3 * - RR-type-specific code, and the machinery to call it
6 * This file is part of adns, which is
7 * Copyright (C) 1997-2000,2003,2006 Ian Jackson
8 * Copyright (C) 1999-2000,2003,2006 Tony Finch
9 * Copyright (C) 1991 Massachusetts Institute of Technology
10 * (See the file INSTALL for full details.)
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 #include <sys/types.h>
30 #include <sys/socket.h>
31 #include <netinet/in.h>
32 #include <arpa/inet.h>
36 #define R_NOMEM return adns_s_nomemory
37 #define CSP_ADDSTR(s) do { \
38 if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \
45 * _textdata, _qstring (csp)
51 * +search_sortlist, dip_genaddr, csp_genaddr)
53 * _addr (pa,di,div,csp,cs,gsz
54 * +search_sortlist_sa, dip_sockaddr)
55 * _domain (pap,csp,cs)
58 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs
59 * +pap_findaddrs, icb_hostaddr)
62 * _inthostaddr (mf,cs)
64 * _ptr (ckl,pa +icb_ptr)
68 * _mailbox (pap,csp +pap_mailbox822)
71 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
76 * within each section:
94 static adns_status
pap_qstring(const parseinfo
*pai
, int *cbyte_io
, int max
,
95 int *len_r
, char **str_r
) {
96 /* Neither len_r nor str_r may be null.
97 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
99 const byte
*dgram
= pai
->dgram
;
105 if (cbyte
>= max
) return adns_s_invaliddata
;
107 if (cbyte
+l
> max
) return adns_s_invaliddata
;
109 str
= adns__alloc_interim(pai
->qu
, l
+1);
113 memcpy(str
,dgram
+cbyte
,l
);
122 static adns_status
csp_qstring(vbuf
*vb
, const char *dp
, int len
) {
128 for (cn
=0; cn
<len
; cn
++) {
132 } else if (ch
== '"') {
134 } else if (ch
>= 32 && ch
<= 126) {
135 if (!adns__vbuf_append(vb
,&ch
,1)) R_NOMEM
;
137 sprintf(buf
,"\\x%02x",ch
);
150 static void mf_str(adns_query qu
, void *datap
) {
153 adns__makefinal_str(qu
,rrp
);
160 static void mf_intstr(adns_query qu
, void *datap
) {
161 adns_rr_intstr
*rrp
= datap
;
163 adns__makefinal_str(qu
,&rrp
->str
);
170 static void mf_manyistr(adns_query qu
, void *datap
) {
171 adns_rr_intstr
**rrp
= datap
;
172 adns_rr_intstr
*te
, *table
;
176 for (tc
=0, te
= *rrp
; te
->i
>= 0; te
++, tc
++);
178 adns__makefinal_block(qu
,&tablev
,sizeof(*te
)*(tc
+1));
180 for (te
= *rrp
; te
->i
>= 0; te
++)
181 adns__makefinal_str(qu
,&te
->str
);
188 static adns_status
pa_txt(const parseinfo
*pai
, int cbyte
,
189 int max
, void *datap
) {
190 adns_rr_intstr
**rrp
= datap
, *table
, *te
;
191 const byte
*dgram
= pai
->dgram
;
192 int ti
, tc
, l
, startbyte
;
196 if (cbyte
>= max
) return adns_s_invaliddata
;
198 while (cbyte
< max
) {
203 if (cbyte
!= max
|| !tc
) return adns_s_invaliddata
;
205 table
= adns__alloc_interim(pai
->qu
,sizeof(*table
)*(tc
+1));
208 for (cbyte
=startbyte
, ti
=0, te
=table
; ti
<tc
; ti
++, te
++) {
209 st
= pap_qstring(pai
, &cbyte
, max
, &te
->i
, &te
->str
);
212 assert(cbyte
== max
);
221 static adns_status
cs_txt(vbuf
*vb
, const void *datap
) {
222 const adns_rr_intstr
*const *rrp
= datap
;
223 const adns_rr_intstr
*current
;
227 for (current
= *rrp
, spc
=0; current
->i
>= 0; current
++, spc
=1) {
228 if (spc
) CSP_ADDSTR(" ");
229 st
= csp_qstring(vb
,current
->str
,current
->i
); if (st
) return st
;
238 static adns_status
cs_hinfo(vbuf
*vb
, const void *datap
) {
239 const adns_rr_intstrpair
*rrp
= datap
;
242 st
= csp_qstring(vb
,rrp
->array
[0].str
,rrp
->array
[0].i
); if (st
) return st
;
244 st
= csp_qstring(vb
,rrp
->array
[1].str
,rrp
->array
[1].i
); if (st
) return st
;
249 * _inaddr (pa,di,cs +search_sortlist, dip_genaddr, csp_genaddr)
252 static adns_status
pa_inaddr(const parseinfo
*pai
, int cbyte
,
253 int max
, void *datap
) {
254 struct in_addr
*storeto
= datap
;
256 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
257 memcpy(storeto
, pai
->dgram
+ cbyte
, 4);
261 static int search_sortlist(adns_state ads
, int af
, const void *ad
) {
262 const struct sortlist
*slp
;
265 for (i
=0, slp
=ads
->sortlist
;
267 !adns__addr_match_p(af
,ad
, slp
->af
,&slp
->base
,&slp
->mask
);
272 static int dip_genaddr(adns_state ads
, int af
, const void *a
, const void *b
) {
275 if (!ads
->nsortlist
) return 0;
277 ai
= search_sortlist(ads
,af
,a
);
278 bi
= search_sortlist(ads
,af
,b
);
282 static int di_inaddr(adns_state ads
,
283 const void *datap_a
, const void *datap_b
) {
284 return dip_genaddr(ads
,AF_INET
,datap_a
,datap_b
);
287 static adns_status
csp_genaddr(vbuf
*vb
, int af
, const void *p
) {
288 char buf
[ADNS_ADDR2TEXT_BUFLEN
];
289 int len
= sizeof(buf
);
293 memset(&a
, 0, sizeof(a
));
294 a
.addr
.sa
.sa_family
= af
;
295 adns__sockaddr_inject(p
, 0, &a
.addr
.sa
);
296 err
= adns_addr2text(&a
.addr
.sa
,0, buf
,&len
, 0); assert(!err
);
301 static adns_status
cs_inaddr(vbuf
*vb
, const void *datap
) {
302 return csp_genaddr(vb
, AF_INET
,datap
);
306 * _in6addr (pa,di,cs)
309 static adns_status
pa_in6addr(const parseinfo
*pai
, int cbyte
,
310 int max
, void *datap
) {
311 struct in6_addr
*storeto
= datap
;
313 if (max
-cbyte
!= 16) return adns_s_invaliddata
;
314 memcpy(storeto
->s6_addr
, pai
->dgram
+ cbyte
, 16);
318 static int di_in6addr(adns_state ads
,
319 const void *datap_a
, const void *datap_b
) {
320 return dip_genaddr(ads
,AF_INET6
,datap_a
,datap_b
);
323 static adns_status
cs_in6addr(vbuf
*vb
, const void *datap
) {
324 return csp_genaddr(vb
,AF_INET6
,datap
);
328 * _addr (pa,di,div,csp,cs,gsz +search_sortlist_sa, dip_sockaddr)
331 static adns_status
pa_addr(const parseinfo
*pai
, int cbyte
,
332 int max
, void *datap
) {
333 adns_rr_addr
*storeto
= datap
;
334 const byte
*dgram
= pai
->dgram
;
336 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
337 storeto
->len
= sizeof(storeto
->addr
.inet
);
338 memset(&storeto
->addr
,0,sizeof(storeto
->addr
.inet
));
339 storeto
->addr
.inet
.sin_family
= AF_INET
;
340 memcpy(&storeto
->addr
.inet
.sin_addr
,dgram
+cbyte
,4);
344 static int search_sortlist_sa(adns_state ads
, const struct sockaddr
*sa
) {
346 adns__sockaddr_extract(sa
, &a
, 0);
347 return search_sortlist(ads
, sa
->sa_family
, &a
);
350 static int dip_sockaddr(adns_state ads
,
351 const struct sockaddr
*sa
,
352 const struct sockaddr
*sb
) {
353 if (!ads
->sortlist
) return 0;
354 return search_sortlist_sa(ads
, sa
) > search_sortlist_sa(ads
, sb
);
357 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
358 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
359 return dip_sockaddr(ads
, &ap
->addr
.sa
, &bp
->addr
.sa
);
362 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
363 const adns_state ads
= context
;
365 return di_addr(ads
, datap_a
, datap_b
);
368 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
369 char buf
[ADNS_ADDR2TEXT_BUFLEN
];
370 int len
= sizeof(buf
);
373 switch (rrp
->addr
.inet
.sin_family
) {
378 CSP_ADDSTR("INET6 ");
381 err
= adns_addr2text(&rrp
->addr
.sa
,0, buf
,&len
, 0); assert(!err
);
385 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
392 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
393 const adns_rr_addr
*rrp
= datap
;
395 return csp_addr(vb
,rrp
);
398 static int gsz_addr(const typeinfo
*typei
, adns_rrtype type
) {
399 return type
& adns__qtf_bigaddr ?
400 sizeof(adns_rr_addr
) : sizeof(adns_rr_addr_v4only
);
404 * _domain (pap,csp,cs)
408 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
409 char **domain_r
, parsedomain_flags flags
) {
413 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
414 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
416 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
418 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
421 dm
[pai
->qu
->vb
.used
]= 0;
422 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
428 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
430 if (!*domain
) CSP_ADDSTR(".");
434 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
435 const char *const *domainp
= datap
;
436 return csp_domain(vb
,*domainp
);
439 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
440 int max
, void *datap
) {
444 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
447 if (cbyte
!= max
) return adns_s_invaliddata
;
455 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
456 int max
, void *datap
) {
460 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
461 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
464 if (cbyte
!= max
) return adns_s_invaliddata
;
469 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
472 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
474 int *cbyte_io
, int count
, int dmstart
) {
476 int type
, class, rdlen
, rdstart
, ownermatched
;
480 for (rri
=0, naddrs
=-1; rri
<count
; rri
++) {
481 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
482 pai
->dglen
, cbyte_io
,
483 &type
, &class, &ttl
, &rdlen
, &rdstart
,
484 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
486 if (!ownermatched
|| class != DNS_CLASS_IN
|| type
!= adns_r_a
) {
487 if (naddrs
>0) break; else continue;
492 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*addrsz
))
494 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
495 st
= pa_addr(pai
, rdstart
,rdstart
+rdlen
, pai
->qu
->vb
.buf
+ naddrs
*addrsz
);
500 ha
->addrs
= adns__alloc_interim(pai
->qu
, naddrs
*addrsz
);
501 if (!ha
->addrs
) R_NOMEM
;
502 memcpy(ha
->addrs
, pai
->qu
->vb
.buf
, naddrs
*addrsz
);
504 ha
->astatus
= adns_s_ok
;
506 adns__isort(ha
->addrs
, naddrs
, addrsz
, pai
->qu
->vb
.buf
,
512 static void icb_hostaddr(adns_query parent
, adns_query child
) {
513 adns_answer
*cans
= child
->answer
;
514 adns_rr_hostaddr
*rrp
= child
->ctx
.pinfo
.hostaddr
;
515 adns_state ads
= parent
->ads
;
517 size_t addrsz
= gsz_addr(0, parent
->answer
->type
);
521 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : cans
->nrrs
;
522 rrp
->addrs
= cans
->rrs
.addr
;
523 adns__transfer_interim(child
, parent
, rrp
->addrs
, rrp
->naddrs
*addrsz
);
525 if (parent
->children
.head
) {
526 LIST_LINK_TAIL(ads
->childw
,parent
);
528 adns__query_done(parent
);
532 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
533 int max
, adns_rr_hostaddr
*rrp
) {
539 adns_queryflags nflags
;
540 size_t addrsz
= gsz_addr(0, pai
->qu
->answer
->type
);
542 dmstart
= cbyte
= *cbyte_io
;
543 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
544 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
548 rrp
->astatus
= adns_s_ok
;
554 st
= pap_findaddrs(pai
, rrp
,addrsz
, &cbyte
, pai
->nscount
, dmstart
);
556 if (rrp
->naddrs
!= -1) return adns_s_ok
;
558 st
= pap_findaddrs(pai
, rrp
,addrsz
, &cbyte
, pai
->arcount
, dmstart
);
560 if (rrp
->naddrs
!= -1) return adns_s_ok
;
562 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
563 pai
->dgram
, pai
->dglen
, dmstart
,
564 adns_r_addr
, adns_qf_quoteok_query
);
568 ctx
.callback
= icb_hostaddr
;
569 ctx
.pinfo
.hostaddr
= rrp
;
570 memset(&ctx
.tinfo
, 0, sizeof(ctx
.tinfo
));
572 nflags
= adns_qf_quoteok_query
;
573 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
575 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(adns_r_addr
),
576 ((adns_r_addr
& adns_rrt_reprmask
) |
577 (pai
->qu
->answer
->type
& ~adns_rrt_reprmask
)),
578 &pai
->qu
->vb
, id
, nflags
, pai
->now
, &ctx
);
581 nqu
->parent
= pai
->qu
;
582 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
587 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
588 int max
, void *datap
) {
589 adns_rr_hostaddr
*rrp
= datap
;
592 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
594 if (cbyte
!= max
) return adns_s_invaliddata
;
599 static int dip_hostaddr(adns_state ads
,
600 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
601 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
602 if (ap
->astatus
) return 0;
604 return dip_sockaddr(ads
, &ap
->addrs
[0].addr
.sa
, &bp
->addrs
[0].addr
.sa
);
607 static int di_hostaddr(adns_state ads
,
608 const void *datap_a
, const void *datap_b
) {
609 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
611 return dip_hostaddr(ads
, ap
,bp
);
614 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
616 size_t addrsz
= gsz_addr(0, qu
->answer
->type
);
618 adns__makefinal_str(qu
,&rrp
->host
);
620 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*addrsz
);
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 (ckl,pa +icb_ptr)
765 static adns_status
ckl_ptr(adns_state ads
, adns_queryflags flags
,
766 union checklabel_state
*cls
, qcontext
*ctx
,
767 int labnum
, const char *label
, int lablen
) {
769 if (adns__revparse_label(&cls
->ptr
, labnum
, label
,lablen
))
770 return adns_s_querydomainwrong
;
772 if (adns__revparse_done(&cls
->ptr
, labnum
,
773 &ctx
->tinfo
.ptr
.rev_rrtype
,
774 &ctx
->tinfo
.ptr
.addr
))
775 return adns_s_querydomainwrong
;
780 static void icb_ptr(adns_query parent
, adns_query child
) {
781 adns_answer
*cans
= child
->answer
;
782 const struct af_addr
*queried
;
783 const unsigned char *found
;
784 adns_state ads
= parent
->ads
;
787 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
788 adns__query_fail(parent
,adns_s_inconsistent
);
790 } else if (cans
->status
) {
791 adns__query_fail(parent
,cans
->status
);
795 queried
= &parent
->ctx
.tinfo
.ptr
.addr
;
796 for (i
=0, found
=cans
->rrs
.bytes
; i
<cans
->nrrs
; i
++, found
+=cans
->rrsz
) {
797 if (adns__genaddr_equal_p(queried
->af
,&queried
->addr
,
798 parent
->ctx
.tinfo
.ptr
.addr
.af
,found
)) {
799 if (!parent
->children
.head
) {
800 adns__query_done(parent
);
803 LIST_LINK_TAIL(ads
->childw
,parent
);
809 adns__query_fail(parent
,adns_s_inconsistent
);
812 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
813 int max
, void *datap
) {
816 adns_rrtype rrtype
= pai
->qu
->ctx
.tinfo
.ptr
.rev_rrtype
;
822 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
823 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
825 if (cbyte
!= max
) return adns_s_invaliddata
;
827 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
828 pai
->dgram
, pai
->dglen
, dmstart
,
829 rrtype
, adns_qf_quoteok_query
);
833 ctx
.callback
= icb_ptr
;
834 memset(&ctx
.pinfo
,0,sizeof(ctx
.pinfo
));
835 memset(&ctx
.tinfo
,0,sizeof(ctx
.tinfo
));
836 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(rrtype
),
837 rrtype
, &pai
->qu
->vb
, id
,
838 adns_qf_quoteok_query
, pai
->now
, &ctx
);
841 nqu
->parent
= pai
->qu
;
842 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
850 static void mf_strpair(adns_query qu
, void *datap
) {
851 adns_rr_strpair
*rrp
= datap
;
853 adns__makefinal_str(qu
,&rrp
->array
[0]);
854 adns__makefinal_str(qu
,&rrp
->array
[1]);
861 static void mf_intstrpair(adns_query qu
, void *datap
) {
862 adns_rr_intstrpair
*rrp
= datap
;
864 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
865 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
872 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
873 int max
, void *datap
) {
874 adns_rr_intstrpair
*rrp
= datap
;
878 for (i
=0; i
<2; i
++) {
879 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
883 if (cbyte
!= max
) return adns_s_invaliddata
;
889 * _mailbox (pap,cs +pap_mailbox822)
892 static adns_status
pap_mailbox822(const parseinfo
*pai
,
893 int *cbyte_io
, int max
, char **mb_r
) {
894 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
895 const unsigned char *p
;
903 adns__findlabel_start(&fls
, pai
->ads
,
905 pai
->dgram
, pai
->dglen
, max
,
906 *cbyte_io
, cbyte_io
);
907 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
909 adns__vbuf_appendstr(vb
,".");
914 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
916 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
917 if (c
== '.' && !neednorm
) neednorm
= 1;
918 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
922 if (needquote
|| neednorm
) {
923 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
924 adns__vbuf_appendq(vb
,"\"",1);
925 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
927 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
928 adns__vbuf_appendq(vb
,p
,1);
930 adns__vbuf_appendq(vb
,"\"",1);
932 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
935 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
937 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
941 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
942 memcpy(str
,vb
->buf
,vb
->used
);
948 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
950 if (pai
->qu
->typei
->typekey
& adns__qtf_mail822
) {
951 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
953 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
957 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
958 return csp_domain(vb
,mailbox
);
965 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
966 int max
, void *datap
) {
967 adns_rr_strpair
*rrp
= datap
;
970 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
973 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
976 if (cbyte
!= max
) return adns_s_invaliddata
;
980 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
981 const adns_rr_strpair
*rrp
= datap
;
984 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
986 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
995 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
996 int max
, void *datap
) {
997 adns_rr_soa
*rrp
= datap
;
998 const byte
*dgram
= pai
->dgram
;
1002 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
1003 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1006 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
1009 if (cbyte
+20 != max
) return adns_s_invaliddata
;
1011 for (i
=0; i
<5; i
++) {
1014 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
1020 static void mf_soa(adns_query qu
, void *datap
) {
1021 adns_rr_soa
*rrp
= datap
;
1023 adns__makefinal_str(qu
,&rrp
->mname
);
1024 adns__makefinal_str(qu
,&rrp
->rname
);
1027 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
1028 const adns_rr_soa
*rrp
= datap
;
1033 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
1035 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
1037 for (i
=0; i
<5; i
++) {
1038 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1046 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
1049 static adns_status
ckl_srv(adns_state ads
, adns_queryflags flags
,
1050 union checklabel_state
*cls
, qcontext
*ctx
,
1051 int labnum
, const char *label
, int lablen
) {
1052 if (labnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1053 if (!lablen
|| label
[0] != '_') return adns_s_querydomaininvalid
;
1056 return adns__ckl_hostname(ads
, flags
, cls
, ctx
, labnum
, label
, lablen
);
1059 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1061 /* might be adns_rr_srvraw* */) {
1062 const byte
*dgram
= pai
->dgram
;
1066 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1068 rrp
->priority
= GET_W(cbyte
, ti
);
1069 rrp
->weight
= GET_W(cbyte
, ti
);
1070 rrp
->port
= GET_W(cbyte
, ti
);
1074 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1075 int max
, void *datap
) {
1076 adns_rr_srvraw
*rrp
= datap
;
1079 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1082 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1083 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1086 if (cbyte
!= max
) return adns_s_invaliddata
;
1090 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1091 int max
, void *datap
) {
1092 adns_rr_srvha
*rrp
= datap
;
1095 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1096 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1097 if (cbyte
!= max
) return adns_s_invaliddata
;
1101 static void mf_srvraw(adns_query qu
, void *datap
) {
1102 adns_rr_srvraw
*rrp
= datap
;
1103 adns__makefinal_str(qu
, &rrp
->host
);
1106 static void mf_srvha(adns_query qu
, void *datap
) {
1107 adns_rr_srvha
*rrp
= datap
;
1108 mfp_hostaddr(qu
,&rrp
->ha
);
1111 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1112 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1113 /* might be const adns_rr_svhostaddr* */
1115 if (ap
->priority
< bp
->priority
) return 0;
1116 if (ap
->priority
> bp
->priority
) return 1;
1120 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1121 /* might be adns_rr_srvraw* */) {
1123 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1128 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1129 const adns_rr_srvraw
*rrp
= datap
;
1132 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1133 return csp_domain(vb
,rrp
->host
);
1136 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1137 const adns_rr_srvha
*rrp
= datap
;
1140 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1141 return csp_hostaddr(vb
,&rrp
->ha
);
1144 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,int rrsz
,
1145 const struct typeinfo
*typei
) {
1146 /* we treat everything in the array as if it were an adns_rr_srvha
1147 * even though the array might be of adns_rr_srvraw. That's OK
1148 * because they have the same prefix, which is all we access.
1149 * We use rrsz, too, rather than naive array indexing, of course.
1151 char *workbegin
, *workend
, *search
, *arrayend
;
1152 const adns_rr_srvha
*rr
;
1153 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1154 int cpriority
, totalweight
, runtotal
;
1157 assert(rrsz
<= sizeof(rrtmp
));
1158 for (workbegin
= array
, arrayend
= workbegin
+ rrsz
* nrrs
;
1159 workbegin
< arrayend
;
1160 workbegin
= workend
) {
1161 cpriority
= (rr
=(void*)workbegin
)->priority
;
1163 for (workend
= workbegin
, totalweight
= 0;
1164 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1166 totalweight
+= rr
->weight
;
1169 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1170 * cpriority. From now on, workbegin points to the `remaining'
1171 * records: we select one record at a time (RFC2782 `Usage rules'
1172 * and `Format of the SRV RR' subsection `Weight') to place at
1173 * workbegin (swapping with the one that was there, and then
1174 * advance workbegin. */
1176 workbegin
+ rrsz
< workend
; /* don't bother if just one */
1177 workbegin
+= rrsz
) {
1179 randval
= nrand48(ads
->rand48xsubi
);
1180 randval
%= (totalweight
+ 1);
1181 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1182 * totalweight must be <= 2^26 so probability nonuniformity is
1183 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1184 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1187 for (search
=workbegin
, runtotal
=0;
1188 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1190 assert(search
< arrayend
);
1191 totalweight
-= rr
->weight
;
1192 if (search
!= workbegin
) {
1193 memcpy(&rrtmp
, workbegin
, rrsz
);
1194 memcpy(workbegin
, search
, rrsz
);
1195 memcpy(search
, &rrtmp
, rrsz
);
1200 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1201 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1202 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1210 static void mf_byteblock(adns_query qu
, void *datap
) {
1211 adns_rr_byteblock
*rrp
= datap
;
1212 void *bytes
= rrp
->data
;
1213 adns__makefinal_block(qu
,&bytes
,rrp
->len
);
1221 static adns_status
pa_opaque(const parseinfo
*pai
, int cbyte
,
1222 int max
, void *datap
) {
1223 adns_rr_byteblock
*rrp
= datap
;
1225 rrp
->len
= max
- cbyte
;
1226 rrp
->data
= adns__alloc_interim(pai
->qu
, rrp
->len
);
1227 if (!rrp
->data
) R_NOMEM
;
1228 memcpy(rrp
->data
, pai
->dgram
+ cbyte
, rrp
->len
);
1232 static adns_status
cs_opaque(vbuf
*vb
, const void *datap
) {
1233 const adns_rr_byteblock
*rrp
= datap
;
1238 sprintf(buf
,"\\# %d",rrp
->len
);
1241 for (l
= rrp
->len
, p
= rrp
->data
;
1244 sprintf(buf
," %02x%02x%02x%02x",p
[0],p
[1],p
[2],p
[3]);
1250 sprintf(buf
," %02x",*p
);
1260 static void mf_flat(adns_query qu
, void *data
) { }
1266 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1268 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1269 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1270 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1271 adns__ckl_hostname, 0, adns__getrrsz_default, CDR(__VA_ARGS__) }
1272 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1273 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1274 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1275 adns__ckl_hostname, 0, adns__getrrsz_default, CDR(__VA_ARGS__) }
1279 static const typeinfo typeinfos
[] = {
1280 /* Must be in ascending order of rrtype ! */
1281 /* mem-mgmt code rrt fmt member parser comparer printer */
1283 FLAT_TYPE(a
, "A", 0, inaddr
, inaddr
, inaddr
,inaddr
),
1284 DEEP_TYPE(ns_raw
, "NS", "raw",str
, host_raw
,0, domain
),
1285 DEEP_TYPE(cname
, "CNAME", 0, str
, dom_raw
, 0, domain
),
1286 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, soa
, 0, soa
),
1287 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, host_raw
,0, domain
),
1288 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,hinfo
, 0, hinfo
),
1289 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, mx_raw
, mx_raw
,inthost
),
1290 DEEP_TYPE(txt
, "TXT", 0, manyistr
, txt
, 0, txt
),
1291 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, rp
, 0, rp
),
1292 FLAT_TYPE(aaaa
, "AAAA", 0, in6addr
, in6addr
, in6addr
,in6addr
),
1293 DEEP_TYPE(srv_raw
,"SRV", "raw",srvraw
, srvraw
, srv
, srvraw
,
1294 .checklabel
= ckl_srv
, .postsort
= postsort_srv
),
1296 FLAT_TYPE(addr
, "A", "addr", addr
, addr
, addr
, addr
,
1297 .getrrsz
= gsz_addr
),
1298 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
, hostaddr
,hostaddr
,hostaddr
),
1299 DEEP_TYPE(ptr
, "PTR","checked",str
, ptr
, 0, domain
,
1300 .checklabel
= ckl_ptr
),
1301 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,mx
, mx
, inthostaddr
, ),
1302 DEEP_TYPE(srv
, "SRV","+addr",srvha
, srvha
, srv
, srvha
,
1303 .checklabel
= ckl_srv
, .postsort
= postsort_srv
),
1305 DEEP_TYPE(soa
, "SOA","822", soa
, soa
, 0, soa
),
1306 DEEP_TYPE(rp
, "RP", "822", strpair
, rp
, 0, rp
),
1309 static const typeinfo typeinfo_unknown
=
1310 DEEP_TYPE(unknown
,0, "unknown",byteblock
,opaque
, 0, opaque
);
1312 const typeinfo
*adns__findtype(adns_rrtype type
) {
1313 const typeinfo
*begin
, *end
, *mid
;
1315 if (type
& adns_r_unknown
) return &typeinfo_unknown
;
1316 type
&= adns_rrt_reprmask
;
1318 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1320 while (begin
< end
) {
1321 mid
= begin
+ ((end
-begin
)>>1);
1322 if (mid
->typekey
== type
) return mid
;
1323 if (type
> mid
->typekey
) begin
= mid
+1;