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>
38 #define R_NOMEM return adns_s_nomemory
39 #define CSP_ADDSTR(s) do { \
40 if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \
47 * _textdata, _qstring (csp)
52 * _inaddr (pa,cs,di, +search_sortlist, dip_genaddr)
54 * _addr (pap,pa,di,csp,cs,gsz,qs, +search_sortlist_sa,
55 * dip_sockaddr, rrtypes)
58 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
61 * _inthostaddr (mf,cs)
66 * _mailbox (pap +pap_mailbox822)
69 * _srv* (ckl,(pap),pa,mf,di,(csp),cs,postsort)
74 * within each section:
91 static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max,
92 int *len_r, char **str_r) {
93 /* Neither len_r nor str_r may be null.
94 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
96 const byte *dgram= pai->dgram;
102 if (cbyte >= max) return adns_s_invaliddata;
104 if (cbyte+l > max) return adns_s_invaliddata;
106 str= adns__alloc_interim(pai->qu, l+1);
110 memcpy(str,dgram+cbyte,l);
119 static adns_status csp_qstring(vbuf *vb, const char *dp, int len) {
125 for (cn=0; cn<len; cn++) {
129 } else if (ch == '"') {
131 } else if (ch >= 32 && ch <= 126) {
132 if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
134 sprintf(buf,"\\x%02x",ch);
147 static void mf_str(adns_query qu, void *datap) {
150 adns__makefinal_str(qu,rrp);
157 static void mf_intstr(adns_query qu, void *datap) {
158 adns_rr_intstr *rrp= datap;
160 adns__makefinal_str(qu,&rrp->str);
167 static void mf_manyistr(adns_query qu, void *datap) {
168 adns_rr_intstr **rrp= datap;
169 adns_rr_intstr *te, *table;
173 for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
175 adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
177 for (te= *rrp; te->i >= 0; te++)
178 adns__makefinal_str(qu,&te->str);
185 static adns_status pa_txt(const parseinfo *pai, int cbyte,
186 int max, void *datap) {
187 adns_rr_intstr **rrp= datap, *table, *te;
188 const byte *dgram= pai->dgram;
189 int ti, tc, l, startbyte;
193 if (cbyte >= max) return adns_s_invaliddata;
195 while (cbyte < max) {
200 if (cbyte != max || !tc) return adns_s_invaliddata;
202 table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
205 for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
206 st= pap_qstring(pai, &cbyte, max, &te->i, &te->str);
209 assert(cbyte == max);
218 static adns_status cs_txt(vbuf *vb, const void *datap) {
219 const adns_rr_intstr *const *rrp= datap;
220 const adns_rr_intstr *current;
224 for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) {
225 if (spc) CSP_ADDSTR(" ");
226 st= csp_qstring(vb,current->str,current->i); if (st) return st;
235 static adns_status cs_hinfo(vbuf *vb, const void *datap) {
236 const adns_rr_intstrpair *rrp= datap;
239 st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st;
241 st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st;
246 * _inaddr (pa,di,cs +search_sortlist, dip_genaddr)
249 static adns_status pa_inaddr(const parseinfo *pai, int cbyte,
250 int max, void *datap) {
251 struct in_addr *storeto= datap;
253 if (max-cbyte != 4) return adns_s_invaliddata;
254 memcpy(storeto, pai->dgram + cbyte, 4);
258 static int search_sortlist(adns_state ads, int af, const void *ad) {
259 const struct sortlist *slp;
260 const struct in6_addr *a6;
265 if (af == AF_INET6) {
267 if (IN6_IS_ADDR_V4MAPPED(a6)) {
268 a.v4.s_addr = htonl(((unsigned long)a6->s6_addr[12] << 24) |
269 ((unsigned long)a6->s6_addr[13] << 16) |
270 ((unsigned long)a6->s6_addr[14] << 8) |
271 ((unsigned long)a6->s6_addr[15] << 0));
276 for (i=0, slp=ads->sortlist;
278 !adns__addr_match_p(af,ad, slp->af,&slp->base,&slp->mask) &&
280 adns__addr_match_p(AF_INET,&a, slp->af,&slp->base,&slp->mask));
285 static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) {
288 if (!ads->nsortlist) return 0;
290 ai= search_sortlist(ads,af,a);
291 bi= search_sortlist(ads,af,b);
295 static int di_inaddr(adns_state ads,
296 const void *datap_a, const void *datap_b) {
297 return dip_genaddr(ads,AF_INET,datap_a,datap_b);
300 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
301 const struct in_addr *rrp= datap, rr= *rrp;
304 ia= inet_ntoa(rr); assert(ia);
310 * _in6addr (pa,di,cs)
313 static adns_status pa_in6addr(const parseinfo *pai, int cbyte,
314 int max, void *datap) {
315 struct in6_addr *storeto= datap;
317 if (max-cbyte != 16) return adns_s_invaliddata;
318 memcpy(storeto->s6_addr, pai->dgram + cbyte, 16);
322 static int di_in6addr(adns_state ads,
323 const void *datap_a, const void *datap_b) {
324 return dip_genaddr(ads,AF_INET6,datap_a,datap_b);
327 static adns_status cs_in6addr(vbuf *vb, const void *datap) {
328 char buf[INET6_ADDRSTRLEN];
331 ia= inet_ntop(AF_INET6, datap, buf, sizeof(buf)); assert(ia);
337 * _addr (pap,pa,di,csp,cs,gsz,qs, +search_sortlist_sa, dip_sockaddr,
341 static const typeinfo tinfo_addrsub;
343 #define ADDR_RRTYPES(_) _(a) _(aaaa)
345 static const adns_rrtype addr_all_rrtypes[] = {
346 #define RRTY_CODE(ty) adns_r_##ty,
347 ADDR_RRTYPES(RRTY_CODE)
352 #define RRTY_INDEX(ty) addr__ri_##ty,
353 ADDR_RRTYPES(RRTY_INDEX)
356 #define RRTY_FLAG(ty) addr_rf_##ty = 1 << addr__ri_##ty,
357 ADDR_RRTYPES(RRTY_FLAG)
362 static unsigned addr_rrtypeflag(adns_rrtype type)
366 type &= adns_rrt_typemask;
367 for (i = 0; i < addr_nrrtypes && type != addr_all_rrtypes[i]; i++);
368 assert(i < addr_nrrtypes);
372 /* About CNAME handling in addr queries.
374 * A user-level addr query is translated into a number of protocol-level
375 * queries, and its job is to reassemble the results. This gets tricky if
376 * the answers aren't consistent. In particular, if the answers report
377 * inconsistent indirection via CNAME records (e.g., different CNAMEs, or
378 * some indirect via a CNAME, and some don't) then we have trouble.
380 * Once we've received an answer, even if it was NODATA, we set
381 * adns__qf_addr_answer on the parent query. This will let us detect a
382 * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME.
384 * If we detect a conflict of any kind, then at least one answer came back
385 * with a CNAME record, so we pick the first such answer (somewhat
386 * arbitrarily) as being the `right' canonical name, and set this in the
387 * parent query's answer->cname slot. We discard address records from the
388 * wrong name. And finally we cancel the outstanding child queries, and
389 * resubmit address queries for the address families we don't yet have, with
390 * adns__qf_addr_cname set so that we know that we're in the fixup state.
393 static adns_status pap_addr(const parseinfo *pai, int rrty, size_t rrsz,
394 int *cbyte_io, int max, adns_rr_addr *storeto)
396 const byte *dgram= pai->dgram;
397 int af, addrlen, salen;
398 struct in6_addr v6map;
399 const void *oaddr = dgram + *cbyte_io;
400 int avail = max - *cbyte_io;
406 if (pai->qu->flags & adns_qf_domapv4) {
407 if (avail < 4) return adns_s_invaliddata;
408 memset(v6map.s6_addr + 0, 0x00, 10);
409 memset(v6map.s6_addr + 10, 0xff, 2);
410 memcpy(v6map.s6_addr + 12, oaddr, 4);
411 oaddr = v6map.s6_addr; avail = sizeof(v6map.s6_addr);
412 if (step < 0) step = 4;
415 af = AF_INET; addrlen = 4;
416 addrp = &storeto->addr.inet.sin_addr;
417 salen = sizeof(storeto->addr.inet);
421 af = AF_INET6; addrlen = 16;
422 addrp = storeto->addr.inet6.sin6_addr.s6_addr;
423 salen = sizeof(storeto->addr.inet6);
428 assert(offsetof(adns_rr_addr, addr) + salen <= rrsz);
429 if (addrlen < avail) return adns_s_invaliddata;
430 if (step < 0) step = addrlen;
432 memset(&storeto->addr, 0, salen);
433 storeto->len = salen;
434 storeto->addr.sa.sa_family = af;
435 memcpy(addrp, oaddr, addrlen);
440 static adns_status pa_addr(const parseinfo *pai, int cbyte,
441 int max, void *datap) {
442 int err = pap_addr(pai, pai->qu->answer->type & adns_rrt_typemask,
443 pai->qu->answer->rrsz, &cbyte, max, datap);
445 if (cbyte != max) return adns_s_invaliddata;
449 static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa)
451 return search_sortlist(ads, sa->sa_family, adns__sockaddr_to_inaddr(sa));
454 static int dip_sockaddr(adns_state ads,
455 const struct sockaddr *sa,
456 const struct sockaddr *sb)
458 if (!ads->sortlist) return 0;
459 return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb);
462 static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
463 const adns_rr_addr *ap= datap_a, *bp= datap_b;
465 return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa);
468 static int div_addr(void *context, const void *datap_a, const void *datap_b) {
469 const adns_state ads= context;
471 return di_addr(ads, datap_a, datap_b);
474 static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
478 switch (rrp->addr.inet.sin_family) {
483 CSP_ADDSTR("INET6 ");
486 err= getnameinfo(&rrp->addr.sa, rrp->len, buf, sizeof(buf), 0, 0,
487 NI_NUMERICHOST); assert(!err);
491 sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
498 static adns_status cs_addr(vbuf *vb, const void *datap) {
499 const adns_rr_addr *rrp= datap;
501 return csp_addr(vb,rrp);
504 static unsigned addr_rrtypes(adns_state ads, adns_rrtype type,
507 adns_queryflags permitaf = 0, hackaf = 0;
510 if (!(qf & (adns_qf_ipv4_only | adns_qf_ipv6_only)))
511 qf |= adns_qf_ipv4_only | adns_qf_ipv6_only;
512 if (!(type & adns__qtf_bigaddr) || !(type & adns__qtf_manyaf))
513 qf = (qf & adns__qf_afmask) | adns_qf_ipv4_only;
514 else if (ads->iflags & adns_if_afmask) {
515 if (ads->iflags & adns_if_af_v4only) {
516 permitaf |= adns_qf_ipv4_only;
517 hackaf |= adns_qf_domapv4;
519 if (ads->iflags & adns_if_af_v6only)
520 permitaf |= adns_qf_ipv6_only;
522 qf &= hackaf | permitaf | ~adns__qf_afmask;
525 if (qf & adns_qf_ipv4_only) want |= addr_rf_a;
526 if (qf & adns_qf_ipv6_only) want |= addr_rf_aaaa;
531 static int gsz_addr(adns_rrtype type)
533 return type & adns__qtf_bigaddr ?
534 sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only);
537 static adns_status append_addrs(adns_query qu, adns_query from, size_t rrsz,
538 adns_rr_addr **dp, int *dlen,
539 const adns_rr_addr *sp, int slen)
541 size_t drrsz = *dlen*rrsz, srrsz = slen*rrsz;
544 if (!slen) return adns_s_ok;
545 p = adns__alloc_interim(qu, drrsz + srrsz);
548 memcpy(p, *dp, drrsz);
549 adns__free_interim(qu, *dp);
551 memcpy(p + drrsz, sp, srrsz);
553 *dp = (adns_rr_addr *)p;
554 if (from && qu->expires > from->expires) qu->expires = from->expires;
558 static void icb_addr(adns_query parent, adns_query child);
560 static void addr_subqueries(adns_query qu, struct timeval now,
561 adns_queryflags qf_extra,
562 const byte *qd_dgram, int qd_dglen)
566 adns_queryflags qf = (qu->flags & ~adns_qf_search) | qf_extra;
567 adns_rrtype qtf = qu->answer->type & adns__qtf_deref;
568 unsigned which = qu->ctx.tinfo.addr.want & ~qu->ctx.tinfo.addr.have;
571 memset(&ctx, 0, sizeof(ctx));
572 ctx.callback = icb_addr;
573 for (i = 0; i < addr_nrrtypes; i++) {
574 if (!(which & (1 << i))) continue;
575 err = adns__mkquery_frdgram(qu->ads, &qu->vb, &id, qd_dgram, qd_dglen,
576 DNS_HDRSIZE, addr_all_rrtypes[i], qf);
577 if (err) goto x_error;
578 err = adns__internal_submit(qu->ads, &cqu, &tinfo_addrsub,
579 addr_all_rrtypes[i] | qtf,
580 &qu->vb, id, qf, now, &ctx);
581 if (err) goto x_error;
582 cqu->answer->rrsz = qu->answer->rrsz;
584 LIST_LINK_TAIL_PART(qu->children, cqu,siblings.);
586 qu->state = query_childw;
587 LIST_LINK_TAIL(qu->ads->childw, qu);
591 adns__query_fail(qu, err);
594 static adns_status addr_submit(adns_query parent, adns_query *query_r,
595 vbuf *qumsg_vb, int id, unsigned want,
596 adns_queryflags flags, struct timeval now,
599 /* This is effectively a substitute for adns__internal_submit, intended for
600 * the case where the caller (possibly) only wants a subset of the
601 * available record types. The memory management and callback rules are
602 * the same as for adns__internal_submit.
604 * Some differences: the query is linked onto the parent's children list
605 * before exit (though the parent's state is not changed, and it is not
606 * linked into the childw list queue); and we fiddle with the `tinfo'
607 * portion of the context structure (yes, modifying *ctx), since this is,
608 * in fact, the main purpose of this function.
611 adns_state ads = parent->ads;
615 (adns_r_addr & adns_rrt_reprmask) |
616 (parent->answer->type & ~adns_rrt_reprmask);
618 ctx->tinfo.addr.want = want;
619 ctx->tinfo.addr.have = 0;
620 err = adns__internal_submit(ads, &qu, adns__findtype(adns_r_addr),
621 type, qumsg_vb, id, flags, now, ctx);
625 LIST_LINK_TAIL_PART(parent->children, qu, siblings.);
630 static adns_status copy_cname_from_child(adns_query parent, adns_query child)
632 adns_answer *pans = parent->answer, *cans = child->answer;
633 size_t n = strlen(cans->cname) + 1;
635 pans->cname = adns__alloc_preserved(parent, n);
636 if (!pans->cname) R_NOMEM;
637 memcpy(pans->cname, cans->cname, n);
641 static void done_addr_type(adns_query qu, adns_rrtype type)
642 { qu->ctx.tinfo.addr.have |= addr_rrtypeflag(type); }
644 static void icb_addr(adns_query parent, adns_query child)
646 adns_state ads = parent->ads;
647 adns_answer *pans = parent->answer, *cans = child->answer;
652 if (!(child->flags & adns__qf_addr_cname) &&
653 (parent->flags & adns__qf_addr_answer) &&
654 (!!pans->cname != !!cans->cname ||
655 (pans->cname && strcmp(pans->cname, cans->cname) != 0))) {
656 /* We've detected an inconsistency in CNAME records, and must deploy
661 /* The child has a CNAME record, but the parent doesn't. We must
662 * discard all of the parent's addresses, and substitute the child's.
665 assert(pans->rrsz == cans->rrsz);
666 adns__free_interim(parent, pans->rrs.bytes);
667 adns__transfer_interim(child, parent, cans->rrs.bytes);
668 pans->rrs.bytes = cans->rrs.bytes;
669 pans->nrrs = cans->nrrs;
670 parent->ctx.tinfo.addr.have = 0;
671 done_addr_type(parent, cans->type);
672 err = copy_cname_from_child(parent, child); if (err) goto x_err;
675 /* We've settled on the CNAME (now) associated with the parent, which
676 * already has appropriate address records. Build a query datagram for
677 * this name so that we can issue child queries for the missing address
678 * families. The child's vbuf looks handy for this.
680 err = adns__mkquery(ads, &child->vb, &id, pans->cname,
681 strlen(pans->cname), &tinfo_addrsub,
682 adns_r_addr, parent->flags);
685 /* Now cancel the remaining children, and try again with the CNAME we've
688 adns__cancel_children(parent);
689 if (gettimeofday(&now, 0)) goto x_gtod;
690 addr_subqueries(parent, now, adns__qf_addr_cname,
691 child->vb.buf, child->vb.used);
695 if (cans->cname && !pans->cname) {
696 err = copy_cname_from_child(parent, child);
700 if ((parent->flags & adns_qf_search) &&
701 !pans->cname && cans->status == adns_s_nxdomain) {
702 /* We're searching a list of suffixes, this is the first answer, and it
703 * tells us that the name doesn't exist. Try the next one.
706 if (parent->expires > child->expires) parent->expires = child->expires;
707 adns__cancel_children(parent);
708 adns__free_interim(parent, pans->rrs.bytes);
709 pans->rrs.bytes = 0; pans->nrrs = 0;
710 if (gettimeofday(&now, 0)) goto x_gtod;
711 adns__search_next(ads, parent, now);
715 if (cans->status && cans->status != adns_s_nodata)
716 { err = cans->status; goto x_err; }
718 assert(pans->rrsz == cans->rrsz);
719 err = append_addrs(parent, child, pans->rrsz,
720 &pans->rrs.addr, &pans->nrrs,
721 cans->rrs.addr, cans->nrrs);
723 done_addr_type(parent, cans->type);
725 if (parent->children.head) LIST_LINK_TAIL(ads->childw, parent);
726 else if (!pans->nrrs) adns__query_fail(parent, adns_s_nodata);
727 else adns__query_done(parent);
728 parent->flags |= adns__qf_addr_answer;
732 adns__diag(ads, -1, parent, "gettimeofday failed: %s", strerror(errno));
733 err = adns_s_systemfail;
737 adns__query_fail(parent, err);
740 static void qs_addr(adns_query qu, struct timeval now)
742 if (!qu->ctx.tinfo.addr.want) {
743 qu->ctx.tinfo.addr.want =
744 addr_rrtypes(qu->ads, qu->answer->type, qu->flags);
745 qu->ctx.tinfo.addr.have = 0;
747 addr_subqueries(qu, now, 0, qu->query_dgram, qu->query_dglen);
751 * _domain (pap,csp,cs)
755 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
756 char **domain_r, parsedomain_flags flags) {
760 st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
761 pai->dgram,pai->dglen, cbyte_io, max);
763 if (!pai->qu->vb.used) return adns_s_invaliddata;
765 dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
768 dm[pai->qu->vb.used]= 0;
769 memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
775 static adns_status csp_domain(vbuf *vb, const char *domain) {
777 if (!*domain) CSP_ADDSTR(".");
781 static adns_status cs_domain(vbuf *vb, const void *datap) {
782 const char *const *domainp= datap;
783 return csp_domain(vb,*domainp);
786 static adns_status pa_dom_raw(const parseinfo *pai, int cbyte,
787 int max, void *datap) {
791 st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
794 if (cbyte != max) return adns_s_invaliddata;
802 static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
803 int max, void *datap) {
807 st= pap_domain(pai, &cbyte, max, rrp,
808 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
811 if (cbyte != max) return adns_s_invaliddata;
816 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
819 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
820 unsigned *want_io, size_t addrsz,
821 int *cbyte_io, int count, int dmstart) {
823 unsigned typef, want = *want_io;
824 int type, class, rdlen, rdend, rdstart, ownermatched;
828 for (rri=0, naddrs=0; rri<count; rri++) {
829 st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram,
830 pai->dglen, cbyte_io,
831 &type, &class, &ttl, &rdlen, &rdstart,
832 pai->dgram, pai->dglen, dmstart, &ownermatched);
834 if (!ownermatched || class != DNS_CLASS_IN) continue;
835 typef = addr_rrtypeflag(type);
836 if (!(want & typef)) continue;
838 if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) R_NOMEM;
839 adns__update_expires(pai->qu,ttl,pai->now);
840 rdend = rdstart + rdlen;
841 st= pap_addr(pai, type, addrsz, &rdstart, rdend,
842 (adns_rr_addr *)(pai->qu->vb.buf + naddrs*addrsz));
844 if (rdstart != rdend) return adns_s_invaliddata;
848 st = append_addrs(pai->qu, 0, addrsz, &ha->addrs, &ha->naddrs,
849 (const adns_rr_addr *)pai->qu->vb.buf, naddrs);
851 ha->astatus= adns_s_ok;
854 adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf,
862 static void icb_hostaddr(adns_query parent, adns_query child) {
863 adns_answer *cans= child->answer;
864 adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr;
865 adns_state ads= parent->ads;
867 size_t addrsz = gsz_addr(parent->answer->type);
869 st= cans->status == adns_s_nodata ? adns_s_ok : cans->status;
872 assert(addrsz == cans->rrsz);
873 st = append_addrs(parent, child, addrsz,
874 &rrp->addrs, &rrp->naddrs,
875 cans->rrs.addr, cans->nrrs);
877 if (!rrp->naddrs) { st = adns_s_nodata; goto done; }
879 if (!adns__vbuf_ensure(&parent->vb, addrsz))
880 { st = adns_s_nomemory; goto done; }
881 adns__isort(rrp->addrs, rrp->naddrs, addrsz, parent->vb.buf,
886 adns__free_interim(parent, rrp->addrs);
887 rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : 0;
891 if (parent->children.head) {
892 LIST_LINK_TAIL(ads->childw,parent);
894 adns__query_done(parent);
898 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
899 int max, adns_rr_hostaddr *rrp) {
905 adns_queryflags nflags;
907 size_t addrsz = gsz_addr(pai->qu->answer->type);
909 dmstart= cbyte= *cbyte_io;
910 st= pap_domain(pai, &cbyte, max, &rrp->host,
911 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
915 rrp->astatus= adns_s_ok;
921 want = addr_rrtypes(pai->ads, pai->qu->answer->type, pai->qu->flags);
923 st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->nscount, dmstart);
925 if (!want) return adns_s_ok;
927 st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->arcount, dmstart);
929 if (!want) return adns_s_ok;
931 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
932 pai->dgram, pai->dglen, dmstart,
933 adns_r_addr, adns_qf_quoteok_query);
937 ctx.callback= icb_hostaddr;
938 ctx.pinfo.hostaddr= rrp;
940 nflags= adns_qf_quoteok_query | (pai->qu->flags & adns__qf_afmask);
941 if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
943 st= addr_submit(pai->qu, &nqu, &pai->qu->vb, id, want,
944 nflags, pai->now, &ctx);
950 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte,
951 int max, void *datap) {
952 adns_rr_hostaddr *rrp= datap;
955 st= pap_hostaddr(pai, &cbyte, max, rrp);
957 if (cbyte != max) return adns_s_invaliddata;
962 static int dip_hostaddr(adns_state ads,
963 const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
964 if (ap->astatus != bp->astatus) return ap->astatus;
965 if (ap->astatus) return 0;
967 return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa);
970 static int di_hostaddr(adns_state ads,
971 const void *datap_a, const void *datap_b) {
972 const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
974 return dip_hostaddr(ads, ap,bp);
977 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
979 size_t sz = qu->answer->type & adns__qtf_bigaddr ?
980 sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only);
981 adns__makefinal_str(qu,&rrp->host);
983 adns__makefinal_block(qu, &tablev, rrp->naddrs*sz);
987 static void mf_hostaddr(adns_query qu, void *datap) {
988 adns_rr_hostaddr *rrp= datap;
990 mfp_hostaddr(qu,rrp);
993 static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
999 st= csp_domain(vb,rrp->host); if (st) return st;
1002 CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus));
1004 sprintf(buf," %d ",rrp->astatus);
1007 CSP_ADDSTR(adns_errabbrev(rrp->astatus));
1010 errstr= adns_strerror(rrp->astatus);
1011 st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st;
1013 if (rrp->naddrs >= 0) {
1015 for (i=0; i<rrp->naddrs; i++) {
1017 st= csp_addr(vb,&rrp->addrs[i]);
1026 static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
1027 const adns_rr_hostaddr *rrp= datap;
1029 return csp_hostaddr(vb,rrp);
1036 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte,
1037 int max, void *datap) {
1038 const byte *dgram= pai->dgram;
1039 adns_rr_intstr *rrp= datap;
1043 if (cbyte+2 > max) return adns_s_invaliddata;
1046 st= pap_domain(pai, &cbyte, max, &rrp->str,
1047 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1050 if (cbyte != max) return adns_s_invaliddata;
1054 static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
1055 const adns_rr_intstr *ap= datap_a, *bp= datap_b;
1057 if (ap->i < bp->i) return 0;
1058 if (ap->i > bp->i) return 1;
1066 static adns_status pa_mx(const parseinfo *pai, int cbyte,
1067 int max, void *datap) {
1068 const byte *dgram= pai->dgram;
1069 adns_rr_inthostaddr *rrp= datap;
1073 if (cbyte+2 > max) return adns_s_invaliddata;
1076 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
1079 if (cbyte != max) return adns_s_invaliddata;
1083 static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
1084 const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
1086 if (ap->i < bp->i) return 0;
1087 if (ap->i > bp->i) return 1;
1088 return dip_hostaddr(ads, &ap->ha, &bp->ha);
1092 * _inthostaddr (mf,cs)
1095 static void mf_inthostaddr(adns_query qu, void *datap) {
1096 adns_rr_inthostaddr *rrp= datap;
1098 mfp_hostaddr(qu,&rrp->ha);
1101 static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
1102 const adns_rr_inthostaddr *rrp= datap;
1105 sprintf(buf,"%u ",rrp->i);
1108 return csp_hostaddr(vb,&rrp->ha);
1115 static adns_status cs_inthost(vbuf *vb, const void *datap) {
1116 const adns_rr_intstr *rrp= datap;
1119 sprintf(buf,"%u ",rrp->i);
1121 return csp_domain(vb,rrp->str);
1125 * _ptr (pa, +icb_ptr)
1128 static void icb_ptr(adns_query parent, adns_query child) {
1129 adns_answer *cans= child->answer;
1130 const union gen_addr *queried;
1131 const unsigned char *found;
1132 adns_state ads= parent->ads;
1135 if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
1136 adns__query_fail(parent,adns_s_inconsistent);
1138 } else if (cans->status) {
1139 adns__query_fail(parent,cans->status);
1143 queried= &parent->ctx.tinfo.ptr.addr.addr;
1144 for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found += cans->rrsz) {
1145 if (!memcmp(queried,found,cans->rrsz)) {
1146 if (!parent->children.head) {
1147 adns__query_done(parent);
1150 LIST_LINK_TAIL(ads->childw,parent);
1156 adns__query_fail(parent,adns_s_inconsistent);
1159 static adns_status ckl_ptr(adns_state ads, adns_queryflags flags,
1160 union checklabel_state *css, qcontext *ctx,
1161 int labnum, const char *label, int lablen)
1164 if (adns__revparse_label(&css->ptr, labnum, label,lablen))
1165 return adns_s_querydomainwrong;
1167 if (adns__revparse_done(&css->ptr, labnum,
1168 &ctx->tinfo.ptr.rev_rrtype,
1169 &ctx->tinfo.ptr.addr))
1170 return adns_s_querydomainwrong;
1175 static adns_status pa_ptr(const parseinfo *pai, int dmstart,
1176 int max, void *datap) {
1179 adns_rrtype rrtype = pai->qu->ctx.tinfo.ptr.rev_rrtype;
1185 st= pap_domain(pai, &cbyte, max, rrp,
1186 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1188 if (cbyte != max) return adns_s_invaliddata;
1190 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
1191 pai->dgram, pai->dglen, dmstart,
1192 rrtype, adns_qf_quoteok_query);
1196 ctx.callback= icb_ptr;
1197 memset(&ctx.pinfo,0,sizeof(ctx.pinfo));
1198 memset(&ctx.tinfo,0,sizeof(ctx.tinfo));
1199 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(rrtype),
1200 rrtype, &pai->qu->vb, id,
1201 adns_qf_quoteok_query, pai->now, &ctx);
1204 nqu->parent= pai->qu;
1205 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
1213 static void mf_strpair(adns_query qu, void *datap) {
1214 adns_rr_strpair *rrp= datap;
1216 adns__makefinal_str(qu,&rrp->array[0]);
1217 adns__makefinal_str(qu,&rrp->array[1]);
1224 static void mf_intstrpair(adns_query qu, void *datap) {
1225 adns_rr_intstrpair *rrp= datap;
1227 adns__makefinal_str(qu,&rrp->array[0].str);
1228 adns__makefinal_str(qu,&rrp->array[1].str);
1235 static adns_status pa_hinfo(const parseinfo *pai, int cbyte,
1236 int max, void *datap) {
1237 adns_rr_intstrpair *rrp= datap;
1241 for (i=0; i<2; i++) {
1242 st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
1246 if (cbyte != max) return adns_s_invaliddata;
1255 static adns_status pap_mailbox822(const parseinfo *pai,
1256 int *cbyte_io, int max, char **mb_r) {
1257 int lablen, labstart, i, needquote, c, r, neednorm;
1258 const unsigned char *p;
1260 findlabel_state fls;
1266 adns__findlabel_start(&fls, pai->ads,
1268 pai->dgram, pai->dglen, max,
1269 *cbyte_io, cbyte_io);
1270 st= adns__findlabel_next(&fls,&lablen,&labstart);
1272 adns__vbuf_appendstr(vb,".");
1277 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
1279 if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
1280 if (c == '.' && !neednorm) neednorm= 1;
1281 else if (c==' ' || c>=127 || ctype_822special(c)) needquote++;
1285 if (needquote || neednorm) {
1286 r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
1287 adns__vbuf_appendq(vb,"\"",1);
1288 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
1290 if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1);
1291 adns__vbuf_appendq(vb,p,1);
1293 adns__vbuf_appendq(vb,"\"",1);
1295 r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
1298 r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
1300 st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
1304 str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
1305 memcpy(str,vb->buf,vb->used);
1311 static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
1313 if (pai->qu->typei->typekey & adns__qtf_mail822) {
1314 return pap_mailbox822(pai, cbyte_io, max, mb_r);
1316 return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok);
1320 static adns_status csp_mailbox(vbuf *vb, const char *mailbox) {
1321 return csp_domain(vb,mailbox);
1328 static adns_status pa_rp(const parseinfo *pai, int cbyte,
1329 int max, void *datap) {
1330 adns_rr_strpair *rrp= datap;
1333 st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
1336 st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
1339 if (cbyte != max) return adns_s_invaliddata;
1343 static adns_status cs_rp(vbuf *vb, const void *datap) {
1344 const adns_rr_strpair *rrp= datap;
1347 st= csp_mailbox(vb,rrp->array[0]); if (st) return st;
1349 st= csp_domain(vb,rrp->array[1]); if (st) return st;
1358 static adns_status pa_soa(const parseinfo *pai, int cbyte,
1359 int max, void *datap) {
1360 adns_rr_soa *rrp= datap;
1361 const byte *dgram= pai->dgram;
1365 st= pap_domain(pai, &cbyte, max, &rrp->mname,
1366 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1369 st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
1372 if (cbyte+20 != max) return adns_s_invaliddata;
1374 for (i=0; i<5; i++) {
1377 (&rrp->serial)[i]= (msw<<16) | lsw;
1383 static void mf_soa(adns_query qu, void *datap) {
1384 adns_rr_soa *rrp= datap;
1386 adns__makefinal_str(qu,&rrp->mname);
1387 adns__makefinal_str(qu,&rrp->rname);
1390 static adns_status cs_soa(vbuf *vb, const void *datap) {
1391 const adns_rr_soa *rrp= datap;
1396 st= csp_domain(vb,rrp->mname); if (st) return st;
1398 st= csp_mailbox(vb,rrp->rname); if (st) return st;
1400 for (i=0; i<5; i++) {
1401 sprintf(buf," %lu",(&rrp->serial)[i]);
1409 * _srv* (pa*2,di,cs*2,ckl,postsort)
1412 static adns_status ckl_srv(adns_state ads, adns_queryflags flags,
1413 union checklabel_state *css, qcontext *ctx,
1414 int labnum, const char *label, int lablen)
1416 if (labnum < 2 && !(flags & adns_qf_quoteok_query)) {
1417 if (!lablen || label[0] != '_') return adns_s_querydomaininvalid;
1420 return adns__ckl_hostname(ads, flags, css, ctx, labnum, label, lablen);
1423 static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max,
1425 /* might be adns_rr_srvraw* */) {
1426 const byte *dgram= pai->dgram;
1430 if ((*cbyte_io += 6) > max) return adns_s_invaliddata;
1432 rrp->priority= GET_W(cbyte, ti);
1433 rrp->weight= GET_W(cbyte, ti);
1434 rrp->port= GET_W(cbyte, ti);
1438 static adns_status pa_srvraw(const parseinfo *pai, int cbyte,
1439 int max, void *datap) {
1440 adns_rr_srvraw *rrp= datap;
1443 st= pap_srv_begin(pai,&cbyte,max,datap);
1446 st= pap_domain(pai, &cbyte, max, &rrp->host,
1447 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1450 if (cbyte != max) return adns_s_invaliddata;
1454 static adns_status pa_srvha(const parseinfo *pai, int cbyte,
1455 int max, void *datap) {
1456 adns_rr_srvha *rrp= datap;
1459 st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st;
1460 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st;
1461 if (cbyte != max) return adns_s_invaliddata;
1465 static void mf_srvraw(adns_query qu, void *datap) {
1466 adns_rr_srvraw *rrp= datap;
1467 adns__makefinal_str(qu, &rrp->host);
1470 static void mf_srvha(adns_query qu, void *datap) {
1471 adns_rr_srvha *rrp= datap;
1472 mfp_hostaddr(qu,&rrp->ha);
1475 static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) {
1476 const adns_rr_srvraw *ap= datap_a, *bp= datap_b;
1477 /* might be const adns_rr_svhostaddr* */
1479 if (ap->priority < bp->priority) return 0;
1480 if (ap->priority > bp->priority) return 1;
1484 static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp
1485 /* might be adns_rr_srvraw* */) {
1487 sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port);
1492 static adns_status cs_srvraw(vbuf *vb, const void *datap) {
1493 const adns_rr_srvraw *rrp= datap;
1496 st= csp_srv_begin(vb,(const void*)rrp); if (st) return st;
1497 return csp_domain(vb,rrp->host);
1500 static adns_status cs_srvha(vbuf *vb, const void *datap) {
1501 const adns_rr_srvha *rrp= datap;
1504 st= csp_srv_begin(vb,(const void*)datap); if (st) return st;
1505 return csp_hostaddr(vb,&rrp->ha);
1508 static void postsort_srv(adns_state ads, void *array, int nrrs,
1509 const struct typeinfo *typei) {
1510 /* we treat everything in the array as if it were an adns_rr_srvha
1511 * even though the array might be of adns_rr_srvraw. That's OK
1512 * because they have the same prefix, which is all we access.
1513 * We use typei->rrsz, too, rather than naive array indexing, of course.
1515 char *workbegin, *workend, *search, *arrayend;
1516 const adns_rr_srvha *rr;
1517 union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp;
1518 int cpriority, totalweight, runtotal;
1521 for (workbegin= array, arrayend= workbegin + typei->rrsz * nrrs;
1522 workbegin < arrayend;
1523 workbegin= workend) {
1524 cpriority= (rr=(void*)workbegin)->priority;
1526 for (workend= workbegin, totalweight= 0;
1527 workend < arrayend && (rr=(void*)workend)->priority == cpriority;
1528 workend += typei->rrsz) {
1529 totalweight += rr->weight;
1532 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1533 * cpriority. From now on, workbegin points to the `remaining'
1534 * records: we select one record at a time (RFC2782 `Usage rules'
1535 * and `Format of the SRV RR' subsection `Weight') to place at
1536 * workbegin (swapping with the one that was there, and then
1537 * advance workbegin. */
1539 workbegin + typei->rrsz < workend; /* don't bother if just one */
1540 workbegin += typei->rrsz) {
1542 randval= nrand48(ads->rand48xsubi);
1543 randval %= (totalweight + 1);
1544 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1545 * totalweight must be <= 2^26 so probability nonuniformity is
1546 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1547 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1550 for (search=workbegin, runtotal=0;
1551 (runtotal += (rr=(void*)search)->weight) < randval;
1552 search += typei->rrsz);
1553 assert(search < arrayend);
1554 totalweight -= rr->weight;
1555 if (search != workbegin) {
1556 memcpy(&rrtmp, workbegin, typei->rrsz);
1557 memcpy(workbegin, search, typei->rrsz);
1558 memcpy(search, &rrtmp, typei->rrsz);
1563 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1564 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1565 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1573 static void mf_byteblock(adns_query qu, void *datap) {
1574 adns_rr_byteblock *rrp= datap;
1575 void *bytes= rrp->data;
1576 adns__makefinal_block(qu,&bytes,rrp->len);
1584 static adns_status pa_opaque(const parseinfo *pai, int cbyte,
1585 int max, void *datap) {
1586 adns_rr_byteblock *rrp= datap;
1588 rrp->len= max - cbyte;
1589 rrp->data= adns__alloc_interim(pai->qu, rrp->len);
1590 if (!rrp->data) R_NOMEM;
1591 memcpy(rrp->data, pai->dgram + cbyte, rrp->len);
1595 static adns_status cs_opaque(vbuf *vb, const void *datap) {
1596 const adns_rr_byteblock *rrp= datap;
1601 sprintf(buf,"\\# %d",rrp->len);
1604 for (l= rrp->len, p= rrp->data;
1607 sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]);
1613 sprintf(buf," %02x",*p);
1623 static void mf_flat(adns_query qu, void *data) { }
1629 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1631 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
1632 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
1634 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1635 { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), \
1636 mf_##memb, printer,parser,comparer, adns__ckl_hostname,0,0,0 }
1637 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1638 { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), \
1639 mf_flat, printer,parser,comparer, adns__ckl_hostname,0,0,0 }
1640 #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer, \
1641 makefinal,ckl,postsort,getrrsz,sender) \
1642 { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), makefinal, \
1643 printer,parser,comparer,ckl,postsort,getrrsz,sender }
1645 static const typeinfo typeinfos[] = {
1646 /* Must be in ascending order of rrtype ! */
1647 /* mem-mgmt code rrt fmt member parser comparer printer */
1649 FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr,cs_inaddr ),
1650 DEEP_TYPE(ns_raw, "NS", "raw",str, pa_host_raw,0, cs_domain ),
1651 DEEP_TYPE(cname, "CNAME", 0, str, pa_dom_raw, 0, cs_domain ),
1652 DEEP_TYPE(soa_raw,"SOA", "raw",soa, pa_soa, 0, cs_soa ),
1653 DEEP_TYPE(ptr_raw,"PTR", "raw",str, pa_host_raw,0, cs_domain ),
1654 DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,pa_hinfo, 0, cs_hinfo ),
1655 DEEP_TYPE(mx_raw, "MX", "raw",intstr, pa_mx_raw, di_mx_raw,cs_inthost ),
1656 DEEP_TYPE(txt, "TXT", 0, manyistr,pa_txt, 0, cs_txt ),
1657 DEEP_TYPE(rp_raw, "RP", "raw",strpair, pa_rp, 0, cs_rp ),
1658 FLAT_TYPE(aaaa, "AAAA", 0, in6addr, pa_in6addr, di_in6addr,cs_in6addr ),
1659 XTRA_TYPE(srv_raw,"SRV", "raw",srvraw , pa_srvraw, di_srv, cs_srvraw,
1660 mf_srvraw, ckl_srv, postsort_srv, 0, 0),
1662 XTRA_TYPE(addr, "A", "addr", addr, pa_addr, di_addr, cs_addr,
1663 mf_flat, adns__ckl_hostname, 0, gsz_addr, qs_addr),
1664 DEEP_TYPE(ns, "NS", "+addr",hostaddr,pa_hostaddr,di_hostaddr,cs_hostaddr ),
1665 XTRA_TYPE(ptr, "PTR","checked",str, pa_ptr, 0, cs_domain,
1666 mf_str, ckl_ptr, 0, 0, 0),
1667 DEEP_TYPE(mx, "MX", "+addr",inthostaddr,pa_mx, di_mx, cs_inthostaddr),
1668 XTRA_TYPE(srv, "SRV","+addr",srvha, pa_srvha, di_srv, cs_srvha,
1669 mf_srvha, ckl_srv, postsort_srv, 0, 0),
1671 DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0, cs_soa ),
1672 DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0, cs_rp ),
1675 static const typeinfo tinfo_addrsub =
1676 XTRA_TYPE(none, "<addr>","sub",addr, pa_addr, 0, cs_addr,
1677 mf_flat, adns__ckl_hostname, 0, gsz_addr, 0);
1679 static const typeinfo typeinfo_unknown=
1680 DEEP_TYPE(unknown,0, "unknown",byteblock,pa_opaque, 0, cs_opaque );
1682 const typeinfo *adns__findtype(adns_rrtype type) {
1683 const typeinfo *begin, *end, *mid;
1685 if (type & adns_r_unknown) return &typeinfo_unknown;
1686 type &= adns_rrt_reprmask;
1688 begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
1690 while (begin < end) {
1691 mid= begin + ((end-begin)>>1);
1692 if (mid->typekey == type) return mid;
1693 if (type > mid->typekey) begin= mid+1;