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)
50 * _inaddr (pa,cs,di, +search_sortlist, dip_genaddr)
52 * _addr (pa,di,csp,cs, +search_sortlist_sa, dip_sockaddr)
55 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
58 * _inthostaddr (mf,cs)
63 * _mailbox (pap +pap_mailbox822)
66 * _srv* (qdpl,(pap),pa,mf,di,(csp),cs,postsort)
71 * within each section:
88 static adns_status
pap_qstring(const parseinfo
*pai
, int *cbyte_io
, int max
,
89 int *len_r
, char **str_r
) {
90 /* Neither len_r nor str_r may be null.
91 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
93 const byte
*dgram
= pai
->dgram
;
99 if (cbyte
>= max
) return adns_s_invaliddata
;
101 if (cbyte
+l
> max
) return adns_s_invaliddata
;
103 str
= adns__alloc_interim(pai
->qu
, l
+1);
107 memcpy(str
,dgram
+cbyte
,l
);
116 static adns_status
csp_qstring(vbuf
*vb
, const char *dp
, int len
) {
122 for (cn
=0; cn
<len
; cn
++) {
126 } else if (ch
== '"') {
128 } else if (ch
>= 32 && ch
<= 126) {
129 if (!adns__vbuf_append(vb
,&ch
,1)) R_NOMEM
;
131 sprintf(buf
,"\\x%02x",ch
);
144 static void mf_str(adns_query qu
, void *datap
) {
147 adns__makefinal_str(qu
,rrp
);
154 static void mf_intstr(adns_query qu
, void *datap
) {
155 adns_rr_intstr
*rrp
= datap
;
157 adns__makefinal_str(qu
,&rrp
->str
);
164 static void mf_manyistr(adns_query qu
, void *datap
) {
165 adns_rr_intstr
**rrp
= datap
;
166 adns_rr_intstr
*te
, *table
;
170 for (tc
=0, te
= *rrp
; te
->i
>= 0; te
++, tc
++);
172 adns__makefinal_block(qu
,&tablev
,sizeof(*te
)*(tc
+1));
174 for (te
= *rrp
; te
->i
>= 0; te
++)
175 adns__makefinal_str(qu
,&te
->str
);
182 static adns_status
pa_txt(const parseinfo
*pai
, int cbyte
,
183 int max
, void *datap
) {
184 adns_rr_intstr
**rrp
= datap
, *table
, *te
;
185 const byte
*dgram
= pai
->dgram
;
186 int ti
, tc
, l
, startbyte
;
190 if (cbyte
>= max
) return adns_s_invaliddata
;
192 while (cbyte
< max
) {
197 if (cbyte
!= max
|| !tc
) return adns_s_invaliddata
;
199 table
= adns__alloc_interim(pai
->qu
,sizeof(*table
)*(tc
+1));
202 for (cbyte
=startbyte
, ti
=0, te
=table
; ti
<tc
; ti
++, te
++) {
203 st
= pap_qstring(pai
, &cbyte
, max
, &te
->i
, &te
->str
);
206 assert(cbyte
== max
);
215 static adns_status
cs_txt(vbuf
*vb
, const void *datap
) {
216 const adns_rr_intstr
*const *rrp
= datap
;
217 const adns_rr_intstr
*current
;
221 for (current
= *rrp
, spc
=0; current
->i
>= 0; current
++, spc
=1) {
222 if (spc
) CSP_ADDSTR(" ");
223 st
= csp_qstring(vb
,current
->str
,current
->i
); if (st
) return st
;
232 static adns_status
cs_hinfo(vbuf
*vb
, const void *datap
) {
233 const adns_rr_intstrpair
*rrp
= datap
;
236 st
= csp_qstring(vb
,rrp
->array
[0].str
,rrp
->array
[0].i
); if (st
) return st
;
238 st
= csp_qstring(vb
,rrp
->array
[1].str
,rrp
->array
[1].i
); if (st
) return st
;
243 * _inaddr (pa,di,cs +search_sortlist, dip_genaddr)
246 static adns_status
pa_inaddr(const parseinfo
*pai
, int cbyte
,
247 int max
, void *datap
) {
248 struct in_addr
*storeto
= datap
;
250 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
251 memcpy(storeto
, pai
->dgram
+ cbyte
, 4);
255 static int search_sortlist(adns_state ads
, int af
, const void *ad
) {
256 const struct sortlist
*slp
;
257 const struct in6_addr
*a6
;
262 if (af
== AF_INET6
) {
264 if (IN6_IS_ADDR_V4MAPPED(a6
)) {
265 a
.v4
.s_addr
= htonl(((unsigned long)a6
->s6_addr
[12] << 24) |
266 ((unsigned long)a6
->s6_addr
[13] << 16) |
267 ((unsigned long)a6
->s6_addr
[14] << 8) |
268 ((unsigned long)a6
->s6_addr
[15] << 0));
273 for (i
=0, slp
=ads
->sortlist
;
275 !(af
== slp
->ai
->af
&&
276 slp
->ai
->matchp(ad
, &slp
->base
, &slp
->mask
)) &&
277 !(v6mappedp
&& slp
->ai
->af
== AF_INET
&&
278 slp
->ai
->matchp(&a
, &slp
->base
, &slp
->mask
));
283 static int dip_genaddr(adns_state ads
, int af
, const void *a
, const void *b
) {
286 if (!ads
->nsortlist
) return 0;
288 ai
= search_sortlist(ads
,af
,a
);
289 bi
= search_sortlist(ads
,af
,b
);
293 static int di_inaddr(adns_state ads
,
294 const void *datap_a
, const void *datap_b
) {
295 return dip_genaddr(ads
,AF_INET
,datap_a
,datap_b
);
298 static adns_status
cs_inaddr(vbuf
*vb
, const void *datap
) {
299 const struct in_addr
*rrp
= datap
, rr
= *rrp
;
302 ia
= inet_ntoa(rr
); assert(ia
);
308 * _in6addr (pa,di,cs)
311 static adns_status
pa_in6addr(const parseinfo
*pai
, int cbyte
,
312 int max
, void *datap
) {
313 struct in6_addr
*storeto
= datap
;
315 if (max
-cbyte
!= 16) return adns_s_invaliddata
;
316 memcpy(storeto
->s6_addr
, pai
->dgram
+ cbyte
, 16);
320 static int di_in6addr(adns_state ads
,
321 const void *datap_a
, const void *datap_b
) {
322 return dip_genaddr(ads
,AF_INET6
,datap_a
,AF_INET6
,datap_b
);
325 static adns_status
cs_in6addr(vbuf
*vb
, const void *datap
) {
326 char buf
[INET6_ADDRSTRLEN
];
329 ia
= inet_ntop(AF_INET6
, datap
, buf
, sizeof(buf
)); assert(ia
);
335 * _addr (pa,di,csp,cs, +search_sortlist_sa, dip_sockaddr)
338 static adns_status
pa_addr(const parseinfo
*pai
, int cbyte
,
339 int max
, void *datap
) {
340 adns_rr_addr
*storeto
= datap
;
341 const byte
*dgram
= pai
->dgram
;
343 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
344 storeto
->len
= sizeof(storeto
->addr
.inet
);
345 memset(&storeto
->addr
,0,sizeof(storeto
->addr
.inet
));
346 storeto
->addr
.inet
.sin_family
= AF_INET
;
347 memcpy(&storeto
->addr
.inet
.sin_addr
,dgram
+cbyte
,4);
351 static int search_sortlist_sa(adns_state ads
, const struct sockaddr
*sa
)
353 const struct afinfo
*ai
= 0;
355 switch (sa
->sa_family
) {
356 case AF_INET
: ai
= &adns__inet_afinfo
; break;
357 case AF_INET6
: ai
= &adns__inet6_afinfo
; break;
361 return search_sortlist(ads
, sa
->sa_family
, ai
->sockaddr_to_inaddr(sa
));
364 static int dip_sockaddr(adns_state ads
,
365 const struct sockaddr
*sa
,
366 const struct sockaddr
*sb
)
368 if (!ads
->sortlist
) return 0;
369 return search_sortlist_sa(ads
, sa
) > search_sortlist_sa(ads
, sb
);
372 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
373 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
375 return dip_sockaddr(ads
, &ap
->addr
.sa
, &bp
->addr
.sa
);
378 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
379 const adns_state ads
= context
;
381 return di_addr(ads
, datap_a
, datap_b
);
384 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
388 switch (rrp
->addr
.inet
.sin_family
) {
391 ia
= inet_ntoa(rrp
->addr
.inet
.sin_addr
); assert(ia
);
395 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
402 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
403 const adns_rr_addr
*rrp
= datap
;
405 return csp_addr(vb
,rrp
);
409 * _domain (pap,csp,cs)
413 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
414 char **domain_r
, parsedomain_flags flags
) {
418 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
419 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
421 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
423 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
426 dm
[pai
->qu
->vb
.used
]= 0;
427 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
433 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
435 if (!*domain
) CSP_ADDSTR(".");
439 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
440 const char *const *domainp
= datap
;
441 return csp_domain(vb
,*domainp
);
444 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
445 int max
, void *datap
) {
449 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
452 if (cbyte
!= max
) return adns_s_invaliddata
;
460 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
461 int max
, void *datap
) {
465 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
466 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
469 if (cbyte
!= max
) return adns_s_invaliddata
;
474 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
477 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
478 int *cbyte_io
, int count
, int dmstart
) {
480 int type
, class, rdlen
, rdstart
, ownermatched
;
484 for (rri
=0, naddrs
=-1; rri
<count
; rri
++) {
485 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
486 pai
->dglen
, cbyte_io
,
487 &type
, &class, &ttl
, &rdlen
, &rdstart
,
488 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
490 if (!ownermatched
|| class != DNS_CLASS_IN
|| type
!= adns_r_a
) {
491 if (naddrs
>0) break; else continue;
496 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*sizeof(adns_rr_addr
)))
498 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
499 st
= pa_addr(pai
, rdstart
,rdstart
+rdlen
,
500 pai
->qu
->vb
.buf
+ naddrs
*sizeof(adns_rr_addr
));
505 ha
->addrs
= adns__alloc_interim(pai
->qu
, naddrs
*sizeof(adns_rr_addr
));
506 if (!ha
->addrs
) R_NOMEM
;
507 memcpy(ha
->addrs
, pai
->qu
->vb
.buf
, naddrs
*sizeof(adns_rr_addr
));
509 ha
->astatus
= adns_s_ok
;
511 adns__isort(ha
->addrs
, naddrs
, sizeof(adns_rr_addr
), pai
->qu
->vb
.buf
,
517 static void icb_hostaddr(adns_query parent
, adns_query child
) {
518 adns_answer
*cans
= child
->answer
;
519 adns_rr_hostaddr
*rrp
= child
->ctx
.info
.hostaddr
;
520 adns_state ads
= parent
->ads
;
525 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : cans
->nrrs
;
526 rrp
->addrs
= cans
->rrs
.addr
;
527 adns__transfer_interim(child
, parent
, rrp
->addrs
,
528 rrp
->naddrs
*sizeof(adns_rr_addr
));
530 if (parent
->children
.head
) {
531 LIST_LINK_TAIL(ads
->childw
,parent
);
533 adns__query_done(parent
);
537 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
538 int max
, adns_rr_hostaddr
*rrp
) {
544 adns_queryflags nflags
;
546 dmstart
= cbyte
= *cbyte_io
;
547 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
548 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
552 rrp
->astatus
= adns_s_ok
;
558 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->nscount
, dmstart
);
560 if (rrp
->naddrs
!= -1) return adns_s_ok
;
562 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->arcount
, dmstart
);
564 if (rrp
->naddrs
!= -1) return adns_s_ok
;
566 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
567 pai
->dgram
, pai
->dglen
, dmstart
,
568 adns_r_addr
, adns_qf_quoteok_query
);
572 ctx
.callback
= icb_hostaddr
;
573 ctx
.info
.hostaddr
= rrp
;
575 nflags
= adns_qf_quoteok_query
;
576 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
578 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(adns_r_addr
),
579 &pai
->qu
->vb
, id
, nflags
, pai
->now
, &ctx
);
582 nqu
->parent
= pai
->qu
;
583 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
588 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
589 int max
, void *datap
) {
590 adns_rr_hostaddr
*rrp
= datap
;
593 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
595 if (cbyte
!= max
) return adns_s_invaliddata
;
600 static int dip_hostaddr(adns_state ads
,
601 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
602 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
603 if (ap
->astatus
) return 0;
605 return dip_sockaddr(ads
, &ap
->addrs
[0].addr
.sa
, &bp
->addrs
[0].addr
.sa
);
608 static int di_hostaddr(adns_state ads
,
609 const void *datap_a
, const void *datap_b
) {
610 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
612 return dip_hostaddr(ads
, ap
,bp
);
615 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
618 adns__makefinal_str(qu
,&rrp
->host
);
620 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*sizeof(*rrp
->addrs
));
624 static void mf_hostaddr(adns_query qu
, void *datap
) {
625 adns_rr_hostaddr
*rrp
= datap
;
627 mfp_hostaddr(qu
,rrp
);
630 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
636 st
= csp_domain(vb
,rrp
->host
); if (st
) return st
;
639 CSP_ADDSTR(adns_errtypeabbrev(rrp
->astatus
));
641 sprintf(buf
," %d ",rrp
->astatus
);
644 CSP_ADDSTR(adns_errabbrev(rrp
->astatus
));
647 errstr
= adns_strerror(rrp
->astatus
);
648 st
= csp_qstring(vb
,errstr
,strlen(errstr
)); if (st
) return st
;
650 if (rrp
->naddrs
>= 0) {
652 for (i
=0; i
<rrp
->naddrs
; i
++) {
654 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
663 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
664 const adns_rr_hostaddr
*rrp
= datap
;
666 return csp_hostaddr(vb
,rrp
);
673 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
,
674 int max
, void *datap
) {
675 const byte
*dgram
= pai
->dgram
;
676 adns_rr_intstr
*rrp
= datap
;
680 if (cbyte
+2 > max
) return adns_s_invaliddata
;
683 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
684 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
687 if (cbyte
!= max
) return adns_s_invaliddata
;
691 static int di_mx_raw(adns_state ads
, const void *datap_a
, const void *datap_b
) {
692 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
694 if (ap
->i
< bp
->i
) return 0;
695 if (ap
->i
> bp
->i
) return 1;
703 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
,
704 int max
, void *datap
) {
705 const byte
*dgram
= pai
->dgram
;
706 adns_rr_inthostaddr
*rrp
= datap
;
710 if (cbyte
+2 > max
) return adns_s_invaliddata
;
713 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
716 if (cbyte
!= max
) return adns_s_invaliddata
;
720 static int di_mx(adns_state ads
, const void *datap_a
, const void *datap_b
) {
721 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
723 if (ap
->i
< bp
->i
) return 0;
724 if (ap
->i
> bp
->i
) return 1;
725 return dip_hostaddr(ads
, &ap
->ha
, &bp
->ha
);
729 * _inthostaddr (mf,cs)
732 static void mf_inthostaddr(adns_query qu
, void *datap
) {
733 adns_rr_inthostaddr
*rrp
= datap
;
735 mfp_hostaddr(qu
,&rrp
->ha
);
738 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
739 const adns_rr_inthostaddr
*rrp
= datap
;
742 sprintf(buf
,"%u ",rrp
->i
);
745 return csp_hostaddr(vb
,&rrp
->ha
);
752 static adns_status
cs_inthost(vbuf
*vb
, const void *datap
) {
753 const adns_rr_intstr
*rrp
= datap
;
756 sprintf(buf
,"%u ",rrp
->i
);
758 return csp_domain(vb
,rrp
->str
);
762 * _ptr (pa, +icb_ptr)
765 static void icb_ptr(adns_query parent
, adns_query child
) {
766 adns_answer
*cans
= child
->answer
;
767 const union gen_addr
*queried
;
768 const unsigned char *found
;
769 adns_state ads
= parent
->ads
;
772 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
773 adns__query_fail(parent
,adns_s_inconsistent
);
775 } else if (cans
->status
) {
776 adns__query_fail(parent
,cans
->status
);
780 queried
= &parent
->ctx
.info
.ptr_parent_addr
.addr
;
781 for (i
=0, found
=cans
->rrs
.bytes
; i
<cans
->nrrs
; i
++, found
+= cans
->rrsz
) {
782 if (!memcmp(queried
,found
,cans
->rrsz
)) {
783 if (!parent
->children
.head
) {
784 adns__query_done(parent
);
787 LIST_LINK_TAIL(ads
->childw
,parent
);
793 adns__query_fail(parent
,adns_s_inconsistent
);
796 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
797 int max
, void *datap
) {
798 static const struct {
800 const char *const tail
[3];
802 { &adns__inet_afinfo
, { DNS_INADDR_ARPA
, 0 } },
803 { &adns__inet6_afinfo
, { DNS_IP6_ARPA
, 0 } }
805 enum { n_ed
= sizeof(expectdomain
)/sizeof(expectdomain
[0]) };
809 struct afinfo_addr
*ap
;
812 int cbyte
, i
, j
, foundj
= -1, lablen
, labstart
, id
, f
, ac
;
818 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
819 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
821 if (cbyte
!= max
) return adns_s_invaliddata
;
823 ap
= &pai
->qu
->ctx
.info
.ptr_parent_addr
;
825 adns__findlabel_start(&fls
, pai
->ads
, -1, pai
->qu
,
826 pai
->qu
->query_dgram
, pai
->qu
->query_dglen
,
827 pai
->qu
->query_dglen
, DNS_HDRSIZE
, 0);
829 f
= (1 << n_ed
) - 1; /* superposition of address types */
831 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
); assert(!st
);
832 if (lablen
<= 0) break;
833 for (j
= 0; j
< n_ed
; j
++) {
834 if (!(f
& (1 << j
))) continue;
835 if (i
< expectdomain
[j
].ai
->nrevcomp
) {
836 ac
= expectdomain
[j
].ai
->rev_parsecomp(
837 pai
->qu
->query_dgram
+ labstart
, lablen
);
838 if (ac
< 0) goto mismatch
;
839 assert(i
< sizeof(ipv
[j
]));
842 tp
= expectdomain
[j
].tail
[i
- expectdomain
[j
].ai
->nrevcomp
];
844 strncmp(pai
->qu
->query_dgram
+ labstart
, tp
, lablen
) != 0 ||
852 if (!f
) return adns_s_querydomainwrong
;
856 if (lablen
< 0) return adns_s_querydomainwrong
;
857 for (j
= 0; j
< n_ed
; j
++) {
858 if (!(f
& (1 << j
))) continue;
859 if (i
>= expectdomain
[j
].ai
->nrevcomp
&&
860 !expectdomain
[j
].tail
[i
- expectdomain
[j
].ai
->nrevcomp
])
861 { foundj
= j
; continue; }
863 if (!f
) return adns_s_querydomainwrong
;
865 assert(foundj
>= 0 && f
== (1 << foundj
)); /* collapsed to a single type */
867 ap
->ai
= expectdomain
[foundj
].ai
;
868 ap
->ai
->rev_mkaddr(&ap
->addr
, ipv
[foundj
]);
871 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
872 pai
->dgram
, pai
->dglen
, dmstart
,
873 ap
->ai
->rrtype
, adns_qf_quoteok_query
);
877 ctx
.callback
= icb_ptr
;
878 memset(&ctx
.info
,0,sizeof(ctx
.info
));
879 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(ap
->ai
->rrtype
),
881 adns_qf_quoteok_query
, pai
->now
, &ctx
);
884 nqu
->parent
= pai
->qu
;
885 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
893 static void mf_strpair(adns_query qu
, void *datap
) {
894 adns_rr_strpair
*rrp
= datap
;
896 adns__makefinal_str(qu
,&rrp
->array
[0]);
897 adns__makefinal_str(qu
,&rrp
->array
[1]);
904 static void mf_intstrpair(adns_query qu
, void *datap
) {
905 adns_rr_intstrpair
*rrp
= datap
;
907 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
908 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
915 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
916 int max
, void *datap
) {
917 adns_rr_intstrpair
*rrp
= datap
;
921 for (i
=0; i
<2; i
++) {
922 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
926 if (cbyte
!= max
) return adns_s_invaliddata
;
935 static adns_status
pap_mailbox822(const parseinfo
*pai
,
936 int *cbyte_io
, int max
, char **mb_r
) {
937 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
938 const unsigned char *p
;
946 adns__findlabel_start(&fls
, pai
->ads
,
948 pai
->dgram
, pai
->dglen
, max
,
949 *cbyte_io
, cbyte_io
);
950 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
952 adns__vbuf_appendstr(vb
,".");
957 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
959 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
960 if (c
== '.' && !neednorm
) neednorm
= 1;
961 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
965 if (needquote
|| neednorm
) {
966 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
967 adns__vbuf_appendq(vb
,"\"",1);
968 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
970 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
971 adns__vbuf_appendq(vb
,p
,1);
973 adns__vbuf_appendq(vb
,"\"",1);
975 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
978 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
980 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
984 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
985 memcpy(str
,vb
->buf
,vb
->used
);
991 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
993 if (pai
->qu
->typei
->typekey
& adns__qtf_mail822
) {
994 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
996 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
1000 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
1001 return csp_domain(vb
,mailbox
);
1008 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
1009 int max
, void *datap
) {
1010 adns_rr_strpair
*rrp
= datap
;
1013 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
1016 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
1019 if (cbyte
!= max
) return adns_s_invaliddata
;
1023 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
1024 const adns_rr_strpair
*rrp
= datap
;
1027 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
1029 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
1038 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
1039 int max
, void *datap
) {
1040 adns_rr_soa
*rrp
= datap
;
1041 const byte
*dgram
= pai
->dgram
;
1045 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
1046 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1049 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
1052 if (cbyte
+20 != max
) return adns_s_invaliddata
;
1054 for (i
=0; i
<5; i
++) {
1057 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
1063 static void mf_soa(adns_query qu
, void *datap
) {
1064 adns_rr_soa
*rrp
= datap
;
1066 adns__makefinal_str(qu
,&rrp
->mname
);
1067 adns__makefinal_str(qu
,&rrp
->rname
);
1070 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
1071 const adns_rr_soa
*rrp
= datap
;
1076 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
1078 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
1080 for (i
=0; i
<5; i
++) {
1081 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1089 * _srv* (pa*2,di,cs*2,qdpl,postsort)
1092 static adns_status
qdpl_srv(adns_state ads
,
1093 const char **p_io
, const char *pe
, int labelnum
,
1094 char label_r
[DNS_MAXDOMAIN
], int *ll_io
,
1095 adns_queryflags flags
,
1096 const typeinfo
*typei
) {
1101 if (labelnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1102 useflags
= adns_qf_quoteok_query
;
1108 st
= adns__qdpl_normal(ads
, p_io
,pe
, labelnum
,label_r
, ll_io
, useflags
,typei
);
1113 if (!ll
|| label_r
[0]!='_')
1114 return adns_s_querydomaininvalid
;
1115 if (memchr(p_orig
+1, '\\', pe
- (p_orig
+1)))
1116 return adns_s_querydomaininvalid
;
1121 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1123 /* might be adns_rr_srvraw* */) {
1124 const byte
*dgram
= pai
->dgram
;
1128 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1130 rrp
->priority
= GET_W(cbyte
, ti
);
1131 rrp
->weight
= GET_W(cbyte
, ti
);
1132 rrp
->port
= GET_W(cbyte
, ti
);
1136 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1137 int max
, void *datap
) {
1138 adns_rr_srvraw
*rrp
= datap
;
1141 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1144 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1145 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1148 if (cbyte
!= max
) return adns_s_invaliddata
;
1152 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1153 int max
, void *datap
) {
1154 adns_rr_srvha
*rrp
= datap
;
1157 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1158 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1159 if (cbyte
!= max
) return adns_s_invaliddata
;
1163 static void mf_srvraw(adns_query qu
, void *datap
) {
1164 adns_rr_srvraw
*rrp
= datap
;
1165 adns__makefinal_str(qu
, &rrp
->host
);
1168 static void mf_srvha(adns_query qu
, void *datap
) {
1169 adns_rr_srvha
*rrp
= datap
;
1170 mfp_hostaddr(qu
,&rrp
->ha
);
1173 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1174 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1175 /* might be const adns_rr_svhostaddr* */
1177 if (ap
->priority
< bp
->priority
) return 0;
1178 if (ap
->priority
> bp
->priority
) return 1;
1182 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1183 /* might be adns_rr_srvraw* */) {
1185 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1190 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1191 const adns_rr_srvraw
*rrp
= datap
;
1194 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1195 return csp_domain(vb
,rrp
->host
);
1198 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1199 const adns_rr_srvha
*rrp
= datap
;
1202 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1203 return csp_hostaddr(vb
,&rrp
->ha
);
1206 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,
1207 const struct typeinfo
*typei
) {
1208 /* we treat everything in the array as if it were an adns_rr_srvha
1209 * even though the array might be of adns_rr_srvraw. That's OK
1210 * because they have the same prefix, which is all we access.
1211 * We use typei->rrsz, too, rather than naive array indexing, of course.
1213 char *workbegin
, *workend
, *search
, *arrayend
;
1214 const adns_rr_srvha
*rr
;
1215 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1216 int cpriority
, totalweight
, runtotal
;
1219 for (workbegin
= array
, arrayend
= workbegin
+ typei
->rrsz
* nrrs
;
1220 workbegin
< arrayend
;
1221 workbegin
= workend
) {
1222 cpriority
= (rr
=(void*)workbegin
)->priority
;
1224 for (workend
= workbegin
, totalweight
= 0;
1225 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1226 workend
+= typei
->rrsz
) {
1227 totalweight
+= rr
->weight
;
1230 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1231 * cpriority. From now on, workbegin points to the `remaining'
1232 * records: we select one record at a time (RFC2782 `Usage rules'
1233 * and `Format of the SRV RR' subsection `Weight') to place at
1234 * workbegin (swapping with the one that was there, and then
1235 * advance workbegin. */
1237 workbegin
+ typei
->rrsz
< workend
; /* don't bother if just one */
1238 workbegin
+= typei
->rrsz
) {
1240 randval
= nrand48(ads
->rand48xsubi
);
1241 randval
%= (totalweight
+ 1);
1242 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1243 * totalweight must be <= 2^26 so probability nonuniformity is
1244 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1245 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1248 for (search
=workbegin
, runtotal
=0;
1249 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1250 search
+= typei
->rrsz
);
1251 assert(search
< arrayend
);
1252 totalweight
-= rr
->weight
;
1253 if (search
!= workbegin
) {
1254 memcpy(&rrtmp
, workbegin
, typei
->rrsz
);
1255 memcpy(workbegin
, search
, typei
->rrsz
);
1256 memcpy(search
, &rrtmp
, typei
->rrsz
);
1261 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1262 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1263 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1271 static void mf_byteblock(adns_query qu
, void *datap
) {
1272 adns_rr_byteblock
*rrp
= datap
;
1273 void *bytes
= rrp
->data
;
1274 adns__makefinal_block(qu
,&bytes
,rrp
->len
);
1282 static adns_status
pa_opaque(const parseinfo
*pai
, int cbyte
,
1283 int max
, void *datap
) {
1284 adns_rr_byteblock
*rrp
= datap
;
1286 rrp
->len
= max
- cbyte
;
1287 rrp
->data
= adns__alloc_interim(pai
->qu
, rrp
->len
);
1288 if (!rrp
->data
) R_NOMEM
;
1289 memcpy(rrp
->data
, pai
->dgram
+ cbyte
, rrp
->len
);
1293 static adns_status
cs_opaque(vbuf
*vb
, const void *datap
) {
1294 const adns_rr_byteblock
*rrp
= datap
;
1299 sprintf(buf
,"\\# %d",rrp
->len
);
1302 for (l
= rrp
->len
, p
= rrp
->data
;
1305 sprintf(buf
," %02x%02x%02x%02x",p
[0],p
[1],p
[2],p
[3]);
1311 sprintf(buf
," %02x",*p
);
1321 static void mf_flat(adns_query qu
, void *data
) { }
1327 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1329 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
1330 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
1332 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1333 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1334 printer,parser,comparer, adns__qdpl_normal,0 }
1335 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1336 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1337 printer,parser,comparer, adns__qdpl_normal,0 }
1338 #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer,qdpl,postsort) \
1339 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1340 printer,parser,comparer,qdpl,postsort }
1342 static const typeinfo typeinfos
[] = {
1343 /* Must be in ascending order of rrtype ! */
1344 /* mem-mgmt code rrt fmt member parser comparer printer */
1346 FLAT_TYPE(a
, "A", 0, inaddr
, pa_inaddr
, di_inaddr
,cs_inaddr
),
1347 DEEP_TYPE(ns_raw
, "NS", "raw",str
, pa_host_raw
,0, cs_domain
),
1348 DEEP_TYPE(cname
, "CNAME", 0, str
, pa_dom_raw
, 0, cs_domain
),
1349 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, pa_soa
, 0, cs_soa
),
1350 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, pa_host_raw
,0, cs_domain
),
1351 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,pa_hinfo
, 0, cs_hinfo
),
1352 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, pa_mx_raw
, di_mx_raw
,cs_inthost
),
1353 DEEP_TYPE(txt
, "TXT", 0, manyistr
,pa_txt
, 0, cs_txt
),
1354 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, pa_rp
, 0, cs_rp
),
1355 FLAT_TYPE(aaaa
, "AAAA", 0, in6addr
, pa_in6addr
, di_in6addr
,cs_in6addr
),
1356 XTRA_TYPE(srv_raw
,"SRV", "raw",srvraw
, pa_srvraw
, di_srv
, cs_srvraw
,
1357 qdpl_srv
, postsort_srv
),
1359 FLAT_TYPE(addr
, "A", "addr", addr
, pa_addr
, di_addr
, cs_addr
),
1360 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
,pa_hostaddr
,di_hostaddr
,cs_hostaddr
),
1361 DEEP_TYPE(ptr
, "PTR","checked",str
, pa_ptr
, 0, cs_domain
),
1362 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,pa_mx
, di_mx
, cs_inthostaddr
),
1363 XTRA_TYPE(srv
, "SRV","+addr",srvha
, pa_srvha
, di_srv
, cs_srvha
,
1364 qdpl_srv
, postsort_srv
),
1366 DEEP_TYPE(soa
, "SOA","822", soa
, pa_soa
, 0, cs_soa
),
1367 DEEP_TYPE(rp
, "RP", "822", strpair
, pa_rp
, 0, cs_rp
),
1370 static const typeinfo typeinfo_unknown
=
1371 DEEP_TYPE(unknown
,0, "unknown",byteblock
,pa_opaque
, 0, cs_opaque
);
1373 const typeinfo
*adns__findtype(adns_rrtype type
) {
1374 const typeinfo
*begin
, *end
, *mid
;
1376 if (type
& adns_r_unknown
) return &typeinfo_unknown
;
1378 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1380 while (begin
< end
) {
1381 mid
= begin
+ ((end
-begin
)>>1);
1382 if (mid
->typekey
== type
) return mid
;
1383 if (type
> mid
->typekey
) begin
= mid
+1;