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:
95 static adns_status
pap_qstring(const parseinfo
*pai
, int *cbyte_io
, int max
,
96 int *len_r
, char **str_r
) {
97 /* Neither len_r nor str_r may be null.
98 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
100 const byte
*dgram
= pai
->dgram
;
106 if (cbyte
>= max
) return adns_s_invaliddata
;
108 if (cbyte
+l
> max
) return adns_s_invaliddata
;
110 str
= adns__alloc_interim(pai
->qu
, l
+1);
114 memcpy(str
,dgram
+cbyte
,l
);
123 static adns_status
csp_qstring(vbuf
*vb
, const char *dp
, int len
) {
129 for (cn
=0; cn
<len
; cn
++) {
133 } else if (ch
== '"') {
135 } else if (ch
>= 32 && ch
<= 126) {
136 if (!adns__vbuf_append(vb
,&ch
,1)) R_NOMEM
;
138 sprintf(buf
,"\\x%02x",ch
);
151 static void mf_str(adns_query qu
, void *datap
) {
154 adns__makefinal_str(qu
,rrp
);
161 static void mf_intstr(adns_query qu
, void *datap
) {
162 adns_rr_intstr
*rrp
= datap
;
164 adns__makefinal_str(qu
,&rrp
->str
);
171 static void mf_manyistr(adns_query qu
, void *datap
) {
172 adns_rr_intstr
**rrp
= datap
;
173 adns_rr_intstr
*te
, *table
;
177 for (tc
=0, te
= *rrp
; te
->i
>= 0; te
++, tc
++);
179 adns__makefinal_block(qu
,&tablev
,sizeof(*te
)*(tc
+1));
181 for (te
= *rrp
; te
->i
>= 0; te
++)
182 adns__makefinal_str(qu
,&te
->str
);
189 static adns_status
pa_txt(const parseinfo
*pai
, int cbyte
,
190 int max
, void *datap
) {
191 adns_rr_intstr
**rrp
= datap
, *table
, *te
;
192 const byte
*dgram
= pai
->dgram
;
193 int ti
, tc
, l
, startbyte
;
197 if (cbyte
>= max
) return adns_s_invaliddata
;
199 while (cbyte
< max
) {
204 if (cbyte
!= max
|| !tc
) return adns_s_invaliddata
;
206 table
= adns__alloc_interim(pai
->qu
,sizeof(*table
)*(tc
+1));
209 for (cbyte
=startbyte
, ti
=0, te
=table
; ti
<tc
; ti
++, te
++) {
210 st
= pap_qstring(pai
, &cbyte
, max
, &te
->i
, &te
->str
);
213 assert(cbyte
== max
);
222 static adns_status
cs_txt(vbuf
*vb
, const void *datap
) {
223 const adns_rr_intstr
*const *rrp
= datap
;
224 const adns_rr_intstr
*current
;
228 for (current
= *rrp
, spc
=0; current
->i
>= 0; current
++, spc
=1) {
229 if (spc
) CSP_ADDSTR(" ");
230 st
= csp_qstring(vb
,current
->str
,current
->i
); if (st
) return st
;
239 static adns_status
cs_hinfo(vbuf
*vb
, const void *datap
) {
240 const adns_rr_intstrpair
*rrp
= datap
;
243 st
= csp_qstring(vb
,rrp
->array
[0].str
,rrp
->array
[0].i
); if (st
) return st
;
245 st
= csp_qstring(vb
,rrp
->array
[1].str
,rrp
->array
[1].i
); if (st
) return st
;
250 * _inaddr (pa,di,cs +search_sortlist, dip_genaddr, csp_genaddr)
253 static adns_status
pa_inaddr(const parseinfo
*pai
, int cbyte
,
254 int max
, void *datap
) {
255 struct in_addr
*storeto
= datap
;
257 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
258 memcpy(storeto
, pai
->dgram
+ cbyte
, 4);
262 static int search_sortlist(adns_state ads
, int af
, const void *ad
) {
263 const struct sortlist
*slp
;
264 const struct in6_addr
*a6
;
269 if (af
== AF_INET6
) {
271 if (IN6_IS_ADDR_V4MAPPED(a6
)) {
272 a
.v4
.s_addr
= htonl(((unsigned long)a6
->s6_addr
[12] << 24) |
273 ((unsigned long)a6
->s6_addr
[13] << 16) |
274 ((unsigned long)a6
->s6_addr
[14] << 8) |
275 ((unsigned long)a6
->s6_addr
[15] << 0));
280 for (i
=0, slp
=ads
->sortlist
;
282 !adns__addr_match_p(af
,ad
, slp
->af
,&slp
->base
,&slp
->mask
) &&
284 adns__addr_match_p(AF_INET
,&a
, slp
->af
,&slp
->base
,&slp
->mask
));
289 static int dip_genaddr(adns_state ads
, int af
, const void *a
, const void *b
) {
292 if (!ads
->nsortlist
) return 0;
294 ai
= search_sortlist(ads
,af
,a
);
295 bi
= search_sortlist(ads
,af
,b
);
299 static int di_inaddr(adns_state ads
,
300 const void *datap_a
, const void *datap_b
) {
301 return dip_genaddr(ads
,AF_INET
,datap_a
,datap_b
);
304 static adns_status
csp_genaddr(vbuf
*vb
, int af
, const void *p
) {
305 char buf
[ADNS_ADDR2TEXT_BUFLEN
];
306 int len
= sizeof(buf
);
310 memset(&a
, 0, sizeof(a
));
311 a
.addr
.sa
.sa_family
= af
;
312 adns__sockaddr_inject(p
, 0, &a
.addr
.sa
);
313 err
= adns_addr2text(&a
.addr
.sa
,0, buf
,&len
, 0); assert(!err
);
318 static adns_status
cs_inaddr(vbuf
*vb
, const void *datap
) {
319 return csp_genaddr(vb
, AF_INET
,datap
);
323 * _in6addr (pa,di,cs)
326 static adns_status
pa_in6addr(const parseinfo
*pai
, int cbyte
,
327 int max
, void *datap
) {
328 struct in6_addr
*storeto
= datap
;
330 if (max
-cbyte
!= 16) return adns_s_invaliddata
;
331 memcpy(storeto
->s6_addr
, pai
->dgram
+ cbyte
, 16);
335 static int di_in6addr(adns_state ads
,
336 const void *datap_a
, const void *datap_b
) {
337 return dip_genaddr(ads
,AF_INET6
,datap_a
,datap_b
);
340 static adns_status
cs_in6addr(vbuf
*vb
, const void *datap
) {
341 return csp_genaddr(vb
,AF_INET6
,datap
);
345 * _addr (pa,di,div,csp,cs,gsz +search_sortlist_sa, dip_sockaddr)
348 static adns_status
pa_addr(const parseinfo
*pai
, int cbyte
,
349 int max
, void *datap
) {
350 adns_rr_addr
*storeto
= datap
;
351 const byte
*dgram
= pai
->dgram
;
353 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
354 storeto
->len
= sizeof(storeto
->addr
.inet
);
355 memset(&storeto
->addr
,0,sizeof(storeto
->addr
.inet
));
356 storeto
->addr
.inet
.sin_family
= AF_INET
;
357 memcpy(&storeto
->addr
.inet
.sin_addr
,dgram
+cbyte
,4);
361 static int search_sortlist_sa(adns_state ads
, const struct sockaddr
*sa
) {
363 adns__sockaddr_extract(sa
, &a
, 0);
364 return search_sortlist(ads
, sa
->sa_family
, &a
);
367 static int dip_sockaddr(adns_state ads
,
368 const struct sockaddr
*sa
,
369 const struct sockaddr
*sb
) {
370 if (!ads
->sortlist
) return 0;
371 return search_sortlist_sa(ads
, sa
) > search_sortlist_sa(ads
, sb
);
374 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
375 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
376 return dip_sockaddr(ads
, &ap
->addr
.sa
, &bp
->addr
.sa
);
379 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
380 const adns_state ads
= context
;
382 return di_addr(ads
, datap_a
, datap_b
);
385 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
386 char buf
[ADNS_ADDR2TEXT_BUFLEN
];
387 int len
= sizeof(buf
);
390 switch (rrp
->addr
.inet
.sin_family
) {
395 CSP_ADDSTR("INET6 ");
398 err
= adns_addr2text(&rrp
->addr
.sa
,0, buf
,&len
, 0); assert(!err
);
402 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
409 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
410 const adns_rr_addr
*rrp
= datap
;
412 return csp_addr(vb
,rrp
);
415 static int gsz_addr(const typeinfo
*typei
, adns_rrtype type
) {
416 return type
& adns__qtf_bigaddr ?
417 sizeof(adns_rr_addr
) : sizeof(adns_rr_addr_v4only
);
421 * _domain (pap,csp,cs)
425 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
426 char **domain_r
, parsedomain_flags flags
) {
430 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
431 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
433 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
435 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
438 dm
[pai
->qu
->vb
.used
]= 0;
439 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
445 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
447 if (!*domain
) CSP_ADDSTR(".");
451 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
452 const char *const *domainp
= datap
;
453 return csp_domain(vb
,*domainp
);
456 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
457 int max
, void *datap
) {
461 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
464 if (cbyte
!= max
) return adns_s_invaliddata
;
472 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
473 int max
, void *datap
) {
477 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
478 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
481 if (cbyte
!= max
) return adns_s_invaliddata
;
486 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
489 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
491 int *cbyte_io
, int count
, int dmstart
) {
493 int type
, class, rdlen
, rdstart
, ownermatched
;
497 for (rri
=0, naddrs
=-1; rri
<count
; rri
++) {
498 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
499 pai
->dglen
, cbyte_io
,
500 &type
, &class, &ttl
, &rdlen
, &rdstart
,
501 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
503 if (!ownermatched
|| class != DNS_CLASS_IN
|| type
!= adns_r_a
) {
504 if (naddrs
>0) break; else continue;
509 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*addrsz
))
511 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
512 st
= pa_addr(pai
, rdstart
,rdstart
+rdlen
, pai
->qu
->vb
.buf
+ naddrs
*addrsz
);
517 ha
->addrs
= adns__alloc_interim(pai
->qu
, naddrs
*addrsz
);
518 if (!ha
->addrs
) R_NOMEM
;
519 memcpy(ha
->addrs
, pai
->qu
->vb
.buf
, naddrs
*addrsz
);
521 ha
->astatus
= adns_s_ok
;
523 adns__isort(ha
->addrs
, naddrs
, addrsz
, pai
->qu
->vb
.buf
,
529 static void icb_hostaddr(adns_query parent
, adns_query child
) {
530 adns_answer
*cans
= child
->answer
;
531 adns_rr_hostaddr
*rrp
= child
->ctx
.pinfo
.hostaddr
;
532 adns_state ads
= parent
->ads
;
537 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : cans
->nrrs
;
538 rrp
->addrs
= cans
->rrs
.addr
;
539 adns__transfer_interim(child
, parent
, rrp
->addrs
);
541 if (parent
->children
.head
) {
542 LIST_LINK_TAIL(ads
->childw
,parent
);
544 adns__query_done(parent
);
548 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
549 int max
, adns_rr_hostaddr
*rrp
) {
555 adns_queryflags nflags
;
556 size_t addrsz
= gsz_addr(0, pai
->qu
->answer
->type
);
558 dmstart
= cbyte
= *cbyte_io
;
559 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
560 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
564 rrp
->astatus
= adns_s_ok
;
570 st
= pap_findaddrs(pai
, rrp
,addrsz
, &cbyte
, pai
->nscount
, dmstart
);
572 if (rrp
->naddrs
!= -1) return adns_s_ok
;
574 st
= pap_findaddrs(pai
, rrp
,addrsz
, &cbyte
, pai
->arcount
, dmstart
);
576 if (rrp
->naddrs
!= -1) return adns_s_ok
;
578 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
579 pai
->dgram
, pai
->dglen
, dmstart
,
580 adns_r_addr
, adns_qf_quoteok_query
);
584 ctx
.callback
= icb_hostaddr
;
585 ctx
.pinfo
.hostaddr
= rrp
;
586 memset(&ctx
.tinfo
, 0, sizeof(ctx
.tinfo
));
588 nflags
= adns_qf_quoteok_query
;
589 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
591 st
= adns__internal_submit(pai
->ads
, &nqu
, pai
->qu
,
592 adns__findtype(adns_r_addr
),
593 ((adns_r_addr
& adns_rrt_reprmask
) |
594 (pai
->qu
->answer
->type
& ~adns_rrt_reprmask
)),
595 &pai
->qu
->vb
, id
, nflags
, pai
->now
, &ctx
);
601 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
602 int max
, void *datap
) {
603 adns_rr_hostaddr
*rrp
= datap
;
606 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
608 if (cbyte
!= max
) return adns_s_invaliddata
;
613 static int dip_hostaddr(adns_state ads
,
614 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
615 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
616 if (ap
->astatus
) return 0;
618 return dip_sockaddr(ads
, &ap
->addrs
[0].addr
.sa
, &bp
->addrs
[0].addr
.sa
);
621 static int di_hostaddr(adns_state ads
,
622 const void *datap_a
, const void *datap_b
) {
623 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
625 return dip_hostaddr(ads
, ap
,bp
);
628 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
630 size_t addrsz
= gsz_addr(0, qu
->answer
->type
);
632 adns__makefinal_str(qu
,&rrp
->host
);
634 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*addrsz
);
638 static void mf_hostaddr(adns_query qu
, void *datap
) {
639 adns_rr_hostaddr
*rrp
= datap
;
641 mfp_hostaddr(qu
,rrp
);
644 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
650 st
= csp_domain(vb
,rrp
->host
); if (st
) return st
;
653 CSP_ADDSTR(adns_errtypeabbrev(rrp
->astatus
));
655 sprintf(buf
," %d ",rrp
->astatus
);
658 CSP_ADDSTR(adns_errabbrev(rrp
->astatus
));
661 errstr
= adns_strerror(rrp
->astatus
);
662 st
= csp_qstring(vb
,errstr
,strlen(errstr
)); if (st
) return st
;
664 if (rrp
->naddrs
>= 0) {
666 for (i
=0; i
<rrp
->naddrs
; i
++) {
668 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
677 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
678 const adns_rr_hostaddr
*rrp
= datap
;
680 return csp_hostaddr(vb
,rrp
);
687 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
,
688 int max
, void *datap
) {
689 const byte
*dgram
= pai
->dgram
;
690 adns_rr_intstr
*rrp
= datap
;
694 if (cbyte
+2 > max
) return adns_s_invaliddata
;
697 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
698 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
701 if (cbyte
!= max
) return adns_s_invaliddata
;
705 static int di_mx_raw(adns_state ads
, const void *datap_a
, const void *datap_b
) {
706 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
708 if (ap
->i
< bp
->i
) return 0;
709 if (ap
->i
> bp
->i
) return 1;
717 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
,
718 int max
, void *datap
) {
719 const byte
*dgram
= pai
->dgram
;
720 adns_rr_inthostaddr
*rrp
= datap
;
724 if (cbyte
+2 > max
) return adns_s_invaliddata
;
727 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
730 if (cbyte
!= max
) return adns_s_invaliddata
;
734 static int di_mx(adns_state ads
, const void *datap_a
, const void *datap_b
) {
735 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
737 if (ap
->i
< bp
->i
) return 0;
738 if (ap
->i
> bp
->i
) return 1;
739 return dip_hostaddr(ads
, &ap
->ha
, &bp
->ha
);
743 * _inthostaddr (mf,cs)
746 static void mf_inthostaddr(adns_query qu
, void *datap
) {
747 adns_rr_inthostaddr
*rrp
= datap
;
749 mfp_hostaddr(qu
,&rrp
->ha
);
752 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
753 const adns_rr_inthostaddr
*rrp
= datap
;
756 sprintf(buf
,"%u ",rrp
->i
);
759 return csp_hostaddr(vb
,&rrp
->ha
);
766 static adns_status
cs_inthost(vbuf
*vb
, const void *datap
) {
767 const adns_rr_intstr
*rrp
= datap
;
770 sprintf(buf
,"%u ",rrp
->i
);
772 return csp_domain(vb
,rrp
->str
);
776 * _ptr (ckl,pa +icb_ptr)
779 static adns_status
ckl_ptr(adns_state ads
, adns_queryflags flags
,
780 union checklabel_state
*cls
, qcontext
*ctx
,
781 int labnum
, const char *label
, int lablen
) {
783 if (adns__revparse_label(&cls
->ptr
, labnum
, label
,lablen
))
784 return adns_s_querydomainwrong
;
786 if (adns__revparse_done(&cls
->ptr
, labnum
,
787 &ctx
->tinfo
.ptr
.rev_rrtype
,
788 &ctx
->tinfo
.ptr
.addr
))
789 return adns_s_querydomainwrong
;
794 static void icb_ptr(adns_query parent
, adns_query child
) {
795 adns_answer
*cans
= child
->answer
;
796 const struct af_addr
*queried
;
797 const unsigned char *found
;
798 adns_state ads
= parent
->ads
;
801 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
802 adns__query_fail(parent
,adns_s_inconsistent
);
804 } else if (cans
->status
) {
805 adns__query_fail(parent
,cans
->status
);
809 queried
= &parent
->ctx
.tinfo
.ptr
.addr
;
810 for (i
=0, found
=cans
->rrs
.bytes
; i
<cans
->nrrs
; i
++, found
+=cans
->rrsz
) {
811 if (adns__genaddr_equal_p(queried
->af
,&queried
->addr
,
812 parent
->ctx
.tinfo
.ptr
.addr
.af
,found
)) {
813 if (!parent
->children
.head
) {
814 adns__query_done(parent
);
817 LIST_LINK_TAIL(ads
->childw
,parent
);
823 adns__query_fail(parent
,adns_s_inconsistent
);
826 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
827 int max
, void *datap
) {
830 adns_rrtype rrtype
= pai
->qu
->ctx
.tinfo
.ptr
.rev_rrtype
;
836 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
837 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
839 if (cbyte
!= max
) return adns_s_invaliddata
;
841 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
842 pai
->dgram
, pai
->dglen
, dmstart
,
843 rrtype
, adns_qf_quoteok_query
);
847 ctx
.callback
= icb_ptr
;
848 memset(&ctx
.pinfo
,0,sizeof(ctx
.pinfo
));
849 memset(&ctx
.tinfo
,0,sizeof(ctx
.tinfo
));
850 st
= adns__internal_submit(pai
->ads
, &nqu
, pai
->qu
,
851 adns__findtype(rrtype
),
852 rrtype
, &pai
->qu
->vb
, id
,
853 adns_qf_quoteok_query
, pai
->now
, &ctx
);
863 static void mf_strpair(adns_query qu
, void *datap
) {
864 adns_rr_strpair
*rrp
= datap
;
866 adns__makefinal_str(qu
,&rrp
->array
[0]);
867 adns__makefinal_str(qu
,&rrp
->array
[1]);
874 static void mf_intstrpair(adns_query qu
, void *datap
) {
875 adns_rr_intstrpair
*rrp
= datap
;
877 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
878 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
885 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
886 int max
, void *datap
) {
887 adns_rr_intstrpair
*rrp
= datap
;
891 for (i
=0; i
<2; i
++) {
892 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
896 if (cbyte
!= max
) return adns_s_invaliddata
;
902 * _mailbox (pap,cs +pap_mailbox822)
905 static adns_status
pap_mailbox822(const parseinfo
*pai
,
906 int *cbyte_io
, int max
, char **mb_r
) {
907 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
908 const unsigned char *p
;
916 adns__findlabel_start(&fls
, pai
->ads
,
918 pai
->dgram
, pai
->dglen
, max
,
919 *cbyte_io
, cbyte_io
);
920 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
922 adns__vbuf_appendstr(vb
,".");
927 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
929 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
930 if (c
== '.' && !neednorm
) neednorm
= 1;
931 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
935 if (needquote
|| neednorm
) {
936 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
937 adns__vbuf_appendq(vb
,"\"",1);
938 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
940 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
941 adns__vbuf_appendq(vb
,p
,1);
943 adns__vbuf_appendq(vb
,"\"",1);
945 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
948 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
950 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
954 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
955 memcpy(str
,vb
->buf
,vb
->used
);
961 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
963 if (pai
->qu
->typei
->typekey
& adns__qtf_mail822
) {
964 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
966 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
970 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
971 return csp_domain(vb
,mailbox
);
978 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
979 int max
, void *datap
) {
980 adns_rr_strpair
*rrp
= datap
;
983 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
986 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
989 if (cbyte
!= max
) return adns_s_invaliddata
;
993 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
994 const adns_rr_strpair
*rrp
= datap
;
997 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
999 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
1008 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
1009 int max
, void *datap
) {
1010 adns_rr_soa
*rrp
= datap
;
1011 const byte
*dgram
= pai
->dgram
;
1015 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
1016 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1019 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
1022 if (cbyte
+20 != max
) return adns_s_invaliddata
;
1024 for (i
=0; i
<5; i
++) {
1027 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
1033 static void mf_soa(adns_query qu
, void *datap
) {
1034 adns_rr_soa
*rrp
= datap
;
1036 adns__makefinal_str(qu
,&rrp
->mname
);
1037 adns__makefinal_str(qu
,&rrp
->rname
);
1040 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
1041 const adns_rr_soa
*rrp
= datap
;
1046 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
1048 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
1050 for (i
=0; i
<5; i
++) {
1051 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1059 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
1062 static adns_status
ckl_srv(adns_state ads
, adns_queryflags flags
,
1063 union checklabel_state
*cls
, qcontext
*ctx
,
1064 int labnum
, const char *label
, int lablen
) {
1065 if (labnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1066 if (!lablen
|| label
[0] != '_') return adns_s_querydomaininvalid
;
1069 return adns__ckl_hostname(ads
, flags
, cls
, ctx
, labnum
, label
, lablen
);
1072 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1074 /* might be adns_rr_srvraw* */) {
1075 const byte
*dgram
= pai
->dgram
;
1079 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1081 rrp
->priority
= GET_W(cbyte
, ti
);
1082 rrp
->weight
= GET_W(cbyte
, ti
);
1083 rrp
->port
= GET_W(cbyte
, ti
);
1087 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1088 int max
, void *datap
) {
1089 adns_rr_srvraw
*rrp
= datap
;
1092 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1095 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1096 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1099 if (cbyte
!= max
) return adns_s_invaliddata
;
1103 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1104 int max
, void *datap
) {
1105 adns_rr_srvha
*rrp
= datap
;
1108 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1109 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1110 if (cbyte
!= max
) return adns_s_invaliddata
;
1114 static void mf_srvraw(adns_query qu
, void *datap
) {
1115 adns_rr_srvraw
*rrp
= datap
;
1116 adns__makefinal_str(qu
, &rrp
->host
);
1119 static void mf_srvha(adns_query qu
, void *datap
) {
1120 adns_rr_srvha
*rrp
= datap
;
1121 mfp_hostaddr(qu
,&rrp
->ha
);
1124 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1125 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1126 /* might be const adns_rr_svhostaddr* */
1128 if (ap
->priority
< bp
->priority
) return 0;
1129 if (ap
->priority
> bp
->priority
) return 1;
1133 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1134 /* might be adns_rr_srvraw* */) {
1136 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1141 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1142 const adns_rr_srvraw
*rrp
= datap
;
1145 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1146 return csp_domain(vb
,rrp
->host
);
1149 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1150 const adns_rr_srvha
*rrp
= datap
;
1153 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1154 return csp_hostaddr(vb
,&rrp
->ha
);
1157 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,int rrsz
,
1158 const struct typeinfo
*typei
) {
1159 /* we treat everything in the array as if it were an adns_rr_srvha
1160 * even though the array might be of adns_rr_srvraw. That's OK
1161 * because they have the same prefix, which is all we access.
1162 * We use rrsz, too, rather than naive array indexing, of course.
1164 char *workbegin
, *workend
, *search
, *arrayend
;
1165 const adns_rr_srvha
*rr
;
1166 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1167 int cpriority
, totalweight
, runtotal
;
1170 assert(rrsz
<= sizeof(rrtmp
));
1171 for (workbegin
= array
, arrayend
= workbegin
+ rrsz
* nrrs
;
1172 workbegin
< arrayend
;
1173 workbegin
= workend
) {
1174 cpriority
= (rr
=(void*)workbegin
)->priority
;
1176 for (workend
= workbegin
, totalweight
= 0;
1177 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1179 totalweight
+= rr
->weight
;
1182 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1183 * cpriority. From now on, workbegin points to the `remaining'
1184 * records: we select one record at a time (RFC2782 `Usage rules'
1185 * and `Format of the SRV RR' subsection `Weight') to place at
1186 * workbegin (swapping with the one that was there, and then
1187 * advance workbegin. */
1189 workbegin
+ rrsz
< workend
; /* don't bother if just one */
1190 workbegin
+= rrsz
) {
1192 randval
= nrand48(ads
->rand48xsubi
);
1193 randval
%= (totalweight
+ 1);
1194 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1195 * totalweight must be <= 2^26 so probability nonuniformity is
1196 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1197 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1200 for (search
=workbegin
, runtotal
=0;
1201 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1203 assert(search
< arrayend
);
1204 totalweight
-= rr
->weight
;
1205 if (search
!= workbegin
) {
1206 memcpy(&rrtmp
, workbegin
, rrsz
);
1207 memcpy(workbegin
, search
, rrsz
);
1208 memcpy(search
, &rrtmp
, rrsz
);
1213 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1214 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1215 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1223 static void mf_byteblock(adns_query qu
, void *datap
) {
1224 adns_rr_byteblock
*rrp
= datap
;
1225 void *bytes
= rrp
->data
;
1226 adns__makefinal_block(qu
,&bytes
,rrp
->len
);
1234 static adns_status
pa_opaque(const parseinfo
*pai
, int cbyte
,
1235 int max
, void *datap
) {
1236 adns_rr_byteblock
*rrp
= datap
;
1238 rrp
->len
= max
- cbyte
;
1239 rrp
->data
= adns__alloc_interim(pai
->qu
, rrp
->len
);
1240 if (!rrp
->data
) R_NOMEM
;
1241 memcpy(rrp
->data
, pai
->dgram
+ cbyte
, rrp
->len
);
1245 static adns_status
cs_opaque(vbuf
*vb
, const void *datap
) {
1246 const adns_rr_byteblock
*rrp
= datap
;
1251 sprintf(buf
,"\\# %d",rrp
->len
);
1254 for (l
= rrp
->len
, p
= rrp
->data
;
1257 sprintf(buf
," %02x%02x%02x%02x",p
[0],p
[1],p
[2],p
[3]);
1263 sprintf(buf
," %02x",*p
);
1273 static void mf_flat(adns_query qu
, void *data
) { }
1279 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1281 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1282 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1283 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1284 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1286 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1287 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1288 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1289 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1294 static const typeinfo typeinfos
[] = {
1295 /* Must be in ascending order of rrtype ! */
1296 /* mem-mgmt code rrt fmt member parser comparer printer */
1298 FLAT_TYPE(a
, "A", 0, inaddr
, inaddr
, inaddr
,inaddr
),
1299 DEEP_TYPE(ns_raw
, "NS", "raw",str
, host_raw
,0, domain
),
1300 DEEP_TYPE(cname
, "CNAME", 0, str
, dom_raw
, 0, domain
),
1301 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, soa
, 0, soa
),
1302 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, host_raw
,0, domain
),
1303 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,hinfo
, 0, hinfo
),
1304 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, mx_raw
, mx_raw
,inthost
),
1305 DEEP_TYPE(txt
, "TXT", 0, manyistr
, txt
, 0, txt
),
1306 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, rp
, 0, rp
),
1307 FLAT_TYPE(aaaa
, "AAAA", 0, in6addr
, in6addr
, in6addr
,in6addr
),
1308 DEEP_TYPE(srv_raw
,"SRV", "raw",srvraw
, srvraw
, srv
, srvraw
,
1309 .checklabel
= ckl_srv
, .postsort
= postsort_srv
),
1311 FLAT_TYPE(addr
, "A", "addr", addr
, addr
, addr
, addr
,
1312 .getrrsz
= gsz_addr
),
1313 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
, hostaddr
,hostaddr
,hostaddr
),
1314 DEEP_TYPE(ptr
, "PTR","checked",str
, ptr
, 0, domain
,
1315 .checklabel
= ckl_ptr
),
1316 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,mx
, mx
, inthostaddr
, ),
1317 DEEP_TYPE(srv
, "SRV","+addr",srvha
, srvha
, srv
, srvha
,
1318 .checklabel
= ckl_srv
, .postsort
= postsort_srv
),
1320 DEEP_TYPE(soa
, "SOA","822", soa
, soa
, 0, soa
),
1321 DEEP_TYPE(rp
, "RP", "822", strpair
, rp
, 0, rp
),
1324 static const typeinfo typeinfo_unknown
=
1325 DEEP_TYPE(unknown
,0, "unknown",byteblock
,opaque
, 0, opaque
);
1327 const typeinfo
*adns__findtype(adns_rrtype type
) {
1328 const typeinfo
*begin
, *end
, *mid
;
1330 if (type
& adns_r_unknown
) return &typeinfo_unknown
;
1331 type
&= adns_rrt_reprmask
;
1333 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1335 while (begin
< end
) {
1336 mid
= begin
+ ((end
-begin
)>>1);
1337 if (mid
->typekey
== type
) return mid
;
1338 if (type
> mid
->typekey
) begin
= mid
+1;