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)
51 * +search_sortlist, dip_genaddr, csp_genaddr)
53 * _addr (pa,di,div,csp,cs,gsz
54 * +search_sortlist_sa, dip_sockaddr)
55 * _domain (pap,csp,cs)
58 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs
59 * +pap_findaddrs, icb_hostaddr)
62 * _inthostaddr (mf,cs)
64 * _ptr (ckl,pa +icb_ptr)
68 * _mailbox (pap,csp +pap_mailbox822)
71 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
76 * within each section:
95 static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max,
96 int *len_r, char **str_r) {
97 /* Neither len_r nor str_r may be null.
98 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
100 const byte *dgram= pai->dgram;
106 if (cbyte >= max) return adns_s_invaliddata;
108 if (cbyte+l > max) return adns_s_invaliddata;
110 str= adns__alloc_interim(pai->qu, l+1);
114 memcpy(str,dgram+cbyte,l);
123 static adns_status csp_qstring(vbuf *vb, const char *dp, int len) {
129 for (cn=0; cn<len; cn++) {
133 } else if (ch == '"') {
135 } else if (ch >= 32 && ch <= 126) {
136 if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
138 sprintf(buf,"\\x%02x",ch);
151 static void mf_str(adns_query qu, void *datap) {
154 adns__makefinal_str(qu,rrp);
161 static void mf_intstr(adns_query qu, void *datap) {
162 adns_rr_intstr *rrp= datap;
164 adns__makefinal_str(qu,&rrp->str);
171 static void mf_manyistr(adns_query qu, void *datap) {
172 adns_rr_intstr **rrp= datap;
173 adns_rr_intstr *te, *table;
177 for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
179 adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
181 for (te= *rrp; te->i >= 0; te++)
182 adns__makefinal_str(qu,&te->str);
189 static adns_status pa_txt(const parseinfo *pai, int cbyte,
190 int max, void *datap) {
191 adns_rr_intstr **rrp= datap, *table, *te;
192 const byte *dgram= pai->dgram;
193 int ti, tc, l, startbyte;
197 if (cbyte >= max) return adns_s_invaliddata;
199 while (cbyte < max) {
204 if (cbyte != max || !tc) return adns_s_invaliddata;
206 table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
209 for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
210 st= pap_qstring(pai, &cbyte, max, &te->i, &te->str);
213 assert(cbyte == max);
222 static adns_status cs_txt(vbuf *vb, const void *datap) {
223 const adns_rr_intstr *const *rrp= datap;
224 const adns_rr_intstr *current;
228 for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) {
229 if (spc) CSP_ADDSTR(" ");
230 st= csp_qstring(vb,current->str,current->i); if (st) return st;
239 static adns_status cs_hinfo(vbuf *vb, const void *datap) {
240 const adns_rr_intstrpair *rrp= datap;
243 st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st;
245 st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st;
250 * _inaddr (pa,di,cs +search_sortlist, dip_genaddr, csp_genaddr)
253 static adns_status pa_inaddr(const parseinfo *pai, int cbyte,
254 int max, void *datap) {
255 struct in_addr *storeto= datap;
257 if (max-cbyte != 4) return adns_s_invaliddata;
258 memcpy(storeto, pai->dgram + cbyte, 4);
262 static int search_sortlist(adns_state ads, int af, const void *ad) {
263 const struct sortlist *slp;
264 const struct in6_addr *a6;
269 if (af == AF_INET6) {
271 if (IN6_IS_ADDR_V4MAPPED(a6)) {
272 a.v4.s_addr= htonl(((unsigned long)a6->s6_addr[12] << 24) |
273 ((unsigned long)a6->s6_addr[13] << 16) |
274 ((unsigned long)a6->s6_addr[14] << 8) |
275 ((unsigned long)a6->s6_addr[15] << 0));
280 for (i=0, slp=ads->sortlist;
282 !adns__addr_match_p(af,ad, slp->af,&slp->base,&slp->mask) &&
284 adns__addr_match_p(AF_INET,&a, slp->af,&slp->base,&slp->mask));
289 static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) {
292 if (!ads->nsortlist) return 0;
294 ai= search_sortlist(ads,af,a);
295 bi= search_sortlist(ads,af,b);
299 static int di_inaddr(adns_state ads,
300 const void *datap_a, const void *datap_b) {
301 return dip_genaddr(ads,AF_INET,datap_a,datap_b);
304 static adns_status csp_genaddr(vbuf *vb, int af, const void *p) {
305 char buf[ADNS_ADDR2TEXT_BUFLEN];
306 int len= sizeof(buf);
310 memset(&a, 0, sizeof(a));
311 a.addr.sa.sa_family= af;
312 adns__sockaddr_inject(p, 0, &a.addr.sa);
313 err= adns_addr2text(&a.addr.sa,0, buf,&len, 0); assert(!err);
318 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
319 return csp_genaddr(vb, AF_INET,datap);
323 * _in6addr (pa,di,cs)
326 static adns_status pa_in6addr(const parseinfo *pai, int cbyte,
327 int max, void *datap) {
328 struct in6_addr *storeto= datap;
330 if (max-cbyte != 16) return adns_s_invaliddata;
331 memcpy(storeto->s6_addr, pai->dgram + cbyte, 16);
335 static int di_in6addr(adns_state ads,
336 const void *datap_a, const void *datap_b) {
337 return dip_genaddr(ads,AF_INET6,datap_a,datap_b);
340 static adns_status cs_in6addr(vbuf *vb, const void *datap) {
341 return csp_genaddr(vb,AF_INET6,datap);
345 * _addr (pa,di,div,csp,cs,gsz +search_sortlist_sa, dip_sockaddr)
348 static adns_status pa_addr(const parseinfo *pai, int cbyte,
349 int max, void *datap) {
350 adns_rr_addr *storeto= datap;
351 const byte *dgram= pai->dgram;
353 if (max-cbyte != 4) return adns_s_invaliddata;
354 storeto->len= sizeof(storeto->addr.inet);
355 memset(&storeto->addr,0,sizeof(storeto->addr.inet));
356 storeto->addr.inet.sin_family= AF_INET;
357 memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
361 static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) {
363 adns__sockaddr_extract(sa, &a, 0);
364 return search_sortlist(ads, sa->sa_family, &a);
367 static int dip_sockaddr(adns_state ads,
368 const struct sockaddr *sa,
369 const struct sockaddr *sb) {
370 if (!ads->sortlist) return 0;
371 return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb);
374 static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
375 const adns_rr_addr *ap= datap_a, *bp= datap_b;
376 return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa);
379 static int div_addr(void *context, const void *datap_a, const void *datap_b) {
380 const adns_state ads= context;
382 return di_addr(ads, datap_a, datap_b);
385 static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
386 char buf[ADNS_ADDR2TEXT_BUFLEN];
387 int len= sizeof(buf);
390 switch (rrp->addr.inet.sin_family) {
395 CSP_ADDSTR("INET6 ");
398 err= adns_addr2text(&rrp->addr.sa,0, buf,&len, 0); assert(!err);
402 sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
409 static adns_status cs_addr(vbuf *vb, const void *datap) {
410 const adns_rr_addr *rrp= datap;
412 return csp_addr(vb,rrp);
415 static int gsz_addr(const typeinfo *typei, adns_rrtype type) {
416 return type & adns__qtf_bigaddr ?
417 sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only);
421 * _domain (pap,csp,cs)
425 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
426 char **domain_r, parsedomain_flags flags) {
430 st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
431 pai->dgram,pai->dglen, cbyte_io, max);
433 if (!pai->qu->vb.used) return adns_s_invaliddata;
435 dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
438 dm[pai->qu->vb.used]= 0;
439 memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
445 static adns_status csp_domain(vbuf *vb, const char *domain) {
447 if (!*domain) CSP_ADDSTR(".");
451 static adns_status cs_domain(vbuf *vb, const void *datap) {
452 const char *const *domainp= datap;
453 return csp_domain(vb,*domainp);
456 static adns_status pa_dom_raw(const parseinfo *pai, int cbyte,
457 int max, void *datap) {
461 st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
464 if (cbyte != max) return adns_s_invaliddata;
472 static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
473 int max, void *datap) {
477 st= pap_domain(pai, &cbyte, max, rrp,
478 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
481 if (cbyte != max) return adns_s_invaliddata;
486 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
489 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
491 int *cbyte_io, int count, int dmstart) {
493 int type, class, rdlen, rdstart, ownermatched;
497 for (rri=0, naddrs=-1; rri<count; rri++) {
498 st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram,
499 pai->dglen, cbyte_io,
500 &type, &class, &ttl, &rdlen, &rdstart,
501 pai->dgram, pai->dglen, dmstart, &ownermatched);
503 if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) {
504 if (naddrs>0) break; else continue;
509 if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz))
511 adns__update_expires(pai->qu,ttl,pai->now);
512 st= pa_addr(pai, rdstart,rdstart+rdlen, pai->qu->vb.buf + naddrs*addrsz);
517 ha->addrs= adns__alloc_interim(pai->qu, naddrs*addrsz);
518 if (!ha->addrs) R_NOMEM;
519 memcpy(ha->addrs, pai->qu->vb.buf, naddrs*addrsz);
521 ha->astatus= adns_s_ok;
523 adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf,
529 static void icb_hostaddr(adns_query parent, adns_query child) {
530 adns_answer *cans= child->answer;
531 adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr;
532 adns_state ads= parent->ads;
537 rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs;
538 rrp->addrs= cans->rrs.addr;
539 adns__transfer_interim(child, parent, rrp->addrs);
541 if (parent->children.head) {
542 LIST_LINK_TAIL(ads->childw,parent);
544 adns__query_done(parent);
548 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
549 int max, adns_rr_hostaddr *rrp) {
555 adns_queryflags nflags;
556 size_t addrsz= gsz_addr(0, pai->qu->answer->type);
558 dmstart= cbyte= *cbyte_io;
559 st= pap_domain(pai, &cbyte, max, &rrp->host,
560 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
564 rrp->astatus= adns_s_ok;
570 st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->nscount, dmstart);
572 if (rrp->naddrs != -1) return adns_s_ok;
574 st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->arcount, dmstart);
576 if (rrp->naddrs != -1) return adns_s_ok;
578 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
579 pai->dgram, pai->dglen, dmstart,
580 adns_r_addr, adns_qf_quoteok_query);
584 ctx.callback= icb_hostaddr;
585 ctx.pinfo.hostaddr= rrp;
586 memset(&ctx.tinfo, 0, sizeof(ctx.tinfo));
588 nflags= adns_qf_quoteok_query;
589 if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
591 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
592 ((adns_r_addr & adns_rrt_reprmask) |
593 (pai->qu->answer->type & ~adns_rrt_reprmask)),
594 &pai->qu->vb, id, nflags, pai->now, &ctx);
597 nqu->parent= pai->qu;
598 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
603 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte,
604 int max, void *datap) {
605 adns_rr_hostaddr *rrp= datap;
608 st= pap_hostaddr(pai, &cbyte, max, rrp);
610 if (cbyte != max) return adns_s_invaliddata;
615 static int dip_hostaddr(adns_state ads,
616 const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
617 if (ap->astatus != bp->astatus) return ap->astatus;
618 if (ap->astatus) return 0;
620 return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa);
623 static int di_hostaddr(adns_state ads,
624 const void *datap_a, const void *datap_b) {
625 const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
627 return dip_hostaddr(ads, ap,bp);
630 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
632 size_t addrsz= gsz_addr(0, qu->answer->type);
634 adns__makefinal_str(qu,&rrp->host);
636 adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz);
640 static void mf_hostaddr(adns_query qu, void *datap) {
641 adns_rr_hostaddr *rrp= datap;
643 mfp_hostaddr(qu,rrp);
646 static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
652 st= csp_domain(vb,rrp->host); if (st) return st;
655 CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus));
657 sprintf(buf," %d ",rrp->astatus);
660 CSP_ADDSTR(adns_errabbrev(rrp->astatus));
663 errstr= adns_strerror(rrp->astatus);
664 st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st;
666 if (rrp->naddrs >= 0) {
668 for (i=0; i<rrp->naddrs; i++) {
670 st= csp_addr(vb,&rrp->addrs[i]);
679 static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
680 const adns_rr_hostaddr *rrp= datap;
682 return csp_hostaddr(vb,rrp);
689 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte,
690 int max, void *datap) {
691 const byte *dgram= pai->dgram;
692 adns_rr_intstr *rrp= datap;
696 if (cbyte+2 > max) return adns_s_invaliddata;
699 st= pap_domain(pai, &cbyte, max, &rrp->str,
700 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
703 if (cbyte != max) return adns_s_invaliddata;
707 static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
708 const adns_rr_intstr *ap= datap_a, *bp= datap_b;
710 if (ap->i < bp->i) return 0;
711 if (ap->i > bp->i) return 1;
719 static adns_status pa_mx(const parseinfo *pai, int cbyte,
720 int max, void *datap) {
721 const byte *dgram= pai->dgram;
722 adns_rr_inthostaddr *rrp= datap;
726 if (cbyte+2 > max) return adns_s_invaliddata;
729 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
732 if (cbyte != max) return adns_s_invaliddata;
736 static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
737 const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
739 if (ap->i < bp->i) return 0;
740 if (ap->i > bp->i) return 1;
741 return dip_hostaddr(ads, &ap->ha, &bp->ha);
745 * _inthostaddr (mf,cs)
748 static void mf_inthostaddr(adns_query qu, void *datap) {
749 adns_rr_inthostaddr *rrp= datap;
751 mfp_hostaddr(qu,&rrp->ha);
754 static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
755 const adns_rr_inthostaddr *rrp= datap;
758 sprintf(buf,"%u ",rrp->i);
761 return csp_hostaddr(vb,&rrp->ha);
768 static adns_status cs_inthost(vbuf *vb, const void *datap) {
769 const adns_rr_intstr *rrp= datap;
772 sprintf(buf,"%u ",rrp->i);
774 return csp_domain(vb,rrp->str);
778 * _ptr (ckl,pa +icb_ptr)
781 static adns_status ckl_ptr(adns_state ads, adns_queryflags flags,
782 union checklabel_state *cls, qcontext *ctx,
783 int labnum, const char *label, int lablen) {
785 if (adns__revparse_label(&cls->ptr, labnum, label,lablen))
786 return adns_s_querydomainwrong;
788 if (adns__revparse_done(&cls->ptr, labnum,
789 &ctx->tinfo.ptr.rev_rrtype,
790 &ctx->tinfo.ptr.addr))
791 return adns_s_querydomainwrong;
796 static void icb_ptr(adns_query parent, adns_query child) {
797 adns_answer *cans= child->answer;
798 const struct af_addr *queried;
799 const unsigned char *found;
800 adns_state ads= parent->ads;
803 if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
804 adns__query_fail(parent,adns_s_inconsistent);
806 } else if (cans->status) {
807 adns__query_fail(parent,cans->status);
811 queried= &parent->ctx.tinfo.ptr.addr;
812 for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) {
813 if (adns__genaddr_equal_p(queried->af,&queried->addr,
814 parent->ctx.tinfo.ptr.addr.af,found)) {
815 if (!parent->children.head) {
816 adns__query_done(parent);
819 LIST_LINK_TAIL(ads->childw,parent);
825 adns__query_fail(parent,adns_s_inconsistent);
828 static adns_status pa_ptr(const parseinfo *pai, int dmstart,
829 int max, void *datap) {
832 adns_rrtype rrtype= pai->qu->ctx.tinfo.ptr.rev_rrtype;
838 st= pap_domain(pai, &cbyte, max, rrp,
839 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
841 if (cbyte != max) return adns_s_invaliddata;
843 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
844 pai->dgram, pai->dglen, dmstart,
845 rrtype, adns_qf_quoteok_query);
849 ctx.callback= icb_ptr;
850 memset(&ctx.pinfo,0,sizeof(ctx.pinfo));
851 memset(&ctx.tinfo,0,sizeof(ctx.tinfo));
852 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(rrtype),
853 rrtype, &pai->qu->vb, id,
854 adns_qf_quoteok_query, pai->now, &ctx);
857 nqu->parent= pai->qu;
858 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
866 static void mf_strpair(adns_query qu, void *datap) {
867 adns_rr_strpair *rrp= datap;
869 adns__makefinal_str(qu,&rrp->array[0]);
870 adns__makefinal_str(qu,&rrp->array[1]);
877 static void mf_intstrpair(adns_query qu, void *datap) {
878 adns_rr_intstrpair *rrp= datap;
880 adns__makefinal_str(qu,&rrp->array[0].str);
881 adns__makefinal_str(qu,&rrp->array[1].str);
888 static adns_status pa_hinfo(const parseinfo *pai, int cbyte,
889 int max, void *datap) {
890 adns_rr_intstrpair *rrp= datap;
894 for (i=0; i<2; i++) {
895 st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
899 if (cbyte != max) return adns_s_invaliddata;
905 * _mailbox (pap,cs +pap_mailbox822)
908 static adns_status pap_mailbox822(const parseinfo *pai,
909 int *cbyte_io, int max, char **mb_r) {
910 int lablen, labstart, i, needquote, c, r, neednorm;
911 const unsigned char *p;
919 adns__findlabel_start(&fls, pai->ads,
921 pai->dgram, pai->dglen, max,
922 *cbyte_io, cbyte_io);
923 st= adns__findlabel_next(&fls,&lablen,&labstart);
925 adns__vbuf_appendstr(vb,".");
930 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
932 if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
933 if (c == '.' && !neednorm) neednorm= 1;
934 else if (c==' ' || c>=127 || ctype_822special(c)) needquote++;
938 if (needquote || neednorm) {
939 r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
940 adns__vbuf_appendq(vb,"\"",1);
941 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
943 if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1);
944 adns__vbuf_appendq(vb,p,1);
946 adns__vbuf_appendq(vb,"\"",1);
948 r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
951 r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
953 st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
957 str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
958 memcpy(str,vb->buf,vb->used);
964 static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
966 if (pai->qu->typei->typekey & adns__qtf_mail822) {
967 return pap_mailbox822(pai, cbyte_io, max, mb_r);
969 return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok);
973 static adns_status csp_mailbox(vbuf *vb, const char *mailbox) {
974 return csp_domain(vb,mailbox);
981 static adns_status pa_rp(const parseinfo *pai, int cbyte,
982 int max, void *datap) {
983 adns_rr_strpair *rrp= datap;
986 st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
989 st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
992 if (cbyte != max) return adns_s_invaliddata;
996 static adns_status cs_rp(vbuf *vb, const void *datap) {
997 const adns_rr_strpair *rrp= datap;
1000 st= csp_mailbox(vb,rrp->array[0]); if (st) return st;
1002 st= csp_domain(vb,rrp->array[1]); if (st) return st;
1011 static adns_status pa_soa(const parseinfo *pai, int cbyte,
1012 int max, void *datap) {
1013 adns_rr_soa *rrp= datap;
1014 const byte *dgram= pai->dgram;
1018 st= pap_domain(pai, &cbyte, max, &rrp->mname,
1019 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1022 st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
1025 if (cbyte+20 != max) return adns_s_invaliddata;
1027 for (i=0; i<5; i++) {
1030 (&rrp->serial)[i]= (msw<<16) | lsw;
1036 static void mf_soa(adns_query qu, void *datap) {
1037 adns_rr_soa *rrp= datap;
1039 adns__makefinal_str(qu,&rrp->mname);
1040 adns__makefinal_str(qu,&rrp->rname);
1043 static adns_status cs_soa(vbuf *vb, const void *datap) {
1044 const adns_rr_soa *rrp= datap;
1049 st= csp_domain(vb,rrp->mname); if (st) return st;
1051 st= csp_mailbox(vb,rrp->rname); if (st) return st;
1053 for (i=0; i<5; i++) {
1054 sprintf(buf," %lu",(&rrp->serial)[i]);
1062 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
1065 static adns_status ckl_srv(adns_state ads, adns_queryflags flags,
1066 union checklabel_state *cls, qcontext *ctx,
1067 int labnum, const char *label, int lablen) {
1068 if (labnum < 2 && !(flags & adns_qf_quoteok_query)) {
1069 if (!lablen || label[0] != '_') return adns_s_querydomaininvalid;
1072 return adns__ckl_hostname(ads, flags, cls, ctx, labnum, label, lablen);
1075 static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max,
1077 /* might be adns_rr_srvraw* */) {
1078 const byte *dgram= pai->dgram;
1082 if ((*cbyte_io += 6) > max) return adns_s_invaliddata;
1084 rrp->priority= GET_W(cbyte, ti);
1085 rrp->weight= GET_W(cbyte, ti);
1086 rrp->port= GET_W(cbyte, ti);
1090 static adns_status pa_srvraw(const parseinfo *pai, int cbyte,
1091 int max, void *datap) {
1092 adns_rr_srvraw *rrp= datap;
1095 st= pap_srv_begin(pai,&cbyte,max,datap);
1098 st= pap_domain(pai, &cbyte, max, &rrp->host,
1099 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1102 if (cbyte != max) return adns_s_invaliddata;
1106 static adns_status pa_srvha(const parseinfo *pai, int cbyte,
1107 int max, void *datap) {
1108 adns_rr_srvha *rrp= datap;
1111 st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st;
1112 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st;
1113 if (cbyte != max) return adns_s_invaliddata;
1117 static void mf_srvraw(adns_query qu, void *datap) {
1118 adns_rr_srvraw *rrp= datap;
1119 adns__makefinal_str(qu, &rrp->host);
1122 static void mf_srvha(adns_query qu, void *datap) {
1123 adns_rr_srvha *rrp= datap;
1124 mfp_hostaddr(qu,&rrp->ha);
1127 static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) {
1128 const adns_rr_srvraw *ap= datap_a, *bp= datap_b;
1129 /* might be const adns_rr_svhostaddr* */
1131 if (ap->priority < bp->priority) return 0;
1132 if (ap->priority > bp->priority) return 1;
1136 static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp
1137 /* might be adns_rr_srvraw* */) {
1139 sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port);
1144 static adns_status cs_srvraw(vbuf *vb, const void *datap) {
1145 const adns_rr_srvraw *rrp= datap;
1148 st= csp_srv_begin(vb,(const void*)rrp); if (st) return st;
1149 return csp_domain(vb,rrp->host);
1152 static adns_status cs_srvha(vbuf *vb, const void *datap) {
1153 const adns_rr_srvha *rrp= datap;
1156 st= csp_srv_begin(vb,(const void*)datap); if (st) return st;
1157 return csp_hostaddr(vb,&rrp->ha);
1160 static void postsort_srv(adns_state ads, void *array, int nrrs,int rrsz,
1161 const struct typeinfo *typei) {
1162 /* we treat everything in the array as if it were an adns_rr_srvha
1163 * even though the array might be of adns_rr_srvraw. That's OK
1164 * because they have the same prefix, which is all we access.
1165 * We use rrsz, too, rather than naive array indexing, of course.
1167 char *workbegin, *workend, *search, *arrayend;
1168 const adns_rr_srvha *rr;
1169 union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp;
1170 int cpriority, totalweight, runtotal;
1173 assert(rrsz <= sizeof(rrtmp));
1174 for (workbegin= array, arrayend= workbegin + rrsz * nrrs;
1175 workbegin < arrayend;
1176 workbegin= workend) {
1177 cpriority= (rr=(void*)workbegin)->priority;
1179 for (workend= workbegin, totalweight= 0;
1180 workend < arrayend && (rr=(void*)workend)->priority == cpriority;
1182 totalweight += rr->weight;
1185 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1186 * cpriority. From now on, workbegin points to the `remaining'
1187 * records: we select one record at a time (RFC2782 `Usage rules'
1188 * and `Format of the SRV RR' subsection `Weight') to place at
1189 * workbegin (swapping with the one that was there, and then
1190 * advance workbegin. */
1192 workbegin + rrsz < workend; /* don't bother if just one */
1193 workbegin += rrsz) {
1195 randval= nrand48(ads->rand48xsubi);
1196 randval %= (totalweight + 1);
1197 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1198 * totalweight must be <= 2^26 so probability nonuniformity is
1199 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1200 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1203 for (search=workbegin, runtotal=0;
1204 (runtotal += (rr=(void*)search)->weight) < randval;
1206 assert(search < arrayend);
1207 totalweight -= rr->weight;
1208 if (search != workbegin) {
1209 memcpy(&rrtmp, workbegin, rrsz);
1210 memcpy(workbegin, search, rrsz);
1211 memcpy(search, &rrtmp, rrsz);
1216 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1217 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1218 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1226 static void mf_byteblock(adns_query qu, void *datap) {
1227 adns_rr_byteblock *rrp= datap;
1228 void *bytes= rrp->data;
1229 adns__makefinal_block(qu,&bytes,rrp->len);
1237 static adns_status pa_opaque(const parseinfo *pai, int cbyte,
1238 int max, void *datap) {
1239 adns_rr_byteblock *rrp= datap;
1241 rrp->len= max - cbyte;
1242 rrp->data= adns__alloc_interim(pai->qu, rrp->len);
1243 if (!rrp->data) R_NOMEM;
1244 memcpy(rrp->data, pai->dgram + cbyte, rrp->len);
1248 static adns_status cs_opaque(vbuf *vb, const void *datap) {
1249 const adns_rr_byteblock *rrp= datap;
1254 sprintf(buf,"\\# %d",rrp->len);
1257 for (l= rrp->len, p= rrp->data;
1260 sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]);
1266 sprintf(buf," %02x",*p);
1276 static void mf_flat(adns_query qu, void *data) { }
1282 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1284 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1285 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1286 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1287 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1289 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1290 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1291 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1292 adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
1297 static const typeinfo typeinfos[] = {
1298 /* Must be in ascending order of rrtype ! */
1299 /* mem-mgmt code rrt fmt member parser comparer printer */
1301 FLAT_TYPE(a, "A", 0, inaddr, inaddr, inaddr,inaddr ),
1302 DEEP_TYPE(ns_raw, "NS", "raw",str, host_raw,0, domain ),
1303 DEEP_TYPE(cname, "CNAME", 0, str, dom_raw, 0, domain ),
1304 DEEP_TYPE(soa_raw,"SOA", "raw",soa, soa, 0, soa ),
1305 DEEP_TYPE(ptr_raw,"PTR", "raw",str, host_raw,0, domain ),
1306 DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,hinfo, 0, hinfo ),
1307 DEEP_TYPE(mx_raw, "MX", "raw",intstr, mx_raw, mx_raw,inthost ),
1308 DEEP_TYPE(txt, "TXT", 0, manyistr, txt, 0, txt ),
1309 DEEP_TYPE(rp_raw, "RP", "raw",strpair, rp, 0, rp ),
1310 FLAT_TYPE(aaaa, "AAAA", 0, in6addr, in6addr, in6addr,in6addr ),
1311 DEEP_TYPE(srv_raw,"SRV", "raw",srvraw , srvraw, srv, srvraw,
1312 .checklabel= ckl_srv, .postsort= postsort_srv),
1314 FLAT_TYPE(addr, "A", "addr", addr, addr, addr, addr,
1315 .getrrsz= gsz_addr),
1316 DEEP_TYPE(ns, "NS", "+addr",hostaddr, hostaddr,hostaddr,hostaddr ),
1317 DEEP_TYPE(ptr, "PTR","checked",str, ptr, 0, domain,
1318 .checklabel= ckl_ptr),
1319 DEEP_TYPE(mx, "MX", "+addr",inthostaddr,mx, mx, inthostaddr, ),
1320 DEEP_TYPE(srv, "SRV","+addr",srvha, srvha, srv, srvha,
1321 .checklabel= ckl_srv, .postsort= postsort_srv),
1323 DEEP_TYPE(soa, "SOA","822", soa, soa, 0, soa ),
1324 DEEP_TYPE(rp, "RP", "822", strpair, rp, 0, rp ),
1327 static const typeinfo typeinfo_unknown=
1328 DEEP_TYPE(unknown,0, "unknown",byteblock,opaque, 0, opaque );
1330 const typeinfo *adns__findtype(adns_rrtype type) {
1331 const typeinfo *begin, *end, *mid;
1333 if (type & adns_r_unknown) return &typeinfo_unknown;
1334 type &= adns_rrt_reprmask;
1336 begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
1338 while (begin < end) {
1339 mid= begin + ((end-begin)>>1);
1340 if (mid->typekey == type) return mid;
1341 if (type > mid->typekey) begin= mid+1;