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.
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 * +search_sortlist, dip_genaddr, csp_genaddr)
54 * _addr (pap,pa,di,div,csp,cs,gsz,qs
55 * +search_sortlist_sa, dip_sockaddr,
56 * addr_rrtypes, addr_submit, icb_addr)
57 * _domain (pap,csp,cs)
60 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs
61 * +pap_findaddrs, icb_hostaddr)
64 * _inthostaddr (mf,cs)
66 * _ptr (ckl,pa +icb_ptr)
70 * _mailbox (pap,csp +pap_mailbox822)
73 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
78 * within each section:
97 static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max,
98 int *len_r, char **str_r) {
99 /* Neither len_r nor str_r may be null.
100 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
102 const byte *dgram= pai->dgram;
108 if (cbyte >= max) return adns_s_invaliddata;
110 if (cbyte+l > max) return adns_s_invaliddata;
112 str= adns__alloc_interim(pai->qu, l+1);
116 memcpy(str,dgram+cbyte,l);
125 static adns_status csp_qstring(vbuf *vb, const char *dp, int len) {
131 for (cn=0; cn<len; cn++) {
135 } else if (ch == '"') {
137 } else if (ch >= 32 && ch <= 126) {
138 if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
140 sprintf(buf,"\\x%02x",ch);
153 static void mf_str(adns_query qu, void *datap) {
156 adns__makefinal_str(qu,rrp);
163 static void mf_intstr(adns_query qu, void *datap) {
164 adns_rr_intstr *rrp= datap;
166 adns__makefinal_str(qu,&rrp->str);
173 static void mf_manyistr(adns_query qu, void *datap) {
174 adns_rr_intstr **rrp= datap;
175 adns_rr_intstr *te, *table;
179 for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
181 adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
183 for (te= *rrp; te->i >= 0; te++)
184 adns__makefinal_str(qu,&te->str);
191 static adns_status pa_txt(const parseinfo *pai, int cbyte,
192 int max, void *datap) {
193 adns_rr_intstr **rrp= datap, *table, *te;
194 const byte *dgram= pai->dgram;
195 int ti, tc, l, startbyte;
199 if (cbyte >= max) return adns_s_invaliddata;
201 while (cbyte < max) {
206 if (cbyte != max || !tc) return adns_s_invaliddata;
208 table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
211 for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
212 st= pap_qstring(pai, &cbyte, max, &te->i, &te->str);
215 assert(cbyte == max);
224 static adns_status cs_txt(vbuf *vb, const void *datap) {
225 const adns_rr_intstr *const *rrp= datap;
226 const adns_rr_intstr *current;
230 for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) {
231 if (spc) CSP_ADDSTR(" ");
232 st= csp_qstring(vb,current->str,current->i); if (st) return st;
241 static adns_status cs_hinfo(vbuf *vb, const void *datap) {
242 const adns_rr_intstrpair *rrp= datap;
245 st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st;
247 st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st;
252 * _inaddr (pa,di,cs +search_sortlist, dip_genaddr, csp_genaddr)
255 static adns_status pa_inaddr(const parseinfo *pai, int cbyte,
256 int max, void *datap) {
257 struct in_addr *storeto= datap;
259 if (max-cbyte != 4) return adns_s_invaliddata;
260 memcpy(storeto, pai->dgram + cbyte, 4);
264 static int search_sortlist(adns_state ads, int af, const void *ad) {
265 const struct sortlist *slp;
270 if (af == AF_INET6) {
271 const struct in6_addr *a6= ad;
272 if (IN6_IS_ADDR_V4MAPPED(a6)) {
273 a4.s_addr= htonl(((unsigned long)a6->s6_addr[12] << 24) |
274 ((unsigned long)a6->s6_addr[13] << 16) |
275 ((unsigned long)a6->s6_addr[14] << 8) |
276 ((unsigned long)a6->s6_addr[15] << 0));
281 for (i=0, slp=ads->sortlist;
283 !adns__addr_matches(af,ad, &slp->base,&slp->mask) &&
285 adns__addr_matches(AF_INET,&a4, &slp->base,&slp->mask));
290 static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) {
293 if (!ads->nsortlist) return 0;
295 ai= search_sortlist(ads,af,a);
296 bi= search_sortlist(ads,af,b);
300 static int di_inaddr(adns_state ads,
301 const void *datap_a, const void *datap_b) {
302 return dip_genaddr(ads,AF_INET,datap_a,datap_b);
305 static adns_status csp_genaddr(vbuf *vb, int af, const void *p) {
306 char buf[ADNS_ADDR2TEXT_BUFLEN];
307 int len= sizeof(buf);
311 memset(&a, 0, sizeof(a));
312 a.addr.sa.sa_family= af;
313 adns__addr_inject(p, &a.addr);
314 err= adns_addr2text(&a.addr.sa,0, buf,&len, 0); assert(!err);
319 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
320 return csp_genaddr(vb, AF_INET,datap);
324 * _in6addr (pa,di,cs)
327 static adns_status pa_in6addr(const parseinfo *pai, int cbyte,
328 int max, void *datap) {
329 struct in6_addr *storeto= datap;
331 if (max-cbyte != 16) return adns_s_invaliddata;
332 memcpy(storeto->s6_addr, pai->dgram + cbyte, 16);
336 static int di_in6addr(adns_state ads,
337 const void *datap_a, const void *datap_b) {
338 return dip_genaddr(ads,AF_INET6,datap_a,datap_b);
341 static adns_status cs_in6addr(vbuf *vb, const void *datap) {
342 return csp_genaddr(vb,AF_INET6,datap);
346 * _addr (pap,pa,di,div,csp,cs,gsz,qs
347 * +search_sortlist_sa, dip_sockaddr, addr_rrtypes,
348 * addr_submit, icb_addr)
351 static const typeinfo tinfo_addrsub;
353 #define ADDR_RRTYPES(_) _(a) _(aaaa)
355 static const adns_rrtype addr_all_rrtypes[] = {
356 #define RRTY_CODE(ty) adns_r_##ty,
357 ADDR_RRTYPES(RRTY_CODE)
362 #define RRTY_INDEX(ty) addr__ri_##ty,
363 ADDR_RRTYPES(RRTY_INDEX)
366 #define RRTY_FLAG(ty) addr_rf_##ty = 1 << addr__ri_##ty,
367 ADDR_RRTYPES(RRTY_FLAG)
372 static unsigned addr_rrtypeflag(adns_rrtype type) {
375 type &= adns_rrt_typemask;
376 for (i=0; i<addr_nrrtypes && type!=addr_all_rrtypes[i]; i++);
377 return i < addr_nrrtypes ? 1 << i : 0;
380 /* About CNAME handling in addr queries.
382 * A user-level addr query is translated into a number of protocol-level
383 * queries, and its job is to reassemble the results. This gets tricky if
384 * the answers aren't consistent. In particular, if the answers report
385 * inconsistent indirection via CNAME records (e.g., different CNAMEs, or
386 * some indirect via a CNAME, and some don't) then we have trouble.
388 * Once we've received an answer, even if it was NODATA, we set
389 * adns__qf_addr_answer on the parent query. This will let us detect a
390 * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME.
392 * If we detect a conflict of any kind, then at least one answer came back
393 * with a CNAME record, so we pick the first such answer (somewhat
394 * arbitrarily) as being the `right' canonical name, and set this in the
395 * parent query's answer->cname slot. We discard address records from the
396 * wrong name. And finally we cancel the outstanding child queries, and
397 * resubmit address queries for the address families we don't yet have, with
398 * adns__qf_addr_cname set so that we know that we're in the fixup state.
401 static adns_status pap_addr(const parseinfo *pai, int rrty, size_t rrsz,
402 int *cbyte_io, int max, adns_rr_addr *storeto) {
403 const byte *dgram= pai->dgram;
404 int af, addrlen, salen;
405 struct in6_addr v6map;
406 const void *oaddr= dgram + *cbyte_io;
407 int avail= max - *cbyte_io;
413 if ((pai->qu->flags & adns_qf_ipv6_mapv4) &&
414 (pai->qu->answer->type & adns__qtf_bigaddr)) {
415 if (avail < 4) return adns_s_invaliddata;
416 memset(v6map.s6_addr + 0, 0x00, 10);
417 memset(v6map.s6_addr + 10, 0xff, 2);
418 memcpy(v6map.s6_addr + 12, oaddr, 4);
419 oaddr= v6map.s6_addr; avail= sizeof(v6map.s6_addr);
420 if (step < 0) step= 4;
423 af= AF_INET; addrlen= 4;
424 addrp= &storeto->addr.inet.sin_addr;
425 salen= sizeof(storeto->addr.inet);
429 af= AF_INET6; addrlen= 16;
430 addrp= storeto->addr.inet6.sin6_addr.s6_addr;
431 salen= sizeof(storeto->addr.inet6);
436 assert(offsetof(adns_rr_addr, addr) + salen <= rrsz);
437 if (addrlen < avail) return adns_s_invaliddata;
438 if (step < 0) step= addrlen;
440 memset(&storeto->addr, 0, salen);
442 storeto->addr.sa.sa_family= af;
443 memcpy(addrp, oaddr, addrlen);
448 static adns_status pa_addr(const parseinfo *pai, int cbyte,
449 int max, void *datap) {
450 int err= pap_addr(pai, pai->qu->answer->type & adns_rrt_typemask,
451 pai->qu->answer->rrsz, &cbyte, max, datap);
453 if (cbyte != max) return adns_s_invaliddata;
457 static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) {
458 const void *pa = adns__sockaddr_addr(sa);
459 return search_sortlist(ads, sa->sa_family, pa);
462 static int dip_sockaddr(adns_state ads,
463 const struct sockaddr *sa,
464 const struct sockaddr *sb) {
465 if (!ads->sortlist) return 0;
466 return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb);
469 static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
470 const adns_rr_addr *ap= datap_a, *bp= datap_b;
471 return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa);
474 static int div_addr(void *context, const void *datap_a, const void *datap_b) {
475 const adns_state ads= context;
477 return di_addr(ads, datap_a, datap_b);
480 static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
481 char buf[ADNS_ADDR2TEXT_BUFLEN];
482 int len= sizeof(buf);
485 switch (rrp->addr.inet.sin_family) {
490 CSP_ADDSTR("INET6 ");
493 err= adns_addr2text(&rrp->addr.sa,0, buf,&len, 0); assert(!err);
497 sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
504 static adns_status cs_addr(vbuf *vb, const void *datap) {
505 const adns_rr_addr *rrp= datap;
507 return csp_addr(vb,rrp);
510 static int gsz_addr(const typeinfo *typei, adns_rrtype type) {
511 return type & adns__qtf_bigaddr ?
512 sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only);
515 static unsigned addr_rrtypes(adns_state ads, adns_rrtype type,
516 adns_queryflags qf) {
517 /* Return a mask of addr_rf_... flags indicating which address families are
518 * wanted, given a query type and flags.
521 adns_queryflags permitaf= 0;
524 if (!(type & adns__qtf_bigaddr))
525 qf= (qf & ~adns_qf_want_allaf) | adns_qf_want_ipv4;
527 if (!(qf & adns_qf_want_allaf)) {
528 qf |= (type & adns__qtf_manyaf) ?
529 adns_qf_want_allaf : adns_qf_want_ipv4;
531 if (ads->iflags & adns_if_permit_ipv4) permitaf |= adns_qf_want_ipv4;
532 if (ads->iflags & adns_if_permit_ipv6) permitaf |= adns_qf_want_ipv6;
533 if (qf & permitaf) qf &= permitaf | ~adns_qf_want_allaf;
536 if (qf & adns_qf_want_ipv4) want |= addr_rf_a;
537 if (qf & adns_qf_want_ipv6) want |= addr_rf_aaaa;
542 static void icb_addr(adns_query parent, adns_query child);
544 static void addr_subqueries(adns_query qu, struct timeval now,
545 adns_queryflags qf_extra,
546 const byte *qd_dgram, int qd_dglen) {
549 adns_queryflags qf= (qu->flags & ~adns_qf_search) | qf_extra;
550 adns_rrtype qtf= qu->answer->type & adns__qtf_deref;
551 unsigned which= qu->ctx.tinfo.addr.want & ~qu->ctx.tinfo.addr.have;
554 memset(&ctx, 0, sizeof(ctx));
555 ctx.callback= icb_addr;
556 for (i=0; i<addr_nrrtypes; i++) {
557 if (!(which & (1 << i))) continue;
558 err= adns__mkquery_frdgram(qu->ads, &qu->vb, &id, qd_dgram,qd_dglen,
559 DNS_HDRSIZE, addr_all_rrtypes[i], qf);
560 if (err) goto x_error;
561 err= adns__internal_submit(qu->ads, &cqu, &tinfo_addrsub,
562 addr_all_rrtypes[i] | qtf,
563 &qu->vb, id, qf, now, &ctx);
564 if (err) goto x_error;
565 cqu->answer->rrsz= qu->answer->rrsz;
567 LIST_LINK_TAIL_PART(qu->children, cqu,siblings.);
569 qu->state= query_childw;
570 LIST_LINK_TAIL(qu->ads->childw, qu);
574 adns__query_fail(qu, err);
577 static adns_status addr_submit(adns_query parent, adns_query *query_r,
578 vbuf *qumsg_vb, int id, unsigned want,
579 adns_queryflags flags, struct timeval now,
581 /* This is effectively a substitute for adns__internal_submit, intended for
582 * the case where the caller (possibly) only wants a subset of the
583 * available record types. The memory management and callback rules are
584 * the same as for adns__internal_submit.
586 * Some differences: the query is linked onto the parent's children list
587 * before exit (though the parent's state is not changed, and it is not
588 * linked into the childw list queue); and we fiddle with the `tinfo'
589 * portion of the context structure (yes, modifying *ctx), since this is,
590 * in fact, the main purpose of this function.
593 adns_state ads= parent->ads;
596 adns_rrtype type= ((adns_r_addr & adns_rrt_reprmask) |
597 (parent->answer->type & ~adns_rrt_reprmask));
599 ctx->tinfo.addr.want= want;
600 ctx->tinfo.addr.have= 0;
601 err= adns__internal_submit(ads, &qu, adns__findtype(adns_r_addr),
602 type, qumsg_vb, id, flags, now, ctx);
606 LIST_LINK_TAIL_PART(parent->children, qu, siblings.);
611 static adns_status append_addrs(adns_query qu, size_t rrsz,
612 adns_rr_addr **dp, int *dlen,
613 const adns_rr_addr *sp, int slen) {
614 /* Append a vector of slen addr records, each of size rrsz, starting at ap,
615 * to a vector starting at *dp, of length *dlen. On successful completion,
616 * *dp and *dlen are updated.
619 size_t drrsz= *dlen*rrsz, srrsz= slen*rrsz;
622 if (!slen) return adns_s_ok;
623 p= adns__alloc_interim(qu, drrsz + srrsz);
626 memcpy(p, *dp, drrsz);
627 adns__free_interim(qu, *dp);
629 memcpy(p + drrsz, sp, srrsz);
631 *dp= (adns_rr_addr *)p;
635 static void propagate_ttl(adns_query to, adns_query from)
636 { if (to->expires > from->expires) to->expires= from->expires; }
638 static adns_status copy_cname_from_child(adns_query parent, adns_query child) {
639 adns_answer *pans= parent->answer, *cans= child->answer;
640 size_t n= strlen(cans->cname) + 1;
642 pans->cname= adns__alloc_preserved(parent, n);
643 if (!pans->cname) R_NOMEM;
644 memcpy(pans->cname, cans->cname, n);
648 static void done_addr_type(adns_query qu, adns_rrtype type) {
649 unsigned f= addr_rrtypeflag(type);
650 assert(f); qu->ctx.tinfo.addr.have |= f;
653 static void icb_addr(adns_query parent, adns_query child) {
654 adns_state ads= parent->ads;
655 adns_answer *pans= parent->answer, *cans= child->answer;
661 propagate_ttl(parent, child);
663 if (!(child->flags & adns__qf_addr_cname) &&
664 (parent->flags & adns__qf_addr_answer) &&
665 (!!pans->cname != !!cans->cname ||
666 (pans->cname && strcmp(pans->cname, cans->cname)))) {
667 /* We've detected an inconsistency in CNAME records, and must deploy
672 /* The child has a CNAME record, but the parent doesn't. We must
673 * discard all of the parent's addresses, and substitute the child's.
676 assert(pans->rrsz == cans->rrsz);
677 adns__free_interim(parent, pans->rrs.bytes);
678 adns__transfer_interim(child, parent, cans->rrs.bytes);
679 pans->rrs.bytes= cans->rrs.bytes;
680 pans->nrrs= cans->nrrs;
681 parent->ctx.tinfo.addr.have= 0;
682 done_addr_type(parent, cans->type);
683 err= copy_cname_from_child(parent, child); if (err) goto x_err;
686 /* We've settled on the CNAME (now) associated with the parent, which
687 * already has appropriate address records. Build a query datagram for
688 * this name so that we can issue child queries for the missing address
689 * families. The child's vbuf looks handy for this.
691 err= adns__mkquery(ads, &child->vb, &id, pans->cname,
692 strlen(pans->cname), &tinfo_addrsub,
693 adns_r_addr, parent->flags);
696 /* Now cancel the remaining children, and try again with the CNAME we've
699 adns__cancel_children(parent);
700 if (gettimeofday(&now, 0)) goto x_gtod;
701 qf= adns__qf_addr_cname;
702 if (!(parent->flags & adns_qf_cname_loose)) qf |= adns_qf_cname_forbid;
703 addr_subqueries(parent, now, qf, child->vb.buf, child->vb.used);
707 if (cans->cname && !pans->cname) {
708 err= copy_cname_from_child(parent, child);
712 if ((parent->flags & adns_qf_search) &&
713 !pans->cname && cans->status == adns_s_nxdomain) {
714 /* We're searching a list of suffixes, and the name doesn't exist. Try
718 adns__cancel_children(parent);
719 adns__free_interim(parent, pans->rrs.bytes);
720 pans->rrs.bytes= 0; pans->nrrs= 0;
721 if (gettimeofday(&now, 0)) goto x_gtod;
722 adns__search_next(ads, parent, now);
726 if (cans->status && cans->status != adns_s_nodata)
727 { err= cans->status; goto x_err; }
729 assert(pans->rrsz == cans->rrsz);
730 err= append_addrs(parent, pans->rrsz,
731 &pans->rrs.addr, &pans->nrrs,
732 cans->rrs.addr, cans->nrrs);
734 done_addr_type(parent, cans->type);
736 if (parent->children.head) LIST_LINK_TAIL(ads->childw, parent);
737 else if (!pans->nrrs) adns__query_fail(parent, adns_s_nodata);
738 else adns__query_done(parent);
739 parent->flags |= adns__qf_addr_answer;
743 adns__diag(ads, -1, parent, "gettimeofday failed: %s", strerror(errno));
744 err= adns_s_systemfail;
748 adns__query_fail(parent, err);
751 static void qs_addr(adns_query qu, struct timeval now) {
752 if (!qu->ctx.tinfo.addr.want) {
753 qu->ctx.tinfo.addr.want= addr_rrtypes(qu->ads, qu->answer->type,
755 qu->ctx.tinfo.addr.have= 0;
757 addr_subqueries(qu, now, 0, qu->query_dgram, qu->query_dglen);
761 * _domain (pap,csp,cs)
765 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
766 char **domain_r, parsedomain_flags flags) {
770 st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
771 pai->dgram,pai->dglen, cbyte_io, max);
773 if (!pai->qu->vb.used) return adns_s_invaliddata;
775 dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
778 dm[pai->qu->vb.used]= 0;
779 memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
785 static adns_status csp_domain(vbuf *vb, const char *domain) {
787 if (!*domain) CSP_ADDSTR(".");
791 static adns_status cs_domain(vbuf *vb, const void *datap) {
792 const char *const *domainp= datap;
793 return csp_domain(vb,*domainp);
796 static adns_status pa_dom_raw(const parseinfo *pai, int cbyte,
797 int max, void *datap) {
801 st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
804 if (cbyte != max) return adns_s_invaliddata;
812 static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
813 int max, void *datap) {
817 st= pap_domain(pai, &cbyte, max, rrp,
818 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
821 if (cbyte != max) return adns_s_invaliddata;
826 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
829 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
830 unsigned *want_io, size_t addrsz,
831 int *cbyte_io, int count, int dmstart) {
833 unsigned typef, want= *want_io, need= want;
834 int type, class, rdlen, rdend, rdstart, ownermatched;
838 for (rri=0, naddrs=0; rri<count; rri++) {
839 st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram,
840 pai->dglen, cbyte_io,
841 &type, &class, &ttl, &rdlen, &rdstart,
842 pai->dgram, pai->dglen, dmstart, &ownermatched);
844 if (!ownermatched || class != DNS_CLASS_IN) continue;
845 typef= addr_rrtypeflag(type);
846 if (!(want & typef)) continue;
848 if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) R_NOMEM;
849 adns__update_expires(pai->qu,ttl,pai->now);
850 rdend= rdstart + rdlen;
851 st= pap_addr(pai, type, addrsz, &rdstart, rdend,
852 (adns_rr_addr *)(pai->qu->vb.buf + naddrs*addrsz));
854 if (rdstart != rdend) return adns_s_invaliddata;
858 st= append_addrs(pai->qu, addrsz, &ha->addrs, &ha->naddrs,
859 (const adns_rr_addr *)pai->qu->vb.buf, naddrs);
861 ha->astatus= adns_s_ok;
864 adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf,
872 static void icb_hostaddr(adns_query parent, adns_query child) {
873 adns_answer *cans= child->answer;
874 adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr;
875 adns_state ads= parent->ads;
877 size_t addrsz= gsz_addr(0, parent->answer->type);
879 st= cans->status == adns_s_nodata ? adns_s_ok : cans->status;
881 propagate_ttl(parent, child);
883 assert(addrsz == cans->rrsz);
884 st= append_addrs(parent, addrsz,
885 &rrp->addrs, &rrp->naddrs,
886 cans->rrs.addr, cans->nrrs);
888 if (!rrp->naddrs) { st= adns_s_nodata; goto done; }
890 if (!adns__vbuf_ensure(&parent->vb, addrsz))
891 { st= adns_s_nomemory; goto done; }
892 adns__isort(rrp->addrs, rrp->naddrs, addrsz, parent->vb.buf,
897 adns__free_interim(parent, rrp->addrs);
898 rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : 0;
902 if (parent->children.head) {
903 LIST_LINK_TAIL(ads->childw,parent);
905 adns__query_done(parent);
909 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
910 int max, adns_rr_hostaddr *rrp) {
916 adns_queryflags nflags;
918 size_t addrsz= gsz_addr(0, pai->qu->answer->type);
920 dmstart= cbyte= *cbyte_io;
921 st= pap_domain(pai, &cbyte, max, &rrp->host,
922 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
926 rrp->astatus= adns_s_ok;
932 want= addr_rrtypes(pai->ads, pai->qu->answer->type, pai->qu->flags);
934 st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->nscount, dmstart);
936 if (!want) return adns_s_ok;
938 st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->arcount, dmstart);
940 if (!want) return adns_s_ok;
942 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
943 pai->dgram, pai->dglen, dmstart,
944 adns_r_addr, adns_qf_quoteok_query);
948 ctx.callback= icb_hostaddr;
949 ctx.pinfo.hostaddr= rrp;
951 nflags= adns_qf_quoteok_query | (pai->qu->flags & (adns_qf_want_allaf |
952 adns_qf_ipv6_mapv4));
953 if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
955 st= addr_submit(pai->qu, &nqu, &pai->qu->vb, id, want,
956 nflags, pai->now, &ctx);
962 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte,
963 int max, void *datap) {
964 adns_rr_hostaddr *rrp= datap;
967 st= pap_hostaddr(pai, &cbyte, max, rrp);
969 if (cbyte != max) return adns_s_invaliddata;
974 static int dip_hostaddr(adns_state ads,
975 const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
976 if (ap->astatus != bp->astatus) return ap->astatus;
977 if (ap->astatus) return 0;
979 return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa);
982 static int di_hostaddr(adns_state ads,
983 const void *datap_a, const void *datap_b) {
984 const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
986 return dip_hostaddr(ads, ap,bp);
989 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
991 size_t addrsz= gsz_addr(0, qu->answer->type);
993 adns__makefinal_str(qu,&rrp->host);
995 adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz);
999 static void mf_hostaddr(adns_query qu, void *datap) {
1000 adns_rr_hostaddr *rrp= datap;
1002 mfp_hostaddr(qu,rrp);
1005 static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
1011 st= csp_domain(vb,rrp->host); if (st) return st;
1014 CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus));
1016 sprintf(buf," %d ",rrp->astatus);
1019 CSP_ADDSTR(adns_errabbrev(rrp->astatus));
1022 errstr= adns_strerror(rrp->astatus);
1023 st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st;
1025 if (rrp->naddrs >= 0) {
1027 for (i=0; i<rrp->naddrs; i++) {
1029 st= csp_addr(vb,&rrp->addrs[i]);
1038 static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
1039 const adns_rr_hostaddr *rrp= datap;
1041 return csp_hostaddr(vb,rrp);
1048 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte,
1049 int max, void *datap) {
1050 const byte *dgram= pai->dgram;
1051 adns_rr_intstr *rrp= datap;
1055 if (cbyte+2 > max) return adns_s_invaliddata;
1058 st= pap_domain(pai, &cbyte, max, &rrp->str,
1059 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1062 if (cbyte != max) return adns_s_invaliddata;
1066 static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
1067 const adns_rr_intstr *ap= datap_a, *bp= datap_b;
1069 if (ap->i < bp->i) return 0;
1070 if (ap->i > bp->i) return 1;
1078 static adns_status pa_mx(const parseinfo *pai, int cbyte,
1079 int max, void *datap) {
1080 const byte *dgram= pai->dgram;
1081 adns_rr_inthostaddr *rrp= datap;
1085 if (cbyte+2 > max) return adns_s_invaliddata;
1088 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
1091 if (cbyte != max) return adns_s_invaliddata;
1095 static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
1096 const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
1098 if (ap->i < bp->i) return 0;
1099 if (ap->i > bp->i) return 1;
1100 return dip_hostaddr(ads, &ap->ha, &bp->ha);
1104 * _inthostaddr (mf,cs)
1107 static void mf_inthostaddr(adns_query qu, void *datap) {
1108 adns_rr_inthostaddr *rrp= datap;
1110 mfp_hostaddr(qu,&rrp->ha);
1113 static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
1114 const adns_rr_inthostaddr *rrp= datap;
1117 sprintf(buf,"%u ",rrp->i);
1120 return csp_hostaddr(vb,&rrp->ha);
1127 static adns_status cs_inthost(vbuf *vb, const void *datap) {
1128 const adns_rr_intstr *rrp= datap;
1131 sprintf(buf,"%u ",rrp->i);
1133 return csp_domain(vb,rrp->str);
1137 * _ptr (ckl,pa +icb_ptr)
1140 static adns_status ckl_ptr(adns_state ads, adns_queryflags flags,
1141 union checklabel_state *cls, qcontext *ctx,
1142 int labnum, const char *label, int lablen) {
1144 if (adns__revparse_label(&cls->ptr, labnum, label,lablen))
1145 return adns_s_querydomainwrong;
1147 if (adns__revparse_done(&cls->ptr, labnum,
1148 &ctx->tinfo.ptr.rev_rrtype,
1149 &ctx->tinfo.ptr.addr))
1150 return adns_s_querydomainwrong;
1155 static void icb_ptr(adns_query parent, adns_query child) {
1156 adns_answer *cans= child->answer;
1157 const adns_sockaddr *queried;
1158 const unsigned char *found;
1159 adns_state ads= parent->ads;
1162 if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
1163 adns__query_fail(parent,adns_s_inconsistent);
1165 } else if (cans->status) {
1166 adns__query_fail(parent,cans->status);
1170 queried= &parent->ctx.tinfo.ptr.addr;
1171 for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) {
1172 if (adns__addrs_equal_raw(&queried->sa,
1173 parent->ctx.tinfo.ptr.addr.sa.sa_family,found)) {
1174 if (!parent->children.head) {
1175 adns__query_done(parent);
1178 LIST_LINK_TAIL(ads->childw,parent);
1184 adns__query_fail(parent,adns_s_inconsistent);
1187 static adns_status pa_ptr(const parseinfo *pai, int dmstart,
1188 int max, void *datap) {
1191 adns_rrtype rrtype= pai->qu->ctx.tinfo.ptr.rev_rrtype;
1197 st= pap_domain(pai, &cbyte, max, rrp,
1198 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1200 if (cbyte != max) return adns_s_invaliddata;
1202 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
1203 pai->dgram, pai->dglen, dmstart,
1204 rrtype, adns_qf_quoteok_query);
1208 ctx.callback= icb_ptr;
1209 memset(&ctx.pinfo,0,sizeof(ctx.pinfo));
1210 memset(&ctx.tinfo,0,sizeof(ctx.tinfo));
1211 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(rrtype),
1212 rrtype, &pai->qu->vb, id,
1213 adns_qf_quoteok_query, pai->now, &ctx);
1216 nqu->parent= pai->qu;
1217 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
1225 static void mf_strpair(adns_query qu, void *datap) {
1226 adns_rr_strpair *rrp= datap;
1228 adns__makefinal_str(qu,&rrp->array[0]);
1229 adns__makefinal_str(qu,&rrp->array[1]);
1236 static void mf_intstrpair(adns_query qu, void *datap) {
1237 adns_rr_intstrpair *rrp= datap;
1239 adns__makefinal_str(qu,&rrp->array[0].str);
1240 adns__makefinal_str(qu,&rrp->array[1].str);
1247 static adns_status pa_hinfo(const parseinfo *pai, int cbyte,
1248 int max, void *datap) {
1249 adns_rr_intstrpair *rrp= datap;
1253 for (i=0; i<2; i++) {
1254 st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
1258 if (cbyte != max) return adns_s_invaliddata;
1264 * _mailbox (pap,cs +pap_mailbox822)
1267 static adns_status pap_mailbox822(const parseinfo *pai,
1268 int *cbyte_io, int max, char **mb_r) {
1269 int lablen, labstart, i, needquote, c, r, neednorm;
1270 const unsigned char *p;
1272 findlabel_state fls;
1278 adns__findlabel_start(&fls, pai->ads,
1280 pai->dgram, pai->dglen, max,
1281 *cbyte_io, cbyte_io);
1282 st= adns__findlabel_next(&fls,&lablen,&labstart);
1284 adns__vbuf_appendstr(vb,".");
1289 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
1291 if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
1292 if (c == '.' && !neednorm) neednorm= 1;
1293 else if (c==' ' || c>=127 || ctype_822special(c)) needquote++;
1297 if (needquote || neednorm) {
1298 r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
1299 adns__vbuf_appendq(vb,"\"",1);
1300 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
1302 if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1);
1303 adns__vbuf_appendq(vb,p,1);
1305 adns__vbuf_appendq(vb,"\"",1);
1307 r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
1310 r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
1312 st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
1316 str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
1317 memcpy(str,vb->buf,vb->used);
1323 static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
1325 if (pai->qu->typei->typekey & adns__qtf_mail822) {
1326 return pap_mailbox822(pai, cbyte_io, max, mb_r);
1328 return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok);
1332 static adns_status csp_mailbox(vbuf *vb, const char *mailbox) {
1333 return csp_domain(vb,mailbox);
1340 static adns_status pa_rp(const parseinfo *pai, int cbyte,
1341 int max, void *datap) {
1342 adns_rr_strpair *rrp= datap;
1345 st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
1348 st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
1351 if (cbyte != max) return adns_s_invaliddata;
1355 static adns_status cs_rp(vbuf *vb, const void *datap) {
1356 const adns_rr_strpair *rrp= datap;
1359 st= csp_mailbox(vb,rrp->array[0]); if (st) return st;
1361 st= csp_domain(vb,rrp->array[1]); if (st) return st;
1370 static adns_status pa_soa(const parseinfo *pai, int cbyte,
1371 int max, void *datap) {
1372 adns_rr_soa *rrp= datap;
1373 const byte *dgram= pai->dgram;
1377 st= pap_domain(pai, &cbyte, max, &rrp->mname,
1378 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1381 st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
1384 if (cbyte+20 != max) return adns_s_invaliddata;
1386 for (i=0; i<5; i++) {
1389 (&rrp->serial)[i]= (msw<<16) | lsw;
1395 static void mf_soa(adns_query qu, void *datap) {
1396 adns_rr_soa *rrp= datap;
1398 adns__makefinal_str(qu,&rrp->mname);
1399 adns__makefinal_str(qu,&rrp->rname);
1402 static adns_status cs_soa(vbuf *vb, const void *datap) {
1403 const adns_rr_soa *rrp= datap;
1408 st= csp_domain(vb,rrp->mname); if (st) return st;
1410 st= csp_mailbox(vb,rrp->rname); if (st) return st;
1412 for (i=0; i<5; i++) {
1413 sprintf(buf," %lu",(&rrp->serial)[i]);
1421 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
1424 static adns_status ckl_srv(adns_state ads, adns_queryflags flags,
1425 union checklabel_state *cls, qcontext *ctx,
1426 int labnum, const char *label, int lablen) {
1427 if (labnum < 2 && !(flags & adns_qf_quoteok_query)) {
1428 if (!lablen || label[0] != '_') return adns_s_querydomaininvalid;
1431 return adns__ckl_hostname(ads, flags, cls, ctx, labnum, label, lablen);
1434 static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max,
1436 /* might be adns_rr_srvraw* */) {
1437 const byte *dgram= pai->dgram;
1441 if ((*cbyte_io += 6) > max) return adns_s_invaliddata;
1443 rrp->priority= GET_W(cbyte, ti);
1444 rrp->weight= GET_W(cbyte, ti);
1445 rrp->port= GET_W(cbyte, ti);
1449 static adns_status pa_srvraw(const parseinfo *pai, int cbyte,
1450 int max, void *datap) {
1451 adns_rr_srvraw *rrp= datap;
1454 st= pap_srv_begin(pai,&cbyte,max,datap);
1457 st= pap_domain(pai, &cbyte, max, &rrp->host,
1458 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1461 if (cbyte != max) return adns_s_invaliddata;
1465 static adns_status pa_srvha(const parseinfo *pai, int cbyte,
1466 int max, void *datap) {
1467 adns_rr_srvha *rrp= datap;
1470 st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st;
1471 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st;
1472 if (cbyte != max) return adns_s_invaliddata;
1476 static void mf_srvraw(adns_query qu, void *datap) {
1477 adns_rr_srvraw *rrp= datap;
1478 adns__makefinal_str(qu, &rrp->host);
1481 static void mf_srvha(adns_query qu, void *datap) {
1482 adns_rr_srvha *rrp= datap;
1483 mfp_hostaddr(qu,&rrp->ha);
1486 static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) {
1487 const adns_rr_srvraw *ap= datap_a, *bp= datap_b;
1488 /* might be const adns_rr_svhostaddr* */
1490 if (ap->priority < bp->priority) return 0;
1491 if (ap->priority > bp->priority) return 1;
1495 static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp
1496 /* might be adns_rr_srvraw* */) {
1498 sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port);
1503 static adns_status cs_srvraw(vbuf *vb, const void *datap) {
1504 const adns_rr_srvraw *rrp= datap;
1507 st= csp_srv_begin(vb,(const void*)rrp); if (st) return st;
1508 return csp_domain(vb,rrp->host);
1511 static adns_status cs_srvha(vbuf *vb, const void *datap) {
1512 const adns_rr_srvha *rrp= datap;
1515 st= csp_srv_begin(vb,(const void*)datap); if (st) return st;
1516 return csp_hostaddr(vb,&rrp->ha);
1519 static void postsort_srv(adns_state ads, void *array, int nrrs,int rrsz,
1520 const struct typeinfo *typei) {
1521 /* we treat everything in the array as if it were an adns_rr_srvha
1522 * even though the array might be of adns_rr_srvraw. That's OK
1523 * because they have the same prefix, which is all we access.
1524 * We use rrsz, too, rather than naive array indexing, of course.
1526 char *workbegin, *workend, *search, *arrayend;
1527 const adns_rr_srvha *rr;
1528 union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp;
1529 int cpriority, totalweight, runtotal;
1532 assert(rrsz <= sizeof(rrtmp));
1533 for (workbegin= array, arrayend= workbegin + rrsz * nrrs;
1534 workbegin < arrayend;
1535 workbegin= workend) {
1536 cpriority= (rr=(void*)workbegin)->priority;
1538 for (workend= workbegin, totalweight= 0;
1539 workend < arrayend && (rr=(void*)workend)->priority == cpriority;
1541 totalweight += rr->weight;
1544 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1545 * cpriority. From now on, workbegin points to the `remaining'
1546 * records: we select one record at a time (RFC2782 `Usage rules'
1547 * and `Format of the SRV RR' subsection `Weight') to place at
1548 * workbegin (swapping with the one that was there, and then
1549 * advance workbegin. */
1551 workbegin + rrsz < workend; /* don't bother if just one */
1552 workbegin += rrsz) {
1554 randval= nrand48(ads->rand48xsubi);
1555 randval %= (totalweight + 1);
1556 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1557 * totalweight must be <= 2^26 so probability nonuniformity is
1558 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1559 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1562 for (search=workbegin, runtotal=0;
1563 (runtotal += (rr=(void*)search)->weight) < randval;
1565 assert(search < arrayend);
1566 totalweight -= rr->weight;
1567 if (search != workbegin) {
1568 memcpy(&rrtmp, workbegin, rrsz);
1569 memcpy(workbegin, search, rrsz);
1570 memcpy(search, &rrtmp, rrsz);
1575 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1576 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1577 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1585 static void mf_byteblock(adns_query qu, void *datap) {
1586 adns_rr_byteblock *rrp= datap;
1587 void *bytes= rrp->data;
1588 adns__makefinal_block(qu,&bytes,rrp->len);
1596 static adns_status pa_opaque(const parseinfo *pai, int cbyte,
1597 int max, void *datap) {
1598 adns_rr_byteblock *rrp= datap;
1600 rrp->len= max - cbyte;
1601 rrp->data= adns__alloc_interim(pai->qu, rrp->len);
1602 if (!rrp->data) R_NOMEM;
1603 memcpy(rrp->data, pai->dgram + cbyte, rrp->len);
1607 static adns_status cs_opaque(vbuf *vb, const void *datap) {
1608 const adns_rr_byteblock *rrp= datap;
1613 sprintf(buf,"\\# %d",rrp->len);
1616 for (l= rrp->len, p= rrp->data;
1619 sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]);
1625 sprintf(buf," %02x",*p);
1635 static void mf_flat(adns_query qu, void *data) { }
1641 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1643 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1644 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1645 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1646 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1648 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1649 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1650 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1651 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1656 static const typeinfo typeinfos[] = {
1657 /* Must be in ascending order of rrtype ! */
1658 /* mem-mgmt code rrt fmt member parser comparer printer */
1660 FLAT_TYPE(a, "A", 0, inaddr, inaddr, inaddr,inaddr ),
1661 DEEP_TYPE(ns_raw, "NS", "raw",str, host_raw,0, domain ),
1662 DEEP_TYPE(cname, "CNAME", 0, str, dom_raw, 0, domain ),
1663 DEEP_TYPE(soa_raw,"SOA", "raw",soa, soa, 0, soa ),
1664 DEEP_TYPE(ptr_raw,"PTR", "raw",str, host_raw,0, domain ),
1665 DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,hinfo, 0, hinfo ),
1666 DEEP_TYPE(mx_raw, "MX", "raw",intstr, mx_raw, mx_raw,inthost ),
1667 DEEP_TYPE(txt, "TXT", 0, manyistr, txt, 0, txt ),
1668 DEEP_TYPE(rp_raw, "RP", "raw",strpair, rp, 0, rp ),
1669 FLAT_TYPE(aaaa, "AAAA", 0, in6addr, in6addr, in6addr,in6addr ),
1670 DEEP_TYPE(srv_raw,"SRV", "raw",srvraw , srvraw, srv, srvraw,
1671 .checklabel= ckl_srv, .postsort= postsort_srv),
1673 FLAT_TYPE(addr, "A", "addr", addr, addr, addr, addr,
1674 .getrrsz= gsz_addr, .query_send= qs_addr),
1675 DEEP_TYPE(ns, "NS", "+addr",hostaddr, hostaddr,hostaddr,hostaddr ),
1676 DEEP_TYPE(ptr, "PTR","checked",str, ptr, 0, domain,
1677 .checklabel= ckl_ptr),
1678 DEEP_TYPE(mx, "MX", "+addr",inthostaddr,mx, mx, inthostaddr, ),
1679 DEEP_TYPE(srv, "SRV","+addr",srvha, srvha, srv, srvha,
1680 .checklabel= ckl_srv, .postsort= postsort_srv),
1682 DEEP_TYPE(soa, "SOA","822", soa, soa, 0, soa ),
1683 DEEP_TYPE(rp, "RP", "822", strpair, rp, 0, rp ),
1686 static const typeinfo tinfo_addrsub =
1687 FLAT_TYPE(none, "<addr>","sub",addr, addr, 0, addr,
1688 .getrrsz= gsz_addr);
1690 static const typeinfo typeinfo_unknown=
1691 DEEP_TYPE(unknown,0, "unknown",byteblock,opaque, 0, opaque );
1693 const typeinfo *adns__findtype(adns_rrtype type) {
1694 const typeinfo *begin, *end, *mid;
1696 if (type & adns_r_unknown) return &typeinfo_unknown;
1697 type &= adns_rrt_reprmask;
1699 begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
1701 while (begin < end) {
1702 mid= begin + ((end-begin)>>1);
1703 if (mid->typekey == type) return mid;
1704 if (type > mid->typekey) begin= mid+1;