1238106Sdes/* 2238106Sdes * iterator/iter_delegpt.c - delegation point with NS and address information. 3238106Sdes * 4238106Sdes * Copyright (c) 2007, NLnet Labs. All rights reserved. 5238106Sdes * 6238106Sdes * This software is open source. 7238106Sdes * 8238106Sdes * Redistribution and use in source and binary forms, with or without 9238106Sdes * modification, are permitted provided that the following conditions 10238106Sdes * are met: 11238106Sdes * 12238106Sdes * Redistributions of source code must retain the above copyright notice, 13238106Sdes * this list of conditions and the following disclaimer. 14238106Sdes * 15238106Sdes * Redistributions in binary form must reproduce the above copyright notice, 16238106Sdes * this list of conditions and the following disclaimer in the documentation 17238106Sdes * and/or other materials provided with the distribution. 18238106Sdes * 19238106Sdes * Neither the name of the NLNET LABS nor the names of its contributors may 20238106Sdes * be used to endorse or promote products derived from this software without 21238106Sdes * specific prior written permission. 22238106Sdes * 23238106Sdes * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24266114Sdes * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25266114Sdes * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26266114Sdes * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27266114Sdes * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28266114Sdes * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29266114Sdes * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30266114Sdes * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31266114Sdes * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32266114Sdes * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33266114Sdes * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34238106Sdes */ 35238106Sdes 36238106Sdes/** 37238106Sdes * \file 38238106Sdes * 39238106Sdes * This file implements the Delegation Point. It contains a list of name servers 40238106Sdes * and their addresses if known. 41238106Sdes */ 42238106Sdes#include "config.h" 43238106Sdes#include "iterator/iter_delegpt.h" 44238106Sdes#include "services/cache/dns.h" 45238106Sdes#include "util/regional.h" 46238106Sdes#include "util/data/dname.h" 47238106Sdes#include "util/data/packed_rrset.h" 48238106Sdes#include "util/data/msgreply.h" 49238106Sdes#include "util/net_help.h" 50287917Sdes#include "sldns/rrdef.h" 51287917Sdes#include "sldns/sbuffer.h" 52238106Sdes 53238106Sdesstruct delegpt* 54238106Sdesdelegpt_create(struct regional* region) 55238106Sdes{ 56238106Sdes struct delegpt* dp=(struct delegpt*)regional_alloc( 57238106Sdes region, sizeof(*dp)); 58238106Sdes if(!dp) 59238106Sdes return NULL; 60238106Sdes memset(dp, 0, sizeof(*dp)); 61238106Sdes return dp; 62238106Sdes} 63238106Sdes 64238106Sdesstruct delegpt* delegpt_copy(struct delegpt* dp, struct regional* region) 65238106Sdes{ 66238106Sdes struct delegpt* copy = delegpt_create(region); 67238106Sdes struct delegpt_ns* ns; 68238106Sdes struct delegpt_addr* a; 69238106Sdes if(!copy) 70238106Sdes return NULL; 71238106Sdes if(!delegpt_set_name(copy, region, dp->name)) 72238106Sdes return NULL; 73238106Sdes copy->bogus = dp->bogus; 74238106Sdes copy->has_parent_side_NS = dp->has_parent_side_NS; 75238106Sdes for(ns = dp->nslist; ns; ns = ns->next) { 76266114Sdes if(!delegpt_add_ns(copy, region, ns->name, ns->lame)) 77238106Sdes return NULL; 78238106Sdes copy->nslist->resolved = ns->resolved; 79238106Sdes copy->nslist->got4 = ns->got4; 80238106Sdes copy->nslist->got6 = ns->got6; 81238106Sdes copy->nslist->done_pside4 = ns->done_pside4; 82238106Sdes copy->nslist->done_pside6 = ns->done_pside6; 83238106Sdes } 84238106Sdes for(a = dp->target_list; a; a = a->next_target) { 85238106Sdes if(!delegpt_add_addr(copy, region, &a->addr, a->addrlen, 86238106Sdes a->bogus, a->lame)) 87238106Sdes return NULL; 88238106Sdes } 89238106Sdes return copy; 90238106Sdes} 91238106Sdes 92238106Sdesint 93238106Sdesdelegpt_set_name(struct delegpt* dp, struct regional* region, uint8_t* name) 94238106Sdes{ 95238106Sdes log_assert(!dp->dp_type_mlc); 96238106Sdes dp->namelabs = dname_count_size_labels(name, &dp->namelen); 97238106Sdes dp->name = regional_alloc_init(region, name, dp->namelen); 98238106Sdes return dp->name != 0; 99238106Sdes} 100238106Sdes 101238106Sdesint 102238106Sdesdelegpt_add_ns(struct delegpt* dp, struct regional* region, uint8_t* name, 103266114Sdes uint8_t lame) 104238106Sdes{ 105238106Sdes struct delegpt_ns* ns; 106238106Sdes size_t len; 107238106Sdes (void)dname_count_size_labels(name, &len); 108238106Sdes log_assert(!dp->dp_type_mlc); 109238106Sdes /* slow check for duplicates to avoid counting failures when 110238106Sdes * adding the same server as a dependency twice */ 111238106Sdes if(delegpt_find_ns(dp, name, len)) 112238106Sdes return 1; 113238106Sdes ns = (struct delegpt_ns*)regional_alloc(region, 114238106Sdes sizeof(struct delegpt_ns)); 115238106Sdes if(!ns) 116238106Sdes return 0; 117238106Sdes ns->next = dp->nslist; 118238106Sdes ns->namelen = len; 119238106Sdes dp->nslist = ns; 120238106Sdes ns->name = regional_alloc_init(region, name, ns->namelen); 121238106Sdes ns->resolved = 0; 122238106Sdes ns->got4 = 0; 123238106Sdes ns->got6 = 0; 124266114Sdes ns->lame = lame; 125238106Sdes ns->done_pside4 = 0; 126238106Sdes ns->done_pside6 = 0; 127238106Sdes return ns->name != 0; 128238106Sdes} 129238106Sdes 130238106Sdesstruct delegpt_ns* 131238106Sdesdelegpt_find_ns(struct delegpt* dp, uint8_t* name, size_t namelen) 132238106Sdes{ 133238106Sdes struct delegpt_ns* p = dp->nslist; 134238106Sdes while(p) { 135238106Sdes if(namelen == p->namelen && 136238106Sdes query_dname_compare(name, p->name) == 0) { 137238106Sdes return p; 138238106Sdes } 139238106Sdes p = p->next; 140238106Sdes } 141238106Sdes return NULL; 142238106Sdes} 143238106Sdes 144238106Sdesstruct delegpt_addr* 145238106Sdesdelegpt_find_addr(struct delegpt* dp, struct sockaddr_storage* addr, 146238106Sdes socklen_t addrlen) 147238106Sdes{ 148238106Sdes struct delegpt_addr* p = dp->target_list; 149238106Sdes while(p) { 150276605Sdes if(sockaddr_cmp_addr(addr, addrlen, &p->addr, p->addrlen)==0 151276605Sdes && ((struct sockaddr_in*)addr)->sin_port == 152276605Sdes ((struct sockaddr_in*)&p->addr)->sin_port) { 153238106Sdes return p; 154238106Sdes } 155238106Sdes p = p->next_target; 156238106Sdes } 157238106Sdes return NULL; 158238106Sdes} 159238106Sdes 160238106Sdesint 161238106Sdesdelegpt_add_target(struct delegpt* dp, struct regional* region, 162238106Sdes uint8_t* name, size_t namelen, struct sockaddr_storage* addr, 163266114Sdes socklen_t addrlen, uint8_t bogus, uint8_t lame) 164238106Sdes{ 165238106Sdes struct delegpt_ns* ns = delegpt_find_ns(dp, name, namelen); 166238106Sdes log_assert(!dp->dp_type_mlc); 167238106Sdes if(!ns) { 168238106Sdes /* ignore it */ 169238106Sdes return 1; 170238106Sdes } 171238106Sdes if(!lame) { 172238106Sdes if(addr_is_ip6(addr, addrlen)) 173238106Sdes ns->got6 = 1; 174238106Sdes else ns->got4 = 1; 175238106Sdes if(ns->got4 && ns->got6) 176238106Sdes ns->resolved = 1; 177238106Sdes } 178238106Sdes return delegpt_add_addr(dp, region, addr, addrlen, bogus, lame); 179238106Sdes} 180238106Sdes 181238106Sdesint 182238106Sdesdelegpt_add_addr(struct delegpt* dp, struct regional* region, 183266114Sdes struct sockaddr_storage* addr, socklen_t addrlen, uint8_t bogus, 184266114Sdes uint8_t lame) 185238106Sdes{ 186238106Sdes struct delegpt_addr* a; 187238106Sdes log_assert(!dp->dp_type_mlc); 188238106Sdes /* check for duplicates */ 189238106Sdes if((a = delegpt_find_addr(dp, addr, addrlen))) { 190238106Sdes if(bogus) 191238106Sdes a->bogus = bogus; 192238106Sdes if(!lame) 193238106Sdes a->lame = 0; 194238106Sdes return 1; 195238106Sdes } 196238106Sdes 197238106Sdes a = (struct delegpt_addr*)regional_alloc(region, 198238106Sdes sizeof(struct delegpt_addr)); 199238106Sdes if(!a) 200238106Sdes return 0; 201238106Sdes a->next_target = dp->target_list; 202238106Sdes dp->target_list = a; 203238106Sdes a->next_result = 0; 204238106Sdes a->next_usable = dp->usable_list; 205238106Sdes dp->usable_list = a; 206238106Sdes memcpy(&a->addr, addr, addrlen); 207238106Sdes a->addrlen = addrlen; 208238106Sdes a->attempts = 0; 209238106Sdes a->bogus = bogus; 210238106Sdes a->lame = lame; 211266114Sdes a->dnsseclame = 0; 212238106Sdes return 1; 213238106Sdes} 214238106Sdes 215238106Sdesvoid 216238106Sdesdelegpt_count_ns(struct delegpt* dp, size_t* numns, size_t* missing) 217238106Sdes{ 218238106Sdes struct delegpt_ns* ns; 219238106Sdes *numns = 0; 220238106Sdes *missing = 0; 221238106Sdes for(ns = dp->nslist; ns; ns = ns->next) { 222238106Sdes (*numns)++; 223238106Sdes if(!ns->resolved) 224238106Sdes (*missing)++; 225238106Sdes } 226238106Sdes} 227238106Sdes 228238106Sdesvoid 229238106Sdesdelegpt_count_addr(struct delegpt* dp, size_t* numaddr, size_t* numres, 230238106Sdes size_t* numavail) 231238106Sdes{ 232238106Sdes struct delegpt_addr* a; 233238106Sdes *numaddr = 0; 234238106Sdes *numres = 0; 235238106Sdes *numavail = 0; 236238106Sdes for(a = dp->target_list; a; a = a->next_target) { 237238106Sdes (*numaddr)++; 238238106Sdes } 239238106Sdes for(a = dp->result_list; a; a = a->next_result) { 240238106Sdes (*numres)++; 241238106Sdes } 242238106Sdes for(a = dp->usable_list; a; a = a->next_usable) { 243238106Sdes (*numavail)++; 244238106Sdes } 245238106Sdes} 246238106Sdes 247238106Sdesvoid delegpt_log(enum verbosity_value v, struct delegpt* dp) 248238106Sdes{ 249238106Sdes char buf[LDNS_MAX_DOMAINLEN+1]; 250238106Sdes struct delegpt_ns* ns; 251238106Sdes struct delegpt_addr* a; 252238106Sdes size_t missing=0, numns=0, numaddr=0, numres=0, numavail=0; 253238106Sdes if(verbosity < v) 254238106Sdes return; 255238106Sdes dname_str(dp->name, buf); 256238106Sdes if(dp->nslist == NULL && dp->target_list == NULL) { 257238106Sdes log_info("DelegationPoint<%s>: empty", buf); 258238106Sdes return; 259238106Sdes } 260238106Sdes delegpt_count_ns(dp, &numns, &missing); 261238106Sdes delegpt_count_addr(dp, &numaddr, &numres, &numavail); 262238106Sdes log_info("DelegationPoint<%s>: %u names (%u missing), " 263238106Sdes "%u addrs (%u result, %u avail)%s", 264238106Sdes buf, (unsigned)numns, (unsigned)missing, 265238106Sdes (unsigned)numaddr, (unsigned)numres, (unsigned)numavail, 266238106Sdes (dp->has_parent_side_NS?" parentNS":" cacheNS")); 267238106Sdes if(verbosity >= VERB_ALGO) { 268238106Sdes for(ns = dp->nslist; ns; ns = ns->next) { 269238106Sdes dname_str(ns->name, buf); 270238106Sdes log_info(" %s %s%s%s%s%s%s%s", buf, 271238106Sdes (ns->resolved?"*":""), 272238106Sdes (ns->got4?" A":""), (ns->got6?" AAAA":""), 273238106Sdes (dp->bogus?" BOGUS":""), (ns->lame?" PARENTSIDE":""), 274238106Sdes (ns->done_pside4?" PSIDE_A":""), 275238106Sdes (ns->done_pside6?" PSIDE_AAAA":"")); 276238106Sdes } 277238106Sdes for(a = dp->target_list; a; a = a->next_target) { 278238106Sdes const char* str = " "; 279238106Sdes if(a->bogus && a->lame) str = " BOGUS ADDR_LAME "; 280238106Sdes else if(a->bogus) str = " BOGUS "; 281238106Sdes else if(a->lame) str = " ADDR_LAME "; 282238106Sdes log_addr(VERB_ALGO, str, &a->addr, a->addrlen); 283238106Sdes } 284238106Sdes } 285238106Sdes} 286238106Sdes 287238106Sdesvoid 288238106Sdesdelegpt_add_unused_targets(struct delegpt* dp) 289238106Sdes{ 290238106Sdes struct delegpt_addr* usa = dp->usable_list; 291238106Sdes dp->usable_list = NULL; 292238106Sdes while(usa) { 293238106Sdes usa->next_result = dp->result_list; 294238106Sdes dp->result_list = usa; 295238106Sdes usa = usa->next_usable; 296238106Sdes } 297238106Sdes} 298238106Sdes 299238106Sdessize_t 300238106Sdesdelegpt_count_targets(struct delegpt* dp) 301238106Sdes{ 302238106Sdes struct delegpt_addr* a; 303238106Sdes size_t n = 0; 304238106Sdes for(a = dp->target_list; a; a = a->next_target) 305238106Sdes n++; 306238106Sdes return n; 307238106Sdes} 308238106Sdes 309238106Sdessize_t 310238106Sdesdelegpt_count_missing_targets(struct delegpt* dp) 311238106Sdes{ 312238106Sdes struct delegpt_ns* ns; 313238106Sdes size_t n = 0; 314238106Sdes for(ns = dp->nslist; ns; ns = ns->next) 315238106Sdes if(!ns->resolved) 316238106Sdes n++; 317238106Sdes return n; 318238106Sdes} 319238106Sdes 320238106Sdes/** find NS rrset in given list */ 321238106Sdesstatic struct ub_packed_rrset_key* 322238106Sdesfind_NS(struct reply_info* rep, size_t from, size_t to) 323238106Sdes{ 324238106Sdes size_t i; 325238106Sdes for(i=from; i<to; i++) { 326238106Sdes if(ntohs(rep->rrsets[i]->rk.type) == LDNS_RR_TYPE_NS) 327238106Sdes return rep->rrsets[i]; 328238106Sdes } 329238106Sdes return NULL; 330238106Sdes} 331238106Sdes 332238106Sdesstruct delegpt* 333238106Sdesdelegpt_from_message(struct dns_msg* msg, struct regional* region) 334238106Sdes{ 335238106Sdes struct ub_packed_rrset_key* ns_rrset = NULL; 336238106Sdes struct delegpt* dp; 337238106Sdes size_t i; 338238106Sdes /* look for NS records in the authority section... */ 339238106Sdes ns_rrset = find_NS(msg->rep, msg->rep->an_numrrsets, 340238106Sdes msg->rep->an_numrrsets+msg->rep->ns_numrrsets); 341238106Sdes 342238106Sdes /* In some cases (even legitimate, perfectly legal cases), the 343238106Sdes * NS set for the "referral" might be in the answer section. */ 344238106Sdes if(!ns_rrset) 345238106Sdes ns_rrset = find_NS(msg->rep, 0, msg->rep->an_numrrsets); 346238106Sdes 347238106Sdes /* If there was no NS rrset in the authority section, then this 348238106Sdes * wasn't a referral message. (It might not actually be a 349238106Sdes * referral message anyway) */ 350238106Sdes if(!ns_rrset) 351238106Sdes return NULL; 352238106Sdes 353238106Sdes /* If we found any, then Yay! we have a delegation point. */ 354238106Sdes dp = delegpt_create(region); 355238106Sdes if(!dp) 356238106Sdes return NULL; 357238106Sdes dp->has_parent_side_NS = 1; /* created from message */ 358238106Sdes if(!delegpt_set_name(dp, region, ns_rrset->rk.dname)) 359238106Sdes return NULL; 360238106Sdes if(!delegpt_rrset_add_ns(dp, region, ns_rrset, 0)) 361238106Sdes return NULL; 362238106Sdes 363238106Sdes /* add glue, A and AAAA in answer and additional section */ 364238106Sdes for(i=0; i<msg->rep->rrset_count; i++) { 365238106Sdes struct ub_packed_rrset_key* s = msg->rep->rrsets[i]; 366238106Sdes /* skip auth section. FIXME really needed?*/ 367238106Sdes if(msg->rep->an_numrrsets <= i && 368238106Sdes i < (msg->rep->an_numrrsets+msg->rep->ns_numrrsets)) 369238106Sdes continue; 370238106Sdes 371238106Sdes if(ntohs(s->rk.type) == LDNS_RR_TYPE_A) { 372238106Sdes if(!delegpt_add_rrset_A(dp, region, s, 0)) 373238106Sdes return NULL; 374238106Sdes } else if(ntohs(s->rk.type) == LDNS_RR_TYPE_AAAA) { 375238106Sdes if(!delegpt_add_rrset_AAAA(dp, region, s, 0)) 376238106Sdes return NULL; 377238106Sdes } 378238106Sdes } 379238106Sdes return dp; 380238106Sdes} 381238106Sdes 382238106Sdesint 383238106Sdesdelegpt_rrset_add_ns(struct delegpt* dp, struct regional* region, 384266114Sdes struct ub_packed_rrset_key* ns_rrset, uint8_t lame) 385238106Sdes{ 386238106Sdes struct packed_rrset_data* nsdata = (struct packed_rrset_data*) 387238106Sdes ns_rrset->entry.data; 388238106Sdes size_t i; 389238106Sdes log_assert(!dp->dp_type_mlc); 390238106Sdes if(nsdata->security == sec_status_bogus) 391238106Sdes dp->bogus = 1; 392238106Sdes for(i=0; i<nsdata->count; i++) { 393238106Sdes if(nsdata->rr_len[i] < 2+1) continue; /* len + root label */ 394238106Sdes if(dname_valid(nsdata->rr_data[i]+2, nsdata->rr_len[i]-2) != 395266114Sdes (size_t)sldns_read_uint16(nsdata->rr_data[i])) 396238106Sdes continue; /* bad format */ 397238106Sdes /* add rdata of NS (= wirefmt dname), skip rdatalen bytes */ 398238106Sdes if(!delegpt_add_ns(dp, region, nsdata->rr_data[i]+2, lame)) 399238106Sdes return 0; 400238106Sdes } 401238106Sdes return 1; 402238106Sdes} 403238106Sdes 404238106Sdesint 405238106Sdesdelegpt_add_rrset_A(struct delegpt* dp, struct regional* region, 406266114Sdes struct ub_packed_rrset_key* ak, uint8_t lame) 407238106Sdes{ 408238106Sdes struct packed_rrset_data* d=(struct packed_rrset_data*)ak->entry.data; 409238106Sdes size_t i; 410238106Sdes struct sockaddr_in sa; 411238106Sdes socklen_t len = (socklen_t)sizeof(sa); 412238106Sdes log_assert(!dp->dp_type_mlc); 413238106Sdes memset(&sa, 0, len); 414238106Sdes sa.sin_family = AF_INET; 415238106Sdes sa.sin_port = (in_port_t)htons(UNBOUND_DNS_PORT); 416238106Sdes for(i=0; i<d->count; i++) { 417238106Sdes if(d->rr_len[i] != 2 + INET_SIZE) 418238106Sdes continue; 419238106Sdes memmove(&sa.sin_addr, d->rr_data[i]+2, INET_SIZE); 420238106Sdes if(!delegpt_add_target(dp, region, ak->rk.dname, 421238106Sdes ak->rk.dname_len, (struct sockaddr_storage*)&sa, 422238106Sdes len, (d->security==sec_status_bogus), lame)) 423238106Sdes return 0; 424238106Sdes } 425238106Sdes return 1; 426238106Sdes} 427238106Sdes 428238106Sdesint 429238106Sdesdelegpt_add_rrset_AAAA(struct delegpt* dp, struct regional* region, 430266114Sdes struct ub_packed_rrset_key* ak, uint8_t lame) 431238106Sdes{ 432238106Sdes struct packed_rrset_data* d=(struct packed_rrset_data*)ak->entry.data; 433238106Sdes size_t i; 434238106Sdes struct sockaddr_in6 sa; 435238106Sdes socklen_t len = (socklen_t)sizeof(sa); 436238106Sdes log_assert(!dp->dp_type_mlc); 437238106Sdes memset(&sa, 0, len); 438238106Sdes sa.sin6_family = AF_INET6; 439238106Sdes sa.sin6_port = (in_port_t)htons(UNBOUND_DNS_PORT); 440238106Sdes for(i=0; i<d->count; i++) { 441238106Sdes if(d->rr_len[i] != 2 + INET6_SIZE) /* rdatalen + len of IP6 */ 442238106Sdes continue; 443238106Sdes memmove(&sa.sin6_addr, d->rr_data[i]+2, INET6_SIZE); 444238106Sdes if(!delegpt_add_target(dp, region, ak->rk.dname, 445238106Sdes ak->rk.dname_len, (struct sockaddr_storage*)&sa, 446238106Sdes len, (d->security==sec_status_bogus), lame)) 447238106Sdes return 0; 448238106Sdes } 449238106Sdes return 1; 450238106Sdes} 451238106Sdes 452238106Sdesint 453238106Sdesdelegpt_add_rrset(struct delegpt* dp, struct regional* region, 454266114Sdes struct ub_packed_rrset_key* rrset, uint8_t lame) 455238106Sdes{ 456238106Sdes if(!rrset) 457238106Sdes return 1; 458238106Sdes if(ntohs(rrset->rk.type) == LDNS_RR_TYPE_NS) 459238106Sdes return delegpt_rrset_add_ns(dp, region, rrset, lame); 460238106Sdes else if(ntohs(rrset->rk.type) == LDNS_RR_TYPE_A) 461238106Sdes return delegpt_add_rrset_A(dp, region, rrset, lame); 462238106Sdes else if(ntohs(rrset->rk.type) == LDNS_RR_TYPE_AAAA) 463238106Sdes return delegpt_add_rrset_AAAA(dp, region, rrset, lame); 464238106Sdes log_warn("Unknown rrset type added to delegpt"); 465238106Sdes return 1; 466238106Sdes} 467238106Sdes 468238106Sdesvoid delegpt_add_neg_msg(struct delegpt* dp, struct msgreply_entry* msg) 469238106Sdes{ 470238106Sdes struct reply_info* rep = (struct reply_info*)msg->entry.data; 471238106Sdes if(!rep) return; 472238106Sdes 473238106Sdes /* if error or no answers */ 474238106Sdes if(FLAGS_GET_RCODE(rep->flags) != 0 || rep->an_numrrsets == 0) { 475238106Sdes struct delegpt_ns* ns = delegpt_find_ns(dp, msg->key.qname, 476238106Sdes msg->key.qname_len); 477238106Sdes if(ns) { 478238106Sdes if(msg->key.qtype == LDNS_RR_TYPE_A) 479238106Sdes ns->got4 = 1; 480238106Sdes else if(msg->key.qtype == LDNS_RR_TYPE_AAAA) 481238106Sdes ns->got6 = 1; 482238106Sdes if(ns->got4 && ns->got6) 483238106Sdes ns->resolved = 1; 484238106Sdes } 485238106Sdes } 486238106Sdes} 487238106Sdes 488238106Sdesvoid delegpt_no_ipv6(struct delegpt* dp) 489238106Sdes{ 490238106Sdes struct delegpt_ns* ns; 491238106Sdes for(ns = dp->nslist; ns; ns = ns->next) { 492238106Sdes /* no ipv6, so only ipv4 is enough to resolve a nameserver */ 493238106Sdes if(ns->got4) 494238106Sdes ns->resolved = 1; 495238106Sdes } 496238106Sdes} 497238106Sdes 498238106Sdesvoid delegpt_no_ipv4(struct delegpt* dp) 499238106Sdes{ 500238106Sdes struct delegpt_ns* ns; 501238106Sdes for(ns = dp->nslist; ns; ns = ns->next) { 502238106Sdes /* no ipv4, so only ipv6 is enough to resolve a nameserver */ 503238106Sdes if(ns->got6) 504238106Sdes ns->resolved = 1; 505238106Sdes } 506238106Sdes} 507238106Sdes 508238106Sdesstruct delegpt* delegpt_create_mlc(uint8_t* name) 509238106Sdes{ 510238106Sdes struct delegpt* dp=(struct delegpt*)calloc(1, sizeof(*dp)); 511238106Sdes if(!dp) 512238106Sdes return NULL; 513238106Sdes dp->dp_type_mlc = 1; 514238106Sdes if(name) { 515238106Sdes dp->namelabs = dname_count_size_labels(name, &dp->namelen); 516238106Sdes dp->name = memdup(name, dp->namelen); 517238106Sdes if(!dp->name) { 518238106Sdes free(dp); 519238106Sdes return NULL; 520238106Sdes } 521238106Sdes } 522238106Sdes return dp; 523238106Sdes} 524238106Sdes 525238106Sdesvoid delegpt_free_mlc(struct delegpt* dp) 526238106Sdes{ 527238106Sdes struct delegpt_ns* n, *nn; 528238106Sdes struct delegpt_addr* a, *na; 529238106Sdes if(!dp) return; 530238106Sdes log_assert(dp->dp_type_mlc); 531238106Sdes n = dp->nslist; 532238106Sdes while(n) { 533238106Sdes nn = n->next; 534238106Sdes free(n->name); 535238106Sdes free(n); 536238106Sdes n = nn; 537238106Sdes } 538238106Sdes a = dp->target_list; 539238106Sdes while(a) { 540238106Sdes na = a->next_target; 541238106Sdes free(a); 542238106Sdes a = na; 543238106Sdes } 544238106Sdes free(dp->name); 545238106Sdes free(dp); 546238106Sdes} 547238106Sdes 548238106Sdesint delegpt_set_name_mlc(struct delegpt* dp, uint8_t* name) 549238106Sdes{ 550238106Sdes log_assert(dp->dp_type_mlc); 551238106Sdes dp->namelabs = dname_count_size_labels(name, &dp->namelen); 552238106Sdes dp->name = memdup(name, dp->namelen); 553238106Sdes return (dp->name != NULL); 554238106Sdes} 555238106Sdes 556266114Sdesint delegpt_add_ns_mlc(struct delegpt* dp, uint8_t* name, uint8_t lame) 557238106Sdes{ 558238106Sdes struct delegpt_ns* ns; 559238106Sdes size_t len; 560238106Sdes (void)dname_count_size_labels(name, &len); 561238106Sdes log_assert(dp->dp_type_mlc); 562238106Sdes /* slow check for duplicates to avoid counting failures when 563238106Sdes * adding the same server as a dependency twice */ 564238106Sdes if(delegpt_find_ns(dp, name, len)) 565238106Sdes return 1; 566238106Sdes ns = (struct delegpt_ns*)malloc(sizeof(struct delegpt_ns)); 567238106Sdes if(!ns) 568238106Sdes return 0; 569238106Sdes ns->namelen = len; 570238106Sdes ns->name = memdup(name, ns->namelen); 571238106Sdes if(!ns->name) { 572238106Sdes free(ns); 573238106Sdes return 0; 574238106Sdes } 575238106Sdes ns->next = dp->nslist; 576238106Sdes dp->nslist = ns; 577238106Sdes ns->resolved = 0; 578238106Sdes ns->got4 = 0; 579238106Sdes ns->got6 = 0; 580238106Sdes ns->lame = (uint8_t)lame; 581238106Sdes ns->done_pside4 = 0; 582238106Sdes ns->done_pside6 = 0; 583238106Sdes return 1; 584238106Sdes} 585238106Sdes 586238106Sdesint delegpt_add_addr_mlc(struct delegpt* dp, struct sockaddr_storage* addr, 587266114Sdes socklen_t addrlen, uint8_t bogus, uint8_t lame) 588238106Sdes{ 589238106Sdes struct delegpt_addr* a; 590238106Sdes log_assert(dp->dp_type_mlc); 591238106Sdes /* check for duplicates */ 592238106Sdes if((a = delegpt_find_addr(dp, addr, addrlen))) { 593238106Sdes if(bogus) 594238106Sdes a->bogus = bogus; 595238106Sdes if(!lame) 596238106Sdes a->lame = 0; 597238106Sdes return 1; 598238106Sdes } 599238106Sdes 600238106Sdes a = (struct delegpt_addr*)malloc(sizeof(struct delegpt_addr)); 601238106Sdes if(!a) 602238106Sdes return 0; 603238106Sdes a->next_target = dp->target_list; 604238106Sdes dp->target_list = a; 605238106Sdes a->next_result = 0; 606238106Sdes a->next_usable = dp->usable_list; 607238106Sdes dp->usable_list = a; 608238106Sdes memcpy(&a->addr, addr, addrlen); 609238106Sdes a->addrlen = addrlen; 610238106Sdes a->attempts = 0; 611238106Sdes a->bogus = bogus; 612238106Sdes a->lame = lame; 613266114Sdes a->dnsseclame = 0; 614238106Sdes return 1; 615238106Sdes} 616238106Sdes 617238106Sdesint delegpt_add_target_mlc(struct delegpt* dp, uint8_t* name, size_t namelen, 618266114Sdes struct sockaddr_storage* addr, socklen_t addrlen, uint8_t bogus, 619266114Sdes uint8_t lame) 620238106Sdes{ 621238106Sdes struct delegpt_ns* ns = delegpt_find_ns(dp, name, namelen); 622238106Sdes log_assert(dp->dp_type_mlc); 623238106Sdes if(!ns) { 624238106Sdes /* ignore it */ 625238106Sdes return 1; 626238106Sdes } 627238106Sdes if(!lame) { 628238106Sdes if(addr_is_ip6(addr, addrlen)) 629238106Sdes ns->got6 = 1; 630238106Sdes else ns->got4 = 1; 631238106Sdes if(ns->got4 && ns->got6) 632238106Sdes ns->resolved = 1; 633238106Sdes } 634238106Sdes return delegpt_add_addr_mlc(dp, addr, addrlen, bogus, lame); 635238106Sdes} 636238106Sdes 637238106Sdessize_t delegpt_get_mem(struct delegpt* dp) 638238106Sdes{ 639238106Sdes struct delegpt_ns* ns; 640238106Sdes size_t s; 641238106Sdes if(!dp) return 0; 642238106Sdes s = sizeof(*dp) + dp->namelen + 643238106Sdes delegpt_count_targets(dp)*sizeof(struct delegpt_addr); 644238106Sdes for(ns=dp->nslist; ns; ns=ns->next) 645238106Sdes s += sizeof(*ns)+ns->namelen; 646238106Sdes return s; 647238106Sdes} 648