import from UXP: Issue #2652 - Part 1: Add a way to programmatically clear the DNS cache. (f5ef3275)

netwerk/dns/ChildDNSService.cpp

@@ -202,6 +202,13 @@ ChildDNSService::GetDNSCacheEntries(nsTArray<mozilla::net::DNSCacheEntries> *arg
   return NS_ERROR_NOT_AVAILABLE;
 }
 
+NS_IMETHODIMP
+ChildDNSService::ClearCache()
+{
+  // Not available in IPC children.
+  return NS_ERROR_NOT_AVAILABLE;
+}
+
 NS_IMETHODIMP
 ChildDNSService::GetMyHostName(nsACString &result)
 {

netwerk/dns/nsDNSService2.cpp

@@ -1053,6 +1053,12 @@ nsDNSService::GetDNSCacheEntries(nsTArray<mozilla::net::DNSCacheEntries> *args)
     return NS_OK;
 }
 
+NS_IMETHODIMP
+nsDNSService::ClearCache() {
+  mResolver->FlushCache();
+  return NS_OK;
+}
+
 size_t
 nsDNSService::SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const
 {

netwerk/dns/nsIDNSService.idl

@@ -115,6 +115,11 @@ interface nsIDNSService : nsISupports
      */
     [noscript] void getDNSCacheEntries(in EntriesArray args);
 
+    /**
+     * Clears the DNS cache.
+     */
+    void clearCache();
+
     /**
      * @return the hostname of the operating system.
      */