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Code Issues Releases Wiki Activity

Refactor the DNS_RDATASET_FIXED code to use constants instead of ifdefs

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This commit is contained in:
Ondřej Surý
2019-04-16 11:10:22 +02:00
parent 87daa5471d
commit 4edbb773a1
1 changed files with 33 additions and 51 deletions
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84
lib/dns/rbtdb.c
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@@ -754,6 +754,17 @@ hexdump(const char *desc, unsigned char *data, size_t size) {
}
#endif
/* Fixed RRSet helper macros */
#define DNS_RDATASET_LENGTH 2;
#if DNS_RDATASET_FIXED
#define DNS_RDATASET_ORDER 2
#define DNS_RDATASET_COUNT (count * 4)
#else /* !DNS_RDATASET_FIXED */
#define DNS_RDATASET_ORDER 0
#define DNS_RDATASET_COUNT 0
#endif /* DNS_RDATASET_FIXED */
/*
* DB Routines
@@ -2288,18 +2299,10 @@ setnsec3parameters(dns_db_t *db, rbtdb_version_t *version) {
*/
raw = (unsigned char *)header + sizeof(*header);
count = raw[0] * 256 + raw[1]; /* count */
#if DNS_RDATASET_FIXED
raw += count * 4 + 2;
#else
raw += 2;
#endif
raw += DNS_RDATASET_COUNT + DNS_RDATASET_LENGTH;
while (count-- > 0U) {
length = raw[0] * 256 + raw[1];
#if DNS_RDATASET_FIXED
raw += 4;
#else
raw += 2;
#endif
raw += DNS_RDATASET_ORDER + DNS_RDATASET_LENGTH;
region.base = raw;
region.length = length;
raw += length;
@@ -3105,20 +3108,12 @@ valid_glue(rbtdb_search_t *search, dns_name_t *name, rbtdb_rdatatype_t type,
header = search->zonecut_rdataset;
raw = (unsigned char *)header + sizeof(*header);
count = raw[0] * 256 + raw[1];
#if DNS_RDATASET_FIXED
raw += 2 + (4 * count);
#else
raw += 2;
#endif
raw += DNS_RDATASET_COUNT + DNS_RDATASET_LENGTH;
while (count > 0) {
count--;
size = raw[0] * 256 + raw[1];
#if DNS_RDATASET_FIXED
raw += 4;
#else
raw += 2;
#endif
raw += DNS_RDATASET_ORDER + DNS_RDATASET_LENGTH;
region.base = raw;
region.length = size;
raw += size;
@@ -3470,18 +3465,11 @@ matchparams(rdatasetheader_t *header, rbtdb_search_t *search)
raw = (unsigned char *)header + sizeof(*header);
count = raw[0] * 256 + raw[1]; /* count */
#if DNS_RDATASET_FIXED
raw += count * 4 + 2;
#else
raw += 2;
#endif
raw += DNS_RDATASET_COUNT + DNS_RDATASET_LENGTH;
while (count-- > 0) {
rdlen = raw[0] * 256 + raw[1];
#if DNS_RDATASET_FIXED
raw += 4;
#else
raw += 2;
#endif
raw += DNS_RDATASET_ORDER + DNS_RDATASET_LENGTH;
region.base = raw;
region.length = rdlen;
dns_rdata_fromregion(&rdata, search->rbtdb->common.rdclass,
@@ -8435,12 +8423,11 @@ rdataset_first(dns_rdataset_t *rdataset) {
return (ISC_R_NOMORE);
}
#if DNS_RDATASET_FIXED
if ((rdataset->attributes & DNS_RDATASETATTR_LOADORDER) == 0)
raw += 2 + (4 * count);
else
#endif
raw += 2;
if ((rdataset->attributes & DNS_RDATASETATTR_LOADORDER) == 0) {
raw += DNS_RDATASET_COUNT;
}
raw += DNS_RDATASET_LENGTH;
/*
* The privateuint4 field is the number of rdata beyond the
@@ -8475,16 +8462,14 @@ rdataset_next(dns_rdataset_t *rdataset) {
*/
raw = rdataset->private5;
#if DNS_RDATASET_FIXED
if ((rdataset->attributes & DNS_RDATASETATTR_LOADORDER) == 0) {
#endif
if ((rdataset->attributes & DNS_RDATASETATTR_LOADORDER) == 0)
#endif /* DNS_RDATASET_FIXED */
{
length = raw[0] * 256 + raw[1];
raw += length;
#if DNS_RDATASET_FIXED
}
rdataset->private5 = raw + 4; /* length(2) + order(2) */
#else
rdataset->private5 = raw + 2; /* length(2) */
#endif
rdataset->private5 = raw + DNS_RDATASET_ORDER + DNS_RDATASET_LENGTH;
return (ISC_R_SUCCESS);
}
@@ -8492,9 +8477,6 @@ rdataset_next(dns_rdataset_t *rdataset) {
static void
rdataset_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) {
unsigned char *raw = rdataset->private5; /* RDATASLAB */
#if DNS_RDATASET_FIXED
unsigned int offset;
#endif
unsigned int length;
isc_region_t r;
unsigned int flags = 0;
@@ -8507,18 +8489,18 @@ rdataset_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) {
*/
#if DNS_RDATASET_FIXED
if ((rdataset->attributes & DNS_RDATASETATTR_LOADORDER) != 0) {
unsigned int offset;
offset = (raw[0] << 24) + (raw[1] << 16) +
(raw[2] << 8) + raw[3];
raw = rdataset->private3;
raw += offset;
}
#endif
length = raw[0] * 256 + raw[1];
#if DNS_RDATASET_FIXED
raw += 4;
#else
raw += 2;
#endif
raw += DNS_RDATASET_ORDER + DNS_RDATASET_LENGTH;
if (rdataset->type == dns_rdatatype_rrsig) {
if (*raw & DNS_RDATASLAB_OFFLINE)
flags |= DNS_RDATA_OFFLINE;