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Separate hostname resolve cache based on ip_type 

(cherry picked from commit c1c1ec690e)
This commit is contained in:
Fabio Alessandrelli 2016-12-08 12:18:18 +01:00
parent 00fdcf3cd0
commit 3bb1709fd7
1 changed files with 15 additions and 11 deletions
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26
core/io/ip.cpp
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@ -107,6 +107,10 @@ struct _IP_ResolverPrivate {
HashMap<String, IP_Address> cache;
static String get_cache_key(String p_hostname, IP::Type p_type) {
return itos(p_type) + p_hostname;
}
};
@ -115,14 +119,12 @@ IP_Address IP::resolve_hostname(const String& p_hostname, IP::Type p_type) {
GLOBAL_LOCK_FUNCTION;
if (resolver->cache.has(p_hostname))
if ((resolver->cache[p_hostname].is_ipv4() && p_type != IP::TYPE_IPV6) ||
(!resolver->cache[p_hostname].is_ipv4() && p_type != IP::TYPE_IPV4))
return resolver->cache[p_hostname];
// requested type is different from type in cache. continue resolution, if successful it'll overwrite cache
String key = _IP_ResolverPrivate::get_cache_key(p_hostname, p_type);
if (resolver->cache.has(key))
return resolver->cache[key];
IP_Address res = _resolve_hostname(p_hostname, p_type);
resolver->cache[p_hostname]=res;
resolver->cache[key]=res;
return res;
}
@ -137,12 +139,11 @@ IP::ResolverID IP::resolve_hostname_queue_item(const String& p_hostname, IP::Typ
return id;
}
String key = _IP_ResolverPrivate::get_cache_key(p_hostname, p_type);
resolver->queue[id].hostname=p_hostname;
resolver->queue[id].type = p_type;
if (resolver->cache.has(p_hostname) &&
((resolver->cache[p_hostname].is_ipv4() && p_type != IP::TYPE_IPV6) ||
(!resolver->cache[p_hostname].is_ipv4() && p_type != IP::TYPE_IPV4))) {
resolver->queue[id].response=resolver->cache[p_hostname];
if (resolver->cache.has(key)) {
resolver->queue[id].response=resolver->cache[key];
resolver->queue[id].status=IP::RESOLVER_STATUS_DONE;
} else {
resolver->queue[id].response=IP_Address();
@ -196,7 +197,10 @@ void IP::clear_cache(const String &p_hostname) {
if (p_hostname.empty()) {
resolver->cache.clear();
} else {
resolver->cache.erase(p_hostname);
resolver->cache.erase(_IP_ResolverPrivate::get_cache_key(p_hostname, IP::TYPE_NONE));
resolver->cache.erase(_IP_ResolverPrivate::get_cache_key(p_hostname, IP::TYPE_IPV4));
resolver->cache.erase(_IP_ResolverPrivate::get_cache_key(p_hostname, IP::TYPE_IPV6));
resolver->cache.erase(_IP_ResolverPrivate::get_cache_key(p_hostname, IP::TYPE_ANY));
}
};