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/*
* Unix SMB/CIFS implementation.
* RPC Pipe client / server routines for mdssvc
* Copyright (C) Ralph Boehme 2014
*
* 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 "messages.h"
#include "ntdomain.h"
#include "rpc_server/rpc_server.h"
#include "rpc_server/rpc_config.h"
#include "rpc_server/mdssvc/srv_mdssvc_nt.h"
#include "libcli/security/security_token.h"
#include "libcli/security/dom_sid.h"
#include "gen_ndr/auth.h"
#include "mdssvc.h"
#include "smbd/globals.h"
#include "librpc/rpc/dcesrv_core.h"
#include "librpc/gen_ndr/ndr_mdssvc.h"
#include "librpc/gen_ndr/ndr_mdssvc_scompat.h"
#include "lib/global_contexts.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_SRV
static NTSTATUS create_mdssvc_policy_handle(TALLOC_CTX *mem_ctx,
struct pipes_struct *p,
int snum,
const char *sharename,
const char *path,
struct policy_handle *handle)
{
struct dcesrv_call_state *dce_call = p->dce_call;
struct auth_session_info *session_info =
dcesrv_call_session_info(dce_call);
struct mds_ctx *mds_ctx;
NTSTATUS status;
ZERO_STRUCTP(handle);
status = mds_init_ctx(mem_ctx,
messaging_tevent_context(p->msg_ctx),
p->msg_ctx,
session_info,
snum,
sharename,
path,
&mds_ctx);
if (!NT_STATUS_IS_OK(status)) {
DBG_DEBUG("mds_init_ctx() path [%s] failed: %s\n",
path, nt_errstr(status));
return status;
}
if (!create_policy_hnd(p, handle, 0, mds_ctx)) {
talloc_free(mds_ctx);
ZERO_STRUCTP(handle);
return NT_STATUS_NO_MEMORY;
}
return NT_STATUS_OK;
}
void _mdssvc_open(struct pipes_struct *p, struct mdssvc_open *r)
{
const struct loadparm_substitution *lp_sub =
loadparm_s3_global_substitution();
int snum;
char *outpath = discard_const_p(char, r->out.share_path);
char *fake_path = NULL;
char *path;
NTSTATUS status;
DBG_DEBUG("[%s]\n", r->in.share_name);
*r->out.device_id = *r->in.device_id;
*r->out.unkn2 = *r->in.unkn2;
*r->out.unkn3 = *r->in.unkn3;
outpath[0] = '\0';
snum = lp_servicenumber(r->in.share_name);
if (!VALID_SNUM(snum)) {
return;
}
path = lp_path(talloc_tos(), lp_sub, snum);
if (path == NULL) {
DBG_ERR("Couldn't create path for %s\n",
r->in.share_name);
p->fault_state = DCERPC_FAULT_CANT_PERFORM;
return;
}
fake_path = talloc_asprintf(p->mem_ctx, "/%s", r->in.share_name);
if (fake_path == NULL) {
DBG_ERR("Couldn't create fake share path for %s\n",
r->in.share_name);
talloc_free(path);
p->fault_state = DCERPC_FAULT_CANT_PERFORM;
return;
}
status = create_mdssvc_policy_handle(p->mem_ctx, p,
snum,
r->in.share_name,
path,
r->out.handle);
if (NT_STATUS_EQUAL(status, NT_STATUS_WRONG_VOLUME)) {
ZERO_STRUCTP(r->out.handle);
talloc_free(path);
talloc_free(fake_path);
return;
}
if (!NT_STATUS_IS_OK(status)) {
DBG_ERR("Couldn't create policy handle for %s\n",
r->in.share_name);
talloc_free(path);
talloc_free(fake_path);
p->fault_state = DCERPC_FAULT_CANT_PERFORM;
return;
}
strlcpy(outpath, fake_path, 1024);
talloc_free(path);
talloc_free(fake_path);
return;
}
void _mdssvc_unknown1(struct pipes_struct *p, struct mdssvc_unknown1 *r)
{
struct mds_ctx *mds_ctx;
NTSTATUS status;
mds_ctx = find_policy_by_hnd(p,
r->in.handle,
DCESRV_HANDLE_ANY,
struct mds_ctx,
&status);
if (!NT_STATUS_IS_OK(status)) {
if (ndr_policy_handle_empty(r->in.handle)) {
p->fault_state = 0;
} else {
p->fault_state = DCERPC_NCA_S_PROTO_ERROR;
}
*r->out.status = 0;
*r->out.flags = 0;
*r->out.unkn7 = 0;
return;
}
DEBUG(10, ("%s: path: %s\n", __func__, mds_ctx->spath));
*r->out.status = 0;
*r->out.flags = 0x6b000001;
*r->out.unkn7 = 0;
return;
}
void _mdssvc_cmd(struct pipes_struct *p, struct mdssvc_cmd *r)
{
struct dcesrv_call_state *dce_call = p->dce_call;
struct auth_session_info *session_info =
dcesrv_call_session_info(dce_call);
bool ok;
struct mds_ctx *mds_ctx;
NTSTATUS status;
mds_ctx = find_policy_by_hnd(p,
r->in.handle,
DCESRV_HANDLE_ANY,
struct mds_ctx,
&status);
if (!NT_STATUS_IS_OK(status)) {
if (ndr_policy_handle_empty(r->in.handle)) {
p->fault_state = 0;
} else {
p->fault_state = DCERPC_NCA_S_PROTO_ERROR;
}
r->out.response_blob->size = 0;
*r->out.fragment = 0;
*r->out.unkn9 = 0;
return;
}
DEBUG(10, ("%s: path: %s\n", __func__, mds_ctx->spath));
ok = security_token_is_sid(session_info->security_token,
&mds_ctx->sid);
if (!ok) {
struct dom_sid_buf buf;
DBG_WARNING("not the same sid: %s\n",
dom_sid_str_buf(&mds_ctx->sid, &buf));
p->fault_state = DCERPC_FAULT_ACCESS_DENIED;
return;
}
if (geteuid() != mds_ctx->uid) {
DEBUG(0, ("uid mismatch: %d/%d\n", geteuid(), mds_ctx->uid));
smb_panic("uid mismatch");
}
if (r->in.request_blob.size > MAX_SL_FRAGMENT_SIZE) {
DEBUG(1, ("%s: request size too large\n", __func__));
p->fault_state = DCERPC_FAULT_CANT_PERFORM;
return;
}
if (r->in.request_blob.length > MAX_SL_FRAGMENT_SIZE) {
DEBUG(1, ("%s: request length too large\n", __func__));
p->fault_state = DCERPC_FAULT_CANT_PERFORM;
return;
}
if (r->in.max_fragment_size1 > MAX_SL_FRAGMENT_SIZE) {
DEBUG(1, ("%s: request fragment size too large: %u\n",
__func__, (unsigned)r->in.max_fragment_size1));
p->fault_state = DCERPC_FAULT_CANT_PERFORM;
return;
}
/* We currently don't use fragmentation at the mdssvc RPC layer */
*r->out.fragment = 0;
ok = mds_dispatch(mds_ctx,
&r->in.request_blob,
r->out.response_blob,
r->in.max_fragment_size1);
if (ok) {
*r->out.unkn9 = 0;
} else {
/* FIXME: just interpolating from AFP, needs verification */
*r->out.unkn9 = UINT32_MAX;
}
return;
}
void _mdssvc_close(struct pipes_struct *p, struct mdssvc_close *r)
{
struct mds_ctx *mds_ctx;
NTSTATUS status;
mds_ctx = find_policy_by_hnd(p,
r->in.in_handle,
DCESRV_HANDLE_ANY,
struct mds_ctx,
&status);
if (!NT_STATUS_IS_OK(status)) {
DBG_WARNING("invalid handle\n");
if (ndr_policy_handle_empty(r->in.in_handle)) {
p->fault_state = 0;
} else {
p->fault_state = DCERPC_NCA_S_PROTO_ERROR;
}
return;
}
DBG_DEBUG("Close mdssvc handle for path: %s\n", mds_ctx->spath);
TALLOC_FREE(mds_ctx);
*r->out.out_handle = *r->in.in_handle;
close_policy_hnd(p, r->in.in_handle);
*r->out.status = 0;
return;
}
static NTSTATUS mdssvc__op_init_server(struct dcesrv_context *dce_ctx,
const struct dcesrv_endpoint_server *ep_server);
static NTSTATUS mdssvc__op_shutdown_server(struct dcesrv_context *dce_ctx,
const struct dcesrv_endpoint_server *ep_server);
#define DCESRV_INTERFACE_MDSSVC_INIT_SERVER \
mdssvc_init_server
#define DCESRV_INTERFACE_MDSSVC_SHUTDOWN_SERVER \
mdssvc_shutdown_server
static NTSTATUS mdssvc_init_server(struct dcesrv_context *dce_ctx,
const struct dcesrv_endpoint_server *ep_server)
{
struct messaging_context *msg_ctx = global_messaging_context();
bool ok;
ok = mds_init(msg_ctx);
if (!ok) {
return NT_STATUS_UNSUCCESSFUL;
}
return mdssvc__op_init_server(dce_ctx, ep_server);
}
static NTSTATUS mdssvc_shutdown_server(struct dcesrv_context *dce_ctx,
const struct dcesrv_endpoint_server *ep_server)
{
mds_shutdown();
return mdssvc__op_shutdown_server(dce_ctx, ep_server);
}
/* include the generated boilerplate */
#include "librpc/gen_ndr/ndr_mdssvc_scompat.c"
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