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samba-mirror/source3/rpc_server/rpc_ncacn_np.c
Björn Baumbach 96b5bf1370 auth: move copy_session_info() from source3 into the global auth context
Signed-off-by: Björn Baumbach <bb@sernet.de>
Reviewed-by: Volker Lendecke <vl@samba.org>
2018-10-11 10:28:17 +02:00

1151 lines
30 KiB
C

/*
* 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
* Copyright (C) Simo Sorce 2010
* Copyright (C) Andrew Bartlett 2011
*
* 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 "rpc_client/cli_pipe.h"
#include "rpc_server/srv_pipe_internal.h"
#include "rpc_dce.h"
#include "../libcli/named_pipe_auth/npa_tstream.h"
#include "rpc_server/rpc_ncacn_np.h"
#include "librpc/gen_ndr/netlogon.h"
#include "librpc/gen_ndr/auth.h"
#include "../auth/auth_sam_reply.h"
#include "../auth/auth_util.h"
#include "auth.h"
#include "rpc_server/rpc_pipes.h"
#include "../lib/tsocket/tsocket.h"
#include "../lib/util/tevent_ntstatus.h"
#include "rpc_contexts.h"
#include "rpc_server/rpc_config.h"
#include "librpc/ndr/ndr_table.h"
#include "rpc_server/rpc_server.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_SRV
static struct npa_state *npa_state_init(TALLOC_CTX *mem_ctx)
{
struct npa_state *npa;
npa = talloc_zero(mem_ctx, struct npa_state);
if (npa == NULL) {
return NULL;
}
npa->read_queue = tevent_queue_create(npa, "npa_cli_read");
if (npa->read_queue == NULL) {
DEBUG(0, ("tevent_queue_create failed\n"));
goto fail;
}
npa->write_queue = tevent_queue_create(npa, "npa_cli_write");
if (npa->write_queue == NULL) {
DEBUG(0, ("tevent_queue_create failed\n"));
goto fail;
}
return npa;
fail:
talloc_free(npa);
return NULL;
}
NTSTATUS make_internal_rpc_pipe_socketpair(
TALLOC_CTX *mem_ctx,
struct tevent_context *ev_ctx,
struct messaging_context *msg_ctx,
const char *pipe_name,
const struct ndr_syntax_id *syntax,
const struct tsocket_address *remote_address,
const struct tsocket_address *local_address,
const struct auth_session_info *session_info,
struct npa_state **pnpa)
{
TALLOC_CTX *tmp_ctx = talloc_stackframe();
struct named_pipe_client *npc;
struct tevent_req *subreq;
struct npa_state *npa;
NTSTATUS status;
int error;
int rc;
DEBUG(4, ("Create of internal pipe %s requested\n", pipe_name));
npa = npa_state_init(tmp_ctx);
if (npa == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
npa->file_type = FILE_TYPE_MESSAGE_MODE_PIPE;
npa->device_state = 0xff | 0x0400 | 0x0100;
npa->allocation_size = 4096;
npc = named_pipe_client_init(npa,
ev_ctx,
msg_ctx,
pipe_name,
NULL, /* term_fn */
npa->file_type,
npa->device_state,
npa->allocation_size,
NULL); /* private_data */
if (npc == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
npa->private_data = (void*) npc;
rc = tstream_npa_socketpair(npa->file_type,
npa,
&npa->stream,
npc,
&npc->tstream);
if (rc == -1) {
status = map_nt_error_from_unix(errno);
goto out;
}
npc->remote_client_addr = tsocket_address_copy(remote_address, npc);
if (npc->remote_client_addr == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
npc->remote_client_name = tsocket_address_inet_addr_string(npc->remote_client_addr,
npc);
if (npc->remote_client_name == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
npc->local_server_addr = tsocket_address_copy(local_address, npc);
if (npc->local_server_addr == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
npc->local_server_name = tsocket_address_inet_addr_string(
npc->local_server_addr, npc);
if (npc->local_server_name == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
npc->session_info = copy_session_info(npc, session_info);
if (npc->session_info == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
rc = make_server_pipes_struct(npc,
npc->msg_ctx,
npc->pipe_name,
NCACN_NP,
npc->remote_client_addr,
npc->local_server_addr,
npc->session_info,
&npc->p,
&error);
if (rc == -1) {
status = map_nt_error_from_unix(error);
goto out;
}
npc->write_queue = tevent_queue_create(npc, "npa_server_write_queue");
if (npc->write_queue == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
subreq = dcerpc_read_ncacn_packet_send(npc, npc->ev, npc->tstream);
if (subreq == NULL) {
DEBUG(2, ("Failed to start receiving packets\n"));
status = NT_STATUS_PIPE_BROKEN;
goto out;
}
tevent_req_set_callback(subreq, named_pipe_packet_process, npc);
*pnpa = talloc_steal(mem_ctx, npa);
status = NT_STATUS_OK;
out:
talloc_free(tmp_ctx);
return status;
}
/****************************************************************************
Make an internal namedpipes structure
****************************************************************************/
struct pipes_struct *make_internal_rpc_pipe_p(TALLOC_CTX *mem_ctx,
const struct ndr_syntax_id *syntax,
const struct tsocket_address *remote_address,
const struct tsocket_address *local_address,
const struct auth_session_info *session_info,
struct messaging_context *msg_ctx)
{
struct pipes_struct *p;
struct pipe_rpc_fns *context_fns;
const char *pipe_name;
int ret;
const struct ndr_interface_table *table;
table = ndr_table_by_uuid(&syntax->uuid);
if (table == NULL) {
DEBUG(0,("unknown interface\n"));
return NULL;
}
pipe_name = dcerpc_default_transport_endpoint(mem_ctx, NCACN_NP, table);
DEBUG(4,("Create pipe requested %s\n", pipe_name));
ret = make_base_pipes_struct(mem_ctx, msg_ctx, pipe_name,
NCALRPC, RPC_LITTLE_ENDIAN,
remote_address, local_address, &p);
if (ret) {
DEBUG(0,("ERROR! no memory for pipes_struct!\n"));
return NULL;
}
if (!init_pipe_handles(p, syntax)) {
DEBUG(0,("open_rpc_pipe_p: init_pipe_handles failed.\n"));
TALLOC_FREE(p);
return NULL;
}
p->session_info = copy_session_info(p, session_info);
if (p->session_info == NULL) {
DEBUG(0, ("open_rpc_pipe_p: copy_serverinfo failed\n"));
close_policy_by_pipe(p);
TALLOC_FREE(p);
return NULL;
}
context_fns = talloc_zero(p, struct pipe_rpc_fns);
if (context_fns == NULL) {
DEBUG(0,("talloc() failed!\n"));
TALLOC_FREE(p);
return NULL;
}
context_fns->next = context_fns->prev = NULL;
context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(syntax);
context_fns->cmds = rpc_srv_get_pipe_cmds(syntax);
context_fns->context_id = 0;
context_fns->syntax = *syntax;
/* add to the list of open contexts */
DLIST_ADD(p->contexts, context_fns);
DEBUG(4,("Created internal pipe %s\n", pipe_name));
return p;
}
static NTSTATUS rpcint_dispatch(struct pipes_struct *p,
TALLOC_CTX *mem_ctx,
uint32_t opnum,
const DATA_BLOB *in_data,
DATA_BLOB *out_data)
{
struct pipe_rpc_fns *fns = find_pipe_fns_by_context(p->contexts, 0);
uint32_t num_cmds = fns->n_cmds;
const struct api_struct *cmds = fns->cmds;
uint32_t i;
bool ok;
/* set opnum */
p->opnum = opnum;
for (i = 0; i < num_cmds; i++) {
if (cmds[i].opnum == opnum && cmds[i].fn != NULL) {
break;
}
}
if (i == num_cmds) {
return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
}
p->in_data.data = *in_data;
p->out_data.rdata = data_blob_null;
ok = cmds[i].fn(p);
p->in_data.data = data_blob_null;
if (!ok) {
data_blob_free(&p->out_data.rdata);
talloc_free_children(p->mem_ctx);
return NT_STATUS_RPC_CALL_FAILED;
}
if (p->fault_state) {
NTSTATUS status;
status = NT_STATUS(p->fault_state);
p->fault_state = 0;
data_blob_free(&p->out_data.rdata);
talloc_free_children(p->mem_ctx);
return status;
}
*out_data = p->out_data.rdata;
talloc_steal(mem_ctx, out_data->data);
p->out_data.rdata = data_blob_null;
talloc_free_children(p->mem_ctx);
return NT_STATUS_OK;
}
struct rpcint_bh_state {
struct pipes_struct *p;
};
static bool rpcint_bh_is_connected(struct dcerpc_binding_handle *h)
{
struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
struct rpcint_bh_state);
if (!hs->p) {
return false;
}
return true;
}
static uint32_t rpcint_bh_set_timeout(struct dcerpc_binding_handle *h,
uint32_t timeout)
{
/* TODO: implement timeouts */
return UINT32_MAX;
}
struct rpcint_bh_raw_call_state {
DATA_BLOB in_data;
DATA_BLOB out_data;
uint32_t out_flags;
};
static struct tevent_req *rpcint_bh_raw_call_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct dcerpc_binding_handle *h,
const struct GUID *object,
uint32_t opnum,
uint32_t in_flags,
const uint8_t *in_data,
size_t in_length)
{
struct rpcint_bh_state *hs =
dcerpc_binding_handle_data(h,
struct rpcint_bh_state);
struct tevent_req *req;
struct rpcint_bh_raw_call_state *state;
bool ok;
NTSTATUS status;
req = tevent_req_create(mem_ctx, &state,
struct rpcint_bh_raw_call_state);
if (req == NULL) {
return NULL;
}
state->in_data.data = discard_const_p(uint8_t, in_data);
state->in_data.length = in_length;
ok = rpcint_bh_is_connected(h);
if (!ok) {
tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
return tevent_req_post(req, ev);
}
/* TODO: allow async */
status = rpcint_dispatch(hs->p, state, opnum,
&state->in_data,
&state->out_data);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
tevent_req_done(req);
return tevent_req_post(req, ev);
}
static NTSTATUS rpcint_bh_raw_call_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
uint8_t **out_data,
size_t *out_length,
uint32_t *out_flags)
{
struct rpcint_bh_raw_call_state *state =
tevent_req_data(req,
struct rpcint_bh_raw_call_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
*out_data = talloc_move(mem_ctx, &state->out_data.data);
*out_length = state->out_data.length;
*out_flags = 0;
tevent_req_received(req);
return NT_STATUS_OK;
}
struct rpcint_bh_disconnect_state {
uint8_t _dummy;
};
static struct tevent_req *rpcint_bh_disconnect_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct dcerpc_binding_handle *h)
{
struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
struct rpcint_bh_state);
struct tevent_req *req;
struct rpcint_bh_disconnect_state *state;
bool ok;
req = tevent_req_create(mem_ctx, &state,
struct rpcint_bh_disconnect_state);
if (req == NULL) {
return NULL;
}
ok = rpcint_bh_is_connected(h);
if (!ok) {
tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
return tevent_req_post(req, ev);
}
/*
* TODO: do a real async disconnect ...
*
* For now the caller needs to free pipes_struct
*/
hs->p = NULL;
tevent_req_done(req);
return tevent_req_post(req, ev);
}
static NTSTATUS rpcint_bh_disconnect_recv(struct tevent_req *req)
{
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
tevent_req_received(req);
return NT_STATUS_OK;
}
static bool rpcint_bh_ref_alloc(struct dcerpc_binding_handle *h)
{
return true;
}
static void rpcint_bh_do_ndr_print(struct dcerpc_binding_handle *h,
int ndr_flags,
const void *_struct_ptr,
const struct ndr_interface_call *call)
{
void *struct_ptr = discard_const(_struct_ptr);
if (DEBUGLEVEL < 11) {
return;
}
if (ndr_flags & NDR_IN) {
ndr_print_function_debug(call->ndr_print,
call->name,
ndr_flags,
struct_ptr);
}
if (ndr_flags & NDR_OUT) {
ndr_print_function_debug(call->ndr_print,
call->name,
ndr_flags,
struct_ptr);
}
}
static const struct dcerpc_binding_handle_ops rpcint_bh_ops = {
.name = "rpcint",
.is_connected = rpcint_bh_is_connected,
.set_timeout = rpcint_bh_set_timeout,
.raw_call_send = rpcint_bh_raw_call_send,
.raw_call_recv = rpcint_bh_raw_call_recv,
.disconnect_send = rpcint_bh_disconnect_send,
.disconnect_recv = rpcint_bh_disconnect_recv,
.ref_alloc = rpcint_bh_ref_alloc,
.do_ndr_print = rpcint_bh_do_ndr_print,
};
static NTSTATUS rpcint_binding_handle_ex(TALLOC_CTX *mem_ctx,
const struct ndr_syntax_id *abstract_syntax,
const struct ndr_interface_table *ndr_table,
const struct tsocket_address *remote_address,
const struct tsocket_address *local_address,
const struct auth_session_info *session_info,
struct messaging_context *msg_ctx,
struct dcerpc_binding_handle **binding_handle)
{
struct dcerpc_binding_handle *h;
struct rpcint_bh_state *hs;
if (ndr_table) {
abstract_syntax = &ndr_table->syntax_id;
}
h = dcerpc_binding_handle_create(mem_ctx,
&rpcint_bh_ops,
NULL,
ndr_table,
&hs,
struct rpcint_bh_state,
__location__);
if (h == NULL) {
return NT_STATUS_NO_MEMORY;
}
hs->p = make_internal_rpc_pipe_p(hs,
abstract_syntax,
remote_address,
local_address,
session_info,
msg_ctx);
if (hs->p == NULL) {
TALLOC_FREE(h);
return NT_STATUS_NO_MEMORY;
}
*binding_handle = h;
return NT_STATUS_OK;
}
/**
* @brief Create a new DCERPC Binding Handle which uses a local dispatch function.
*
* @param[in] mem_ctx The memory context to use.
*
* @param[in] ndr_table Normally the ndr_table_<name>.
*
* @param[in] remote_address The info about the connected client.
*
* @param[in] serversupplied_info The server supplied authentication function.
*
* @param[in] msg_ctx The messaging context that can be used by the server
*
* @param[out] binding_handle A pointer to store the connected
* dcerpc_binding_handle
*
* @return NT_STATUS_OK on success, a corresponding NT status if an
* error occurred.
*
* @code
* struct dcerpc_binding_handle *winreg_binding;
* NTSTATUS status;
*
* status = rpcint_binding_handle(tmp_ctx,
* &ndr_table_winreg,
* p->remote_address,
* p->session_info,
* p->msg_ctx
* &winreg_binding);
* @endcode
*/
NTSTATUS rpcint_binding_handle(TALLOC_CTX *mem_ctx,
const struct ndr_interface_table *ndr_table,
const struct tsocket_address *remote_address,
const struct tsocket_address *local_address,
const struct auth_session_info *session_info,
struct messaging_context *msg_ctx,
struct dcerpc_binding_handle **binding_handle)
{
return rpcint_binding_handle_ex(mem_ctx, NULL, ndr_table, remote_address,
local_address, session_info,
msg_ctx, binding_handle);
}
/**
* @internal
*
* @brief Create a new RPC client context which uses a local transport.
*
* This creates a local transport. It is a shortcut to directly call the server
* functions and avoid marshalling.
* NOTE: this function should be used only by rpc_pipe_open_interface()
*
* @param[in] mem_ctx The memory context to use.
*
* @param[in] ndr_table the ndr_table_<name> structure.
*
* @param[in] serversupplied_info The server supplied authentication function.
*
* @param[in] remote_address The client address information.
*
* @param[in] msg_ctx The messaging context to use.
*
* @param[out] presult A pointer to store the connected rpc client pipe.
*
* @return NT_STATUS_OK on success, a corresponding NT status if an
* error occurred.
*/
NTSTATUS rpc_pipe_open_internal(TALLOC_CTX *mem_ctx,
const struct ndr_interface_table *ndr_table,
const struct auth_session_info *session_info,
const struct tsocket_address *remote_address,
const struct tsocket_address *local_address,
struct messaging_context *msg_ctx,
struct rpc_pipe_client **presult)
{
struct rpc_pipe_client *result;
NTSTATUS status;
result = talloc_zero(mem_ctx, struct rpc_pipe_client);
if (result == NULL) {
return NT_STATUS_NO_MEMORY;
}
result->abstract_syntax = ndr_table->syntax_id;
result->transfer_syntax = ndr_transfer_syntax_ndr;
if (remote_address == NULL) {
struct tsocket_address *local;
int rc;
rc = tsocket_address_inet_from_strings(mem_ctx,
"ip",
"127.0.0.1",
0,
&local);
if (rc < 0) {
TALLOC_FREE(result);
return NT_STATUS_NO_MEMORY;
}
remote_address = local;
}
result->max_xmit_frag = -1;
status = rpcint_binding_handle(result,
ndr_table,
remote_address,
local_address,
session_info,
msg_ctx,
&result->binding_handle);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(result);
return status;
}
*presult = result;
return NT_STATUS_OK;
}
/****************************************************************************
* External pipes functions
***************************************************************************/
NTSTATUS make_external_rpc_pipe(TALLOC_CTX *mem_ctx,
const char *pipe_name,
const struct tsocket_address *remote_client_address,
const struct tsocket_address *local_server_address,
const struct auth_session_info *session_info,
struct npa_state **pnpa)
{
TALLOC_CTX *tmp_ctx = talloc_stackframe();
struct auth_session_info_transport *session_info_t;
struct tevent_context *ev_ctx;
struct tevent_req *subreq;
const char *socket_np_dir;
const char *socket_dir;
struct npa_state *npa;
int sys_errno;
NTSTATUS status;
int rc = -1;
bool ok;
npa = npa_state_init(tmp_ctx);
if (npa == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
socket_dir = lp_parm_const_string(GLOBAL_SECTION_SNUM,
"external_rpc_pipe",
"socket_dir",
lp_ncalrpc_dir());
if (socket_dir == NULL) {
DEBUG(0, ("external_rpc_pipe: socket_dir not set\n"));
status = NT_STATUS_PIPE_NOT_AVAILABLE;
goto out;
}
socket_np_dir = talloc_asprintf(tmp_ctx, "%s/np", socket_dir);
if (socket_np_dir == NULL) {
DEBUG(0, ("talloc_asprintf failed\n"));
status = NT_STATUS_NO_MEMORY;
goto out;
}
session_info_t = talloc_zero(tmp_ctx,
struct auth_session_info_transport);
if (session_info_t == NULL) {
DEBUG(0, ("talloc failed\n"));
status = NT_STATUS_NO_MEMORY;
goto out;
}
session_info_t->session_info = copy_session_info(session_info_t,
session_info);
if (session_info_t->session_info == NULL) {
DEBUG(0, ("copy_session_info failed\n"));
status = NT_STATUS_NO_MEMORY;
goto out;
}
ev_ctx = samba_tevent_context_init(tmp_ctx);
if (ev_ctx == NULL) {
DEBUG(0, ("samba_tevent_context_init failed\n"));
status = NT_STATUS_NO_MEMORY;
goto out;
}
become_root();
subreq = tstream_npa_connect_send(tmp_ctx,
ev_ctx,
socket_np_dir,
pipe_name,
remote_client_address,
NULL, /* client_name */
local_server_address,
NULL, /* server_name */
session_info_t);
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, session_info_t->session_info->info->domain_name,
session_info_t->session_info->info->account_name));
status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
goto out;
}
ok = tevent_req_poll(subreq, ev_ctx);
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,
session_info_t->session_info->info->domain_name,
session_info_t->session_info->info->account_name,
strerror(errno)));
status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
goto out;
}
rc = tstream_npa_connect_recv(subreq,
&sys_errno,
npa,
&npa->stream,
&npa->file_type,
&npa->device_state,
&npa->allocation_size);
talloc_free(subreq);
if (rc != 0) {
int l = 1;
if (errno == ENOENT) {
l = 2;
}
DEBUG(l, ("tstream_npa_connect_recv to %s for pipe %s and "
"user %s\\%s failed: %s\n",
socket_np_dir,
pipe_name,
session_info_t->session_info->info->domain_name,
session_info_t->session_info->info->account_name,
strerror(sys_errno)));
status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
goto out;
}
*pnpa = talloc_steal(mem_ctx, npa);
status = NT_STATUS_OK;
out:
talloc_free(tmp_ctx);
return status;
}
struct np_proxy_state *make_external_rpc_pipe_p(TALLOC_CTX *mem_ctx,
const char *pipe_name,
const struct tsocket_address *remote_client_address,
const struct tsocket_address *local_server_address,
const struct auth_session_info *session_info)
{
struct np_proxy_state *result;
char *socket_np_dir;
const char *socket_dir;
struct tevent_context *ev;
struct tevent_req *subreq;
struct auth_session_info_transport *session_info_t;
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 = samba_tevent_context_init(talloc_tos());
if (ev == NULL) {
DEBUG(0, ("samba_tevent_context_init failed\n"));
goto fail;
}
socket_dir = lp_parm_const_string(
GLOBAL_SECTION_SNUM, "external_rpc_pipe", "socket_dir",
lp_ncalrpc_dir());
if (socket_dir == NULL) {
DEBUG(0, ("external_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;
}
session_info_t = talloc_zero(talloc_tos(), struct auth_session_info_transport);
if (session_info_t == NULL) {
DEBUG(0, ("talloc failed\n"));
goto fail;
}
session_info_t->session_info = copy_session_info(session_info_t,
session_info);
if (session_info_t->session_info == NULL) {
DEBUG(0, ("copy_session_info failed\n"));
goto fail;
}
become_root();
subreq = tstream_npa_connect_send(talloc_tos(), ev,
socket_np_dir,
pipe_name,
remote_client_address,
NULL, /* client_name */
local_server_address,
NULL, /* server_name */
session_info_t);
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, session_info_t->session_info->info->domain_name,
session_info_t->session_info->info->account_name));
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, session_info_t->session_info->info->domain_name,
session_info_t->session_info->info->account_name,
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) {
int l = 1;
if (errno == ENOENT) {
l = 2;
}
DEBUG(l, ("tstream_npa_connect_recv to %s for pipe %s and "
"user %s\\%s failed: %s\n",
socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
session_info_t->session_info->info->account_name,
strerror(sys_errno)));
goto fail;
}
return result;
fail:
TALLOC_FREE(result);
return NULL;
}
static NTSTATUS rpc_pipe_open_external(TALLOC_CTX *mem_ctx,
const char *pipe_name,
const struct ndr_interface_table *table,
const struct auth_session_info *session_info,
const struct tsocket_address *remote_client_address,
const struct tsocket_address *local_server_address,
struct rpc_pipe_client **_result)
{
struct rpc_pipe_client *result = NULL;
struct np_proxy_state *proxy_state = NULL;
struct pipe_auth_data *auth;
struct tsocket_address *remote_client_addr;
struct tsocket_address *local_server_addr;
NTSTATUS status;
int ret;
if (local_server_address == NULL) {
/* this is an internal connection, fake up ip addresses */
ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
NULL, 0, &local_server_addr);
if (ret) {
return NT_STATUS_NO_MEMORY;
}
local_server_address = local_server_addr;
}
if (remote_client_address == NULL) {
/* this is an internal connection, fake up ip addresses */
ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
NULL, 0, &remote_client_addr);
if (ret) {
return NT_STATUS_NO_MEMORY;
}
remote_client_address = remote_client_addr;
}
proxy_state = make_external_rpc_pipe_p(mem_ctx, pipe_name,
remote_client_address,
local_server_address,
session_info);
if (!proxy_state) {
DEBUG(1, ("Unable to make proxy_state for connection to %s.\n", pipe_name));
return NT_STATUS_UNSUCCESSFUL;
}
result = talloc_zero(mem_ctx, struct rpc_pipe_client);
if (result == NULL) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
result->abstract_syntax = table->syntax_id;
result->transfer_syntax = ndr_transfer_syntax_ndr;
result->desthost = get_myname(result);
result->srv_name_slash = talloc_asprintf_strupper_m(
result, "\\\\%s", result->desthost);
if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
status = rpc_transport_tstream_init(result,
&proxy_state->npipe,
&result->transport);
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
result->binding_handle = rpccli_bh_create(result, NULL, table);
if (result->binding_handle == NULL) {
status = NT_STATUS_NO_MEMORY;
DEBUG(0, ("Failed to create binding handle.\n"));
goto done;
}
result->auth = talloc_zero(result, struct pipe_auth_data);
if (!result->auth) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
result->auth->auth_type = DCERPC_AUTH_TYPE_NONE;
result->auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
result->auth->auth_context_id = 0;
status = rpccli_anon_bind_data(result, &auth);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to initialize anonymous bind.\n"));
goto done;
}
status = rpc_pipe_bind(result, auth);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to bind external pipe.\n"));
goto done;
}
done:
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(result);
}
TALLOC_FREE(proxy_state);
*_result = result;
return status;
}
/**
* @brief Create a new RPC client context which uses a local dispatch function
* or a remote transport, depending on rpc_server configuration for the
* specific service.
*
* @param[in] mem_ctx The memory context to use.
*
* @param[in] abstract_syntax Normally the syntax_id of the autogenerated
* ndr_table_<name>.
*
* @param[in] serversupplied_info The server supplied authentication function.
*
* @param[in] remote_address The client address information.
*
* @param[in] msg_ctx The messaging context to use.
*
* @param[out] presult A pointer to store the connected rpc client pipe.
*
* @return NT_STATUS_OK on success, a corresponding NT status if an
* error occurred.
*
* @code
* struct rpc_pipe_client *winreg_pipe;
* NTSTATUS status;
*
* status = rpc_pipe_open_interface(tmp_ctx,
* &ndr_table_winreg.syntax_id,
* p->session_info,
* remote_address,
* &winreg_pipe);
* @endcode
*/
NTSTATUS rpc_pipe_open_interface(TALLOC_CTX *mem_ctx,
const struct ndr_interface_table *table,
const struct auth_session_info *session_info,
const struct tsocket_address *remote_address,
const struct tsocket_address *local_address,
struct messaging_context *msg_ctx,
struct rpc_pipe_client **cli_pipe)
{
struct rpc_pipe_client *cli = NULL;
enum rpc_service_mode_e pipe_mode;
const char *pipe_name;
NTSTATUS status;
TALLOC_CTX *tmp_ctx;
if (cli_pipe != NULL) {
if (rpccli_is_connected(*cli_pipe)) {
return NT_STATUS_OK;
} else {
TALLOC_FREE(*cli_pipe);
}
}
tmp_ctx = talloc_stackframe();
if (tmp_ctx == NULL) {
return NT_STATUS_NO_MEMORY;
}
pipe_name = dcerpc_default_transport_endpoint(mem_ctx, NCACN_NP, table);
if (pipe_name == NULL) {
DEBUG(1, ("Unable to find pipe name to forward %s to.\n", table->name));
status = NT_STATUS_INVALID_PARAMETER;
goto done;
}
while (pipe_name[0] == '\\') {
pipe_name++;
}
DEBUG(5, ("Connecting to %s pipe.\n", pipe_name));
pipe_mode = rpc_service_mode(pipe_name);
switch (pipe_mode) {
case RPC_SERVICE_MODE_EMBEDDED:
status = rpc_pipe_open_internal(tmp_ctx,
table, session_info,
remote_address, local_address,
msg_ctx,
&cli);
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
break;
case RPC_SERVICE_MODE_EXTERNAL:
/* It would be nice to just use rpc_pipe_open_ncalrpc() but
* for now we need to use the special proxy setup to connect
* to spoolssd. */
status = rpc_pipe_open_external(tmp_ctx,
pipe_name, table,
session_info,
remote_address, local_address,
&cli);
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
break;
case RPC_SERVICE_MODE_DISABLED:
status = NT_STATUS_NOT_IMPLEMENTED;
DEBUG(0, ("Service pipe %s is disabled in config file: %s",
pipe_name, nt_errstr(status)));
goto done;
}
status = NT_STATUS_OK;
done:
if (NT_STATUS_IS_OK(status) && cli_pipe != NULL) {
*cli_pipe = talloc_move(mem_ctx, &cli);
}
TALLOC_FREE(tmp_ctx);
return status;
}