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:
94 static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max,
95 int *len_r, char **str_r) {
96 /* Neither len_r nor str_r may be null.
97 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
99 const byte *dgram= pai->dgram;
105 if (cbyte >= max) return adns_s_invaliddata;
107 if (cbyte+l > max) return adns_s_invaliddata;
109 str= adns__alloc_interim(pai->qu, l+1);
113 memcpy(str,dgram+cbyte,l);
122 static adns_status csp_qstring(vbuf *vb, const char *dp, int len) {
128 for (cn=0; cn<len; cn++) {
132 } else if (ch == '"') {
134 } else if (ch >= 32 && ch <= 126) {
135 if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
137 sprintf(buf,"\\x%02x",ch);
150 static void mf_str(adns_query qu, void *datap) {
153 adns__makefinal_str(qu,rrp);
160 static void mf_intstr(adns_query qu, void *datap) {
161 adns_rr_intstr *rrp= datap;
163 adns__makefinal_str(qu,&rrp->str);
170 static void mf_manyistr(adns_query qu, void *datap) {
171 adns_rr_intstr **rrp= datap;
172 adns_rr_intstr *te, *table;
176 for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
178 adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
180 for (te= *rrp; te->i >= 0; te++)
181 adns__makefinal_str(qu,&te->str);
188 static adns_status pa_txt(const parseinfo *pai, int cbyte,
189 int max, void *datap) {
190 adns_rr_intstr **rrp= datap, *table, *te;
191 const byte *dgram= pai->dgram;
192 int ti, tc, l, startbyte;
196 if (cbyte >= max) return adns_s_invaliddata;
198 while (cbyte < max) {
203 if (cbyte != max || !tc) return adns_s_invaliddata;
205 table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
208 for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
209 st= pap_qstring(pai, &cbyte, max, &te->i, &te->str);
212 assert(cbyte == max);
221 static adns_status cs_txt(vbuf *vb, const void *datap) {
222 const adns_rr_intstr *const *rrp= datap;
223 const adns_rr_intstr *current;
227 for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) {
228 if (spc) CSP_ADDSTR(" ");
229 st= csp_qstring(vb,current->str,current->i); if (st) return st;
238 static adns_status cs_hinfo(vbuf *vb, const void *datap) {
239 const adns_rr_intstrpair *rrp= datap;
242 st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st;
244 st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st;
249 * _inaddr (pa,di,cs +search_sortlist, dip_genaddr, csp_genaddr)
252 static adns_status pa_inaddr(const parseinfo *pai, int cbyte,
253 int max, void *datap) {
254 struct in_addr *storeto= datap;
256 if (max-cbyte != 4) return adns_s_invaliddata;
257 memcpy(storeto, pai->dgram + cbyte, 4);
261 static int search_sortlist(adns_state ads, int af, const void *ad) {
262 const struct sortlist *slp;
265 for (i=0, slp=ads->sortlist;
267 !adns__addr_match_p(af,ad, slp->af,&slp->base,&slp->mask);
272 static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) {
275 if (!ads->nsortlist) return 0;
277 ai= search_sortlist(ads,af,a);
278 bi= search_sortlist(ads,af,b);
282 static int di_inaddr(adns_state ads,
283 const void *datap_a, const void *datap_b) {
284 return dip_genaddr(ads,AF_INET,datap_a,datap_b);
287 static adns_status csp_genaddr(vbuf *vb, int af, const void *p) {
288 char buf[ADNS_ADDR2TEXT_BUFLEN];
289 int len= sizeof(buf);
293 memset(&a, 0, sizeof(a));
294 a.addr.sa.sa_family= af;
295 adns__sockaddr_inject(p, 0, &a.addr.sa);
296 err= adns_addr2text(&a.addr.sa,0, buf,&len, 0); assert(!err);
301 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
302 return csp_genaddr(vb, AF_INET,datap);
306 * _in6addr (pa,di,cs)
309 static adns_status pa_in6addr(const parseinfo *pai, int cbyte,
310 int max, void *datap) {
311 struct in6_addr *storeto= datap;
313 if (max-cbyte != 16) return adns_s_invaliddata;
314 memcpy(storeto->s6_addr, pai->dgram + cbyte, 16);
318 static int di_in6addr(adns_state ads,
319 const void *datap_a, const void *datap_b) {
320 return dip_genaddr(ads,AF_INET6,datap_a,datap_b);
323 static adns_status cs_in6addr(vbuf *vb, const void *datap) {
324 return csp_genaddr(vb,AF_INET6,datap);
328 * _addr (pa,di,div,csp,cs,gsz +search_sortlist_sa, dip_sockaddr)
331 static adns_status pa_addr(const parseinfo *pai, int cbyte,
332 int max, void *datap) {
333 adns_rr_addr *storeto= datap;
334 const byte *dgram= pai->dgram;
336 if (max-cbyte != 4) return adns_s_invaliddata;
337 storeto->len= sizeof(storeto->addr.inet);
338 memset(&storeto->addr,0,sizeof(storeto->addr.inet));
339 storeto->addr.inet.sin_family= AF_INET;
340 memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
344 static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) {
346 adns__sockaddr_extract(sa, &a, 0);
347 return search_sortlist(ads, sa->sa_family, &a);
350 static int dip_sockaddr(adns_state ads,
351 const struct sockaddr *sa,
352 const struct sockaddr *sb) {
353 if (!ads->sortlist) return 0;
354 return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb);
357 static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
358 const adns_rr_addr *ap= datap_a, *bp= datap_b;
359 return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa);
362 static int div_addr(void *context, const void *datap_a, const void *datap_b) {
363 const adns_state ads= context;
365 return di_addr(ads, datap_a, datap_b);
368 static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
369 char buf[ADNS_ADDR2TEXT_BUFLEN];
370 int len= sizeof(buf);
373 switch (rrp->addr.inet.sin_family) {
378 CSP_ADDSTR("INET6 ");
381 err= adns_addr2text(&rrp->addr.sa,0, buf,&len, 0); assert(!err);
385 sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
392 static adns_status cs_addr(vbuf *vb, const void *datap) {
393 const adns_rr_addr *rrp= datap;
395 return csp_addr(vb,rrp);
398 static int gsz_addr(const typeinfo *typei, adns_rrtype type) {
399 return type & adns__qtf_bigaddr ?
400 sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only);
404 * _domain (pap,csp,cs)
408 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
409 char **domain_r, parsedomain_flags flags) {
413 st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
414 pai->dgram,pai->dglen, cbyte_io, max);
416 if (!pai->qu->vb.used) return adns_s_invaliddata;
418 dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
421 dm[pai->qu->vb.used]= 0;
422 memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
428 static adns_status csp_domain(vbuf *vb, const char *domain) {
430 if (!*domain) CSP_ADDSTR(".");
434 static adns_status cs_domain(vbuf *vb, const void *datap) {
435 const char *const *domainp= datap;
436 return csp_domain(vb,*domainp);
439 static adns_status pa_dom_raw(const parseinfo *pai, int cbyte,
440 int max, void *datap) {
444 st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
447 if (cbyte != max) return adns_s_invaliddata;
455 static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
456 int max, void *datap) {
460 st= pap_domain(pai, &cbyte, max, rrp,
461 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
464 if (cbyte != max) return adns_s_invaliddata;
469 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
472 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
474 int *cbyte_io, int count, int dmstart) {
476 int type, class, rdlen, rdstart, ownermatched;
480 for (rri=0, naddrs=-1; rri<count; rri++) {
481 st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram,
482 pai->dglen, cbyte_io,
483 &type, &class, &ttl, &rdlen, &rdstart,
484 pai->dgram, pai->dglen, dmstart, &ownermatched);
486 if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) {
487 if (naddrs>0) break; else continue;
492 if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz))
494 adns__update_expires(pai->qu,ttl,pai->now);
495 st= pa_addr(pai, rdstart,rdstart+rdlen, pai->qu->vb.buf + naddrs*addrsz);
500 ha->addrs= adns__alloc_interim(pai->qu, naddrs*addrsz);
501 if (!ha->addrs) R_NOMEM;
502 memcpy(ha->addrs, pai->qu->vb.buf, naddrs*addrsz);
504 ha->astatus= adns_s_ok;
506 adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf,
512 static void icb_hostaddr(adns_query parent, adns_query child) {
513 adns_answer *cans= child->answer;
514 adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr;
515 adns_state ads= parent->ads;
520 rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs;
521 rrp->addrs= cans->rrs.addr;
522 adns__transfer_interim(child, parent, rrp->addrs);
524 if (parent->children.head) {
525 LIST_LINK_TAIL(ads->childw,parent);
527 adns__query_done(parent);
531 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
532 int max, adns_rr_hostaddr *rrp) {
538 adns_queryflags nflags;
539 size_t addrsz= gsz_addr(0, pai->qu->answer->type);
541 dmstart= cbyte= *cbyte_io;
542 st= pap_domain(pai, &cbyte, max, &rrp->host,
543 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
547 rrp->astatus= adns_s_ok;
553 st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->nscount, dmstart);
555 if (rrp->naddrs != -1) return adns_s_ok;
557 st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->arcount, dmstart);
559 if (rrp->naddrs != -1) return adns_s_ok;
561 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
562 pai->dgram, pai->dglen, dmstart,
563 adns_r_addr, adns_qf_quoteok_query);
567 ctx.callback= icb_hostaddr;
568 ctx.pinfo.hostaddr= rrp;
569 memset(&ctx.tinfo, 0, sizeof(ctx.tinfo));
571 nflags= adns_qf_quoteok_query;
572 if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
574 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
575 ((adns_r_addr & adns_rrt_reprmask) |
576 (pai->qu->answer->type & ~adns_rrt_reprmask)),
577 &pai->qu->vb, id, nflags, pai->now, &ctx);
580 nqu->parent= pai->qu;
581 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
586 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte,
587 int max, void *datap) {
588 adns_rr_hostaddr *rrp= datap;
591 st= pap_hostaddr(pai, &cbyte, max, rrp);
593 if (cbyte != max) return adns_s_invaliddata;
598 static int dip_hostaddr(adns_state ads,
599 const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
600 if (ap->astatus != bp->astatus) return ap->astatus;
601 if (ap->astatus) return 0;
603 return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa);
606 static int di_hostaddr(adns_state ads,
607 const void *datap_a, const void *datap_b) {
608 const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
610 return dip_hostaddr(ads, ap,bp);
613 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
615 size_t addrsz= gsz_addr(0, qu->answer->type);
617 adns__makefinal_str(qu,&rrp->host);
619 adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz);
623 static void mf_hostaddr(adns_query qu, void *datap) {
624 adns_rr_hostaddr *rrp= datap;
626 mfp_hostaddr(qu,rrp);
629 static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
635 st= csp_domain(vb,rrp->host); if (st) return st;
638 CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus));
640 sprintf(buf," %d ",rrp->astatus);
643 CSP_ADDSTR(adns_errabbrev(rrp->astatus));
646 errstr= adns_strerror(rrp->astatus);
647 st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st;
649 if (rrp->naddrs >= 0) {
651 for (i=0; i<rrp->naddrs; i++) {
653 st= csp_addr(vb,&rrp->addrs[i]);
662 static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
663 const adns_rr_hostaddr *rrp= datap;
665 return csp_hostaddr(vb,rrp);
672 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte,
673 int max, void *datap) {
674 const byte *dgram= pai->dgram;
675 adns_rr_intstr *rrp= datap;
679 if (cbyte+2 > max) return adns_s_invaliddata;
682 st= pap_domain(pai, &cbyte, max, &rrp->str,
683 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
686 if (cbyte != max) return adns_s_invaliddata;
690 static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
691 const adns_rr_intstr *ap= datap_a, *bp= datap_b;
693 if (ap->i < bp->i) return 0;
694 if (ap->i > bp->i) return 1;
702 static adns_status pa_mx(const parseinfo *pai, int cbyte,
703 int max, void *datap) {
704 const byte *dgram= pai->dgram;
705 adns_rr_inthostaddr *rrp= datap;
709 if (cbyte+2 > max) return adns_s_invaliddata;
712 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
715 if (cbyte != max) return adns_s_invaliddata;
719 static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
720 const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
722 if (ap->i < bp->i) return 0;
723 if (ap->i > bp->i) return 1;
724 return dip_hostaddr(ads, &ap->ha, &bp->ha);
728 * _inthostaddr (mf,cs)
731 static void mf_inthostaddr(adns_query qu, void *datap) {
732 adns_rr_inthostaddr *rrp= datap;
734 mfp_hostaddr(qu,&rrp->ha);
737 static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
738 const adns_rr_inthostaddr *rrp= datap;
741 sprintf(buf,"%u ",rrp->i);
744 return csp_hostaddr(vb,&rrp->ha);
751 static adns_status cs_inthost(vbuf *vb, const void *datap) {
752 const adns_rr_intstr *rrp= datap;
755 sprintf(buf,"%u ",rrp->i);
757 return csp_domain(vb,rrp->str);
761 * _ptr (ckl,pa +icb_ptr)
764 static adns_status ckl_ptr(adns_state ads, adns_queryflags flags,
765 union checklabel_state *cls, qcontext *ctx,
766 int labnum, const char *label, int lablen) {
768 if (adns__revparse_label(&cls->ptr, labnum, label,lablen))
769 return adns_s_querydomainwrong;
771 if (adns__revparse_done(&cls->ptr, labnum,
772 &ctx->tinfo.ptr.rev_rrtype,
773 &ctx->tinfo.ptr.addr))
774 return adns_s_querydomainwrong;
779 static void icb_ptr(adns_query parent, adns_query child) {
780 adns_answer *cans= child->answer;
781 const struct af_addr *queried;
782 const unsigned char *found;
783 adns_state ads= parent->ads;
786 if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
787 adns__query_fail(parent,adns_s_inconsistent);
789 } else if (cans->status) {
790 adns__query_fail(parent,cans->status);
794 queried= &parent->ctx.tinfo.ptr.addr;
795 for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) {
796 if (adns__genaddr_equal_p(queried->af,&queried->addr,
797 parent->ctx.tinfo.ptr.addr.af,found)) {
798 if (!parent->children.head) {
799 adns__query_done(parent);
802 LIST_LINK_TAIL(ads->childw,parent);
808 adns__query_fail(parent,adns_s_inconsistent);
811 static adns_status pa_ptr(const parseinfo *pai, int dmstart,
812 int max, void *datap) {
815 adns_rrtype rrtype= pai->qu->ctx.tinfo.ptr.rev_rrtype;
821 st= pap_domain(pai, &cbyte, max, rrp,
822 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
824 if (cbyte != max) return adns_s_invaliddata;
826 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
827 pai->dgram, pai->dglen, dmstart,
828 rrtype, adns_qf_quoteok_query);
832 ctx.callback= icb_ptr;
833 memset(&ctx.pinfo,0,sizeof(ctx.pinfo));
834 memset(&ctx.tinfo,0,sizeof(ctx.tinfo));
835 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(rrtype),
836 rrtype, &pai->qu->vb, id,
837 adns_qf_quoteok_query, pai->now, &ctx);
840 nqu->parent= pai->qu;
841 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
849 static void mf_strpair(adns_query qu, void *datap) {
850 adns_rr_strpair *rrp= datap;
852 adns__makefinal_str(qu,&rrp->array[0]);
853 adns__makefinal_str(qu,&rrp->array[1]);
860 static void mf_intstrpair(adns_query qu, void *datap) {
861 adns_rr_intstrpair *rrp= datap;
863 adns__makefinal_str(qu,&rrp->array[0].str);
864 adns__makefinal_str(qu,&rrp->array[1].str);
871 static adns_status pa_hinfo(const parseinfo *pai, int cbyte,
872 int max, void *datap) {
873 adns_rr_intstrpair *rrp= datap;
877 for (i=0; i<2; i++) {
878 st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
882 if (cbyte != max) return adns_s_invaliddata;
888 * _mailbox (pap,cs +pap_mailbox822)
891 static adns_status pap_mailbox822(const parseinfo *pai,
892 int *cbyte_io, int max, char **mb_r) {
893 int lablen, labstart, i, needquote, c, r, neednorm;
894 const unsigned char *p;
902 adns__findlabel_start(&fls, pai->ads,
904 pai->dgram, pai->dglen, max,
905 *cbyte_io, cbyte_io);
906 st= adns__findlabel_next(&fls,&lablen,&labstart);
908 adns__vbuf_appendstr(vb,".");
913 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
915 if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
916 if (c == '.' && !neednorm) neednorm= 1;
917 else if (c==' ' || c>=127 || ctype_822special(c)) needquote++;
921 if (needquote || neednorm) {
922 r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
923 adns__vbuf_appendq(vb,"\"",1);
924 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
926 if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1);
927 adns__vbuf_appendq(vb,p,1);
929 adns__vbuf_appendq(vb,"\"",1);
931 r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
934 r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
936 st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
940 str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
941 memcpy(str,vb->buf,vb->used);
947 static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
949 if (pai->qu->typei->typekey & adns__qtf_mail822) {
950 return pap_mailbox822(pai, cbyte_io, max, mb_r);
952 return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok);
956 static adns_status csp_mailbox(vbuf *vb, const char *mailbox) {
957 return csp_domain(vb,mailbox);
964 static adns_status pa_rp(const parseinfo *pai, int cbyte,
965 int max, void *datap) {
966 adns_rr_strpair *rrp= datap;
969 st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
972 st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
975 if (cbyte != max) return adns_s_invaliddata;
979 static adns_status cs_rp(vbuf *vb, const void *datap) {
980 const adns_rr_strpair *rrp= datap;
983 st= csp_mailbox(vb,rrp->array[0]); if (st) return st;
985 st= csp_domain(vb,rrp->array[1]); if (st) return st;
994 static adns_status pa_soa(const parseinfo *pai, int cbyte,
995 int max, void *datap) {
996 adns_rr_soa *rrp= datap;
997 const byte *dgram= pai->dgram;
1001 st= pap_domain(pai, &cbyte, max, &rrp->mname,
1002 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1005 st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
1008 if (cbyte+20 != max) return adns_s_invaliddata;
1010 for (i=0; i<5; i++) {
1013 (&rrp->serial)[i]= (msw<<16) | lsw;
1019 static void mf_soa(adns_query qu, void *datap) {
1020 adns_rr_soa *rrp= datap;
1022 adns__makefinal_str(qu,&rrp->mname);
1023 adns__makefinal_str(qu,&rrp->rname);
1026 static adns_status cs_soa(vbuf *vb, const void *datap) {
1027 const adns_rr_soa *rrp= datap;
1032 st= csp_domain(vb,rrp->mname); if (st) return st;
1034 st= csp_mailbox(vb,rrp->rname); if (st) return st;
1036 for (i=0; i<5; i++) {
1037 sprintf(buf," %lu",(&rrp->serial)[i]);
1045 * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
1048 static adns_status ckl_srv(adns_state ads, adns_queryflags flags,
1049 union checklabel_state *cls, qcontext *ctx,
1050 int labnum, const char *label, int lablen) {
1051 if (labnum < 2 && !(flags & adns_qf_quoteok_query)) {
1052 if (!lablen || label[0] != '_') return adns_s_querydomaininvalid;
1055 return adns__ckl_hostname(ads, flags, cls, ctx, labnum, label, lablen);
1058 static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max,
1060 /* might be adns_rr_srvraw* */) {
1061 const byte *dgram= pai->dgram;
1065 if ((*cbyte_io += 6) > max) return adns_s_invaliddata;
1067 rrp->priority= GET_W(cbyte, ti);
1068 rrp->weight= GET_W(cbyte, ti);
1069 rrp->port= GET_W(cbyte, ti);
1073 static adns_status pa_srvraw(const parseinfo *pai, int cbyte,
1074 int max, void *datap) {
1075 adns_rr_srvraw *rrp= datap;
1078 st= pap_srv_begin(pai,&cbyte,max,datap);
1081 st= pap_domain(pai, &cbyte, max, &rrp->host,
1082 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1085 if (cbyte != max) return adns_s_invaliddata;
1089 static adns_status pa_srvha(const parseinfo *pai, int cbyte,
1090 int max, void *datap) {
1091 adns_rr_srvha *rrp= datap;
1094 st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st;
1095 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st;
1096 if (cbyte != max) return adns_s_invaliddata;
1100 static void mf_srvraw(adns_query qu, void *datap) {
1101 adns_rr_srvraw *rrp= datap;
1102 adns__makefinal_str(qu, &rrp->host);
1105 static void mf_srvha(adns_query qu, void *datap) {
1106 adns_rr_srvha *rrp= datap;
1107 mfp_hostaddr(qu,&rrp->ha);
1110 static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) {
1111 const adns_rr_srvraw *ap= datap_a, *bp= datap_b;
1112 /* might be const adns_rr_svhostaddr* */
1114 if (ap->priority < bp->priority) return 0;
1115 if (ap->priority > bp->priority) return 1;
1119 static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp
1120 /* might be adns_rr_srvraw* */) {
1122 sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port);
1127 static adns_status cs_srvraw(vbuf *vb, const void *datap) {
1128 const adns_rr_srvraw *rrp= datap;
1131 st= csp_srv_begin(vb,(const void*)rrp); if (st) return st;
1132 return csp_domain(vb,rrp->host);
1135 static adns_status cs_srvha(vbuf *vb, const void *datap) {
1136 const adns_rr_srvha *rrp= datap;
1139 st= csp_srv_begin(vb,(const void*)datap); if (st) return st;
1140 return csp_hostaddr(vb,&rrp->ha);
1143 static void postsort_srv(adns_state ads, void *array, int nrrs,int rrsz,
1144 const struct typeinfo *typei) {
1145 /* we treat everything in the array as if it were an adns_rr_srvha
1146 * even though the array might be of adns_rr_srvraw. That's OK
1147 * because they have the same prefix, which is all we access.
1148 * We use rrsz, too, rather than naive array indexing, of course.
1150 char *workbegin, *workend, *search, *arrayend;
1151 const adns_rr_srvha *rr;
1152 union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp;
1153 int cpriority, totalweight, runtotal;
1156 assert(rrsz <= sizeof(rrtmp));
1157 for (workbegin= array, arrayend= workbegin + rrsz * nrrs;
1158 workbegin < arrayend;
1159 workbegin= workend) {
1160 cpriority= (rr=(void*)workbegin)->priority;
1162 for (workend= workbegin, totalweight= 0;
1163 workend < arrayend && (rr=(void*)workend)->priority == cpriority;
1165 totalweight += rr->weight;
1168 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1169 * cpriority. From now on, workbegin points to the `remaining'
1170 * records: we select one record at a time (RFC2782 `Usage rules'
1171 * and `Format of the SRV RR' subsection `Weight') to place at
1172 * workbegin (swapping with the one that was there, and then
1173 * advance workbegin. */
1175 workbegin + rrsz < workend; /* don't bother if just one */
1176 workbegin += rrsz) {
1178 randval= nrand48(ads->rand48xsubi);
1179 randval %= (totalweight + 1);
1180 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1181 * totalweight must be <= 2^26 so probability nonuniformity is
1182 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1183 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1186 for (search=workbegin, runtotal=0;
1187 (runtotal += (rr=(void*)search)->weight) < randval;
1189 assert(search < arrayend);
1190 totalweight -= rr->weight;
1191 if (search != workbegin) {
1192 memcpy(&rrtmp, workbegin, rrsz);
1193 memcpy(workbegin, search, rrsz);
1194 memcpy(search, &rrtmp, rrsz);
1199 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1200 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1201 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1209 static void mf_byteblock(adns_query qu, void *datap) {
1210 adns_rr_byteblock *rrp= datap;
1211 void *bytes= rrp->data;
1212 adns__makefinal_block(qu,&bytes,rrp->len);
1220 static adns_status pa_opaque(const parseinfo *pai, int cbyte,
1221 int max, void *datap) {
1222 adns_rr_byteblock *rrp= datap;
1224 rrp->len= max - cbyte;
1225 rrp->data= adns__alloc_interim(pai->qu, rrp->len);
1226 if (!rrp->data) R_NOMEM;
1227 memcpy(rrp->data, pai->dgram + cbyte, rrp->len);
1231 static adns_status cs_opaque(vbuf *vb, const void *datap) {
1232 const adns_rr_byteblock *rrp= datap;
1237 sprintf(buf,"\\# %d",rrp->len);
1240 for (l= rrp->len, p= rrp->data;
1243 sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]);
1249 sprintf(buf," %02x",*p);
1259 static void mf_flat(adns_query qu, void *data) { }
1265 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1267 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1268 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1269 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1270 adns__ckl_hostname, 0, adns__getrrsz_default, CDR(__VA_ARGS__) }
1271 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
1272 { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1273 GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
1274 adns__ckl_hostname, 0, adns__getrrsz_default, CDR(__VA_ARGS__) }
1278 static const typeinfo typeinfos[] = {
1279 /* Must be in ascending order of rrtype ! */
1280 /* mem-mgmt code rrt fmt member parser comparer printer */
1282 FLAT_TYPE(a, "A", 0, inaddr, inaddr, inaddr,inaddr ),
1283 DEEP_TYPE(ns_raw, "NS", "raw",str, host_raw,0, domain ),
1284 DEEP_TYPE(cname, "CNAME", 0, str, dom_raw, 0, domain ),
1285 DEEP_TYPE(soa_raw,"SOA", "raw",soa, soa, 0, soa ),
1286 DEEP_TYPE(ptr_raw,"PTR", "raw",str, host_raw,0, domain ),
1287 DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,hinfo, 0, hinfo ),
1288 DEEP_TYPE(mx_raw, "MX", "raw",intstr, mx_raw, mx_raw,inthost ),
1289 DEEP_TYPE(txt, "TXT", 0, manyistr, txt, 0, txt ),
1290 DEEP_TYPE(rp_raw, "RP", "raw",strpair, rp, 0, rp ),
1291 FLAT_TYPE(aaaa, "AAAA", 0, in6addr, in6addr, in6addr,in6addr ),
1292 DEEP_TYPE(srv_raw,"SRV", "raw",srvraw , srvraw, srv, srvraw,
1293 .checklabel= ckl_srv, .postsort= postsort_srv),
1295 FLAT_TYPE(addr, "A", "addr", addr, addr, addr, addr,
1296 .getrrsz= gsz_addr),
1297 DEEP_TYPE(ns, "NS", "+addr",hostaddr, hostaddr,hostaddr,hostaddr ),
1298 DEEP_TYPE(ptr, "PTR","checked",str, ptr, 0, domain,
1299 .checklabel= ckl_ptr),
1300 DEEP_TYPE(mx, "MX", "+addr",inthostaddr,mx, mx, inthostaddr, ),
1301 DEEP_TYPE(srv, "SRV","+addr",srvha, srvha, srv, srvha,
1302 .checklabel= ckl_srv, .postsort= postsort_srv),
1304 DEEP_TYPE(soa, "SOA","822", soa, soa, 0, soa ),
1305 DEEP_TYPE(rp, "RP", "822", strpair, rp, 0, rp ),
1308 static const typeinfo typeinfo_unknown=
1309 DEEP_TYPE(unknown,0, "unknown",byteblock,opaque, 0, opaque );
1311 const typeinfo *adns__findtype(adns_rrtype type) {
1312 const typeinfo *begin, *end, *mid;
1314 if (type & adns_r_unknown) return &typeinfo_unknown;
1315 type &= adns_rrt_reprmask;
1317 begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
1319 while (begin < end) {
1320 mid= begin + ((end-begin)>>1);
1321 if (mid->typekey == type) return mid;
1322 if (type > mid->typekey) begin= mid+1;