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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2020 Tintri by DDN, Inc. All rights reserved.
*/
/*
* Client NDR RPC interface.
*/
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/fcntl.h>
#include <time.h>
#include <strings.h>
#include <assert.h>
#include <errno.h>
#include <thread.h>
#include <syslog.h>
#include <synch.h>
#include <libmlrpc/libmlrpc.h>
#include <netsmb/smbfs_api.h>
#include <smbsrv/libsmb.h>
#include <smbsrv/libmlsvc.h>
#include <libsmbrdr.h>
#include <mlsvc.h>
/*
* This call must be made to initialize an RPC client structure and bind
* to the remote service before any RPCs can be exchanged with that service.
*
* The mlsvc_handle_t is a wrapper that is used to associate an RPC handle
* with the client context for an instance of the interface. The handle
* is zeroed to ensure that it doesn't look like a valid handle -
* handle content is provided by the remove service.
*
* The client points to this top-level handle so that we know when to
* unbind and teardown the connection. As each handle is initialized it
* will inherit a reference to the client context.
*
* Returns 0 or an NT_STATUS: (failed in...)
*
* NT_STATUS_BAD_NETWORK_PATH (get server addr)
* NT_STATUS_NETWORK_ACCESS_DENIED (connect, auth)
* NT_STATUS_BAD_NETWORK_NAME (tcon)
* RPC_NT_SERVER_TOO_BUSY (open pipe)
* RPC_NT_SERVER_UNAVAILABLE (open pipe)
* NT_STATUS_ACCESS_DENIED (open pipe)
* NT_STATUS_INVALID_PARAMETER (rpc bind)
* NT_STATUS_INTERNAL_ERROR (bad args etc)
* NT_STATUS_NO_MEMORY
*/
static DWORD
ndr_rpc_bind_common(mlsvc_handle_t *handle, char *server, char *domain,
char *username, const char *service, ndr_auth_ctx_t *auth_ctx)
{
struct smb_ctx *ctx = NULL;
ndr_service_t *svc;
DWORD status;
int rc;
if (handle == NULL || server == NULL || server[0] == '\0' ||
domain == NULL || username == NULL)
return (NT_STATUS_INTERNAL_ERROR);
/* In case the service was not registered... */
if ((svc = ndr_svc_lookup_name(service)) == NULL)
return (NT_STATUS_INTERNAL_ERROR);
/*
* Some callers pass this when they want a NULL session.
* Todo: have callers pass an empty string for that.
*/
if (strcmp(username, MLSVC_ANON_USER) == 0)
username = "";
/*
* Setup smbfs library handle, authenticate, connect to
* the IPC$ share. This will reuse an existing connection
* if the driver already has one for this combination of
* server, user, domain. It may return any of:
* NT_STATUS_BAD_NETWORK_PATH (get server addr)
* NT_STATUS_NETWORK_ACCESS_DENIED (connect, auth)
* NT_STATUS_BAD_NETWORK_NAME (tcon)
*/
status = smbrdr_ctx_new(&ctx, server, domain, username);
if (status != NT_STATUS_SUCCESS) {
syslog(LOG_ERR, "ndr_rpc_bind: smbrdr_ctx_new"
"(Srv=%s Dom=%s User=%s), %s (0x%x)",
server, domain, username,
xlate_nt_status(status), status);
/*
* If the error is one where changing to a new DC
* might help, try looking for a different DC.
*/
switch (status) {
case NT_STATUS_BAD_NETWORK_PATH:
case NT_STATUS_BAD_NETWORK_NAME:
/* Look for a new DC */
smb_ddiscover_bad_dc(server);
default:
break;
}
return (status);
}
/*
* Setup the RPC client handle.
*/
rc = mlrpc_clh_create(handle, ctx);
if (rc != 0) {
syslog(LOG_ERR, "ndr_rpc_bind: mlrpc_clh_create: rc=%d", rc);
smbrdr_ctx_free(ctx);
switch (rc) {
case ENOMEM:
return (NT_STATUS_NO_MEMORY);
case EINVAL:
return (NT_STATUS_INVALID_PARAMETER);
default:
return (NT_STATUS_INTERNAL_ERROR);
}
}
/*
* Setup authentication, if requested.
*/
status = mlrpc_clh_set_auth(handle, auth_ctx);
if (status != 0) {
syslog(LOG_DEBUG, "ndr_rpc_bind: "
"mlrpc_clh_set_auth, %s (0x%x)",
xlate_nt_status(status), status);
goto errout;
}
/*
* This does the pipe open and OtW RPC bind.
* Handles pipe open retries.
*/
status = mlrpc_clh_bind(handle, svc);
if (status != 0) {
syslog(LOG_DEBUG, "ndr_rpc_bind: "
"mlrpc_clh_bind, %s (0x%x)",
xlate_nt_status(status), status);
switch (status) {
case RPC_NT_SERVER_TOO_BUSY:
/* Look for a new DC */
smb_ddiscover_bad_dc(server);
break;
default:
break;
}
goto errout;
}
return (NT_STATUS_SUCCESS);
errout:
ctx = mlrpc_clh_free(handle);
if (ctx != NULL) {
smbrdr_ctx_free(ctx);
}
return (status);
}
DWORD
ndr_rpc_bind(mlsvc_handle_t *handle, char *server, char *domain,
char *username, const char *service)
{
return (ndr_rpc_bind_common(handle, server, domain, username, service,
NULL));
}
DWORD
ndr_rpc_bind_secure(mlsvc_handle_t *handle, char *server, char *domain,
char *username, const char *service, ndr_auth_ctx_t *auth_ctx)
{
return (ndr_rpc_bind_common(handle, server, domain, username, service,
auth_ctx));
}
/*
* Unbind and close the pipe to an RPC service
* and cleanup the smb_ctx.
*
* The heap may or may not be destroyed (see mlrpc_clh_free)
*/
void
ndr_rpc_unbind(mlsvc_handle_t *handle)
{
struct smb_ctx *ctx;
ctx = mlrpc_clh_free(handle);
if (ctx != NULL)
smbrdr_ctx_free(ctx);
bzero(handle, sizeof (mlsvc_handle_t));
}
void
ndr_rpc_status(mlsvc_handle_t *handle, int opnum, DWORD status)
{
ndr_service_t *svc;
char *name = "NDR RPC";
char *s = "unknown";
switch (NT_SC_SEVERITY(status)) {
case NT_STATUS_SEVERITY_SUCCESS:
s = "success";
break;
case NT_STATUS_SEVERITY_INFORMATIONAL:
s = "info";
break;
case NT_STATUS_SEVERITY_WARNING:
s = "warning";
break;
case NT_STATUS_SEVERITY_ERROR:
s = "error";
break;
}
if (handle) {
svc = handle->clnt->binding->service;
name = svc->name;
}
smb_tracef("%s[0x%02x]: %s: %s (0x%08x)",
name, opnum, s, xlate_nt_status(status), status);
}
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