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Tidy up CNAME representaion.

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Use an explicit discriminator for the target union.
This commit is contained in:
Simon Kelley
2019-10-30 12:58:28 +00:00
parent 376cb97685
commit 1fd56c0e33
3 changed files with 15 additions and 21 deletions
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22
src/cache.c
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@@ -276,10 +276,10 @@ char *cache_get_name(struct crec *crecp)
char *cache_get_cname_target(struct crec *crecp)
{
if (crecp->addr.cname.uid != SRC_PTR)
if (crecp->addr.cname.is_name_ptr)
return crecp->addr.cname.target.name;
else
return cache_get_name(crecp->addr.cname.target.cache);
return crecp->addr.cname.target.name;
}
@@ -309,7 +309,7 @@ struct crec *cache_enumerate(int init)
static int is_outdated_cname_pointer(struct crec *crecp)
{
if (!(crecp->flags & F_CNAME) || crecp->addr.cname.uid == SRC_PTR)
if (!(crecp->flags & F_CNAME) || crecp->addr.cname.is_name_ptr)
return 0;
/* NB. record may be reused as DS or DNSKEY, where uid is
@@ -776,13 +776,11 @@ int cache_recv_insert(time_t now, int fd)
the order reversal on the new_chain. */
if (newc)
{
if (!crecp)
{
newc->addr.cname.target.cache = NULL;
/* anything other than zero, to avoid being mistaken for CNAME to interface-name */
newc->addr.cname.uid = 1;
}
else
newc->addr.cname.is_name_ptr = 0;
if (!crecp)
newc->addr.cname.target.cache = NULL;
else
{
next_uid(crecp);
newc->addr.cname.target.cache = crecp;
@@ -1226,7 +1224,7 @@ void cache_reload(void)
cache->ttd = a->ttl;
cache->name.namep = a->alias;
cache->addr.cname.target.name = a->target;
cache->addr.cname.uid = SRC_PTR;
cache->addr.cname.is_name_ptr = 1;
cache->uid = UID_NONE;
cache_hash(cache);
make_non_terminals(cache);