netapi32: Avoid process heap allocations.

dlls/netapi32/netapi32.c

@@ -183,7 +183,18 @@ NET_API_STATUS WINAPI NetServerGetInfo(LMSTR servername, DWORD level, LPBYTE* bu
 
     if (!local)
     {
-        if (samba_init()) return samba_funcs->server_getinfo( servername, level, bufptr );
+        if (samba_init())
+        {
+            ULONG size = 1024;
+
+            for (;;)
+            {
+                if (!(*bufptr = malloc( size ))) return ERROR_OUTOFMEMORY;
+                ret = samba_funcs->server_getinfo( servername, level, *bufptr, &size );
+                if (ret) free( *bufptr );
+                if (ret != ERROR_INSUFFICIENT_BUFFER) return ret;
+            }
+        }
         FIXME( "remote computers not supported\n" );
         return ERROR_INVALID_LEVEL;
     }
@@ -964,7 +975,18 @@ NET_API_STATUS WINAPI NetWkstaGetInfo( LMSTR servername, DWORD level,
 
     if (!local)
     {
-        if (samba_init()) return samba_funcs->wksta_getinfo( servername, level, bufptr );
+        if (samba_init())
+        {
+            ULONG size = 1024;
+
+            for (;;)
+            {
+                if (!(*bufptr = malloc( size ))) return ERROR_OUTOFMEMORY;
+                ret = samba_funcs->wksta_getinfo( servername, level, *bufptr, &size );
+                if (ret) free( *bufptr );
+                if (ret != ERROR_INSUFFICIENT_BUFFER) return ret;
+            }
+        }
         FIXME( "remote computers not supported\n" );
         return ERROR_INVALID_LEVEL;
     }

dlls/netapi32/unixlib.h

@@ -20,10 +20,10 @@
 
 struct samba_funcs
 {
-    NET_API_STATUS (WINAPI *server_getinfo)( const WCHAR *server, DWORD level, BYTE **buffer );
+    NET_API_STATUS (WINAPI *server_getinfo)( const WCHAR *server, DWORD level, void *buffer, ULONG *size );
     NET_API_STATUS (WINAPI *share_add)( const WCHAR *server, DWORD level, const BYTE *buffer, DWORD *err );
     NET_API_STATUS (WINAPI *share_del)( const WCHAR *server, const WCHAR *share, DWORD reserved );
-    NET_API_STATUS (WINAPI *wksta_getinfo)( const WCHAR *server, DWORD level, BYTE **buffer );
+    NET_API_STATUS (WINAPI *wksta_getinfo)( const WCHAR *server, DWORD level, void *buffer, ULONG *size );
     NET_API_STATUS (WINAPI *change_password)( const WCHAR *domain, const WCHAR *user,
                                               const WCHAR *old, const WCHAR *new );
 };