3 * - RR-type-specific code, and the machinery to call it
6 * This file is part of adns, which is
7 * Copyright (C) 1997-2000,2003,2006,2014-2016,2020 Ian Jackson
8 * Copyright (C) 2014 Mark Wooding
9 * Copyright (C) 1999-2000,2003,2006 Tony Finch
10 * Copyright (C) 1991 Massachusetts Institute of Technology
11 * (See the file INSTALL for full details.)
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 3, 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.
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, adns_rrtype rrt, 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, adns_rrtype rrt, 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, adns_rrtype rrt, 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, adns_rrtype rrt, 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)
368 addr__rrty_eat_final_comma
372 static unsigned addr_rrtypeflag(adns_rrtype type) {
375 type &= adns_rrt_typemask;
376 for (i=0; i<addr_nrrtypes; i++)
377 if (type==addr_all_rrtypes[i])
382 /* About CNAME handling in addr queries.
384 * A user-level addr query is translated into a number of protocol-level
385 * queries, and its job is to reassemble the results. This gets tricky if
386 * the answers aren't consistent. In particular, if the answers report
387 * inconsistent indirection via CNAME records (e.g., different CNAMEs, or
388 * some indirect via a CNAME, and some don't) then we have trouble.
390 * Once we've received an answer, even if it was NODATA, we set
391 * adns__qf_addr_answer on the parent query. This will let us detect a
392 * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME.
394 * If we detect a conflict of any kind, then at least one answer came back
395 * with a CNAME record, so we pick the first such answer (somewhat
396 * arbitrarily) as being the `right' canonical name, and set this in the
397 * parent query's answer->cname slot. We discard address records from the
398 * wrong name. And finally we cancel the outstanding child queries, and
399 * resubmit address queries for the address families we don't yet have, with
400 * adns__qf_addr_cname set so that we know that we're in the fixup state.
403 static adns_status pap_addr(const parseinfo *pai, int in_rrty, size_t out_rrsz,
404 int *cbyte_io, int cbyte_max, adns_rr_addr *out) {
406 int out_af, out_salen;
407 struct in6_addr v6map;
409 const void *use_addr= pai->dgram + *cbyte_io;
412 case adns_r_a: in_addrlen= 4; out_af= AF_INET; break;
413 case adns_r_aaaa: in_addrlen= 16; out_af= AF_INET6; break;
417 if ((*cbyte_io + in_addrlen) != cbyte_max) return adns_s_invaliddata;
419 if (out_af==AF_INET &&
420 (pai->qu->flags & adns_qf_ipv6_mapv4) &&
421 (pai->qu->answer->type & adns__qtf_bigaddr)) {
422 memset(v6map.s6_addr + 0, 0x00, 10);
423 memset(v6map.s6_addr + 10, 0xff, 2);
424 memcpy(v6map.s6_addr + 12, use_addr, 4);
425 use_addr= v6map.s6_addr;
430 case AF_INET: out_salen= sizeof(out->addr.inet); break;
431 case AF_INET6: out_salen= sizeof(out->addr.inet6); break;
435 assert(offsetof(adns_rr_addr, addr) + out_salen <= out_rrsz);
437 memset(&out->addr, 0, out_salen);
439 out->addr.sa.sa_family= out_af;
440 adns__addr_inject(use_addr, &out->addr);
442 *cbyte_io += in_addrlen;
446 static adns_status pa_addr(const parseinfo *pai, int cbyte,
447 int max, void *datap) {
448 int err= pap_addr(pai, pai->qu->answer->type & adns_rrt_typemask,
449 pai->qu->answer->rrsz, &cbyte, max, datap);
451 if (cbyte != max) return adns_s_invaliddata;
455 static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) {
456 const void *pa = adns__sockaddr_addr(sa);
457 return search_sortlist(ads, sa->sa_family, pa);
460 static int dip_sockaddr(adns_state ads,
461 const struct sockaddr *sa,
462 const struct sockaddr *sb) {
463 if (!ads->sortlist) return 0;
464 return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb);
467 static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
468 const adns_rr_addr *ap= datap_a, *bp= datap_b;
469 return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa);
472 static int div_addr(void *context, const void *datap_a, const void *datap_b) {
473 const adns_state ads= context;
475 return di_addr(ads, datap_a, datap_b);
478 static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
479 char buf[ADNS_ADDR2TEXT_BUFLEN];
480 int len= sizeof(buf);
483 switch (rrp->addr.inet.sin_family) {
488 CSP_ADDSTR("INET6 ");
491 err= adns_addr2text(&rrp->addr.sa,0, buf,&len, 0); assert(!err);
495 sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
502 static adns_status cs_addr(vbuf *vb, adns_rrtype rrt, const void *datap) {
503 const adns_rr_addr *rrp= datap;
505 return csp_addr(vb,rrp);
508 static int gsz_addr(const typeinfo *typei, adns_rrtype type) {
509 return type & adns__qtf_bigaddr ?
510 sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only);
513 static unsigned addr_rrtypes(adns_state ads, adns_rrtype type,
514 adns_queryflags qf) {
515 /* Return a mask of addr_rf_... flags indicating which address families are
516 * wanted, given a query type and flags.
519 adns_queryflags permitaf= 0;
522 if (!(type & adns__qtf_bigaddr))
523 qf= (qf & ~adns_qf_want_allaf) | adns_qf_want_ipv4;
525 if (!(qf & adns_qf_want_allaf)) {
526 qf |= (type & adns__qtf_manyaf) ?
527 adns_qf_want_allaf : adns_qf_want_ipv4;
529 if (ads->iflags & adns_if_permit_ipv4) permitaf |= adns_qf_want_ipv4;
530 if (ads->iflags & adns_if_permit_ipv6) permitaf |= adns_qf_want_ipv6;
531 if (qf & permitaf) qf &= permitaf | ~adns_qf_want_allaf;
534 if (qf & adns_qf_want_ipv4) want |= addr_rf_a;
535 if (qf & adns_qf_want_ipv6) want |= addr_rf_aaaa;
540 static void icb_addr(adns_query parent, adns_query child);
542 static void addr_subqueries(adns_query qu, struct timeval now,
543 adns_queryflags qf_extra,
544 const byte *qd_dgram, int qd_dglen) {
547 adns_queryflags qf= (qu->flags & ~adns_qf_search) | qf_extra;
548 adns_rrtype qtf= qu->answer->type & adns__qtf_deref;
549 unsigned which= qu->ctx.tinfo.addr.want & ~qu->ctx.tinfo.addr.have;
552 memset(&ctx, 0, sizeof(ctx));
553 ctx.callback= icb_addr;
554 for (i=0; i<addr_nrrtypes; i++) {
555 if (!(which & (1 << i))) continue;
556 err= adns__mkquery_frdgram(qu->ads, &qu->vb, &id, qd_dgram,qd_dglen,
557 DNS_HDRSIZE, addr_all_rrtypes[i], qf);
558 if (err) goto x_error;
559 err= adns__internal_submit(qu->ads, &cqu, qu, &tinfo_addrsub,
560 addr_all_rrtypes[i] | qtf,
561 &qu->vb, id, qf, now, &ctx);
562 if (err) goto x_error;
563 cqu->answer->rrsz= qu->answer->rrsz;
565 qu->state= query_childw;
566 LIST_LINK_TAIL(qu->ads->childw, qu);
570 adns__query_fail(qu, err);
573 static adns_status addr_submit(adns_query parent, adns_query *query_r,
574 vbuf *qumsg_vb, int id, unsigned want,
575 adns_queryflags flags, struct timeval now,
577 /* This is effectively a substitute for adns__internal_submit, intended for
578 * the case where the caller (possibly) only wants a subset of the
579 * available record types. The memory management and callback rules are
580 * the same as for adns__internal_submit.
582 * Some differences: the query is linked onto the parent's children
583 * list before exit (though the parent's state is not changed, and
584 * it is not linked into the childw list queue); and we set the
585 * `tinfo' portion of the context structure (yes, modifying *ctx),
586 * since this is, in fact, the main purpose of this function.
589 adns_state ads= parent->ads;
592 adns_rrtype type= ((adns_r_addr & adns_rrt_reprmask) |
593 (parent->answer->type & ~adns_rrt_reprmask));
595 ctx->tinfo.addr.want= want;
596 ctx->tinfo.addr.have= 0;
597 err= adns__internal_submit(ads, &qu, parent, adns__findtype(adns_r_addr),
598 type, qumsg_vb, id, flags, now, ctx);
605 static adns_status append_addrs(adns_query qu, size_t rrsz,
606 adns_rr_addr **dp, int *dlen,
607 const adns_rr_addr *sp, int slen) {
608 /* Append a vector of slen addr records, each of size rrsz, starting at ap,
609 * to a vector starting at *dp, of length *dlen. On successful completion,
610 * *dp and *dlen are updated.
613 size_t drrsz= *dlen*rrsz, srrsz= slen*rrsz;
616 if (!slen) return adns_s_ok;
617 p= adns__alloc_interim(qu, drrsz + srrsz);
620 memcpy(p, *dp, drrsz);
621 adns__free_interim(qu, *dp);
623 memcpy(p + drrsz, sp, srrsz);
625 *dp= (adns_rr_addr *)p;
629 static void propagate_ttl(adns_query to, adns_query from)
630 { if (to->expires > from->expires) to->expires= from->expires; }
632 static adns_status copy_cname_from_child(adns_query parent, adns_query child) {
633 adns_answer *pans= parent->answer, *cans= child->answer;
634 size_t n= strlen(cans->cname) + 1;
636 pans->cname= adns__alloc_preserved(parent, n);
637 if (!pans->cname) R_NOMEM;
638 memcpy(pans->cname, cans->cname, n);
642 static void done_addr_type(adns_query qu, adns_rrtype type) {
643 unsigned f= addr_rrtypeflag(type);
644 assert(f); qu->ctx.tinfo.addr.have |= f;
647 static void icb_addr(adns_query parent, adns_query child) {
648 adns_state ads= parent->ads;
649 adns_answer *pans= parent->answer, *cans= child->answer;
655 propagate_ttl(parent, child);
657 if (!(child->flags & adns__qf_addr_cname) &&
658 (parent->flags & adns__qf_addr_answer) &&
659 (!!pans->cname != !!cans->cname ||
660 (pans->cname && strcmp(pans->cname, cans->cname)))) {
661 /* We've detected an inconsistency in CNAME records, and must deploy
666 /* The child has a CNAME record, but the parent doesn't. We must
667 * discard all of the parent's addresses, and substitute the child's.
670 assert(pans->rrsz == cans->rrsz);
671 adns__free_interim(parent, pans->rrs.bytes);
672 adns__transfer_interim(child, parent, cans->rrs.bytes);
673 pans->rrs.bytes= cans->rrs.bytes;
674 pans->nrrs= cans->nrrs;
675 parent->ctx.tinfo.addr.have= 0;
676 done_addr_type(parent, cans->type);
677 err= copy_cname_from_child(parent, child); if (err) goto x_err;
680 /* We've settled on the CNAME (now) associated with the parent, which
681 * already has appropriate address records. Build a query datagram for
682 * this name so that we can issue child queries for the missing address
683 * families. The child's vbuf looks handy for this.
685 err= adns__mkquery(ads, &child->vb, &id, pans->cname,
686 strlen(pans->cname), &tinfo_addrsub,
687 adns_r_addr, parent->flags);
690 /* Now cancel the remaining children, and try again with the CNAME we've
693 adns__cancel_children(parent);
694 r= gettimeofday(&now, 0); if (r) goto x_gtod;
695 qf= adns__qf_addr_cname;
696 if (!(parent->flags & adns_qf_cname_loose)) qf |= adns_qf_cname_forbid;
697 addr_subqueries(parent, now, qf, child->vb.buf, child->vb.used);
701 if (cans->cname && !pans->cname) {
702 err= copy_cname_from_child(parent, child);
706 if ((parent->flags & adns_qf_search) &&
707 !pans->cname && cans->status == adns_s_nxdomain) {
708 /* We're searching a list of suffixes, and the name doesn't exist. Try
712 adns__cancel_children(parent);
713 adns__free_interim(parent, pans->rrs.bytes);
714 pans->rrs.bytes= 0; pans->nrrs= 0;
715 r= gettimeofday(&now, 0); if (r) goto x_gtod;
716 adns__search_next(ads, parent, now);
720 if (cans->status && cans->status != adns_s_nodata)
721 { err= cans->status; goto x_err; }
723 assert(pans->rrsz == cans->rrsz);
724 err= append_addrs(parent, pans->rrsz,
725 &pans->rrs.addr, &pans->nrrs,
726 cans->rrs.addr, cans->nrrs);
728 done_addr_type(parent, cans->type);
730 if (parent->children.head) LIST_LINK_TAIL(ads->childw, parent);
731 else if (!pans->nrrs) adns__query_fail(parent, adns_s_nodata);
732 else adns__query_done(parent);
733 parent->flags |= adns__qf_addr_answer;
737 /* We have our own error handling, because adns__must_gettimeofday
738 * handles errors by calling adns_globalsystemfailure, which would
739 * reenter the query processing logic. */
740 adns__diag(ads, -1, parent, "gettimeofday failed: %s", strerror(errno));
741 err= adns_s_systemfail;
745 adns__query_fail(parent, err);
748 static void qs_addr(adns_query qu, struct timeval now) {
749 if (!qu->ctx.tinfo.addr.want) {
750 qu->ctx.tinfo.addr.want= addr_rrtypes(qu->ads, qu->answer->type,
752 qu->ctx.tinfo.addr.have= 0;
754 addr_subqueries(qu, now, 0, qu->query_dgram, qu->query_dglen);
758 * _domain (pap,csp,cs)
762 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
763 char **domain_r, parsedomain_flags flags) {
767 st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
768 pai->dgram,pai->dglen, cbyte_io, max);
770 if (!pai->qu->vb.used) return adns_s_invaliddata;
772 dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
775 dm[pai->qu->vb.used]= 0;
776 memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
782 static adns_status csp_domain(vbuf *vb, const char *domain) {
784 if (!*domain) CSP_ADDSTR(".");
788 static adns_status cs_domain(vbuf *vb, adns_rrtype rrt, const void *datap) {
789 const char *const *domainp= datap;
790 return csp_domain(vb,*domainp);
793 static adns_status pa_dom_raw(const parseinfo *pai, int cbyte,
794 int max, void *datap) {
798 st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
801 if (cbyte != max) return adns_s_invaliddata;
809 static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
810 int max, void *datap) {
814 st= pap_domain(pai, &cbyte, max, rrp,
815 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
818 if (cbyte != max) return adns_s_invaliddata;
823 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
826 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
827 unsigned *want_io, size_t addrsz,
828 int *cbyte_io, int count, int dmstart) {
830 unsigned typef, want= *want_io, need= want;
831 int type, class, rdlen, rdend, rdstart, ownermatched;
835 for (rri=0, naddrs=0; rri<count; rri++) {
836 st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram,
837 pai->dglen, cbyte_io,
838 &type, &class, &ttl, &rdlen, &rdstart,
839 pai->dgram, pai->dglen, dmstart, &ownermatched);
841 if (type==-1) continue;
842 if (!ownermatched || class != DNS_CLASS_IN) continue;
843 typef= addr_rrtypeflag(type);
844 if (!(want & typef)) continue;
846 if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) R_NOMEM;
847 adns__update_expires(pai->qu,ttl,pai->now);
848 rdend= rdstart + rdlen;
849 st= pap_addr(pai, type, addrsz, &rdstart, rdend,
850 (adns_rr_addr *)(pai->qu->vb.buf + naddrs*addrsz));
852 if (rdstart != rdend) return adns_s_invaliddata;
856 st= append_addrs(pai->qu, addrsz, &ha->addrs, &ha->naddrs,
857 (const adns_rr_addr *)pai->qu->vb.buf, naddrs);
859 ha->astatus= adns_s_ok;
862 adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf,
870 static void icb_hostaddr(adns_query parent, adns_query child) {
871 adns_answer *cans= child->answer;
872 adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr;
873 adns_state ads= parent->ads;
875 size_t addrsz= gsz_addr(0, parent->answer->type);
877 st= cans->status == adns_s_nodata ? adns_s_ok : cans->status;
879 propagate_ttl(parent, child);
881 assert(addrsz == cans->rrsz);
882 st= append_addrs(parent, addrsz,
883 &rrp->addrs, &rrp->naddrs,
884 cans->rrs.addr, cans->nrrs);
886 if (!rrp->naddrs) { st= adns_s_nodata; goto done; }
888 if (!adns__vbuf_ensure(&parent->vb, addrsz))
889 { st= adns_s_nomemory; goto done; }
890 adns__isort(rrp->addrs, rrp->naddrs, addrsz, parent->vb.buf,
895 adns__free_interim(parent, rrp->addrs);
897 rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : 0;
901 if (parent->children.head) {
902 LIST_LINK_TAIL(ads->childw,parent);
904 adns__query_done(parent);
908 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
909 int max, adns_rr_hostaddr *rrp) {
915 adns_queryflags nflags;
917 size_t addrsz= gsz_addr(0, pai->qu->answer->type);
919 dmstart= cbyte= *cbyte_io;
920 st= pap_domain(pai, &cbyte, max, &rrp->host,
921 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
925 rrp->astatus= adns_s_ok;
931 want= addr_rrtypes(pai->ads, pai->qu->answer->type, pai->qu->flags);
933 st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->nscount, dmstart);
935 if (!want) return adns_s_ok;
937 st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->arcount, dmstart);
939 if (!want) return adns_s_ok;
941 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
942 pai->dgram, pai->dglen, dmstart,
943 adns_r_addr, adns_qf_quoteok_query);
947 ctx.callback= icb_hostaddr;
948 ctx.pinfo.hostaddr= rrp;
950 nflags= adns_qf_quoteok_query | (pai->qu->flags & (adns_qf_want_allaf |
951 adns_qf_ipv6_mapv4));
952 if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
954 st= addr_submit(pai->qu, &nqu, &pai->qu->vb, id, want,
955 nflags, pai->now, &ctx);
961 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte,
962 int max, void *datap) {
963 adns_rr_hostaddr *rrp= datap;
966 st= pap_hostaddr(pai, &cbyte, max, rrp);
968 if (cbyte != max) return adns_s_invaliddata;
973 static int dip_hostaddr(adns_state ads,
974 const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
975 if (ap->astatus != bp->astatus) return ap->astatus;
976 if (ap->astatus) return 0;
978 return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa);
981 static int di_hostaddr(adns_state ads,
982 const void *datap_a, const void *datap_b) {
983 const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
985 return dip_hostaddr(ads, ap,bp);
988 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
990 size_t addrsz= gsz_addr(0, qu->answer->type);
992 adns__makefinal_str(qu,&rrp->host);
994 adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz);
998 static void mf_hostaddr(adns_query qu, void *datap) {
999 adns_rr_hostaddr *rrp= datap;
1001 mfp_hostaddr(qu,rrp);
1004 static adns_status csp_hostaddr(vbuf *vb, adns_rrtype rrt,
1005 const adns_rr_hostaddr *rrp) {
1010 size_t addrsz= gsz_addr(0, rrt);
1012 st= csp_domain(vb,rrp->host); if (st) return st;
1015 CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus));
1017 sprintf(buf," %d ",rrp->astatus);
1020 CSP_ADDSTR(adns_errabbrev(rrp->astatus));
1023 errstr= adns_strerror(rrp->astatus);
1024 st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st;
1026 if (rrp->naddrs >= 0) {
1028 for (i=0; i<rrp->naddrs; i++) {
1030 st= csp_addr(vb, (const void*)((const char*)rrp->addrs + addrsz*i));
1039 static adns_status cs_hostaddr(vbuf *vb, adns_rrtype rrt, const void *datap) {
1040 const adns_rr_hostaddr *rrp= datap;
1042 return csp_hostaddr(vb,rrt,rrp);
1049 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte,
1050 int max, void *datap) {
1051 const byte *dgram= pai->dgram;
1052 adns_rr_intstr *rrp= datap;
1056 if (cbyte+2 > max) return adns_s_invaliddata;
1059 st= pap_domain(pai, &cbyte, max, &rrp->str,
1060 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1063 if (cbyte != max) return adns_s_invaliddata;
1067 static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
1068 const adns_rr_intstr *ap= datap_a, *bp= datap_b;
1070 if (ap->i < bp->i) return 0;
1071 if (ap->i > bp->i) return 1;
1079 static adns_status pa_mx(const parseinfo *pai, int cbyte,
1080 int max, void *datap) {
1081 const byte *dgram= pai->dgram;
1082 adns_rr_inthostaddr *rrp= datap;
1086 if (cbyte+2 > max) return adns_s_invaliddata;
1089 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
1092 if (cbyte != max) return adns_s_invaliddata;
1096 static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
1097 const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
1099 if (ap->i < bp->i) return 0;
1100 if (ap->i > bp->i) return 1;
1101 return dip_hostaddr(ads, &ap->ha, &bp->ha);
1105 * _inthostaddr (mf,cs)
1108 static void mf_inthostaddr(adns_query qu, void *datap) {
1109 adns_rr_inthostaddr *rrp= datap;
1111 mfp_hostaddr(qu,&rrp->ha);
1114 static adns_status csp_intofinthost(vbuf *vb, int i) {
1117 if (i < 0 || i > 0xffff)
1118 /* currently only used for MX whose priorities are 16-bit */
1119 return adns_s_invaliddata;
1121 sprintf(buf,"%u ",i);
1126 static adns_status cs_inthostaddr(vbuf *vb, adns_rrtype rrt, const void *datap) {
1127 const adns_rr_inthostaddr *rrp= datap;
1130 st = csp_intofinthost(vb,rrp->i); if (st) return st;
1131 return csp_hostaddr(vb,rrt,&rrp->ha);
1138 static adns_status cs_inthost(vbuf *vb, adns_rrtype rrt, const void *datap) {
1139 const adns_rr_intstr *rrp= datap;
1142 st = csp_intofinthost(vb,rrp->i); if (st) return st;
1143 return csp_domain(vb,rrp->str);
1147 * _ptr (ckl,pa +icb_ptr)
1150 static adns_status ckl_ptr(adns_state ads, adns_queryflags flags,
1151 union checklabel_state *cls, qcontext *ctx,
1152 int labnum, const char *dgram,
1153 int labstart, int lablen) {
1155 if (!adns__revparse_label(&cls->ptr, labnum, dgram,labstart,lablen))
1156 return adns_s_querydomainwrong;
1158 if (!adns__revparse_done(&cls->ptr, dgram, labnum,
1159 &ctx->tinfo.ptr.rev_rrtype,
1160 &ctx->tinfo.ptr.addr))
1161 return adns_s_querydomainwrong;
1166 static void icb_ptr(adns_query parent, adns_query child) {
1167 adns_answer *cans= child->answer;
1168 const adns_sockaddr *queried;
1169 const unsigned char *found;
1170 adns_state ads= parent->ads;
1173 if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
1174 adns__query_fail(parent,adns_s_inconsistent);
1176 } else if (cans->status) {
1177 adns__query_fail(parent,cans->status);
1181 queried= &parent->ctx.tinfo.ptr.addr;
1182 for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) {
1183 if (adns__addrs_equal_raw(&queried->sa,
1184 parent->ctx.tinfo.ptr.addr.sa.sa_family,found)) {
1185 if (!parent->children.head) {
1186 adns__query_done(parent);
1189 LIST_LINK_TAIL(ads->childw,parent);
1195 adns__query_fail(parent,adns_s_inconsistent);
1198 static adns_status pa_ptr(const parseinfo *pai, int dmstart,
1199 int max, void *datap) {
1202 adns_rrtype rrtype= pai->qu->ctx.tinfo.ptr.rev_rrtype;
1208 st= pap_domain(pai, &cbyte, max, rrp,
1209 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1211 if (cbyte != max) return adns_s_invaliddata;
1213 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
1214 pai->dgram, pai->dglen, dmstart,
1215 rrtype, adns_qf_quoteok_query);
1219 ctx.callback= icb_ptr;
1220 memset(&ctx.pinfo,0,sizeof(ctx.pinfo));
1221 memset(&ctx.tinfo,0,sizeof(ctx.tinfo));
1222 st= adns__internal_submit(pai->ads, &nqu, pai->qu,
1223 adns__findtype(rrtype),
1224 rrtype, &pai->qu->vb, id,
1225 adns_qf_quoteok_query, pai->now, &ctx);
1235 static void mf_strpair(adns_query qu, void *datap) {
1236 adns_rr_strpair *rrp= datap;
1238 adns__makefinal_str(qu,&rrp->array[0]);
1239 adns__makefinal_str(qu,&rrp->array[1]);
1246 static void mf_intstrpair(adns_query qu, void *datap) {
1247 adns_rr_intstrpair *rrp= datap;
1249 adns__makefinal_str(qu,&rrp->array[0].str);
1250 adns__makefinal_str(qu,&rrp->array[1].str);
1257 static adns_status pa_hinfo(const parseinfo *pai, int cbyte,
1258 int max, void *datap) {
1259 adns_rr_intstrpair *rrp= datap;
1263 for (i=0; i<2; i++) {
1264 st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
1268 if (cbyte != max) return adns_s_invaliddata;
1274 * _mailbox (pap,cs +pap_mailbox822)
1277 static adns_status pap_mailbox822(const parseinfo *pai,
1278 int *cbyte_io, int max, char **mb_r) {
1279 int lablen, labstart, i, needquote, c, r, neednorm;
1280 const unsigned char *p;
1282 findlabel_state fls;
1288 adns__findlabel_start(&fls, pai->ads,
1290 pai->dgram, pai->dglen, max,
1291 *cbyte_io, cbyte_io);
1292 st= adns__findlabel_next(&fls,&lablen,&labstart);
1295 adns__vbuf_appendstr(vb,".");
1300 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
1302 if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
1303 if (c == '.' && !neednorm) neednorm= 1;
1304 else if (c==' ' || c>=127 || ctype_822special(c)) needquote++;
1308 if (needquote || neednorm) {
1309 r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
1310 adns__vbuf_appendq(vb,"\"",1);
1311 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
1313 if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1);
1314 adns__vbuf_appendq(vb,p,1);
1316 adns__vbuf_appendq(vb,"\"",1);
1318 r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
1321 r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
1323 st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
1327 str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
1328 memcpy(str,vb->buf,vb->used);
1334 static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
1336 if (pai->qu->typei->typekey & adns__qtf_mail822) {
1337 return pap_mailbox822(pai, cbyte_io, max, mb_r);
1339 return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok);
1343 static adns_status csp_mailbox(vbuf *vb, const char *mailbox) {
1344 return csp_domain(vb,mailbox);
1351 static adns_status pa_rp(const parseinfo *pai, int cbyte,
1352 int max, void *datap) {
1353 adns_rr_strpair *rrp= datap;
1356 st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
1359 st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
1362 if (cbyte != max) return adns_s_invaliddata;
1366 static adns_status cs_rp(vbuf *vb, adns_rrtype rrt, const void *datap) {
1367 const adns_rr_strpair *rrp= datap;
1370 st= csp_mailbox(vb,rrp->array[0]); if (st) return st;
1372 st= csp_domain(vb,rrp->array[1]); if (st) return st;
1381 static adns_status pa_soa(const parseinfo *pai, int cbyte,
1382 int max, void *datap) {
1383 adns_rr_soa *rrp= datap;
1384 const byte *dgram= pai->dgram;
1388 st= pap_domain(pai, &cbyte, max, &rrp->mname,
1389 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1392 st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
1395 if (cbyte+20 != max) return adns_s_invaliddata;
1397 for (i=0; i<5; i++) {
1399 (&rrp->serial)[i]= GET_L(cbyte, v);
1405 static void mf_soa(adns_query qu, void *datap) {
1406 adns_rr_soa *rrp= datap;
1408 adns__makefinal_str(qu,&rrp->mname);
1409 adns__makefinal_str(qu,&rrp->rname);
1412 static adns_status cs_soa(vbuf *vb, adns_rrtype rrt, const void *datap) {
1413 const adns_rr_soa *rrp= datap;
1418 st= csp_domain(vb,rrp->mname); if (st) return st;
1420 st= csp_mailbox(vb,rrp->rname); if (st) return st;
1422 for (i=0; i<5; i++) {
1423 if (rrp->serial > 0xffffffffUL)
1424 return adns_s_invaliddata;
1425 sprintf(buf," %lu",(&rrp->serial)[i]);
1433 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
1436 static adns_status ckl_srv(adns_state ads, adns_queryflags flags,
1437 union checklabel_state *cls, qcontext *ctx,
1438 int labnum, const char *dgram,
1439 int labstart, int lablen) {
1440 const char *label = dgram+labstart;
1442 if (flags & adns_qf_quoteok_query) return adns_s_ok;
1443 if (!lablen || label[0] != '_') return adns_s_querydomaininvalid;
1446 return adns__ckl_hostname(ads,flags, cls,ctx, labnum, dgram,labstart,lablen);
1449 static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max,
1451 /* might be adns_rr_srvraw* */) {
1452 const byte *dgram= pai->dgram;
1456 if ((*cbyte_io += 6) > max) return adns_s_invaliddata;
1458 rrp->priority= GET_W(cbyte, ti);
1459 rrp->weight= GET_W(cbyte, ti);
1460 rrp->port= GET_W(cbyte, ti);
1464 static adns_status pa_srvraw(const parseinfo *pai, int cbyte,
1465 int max, void *datap) {
1466 adns_rr_srvraw *rrp= datap;
1469 st= pap_srv_begin(pai,&cbyte,max,datap);
1472 st= pap_domain(pai, &cbyte, max, &rrp->host,
1473 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1476 if (cbyte != max) return adns_s_invaliddata;
1480 static adns_status pa_srvha(const parseinfo *pai, int cbyte,
1481 int max, void *datap) {
1482 adns_rr_srvha *rrp= datap;
1485 st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st;
1486 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st;
1487 if (cbyte != max) return adns_s_invaliddata;
1491 static void mf_srvraw(adns_query qu, void *datap) {
1492 adns_rr_srvraw *rrp= datap;
1493 adns__makefinal_str(qu, &rrp->host);
1496 static void mf_srvha(adns_query qu, void *datap) {
1497 adns_rr_srvha *rrp= datap;
1498 mfp_hostaddr(qu,&rrp->ha);
1501 static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) {
1502 const adns_rr_srvraw *ap= datap_a, *bp= datap_b;
1503 /* might be const adns_rr_svhostaddr* */
1505 if (ap->priority < bp->priority) return 0;
1506 if (ap->priority > bp->priority) return 1;
1510 static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp
1511 /* might be adns_rr_srvraw* */) {
1513 if (rrp->priority < 0 || rrp->priority > 0xffff ||
1514 rrp->weight < 0 || rrp->weight > 0xffff ||
1515 rrp->port < 0 || rrp->port > 0xffff)
1516 return adns_s_invaliddata;
1517 sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port);
1522 static adns_status cs_srvraw(vbuf *vb, adns_rrtype rrt, const void *datap) {
1523 const adns_rr_srvraw *rrp= datap;
1526 st= csp_srv_begin(vb,(const void*)rrp); if (st) return st;
1527 return csp_domain(vb,rrp->host);
1530 static adns_status cs_srvha(vbuf *vb, adns_rrtype rrt, const void *datap) {
1531 const adns_rr_srvha *rrp= datap;
1534 st= csp_srv_begin(vb,(const void*)datap); if (st) return st;
1535 return csp_hostaddr(vb,rrt,&rrp->ha);
1538 static void postsort_srv(adns_state ads, void *array, int nrrs,int rrsz,
1539 const struct typeinfo *typei) {
1540 /* we treat everything in the array as if it were an adns_rr_srvha
1541 * even though the array might be of adns_rr_srvraw. That's OK
1542 * because they have the same prefix, which is all we access.
1543 * We use rrsz, too, rather than naive array indexing, of course.
1545 char *workbegin, *workend, *search, *arrayend;
1546 const adns_rr_srvha *rr;
1547 union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp;
1548 int cpriority, totalweight, runtotal;
1551 assert(rrsz <= sizeof(rrtmp));
1552 for (workbegin= array, arrayend= workbegin + rrsz * nrrs;
1553 workbegin < arrayend;
1554 workbegin= workend) {
1555 cpriority= (rr=(void*)workbegin)->priority;
1557 for (workend= workbegin, totalweight= 0;
1558 workend < arrayend && (rr=(void*)workend)->priority == cpriority;
1560 totalweight += rr->weight;
1563 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1564 * cpriority. From now on, workbegin points to the `remaining'
1565 * records: we select one record at a time (RFC2782 `Usage rules'
1566 * and `Format of the SRV RR' subsection `Weight') to place at
1567 * workbegin (swapping with the one that was there, and then
1568 * advance workbegin. */
1570 workbegin + rrsz < workend; /* don't bother if just one */
1571 workbegin += rrsz) {
1573 randval= nrand48(ads->rand48xsubi);
1574 randval %= (totalweight + 1);
1575 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1576 * totalweight must be <= 2^26 so probability nonuniformity is
1577 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1578 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1581 for (search=workbegin, runtotal=0;
1582 (runtotal += (rr=(void*)search)->weight) < randval;
1584 assert(search < arrayend);
1585 totalweight -= rr->weight;
1586 if (search != workbegin) {
1587 memcpy(&rrtmp, workbegin, rrsz);
1588 memcpy(workbegin, search, rrsz);
1589 memcpy(search, &rrtmp, rrsz);
1594 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1595 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1596 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1604 static void mf_byteblock(adns_query qu, void *datap) {
1605 adns_rr_byteblock *rrp= datap;
1606 void *bytes= rrp->data;
1607 adns__makefinal_block(qu,&bytes,rrp->len);
1615 static adns_status pa_opaque(const parseinfo *pai, int cbyte,
1616 int max, void *datap) {
1617 adns_rr_byteblock *rrp= datap;
1619 rrp->len= max - cbyte;
1620 rrp->data= adns__alloc_interim(pai->qu, rrp->len);
1621 if (!rrp->data) R_NOMEM;
1622 memcpy(rrp->data, pai->dgram + cbyte, rrp->len);
1626 static adns_status cs_opaque(vbuf *vb, adns_rrtype rrt, const void *datap) {
1627 const adns_rr_byteblock *rrp= datap;
1632 if (rrp->len < 0 || rrp->len > 0xffff)
1633 return adns_s_invaliddata;
1635 sprintf(buf,"\\# %d",rrp->len);
1638 for (l= rrp->len, p= rrp->data;
1641 sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]);
1647 sprintf(buf," %02x",*p);
1657 static void mf_flat(adns_query qu, void *data) { }
1663 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1665 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1666 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1667 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1668 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1670 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1671 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1672 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1673 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1678 static const typeinfo typeinfos[] = {
1679 /* Must be in ascending order of rrtype ! */
1680 /* mem-mgmt code rrt fmt member parser comparer printer */
1682 FLAT_TYPE(a, "A", 0, inaddr, inaddr, inaddr,inaddr ),
1683 DEEP_TYPE(ns_raw, "NS", "raw",str, host_raw,0, domain ),
1684 DEEP_TYPE(cname, "CNAME", 0, str, dom_raw, 0, domain ),
1685 DEEP_TYPE(soa_raw,"SOA", "raw",soa, soa, 0, soa ),
1686 DEEP_TYPE(ptr_raw,"PTR", "raw",str, host_raw,0, domain ),
1687 DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,hinfo, 0, hinfo ),
1688 DEEP_TYPE(mx_raw, "MX", "raw",intstr, mx_raw, mx_raw,inthost ),
1689 DEEP_TYPE(txt, "TXT", 0, manyistr, txt, 0, txt ),
1690 DEEP_TYPE(rp_raw, "RP", "raw",strpair, rp, 0, rp ),
1691 FLAT_TYPE(aaaa, "AAAA", 0, in6addr, in6addr, in6addr,in6addr ),
1692 DEEP_TYPE(srv_raw,"SRV", "raw",srvraw , srvraw, srv, srvraw,
1693 .checklabel= ckl_srv, .postsort= postsort_srv),
1695 FLAT_TYPE(addr, "A", "addr", addr, addr, addr, addr,
1696 .getrrsz= gsz_addr, .query_send= qs_addr),
1697 DEEP_TYPE(ns, "NS", "+addr",hostaddr, hostaddr,hostaddr,hostaddr ),
1698 DEEP_TYPE(ptr, "PTR","checked",str, ptr, 0, domain,
1699 .checklabel= ckl_ptr),
1700 DEEP_TYPE(mx, "MX", "+addr",inthostaddr,mx, mx, inthostaddr, ),
1701 DEEP_TYPE(srv, "SRV","+addr",srvha, srvha, srv, srvha,
1702 .checklabel= ckl_srv, .postsort= postsort_srv),
1704 DEEP_TYPE(soa, "SOA","822", soa, soa, 0, soa ),
1705 DEEP_TYPE(rp, "RP", "822", strpair, rp, 0, rp ),
1708 static const typeinfo tinfo_addrsub =
1709 FLAT_TYPE(none, "<addr>","sub",addr, addr, 0, addr,
1710 .getrrsz= gsz_addr);
1712 static const typeinfo typeinfo_unknown=
1713 DEEP_TYPE(unknown,0, "unknown",byteblock,opaque, 0, opaque );
1715 const typeinfo *adns__findtype(adns_rrtype type) {
1716 const typeinfo *begin, *end, *mid;
1718 if (type & ~(adns_rrtype)0x63ffffff)
1719 /* 0x60000000 is reserved for `harmless' future expansion */
1722 if (type & adns_r_unknown) return &typeinfo_unknown;
1723 type &= adns_rrt_reprmask;
1725 begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
1727 while (begin < end) {
1728 mid= begin + ((end-begin)>>1);
1729 if (mid->typekey == type) return mid;
1730 if (type > mid->typekey) begin= mid+1;