winbindd: add retry to _winbind_SendToSam

Bug: https://bugzilla.samba.org/show_bug.cgi?id=13332

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Thu Mar 15 20:57:44 CET 2018 on sn-devel-144

diff --git a/source3/winbindd/winbindd_dual_srv.c b/source3/winbindd/winbindd_dual_srv.c
index 20b919ca3b79ce56fc66dd6e884031004ca59768..4cea73feaf9eef927dda52e63fdeb87f426f7abe 100644 (file)
--- a/source3/winbindd/winbindd_dual_srv.c
+++ b/source3/winbindd/winbindd_dual_srv.c
@@ -1851,6 +1851,8 @@ NTSTATUS _winbind_SendToSam(struct pipes_struct *p, struct winbind_SendToSam *r)
        NTSTATUS status;
        struct rpc_pipe_client *netlogon_pipe;
        struct netlogon_creds_cli_context *netlogon_creds_ctx = NULL;
+       struct dcerpc_binding_handle *b = NULL;
+       bool retry = false;
 
        DEBUG(5, ("_winbind_SendToSam received\n"));
        domain = wb_child_domain();
@@ -1858,17 +1860,25 @@ NTSTATUS _winbind_SendToSam(struct pipes_struct *p, struct winbind_SendToSam *r)
                return NT_STATUS_REQUEST_NOT_ACCEPTED;
        }
 
+reconnect:
        status = cm_connect_netlogon_secure(domain,
                                            &netlogon_pipe,
                                            &netlogon_creds_ctx);
+       reset_cm_connection_on_error(domain, NULL, status);
        if (!NT_STATUS_IS_OK(status)) {
                DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
                return status;
        }
 
+       b = netlogon_pipe->binding_handle;
+
        status = netlogon_creds_cli_SendToSam(netlogon_creds_ctx,
-                                             netlogon_pipe->binding_handle,
+                                             b,
                                              &r->in.message);
+       if (!retry && reset_cm_connection_on_error(domain, b, status)) {
+               retry = true;
+               goto reconnect;
+       }
 
        return status;
 }