrp
= datap
;
1417 rrp
->len
= max
- cbyte
;
1418 rrp
->data
= adns__alloc_interim(pai
->qu
, rrp
->len
);
1419 if (!rrp
->data
) R_NOMEM
;
1420 memcpy(rrp
->data
, pai
->dgram
+ cbyte
, rrp
->len
);
1424 static adns_status
cs_opaque(vbuf
*vb
, const void *datap
) {
1425 const adns_rr_byteblock
*rrp
= datap
;
1430 sprintf(buf
,"\\# %d",rrp
->len
);
1433 for (l
= rrp
->len
, p
= rrp
->data
;
1436 sprintf(buf
," %02x%02x%02x%02x",p
[0],p
[1],p
[2],p
[3]);
1442 sprintf(buf
," %02x",*p
);
1452 static void mf_flat(adns_query qu
, void *data
) { }
1458 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1460 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1461 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1462 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1463 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1465 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1466 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1467 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1468 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1473 static const typeinfo typeinfos
[] = {
1474 /* Must be in ascending order of rrtype ! */
1475 /* mem-mgmt code rrt fmt member parser comparer printer */
1477 FLAT_TYPE(a
, "A", 0, inaddr
, inaddr
, inaddr
,inaddr
),
1478 DEEP_TYPE(ns_raw
, "NS", "raw",str
, host_raw
,0, domain
),
1479 DEEP_TYPE(cname
, "CNAME", 0, str
, dom_raw
, 0, domain
),
1480 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, soa
, 0, soa
),
1481 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, host_raw
,0, domain
),
1482 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,hinfo
, 0, hinfo
),
1483 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, mx_raw
, mx_raw
,inthost
),
1484 DEEP_TYPE(txt
, "TXT", 0, manyistr
, txt
, 0, txt
),
1485 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, rp
, 0, rp
),
1486 FLAT_TYPE(aaaa
, "AAAA", 0, in6addr
, in6addr
, in6addr
,in6addr
),
1487 DEEP_TYPE(srv_raw
,"SRV", "raw",srvraw
, srvraw
, srv
, srvraw
,
1488 .checklabel
= ckl_srv
, .postsort
= postsort_srv
),
1490 FLAT_TYPE(addr
, "A", "addr", addr
, addr
, addr
, addr
,
1491 .getrrsz
= gsz_addr
, .query_send
= qs_addr
),
1492 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
, hostaddr
,hostaddr
,hostaddr
),
1493 DEEP_TYPE(ptr
, "PTR","checked",str
, ptr
, 0, domain
,
1494 .checklabel
= ckl_ptr
),
1495 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,mx
, mx
, inthostaddr
, ),
1496 DEEP_TYPE(srv
, "SRV","+addr",srvha
, srvha
, srv
, srvha
,
1497 .checklabel
= ckl_srv
, .postsort
= postsort_srv
),
1499 DEEP_TYPE(soa
, "SOA","822", soa
, soa
, 0, soa
),
1500 DEEP_TYPE(rp
, "RP", "822", strpair
, rp
, 0, rp
),
1503 static const typeinfo tinfo_addrsub
=
1504 FLAT_TYPE(none
, "<addr>","sub",addr
, addr
, 0, addr
,
1505 .getrrsz
= gsz_addr
);
1507 static const typeinfo typeinfo_unknown
=
1508 DEEP_TYPE(unknown
,0, "unknown",byteblock
,opaque
, 0, opaque
);
1510 const typeinfo
*adns__findtype(adns_rrtype type
) {
1511 const typeinfo
*begin
, *end
, *mid
;
1513 if (type
& adns_r_unknown
) return &typeinfo_unknown
;
1514 type
&= adns_rrt_reprmask
;
1516 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1518 while (begin
< end
) {
1519 mid
= begin
+ ((end
-begin
)>>1);
1520 if (mid
->typekey
== type
) return mid
;
1521 if (type
> mid
->typekey
) begin
= mid
+1;