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.
29 #include <sys/types.h>
30 #include <sys/socket.h>
31 #include <netinet/in.h>
32 #include <arpa/inet.h>
36 #define R_NOMEM return adns_s_nomemory
37 #define CSP_ADDSTR(s) do { \
38 if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \
45 * _textdata, _qstring (csp)
52 * _addr (sh,di,csp,cs)
55 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
58 * _srv_raw (pa,di,mf,cs)
60 * _inthostaddr (mf,cs)
65 * _mailbox (pap +pap_mailbox822)
68 * _srv* (qdpl,(pap),pa,mf,di,(csp),cs,postsort)
73 * within each section:
90 static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max,
91 int *len_r, char **str_r) {
92 /* Neither len_r nor str_r may be null.
93 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
95 const byte *dgram= pai->dgram;
101 if (cbyte >= max) return adns_s_invaliddata;
103 if (cbyte+l > max) return adns_s_invaliddata;
105 str= adns__alloc_interim(pai->qu, l+1);
109 memcpy(str,dgram+cbyte,l);
118 static adns_status csp_qstring(vbuf *vb, const char *dp, int len) {
124 for (cn=0; cn<len; cn++) {
128 } else if (ch == '"') {
130 } else if (ch >= 32 && ch <= 126) {
131 if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
133 sprintf(buf,"\\x%02x",ch);
146 static void mf_str(adns_query qu, void *datap) {
149 adns__makefinal_str(qu,rrp);
156 static void mf_intstr(adns_query qu, void *datap) {
157 adns_rr_intstr *rrp= datap;
159 adns__makefinal_str(qu,&rrp->str);
166 static void mf_manyistr(adns_query qu, void *datap) {
167 adns_rr_intstr **rrp= datap;
168 adns_rr_intstr *te, *table;
172 for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
174 adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
176 for (te= *rrp; te->i >= 0; te++)
177 adns__makefinal_str(qu,&te->str);
184 static adns_status pa_txt(const parseinfo *pai, int cbyte,
185 int max, void *datap) {
186 adns_rr_intstr **rrp= datap, *table, *te;
187 const byte *dgram= pai->dgram;
188 int ti, tc, l, startbyte;
192 if (cbyte >= max) return adns_s_invaliddata;
194 while (cbyte < max) {
199 if (cbyte != max || !tc) return adns_s_invaliddata;
201 table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
204 for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
205 st= pap_qstring(pai, &cbyte, max, &te->i, &te->str);
208 assert(cbyte == max);
217 static adns_status cs_txt(vbuf *vb, const void *datap) {
218 const adns_rr_intstr *const *rrp= datap;
219 const adns_rr_intstr *current;
223 for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) {
224 if (spc) CSP_ADDSTR(" ");
225 st= csp_qstring(vb,current->str,current->i); if (st) return st;
234 static adns_status cs_hinfo(vbuf *vb, const void *datap) {
235 const adns_rr_intstrpair *rrp= datap;
238 st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st;
240 st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st;
245 * _inaddr (pa,dip,di)
248 static adns_status pa_inaddr(const parseinfo *pai, int cbyte,
249 int max, void *datap) {
250 struct in_addr *storeto= datap;
252 if (max-cbyte != 4) return adns_s_invaliddata;
253 memcpy(storeto, pai->dgram + cbyte, 4);
257 static int search_sortlist_in(adns_state ads, struct in_addr ad) {
258 const struct sortlist *slp;
261 for (i=0, slp=ads->sortlist;
264 if (slp->family == AF_INET) {
266 mask.s_addr = htonl(-1 << slp->prefix);
267 if ( (ad.s_addr & mask.s_addr ) == slp->base.inet.s_addr)
274 static int dip_inaddr(adns_state ads, struct in_addr a, struct in_addr b) {
277 if (!ads->nsortlist) return 0;
279 ai= search_sortlist_in(ads,a);
280 bi= search_sortlist_in(ads,b);
284 static int di_inaddr(adns_state ads,
285 const void *datap_a, const void *datap_b) {
286 const struct in_addr *ap= datap_a, *bp= datap_b;
288 return dip_inaddr(ads,*ap,*bp);
291 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
292 const struct in_addr *rrp= datap, rr= *rrp;
295 ia= inet_ntoa(rr); assert(ia);
301 * _in6addr (pa,dip,di)
304 static adns_status pa_in6addr(const parseinfo *pai, int cbyte,
305 int max, void *datap) {
306 struct in_addr *storeto= datap;
308 if (max-cbyte != 16) return adns_s_invaliddata;
309 memcpy(storeto, pai->dgram + cbyte, 16);
313 static int search_sortlist_in6(adns_state ads, const struct in6_addr *ad) {
314 const struct sortlist *slp;
317 for (i=0, slp=ads->sortlist;
320 if (slp->family == AF_INET6) {
321 int pb = slp->prefix / 8;
322 int mask = 0xff & (-1 << (slp->prefix % 8));
323 if (memcmp(ad->s6_addr, slp->base.inet6.s6_addr, pb) == 0
325 || (ad->s6_addr[pb] & mask) == slp->base.inet6.s6_addr[pb]))
332 static int dip_in6addr(adns_state ads,
333 const struct in6_addr *a, const struct in6_addr *b) {
336 if (!ads->nsortlist) return 0;
338 ai= search_sortlist_in6(ads,a);
339 bi= search_sortlist_in6(ads,b);
343 static int di_in6addr(adns_state ads,
344 const void *datap_a, const void *datap_b) {
345 const struct in6_addr *ap= datap_a, *bp= datap_b;
347 return dip_in6addr(ads,ap,bp);
351 static adns_status cs_in6addr(vbuf *vb, const void *datap) {
352 char buf[INET6_ADDRSTRLEN];
355 ia= inet_ntop(AF_INET6, datap, buf, sizeof(buf)); assert(ia);
361 * _addr (sh,pa,di,csp,cs)
364 static void mk_mapped_ipv6(struct sockaddr_in6 *sa, const struct in_addr *in) {
365 memset(sa, 0, sizeof(*sa));
366 sa->sin6_family = AF_INET6;
367 sa->sin6_addr.s6_addr16[5] = 0xffff;
368 sa->sin6_addr.s6_addr32[3] = in->s_addr;
371 static void icb_addr(adns_query parent, adns_query child) {
372 adns_answer *cans= child->answer;
373 adns_answer *pans= parent->answer;
374 adns_state ads= parent->ads;
379 if (parent->expires > child->expires) parent->expires = child->expires;
381 if (cans->status == adns_s_nxdomain) {
382 adns__query_fail(parent,cans->status);
385 if (cans->status == adns_s_nodata && parent->children.head) {
386 /* We may get records from the remaining queries */
387 LIST_LINK_TAIL(ads->childw,parent);
392 adns__query_done(parent);
394 adns__query_fail(parent,cans->status);
400 /* Copy CNAME. CNAME must be consistent for both queries. */
401 if (cans->cname && pans->cname) {
402 if (strcmp(cans->cname, pans->cname)) {
403 adns__query_fail(parent, adns_s_inconsistent);
407 else if (pans->cname) {
408 adns__query_fail(parent, adns_s_inconsistent);
411 else if (cans->cname) {
414 adns__query_fail(parent, adns_s_inconsistent);
417 len = strlen(cans->cname) + 1;
418 pans->cname = adns__alloc_preserved(parent, len);
420 adns__query_fail(parent, adns_s_nomemory);
423 memcpy(pans->cname, cans->cname, len);
427 void *p = adns__realloc_interim(parent,pans->rrs.untyped,
428 sizeof(adns_rr_addr) * (cans->nrrs + pans->nrrs));
430 adns__query_fail(parent, adns_s_nomemory);
433 pans->rrs.untyped = p;
434 addr = pans->rrs.addr + pans->nrrs;
435 pans->nrrs += cans->nrrs;
439 = adns__alloc_interim(parent,sizeof(adns_rr_addr) * cans->nrrs);
440 if (!pans->rrs.untyped) {
441 adns__query_fail(parent,adns_s_nomemory);
444 pans->nrrs = cans->nrrs;
445 addr = pans->rrs.addr;
448 switch (cans->type) {
451 if (parent->flags & adns_qf_ip6mapped)
452 for (i = 0; i<cans->nrrs; i++) {
453 addr[i].len = sizeof(struct sockaddr_in6);
454 mk_mapped_ipv6(&addr[i].addr.inet6, &cans->rrs.inaddr[i]);
457 for (i = 0; i<cans->nrrs; i++) {
458 addr[i].len = sizeof(struct sockaddr_in);
459 memset(&addr[i].addr.inet, 0, sizeof(addr[i].addr.inet));
460 addr[i].addr.inet.sin_family = AF_INET;
461 addr[i].addr.inet.sin_addr = cans->rrs.inaddr[i];
465 for (i = 0; i<cans->nrrs; i++) {
466 addr[i].len = sizeof(struct sockaddr_in6);
467 memset(&addr[i].addr.inet6, 0, sizeof(addr[i].addr.inet6));
468 addr[i].addr.inet6.sin6_family = AF_INET6;
469 addr[i].addr.inet6.sin6_addr = cans->rrs.in6addr[i];
474 if (!parent->children.head) {
475 adns__query_done(parent);
478 LIST_LINK_TAIL(ads->childw,parent);
483 static void sh_addr(adns_query qu,
484 adns_queryflags flags, struct timeval now)
492 assert(flags & adns__qf_ip_mask);
494 /* Must have a non-negative id, or else adns__internal_check will
495 * think that we are on the output queue. */
499 ctx.callback= icb_addr;
500 /* What to store in ctx.info? */
502 adns__vbuf_init(&vb);
504 if (flags & adns_qf_ip4) { /* A query */
505 st= adns__mkquery_frlabels(qu->ads, &vb, &id,
506 qu->vb.buf, qu->vb.used, adns_r_a, flags);
507 if (st) { adns__query_fail(qu, st); return; }
509 st= adns__internal_submit(qu->ads, &nqu, adns__findtype(adns_r_a),
510 &vb, id, flags, now, &ctx);
511 if (st) { adns__query_fail(qu, st); return; }
514 LIST_LINK_TAIL_PART(qu->children,nqu,siblings.);
517 if (flags & adns_qf_ip6) { /* AAAA query */
518 st= adns__mkquery_frlabels(qu->ads, &vb, &id,
519 qu->vb.buf, qu->vb.used, adns_r_aaaa, flags);
520 if (st) { adns__query_fail(qu, st); return; }
522 st= adns__internal_submit(qu->ads, &nqu, adns__findtype(adns_r_aaaa),
523 &vb, id, flags, now, &ctx);
524 if (st) { adns__query_fail(qu, st); return; }
527 LIST_LINK_TAIL_PART(qu->children,nqu,siblings.);
529 assert(qu->children.head);
532 static adns_status pap_addr(const parseinfo *pai, adns_rrtype type, int cbyte,
533 int max, adns_rr_addr *rr) {
535 const byte *dgram= pai->dgram;
536 adns_queryflags flags = pai->qu->flags;
542 assert(flags & adns_qf_ip4);
544 if (max-cbyte != 4) return adns_s_invaliddata;
546 if (flags & adns_qf_ip6mapped) {
547 rr->len = sizeof(struct sockaddr_in6);
548 mk_mapped_ipv6(&rr->addr.inet6, (const struct in_addr *) (dgram+cbyte));
551 rr->len= sizeof(rr->addr.inet);
552 memset(&rr->addr.inet,0,sizeof(rr->addr.inet));
553 rr->addr.inet.sin_family= AF_INET;
554 memcpy(&rr->addr.inet.sin_addr,dgram+cbyte,4);
558 assert(flags & adns_qf_ip6);
560 if (max-cbyte != 16) return adns_s_invaliddata;
562 rr->len= sizeof(rr->addr.inet6);
563 memset(&rr->addr,0,sizeof(rr->addr.inet6));
564 rr->addr.inet6.sin6_family= AF_INET6;
565 memcpy(&rr->addr.inet6.sin6_addr,dgram+cbyte,16);
573 static int search_sortlist_addr(adns_state ads, const adns_rr_addr *ad) {
574 switch(ad->addr.sa.sa_family) {
576 case AF_INET: return search_sortlist_in(ads, ad->addr.inet.sin_addr);
577 case AF_INET6: return search_sortlist_in6(ads, &ad->addr.inet6.sin6_addr);
581 static int dip_addr(adns_state ads,
582 const adns_rr_addr *a, const adns_rr_addr *b) {
584 ai = search_sortlist_addr(ads, a);
585 bi = search_sortlist_addr(ads, b);
589 static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
590 const adns_rr_addr *ap= datap_a, *bp= datap_b;
591 return dip_addr(ads, ap, bp);
594 static int div_addr(void *context, const void *datap_a, const void *datap_b) {
595 const adns_state ads= context;
597 return di_addr(ads, datap_a, datap_b);
600 static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
602 char buf[INET6_ADDRSTRLEN];
604 switch (rrp->addr.inet.sin_family) {
607 ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia);
611 CSP_ADDSTR("INET6 ");
612 ia= inet_ntop(AF_INET6, &rrp->addr.inet6.sin6_addr,
613 buf, sizeof(buf)); assert(ia);
617 sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
624 static adns_status cs_addr(vbuf *vb, const void *datap) {
625 const adns_rr_addr *rrp= datap;
627 return csp_addr(vb,rrp);
631 * _domain (pap,csp,cs)
635 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
636 char **domain_r, parsedomain_flags flags) {
640 st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
641 pai->dgram,pai->dglen, cbyte_io, max);
643 if (!pai->qu->vb.used) return adns_s_invaliddata;
645 dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
648 dm[pai->qu->vb.used]= 0;
649 memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
655 static adns_status csp_domain(vbuf *vb, const char *domain) {
657 if (!*domain) CSP_ADDSTR(".");
661 static adns_status cs_domain(vbuf *vb, const void *datap) {
662 const char *const *domainp= datap;
663 return csp_domain(vb,*domainp);
666 static adns_status pa_dom_raw(const parseinfo *pai, int cbyte,
667 int max, void *datap) {
671 st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
674 if (cbyte != max) return adns_s_invaliddata;
682 static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
683 int max, void *datap) {
687 st= pap_domain(pai, &cbyte, max, rrp,
688 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
691 if (cbyte != max) return adns_s_invaliddata;
696 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
699 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
700 int *cbyte_io, int count, int dmstart) {
702 int type, class, rdlen, rdstart, ownermatched;
706 for (rri=0, naddrs=-1; rri<count; rri++) {
707 st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram,
708 pai->dglen, cbyte_io,
709 &type, &class, &ttl, &rdlen, &rdstart,
710 pai->dgram, pai->dglen, dmstart, &ownermatched);
712 if (!ownermatched || class != DNS_CLASS_IN) {
713 if (naddrs>0) break; else continue;
715 if (! ((type == adns_r_a && (pai->qu->flags & adns_qf_ip4))
716 || (type == adns_r_aaaa && (pai->qu->flags & adns_qf_ip6)))) {
717 if (naddrs>0) break; else continue;
723 if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_rr_addr)))
725 adns__update_expires(pai->qu,ttl,pai->now);
726 st= pap_addr(pai, type, rdstart,rdstart+rdlen,
727 (adns_rr_addr *) pai->qu->vb.buf + naddrs);
732 ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_rr_addr));
733 if (!ha->addrs) R_NOMEM;
734 memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_rr_addr));
736 ha->astatus= adns_s_ok;
738 adns__isort(ha->addrs, naddrs, sizeof(adns_rr_addr), pai->qu->vb.buf,
744 static void icb_hostaddr(adns_query parent, adns_query child) {
745 adns_answer *cans= child->answer;
746 adns_rr_hostaddr *rrp= child->ctx.info.hostaddr;
747 adns_state ads= parent->ads;
752 rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs;
753 rrp->addrs= cans->rrs.addr;
754 adns__transfer_interim(child, parent, rrp->addrs,
755 rrp->naddrs*sizeof(adns_rr_addr));
757 if (parent->children.head) {
758 LIST_LINK_TAIL(ads->childw,parent);
760 adns__query_done(parent);
764 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
765 int max, adns_rr_hostaddr *rrp) {
770 adns_queryflags nflags;
772 dmstart= cbyte= *cbyte_io;
773 st= pap_domain(pai, &cbyte, max, &rrp->host,
774 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
778 rrp->astatus= adns_s_ok;
784 st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart);
786 if (rrp->naddrs != -1) return adns_s_ok;
788 st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart);
790 if (rrp->naddrs != -1) return adns_s_ok;
792 st= adns__mkquery_labels_frdgram(pai->ads, &pai->qu->vb,
793 pai->dgram, pai->dglen, dmstart);
797 ctx.callback= icb_hostaddr;
798 ctx.info.hostaddr= rrp;
800 nflags= adns_qf_quoteok_query;
801 if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
803 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
804 &pai->qu->vb, 0, nflags, pai->now, &ctx);
807 nqu->parent= pai->qu;
808 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
813 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte,
814 int max, void *datap) {
815 adns_rr_hostaddr *rrp= datap;
818 st= pap_hostaddr(pai, &cbyte, max, rrp);
820 if (cbyte != max) return adns_s_invaliddata;
825 static int dip_hostaddr(adns_state ads,
826 const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
827 if (ap->astatus != bp->astatus) return ap->astatus;
828 if (ap->astatus) return 0;
830 return dip_addr(ads, &ap->addrs[0], &bp->addrs[0]);
833 static int di_hostaddr(adns_state ads,
834 const void *datap_a, const void *datap_b) {
835 const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
837 return dip_hostaddr(ads, ap,bp);
840 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
843 adns__makefinal_str(qu,&rrp->host);
845 adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs));
849 static void mf_hostaddr(adns_query qu, void *datap) {
850 adns_rr_hostaddr *rrp= datap;
852 mfp_hostaddr(qu,rrp);
855 static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
861 st= csp_domain(vb,rrp->host); if (st) return st;
864 CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus));
866 sprintf(buf," %d ",rrp->astatus);
869 CSP_ADDSTR(adns_errabbrev(rrp->astatus));
872 errstr= adns_strerror(rrp->astatus);
873 st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st;
875 if (rrp->naddrs >= 0) {
877 for (i=0; i<rrp->naddrs; i++) {
879 st= csp_addr(vb,&rrp->addrs[i]);
888 static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
889 const adns_rr_hostaddr *rrp= datap;
891 return csp_hostaddr(vb,rrp);
898 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte,
899 int max, void *datap) {
900 const byte *dgram= pai->dgram;
901 adns_rr_intstr *rrp= datap;
905 if (cbyte+2 > max) return adns_s_invaliddata;
908 st= pap_domain(pai, &cbyte, max, &rrp->str,
909 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
912 if (cbyte != max) return adns_s_invaliddata;
916 static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
917 const adns_rr_intstr *ap= datap_a, *bp= datap_b;
919 if (ap->i < bp->i) return 0;
920 if (ap->i > bp->i) return 1;
928 static adns_status pa_mx(const parseinfo *pai, int cbyte,
929 int max, void *datap) {
930 const byte *dgram= pai->dgram;
931 adns_rr_inthostaddr *rrp= datap;
935 if (cbyte+2 > max) return adns_s_invaliddata;
938 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
941 if (cbyte != max) return adns_s_invaliddata;
945 static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
946 const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
948 if (ap->i < bp->i) return 0;
949 if (ap->i > bp->i) return 1;
950 return dip_hostaddr(ads, &ap->ha, &bp->ha);
954 * _inthostaddr (mf,cs)
957 static void mf_inthostaddr(adns_query qu, void *datap) {
958 adns_rr_inthostaddr *rrp= datap;
960 mfp_hostaddr(qu,&rrp->ha);
963 static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
964 const adns_rr_inthostaddr *rrp= datap;
967 sprintf(buf,"%u ",rrp->i);
970 return csp_hostaddr(vb,&rrp->ha);
977 static adns_status cs_inthost(vbuf *vb, const void *datap) {
978 const adns_rr_intstr *rrp= datap;
981 sprintf(buf,"%u ",rrp->i);
983 return csp_domain(vb,rrp->str);
987 * _ptr (pa, +icb_ptr)
990 static void icb_ptr(adns_query parent, adns_query child) {
991 adns_answer *cans= child->answer;
992 const adns_rr_addr *queried, *found;
993 adns_state ads= parent->ads;
996 if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
997 adns__query_fail(parent,adns_s_inconsistent);
999 } else if (cans->status) {
1000 adns__query_fail(parent,cans->status);
1004 queried= &parent->extra.info.ptr_addr;
1005 for (i=0, found=cans->rrs.addr; i<cans->nrrs; i++, found++) {
1006 if (queried->len == found->len &&
1007 !memcmp(&queried->addr,&found->addr,queried->len)) {
1008 if (!parent->children.head) {
1009 adns__query_done(parent);
1012 LIST_LINK_TAIL(ads->childw,parent);
1018 adns__query_fail(parent,adns_s_inconsistent);
1021 /* FIXME: Completely different in adns-1.4. */
1022 static adns_status pa_ptr(const parseinfo *pai, int dmstart,
1023 int max, void *datap) {
1024 static const char *const (expectdomain[])= { DNS_INADDR_ARPA };
1033 st= pap_domain(pai, &cbyte, max, rrp,
1034 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1036 if (cbyte != max) return adns_s_invaliddata;
1038 /* Should be initialized by adns_submit_reverse. If it's not, we
1039 * can't do any consistency checking. */
1040 if (!pai->qu->extra.info.ptr_addr.len) return adns_s_ok;
1042 pai->qu->vb.used = 0;
1043 st= adns__mkquery_labels_frdgram(pai->ads, &pai->qu->vb,
1044 pai->dgram, pai->dglen, dmstart);
1048 ctx.callback= icb_ptr;
1049 memset(&ctx.info,0,sizeof(ctx.info));
1050 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
1052 adns_qf_quoteok_query, pai->now, &ctx);
1055 nqu->parent= pai->qu;
1056 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
1064 static void mf_strpair(adns_query qu, void *datap) {
1065 adns_rr_strpair *rrp= datap;
1067 adns__makefinal_str(qu,&rrp->array[0]);
1068 adns__makefinal_str(qu,&rrp->array[1]);
1075 static void mf_intstrpair(adns_query qu, void *datap) {
1076 adns_rr_intstrpair *rrp= datap;
1078 adns__makefinal_str(qu,&rrp->array[0].str);
1079 adns__makefinal_str(qu,&rrp->array[1].str);
1086 static adns_status pa_hinfo(const parseinfo *pai, int cbyte,
1087 int max, void *datap) {
1088 adns_rr_intstrpair *rrp= datap;
1092 for (i=0; i<2; i++) {
1093 st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
1097 if (cbyte != max) return adns_s_invaliddata;
1106 static adns_status pap_mailbox822(const parseinfo *pai,
1107 int *cbyte_io, int max, char **mb_r) {
1108 int lablen, labstart, i, needquote, c, r, neednorm;
1109 const unsigned char *p;
1111 findlabel_state fls;
1117 adns__findlabel_start(&fls, pai->ads,
1119 pai->dgram, pai->dglen, max,
1120 *cbyte_io, cbyte_io);
1121 st= adns__findlabel_next(&fls,&lablen,&labstart);
1123 adns__vbuf_appendstr(vb,".");
1128 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
1130 if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
1131 if (c == '.' && !neednorm) neednorm= 1;
1132 else if (c==' ' || c>=127 || ctype_822special(c)) needquote++;
1136 if (needquote || neednorm) {
1137 r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
1138 adns__vbuf_appendq(vb,"\"",1);
1139 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
1141 if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1);
1142 adns__vbuf_appendq(vb,p,1);
1144 adns__vbuf_appendq(vb,"\"",1);
1146 r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
1149 r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
1151 st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
1155 str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
1156 memcpy(str,vb->buf,vb->used);
1162 static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
1164 if (pai->qu->typei->typekey & adns__qtf_mail822) {
1165 return pap_mailbox822(pai, cbyte_io, max, mb_r);
1167 return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok);
1171 static adns_status csp_mailbox(vbuf *vb, const char *mailbox) {
1172 return csp_domain(vb,mailbox);
1179 static adns_status pa_rp(const parseinfo *pai, int cbyte,
1180 int max, void *datap) {
1181 adns_rr_strpair *rrp= datap;
1184 st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
1187 st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
1190 if (cbyte != max) return adns_s_invaliddata;
1194 static adns_status cs_rp(vbuf *vb, const void *datap) {
1195 const adns_rr_strpair *rrp= datap;
1198 st= csp_mailbox(vb,rrp->array[0]); if (st) return st;
1200 st= csp_domain(vb,rrp->array[1]); if (st) return st;
1209 static adns_status pa_soa(const parseinfo *pai, int cbyte,
1210 int max, void *datap) {
1211 adns_rr_soa *rrp= datap;
1212 const byte *dgram= pai->dgram;
1216 st= pap_domain(pai, &cbyte, max, &rrp->mname,
1217 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1220 st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
1223 if (cbyte+20 != max) return adns_s_invaliddata;
1225 for (i=0; i<5; i++) {
1228 (&rrp->serial)[i]= (msw<<16) | lsw;
1234 static void mf_soa(adns_query qu, void *datap) {
1235 adns_rr_soa *rrp= datap;
1237 adns__makefinal_str(qu,&rrp->mname);
1238 adns__makefinal_str(qu,&rrp->rname);
1241 static adns_status cs_soa(vbuf *vb, const void *datap) {
1242 const adns_rr_soa *rrp= datap;
1247 st= csp_domain(vb,rrp->mname); if (st) return st;
1249 st= csp_mailbox(vb,rrp->rname); if (st) return st;
1251 for (i=0; i<5; i++) {
1252 sprintf(buf," %lu",(&rrp->serial)[i]);
1260 * _srv* (pa*2,di,cs*2,qdpl,postsort)
1263 static adns_status qdpl_srv(adns_state ads,
1264 const char **p_io, const char *pe, int labelnum,
1265 char label_r[DNS_MAXDOMAIN], int *ll_io,
1266 adns_queryflags flags,
1267 const typeinfo *typei) {
1272 if (labelnum < 2 && !(flags & adns_qf_quoteok_query)) {
1273 useflags= adns_qf_quoteok_query;
1279 st= adns__qdpl_normal(ads, p_io,pe, labelnum,label_r, ll_io, useflags,typei);
1284 if (!ll || label_r[0]!='_')
1285 return adns_s_querydomaininvalid;
1286 if (memchr(p_orig+1, '\\', pe - (p_orig+1)))
1287 return adns_s_querydomaininvalid;
1292 static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max,
1294 /* might be adns_rr_srvraw* */) {
1295 const byte *dgram= pai->dgram;
1299 if ((*cbyte_io += 6) > max) return adns_s_invaliddata;
1301 rrp->priority= GET_W(cbyte, ti);
1302 rrp->weight= GET_W(cbyte, ti);
1303 rrp->port= GET_W(cbyte, ti);
1307 static adns_status pa_srvraw(const parseinfo *pai, int cbyte,
1308 int max, void *datap) {
1309 adns_rr_srvraw *rrp= datap;
1312 st= pap_srv_begin(pai,&cbyte,max,datap);
1315 st= pap_domain(pai, &cbyte, max, &rrp->host,
1316 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1319 if (cbyte != max) return adns_s_invaliddata;
1323 static adns_status pa_srvha(const parseinfo *pai, int cbyte,
1324 int max, void *datap) {
1325 adns_rr_srvha *rrp= datap;
1328 st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st;
1329 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st;
1330 if (cbyte != max) return adns_s_invaliddata;
1334 static void mf_srvraw(adns_query qu, void *datap) {
1335 adns_rr_srvraw *rrp= datap;
1336 adns__makefinal_str(qu, &rrp->host);
1339 static void mf_srvha(adns_query qu, void *datap) {
1340 adns_rr_srvha *rrp= datap;
1341 mfp_hostaddr(qu,&rrp->ha);
1344 static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) {
1345 const adns_rr_srvraw *ap= datap_a, *bp= datap_b;
1346 /* might be const adns_rr_svhostaddr* */
1348 if (ap->priority < bp->priority) return 0;
1349 if (ap->priority > bp->priority) return 1;
1353 static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp
1354 /* might be adns_rr_srvraw* */) {
1356 sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port);
1361 static adns_status cs_srvraw(vbuf *vb, const void *datap) {
1362 const adns_rr_srvraw *rrp= datap;
1365 st= csp_srv_begin(vb,(const void*)rrp); if (st) return st;
1366 return csp_domain(vb,rrp->host);
1369 static adns_status cs_srvha(vbuf *vb, const void *datap) {
1370 const adns_rr_srvha *rrp= datap;
1373 st= csp_srv_begin(vb,(const void*)datap); if (st) return st;
1374 return csp_hostaddr(vb,&rrp->ha);
1377 static void postsort_srv(adns_state ads, void *array, int nrrs,
1378 const struct typeinfo *typei) {
1379 /* we treat everything in the array as if it were an adns_rr_srvha
1380 * even though the array might be of adns_rr_srvraw. That's OK
1381 * because they have the same prefix, which is all we access.
1382 * We use typei->rrsz, too, rather than naive array indexing, of course.
1384 char *workbegin, *workend, *search, *arrayend;
1385 const adns_rr_srvha *rr;
1386 union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp;
1387 int cpriority, totalweight, runtotal;
1390 for (workbegin= array, arrayend= workbegin + typei->rrsz * nrrs;
1391 workbegin < arrayend;
1392 workbegin= workend) {
1393 cpriority= (rr=(void*)workbegin)->priority;
1395 for (workend= workbegin, totalweight= 0;
1396 workend < arrayend && (rr=(void*)workend)->priority == cpriority;
1397 workend += typei->rrsz) {
1398 totalweight += rr->weight;
1401 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1402 * cpriority. From now on, workbegin points to the `remaining'
1403 * records: we select one record at a time (RFC2782 `Usage rules'
1404 * and `Format of the SRV RR' subsection `Weight') to place at
1405 * workbegin (swapping with the one that was there, and then
1406 * advance workbegin. */
1408 workbegin + typei->rrsz < workend; /* don't bother if just one */
1409 workbegin += typei->rrsz) {
1411 randval= nrand48(ads->rand48xsubi);
1412 randval %= (totalweight + 1);
1413 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1414 * totalweight must be <= 2^26 so probability nonuniformity is
1415 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1416 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1419 for (search=workbegin, runtotal=0;
1420 (runtotal += (rr=(void*)search)->weight) < randval;
1421 search += typei->rrsz);
1422 assert(search < arrayend);
1423 totalweight -= rr->weight;
1424 if (search != workbegin) {
1425 memcpy(&rrtmp, workbegin, typei->rrsz);
1426 memcpy(workbegin, search, typei->rrsz);
1427 memcpy(search, &rrtmp, typei->rrsz);
1432 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1433 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1434 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1442 static void mf_byteblock(adns_query qu, void *datap) {
1443 adns_rr_byteblock *rrp= datap;
1444 void *bytes= rrp->data;
1445 adns__makefinal_block(qu,&bytes,rrp->len);
1453 static adns_status pa_opaque(const parseinfo *pai, int cbyte,
1454 int max, void *datap) {
1455 adns_rr_byteblock *rrp= datap;
1457 rrp->len= max - cbyte;
1458 rrp->data= adns__alloc_interim(pai->qu, rrp->len);
1459 if (!rrp->data) R_NOMEM;
1460 memcpy(rrp->data, pai->dgram + cbyte, rrp->len);
1464 static adns_status cs_opaque(vbuf *vb, const void *datap) {
1465 const adns_rr_byteblock *rrp= datap;
1470 sprintf(buf,"\\# %d",rrp->len);
1473 for (l= rrp->len, p= rrp->data;
1476 sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]);
1482 sprintf(buf," %02x",*p);
1492 static void mf_flat(adns_query qu, void *data) { }
1498 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1500 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
1501 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
1503 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1504 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1505 printer,0,parser,comparer, adns__qdpl_normal,0 }
1506 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1507 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1508 printer,0,parser,comparer, adns__qdpl_normal,0 }
1509 #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer,qdpl,postsort) \
1510 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1511 printer,0,parser,comparer,qdpl,postsort }
1512 #define SPECIAL_TYPE(code,rrt,fmt,memb,submit,comparer,printer) \
1513 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1514 printer,submit,0,comparer, adns__qdpl_normal,0 }
1516 static const typeinfo typeinfos[] = {
1517 /* Must be in ascending order of rrtype ! */
1518 /* mem-mgmt code rrt fmt member parser comparer printer */
1520 FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr,cs_inaddr ),
1521 DEEP_TYPE(ns_raw, "NS", "raw",str, pa_host_raw,0, cs_domain ),
1522 DEEP_TYPE(cname, "CNAME", 0, str, pa_dom_raw, 0, cs_domain ),
1523 DEEP_TYPE(soa_raw,"SOA", "raw",soa, pa_soa, 0, cs_soa ),
1524 DEEP_TYPE(ptr_raw,"PTR", "raw",str, pa_host_raw,0, cs_domain ),
1525 DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,pa_hinfo, 0, cs_hinfo ),
1526 DEEP_TYPE(mx_raw, "MX", "raw",intstr, pa_mx_raw, di_mx_raw,cs_inthost ),
1527 DEEP_TYPE(txt, "TXT", 0, manyistr,pa_txt, 0, cs_txt ),
1528 DEEP_TYPE(rp_raw, "RP", "raw",strpair, pa_rp, 0, cs_rp ),
1529 FLAT_TYPE(aaaa, "AAAA", 0, in6addr, pa_in6addr, di_in6addr, cs_in6addr ),
1530 XTRA_TYPE(srv_raw,"SRV", "raw",srvraw , pa_srvraw, di_srv, cs_srvraw,
1531 qdpl_srv, postsort_srv),
1533 /* adns__qtf_deref set */
1534 DEEP_TYPE(ns, "NS", "+addr",hostaddr,pa_hostaddr,di_hostaddr,cs_hostaddr ),
1535 DEEP_TYPE(ptr, "PTR","checked",str, pa_ptr, 0, cs_domain ),
1536 DEEP_TYPE(mx, "MX", "+addr",inthostaddr,pa_mx, di_mx, cs_inthostaddr),
1537 XTRA_TYPE(srv, "SRV","+addr",srvha, pa_srvha, di_srv, cs_srvha,
1538 qdpl_srv, postsort_srv),
1540 DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0, cs_soa ),
1541 DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0, cs_rp ),
1543 /* adns__qtf_special set */
1544 SPECIAL_TYPE(addr,"<A+AAAA>", "addr",addr,sh_addr, di_addr, cs_addr ),
1547 static const typeinfo typeinfo_unknown=
1548 DEEP_TYPE(unknown,0, "unknown",byteblock,pa_opaque, 0, cs_opaque );
1550 const typeinfo *adns__findtype(adns_rrtype type) {
1551 const typeinfo *begin, *end, *mid;
1553 if (type & adns_r_unknown) return &typeinfo_unknown;
1555 begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
1557 while (begin < end) {
1558 mid= begin + ((end-begin)>>1);
1559 if (mid->typekey == type) return mid;
1560 if (type > mid->typekey) begin= mid+1;