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 Copyright (C) 1997-1999 Ian Jackson
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2, or (at your option)
  11  *  any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software Foundation,
  20  *  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21  */
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include <sys/types.h>
  27 #include <sys/socket.h>
  28 #include <netinet/in.h>
  29 #include <arpa/inet.h>
  30
  31 #include "internal.h"
  32
  33 #define R_NOMEM           return adns_s_nomemory
  34 #define CSP_ADDSTR(s)     do { if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; } while (0)
  35
  36 /*
  37  * order of sections:
  38  *
  39  * _string                    (pap)
  40  * _textdata, _qstring        (csp)
  41  * _str                       (mf,cs)
  42  * _intstr                    (mf,csp,cs)
  43  * _manyistr                  (mf,cs)
  44  * _txt                       (pa)
  45  * _inaddr                    (pa,dip,di)
  46  * _addr                      (pa,di,csp,cs)
  47  * _domain                    (pap)
  48  * _host_raw                  (pa)
  49  * _hostaddr                  (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
  50  * _mx_raw                    (pa,di)
  51  * _mx                        (pa,di)
  52  * _inthostaddr               (mf,cs)
  53  * _ptr                       (pa)
  54  * _strpair                   (mf,cs)
  55  * _intstrpair                (mf,cs)
  56  * _hinfo                     (pa)
  57  * _mailbox                   (pap)
  58  * _rp                        (pa)
  59  * _soa                       (pa,mf,cs)
  60  * _flat                      (mf)
  61  *
  62  * within each section:
  63  *    pap_*
  64  *    pa_*
  65  *    dip_*
  66  *    di_*
  67  *    mfp_*
  68  *    mf_*
  69  *    csp_*
  70  *    cs_*
  71  */
  72
  73 /*
  74  * _string               (pap)
  75  * _textdata, _qstring   (csp)
  76  */
  77
  78 static adns_status pap_string(const parseinfo *pai, int *cbyte_io, int max,
  79                               int *len_r, char **str_r) {
  80   /* Neither len_r nor str_r may be null.
  81    * End of datagram (overrun) is indicated by returning adns_s_invaliddata;
  82    */
  83   const byte *dgram= pai->dgram;
  84   int l, cbyte;
  85   char *str;
  86
  87   cbyte= *cbyte_io;
  88
  89   if (cbyte >= max) return adns_s_invaliddata;
  90   GET_B(cbyte,l);
  91   if (cbyte+l > max) return adns_s_invaliddata;
  92
  93   str= adns__alloc_interim(pai->qu, l+1);
  94   if (!str) R_NOMEM;
  95
  96   str[l]= 0;
  97   memcpy(str,dgram+cbyte,l);
  98
  99   *len_r= l;
 100   *str_r= str;
 101   *cbyte_io= cbyte+l;
 102
 103   return adns_s_ok;
 104 }
 105
 106 static adns_status csp_textdata(vbuf *vb, const char *dp, int len) {
 107   unsigned char ch;
 108   char buf[10];
 109   int cn;
 110
 111   CSP_ADDSTR("\"");
 112   for (cn=0; cn<len; cn++) {
 113     ch= *dp++;
 114     if (ch >= 32 && ch <= 126 && ch != '"' && ch != '\\') {
 115       if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
 116     } else if (ch == '\\') {
 117       CSP_ADDSTR("\\\\");
 118     } else {
 119       sprintf(buf,"\\x%02x",ch);
 120       CSP_ADDSTR(buf);
 121     }
 122   }
 123   CSP_ADDSTR("\"");
 124
 125   return adns_s_ok;
 126 }
 127
 128 static adns_status csp_qstring(vbuf *vb, const char *dp) {
 129   return csp_textdata(vb, dp, strlen(dp));
 130 }
 131
 132 /*
 133  * _str  (mf,cs)
 134  */
 135
 136 static void mf_str(adns_query qu, void *datap) {
 137   char **rrp= datap;
 138
 139   adns__makefinal_str(qu,rrp);
 140 }
 141
 142 static adns_status cs_str(vbuf *vb, const void *datap) {
 143   const char *const *rrp= datap;
 144
 145   return csp_qstring(vb,*rrp);
 146 }
 147
 148 /*
 149  * _intstr  (mf,csp,cs)
 150  */
 151
 152 static void mf_intstr(adns_query qu, void *datap) {
 153   adns_rr_intstr *rrp= datap;
 154
 155   adns__makefinal_str(qu,&rrp->str);
 156 }
 157
 158 static adns_status csp_intstr(vbuf *vb, const adns_rr_intstr *rrp) {
 159   char buf[10];
 160
 161   sprintf(buf,"%u ",rrp->i);
 162   CSP_ADDSTR(buf);
 163   return csp_qstring(vb,rrp->str);
 164 }
 165
 166 static adns_status cs_intstr(vbuf *vb, const void *datap) {
 167   const adns_rr_intstr *rrp= datap;
 168
 169   return csp_intstr(vb,rrp);
 170 }
 171
 172 /*
 173  * _manyistr   (mf,cs)
 174  */
 175
 176 static void mf_manyistr(adns_query qu, void *datap) {
 177   adns_rr_intstr **rrp= datap;
 178   adns_rr_intstr *te, *table;
 179   void *tablev;
 180   int tc;
 181
 182   for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
 183   tablev= *rrp;
 184   adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
 185   *rrp= table= tablev;
 186   for (te= *rrp; te->i >= 0; te++)
 187     adns__makefinal_str(qu,&te->str);
 188 }
 189
 190 static adns_status cs_manyistr(vbuf *vb, const void *datap) {
 191   const adns_rr_intstr *const *rrp= datap;
 192   const adns_rr_intstr *current;
 193   adns_status st;
 194   int spc;
 195
 196   for (spc=0, current= *rrp; current->i >= 0; current++) {
 197     if (spc) CSP_ADDSTR(" ");
 198     st= csp_textdata(vb,current->str,current->i); if (st) return st;
 199   }
 200   return adns_s_ok;
 201 }
 202
 203 /*
 204  * _txt   (pa)
 205  */
 206
 207 static adns_status pa_txt(const parseinfo *pai, int cbyte, int max, void *datap) {
 208   adns_rr_intstr **rrp= datap, *table, *te;
 209   const byte *dgram= pai->dgram;
 210   int ti, tc, l, startbyte;
 211   adns_status st;
 212
 213   startbyte= cbyte;
 214   if (cbyte >= max) return adns_s_invaliddata;
 215   tc= 0;
 216   while (cbyte < max) {
 217     GET_B(cbyte,l);
 218     cbyte+= l;
 219     tc++;
 220   }
 221   if (cbyte != max) return adns_s_invaliddata;
 222
 223   table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
 224   if (!table) R_NOMEM;
 225
 226   for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
 227     st= pap_string(pai, &cbyte, max, &te->i, &te->str);
 228     if (st) return st;
 229   }
 230   assert(cbyte == max);
 231
 232   te->i= -1;
 233   te->str= 0;
 234
 235   *rrp= table;
 236   return adns_s_ok;
 237 }
 238
 239 /*
 240  * _inaddr   (pa,dip,di)
 241  */
 242
 243 static adns_status pa_inaddr(const parseinfo *pai, int cbyte, int max, void *datap) {
 244   struct in_addr *storeto= datap;
 245
 246   if (max-cbyte != 4) return adns_s_invaliddata;
 247   memcpy(storeto, pai->dgram + cbyte, 4);
 248   return adns_s_ok;
 249 }
 250
 251 static int search_sortlist(adns_state ads, struct in_addr ad) {
 252   const struct sortlist *slp;
 253   int i;
 254
 255   for (i=0, slp=ads->sortlist;
 256        i<ads->nsortlist && !((ad.s_addr & slp->mask.s_addr) == slp->base.s_addr);
 257        i++, slp++);
 258   return i;
 259 }
 260
 261 static int dip_inaddr(adns_state ads, struct in_addr a, struct in_addr b) {
 262   int ai, bi;
 263
 264   if (!ads->nsortlist) return 0;
 265
 266   ai= search_sortlist(ads,a);
 267   bi= search_sortlist(ads,b);
 268   return bi<ai;
 269 }
 270
 271 static int di_inaddr(adns_state ads, const void *datap_a, const void *datap_b) {
 272   const struct in_addr *ap= datap_a, *bp= datap_b;
 273
 274   return dip_inaddr(ads,*ap,*bp);
 275 }
 276
 277 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
 278   const struct in_addr *rrp= datap, rr= *rrp;
 279   const char *ia;
 280
 281   ia= inet_ntoa(rr); assert(ia);
 282   CSP_ADDSTR(ia);
 283   return adns_s_ok;
 284 }
 285
 286 /*
 287  * _addr   (pa,di,csp,cs)
 288  */
 289
 290 static adns_status pa_addr(const parseinfo *pai, int cbyte, int max, void *datap) {
 291   adns_rr_addr *storeto= datap;
 292   const byte *dgram= pai->dgram;
 293
 294   if (max-cbyte != 4) return adns_s_invaliddata;
 295   storeto->len= sizeof(storeto->addr.inet);
 296   memset(&storeto->addr,0,sizeof(storeto->addr.inet));
 297   storeto->addr.inet.sin_family= AF_INET;
 298   memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
 299   return adns_s_ok;
 300 }
 301
 302 static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
 303   const adns_rr_addr *ap= datap_a, *bp= datap_b;
 304
 305   assert(ap->addr.sa.sa_family == AF_INET);
 306   return dip_inaddr(ads, ap->addr.inet.sin_addr, bp->addr.inet.sin_addr);
 307 }
 308
 309 static int div_addr(void *context, const void *datap_a, const void *datap_b) {
 310   const adns_state ads= context;
 311
 312   return di_addr(ads, datap_a, datap_b);
 313 }
 314
 315 static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
 316   const char *ia;
 317   static char buf[30];
 318
 319   switch (rrp->addr.inet.sin_family) {
 320   case AF_INET:
 321     CSP_ADDSTR("AF_INET ");
 322     ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia);
 323     CSP_ADDSTR(ia);
 324     break;
 325   default:
 326     sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
 327     CSP_ADDSTR(buf);
 328     break;
 329   }
 330   return adns_s_ok;
 331 }
 332
 333 static adns_status cs_addr(vbuf *vb, const void *datap) {
 334   const adns_rr_addr *rrp= datap;
 335
 336   return csp_addr(vb,rrp);
 337 }
 338
 339 /*
 340  * _domain  (pap)
 341  */
 342
 343 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
 344                               char **domain_r, parsedomain_flags flags) {
 345   adns_status st;
 346   char *dm;
 347
 348   st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
 349                          pai->dgram,pai->dglen, cbyte_io, max);
 350   if (st) return st;
 351   if (!pai->qu->vb.used) return adns_s_invaliddata;
 352
 353   dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
 354   if (!dm) R_NOMEM;
 355
 356   dm[pai->qu->vb.used]= 0;
 357   memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
 358
 359   *domain_r= dm;
 360   return adns_s_ok;
 361 }
 362
 363 /*
 364  * _host_raw   (pa)
 365  */
 366
 367 static adns_status pa_host_raw(const parseinfo *pai, int cbyte, int max, void *datap) {
 368   char **rrp= datap;
 369   adns_status st;
 370
 371   st= pap_domain(pai, &cbyte, max, rrp,
 372                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 373   if (st) return st;
 374
 375   if (cbyte != max) return adns_s_invaliddata;
 376   return adns_s_ok;
 377 }
 378
 379 /*
 380  * _hostaddr   (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
 381  */
 382
 383 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
 384                                  int *cbyte_io, int count, int dmstart) {
 385   int rri, naddrs;
 386   int type, class, rdlen, rdstart, ownermatched;
 387   unsigned long ttl;
 388   adns_status st;
 389
 390   for (rri=0, naddrs=-1; rri<count; rri++) {
 391     st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, pai->dglen, cbyte_io,
 392                             &type, &class, &ttl, &rdlen, &rdstart,
 393                             pai->dgram, pai->dglen, dmstart, &ownermatched);
 394     if (st) return st;
 395     if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) {
 396       if (naddrs>0) break; else continue;
 397     }
 398     if (naddrs == -1) {
 399       naddrs= 0;
 400     }
 401     if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_rr_addr))) R_NOMEM;
 402     adns__update_expires(pai->qu,ttl,pai->now);
 403     st= pa_addr(pai, rdstart,rdstart+rdlen,
 404                 pai->qu->vb.buf + naddrs*sizeof(adns_rr_addr));
 405     if (st) return st;
 406     naddrs++;
 407   }
 408   if (naddrs >= 0) {
 409     ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_rr_addr));
 410     if (!ha->addrs) R_NOMEM;
 411     memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_rr_addr));
 412     ha->naddrs= naddrs;
 413     ha->astatus= adns_s_ok;
 414
 415     adns__isort(ha->addrs, naddrs, sizeof(adns_rr_addr), pai->qu->vb.buf,
 416                 div_addr, pai->ads);
 417   }
 418   return adns_s_ok;
 419 }
 420
 421 static void icb_hostaddr(adns_query parent, adns_query child) {
 422   adns_answer *cans= child->answer;
 423   adns_rr_hostaddr *rrp= child->ctx.info.hostaddr;
 424
 425   rrp->astatus= cans->status;
 426   rrp->naddrs= cans->nrrs;
 427   rrp->addrs= cans->rrs.addr;
 428   adns__transfer_interim(child, parent, rrp->addrs, rrp->naddrs*sizeof(adns_rr_addr));
 429
 430   if (!parent->children.head) adns__query_done(parent);
 431 }
 432
 433 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
 434                                 int max, adns_rr_hostaddr *rrp) {
 435   adns_status st;
 436   int dmstart, cbyte;
 437   qcontext ctx;
 438   int id;
 439   adns_query nqu;
 440   adns_queryflags nflags;
 441
 442   dmstart= cbyte= *cbyte_io;
 443   st= pap_domain(pai, &cbyte, max, &rrp->host,
 444                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 445   if (st) return st;
 446   *cbyte_io= cbyte;
 447
 448   rrp->astatus= adns_s_ok;
 449   rrp->naddrs= -1;
 450   rrp->addrs= 0;
 451
 452   cbyte= pai->nsstart;
 453
 454   st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart);
 455   if (st) return st;
 456   if (rrp->naddrs != -1) return adns_s_ok;
 457
 458   st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart);
 459   if (st) return st;
 460   if (rrp->naddrs != -1) return adns_s_ok;
 461
 462   st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
 463                             pai->dgram, pai->dglen, dmstart,
 464                             adns_r_addr, adns_qf_quoteok_query);
 465   if (st) return st;
 466
 467   ctx.ext= 0;
 468   ctx.callback= icb_hostaddr;
 469   ctx.info.hostaddr= rrp;
 470
 471   nflags= adns_qf_quoteok_query;
 472   if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
 473
 474   st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
 475                             &pai->qu->vb, id, nflags, pai->now, &ctx);
 476   if (st) return st;
 477
 478   nqu->parent= pai->qu;
 479   LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
 480
 481   return adns_s_ok;
 482 }
 483
 484 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, int max, void *datap) {
 485   adns_rr_hostaddr *rrp= datap;
 486   adns_status st;
 487
 488   st= pap_hostaddr(pai, &cbyte, max, rrp);
 489   if (st) return st;
 490   if (cbyte != max) return adns_s_invaliddata;
 491
 492   return adns_s_ok;
 493 }
 494
 495 static int dip_hostaddr(adns_state ads, const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
 496   if (ap->astatus != bp->astatus) return ap->astatus;
 497   if (ap->astatus) return 0;
 498
 499   assert(ap->addrs[0].addr.sa.sa_family == AF_INET);
 500   assert(bp->addrs[0].addr.sa.sa_family == AF_INET);
 501   return dip_inaddr(ads,
 502                     ap->addrs[0].addr.inet.sin_addr,
 503                     bp->addrs[0].addr.inet.sin_addr);
 504 }
 505
 506 static int di_hostaddr(adns_state ads, const void *datap_a, const void *datap_b) {
 507   const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
 508
 509   return dip_hostaddr(ads, ap,bp);
 510 }
 511
 512 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
 513   void *tablev;
 514
 515   adns__makefinal_str(qu,&rrp->host);
 516   tablev= rrp->addrs;
 517   adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs));
 518   rrp->addrs= tablev;
 519 }
 520
 521 static void mf_hostaddr(adns_query qu, void *datap) {
 522   adns_rr_hostaddr *rrp= datap;
 523
 524   mfp_hostaddr(qu,rrp);
 525 }
 526
 527 static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
 528   const char *to_add;
 529   adns_status st;
 530   int i;
 531
 532   st= csp_qstring(vb,rrp->host); if (st) return st;
 533
 534   if (rrp->astatus) {
 535     CSP_ADDSTR(" - ");
 536     CSP_ADDSTR(adns_strerror(rrp->astatus));
 537   } else {
 538     assert(rrp->naddrs > 0);
 539     for (i=0, to_add= ": "; i<rrp->naddrs; i++, to_add= ", ") {
 540       CSP_ADDSTR(to_add);
 541       st= csp_addr(vb,&rrp->addrs[i]);
 542     }
 543   }
 544   return adns_s_ok;
 545 }
 546
 547 static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
 548   const adns_rr_hostaddr *rrp= datap;
 549
 550   return csp_hostaddr(vb,rrp);
 551 }
 552
 553 /*
 554  * _mx_raw   (pa,di)
 555  */
 556
 557 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, int max, void *datap) {
 558   const byte *dgram= pai->dgram;
 559   adns_rr_intstr *rrp= datap;
 560   adns_status st;
 561   int pref;
 562
 563   if (cbyte+2 > max) return adns_s_invaliddata;
 564   GET_W(cbyte,pref);
 565   rrp->i= pref;
 566   st= pap_domain(pai, &cbyte, max, &rrp->str,
 567                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 568   if (st) return st;
 569
 570   if (cbyte != max) return adns_s_invaliddata;
 571   return adns_s_ok;
 572 }
 573
 574 static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
 575   const adns_rr_intstr *ap= datap_a, *bp= datap_b;
 576
 577   if (ap->i < bp->i) return 0;
 578   if (ap->i > bp->i) return 1;
 579   return 0;
 580 }
 581
 582 /*
 583  * _mx   (pa,di)
 584  */
 585
 586 static adns_status pa_mx(const parseinfo *pai, int cbyte, int max, void *datap) {
 587   const byte *dgram= pai->dgram;
 588   adns_rr_inthostaddr *rrp= datap;
 589   adns_status st;
 590   int pref;
 591
 592   if (cbyte+2 > max) return adns_s_invaliddata;
 593   GET_W(cbyte,pref);
 594   rrp->i= pref;
 595   st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
 596   if (st) return st;
 597
 598   if (cbyte != max) return adns_s_invaliddata;
 599   return adns_s_ok;
 600 }
 601
 602 static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
 603   const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
 604
 605   if (ap->i < bp->i) return 0;
 606   if (ap->i > bp->i) return 1;
 607   return dip_hostaddr(ads, &ap->ha, &bp->ha);
 608 }
 609
 610 /*
 611  * _inthostaddr  (mf,cs)
 612  */
 613
 614 static void mf_inthostaddr(adns_query qu, void *datap) {
 615   adns_rr_inthostaddr *rrp= datap;
 616
 617   mfp_hostaddr(qu,&rrp->ha);
 618 }
 619
 620 static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
 621   const adns_rr_inthostaddr *rrp= datap;
 622   char buf[10];
 623
 624   sprintf(buf,"%u ",rrp->i);
 625   CSP_ADDSTR(buf);
 626
 627   return csp_hostaddr(vb,&rrp->ha);
 628 }
 629
 630 /*
 631  * _ptr   (pa, +icb_ptr)
 632  */
 633
 634 static void icb_ptr(adns_query parent, adns_query child) {
 635   adns_answer *cans= child->answer;
 636   const adns_rr_addr *queried, *found;
 637   int i;
 638
 639   if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
 640     adns__query_fail(parent,adns_s_inconsistent);
 641     return;
 642   } else if (cans->status) {
 643     adns__query_fail(parent,cans->status);
 644     return;
 645   }
 646
 647   queried= &parent->ctx.info.ptr_parent_addr;
 648   for (i=0, found=cans->rrs.addr; i<cans->nrrs; i++, found++) {
 649     if (queried->len == found->len &&
 650         !memcmp(&queried->addr,&found->addr,queried->len)) {
 651       if (!parent->children.head) adns__query_done(parent);
 652       return;
 653     }
 654   }
 655
 656   adns__query_fail(parent,adns_s_inconsistent);
 657 }
 658
 659 static adns_status pa_ptr(const parseinfo *pai, int dmstart, int max, void *datap) {
 660   static const char *(expectdomain[])= { DNS_INADDR_ARPA };
 661
 662   char **rrp= datap;
 663   adns_status st;
 664   adns_rr_addr *ap;
 665   findlabel_state fls;
 666   char *ep;
 667   byte ipv[4];
 668   char labbuf[4];
 669   int cbyte, i, lablen, labstart, l, id;
 670   adns_query nqu;
 671   qcontext ctx;
 672
 673   cbyte= dmstart;
 674   st= pap_domain(pai, &cbyte, max, rrp,
 675                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 676   if (st) return st;
 677   if (cbyte != max) return adns_s_invaliddata;
 678
 679   ap= &pai->qu->ctx.info.ptr_parent_addr;
 680   if (!ap->len) {
 681     adns__findlabel_start(&fls, pai->ads, -1, pai->qu,
 682                           pai->qu->query_dgram, pai->qu->query_dglen,
 683                           pai->qu->query_dglen, DNS_HDRSIZE, 0);
 684     for (i=0; i<4; i++) {
 685       st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st);
 686       if (lablen<=0 || lablen>3) return adns_s_querydomainwrong;
 687       memcpy(labbuf, pai->qu->query_dgram + labstart, lablen);  labbuf[lablen]= 0;
 688       ipv[3-i]= strtoul(labbuf,&ep,10);  if (*ep) return adns_s_querydomainwrong;
 689       if (lablen>1 && pai->qu->query_dgram[labstart]=='0')
 690         return adns_s_querydomainwrong;
 691     }
 692     for (i=0; i<sizeof(expectdomain)/sizeof(*expectdomain); i++) {
 693       st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st);
 694       l= strlen(expectdomain[i]);
 695       if (lablen != l || memcmp(pai->qu->query_dgram + labstart, expectdomain[i], l))
 696         return adns_s_querydomainwrong;
 697     }
 698     st= adns__findlabel_next(&fls,&lablen,0); assert(!st);
 699     if (lablen) return adns_s_querydomainwrong;
 700
 701     ap->len= sizeof(struct sockaddr_in);
 702     memset(&ap->addr,0,sizeof(ap->addr.inet));
 703     ap->addr.inet.sin_family= AF_INET;
 704     ap->addr.inet.sin_addr.s_addr=
 705       htonl((ipv[0]<<24) | (ipv[1]<<16) | (ipv[2]<<8) | (ipv[3]));
 706   }
 707
 708   st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
 709                             pai->dgram, pai->dglen, dmstart,
 710                             adns_r_addr, adns_qf_quoteok_query);
 711   if (st) return st;
 712
 713   ctx.ext= 0;
 714   ctx.callback= icb_ptr;
 715   memset(&ctx.info,0,sizeof(ctx.info));
 716   st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
 717                             &pai->qu->vb, id,
 718                             adns_qf_quoteok_query, pai->now, &ctx);
 719   if (st) return st;
 720
 721   nqu->parent= pai->qu;
 722   LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
 723
 724   return adns_s_ok;
 725 }
 726
 727 /*
 728  * _strpair   (mf,cs)
 729  */
 730
 731 static void mf_strpair(adns_query qu, void *datap) {
 732   adns_rr_strpair *rrp= datap;
 733
 734   adns__makefinal_str(qu,&rrp->array[0]);
 735   adns__makefinal_str(qu,&rrp->array[1]);
 736 }
 737
 738 static adns_status cs_strpair(vbuf *vb, const void *datap) {
 739   const adns_rr_strpair *rrp= datap;
 740   adns_status st;
 741
 742   st= csp_qstring(vb,rrp->array[0]);  if (st) return st;
 743   CSP_ADDSTR(" ");
 744   st= csp_qstring(vb,rrp->array[1]);  if (st) return st;
 745
 746   return adns_s_ok;
 747 }
 748
 749 /*
 750  * _intstrpair   (mf,cs)
 751  */
 752
 753 static void mf_intstrpair(adns_query qu, void *datap) {
 754   adns_rr_intstrpair *rrp= datap;
 755
 756   adns__makefinal_str(qu,&rrp->array[0].str);
 757   adns__makefinal_str(qu,&rrp->array[1].str);
 758 }
 759
 760 static adns_status cs_intstrpair(vbuf *vb, const void *datap) {
 761   const adns_rr_intstrpair *rrp= datap;
 762   adns_status st;
 763
 764   st= csp_intstr(vb,&rrp->array[0]);  if (st) return st;
 765   CSP_ADDSTR(" ");
 766   st= csp_intstr(vb,&rrp->array[1]);  if (st) return st;
 767
 768   return adns_s_ok;
 769 }
 770
 771 /*
 772  * _hinfo   (pa)
 773  */
 774
 775 static adns_status pa_hinfo(const parseinfo *pai, int cbyte, int max, void *datap) {
 776   adns_rr_intstrpair *rrp= datap;
 777   adns_status st;
 778   int i;
 779
 780   for (i=0; i<2; i++) {
 781     st= pap_string(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
 782     if (st) return st;
 783   }
 784
 785   if (cbyte != max) return adns_s_invaliddata;
 786
 787   return adns_s_ok;
 788 }
 789
 790 /*
 791  * _mailbox   (pap)
 792  */
 793
 794 static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
 795                                char **mb_r) {
 796   int lablen, labstart, i, needquote, c, r, neednorm;
 797   const unsigned char *p;
 798   char *str;
 799   findlabel_state fls;
 800   adns_status st;
 801   vbuf *vb;
 802
 803   vb= &pai->qu->vb;
 804   vb->used= 0;
 805   adns__findlabel_start(&fls, pai->ads,
 806                         -1, pai->qu,
 807                         pai->dgram, pai->dglen, max,
 808                         *cbyte_io, cbyte_io);
 809   st= adns__findlabel_next(&fls,&lablen,&labstart);
 810   if (!lablen) {
 811     adns__vbuf_appendstr(vb,"<>");
 812     goto x_ok;
 813   }
 814
 815   neednorm= 1;
 816   for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
 817     c= *p++;
 818     if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
 819     if (c == '.' && !neednorm) neednorm= 1;
 820     else if (strchr("()<>@,;:\\\".[]",c)) needquote++;
 821     else neednorm= 0;
 822   }
 823
 824   if (needquote || neednorm) {
 825     r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
 826     adns__vbuf_appendq(vb,"\"",1);
 827     for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
 828       c= *p;
 829       if (strchr("()<>@,;:\\\".[]",c)) adns__vbuf_appendq(vb,"\\",1);
 830       adns__vbuf_appendq(vb,p,1);
 831     }
 832     adns__vbuf_appendq(vb,"\"",1);
 833   } else {
 834     r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
 835   }
 836
 837   r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
 838
 839   st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
 840   if (st) return st;
 841
 842  x_ok:
 843   str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
 844   memcpy(str,vb->buf,vb->used);
 845   str[vb->used]= 0;
 846   *mb_r= str;
 847   return adns_s_ok;
 848 }
 849
 850 /*
 851  * _rp   (pa)
 852  */
 853
 854 static adns_status pa_rp(const parseinfo *pai, int cbyte, int max, void *datap) {
 855   adns_rr_strpair *rrp= datap;
 856   adns_status st;
 857
 858   st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
 859   if (st) return st;
 860
 861   st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
 862   if (st) return st;
 863
 864   if (cbyte != max) return adns_s_invaliddata;
 865   return adns_s_ok;
 866 }
 867
 868 /*
 869  * _soa   (pa,mf,cs)
 870  */
 871
 872 static adns_status pa_soa(const parseinfo *pai, int cbyte, int max, void *datap) {
 873   adns_rr_soa *rrp= datap;
 874   const byte *dgram= pai->dgram;
 875   adns_status st;
 876   int msw, lsw, i;
 877
 878   st= pap_domain(pai, &cbyte, max, &rrp->mname,
 879                  pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
 880   if (st) return st;
 881
 882   st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
 883   if (st) return st;
 884
 885   if (cbyte+20 != max) return adns_s_invaliddata;
 886
 887   for (i=0; i<5; i++) {
 888     GET_W(cbyte,msw);
 889     GET_W(cbyte,lsw);
 890     (&rrp->serial)[i]= (msw<<16) | lsw;
 891   }
 892
 893   return adns_s_ok;
 894 }
 895
 896 static void mf_soa(adns_query qu, void *datap) {
 897   adns_rr_soa *rrp= datap;
 898
 899   adns__makefinal_str(qu,&rrp->mname);
 900   adns__makefinal_str(qu,&rrp->rname);
 901 }
 902
 903 static adns_status cs_soa(vbuf *vb, const void *datap) {
 904   const adns_rr_soa *rrp= datap;
 905   char buf[20];
 906   int i;
 907   adns_status st;
 908
 909   st= csp_qstring(vb,rrp->mname);  if (st) return st;
 910   CSP_ADDSTR(" ");
 911   st= csp_qstring(vb,rrp->rname);  if (st) return st;
 912
 913   for (i=0; i<5; i++) {
 914     sprintf(buf," %lu",(&rrp->serial)[i]);
 915     CSP_ADDSTR(buf);
 916   }
 917
 918   return adns_s_ok;
 919 }
 920
 921 /*
 922  * _flat   (mf)
 923  */
 924
 925 static void mf_flat(adns_query qu, void *data) { }
 926
 927 /*
 928  * Now the table.
 929  */
 930
 931 #define TYPESZ_M(member)           (sizeof(*((adns_answer*)0)->rrs.member))
 932
 933 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
 934 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
 935
 936 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer) \
 937  { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_##memb, cs_##memb, parser, comparer }
 938 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer) \
 939  { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_flat, cs_##memb, parser, comparer }
 940
 941 static const typeinfo typeinfos[] = {
 942 /* Must be in ascending order of rrtype ! */
 943 /* mem-mgmt code     rrt     fmt      member       parser        comparer    */
 944
 945   FLAT_TYPE(a,       "A",     0,      inaddr,      pa_inaddr,    di_inaddr   ),
 946   DEEP_TYPE(ns_raw,  "NS",   "raw",   str,         pa_host_raw,  0           ),
 947   DEEP_TYPE(cname,   "CNAME", 0,      str,         pa_host_raw,  0           ),
 948   DEEP_TYPE(soa_raw, "SOA",  "raw",   soa,         pa_soa,       0           ),
 949   DEEP_TYPE(ptr_raw, "PTR",  "raw",   str,         pa_host_raw,  0           ),
 950   DEEP_TYPE(hinfo,   "HINFO", 0,      intstrpair,  pa_hinfo,     0           ),
 951   DEEP_TYPE(mx_raw,  "MX",   "raw",   intstr,      pa_mx_raw,    di_mx_raw   ),
 952   DEEP_TYPE(txt,     "TXT",   0,      manyistr,    pa_txt,       0           ),
 953   DEEP_TYPE(rp_raw,  "RP",   "raw",   strpair,     pa_rp,        0           ),
 954
 955   FLAT_TYPE(addr,    "A",  "addr",    addr,        pa_addr,      di_addr     ),
 956   DEEP_TYPE(ns,      "NS", "+addr",   hostaddr,    pa_hostaddr,  di_hostaddr ),
 957   DEEP_TYPE(ptr,     "PTR","checked", str,         pa_ptr,       0           ),
 958   DEEP_TYPE(mx,      "MX", "+addr",   inthostaddr, pa_mx,        di_mx       ),
 959
 960   DEEP_TYPE(soa,     "SOA","822",     soa,         pa_soa,       0           ),
 961   DEEP_TYPE(rp,      "RP", "822",     strpair,     pa_rp,        0           ),
 962 };
 963
 964 const typeinfo *adns__findtype(adns_rrtype type) {
 965   const typeinfo *begin, *end, *mid;
 966
 967   begin= typeinfos;  end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
 968
 969   while (begin < end) {
 970     mid= begin + ((end-begin)>>1);
 971     if (mid->type == type) return mid;
 972     if (type > mid->type) begin= mid+1;
 973     else end= mid;
 974   }
 975   return 0;
 976 }