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
   7  *    Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
   8  *
   9  *  It is part of adns, which is
  10  *    Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
  11  *    Copyright (C) 1999-2000 Tony Finch <dot@dotat.at>
  12  *
  13  *  This program is free software; you can redistribute it and/or modify
  14  *  it under the terms of the GNU General Public License as published by
  15  *  the Free Software Foundation; either version 2, or (at your option)
  16  *  any later version.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software Foundation,
  25  *  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  */
  27
  28 #include <stdlib.h>
  29
  30 #include <sys/types.h>
  31 #include <sys/socket.h>
  32 #include <netinet/in.h>
  33 #include <arpa/inet.h>
  34
  35 #include "internal.h"
  36
  37 #define R_NOMEM       return adns_s_nomemory
  38 #define CSP_ADDSTR(s) do {                      \
  39     if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \
  40   } while (0)
  41
  42 /*
  43  * order of sections:
  44  *
  45  * _string                    (pap)
  46  * _textdata, _qstring        (csp)
  47  * _str                       (mf,cs)
  48  * _intstr                    (mf,csp,cs)
  49  * _manyistr                  (mf,cs)
  50  * _txt                       (pa)
  51  * _inaddr                    (pa,dip,di)
  52  * _addr                      (pa,di,csp,cs)
  53  * _domain                    (pap)
  54  * _host_raw                  (pa)
  55  * _hostaddr                  (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
  56  * _mx_raw                    (pa,di)
  57  * _mx                        (pa,di)
  58  * _inthostaddr               (mf,cs)
  59  * _ptr                       (pa)
  60  * _strpair                   (mf,cs)
  61  * _intstrpair                (mf,cs)
  62  * _hinfo                     (pa)
  63  * _mailbox                   (pap +pap_mailbox822)
  64  * _rp                        (pa)
  65  * _soa                       (pa,mf,cs)
  66  * _srv*                      (qdpl,(pap),pa,mf,di,(csp),cs,postsort)
  67  * _byteblock                 (mf)
  68  * _opaque                    (pa,cs)
  69  * _flat                      (mf)
  70  *
  71  * within each section:
  72  *    qdpl_*
  73  *    pap_*
  74  *    pa_*
  75  *    dip_*
  76  *    di_*
  77  *    mfp_*
  78  *    mf_*
  79  *    csp_*
  80  *    cs_*
  81  *    postsort_*
  82  */
  83
  84 /*
  85  * _qstring               (pap,csp)
  86  */
  87
  88 static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max,
  89                               int *len_r, char **str_r) {
  90   /* Neither len_r nor str_r may be null.
  91    * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
  92    */
  93   const byte *dgram= pai->dgram;
  94   int l, cbyte;
  95   char *str;
  96
  97   cbyte= *cbyte_io;
  98
  99   if (cbyte >= max) return adns_s_invaliddata;
 100   GET_B(cbyte,l);
 101   if (cbyte+l > max) return adns_s_invaliddata;
 102
 103   str= adns__alloc_interim(pai->qu, l+1);
 104   if (!str) R_NOMEM;
 105
 106   str[l]= 0;
 107   memcpy(str,dgram+cbyte,l);
 108
 109   *len_r= l;
 110   *str_r= str;
 111   *cbyte_io= cbyte+l;
 112
 113   return adns_s_ok;
 114 }
 115
 116 static adns_status csp_qstring(vbuf *vb, const char *dp, int len) {
 117   unsigned char ch;
 118   char buf[10];
 119   int cn;
 120
 121   CSP_ADDSTR("\"");
 122   for (cn=0; cn<len; cn++) {
 123     ch= *dp++;
 124     if (ch == '\\') {
 125       CSP_ADDSTR("\\\\");
 126     } else if (ch == '"') {
 127       CSP_ADDSTR("\\\"");
 128     } else if (ch >= 32 && ch <= 126) {
 129       if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
 130     } else {
 131       sprintf(buf,"\\x%02x",ch);
 132       CSP_ADDSTR(buf);
 133     }
 134   }
 135   CSP_ADDSTR("\"");
 136
 137   return adns_s_ok;
 138 }
 139
 140 /*
 141  * _str  (mf)
 142  */
 143
 144 static void mf_str(adns_query qu, void *datap) {
 145   char **rrp= datap;
 146
 147   adns__makefinal_str(qu,rrp);
 148 }
 149
 150 /*
 151  * _intstr  (mf)
 152  */
 153
 154 static void mf_intstr(adns_query qu, void *datap) {
 155   adns_rr_intstr *rrp= datap;
 156
 157   adns__makefinal_str(qu,&rrp->str);
 158 }
 159
 160 /*
 161  * _manyistr   (mf)
 162  */
 163
 164 static void mf_manyistr(adns_query qu, void *datap) {
 165   adns_rr_intstr **rrp= datap;
 166   adns_rr_intstr *te, *table;
 167   void *tablev;
 168   int tc;
 169
 170   for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
 171   tablev= *rrp;
 172   adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
 173   *rrp= table= tablev;
 174   for (te= *rrp; te->i >= 0; te++)
 175     adns__makefinal_str(qu,&te->str);
 176 }
 177
 178 /*
 179  * _txt   (pa,cs)
 180  */
 181
 182 static adns_status pa_txt(const parseinfo *pai, int cbyte,
 183                           int max, void *datap) {
 184   adns_rr_intstr **rrp= datap, *table, *te;
 185   const byte *dgram= pai->dgram;
 186   int ti, tc, l, startbyte;
 187   adns_status st;
 188
 189   startbyte= cbyte;
 190   if (cbyte >= max) return adns_s_invaliddata;
 191   tc= 0;
 192   while (cbyte < max) {
 193     GET_B(cbyte,l);
 194     cbyte+= l;
 195     tc++;
 196   }
 197   if (cbyte != max || !tc) return adns_s_invaliddata;
 198
 199   table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
 200   if (!table) R_NOMEM;
 201
 202   for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
 203     st= pap_qstring(pai, &cbyte, max, &te->i, &te->str);
 204     if (st) return st;
 205   }
 206   assert(cbyte == max);
 207
 208   te->i= -1;
 209   te->str= 0;
 210
 211   *rrp= table;
 212   return adns_s_ok;
 213 }
 214
 215 static adns_status cs_txt(vbuf *vb, const void *datap) {
 216   const adns_rr_intstr *const *rrp= datap;
 217   const adns_rr_intstr *current;
 218   adns_status st;
 219   int spc;
 220
 221   for (current= *rrp, spc=0;  current->i >= 0;  current++, spc=1) {
 222     if (spc) CSP_ADDSTR(" ");
 223     st= csp_qstring(vb,current->str,current->i); if (st) return st;
 224   }
 225   return adns_s_ok;
 226 }
 227
 228 /*
 229  * _hinfo   (cs)
 230  */
 231
 232 static adns_status cs_hinfo(vbuf *vb, const void *datap) {
 233   const adns_rr_intstrpair *rrp= datap;
 234   adns_status st;
 235
 236   st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i);  if (st) return st;
 237   CSP_ADDSTR(" ");
 238   st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i);  if (st) return st;
 239   return adns_s_ok;
 240 }
 241
 242 /*
 243  * _inaddr   (pa,dip,di)
 244  */
 245
 246 static adns_status pa_inaddr(const parseinfo *pai, int cbyte,
 247                              int max, void *datap) {
 248   struct in_addr *storeto= datap;
 249
 250   if (max-cbyte != 4) return adns_s_invaliddata;
 251   memcpy(storeto, pai->dgram + cbyte, 4);
 252   return adns_s_ok;
 253 }
 254
 255 static int search_sortlist(adns_state ads, struct in_addr ad) {
 256   const struct sortlist *slp;
 257   int i;
 258
 259   for (i=0, slp=ads->sortlist;
 260        i<ads->nsortlist &&
 261          !((ad.s_addr & slp->mask.s_addr) == slp->base.s_addr);
 262        i++, slp++);
 263   return i;
 264 }
 265
 266 static int dip_inaddr(adns_state ads, struct in_addr a, struct in_addr b) {
 267   int ai, bi;
 268
 269   if (!ads->nsortlist) return 0;
 270
 271   ai= search_sortlist(ads,a);
 272   bi= search_sortlist(ads,b);
 273   return bi<ai;
 274 }
 275
 276 static int di_inaddr(adns_state ads,
 277                      const void *datap_a, const void *datap_b) {
 278   const struct in_addr *ap= datap_a, *bp= datap_b;
 279
 280   return dip_inaddr(ads,*ap,*bp);
 281 }
 282
 283 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
 284   const struct in_addr *rrp= datap, rr= *rrp;
 285   const char *ia;
 286
 287   ia= inet_ntoa(rr); assert(ia);
 288   CSP_ADDSTR(ia);
 289   return adns_s_ok;
 290 }
 291
 292 /*
 293  * _addr   (pa,di,csp,cs)
 294  */
 295
 296 static adns_status pa_addr(const parseinfo *pai, int cbyte,
 297                            int max, void *datap) {
 298   adns_rr_addr *storeto= datap;
 299   const byte *dgram= pai->dgram;
 300
 301   if (max-cbyte != 4) return adns_s_invaliddata;
 302   storeto->len= sizeof(storeto->addr.inet);
 303   memset(&storeto->addr,0,sizeof(storeto->addr.inet));
 304   storeto->addr.inet.sin_family= AF_INET;
 305   memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
 306   return adns_s_ok;
 307 }
 308
 309 static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
 310   const adns_rr_addr *ap= datap_a, *bp= datap_b;
 311
 312   assert(ap->addr.sa.sa_family == AF_INET);
 313   return dip_inaddr(ads, ap->addr.inet.sin_addr, bp->addr.inet.sin_addr);
 314 }
 315
 316 static int div_addr(void *context, const void *datap_a, const void *datap_b) {
 317   const adns_state ads= context;
 318
 319   return di_addr(ads, datap_a, datap_b);
 320 }
 321
 322 static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
 323   const char *ia;
 324   static char buf[30];
 325
 326   switch (rrp->addr.inet.sin_family) {
 327   case AF_INET:
 328     CSP_ADDSTR("INET ");
 329     ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia);
 330     CSP_ADDSTR(ia);
 331     break;
 332   default:
 333     sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
 334     CSP_ADDSTR(buf);
 335     break;
 336   }
 337   return adns_s_ok;
 338 }
 339
 340 static adns_status cs_addr(vbuf *vb, const void *datap) {
 341   const adns_rr_addr *rrp= datap;
 342
 343   return csp_addr(vb,rrp);
 344 }
 345
 346 /*
 347  * _domain      (pap,csp,cs)
 348  * _dom_raw     (pa)
 349  */
 350
 351 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
 352                               char **domain_r, parsedomain_flags flags) {
 353   adns_status st;
 354   char *dm;
 355
 356   st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
 357                          pai->dgram,pai->dglen, cbyte_io, max);
 358   if (st) return st;
 359   if (!pai->qu->vb.used) return adns_s_invaliddata;
 360
 361   dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
 362   if (!dm) R_NOMEM;
 363
 364   dm[pai->qu->vb.used]= 0;
 365   memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
 366
 367   *domain_r= dm;
 368   return adns_s_ok;
 369 }
 370
 371 static adns_status csp_domain(vbuf *vb, const char *domain) {
 372   CSP_ADDSTR(domain);
 373   if (!*domain) CSP_ADDSTR(".");
 374   return adns_s_ok;
 375 }
 376
 377 static adns_status cs_domain(vbuf *vb, const void *datap) {
 378   const char *const *domainp= datap;
 379   return csp_domain(vb,*domainp);
 380 }
 381
 382 static adns_status pa_dom_raw(const parseinfo *pai, int cbyte,
 383                               int max, void *datap) {
 384   char **rrp= datap;
 385   adns_status st;
 386
 387   st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
 388   if (st) return st;
 389
 390   if (cbyte != max) return adns_s_invaliddata;
 391   return adns_s_ok;
 392 }
 393
 394 /*
 395  * _host_raw   (pa)
 396  */
 397
 398 static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
 399                                int max, void *datap) {
 400   char **rrp= datap;
 401   adns_status st;
 402
 403   st= pap_domain(pai, &cbyte, max, rrp,
 404                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 405   if (st) return st;
 406
 407   if (cbyte != max) return adns_s_invaliddata;
 408   return adns_s_ok;
 409 }
 410
 411 /*
 412  * _hostaddr   (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
 413  */
 414
 415 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
 416                                  int *cbyte_io, int count, int dmstart) {
 417   int rri, naddrs;
 418   int type, class, rdlen, rdstart, ownermatched;
 419   unsigned long ttl;
 420   adns_status st;
 421
 422   for (rri=0, naddrs=-1; rri<count; rri++) {
 423     st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram,
 424                             pai->dglen, cbyte_io,
 425                             &type, &class, &ttl, &rdlen, &rdstart,
 426                             pai->dgram, pai->dglen, dmstart, &ownermatched);
 427     if (st) return st;
 428     if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) {
 429       if (naddrs>0) break; else continue;
 430     }
 431     if (naddrs == -1) {
 432       naddrs= 0;
 433     }
 434     if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_rr_addr)))
 435       R_NOMEM;
 436     adns__update_expires(pai->qu,ttl,pai->now);
 437     st= pa_addr(pai, rdstart,rdstart+rdlen,
 438                 pai->qu->vb.buf + naddrs*sizeof(adns_rr_addr));
 439     if (st) return st;
 440     naddrs++;
 441   }
 442   if (naddrs >= 0) {
 443     ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_rr_addr));
 444     if (!ha->addrs) R_NOMEM;
 445     memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_rr_addr));
 446     ha->naddrs= naddrs;
 447     ha->astatus= adns_s_ok;
 448
 449     adns__isort(ha->addrs, naddrs, sizeof(adns_rr_addr), pai->qu->vb.buf,
 450                 div_addr, pai->ads);
 451   }
 452   return adns_s_ok;
 453 }
 454
 455 static void icb_hostaddr(adns_query parent, adns_query child) {
 456   adns_answer *cans= child->answer;
 457   adns_rr_hostaddr *rrp= child->ctx.info.hostaddr;
 458   adns_state ads= parent->ads;
 459   adns_status st;
 460
 461   st= cans->status;
 462   rrp->astatus= st;
 463   rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs;
 464   rrp->addrs= cans->rrs.addr;
 465   adns__transfer_interim(child, parent, rrp->addrs,
 466                          rrp->naddrs*sizeof(adns_rr_addr));
 467
 468   if (parent->children.head) {
 469     LIST_LINK_TAIL(ads->childw,parent);
 470   } else {
 471     adns__query_done(parent);
 472   }
 473 }
 474
 475 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
 476                                 int max, adns_rr_hostaddr *rrp) {
 477   adns_status st;
 478   int dmstart, cbyte;
 479   qcontext ctx;
 480   int id;
 481   adns_query nqu;
 482   adns_queryflags nflags;
 483
 484   dmstart= cbyte= *cbyte_io;
 485   st= pap_domain(pai, &cbyte, max, &rrp->host,
 486                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 487   if (st) return st;
 488   *cbyte_io= cbyte;
 489
 490   rrp->astatus= adns_s_ok;
 491   rrp->naddrs= -1;
 492   rrp->addrs= 0;
 493
 494   cbyte= pai->nsstart;
 495
 496   st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart);
 497   if (st) return st;
 498   if (rrp->naddrs != -1) return adns_s_ok;
 499
 500   st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart);
 501   if (st) return st;
 502   if (rrp->naddrs != -1) return adns_s_ok;
 503
 504   st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
 505                             pai->dgram, pai->dglen, dmstart,
 506                             adns_r_addr, adns_qf_quoteok_query);
 507   if (st) return st;
 508
 509   ctx.ext= 0;
 510   ctx.callback= icb_hostaddr;
 511   ctx.info.hostaddr= rrp;
 512
 513   nflags= adns_qf_quoteok_query;
 514   if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
 515
 516   st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
 517                             &pai->qu->vb, id, nflags, pai->now, &ctx);
 518   if (st) return st;
 519
 520   nqu->parent= pai->qu;
 521   LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
 522
 523   return adns_s_ok;
 524 }
 525
 526 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte,
 527                                int max, void *datap) {
 528   adns_rr_hostaddr *rrp= datap;
 529   adns_status st;
 530
 531   st= pap_hostaddr(pai, &cbyte, max, rrp);
 532   if (st) return st;
 533   if (cbyte != max) return adns_s_invaliddata;
 534
 535   return adns_s_ok;
 536 }
 537
 538 static int dip_hostaddr(adns_state ads,
 539                         const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
 540   if (ap->astatus != bp->astatus) return ap->astatus;
 541   if (ap->astatus) return 0;
 542
 543   assert(ap->addrs[0].addr.sa.sa_family == AF_INET);
 544   assert(bp->addrs[0].addr.sa.sa_family == AF_INET);
 545   return dip_inaddr(ads,
 546                     ap->addrs[0].addr.inet.sin_addr,
 547                     bp->addrs[0].addr.inet.sin_addr);
 548 }
 549
 550 static int di_hostaddr(adns_state ads,
 551                        const void *datap_a, const void *datap_b) {
 552   const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
 553
 554   return dip_hostaddr(ads, ap,bp);
 555 }
 556
 557 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
 558   void *tablev;
 559
 560   adns__makefinal_str(qu,&rrp->host);
 561   tablev= rrp->addrs;
 562   adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs));
 563   rrp->addrs= tablev;
 564 }
 565
 566 static void mf_hostaddr(adns_query qu, void *datap) {
 567   adns_rr_hostaddr *rrp= datap;
 568
 569   mfp_hostaddr(qu,rrp);
 570 }
 571
 572 static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
 573   const char *errstr;
 574   adns_status st;
 575   char buf[20];
 576   int i;
 577
 578   st= csp_domain(vb,rrp->host);  if (st) return st;
 579
 580   CSP_ADDSTR(" ");
 581   CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus));
 582
 583   sprintf(buf," %d ",rrp->astatus);
 584   CSP_ADDSTR(buf);
 585
 586   CSP_ADDSTR(adns_errabbrev(rrp->astatus));
 587   CSP_ADDSTR(" ");
 588
 589   errstr= adns_strerror(rrp->astatus);
 590   st= csp_qstring(vb,errstr,strlen(errstr));  if (st) return st;
 591
 592   if (rrp->naddrs >= 0) {
 593     CSP_ADDSTR(" (");
 594     for (i=0; i<rrp->naddrs; i++) {
 595       CSP_ADDSTR(" ");
 596       st= csp_addr(vb,&rrp->addrs[i]);
 597     }
 598     CSP_ADDSTR(" )");
 599   } else {
 600     CSP_ADDSTR(" ?");
 601   }
 602   return adns_s_ok;
 603 }
 604
 605 static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
 606   const adns_rr_hostaddr *rrp= datap;
 607
 608   return csp_hostaddr(vb,rrp);
 609 }
 610
 611 /*
 612  * _mx_raw   (pa,di)
 613  */
 614
 615 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte,
 616                              int max, void *datap) {
 617   const byte *dgram= pai->dgram;
 618   adns_rr_intstr *rrp= datap;
 619   adns_status st;
 620   int pref;
 621
 622   if (cbyte+2 > max) return adns_s_invaliddata;
 623   GET_W(cbyte,pref);
 624   rrp->i= pref;
 625   st= pap_domain(pai, &cbyte, max, &rrp->str,
 626                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 627   if (st) return st;
 628
 629   if (cbyte != max) return adns_s_invaliddata;
 630   return adns_s_ok;
 631 }
 632
 633 static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
 634   const adns_rr_intstr *ap= datap_a, *bp= datap_b;
 635
 636   if (ap->i < bp->i) return 0;
 637   if (ap->i > bp->i) return 1;
 638   return 0;
 639 }
 640
 641 /*
 642  * _mx   (pa,di)
 643  */
 644
 645 static adns_status pa_mx(const parseinfo *pai, int cbyte,
 646                          int max, void *datap) {
 647   const byte *dgram= pai->dgram;
 648   adns_rr_inthostaddr *rrp= datap;
 649   adns_status st;
 650   int pref;
 651
 652   if (cbyte+2 > max) return adns_s_invaliddata;
 653   GET_W(cbyte,pref);
 654   rrp->i= pref;
 655   st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
 656   if (st) return st;
 657
 658   if (cbyte != max) return adns_s_invaliddata;
 659   return adns_s_ok;
 660 }
 661
 662 static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
 663   const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
 664
 665   if (ap->i < bp->i) return 0;
 666   if (ap->i > bp->i) return 1;
 667   return dip_hostaddr(ads, &ap->ha, &bp->ha);
 668 }
 669
 670 /*
 671  * _inthostaddr  (mf,cs)
 672  */
 673
 674 static void mf_inthostaddr(adns_query qu, void *datap) {
 675   adns_rr_inthostaddr *rrp= datap;
 676
 677   mfp_hostaddr(qu,&rrp->ha);
 678 }
 679
 680 static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
 681   const adns_rr_inthostaddr *rrp= datap;
 682   char buf[10];
 683
 684   sprintf(buf,"%u ",rrp->i);
 685   CSP_ADDSTR(buf);
 686
 687   return csp_hostaddr(vb,&rrp->ha);
 688 }
 689
 690 /*
 691  * _inthost  (cs)
 692  */
 693
 694 static adns_status cs_inthost(vbuf *vb, const void *datap) {
 695   const adns_rr_intstr *rrp= datap;
 696   char buf[10];
 697
 698   sprintf(buf,"%u ",rrp->i);
 699   CSP_ADDSTR(buf);
 700   return csp_domain(vb,rrp->str);
 701 }
 702
 703 /*
 704  * _ptr   (pa, +icb_ptr)
 705  */
 706
 707 static void icb_ptr(adns_query parent, adns_query child) {
 708   adns_answer *cans= child->answer;
 709   const adns_rr_addr *queried, *found;
 710   adns_state ads= parent->ads;
 711   int i;
 712
 713   if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
 714     adns__query_fail(parent,adns_s_inconsistent);
 715     return;
 716   } else if (cans->status) {
 717     adns__query_fail(parent,cans->status);
 718     return;
 719   }
 720
 721   queried= &parent->ctx.info.ptr_parent_addr;
 722   for (i=0, found=cans->rrs.addr; i<cans->nrrs; i++, found++) {
 723     if (queried->len == found->len &&
 724         !memcmp(&queried->addr,&found->addr,queried->len)) {
 725       if (!parent->children.head) {
 726         adns__query_done(parent);
 727         return;
 728       } else {
 729         LIST_LINK_TAIL(ads->childw,parent);
 730         return;
 731       }
 732     }
 733   }
 734
 735   adns__query_fail(parent,adns_s_inconsistent);
 736 }
 737
 738 static adns_status pa_ptr(const parseinfo *pai, int dmstart,
 739                           int max, void *datap) {
 740   static const char *(expectdomain[])= { DNS_INADDR_ARPA };
 741
 742   char **rrp= datap;
 743   adns_status st;
 744   adns_rr_addr *ap;
 745   findlabel_state fls;
 746   char *ep;
 747   byte ipv[4];
 748   char labbuf[4];
 749   int cbyte, i, lablen, labstart, l, id;
 750   adns_query nqu;
 751   qcontext ctx;
 752
 753   cbyte= dmstart;
 754   st= pap_domain(pai, &cbyte, max, rrp,
 755                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 756   if (st) return st;
 757   if (cbyte != max) return adns_s_invaliddata;
 758
 759   ap= &pai->qu->ctx.info.ptr_parent_addr;
 760   if (!ap->len) {
 761     adns__findlabel_start(&fls, pai->ads, -1, pai->qu,
 762                           pai->qu->query_dgram, pai->qu->query_dglen,
 763                           pai->qu->query_dglen, DNS_HDRSIZE, 0);
 764     for (i=0; i<4; i++) {
 765       st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st);
 766       if (lablen<=0 || lablen>3) return adns_s_querydomainwrong;
 767       memcpy(labbuf, pai->qu->query_dgram + labstart, lablen);
 768       labbuf[lablen]= 0;
 769       ipv[3-i]= strtoul(labbuf,&ep,10);
 770       if (*ep) return adns_s_querydomainwrong;
 771       if (lablen>1 && pai->qu->query_dgram[labstart]=='0')
 772         return adns_s_querydomainwrong;
 773     }
 774     for (i=0; i<sizeof(expectdomain)/sizeof(*expectdomain); i++) {
 775       st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st);
 776       l= strlen(expectdomain[i]);
 777       if (lablen != l ||
 778           memcmp(pai->qu->query_dgram + labstart, expectdomain[i], l))
 779         return adns_s_querydomainwrong;
 780     }
 781     st= adns__findlabel_next(&fls,&lablen,0); assert(!st);
 782     if (lablen) return adns_s_querydomainwrong;
 783
 784     ap->len= sizeof(struct sockaddr_in);
 785     memset(&ap->addr,0,sizeof(ap->addr.inet));
 786     ap->addr.inet.sin_family= AF_INET;
 787     ap->addr.inet.sin_addr.s_addr=
 788       htonl((ipv[0]<<24) | (ipv[1]<<16) | (ipv[2]<<8) | (ipv[3]));
 789   }
 790
 791   st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
 792                             pai->dgram, pai->dglen, dmstart,
 793                             adns_r_addr, adns_qf_quoteok_query);
 794   if (st) return st;
 795
 796   ctx.ext= 0;
 797   ctx.callback= icb_ptr;
 798   memset(&ctx.info,0,sizeof(ctx.info));
 799   st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
 800                             &pai->qu->vb, id,
 801                             adns_qf_quoteok_query, pai->now, &ctx);
 802   if (st) return st;
 803
 804   nqu->parent= pai->qu;
 805   LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
 806   return adns_s_ok;
 807 }
 808
 809 /*
 810  * _strpair   (mf)
 811  */
 812
 813 static void mf_strpair(adns_query qu, void *datap) {
 814   adns_rr_strpair *rrp= datap;
 815
 816   adns__makefinal_str(qu,&rrp->array[0]);
 817   adns__makefinal_str(qu,&rrp->array[1]);
 818 }
 819
 820 /*
 821  * _intstrpair   (mf)
 822  */
 823
 824 static void mf_intstrpair(adns_query qu, void *datap) {
 825   adns_rr_intstrpair *rrp= datap;
 826
 827   adns__makefinal_str(qu,&rrp->array[0].str);
 828   adns__makefinal_str(qu,&rrp->array[1].str);
 829 }
 830
 831 /*
 832  * _hinfo   (pa)
 833  */
 834
 835 static adns_status pa_hinfo(const parseinfo *pai, int cbyte,
 836                             int max, void *datap) {
 837   adns_rr_intstrpair *rrp= datap;
 838   adns_status st;
 839   int i;
 840
 841   for (i=0; i<2; i++) {
 842     st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
 843     if (st) return st;
 844   }
 845
 846   if (cbyte != max) return adns_s_invaliddata;
 847
 848   return adns_s_ok;
 849 }
 850
 851 /*
 852  * _mailbox   (pap,cs)
 853  */
 854
 855 static adns_status pap_mailbox822(const parseinfo *pai,
 856                                   int *cbyte_io, int max, char **mb_r) {
 857   int lablen, labstart, i, needquote, c, r, neednorm;
 858   const unsigned char *p;
 859   char *str;
 860   findlabel_state fls;
 861   adns_status st;
 862   vbuf *vb;
 863
 864   vb= &pai->qu->vb;
 865   vb->used= 0;
 866   adns__findlabel_start(&fls, pai->ads,
 867                         -1, pai->qu,
 868                         pai->dgram, pai->dglen, max,
 869                         *cbyte_io, cbyte_io);
 870   st= adns__findlabel_next(&fls,&lablen,&labstart);
 871   if (!lablen) {
 872     adns__vbuf_appendstr(vb,".");
 873     goto x_ok;
 874   }
 875
 876   neednorm= 1;
 877   for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
 878     c= *p++;
 879     if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
 880     if (c == '.' && !neednorm) neednorm= 1;
 881     else if (c==' ' || c>=127 || ctype_822special(c)) needquote++;
 882     else neednorm= 0;
 883   }
 884
 885   if (needquote || neednorm) {
 886     r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
 887     adns__vbuf_appendq(vb,"\"",1);
 888     for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
 889       c= *p;
 890       if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1);
 891       adns__vbuf_appendq(vb,p,1);
 892     }
 893     adns__vbuf_appendq(vb,"\"",1);
 894   } else {
 895     r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
 896   }
 897
 898   r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
 899
 900   st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
 901   if (st) return st;
 902
 903  x_ok:
 904   str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
 905   memcpy(str,vb->buf,vb->used);
 906   str[vb->used]= 0;
 907   *mb_r= str;
 908   return adns_s_ok;
 909 }
 910
 911 static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
 912                                char **mb_r) {
 913   if (pai->qu->typei->typekey & adns__qtf_mail822) {
 914     return pap_mailbox822(pai, cbyte_io, max, mb_r);
 915   } else {
 916     return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok);
 917   }
 918 }
 919
 920 static adns_status csp_mailbox(vbuf *vb, const char *mailbox) {
 921   return csp_domain(vb,mailbox);
 922 }
 923
 924 /*
 925  * _rp   (pa,cs)
 926  */
 927
 928 static adns_status pa_rp(const parseinfo *pai, int cbyte,
 929                          int max, void *datap) {
 930   adns_rr_strpair *rrp= datap;
 931   adns_status st;
 932
 933   st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
 934   if (st) return st;
 935
 936   st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
 937   if (st) return st;
 938
 939   if (cbyte != max) return adns_s_invaliddata;
 940   return adns_s_ok;
 941 }
 942
 943 static adns_status cs_rp(vbuf *vb, const void *datap) {
 944   const adns_rr_strpair *rrp= datap;
 945   adns_status st;
 946
 947   st= csp_mailbox(vb,rrp->array[0]);  if (st) return st;
 948   CSP_ADDSTR(" ");
 949   st= csp_domain(vb,rrp->array[1]);  if (st) return st;
 950
 951   return adns_s_ok;
 952 }
 953
 954 /*
 955  * _soa   (pa,mf,cs)
 956  */
 957
 958 static adns_status pa_soa(const parseinfo *pai, int cbyte,
 959                           int max, void *datap) {
 960   adns_rr_soa *rrp= datap;
 961   const byte *dgram= pai->dgram;
 962   adns_status st;
 963   int msw, lsw, i;
 964
 965   st= pap_domain(pai, &cbyte, max, &rrp->mname,
 966                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 967   if (st) return st;
 968
 969   st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
 970   if (st) return st;
 971
 972   if (cbyte+20 != max) return adns_s_invaliddata;
 973
 974   for (i=0; i<5; i++) {
 975     GET_W(cbyte,msw);
 976     GET_W(cbyte,lsw);
 977     (&rrp->serial)[i]= (msw<<16) | lsw;
 978   }
 979
 980   return adns_s_ok;
 981 }
 982
 983 static void mf_soa(adns_query qu, void *datap) {
 984   adns_rr_soa *rrp= datap;
 985
 986   adns__makefinal_str(qu,&rrp->mname);
 987   adns__makefinal_str(qu,&rrp->rname);
 988 }
 989
 990 static adns_status cs_soa(vbuf *vb, const void *datap) {
 991   const adns_rr_soa *rrp= datap;
 992   char buf[20];
 993   int i;
 994   adns_status st;
 995
 996   st= csp_domain(vb,rrp->mname);  if (st) return st;
 997   CSP_ADDSTR(" ");
 998   st= csp_mailbox(vb,rrp->rname);  if (st) return st;
 999
1000   for (i=0; i<5; i++) {
1001     sprintf(buf," %lu",(&rrp->serial)[i]);
1002     CSP_ADDSTR(buf);
1003   }
1004
1005   return adns_s_ok;
1006 }
1007
1008 /*
1009  * _srv*  (pa*2,di,cs*2,qdpl,postsort)
1010  */
1011
1012 static adns_status qdpl_srv(adns_state ads,
1013                             const char **p_io, const char *pe, int labelnum,
1014                             char label_r[DNS_MAXDOMAIN], int *ll_io,
1015                             adns_queryflags flags,
1016                             const typeinfo *typei) {
1017   int useflags;
1018   const char *p_orig;
1019   adns_status st;
1020
1021   if (labelnum < 2 && !(flags & adns_qf_quoteok_query)) {
1022     useflags= adns_qf_quoteok_query;
1023     p_orig= *p_io;
1024   } else {
1025     useflags= flags;
1026     p_orig= 0;
1027   }
1028   st= adns__qdpl_normal(ads, p_io,pe, labelnum,label_r, ll_io, useflags,typei);
1029   if (st) return st;
1030
1031   if (p_orig) {
1032     int ll= *ll_io;
1033     if (!ll || label_r[0]!='_')
1034       return adns_s_querydomaininvalid;
1035     if (memchr(p_orig+1, '\\', pe - (p_orig+1)))
1036       return adns_s_querydomaininvalid;
1037   }
1038   return adns_s_ok;
1039 }
1040
1041 static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max,
1042                                  adns_rr_srvha *rrp
1043                                    /* might be adns_rr_srvraw* */) {
1044   const byte *dgram= pai->dgram;
1045   int ti, cbyte;
1046
1047   cbyte= *cbyte_io;
1048   if ((*cbyte_io += 6) > max) return adns_s_invaliddata;
1049
1050   rrp->priority= GET_W(cbyte, ti);
1051   rrp->weight=   GET_W(cbyte, ti);
1052   rrp->port=     GET_W(cbyte, ti);
1053   return adns_s_ok;
1054 }
1055
1056 static adns_status pa_srvraw(const parseinfo *pai, int cbyte,
1057                              int max, void *datap) {
1058   adns_rr_srvraw *rrp= datap;
1059   adns_status st;
1060
1061   st= pap_srv_begin(pai,&cbyte,max,datap);
1062   if (st) return st;
1063
1064   st= pap_domain(pai, &cbyte, max, &rrp->host,
1065                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
1066   if (st) return st;
1067
1068   if (cbyte != max) return adns_s_invaliddata;
1069   return adns_s_ok;
1070 }
1071
1072 static adns_status pa_srvha(const parseinfo *pai, int cbyte,
1073                             int max, void *datap) {
1074   adns_rr_srvha *rrp= datap;
1075   adns_status st;
1076
1077   st= pap_srv_begin(pai,&cbyte,max,datap);       if (st) return st;
1078   st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);  if (st) return st;
1079   if (cbyte != max) return adns_s_invaliddata;
1080   return adns_s_ok;
1081 }
1082
1083 static void mf_srvraw(adns_query qu, void *datap) {
1084   adns_rr_srvraw *rrp= datap;
1085   adns__makefinal_str(qu, &rrp->host);
1086 }
1087
1088 static void mf_srvha(adns_query qu, void *datap) {
1089   adns_rr_srvha *rrp= datap;
1090   mfp_hostaddr(qu,&rrp->ha);
1091 }
1092
1093 static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) {
1094   const adns_rr_srvraw *ap= datap_a, *bp= datap_b;
1095     /* might be const adns_rr_svhostaddr* */
1096
1097   if (ap->priority < bp->priority) return 0;
1098   if (ap->priority > bp->priority) return 1;
1099   return 0;
1100 }
1101
1102 static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp
1103                                    /* might be adns_rr_srvraw* */) {
1104   char buf[30];
1105   sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port);
1106   CSP_ADDSTR(buf);
1107   return adns_s_ok;
1108 }
1109
1110 static adns_status cs_srvraw(vbuf *vb, const void *datap) {
1111   const adns_rr_srvraw *rrp= datap;
1112   adns_status st;
1113
1114   st= csp_srv_begin(vb,(const void*)rrp);  if (st) return st;
1115   return csp_domain(vb,rrp->host);
1116 }
1117
1118 static adns_status cs_srvha(vbuf *vb, const void *datap) {
1119   const adns_rr_srvha *rrp= datap;
1120   adns_status st;
1121
1122   st= csp_srv_begin(vb,(const void*)datap);  if (st) return st;
1123   return csp_hostaddr(vb,&rrp->ha);
1124 }
1125
1126 static void postsort_srv(adns_state ads, void *array, int nrrs,
1127                          const struct typeinfo *typei) {
1128   /* we treat everything in the array as if it were an adns_rr_srvha
1129    * even though the array might be of adns_rr_srvraw.  That's OK
1130    * because they have the same prefix, which is all we access.
1131    * We use typei->rrsz, too, rather than naive array indexing, of course.
1132    */
1133   char *workbegin, *workend, *search, *arrayend;
1134   const adns_rr_srvha *rr;
1135   union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp;
1136   int cpriority, totalweight, runtotal;
1137   long randval;
1138
1139   for (workbegin= array, arrayend= workbegin + typei->rrsz * nrrs;
1140        workbegin < arrayend;
1141        workbegin= workend) {
1142     cpriority= (rr=(void*)workbegin)->priority;
1143
1144     for (workend= workbegin, totalweight= 0;
1145          workend < arrayend && (rr=(void*)workend)->priority == cpriority;
1146          workend += typei->rrsz) {
1147       totalweight += rr->weight;
1148     }
1149
1150     /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
1151      * cpriority.  From now on, workbegin points to the `remaining'
1152      * records: we select one record at a time (RFC2782 `Usage rules'
1153      * and `Format of the SRV RR' subsection `Weight') to place at
1154      * workbegin (swapping with the one that was there, and then
1155      * advance workbegin. */
1156     for (;
1157          workbegin + typei->rrsz < workend; /* don't bother if just one */
1158          workbegin += typei->rrsz) {
1159
1160       randval= nrand48(ads->rand48xsubi);
1161       randval %= (totalweight + 1);
1162         /* makes it into 0..totalweight inclusive; with 2^10 RRs,
1163          * totalweight must be <= 2^26 so probability nonuniformity is
1164          * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
1165          *  abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
1166          */
1167
1168       for (search=workbegin, runtotal=0;
1169            (runtotal += (rr=(void*)search)->weight) < randval;
1170            search += typei->rrsz);
1171       assert(search < arrayend);
1172       totalweight -= rr->weight;
1173       if (search != workbegin) {
1174         memcpy(&rrtmp, workbegin, typei->rrsz);
1175         memcpy(workbegin, search, typei->rrsz);
1176         memcpy(search, &rrtmp, typei->rrsz);
1177       }
1178     }
1179   }
1180   /* tests:
1181    *  dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
1182    *   ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
1183    *   ./adnshost_s -t srv- _jabber._tcp.jabber.org
1184    */
1185 }
1186
1187 /*
1188  * _byteblock   (mf)
1189  */
1190
1191 static void mf_byteblock(adns_query qu, void *datap) {
1192   adns_rr_byteblock *rrp= datap;
1193   void *bytes= rrp->data;
1194   adns__makefinal_block(qu,&bytes,rrp->len);
1195   rrp->data= bytes;
1196 }
1197
1198 /*
1199  * _opaque   (pa,cs)
1200  */
1201
1202 static adns_status pa_opaque(const parseinfo *pai, int cbyte,
1203                              int max, void *datap) {
1204   adns_rr_byteblock *rrp= datap;
1205
1206   rrp->len= max - cbyte;
1207   rrp->data= adns__alloc_interim(pai->qu, rrp->len);
1208   if (!rrp->data) R_NOMEM;
1209   memcpy(rrp->data, pai->dgram + cbyte, rrp->len);
1210   return adns_s_ok;
1211 }
1212
1213 static adns_status cs_opaque(vbuf *vb, const void *datap) {
1214   const adns_rr_byteblock *rrp= datap;
1215   char buf[10];
1216   int l;
1217   unsigned char *p;
1218
1219   sprintf(buf,"\\# %d",rrp->len);
1220   CSP_ADDSTR(buf);
1221
1222   for (l= rrp->len, p= rrp->data;
1223        l>=4;
1224        l -= 4, p += 4) {
1225     sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]);
1226     CSP_ADDSTR(buf);
1227   }
1228   for (;
1229        l>0;
1230        l--, p++) {
1231     sprintf(buf," %02x",*p);
1232     CSP_ADDSTR(buf);
1233   }
1234   return adns_s_ok;
1235 }
1236
1237 /*
1238  * _flat   (mf)
1239  */
1240
1241 static void mf_flat(adns_query qu, void *data) { }
1242
1243 /*
1244  * Now the table.
1245  */
1246
1247 #define TYPESZ_M(member)           (sizeof(*((adns_answer*)0)->rrs.member))
1248
1249 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
1250 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
1251
1252 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer)    \
1253  { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb,            \
1254       printer,parser,comparer, adns__qdpl_normal,0 }
1255 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer)    \
1256  { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_flat,              \
1257      printer,parser,comparer, adns__qdpl_normal,0 }
1258 #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer,qdpl,postsort) \
1259  { adns_r_##code, rrt,fmt,TYPESZ_M(memb), mf_##memb,                       \
1260     printer,parser,comparer,qdpl,postsort }
1261
1262 static const typeinfo typeinfos[] = {
1263 /* Must be in ascending order of rrtype ! */
1264 /* mem-mgmt code  rrt     fmt   member   parser      comparer  printer */
1265
1266 FLAT_TYPE(a,      "A",     0,   inaddr,  pa_inaddr,  di_inaddr,cs_inaddr     ),
1267 DEEP_TYPE(ns_raw, "NS",   "raw",str,     pa_host_raw,0,        cs_domain     ),
1268 DEEP_TYPE(cname,  "CNAME", 0,   str,     pa_dom_raw, 0,        cs_domain     ),
1269 DEEP_TYPE(soa_raw,"SOA",  "raw",soa,     pa_soa,     0,        cs_soa        ),
1270 DEEP_TYPE(ptr_raw,"PTR",  "raw",str,     pa_host_raw,0,        cs_domain     ),
1271 DEEP_TYPE(hinfo,  "HINFO", 0, intstrpair,pa_hinfo,   0,        cs_hinfo      ),
1272 DEEP_TYPE(mx_raw, "MX",   "raw",intstr,  pa_mx_raw,  di_mx_raw,cs_inthost    ),
1273 DEEP_TYPE(txt,    "TXT",   0,   manyistr,pa_txt,     0,        cs_txt        ),
1274 DEEP_TYPE(rp_raw, "RP",   "raw",strpair, pa_rp,      0,        cs_rp         ),
1275 XTRA_TYPE(srv_raw,"SRV",  "raw",srvraw , pa_srvraw,  di_srv,   cs_srvraw,
1276                                                        qdpl_srv, postsort_srv),
1277
1278 FLAT_TYPE(addr,   "A",  "addr", addr,    pa_addr,    di_addr,  cs_addr       ),
1279 DEEP_TYPE(ns,     "NS", "+addr",hostaddr,pa_hostaddr,di_hostaddr,cs_hostaddr ),
1280 DEEP_TYPE(ptr,    "PTR","checked",str,   pa_ptr,     0,        cs_domain     ),
1281 DEEP_TYPE(mx,     "MX", "+addr",inthostaddr,pa_mx,   di_mx,    cs_inthostaddr),
1282 XTRA_TYPE(srv,    "SRV","+addr",srvha,   pa_srvha,   di_srv,   cs_srvha,
1283                                                        qdpl_srv, postsort_srv),
1284
1285 DEEP_TYPE(soa,    "SOA","822",  soa,     pa_soa,     0,        cs_soa        ),
1286 DEEP_TYPE(rp,     "RP", "822",  strpair, pa_rp,      0,        cs_rp         ),
1287 };
1288
1289 static const typeinfo typeinfo_unknown=
1290 DEEP_TYPE(unknown,0, "unknown",byteblock,pa_opaque,  0,        cs_opaque     );
1291
1292 const typeinfo *adns__findtype(adns_rrtype type) {
1293   const typeinfo *begin, *end, *mid;
1294
1295   if (type & adns_r_unknown) return &typeinfo_unknown;
1296
1297   begin= typeinfos;  end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
1298
1299   while (begin < end) {
1300     mid= begin + ((end-begin)>>1);
1301     if (mid->typekey == type) return mid;
1302     if (type > mid->typekey) begin= mid+1;
1303     else end= mid;
1304   }
1305   return 0;
1306 }