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A name is "bindable" if it can be set to point to a new value, i.e.

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name->ndata and name->length may be changed.
This commit is contained in:
Bob Halley 1999-08-19 23:26:16 +00:00
parent ff5fcd9e67
commit 08c8a934ce
1 changed files with 18 additions and 10 deletions
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28
lib/dns/name.c
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@ -151,6 +151,14 @@ do { \
name->attributes &= ~DNS_NAMEATTR_ABSOLUTE; \
} while (0);
/*
* A name is "bindable" if it can be set to point to a new value, i.e.
* name->ndata and name->length may be changed.
*/
#define BINDABLE(name) \
((name->attributes & (DNS_NAMEATTR_READONLY|DNS_NAMEATTR_DYNAMIC)) \
== 0)
static struct dns_name root = {
NAME_MAGIC,
(unsigned char *)"", 1, 1,
@ -867,7 +875,7 @@ dns_name_getlabelsequence(dns_name_t *source,
REQUIRE(n > 0);
REQUIRE(first < source->labels);
REQUIRE(first + n <= source->labels);
REQUIRE((target->attributes & DNS_NAMEATTR_READONLY) == 0);
REQUIRE(BINDABLE(target));
SETUP_OFFSETS(source, offsets, odata);
@ -898,7 +906,7 @@ dns_name_clone(dns_name_t *source, dns_name_t *target) {
REQUIRE(VALID_NAME(source));
REQUIRE(VALID_NAME(target));
REQUIRE((target->attributes & DNS_NAMEATTR_READONLY) == 0);
REQUIRE(BINDABLE(target));
target->ndata = source->ndata;
target->length = source->length;
@ -927,7 +935,7 @@ dns_name_fromregion(dns_name_t *name, isc_region_t *r) {
REQUIRE(VALID_NAME(name));
REQUIRE(r != NULL);
REQUIRE((name->attributes & DNS_NAMEATTR_READONLY) == 0);
REQUIRE(BINDABLE(name));
INIT_OFFSETS(name, offsets, odata);
@ -1003,7 +1011,7 @@ dns_name_fromtext(dns_name_t *name, isc_buffer_t *source,
isc_buffer_clear(target);
}
REQUIRE(isc_buffer_type(target) == ISC_BUFFERTYPE_BINARY);
REQUIRE((name->attributes & DNS_NAMEATTR_READONLY) == 0);
REQUIRE(BINDABLE(name));
INIT_OFFSETS(name, offsets, odata);
offsets[0] = 0;
@ -1946,7 +1954,7 @@ dns_name_fromwire(dns_name_t *name, isc_buffer_t *source,
}
REQUIRE(isc_buffer_type(target) == ISC_BUFFERTYPE_BINARY);
REQUIRE(dctx != NULL);
REQUIRE((name->attributes & DNS_NAMEATTR_READONLY) == 0);
REQUIRE(BINDABLE(name));
INIT_OFFSETS(name, offsets, odata);
@ -2370,7 +2378,7 @@ dns_name_concatenate(dns_name_t *prefix, dns_name_t *suffix, dns_name_t *name,
isc_buffer_clear(name->buffer);
}
REQUIRE(isc_buffer_type(target) == ISC_BUFFERTYPE_BINARY);
REQUIRE((name->attributes & DNS_NAMEATTR_READONLY) == 0);
REQUIRE(BINDABLE(name));
/*
* IMPORTANT NOTE
@ -2505,12 +2513,12 @@ dns_name_split(dns_name_t *name,
(VALID_NAME(prefix) &&
prefix->buffer != NULL &&
isc_buffer_type(prefix->buffer) == ISC_BUFFERTYPE_BINARY &&
(prefix->attributes & DNS_NAMEATTR_READONLY) == 0));
BINDABLE(prefix)));
REQUIRE(suffix == NULL ||
(VALID_NAME(suffix) &&
suffix->buffer != NULL &&
isc_buffer_type(suffix->buffer) == ISC_BUFFERTYPE_BINARY &&
(suffix->attributes & DNS_NAMEATTR_READONLY) == 0));
BINDABLE(suffix)));
/*
* When splitting bitstring labels, if prefix and suffix have the same
@ -2757,7 +2765,7 @@ dns_name_dup(dns_name_t *source, isc_mem_t *mctx, dns_name_t *target) {
REQUIRE(VALID_NAME(source));
REQUIRE(source->length > 0);
REQUIRE(VALID_NAME(target));
REQUIRE((target->attributes & DNS_NAMEATTR_READONLY) == 0);
REQUIRE(BINDABLE(target));
/*
* Make 'target' a dynamically allocated copy of 'source'.
@ -2776,7 +2784,7 @@ dns_name_dup(dns_name_t *source, isc_mem_t *mctx, dns_name_t *target) {
target->length = source->length;
target->labels = source->labels;
target->attributes = DNS_NAMEATTR_DYNAMIC | DNS_NAMEATTR_READONLY;
target->attributes = DNS_NAMEATTR_DYNAMIC;
if ((source->attributes & DNS_NAMEATTR_ABSOLUTE) != 0)
target->attributes |= DNS_NAMEATTR_ABSOLUTE;
if (target->offsets != NULL)