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SUSE:SLE-15-SP2:GA
bind.34201
bind-CVE-2023-4408.patch
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File bind-CVE-2023-4408.patch of Package bind.34201
Index: bind-9.16.6/bin/plugins/filter-aaaa.c =================================================================== --- bind-9.16.6.orig/bin/plugins/filter-aaaa.c +++ bind-9.16.6/bin/plugins/filter-aaaa.c @@ -355,7 +355,7 @@ plugin_register(const char *parameters, } isc_mempool_create(mctx, sizeof(filter_data_t), &inst->datapool); - CHECK(isc_ht_init(&inst->ht, mctx, 16)); + CHECK(isc_ht_init(&inst->ht, mctx, 16, ISC_HT_CASE_SENSITIVE)); isc_mutex_init(&inst->hlock); /* Index: bind-9.16.6/lib/dns/catz.c =================================================================== --- bind-9.16.6.orig/lib/dns/catz.c +++ bind-9.16.6/lib/dns/catz.c @@ -399,12 +399,12 @@ dns_catz_zones_merge(dns_catz_zone_t *ta dns_name_format(&target->name, czname, DNS_NAME_FORMATSIZE); - result = isc_ht_init(&toadd, target->catzs->mctx, 16); + result = isc_ht_init(&toadd, target->catzs->mctx, 16, ISC_HT_CASE_SENSITIVE); if (result != ISC_R_SUCCESS) { goto cleanup; } - result = isc_ht_init(&tomod, target->catzs->mctx, 16); + result = isc_ht_init(&tomod, target->catzs->mctx, 16, ISC_HT_CASE_SENSITIVE); if (result != ISC_R_SUCCESS) { goto cleanup; } @@ -611,7 +611,7 @@ dns_catz_new_zones(dns_catz_zones_t **ca isc_refcount_init(&new_zones->refs, 1); - result = isc_ht_init(&new_zones->zones, mctx, 4); + result = isc_ht_init(&new_zones->zones, mctx, 4, ISC_HT_CASE_SENSITIVE); if (result != ISC_R_SUCCESS) { goto cleanup_refcount; } @@ -667,7 +667,7 @@ dns_catz_new_zone(dns_catz_zones_t *catz dns_name_init(&new_zone->name, NULL); dns_name_dup(name, catzs->mctx, &new_zone->name); - result = isc_ht_init(&new_zone->entries, catzs->mctx, 4); + result = isc_ht_init(&new_zone->entries, catzs->mctx, 4, ISC_HT_CASE_SENSITIVE); if (result != ISC_R_SUCCESS) { goto cleanup_name; } Index: bind-9.16.6/lib/dns/include/dns/message.h =================================================================== --- bind-9.16.6.orig/lib/dns/include/dns/message.h +++ bind-9.16.6/lib/dns/include/dns/message.h @@ -792,44 +792,6 @@ dns_message_findtype(const dns_name_t *n *\li #ISC_R_NOTFOUND -- the desired type does not exist. */ -isc_result_t -dns_message_find(const dns_name_t *name, dns_rdataclass_t rdclass, - dns_rdatatype_t type, dns_rdatatype_t covers, - dns_rdataset_t **rdataset); -/*%< - * Search the name for the specified rdclass and type. If it is found, - * *rdataset is filled in with a pointer to that rdataset. - * - * Requires: - *\li if '**rdataset' is non-NULL, *rdataset needs to be NULL. - * - *\li 'type' be a valid type, and NOT dns_rdatatype_any. - * - *\li If 'type' is dns_rdatatype_rrsig, 'covers' must be a valid type. - * Otherwise it should be 0. - * - * Returns: - *\li #ISC_R_SUCCESS -- all is well. - *\li #ISC_R_NOTFOUND -- the desired type does not exist. - */ - -void -dns_message_movename(dns_message_t *msg, dns_name_t *name, - dns_section_t fromsection, dns_section_t tosection); -/*%< - * Move a name from one section to another. - * - * Requires: - * - *\li 'msg' be valid. - * - *\li 'name' must be a name already in 'fromsection'. - * - *\li 'fromsection' must be a valid section. - * - *\li 'tosection' must be a valid section. - */ - void dns_message_addname(dns_message_t *msg, dns_name_t *name, dns_section_t section); Index: bind-9.16.6/lib/dns/include/dns/name.h =================================================================== --- bind-9.16.6.orig/lib/dns/include/dns/name.h +++ bind-9.16.6/lib/dns/include/dns/name.h @@ -67,6 +67,7 @@ #include <stdbool.h> #include <stdio.h> +#include <isc/ht.h> #include <isc/lang.h> #include <isc/magic.h> #include <isc/region.h> /* Required for storage size of dns_label_t. */ @@ -110,6 +111,7 @@ struct dns_name { isc_buffer_t * buffer; ISC_LINK(dns_name_t) link; ISC_LIST(dns_rdataset_t) list; + isc_ht_t *ht; }; #define DNS_NAME_MAGIC ISC_MAGIC('D', 'N', 'S', 'n') @@ -165,30 +167,24 @@ LIBDNS_EXTERNAL_DATA extern const dns_na * unsigned char offsets[] = { 0, 6 }; * dns_name_t value = DNS_NAME_INITABSOLUTE(data, offsets); */ -#define DNS_NAME_INITNONABSOLUTE(A, B) \ - { \ - DNS_NAME_MAGIC, A, (sizeof(A) - 1), sizeof(B), \ - DNS_NAMEATTR_READONLY, B, NULL, \ - { (void *)-1, (void *)-1 }, { \ - NULL, NULL \ - } \ +#define DNS_NAME_INITNONABSOLUTE(A, B) \ + { \ + DNS_NAME_MAGIC, A, (sizeof(A) - 1), sizeof(B), \ + DNS_NAMEATTR_READONLY, B, NULL, \ + { (void *)-1, (void *)-1 }, { NULL, NULL }, NULL \ } -#define DNS_NAME_INITABSOLUTE(A, B) \ - { \ - DNS_NAME_MAGIC, A, sizeof(A), sizeof(B), \ - DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE, B, \ - NULL, { (void *)-1, (void *)-1 }, { \ - NULL, NULL \ - } \ +#define DNS_NAME_INITABSOLUTE(A, B) \ + { \ + DNS_NAME_MAGIC, A, sizeof(A), sizeof(B), \ + DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE, B, \ + NULL, { (void *)-1, (void *)-1 }, { NULL, NULL }, NULL \ } -#define DNS_NAME_INITEMPTY \ - { \ - DNS_NAME_MAGIC, NULL, 0, 0, 0, NULL, NULL, \ - { (void *)-1, (void *)-1 }, { \ - NULL, NULL \ - } \ +#define DNS_NAME_INITEMPTY \ + { \ + DNS_NAME_MAGIC, NULL, 0, 0, 0, NULL, NULL, \ + { (void *)-1, (void *)-1 }, { NULL, NULL }, NULL \ } /*% @@ -1348,6 +1344,7 @@ ISC_LANG_ENDDECLS _n->buffer = NULL; \ ISC_LINK_INIT(_n, link); \ ISC_LIST_INIT(_n->list); \ + _n->ht = NULL; \ } while (0) #define DNS_NAME_RESET(n) \ Index: bind-9.16.6/lib/dns/message.c =================================================================== --- bind-9.16.6.orig/lib/dns/message.c +++ bind-9.16.6/lib/dns/message.c @@ -20,6 +20,8 @@ #include <stdbool.h> #include <isc/buffer.h> +#include <isc/hash.h> +#include <isc/ht.h> #include <isc/mem.h> #include <isc/print.h> #include <isc/string.h> /* Required for HP/UX (and others?) */ @@ -506,9 +508,11 @@ msgresetsigs(dns_message_t *msg, bool re } else { dns_rdataset_disassociate(msg->tsig); isc_mempool_put(msg->rdspool, msg->tsig); + msg->tsig = NULL; if (msg->querytsig != NULL) { dns_rdataset_disassociate(msg->querytsig); isc_mempool_put(msg->rdspool, msg->querytsig); + msg->querytsig = NULL; } } if (dns_name_dynamic(msg->tsigname)) { @@ -806,6 +810,18 @@ dns_message_destroy(dns_message_t **msgp } static isc_result_t +name_hash_add(isc_ht_t *ht, dns_name_t *name, dns_name_t **foundp) { + isc_result_t result = isc_ht_find(ht, name->ndata, name->length, + (void **)foundp); + if (result == ISC_R_SUCCESS) { + return (ISC_R_EXISTS); + } + result = isc_ht_add(ht, name->ndata, name->length, (void *)name); + INSIST(result == ISC_R_SUCCESS); + return (ISC_R_SUCCESS); +} + +static isc_result_t findname(dns_name_t **foundname, const dns_name_t *target, dns_namelist_t *section) { dns_name_t *curr; @@ -824,28 +840,26 @@ findname(dns_name_t **foundname, const d return (ISC_R_NOTFOUND); } -isc_result_t -dns_message_find(const dns_name_t *name, dns_rdataclass_t rdclass, - dns_rdatatype_t type, dns_rdatatype_t covers, - dns_rdataset_t **rdataset) { - dns_rdataset_t *curr; - - REQUIRE(name != NULL); - REQUIRE(rdataset == NULL || *rdataset == NULL); - - for (curr = ISC_LIST_TAIL(name->list); curr != NULL; - curr = ISC_LIST_PREV(curr, link)) - { - if (curr->rdclass == rdclass && curr->type == type && - curr->covers == covers) { - if (rdataset != NULL) { - *rdataset = curr; - } - return (ISC_R_SUCCESS); - } - } +typedef struct __attribute__((__packed__)) rds_key { + dns_rdataclass_t rdclass; + dns_rdatatype_t type; + dns_rdatatype_t covers; +} rds_key_t; - return (ISC_R_NOTFOUND); +static isc_result_t +rds_hash_add(isc_ht_t *ht, dns_rdataset_t *rds, dns_rdataset_t **foundp) { + rds_key_t key = { .rdclass = rds->rdclass, + .type = rds->type, + .covers = rds->covers }; + isc_result_t result = isc_ht_find(ht, (const unsigned char *)&key, + sizeof(key), (void **)foundp); + if (result == ISC_R_SUCCESS) { + return (ISC_R_EXISTS); + } + result = isc_ht_add(ht, (const unsigned char *)&key, sizeof(key), + (void *)rds); + INSIST(result == ISC_R_SUCCESS); + return (ISC_R_SUCCESS); } isc_result_t @@ -973,23 +987,41 @@ getrdata(isc_buffer_t *source, dns_messa } \ } while (0) +static void +cleanup_name_hashmaps(dns_namelist_t *section) { + dns_name_t *name = NULL; + for (name = ISC_LIST_HEAD(*section); name != NULL; + name = ISC_LIST_NEXT(name, link)) + { + if (name->ht != NULL) { + isc_ht_destroy(&name->ht); + } + } +} + static isc_result_t getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx, unsigned int options) { isc_region_t r; unsigned int count; - dns_name_t *name; - dns_name_t *name2; + dns_name_t *name = NULL; + dns_name_t *name2 = NULL; dns_offsets_t *offsets; dns_rdataset_t *rdataset; dns_rdatalist_t *rdatalist; - isc_result_t result; + isc_result_t result = ISC_R_SUCCESS; dns_rdatatype_t rdtype; dns_rdataclass_t rdclass; dns_namelist_t *section; - bool free_name; + bool free_name = false; + bool free_ht = false; bool best_effort; bool seen_problem; + isc_ht_t *name_map = NULL; + + if (msg->counts[DNS_SECTION_QUESTION] > 1) { + isc_ht_init(&name_map, msg->mctx, 1, ISC_HT_CASE_INSENSITIVE); + } section = &msg->sections[DNS_SECTION_QUESTION]; @@ -1024,13 +1056,19 @@ getquestions(isc_buffer_t *source, dns_m goto cleanup; } + /* If there is only one QNAME, skip the duplicity checks */ + if (name_map == NULL) { + result = ISC_R_SUCCESS; + goto skip_name_check; + } + /* * Run through the section, looking to see if this name * is already there. If it is found, put back the allocated * name since we no longer need it, and set our name pointer * to point to the name we found. */ - result = findname(&name2, name, section); + result = name_hash_add(name_map, name, &name2); /* * If it is the first name in the section, accept it. @@ -1042,19 +1080,25 @@ getquestions(isc_buffer_t *source, dns_m * this should be legal or not. In either case we no longer * need this name pointer. */ - if (result != ISC_R_SUCCESS) { + skip_name_check: + switch (result) { + case ISC_R_SUCCESS: if (!ISC_LIST_EMPTY(*section)) { DO_ERROR(DNS_R_FORMERR); } ISC_LIST_APPEND(*section, name, link); - free_name = false; - } else { + break; + case ISC_R_EXISTS: isc_mempool_put(msg->namepool, name); name = name2; name2 = NULL; - free_name = false; + break; + default: + ISC_UNREACHABLE(); } + free_name = false; + /* * Get type and class. */ @@ -1085,14 +1129,6 @@ getquestions(isc_buffer_t *source, dns_m } /* - * Can't ask the same question twice. - */ - result = dns_message_find(name, rdclass, rdtype, 0, NULL); - if (result == ISC_R_SUCCESS) { - DO_ERROR(DNS_R_FORMERR); - } - - /* * Allocate a new rdatalist. */ rdatalist = newrdatalist(msg); @@ -1105,6 +1141,7 @@ getquestions(isc_buffer_t *source, dns_m result = ISC_R_NOMEMORY; goto cleanup; } + dns_rdataset_init(rdataset); /* * Convert rdatalist to rdataset, and attach the latter to @@ -1113,26 +1150,57 @@ getquestions(isc_buffer_t *source, dns_m rdatalist->type = rdtype; rdatalist->rdclass = rdclass; - dns_rdataset_init(rdataset); result = dns_rdatalist_tordataset(rdatalist, rdataset); - if (result != ISC_R_SUCCESS) { - goto cleanup; - } + RUNTIME_CHECK(result == ISC_R_SUCCESS); rdataset->attributes |= DNS_RDATASETATTR_QUESTION; + /* + * Skip the duplicity check for first rdataset + */ + if (ISC_LIST_EMPTY(name->list)) { + result = ISC_R_SUCCESS; + goto skip_rds_check; + } + + /* + * Can't ask the same question twice. + */ + if (name->ht == NULL) { + isc_ht_init(&name->ht, msg->mctx, 1, + ISC_HT_CASE_SENSITIVE); + free_ht = true; + + INSIST(ISC_LIST_HEAD(name->list) == + ISC_LIST_TAIL(name->list)); + + dns_rdataset_t *old_rdataset = + ISC_LIST_HEAD(name->list); + + result = rds_hash_add(name->ht, old_rdataset, NULL); + + INSIST(result == ISC_R_SUCCESS); + } + result = rds_hash_add(name->ht, rdataset, NULL); + if (result == ISC_R_EXISTS) { + DO_ERROR(DNS_R_FORMERR); + } + + skip_rds_check: ISC_LIST_APPEND(name->list, rdataset, link); + rdataset = NULL; } if (seen_problem) { - return (DNS_R_RECOVERABLE); + result = DNS_R_RECOVERABLE; } - return (ISC_R_SUCCESS); cleanup: if (rdataset != NULL) { - INSIST(!dns_rdataset_isassociated(rdataset)); + if (dns_rdataset_isassociated(rdataset)) { + dns_rdataset_disassociate(rdataset); + } isc_mempool_put(msg->rdspool, rdataset); } #if 0 @@ -1144,6 +1212,14 @@ cleanup: isc_mempool_put(msg->namepool, name); } + if (free_ht) { + cleanup_name_hashmaps(section); + } + + if (name_map != NULL) { + isc_ht_destroy(&name_map); + } + return (result); } @@ -1223,17 +1299,24 @@ getsection(isc_buffer_t *source, dns_mes dns_name_t *name = NULL; dns_name_t *name2 = NULL; dns_offsets_t *offsets; - dns_rdataset_t *rdataset; + dns_rdataset_t *rdataset = NULL; + dns_rdataset_t *found_rdataset = NULL; dns_rdatalist_t *rdatalist; - isc_result_t result; + isc_result_t result = ISC_R_SUCCESS; dns_rdatatype_t rdtype, covers; dns_rdataclass_t rdclass; dns_rdata_t *rdata; dns_ttl_t ttl; dns_namelist_t *section; - bool free_name = false, free_rdataset = false; - bool preserve_order, best_effort, seen_problem; + bool free_name = false, seen_problem = false; + bool free_ht = false; + bool preserve_order, best_effort; bool isedns, issigzero, istsig; + isc_ht_t *name_map = NULL; + + if (msg->counts[sectionid] > 1) { + isc_ht_init(&name_map, msg->mctx, 1, ISC_HT_CASE_INSENSITIVE); + } preserve_order = ((options & DNS_MESSAGEPARSE_PRESERVEORDER) != 0); best_effort = ((options & DNS_MESSAGEPARSE_BESTEFFORT) != 0); @@ -1247,10 +1330,10 @@ getsection(isc_buffer_t *source, dns_mes skip_name_search = false; skip_type_search = false; - free_rdataset = false; isedns = false; issigzero = false; istsig = false; + found_rdataset = NULL; name = isc_mempool_get(msg->namepool); if (name == NULL) { @@ -1295,8 +1378,8 @@ getsection(isc_buffer_t *source, dns_mes if (msg->rdclass_set == 0 && rdtype != dns_rdatatype_opt && /* class is UDP SIZE */ rdtype != dns_rdatatype_tsig && /* class is ANY */ - rdtype != dns_rdatatype_tkey) - { /* class is undefined */ + rdtype != dns_rdatatype_tkey) /* class is undefined */ + { msg->rdclass = rdclass; msg->rdclass_set = 1; } @@ -1402,10 +1485,6 @@ getsection(isc_buffer_t *source, dns_mes * Then put the meta-class back into the finished rdata. */ rdata = newrdata(msg); - if (rdata == NULL) { - result = ISC_R_NOMEMORY; - goto cleanup; - } if (msg->opcode == dns_opcode_update && update(sectionid, rdclass)) { if (rdatalen != 0) { @@ -1488,33 +1567,71 @@ getsection(isc_buffer_t *source, dns_mes free_name = false; } } else { + if (name_map == NULL) { + result = ISC_R_SUCCESS; + goto skip_name_check; + } + /* * Run through the section, looking to see if this name * is already there. If it is found, put back the * allocated name since we no longer need it, and set * our name pointer to point to the name we found. */ - result = findname(&name2, name, section); + result = name_hash_add(name_map, name, &name2); /* * If it is a new name, append to the section. */ - if (result == ISC_R_SUCCESS) { + skip_name_check: + switch (result) { + case ISC_R_SUCCESS: + ISC_LIST_APPEND(*section, name, link); + break; + case ISC_R_EXISTS: isc_mempool_put(msg->namepool, name); name = name2; - } else { - ISC_LIST_APPEND(*section, name, link); + name2 = NULL; + break; + default: + ISC_UNREACHABLE(); } free_name = false; } + rdatalist = newrdatalist(msg); + if (rdatalist == NULL) { + result = ISC_R_NOMEMORY; + goto cleanup; + } + dns_message_gettemprdataset(msg, &rdataset); + if (rdataset == NULL) { + result = ISC_R_NOMEMORY; + goto cleanup; + } + + rdatalist->type = rdtype; + rdatalist->covers = covers; + rdatalist->rdclass = rdclass; + rdatalist->ttl = ttl; + + RUNTIME_CHECK(dns_rdatalist_tordataset(rdatalist, rdataset) == + ISC_R_SUCCESS); + dns_rdataset_setownercase(rdataset, name); + rdatalist = NULL; + /* * Search name for the particular type and class. * Skip this stage if in update mode or this is a meta-type. */ - if (preserve_order || msg->opcode == dns_opcode_update || - skip_type_search) { - result = ISC_R_NOTFOUND; + if (isedns || istsig || issigzero) { + /* Skip adding the rdataset to the tables */ + } else if (preserve_order || msg->opcode == dns_opcode_update || + skip_type_search) + { + result = ISC_R_SUCCESS; + + ISC_LIST_APPEND(name->list, rdataset, link); } else { /* * If this is a type that can only occur in @@ -1524,63 +1641,71 @@ getsection(isc_buffer_t *source, dns_mes DO_ERROR(DNS_R_FORMERR); } - rdataset = NULL; - result = dns_message_find(name, rdclass, rdtype, covers, - &rdataset); - } + if (ISC_LIST_EMPTY(name->list)) { + result = ISC_R_SUCCESS; + goto skip_rds_check; + } + + if (name->ht == NULL) { + isc_ht_init(&name->ht, msg->mctx, 1, + ISC_HT_CASE_SENSITIVE); + free_ht = true; + + INSIST(ISC_LIST_HEAD(name->list) == + ISC_LIST_TAIL(name->list)); + + dns_rdataset_t *old_rdataset = + ISC_LIST_HEAD(name->list); + + result = rds_hash_add(name->ht, old_rdataset, + NULL); + + INSIST(result == ISC_R_SUCCESS); + } + found_rdataset = NULL; + result = rds_hash_add(name->ht, rdataset, + &found_rdataset); + + /* + * If we found an rdataset that matches, we need to + * append this rdata to that set. If we did not, we + * need to create a new rdatalist, store the important + * bits there, convert it to an rdataset, and link the + * latter to the name. Yuck. When appending, make + * certain that the type isn't a singleton type, such as + * SOA or CNAME. + * + * Note that this check will be bypassed when preserving + * order, the opcode is an update, or the type search is + * skipped. + */ + skip_rds_check: + switch (result) { + case ISC_R_EXISTS: + /* Free the rdataset we used as the key */ + dns_rdataset_disassociate(rdataset); + isc_mempool_put(msg->rdspool, rdataset); + result = ISC_R_SUCCESS; + rdataset = found_rdataset; + + if (!dns_rdatatype_issingleton(rdtype)) { + break; + } - /* - * If we found an rdataset that matches, we need to - * append this rdata to that set. If we did not, we need - * to create a new rdatalist, store the important bits there, - * convert it to an rdataset, and link the latter to the name. - * Yuck. When appending, make certain that the type isn't - * a singleton type, such as SOA or CNAME. - * - * Note that this check will be bypassed when preserving order, - * the opcode is an update, or the type search is skipped. - */ - if (result == ISC_R_SUCCESS) { - if (dns_rdatatype_issingleton(rdtype)) { - dns_rdata_t *first; dns_rdatalist_fromrdataset(rdataset, &rdatalist); - first = ISC_LIST_HEAD(rdatalist->rdata); + dns_rdata_t *first = + ISC_LIST_HEAD(rdatalist->rdata); INSIST(first != NULL); if (dns_rdata_compare(rdata, first) != 0) { DO_ERROR(DNS_R_FORMERR); } - } - } - - if (result == ISC_R_NOTFOUND) { - rdataset = isc_mempool_get(msg->rdspool); - if (rdataset == NULL) { - result = ISC_R_NOMEMORY; - goto cleanup; - } - free_rdataset = true; - - rdatalist = newrdatalist(msg); - if (rdatalist == NULL) { - result = ISC_R_NOMEMORY; - goto cleanup; - } - - rdatalist->type = rdtype; - rdatalist->covers = covers; - rdatalist->rdclass = rdclass; - rdatalist->ttl = ttl; - - dns_rdataset_init(rdataset); - RUNTIME_CHECK( - dns_rdatalist_tordataset(rdatalist, rdataset) == - ISC_R_SUCCESS); - dns_rdataset_setownercase(rdataset, name); - - if (!isedns && !istsig && !issigzero) { + break; + case ISC_R_SUCCESS: ISC_LIST_APPEND(name->list, rdataset, link); - free_rdataset = false; + break; + default: + ISC_UNREACHABLE(); } } @@ -1615,8 +1740,6 @@ getsection(isc_buffer_t *source, dns_mes dns_rcode_t ercode; msg->opt = rdataset; - rdataset = NULL; - free_rdataset = false; ercode = (dns_rcode_t)( (msg->opt->ttl & DNS_MESSAGE_EDNSRCODE_MASK) >> 20); @@ -1627,8 +1750,6 @@ getsection(isc_buffer_t *source, dns_mes msg->sig0 = rdataset; msg->sig0name = name; msg->sigstart = recstart; - rdataset = NULL; - free_rdataset = false; free_name = false; } else if (istsig) { msg->tsig = rdataset; @@ -1638,22 +1759,17 @@ getsection(isc_buffer_t *source, dns_mes * Windows doesn't like TSIG names to be compressed. */ msg->tsigname->attributes |= DNS_NAMEATTR_NOCOMPRESS; - rdataset = NULL; - free_rdataset = false; free_name = false; } + rdataset = NULL; if (seen_problem) { if (free_name) { isc_mempool_put(msg->namepool, name); } - if (free_rdataset) { - isc_mempool_put(msg->rdspool, rdataset); - } - free_name = free_rdataset = false; + free_name = false; } INSIST(!free_name); - INSIST(!free_rdataset); } /* @@ -1671,16 +1787,24 @@ getsection(isc_buffer_t *source, dns_mes } if (seen_problem) { - return (DNS_R_RECOVERABLE); + result = DNS_R_RECOVERABLE; } - return (ISC_R_SUCCESS); cleanup: + if (rdataset != NULL && rdataset != found_rdataset) { + dns_rdataset_disassociate(rdataset); + isc_mempool_put(msg->rdspool, rdataset); + } if (free_name) { isc_mempool_put(msg->namepool, name); } - if (free_rdataset) { - isc_mempool_put(msg->rdspool, rdataset); + + if (free_ht) { + cleanup_name_hashmaps(section); + } + + if (name_map != NULL) { + isc_ht_destroy(&name_map); } return (result); @@ -2473,7 +2597,7 @@ dns_message_findname(dns_message_t *msg, const dns_name_t *target, dns_rdatatype_t type, dns_rdatatype_t covers, dns_name_t **name, dns_rdataset_t **rdataset) { - dns_name_t *foundname; + dns_name_t *foundname = NULL; isc_result_t result; /* @@ -2521,22 +2645,6 @@ dns_message_findname(dns_message_t *msg, } void -dns_message_movename(dns_message_t *msg, dns_name_t *name, - dns_section_t fromsection, dns_section_t tosection) { - REQUIRE(msg != NULL); - REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTRENDER); - REQUIRE(name != NULL); - REQUIRE(VALID_NAMED_SECTION(fromsection)); - REQUIRE(VALID_NAMED_SECTION(tosection)); - - /* - * Unlink the name from the old section - */ - ISC_LIST_UNLINK(msg->sections[fromsection], name, link); - ISC_LIST_APPEND(msg->sections[tosection], name, link); -} - -void dns_message_addname(dns_message_t *msg, dns_name_t *name, dns_section_t section) { REQUIRE(msg != NULL); @@ -2637,6 +2745,10 @@ dns_message_puttempname(dns_message_t *m REQUIRE(!ISC_LINK_LINKED(item, link)); REQUIRE(ISC_LIST_HEAD(item->list) == NULL); + if (item->ht != NULL) { + isc_ht_destroy(&item->ht); + } + if (dns_name_dynamic(item)) { dns_name_free(item, msg->mctx); } Index: bind-9.16.6/lib/dns/name.c =================================================================== --- bind-9.16.6.orig/lib/dns/name.c +++ bind-9.16.6/lib/dns/name.c @@ -186,6 +186,7 @@ dns_name_invalidate(dns_name_t *name) { name->offsets = NULL; name->buffer = NULL; ISC_LINK_INIT(name, link); + INSIST(name->ht == NULL); } bool Index: bind-9.16.6/lib/dns/rpz.c =================================================================== --- bind-9.16.6.orig/lib/dns/rpz.c +++ bind-9.16.6/lib/dns/rpz.c @@ -1546,7 +1546,7 @@ dns_rpz_new_zone(dns_rpz_zones_t *rpzs, * simplifies update_from_db */ - result = isc_ht_init(&zone->nodes, rpzs->mctx, 1); + result = isc_ht_init(&zone->nodes, rpzs->mctx, 1, ISC_HT_CASE_SENSITIVE); if (result != ISC_R_SUCCESS) { goto cleanup_ht; } @@ -1729,7 +1729,8 @@ setup_update(dns_rpz_zone_t *rpz) { ISC_LOG_DEBUG(1), "rpz: %s: using hashtable size %d", domain, hashsize); - result = isc_ht_init(&rpz->newnodes, rpz->rpzs->mctx, hashsize); + result = isc_ht_init(&rpz->newnodes, rpz->rpzs->mctx, hashsize, + ISC_HT_CASE_SENSITIVE); if (result != ISC_R_SUCCESS) { isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL, DNS_LOGMODULE_MASTER, ISC_LOG_ERROR, Index: bind-9.16.6/lib/dns/win32/libdns.def.in =================================================================== --- bind-9.16.6.orig/lib/dns/win32/libdns.def.in +++ bind-9.16.6/lib/dns/win32/libdns.def.in @@ -529,7 +529,6 @@ dns_message_checksig dns_message_create dns_message_currentname dns_message_destroy -dns_message_find dns_message_findname dns_message_findtype dns_message_firstname @@ -549,7 +548,6 @@ dns_message_gettsigkey dns_message_headertotext dns_message_logfmtpacket dns_message_logpacket -dns_message_movename dns_message_nextname dns_message_parse dns_message_peekheader Index: bind-9.16.6/lib/isc/ht.c =================================================================== --- bind-9.16.6.orig/lib/isc/ht.c +++ bind-9.16.6/lib/isc/ht.c @@ -25,51 +25,274 @@ typedef struct isc_ht_node isc_ht_node_t #define ISC_HT_MAGIC ISC_MAGIC('H', 'T', 'a', 'b') #define ISC_HT_VALID(ht) ISC_MAGIC_VALID(ht, ISC_HT_MAGIC) +#define HT_NO_BITS 0 +#define HT_MIN_BITS 1 +#define HT_MAX_BITS 32 +#define HT_OVERCOMMIT 3 + +#define HT_NEXTTABLE(idx) ((idx == 0) ? 1 : 0) +#define TRY_NEXTTABLE(idx, ht) (idx == ht->hindex && rehashing_in_progress(ht)) + +#define GOLDEN_RATIO_32 0x61C88647 + +#define HASHSIZE(bits) (UINT64_C(1) << (bits)) + struct isc_ht_node { void *value; isc_ht_node_t *next; + uint32_t hashval; size_t keysize; - unsigned char key[FLEXIBLE_ARRAY_MEMBER]; + unsigned char key[]; }; struct isc_ht { unsigned int magic; isc_mem_t *mctx; - size_t size; - size_t mask; - unsigned int count; - isc_ht_node_t **table; + size_t count; + bool case_sensitive; + size_t size[2]; + uint8_t hashbits[2]; + isc_ht_node_t **table[2]; + uint8_t hindex; + uint32_t hiter; /* rehashing iterator */ }; struct isc_ht_iter { isc_ht_t *ht; size_t i; + uint8_t hindex; isc_ht_node_t *cur; }; +static isc_ht_node_t * +isc__ht_find(const isc_ht_t *ht, const unsigned char *key, + const uint32_t keysize, const uint32_t hashval, const uint8_t idx); +static void +isc__ht_add(isc_ht_t *ht, const unsigned char *key, const uint32_t keysize, + const uint32_t hashval, const uint8_t idx, void *value); +static isc_result_t +isc__ht_delete(isc_ht_t *ht, const unsigned char *key, const uint32_t keysize, + const uint32_t hashval, const uint8_t idx); + +static uint32_t +rehash_bits(isc_ht_t *ht, size_t newcount); + +static void +hashtable_new(isc_ht_t *ht, const uint8_t idx, const uint8_t bits); +static void +hashtable_free(isc_ht_t *ht, const uint8_t idx); +static void +hashtable_rehash(isc_ht_t *ht, uint32_t newbits); +static void +hashtable_rehash_one(isc_ht_t *ht); +static void +maybe_rehash(isc_ht_t *ht, size_t newcount); + +static isc_result_t +isc__ht_iter_next(isc_ht_iter_t *it); + +static uint8_t maptolower[] = { + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, + 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, + 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, + 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, + 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, + 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, + 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, + 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, + 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, + 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, + 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, + 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, + 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, + 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, + 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, + 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, + 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe1, 0xe2, 0xe3, + 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, + 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, + 0xfc, 0xfd, 0xfe, 0xff +}; + +static int +memcasecmp(const void *vs1, const void *vs2, size_t len) { + uint8_t const *s1 = vs1; + uint8_t const *s2 = vs2; + for (size_t i = 0; i < len; i++) { + uint8_t u1 = s1[i]; + uint8_t u2 = s2[i]; + int U1 = maptolower[u1]; + int U2 = maptolower[u2]; + int diff = U1 - U2; + if (diff) { + return diff; + } + } + return 0; +} + +static bool +isc__ht_node_match(isc_ht_node_t *node, const uint32_t hashval, + const uint8_t *key, uint32_t keysize, bool case_sensitive) { + return (node->hashval == hashval && node->keysize == keysize && + (case_sensitive ? (memcmp(node->key, key, keysize) == 0) + : (memcasecmp(node->key, key, keysize) == 0))); +} + +static uint32_t +hash_32(uint32_t val, unsigned int bits) { + REQUIRE(bits <= HT_MAX_BITS); + /* High bits are more random. */ + return (val * GOLDEN_RATIO_32 >> (32 - bits)); +} + +static bool +rehashing_in_progress(const isc_ht_t *ht) { + return (ht->table[HT_NEXTTABLE(ht->hindex)] != NULL); +} + +static bool +hashtable_is_overcommited(isc_ht_t *ht) { + return (ht->count >= (ht->size[ht->hindex] * HT_OVERCOMMIT)); +} + +static uint32_t +rehash_bits(isc_ht_t *ht, size_t newcount) { + uint32_t newbits = ht->hashbits[ht->hindex]; + + while (newcount >= HASHSIZE(newbits) && newbits <= HT_MAX_BITS) { + newbits += 1; + } + + return (newbits); +} + +/* + * Rebuild the hashtable to reduce the load factor + */ +static void +hashtable_rehash(isc_ht_t *ht, uint32_t newbits) { + uint8_t oldindex = ht->hindex; + uint32_t oldbits = ht->hashbits[oldindex]; + uint8_t newindex = HT_NEXTTABLE(oldindex); + + REQUIRE(ht->hashbits[oldindex] >= HT_MIN_BITS); + REQUIRE(ht->hashbits[oldindex] <= HT_MAX_BITS); + REQUIRE(ht->table[oldindex] != NULL); + + REQUIRE(newbits <= HT_MAX_BITS); + REQUIRE(ht->hashbits[newindex] == HT_NO_BITS); + REQUIRE(ht->table[newindex] == NULL); + + REQUIRE(newbits > oldbits); + + hashtable_new(ht, newindex, newbits); + + ht->hindex = newindex; + + hashtable_rehash_one(ht); +} + +static void +hashtable_rehash_one(isc_ht_t *ht) { + isc_ht_node_t **newtable = ht->table[ht->hindex]; + uint32_t oldsize = ht->size[HT_NEXTTABLE(ht->hindex)]; + isc_ht_node_t **oldtable = ht->table[HT_NEXTTABLE(ht->hindex)]; + isc_ht_node_t *node = NULL; + isc_ht_node_t *nextnode; + + /* Find first non-empty node */ + while (ht->hiter < oldsize && oldtable[ht->hiter] == NULL) { + ht->hiter++; + } + + /* Rehashing complete */ + if (ht->hiter == oldsize) { + hashtable_free(ht, HT_NEXTTABLE(ht->hindex)); + ht->hiter = 0; + return; + } + + /* Move the first non-empty node from old hashtable to new hashtable */ + for (node = oldtable[ht->hiter]; node != NULL; node = nextnode) { + uint32_t hash = hash_32(node->hashval, + ht->hashbits[ht->hindex]); + nextnode = node->next; + node->next = newtable[hash]; + newtable[hash] = node; + } + + oldtable[ht->hiter] = NULL; + + ht->hiter++; +} + +static void +maybe_rehash(isc_ht_t *ht, size_t newcount) { + uint32_t newbits = rehash_bits(ht, newcount); + + if (ht->hashbits[ht->hindex] < newbits && newbits <= HT_MAX_BITS) { + hashtable_rehash(ht, newbits); + } +} + +static void +hashtable_new(isc_ht_t *ht, const uint8_t idx, const uint8_t bits) { + size_t size; + REQUIRE(ht->hashbits[idx] == HT_NO_BITS); + REQUIRE(ht->table[idx] == NULL); + REQUIRE(bits >= HT_MIN_BITS); + REQUIRE(bits <= HT_MAX_BITS); + + ht->hashbits[idx] = bits; + ht->size[idx] = HASHSIZE(ht->hashbits[idx]); + + size = ht->size[idx] * sizeof(isc_ht_node_t *); + + ht->table[idx] = isc_mem_get(ht->mctx, size); + memset(ht->table[idx], 0, size); +} + +static void +hashtable_free(isc_ht_t *ht, const uint8_t idx) { + size_t size = ht->size[idx] * sizeof(isc_ht_node_t *); + + for (size_t i = 0; i < ht->size[idx]; i++) { + isc_ht_node_t *node = ht->table[idx][i]; + while (node != NULL) { + isc_ht_node_t *next = node->next; + ht->count--; + isc_mem_put(ht->mctx, node, + sizeof(*node) + node->keysize); + node = next; + } + } + + isc_mem_put(ht->mctx, ht->table[idx], size); + ht->hashbits[idx] = HT_NO_BITS; + ht->table[idx] = NULL; +} + isc_result_t -isc_ht_init(isc_ht_t **htp, isc_mem_t *mctx, uint8_t bits) { +isc_ht_init(isc_ht_t **htp, isc_mem_t *mctx, uint8_t bits, + unsigned int options) { isc_ht_t *ht = NULL; - size_t i; + bool case_sensitive = ((options & ISC_HT_CASE_INSENSITIVE) == 0); REQUIRE(htp != NULL && *htp == NULL); REQUIRE(mctx != NULL); - REQUIRE(bits >= 1 && bits <= (sizeof(size_t) * 8 - 1)); + REQUIRE(bits >= 1 && bits <= HT_MAX_BITS); - ht = isc_mem_get(mctx, sizeof(struct isc_ht)); + ht = isc_mem_get(mctx, sizeof(*ht)); + *ht = (isc_ht_t){ + .case_sensitive = case_sensitive, + }; - ht->mctx = NULL; isc_mem_attach(mctx, &ht->mctx); - ht->size = ((size_t)1 << bits); - ht->mask = ((size_t)1 << bits) - 1; - ht->count = 0; - - ht->table = isc_mem_get(ht->mctx, ht->size * sizeof(isc_ht_node_t *)); - - for (i = 0; i < ht->size; i++) { - ht->table[i] = NULL; - } + hashtable_new(ht, 0, bits); ht->magic = ISC_HT_MAGIC; @@ -80,126 +303,188 @@ isc_ht_init(isc_ht_t **htp, isc_mem_t *m void isc_ht_destroy(isc_ht_t **htp) { isc_ht_t *ht; - size_t i; REQUIRE(htp != NULL); + REQUIRE(ISC_HT_VALID(*htp)); ht = *htp; *htp = NULL; - - REQUIRE(ISC_HT_VALID(ht)); - ht->magic = 0; - for (i = 0; i < ht->size; i++) { - isc_ht_node_t *node = ht->table[i]; - while (node != NULL) { - isc_ht_node_t *next = node->next; - ht->count--; - isc_mem_put(ht->mctx, node, - offsetof(isc_ht_node_t, key) + - node->keysize); - node = next; + for (size_t i = 0; i <= 1; i++) { + if (ht->table[i] != NULL) { + hashtable_free(ht, i); } } INSIST(ht->count == 0); - isc_mem_put(ht->mctx, ht->table, ht->size * sizeof(isc_ht_node_t *)); - isc_mem_putanddetach(&ht->mctx, ht, sizeof(struct isc_ht)); + isc_mem_putanddetach(&ht->mctx, ht, sizeof(*ht)); } -isc_result_t -isc_ht_add(isc_ht_t *ht, const unsigned char *key, uint32_t keysize, - void *value) { +static void +isc__ht_add(isc_ht_t *ht, const unsigned char *key, const uint32_t keysize, + const uint32_t hashval, const uint8_t idx, void *value) { isc_ht_node_t *node; uint32_t hash; + hash = hash_32(hashval, ht->hashbits[idx]); + + node = isc_mem_get(ht->mctx, sizeof(*node) + keysize); + *node = (isc_ht_node_t){ + .keysize = keysize, + .hashval = hashval, + .next = ht->table[idx][hash], + .value = value, + }; + + memmove(node->key, key, keysize); + + ht->count++; + ht->table[idx][hash] = node; +} + +isc_result_t +isc_ht_add(isc_ht_t *ht, const unsigned char *key, const uint32_t keysize, + void *value) { + uint32_t hashval; + REQUIRE(ISC_HT_VALID(ht)); REQUIRE(key != NULL && keysize > 0); - hash = isc_hash_function(key, keysize, true); - node = ht->table[hash & ht->mask]; - while (node != NULL) { - if (keysize == node->keysize && - memcmp(key, node->key, keysize) == 0) { - return (ISC_R_EXISTS); - } - node = node->next; + if (rehashing_in_progress(ht)) { + /* Rehash in progress */ + hashtable_rehash_one(ht); + } else if (hashtable_is_overcommited(ht)) { + /* Rehash requested */ + maybe_rehash(ht, ht->count); } - node = isc_mem_get(ht->mctx, offsetof(isc_ht_node_t, key) + keysize); + hashval = isc_hash32(key, keysize, ht->case_sensitive); - memmove(node->key, key, keysize); - node->keysize = keysize; - node->next = ht->table[hash & ht->mask]; - node->value = value; + if (isc__ht_find(ht, key, keysize, hashval, ht->hindex) != NULL) { + return (ISC_R_EXISTS); + } + + isc__ht_add(ht, key, keysize, hashval, ht->hindex, value); - ht->count++; - ht->table[hash & ht->mask] = node; return (ISC_R_SUCCESS); } +static isc_ht_node_t * +isc__ht_find(const isc_ht_t *ht, const unsigned char *key, + const uint32_t keysize, const uint32_t hashval, + const uint8_t idx) { + uint32_t hash; + uint8_t findex = idx; + +nexttable: + hash = hash_32(hashval, ht->hashbits[findex]); + for (isc_ht_node_t *node = ht->table[findex][hash]; node != NULL; + node = node->next) + { + if (isc__ht_node_match(node, hashval, key, keysize, + ht->case_sensitive)) + { + return (node); + } + } + if (TRY_NEXTTABLE(findex, ht)) { + /* + * Rehashing in progress, check the other table + */ + findex = HT_NEXTTABLE(findex); + goto nexttable; + } + + return (NULL); +} + + isc_result_t -isc_ht_find(const isc_ht_t *ht, const unsigned char *key, uint32_t keysize, - void **valuep) { +isc_ht_find(const isc_ht_t *ht, const unsigned char *key, + const uint32_t keysize, void **valuep) { + uint32_t hashval; isc_ht_node_t *node; - uint32_t hash; REQUIRE(ISC_HT_VALID(ht)); REQUIRE(key != NULL && keysize > 0); REQUIRE(valuep == NULL || *valuep == NULL); - hash = isc_hash_function(key, keysize, true); - node = ht->table[hash & ht->mask]; - while (node != NULL) { - if (keysize == node->keysize && - memcmp(key, node->key, keysize) == 0) { - if (valuep != NULL) { - *valuep = node->value; - } - return (ISC_R_SUCCESS); - } - node = node->next; + hashval = isc_hash32(key, keysize, ht->case_sensitive); + + node = isc__ht_find(ht, key, keysize, hashval, ht->hindex); + if (node == NULL) { + return (ISC_R_NOTFOUND); } - return (ISC_R_NOTFOUND); + if (valuep != NULL) { + *valuep = node->value; + } + return (ISC_R_SUCCESS); } -isc_result_t -isc_ht_delete(isc_ht_t *ht, const unsigned char *key, uint32_t keysize) { - isc_ht_node_t *node, *prev; +static isc_result_t +isc__ht_delete(isc_ht_t *ht, const unsigned char *key, const uint32_t keysize, + const uint32_t hashval, const uint8_t idx) { + isc_ht_node_t *prev = NULL; uint32_t hash; - REQUIRE(ISC_HT_VALID(ht)); - REQUIRE(key != NULL && keysize > 0); + hash = hash_32(hashval, ht->hashbits[idx]); - prev = NULL; - hash = isc_hash_function(key, keysize, true); - node = ht->table[hash & ht->mask]; - while (node != NULL) { - if (keysize == node->keysize && - memcmp(key, node->key, keysize) == 0) { + for (isc_ht_node_t *node = ht->table[idx][hash]; node != NULL; + prev = node, node = node->next) + { + if (isc__ht_node_match(node, hashval, key, keysize, + ht->case_sensitive)) + { if (prev == NULL) { - ht->table[hash & ht->mask] = node->next; + ht->table[idx][hash] = node->next; } else { prev->next = node->next; } isc_mem_put(ht->mctx, node, - offsetof(isc_ht_node_t, key) + - node->keysize); + sizeof(*node) + node->keysize); ht->count--; return (ISC_R_SUCCESS); } - - prev = node; - node = node->next; } + return (ISC_R_NOTFOUND); } isc_result_t +isc_ht_delete(isc_ht_t *ht, const unsigned char *key, const uint32_t keysize) { + uint32_t hashval; + uint8_t hindex; + isc_result_t result; + + REQUIRE(ISC_HT_VALID(ht)); + REQUIRE(key != NULL && keysize > 0); + + if (rehashing_in_progress(ht)) { + /* Rehash in progress */ + hashtable_rehash_one(ht); + } + + hindex = ht->hindex; + hashval = isc_hash32(key, keysize, ht->case_sensitive); +nexttable: + result = isc__ht_delete(ht, key, keysize, hashval, hindex); + + if (result == ISC_R_NOTFOUND && TRY_NEXTTABLE(hindex, ht)) { + /* + * Rehashing in progress, check the other table + */ + hindex = HT_NEXTTABLE(hindex); + goto nexttable; + } + + return (result); +} + +isc_result_t isc_ht_iter_create(isc_ht_t *ht, isc_ht_iter_t **itp) { isc_ht_iter_t *it; @@ -207,10 +492,10 @@ isc_ht_iter_create(isc_ht_t *ht, isc_ht_ REQUIRE(itp != NULL && *itp == NULL); it = isc_mem_get(ht->mctx, sizeof(isc_ht_iter_t)); - - it->ht = ht; - it->i = 0; - it->cur = NULL; + *it = (isc_ht_iter_t){ + .ht = ht, + .hindex = ht->hindex, + }; *itp = it; @@ -227,25 +512,46 @@ isc_ht_iter_destroy(isc_ht_iter_t **itp) it = *itp; *itp = NULL; ht = it->ht; - isc_mem_put(ht->mctx, it, sizeof(isc_ht_iter_t)); + isc_mem_put(ht->mctx, it, sizeof(*it)); } isc_result_t isc_ht_iter_first(isc_ht_iter_t *it) { + isc_ht_t *ht; + REQUIRE(it != NULL); + ht = it->ht; + + it->hindex = ht->hindex; it->i = 0; - while (it->i < it->ht->size && it->ht->table[it->i] == NULL) { + + return (isc__ht_iter_next(it)); +} + +static isc_result_t +isc__ht_iter_next(isc_ht_iter_t *it) { + isc_ht_t *ht = it->ht; + + while (it->i < ht->size[it->hindex] && + ht->table[it->hindex][it->i] == NULL) + { it->i++; } - if (it->i == it->ht->size) { - return (ISC_R_NOMORE); + if (it->i < ht->size[it->hindex]) { + it->cur = ht->table[it->hindex][it->i]; + + return (ISC_R_SUCCESS); } - it->cur = it->ht->table[it->i]; + if (TRY_NEXTTABLE(it->hindex, ht)) { + it->hindex = HT_NEXTTABLE(it->hindex); + it->i = 0; + return (isc__ht_iter_next(it)); + } - return (ISC_R_SUCCESS); + return (ISC_R_NOMORE); } isc_result_t @@ -254,60 +560,36 @@ isc_ht_iter_next(isc_ht_iter_t *it) { REQUIRE(it->cur != NULL); it->cur = it->cur->next; - if (it->cur == NULL) { - do { - it->i++; - } while (it->i < it->ht->size && it->ht->table[it->i] == NULL); - if (it->i >= it->ht->size) { - return (ISC_R_NOMORE); - } - it->cur = it->ht->table[it->i]; + + if (it->cur != NULL) { + return (ISC_R_SUCCESS); } - return (ISC_R_SUCCESS); + it->i++; + + return (isc__ht_iter_next(it)); } isc_result_t isc_ht_iter_delcurrent_next(isc_ht_iter_t *it) { isc_result_t result = ISC_R_SUCCESS; - isc_ht_node_t *to_delete = NULL; - isc_ht_node_t *prev = NULL; - isc_ht_node_t *node = NULL; - uint32_t hash; + isc_ht_node_t *dnode = NULL; + uint8_t dindex; isc_ht_t *ht; + isc_result_t dresult; + REQUIRE(it != NULL); REQUIRE(it->cur != NULL); - to_delete = it->cur; + ht = it->ht; + dnode = it->cur; + dindex = it->hindex; - it->cur = it->cur->next; - if (it->cur == NULL) { - do { - it->i++; - } while (it->i < ht->size && ht->table[it->i] == NULL); - if (it->i >= ht->size) { - result = ISC_R_NOMORE; - } else { - it->cur = ht->table[it->i]; - } - } + result = isc_ht_iter_next(it); - hash = isc_hash_function(to_delete->key, to_delete->keysize, true); - node = ht->table[hash & ht->mask]; - while (node != to_delete) { - prev = node; - node = node->next; - INSIST(node != NULL); - } - - if (prev == NULL) { - ht->table[hash & ht->mask] = node->next; - } else { - prev->next = node->next; - } - isc_mem_put(ht->mctx, node, - offsetof(isc_ht_node_t, key) + node->keysize); - ht->count--; + dresult = isc__ht_delete(ht, dnode->key, dnode->keysize, dnode->hashval, + dindex); + INSIST(dresult == ISC_R_SUCCESS); return (result); } @@ -332,8 +614,8 @@ isc_ht_iter_currentkey(isc_ht_iter_t *it *keysize = it->cur->keysize; } -unsigned int -isc_ht_count(isc_ht_t *ht) { +size_t +isc_ht_count(const isc_ht_t *ht) { REQUIRE(ISC_HT_VALID(ht)); return (ht->count); Index: bind-9.16.6/lib/isc/include/isc/ht.h =================================================================== --- bind-9.16.6.orig/lib/isc/include/isc/ht.h +++ bind-9.16.6/lib/isc/include/isc/ht.h @@ -11,8 +11,7 @@ /* ! \file */ -#ifndef ISC_HT_H -#define ISC_HT_H 1 +#pragma once #include <inttypes.h> #include <string.h> @@ -23,9 +22,15 @@ typedef struct isc_ht isc_ht_t; typedef struct isc_ht_iter isc_ht_iter_t; +enum { ISC_HT_CASE_SENSITIVE = 0x00, ISC_HT_CASE_INSENSITIVE = 0x01 }; + /*% * Initialize hashtable at *htp, using memory context and size of (1<<bits) * + * If 'options' contains ISC_HT_CASE_INSENSITIVE, then upper- and lower-case + * letters in key values will generate the same hash values; this can be used + * when the key for a hash table is a DNS name. + * * Requires: *\li 'htp' is not NULL and '*htp' is NULL. *\li 'mctx' is a valid memory context. @@ -36,7 +41,8 @@ typedef struct isc_ht_iter isc_ht_iter_t *\li #ISC_R_SUCCESS -- all is well. */ isc_result_t -isc_ht_init(isc_ht_t **htp, isc_mem_t *mctx, uint8_t bits); +isc_ht_init(isc_ht_t **htp, isc_mem_t *mctx, uint8_t bits, + unsigned int options); /*% * Destroy hashtable, freeing everything @@ -53,6 +59,7 @@ isc_ht_destroy(isc_ht_t **htp); * * Requires: *\li 'ht' is a valid hashtable + *\li write-lock * * Returns: *\li #ISC_R_NOMEMORY -- not enough memory to create pool @@ -60,7 +67,7 @@ isc_ht_destroy(isc_ht_t **htp); *\li #ISC_R_SUCCESS -- all is well. */ isc_result_t -isc_ht_add(isc_ht_t *ht, const unsigned char *key, uint32_t keysize, +isc_ht_add(isc_ht_t *ht, const unsigned char *key, const uint32_t keysize, void *value); /*% @@ -71,27 +78,29 @@ isc_ht_add(isc_ht_t *ht, const unsigned * * Requires: * \li 'ht' is a valid hashtable + * \li read-lock * * Returns: * \li #ISC_R_SUCCESS -- success * \li #ISC_R_NOTFOUND -- key not found */ isc_result_t -isc_ht_find(const isc_ht_t *ht, const unsigned char *key, uint32_t keysize, - void **valuep); +isc_ht_find(const isc_ht_t *ht, const unsigned char *key, + const uint32_t keysize, void **valuep); /*% * Delete node from hashtable * * Requires: *\li ht is a valid hashtable + *\li write-lock * * Returns: *\li #ISC_R_NOTFOUND -- key not found *\li #ISC_R_SUCCESS -- all is well */ isc_result_t -isc_ht_delete(isc_ht_t *ht, const unsigned char *key, uint32_t keysize); +isc_ht_delete(isc_ht_t *ht, const unsigned char *key, const uint32_t keysize); /*% * Create an iterator for the hashtable; point '*itp' to it. @@ -179,6 +188,5 @@ isc_ht_iter_currentkey(isc_ht_iter_t *it * Requires: *\li 'ht' is a valid hashtable */ -unsigned int -isc_ht_count(isc_ht_t *ht); -#endif /* ifndef ISC_HT_H */ +size_t +isc_ht_count(const isc_ht_t *ht); Index: bind-9.16.6/lib/isc/tests/ht_test.c =================================================================== --- bind-9.16.6.orig/lib/isc/tests/ht_test.c +++ bind-9.16.6/lib/isc/tests/ht_test.c @@ -59,7 +59,7 @@ test_ht_full(int bits, uintptr_t count) isc_result_t result; uintptr_t i; - result = isc_ht_init(&ht, test_mctx, bits); + result = isc_ht_init(&ht, test_mctx, bits, ISC_HT_CASE_SENSITIVE); assert_int_equal(result, ISC_R_SUCCESS); assert_non_null(ht); @@ -205,7 +205,7 @@ test_ht_iterator() { unsigned char key[16]; size_t tksize; - result = isc_ht_init(&ht, test_mctx, 16); + result = isc_ht_init(&ht, test_mctx, 16, ISC_HT_CASE_SENSITIVE); assert_int_equal(result, ISC_R_SUCCESS); assert_non_null(ht); for (i = 1; i <= count; i++) {
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