mdw@git.distorted.org.uk Git - adns/blob - src/types.c

   1 /*
   2  * types.c
   3  * - RR-type-specific code, and the machinery to call it
   4  */
   5 /*
   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.)
  11  *
  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)
  15  *  any later version.
  16  *
  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.
  21  *
  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.
  25  */
  26
  27 #include <stdlib.h>
  28
  29 #include <sys/types.h>
  30 #include <sys/socket.h>
  31 #include <netinet/in.h>
  32 #include <arpa/inet.h>
  33
  34 #include "internal.h"
  35
  36 #define R_NOMEM       return adns_s_nomemory
  37 #define CSP_ADDSTR(s) do {                      \
  38     if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \
  39   } while (0)
  40
  41 /*
  42  * order of sections:
  43  *
  44  * _string                    (pap)
  45  * _textdata, _qstring        (csp)
  46  * _str                       (mf,cs)
  47  * _intstr                    (mf,csp,cs)
  48  * _manyistr                  (mf,cs)
  49  * _txt                       (pa)
  50  * _inaddr                    (pa,di,cs +search_sortlist, dip_genaddr)
  51  * _addr                      (pa,di,div,csp,cs,gsz
  52  *                              +search_sortlist_sa, dip_sockaddr)
  53  * _domain                    (pap,csp,cs)
  54  * _dom_raw                   (pa)
  55  * _host_raw                  (pa)
  56  * _hostaddr                  (pap,pa,dip,di,mfp,mf,csp,cs
  57  *                              +pap_findaddrs, icb_hostaddr)
  58  * _mx_raw                    (pa,di)
  59  * _mx                        (pa,di)
  60  * _inthostaddr               (mf,cs)
  61  * _inthost                   (cs)
  62  * _ptr                       (ckl,pa +icb_ptr)
  63  * _strpair                   (mf)
  64  * _intstrpair                (mf)
  65  * _hinfo                     (pa)
  66  * _mailbox                   (pap,csp +pap_mailbox822)
  67  * _rp                        (pa,cs)
  68  * _soa                       (pa,mf,cs)
  69  * _srv*                      (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
  70  * _byteblock                 (mf)
  71  * _opaque                    (pa,cs)
  72  * _flat                      (mf)
  73  *
  74  * within each section:
  75  *    ckl_*
  76  *    pap_*
  77  *    pa_*
  78  *    dip_*
  79  *    di_*
  80  *    mfp_*
  81  *    mf_*
  82  *    csp_*
  83  *    cs_*
  84  *    gsz_*
  85  *    postsort_*
  86  */
  87
  88 /*
  89  * _qstring               (pap,csp)
  90  */
  91
  92 static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max,
  93                               int *len_r, char **str_r) {
  94   /* Neither len_r nor str_r may be null.
  95    * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
  96    */
  97   const byte *dgram= pai->dgram;
  98   int l, cbyte;
  99   char *str;
 100
 101   cbyte= *cbyte_io;
 102
 103   if (cbyte >= max) return adns_s_invaliddata;
 104   GET_B(cbyte,l);
 105   if (cbyte+l > max) return adns_s_invaliddata;
 106
 107   str= adns__alloc_interim(pai->qu, l+1);
 108   if (!str) R_NOMEM;
 109
 110   str[l]= 0;
 111   memcpy(str,dgram+cbyte,l);
 112
 113   *len_r= l;
 114   *str_r= str;
 115   *cbyte_io= cbyte+l;
 116
 117   return adns_s_ok;
 118 }
 119
 120 static adns_status csp_qstring(vbuf *vb, const char *dp, int len) {
 121   unsigned char ch;
 122   char buf[10];
 123   int cn;
 124
 125   CSP_ADDSTR("\"");
 126   for (cn=0; cn<len; cn++) {
 127     ch= *dp++;
 128     if (ch == '\\') {
 129       CSP_ADDSTR("\\\\");
 130     } else if (ch == '"') {
 131       CSP_ADDSTR("\\\"");
 132     } else if (ch >= 32 && ch <= 126) {
 133       if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
 134     } else {
 135       sprintf(buf,"\\x%02x",ch);
 136       CSP_ADDSTR(buf);
 137     }
 138   }
 139   CSP_ADDSTR("\"");
 140
 141   return adns_s_ok;
 142 }
 143
 144 /*
 145  * _str  (mf)
 146  */
 147
 148 static void mf_str(adns_query qu, void *datap) {
 149   char **rrp= datap;
 150
 151   adns__makefinal_str(qu,rrp);
 152 }
 153
 154 /*
 155  * _intstr  (mf)
 156  */
 157
 158 static void mf_intstr(adns_query qu, void *datap) {
 159   adns_rr_intstr *rrp= datap;
 160
 161   adns__makefinal_str(qu,&rrp->str);
 162 }
 163
 164 /*
 165  * _manyistr   (mf)
 166  */
 167
 168 static void mf_manyistr(adns_query qu, void *datap) {
 169   adns_rr_intstr **rrp= datap;
 170   adns_rr_intstr *te, *table;
 171   void *tablev;
 172   int tc;
 173
 174   for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
 175   tablev= *rrp;
 176   adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
 177   *rrp= table= tablev;
 178   for (te= *rrp; te->i >= 0; te++)
 179     adns__makefinal_str(qu,&te->str);
 180 }
 181
 182 /*
 183  * _txt   (pa,cs)
 184  */
 185
 186 static adns_status pa_txt(const parseinfo *pai, int cbyte,
 187                           int max, void *datap) {
 188   adns_rr_intstr **rrp= datap, *table, *te;
 189   const byte *dgram= pai->dgram;
 190   int ti, tc, l, startbyte;
 191   adns_status st;
 192
 193   startbyte= cbyte;
 194   if (cbyte >= max) return adns_s_invaliddata;
 195   tc= 0;
 196   while (cbyte < max) {
 197     GET_B(cbyte,l);
 198     cbyte+= l;
 199     tc++;
 200   }
 201   if (cbyte != max || !tc) return adns_s_invaliddata;
 202
 203   table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
 204   if (!table) R_NOMEM;
 205
 206   for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
 207     st= pap_qstring(pai, &cbyte, max, &te->i, &te->str);
 208     if (st) return st;
 209   }
 210   assert(cbyte == max);
 211
 212   te->i= -1;
 213   te->str= 0;
 214
 215   *rrp= table;
 216   return adns_s_ok;
 217 }
 218
 219 static adns_status cs_txt(vbuf *vb, const void *datap) {
 220   const adns_rr_intstr *const *rrp= datap;
 221   const adns_rr_intstr *current;
 222   adns_status st;
 223   int spc;
 224
 225   for (current= *rrp, spc=0;  current->i >= 0;  current++, spc=1) {
 226     if (spc) CSP_ADDSTR(" ");
 227     st= csp_qstring(vb,current->str,current->i); if (st) return st;
 228   }
 229   return adns_s_ok;
 230 }
 231
 232 /*
 233  * _hinfo   (cs)
 234  */
 235
 236 static adns_status cs_hinfo(vbuf *vb, const void *datap) {
 237   const adns_rr_intstrpair *rrp= datap;
 238   adns_status st;
 239
 240   st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i);  if (st) return st;
 241   CSP_ADDSTR(" ");
 242   st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i);  if (st) return st;
 243   return adns_s_ok;
 244 }
 245
 246 /*
 247  * _inaddr   (pa,di,cs +search_sortlist, dip_genaddr)
 248  */
 249
 250 static adns_status pa_inaddr(const parseinfo *pai, int cbyte,
 251                              int max, void *datap) {
 252   struct in_addr *storeto= datap;
 253
 254   if (max-cbyte != 4) return adns_s_invaliddata;
 255   memcpy(storeto, pai->dgram + cbyte, 4);
 256   return adns_s_ok;
 257 }
 258
 259 static int search_sortlist(adns_state ads, int af, const void *ad) {
 260   const struct sortlist *slp;
 261   int i;
 262
 263   for (i=0, slp=ads->sortlist;
 264        i<ads->nsortlist &&
 265          !adns__addr_match_p(af,ad, slp->af,&slp->base,&slp->mask);
 266        i++, slp++);
 267   return i;
 268 }
 269
 270 static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) {
 271   int ai, bi;
 272
 273   if (!ads->nsortlist) return 0;
 274
 275   ai= search_sortlist(ads,af,a);
 276   bi= search_sortlist(ads,af,b);
 277   return bi<ai;
 278 }
 279
 280 static int di_inaddr(adns_state ads,
 281                      const void *datap_a, const void *datap_b) {
 282   return dip_genaddr(ads,AF_INET,datap_a,datap_b);
 283 }
 284
 285 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
 286   const struct in_addr *rrp= datap, rr= *rrp;
 287   const char *ia;
 288
 289   ia= inet_ntoa(rr); assert(ia);
 290   CSP_ADDSTR(ia);
 291   return adns_s_ok;
 292 }
 293
 294 /*
 295  * _addr   (pa,di,div,csp,cs,gsz +search_sortlist_sa, dip_sockaddr)
 296  */
 297
 298 static adns_status pa_addr(const parseinfo *pai, int cbyte,
 299                            int max, void *datap) {
 300   adns_rr_addr *storeto= datap;
 301   const byte *dgram= pai->dgram;
 302
 303   if (max-cbyte != 4) return adns_s_invaliddata;
 304   storeto->len= sizeof(storeto->addr.inet);
 305   memset(&storeto->addr,0,sizeof(storeto->addr.inet));
 306   storeto->addr.inet.sin_family= AF_INET;
 307   memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
 308   return adns_s_ok;
 309 }
 310
 311 static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) {
 312   union gen_addr a;
 313   adns__sockaddr_extract(sa, &a, 0);
 314   return search_sortlist(ads, sa->sa_family, &a);
 315 }
 316
 317 static int dip_sockaddr(adns_state ads,
 318                         const struct sockaddr *sa,
 319                         const struct sockaddr *sb) {
 320   if (!ads->sortlist) return 0;
 321   return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb);
 322 }
 323
 324 static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
 325   const adns_rr_addr *ap= datap_a, *bp= datap_b;
 326   return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa);
 327 }
 328
 329 static int div_addr(void *context, const void *datap_a, const void *datap_b) {
 330   const adns_state ads= context;
 331
 332   return di_addr(ads, datap_a, datap_b);
 333 }
 334
 335 static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
 336   const char *ia;
 337   char buf[30];
 338
 339   switch (rrp->addr.inet.sin_family) {
 340   case AF_INET:
 341     CSP_ADDSTR("INET ");
 342     ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia);
 343     CSP_ADDSTR(ia);
 344     break;
 345   default:
 346     sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
 347     CSP_ADDSTR(buf);
 348     break;
 349   }
 350   return adns_s_ok;
 351 }
 352
 353 static adns_status cs_addr(vbuf *vb, const void *datap) {
 354   const adns_rr_addr *rrp= datap;
 355
 356   return csp_addr(vb,rrp);
 357 }
 358
 359 static int gsz_addr(const typeinfo *typei, adns_rrtype type) {
 360   return type & adns__qtf_bigaddr ?
 361     sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only);
 362 }
 363
 364 /*
 365  * _domain      (pap,csp,cs)
 366  * _dom_raw     (pa)
 367  */
 368
 369 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
 370                               char **domain_r, parsedomain_flags flags) {
 371   adns_status st;
 372   char *dm;
 373
 374   st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
 375                          pai->dgram,pai->dglen, cbyte_io, max);
 376   if (st) return st;
 377   if (!pai->qu->vb.used) return adns_s_invaliddata;
 378
 379   dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
 380   if (!dm) R_NOMEM;
 381
 382   dm[pai->qu->vb.used]= 0;
 383   memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
 384
 385   *domain_r= dm;
 386   return adns_s_ok;
 387 }
 388
 389 static adns_status csp_domain(vbuf *vb, const char *domain) {
 390   CSP_ADDSTR(domain);
 391   if (!*domain) CSP_ADDSTR(".");
 392   return adns_s_ok;
 393 }
 394
 395 static adns_status cs_domain(vbuf *vb, const void *datap) {
 396   const char *const *domainp= datap;
 397   return csp_domain(vb,*domainp);
 398 }
 399
 400 static adns_status pa_dom_raw(const parseinfo *pai, int cbyte,
 401                               int max, void *datap) {
 402   char **rrp= datap;
 403   adns_status st;
 404
 405   st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
 406   if (st) return st;
 407
 408   if (cbyte != max) return adns_s_invaliddata;
 409   return adns_s_ok;
 410 }
 411
 412 /*
 413  * _host_raw   (pa)
 414  */
 415
 416 static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
 417                                int max, void *datap) {
 418   char **rrp= datap;
 419   adns_status st;
 420
 421   st= pap_domain(pai, &cbyte, max, rrp,
 422                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 423   if (st) return st;
 424
 425   if (cbyte != max) return adns_s_invaliddata;
 426   return adns_s_ok;
 427 }
 428
 429 /*
 430  * _hostaddr   (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
 431  */
 432
 433 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
 434                                  size_t addrsz,
 435                                  int *cbyte_io, int count, int dmstart) {
 436   int rri, naddrs;
 437   int type, class, rdlen, rdstart, ownermatched;
 438   unsigned long ttl;
 439   adns_status st;
 440
 441   for (rri=0, naddrs=-1; rri<count; rri++) {
 442     st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram,
 443                             pai->dglen, cbyte_io,
 444                             &type, &class, &ttl, &rdlen, &rdstart,
 445                             pai->dgram, pai->dglen, dmstart, &ownermatched);
 446     if (st) return st;
 447     if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) {
 448       if (naddrs>0) break; else continue;
 449     }
 450     if (naddrs == -1) {
 451       naddrs= 0;
 452     }
 453     if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz))
 454       R_NOMEM;
 455     adns__update_expires(pai->qu,ttl,pai->now);
 456     st= pa_addr(pai, rdstart,rdstart+rdlen, pai->qu->vb.buf + naddrs*addrsz);
 457     if (st) return st;
 458     naddrs++;
 459   }
 460   if (naddrs >= 0) {
 461     ha->addrs= adns__alloc_interim(pai->qu, naddrs*addrsz);
 462     if (!ha->addrs) R_NOMEM;
 463     memcpy(ha->addrs, pai->qu->vb.buf, naddrs*addrsz);
 464     ha->naddrs= naddrs;
 465     ha->astatus= adns_s_ok;
 466
 467     adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf,
 468                 div_addr, pai->ads);
 469   }
 470   return adns_s_ok;
 471 }
 472
 473 static void icb_hostaddr(adns_query parent, adns_query child) {
 474   adns_answer *cans= child->answer;
 475   adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr;
 476   adns_state ads= parent->ads;
 477   adns_status st;
 478   size_t addrsz= gsz_addr(0, parent->answer->type);
 479
 480   st= cans->status;
 481   rrp->astatus= st;
 482   rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs;
 483   rrp->addrs= cans->rrs.addr;
 484   adns__transfer_interim(child, parent, rrp->addrs, rrp->naddrs*addrsz);
 485
 486   if (parent->children.head) {
 487     LIST_LINK_TAIL(ads->childw,parent);
 488   } else {
 489     adns__query_done(parent);
 490   }
 491 }
 492
 493 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
 494                                 int max, adns_rr_hostaddr *rrp) {
 495   adns_status st;
 496   int dmstart, cbyte;
 497   qcontext ctx;
 498   int id;
 499   adns_query nqu;
 500   adns_queryflags nflags;
 501   size_t addrsz= gsz_addr(0, pai->qu->answer->type);
 502
 503   dmstart= cbyte= *cbyte_io;
 504   st= pap_domain(pai, &cbyte, max, &rrp->host,
 505                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 506   if (st) return st;
 507   *cbyte_io= cbyte;
 508
 509   rrp->astatus= adns_s_ok;
 510   rrp->naddrs= -1;
 511   rrp->addrs= 0;
 512
 513   cbyte= pai->nsstart;
 514
 515   st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->nscount, dmstart);
 516   if (st) return st;
 517   if (rrp->naddrs != -1) return adns_s_ok;
 518
 519   st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->arcount, dmstart);
 520   if (st) return st;
 521   if (rrp->naddrs != -1) return adns_s_ok;
 522
 523   st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
 524                             pai->dgram, pai->dglen, dmstart,
 525                             adns_r_addr, adns_qf_quoteok_query);
 526   if (st) return st;
 527
 528   ctx.ext= 0;
 529   ctx.callback= icb_hostaddr;
 530   ctx.pinfo.hostaddr= rrp;
 531   memset(&ctx.tinfo, 0, sizeof(ctx.tinfo));
 532
 533   nflags= adns_qf_quoteok_query;
 534   if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
 535
 536   st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
 537                             ((adns_r_addr & adns_rrt_reprmask) |
 538                              (pai->qu->answer->type & ~adns_rrt_reprmask)),
 539                             &pai->qu->vb, id, nflags, pai->now, &ctx);
 540   if (st) return st;
 541
 542   nqu->parent= pai->qu;
 543   LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
 544
 545   return adns_s_ok;
 546 }
 547
 548 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte,
 549                                int max, void *datap) {
 550   adns_rr_hostaddr *rrp= datap;
 551   adns_status st;
 552
 553   st= pap_hostaddr(pai, &cbyte, max, rrp);
 554   if (st) return st;
 555   if (cbyte != max) return adns_s_invaliddata;
 556
 557   return adns_s_ok;
 558 }
 559
 560 static int dip_hostaddr(adns_state ads,
 561                         const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
 562   if (ap->astatus != bp->astatus) return ap->astatus;
 563   if (ap->astatus) return 0;
 564
 565   return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa);
 566 }
 567
 568 static int di_hostaddr(adns_state ads,
 569                        const void *datap_a, const void *datap_b) {
 570   const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
 571
 572   return dip_hostaddr(ads, ap,bp);
 573 }
 574
 575 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
 576   void *tablev;
 577   size_t addrsz= gsz_addr(0, qu->answer->type);
 578
 579   adns__makefinal_str(qu,&rrp->host);
 580   tablev= rrp->addrs;
 581   adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz);
 582   rrp->addrs= tablev;
 583 }
 584
 585 static void mf_hostaddr(adns_query qu, void *datap) {
 586   adns_rr_hostaddr *rrp= datap;
 587
 588   mfp_hostaddr(qu,rrp);
 589 }
 590
 591 static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
 592   const char *errstr;
 593   adns_status st;
 594   char buf[20];
 595   int i;
 596
 597   st= csp_domain(vb,rrp->host);  if (st) return st;
 598
 599   CSP_ADDSTR(" ");
 600   CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus));
 601
 602   sprintf(buf," %d ",rrp->astatus);
 603   CSP_ADDSTR(buf);
 604
 605   CSP_ADDSTR(adns_errabbrev(rrp->astatus));
 606   CSP_ADDSTR(" ");
 607
 608   errstr= adns_strerror(rrp->astatus);
 609   st= csp_qstring(vb,errstr,strlen(errstr));  if (st) return st;
 610
 611   if (rrp->naddrs >= 0) {
 612     CSP_ADDSTR(" (");
 613     for (i=0; i<rrp->naddrs; i++) {
 614       CSP_ADDSTR(" ");
 615       st= csp_addr(vb,&rrp->addrs[i]);
 616     }
 617     CSP_ADDSTR(" )");
 618   } else {
 619     CSP_ADDSTR(" ?");
 620   }
 621   return adns_s_ok;
 622 }
 623
 624 static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
 625   const adns_rr_hostaddr *rrp= datap;
 626
 627   return csp_hostaddr(vb,rrp);
 628 }
 629
 630 /*
 631  * _mx_raw   (pa,di)
 632  */
 633
 634 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte,
 635                              int max, void *datap) {
 636   const byte *dgram= pai->dgram;
 637   adns_rr_intstr *rrp= datap;
 638   adns_status st;
 639   int pref;
 640
 641   if (cbyte+2 > max) return adns_s_invaliddata;
 642   GET_W(cbyte,pref);
 643   rrp->i= pref;
 644   st= pap_domain(pai, &cbyte, max, &rrp->str,
 645                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 646   if (st) return st;
 647
 648   if (cbyte != max) return adns_s_invaliddata;
 649   return adns_s_ok;
 650 }
 651
 652 static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
 653   const adns_rr_intstr *ap= datap_a, *bp= datap_b;
 654
 655   if (ap->i < bp->i) return 0;
 656   if (ap->i > bp->i) return 1;
 657   return 0;
 658 }
 659
 660 /*
 661  * _mx   (pa,di)
 662  */
 663
 664 static adns_status pa_mx(const parseinfo *pai, int cbyte,
 665                          int max, void *datap) {
 666   const byte *dgram= pai->dgram;
 667   adns_rr_inthostaddr *rrp= datap;
 668   adns_status st;
 669   int pref;
 670
 671   if (cbyte+2 > max) return adns_s_invaliddata;
 672   GET_W(cbyte,pref);
 673   rrp->i= pref;
 674   st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
 675   if (st) return st;
 676
 677   if (cbyte != max) return adns_s_invaliddata;
 678   return adns_s_ok;
 679 }
 680
 681 static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
 682   const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
 683
 684   if (ap->i < bp->i) return 0;
 685   if (ap->i > bp->i) return 1;
 686   return dip_hostaddr(ads, &ap->ha, &bp->ha);
 687 }
 688
 689 /*
 690  * _inthostaddr  (mf,cs)
 691  */
 692
 693 static void mf_inthostaddr(adns_query qu, void *datap) {
 694   adns_rr_inthostaddr *rrp= datap;
 695
 696   mfp_hostaddr(qu,&rrp->ha);
 697 }
 698
 699 static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
 700   const adns_rr_inthostaddr *rrp= datap;
 701   char buf[10];
 702
 703   sprintf(buf,"%u ",rrp->i);
 704   CSP_ADDSTR(buf);
 705
 706   return csp_hostaddr(vb,&rrp->ha);
 707 }
 708
 709 /*
 710  * _inthost  (cs)
 711  */
 712
 713 static adns_status cs_inthost(vbuf *vb, const void *datap) {
 714   const adns_rr_intstr *rrp= datap;
 715   char buf[10];
 716
 717   sprintf(buf,"%u ",rrp->i);
 718   CSP_ADDSTR(buf);
 719   return csp_domain(vb,rrp->str);
 720 }
 721
 722 /*
 723  * _ptr   (ckl,pa +icb_ptr)
 724  */
 725
 726 static adns_status ckl_ptr(adns_state ads, adns_queryflags flags,
 727                            union checklabel_state *cls, qcontext *ctx,
 728                            int labnum, const char *label, int lablen) {
 729   static const char *const (expectdomain[])= { DNS_INADDR_ARPA };
 730   char *ep;
 731   const char *ed;
 732   char labbuf[4];
 733   int l;
 734
 735   if (labnum < 4) {
 736     if (lablen<=0 || lablen>3) return adns_s_querydomainwrong;
 737     memcpy(labbuf, label, lablen);
 738     labbuf[lablen]= 0;
 739     cls->ptr.ipv[3-labnum]= strtoul(labbuf,&ep,10);
 740     if (*ep) return adns_s_querydomainwrong;
 741     if (lablen>1 && *label=='0') return adns_s_querydomainwrong;
 742   } else if (labnum < 4 + sizeof(expectdomain)/sizeof(*expectdomain)) {
 743     ed= expectdomain[labnum-4];
 744     l= strlen(ed);
 745     if (lablen != l || memcmp(label, ed, l)) return adns_s_querydomainwrong;
 746   } else {
 747     if (lablen) return adns_s_querydomainwrong;
 748     ctx->tinfo.ptr.addr.af= AF_INET;
 749     ctx->tinfo.ptr.addr.addr.v4.s_addr=
 750       htonl((cls->ptr.ipv[0]<<24) | (cls->ptr.ipv[1]<<16) |
 751             (cls->ptr.ipv[2]<< 8) | (cls->ptr.ipv[3]));
 752   }
 753   return adns_s_ok;
 754 }
 755
 756 static void icb_ptr(adns_query parent, adns_query child) {
 757   adns_answer *cans= child->answer;
 758   const struct af_addr *queried;
 759   const unsigned char *found;
 760   adns_state ads= parent->ads;
 761   int i;
 762
 763   if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
 764     adns__query_fail(parent,adns_s_inconsistent);
 765     return;
 766   } else if (cans->status) {
 767     adns__query_fail(parent,cans->status);
 768     return;
 769   }
 770
 771   queried= &parent->ctx.tinfo.ptr.addr;
 772   assert(cans->type == adns_r_a);
 773   for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) {
 774     if (adns__genaddr_equal_p(queried->af,&queried->addr, AF_INET,found)) {
 775       if (!parent->children.head) {
 776         adns__query_done(parent);
 777         return;
 778       } else {
 779         LIST_LINK_TAIL(ads->childw,parent);
 780         return;
 781       }
 782     }
 783   }
 784
 785   adns__query_fail(parent,adns_s_inconsistent);
 786 }
 787
 788 static adns_status pa_ptr(const parseinfo *pai, int dmstart,
 789                           int max, void *datap) {
 790   char **rrp= datap;
 791   adns_status st;
 792   int cbyte, id;
 793   adns_query nqu;
 794   qcontext ctx;
 795
 796   cbyte= dmstart;
 797   st= pap_domain(pai, &cbyte, max, rrp,
 798                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 799   if (st) return st;
 800   if (cbyte != max) return adns_s_invaliddata;
 801
 802   st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
 803                             pai->dgram, pai->dglen, dmstart,
 804                             adns_r_a, adns_qf_quoteok_query);
 805   if (st) return st;
 806
 807   ctx.ext= 0;
 808   ctx.callback= icb_ptr;
 809   memset(&ctx.pinfo,0,sizeof(ctx.pinfo));
 810   memset(&ctx.tinfo,0,sizeof(ctx.tinfo));
 811   st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_a),
 812                             adns_r_a, &pai->qu->vb, id, adns_qf_quoteok_query,
 813                             pai->now, &ctx);
 814   if (st) return st;
 815
 816   nqu->parent= pai->qu;
 817   LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
 818   return adns_s_ok;
 819 }
 820
 821 /*
 822  * _strpair   (mf)
 823  */
 824
 825 static void mf_strpair(adns_query qu, void *datap) {
 826   adns_rr_strpair *rrp= datap;
 827
 828   adns__makefinal_str(qu,&rrp->array[0]);
 829   adns__makefinal_str(qu,&rrp->array[1]);
 830 }
 831
 832 /*
 833  * _intstrpair   (mf)
 834  */
 835
 836 static void mf_intstrpair(adns_query qu, void *datap) {
 837   adns_rr_intstrpair *rrp= datap;
 838
 839   adns__makefinal_str(qu,&rrp->array[0].str);
 840   adns__makefinal_str(qu,&rrp->array[1].str);
 841 }
 842
 843 /*
 844  * _hinfo   (pa)
 845  */
 846
 847 static adns_status pa_hinfo(const parseinfo *pai, int cbyte,
 848                             int max, void *datap) {
 849   adns_rr_intstrpair *rrp= datap;
 850   adns_status st;
 851   int i;
 852
 853   for (i=0; i<2; i++) {
 854     st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
 855     if (st) return st;
 856   }
 857
 858   if (cbyte != max) return adns_s_invaliddata;
 859
 860   return adns_s_ok;
 861 }
 862
 863 /*
 864  * _mailbox   (pap,cs +pap_mailbox822)
 865  */
 866
 867 static adns_status pap_mailbox822(const parseinfo *pai,
 868                                   int *cbyte_io, int max, char **mb_r) {
 869   int lablen, labstart, i, needquote, c, r, neednorm;
 870   const unsigned char *p;
 871   char *str;
 872   findlabel_state fls;
 873   adns_status st;
 874   vbuf *vb;
 875
 876   vb= &pai->qu->vb;
 877   vb->used= 0;
 878   adns__findlabel_start(&fls, pai->ads,
 879                         -1, pai->qu,
 880                         pai->dgram, pai->dglen, max,
 881                         *cbyte_io, cbyte_io);
 882   st= adns__findlabel_next(&fls,&lablen,&labstart);
 883   if (!lablen) {
 884     adns__vbuf_appendstr(vb,".");
 885     goto x_ok;
 886   }
 887
 888   neednorm= 1;
 889   for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
 890     c= *p++;
 891     if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
 892     if (c == '.' && !neednorm) neednorm= 1;
 893     else if (c==' ' || c>=127 || ctype_822special(c)) needquote++;
 894     else neednorm= 0;
 895   }
 896
 897   if (needquote || neednorm) {
 898     r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
 899     adns__vbuf_appendq(vb,"\"",1);
 900     for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
 901       c= *p;
 902       if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1);
 903       adns__vbuf_appendq(vb,p,1);
 904     }
 905     adns__vbuf_appendq(vb,"\"",1);
 906   } else {
 907     r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
 908   }
 909
 910   r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
 911
 912   st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
 913   if (st) return st;
 914
 915  x_ok:
 916   str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
 917   memcpy(str,vb->buf,vb->used);
 918   str[vb->used]= 0;
 919   *mb_r= str;
 920   return adns_s_ok;
 921 }
 922
 923 static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
 924                                char **mb_r) {
 925   if (pai->qu->typei->typekey & adns__qtf_mail822) {
 926     return pap_mailbox822(pai, cbyte_io, max, mb_r);
 927   } else {
 928     return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok);
 929   }
 930 }
 931
 932 static adns_status csp_mailbox(vbuf *vb, const char *mailbox) {
 933   return csp_domain(vb,mailbox);
 934 }
 935
 936 /*
 937  * _rp   (pa,cs)
 938  */
 939
 940 static adns_status pa_rp(const parseinfo *pai, int cbyte,
 941                          int max, void *datap) {
 942   adns_rr_strpair *rrp= datap;
 943   adns_status st;
 944
 945   st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
 946   if (st) return st;
 947
 948   st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
 949   if (st) return st;
 950
 951   if (cbyte != max) return adns_s_invaliddata;
 952   return adns_s_ok;
 953 }
 954
 955 static adns_status cs_rp(vbuf *vb, const void *datap) {
 956   const adns_rr_strpair *rrp= datap;
 957   adns_status st;
 958
 959   st= csp_mailbox(vb,rrp->array[0]);  if (st) return st;
 960   CSP_ADDSTR(" ");
 961   st= csp_domain(vb,rrp->array[1]);  if (st) return st;
 962
 963   return adns_s_ok;
 964 }
 965
 966 /*
 967  * _soa   (pa,mf,cs)
 968  */
 969
 970 static adns_status pa_soa(const parseinfo *pai, int cbyte,
 971                           int max, void *datap) {
 972   adns_rr_soa *rrp= datap;
 973   const byte *dgram= pai->dgram;
 974   adns_status st;
 975   int msw, lsw, i;
 976
 977   st= pap_domain(pai, &cbyte, max, &rrp->mname,
 978                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 979   if (st) return st;
 980
 981   st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
 982   if (st) return st;
 983
 984   if (cbyte+20 != max) return adns_s_invaliddata;
 985
 986   for (i=0; i<5; i++) {
 987     GET_W(cbyte,msw);
 988     GET_W(cbyte,lsw);
 989     (&rrp->serial)[i]= (msw<<16) | lsw;
 990   }
 991
 992   return adns_s_ok;
 993 }
 994
 995 static void mf_soa(adns_query qu, void *datap) {
 996   adns_rr_soa *rrp= datap;
 997
 998   adns__makefinal_str(qu,&rrp->mname);
 999   adns__makefinal_str(qu,&rrp->rname);
1000 }
1001
1002 static adns_status cs_soa(vbuf *vb, const void *datap) {
1003   const adns_rr_soa *rrp= datap;
1004   char buf[20];
1005   int i;
1006   adns_status st;
1007
1008   st= csp_domain(vb,rrp->mname);  if (st) return st;
1009   CSP_ADDSTR(" ");
1010   st= csp_mailbox(vb,rrp->rname);  if (st) return st;
1011
1012   for (i=0; i<5; i++) {
1013     sprintf(buf," %lu",(&rrp->serial)[i]);
1014     CSP_ADDSTR(buf);
1015   }
1016
1017   return adns_s_ok;
1018 }
1019
1020 /*
1021  * _srv*  (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
1022  */
1023
1024 static adns_status ckl_srv(adns_state ads, adns_queryflags flags,
1025                            union checklabel_state *cls, qcontext *ctx,
1026                            int labnum, const char *label, int lablen) {
1027   if (labnum < 2 && !(flags & adns_qf_quoteok_query)) {
1028     if (!lablen || label[0] != '_') return adns_s_querydomaininvalid;
1029     return adns_s_ok;
1030   }
1031   return adns__ckl_hostname(ads, flags, cls, ctx, labnum, label, lablen);
1032 }
1033
1034 static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max,
1035                                  adns_rr_srvha *rrp
1036                                    /* might be adns_rr_srvraw* */) {
1037   const byte *dgram= pai->dgram;
1038   int ti, cbyte;
1039
1040   cbyte= *cbyte_io;
1041   if ((*cbyte_io += 6) > max) return adns_s_invaliddata;
1042
1043   rrp->priority= GET_W(cbyte, ti);
1044   rrp->weight=   GET_W(cbyte, ti);
1045   rrp->port=     GET_W(cbyte, ti);
1046   return adns_s_ok;
1047 }
1048
1049 static adns_status pa_srvraw(const parseinfo *pai, int cbyte,
1050                              int max, void *datap) {
1051   adns_rr_srvraw *rrp= datap;
1052   adns_status st;
1053
1054   st= pap_srv_begin(pai,&cbyte,max,datap);
1055   if (st) return st;
1056
1057   st= pap_domain(pai, &cbyte, max, &rrp->host,
1058                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1059   if (st) return st;
1060
1061   if (cbyte != max) return adns_s_invaliddata;
1062   return adns_s_ok;
1063 }
1064
1065 static adns_status pa_srvha(const parseinfo *pai, int cbyte,
1066                             int max, void *datap) {
1067   adns_rr_srvha *rrp= datap;
1068   adns_status st;
1069
1070   st= pap_srv_begin(pai,&cbyte,max,datap);       if (st) return st;
1071   st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);  if (st) return st;
1072   if (cbyte != max) return adns_s_invaliddata;
1073   return adns_s_ok;
1074 }
1075
1076 static void mf_srvraw(adns_query qu, void *datap) {
1077   adns_rr_srvraw *rrp= datap;
1078   adns__makefinal_str(qu, &rrp->host);
1079 }
1080
1081 static void mf_srvha(adns_query qu, void *datap) {
1082   adns_rr_srvha *rrp= datap;
1083   mfp_hostaddr(qu,&rrp->ha);
1084 }
1085
1086 static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) {
1087   const adns_rr_srvraw *ap= datap_a, *bp= datap_b;
1088     /* might be const adns_rr_svhostaddr* */
1089
1090   if (ap->priority < bp->priority) return 0;
1091   if (ap->priority > bp->priority) return 1;
1092   return 0;
1093 }
1094
1095 static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp
1096                                    /* might be adns_rr_srvraw* */) {
1097   char buf[30];
1098   sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port);
1099   CSP_ADDSTR(buf);
1100   return adns_s_ok;
1101 }
1102
1103 static adns_status cs_srvraw(vbuf *vb, const void *datap) {
1104   const adns_rr_srvraw *rrp= datap;
1105   adns_status st;
1106
1107   st= csp_srv_begin(vb,(const void*)rrp);  if (st) return st;
1108   return csp_domain(vb,rrp->host);
1109 }
1110
1111 static adns_status cs_srvha(vbuf *vb, const void *datap) {
1112   const adns_rr_srvha *rrp= datap;
1113   adns_status st;
1114
1115   st= csp_srv_begin(vb,(const void*)datap);  if (st) return st;
1116   return csp_hostaddr(vb,&rrp->ha);
1117 }
1118
1119 static void postsort_srv(adns_state ads, void *array, int nrrs,int rrsz,
1120                          const struct typeinfo *typei) {
1121   /* we treat everything in the array as if it were an adns_rr_srvha
1122    * even though the array might be of adns_rr_srvraw.  That's OK
1123    * because they have the same prefix, which is all we access.
1124    * We use rrsz, too, rather than naive array indexing, of course.
1125    */
1126   char *workbegin, *workend, *search, *arrayend;
1127   const adns_rr_srvha *rr;
1128   union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp;
1129   int cpriority, totalweight, runtotal;
1130   long randval;
1131
1132   assert(rrsz <= sizeof(rrtmp));
1133   for (workbegin= array, arrayend= workbegin + rrsz * nrrs;
1134        workbegin < arrayend;
1135        workbegin= workend) {
1136     cpriority= (rr=(void*)workbegin)->priority;
1137
1138     for (workend= workbegin, totalweight= 0;
1139          workend < arrayend && (rr=(void*)workend)->priority == cpriority;
1140          workend += rrsz) {
1141       totalweight += rr->weight;
1142     }
1143
1144     /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1145      * cpriority.  From now on, workbegin points to the `remaining'
1146      * records: we select one record at a time (RFC2782 `Usage rules'
1147      * and `Format of the SRV RR' subsection `Weight') to place at
1148      * workbegin (swapping with the one that was there, and then
1149      * advance workbegin. */
1150     for (;
1151          workbegin + rrsz < workend; /* don't bother if just one */
1152          workbegin += rrsz) {
1153
1154       randval= nrand48(ads->rand48xsubi);
1155       randval %= (totalweight + 1);
1156         /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1157          * totalweight must be <= 2^26 so probability nonuniformity is
1158          * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1159          *  abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1160          */
1161
1162       for (search=workbegin, runtotal=0;
1163            (runtotal += (rr=(void*)search)->weight) < randval;
1164            search += rrsz);
1165       assert(search < arrayend);
1166       totalweight -= rr->weight;
1167       if (search != workbegin) {
1168         memcpy(&rrtmp, workbegin, rrsz);
1169         memcpy(workbegin, search, rrsz);
1170         memcpy(search, &rrtmp, rrsz);
1171       }
1172     }
1173   }
1174   /* tests:
1175    *  dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1176    *   ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1177    *   ./adnshost_s -t srv- _jabber._tcp.jabber.org
1178    */
1179 }
1180
1181 /*
1182  * _byteblock   (mf)
1183  */
1184
1185 static void mf_byteblock(adns_query qu, void *datap) {
1186   adns_rr_byteblock *rrp= datap;
1187   void *bytes= rrp->data;
1188   adns__makefinal_block(qu,&bytes,rrp->len);
1189   rrp->data= bytes;
1190 }
1191
1192 /*
1193  * _opaque   (pa,cs)
1194  */
1195
1196 static adns_status pa_opaque(const parseinfo *pai, int cbyte,
1197                              int max, void *datap) {
1198   adns_rr_byteblock *rrp= datap;
1199
1200   rrp->len= max - cbyte;
1201   rrp->data= adns__alloc_interim(pai->qu, rrp->len);
1202   if (!rrp->data) R_NOMEM;
1203   memcpy(rrp->data, pai->dgram + cbyte, rrp->len);
1204   return adns_s_ok;
1205 }
1206
1207 static adns_status cs_opaque(vbuf *vb, const void *datap) {
1208   const adns_rr_byteblock *rrp= datap;
1209   char buf[10];
1210   int l;
1211   unsigned char *p;
1212
1213   sprintf(buf,"\\# %d",rrp->len);
1214   CSP_ADDSTR(buf);
1215
1216   for (l= rrp->len, p= rrp->data;
1217        l>=4;
1218        l -= 4, p += 4) {
1219     sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]);
1220     CSP_ADDSTR(buf);
1221   }
1222   for (;
1223        l>0;
1224        l--, p++) {
1225     sprintf(buf," %02x",*p);
1226     CSP_ADDSTR(buf);
1227   }
1228   return adns_s_ok;
1229 }
1230
1231 /*
1232  * _flat   (mf)
1233  */
1234
1235 static void mf_flat(adns_query qu, void *data) { }
1236
1237 /*
1238  * Now the table.
1239  */
1240
1241 #define TYPESZ_M(member)           (sizeof(*((adns_answer*)0)->rrs.member))
1242
1243 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...)     \
1244  { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb,  \
1245      GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer,             \
1246      adns__ckl_hostname, 0, adns__getrrsz_default, CDR(__VA_ARGS__) }
1247 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...)     \
1248  { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat,    \
1249      GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer,             \
1250      adns__ckl_hostname, 0, adns__getrrsz_default, CDR(__VA_ARGS__) }
1251
1252 #define di_0 0
1253
1254 static const typeinfo typeinfos[] = {
1255 /* Must be in ascending order of rrtype ! */
1256 /* mem-mgmt code  rrt     fmt   member   parser      comparer  printer */
1257
1258 FLAT_TYPE(a,      "A",     0,   inaddr,    inaddr,  inaddr,inaddr          ),
1259 DEEP_TYPE(ns_raw, "NS",   "raw",str,       host_raw,0,     domain          ),
1260 DEEP_TYPE(cname,  "CNAME", 0,   str,       dom_raw, 0,     domain          ),
1261 DEEP_TYPE(soa_raw,"SOA",  "raw",soa,       soa,     0,     soa             ),
1262 DEEP_TYPE(ptr_raw,"PTR",  "raw",str,       host_raw,0,     domain          ),
1263 DEEP_TYPE(hinfo,  "HINFO", 0,   intstrpair,hinfo,   0,     hinfo           ),
1264 DEEP_TYPE(mx_raw, "MX",   "raw",intstr,    mx_raw,  mx_raw,inthost         ),
1265 DEEP_TYPE(txt,    "TXT",   0,   manyistr,  txt,     0,     txt             ),
1266 DEEP_TYPE(rp_raw, "RP",   "raw",strpair,   rp,      0,     rp              ),
1267 DEEP_TYPE(srv_raw,"SRV",  "raw",srvraw ,   srvraw,  srv,   srvraw,
1268                               .checklabel= ckl_srv, .postsort= postsort_srv),
1269
1270 FLAT_TYPE(addr,   "A",  "addr", addr,      addr,    addr,  addr,
1271                                                          .getrrsz= gsz_addr),
1272 DEEP_TYPE(ns,     "NS", "+addr",hostaddr,  hostaddr,hostaddr,hostaddr      ),
1273 DEEP_TYPE(ptr,    "PTR","checked",str,     ptr,     0,     domain,
1274                                                        .checklabel= ckl_ptr),
1275 DEEP_TYPE(mx,     "MX", "+addr",inthostaddr,mx,     mx,    inthostaddr,    ),
1276 DEEP_TYPE(srv,    "SRV","+addr",srvha,     srvha,   srv,   srvha,
1277                               .checklabel= ckl_srv, .postsort= postsort_srv),
1278
1279 DEEP_TYPE(soa,    "SOA","822",  soa,       soa,     0,     soa             ),
1280 DEEP_TYPE(rp,     "RP", "822",  strpair,   rp,      0,     rp              ),
1281 };
1282
1283 static const typeinfo typeinfo_unknown=
1284 DEEP_TYPE(unknown,0, "unknown",byteblock,opaque,  0,     opaque            );
1285
1286 const typeinfo *adns__findtype(adns_rrtype type) {
1287   const typeinfo *begin, *end, *mid;
1288
1289   if (type & adns_r_unknown) return &typeinfo_unknown;
1290   type &= adns_rrt_reprmask;
1291
1292   begin= typeinfos;  end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
1293
1294   while (begin < end) {
1295     mid= begin + ((end-begin)>>1);
1296     if (mid->typekey == type) return mid;
1297     if (type > mid->typekey) begin= mid+1;
1298     else end= mid;
1299   }
1300   return 0;
1301 }