packages/bind
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
bind/backport-CVE-2023-4408.patch

902 lines
28 KiB
Diff
Raw Normal View History

fix CVE-2023-4408 CVE-2023-5517 CVE-2023-5679 CVE-2023-50387 CVE-2023-50868 (cherry picked from commit ab8deb433bf4516aeaf7fa5e386c6d91766c8cfe)
2024-03-19 11:13:54 +08:00
From 608707b4f5b473e416563bfe0d43e26d6dc4a5c6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@isc.org>
Date: Mon, 11 Sep 2023 10:35:28 +0200
Subject: [PATCH] Use hashtable when parsing a message
When parsing messages use a hashtable instead of a linear search to
reduce the amount of work done in findname when there's more than one
name in the section.
There are two hashtables:
1) hashtable for owner names - that's constructed for each section when
we hit the second name in the section and destroyed right after parsing
that section;
2) per-name hashtable - for each name in the section, we construct a new
hashtable for that name if there are more than one rdataset for that
particular name.
Conflict:NA
Reference:https://downloads.isc.org/isc/bind/9.18.24/patches/0001-CVE-2023-4408.patch
(cherry picked from commit b8a96317544c7b310b4f74360825a87b6402ddc2)
---
lib/dns/include/dns/message.h | 38 ----
lib/dns/include/dns/name.h | 37 ++--
lib/dns/message.c | 374 ++++++++++++++++++++++------------
lib/dns/name.c | 1 +
lib/isc/ht.c | 55 ++++-
5 files changed, 309 insertions(+), 196 deletions(-)
diff --git a/lib/dns/include/dns/message.h b/lib/dns/include/dns/message.h
index 940c9b1..f15884a 100644
--- a/lib/dns/include/dns/message.h
+++ b/lib/dns/include/dns/message.h
@@ -856,44 +856,6 @@ dns_message_findtype(const dns_name_t *name, dns_rdatatype_t type,
*\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);
diff --git a/lib/dns/include/dns/name.h b/lib/dns/include/dns/name.h
index a758c4d..199856a 100644
--- a/lib/dns/include/dns/name.h
+++ b/lib/dns/include/dns/name.h
@@ -68,6 +68,7 @@
#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. */
@@ -111,6 +112,7 @@ 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')
@@ -166,30 +168,24 @@ extern const dns_name_t *dns_wildcardname;
* 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 \
}
/*%
@@ -1330,6 +1326,7 @@ 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) \
diff --git a/lib/dns/message.c b/lib/dns/message.c
index 761a8e1..8654e92 100644
--- a/lib/dns/message.c
+++ b/lib/dns/message.c
@@ -22,6 +22,8 @@
#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/result.h>
@@ -493,9 +495,11 @@ msgresetsigs(dns_message_t *msg, bool replying) {
} 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;
}
}
dns_message_puttempname(msg, &msg->tsigname);
@@ -790,6 +794,18 @@ dns_message_detach(dns_message_t **messagep) {
}
}
+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) {
@@ -809,29 +825,26 @@ findname(dns_name_t **foundname, const dns_name_t *target,
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
@@ -958,6 +971,18 @@ getrdata(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
} \
} 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) {
@@ -967,13 +992,19 @@ getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
dns_name_t *name2 = NULL;
dns_rdataset_t *rdataset = NULL;
dns_rdatalist_t *rdatalist = NULL;
- isc_result_t result;
+ isc_result_t result = ISC_R_SUCCESS;
dns_rdatatype_t rdtype;
dns_rdataclass_t rdclass;
dns_namelist_t *section = &msg->sections[DNS_SECTION_QUESTION];
bool best_effort = ((options & DNS_MESSAGEPARSE_BESTEFFORT) != 0);
bool seen_problem = false;
bool free_name = false;
+ bool free_ht = false;
+ 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);
+ }
for (count = 0; count < msg->counts[DNS_SECTION_QUESTION]; count++) {
name = NULL;
@@ -994,13 +1025,19 @@ getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
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.
@@ -1012,19 +1049,25 @@ getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
* 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:
dns_message_puttempname(msg, &name);
name = name2;
name2 = NULL;
- free_name = false;
+ break;
+ default:
+ UNREACHABLE();
}
+ free_name = false;
+
/*
* Get type and class.
*/
@@ -1054,14 +1097,6 @@ getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
msg->tkey = 1;
}
- /*
- * 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.
*/
@@ -1071,6 +1106,7 @@ getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
goto cleanup;
}
rdataset = isc_mempool_get(msg->rdspool);
+ dns_rdataset_init(rdataset);
/*
* Convert rdatalist to rdataset, and attach the latter to
@@ -1078,8 +1114,6 @@ getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
*/
rdatalist->type = rdtype;
rdatalist->rdclass = rdclass;
-
- dns_rdataset_init(rdataset);
result = dns_rdatalist_tordataset(rdatalist, rdataset);
if (result != ISC_R_SUCCESS) {
goto cleanup;
@@ -1087,24 +1121,66 @@ getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
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 (free_name) {
dns_message_puttempname(msg, &name);
}
+ if (free_ht) {
+ cleanup_name_hashmaps(section);
+ }
+
+ if (name_map != NULL) {
+ isc_ht_destroy(&name_map);
+ }
+
return (result);
}
@@ -1184,17 +1260,24 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
dns_name_t *name = NULL;
dns_name_t *name2 = NULL;
dns_rdataset_t *rdataset = NULL;
+ dns_rdataset_t *found_rdataset = NULL;
dns_rdatalist_t *rdatalist = NULL;
- isc_result_t result;
+ isc_result_t result = ISC_R_SUCCESS;
dns_rdatatype_t rdtype, covers;
dns_rdataclass_t rdclass;
dns_rdata_t *rdata = NULL;
dns_ttl_t ttl;
dns_namelist_t *section = &msg->sections[sectionid];
- bool free_name = false, free_rdataset = false, seen_problem = false;
+ bool free_name = false, seen_problem = false;
+ bool free_ht = false;
bool preserve_order = ((options & DNS_MESSAGEPARSE_PRESERVEORDER) != 0);
bool best_effort = ((options & DNS_MESSAGEPARSE_BESTEFFORT) != 0);
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);
+ }
for (count = 0; count < msg->counts[sectionid]; count++) {
int recstart = source->current;
@@ -1202,10 +1285,10 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
skip_name_search = false;
skip_type_search = false;
- free_rdataset = false;
isedns = false;
issigzero = false;
istsig = false;
+ found_rdataset = NULL;
name = NULL;
result = dns_message_gettempname(msg, &name);
@@ -1245,8 +1328,8 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
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;
}
@@ -1353,10 +1436,6 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
* 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))
{
@@ -1445,34 +1524,62 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
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:
dns_message_puttempname(msg, &name);
name = name2;
- } else {
- ISC_LIST_APPEND(*section, name, link);
+ name2 = NULL;
+ break;
+ default:
+ UNREACHABLE();
}
free_name = false;
}
+ rdatalist = newrdatalist(msg);
+ rdatalist->type = rdtype;
+ rdatalist->covers = covers;
+ rdatalist->rdclass = rdclass;
+ rdatalist->ttl = ttl;
+
+ dns_message_gettemprdataset(msg, &rdataset);
+ 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)
+ 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_NOTFOUND;
+ result = ISC_R_SUCCESS;
+
+ ISC_LIST_APPEND(name->list, rdataset, link);
} else {
/*
* If this is a type that can only occur in
@@ -1482,59 +1589,71 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
DO_ERROR(DNS_R_FORMERR);
}
- rdataset = NULL;
- result = dns_message_find(name, rdclass, rdtype, covers,
- &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.
- */
- 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);
- INSIST(first != NULL);
- if (dns_rdata_compare(rdata, first) != 0) {
- DO_ERROR(DNS_R_FORMERR);
- }
+ if (ISC_LIST_EMPTY(name->list)) {
+ result = ISC_R_SUCCESS;
+ goto skip_rds_check;
}
- }
- if (result == ISC_R_NOTFOUND) {
- rdataset = isc_mempool_get(msg->rdspool);
- free_rdataset = true;
+ if (name->ht == NULL) {
+ isc_ht_init(&name->ht, msg->mctx, 1,
+ ISC_HT_CASE_SENSITIVE);
+ free_ht = true;
- rdatalist = newrdatalist(msg);
- if (rdatalist == NULL) {
- result = ISC_R_NOMEMORY;
- goto cleanup;
+ 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);
- rdatalist->type = rdtype;
- rdatalist->covers = covers;
- rdatalist->rdclass = rdclass;
- rdatalist->ttl = ttl;
+ /*
+ * 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;
- dns_rdataset_init(rdataset);
- RUNTIME_CHECK(
- dns_rdatalist_tordataset(rdatalist, rdataset) ==
- ISC_R_SUCCESS);
- dns_rdataset_setownercase(rdataset, name);
+ if (!dns_rdatatype_issingleton(rdtype)) {
+ break;
+ }
- if (!isedns && !istsig && !issigzero) {
+ dns_rdatalist_fromrdataset(rdataset,
+ &rdatalist);
+ dns_rdata_t *first =
+ ISC_LIST_HEAD(rdatalist->rdata);
+ INSIST(first != NULL);
+ if (dns_rdata_compare(rdata, first) != 0) {
+ DO_ERROR(DNS_R_FORMERR);
+ }
+ break;
+ case ISC_R_SUCCESS:
ISC_LIST_APPEND(name->list, rdataset, link);
- free_rdataset = false;
+ break;
+ default:
+ UNREACHABLE();
}
}
@@ -1569,8 +1688,6 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
dns_rcode_t ercode;
msg->opt = rdataset;
- rdataset = NULL;
- free_rdataset = false;
ercode = (dns_rcode_t)((msg->opt->ttl &
DNS_MESSAGE_EDNSRCODE_MASK) >>
20);
@@ -1581,8 +1698,6 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
msg->sig0 = rdataset;
msg->sig0name = name;
msg->sigstart = recstart;
- rdataset = NULL;
- free_rdataset = false;
free_name = false;
} else if (istsig) {
msg->tsig = rdataset;
@@ -1592,22 +1707,17 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
* 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) {
dns_message_puttempname(msg, &name);
}
- if (free_rdataset) {
- isc_mempool_put(msg->rdspool, rdataset);
- }
- free_name = free_rdataset = false;
+ free_name = false;
}
INSIST(!free_name);
- INSIST(!free_rdataset);
}
/*
@@ -1625,16 +1735,24 @@ getsection(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx,
}
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) {
dns_message_puttempname(msg, &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);
@@ -2452,7 +2570,7 @@ dns_message_findname(dns_message_t *msg, dns_section_t section,
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;
/*
@@ -2499,22 +2617,6 @@ dns_message_findname(dns_message_t *msg, dns_section_t section,
return (result);
}
-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) {
@@ -2591,6 +2693,10 @@ dns_message_puttempname(dns_message_t *msg, dns_name_t **itemp) {
REQUIRE(!ISC_LINK_LINKED(item, link));
REQUIRE(ISC_LIST_HEAD(item->list) == NULL);
+ if (item->ht != NULL) {
+ isc_ht_destroy(&item->ht);
+ }
+
/*
* we need to check this in case dns_name_dup() was used.
*/
diff --git a/lib/dns/name.c b/lib/dns/name.c
index 8a258a2..90044ba 100644
--- a/lib/dns/name.c
+++ b/lib/dns/name.c
@@ -188,6 +188,7 @@ dns_name_invalidate(dns_name_t *name) {
name->offsets = NULL;
name->buffer = NULL;
ISC_LINK_INIT(name, link);
+ INSIST(name->ht == NULL);
}
bool
diff --git a/lib/isc/ht.c b/lib/isc/ht.c
index eaf2b3c..e11050f 100644
--- a/lib/isc/ht.c
+++ b/lib/isc/ht.c
@@ -93,11 +93,54 @@ 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) {
+ const uint8_t *key, uint32_t keysize, bool case_sensitive) {
return (node->hashval == hashval && node->keysize == keysize &&
- memcmp(node->key, key, keysize) == 0);
+ (case_sensitive ? (memcmp(node->key, key, keysize) == 0)
+ : (memcasecmp(node->key, key, keysize) == 0)));
}
static uint32_t
@@ -341,7 +384,9 @@ nexttable:
for (isc_ht_node_t *node = ht->table[findex][hash]; node != NULL;
node = node->next)
{
- if (isc__ht_node_match(node, hashval, key, keysize)) {
+ if (isc__ht_node_match(node, hashval, key, keysize,
+ ht->case_sensitive))
+ {
return (node);
}
}
@@ -390,7 +435,9 @@ isc__ht_delete(isc_ht_t *ht, const unsigned char *key, const uint32_t keysize,
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)) {
+ if (isc__ht_node_match(node, hashval, key, keysize,
+ ht->case_sensitive))
+ {
if (prev == NULL) {
ht->table[idx][hash] = node->next;
} else {
--
2.33.0
Reference in New Issue Copy Permalink