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 * _addr (pa,di,csp,cs)
54 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
57 * _inthostaddr (mf,cs)
62 * _mailbox (pap +pap_mailbox822)
65 * _srv* (qdpl,(pap),pa,mf,di,(csp),cs,postsort)
70 * within each section:
87 static adns_status
pap_qstring(const parseinfo
*pai
, int *cbyte_io
, int max
,
88 int *len_r
, char **str_r
) {
89 /* Neither len_r nor str_r may be null.
90 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
92 const byte
*dgram
= pai
->dgram
;
98 if (cbyte
>= max
) return adns_s_invaliddata
;
100 if (cbyte
+l
> max
) return adns_s_invaliddata
;
102 str
= adns__alloc_interim(pai
->qu
, l
+1);
106 memcpy(str
,dgram
+cbyte
,l
);
115 static adns_status
csp_qstring(vbuf
*vb
, const char *dp
, int len
) {
121 for (cn
=0; cn
<len
; cn
++) {
125 } else if (ch
== '"') {
127 } else if (ch
>= 32 && ch
<= 126) {
128 if (!adns__vbuf_append(vb
,&ch
,1)) R_NOMEM
;
130 sprintf(buf
,"\\x%02x",ch
);
143 static void mf_str(adns_query qu
, void *datap
) {
146 adns__makefinal_str(qu
,rrp
);
153 static void mf_intstr(adns_query qu
, void *datap
) {
154 adns_rr_intstr
*rrp
= datap
;
156 adns__makefinal_str(qu
,&rrp
->str
);
163 static void mf_manyistr(adns_query qu
, void *datap
) {
164 adns_rr_intstr
**rrp
= datap
;
165 adns_rr_intstr
*te
, *table
;
169 for (tc
=0, te
= *rrp
; te
->i
>= 0; te
++, tc
++);
171 adns__makefinal_block(qu
,&tablev
,sizeof(*te
)*(tc
+1));
173 for (te
= *rrp
; te
->i
>= 0; te
++)
174 adns__makefinal_str(qu
,&te
->str
);
181 static adns_status
pa_txt(const parseinfo
*pai
, int cbyte
,
182 int max
, void *datap
) {
183 adns_rr_intstr
**rrp
= datap
, *table
, *te
;
184 const byte
*dgram
= pai
->dgram
;
185 int ti
, tc
, l
, startbyte
;
189 if (cbyte
>= max
) return adns_s_invaliddata
;
191 while (cbyte
< max
) {
196 if (cbyte
!= max
|| !tc
) return adns_s_invaliddata
;
198 table
= adns__alloc_interim(pai
->qu
,sizeof(*table
)*(tc
+1));
201 for (cbyte
=startbyte
, ti
=0, te
=table
; ti
<tc
; ti
++, te
++) {
202 st
= pap_qstring(pai
, &cbyte
, max
, &te
->i
, &te
->str
);
205 assert(cbyte
== max
);
214 static adns_status
cs_txt(vbuf
*vb
, const void *datap
) {
215 const adns_rr_intstr
*const *rrp
= datap
;
216 const adns_rr_intstr
*current
;
220 for (current
= *rrp
, spc
=0; current
->i
>= 0; current
++, spc
=1) {
221 if (spc
) CSP_ADDSTR(" ");
222 st
= csp_qstring(vb
,current
->str
,current
->i
); if (st
) return st
;
231 static adns_status
cs_hinfo(vbuf
*vb
, const void *datap
) {
232 const adns_rr_intstrpair
*rrp
= datap
;
235 st
= csp_qstring(vb
,rrp
->array
[0].str
,rrp
->array
[0].i
); if (st
) return st
;
237 st
= csp_qstring(vb
,rrp
->array
[1].str
,rrp
->array
[1].i
); if (st
) return st
;
242 * _inaddr (pa,dip,di)
245 static adns_status
pa_inaddr(const parseinfo
*pai
, int cbyte
,
246 int max
, void *datap
) {
247 struct in_addr
*storeto
= datap
;
249 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
250 memcpy(storeto
, pai
->dgram
+ cbyte
, 4);
254 static int search_sortlist(adns_state ads
, struct in_addr ad
) {
255 const struct sortlist
*slp
;
258 for (i
=0, slp
=ads
->sortlist
;
260 !((ad
.s_addr
& slp
->mask
.s_addr
) == slp
->base
.s_addr
);
265 static int dip_inaddr(adns_state ads
, struct in_addr a
, struct in_addr b
) {
268 if (!ads
->nsortlist
) return 0;
270 ai
= search_sortlist(ads
,a
);
271 bi
= search_sortlist(ads
,b
);
275 static int di_inaddr(adns_state ads
,
276 const void *datap_a
, const void *datap_b
) {
277 const struct in_addr
*ap
= datap_a
, *bp
= datap_b
;
279 return dip_inaddr(ads
,*ap
,*bp
);
282 static adns_status
cs_inaddr(vbuf
*vb
, const void *datap
) {
283 const struct in_addr
*rrp
= datap
, rr
= *rrp
;
286 ia
= inet_ntoa(rr
); assert(ia
);
292 * _addr (pa,di,csp,cs)
295 static adns_status
pa_addr(const parseinfo
*pai
, int cbyte
,
296 int max
, void *datap
) {
297 adns_rr_addr
*storeto
= datap
;
298 const byte
*dgram
= pai
->dgram
;
300 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
301 storeto
->len
= sizeof(storeto
->addr
.inet
);
302 memset(&storeto
->addr
,0,sizeof(storeto
->addr
.inet
));
303 storeto
->addr
.inet
.sin_family
= AF_INET
;
304 memcpy(&storeto
->addr
.inet
.sin_addr
,dgram
+cbyte
,4);
308 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
309 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
311 assert(ap
->addr
.sa
.sa_family
== AF_INET
);
312 return dip_inaddr(ads
, ap
->addr
.inet
.sin_addr
, bp
->addr
.inet
.sin_addr
);
315 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
316 const adns_state ads
= context
;
318 return di_addr(ads
, datap_a
, datap_b
);
321 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
325 switch (rrp
->addr
.inet
.sin_family
) {
328 ia
= inet_ntoa(rrp
->addr
.inet
.sin_addr
); assert(ia
);
332 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
339 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
340 const adns_rr_addr
*rrp
= datap
;
342 return csp_addr(vb
,rrp
);
346 * _domain (pap,csp,cs)
350 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
351 char **domain_r
, parsedomain_flags flags
) {
355 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
356 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
358 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
360 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
363 dm
[pai
->qu
->vb
.used
]= 0;
364 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
370 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
372 if (!*domain
) CSP_ADDSTR(".");
376 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
377 const char *const *domainp
= datap
;
378 return csp_domain(vb
,*domainp
);
381 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
382 int max
, void *datap
) {
386 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
389 if (cbyte
!= max
) return adns_s_invaliddata
;
397 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
398 int max
, void *datap
) {
402 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
403 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
406 if (cbyte
!= max
) return adns_s_invaliddata
;
411 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
414 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
415 int *cbyte_io
, int count
, int dmstart
) {
417 int type
, class, rdlen
, rdstart
, ownermatched
;
421 for (rri
=0, naddrs
=-1; rri
<count
; rri
++) {
422 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
423 pai
->dglen
, cbyte_io
,
424 &type
, &class, &ttl
, &rdlen
, &rdstart
,
425 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
427 if (!ownermatched
|| class != DNS_CLASS_IN
|| type
!= adns_r_a
) {
428 if (naddrs
>0) break; else continue;
433 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*sizeof(adns_rr_addr
)))
435 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
436 st
= pa_addr(pai
, rdstart
,rdstart
+rdlen
,
437 pai
->qu
->vb
.buf
+ naddrs
*sizeof(adns_rr_addr
));
442 ha
->addrs
= adns__alloc_interim(pai
->qu
, naddrs
*sizeof(adns_rr_addr
));
443 if (!ha
->addrs
) R_NOMEM
;
444 memcpy(ha
->addrs
, pai
->qu
->vb
.buf
, naddrs
*sizeof(adns_rr_addr
));
446 ha
->astatus
= adns_s_ok
;
448 adns__isort(ha
->addrs
, naddrs
, sizeof(adns_rr_addr
), pai
->qu
->vb
.buf
,
454 static void icb_hostaddr(adns_query parent
, adns_query child
) {
455 adns_answer
*cans
= child
->answer
;
456 adns_rr_hostaddr
*rrp
= child
->ctx
.info
.hostaddr
;
457 adns_state ads
= parent
->ads
;
462 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : cans
->nrrs
;
463 rrp
->addrs
= cans
->rrs
.addr
;
464 adns__transfer_interim(child
, parent
, rrp
->addrs
,
465 rrp
->naddrs
*sizeof(adns_rr_addr
));
467 if (parent
->children
.head
) {
468 LIST_LINK_TAIL(ads
->childw
,parent
);
470 adns__query_done(parent
);
474 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
475 int max
, adns_rr_hostaddr
*rrp
) {
481 adns_queryflags nflags
;
483 dmstart
= cbyte
= *cbyte_io
;
484 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
485 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
489 rrp
->astatus
= adns_s_ok
;
495 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->nscount
, dmstart
);
497 if (rrp
->naddrs
!= -1) return adns_s_ok
;
499 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->arcount
, dmstart
);
501 if (rrp
->naddrs
!= -1) return adns_s_ok
;
503 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
504 pai
->dgram
, pai
->dglen
, dmstart
,
505 adns_r_addr
, adns_qf_quoteok_query
);
509 ctx
.callback
= icb_hostaddr
;
510 ctx
.info
.hostaddr
= rrp
;
512 nflags
= adns_qf_quoteok_query
;
513 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
515 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(adns_r_addr
),
516 &pai
->qu
->vb
, id
, nflags
, pai
->now
, &ctx
);
519 nqu
->parent
= pai
->qu
;
520 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
525 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
526 int max
, void *datap
) {
527 adns_rr_hostaddr
*rrp
= datap
;
530 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
532 if (cbyte
!= max
) return adns_s_invaliddata
;
537 static int dip_hostaddr(adns_state ads
,
538 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
539 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
540 if (ap
->astatus
) return 0;
542 assert(ap
->addrs
[0].addr
.sa
.sa_family
== AF_INET
);
543 assert(bp
->addrs
[0].addr
.sa
.sa_family
== AF_INET
);
544 return dip_inaddr(ads
,
545 ap
->addrs
[0].addr
.inet
.sin_addr
,
546 bp
->addrs
[0].addr
.inet
.sin_addr
);
549 static int di_hostaddr(adns_state ads
,
550 const void *datap_a
, const void *datap_b
) {
551 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
553 return dip_hostaddr(ads
, ap
,bp
);
556 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
559 adns__makefinal_str(qu
,&rrp
->host
);
561 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*sizeof(*rrp
->addrs
));
565 static void mf_hostaddr(adns_query qu
, void *datap
) {
566 adns_rr_hostaddr
*rrp
= datap
;
568 mfp_hostaddr(qu
,rrp
);
571 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
577 st
= csp_domain(vb
,rrp
->host
); if (st
) return st
;
580 CSP_ADDSTR(adns_errtypeabbrev(rrp
->astatus
));
582 sprintf(buf
," %d ",rrp
->astatus
);
585 CSP_ADDSTR(adns_errabbrev(rrp
->astatus
));
588 errstr
= adns_strerror(rrp
->astatus
);
589 st
= csp_qstring(vb
,errstr
,strlen(errstr
)); if (st
) return st
;
591 if (rrp
->naddrs
>= 0) {
593 for (i
=0; i
<rrp
->naddrs
; i
++) {
595 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
604 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
605 const adns_rr_hostaddr
*rrp
= datap
;
607 return csp_hostaddr(vb
,rrp
);
614 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
,
615 int max
, void *datap
) {
616 const byte
*dgram
= pai
->dgram
;
617 adns_rr_intstr
*rrp
= datap
;
621 if (cbyte
+2 > max
) return adns_s_invaliddata
;
624 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
625 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
628 if (cbyte
!= max
) return adns_s_invaliddata
;
632 static int di_mx_raw(adns_state ads
, const void *datap_a
, const void *datap_b
) {
633 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
635 if (ap
->i
< bp
->i
) return 0;
636 if (ap
->i
> bp
->i
) return 1;
644 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
,
645 int max
, void *datap
) {
646 const byte
*dgram
= pai
->dgram
;
647 adns_rr_inthostaddr
*rrp
= datap
;
651 if (cbyte
+2 > max
) return adns_s_invaliddata
;
654 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
657 if (cbyte
!= max
) return adns_s_invaliddata
;
661 static int di_mx(adns_state ads
, const void *datap_a
, const void *datap_b
) {
662 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
664 if (ap
->i
< bp
->i
) return 0;
665 if (ap
->i
> bp
->i
) return 1;
666 return dip_hostaddr(ads
, &ap
->ha
, &bp
->ha
);
670 * _inthostaddr (mf,cs)
673 static void mf_inthostaddr(adns_query qu
, void *datap
) {
674 adns_rr_inthostaddr
*rrp
= datap
;
676 mfp_hostaddr(qu
,&rrp
->ha
);
679 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
680 const adns_rr_inthostaddr
*rrp
= datap
;
683 sprintf(buf
,"%u ",rrp
->i
);
686 return csp_hostaddr(vb
,&rrp
->ha
);
693 static adns_status
cs_inthost(vbuf
*vb
, const void *datap
) {
694 const adns_rr_intstr
*rrp
= datap
;
697 sprintf(buf
,"%u ",rrp
->i
);
699 return csp_domain(vb
,rrp
->str
);
703 * _ptr (pa, +icb_ptr)
706 static void icb_ptr(adns_query parent
, adns_query child
) {
707 adns_answer
*cans
= child
->answer
;
708 const adns_rr_addr
*queried
, *found
;
709 adns_state ads
= parent
->ads
;
712 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
713 adns__query_fail(parent
,adns_s_inconsistent
);
715 } else if (cans
->status
) {
716 adns__query_fail(parent
,cans
->status
);
720 queried
= &parent
->ctx
.info
.ptr_parent_addr
;
721 for (i
=0, found
=cans
->rrs
.addr
; i
<cans
->nrrs
; i
++, found
++) {
722 if (queried
->len
== found
->len
&&
723 !memcmp(&queried
->addr
,&found
->addr
,queried
->len
)) {
724 if (!parent
->children
.head
) {
725 adns__query_done(parent
);
728 LIST_LINK_TAIL(ads
->childw
,parent
);
734 adns__query_fail(parent
,adns_s_inconsistent
);
737 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
738 int max
, void *datap
) {
739 static const char *const (expectdomain
[])= { DNS_INADDR_ARPA
};
748 int cbyte
, i
, lablen
, labstart
, l
, id
;
753 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
754 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
756 if (cbyte
!= max
) return adns_s_invaliddata
;
758 ap
= &pai
->qu
->ctx
.info
.ptr_parent_addr
;
760 adns__findlabel_start(&fls
, pai
->ads
, -1, pai
->qu
,
761 pai
->qu
->query_dgram
, pai
->qu
->query_dglen
,
762 pai
->qu
->query_dglen
, DNS_HDRSIZE
, 0);
763 for (i
=0; i
<4; i
++) {
764 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
); assert(!st
);
765 if (lablen
<=0 || lablen
>3) return adns_s_querydomainwrong
;
766 memcpy(labbuf
, pai
->qu
->query_dgram
+ labstart
, lablen
);
768 ipv
[3-i
]= strtoul(labbuf
,&ep
,10);
769 if (*ep
) return adns_s_querydomainwrong
;
770 if (lablen
>1 && pai
->qu
->query_dgram
[labstart
]=='0')
771 return adns_s_querydomainwrong
;
773 for (i
=0; i
<sizeof(expectdomain
)/sizeof(*expectdomain
); i
++) {
774 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
); assert(!st
);
775 l
= strlen(expectdomain
[i
]);
777 memcmp(pai
->qu
->query_dgram
+ labstart
, expectdomain
[i
], l
))
778 return adns_s_querydomainwrong
;
780 st
= adns__findlabel_next(&fls
,&lablen
,0); assert(!st
);
781 if (lablen
) return adns_s_querydomainwrong
;
783 ap
->len
= sizeof(struct sockaddr_in
);
784 memset(&ap
->addr
,0,sizeof(ap
->addr
.inet
));
785 ap
->addr
.inet
.sin_family
= AF_INET
;
786 ap
->addr
.inet
.sin_addr
.s_addr
=
787 htonl((ipv
[0]<<24) | (ipv
[1]<<16) | (ipv
[2]<<8) | (ipv
[3]));
790 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
791 pai
->dgram
, pai
->dglen
, dmstart
,
792 adns_r_addr
, adns_qf_quoteok_query
);
796 ctx
.callback
= icb_ptr
;
797 memset(&ctx
.info
,0,sizeof(ctx
.info
));
798 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(adns_r_addr
),
800 adns_qf_quoteok_query
, pai
->now
, &ctx
);
803 nqu
->parent
= pai
->qu
;
804 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
812 static void mf_strpair(adns_query qu
, void *datap
) {
813 adns_rr_strpair
*rrp
= datap
;
815 adns__makefinal_str(qu
,&rrp
->array
[0]);
816 adns__makefinal_str(qu
,&rrp
->array
[1]);
823 static void mf_intstrpair(adns_query qu
, void *datap
) {
824 adns_rr_intstrpair
*rrp
= datap
;
826 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
827 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
834 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
835 int max
, void *datap
) {
836 adns_rr_intstrpair
*rrp
= datap
;
840 for (i
=0; i
<2; i
++) {
841 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
845 if (cbyte
!= max
) return adns_s_invaliddata
;
854 static adns_status
pap_mailbox822(const parseinfo
*pai
,
855 int *cbyte_io
, int max
, char **mb_r
) {
856 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
857 const unsigned char *p
;
865 adns__findlabel_start(&fls
, pai
->ads
,
867 pai
->dgram
, pai
->dglen
, max
,
868 *cbyte_io
, cbyte_io
);
869 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
871 adns__vbuf_appendstr(vb
,".");
876 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
878 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
879 if (c
== '.' && !neednorm
) neednorm
= 1;
880 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
884 if (needquote
|| neednorm
) {
885 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
886 adns__vbuf_appendq(vb
,"\"",1);
887 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
889 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
890 adns__vbuf_appendq(vb
,p
,1);
892 adns__vbuf_appendq(vb
,"\"",1);
894 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
897 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
899 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
903 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
904 memcpy(str
,vb
->buf
,vb
->used
);
910 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
912 if (pai
->qu
->typei
->typekey
& adns__qtf_mail822
) {
913 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
915 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
919 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
920 return csp_domain(vb
,mailbox
);
927 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
928 int max
, void *datap
) {
929 adns_rr_strpair
*rrp
= datap
;
932 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
935 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
938 if (cbyte
!= max
) return adns_s_invaliddata
;
942 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
943 const adns_rr_strpair
*rrp
= datap
;
946 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
948 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
957 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
958 int max
, void *datap
) {
959 adns_rr_soa
*rrp
= datap
;
960 const byte
*dgram
= pai
->dgram
;
964 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
965 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
968 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
971 if (cbyte
+20 != max
) return adns_s_invaliddata
;
973 for (i
=0; i
<5; i
++) {
976 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
982 static void mf_soa(adns_query qu
, void *datap
) {
983 adns_rr_soa
*rrp
= datap
;
985 adns__makefinal_str(qu
,&rrp
->mname
);
986 adns__makefinal_str(qu
,&rrp
->rname
);
989 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
990 const adns_rr_soa
*rrp
= datap
;
995 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
997 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
999 for (i
=0; i
<5; i
++) {
1000 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1008 * _srv* (pa*2,di,cs*2,qdpl,postsort)
1011 static adns_status
qdpl_srv(adns_state ads
,
1012 const char **p_io
, const char *pe
, int labelnum
,
1013 char label_r
[DNS_MAXDOMAIN
], int *ll_io
,
1014 adns_queryflags flags
,
1015 const typeinfo
*typei
) {
1020 if (labelnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1021 useflags
= adns_qf_quoteok_query
;
1027 st
= adns__qdpl_normal(ads
, p_io
,pe
, labelnum
,label_r
, ll_io
, useflags
,typei
);
1032 if (!ll
|| label_r
[0]!='_')
1033 return adns_s_querydomaininvalid
;
1034 if (memchr(p_orig
+1, '\\', pe
- (p_orig
+1)))
1035 return adns_s_querydomaininvalid
;
1040 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1042 /* might be adns_rr_srvraw* */) {
1043 const byte
*dgram
= pai
->dgram
;
1047 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1049 rrp
->priority
= GET_W(cbyte
, ti
);
1050 rrp
->weight
= GET_W(cbyte
, ti
);
1051 rrp
->port
= GET_W(cbyte
, ti
);
1055 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1056 int max
, void *datap
) {
1057 adns_rr_srvraw
*rrp
= datap
;
1060 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1063 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1064 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1067 if (cbyte
!= max
) return adns_s_invaliddata
;
1071 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1072 int max
, void *datap
) {
1073 adns_rr_srvha
*rrp
= datap
;
1076 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1077 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1078 if (cbyte
!= max
) return adns_s_invaliddata
;
1082 static void mf_srvraw(adns_query qu
, void *datap
) {
1083 adns_rr_srvraw
*rrp
= datap
;
1084 adns__makefinal_str(qu
, &rrp
->host
);
1087 static void mf_srvha(adns_query qu
, void *datap
) {
1088 adns_rr_srvha
*rrp
= datap
;
1089 mfp_hostaddr(qu
,&rrp
->ha
);
1092 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1093 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1094 /* might be const adns_rr_svhostaddr* */
1096 if (ap
->priority
< bp
->priority
) return 0;
1097 if (ap
->priority
> bp
->priority
) return 1;
1101 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1102 /* might be adns_rr_srvraw* */) {
1104 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1109 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1110 const adns_rr_srvraw
*rrp
= datap
;
1113 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1114 return csp_domain(vb
,rrp
->host
);
1117 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1118 const adns_rr_srvha
*rrp
= datap
;
1121 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1122 return csp_hostaddr(vb
,&rrp
->ha
);
1125 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,
1126 const struct typeinfo
*typei
) {
1127 /* we treat everything in the array as if it were an adns_rr_srvha
1128 * even though the array might be of adns_rr_srvraw. That's OK
1129 * because they have the same prefix, which is all we access.
1130 * We use typei->rrsz, too, rather than naive array indexing, of course.
1132 char *workbegin
, *workend
, *search
, *arrayend
;
1133 const adns_rr_srvha
*rr
;
1134 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1135 int cpriority
, totalweight
, runtotal
;
1138 for (workbegin
= array
, arrayend
= workbegin
+ typei
->rrsz
* nrrs
;
1139 workbegin
< arrayend
;
1140 workbegin
= workend
) {
1141 cpriority
= (rr
=(void*)workbegin
)->priority
;
1143 for (workend
= workbegin
, totalweight
= 0;
1144 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1145 workend
+= typei
->rrsz
) {
1146 totalweight
+= rr
->weight
;
1149 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1150 * cpriority. From now on, workbegin points to the `remaining'
1151 * records: we select one record at a time (RFC2782 `Usage rules'
1152 * and `Format of the SRV RR' subsection `Weight') to place at
1153 * workbegin (swapping with the one that was there, and then
1154 * advance workbegin. */
1156 workbegin
+ typei
->rrsz
< workend
; /* don't bother if just one */
1157 workbegin
+= typei
->rrsz
) {
1159 randval
= nrand48(ads
->rand48xsubi
);
1160 randval
%= (totalweight
+ 1);
1161 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1162 * totalweight must be <= 2^26 so probability nonuniformity is
1163 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1164 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1167 for (search
=workbegin
, runtotal
=0;
1168 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1169 search
+= typei
->rrsz
);
1170 assert(search
< arrayend
);
1171 totalweight
-= rr
->weight
;
1172 if (search
!= workbegin
) {
1173 memcpy(&rrtmp
, workbegin
, typei
->rrsz
);
1174 memcpy(workbegin
, search
, typei
->rrsz
);
1175 memcpy(search
, &rrtmp
, typei
->rrsz
);
1180 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1181 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1182 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1190 static void mf_byteblock(adns_query qu
, void *datap
) {
1191 adns_rr_byteblock
*rrp
= datap
;
1192 void *bytes
= rrp
->data
;
1193 adns__makefinal_block(qu
,&bytes
,rrp
->len
);
1201 static adns_status
pa_opaque(const parseinfo
*pai
, int cbyte
,
1202 int max
, void *datap
) {
1203 adns_rr_byteblock
*rrp
= datap
;
1205 rrp
->len
= max
- cbyte
;
1206 rrp
->data
= adns__alloc_interim(pai
->qu
, rrp
->len
);
1207 if (!rrp
->data
) R_NOMEM
;
1208 memcpy(rrp
->data
, pai
->dgram
+ cbyte
, rrp
->len
);
1212 static adns_status
cs_opaque(vbuf
*vb
, const void *datap
) {
1213 const adns_rr_byteblock
*rrp
= datap
;
1218 sprintf(buf
,"\\# %d",rrp
->len
);
1221 for (l
= rrp
->len
, p
= rrp
->data
;
1224 sprintf(buf
," %02x%02x%02x%02x",p
[0],p
[1],p
[2],p
[3]);
1230 sprintf(buf
," %02x",*p
);
1240 static void mf_flat(adns_query qu
, void *data
) { }
1246 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1248 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
1249 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
1251 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1252 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1253 printer,parser,comparer, adns__qdpl_normal,0 }
1254 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1255 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1256 printer,parser,comparer, adns__qdpl_normal,0 }
1257 #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer,qdpl,postsort) \
1258 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1259 printer,parser,comparer,qdpl,postsort }
1261 static const typeinfo typeinfos
[] = {
1262 /* Must be in ascending order of rrtype ! */
1263 /* mem-mgmt code rrt fmt member parser comparer printer */
1265 FLAT_TYPE(a
, "A", 0, inaddr
, pa_inaddr
, di_inaddr
,cs_inaddr
),
1266 DEEP_TYPE(ns_raw
, "NS", "raw",str
, pa_host_raw
,0, cs_domain
),
1267 DEEP_TYPE(cname
, "CNAME", 0, str
, pa_dom_raw
, 0, cs_domain
),
1268 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, pa_soa
, 0, cs_soa
),
1269 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, pa_host_raw
,0, cs_domain
),
1270 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,pa_hinfo
, 0, cs_hinfo
),
1271 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, pa_mx_raw
, di_mx_raw
,cs_inthost
),
1272 DEEP_TYPE(txt
, "TXT", 0, manyistr
,pa_txt
, 0, cs_txt
),
1273 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, pa_rp
, 0, cs_rp
),
1274 XTRA_TYPE(srv_raw
,"SRV", "raw",srvraw
, pa_srvraw
, di_srv
, cs_srvraw
,
1275 qdpl_srv
, postsort_srv
),
1277 FLAT_TYPE(addr
, "A", "addr", addr
, pa_addr
, di_addr
, cs_addr
),
1278 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
,pa_hostaddr
,di_hostaddr
,cs_hostaddr
),
1279 DEEP_TYPE(ptr
, "PTR","checked",str
, pa_ptr
, 0, cs_domain
),
1280 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,pa_mx
, di_mx
, cs_inthostaddr
),
1281 XTRA_TYPE(srv
, "SRV","+addr",srvha
, pa_srvha
, di_srv
, cs_srvha
,
1282 qdpl_srv
, postsort_srv
),
1284 DEEP_TYPE(soa
, "SOA","822", soa
, pa_soa
, 0, cs_soa
),
1285 DEEP_TYPE(rp
, "RP", "822", strpair
, pa_rp
, 0, cs_rp
),
1288 static const typeinfo typeinfo_unknown
=
1289 DEEP_TYPE(unknown
,0, "unknown",byteblock
,pa_opaque
, 0, cs_opaque
);
1291 const typeinfo
*adns__findtype(adns_rrtype type
) {
1292 const typeinfo
*begin
, *end
, *mid
;
1294 if (type
& adns_r_unknown
) return &typeinfo_unknown
;
1296 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1298 while (begin
< end
) {
1299 mid
= begin
+ ((end
-begin
)>>1);
1300 if (mid
->typekey
== type
) return mid
;
1301 if (type
> mid
->typekey
) begin
= mid
+1;