Add /CLEARCACHE, oper only command which completely purges the DNS cache -- useful if you just want to cut down on ram use at any point.

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@6259 e03df62e-2008-0410-955e-edbf42e46eb7

2 files changed, 39 insertions, 0 deletions

diff --git a/src/cmd_clearcache.cpp b/src/cmd_clearcache.cpp
new file mode 100644
index 000000000..22e219a83
--- /dev/null
+++ b/src/cmd_clearcache.cpp
@@ -0,0 +1,30 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
+ *
+ * This program is free but copyrighted software; see
+ *            the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include "configreader.h"
+#include "users.h"
+#include "commands/cmd_admin.h"
+
+extern "C" command_t* init_command(InspIRCd* Instance)
+{
+	return new cmd_admin(Instance);
+}
+
+/** Handle /ADMIN
+ */
+CmdResult cmd_admin::Handle (const char** parameters, int pcnt, userrec *user)
+{
+	int n = ServerInstance->Res->ClearCache();
+	user->WriteServ("NOTICE %s :*** Cleared DNS cache of %d items.", user->nick, n);
+	return CMD_SUCCESS;
+}
diff --git a/src/dns.cpp b/src/dns.cpp
index 844077cf4..cea1c4a43 100644
--- a/src/dns.cpp
+++ b/src/dns.cpp
@@ -253,6 +253,15 @@ DNSRequest* DNS::AddQuery(DNSHeader *header, int &id, const char* original)
 	return req;
 }
 
+int DNS::ClearCache()
+{
+	/* This ensures the buckets are reset to sane levels */
+	int rv = this->cache->size();
+	delete this->cache;
+	this->cache = new dnscache();
+	return rv;
+}
+
 void DNS::Rehash()
 {
 	insp_inaddr addr;