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_sortlst_sa, dip_sockaddr,
56 * addr_rrtypes, 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;
266 const struct in6_addr *a6;
271 if (af == AF_INET6) {
273 if (IN6_IS_ADDR_V4MAPPED(a6)) {
274 a.v4.s_addr= htonl(((unsigned long)a6->s6_addr[12] << 24) |
275 ((unsigned long)a6->s6_addr[13] << 16) |
276 ((unsigned long)a6->s6_addr[14] << 8) |
277 ((unsigned long)a6->s6_addr[15] << 0));
282 for (i=0, slp=ads->sortlist;
284 !adns__addr_match_p(af,ad, slp->af,&slp->base,&slp->mask) &&
286 adns__addr_match_p(AF_INET,&a, slp->af,&slp->base,&slp->mask));
291 static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) {
294 if (!ads->nsortlist) return 0;
296 ai= search_sortlist(ads,af,a);
297 bi= search_sortlist(ads,af,b);
301 static int di_inaddr(adns_state ads,
302 const void *datap_a, const void *datap_b) {
303 return dip_genaddr(ads,AF_INET,datap_a,datap_b);
306 static adns_status csp_genaddr(vbuf *vb, int af, const void *p) {
307 char buf[ADNS_ADDR2TEXT_BUFLEN];
308 int len= sizeof(buf);
312 memset(&a, 0, sizeof(a));
313 a.addr.sa.sa_family= af;
314 adns__sockaddr_inject(p, 0, &a.addr.sa);
315 err= adns_addr2text(&a.addr.sa,0, buf,&len, 0); assert(!err);
320 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
321 return csp_genaddr(vb, AF_INET,datap);
325 * _in6addr (pa,di,cs)
328 static adns_status pa_in6addr(const parseinfo *pai, int cbyte,
329 int max, void *datap) {
330 struct in6_addr *storeto= datap;
332 if (max-cbyte != 16) return adns_s_invaliddata;
333 memcpy(storeto->s6_addr, pai->dgram + cbyte, 16);
337 static int di_in6addr(adns_state ads,
338 const void *datap_a, const void *datap_b) {
339 return dip_genaddr(ads,AF_INET6,datap_a,datap_b);
342 static adns_status cs_in6addr(vbuf *vb, const void *datap) {
343 return csp_genaddr(vb,AF_INET6,datap);
347 * _addr (pap,pa,di,div,csp,cs,gsz,qs
348 * +search_sortlist_sa, dip_sockaddr, addr_rrtypes, icb_addr)
351 static const typeinfo tinfo_addrsub;
353 #define ADDR_RRTYPES(_) _(a)
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 static adns_status pap_addr(const parseinfo *pai, int rrty, size_t rrsz,
381 int *cbyte_io, int max, adns_rr_addr *storeto) {
382 const byte *dgram= pai->dgram;
383 int af, addrlen, salen;
384 const void *oaddr= dgram + *cbyte_io;
385 int avail= max - *cbyte_io;
391 af= AF_INET; addrlen= 4;
392 addrp= &storeto->addr.inet.sin_addr;
393 salen= sizeof(storeto->addr.inet);
398 assert(offsetof(adns_rr_addr, addr) + salen <= rrsz);
399 if (addrlen < avail) return adns_s_invaliddata;
400 if (step < 0) step= addrlen;
402 memset(&storeto->addr, 0, salen);
404 storeto->addr.sa.sa_family= af;
405 memcpy(addrp, oaddr, addrlen);
410 static adns_status pa_addr(const parseinfo *pai, int cbyte,
411 int max, void *datap) {
412 int err= pap_addr(pai, pai->qu->answer->type & adns_rrt_typemask,
413 pai->qu->answer->rrsz, &cbyte, max, datap);
415 if (cbyte != max) return adns_s_invaliddata;
419 static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) {
421 adns__sockaddr_extract(sa, &a, 0);
422 return search_sortlist(ads, sa->sa_family, &a);
425 static int dip_sockaddr(adns_state ads,
426 const struct sockaddr *sa,
427 const struct sockaddr *sb) {
428 if (!ads->sortlist) return 0;
429 return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb);
432 static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
433 const adns_rr_addr *ap= datap_a, *bp= datap_b;
434 return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa);
437 static int div_addr(void *context, const void *datap_a, const void *datap_b) {
438 const adns_state ads= context;
440 return di_addr(ads, datap_a, datap_b);
443 static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
444 char buf[ADNS_ADDR2TEXT_BUFLEN];
445 int len= sizeof(buf);
448 switch (rrp->addr.inet.sin_family) {
453 CSP_ADDSTR("INET6 ");
456 err= adns_addr2text(&rrp->addr.sa,0, buf,&len, 0); assert(!err);
460 sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
467 static adns_status cs_addr(vbuf *vb, const void *datap) {
468 const adns_rr_addr *rrp= datap;
470 return csp_addr(vb,rrp);
473 static int gsz_addr(const typeinfo *typei, adns_rrtype type) {
474 return type & adns__qtf_bigaddr ?
475 sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only);
478 static unsigned addr_rrtypes(adns_state ads, adns_rrtype type,
479 adns_queryflags qf) {
480 /* Return a mask of addr_rf_... flags indicating which address families are
481 * wanted, given a query type and flags.
486 static void icb_addr(adns_query parent, adns_query child);
488 static void addr_subqueries(adns_query qu, struct timeval now,
489 adns_queryflags qf_extra,
490 const byte *qd_dgram, int qd_dglen) {
493 adns_queryflags qf= (qu->flags & ~adns_qf_search) | qf_extra;
494 adns_rrtype qtf= qu->answer->type & adns__qtf_deref;
495 unsigned which= qu->ctx.tinfo.addr.want & ~qu->ctx.tinfo.addr.have;
498 memset(&ctx, 0, sizeof(ctx));
499 ctx.callback= icb_addr;
500 for (i=0; i<addr_nrrtypes; i++) {
501 if (!(which & (1 << i))) continue;
502 err= adns__mkquery_frdgram(qu->ads, &qu->vb, &id, qd_dgram,qd_dglen,
503 DNS_HDRSIZE, addr_all_rrtypes[i], qf);
504 if (err) goto x_error;
505 err= adns__internal_submit(qu->ads, &cqu, &tinfo_addrsub,
506 addr_all_rrtypes[i] | qtf,
507 &qu->vb, id, qf, now, &ctx);
508 if (err) goto x_error;
509 cqu->answer->rrsz= qu->answer->rrsz;
511 LIST_LINK_TAIL_PART(qu->children, cqu,siblings.);
513 qu->state= query_childw;
514 LIST_LINK_TAIL(qu->ads->childw, qu);
518 adns__query_fail(qu, err);
521 static adns_status append_addrs(adns_query qu, size_t rrsz,
522 adns_rr_addr **dp, int *dlen,
523 const adns_rr_addr *sp, int slen) {
524 /* Append a vector of slen addr records, each of size rrsz, starting at ap,
525 * to a vector starting at *dp, of length *dlen. On successful completion,
526 * *dp and *dlen are updated.
529 size_t drrsz= *dlen*rrsz, srrsz= slen*rrsz;
532 if (!slen) return adns_s_ok;
533 p= adns__alloc_interim(qu, drrsz + srrsz);
536 memcpy(p, *dp, drrsz);
537 adns__free_interim(qu, *dp);
539 memcpy(p + drrsz, sp, srrsz);
541 *dp= (adns_rr_addr *)p;
545 static void propagate_ttl(adns_query to, adns_query from)
546 { if (to->expires > from->expires) to->expires= from->expires; }
548 static adns_status copy_cname_from_child(adns_query parent, adns_query child) {
549 adns_answer *pans= parent->answer, *cans= child->answer;
550 size_t n= strlen(cans->cname) + 1;
552 pans->cname= adns__alloc_preserved(parent, n);
553 if (!pans->cname) R_NOMEM;
554 memcpy(pans->cname, cans->cname, n);
558 static void done_addr_type(adns_query qu, adns_rrtype type) {
559 unsigned f= addr_rrtypeflag(type);
560 assert(f); qu->ctx.tinfo.addr.have |= f;
563 static void icb_addr(adns_query parent, adns_query child) {
564 adns_state ads= parent->ads;
565 adns_answer *pans= parent->answer, *cans= child->answer;
569 propagate_ttl(parent, child);
571 if (cans->cname && !pans->cname) {
572 err= copy_cname_from_child(parent, child);
576 if ((parent->flags & adns_qf_search) &&
577 !pans->cname && cans->status == adns_s_nxdomain) {
578 /* We're searching a list of suffixes, and the name doesn't exist. Try
582 adns__cancel_children(parent);
583 adns__free_interim(parent, pans->rrs.bytes);
584 pans->rrs.bytes= 0; pans->nrrs= 0;
585 if (gettimeofday(&now, 0)) goto x_gtod;
586 adns__search_next(ads, parent, now);
590 if (cans->status && cans->status != adns_s_nodata)
591 { err= cans->status; goto x_err; }
593 assert(pans->rrsz == cans->rrsz);
594 err= append_addrs(parent, pans->rrsz,
595 &pans->rrs.addr, &pans->nrrs,
596 cans->rrs.addr, cans->nrrs);
598 done_addr_type(parent, cans->type);
600 if (parent->children.head) LIST_LINK_TAIL(ads->childw, parent);
601 else if (!pans->nrrs) adns__query_fail(parent, adns_s_nodata);
602 else adns__query_done(parent);
606 adns__diag(ads, -1, parent, "gettimeofday failed: %s", strerror(errno));
607 err= adns_s_systemfail;
611 adns__query_fail(parent, err);
614 static void qs_addr(adns_query qu, struct timeval now) {
615 if (!qu->ctx.tinfo.addr.want) {
616 qu->ctx.tinfo.addr.want= addr_rrtypes(qu->ads, qu->answer->type,
618 qu->ctx.tinfo.addr.have= 0;
620 addr_subqueries(qu, now, 0, qu->query_dgram, qu->query_dglen);
624 * _domain (pap,csp,cs)
628 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
629 char **domain_r, parsedomain_flags flags) {
633 st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
634 pai->dgram,pai->dglen, cbyte_io, max);
636 if (!pai->qu->vb.used) return adns_s_invaliddata;
638 dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
641 dm[pai->qu->vb.used]= 0;
642 memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
648 static adns_status csp_domain(vbuf *vb, const char *domain) {
650 if (!*domain) CSP_ADDSTR(".");
654 static adns_status cs_domain(vbuf *vb, const void *datap) {
655 const char *const *domainp= datap;
656 return csp_domain(vb,*domainp);
659 static adns_status pa_dom_raw(const parseinfo *pai, int cbyte,
660 int max, void *datap) {
664 st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
667 if (cbyte != max) return adns_s_invaliddata;
675 static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
676 int max, void *datap) {
680 st= pap_domain(pai, &cbyte, max, rrp,
681 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
684 if (cbyte != max) return adns_s_invaliddata;
689 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
692 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
694 int *cbyte_io, int count, int dmstart) {
696 int type, class, rdlen, rdstart, rdend, ownermatched;
700 for (rri=0, naddrs=-1; rri<count; rri++) {
701 st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram,
702 pai->dglen, cbyte_io,
703 &type, &class, &ttl, &rdlen, &rdstart,
704 pai->dgram, pai->dglen, dmstart, &ownermatched);
706 if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) {
707 if (naddrs>0) break; else continue;
712 if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz))
714 adns__update_expires(pai->qu,ttl,pai->now);
715 rdend= rdstart + rdlen;
716 st= pap_addr(pai, adns_r_a, addrsz, &rdstart, rdend,
717 (adns_rr_addr *)(pai->qu->vb.buf + naddrs*addrsz));
719 if (rdstart != rdend) return adns_s_invaliddata;
723 ha->addrs= adns__alloc_interim(pai->qu, naddrs*addrsz);
724 if (!ha->addrs) R_NOMEM;
725 memcpy(ha->addrs, pai->qu->vb.buf, naddrs*addrsz);
727 ha->astatus= adns_s_ok;
729 adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf,
735 static void icb_hostaddr(adns_query parent, adns_query child) {
736 adns_answer *cans= child->answer;
737 adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr;
738 adns_state ads= parent->ads;
743 rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs;
744 rrp->addrs= cans->rrs.addr;
745 adns__transfer_interim(child, parent, rrp->addrs);
747 if (parent->children.head) {
748 LIST_LINK_TAIL(ads->childw,parent);
750 adns__query_done(parent);
754 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
755 int max, adns_rr_hostaddr *rrp) {
761 adns_queryflags nflags;
762 size_t addrsz= gsz_addr(0, pai->qu->answer->type);
764 dmstart= cbyte= *cbyte_io;
765 st= pap_domain(pai, &cbyte, max, &rrp->host,
766 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
770 rrp->astatus= adns_s_ok;
776 st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->nscount, dmstart);
778 if (rrp->naddrs != -1) return adns_s_ok;
780 st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->arcount, dmstart);
782 if (rrp->naddrs != -1) return adns_s_ok;
784 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
785 pai->dgram, pai->dglen, dmstart,
786 adns_r_addr, adns_qf_quoteok_query);
790 ctx.callback= icb_hostaddr;
791 ctx.pinfo.hostaddr= rrp;
792 memset(&ctx.tinfo, 0, sizeof(ctx.tinfo));
794 nflags= adns_qf_quoteok_query;
795 if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
797 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
798 ((adns_r_addr & adns_rrt_reprmask) |
799 (pai->qu->answer->type & ~adns_rrt_reprmask)),
800 &pai->qu->vb, id, nflags, pai->now, &ctx);
803 nqu->parent= pai->qu;
804 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
809 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte,
810 int max, void *datap) {
811 adns_rr_hostaddr *rrp= datap;
814 st= pap_hostaddr(pai, &cbyte, max, rrp);
816 if (cbyte != max) return adns_s_invaliddata;
821 static int dip_hostaddr(adns_state ads,
822 const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
823 if (ap->astatus != bp->astatus) return ap->astatus;
824 if (ap->astatus) return 0;
826 return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa);
829 static int di_hostaddr(adns_state ads,
830 const void *datap_a, const void *datap_b) {
831 const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
833 return dip_hostaddr(ads, ap,bp);
836 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
838 size_t addrsz= gsz_addr(0, qu->answer->type);
840 adns__makefinal_str(qu,&rrp->host);
842 adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz);
846 static void mf_hostaddr(adns_query qu, void *datap) {
847 adns_rr_hostaddr *rrp= datap;
849 mfp_hostaddr(qu,rrp);
852 static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
858 st= csp_domain(vb,rrp->host); if (st) return st;
861 CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus));
863 sprintf(buf," %d ",rrp->astatus);
866 CSP_ADDSTR(adns_errabbrev(rrp->astatus));
869 errstr= adns_strerror(rrp->astatus);
870 st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st;
872 if (rrp->naddrs >= 0) {
874 for (i=0; i<rrp->naddrs; i++) {
876 st= csp_addr(vb,&rrp->addrs[i]);
885 static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
886 const adns_rr_hostaddr *rrp= datap;
888 return csp_hostaddr(vb,rrp);
895 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte,
896 int max, void *datap) {
897 const byte *dgram= pai->dgram;
898 adns_rr_intstr *rrp= datap;
902 if (cbyte+2 > max) return adns_s_invaliddata;
905 st= pap_domain(pai, &cbyte, max, &rrp->str,
906 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
909 if (cbyte != max) return adns_s_invaliddata;
913 static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
914 const adns_rr_intstr *ap= datap_a, *bp= datap_b;
916 if (ap->i < bp->i) return 0;
917 if (ap->i > bp->i) return 1;
925 static adns_status pa_mx(const parseinfo *pai, int cbyte,
926 int max, void *datap) {
927 const byte *dgram= pai->dgram;
928 adns_rr_inthostaddr *rrp= datap;
932 if (cbyte+2 > max) return adns_s_invaliddata;
935 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
938 if (cbyte != max) return adns_s_invaliddata;
942 static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
943 const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
945 if (ap->i < bp->i) return 0;
946 if (ap->i > bp->i) return 1;
947 return dip_hostaddr(ads, &ap->ha, &bp->ha);
951 * _inthostaddr (mf,cs)
954 static void mf_inthostaddr(adns_query qu, void *datap) {
955 adns_rr_inthostaddr *rrp= datap;
957 mfp_hostaddr(qu,&rrp->ha);
960 static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
961 const adns_rr_inthostaddr *rrp= datap;
964 sprintf(buf,"%u ",rrp->i);
967 return csp_hostaddr(vb,&rrp->ha);
974 static adns_status cs_inthost(vbuf *vb, const void *datap) {
975 const adns_rr_intstr *rrp= datap;
978 sprintf(buf,"%u ",rrp->i);
980 return csp_domain(vb,rrp->str);
984 * _ptr (ckl,pa +icb_ptr)
987 static adns_status ckl_ptr(adns_state ads, adns_queryflags flags,
988 union checklabel_state *cls, qcontext *ctx,
989 int labnum, const char *label, int lablen) {
991 if (adns__revparse_label(&cls->ptr, labnum, label,lablen))
992 return adns_s_querydomainwrong;
994 if (adns__revparse_done(&cls->ptr, labnum,
995 &ctx->tinfo.ptr.rev_rrtype,
996 &ctx->tinfo.ptr.addr))
997 return adns_s_querydomainwrong;
1002 static void icb_ptr(adns_query parent, adns_query child) {
1003 adns_answer *cans= child->answer;
1004 const struct af_addr *queried;
1005 const unsigned char *found;
1006 adns_state ads= parent->ads;
1009 if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
1010 adns__query_fail(parent,adns_s_inconsistent);
1012 } else if (cans->status) {
1013 adns__query_fail(parent,cans->status);
1017 queried= &parent->ctx.tinfo.ptr.addr;
1018 for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) {
1019 if (adns__genaddr_equal_p(queried->af,&queried->addr,
1020 parent->ctx.tinfo.ptr.addr.af,found)) {
1021 if (!parent->children.head) {
1022 adns__query_done(parent);
1025 LIST_LINK_TAIL(ads->childw,parent);
1031 adns__query_fail(parent,adns_s_inconsistent);
1034 static adns_status pa_ptr(const parseinfo *pai, int dmstart,
1035 int max, void *datap) {
1038 adns_rrtype rrtype= pai->qu->ctx.tinfo.ptr.rev_rrtype;
1044 st= pap_domain(pai, &cbyte, max, rrp,
1045 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1047 if (cbyte != max) return adns_s_invaliddata;
1049 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
1050 pai->dgram, pai->dglen, dmstart,
1051 rrtype, adns_qf_quoteok_query);
1055 ctx.callback= icb_ptr;
1056 memset(&ctx.pinfo,0,sizeof(ctx.pinfo));
1057 memset(&ctx.tinfo,0,sizeof(ctx.tinfo));
1058 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(rrtype),
1059 rrtype, &pai->qu->vb, id,
1060 adns_qf_quoteok_query, pai->now, &ctx);
1063 nqu->parent= pai->qu;
1064 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
1072 static void mf_strpair(adns_query qu, void *datap) {
1073 adns_rr_strpair *rrp= datap;
1075 adns__makefinal_str(qu,&rrp->array[0]);
1076 adns__makefinal_str(qu,&rrp->array[1]);
1083 static void mf_intstrpair(adns_query qu, void *datap) {
1084 adns_rr_intstrpair *rrp= datap;
1086 adns__makefinal_str(qu,&rrp->array[0].str);
1087 adns__makefinal_str(qu,&rrp->array[1].str);
1094 static adns_status pa_hinfo(const parseinfo *pai, int cbyte,
1095 int max, void *datap) {
1096 adns_rr_intstrpair *rrp= datap;
1100 for (i=0; i<2; i++) {
1101 st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
1105 if (cbyte != max) return adns_s_invaliddata;
1111 * _mailbox (pap,cs +pap_mailbox822)
1114 static adns_status pap_mailbox822(const parseinfo *pai,
1115 int *cbyte_io, int max, char **mb_r) {
1116 int lablen, labstart, i, needquote, c, r, neednorm;
1117 const unsigned char *p;
1119 findlabel_state fls;
1125 adns__findlabel_start(&fls, pai->ads,
1127 pai->dgram, pai->dglen, max,
1128 *cbyte_io, cbyte_io);
1129 st= adns__findlabel_next(&fls,&lablen,&labstart);
1131 adns__vbuf_appendstr(vb,".");
1136 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
1138 if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
1139 if (c == '.' && !neednorm) neednorm= 1;
1140 else if (c==' ' || c>=127 || ctype_822special(c)) needquote++;
1144 if (needquote || neednorm) {
1145 r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
1146 adns__vbuf_appendq(vb,"\"",1);
1147 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
1149 if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1);
1150 adns__vbuf_appendq(vb,p,1);
1152 adns__vbuf_appendq(vb,"\"",1);
1154 r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
1157 r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
1159 st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
1163 str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
1164 memcpy(str,vb->buf,vb->used);
1170 static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
1172 if (pai->qu->typei->typekey & adns__qtf_mail822) {
1173 return pap_mailbox822(pai, cbyte_io, max, mb_r);
1175 return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok);
1179 static adns_status csp_mailbox(vbuf *vb, const char *mailbox) {
1180 return csp_domain(vb,mailbox);
1187 static adns_status pa_rp(const parseinfo *pai, int cbyte,
1188 int max, void *datap) {
1189 adns_rr_strpair *rrp= datap;
1192 st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
1195 st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
1198 if (cbyte != max) return adns_s_invaliddata;
1202 static adns_status cs_rp(vbuf *vb, const void *datap) {
1203 const adns_rr_strpair *rrp= datap;
1206 st= csp_mailbox(vb,rrp->array[0]); if (st) return st;
1208 st= csp_domain(vb,rrp->array[1]); if (st) return st;
1217 static adns_status pa_soa(const parseinfo *pai, int cbyte,
1218 int max, void *datap) {
1219 adns_rr_soa *rrp= datap;
1220 const byte *dgram= pai->dgram;
1224 st= pap_domain(pai, &cbyte, max, &rrp->mname,
1225 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1228 st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
1231 if (cbyte+20 != max) return adns_s_invaliddata;
1233 for (i=0; i<5; i++) {
1236 (&rrp->serial)[i]= (msw<<16) | lsw;
1242 static void mf_soa(adns_query qu, void *datap) {
1243 adns_rr_soa *rrp= datap;
1245 adns__makefinal_str(qu,&rrp->mname);
1246 adns__makefinal_str(qu,&rrp->rname);
1249 static adns_status cs_soa(vbuf *vb, const void *datap) {
1250 const adns_rr_soa *rrp= datap;
1255 st= csp_domain(vb,rrp->mname); if (st) return st;
1257 st= csp_mailbox(vb,rrp->rname); if (st) return st;
1259 for (i=0; i<5; i++) {
1260 sprintf(buf," %lu",(&rrp->serial)[i]);
1268 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
1271 static adns_status ckl_srv(adns_state ads, adns_queryflags flags,
1272 union checklabel_state *cls, qcontext *ctx,
1273 int labnum, const char *label, int lablen) {
1274 if (labnum < 2 && !(flags & adns_qf_quoteok_query)) {
1275 if (!lablen || label[0] != '_') return adns_s_querydomaininvalid;
1278 return adns__ckl_hostname(ads, flags, cls, ctx, labnum, label, lablen);
1281 static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max,
1283 /* might be adns_rr_srvraw* */) {
1284 const byte *dgram= pai->dgram;
1288 if ((*cbyte_io += 6) > max) return adns_s_invaliddata;
1290 rrp->priority= GET_W(cbyte, ti);
1291 rrp->weight= GET_W(cbyte, ti);
1292 rrp->port= GET_W(cbyte, ti);
1296 static adns_status pa_srvraw(const parseinfo *pai, int cbyte,
1297 int max, void *datap) {
1298 adns_rr_srvraw *rrp= datap;
1301 st= pap_srv_begin(pai,&cbyte,max,datap);
1304 st= pap_domain(pai, &cbyte, max, &rrp->host,
1305 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1308 if (cbyte != max) return adns_s_invaliddata;
1312 static adns_status pa_srvha(const parseinfo *pai, int cbyte,
1313 int max, void *datap) {
1314 adns_rr_srvha *rrp= datap;
1317 st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st;
1318 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st;
1319 if (cbyte != max) return adns_s_invaliddata;
1323 static void mf_srvraw(adns_query qu, void *datap) {
1324 adns_rr_srvraw *rrp= datap;
1325 adns__makefinal_str(qu, &rrp->host);
1328 static void mf_srvha(adns_query qu, void *datap) {
1329 adns_rr_srvha *rrp= datap;
1330 mfp_hostaddr(qu,&rrp->ha);
1333 static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) {
1334 const adns_rr_srvraw *ap= datap_a, *bp= datap_b;
1335 /* might be const adns_rr_svhostaddr* */
1337 if (ap->priority < bp->priority) return 0;
1338 if (ap->priority > bp->priority) return 1;
1342 static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp
1343 /* might be adns_rr_srvraw* */) {
1345 sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port);
1350 static adns_status cs_srvraw(vbuf *vb, const void *datap) {
1351 const adns_rr_srvraw *rrp= datap;
1354 st= csp_srv_begin(vb,(const void*)rrp); if (st) return st;
1355 return csp_domain(vb,rrp->host);
1358 static adns_status cs_srvha(vbuf *vb, const void *datap) {
1359 const adns_rr_srvha *rrp= datap;
1362 st= csp_srv_begin(vb,(const void*)datap); if (st) return st;
1363 return csp_hostaddr(vb,&rrp->ha);
1366 static void postsort_srv(adns_state ads, void *array, int nrrs,int rrsz,
1367 const struct typeinfo *typei) {
1368 /* we treat everything in the array as if it were an adns_rr_srvha
1369 * even though the array might be of adns_rr_srvraw. That's OK
1370 * because they have the same prefix, which is all we access.
1371 * We use rrsz, too, rather than naive array indexing, of course.
1373 char *workbegin, *workend, *search, *arrayend;
1374 const adns_rr_srvha *rr;
1375 union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp;
1376 int cpriority, totalweight, runtotal;
1379 assert(rrsz <= sizeof(rrtmp));
1380 for (workbegin= array, arrayend= workbegin + rrsz * nrrs;
1381 workbegin < arrayend;
1382 workbegin= workend) {
1383 cpriority= (rr=(void*)workbegin)->priority;
1385 for (workend= workbegin, totalweight= 0;
1386 workend < arrayend && (rr=(void*)workend)->priority == cpriority;
1388 totalweight += rr->weight;
1391 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1392 * cpriority. From now on, workbegin points to the `remaining'
1393 * records: we select one record at a time (RFC2782 `Usage rules'
1394 * and `Format of the SRV RR' subsection `Weight') to place at
1395 * workbegin (swapping with the one that was there, and then
1396 * advance workbegin. */
1398 workbegin + rrsz < workend; /* don't bother if just one */
1399 workbegin += rrsz) {
1401 randval= nrand48(ads->rand48xsubi);
1402 randval %= (totalweight + 1);
1403 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1404 * totalweight must be <= 2^26 so probability nonuniformity is
1405 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1406 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1409 for (search=workbegin, runtotal=0;
1410 (runtotal += (rr=(void*)search)->weight) < randval;
1412 assert(search < arrayend);
1413 totalweight -= rr->weight;
1414 if (search != workbegin) {
1415 memcpy(&rrtmp, workbegin, rrsz);
1416 memcpy(workbegin, search, rrsz);
1417 memcpy(search, &rrtmp, rrsz);
1422 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1423 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1424 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1432 static void mf_byteblock(adns_query qu, void *datap) {
1433 adns_rr_byteblock *rrp= datap;
1434 void *bytes= rrp->data;
1435 adns__makefinal_block(qu,&bytes,rrp->len);
1443 static adns_status pa_opaque(const parseinfo *pai, int cbyte,
1444 int max, void *datap) {
1445 adns_rr_byteblock *rrp= datap;
1447 rrp->len= max - cbyte;
1448 rrp->data= adns__alloc_interim(pai->qu, rrp->len);
1449 if (!rrp->data) R_NOMEM;
1450 memcpy(rrp->data, pai->dgram + cbyte, rrp->len);
1454 static adns_status cs_opaque(vbuf *vb, const void *datap) {
1455 const adns_rr_byteblock *rrp= datap;
1460 sprintf(buf,"\\# %d",rrp->len);
1463 for (l= rrp->len, p= rrp->data;
1466 sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]);
1472 sprintf(buf," %02x",*p);
1482 static void mf_flat(adns_query qu, void *data) { }
1488 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1490 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1491 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1492 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1493 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1495 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1496 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1497 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1498 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1503 static const typeinfo typeinfos[] = {
1504 /* Must be in ascending order of rrtype ! */
1505 /* mem-mgmt code rrt fmt member parser comparer printer */
1507 FLAT_TYPE(a, "A", 0, inaddr, inaddr, inaddr,inaddr ),
1508 DEEP_TYPE(ns_raw, "NS", "raw",str, host_raw,0, domain ),
1509 DEEP_TYPE(cname, "CNAME", 0, str, dom_raw, 0, domain ),
1510 DEEP_TYPE(soa_raw,"SOA", "raw",soa, soa, 0, soa ),
1511 DEEP_TYPE(ptr_raw,"PTR", "raw",str, host_raw,0, domain ),
1512 DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,hinfo, 0, hinfo ),
1513 DEEP_TYPE(mx_raw, "MX", "raw",intstr, mx_raw, mx_raw,inthost ),
1514 DEEP_TYPE(txt, "TXT", 0, manyistr, txt, 0, txt ),
1515 DEEP_TYPE(rp_raw, "RP", "raw",strpair, rp, 0, rp ),
1516 FLAT_TYPE(aaaa, "AAAA", 0, in6addr, in6addr, in6addr,in6addr ),
1517 DEEP_TYPE(srv_raw,"SRV", "raw",srvraw , srvraw, srv, srvraw,
1518 .checklabel= ckl_srv, .postsort= postsort_srv),
1520 FLAT_TYPE(addr, "A", "addr", addr, addr, addr, addr,
1521 .getrrsz= gsz_addr, .query_send= qs_addr),
1522 DEEP_TYPE(ns, "NS", "+addr",hostaddr, hostaddr,hostaddr,hostaddr ),
1523 DEEP_TYPE(ptr, "PTR","checked",str, ptr, 0, domain,
1524 .checklabel= ckl_ptr),
1525 DEEP_TYPE(mx, "MX", "+addr",inthostaddr,mx, mx, inthostaddr, ),
1526 DEEP_TYPE(srv, "SRV","+addr",srvha, srvha, srv, srvha,
1527 .checklabel= ckl_srv, .postsort= postsort_srv),
1529 DEEP_TYPE(soa, "SOA","822", soa, soa, 0, soa ),
1530 DEEP_TYPE(rp, "RP", "822", strpair, rp, 0, rp ),
1533 static const typeinfo tinfo_addrsub =
1534 FLAT_TYPE(none, "<addr>","sub",addr, addr, 0, addr,
1535 .getrrsz= gsz_addr);
1537 static const typeinfo typeinfo_unknown=
1538 DEEP_TYPE(unknown,0, "unknown",byteblock,opaque, 0, opaque );
1540 const typeinfo *adns__findtype(adns_rrtype type) {
1541 const typeinfo *begin, *end, *mid;
1543 if (type & adns_r_unknown) return &typeinfo_unknown;
1544 type &= adns_rrt_reprmask;
1546 begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
1548 while (begin < end) {
1549 mid= begin + ((end-begin)>>1);
1550 if (mid->typekey == type) return mid;
1551 if (type > mid->typekey) begin= mid+1;