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
;
259 for (i
=0, slp
=ads
->sortlist
;
260 i
<ads
->nsortlist
&& (af
!= slp
->ai
->af
||
261 !slp
->ai
->matchp(ad
, &slp
->base
, &slp
->mask
));
266 static int dip_genaddr(adns_state ads
, int af
, const void *a
, const void *b
) {
269 if (!ads
->nsortlist
) return 0;
271 ai
= search_sortlist(ads
,af
,a
);
272 bi
= search_sortlist(ads
,af
,b
);
276 static int di_inaddr(adns_state ads
,
277 const void *datap_a
, const void *datap_b
) {
278 return dip_genaddr(ads
,AF_INET
,datap_a
,datap_b
);
281 static adns_status
cs_inaddr(vbuf
*vb
, const void *datap
) {
282 const struct in_addr
*rrp
= datap
, rr
= *rrp
;
285 ia
= inet_ntoa(rr
); assert(ia
);
291 * _in6addr (pa,di,cs)
294 static adns_status
pa_in6addr(const parseinfo
*pai
, int cbyte
,
295 int max
, void *datap
) {
296 struct in6_addr
*storeto
= datap
;
298 if (max
-cbyte
!= 16) return adns_s_invaliddata
;
299 memcpy(storeto
->s6_addr
, pai
->dgram
+ cbyte
, 16);
303 static int di_in6addr(adns_state ads
,
304 const void *datap_a
, const void *datap_b
) {
305 return dip_genaddr(ads
,AF_INET6
,datap_a
,AF_INET6
,datap_b
);
308 static adns_status
cs_in6addr(vbuf
*vb
, const void *datap
) {
309 char buf
[INET6_ADDRSTRLEN
];
312 ia
= inet_ntop(AF_INET6
, datap
, buf
, sizeof(buf
)); assert(ia
);
318 * _addr (pa,di,csp,cs, +search_sortlist_sa, dip_sockaddr)
321 static adns_status
pa_addr(const parseinfo
*pai
, int cbyte
,
322 int max
, void *datap
) {
323 adns_rr_addr
*storeto
= datap
;
324 const byte
*dgram
= pai
->dgram
;
326 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
327 storeto
->len
= sizeof(storeto
->addr
.inet
);
328 memset(&storeto
->addr
,0,sizeof(storeto
->addr
.inet
));
329 storeto
->addr
.inet
.sin_family
= AF_INET
;
330 memcpy(&storeto
->addr
.inet
.sin_addr
,dgram
+cbyte
,4);
334 static int search_sortlist_sa(adns_state ads
, const struct sockaddr
*sa
)
336 const struct afinfo
*ai
= 0;
338 switch (sa
->sa_family
) {
339 case AF_INET
: ai
= &adns__inet_afinfo
; break;
340 case AF_INET6
: ai
= &adns__inet6_afinfo
; break;
344 return search_sortlist(ads
, sa
->sa_family
, ai
->sockaddr_to_inaddr(sa
));
347 static int dip_sockaddr(adns_state ads
,
348 const struct sockaddr
*sa
,
349 const struct sockaddr
*sb
)
351 if (!ads
->sortlist
) return 0;
352 return search_sortlist_sa(ads
, sa
) > search_sortlist_sa(ads
, sb
);
355 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
356 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
358 return dip_sockaddr(ads
, &ap
->addr
.sa
, &bp
->addr
.sa
);
361 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
362 const adns_state ads
= context
;
364 return di_addr(ads
, datap_a
, datap_b
);
367 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
371 switch (rrp
->addr
.inet
.sin_family
) {
374 ia
= inet_ntoa(rrp
->addr
.inet
.sin_addr
); assert(ia
);
378 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
385 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
386 const adns_rr_addr
*rrp
= datap
;
388 return csp_addr(vb
,rrp
);
392 * _domain (pap,csp,cs)
396 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
397 char **domain_r
, parsedomain_flags flags
) {
401 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
402 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
404 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
406 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
409 dm
[pai
->qu
->vb
.used
]= 0;
410 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
416 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
418 if (!*domain
) CSP_ADDSTR(".");
422 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
423 const char *const *domainp
= datap
;
424 return csp_domain(vb
,*domainp
);
427 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
428 int max
, void *datap
) {
432 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
435 if (cbyte
!= max
) return adns_s_invaliddata
;
443 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
444 int max
, void *datap
) {
448 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
449 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
452 if (cbyte
!= max
) return adns_s_invaliddata
;
457 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
460 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
461 int *cbyte_io
, int count
, int dmstart
) {
463 int type
, class, rdlen
, rdstart
, ownermatched
;
467 for (rri
=0, naddrs
=-1; rri
<count
; rri
++) {
468 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
469 pai
->dglen
, cbyte_io
,
470 &type
, &class, &ttl
, &rdlen
, &rdstart
,
471 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
473 if (!ownermatched
|| class != DNS_CLASS_IN
|| type
!= adns_r_a
) {
474 if (naddrs
>0) break; else continue;
479 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*sizeof(adns_rr_addr
)))
481 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
482 st
= pa_addr(pai
, rdstart
,rdstart
+rdlen
,
483 pai
->qu
->vb
.buf
+ naddrs
*sizeof(adns_rr_addr
));
488 ha
->addrs
= adns__alloc_interim(pai
->qu
, naddrs
*sizeof(adns_rr_addr
));
489 if (!ha
->addrs
) R_NOMEM
;
490 memcpy(ha
->addrs
, pai
->qu
->vb
.buf
, naddrs
*sizeof(adns_rr_addr
));
492 ha
->astatus
= adns_s_ok
;
494 adns__isort(ha
->addrs
, naddrs
, sizeof(adns_rr_addr
), pai
->qu
->vb
.buf
,
500 static void icb_hostaddr(adns_query parent
, adns_query child
) {
501 adns_answer
*cans
= child
->answer
;
502 adns_rr_hostaddr
*rrp
= child
->ctx
.info
.hostaddr
;
503 adns_state ads
= parent
->ads
;
508 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : cans
->nrrs
;
509 rrp
->addrs
= cans
->rrs
.addr
;
510 adns__transfer_interim(child
, parent
, rrp
->addrs
,
511 rrp
->naddrs
*sizeof(adns_rr_addr
));
513 if (parent
->children
.head
) {
514 LIST_LINK_TAIL(ads
->childw
,parent
);
516 adns__query_done(parent
);
520 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
521 int max
, adns_rr_hostaddr
*rrp
) {
527 adns_queryflags nflags
;
529 dmstart
= cbyte
= *cbyte_io
;
530 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
531 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
535 rrp
->astatus
= adns_s_ok
;
541 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->nscount
, dmstart
);
543 if (rrp
->naddrs
!= -1) return adns_s_ok
;
545 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->arcount
, dmstart
);
547 if (rrp
->naddrs
!= -1) return adns_s_ok
;
549 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
550 pai
->dgram
, pai
->dglen
, dmstart
,
551 adns_r_addr
, adns_qf_quoteok_query
);
555 ctx
.callback
= icb_hostaddr
;
556 ctx
.info
.hostaddr
= rrp
;
558 nflags
= adns_qf_quoteok_query
;
559 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
561 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(adns_r_addr
),
562 &pai
->qu
->vb
, id
, nflags
, pai
->now
, &ctx
);
565 nqu
->parent
= pai
->qu
;
566 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
571 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
572 int max
, void *datap
) {
573 adns_rr_hostaddr
*rrp
= datap
;
576 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
578 if (cbyte
!= max
) return adns_s_invaliddata
;
583 static int dip_hostaddr(adns_state ads
,
584 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
585 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
586 if (ap
->astatus
) return 0;
588 return dip_sockaddr(ads
, &ap
->addrs
[0].addr
.sa
, &bp
->addrs
[0].addr
.sa
);
591 static int di_hostaddr(adns_state ads
,
592 const void *datap_a
, const void *datap_b
) {
593 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
595 return dip_hostaddr(ads
, ap
,bp
);
598 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
601 adns__makefinal_str(qu
,&rrp
->host
);
603 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*sizeof(*rrp
->addrs
));
607 static void mf_hostaddr(adns_query qu
, void *datap
) {
608 adns_rr_hostaddr
*rrp
= datap
;
610 mfp_hostaddr(qu
,rrp
);
613 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
619 st
= csp_domain(vb
,rrp
->host
); if (st
) return st
;
622 CSP_ADDSTR(adns_errtypeabbrev(rrp
->astatus
));
624 sprintf(buf
," %d ",rrp
->astatus
);
627 CSP_ADDSTR(adns_errabbrev(rrp
->astatus
));
630 errstr
= adns_strerror(rrp
->astatus
);
631 st
= csp_qstring(vb
,errstr
,strlen(errstr
)); if (st
) return st
;
633 if (rrp
->naddrs
>= 0) {
635 for (i
=0; i
<rrp
->naddrs
; i
++) {
637 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
646 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
647 const adns_rr_hostaddr
*rrp
= datap
;
649 return csp_hostaddr(vb
,rrp
);
656 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
,
657 int max
, void *datap
) {
658 const byte
*dgram
= pai
->dgram
;
659 adns_rr_intstr
*rrp
= datap
;
663 if (cbyte
+2 > max
) return adns_s_invaliddata
;
666 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
667 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
670 if (cbyte
!= max
) return adns_s_invaliddata
;
674 static int di_mx_raw(adns_state ads
, const void *datap_a
, const void *datap_b
) {
675 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
677 if (ap
->i
< bp
->i
) return 0;
678 if (ap
->i
> bp
->i
) return 1;
686 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
,
687 int max
, void *datap
) {
688 const byte
*dgram
= pai
->dgram
;
689 adns_rr_inthostaddr
*rrp
= datap
;
693 if (cbyte
+2 > max
) return adns_s_invaliddata
;
696 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
699 if (cbyte
!= max
) return adns_s_invaliddata
;
703 static int di_mx(adns_state ads
, const void *datap_a
, const void *datap_b
) {
704 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
706 if (ap
->i
< bp
->i
) return 0;
707 if (ap
->i
> bp
->i
) return 1;
708 return dip_hostaddr(ads
, &ap
->ha
, &bp
->ha
);
712 * _inthostaddr (mf,cs)
715 static void mf_inthostaddr(adns_query qu
, void *datap
) {
716 adns_rr_inthostaddr
*rrp
= datap
;
718 mfp_hostaddr(qu
,&rrp
->ha
);
721 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
722 const adns_rr_inthostaddr
*rrp
= datap
;
725 sprintf(buf
,"%u ",rrp
->i
);
728 return csp_hostaddr(vb
,&rrp
->ha
);
735 static adns_status
cs_inthost(vbuf
*vb
, const void *datap
) {
736 const adns_rr_intstr
*rrp
= datap
;
739 sprintf(buf
,"%u ",rrp
->i
);
741 return csp_domain(vb
,rrp
->str
);
745 * _ptr (pa, +icb_ptr)
748 static void icb_ptr(adns_query parent
, adns_query child
) {
749 adns_answer
*cans
= child
->answer
;
750 const adns_rr_addr
*queried
, *found
;
751 adns_state ads
= parent
->ads
;
754 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
755 adns__query_fail(parent
,adns_s_inconsistent
);
757 } else if (cans
->status
) {
758 adns__query_fail(parent
,cans
->status
);
762 queried
= &parent
->ctx
.info
.ptr_parent_addr
;
763 for (i
=0, found
=cans
->rrs
.addr
; i
<cans
->nrrs
; i
++, found
++) {
764 if (queried
->len
== found
->len
&&
765 !memcmp(&queried
->addr
,&found
->addr
,queried
->len
)) {
766 if (!parent
->children
.head
) {
767 adns__query_done(parent
);
770 LIST_LINK_TAIL(ads
->childw
,parent
);
776 adns__query_fail(parent
,adns_s_inconsistent
);
779 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
780 int max
, void *datap
) {
781 static const char *const (expectdomain
[])= { DNS_INADDR_ARPA
};
790 int cbyte
, i
, lablen
, labstart
, l
, id
;
795 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
796 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
798 if (cbyte
!= max
) return adns_s_invaliddata
;
800 ap
= &pai
->qu
->ctx
.info
.ptr_parent_addr
;
802 adns__findlabel_start(&fls
, pai
->ads
, -1, pai
->qu
,
803 pai
->qu
->query_dgram
, pai
->qu
->query_dglen
,
804 pai
->qu
->query_dglen
, DNS_HDRSIZE
, 0);
805 for (i
=0; i
<4; i
++) {
806 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
); assert(!st
);
807 if (lablen
<=0 || lablen
>3) return adns_s_querydomainwrong
;
808 memcpy(labbuf
, pai
->qu
->query_dgram
+ labstart
, lablen
);
810 ipv
[3-i
]= strtoul(labbuf
,&ep
,10);
811 if (*ep
) return adns_s_querydomainwrong
;
812 if (lablen
>1 && pai
->qu
->query_dgram
[labstart
]=='0')
813 return adns_s_querydomainwrong
;
815 for (i
=0; i
<sizeof(expectdomain
)/sizeof(*expectdomain
); i
++) {
816 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
); assert(!st
);
817 l
= strlen(expectdomain
[i
]);
819 memcmp(pai
->qu
->query_dgram
+ labstart
, expectdomain
[i
], l
))
820 return adns_s_querydomainwrong
;
822 st
= adns__findlabel_next(&fls
,&lablen
,0); assert(!st
);
823 if (lablen
) return adns_s_querydomainwrong
;
825 ap
->len
= sizeof(struct sockaddr_in
);
826 memset(&ap
->addr
,0,sizeof(ap
->addr
.inet
));
827 ap
->addr
.inet
.sin_family
= AF_INET
;
828 ap
->addr
.inet
.sin_addr
.s_addr
=
829 htonl((ipv
[0]<<24) | (ipv
[1]<<16) | (ipv
[2]<<8) | (ipv
[3]));
832 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
833 pai
->dgram
, pai
->dglen
, dmstart
,
834 adns_r_addr
, adns_qf_quoteok_query
);
838 ctx
.callback
= icb_ptr
;
839 memset(&ctx
.info
,0,sizeof(ctx
.info
));
840 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(adns_r_addr
),
842 adns_qf_quoteok_query
, pai
->now
, &ctx
);
845 nqu
->parent
= pai
->qu
;
846 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
854 static void mf_strpair(adns_query qu
, void *datap
) {
855 adns_rr_strpair
*rrp
= datap
;
857 adns__makefinal_str(qu
,&rrp
->array
[0]);
858 adns__makefinal_str(qu
,&rrp
->array
[1]);
865 static void mf_intstrpair(adns_query qu
, void *datap
) {
866 adns_rr_intstrpair
*rrp
= datap
;
868 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
869 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
876 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
877 int max
, void *datap
) {
878 adns_rr_intstrpair
*rrp
= datap
;
882 for (i
=0; i
<2; i
++) {
883 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
887 if (cbyte
!= max
) return adns_s_invaliddata
;
896 static adns_status
pap_mailbox822(const parseinfo
*pai
,
897 int *cbyte_io
, int max
, char **mb_r
) {
898 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
899 const unsigned char *p
;
907 adns__findlabel_start(&fls
, pai
->ads
,
909 pai
->dgram
, pai
->dglen
, max
,
910 *cbyte_io
, cbyte_io
);
911 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
913 adns__vbuf_appendstr(vb
,".");
918 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
920 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
921 if (c
== '.' && !neednorm
) neednorm
= 1;
922 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
926 if (needquote
|| neednorm
) {
927 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
928 adns__vbuf_appendq(vb
,"\"",1);
929 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
931 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
932 adns__vbuf_appendq(vb
,p
,1);
934 adns__vbuf_appendq(vb
,"\"",1);
936 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
939 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
941 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
945 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
946 memcpy(str
,vb
->buf
,vb
->used
);
952 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
954 if (pai
->qu
->typei
->typekey
& adns__qtf_mail822
) {
955 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
957 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
961 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
962 return csp_domain(vb
,mailbox
);
969 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
970 int max
, void *datap
) {
971 adns_rr_strpair
*rrp
= datap
;
974 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
977 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
980 if (cbyte
!= max
) return adns_s_invaliddata
;
984 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
985 const adns_rr_strpair
*rrp
= datap
;
988 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
990 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
999 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
1000 int max
, void *datap
) {
1001 adns_rr_soa
*rrp
= datap
;
1002 const byte
*dgram
= pai
->dgram
;
1006 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
1007 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1010 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
1013 if (cbyte
+20 != max
) return adns_s_invaliddata
;
1015 for (i
=0; i
<5; i
++) {
1018 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
1024 static void mf_soa(adns_query qu
, void *datap
) {
1025 adns_rr_soa
*rrp
= datap
;
1027 adns__makefinal_str(qu
,&rrp
->mname
);
1028 adns__makefinal_str(qu
,&rrp
->rname
);
1031 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
1032 const adns_rr_soa
*rrp
= datap
;
1037 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
1039 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
1041 for (i
=0; i
<5; i
++) {
1042 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1050 * _srv* (pa*2,di,cs*2,qdpl,postsort)
1053 static adns_status
qdpl_srv(adns_state ads
,
1054 const char **p_io
, const char *pe
, int labelnum
,
1055 char label_r
[DNS_MAXDOMAIN
], int *ll_io
,
1056 adns_queryflags flags
,
1057 const typeinfo
*typei
) {
1062 if (labelnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1063 useflags
= adns_qf_quoteok_query
;
1069 st
= adns__qdpl_normal(ads
, p_io
,pe
, labelnum
,label_r
, ll_io
, useflags
,typei
);
1074 if (!ll
|| label_r
[0]!='_')
1075 return adns_s_querydomaininvalid
;
1076 if (memchr(p_orig
+1, '\\', pe
- (p_orig
+1)))
1077 return adns_s_querydomaininvalid
;
1082 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1084 /* might be adns_rr_srvraw* */) {
1085 const byte
*dgram
= pai
->dgram
;
1089 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1091 rrp
->priority
= GET_W(cbyte
, ti
);
1092 rrp
->weight
= GET_W(cbyte
, ti
);
1093 rrp
->port
= GET_W(cbyte
, ti
);
1097 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1098 int max
, void *datap
) {
1099 adns_rr_srvraw
*rrp
= datap
;
1102 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1105 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1106 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1109 if (cbyte
!= max
) return adns_s_invaliddata
;
1113 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1114 int max
, void *datap
) {
1115 adns_rr_srvha
*rrp
= datap
;
1118 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1119 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1120 if (cbyte
!= max
) return adns_s_invaliddata
;
1124 static void mf_srvraw(adns_query qu
, void *datap
) {
1125 adns_rr_srvraw
*rrp
= datap
;
1126 adns__makefinal_str(qu
, &rrp
->host
);
1129 static void mf_srvha(adns_query qu
, void *datap
) {
1130 adns_rr_srvha
*rrp
= datap
;
1131 mfp_hostaddr(qu
,&rrp
->ha
);
1134 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1135 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1136 /* might be const adns_rr_svhostaddr* */
1138 if (ap
->priority
< bp
->priority
) return 0;
1139 if (ap
->priority
> bp
->priority
) return 1;
1143 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1144 /* might be adns_rr_srvraw* */) {
1146 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1151 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1152 const adns_rr_srvraw
*rrp
= datap
;
1155 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1156 return csp_domain(vb
,rrp
->host
);
1159 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1160 const adns_rr_srvha
*rrp
= datap
;
1163 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1164 return csp_hostaddr(vb
,&rrp
->ha
);
1167 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,
1168 const struct typeinfo
*typei
) {
1169 /* we treat everything in the array as if it were an adns_rr_srvha
1170 * even though the array might be of adns_rr_srvraw. That's OK
1171 * because they have the same prefix, which is all we access.
1172 * We use typei->rrsz, too, rather than naive array indexing, of course.
1174 char *workbegin
, *workend
, *search
, *arrayend
;
1175 const adns_rr_srvha
*rr
;
1176 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1177 int cpriority
, totalweight
, runtotal
;
1180 for (workbegin
= array
, arrayend
= workbegin
+ typei
->rrsz
* nrrs
;
1181 workbegin
< arrayend
;
1182 workbegin
= workend
) {
1183 cpriority
= (rr
=(void*)workbegin
)->priority
;
1185 for (workend
= workbegin
, totalweight
= 0;
1186 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1187 workend
+= typei
->rrsz
) {
1188 totalweight
+= rr
->weight
;
1191 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1192 * cpriority. From now on, workbegin points to the `remaining'
1193 * records: we select one record at a time (RFC2782 `Usage rules'
1194 * and `Format of the SRV RR' subsection `Weight') to place at
1195 * workbegin (swapping with the one that was there, and then
1196 * advance workbegin. */
1198 workbegin
+ typei
->rrsz
< workend
; /* don't bother if just one */
1199 workbegin
+= typei
->rrsz
) {
1201 randval
= nrand48(ads
->rand48xsubi
);
1202 randval
%= (totalweight
+ 1);
1203 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1204 * totalweight must be <= 2^26 so probability nonuniformity is
1205 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1206 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1209 for (search
=workbegin
, runtotal
=0;
1210 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1211 search
+= typei
->rrsz
);
1212 assert(search
< arrayend
);
1213 totalweight
-= rr
->weight
;
1214 if (search
!= workbegin
) {
1215 memcpy(&rrtmp
, workbegin
, typei
->rrsz
);
1216 memcpy(workbegin
, search
, typei
->rrsz
);
1217 memcpy(search
, &rrtmp
, typei
->rrsz
);
1222 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1223 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1224 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1232 static void mf_byteblock(adns_query qu
, void *datap
) {
1233 adns_rr_byteblock
*rrp
= datap
;
1234 void *bytes
= rrp
->data
;
1235 adns__makefinal_block(qu
,&bytes
,rrp
->len
);
1243 static adns_status
pa_opaque(const parseinfo
*pai
, int cbyte
,
1244 int max
, void *datap
) {
1245 adns_rr_byteblock
*rrp
= datap
;
1247 rrp
->len
= max
- cbyte
;
1248 rrp
->data
= adns__alloc_interim(pai
->qu
, rrp
->len
);
1249 if (!rrp
->data
) R_NOMEM
;
1250 memcpy(rrp
->data
, pai
->dgram
+ cbyte
, rrp
->len
);
1254 static adns_status
cs_opaque(vbuf
*vb
, const void *datap
) {
1255 const adns_rr_byteblock
*rrp
= datap
;
1260 sprintf(buf
,"\\# %d",rrp
->len
);
1263 for (l
= rrp
->len
, p
= rrp
->data
;
1266 sprintf(buf
," %02x%02x%02x%02x",p
[0],p
[1],p
[2],p
[3]);
1272 sprintf(buf
," %02x",*p
);
1282 static void mf_flat(adns_query qu
, void *data
) { }
1288 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1290 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
1291 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
1293 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1294 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1295 printer,parser,comparer, adns__qdpl_normal,0 }
1296 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1297 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1298 printer,parser,comparer, adns__qdpl_normal,0 }
1299 #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer,qdpl,postsort) \
1300 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1301 printer,parser,comparer,qdpl,postsort }
1303 static const typeinfo typeinfos
[] = {
1304 /* Must be in ascending order of rrtype ! */
1305 /* mem-mgmt code rrt fmt member parser comparer printer */
1307 FLAT_TYPE(a
, "A", 0, inaddr
, pa_inaddr
, di_inaddr
,cs_inaddr
),
1308 DEEP_TYPE(ns_raw
, "NS", "raw",str
, pa_host_raw
,0, cs_domain
),
1309 DEEP_TYPE(cname
, "CNAME", 0, str
, pa_dom_raw
, 0, cs_domain
),
1310 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, pa_soa
, 0, cs_soa
),
1311 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, pa_host_raw
,0, cs_domain
),
1312 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,pa_hinfo
, 0, cs_hinfo
),
1313 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, pa_mx_raw
, di_mx_raw
,cs_inthost
),
1314 DEEP_TYPE(txt
, "TXT", 0, manyistr
,pa_txt
, 0, cs_txt
),
1315 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, pa_rp
, 0, cs_rp
),
1316 FLAT_TYPE(aaaa
, "AAAA", 0, in6addr
, pa_in6addr
, di_in6addr
,cs_in6addr
),
1317 XTRA_TYPE(srv_raw
,"SRV", "raw",srvraw
, pa_srvraw
, di_srv
, cs_srvraw
,
1318 qdpl_srv
, postsort_srv
),
1320 FLAT_TYPE(addr
, "A", "addr", addr
, pa_addr
, di_addr
, cs_addr
),
1321 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
,pa_hostaddr
,di_hostaddr
,cs_hostaddr
),
1322 DEEP_TYPE(ptr
, "PTR","checked",str
, pa_ptr
, 0, cs_domain
),
1323 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,pa_mx
, di_mx
, cs_inthostaddr
),
1324 XTRA_TYPE(srv
, "SRV","+addr",srvha
, pa_srvha
, di_srv
, cs_srvha
,
1325 qdpl_srv
, postsort_srv
),
1327 DEEP_TYPE(soa
, "SOA","822", soa
, pa_soa
, 0, cs_soa
),
1328 DEEP_TYPE(rp
, "RP", "822", strpair
, pa_rp
, 0, cs_rp
),
1331 static const typeinfo typeinfo_unknown
=
1332 DEEP_TYPE(unknown
,0, "unknown",byteblock
,pa_opaque
, 0, cs_opaque
);
1334 const typeinfo
*adns__findtype(adns_rrtype type
) {
1335 const typeinfo
*begin
, *end
, *mid
;
1337 if (type
& adns_r_unknown
) return &typeinfo_unknown
;
1339 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1341 while (begin
< end
) {
1342 mid
= begin
+ ((end
-begin
)>>1);
1343 if (mid
->typekey
== type
) return mid
;
1344 if (type
> mid
->typekey
) begin
= mid
+1;