daxi20/smartdns
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code lint and optimize code style

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This commit is contained in:
Nick Peng
2019-02-22 23:14:42 +08:00
parent c0c6fde39d
commit 7828f0ec27
28 changed files with 705 additions and 513 deletions
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22
src/dns_cache.c
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@@ -10,7 +10,7 @@ struct dns_cache_head {
pthread_mutex_t lock;
};
struct dns_cache_head dns_cache_head;
static struct dns_cache_head dns_cache_head;
int dns_cache_init(int size)
{
@@ -19,22 +19,22 @@ int dns_cache_init(int size)
dns_cache_head.num = 0;
dns_cache_head.size = size;
pthread_mutex_init(&dns_cache_head.lock, 0);
pthread_mutex_init(&dns_cache_head.lock, NULL);
return 0;
}
struct dns_cache *_dns_cache_last(void)
static __attribute__((unused)) struct dns_cache *_dns_cache_last(void)
{
return list_last_entry(&dns_cache_head.cache_list, struct dns_cache, list);
}
struct dns_cache *_dns_cache_first(void)
static struct dns_cache *_dns_cache_first(void)
{
return list_first_entry_or_null(&dns_cache_head.cache_list, struct dns_cache, list);
}
void _dns_cache_delete(struct dns_cache *dns_cache)
static void _dns_cache_delete(struct dns_cache *dns_cache)
{
hash_del(&dns_cache->node);
list_del_init(&dns_cache->list);
@@ -59,7 +59,7 @@ void dns_cache_release(struct dns_cache *dns_cache)
_dns_cache_delete(dns_cache);
}
void _dns_cache_remove(struct dns_cache *dns_cache)
static void _dns_cache_remove(struct dns_cache *dns_cache)
{
hash_del(&dns_cache->node);
list_del_init(&dns_cache->list);
@@ -74,6 +74,7 @@ int dns_cache_replace(char *domain, char *cname, int cname_ttl, int ttl, dns_typ
return 0;
}
/* lookup existing cache */
dns_cache = dns_cache_lookup(domain, qtype);
if (dns_cache == NULL) {
return 0;
@@ -83,6 +84,7 @@ int dns_cache_replace(char *domain, char *cname, int cname_ttl, int ttl, dns_typ
ttl = DNS_CACHE_TTL_MIN;
}
/* update cache data */
pthread_mutex_lock(&dns_cache_head.lock);
dns_cache->ttl = ttl;
dns_cache->qtype = qtype;
@@ -128,6 +130,7 @@ int dns_cache_insert(char *domain, char *cname, int cname_ttl, int ttl, dns_type
return 0;
}
/* if cache already exists, free */
dns_cache = dns_cache_lookup(domain, qtype);
if (dns_cache) {
dns_cache_delete(dns_cache);
@@ -179,6 +182,7 @@ int dns_cache_insert(char *domain, char *cname, int cname_ttl, int ttl, dns_type
INIT_LIST_HEAD(&dns_cache->check_list);
dns_cache_head.num++;
/* Release extra cache, remove oldest cache record */
if (dns_cache_head.num > dns_cache_head.size) {
struct dns_cache *del_cache;
del_cache = _dns_cache_first();
@@ -212,6 +216,7 @@ struct dns_cache *dns_cache_lookup(char *domain, dns_type_t qtype)
key = jhash(&qtype, sizeof(qtype), key);
time(&now);
/* find cache */
pthread_mutex_lock(&dns_cache_head.lock);
hash_for_each_possible(dns_cache_head.cache_hash, dns_cache, node, key)
{
@@ -228,6 +233,7 @@ struct dns_cache *dns_cache_lookup(char *domain, dns_type_t qtype)
}
if (dns_cache_ret) {
/* Return NULL if the cache times out */
if (now - dns_cache_ret->insert_time > dns_cache_ret->ttl) {
_dns_cache_remove(dns_cache_ret);
dns_cache_ret = NULL;
@@ -291,6 +297,7 @@ void dns_cache_invalidate(dns_cache_preinvalid_callback callback, int ttl_pre)
{
ttl = dns_cache->insert_time + dns_cache->ttl - now;
if (ttl > 0 && ttl < ttl_pre) {
/* If the TTL time is in the pre-timeout range, call callback function */
if (callback && dns_cache->del_pending == 0) {
list_add_tail(&dns_cache->check_list, &checklist);
dns_cache_get(dns_cache);
@@ -307,6 +314,7 @@ void dns_cache_invalidate(dns_cache_preinvalid_callback callback, int ttl_pre)
list_for_each_entry_safe(dns_cache, tmp, &checklist, check_list)
{
/* run callback */
if (callback) {
callback(dns_cache);
}
@@ -326,4 +334,4 @@ void dns_cache_destroy(void)
pthread_mutex_unlock(&dns_cache_head.lock);
pthread_mutex_destroy(&dns_cache_head.lock);
}
}