3 * - RR-type-specific code, and the machinery to call it
7 * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
9 * It is part of adns, which is
10 * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
11 * Copyright (C) 1999-2000 Tony Finch <dot@dotat.at>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2, or (at your option)
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software Foundation,
25 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 #include <sys/types.h>
31 #include <sys/socket.h>
32 #include <netinet/in.h>
33 #include <arpa/inet.h>
37 #define R_NOMEM return adns_s_nomemory
38 #define CSP_ADDSTR(s) do { \
39 if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \
46 * _textdata, _qstring (csp)
52 * _addr (pa,di,csp,cs)
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,dip,di)
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
, struct in_addr ad
) {
256 const struct sortlist
*slp
;
259 for (i
=0, slp
=ads
->sortlist
;
261 !((ad
.s_addr
& slp
->mask
.s_addr
) == slp
->base
.s_addr
);
266 static int dip_inaddr(adns_state ads
, struct in_addr a
, struct in_addr b
) {
269 if (!ads
->nsortlist
) return 0;
271 ai
= search_sortlist(ads
,a
);
272 bi
= search_sortlist(ads
,b
);
276 static int di_inaddr(adns_state ads
,
277 const void *datap_a
, const void *datap_b
) {
278 const struct in_addr
*ap
= datap_a
, *bp
= datap_b
;
280 return dip_inaddr(ads
,*ap
,*bp
);
283 static adns_status
cs_inaddr(vbuf
*vb
, const void *datap
) {
284 const struct in_addr
*rrp
= datap
, rr
= *rrp
;
287 ia
= inet_ntoa(rr
); assert(ia
);
293 * _addr (pa,di,csp,cs)
296 static adns_status
pa_addr(const parseinfo
*pai
, int cbyte
,
297 int max
, void *datap
) {
298 adns_rr_addr
*storeto
= datap
;
299 const byte
*dgram
= pai
->dgram
;
301 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
302 storeto
->len
= sizeof(storeto
->addr
.inet
);
303 memset(&storeto
->addr
,0,sizeof(storeto
->addr
.inet
));
304 storeto
->addr
.inet
.sin_family
= AF_INET
;
305 memcpy(&storeto
->addr
.inet
.sin_addr
,dgram
+cbyte
,4);
309 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
310 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
312 assert(ap
->addr
.sa
.sa_family
== AF_INET
);
313 return dip_inaddr(ads
, ap
->addr
.inet
.sin_addr
, bp
->addr
.inet
.sin_addr
);
316 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
317 const adns_state ads
= context
;
319 return di_addr(ads
, datap_a
, datap_b
);
322 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
326 switch (rrp
->addr
.inet
.sin_family
) {
329 ia
= inet_ntoa(rrp
->addr
.inet
.sin_addr
); assert(ia
);
333 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
340 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
341 const adns_rr_addr
*rrp
= datap
;
343 return csp_addr(vb
,rrp
);
347 * _domain (pap,csp,cs)
351 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
352 char **domain_r
, parsedomain_flags flags
) {
356 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
357 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
359 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
361 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
364 dm
[pai
->qu
->vb
.used
]= 0;
365 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
371 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
373 if (!*domain
) CSP_ADDSTR(".");
377 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
378 const char *const *domainp
= datap
;
379 return csp_domain(vb
,*domainp
);
382 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
383 int max
, void *datap
) {
387 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
390 if (cbyte
!= max
) return adns_s_invaliddata
;
398 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
399 int max
, void *datap
) {
403 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
404 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
407 if (cbyte
!= max
) return adns_s_invaliddata
;
412 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
415 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
416 int *cbyte_io
, int count
, int dmstart
) {
418 int type
, class, rdlen
, rdstart
, ownermatched
;
422 for (rri
=0, naddrs
=-1; rri
<count
; rri
++) {
423 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
424 pai
->dglen
, cbyte_io
,
425 &type
, &class, &ttl
, &rdlen
, &rdstart
,
426 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
428 if (!ownermatched
|| class != DNS_CLASS_IN
|| type
!= adns_r_a
) {
429 if (naddrs
>0) break; else continue;
434 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*sizeof(adns_rr_addr
)))
436 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
437 st
= pa_addr(pai
, rdstart
,rdstart
+rdlen
,
438 pai
->qu
->vb
.buf
+ naddrs
*sizeof(adns_rr_addr
));
443 ha
->addrs
= adns__alloc_interim(pai
->qu
, naddrs
*sizeof(adns_rr_addr
));
444 if (!ha
->addrs
) R_NOMEM
;
445 memcpy(ha
->addrs
, pai
->qu
->vb
.buf
, naddrs
*sizeof(adns_rr_addr
));
447 ha
->astatus
= adns_s_ok
;
449 adns__isort(ha
->addrs
, naddrs
, sizeof(adns_rr_addr
), pai
->qu
->vb
.buf
,
455 static void icb_hostaddr(adns_query parent
, adns_query child
) {
456 adns_answer
*cans
= child
->answer
;
457 adns_rr_hostaddr
*rrp
= child
->ctx
.info
.hostaddr
;
458 adns_state ads
= parent
->ads
;
463 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : cans
->nrrs
;
464 rrp
->addrs
= cans
->rrs
.addr
;
465 adns__transfer_interim(child
, parent
, rrp
->addrs
,
466 rrp
->naddrs
*sizeof(adns_rr_addr
));
468 if (parent
->children
.head
) {
469 LIST_LINK_TAIL(ads
->childw
,parent
);
471 adns__query_done(parent
);
475 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
476 int max
, adns_rr_hostaddr
*rrp
) {
482 adns_queryflags nflags
;
484 dmstart
= cbyte
= *cbyte_io
;
485 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
486 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
490 rrp
->astatus
= adns_s_ok
;
496 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->nscount
, dmstart
);
498 if (rrp
->naddrs
!= -1) return adns_s_ok
;
500 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->arcount
, dmstart
);
502 if (rrp
->naddrs
!= -1) return adns_s_ok
;
504 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
505 pai
->dgram
, pai
->dglen
, dmstart
,
506 adns_r_addr
, adns_qf_quoteok_query
);
510 ctx
.callback
= icb_hostaddr
;
511 ctx
.info
.hostaddr
= rrp
;
513 nflags
= adns_qf_quoteok_query
;
514 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
516 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(adns_r_addr
),
517 &pai
->qu
->vb
, id
, nflags
, pai
->now
, &ctx
);
520 nqu
->parent
= pai
->qu
;
521 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
526 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
527 int max
, void *datap
) {
528 adns_rr_hostaddr
*rrp
= datap
;
531 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
533 if (cbyte
!= max
) return adns_s_invaliddata
;
538 static int dip_hostaddr(adns_state ads
,
539 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
540 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
541 if (ap
->astatus
) return 0;
543 assert(ap
->addrs
[0].addr
.sa
.sa_family
== AF_INET
);
544 assert(bp
->addrs
[0].addr
.sa
.sa_family
== AF_INET
);
545 return dip_inaddr(ads
,
546 ap
->addrs
[0].addr
.inet
.sin_addr
,
547 bp
->addrs
[0].addr
.inet
.sin_addr
);
550 static int di_hostaddr(adns_state ads
,
551 const void *datap_a
, const void *datap_b
) {
552 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
554 return dip_hostaddr(ads
, ap
,bp
);
557 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
560 adns__makefinal_str(qu
,&rrp
->host
);
562 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*sizeof(*rrp
->addrs
));
566 static void mf_hostaddr(adns_query qu
, void *datap
) {
567 adns_rr_hostaddr
*rrp
= datap
;
569 mfp_hostaddr(qu
,rrp
);
572 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
578 st
= csp_domain(vb
,rrp
->host
); if (st
) return st
;
581 CSP_ADDSTR(adns_errtypeabbrev(rrp
->astatus
));
583 sprintf(buf
," %d ",rrp
->astatus
);
586 CSP_ADDSTR(adns_errabbrev(rrp
->astatus
));
589 errstr
= adns_strerror(rrp
->astatus
);
590 st
= csp_qstring(vb
,errstr
,strlen(errstr
)); if (st
) return st
;
592 if (rrp
->naddrs
>= 0) {
594 for (i
=0; i
<rrp
->naddrs
; i
++) {
596 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
605 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
606 const adns_rr_hostaddr
*rrp
= datap
;
608 return csp_hostaddr(vb
,rrp
);
615 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
,
616 int max
, void *datap
) {
617 const byte
*dgram
= pai
->dgram
;
618 adns_rr_intstr
*rrp
= datap
;
622 if (cbyte
+2 > max
) return adns_s_invaliddata
;
625 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
626 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
629 if (cbyte
!= max
) return adns_s_invaliddata
;
633 static int di_mx_raw(adns_state ads
, const void *datap_a
, const void *datap_b
) {
634 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
636 if (ap
->i
< bp
->i
) return 0;
637 if (ap
->i
> bp
->i
) return 1;
645 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
,
646 int max
, void *datap
) {
647 const byte
*dgram
= pai
->dgram
;
648 adns_rr_inthostaddr
*rrp
= datap
;
652 if (cbyte
+2 > max
) return adns_s_invaliddata
;
655 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
658 if (cbyte
!= max
) return adns_s_invaliddata
;
662 static int di_mx(adns_state ads
, const void *datap_a
, const void *datap_b
) {
663 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
665 if (ap
->i
< bp
->i
) return 0;
666 if (ap
->i
> bp
->i
) return 1;
667 return dip_hostaddr(ads
, &ap
->ha
, &bp
->ha
);
671 * _inthostaddr (mf,cs)
674 static void mf_inthostaddr(adns_query qu
, void *datap
) {
675 adns_rr_inthostaddr
*rrp
= datap
;
677 mfp_hostaddr(qu
,&rrp
->ha
);
680 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
681 const adns_rr_inthostaddr
*rrp
= datap
;
684 sprintf(buf
,"%u ",rrp
->i
);
687 return csp_hostaddr(vb
,&rrp
->ha
);
694 static adns_status
cs_inthost(vbuf
*vb
, const void *datap
) {
695 const adns_rr_intstr
*rrp
= datap
;
698 sprintf(buf
,"%u ",rrp
->i
);
700 return csp_domain(vb
,rrp
->str
);
704 * _ptr (pa, +icb_ptr)
707 static void icb_ptr(adns_query parent
, adns_query child
) {
708 adns_answer
*cans
= child
->answer
;
709 const adns_rr_addr
*queried
, *found
;
710 adns_state ads
= parent
->ads
;
713 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
714 adns__query_fail(parent
,adns_s_inconsistent
);
716 } else if (cans
->status
) {
717 adns__query_fail(parent
,cans
->status
);
721 queried
= &parent
->ctx
.info
.ptr_parent_addr
;
722 for (i
=0, found
=cans
->rrs
.addr
; i
<cans
->nrrs
; i
++, found
++) {
723 if (queried
->len
== found
->len
&&
724 !memcmp(&queried
->addr
,&found
->addr
,queried
->len
)) {
725 if (!parent
->children
.head
) {
726 adns__query_done(parent
);
729 LIST_LINK_TAIL(ads
->childw
,parent
);
735 adns__query_fail(parent
,adns_s_inconsistent
);
738 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
739 int max
, void *datap
) {
740 static const char *(expectdomain
[])= { DNS_INADDR_ARPA
};
749 int cbyte
, i
, lablen
, labstart
, l
, id
;
754 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
755 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
757 if (cbyte
!= max
) return adns_s_invaliddata
;
759 ap
= &pai
->qu
->ctx
.info
.ptr_parent_addr
;
761 adns__findlabel_start(&fls
, pai
->ads
, -1, pai
->qu
,
762 pai
->qu
->query_dgram
, pai
->qu
->query_dglen
,
763 pai
->qu
->query_dglen
, DNS_HDRSIZE
, 0);
764 for (i
=0; i
<4; i
++) {
765 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
); assert(!st
);
766 if (lablen
<=0 || lablen
>3) return adns_s_querydomainwrong
;
767 memcpy(labbuf
, pai
->qu
->query_dgram
+ labstart
, lablen
);
769 ipv
[3-i
]= strtoul(labbuf
,&ep
,10);
770 if (*ep
) return adns_s_querydomainwrong
;
771 if (lablen
>1 && pai
->qu
->query_dgram
[labstart
]=='0')
772 return adns_s_querydomainwrong
;
774 for (i
=0; i
<sizeof(expectdomain
)/sizeof(*expectdomain
); i
++) {
775 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
); assert(!st
);
776 l
= strlen(expectdomain
[i
]);
778 memcmp(pai
->qu
->query_dgram
+ labstart
, expectdomain
[i
], l
))
779 return adns_s_querydomainwrong
;
781 st
= adns__findlabel_next(&fls
,&lablen
,0); assert(!st
);
782 if (lablen
) return adns_s_querydomainwrong
;
784 ap
->len
= sizeof(struct sockaddr_in
);
785 memset(&ap
->addr
,0,sizeof(ap
->addr
.inet
));
786 ap
->addr
.inet
.sin_family
= AF_INET
;
787 ap
->addr
.inet
.sin_addr
.s_addr
=
788 htonl((ipv
[0]<<24) | (ipv
[1]<<16) | (ipv
[2]<<8) | (ipv
[3]));
791 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
792 pai
->dgram
, pai
->dglen
, dmstart
,
793 adns_r_addr
, adns_qf_quoteok_query
);
797 ctx
.callback
= icb_ptr
;
798 memset(&ctx
.info
,0,sizeof(ctx
.info
));
799 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(adns_r_addr
),
801 adns_qf_quoteok_query
, pai
->now
, &ctx
);
804 nqu
->parent
= pai
->qu
;
805 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
813 static void mf_strpair(adns_query qu
, void *datap
) {
814 adns_rr_strpair
*rrp
= datap
;
816 adns__makefinal_str(qu
,&rrp
->array
[0]);
817 adns__makefinal_str(qu
,&rrp
->array
[1]);
824 static void mf_intstrpair(adns_query qu
, void *datap
) {
825 adns_rr_intstrpair
*rrp
= datap
;
827 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
828 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
835 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
836 int max
, void *datap
) {
837 adns_rr_intstrpair
*rrp
= datap
;
841 for (i
=0; i
<2; i
++) {
842 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
846 if (cbyte
!= max
) return adns_s_invaliddata
;
855 static adns_status
pap_mailbox822(const parseinfo
*pai
,
856 int *cbyte_io
, int max
, char **mb_r
) {
857 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
858 const unsigned char *p
;
866 adns__findlabel_start(&fls
, pai
->ads
,
868 pai
->dgram
, pai
->dglen
, max
,
869 *cbyte_io
, cbyte_io
);
870 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
872 adns__vbuf_appendstr(vb
,".");
877 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
879 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
880 if (c
== '.' && !neednorm
) neednorm
= 1;
881 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
885 if (needquote
|| neednorm
) {
886 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
887 adns__vbuf_appendq(vb
,"\"",1);
888 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
890 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
891 adns__vbuf_appendq(vb
,p
,1);
893 adns__vbuf_appendq(vb
,"\"",1);
895 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
898 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
900 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
904 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
905 memcpy(str
,vb
->buf
,vb
->used
);
911 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
913 if (pai
->qu
->typei
->typekey
& adns__qtf_mail822
) {
914 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
916 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
920 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
921 return csp_domain(vb
,mailbox
);
928 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
929 int max
, void *datap
) {
930 adns_rr_strpair
*rrp
= datap
;
933 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
936 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
939 if (cbyte
!= max
) return adns_s_invaliddata
;
943 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
944 const adns_rr_strpair
*rrp
= datap
;
947 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
949 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
958 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
959 int max
, void *datap
) {
960 adns_rr_soa
*rrp
= datap
;
961 const byte
*dgram
= pai
->dgram
;
965 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
966 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
969 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
972 if (cbyte
+20 != max
) return adns_s_invaliddata
;
974 for (i
=0; i
<5; i
++) {
977 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
983 static void mf_soa(adns_query qu
, void *datap
) {
984 adns_rr_soa
*rrp
= datap
;
986 adns__makefinal_str(qu
,&rrp
->mname
);
987 adns__makefinal_str(qu
,&rrp
->rname
);
990 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
991 const adns_rr_soa
*rrp
= datap
;
996 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
998 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
1000 for (i
=0; i
<5; i
++) {
1001 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1009 * _srv* (pa*2,di,cs*2,qdpl,postsort)
1012 static adns_status
qdpl_srv(adns_state ads
,
1013 const char **p_io
, const char *pe
, int labelnum
,
1014 char label_r
[DNS_MAXDOMAIN
], int *ll_io
,
1015 adns_queryflags flags
,
1016 const typeinfo
*typei
) {
1021 if (labelnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1022 useflags
= adns_qf_quoteok_query
;
1028 st
= adns__qdpl_normal(ads
, p_io
,pe
, labelnum
,label_r
, ll_io
, useflags
,typei
);
1033 if (!ll
|| label_r
[0]!='_')
1034 return adns_s_querydomaininvalid
;
1035 if (memchr(p_orig
+1, '\\', pe
- (p_orig
+1)))
1036 return adns_s_querydomaininvalid
;
1041 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1043 /* might be adns_rr_srvraw* */) {
1044 const byte
*dgram
= pai
->dgram
;
1048 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1050 rrp
->priority
= GET_W(cbyte
, ti
);
1051 rrp
->weight
= GET_W(cbyte
, ti
);
1052 rrp
->port
= GET_W(cbyte
, ti
);
1056 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1057 int max
, void *datap
) {
1058 adns_rr_srvraw
*rrp
= datap
;
1061 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1064 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1065 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1068 if (cbyte
!= max
) return adns_s_invaliddata
;
1072 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1073 int max
, void *datap
) {
1074 adns_rr_srvha
*rrp
= datap
;
1077 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1078 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1079 if (cbyte
!= max
) return adns_s_invaliddata
;
1083 static void mf_srvraw(adns_query qu
, void *datap
) {
1084 adns_rr_srvraw
*rrp
= datap
;
1085 adns__makefinal_str(qu
, &rrp
->host
);
1088 static void mf_srvha(adns_query qu
, void *datap
) {
1089 adns_rr_srvha
*rrp
= datap
;
1090 mfp_hostaddr(qu
,&rrp
->ha
);
1093 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1094 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1095 /* might be const adns_rr_svhostaddr* */
1097 if (ap
->priority
< bp
->priority
) return 0;
1098 if (ap
->priority
> bp
->priority
) return 1;
1102 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1103 /* might be adns_rr_srvraw* */) {
1105 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1110 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1111 const adns_rr_srvraw
*rrp
= datap
;
1114 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1115 return csp_domain(vb
,rrp
->host
);
1118 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1119 const adns_rr_srvha
*rrp
= datap
;
1122 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1123 return csp_hostaddr(vb
,&rrp
->ha
);
1126 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,
1127 const struct typeinfo
*typei
) {
1128 /* we treat everything in the array as if it were an adns_rr_srvha
1129 * even though the array might be of adns_rr_srvraw. That's OK
1130 * because they have the same prefix, which is all we access.
1131 * We use typei->rrsz, too, rather than naive array indexing, of course.
1133 char *workbegin
, *workend
, *search
, *arrayend
;
1134 const adns_rr_srvha
*rr
;
1135 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1136 int cpriority
, totalweight
, runtotal
;
1139 for (workbegin
= array
, arrayend
= workbegin
+ typei
->rrsz
* nrrs
;
1140 workbegin
< arrayend
;
1141 workbegin
= workend
) {
1142 cpriority
= (rr
=(void*)workbegin
)->priority
;
1144 for (workend
= workbegin
, totalweight
= 0;
1145 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1146 workend
+= typei
->rrsz
) {
1147 totalweight
+= rr
->weight
;
1150 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1151 * cpriority. From now on, workbegin points to the `remaining'
1152 * records: we select one record at a time (RFC2782 `Usage rules'
1153 * and `Format of the SRV RR' subsection `Weight') to place at
1154 * workbegin (swapping with the one that was there, and then
1155 * advance workbegin. */
1157 workbegin
+ typei
->rrsz
< workend
; /* don't bother if just one */
1158 workbegin
+= typei
->rrsz
) {
1160 randval
= nrand48(ads
->rand48xsubi
);
1161 randval
%= (totalweight
+ 1);
1162 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1163 * totalweight must be <= 2^26 so probability nonuniformity is
1164 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1165 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1168 for (search
=workbegin
, runtotal
=0;
1169 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1170 search
+= typei
->rrsz
);
1171 assert(search
< arrayend
);
1172 totalweight
-= rr
->weight
;
1173 if (search
!= workbegin
) {
1174 memcpy(&rrtmp
, workbegin
, typei
->rrsz
);
1175 memcpy(workbegin
, search
, typei
->rrsz
);
1176 memcpy(search
, &rrtmp
, typei
->rrsz
);
1181 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1182 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1183 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1191 static void mf_byteblock(adns_query qu
, void *datap
) {
1192 adns_rr_byteblock
*rrp
= datap
;
1193 void *bytes
= rrp
->data
;
1194 adns__makefinal_block(qu
,&bytes
,rrp
->len
);
1202 static adns_status
pa_opaque(const parseinfo
*pai
, int cbyte
,
1203 int max
, void *datap
) {
1204 adns_rr_byteblock
*rrp
= datap
;
1206 rrp
->len
= max
- cbyte
;
1207 rrp
->data
= adns__alloc_interim(pai
->qu
, rrp
->len
);
1208 if (!rrp
->data
) R_NOMEM
;
1209 memcpy(rrp
->data
, pai
->dgram
+ cbyte
, rrp
->len
);
1213 static adns_status
cs_opaque(vbuf
*vb
, const void *datap
) {
1214 const adns_rr_byteblock
*rrp
= datap
;
1219 sprintf(buf
,"\\# %d",rrp
->len
);
1222 for (l
= rrp
->len
, p
= rrp
->data
;
1225 sprintf(buf
," %02x%02x%02x%02x",p
[0],p
[1],p
[2],p
[3]);
1231 sprintf(buf
," %02x",*p
);
1241 static void mf_flat(adns_query qu
, void *data
) { }
1247 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1249 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
1250 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
1252 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1253 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1254 printer,parser,comparer, adns__qdpl_normal,0 }
1255 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1256 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1257 printer,parser,comparer, adns__qdpl_normal,0 }
1258 #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer,qdpl,postsort) \
1259 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1260 printer,parser,comparer,qdpl,postsort }
1262 static const typeinfo typeinfos
[] = {
1263 /* Must be in ascending order of rrtype ! */
1264 /* mem-mgmt code rrt fmt member parser comparer printer */
1266 FLAT_TYPE(a
, "A", 0, inaddr
, pa_inaddr
, di_inaddr
,cs_inaddr
),
1267 DEEP_TYPE(ns_raw
, "NS", "raw",str
, pa_host_raw
,0, cs_domain
),
1268 DEEP_TYPE(cname
, "CNAME", 0, str
, pa_dom_raw
, 0, cs_domain
),
1269 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, pa_soa
, 0, cs_soa
),
1270 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, pa_host_raw
,0, cs_domain
),
1271 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,pa_hinfo
, 0, cs_hinfo
),
1272 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, pa_mx_raw
, di_mx_raw
,cs_inthost
),
1273 DEEP_TYPE(txt
, "TXT", 0, manyistr
,pa_txt
, 0, cs_txt
),
1274 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, pa_rp
, 0, cs_rp
),
1275 XTRA_TYPE(srv_raw
,"SRV", "raw",srvraw
, pa_srvraw
, di_srv
, cs_srvraw
,
1276 qdpl_srv
, postsort_srv
),
1278 FLAT_TYPE(addr
, "A", "addr", addr
, pa_addr
, di_addr
, cs_addr
),
1279 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
,pa_hostaddr
,di_hostaddr
,cs_hostaddr
),
1280 DEEP_TYPE(ptr
, "PTR","checked",str
, pa_ptr
, 0, cs_domain
),
1281 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,pa_mx
, di_mx
, cs_inthostaddr
),
1282 XTRA_TYPE(srv
, "SRV","+addr",srvha
, pa_srvha
, di_srv
, cs_srvha
,
1283 qdpl_srv
, postsort_srv
),
1285 DEEP_TYPE(soa
, "SOA","822", soa
, pa_soa
, 0, cs_soa
),
1286 DEEP_TYPE(rp
, "RP", "822", strpair
, pa_rp
, 0, cs_rp
),
1289 static const typeinfo typeinfo_unknown
=
1290 DEEP_TYPE(unknown
,0, "unknown",byteblock
,pa_opaque
, 0, cs_opaque
);
1292 const typeinfo
*adns__findtype(adns_rrtype type
) {
1293 const typeinfo
*begin
, *end
, *mid
;
1295 if (type
& adns_r_unknown
) return &typeinfo_unknown
;
1297 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1299 while (begin
< end
) {
1300 mid
= begin
+ ((end
-begin
)>>1);
1301 if (mid
->typekey
== type
) return mid
;
1302 if (type
> mid
->typekey
) begin
= mid
+1;