s3:winbind: Add a lower-cost alternative to wbinfo -t: wbinfo --ping-dc

This just does a NULL RPC call through an existing NETLOGON connection. If
someone knows an operation that "just works" and does not return NOT_SUPPORTED,
please tell me :-)

1 files changed, 80 insertions, 0 deletions

diff --git a/source3/librpc/gen_ndr/srv_wbint.c b/source3/librpc/gen_ndr/srv_wbint.c
index 0f39cd93e1..efd9be6b7a 100644
--- a/source3/librpc/gen_ndr/srv_wbint.c
+++ b/source3/librpc/gen_ndr/srv_wbint.c
@@ -1610,6 +1610,79 @@ static bool api_wbint_ChangeMachineAccount(pipes_struct *p)
 	return true;
 }
 
+static bool api_wbint_PingDc(pipes_struct *p)
+{
+	const struct ndr_interface_call *call;
+	struct ndr_pull *pull;
+	struct ndr_push *push;
+	enum ndr_err_code ndr_err;
+	DATA_BLOB blob;
+	struct wbint_PingDc *r;
+
+	call = &ndr_table_wbint.calls[NDR_WBINT_PINGDC];
+
+	r = talloc(talloc_tos(), struct wbint_PingDc);
+	if (r == NULL) {
+		return false;
+	}
+
+	if (!prs_data_blob(&p->in_data.data, &blob, r)) {
+		talloc_free(r);
+		return false;
+	}
+
+	pull = ndr_pull_init_blob(&blob, r, NULL);
+	if (pull == NULL) {
+		talloc_free(r);
+		return false;
+	}
+
+	pull->flags |= LIBNDR_FLAG_REF_ALLOC;
+	ndr_err = call->ndr_pull(pull, NDR_IN, r);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		talloc_free(r);
+		return false;
+	}
+
+	if (DEBUGLEVEL >= 10) {
+		NDR_PRINT_IN_DEBUG(wbint_PingDc, r);
+	}
+
+	r->out.result = _wbint_PingDc(p, r);
+
+	if (p->rng_fault_state) {
+		talloc_free(r);
+		/* Return true here, srv_pipe_hnd.c will take care */
+		return true;
+	}
+
+	if (DEBUGLEVEL >= 10) {
+		NDR_PRINT_OUT_DEBUG(wbint_PingDc, r);
+	}
+
+	push = ndr_push_init_ctx(r, NULL);
+	if (push == NULL) {
+		talloc_free(r);
+		return false;
+	}
+
+	ndr_err = call->ndr_push(push, NDR_OUT, r);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		talloc_free(r);
+		return false;
+	}
+
+	blob = ndr_push_blob(push);
+	if (!prs_copy_data_in(&p->out_data.rdata, (const char *)blob.data, (uint32_t)blob.length)) {
+		talloc_free(r);
+		return false;
+	}
+
+	talloc_free(r);
+
+	return true;
+}
+
 static bool api_wbint_SetMapping(pipes_struct *p)
 {
 	const struct ndr_interface_call *call;
@@ -1853,6 +1926,7 @@ static struct api_struct api_wbint_cmds[] =
 	{"WBINT_LOOKUPRIDS", NDR_WBINT_LOOKUPRIDS, api_wbint_LookupRids},
 	{"WBINT_CHECKMACHINEACCOUNT", NDR_WBINT_CHECKMACHINEACCOUNT, api_wbint_CheckMachineAccount},
 	{"WBINT_CHANGEMACHINEACCOUNT", NDR_WBINT_CHANGEMACHINEACCOUNT, api_wbint_ChangeMachineAccount},
+	{"WBINT_PINGDC", NDR_WBINT_PINGDC, api_wbint_PingDc},
 	{"WBINT_SETMAPPING", NDR_WBINT_SETMAPPING, api_wbint_SetMapping},
 	{"WBINT_REMOVEMAPPING", NDR_WBINT_REMOVEMAPPING, api_wbint_RemoveMapping},
 	{"WBINT_SETHWM", NDR_WBINT_SETHWM, api_wbint_SetHWM},
@@ -2115,6 +2189,12 @@ NTSTATUS rpc_wbint_dispatch(struct rpc_pipe_client *cli, TALLOC_CTX *mem_ctx, co
 			return NT_STATUS_OK;
 		}
 
+		case NDR_WBINT_PINGDC: {
+			struct wbint_PingDc *r = (struct wbint_PingDc *)_r;
+			r->out.result = _wbint_PingDc(cli->pipes_struct, r);
+			return NT_STATUS_OK;
+		}
+
 		case NDR_WBINT_SETMAPPING: {
 			struct wbint_SetMapping *r = (struct wbint_SetMapping *)_r;
 			r->out.result = _wbint_SetMapping(cli->pipes_struct, r);