/*
* Unix SMB/CIFS implementation.
* RPC Pipe client / server routines
* Copyright (C) Andrew Tridgell 1992-1998,
* Largely re-written : 2005
* Copyright (C) Jeremy Allison 1998 - 2005
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "../librpc/gen_ndr/srv_spoolss.h"
#include "librpc/gen_ndr/ndr_named_pipe_auth.h"
#include "../libcli/named_pipe_auth/npa_tstream.h"
#include "rpc_server.h"
#include "smbd/globals.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_SRV
/****************************************************************************
Ensures we have at least RPC_HEADER_LEN amount of data in the incoming buffer.
****************************************************************************/
static ssize_t fill_rpc_header(struct pipes_struct *p, char *data, size_t data_to_copy)
{
size_t len_needed_to_complete_hdr =
MIN(data_to_copy, RPC_HEADER_LEN - p->in_data.pdu.length);
DEBUG(10, ("fill_rpc_header: data_to_copy = %u, "
"len_needed_to_complete_hdr = %u, "
"receive_len = %u\n",
(unsigned int)data_to_copy,
(unsigned int)len_needed_to_complete_hdr,
(unsigned int)p->in_data.pdu.length ));
if (p->in_data.pdu.data == NULL) {
p->in_data.pdu.data = talloc_array(p, uint8_t, RPC_HEADER_LEN);
}
if (p->in_data.pdu.data == NULL) {
DEBUG(0, ("talloc failed\n"));
return -1;
}
memcpy((char *)&p->in_data.pdu.data[p->in_data.pdu.length],
data, len_needed_to_complete_hdr);
p->in_data.pdu.length += len_needed_to_complete_hdr;
return (ssize_t)len_needed_to_complete_hdr;
}
static bool get_pdu_size(struct pipes_struct *p)
{
uint16_t frag_len;
/* the fill_rpc_header() call insures we copy only
* RPC_HEADER_LEN bytes. If this doesn't match then
* somethign is very wrong and we can only abort */
if (p->in_data.pdu.length != RPC_HEADER_LEN) {
DEBUG(0, ("Unexpected RPC Header size! "
"got %d, expected %d)\n",
(int)p->in_data.pdu.length,
RPC_HEADER_LEN));
set_incoming_fault(p);
return false;
}
frag_len = dcerpc_get_frag_length(&p->in_data.pdu);
/* verify it is a reasonable value */
if ((frag_len < RPC_HEADER_LEN) ||
(frag_len > RPC_MAX_PDU_FRAG_LEN)) {
DEBUG(0, ("Unexpected RPC Fragment size! (%d)\n",
frag_len));
set_incoming_fault(p);
return false;
}
p->in_data.pdu_needed_len = frag_len - RPC_HEADER_LEN;
/* allocate the space needed to fill the pdu */
p->in_data.pdu.data = talloc_realloc(p, p->in_data.pdu.data,
uint8_t, frag_len);
if (p->in_data.pdu.data == NULL) {
DEBUG(0, ("talloc_realloc failed\n"));
set_incoming_fault(p);
return false;
}
return true;
}
/****************************************************************************
Call this to free any talloc'ed memory. Do this after processing
a complete incoming and outgoing request (multiple incoming/outgoing
PDU's).
****************************************************************************/
static void free_pipe_context(struct pipes_struct *p)
{
data_blob_free(&p->out_data.frag);
data_blob_free(&p->out_data.rdata);
data_blob_free(&p->in_data.data);
DEBUG(3, ("free_pipe_context: "
"destroying talloc pool of size %lu\n",
(unsigned long)talloc_total_size(p->mem_ctx)));
talloc_free_children(p->mem_ctx);
}
/****************************************************************************
Accepts incoming data on an rpc pipe. Processes the data in pdu sized units.
****************************************************************************/
static ssize_t process_incoming_data(struct pipes_struct *p, char *data, size_t n)
{
size_t data_to_copy = MIN(n, RPC_MAX_PDU_FRAG_LEN
- p->in_data.pdu.length);
DEBUG(10, ("process_incoming_data: Start: pdu.length = %u, "
"pdu_needed_len = %u, incoming data = %u\n",
(unsigned int)p->in_data.pdu.length,
(unsigned int)p->in_data.pdu_needed_len,
(unsigned int)n ));
if(data_to_copy == 0) {
/*
* This is an error - data is being received and there is no
* space in the PDU. Free the received data and go into the
* fault state.
*/
DEBUG(0, ("process_incoming_data: "
"No space in incoming pdu buffer. "
"Current size = %u incoming data size = %u\n",
(unsigned int)p->in_data.pdu.length,
(unsigned int)n));
set_incoming_fault(p);
return -1;
}
/*
* If we have no data already, wait until we get at least
* a RPC_HEADER_LEN * number of bytes before we can do anything.
*/
if ((p->in_data.pdu_needed_len == 0) &&
(p->in_data.pdu.length < RPC_HEADER_LEN)) {
/*
* Always return here. If we have more data then the RPC_HEADER
* will be processed the next time around the loop.
*/
return fill_rpc_header(p, data, data_to_copy);
}
/*
* At this point we know we have at least an RPC_HEADER_LEN amount of
* data stored in p->in_data.pdu.
*/
/*
* If pdu_needed_len is zero this is a new pdu.
* Check how much more data we need, then loop again.
*/
if (p->in_data.pdu_needed_len == 0) {
bool ok = get_pdu_size(p);
if (!ok) {
return -1;
}
if (p->in_data.pdu_needed_len > 0) {
return 0;
}
/* If rret == 0 and pdu_needed_len == 0 here we have a PDU
* that consists of an RPC_HEADER only. This is a
* DCERPC_PKT_SHUTDOWN, DCERPC_PKT_CO_CANCEL or
* DCERPC_PKT_ORPHANED pdu type.
* Deal with this in process_complete_pdu(). */
}
/*
* Ok - at this point we have a valid RPC_HEADER.
* Keep reading until we have a full pdu.
*/
data_to_copy = MIN(data_to_copy, p->in_data.pdu_needed_len);
/*
* Copy as much of the data as we need into the p->in_data.pdu buffer.
* pdu_needed_len becomes zero when we have a complete pdu.
*/
memcpy((char *)&p->in_data.pdu.data[p->in_data.pdu.length],
data, data_to_copy);
p->in_data.pdu.length += data_to_copy;
p->in_data.pdu_needed_len -= data_to_copy;
/*
* Do we have a complete PDU ?
* (return the number of bytes handled in the call)
*/
if(p->in_data.pdu_needed_len == 0) {
process_complete_pdu(p);
return data_to_copy;
}
DEBUG(10, ("process_incoming_data: not a complete PDU yet. "
"pdu.length = %u, pdu_needed_len = %u\n",
(unsigned int)p->in_data.pdu.length,
(unsigned int)p->in_data.pdu_needed_len));
return (ssize_t)data_to_copy;
}
/****************************************************************************
Accepts incoming data on an internal rpc pipe.
****************************************************************************/
static ssize_t write_to_internal_pipe(struct pipes_struct *p, char *data, size_t n)
{
size_t data_left = n;
while(data_left) {
ssize_t data_used;
DEBUG(10, ("write_to_pipe: data_left = %u\n",
(unsigned int)data_left));
data_used = process_incoming_data(p, data, data_left);
DEBUG(10, ("write_to_pipe: data_used = %d\n",
(int)data_used));
if(data_used < 0) {
return -1;
}
data_left -= data_used;
data += data_used;
}
return n;
}
/****************************************************************************
Replies to a request to read data from a pipe.
Headers are interspersed with the data at PDU intervals. By the time
this function is called, the start of the data could possibly have been
read by an SMBtrans (file_offset != 0).
Calling create_rpc_reply() here is a hack. The data should already
have been prepared into arrays of headers + data stream sections.
****************************************************************************/
static ssize_t read_from_internal_pipe(struct pipes_struct *p, char *data,
size_t n, bool *is_data_outstanding)
{
uint32 pdu_remaining = 0;
ssize_t data_returned = 0;
if (!p) {
DEBUG(0,("read_from_pipe: pipe not open\n"));
return -1;
}
DEBUG(6,(" name: %s len: %u\n",
get_pipe_name_from_syntax(talloc_tos(), &p->syntax),
(unsigned int)n));
/*
* We cannot return more than one PDU length per
* read request.
*/
/*
* This condition should result in the connection being closed.
* Netapp filers seem to set it to 0xffff which results in domain
* authentications failing. Just ignore it so things work.
*/
if(n > RPC_MAX_PDU_FRAG_LEN) {
DEBUG(5,("read_from_pipe: too large read (%u) requested on "
"pipe %s. We can only service %d sized reads.\n",
(unsigned int)n,
get_pipe_name_from_syntax(talloc_tos(), &p->syntax),
RPC_MAX_PDU_FRAG_LEN ));
n = RPC_MAX_PDU_FRAG_LEN;
}
/*
* Determine if there is still data to send in the
* pipe PDU buffer. Always send this first. Never
* send more than is left in the current PDU. The
* client should send a new read request for a new
* PDU.
*/
pdu_remaining = p->out_data.frag.length
- p->out_data.current_pdu_sent;
if (pdu_remaining > 0) {
data_returned = (ssize_t)MIN(n, pdu_remaining);
DEBUG(10,("read_from_pipe: %s: current_pdu_len = %u, "
"current_pdu_sent = %u returning %d bytes.\n",
get_pipe_name_from_syntax(talloc_tos(), &p->syntax),
(unsigned int)p->out_data.frag.length,
(unsigned int)p->out_data.current_pdu_sent,
(int)data_returned));
memcpy(data,
p->out_data.frag.data
+ p->out_data.current_pdu_sent,
data_returned);
p->out_data.current_pdu_sent += (uint32)data_returned;
goto out;
}
/*
* At this point p->current_pdu_len == p->current_pdu_sent (which
* may of course be zero if this is the first return fragment.
*/
DEBUG(10,("read_from_pipe: %s: fault_state = %d : data_sent_length "
"= %u, p->out_data.rdata.length = %u.\n",
get_pipe_name_from_syntax(talloc_tos(), &p->syntax),
(int)p->fault_state,
(unsigned int)p->out_data.data_sent_length,
(unsigned int)p->out_data.rdata.length));
if (p->out_data.data_sent_length >= p->out_data.rdata.length) {
/*
* We have sent all possible data, return 0.
*/
data_returned = 0;
goto out;
}
/*
* We need to create a new PDU from the data left in p->rdata.
* Create the header/data/footers. This also sets up the fields
* p->current_pdu_len, p->current_pdu_sent, p->data_sent_length
* and stores the outgoing PDU in p->current_pdu.
*/
if(!create_next_pdu(p)) {
DEBUG(0,("read_from_pipe: %s: create_next_pdu failed.\n",
get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
return -1;
}
data_returned = MIN(n, p->out_data.frag.length);
memcpy(data, p->out_data.frag.data, (size_t)data_returned);
p->out_data.current_pdu_sent += (uint32)data_returned;
out:
(*is_data_outstanding) = p->out_data.frag.length > n;
if (p->out_data.current_pdu_sent == p->out_data.frag.length) {
/* We've returned everything in the out_data.frag
* so we're done with this pdu. Free it and reset
* current_pdu_sent. */
p->out_data.current_pdu_sent = 0;
data_blob_free(&p->out_data.frag);
if (p->out_data.data_sent_length >= p->out_data.rdata.length) {
/*
* We're completely finished with both outgoing and
* incoming data streams. It's safe to free all
* temporary data from this request.
*/
free_pipe_context(p);
}
}
return data_returned;
}
bool fsp_is_np(struct files_struct *fsp)
{
enum FAKE_FILE_TYPE type;
if ((fsp == NULL) || (fsp->fake_file_handle == NULL)) {
return false;
}
type = fsp->fake_file_handle->type;
return ((type == FAKE_FILE_TYPE_NAMED_PIPE)
|| (type == FAKE_FILE_TYPE_NAMED_PIPE_PROXY));
}
struct np_proxy_state {
uint16_t file_type;
uint16_t device_state;
uint64_t allocation_size;
struct tstream_context *npipe;
struct tevent_queue *read_queue;
struct tevent_queue *write_queue;
};
static struct np_proxy_state *make_external_rpc_pipe_p(TALLOC_CTX *mem_ctx,
const char *pipe_name,
const struct tsocket_address *local_address,
const struct tsocket_address *remote_address,
struct auth_serversupplied_info *server_info)
{
struct np_proxy_state *result;
char *socket_np_dir;
const char *socket_dir;
struct tevent_context *ev;
struct tevent_req *subreq;
struct netr_SamInfo3 *info3;
NTSTATUS status;
bool ok;
int ret;
int sys_errno;
result = talloc(mem_ctx, struct np_proxy_state);
if (result == NULL) {
DEBUG(0, ("talloc failed\n"));
return NULL;
}
result->read_queue = tevent_queue_create(result, "np_read");
if (result->read_queue == NULL) {
DEBUG(0, ("tevent_queue_create failed\n"));
goto fail;
}
result->write_queue = tevent_queue_create(result, "np_write");
if (result->write_queue == NULL) {
DEBUG(0, ("tevent_queue_create failed\n"));
goto fail;
}
ev = s3_tevent_context_init(talloc_tos());
if (ev == NULL) {
DEBUG(0, ("s3_tevent_context_init failed\n"));
goto fail;
}
socket_dir = lp_parm_const_string(
GLOBAL_SECTION_SNUM, "external_rpc_pipe", "socket_dir",
get_dyn_NCALRPCDIR());
if (socket_dir == NULL) {
DEBUG(0, ("externan_rpc_pipe:socket_dir not set\n"));
goto fail;
}
socket_np_dir = talloc_asprintf(talloc_tos(), "%s/np", socket_dir);
if (socket_np_dir == NULL) {
DEBUG(0, ("talloc_asprintf failed\n"));
goto fail;
}
info3 = talloc_zero(talloc_tos(), struct netr_SamInfo3);
if (info3 == NULL) {
DEBUG(0, ("talloc failed\n"));
goto fail;
}
status = serverinfo_to_SamInfo3(server_info, NULL, 0, info3);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(info3);
DEBUG(0, ("serverinfo_to_SamInfo3 failed: %s\n",
nt_errstr(status)));
goto fail;
}
become_root();
subreq = tstream_npa_connect_send(talloc_tos(), ev,
socket_np_dir,
pipe_name,
remote_address, /* client_addr */
NULL, /* client_name */
local_address, /* server_addr */
NULL, /* server_name */
info3,
server_info->user_session_key,
data_blob_null /* delegated_creds */);
if (subreq == NULL) {
unbecome_root();
DEBUG(0, ("tstream_npa_connect_send to %s for pipe %s and "
"user %s\\%s failed\n",
socket_np_dir, pipe_name, info3->base.domain.string,
info3->base.account_name.string));
goto fail;
}
ok = tevent_req_poll(subreq, ev);
unbecome_root();
if (!ok) {
DEBUG(0, ("tevent_req_poll to %s for pipe %s and user %s\\%s "
"failed for tstream_npa_connect: %s\n",
socket_np_dir, pipe_name, info3->base.domain.string,
info3->base.account_name.string,
strerror(errno)));
goto fail;
}
ret = tstream_npa_connect_recv(subreq, &sys_errno,
result,
&result->npipe,
&result->file_type,
&result->device_state,
&result->allocation_size);
TALLOC_FREE(subreq);
if (ret != 0) {
DEBUG(0, ("tstream_npa_connect_recv to %s for pipe %s and "
"user %s\\%s failed: %s\n",
socket_np_dir, pipe_name, info3->base.domain.string,
info3->base.account_name.string,
strerror(sys_errno)));
goto fail;
}
return result;
fail:
TALLOC_FREE(result);
return NULL;
}
NTSTATUS np_open(TALLOC_CTX *mem_ctx, const char *name,
const struct tsocket_address *local_address,
const struct tsocket_address *remote_address,
struct auth_serversupplied_info *server_info,
struct messaging_context *msg_ctx,
struct fake_file_handle **phandle)
{
const char **proxy_list;
struct fake_file_handle *handle;
proxy_list = lp_parm_string_list(-1, "np", "proxy", NULL);
handle = talloc(mem_ctx, struct fake_file_handle);
if (handle == NULL) {
return NT_STATUS_NO_MEMORY;
}
if ((proxy_list != NULL) && str_list_check_ci(proxy_list, name)) {
struct np_proxy_state *p;
p = make_external_rpc_pipe_p(handle, name,
local_address,
remote_address,
server_info);
handle->type = FAKE_FILE_TYPE_NAMED_PIPE_PROXY;
handle->private_data = p;
} else {
struct pipes_struct *p;
struct ndr_syntax_id syntax;
const char *client_address;
if (!is_known_pipename(name, &syntax)) {
TALLOC_FREE(handle);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if (tsocket_address_is_inet(remote_address, "ip")) {
client_address = tsocket_address_inet_addr_string(
remote_address,
talloc_tos());
if (client_address == NULL) {
TALLOC_FREE(handle);
return NT_STATUS_NO_MEMORY;
}
} else {
client_address = "";
}
p = make_internal_rpc_pipe_p(handle, &syntax, client_address,
server_info, msg_ctx);
handle->type = FAKE_FILE_TYPE_NAMED_PIPE;
handle->private_data = p;
}
if (handle->private_data == NULL) {
TALLOC_FREE(handle);
return NT_STATUS_PIPE_NOT_AVAILABLE;
}
*phandle = handle;
return NT_STATUS_OK;
}
bool np_read_in_progress(struct fake_file_handle *handle)
{
if (handle->type == FAKE_FILE_TYPE_NAMED_PIPE) {
return false;
}
if (handle->type == FAKE_FILE_TYPE_NAMED_PIPE_PROXY) {
struct np_proxy_state *p = talloc_get_type_abort(
handle->private_data, struct np_proxy_state);
size_t read_count;
read_count = tevent_queue_length(p->read_queue);
if (read_count > 0) {
return true;
}
return false;
}
return false;
}
struct np_write_state {
struct event_context *ev;
struct np_proxy_state *p;
struct iovec iov;
ssize_t nwritten;
};
static void np_write_done(struct tevent_req *subreq);
struct tevent_req *np_write_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
struct fake_file_handle *handle,
const uint8_t *data, size_t len)
{
struct tevent_req *req;
struct np_write_state *state;
NTSTATUS status;
DEBUG(6, ("np_write_send: len: %d\n", (int)len));
dump_data(50, data, len);
req = tevent_req_create(mem_ctx, &state, struct np_write_state);
if (req == NULL) {
return NULL;
}
if (len == 0) {
state->nwritten = 0;
status = NT_STATUS_OK;
goto post_status;
}
if (handle->type == FAKE_FILE_TYPE_NAMED_PIPE) {
struct pipes_struct *p = talloc_get_type_abort(
handle->private_data, struct pipes_struct);
state->nwritten = write_to_internal_pipe(p, (char *)data, len);
status = (state->nwritten >= 0)
? NT_STATUS_OK : NT_STATUS_UNEXPECTED_IO_ERROR;
goto post_status;
}
if (handle->type == FAKE_FILE_TYPE_NAMED_PIPE_PROXY) {
struct np_proxy_state *p = talloc_get_type_abort(
handle->private_data, struct np_proxy_state);
struct tevent_req *subreq;
state->ev = ev;
state->p = p;
state->iov.iov_base = CONST_DISCARD(void *, data);
state->iov.iov_len = len;
subreq = tstream_writev_queue_send(state, ev,
p->npipe,
p->write_queue,
&state->iov, 1);
if (subreq == NULL) {
goto fail;
}
tevent_req_set_callback(subreq, np_write_done, req);
return req;
}
status = NT_STATUS_INVALID_HANDLE;
post_status:
if (NT_STATUS_IS_OK(status)) {
tevent_req_done(req);
} else {
tevent_req_nterror(req, status);
}
return tevent_req_post(req, ev);
fail:
TALLOC_FREE(req);
return NULL;
}
static void np_write_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct np_write_state *state = tevent_req_data(
req, struct np_write_state);
ssize_t received;
int err;
received = tstream_writev_queue_recv(subreq, &err);
if (received < 0) {
tevent_req_nterror(req, map_nt_error_from_unix(err));
return;
}
state->nwritten = received;
tevent_req_done(req);
}
NTSTATUS np_write_recv(struct tevent_req *req, ssize_t *pnwritten)
{
struct np_write_state *state = tevent_req_data(
req, struct np_write_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
return status;
}
*pnwritten = state->nwritten;
return NT_STATUS_OK;
}
struct np_ipc_readv_next_vector_state {
uint8_t *buf;
size_t len;
off_t ofs;
size_t remaining;
};
static void np_ipc_readv_next_vector_init(struct np_ipc_readv_next_vector_state *s,
uint8_t *buf, size_t len)
{
ZERO_STRUCTP(s);
s->buf = buf;
s->len = MIN(len, UINT16_MAX);
}
static int np_ipc_readv_next_vector(struct tstream_context *stream,
void *private_data,
TALLOC_CTX *mem_ctx,
struct iovec **_vector,
size_t *count)
{
struct np_ipc_readv_next_vector_state *state =
(struct np_ipc_readv_next_vector_state *)private_data;
struct iovec *vector;
ssize_t pending;
size_t wanted;
if (state->ofs == state->len) {
*_vector = NULL;
*count = 0;
return 0;
}
pending = tstream_pending_bytes(stream);
if (pending == -1) {
return -1;
}
if (pending == 0 && state->ofs != 0) {
/* return a short read */
*_vector = NULL;
*count = 0;
return 0;
}
if (pending == 0) {
/* we want at least one byte and recheck again */
wanted = 1;
} else {
size_t missing = state->len - state->ofs;
if (pending > missing) {
/* there's more available */
state->remaining = pending - missing;
wanted = missing;
} else {
/* read what we can get and recheck in the next cycle */
wanted = pending;
}
}
vector = talloc_array(mem_ctx, struct iovec, 1);
if (!vector) {
return -1;
}
vector[0].iov_base = state->buf + state->ofs;
vector[0].iov_len = wanted;
state->ofs += wanted;
*_vector = vector;
*count = 1;
return 0;
}
struct np_read_state {
struct np_proxy_state *p;
struct np_ipc_readv_next_vector_state next_vector;
size_t nread;
bool is_data_outstanding;
};
static void np_read_done(struct tevent_req *subreq);
struct tevent_req *np_read_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
struct fake_file_handle *handle,
uint8_t *data, size_t len)
{
struct tevent_req *req;
struct np_read_state *state;
NTSTATUS status;
req = tevent_req_create(mem_ctx, &state, struct np_read_state);
if (req == NULL) {
return NULL;
}
if (handle->type == FAKE_FILE_TYPE_NAMED_PIPE) {
struct pipes_struct *p = talloc_get_type_abort(
handle->private_data, struct pipes_struct);
state->nread = read_from_internal_pipe(
p, (char *)data, len, &state->is_data_outstanding);
status = (state->nread >= 0)
? NT_STATUS_OK : NT_STATUS_UNEXPECTED_IO_ERROR;
goto post_status;
}
if (handle->type == FAKE_FILE_TYPE_NAMED_PIPE_PROXY) {
struct np_proxy_state *p = talloc_get_type_abort(
handle->private_data, struct np_proxy_state);
struct tevent_req *subreq;
np_ipc_readv_next_vector_init(&state->next_vector,
data, len);
subreq = tstream_readv_pdu_queue_send(state,
ev,
p->npipe,
p->read_queue,
np_ipc_readv_next_vector,
&state->next_vector);
if (subreq == NULL) {
}
tevent_req_set_callback(subreq, np_read_done, req);
return req;
}
status = NT_STATUS_INVALID_HANDLE;
post_status:
if (NT_STATUS_IS_OK(status)) {
tevent_req_done(req);
} else {
tevent_req_nterror(req, status);
}
return tevent_req_post(req, ev);
}
static void np_read_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct np_read_state *state = tevent_req_data(
req, struct np_read_state);
ssize_t ret;
int err;
ret = tstream_readv_pdu_queue_recv(subreq, &err);
TALLOC_FREE(subreq);
if (ret == -1) {
tevent_req_nterror(req, map_nt_error_from_unix(err));
return;
}
state->nread = ret;
state->is_data_outstanding = (state->next_vector.remaining > 0);
tevent_req_done(req);
return;
}
NTSTATUS np_read_recv(struct tevent_req *req, ssize_t *nread,
bool *is_data_outstanding)
{
struct np_read_state *state = tevent_req_data(
req, struct np_read_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
return status;
}
*nread = state->nread;
*is_data_outstanding = state->is_data_outstanding;
return NT_STATUS_OK;
}
/**
* @brief Create a new RPC client context which uses a local dispatch function.
*
* @param[in] conn The connection struct that will hold the pipe
*
* @param[out] spoolss_pipe A pointer to the connected rpc client pipe.
*
* @return NT_STATUS_OK on success, a corresponding NT status if an
* error occured.
*/
NTSTATUS rpc_connect_spoolss_pipe(connection_struct *conn,
struct rpc_pipe_client **spoolss_pipe)
{
NTSTATUS status;
/* TODO: check and handle disconnections */
if (!conn->spoolss_pipe) {
status = rpc_pipe_open_internal(conn,
&ndr_table_spoolss.syntax_id,
conn->server_info,
conn->sconn->msg_ctx,
&conn->spoolss_pipe);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
}
*spoolss_pipe = conn->spoolss_pipe;
return NT_STATUS_OK;
}