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authorAndrew Tridgell <tridge@samba.org>2003-11-26 01:16:41 +0000
committerAndrew Tridgell <tridge@samba.org>2003-11-26 01:16:41 +0000
commite0ac659917066dbf7f8fdbcc7684ce2b49dd04d9 (patch)
tree349f47df69b41ca0c9a11452e7f56e6c6c3647ce /source4/librpc/rpc
parent06942f3ddbb897c66644c253d1d2a7a21a31702e (diff)
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signed DCERPC over TCP now works !
* moved ntlmssp code into libcli/auth/, and updated to latest ntlmssp code from samba3 (thanks Andrew! the new interface is great) * added signing/ntlmssp support in the dcerpc code * added a dcerpc_auth.c module for the various dcerpc auth mechanisms (This used to be commit c18c9b5585a3e5f7868562820c14f7cb529cdbcd)
Diffstat (limited to 'source4/librpc/rpc')
-rw-r--r--source4/librpc/rpc/dcerpc.c246
-rw-r--r--source4/librpc/rpc/dcerpc.h2
-rw-r--r--source4/librpc/rpc/dcerpc_auth.c130
-rw-r--r--source4/librpc/rpc/dcerpc_smb.c11
-rw-r--r--source4/librpc/rpc/dcerpc_tcp.c13
5 files changed, 349 insertions, 53 deletions
diff --git a/source4/librpc/rpc/dcerpc.c b/source4/librpc/rpc/dcerpc.c
index 012677a122..bf5da4edb4 100644
--- a/source4/librpc/rpc/dcerpc.c
+++ b/source4/librpc/rpc/dcerpc.c
@@ -41,6 +41,8 @@ struct dcerpc_pipe *dcerpc_pipe_init(void)
p->reference_count = 0;
p->mem_ctx = mem_ctx;
p->call_id = 1;
+ p->auth_info = NULL;
+ p->ntlmssp_state = NULL;
return p;
}
@@ -61,7 +63,8 @@ void dcerpc_pipe_close(struct dcerpc_pipe *p)
parse a data blob into a dcerpc_packet structure. This handles both
input and output packets
*/
-NTSTATUS dcerpc_pull(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct dcerpc_packet *pkt)
+static NTSTATUS dcerpc_pull(DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
+ struct dcerpc_packet *pkt)
{
struct ndr_pull *ndr;
@@ -73,32 +76,169 @@ NTSTATUS dcerpc_pull(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct dcerpc_packet
return ndr_pull_dcerpc_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
}
+/*
+ parse a possibly signed blob into a dcerpc request packet structure
+*/
+static NTSTATUS dcerpc_pull_request_sign(struct dcerpc_pipe *p,
+ DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
+ struct dcerpc_packet *pkt)
+{
+ struct ndr_pull *ndr;
+ NTSTATUS status;
+ struct dcerpc_auth auth;
+ DATA_BLOB auth_blob;
+
+ /* non-signed packets are simpler */
+ if (!p->auth_info || !p->ntlmssp_state) {
+ return dcerpc_pull(blob, mem_ctx, pkt);
+ }
+
+ ndr = ndr_pull_init_blob(blob, mem_ctx);
+ if (!ndr) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* pull the basic packet */
+ status = ndr_pull_dcerpc_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ if (pkt->ptype != DCERPC_PKT_RESPONSE) {
+ return status;
+ }
+
+ auth_blob.length = 8 + pkt->auth_length;
+
+ /* check for a valid length */
+ if (pkt->u.response.stub_and_verifier.length < auth_blob.length) {
+ return NT_STATUS_INFO_LENGTH_MISMATCH;
+ }
+
+ auth_blob.data =
+ pkt->u.response.stub_and_verifier.data +
+ pkt->u.response.stub_and_verifier.length - auth_blob.length;
+ pkt->u.response.stub_and_verifier.length -= auth_blob.length;
+
+ /* pull the auth structure */
+ ndr = ndr_pull_init_blob(&auth_blob, mem_ctx);
+ if (!ndr) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = ndr_pull_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, &auth);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /* check the signature */
+ status = ntlmssp_check_packet(p->ntlmssp_state,
+ pkt->u.response.stub_and_verifier.data,
+ pkt->u.response.stub_and_verifier.length,
+ &auth.credentials);
+
+ /* remove the indicated amount of paddiing */
+ if (pkt->u.response.stub_and_verifier.length < auth.auth_pad_length) {
+ return NT_STATUS_INFO_LENGTH_MISMATCH;
+ }
+ pkt->u.response.stub_and_verifier.length -= auth.auth_pad_length;
+
+ return status;
+}
+
/*
push a dcerpc_packet into a blob. This handles both input and
output packets
*/
-NTSTATUS dcerpc_push(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct dcerpc_packet *pkt)
+static NTSTATUS dcerpc_push(struct dcerpc_pipe *p,
+ DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
+ struct dcerpc_packet *pkt)
{
- struct ndr_push *ndr;
NTSTATUS status;
+ struct ndr_push *ndr;
ndr = ndr_push_init_ctx(mem_ctx);
if (!ndr) {
return NT_STATUS_NO_MEMORY;
}
+ if (p->auth_info) {
+ pkt->auth_length = p->auth_info->credentials.length;
+ } else {
+ pkt->auth_length = 0;
+ }
+
status = ndr_push_dcerpc_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
+ if (p->auth_info) {
+ status = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS,
+ p->auth_info);
+ }
+
*blob = ndr_push_blob(ndr);
/* fill in the frag length */
SSVAL(blob->data, 8, blob->length);
- return status;
+ return NT_STATUS_OK;
+}
+
+
+/*
+ push a dcerpc request packet into a blob, possibly signing it.
+*/
+static NTSTATUS dcerpc_push_request_sign(struct dcerpc_pipe *p,
+ DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
+ struct dcerpc_packet *pkt)
+{
+ NTSTATUS status;
+ struct ndr_push *ndr;
+
+ /* non-signed packets are simpler */
+ if (!p->auth_info || !p->ntlmssp_state) {
+ return dcerpc_push(p, blob, mem_ctx, pkt);
+ }
+
+ ndr = ndr_push_init_ctx(mem_ctx);
+ if (!ndr) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = ndr_push_dcerpc_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /* pad to 8 byte multiple */
+ p->auth_info->auth_pad_length = NDR_ALIGN(ndr, 8);
+ ndr_push_zero(ndr, p->auth_info->auth_pad_length);
+
+ /* sign the packet */
+ status = ntlmssp_sign_packet(p->ntlmssp_state,
+ ndr->data+24, ndr->offset-24,
+ &p->auth_info->credentials);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /* add the auth verifier */
+ status = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, p->auth_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /* extract the whole packet as a blob */
+ *blob = ndr_push_blob(ndr);
+
+ /* fill in the fragment length and auth_length */
+ SSVAL(blob->data, 8, blob->length);
+ SSVAL(blob->data, 10, p->auth_info->credentials.length);
+
+ return NT_STATUS_OK;
}
@@ -118,28 +258,25 @@ static void init_dcerpc_hdr(struct dcerpc_packet *pkt)
/*
perform a bind using the given syntax
+
+ the auth_info structure is updated with the reply authentication info
+ on success
*/
NTSTATUS dcerpc_bind(struct dcerpc_pipe *p,
+ TALLOC_CTX *mem_ctx,
const struct dcerpc_syntax_id *syntax,
const struct dcerpc_syntax_id *transfer_syntax)
{
- TALLOC_CTX *mem_ctx;
struct dcerpc_packet pkt;
NTSTATUS status;
DATA_BLOB blob;
- DATA_BLOB blob_out;
struct dcerpc_syntax_id tsyntax;
- mem_ctx = talloc_init("dcerpc_bind");
- if (!mem_ctx) {
- return NT_STATUS_NO_MEMORY;
- }
-
init_dcerpc_hdr(&pkt);
pkt.ptype = DCERPC_PKT_BIND;
pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
- pkt.call_id = p->call_id++;
+ pkt.call_id = p->call_id;
pkt.auth_length = 0;
pkt.u.bind.max_xmit_frag = 0x2000;
@@ -148,7 +285,6 @@ NTSTATUS dcerpc_bind(struct dcerpc_pipe *p,
pkt.u.bind.num_contexts = 1;
pkt.u.bind.ctx_list = talloc(mem_ctx, sizeof(pkt.u.bind.ctx_list[0]));
if (!pkt.u.bind.ctx_list) {
- talloc_destroy(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
pkt.u.bind.ctx_list[0].context_id = 0;
@@ -156,23 +292,23 @@ NTSTATUS dcerpc_bind(struct dcerpc_pipe *p,
pkt.u.bind.ctx_list[0].abstract_syntax = *syntax;
tsyntax = *transfer_syntax;
pkt.u.bind.ctx_list[0].transfer_syntaxes = &tsyntax;
- pkt.u.bind.auth_verifier = data_blob(NULL, 0);
+ pkt.u.bind.auth_info = data_blob(NULL, 0);
- status = dcerpc_push(&blob, mem_ctx, &pkt);
+ /* construct the NDR form of the packet */
+ status = dcerpc_push(p, &blob, mem_ctx, &pkt);
if (!NT_STATUS_IS_OK(status)) {
- talloc_destroy(mem_ctx);
return status;
}
- status = p->transport.full_request(p, mem_ctx, &blob, &blob_out);
+ /* send it on its way */
+ status = p->transport.full_request(p, mem_ctx, &blob, &blob);
if (!NT_STATUS_IS_OK(status)) {
- talloc_destroy(mem_ctx);
return status;
}
- status = dcerpc_pull(&blob_out, mem_ctx, &pkt);
+ /* unmarshall the NDR */
+ status = dcerpc_pull(&blob, mem_ctx, &pkt);
if (!NT_STATUS_IS_OK(status)) {
- talloc_destroy(mem_ctx);
return status;
}
@@ -185,13 +321,55 @@ NTSTATUS dcerpc_bind(struct dcerpc_pipe *p,
p->srv_max_xmit_frag = pkt.u.bind_ack.max_xmit_frag;
p->srv_max_recv_frag = pkt.u.bind_ack.max_recv_frag;
- talloc_destroy(mem_ctx);
+ /* the bind_ack might contain a reply set of credentials */
+ if (p->auth_info && pkt.u.bind_ack.auth_info.length) {
+ status = ndr_pull_struct_blob(&pkt.u.bind_ack.auth_info,
+ mem_ctx,
+ p->auth_info,
+ (ndr_pull_flags_fn_t)ndr_pull_dcerpc_auth);
+ }
return status;
}
-/* Perform a bind using the given UUID and version */
+/*
+ perform a continued bind (and auth3)
+*/
+NTSTATUS dcerpc_auth3(struct dcerpc_pipe *p,
+ TALLOC_CTX *mem_ctx)
+{
+ struct dcerpc_packet pkt;
+ NTSTATUS status;
+ DATA_BLOB blob;
+
+ init_dcerpc_hdr(&pkt);
+
+ pkt.ptype = DCERPC_PKT_AUTH3;
+ pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
+ pkt.call_id = p->call_id++;
+ pkt.auth_length = 0;
+ pkt.u.auth._pad = 0;
+ pkt.u.auth.auth_info = data_blob(NULL, 0);
+
+ /* construct the NDR form of the packet */
+ status = dcerpc_push(p, &blob, mem_ctx, &pkt);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /* send it on its way */
+ status = p->transport.initial_request(p, mem_ctx, &blob);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ return status;
+}
+
+
+/* perform a dcerpc bind, using the uuid as the key */
NTSTATUS dcerpc_bind_byuuid(struct dcerpc_pipe *p,
+ TALLOC_CTX *mem_ctx,
const char *uuid, unsigned version)
{
struct dcerpc_syntax_id syntax;
@@ -215,7 +393,7 @@ NTSTATUS dcerpc_bind_byuuid(struct dcerpc_pipe *p,
transfer_syntax.major_version = 2;
transfer_syntax.minor_version = 0;
- return dcerpc_bind(p, &syntax, &transfer_syntax);
+ return dcerpc_bind(p, mem_ctx, &syntax, &transfer_syntax);
}
/*
@@ -230,7 +408,7 @@ NTSTATUS dcerpc_request(struct dcerpc_pipe *p,
struct dcerpc_packet pkt;
NTSTATUS status;
- DATA_BLOB blob_in, blob_out, payload;
+ DATA_BLOB blob, payload;
uint32 remaining, chunk_size;
init_dcerpc_hdr(&pkt);
@@ -261,12 +439,12 @@ NTSTATUS dcerpc_request(struct dcerpc_pipe *p,
(stub_data_in->length - remaining);
pkt.u.request.stub_and_verifier.length = chunk_size;
- status = dcerpc_push(&blob_in, mem_ctx, &pkt);
+ status = dcerpc_push_request_sign(p, &blob, mem_ctx, &pkt);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
- status = p->transport.initial_request(p, mem_ctx, &blob_in);
+ status = p->transport.initial_request(p, mem_ctx, &blob);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
@@ -285,15 +463,18 @@ NTSTATUS dcerpc_request(struct dcerpc_pipe *p,
(stub_data_in->length - remaining);
pkt.u.request.stub_and_verifier.length = remaining;
- status = dcerpc_push(&blob_in, mem_ctx, &pkt);
+ status = dcerpc_push_request_sign(p, &blob, mem_ctx, &pkt);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
/* send the pdu and get the initial response pdu */
- status = p->transport.full_request(p, mem_ctx, &blob_in, &blob_out);
+ status = p->transport.full_request(p, mem_ctx, &blob, &blob);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
- status = dcerpc_pull(&blob_out, mem_ctx, &pkt);
+ status = dcerpc_pull_request_sign(p, &blob, mem_ctx, &pkt);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
@@ -317,12 +498,12 @@ NTSTATUS dcerpc_request(struct dcerpc_pipe *p,
while (!(pkt.pfc_flags & DCERPC_PFC_FLAG_LAST)) {
uint32 length;
- status = p->transport.secondary_request(p, mem_ctx, &blob_out);
+ status = p->transport.secondary_request(p, mem_ctx, &blob);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
- status = dcerpc_pull(&blob_out, mem_ctx, &pkt);
+ status = dcerpc_pull_request_sign(p, &blob, mem_ctx, &pkt);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
@@ -568,6 +749,9 @@ NTSTATUS dcerpc_ndr_request(struct dcerpc_pipe *p,
goto failed;
}
+ /* possibly check the packet signature */
+
+
if (p->flags & DCERPC_DEBUG_VALIDATE_OUT) {
status = dcerpc_ndr_validate_out(mem_ctx, struct_ptr, struct_size,
ndr_push, ndr_pull);
diff --git a/source4/librpc/rpc/dcerpc.h b/source4/librpc/rpc/dcerpc.h
index e0e7c8bd5a..e41b998d90 100644
--- a/source4/librpc/rpc/dcerpc.h
+++ b/source4/librpc/rpc/dcerpc.h
@@ -36,6 +36,8 @@ struct dcerpc_pipe {
uint32 srv_max_xmit_frag;
uint32 srv_max_recv_frag;
unsigned flags;
+ struct ntlmssp_state *ntlmssp_state;
+ struct dcerpc_auth *auth_info;
struct dcerpc_transport {
void *private;
diff --git a/source4/librpc/rpc/dcerpc_auth.c b/source4/librpc/rpc/dcerpc_auth.c
new file mode 100644
index 0000000000..32fdcb0b86
--- /dev/null
+++ b/source4/librpc/rpc/dcerpc_auth.c
@@ -0,0 +1,130 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ dcerpc authentication operations
+
+ Copyright (C) Andrew Tridgell 2003
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+/*
+ do a simple ntlm style authentication on a dcerpc pipe
+*/
+NTSTATUS dcerpc_bind_auth_ntlm(struct dcerpc_pipe *p,
+ const char *uuid, unsigned version,
+ const char *domain,
+ const char *username,
+ const char *password)
+{
+ NTSTATUS status;
+ struct ntlmssp_state *state;
+ TALLOC_CTX *mem_ctx;
+
+ mem_ctx = talloc_init("dcerpc_bind_auth_ntlm");
+ if (!mem_ctx) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = ntlmssp_client_start(&state);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ status = ntlmssp_set_domain(state, domain);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto done;
+ }
+
+ status = ntlmssp_set_username(state, username);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto done;
+ }
+
+ status = ntlmssp_set_password(state, password);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto done;
+ }
+
+ p->auth_info = talloc(p->mem_ctx, sizeof(*p->auth_info));
+ if (!p->auth_info) {
+ status = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ p->auth_info->auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
+ p->auth_info->auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
+ p->auth_info->auth_pad_length = 0;
+ p->auth_info->auth_reserved = 0;
+ p->auth_info->auth_context_id = random();
+ p->auth_info->credentials = data_blob(NULL, 0);
+ p->ntlmssp_state = NULL;
+
+ status = ntlmssp_update(state,
+ p->auth_info->credentials,
+ &p->auth_info->credentials);
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ goto done;
+ }
+ status = dcerpc_bind_byuuid(p, mem_ctx, uuid, version);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto done;
+ }
+
+ status = ntlmssp_update(state,
+ p->auth_info->credentials,
+ &p->auth_info->credentials);
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ goto done;
+ }
+
+ status = dcerpc_auth3(p, mem_ctx);
+ p->ntlmssp_state = state;
+ p->auth_info->credentials = data_blob(NULL, 0);
+
+ ntlmssp_sign_init(state);
+
+done:
+ talloc_destroy(mem_ctx);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ p->ntlmssp_state = NULL;
+ }
+
+ return status;
+}
+
+
+/*
+ do a non-athenticated dcerpc bind
+*/
+NTSTATUS dcerpc_bind_auth_none(struct dcerpc_pipe *p,
+ const char *uuid, unsigned version)
+{
+ TALLOC_CTX *mem_ctx;
+ NTSTATUS status;
+
+ mem_ctx = talloc_init("dcerpc_bind_auth_ntlm");
+ if (!mem_ctx) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = dcerpc_bind_byuuid(p, mem_ctx, uuid, version);
+ talloc_destroy(mem_ctx);
+
+ return status;
+}
diff --git a/source4/librpc/rpc/dcerpc_smb.c b/source4/librpc/rpc/dcerpc_smb.c
index 6af997275c..9acae00249 100644
--- a/source4/librpc/rpc/dcerpc_smb.c
+++ b/source4/librpc/rpc/dcerpc_smb.c
@@ -301,9 +301,7 @@ static const char *smb_peer_name(struct dcerpc_pipe *p)
*/
NTSTATUS dcerpc_pipe_open_smb(struct dcerpc_pipe **p,
struct cli_tree *tree,
- const char *pipe_name,
- const char *pipe_uuid,
- uint32 pipe_version)
+ const char *pipe_name)
{
struct smb_private *smb;
NTSTATUS status;
@@ -375,12 +373,5 @@ NTSTATUS dcerpc_pipe_open_smb(struct dcerpc_pipe **p,
(*p)->transport.private = smb;
tree->reference_count++;
- /* bind to the pipe, using the uuid as the key */
- status = dcerpc_bind_byuuid(*p, pipe_uuid, pipe_version);
-
- if (!NT_STATUS_IS_OK(status)) {
- dcerpc_pipe_close(*p);
- }
-
return NT_STATUS_OK;
}
diff --git a/source4/librpc/rpc/dcerpc_tcp.c b/source4/librpc/rpc/dcerpc_tcp.c
index ec94baf583..b3523e6855 100644
--- a/source4/librpc/rpc/dcerpc_tcp.c
+++ b/source4/librpc/rpc/dcerpc_tcp.c
@@ -146,12 +146,9 @@ static const char *tcp_peer_name(struct dcerpc_pipe *p)
*/
NTSTATUS dcerpc_pipe_open_tcp(struct dcerpc_pipe **p,
const char *server,
- uint32 port,
- const char *pipe_uuid,
- uint32 pipe_version)
+ uint32 port)
{
struct tcp_private *tcp;
- NTSTATUS status;
int fd;
struct in_addr addr;
@@ -194,13 +191,5 @@ NTSTATUS dcerpc_pipe_open_tcp(struct dcerpc_pipe **p,
(*p)->transport.private = tcp;
- /* bind to the pipe, using the uuid as the key */
- status = dcerpc_bind_byuuid(*p, pipe_uuid, pipe_version);
-
- if (!NT_STATUS_IS_OK(status)) {
- dcerpc_pipe_close(*p);
- return status;
- }
-
return NT_STATUS_OK;
}