Always call vio_in_addr() so that thd->remote is

always initialized. (Bug #5569)

sql/sql_parse.cc

@@ -501,6 +501,9 @@ check_connections(THD *thd)
 	     thd->thread_id));
   DBUG_PRINT("info",("New connection received on %s",
 			vio_description(net->vio)));
+
+  vio_in_addr(net->vio,&thd->remote.sin_addr);
+
   if (!thd->host)                           // If TCP/IP connection
   {
     char ip[30];
@@ -521,7 +524,6 @@ check_connections(THD *thd)
 #endif
     if (!(specialflag & SPECIAL_NO_RESOLVE))
     {
-      vio_in_addr(net->vio,&thd->remote.sin_addr);
       thd->host=ip_to_hostname(&thd->remote.sin_addr,&connect_errors);
       /* Cut very long hostnames to avoid possible overflows */
       if (thd->host)
@@ -543,7 +545,6 @@ check_connections(THD *thd)
     DBUG_PRINT("info",("Host: %s",thd->host));
     thd->host_or_ip= thd->host;
     thd->ip= 0;
-    bzero((char*) &thd->remote,sizeof(struct sockaddr));
   }
   vio_keepalive(net->vio, TRUE);
 

vio/viosocket.c

@@ -295,7 +295,7 @@ void vio_in_addr(Vio *vio, struct in_addr *in)
 {
   DBUG_ENTER("vio_in_addr");
   if (vio->localhost)
-    bzero((char*) in, sizeof(*in));	/* This should never be executed */
+    bzero((char*) in, sizeof(*in));
   else
     *in=vio->remote.sin_addr;
   DBUG_VOID_RETURN;

vio/viossl.c

@@ -259,7 +259,7 @@ void vio_ssl_in_addr(Vio *vio, struct in_addr *in)
 {
   DBUG_ENTER("vio_ssl_in_addr");
   if (vio->localhost)
-    bzero((char*) in, sizeof(*in));	/* This should never be executed */
+    bzero((char*) in, sizeof(*in));
   else
     *in=vio->remote.sin_addr;
   DBUG_VOID_RETURN;