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 * _addr (pa,di,csp,cs)
54 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
57 * _inthostaddr (mf,cs)
62 * _mailbox (pap +pap_mailbox822)
65 * _srv* (qdpl,(pap),pa,mf,di,(csp),cs,postsort)
70 * within each section:
87 static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max,
88 int *len_r, char **str_r) {
89 /* Neither len_r nor str_r may be null.
90 * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
92 const byte *dgram= pai->dgram;
98 if (cbyte >= max) return adns_s_invaliddata;
100 if (cbyte+l > max) return adns_s_invaliddata;
102 str= adns__alloc_interim(pai->qu, l+1);
106 memcpy(str,dgram+cbyte,l);
115 static adns_status csp_qstring(vbuf *vb, const char *dp, int len) {
121 for (cn=0; cn<len; cn++) {
125 } else if (ch == '"') {
127 } else if (ch >= 32 && ch <= 126) {
128 if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
130 sprintf(buf,"\\x%02x",ch);
143 static void mf_str(adns_query qu, void *datap) {
146 adns__makefinal_str(qu,rrp);
153 static void mf_intstr(adns_query qu, void *datap) {
154 adns_rr_intstr *rrp= datap;
156 adns__makefinal_str(qu,&rrp->str);
163 static void mf_manyistr(adns_query qu, void *datap) {
164 adns_rr_intstr **rrp= datap;
165 adns_rr_intstr *te, *table;
169 for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
171 adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
173 for (te= *rrp; te->i >= 0; te++)
174 adns__makefinal_str(qu,&te->str);
181 static adns_status pa_txt(const parseinfo *pai, int cbyte,
182 int max, void *datap) {
183 adns_rr_intstr **rrp= datap, *table, *te;
184 const byte *dgram= pai->dgram;
185 int ti, tc, l, startbyte;
189 if (cbyte >= max) return adns_s_invaliddata;
191 while (cbyte < max) {
196 if (cbyte != max || !tc) return adns_s_invaliddata;
198 table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
201 for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
202 st= pap_qstring(pai, &cbyte, max, &te->i, &te->str);
205 assert(cbyte == max);
214 static adns_status cs_txt(vbuf *vb, const void *datap) {
215 const adns_rr_intstr *const *rrp= datap;
216 const adns_rr_intstr *current;
220 for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) {
221 if (spc) CSP_ADDSTR(" ");
222 st= csp_qstring(vb,current->str,current->i); if (st) return st;
231 static adns_status cs_hinfo(vbuf *vb, const void *datap) {
232 const adns_rr_intstrpair *rrp= datap;
235 st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st;
237 st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st;
242 * _inaddr (pa,dip,di)
245 static adns_status pa_inaddr(const parseinfo *pai, int cbyte,
246 int max, void *datap) {
247 struct in_addr *storeto= datap;
249 if (max-cbyte != 4) return adns_s_invaliddata;
250 memcpy(storeto, pai->dgram + cbyte, 4);
254 static int search_sortlist(adns_state ads, struct in_addr ad) {
255 const struct sortlist *slp;
258 for (i=0, slp=ads->sortlist;
260 !((ad.s_addr & slp->mask.s_addr) == slp->base.s_addr);
265 static int dip_inaddr(adns_state ads, struct in_addr a, struct in_addr b) {
268 if (!ads->nsortlist) return 0;
270 ai= search_sortlist(ads,a);
271 bi= search_sortlist(ads,b);
275 static int di_inaddr(adns_state ads,
276 const void *datap_a, const void *datap_b) {
277 const struct in_addr *ap= datap_a, *bp= datap_b;
279 return dip_inaddr(ads,*ap,*bp);
282 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
283 const struct in_addr *rrp= datap, rr= *rrp;
286 ia= inet_ntoa(rr); assert(ia);
292 * _addr (pa,di,csp,cs)
295 static adns_status pa_addr(const parseinfo *pai, int cbyte,
296 int max, void *datap) {
297 adns_rr_addr *storeto= datap;
298 const byte *dgram= pai->dgram;
300 if (max-cbyte != 4) return adns_s_invaliddata;
301 storeto->len= sizeof(storeto->addr.inet);
302 memset(&storeto->addr,0,sizeof(storeto->addr.inet));
303 storeto->addr.inet.sin_family= AF_INET;
304 memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
308 static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
309 const adns_rr_addr *ap= datap_a, *bp= datap_b;
311 assert(ap->addr.sa.sa_family == AF_INET);
312 return dip_inaddr(ads, ap->addr.inet.sin_addr, bp->addr.inet.sin_addr);
315 static int div_addr(void *context, const void *datap_a, const void *datap_b) {
316 const adns_state ads= context;
318 return di_addr(ads, datap_a, datap_b);
321 static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
325 switch (rrp->addr.inet.sin_family) {
328 ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia);
332 sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
339 static adns_status cs_addr(vbuf *vb, const void *datap) {
340 const adns_rr_addr *rrp= datap;
342 return csp_addr(vb,rrp);
346 * _domain (pap,csp,cs)
350 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
351 char **domain_r, parsedomain_flags flags) {
355 st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
356 pai->dgram,pai->dglen, cbyte_io, max);
358 if (!pai->qu->vb.used) return adns_s_invaliddata;
360 dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
363 dm[pai->qu->vb.used]= 0;
364 memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
370 static adns_status csp_domain(vbuf *vb, const char *domain) {
372 if (!*domain) CSP_ADDSTR(".");
376 static adns_status cs_domain(vbuf *vb, const void *datap) {
377 const char *const *domainp= datap;
378 return csp_domain(vb,*domainp);
381 static adns_status pa_dom_raw(const parseinfo *pai, int cbyte,
382 int max, void *datap) {
386 st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
389 if (cbyte != max) return adns_s_invaliddata;
397 static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
398 int max, void *datap) {
402 st= pap_domain(pai, &cbyte, max, rrp,
403 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
406 if (cbyte != max) return adns_s_invaliddata;
411 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
414 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
415 int *cbyte_io, int count, int dmstart) {
417 int type, class, rdlen, rdstart, ownermatched;
421 for (rri=0, naddrs=-1; rri<count; rri++) {
422 st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram,
423 pai->dglen, cbyte_io,
424 &type, &class, &ttl, &rdlen, &rdstart,
425 pai->dgram, pai->dglen, dmstart, &ownermatched);
427 if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) {
428 if (naddrs>0) break; else continue;
433 if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_rr_addr)))
435 adns__update_expires(pai->qu,ttl,pai->now);
436 st= pa_addr(pai, rdstart,rdstart+rdlen,
437 pai->qu->vb.buf + naddrs*sizeof(adns_rr_addr));
442 ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_rr_addr));
443 if (!ha->addrs) R_NOMEM;
444 memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_rr_addr));
446 ha->astatus= adns_s_ok;
448 adns__isort(ha->addrs, naddrs, sizeof(adns_rr_addr), pai->qu->vb.buf,
454 static void icb_hostaddr(adns_query parent, adns_query child) {
455 adns_answer *cans= child->answer;
456 adns_rr_hostaddr *rrp= child->ctx.info.hostaddr;
457 adns_state ads= parent->ads;
462 rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs;
463 rrp->addrs= cans->rrs.addr;
464 adns__transfer_interim(child, parent, rrp->addrs,
465 rrp->naddrs*sizeof(adns_rr_addr));
467 if (parent->children.head) {
468 LIST_LINK_TAIL(ads->childw,parent);
470 adns__query_done(parent);
474 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
475 int max, adns_rr_hostaddr *rrp) {
481 adns_queryflags nflags;
483 dmstart= cbyte= *cbyte_io;
484 st= pap_domain(pai, &cbyte, max, &rrp->host,
485 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
489 rrp->astatus= adns_s_ok;
495 st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart);
497 if (rrp->naddrs != -1) return adns_s_ok;
499 st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart);
501 if (rrp->naddrs != -1) return adns_s_ok;
503 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
504 pai->dgram, pai->dglen, dmstart,
505 adns_r_addr, adns_qf_quoteok_query);
509 ctx.callback= icb_hostaddr;
510 ctx.info.hostaddr= rrp;
512 nflags= adns_qf_quoteok_query;
513 if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
515 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
516 &pai->qu->vb, id, nflags, pai->now, &ctx);
519 nqu->parent= pai->qu;
520 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
525 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte,
526 int max, void *datap) {
527 adns_rr_hostaddr *rrp= datap;
530 st= pap_hostaddr(pai, &cbyte, max, rrp);
532 if (cbyte != max) return adns_s_invaliddata;
537 static int dip_hostaddr(adns_state ads,
538 const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
539 if (ap->astatus != bp->astatus) return ap->astatus;
540 if (ap->astatus) return 0;
542 assert(ap->addrs[0].addr.sa.sa_family == AF_INET);
543 assert(bp->addrs[0].addr.sa.sa_family == AF_INET);
544 return dip_inaddr(ads,
545 ap->addrs[0].addr.inet.sin_addr,
546 bp->addrs[0].addr.inet.sin_addr);
549 static int di_hostaddr(adns_state ads,
550 const void *datap_a, const void *datap_b) {
551 const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
553 return dip_hostaddr(ads, ap,bp);
556 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
559 adns__makefinal_str(qu,&rrp->host);
561 adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs));
565 static void mf_hostaddr(adns_query qu, void *datap) {
566 adns_rr_hostaddr *rrp= datap;
568 mfp_hostaddr(qu,rrp);
571 static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
577 st= csp_domain(vb,rrp->host); if (st) return st;
580 CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus));
582 sprintf(buf," %d ",rrp->astatus);
585 CSP_ADDSTR(adns_errabbrev(rrp->astatus));
588 errstr= adns_strerror(rrp->astatus);
589 st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st;
591 if (rrp->naddrs >= 0) {
593 for (i=0; i<rrp->naddrs; i++) {
595 st= csp_addr(vb,&rrp->addrs[i]);
604 static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
605 const adns_rr_hostaddr *rrp= datap;
607 return csp_hostaddr(vb,rrp);
614 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte,
615 int max, void *datap) {
616 const byte *dgram= pai->dgram;
617 adns_rr_intstr *rrp= datap;
621 if (cbyte+2 > max) return adns_s_invaliddata;
624 st= pap_domain(pai, &cbyte, max, &rrp->str,
625 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
628 if (cbyte != max) return adns_s_invaliddata;
632 static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
633 const adns_rr_intstr *ap= datap_a, *bp= datap_b;
635 if (ap->i < bp->i) return 0;
636 if (ap->i > bp->i) return 1;
644 static adns_status pa_mx(const parseinfo *pai, int cbyte,
645 int max, void *datap) {
646 const byte *dgram= pai->dgram;
647 adns_rr_inthostaddr *rrp= datap;
651 if (cbyte+2 > max) return adns_s_invaliddata;
654 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
657 if (cbyte != max) return adns_s_invaliddata;
661 static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
662 const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
664 if (ap->i < bp->i) return 0;
665 if (ap->i > bp->i) return 1;
666 return dip_hostaddr(ads, &ap->ha, &bp->ha);
670 * _inthostaddr (mf,cs)
673 static void mf_inthostaddr(adns_query qu, void *datap) {
674 adns_rr_inthostaddr *rrp= datap;
676 mfp_hostaddr(qu,&rrp->ha);
679 static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
680 const adns_rr_inthostaddr *rrp= datap;
683 sprintf(buf,"%u ",rrp->i);
686 return csp_hostaddr(vb,&rrp->ha);
693 static adns_status cs_inthost(vbuf *vb, const void *datap) {
694 const adns_rr_intstr *rrp= datap;
697 sprintf(buf,"%u ",rrp->i);
699 return csp_domain(vb,rrp->str);
703 * _ptr (pa, +icb_ptr)
706 static void icb_ptr(adns_query parent, adns_query child) {
707 adns_answer *cans= child->answer;
708 const adns_rr_addr *queried, *found;
709 adns_state ads= parent->ads;
712 if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
713 adns__query_fail(parent,adns_s_inconsistent);
715 } else if (cans->status) {
716 adns__query_fail(parent,cans->status);
720 queried= &parent->ctx.info.ptr_parent_addr;
721 for (i=0, found=cans->rrs.addr; i<cans->nrrs; i++, found++) {
722 if (queried->len == found->len &&
723 !memcmp(&queried->addr,&found->addr,queried->len)) {
724 if (!parent->children.head) {
725 adns__query_done(parent);
728 LIST_LINK_TAIL(ads->childw,parent);
734 adns__query_fail(parent,adns_s_inconsistent);
737 static adns_status pa_ptr(const parseinfo *pai, int dmstart,
738 int max, void *datap) {
739 static const char *(expectdomain[])= { DNS_INADDR_ARPA };
748 int cbyte, i, lablen, labstart, l, id;
753 st= pap_domain(pai, &cbyte, max, rrp,
754 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
756 if (cbyte != max) return adns_s_invaliddata;
758 ap= &pai->qu->ctx.info.ptr_parent_addr;
760 adns__findlabel_start(&fls, pai->ads, -1, pai->qu,
761 pai->qu->query_dgram, pai->qu->query_dglen,
762 pai->qu->query_dglen, DNS_HDRSIZE, 0);
763 for (i=0; i<4; i++) {
764 st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st);
765 if (lablen<=0 || lablen>3) return adns_s_querydomainwrong;
766 memcpy(labbuf, pai->qu->query_dgram + labstart, lablen);
768 ipv[3-i]= strtoul(labbuf,&ep,10);
769 if (*ep) return adns_s_querydomainwrong;
770 if (lablen>1 && pai->qu->query_dgram[labstart]=='0')
771 return adns_s_querydomainwrong;
773 for (i=0; i<sizeof(expectdomain)/sizeof(*expectdomain); i++) {
774 st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st);
775 l= strlen(expectdomain[i]);
777 memcmp(pai->qu->query_dgram + labstart, expectdomain[i], l))
778 return adns_s_querydomainwrong;
780 st= adns__findlabel_next(&fls,&lablen,0); assert(!st);
781 if (lablen) return adns_s_querydomainwrong;
783 ap->len= sizeof(struct sockaddr_in);
784 memset(&ap->addr,0,sizeof(ap->addr.inet));
785 ap->addr.inet.sin_family= AF_INET;
786 ap->addr.inet.sin_addr.s_addr=
787 htonl((ipv[0]<<24) | (ipv[1]<<16) | (ipv[2]<<8) | (ipv[3]));
790 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
791 pai->dgram, pai->dglen, dmstart,
792 adns_r_addr, adns_qf_quoteok_query);
796 ctx.callback= icb_ptr;
797 memset(&ctx.info,0,sizeof(ctx.info));
798 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
800 adns_qf_quoteok_query, pai->now, &ctx);
803 nqu->parent= pai->qu;
804 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
812 static void mf_strpair(adns_query qu, void *datap) {
813 adns_rr_strpair *rrp= datap;
815 adns__makefinal_str(qu,&rrp->array[0]);
816 adns__makefinal_str(qu,&rrp->array[1]);
823 static void mf_intstrpair(adns_query qu, void *datap) {
824 adns_rr_intstrpair *rrp= datap;
826 adns__makefinal_str(qu,&rrp->array[0].str);
827 adns__makefinal_str(qu,&rrp->array[1].str);
834 static adns_status pa_hinfo(const parseinfo *pai, int cbyte,
835 int max, void *datap) {
836 adns_rr_intstrpair *rrp= datap;
840 for (i=0; i<2; i++) {
841 st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
845 if (cbyte != max) return adns_s_invaliddata;
854 static adns_status pap_mailbox822(const parseinfo *pai,
855 int *cbyte_io, int max, char **mb_r) {
856 int lablen, labstart, i, needquote, c, r, neednorm;
857 const unsigned char *p;
865 adns__findlabel_start(&fls, pai->ads,
867 pai->dgram, pai->dglen, max,
868 *cbyte_io, cbyte_io);
869 st= adns__findlabel_next(&fls,&lablen,&labstart);
871 adns__vbuf_appendstr(vb,".");
876 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
878 if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
879 if (c == '.' && !neednorm) neednorm= 1;
880 else if (c==' ' || c>=127 || ctype_822special(c)) needquote++;
884 if (needquote || neednorm) {
885 r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
886 adns__vbuf_appendq(vb,"\"",1);
887 for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
889 if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1);
890 adns__vbuf_appendq(vb,p,1);
892 adns__vbuf_appendq(vb,"\"",1);
894 r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
897 r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
899 st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
903 str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
904 memcpy(str,vb->buf,vb->used);
910 static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
912 if (pai->qu->typei->typekey & adns__qtf_mail822) {
913 return pap_mailbox822(pai, cbyte_io, max, mb_r);
915 return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok);
919 static adns_status csp_mailbox(vbuf *vb, const char *mailbox) {
920 return csp_domain(vb,mailbox);
927 static adns_status pa_rp(const parseinfo *pai, int cbyte,
928 int max, void *datap) {
929 adns_rr_strpair *rrp= datap;
932 st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
935 st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
938 if (cbyte != max) return adns_s_invaliddata;
942 static adns_status cs_rp(vbuf *vb, const void *datap) {
943 const adns_rr_strpair *rrp= datap;
946 st= csp_mailbox(vb,rrp->array[0]); if (st) return st;
948 st= csp_domain(vb,rrp->array[1]); if (st) return st;
957 static adns_status pa_soa(const parseinfo *pai, int cbyte,
958 int max, void *datap) {
959 adns_rr_soa *rrp= datap;
960 const byte *dgram= pai->dgram;
964 st= pap_domain(pai, &cbyte, max, &rrp->mname,
965 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
968 st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
971 if (cbyte+20 != max) return adns_s_invaliddata;
973 for (i=0; i<5; i++) {
976 (&rrp->serial)[i]= (msw<<16) | lsw;
982 static void mf_soa(adns_query qu, void *datap) {
983 adns_rr_soa *rrp= datap;
985 adns__makefinal_str(qu,&rrp->mname);
986 adns__makefinal_str(qu,&rrp->rname);
989 static adns_status cs_soa(vbuf *vb, const void *datap) {
990 const adns_rr_soa *rrp= datap;
995 st= csp_domain(vb,rrp->mname); if (st) return st;
997 st= csp_mailbox(vb,rrp->rname); if (st) return st;
999 for (i=0; i<5; i++) {
1000 sprintf(buf," %lu",(&rrp->serial)[i]);
1008 * _srv* (pa*2,di,cs*2,qdpl,postsort)
1011 static adns_status qdpl_srv(adns_state ads,
1012 const char **p_io, const char *pe, int labelnum,
1013 char label_r[DNS_MAXDOMAIN], int *ll_io,
1014 adns_queryflags flags,
1015 const typeinfo *typei) {
1020 if (labelnum < 2 && !(flags & adns_qf_quoteok_query)) {
1021 useflags= adns_qf_quoteok_query;
1027 st= adns__qdpl_normal(ads, p_io,pe, labelnum,label_r, ll_io, useflags,typei);
1032 if (!ll || label_r[0]!='_')
1033 return adns_s_querydomaininvalid;
1034 if (memchr(p_orig+1, '\\', pe - (p_orig+1)))
1035 return adns_s_querydomaininvalid;
1040 static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max,
1042 /* might be adns_rr_srvraw* */) {
1043 const byte *dgram= pai->dgram;
1047 if ((*cbyte_io += 6) > max) return adns_s_invaliddata;
1049 rrp->priority= GET_W(cbyte, ti);
1050 rrp->weight= GET_W(cbyte, ti);
1051 rrp->port= GET_W(cbyte, ti);
1055 static adns_status pa_srvraw(const parseinfo *pai, int cbyte,
1056 int max, void *datap) {
1057 adns_rr_srvraw *rrp= datap;
1060 st= pap_srv_begin(pai,&cbyte,max,datap);
1063 st= pap_domain(pai, &cbyte, max, &rrp->host,
1064 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1067 if (cbyte != max) return adns_s_invaliddata;
1071 static adns_status pa_srvha(const parseinfo *pai, int cbyte,
1072 int max, void *datap) {
1073 adns_rr_srvha *rrp= datap;
1076 st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st;
1077 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st;
1078 if (cbyte != max) return adns_s_invaliddata;
1082 static void mf_srvraw(adns_query qu, void *datap) {
1083 adns_rr_srvraw *rrp= datap;
1084 adns__makefinal_str(qu, &rrp->host);
1087 static void mf_srvha(adns_query qu, void *datap) {
1088 adns_rr_srvha *rrp= datap;
1089 mfp_hostaddr(qu,&rrp->ha);
1092 static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) {
1093 const adns_rr_srvraw *ap= datap_a, *bp= datap_b;
1094 /* might be const adns_rr_svhostaddr* */
1096 if (ap->priority < bp->priority) return 0;
1097 if (ap->priority > bp->priority) return 1;
1101 static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp
1102 /* might be adns_rr_srvraw* */) {
1104 sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port);
1109 static adns_status cs_srvraw(vbuf *vb, const void *datap) {
1110 const adns_rr_srvraw *rrp= datap;
1113 st= csp_srv_begin(vb,(const void*)rrp); if (st) return st;
1114 return csp_domain(vb,rrp->host);
1117 static adns_status cs_srvha(vbuf *vb, const void *datap) {
1118 const adns_rr_srvha *rrp= datap;
1121 st= csp_srv_begin(vb,(const void*)datap); if (st) return st;
1122 return csp_hostaddr(vb,&rrp->ha);
1125 static void postsort_srv(adns_state ads, void *array, int nrrs,
1126 const struct typeinfo *typei) {
1127 /* we treat everything in the array as if it were an adns_rr_srvha
1128 * even though the array might be of adns_rr_srvraw. That's OK
1129 * because they have the same prefix, which is all we access.
1130 * We use typei->rrsz, too, rather than naive array indexing, of course.
1132 char *workbegin, *workend, *search, *arrayend;
1133 const adns_rr_srvha *rr;
1134 union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp;
1135 int cpriority, totalweight, runtotal;
1138 for (workbegin= array, arrayend= workbegin + typei->rrsz * nrrs;
1139 workbegin < arrayend;
1140 workbegin= workend) {
1141 cpriority= (rr=(void*)workbegin)->priority;
1143 for (workend= workbegin, totalweight= 0;
1144 workend < arrayend && (rr=(void*)workend)->priority == cpriority;
1145 workend += typei->rrsz) {
1146 totalweight += rr->weight;
1149 /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1150 * cpriority. From now on, workbegin points to the `remaining'
1151 * records: we select one record at a time (RFC2782 `Usage rules'
1152 * and `Format of the SRV RR' subsection `Weight') to place at
1153 * workbegin (swapping with the one that was there, and then
1154 * advance workbegin. */
1156 workbegin + typei->rrsz < workend; /* don't bother if just one */
1157 workbegin += typei->rrsz) {
1159 randval= nrand48(ads->rand48xsubi);
1160 randval %= (totalweight + 1);
1161 /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1162 * totalweight must be <= 2^26 so probability nonuniformity is
1163 * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1164 * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1167 for (search=workbegin, runtotal=0;
1168 (runtotal += (rr=(void*)search)->weight) < randval;
1169 search += typei->rrsz);
1170 assert(search < arrayend);
1171 totalweight -= rr->weight;
1172 if (search != workbegin) {
1173 memcpy(&rrtmp, workbegin, typei->rrsz);
1174 memcpy(workbegin, search, typei->rrsz);
1175 memcpy(search, &rrtmp, typei->rrsz);
1180 * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1181 * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1182 * ./adnshost_s -t srv- _jabber._tcp.jabber.org
1190 static void mf_byteblock(adns_query qu, void *datap) {
1191 adns_rr_byteblock *rrp= datap;
1192 void *bytes= rrp->data;
1193 adns__makefinal_block(qu,&bytes,rrp->len);
1201 static adns_status pa_opaque(const parseinfo *pai, int cbyte,
1202 int max, void *datap) {
1203 adns_rr_byteblock *rrp= datap;
1205 rrp->len= max - cbyte;
1206 rrp->data= adns__alloc_interim(pai->qu, rrp->len);
1207 if (!rrp->data) R_NOMEM;
1208 memcpy(rrp->data, pai->dgram + cbyte, rrp->len);
1212 static adns_status cs_opaque(vbuf *vb, const void *datap) {
1213 const adns_rr_byteblock *rrp= datap;
1218 sprintf(buf,"\\# %d",rrp->len);
1221 for (l= rrp->len, p= rrp->data;
1224 sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]);
1230 sprintf(buf," %02x",*p);
1240 static void mf_flat(adns_query qu, void *data) { }
1246 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
1248 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
1249 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
1251 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1252 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1253 printer,parser,comparer, adns__qdpl_normal,0 }
1254 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
1255 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat, \
1256 printer,parser,comparer, adns__qdpl_normal,0 }
1257 #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer,qdpl,postsort) \
1258 { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
1259 printer,parser,comparer,qdpl,postsort }
1261 static const typeinfo typeinfos[] = {
1262 /* Must be in ascending order of rrtype ! */
1263 /* mem-mgmt code rrt fmt member parser comparer printer */
1265 FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr,cs_inaddr ),
1266 DEEP_TYPE(ns_raw, "NS", "raw",str, pa_host_raw,0, cs_domain ),
1267 DEEP_TYPE(cname, "CNAME", 0, str, pa_dom_raw, 0, cs_domain ),
1268 DEEP_TYPE(soa_raw,"SOA", "raw",soa, pa_soa, 0, cs_soa ),
1269 DEEP_TYPE(ptr_raw,"PTR", "raw",str, pa_host_raw,0, cs_domain ),
1270 DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,pa_hinfo, 0, cs_hinfo ),
1271 DEEP_TYPE(mx_raw, "MX", "raw",intstr, pa_mx_raw, di_mx_raw,cs_inthost ),
1272 DEEP_TYPE(txt, "TXT", 0, manyistr,pa_txt, 0, cs_txt ),
1273 DEEP_TYPE(rp_raw, "RP", "raw",strpair, pa_rp, 0, cs_rp ),
1274 XTRA_TYPE(srv_raw,"SRV", "raw",srvraw , pa_srvraw, di_srv, cs_srvraw,
1275 qdpl_srv, postsort_srv),
1277 FLAT_TYPE(addr, "A", "addr", addr, pa_addr, di_addr, cs_addr ),
1278 DEEP_TYPE(ns, "NS", "+addr",hostaddr,pa_hostaddr,di_hostaddr,cs_hostaddr ),
1279 DEEP_TYPE(ptr, "PTR","checked",str, pa_ptr, 0, cs_domain ),
1280 DEEP_TYPE(mx, "MX", "+addr",inthostaddr,pa_mx, di_mx, cs_inthostaddr),
1281 XTRA_TYPE(srv, "SRV","+addr",srvha, pa_srvha, di_srv, cs_srvha,
1282 qdpl_srv, postsort_srv),
1284 DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0, cs_soa ),
1285 DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0, cs_rp ),
1288 static const typeinfo typeinfo_unknown=
1289 DEEP_TYPE(unknown,0, "unknown",byteblock,pa_opaque, 0, cs_opaque );
1291 const typeinfo *adns__findtype(adns_rrtype type) {
1292 const typeinfo *begin, *end, *mid;
1294 if (type & adns_r_unknown) return &typeinfo_unknown;
1296 begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
1298 while (begin < end) {
1299 mid= begin + ((end-begin)>>1);
1300 if (mid->typekey == type) return mid;
1301 if (type > mid->typekey) begin= mid+1;