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_sortlst_sa, dip_sockaddr,
56 * addr_rrtypes, 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
;
266 const struct in6_addr
*a6
;
271 if (af
== AF_INET6
) {
273 if (IN6_IS_ADDR_V4MAPPED(a6
)) {
274 a
.v4
.s_addr
= htonl(((unsigned long)a6
->s6_addr
[12] << 24) |
275 ((unsigned long)a6
->s6_addr
[13] << 16) |
276 ((unsigned long)a6
->s6_addr
[14] << 8) |
277 ((unsigned long)a6
->s6_addr
[15] << 0));
282 for (i
=0, slp
=ads
->sortlist
;
284 !adns__addr_match_p(af
,ad
, slp
->af
,&slp
->base
,&slp
->mask
) &&
286 adns__addr_match_p(AF_INET
,&a
, slp
->af
,&slp
->base
,&slp
->mask
));
291 static int dip_genaddr(adns_state ads
, int af
, const void *a
, const void *b
) {
294 if (!ads
->nsortlist
) return 0;
296 ai
= search_sortlist(ads
,af
,a
);
297 bi
= search_sortlist(ads
,af
,b
);
301 static int di_inaddr(adns_state ads
,
302 const void *datap_a
, const void *datap_b
) {
303 return dip_genaddr(ads
,AF_INET
,datap_a
,datap_b
);
306 static adns_status
csp_genaddr(vbuf
*vb
, int af
, const void *p
) {
307 char buf
[ADNS_ADDR2TEXT_BUFLEN
];
308 int len
= sizeof(buf
);
312 memset(&a
, 0, sizeof(a
));
313 a
.addr
.sa
.sa_family
= af
;
314 adns__sockaddr_inject(p
, 0, &a
.addr
.sa
);
315 err
= adns_addr2text(&a
.addr
.sa
,0, buf
,&len
, 0); assert(!err
);
320 static adns_status
cs_inaddr(vbuf
*vb
, const void *datap
) {
321 return csp_genaddr(vb
, AF_INET
,datap
);
325 * _in6addr (pa,di,cs)
328 static adns_status
pa_in6addr(const parseinfo
*pai
, int cbyte
,
329 int max
, void *datap
) {
330 struct in6_addr
*storeto
= datap
;
332 if (max
-cbyte
!= 16) return adns_s_invaliddata
;
333 memcpy(storeto
->s6_addr
, pai
->dgram
+ cbyte
, 16);
337 static int di_in6addr(adns_state ads
,
338 const void *datap_a
, const void *datap_b
) {
339 return dip_genaddr(ads
,AF_INET6
,datap_a
,datap_b
);
342 static adns_status
cs_in6addr(vbuf
*vb
, const void *datap
) {
343 return csp_genaddr(vb
,AF_INET6
,datap
);
347 * _addr (pap,pa,di,div,csp,cs,gsz,qs
348 * +search_sortlist_sa, dip_sockaddr, addr_rrtypes, icb_addr)
351 static const typeinfo tinfo_addrsub
;
353 #define ADDR_RRTYPES(_) _(a)
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 static adns_status
pap_addr(const parseinfo
*pai
, int rrty
, size_t rrsz
,
381 int *cbyte_io
, int max
, adns_rr_addr
*storeto
) {
382 const byte
*dgram
= pai
->dgram
;
383 int af
, addrlen
, salen
;
384 const void *oaddr
= dgram
+ *cbyte_io
;
385 int avail
= max
- *cbyte_io
;
391 af
= AF_INET
; addrlen
= 4;
392 addrp
= &storeto
->addr
.inet
.sin_addr
;
393 salen
= sizeof(storeto
->addr
.inet
);
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
);
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 adns__sockaddr_extract(sa
, &a
, 0);
422 return search_sortlist(ads
, sa
->sa_family
, &a
);
425 static int dip_sockaddr(adns_state ads
,
426 const struct sockaddr
*sa
,
427 const struct sockaddr
*sb
) {
428 if (!ads
->sortlist
) return 0;
429 return search_sortlist_sa(ads
, sa
) > search_sortlist_sa(ads
, sb
);
432 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
433 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
434 return dip_sockaddr(ads
, &ap
->addr
.sa
, &bp
->addr
.sa
);
437 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
438 const adns_state ads
= context
;
440 return di_addr(ads
, datap_a
, datap_b
);
443 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
444 char buf
[ADNS_ADDR2TEXT_BUFLEN
];
445 int len
= sizeof(buf
);
448 switch (rrp
->addr
.inet
.sin_family
) {
453 CSP_ADDSTR("INET6 ");
456 err
= adns_addr2text(&rrp
->addr
.sa
,0, buf
,&len
, 0); assert(!err
);
460 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
467 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
468 const adns_rr_addr
*rrp
= datap
;
470 return csp_addr(vb
,rrp
);
473 static int gsz_addr(const typeinfo
*typei
, adns_rrtype type
) {
474 return type
& adns__qtf_bigaddr ?
475 sizeof(adns_rr_addr
) : sizeof(adns_rr_addr_v4only
);
478 static unsigned addr_rrtypes(adns_state ads
, adns_rrtype type
,
479 adns_queryflags qf
) {
480 /* Return a mask of addr_rf_... flags indicating which address families are
481 * wanted, given a query type and flags.
486 static void icb_addr(adns_query parent
, adns_query child
);
488 static void addr_subqueries(adns_query qu
, struct timeval now
,
489 adns_queryflags qf_extra
,
490 const byte
*qd_dgram
, int qd_dglen
) {
493 adns_queryflags qf
= (qu
->flags
& ~adns_qf_search
) | qf_extra
;
494 adns_rrtype qtf
= qu
->answer
->type
& adns__qtf_deref
;
495 unsigned which
= qu
->ctx
.tinfo
.addr
.want
& ~qu
->ctx
.tinfo
.addr
.have
;
498 memset(&ctx
, 0, sizeof(ctx
));
499 ctx
.callback
= icb_addr
;
500 for (i
=0; i
<addr_nrrtypes
; i
++) {
501 if (!(which
& (1 << i
))) continue;
502 err
= adns__mkquery_frdgram(qu
->ads
, &qu
->vb
, &id
, qd_dgram
,qd_dglen
,
503 DNS_HDRSIZE
, addr_all_rrtypes
[i
], qf
);
504 if (err
) goto x_error
;
505 err
= adns__internal_submit(qu
->ads
, &cqu
, qu
, &tinfo_addrsub
,
506 addr_all_rrtypes
[i
] | qtf
,
507 &qu
->vb
, id
, qf
, now
, &ctx
);
508 if (err
) goto x_error
;
509 cqu
->answer
->rrsz
= qu
->answer
->rrsz
;
511 qu
->state
= query_childw
;
512 LIST_LINK_TAIL(qu
->ads
->childw
, qu
);
516 adns__query_fail(qu
, err
);
519 static adns_status
append_addrs(adns_query qu
, size_t rrsz
,
520 adns_rr_addr
**dp
, int *dlen
,
521 const adns_rr_addr
*sp
, int slen
) {
522 /* Append a vector of slen addr records, each of size rrsz, starting at ap,
523 * to a vector starting at *dp, of length *dlen. On successful completion,
524 * *dp and *dlen are updated.
527 size_t drrsz
= *dlen
*rrsz
, srrsz
= slen
*rrsz
;
530 if (!slen
) return adns_s_ok
;
531 p
= adns__alloc_interim(qu
, drrsz
+ srrsz
);
534 memcpy(p
, *dp
, drrsz
);
535 adns__free_interim(qu
, *dp
);
537 memcpy(p
+ drrsz
, sp
, srrsz
);
539 *dp
= (adns_rr_addr
*)p
;
543 static void propagate_ttl(adns_query to
, adns_query from
)
544 { if (to
->expires
> from
->expires
) to
->expires
= from
->expires
; }
546 static adns_status
copy_cname_from_child(adns_query parent
, adns_query child
) {
547 adns_answer
*pans
= parent
->answer
, *cans
= child
->answer
;
548 size_t n
= strlen(cans
->cname
) + 1;
550 pans
->cname
= adns__alloc_preserved(parent
, n
);
551 if (!pans
->cname
) R_NOMEM
;
552 memcpy(pans
->cname
, cans
->cname
, n
);
556 static void done_addr_type(adns_query qu
, adns_rrtype type
) {
557 unsigned f
= addr_rrtypeflag(type
);
558 assert(f
); qu
->ctx
.tinfo
.addr
.have
|= f
;
561 static void icb_addr(adns_query parent
, adns_query child
) {
562 adns_state ads
= parent
->ads
;
563 adns_answer
*pans
= parent
->answer
, *cans
= child
->answer
;
567 propagate_ttl(parent
, child
);
569 if (cans
->cname
&& !pans
->cname
) {
570 err
= copy_cname_from_child(parent
, child
);
574 if ((parent
->flags
& adns_qf_search
) &&
575 !pans
->cname
&& cans
->status
== adns_s_nxdomain
) {
576 /* We're searching a list of suffixes, and the name doesn't exist. Try
580 adns__cancel_children(parent
);
581 adns__free_interim(parent
, pans
->rrs
.bytes
);
582 pans
->rrs
.bytes
= 0; pans
->nrrs
= 0;
583 if (gettimeofday(&now
, 0)) goto x_gtod
;
584 adns__search_next(ads
, parent
, now
);
588 if (cans
->status
&& cans
->status
!= adns_s_nodata
)
589 { err
= cans
->status
; goto x_err
; }
591 assert(pans
->rrsz
== cans
->rrsz
);
592 err
= append_addrs(parent
, pans
->rrsz
,
593 &pans
->rrs
.addr
, &pans
->nrrs
,
594 cans
->rrs
.addr
, cans
->nrrs
);
596 done_addr_type(parent
, cans
->type
);
598 if (parent
->children
.head
) LIST_LINK_TAIL(ads
->childw
, parent
);
599 else if (!pans
->nrrs
) adns__query_fail(parent
, adns_s_nodata
);
600 else adns__query_done(parent
);
604 adns__diag(ads
, -1, parent
, "gettimeofday failed: %s", strerror(errno
));
605 err
= adns_s_systemfail
;
609 adns__query_fail(parent
, err
);
612 static void qs_addr(adns_query qu
, struct timeval now
) {
613 if (!qu
->ctx
.tinfo
.addr
.want
) {
614 qu
->ctx
.tinfo
.addr
.want
= addr_rrtypes(qu
->ads
, qu
->answer
->type
,
616 qu
->ctx
.tinfo
.addr
.have
= 0;
618 addr_subqueries(qu
, now
, 0, qu
->query_dgram
, qu
->query_dglen
);
622 * _domain (pap,csp,cs)
626 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
627 char **domain_r
, parsedomain_flags flags
) {
631 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
632 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
634 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
636 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
639 dm
[pai
->qu
->vb
.used
]= 0;
640 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
646 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
648 if (!*domain
) CSP_ADDSTR(".");
652 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
653 const char *const *domainp
= datap
;
654 return csp_domain(vb
,*domainp
);
657 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
658 int max
, void *datap
) {
662 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
665 if (cbyte
!= max
) return adns_s_invaliddata
;
673 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
674 int max
, void *datap
) {
678 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
679 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
682 if (cbyte
!= max
) return adns_s_invaliddata
;
687 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
690 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
692 int *cbyte_io
, int count
, int dmstart
) {
694 int type
, class, rdlen
, rdstart
, rdend
, ownermatched
;
698 for (rri
=0, naddrs
=-1; rri
<count
; rri
++) {
699 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
700 pai
->dglen
, cbyte_io
,
701 &type
, &class, &ttl
, &rdlen
, &rdstart
,
702 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
704 if (!ownermatched
|| class != DNS_CLASS_IN
|| type
!= adns_r_a
) {
705 if (naddrs
>0) break; else continue;
710 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*addrsz
))
712 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
713 rdend
= rdstart
+ rdlen
;
714 st
= pap_addr(pai
, adns_r_a
, addrsz
, &rdstart
, rdend
,
715 (adns_rr_addr
*)(pai
->qu
->vb
.buf
+ naddrs
*addrsz
));
717 if (rdstart
!= rdend
) return adns_s_invaliddata
;
721 ha
->addrs
= adns__alloc_interim(pai
->qu
, naddrs
*addrsz
);
722 if (!ha
->addrs
) R_NOMEM
;
723 memcpy(ha
->addrs
, pai
->qu
->vb
.buf
, naddrs
*addrsz
);
725 ha
->astatus
= adns_s_ok
;
727 adns__isort(ha
->addrs
, naddrs
, addrsz
, pai
->qu
->vb
.buf
,
733 static void icb_hostaddr(adns_query parent
, adns_query child
) {
734 adns_answer
*cans
= child
->answer
;
735 adns_rr_hostaddr
*rrp
= child
->ctx
.pinfo
.hostaddr
;
736 adns_state ads
= parent
->ads
;
741 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : cans
->nrrs
;
742 rrp
->addrs
= cans
->rrs
.addr
;
743 adns__transfer_interim(child
, parent
, rrp
->addrs
);
745 if (parent
->children
.head
) {
746 LIST_LINK_TAIL(ads
->childw
,parent
);
748 adns__query_done(parent
);
752 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
753 int max
, adns_rr_hostaddr
*rrp
) {
759 adns_queryflags nflags
;
760 size_t addrsz
= gsz_addr(0, pai
->qu
->answer
->type
);
762 dmstart
= cbyte
= *cbyte_io
;
763 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
764 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
768 rrp
->astatus
= adns_s_ok
;
774 st
= pap_findaddrs(pai
, rrp
,addrsz
, &cbyte
, pai
->nscount
, dmstart
);
776 if (rrp
->naddrs
!= -1) return adns_s_ok
;
778 st
= pap_findaddrs(pai
, rrp
,addrsz
, &cbyte
, pai
->arcount
, dmstart
);
780 if (rrp
->naddrs
!= -1) return adns_s_ok
;
782 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
783 pai
->dgram
, pai
->dglen
, dmstart
,
784 adns_r_addr
, adns_qf_quoteok_query
);
788 ctx
.callback
= icb_hostaddr
;
789 ctx
.pinfo
.hostaddr
= rrp
;
790 memset(&ctx
.tinfo
, 0, sizeof(ctx
.tinfo
));
792 nflags
= adns_qf_quoteok_query
;
793 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
795 st
= adns__internal_submit(pai
->ads
, &nqu
, pai
->qu
,
796 adns__findtype(adns_r_addr
),
797 ((adns_r_addr
& adns_rrt_reprmask
) |
798 (pai
->qu
->answer
->type
& ~adns_rrt_reprmask
)),
799 &pai
->qu
->vb
, id
, nflags
, pai
->now
, &ctx
);
805 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
806 int max
, void *datap
) {
807 adns_rr_hostaddr
*rrp
= datap
;
810 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
812 if (cbyte
!= max
) return adns_s_invaliddata
;
817 static int dip_hostaddr(adns_state ads
,
818 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
819 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
820 if (ap
->astatus
) return 0;
822 return dip_sockaddr(ads
, &ap
->addrs
[0].addr
.sa
, &bp
->addrs
[0].addr
.sa
);
825 static int di_hostaddr(adns_state ads
,
826 const void *datap_a
, const void *datap_b
) {
827 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
829 return dip_hostaddr(ads
, ap
,bp
);
832 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
834 size_t addrsz
= gsz_addr(0, qu
->answer
->type
);
836 adns__makefinal_str(qu
,&rrp
->host
);
838 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*addrsz
);
842 static void mf_hostaddr(adns_query qu
, void *datap
) {
843 adns_rr_hostaddr
*rrp
= datap
;
845 mfp_hostaddr(qu
,rrp
);
848 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
854 st
= csp_domain(vb
,rrp
->host
); if (st
) return st
;
857 CSP_ADDSTR(adns_errtypeabbrev(rrp
->astatus
));
859 sprintf(buf
," %d ",rrp
->astatus
);
862 CSP_ADDSTR(adns_errabbrev(rrp
->astatus
));
865 errstr
= adns_strerror(rrp
->astatus
);
866 st
= csp_qstring(vb
,errstr
,strlen(errstr
)); if (st
) return st
;
868 if (rrp
->naddrs
>= 0) {
870 for (i
=0; i
<rrp
->naddrs
; i
++) {
872 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
881 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
882 const adns_rr_hostaddr
*rrp
= datap
;
884 return csp_hostaddr(vb
,rrp
);
891 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
,
892 int max
, void *datap
) {
893 const byte
*dgram
= pai
->dgram
;
894 adns_rr_intstr
*rrp
= datap
;
898 if (cbyte
+2 > max
) return adns_s_invaliddata
;
901 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
902 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
905 if (cbyte
!= max
) return adns_s_invaliddata
;
909 static int di_mx_raw(adns_state ads
, const void *datap_a
, const void *datap_b
) {
910 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
912 if (ap
->i
< bp
->i
) return 0;
913 if (ap
->i
> bp
->i
) return 1;
921 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
,
922 int max
, void *datap
) {
923 const byte
*dgram
= pai
->dgram
;
924 adns_rr_inthostaddr
*rrp
= datap
;
928 if (cbyte
+2 > max
) return adns_s_invaliddata
;
931 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
934 if (cbyte
!= max
) return adns_s_invaliddata
;
938 static int di_mx(adns_state ads
, const void *datap_a
, const void *datap_b
) {
939 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
941 if (ap
->i
< bp
->i
) return 0;
942 if (ap
->i
> bp
->i
) return 1;
943 return dip_hostaddr(ads
, &ap
->ha
, &bp
->ha
);
947 * _inthostaddr (mf,cs)
950 static void mf_inthostaddr(adns_query qu
, void *datap
) {
951 adns_rr_inthostaddr
*rrp
= datap
;
953 mfp_hostaddr(qu
,&rrp
->ha
);
956 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
957 const adns_rr_inthostaddr
*rrp
= datap
;
960 sprintf(buf
,"%u ",rrp
->i
);
963 return csp_hostaddr(vb
,&rrp
->ha
);
970 static adns_status
cs_inthost(vbuf
*vb
, const void *datap
) {
971 const adns_rr_intstr
*rrp
= datap
;
974 sprintf(buf
,"%u ",rrp
->i
);
976 return csp_domain(vb
,rrp
->str
);
980 * _ptr (ckl,pa +icb_ptr)
983 static adns_status
ckl_ptr(adns_state ads
, adns_queryflags flags
,
984 union checklabel_state
*cls
, qcontext
*ctx
,
985 int labnum
, const char *label
, int lablen
) {
987 if (adns__revparse_label(&cls
->ptr
, labnum
, label
,lablen
))
988 return adns_s_querydomainwrong
;
990 if (adns__revparse_done(&cls
->ptr
, labnum
,
991 &ctx
->tinfo
.ptr
.rev_rrtype
,
992 &ctx
->tinfo
.ptr
.addr
))
993 return adns_s_querydomainwrong
;
998 static void icb_ptr(adns_query parent
, adns_query child
) {
999 adns_answer
*cans
= child
->answer
;
1000 const struct af_addr
*queried
;
1001 const unsigned char *found
;
1002 adns_state ads
= parent
->ads
;
1005 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
1006 adns__query_fail(parent
,adns_s_inconsistent
);
1008 } else if (cans
->status
) {
1009 adns__query_fail(parent
,cans
->status
);
1013 queried
= &parent
->ctx
.tinfo
.ptr
.addr
;
1014 for (i
=0, found
=cans
->rrs
.bytes
; i
<cans
->nrrs
; i
++, found
+=cans
->rrsz
) {
1015 if (adns__genaddr_equal_p(queried
->af
,&queried
->addr
,
1016 parent
->ctx
.tinfo
.ptr
.addr
.af
,found
)) {
1017 if (!parent
->children
.head
) {
1018 adns__query_done(parent
);
1021 LIST_LINK_TAIL(ads
->childw
,parent
);
1027 adns__query_fail(parent
,adns_s_inconsistent
);
1030 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
1031 int max
, void *datap
) {
1034 adns_rrtype rrtype
= pai
->qu
->ctx
.tinfo
.ptr
.rev_rrtype
;
1040 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
1041 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1043 if (cbyte
!= max
) return adns_s_invaliddata
;
1045 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
1046 pai
->dgram
, pai
->dglen
, dmstart
,
1047 rrtype
, adns_qf_quoteok_query
);
1051 ctx
.callback
= icb_ptr
;
1052 memset(&ctx
.pinfo
,0,sizeof(ctx
.pinfo
));
1053 memset(&ctx
.tinfo
,0,sizeof(ctx
.tinfo
));
1054 st
= adns__internal_submit(pai
->ads
, &nqu
, pai
->qu
,
1055 adns__findtype(rrtype
),
1056 rrtype
, &pai
->qu
->vb
, id
,
1057 adns_qf_quoteok_query
, pai
->now
, &ctx
);
1067 static void mf_strpair(adns_query qu
, void *datap
) {
1068 adns_rr_strpair
*rrp
= datap
;
1070 adns__makefinal_str(qu
,&rrp
->array
[0]);
1071 adns__makefinal_str(qu
,&rrp
->array
[1]);
1078 static void mf_intstrpair(adns_query qu
, void *datap
) {
1079 adns_rr_intstrpair
*rrp
= datap
;
1081 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
1082 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
1089 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
1090 int max
, void *datap
) {
1091 adns_rr_intstrpair
*rrp
= datap
;
1095 for (i
=0; i
<2; i
++) {
1096 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
1100 if (cbyte
!= max
) return adns_s_invaliddata
;
1106 * _mailbox (pap,cs +pap_mailbox822)
1109 static adns_status
pap_mailbox822(const parseinfo
*pai
,
1110 int *cbyte_io
, int max
, char **mb_r
) {
1111 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
1112 const unsigned char *p
;
1114 findlabel_state fls
;
1120 adns__findlabel_start(&fls
, pai
->ads
,
1122 pai
->dgram
, pai
->dglen
, max
,
1123 *cbyte_io
, cbyte_io
);
1124 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
1126 adns__vbuf_appendstr(vb
,".");
1131 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
1133 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
1134 if (c
== '.' && !neednorm
) neednorm
= 1;
1135 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
1139 if (needquote
|| neednorm
) {
1140 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
1141 adns__vbuf_appendq(vb
,"\"",1);
1142 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
1144 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
1145 adns__vbuf_appendq(vb
,p
,1);
1147 adns__vbuf_appendq(vb
,"\"",1);
1149 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
1152 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
1154 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
1158 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
1159 memcpy(str
,vb
->buf
,vb
->used
);
1165 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
1167 if (pai
->qu
->typei
->typekey
& adns__qtf_mail822
) {
1168 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
1170 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
1174 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
1175 return csp_domain(vb
,mailbox
);
1182 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
1183 int max
, void *datap
) {
1184 adns_rr_strpair
*rrp
= datap
;
1187 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
1190 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
1193 if (cbyte
!= max
) return adns_s_invaliddata
;
1197 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
1198 const adns_rr_strpair
*rrp
= datap
;
1201 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
1203 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
1212 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
1213 int max
, void *datap
) {
1214 adns_rr_soa
*rrp
= datap
;
1215 const byte
*dgram
= pai
->dgram
;
1219 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
1220 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1223 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
1226 if (cbyte
+20 != max
) return adns_s_invaliddata
;
1228 for (i
=0; i
<5; i
++) {
1231 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
1237 static void mf_soa(adns_query qu
, void *datap
) {
1238 adns_rr_soa
*rrp
= datap
;
1240 adns__makefinal_str(qu
,&rrp
->mname
);
1241 adns__makefinal_str(qu
,&rrp
->rname
);
1244 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
1245 const adns_rr_soa
*rrp
= datap
;
1250 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
1252 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
1254 for (i
=0; i
<5; i
++) {
1255 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1263 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
1266 static adns_status
ckl_srv(adns_state ads
, adns_queryflags flags
,
1267 union checklabel_state
*cls
, qcontext
*ctx
,
1268 int labnum
, const char *label
, int lablen
) {
1269 if (labnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1270 if (!lablen
|| label
[0] != '_') return adns_s_querydomaininvalid
;
1273 return adns__ckl_hostname(ads
, flags
, cls
, ctx
, labnum
, label
, lablen
);
1276 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1278 /* might be adns_rr_srvraw* */) {
1279 const byte
*dgram
= pai
->dgram
;
1283 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1285 rrp
->priority
= GET_W(cbyte
, ti
);
1286 rrp
->weight
= GET_W(cbyte
, ti
);
1287 rrp
->port
= GET_W(cbyte
, ti
);
1291 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1292 int max
, void *datap
) {
1293 adns_rr_srvraw
*rrp
= datap
;
1296 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1299 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1300 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1303 if (cbyte
!= max
) return adns_s_invaliddata
;
1307 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1308 int max
, void *datap
) {
1309 adns_rr_srvha
*rrp
= datap
;
1312 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1313 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1314 if (cbyte
!= max
) return adns_s_invaliddata
;
1318 static void mf_srvraw(adns_query qu
, void *datap
) {
1319 adns_rr_srvraw
*rrp
= datap
;
1320 adns__makefinal_str(qu
, &rrp
->host
);
1323 static void mf_srvha(adns_query qu
, void *datap
) {
1324 adns_rr_srvha
*rrp
= datap
;
1325 mfp_hostaddr(qu
,&rrp
->ha
);
1328 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1329 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1330 /* might be const adns_rr_svhostaddr* */
1332 if (ap
->priority
< bp
->priority
) return 0;
1333 if (ap
->priority
> bp
->priority
) return 1;
1337 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1338 /* might be adns_rr_srvraw* */) {
1340 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1345 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1346 const adns_rr_srvraw
*rrp
= datap
;
1349 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1350 return csp_domain(vb
,rrp
->host
);
1353 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1354 const adns_rr_srvha
*rrp
= datap
;
1357 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1358 return csp_hostaddr(vb
,&rrp
->ha
);
1361 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,int rrsz
,
1362 const struct typeinfo
*typei
) {
1363 /* we treat everything in the array as if it were an adns_rr_srvha
1364 * even though the array might be of adns_rr_srvraw. That's OK
1365 * because they have the same prefix, which is all we access.
1366 * We use rrsz, too, rather than naive array indexing, of course.
1368 char *workbegin
, *workend
, *search
, *arrayend
;
1369 const adns_rr_srvha
*rr
;
1370 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1371 int cpriority
, totalweight
, runtotal
;
1374 assert(rrsz
<= sizeof(rrtmp
));
1375 for (workbegin
= array
, arrayend
= workbegin
+ rrsz
* nrrs
;
1376 workbegin
< arrayend
;
1377 workbegin
= workend
) {
1378 cpriority
= (rr
=(void*)workbegin
)->priority
;
1380 for (workend
= workbegin
, totalweight
= 0;
1381 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1383 totalweight
+= rr
->weight
;
1386 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1387 * cpriority. From now on, workbegin points to the `remaining'
1388 * records: we select one record at a time (RFC2782 `Usage rules'
1389 * and `Format of the SRV RR' subsection `Weight') to place at
1390 * workbegin (swapping with the one that was there, and then
1391 * advance workbegin. */
1393 workbegin
+ rrsz
< workend
; /* don't bother if just one */
1394 workbegin
+= rrsz
) {
1396 randval
= nrand48(ads
->rand48xsubi
);
1397 randval
%= (totalweight
+ 1);
1398 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1399 * totalweight must be <= 2^26 so probability nonuniformity is
1400 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1401 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1404 for (search
=workbegin
, runtotal
=0;
1405 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1407 assert(search
< arrayend
);
1408 totalweight
-= rr
->weight
;
1409 if (search
!= workbegin
) {
1410 memcpy(&rrtmp
, workbegin
, rrsz
);
1411 memcpy(workbegin
, search
, rrsz
);
1412 memcpy(search
, &rrtmp
, rrsz
);
1417 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1418 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1419 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1427 static void mf_byteblock(adns_query qu
, void *datap
) {
1428 adns_rr_byteblock
*rrp
= datap
;
1429 void *bytes
= rrp
->data
;
1430 adns__makefinal_block(qu
,&bytes
,rrp
->len
);
1438 static adns_status
pa_opaque(const parseinfo
*pai
, int cbyte
,
1439 int max
, void *datap
) {
1440 adns_rr_byteblock
*rrp
= datap
;
1442 rrp
->len
= max
- cbyte
;
1443 rrp
->data
= adns__alloc_interim(pai
->qu
, rrp
->len
);
1444 if (!rrp
->data
) R_NOMEM
;
1445 memcpy(rrp
->data
, pai
->dgram
+ cbyte
, rrp
->len
);
1449 static adns_status
cs_opaque(vbuf
*vb
, const void *datap
) {
1450 const adns_rr_byteblock
*rrp
= datap
;
1455 sprintf(buf
,"\\# %d",rrp
->len
);
1458 for (l
= rrp
->len
, p
= rrp
->data
;
1461 sprintf(buf
," %02x%02x%02x%02x",p
[0],p
[1],p
[2],p
[3]);
1467 sprintf(buf
," %02x",*p
);
1477 static void mf_flat(adns_query qu
, void *data
) { }
1483 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1485 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1486 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1487 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1488 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1490 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1491 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1492 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1493 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1498 static const typeinfo typeinfos
[] = {
1499 /* Must be in ascending order of rrtype ! */
1500 /* mem-mgmt code rrt fmt member parser comparer printer */
1502 FLAT_TYPE(a
, "A", 0, inaddr
, inaddr
, inaddr
,inaddr
),
1503 DEEP_TYPE(ns_raw
, "NS", "raw",str
, host_raw
,0, domain
),
1504 DEEP_TYPE(cname
, "CNAME", 0, str
, dom_raw
, 0, domain
),
1505 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, soa
, 0, soa
),
1506 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, host_raw
,0, domain
),
1507 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,hinfo
, 0, hinfo
),
1508 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, mx_raw
, mx_raw
,inthost
),
1509 DEEP_TYPE(txt
, "TXT", 0, manyistr
, txt
, 0, txt
),
1510 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, rp
, 0, rp
),
1511 FLAT_TYPE(aaaa
, "AAAA", 0, in6addr
, in6addr
, in6addr
,in6addr
),
1512 DEEP_TYPE(srv_raw
,"SRV", "raw",srvraw
, srvraw
, srv
, srvraw
,
1513 .checklabel
= ckl_srv
, .postsort
= postsort_srv
),
1515 FLAT_TYPE(addr
, "A", "addr", addr
, addr
, addr
, addr
,
1516 .getrrsz
= gsz_addr
, .query_send
= qs_addr
),
1517 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
, hostaddr
,hostaddr
,hostaddr
),
1518 DEEP_TYPE(ptr
, "PTR","checked",str
, ptr
, 0, domain
,
1519 .checklabel
= ckl_ptr
),
1520 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,mx
, mx
, inthostaddr
, ),
1521 DEEP_TYPE(srv
, "SRV","+addr",srvha
, srvha
, srv
, srvha
,
1522 .checklabel
= ckl_srv
, .postsort
= postsort_srv
),
1524 DEEP_TYPE(soa
, "SOA","822", soa
, soa
, 0, soa
),
1525 DEEP_TYPE(rp
, "RP", "822", strpair
, rp
, 0, rp
),
1528 static const typeinfo tinfo_addrsub
=
1529 FLAT_TYPE(none
, "<addr>","sub",addr
, addr
, 0, addr
,
1530 .getrrsz
= gsz_addr
);
1532 static const typeinfo typeinfo_unknown
=
1533 DEEP_TYPE(unknown
,0, "unknown",byteblock
,opaque
, 0, opaque
);
1535 const typeinfo
*adns__findtype(adns_rrtype type
) {
1536 const typeinfo
*begin
, *end
, *mid
;
1538 if (type
& adns_r_unknown
) return &typeinfo_unknown
;
1539 type
&= adns_rrt_reprmask
;
1541 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1543 while (begin
< end
) {
1544 mid
= begin
+ ((end
-begin
)>>1);
1545 if (mid
->typekey
== type
) return mid
;
1546 if (type
> mid
->typekey
) begin
= mid
+1;