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)
69 * within each section:
86 static adns_status
pap_qstring(const parseinfo
*pai
, int *cbyte_io
, int max
,
87 int *len_r
, char **str_r
) {
88 /* Neither len_r nor str_r may be null.
89 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
91 const byte
*dgram
= pai
->dgram
;
97 if (cbyte
>= max
) return adns_s_invaliddata
;
99 if (cbyte
+l
> max
) return adns_s_invaliddata
;
101 str
= adns__alloc_interim(pai
->qu
, l
+1);
105 memcpy(str
,dgram
+cbyte
,l
);
114 static adns_status
csp_qstring(vbuf
*vb
, const char *dp
, int len
) {
120 for (cn
=0; cn
<len
; cn
++) {
124 } else if (ch
== '"') {
126 } else if (ch
>= 32 && ch
<= 126) {
127 if (!adns__vbuf_append(vb
,&ch
,1)) R_NOMEM
;
129 sprintf(buf
,"\\x%02x",ch
);
142 static void mf_str(adns_query qu
, void *datap
) {
145 adns__makefinal_str(qu
,rrp
);
152 static void mf_intstr(adns_query qu
, void *datap
) {
153 adns_rr_intstr
*rrp
= datap
;
155 adns__makefinal_str(qu
,&rrp
->str
);
162 static void mf_manyistr(adns_query qu
, void *datap
) {
163 adns_rr_intstr
**rrp
= datap
;
164 adns_rr_intstr
*te
, *table
;
168 for (tc
=0, te
= *rrp
; te
->i
>= 0; te
++, tc
++);
170 adns__makefinal_block(qu
,&tablev
,sizeof(*te
)*(tc
+1));
172 for (te
= *rrp
; te
->i
>= 0; te
++)
173 adns__makefinal_str(qu
,&te
->str
);
180 static adns_status
pa_txt(const parseinfo
*pai
, int cbyte
,
181 int max
, void *datap
) {
182 adns_rr_intstr
**rrp
= datap
, *table
, *te
;
183 const byte
*dgram
= pai
->dgram
;
184 int ti
, tc
, l
, startbyte
;
188 if (cbyte
>= max
) return adns_s_invaliddata
;
190 while (cbyte
< max
) {
195 if (cbyte
!= max
|| !tc
) return adns_s_invaliddata
;
197 table
= adns__alloc_interim(pai
->qu
,sizeof(*table
)*(tc
+1));
200 for (cbyte
=startbyte
, ti
=0, te
=table
; ti
<tc
; ti
++, te
++) {
201 st
= pap_qstring(pai
, &cbyte
, max
, &te
->i
, &te
->str
);
204 assert(cbyte
== max
);
213 static adns_status
cs_txt(vbuf
*vb
, const void *datap
) {
214 const adns_rr_intstr
*const *rrp
= datap
;
215 const adns_rr_intstr
*current
;
219 for (current
= *rrp
, spc
=0; current
->i
>= 0; current
++, spc
=1) {
220 if (spc
) CSP_ADDSTR(" ");
221 st
= csp_qstring(vb
,current
->str
,current
->i
); if (st
) return st
;
230 static adns_status
cs_hinfo(vbuf
*vb
, const void *datap
) {
231 const adns_rr_intstrpair
*rrp
= datap
;
234 st
= csp_qstring(vb
,rrp
->array
[0].str
,rrp
->array
[0].i
); if (st
) return st
;
236 st
= csp_qstring(vb
,rrp
->array
[1].str
,rrp
->array
[1].i
); if (st
) return st
;
241 * _inaddr (pa,dip,di)
244 static adns_status
pa_inaddr(const parseinfo
*pai
, int cbyte
,
245 int max
, void *datap
) {
246 struct in_addr
*storeto
= datap
;
248 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
249 memcpy(storeto
, pai
->dgram
+ cbyte
, 4);
253 static int search_sortlist(adns_state ads
, struct in_addr ad
) {
254 const struct sortlist
*slp
;
257 for (i
=0, slp
=ads
->sortlist
;
259 !((ad
.s_addr
& slp
->mask
.s_addr
) == slp
->base
.s_addr
);
264 static int dip_inaddr(adns_state ads
, struct in_addr a
, struct in_addr b
) {
267 if (!ads
->nsortlist
) return 0;
269 ai
= search_sortlist(ads
,a
);
270 bi
= search_sortlist(ads
,b
);
274 static int di_inaddr(adns_state ads
,
275 const void *datap_a
, const void *datap_b
) {
276 const struct in_addr
*ap
= datap_a
, *bp
= datap_b
;
278 return dip_inaddr(ads
,*ap
,*bp
);
281 static adns_status
cs_inaddr(vbuf
*vb
, const void *datap
) {
282 const struct in_addr
*rrp
= datap
, rr
= *rrp
;
285 ia
= inet_ntoa(rr
); assert(ia
);
291 * _addr (pa,di,csp,cs)
294 static adns_status
pa_addr(const parseinfo
*pai
, int cbyte
,
295 int max
, void *datap
) {
296 adns_rr_addr
*storeto
= datap
;
297 const byte
*dgram
= pai
->dgram
;
299 if (max
-cbyte
!= 4) return adns_s_invaliddata
;
300 storeto
->len
= sizeof(storeto
->addr
.inet
);
301 memset(&storeto
->addr
,0,sizeof(storeto
->addr
.inet
));
302 storeto
->addr
.inet
.sin_family
= AF_INET
;
303 memcpy(&storeto
->addr
.inet
.sin_addr
,dgram
+cbyte
,4);
307 static int di_addr(adns_state ads
, const void *datap_a
, const void *datap_b
) {
308 const adns_rr_addr
*ap
= datap_a
, *bp
= datap_b
;
310 assert(ap
->addr
.sa
.sa_family
== AF_INET
);
311 return dip_inaddr(ads
, ap
->addr
.inet
.sin_addr
, bp
->addr
.inet
.sin_addr
);
314 static int div_addr(void *context
, const void *datap_a
, const void *datap_b
) {
315 const adns_state ads
= context
;
317 return di_addr(ads
, datap_a
, datap_b
);
320 static adns_status
csp_addr(vbuf
*vb
, const adns_rr_addr
*rrp
) {
324 switch (rrp
->addr
.inet
.sin_family
) {
327 ia
= inet_ntoa(rrp
->addr
.inet
.sin_addr
); assert(ia
);
331 sprintf(buf
,"AF=%u",rrp
->addr
.sa
.sa_family
);
338 static adns_status
cs_addr(vbuf
*vb
, const void *datap
) {
339 const adns_rr_addr
*rrp
= datap
;
341 return csp_addr(vb
,rrp
);
345 * _domain (pap,csp,cs)
349 static adns_status
pap_domain(const parseinfo
*pai
, int *cbyte_io
, int max
,
350 char **domain_r
, parsedomain_flags flags
) {
354 st
= adns__parse_domain(pai
->qu
->ads
, pai
->serv
, pai
->qu
, &pai
->qu
->vb
, flags
,
355 pai
->dgram
,pai
->dglen
, cbyte_io
, max
);
357 if (!pai
->qu
->vb
.used
) return adns_s_invaliddata
;
359 dm
= adns__alloc_interim(pai
->qu
, pai
->qu
->vb
.used
+1);
362 dm
[pai
->qu
->vb
.used
]= 0;
363 memcpy(dm
,pai
->qu
->vb
.buf
,pai
->qu
->vb
.used
);
369 static adns_status
csp_domain(vbuf
*vb
, const char *domain
) {
371 if (!*domain
) CSP_ADDSTR(".");
375 static adns_status
cs_domain(vbuf
*vb
, const void *datap
) {
376 const char *const *domainp
= datap
;
377 return csp_domain(vb
,*domainp
);
380 static adns_status
pa_dom_raw(const parseinfo
*pai
, int cbyte
,
381 int max
, void *datap
) {
385 st
= pap_domain(pai
, &cbyte
, max
, rrp
, pdf_quoteok
);
388 if (cbyte
!= max
) return adns_s_invaliddata
;
396 static adns_status
pa_host_raw(const parseinfo
*pai
, int cbyte
,
397 int max
, void *datap
) {
401 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
402 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
405 if (cbyte
!= max
) return adns_s_invaliddata
;
410 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
413 static adns_status
pap_findaddrs(const parseinfo
*pai
, adns_rr_hostaddr
*ha
,
414 int *cbyte_io
, int count
, int dmstart
) {
416 int type
, class, rdlen
, rdstart
, ownermatched
;
420 for (rri
=0, naddrs
=-1; rri
<count
; rri
++) {
421 st
= adns__findrr_anychk(pai
->qu
, pai
->serv
, pai
->dgram
,
422 pai
->dglen
, cbyte_io
,
423 &type
, &class, &ttl
, &rdlen
, &rdstart
,
424 pai
->dgram
, pai
->dglen
, dmstart
, &ownermatched
);
426 if (!ownermatched
|| class != DNS_CLASS_IN
|| type
!= adns_r_a
) {
427 if (naddrs
>0) break; else continue;
432 if (!adns__vbuf_ensure(&pai
->qu
->vb
, (naddrs
+1)*sizeof(adns_rr_addr
)))
434 adns__update_expires(pai
->qu
,ttl
,pai
->now
);
435 st
= pa_addr(pai
, rdstart
,rdstart
+rdlen
,
436 pai
->qu
->vb
.buf
+ naddrs
*sizeof(adns_rr_addr
));
441 ha
->addrs
= adns__alloc_interim(pai
->qu
, naddrs
*sizeof(adns_rr_addr
));
442 if (!ha
->addrs
) R_NOMEM
;
443 memcpy(ha
->addrs
, pai
->qu
->vb
.buf
, naddrs
*sizeof(adns_rr_addr
));
445 ha
->astatus
= adns_s_ok
;
447 adns__isort(ha
->addrs
, naddrs
, sizeof(adns_rr_addr
), pai
->qu
->vb
.buf
,
453 static void icb_hostaddr(adns_query parent
, adns_query child
) {
454 adns_answer
*cans
= child
->answer
;
455 adns_rr_hostaddr
*rrp
= child
->ctx
.info
.hostaddr
;
456 adns_state ads
= parent
->ads
;
461 rrp
->naddrs
= (st
>0 && st
<=adns_s_max_tempfail
) ?
-1 : cans
->nrrs
;
462 rrp
->addrs
= cans
->rrs
.addr
;
463 adns__transfer_interim(child
, parent
, rrp
->addrs
,
464 rrp
->naddrs
*sizeof(adns_rr_addr
));
466 if (parent
->children
.head
) {
467 LIST_LINK_TAIL(ads
->childw
,parent
);
469 adns__query_done(parent
);
473 static adns_status
pap_hostaddr(const parseinfo
*pai
, int *cbyte_io
,
474 int max
, adns_rr_hostaddr
*rrp
) {
480 adns_queryflags nflags
;
482 dmstart
= cbyte
= *cbyte_io
;
483 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
484 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
488 rrp
->astatus
= adns_s_ok
;
494 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->nscount
, dmstart
);
496 if (rrp
->naddrs
!= -1) return adns_s_ok
;
498 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->arcount
, dmstart
);
500 if (rrp
->naddrs
!= -1) return adns_s_ok
;
502 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
503 pai
->dgram
, pai
->dglen
, dmstart
,
504 adns_r_addr
, adns_qf_quoteok_query
);
508 ctx
.callback
= icb_hostaddr
;
509 ctx
.info
.hostaddr
= rrp
;
511 nflags
= adns_qf_quoteok_query
;
512 if (!(pai
->qu
->flags
& adns_qf_cname_loose
)) nflags
|= adns_qf_cname_forbid
;
514 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(adns_r_addr
),
515 &pai
->qu
->vb
, id
, nflags
, pai
->now
, &ctx
);
518 nqu
->parent
= pai
->qu
;
519 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
524 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
,
525 int max
, void *datap
) {
526 adns_rr_hostaddr
*rrp
= datap
;
529 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
531 if (cbyte
!= max
) return adns_s_invaliddata
;
536 static int dip_hostaddr(adns_state ads
,
537 const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
538 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
539 if (ap
->astatus
) return 0;
541 assert(ap
->addrs
[0].addr
.sa
.sa_family
== AF_INET
);
542 assert(bp
->addrs
[0].addr
.sa
.sa_family
== AF_INET
);
543 return dip_inaddr(ads
,
544 ap
->addrs
[0].addr
.inet
.sin_addr
,
545 bp
->addrs
[0].addr
.inet
.sin_addr
);
548 static int di_hostaddr(adns_state ads
,
549 const void *datap_a
, const void *datap_b
) {
550 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
552 return dip_hostaddr(ads
, ap
,bp
);
555 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
558 adns__makefinal_str(qu
,&rrp
->host
);
560 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*sizeof(*rrp
->addrs
));
564 static void mf_hostaddr(adns_query qu
, void *datap
) {
565 adns_rr_hostaddr
*rrp
= datap
;
567 mfp_hostaddr(qu
,rrp
);
570 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
576 st
= csp_domain(vb
,rrp
->host
); if (st
) return st
;
579 CSP_ADDSTR(adns_errtypeabbrev(rrp
->astatus
));
581 sprintf(buf
," %d ",rrp
->astatus
);
584 CSP_ADDSTR(adns_errabbrev(rrp
->astatus
));
587 errstr
= adns_strerror(rrp
->astatus
);
588 st
= csp_qstring(vb
,errstr
,strlen(errstr
)); if (st
) return st
;
590 if (rrp
->naddrs
>= 0) {
592 for (i
=0; i
<rrp
->naddrs
; i
++) {
594 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
603 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
604 const adns_rr_hostaddr
*rrp
= datap
;
606 return csp_hostaddr(vb
,rrp
);
613 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
,
614 int max
, void *datap
) {
615 const byte
*dgram
= pai
->dgram
;
616 adns_rr_intstr
*rrp
= datap
;
620 if (cbyte
+2 > max
) return adns_s_invaliddata
;
623 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
624 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
627 if (cbyte
!= max
) return adns_s_invaliddata
;
631 static int di_mx_raw(adns_state ads
, const void *datap_a
, const void *datap_b
) {
632 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
634 if (ap
->i
< bp
->i
) return 0;
635 if (ap
->i
> bp
->i
) return 1;
643 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
,
644 int max
, void *datap
) {
645 const byte
*dgram
= pai
->dgram
;
646 adns_rr_inthostaddr
*rrp
= datap
;
650 if (cbyte
+2 > max
) return adns_s_invaliddata
;
653 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
656 if (cbyte
!= max
) return adns_s_invaliddata
;
660 static int di_mx(adns_state ads
, const void *datap_a
, const void *datap_b
) {
661 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
663 if (ap
->i
< bp
->i
) return 0;
664 if (ap
->i
> bp
->i
) return 1;
665 return dip_hostaddr(ads
, &ap
->ha
, &bp
->ha
);
669 * _inthostaddr (mf,cs)
672 static void mf_inthostaddr(adns_query qu
, void *datap
) {
673 adns_rr_inthostaddr
*rrp
= datap
;
675 mfp_hostaddr(qu
,&rrp
->ha
);
678 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
679 const adns_rr_inthostaddr
*rrp
= datap
;
682 sprintf(buf
,"%u ",rrp
->i
);
685 return csp_hostaddr(vb
,&rrp
->ha
);
692 static adns_status
cs_inthost(vbuf
*vb
, const void *datap
) {
693 const adns_rr_intstr
*rrp
= datap
;
696 sprintf(buf
,"%u ",rrp
->i
);
698 return csp_domain(vb
,rrp
->str
);
702 * _ptr (pa, +icb_ptr)
705 static void icb_ptr(adns_query parent
, adns_query child
) {
706 adns_answer
*cans
= child
->answer
;
707 const adns_rr_addr
*queried
, *found
;
708 adns_state ads
= parent
->ads
;
711 if (cans
->status
== adns_s_nxdomain
|| cans
->status
== adns_s_nodata
) {
712 adns__query_fail(parent
,adns_s_inconsistent
);
714 } else if (cans
->status
) {
715 adns__query_fail(parent
,cans
->status
);
719 queried
= &parent
->ctx
.info
.ptr_parent_addr
;
720 for (i
=0, found
=cans
->rrs
.addr
; i
<cans
->nrrs
; i
++, found
++) {
721 if (queried
->len
== found
->len
&&
722 !memcmp(&queried
->addr
,&found
->addr
,queried
->len
)) {
723 if (!parent
->children
.head
) {
724 adns__query_done(parent
);
727 LIST_LINK_TAIL(ads
->childw
,parent
);
733 adns__query_fail(parent
,adns_s_inconsistent
);
736 static adns_status
pa_ptr(const parseinfo
*pai
, int dmstart
,
737 int max
, void *datap
) {
738 static const char *(expectdomain
[])= { DNS_INADDR_ARPA
};
747 int cbyte
, i
, lablen
, labstart
, l
, id
;
752 st
= pap_domain(pai
, &cbyte
, max
, rrp
,
753 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
755 if (cbyte
!= max
) return adns_s_invaliddata
;
757 ap
= &pai
->qu
->ctx
.info
.ptr_parent_addr
;
759 adns__findlabel_start(&fls
, pai
->ads
, -1, pai
->qu
,
760 pai
->qu
->query_dgram
, pai
->qu
->query_dglen
,
761 pai
->qu
->query_dglen
, DNS_HDRSIZE
, 0);
762 for (i
=0; i
<4; i
++) {
763 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
); assert(!st
);
764 if (lablen
<=0 || lablen
>3) return adns_s_querydomainwrong
;
765 memcpy(labbuf
, pai
->qu
->query_dgram
+ labstart
, lablen
);
767 ipv
[3-i
]= strtoul(labbuf
,&ep
,10);
768 if (*ep
) return adns_s_querydomainwrong
;
769 if (lablen
>1 && pai
->qu
->query_dgram
[labstart
]=='0')
770 return adns_s_querydomainwrong
;
772 for (i
=0; i
<sizeof(expectdomain
)/sizeof(*expectdomain
); i
++) {
773 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
); assert(!st
);
774 l
= strlen(expectdomain
[i
]);
776 memcmp(pai
->qu
->query_dgram
+ labstart
, expectdomain
[i
], l
))
777 return adns_s_querydomainwrong
;
779 st
= adns__findlabel_next(&fls
,&lablen
,0); assert(!st
);
780 if (lablen
) return adns_s_querydomainwrong
;
782 ap
->len
= sizeof(struct sockaddr_in
);
783 memset(&ap
->addr
,0,sizeof(ap
->addr
.inet
));
784 ap
->addr
.inet
.sin_family
= AF_INET
;
785 ap
->addr
.inet
.sin_addr
.s_addr
=
786 htonl((ipv
[0]<<24) | (ipv
[1]<<16) | (ipv
[2]<<8) | (ipv
[3]));
789 st
= adns__mkquery_frdgram(pai
->ads
, &pai
->qu
->vb
, &id
,
790 pai
->dgram
, pai
->dglen
, dmstart
,
791 adns_r_addr
, adns_qf_quoteok_query
);
795 ctx
.callback
= icb_ptr
;
796 memset(&ctx
.info
,0,sizeof(ctx
.info
));
797 st
= adns__internal_submit(pai
->ads
, &nqu
, adns__findtype(adns_r_addr
),
799 adns_qf_quoteok_query
, pai
->now
, &ctx
);
802 nqu
->parent
= pai
->qu
;
803 LIST_LINK_TAIL_PART(pai
->qu
->children
,nqu
,siblings
.);
811 static void mf_strpair(adns_query qu
, void *datap
) {
812 adns_rr_strpair
*rrp
= datap
;
814 adns__makefinal_str(qu
,&rrp
->array
[0]);
815 adns__makefinal_str(qu
,&rrp
->array
[1]);
822 static void mf_intstrpair(adns_query qu
, void *datap
) {
823 adns_rr_intstrpair
*rrp
= datap
;
825 adns__makefinal_str(qu
,&rrp
->array
[0].str
);
826 adns__makefinal_str(qu
,&rrp
->array
[1].str
);
833 static adns_status
pa_hinfo(const parseinfo
*pai
, int cbyte
,
834 int max
, void *datap
) {
835 adns_rr_intstrpair
*rrp
= datap
;
839 for (i
=0; i
<2; i
++) {
840 st
= pap_qstring(pai
, &cbyte
, max
, &rrp
->array
[i
].i
, &rrp
->array
[i
].str
);
844 if (cbyte
!= max
) return adns_s_invaliddata
;
853 static adns_status
pap_mailbox822(const parseinfo
*pai
,
854 int *cbyte_io
, int max
, char **mb_r
) {
855 int lablen
, labstart
, i
, needquote
, c
, r
, neednorm
;
856 const unsigned char *p
;
864 adns__findlabel_start(&fls
, pai
->ads
,
866 pai
->dgram
, pai
->dglen
, max
,
867 *cbyte_io
, cbyte_io
);
868 st
= adns__findlabel_next(&fls
,&lablen
,&labstart
);
870 adns__vbuf_appendstr(vb
,".");
875 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++) {
877 if ((c
&~128) < 32 || (c
&~128) == 127) return adns_s_invaliddata
;
878 if (c
== '.' && !neednorm
) neednorm
= 1;
879 else if (c
==' ' || c
>=127 || ctype_822special(c
)) needquote
++;
883 if (needquote
|| neednorm
) {
884 r
= adns__vbuf_ensure(vb
, lablen
+needquote
+4); if (!r
) R_NOMEM
;
885 adns__vbuf_appendq(vb
,"\"",1);
886 for (i
=0, needquote
=0, p
= pai
->dgram
+labstart
; i
<lablen
; i
++, p
++) {
888 if (c
== '"' || c
=='\\') adns__vbuf_appendq(vb
,"\\",1);
889 adns__vbuf_appendq(vb
,p
,1);
891 adns__vbuf_appendq(vb
,"\"",1);
893 r
= adns__vbuf_append(vb
, pai
->dgram
+labstart
, lablen
); if (!r
) R_NOMEM
;
896 r
= adns__vbuf_appendstr(vb
,"@"); if (!r
) R_NOMEM
;
898 st
= adns__parse_domain_more(&fls
,pai
->ads
, pai
->qu
,vb
,0, pai
->dgram
);
902 str
= adns__alloc_interim(pai
->qu
, vb
->used
+1); if (!str
) R_NOMEM
;
903 memcpy(str
,vb
->buf
,vb
->used
);
909 static adns_status
pap_mailbox(const parseinfo
*pai
, int *cbyte_io
, int max
,
911 if (pai
->qu
->typei
->type
& adns__qtf_mail822
) {
912 return pap_mailbox822(pai
, cbyte_io
, max
, mb_r
);
914 return pap_domain(pai
, cbyte_io
, max
, mb_r
, pdf_quoteok
);
918 static adns_status
csp_mailbox(vbuf
*vb
, const char *mailbox
) {
919 return csp_domain(vb
,mailbox
);
926 static adns_status
pa_rp(const parseinfo
*pai
, int cbyte
,
927 int max
, void *datap
) {
928 adns_rr_strpair
*rrp
= datap
;
931 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->array
[0]);
934 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->array
[1], pdf_quoteok
);
937 if (cbyte
!= max
) return adns_s_invaliddata
;
941 static adns_status
cs_rp(vbuf
*vb
, const void *datap
) {
942 const adns_rr_strpair
*rrp
= datap
;
945 st
= csp_mailbox(vb
,rrp
->array
[0]); if (st
) return st
;
947 st
= csp_domain(vb
,rrp
->array
[1]); if (st
) return st
;
956 static adns_status
pa_soa(const parseinfo
*pai
, int cbyte
,
957 int max
, void *datap
) {
958 adns_rr_soa
*rrp
= datap
;
959 const byte
*dgram
= pai
->dgram
;
963 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->mname
,
964 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
967 st
= pap_mailbox(pai
, &cbyte
, max
, &rrp
->rname
);
970 if (cbyte
+20 != max
) return adns_s_invaliddata
;
972 for (i
=0; i
<5; i
++) {
975 (&rrp
->serial
)[i
]= (msw
<<16) | lsw
;
981 static void mf_soa(adns_query qu
, void *datap
) {
982 adns_rr_soa
*rrp
= datap
;
984 adns__makefinal_str(qu
,&rrp
->mname
);
985 adns__makefinal_str(qu
,&rrp
->rname
);
988 static adns_status
cs_soa(vbuf
*vb
, const void *datap
) {
989 const adns_rr_soa
*rrp
= datap
;
994 st
= csp_domain(vb
,rrp
->mname
); if (st
) return st
;
996 st
= csp_mailbox(vb
,rrp
->rname
); if (st
) return st
;
998 for (i
=0; i
<5; i
++) {
999 sprintf(buf
," %lu",(&rrp
->serial
)[i
]);
1007 * _srv* (pa*2,di,cs*2,qdpl,postsort)
1010 static adns_status
qdpl_srv(adns_state ads
,
1011 const char **p_io
, const char *pe
, int labelnum
,
1012 char label_r
[DNS_MAXDOMAIN
], int *ll_io
,
1013 adns_queryflags flags
,
1014 const typeinfo
*typei
) {
1019 if (labelnum
< 2 && !(flags
& adns_qf_quoteok_query
)) {
1020 useflags
= adns_qf_quoteok_query
;
1026 st
= adns__qdpl_normal(ads
, p_io
,pe
, labelnum
,label_r
, ll_io
, useflags
,typei
);
1031 if (!ll
|| label_r
[0]!='_')
1032 return adns_s_querydomaininvalid
;
1033 if (memchr(p_orig
+1, '\\', pe
- (p_orig
+1)))
1034 return adns_s_querydomaininvalid
;
1039 static adns_status
pap_srv_begin(const parseinfo
*pai
, int *cbyte_io
, int max
,
1041 /* might be adns_rr_srvraw* */) {
1042 const byte
*dgram
= pai
->dgram
;
1046 if ((*cbyte_io
+= 6) > max
) return adns_s_invaliddata
;
1048 rrp
->priority
= GET_W(cbyte
, ti
);
1049 rrp
->weight
= GET_W(cbyte
, ti
);
1050 rrp
->port
= GET_W(cbyte
, ti
);
1054 static adns_status
pa_srvraw(const parseinfo
*pai
, int cbyte
,
1055 int max
, void *datap
) {
1056 adns_rr_srvraw
*rrp
= datap
;
1059 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
);
1062 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
1063 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
1066 if (cbyte
!= max
) return adns_s_invaliddata
;
1070 static adns_status
pa_srvha(const parseinfo
*pai
, int cbyte
,
1071 int max
, void *datap
) {
1072 adns_rr_srvha
*rrp
= datap
;
1075 st
= pap_srv_begin(pai
,&cbyte
,max
,datap
); if (st
) return st
;
1076 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
); if (st
) return st
;
1077 if (cbyte
!= max
) return adns_s_invaliddata
;
1081 static void mf_srvraw(adns_query qu
, void *datap
) {
1082 adns_rr_srvraw
*rrp
= datap
;
1083 adns__makefinal_str(qu
, &rrp
->host
);
1086 static void mf_srvha(adns_query qu
, void *datap
) {
1087 adns_rr_srvha
*rrp
= datap
;
1088 mfp_hostaddr(qu
,&rrp
->ha
);
1091 static int di_srv(adns_state ads
, const void *datap_a
, const void *datap_b
) {
1092 const adns_rr_srvraw
*ap
= datap_a
, *bp
= datap_b
;
1093 /* might be const adns_rr_svhostaddr* */
1095 if (ap
->priority
< bp
->priority
) return 0;
1096 if (ap
->priority
> bp
->priority
) return 1;
1100 static adns_status
csp_srv_begin(vbuf
*vb
, const adns_rr_srvha
*rrp
1101 /* might be adns_rr_srvraw* */) {
1103 sprintf(buf
,"%u %u %u ", rrp
->priority
, rrp
->weight
, rrp
->port
);
1108 static adns_status
cs_srvraw(vbuf
*vb
, const void *datap
) {
1109 const adns_rr_srvraw
*rrp
= datap
;
1112 st
= csp_srv_begin(vb
,(const void*)rrp
); if (st
) return st
;
1113 return csp_domain(vb
,rrp
->host
);
1116 static adns_status
cs_srvha(vbuf
*vb
, const void *datap
) {
1117 const adns_rr_srvha
*rrp
= datap
;
1120 st
= csp_srv_begin(vb
,(const void*)datap
); if (st
) return st
;
1121 return csp_hostaddr(vb
,&rrp
->ha
);
1124 static void postsort_srv(adns_state ads
, void *array
, int nrrs
,
1125 const struct typeinfo
*typei
) {
1126 /* we treat everything in the array as if it were an adns_rr_srvha
1127 * even though the array might be of adns_rr_srvraw. That's OK
1128 * because they have the same prefix, which is all we access.
1129 * We use typei->rrsz, too, rather than naive array indexing, of course.
1131 char *workbegin
, *workend
, *search
, *arrayend
;
1132 const adns_rr_srvha
*rr
;
1133 union { adns_rr_srvha ha
; adns_rr_srvraw raw
; } rrtmp
;
1134 int cpriority
, totalweight
, runtotal
;
1137 for (workbegin
= array
, arrayend
= workbegin
+ typei
->rrsz
* nrrs
;
1138 workbegin
< arrayend
;
1139 workbegin
= workend
) {
1140 cpriority
= (rr
=(void*)workbegin
)->priority
;
1142 for (workend
= workbegin
, totalweight
= 0;
1143 workend
< arrayend
&& (rr
=(void*)workend
)->priority
== cpriority
;
1144 workend
+= typei
->rrsz
) {
1145 totalweight
+= rr
->weight
;
1148 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1149 * cpriority. From now on, workbegin points to the `remaining'
1150 * records: we select one record at a time (RFC2782 `Usage rules'
1151 * and `Format of the SRV RR' subsection `Weight') to place at
1152 * workbegin (swapping with the one that was there, and then
1153 * advance workbegin. */
1155 workbegin
+ typei
->rrsz
< workend
; /* don't bother if just one */
1156 workbegin
+= typei
->rrsz
) {
1158 randval
= nrand48(ads
->rand48xsubi
);
1159 randval
%= (totalweight
+ 1);
1160 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1161 * totalweight must be <= 2^26 so probability nonuniformity is
1162 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1163 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1166 for (search
=workbegin
, runtotal
=0;
1167 (runtotal
+= (rr
=(void*)search
)->weight
) < randval
;
1168 search
+= typei
->rrsz
);
1169 assert(search
< arrayend
);
1170 totalweight
-= rr
->weight
;
1171 if (search
!= workbegin
) {
1172 memcpy(&rrtmp
, workbegin
, typei
->rrsz
);
1173 memcpy(workbegin
, search
, typei
->rrsz
);
1174 memcpy(search
, &rrtmp
, typei
->rrsz
);
1179 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1180 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1181 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1189 static void mf_flat(adns_query qu
, void *data
) { }
1195 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1197 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
1198 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
1200 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1201 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1202 printer,parser,comparer, adns__qdpl_normal,0 }
1203 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1204 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1205 printer,parser,comparer, adns__qdpl_normal,0 }
1206 #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer,qdpl,postsort) \
1207 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1208 printer,parser,comparer,qdpl,postsort }
1210 static const typeinfo typeinfos
[] = {
1211 /* Must be in ascending order of rrtype ! */
1212 /* mem-mgmt code rrt fmt member parser comparer printer */
1214 FLAT_TYPE(a
, "A", 0, inaddr
, pa_inaddr
, di_inaddr
,cs_inaddr
),
1215 DEEP_TYPE(ns_raw
, "NS", "raw",str
, pa_host_raw
,0, cs_domain
),
1216 DEEP_TYPE(cname
, "CNAME", 0, str
, pa_dom_raw
, 0, cs_domain
),
1217 DEEP_TYPE(soa_raw
,"SOA", "raw",soa
, pa_soa
, 0, cs_soa
),
1218 DEEP_TYPE(ptr_raw
,"PTR", "raw",str
, pa_host_raw
,0, cs_domain
),
1219 DEEP_TYPE(hinfo
, "HINFO", 0, intstrpair
,pa_hinfo
, 0, cs_hinfo
),
1220 DEEP_TYPE(mx_raw
, "MX", "raw",intstr
, pa_mx_raw
, di_mx_raw
,cs_inthost
),
1221 DEEP_TYPE(txt
, "TXT", 0, manyistr
,pa_txt
, 0, cs_txt
),
1222 DEEP_TYPE(rp_raw
, "RP", "raw",strpair
, pa_rp
, 0, cs_rp
),
1223 XTRA_TYPE(srv_raw
,"SRV", "raw",srvraw
, pa_srvraw
, di_srv
, cs_srvraw
,
1224 qdpl_srv
, postsort_srv
),
1226 FLAT_TYPE(addr
, "A", "addr", addr
, pa_addr
, di_addr
, cs_addr
),
1227 DEEP_TYPE(ns
, "NS", "+addr",hostaddr
,pa_hostaddr
,di_hostaddr
,cs_hostaddr
),
1228 DEEP_TYPE(ptr
, "PTR","checked",str
, pa_ptr
, 0, cs_domain
),
1229 DEEP_TYPE(mx
, "MX", "+addr",inthostaddr
,pa_mx
, di_mx
, cs_inthostaddr
),
1230 XTRA_TYPE(srv
, "SRV","+addr",srvha
, pa_srvha
, di_srv
, cs_srvha
,
1231 qdpl_srv
, postsort_srv
),
1233 DEEP_TYPE(soa
, "SOA","822", soa
, pa_soa
, 0, cs_soa
),
1234 DEEP_TYPE(rp
, "RP", "822", strpair
, pa_rp
, 0, cs_rp
),
1237 const typeinfo
*adns__findtype(adns_rrtype type
) {
1238 const typeinfo
*begin
, *end
, *mid
;
1240 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
1242 while (begin
< end
) {
1243 mid
= begin
+ ((end
-begin
)>>1);
1244 if (mid
->type
== type
) return mid
;
1245 if (type
> mid
->type
) begin
= mid
+1;