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5ec284d152
Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org> Autobuild-User: Andrew Tridgell <tridge@samba.org> Autobuild-Date: Thu Feb 24 02:42:37 CET 2011 on sn-devel-104
1721 lines
49 KiB
C
1721 lines
49 KiB
C
/*
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Unix SMB/CIFS implementation.
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server side dcerpc core code
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Copyright (C) Andrew Tridgell 2003-2005
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Copyright (C) Stefan (metze) Metzmacher 2004-2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "auth/auth.h"
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#include "auth/gensec/gensec.h"
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#include "../lib/util/dlinklist.h"
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#include "rpc_server/dcerpc_server.h"
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#include "rpc_server/dcerpc_server_proto.h"
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#include "rpc_server/common/proto.h"
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#include "librpc/rpc/dcerpc_proto.h"
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#include "system/filesys.h"
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#include "libcli/security/security.h"
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#include "param/param.h"
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#include "../lib/tsocket/tsocket.h"
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#include "../libcli/named_pipe_auth/npa_tstream.h"
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#include "smbd/service_stream.h"
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#include "../lib/tsocket/tsocket.h"
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#include "lib/socket/socket.h"
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#include "smbd/process_model.h"
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#include "lib/messaging/irpc.h"
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#include "librpc/rpc/rpc_common.h"
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/* this is only used when the client asks for an unknown interface */
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#define DUMMY_ASSOC_GROUP 0x0FFFFFFF
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extern const struct dcesrv_interface dcesrv_mgmt_interface;
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/*
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find an association group given a assoc_group_id
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*/
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static struct dcesrv_assoc_group *dcesrv_assoc_group_find(struct dcesrv_context *dce_ctx,
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uint32_t id)
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{
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void *id_ptr;
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id_ptr = idr_find(dce_ctx->assoc_groups_idr, id);
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if (id_ptr == NULL) {
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return NULL;
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}
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return talloc_get_type_abort(id_ptr, struct dcesrv_assoc_group);
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}
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/*
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take a reference to an existing association group
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*/
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static struct dcesrv_assoc_group *dcesrv_assoc_group_reference(TALLOC_CTX *mem_ctx,
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struct dcesrv_context *dce_ctx,
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uint32_t id)
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{
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struct dcesrv_assoc_group *assoc_group;
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assoc_group = dcesrv_assoc_group_find(dce_ctx, id);
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if (assoc_group == NULL) {
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DEBUG(0,(__location__ ": Failed to find assoc_group 0x%08x\n", id));
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return NULL;
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}
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return talloc_reference(mem_ctx, assoc_group);
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}
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static int dcesrv_assoc_group_destructor(struct dcesrv_assoc_group *assoc_group)
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{
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int ret;
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ret = idr_remove(assoc_group->dce_ctx->assoc_groups_idr, assoc_group->id);
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if (ret != 0) {
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DEBUG(0,(__location__ ": Failed to remove assoc_group 0x%08x\n",
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assoc_group->id));
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}
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return 0;
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}
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/*
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allocate a new association group
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*/
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static struct dcesrv_assoc_group *dcesrv_assoc_group_new(TALLOC_CTX *mem_ctx,
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struct dcesrv_context *dce_ctx)
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{
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struct dcesrv_assoc_group *assoc_group;
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int id;
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assoc_group = talloc_zero(mem_ctx, struct dcesrv_assoc_group);
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if (assoc_group == NULL) {
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return NULL;
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}
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id = idr_get_new_random(dce_ctx->assoc_groups_idr, assoc_group, UINT16_MAX);
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if (id == -1) {
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talloc_free(assoc_group);
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DEBUG(0,(__location__ ": Out of association groups!\n"));
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return NULL;
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}
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assoc_group->id = id;
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assoc_group->dce_ctx = dce_ctx;
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talloc_set_destructor(assoc_group, dcesrv_assoc_group_destructor);
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return assoc_group;
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}
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/*
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see if two endpoints match
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*/
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static bool endpoints_match(const struct dcerpc_binding *ep1,
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const struct dcerpc_binding *ep2)
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{
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if (ep1->transport != ep2->transport) {
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return false;
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}
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if (!ep1->endpoint || !ep2->endpoint) {
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return ep1->endpoint == ep2->endpoint;
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}
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if (strcasecmp(ep1->endpoint, ep2->endpoint) != 0)
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return false;
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return true;
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}
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/*
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find an endpoint in the dcesrv_context
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*/
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static struct dcesrv_endpoint *find_endpoint(struct dcesrv_context *dce_ctx,
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const struct dcerpc_binding *ep_description)
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{
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struct dcesrv_endpoint *ep;
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for (ep=dce_ctx->endpoint_list; ep; ep=ep->next) {
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if (endpoints_match(ep->ep_description, ep_description)) {
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return ep;
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}
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}
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return NULL;
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}
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/*
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find a registered context_id from a bind or alter_context
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*/
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static struct dcesrv_connection_context *dcesrv_find_context(struct dcesrv_connection *conn,
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uint32_t context_id)
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{
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struct dcesrv_connection_context *c;
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for (c=conn->contexts;c;c=c->next) {
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if (c->context_id == context_id) return c;
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}
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return NULL;
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}
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/*
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see if a uuid and if_version match to an interface
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*/
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static bool interface_match(const struct dcesrv_interface *if1,
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const struct dcesrv_interface *if2)
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{
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return (if1->syntax_id.if_version == if2->syntax_id.if_version &&
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GUID_equal(&if1->syntax_id.uuid, &if2->syntax_id.uuid));
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}
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/*
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find the interface operations on an endpoint
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*/
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static const struct dcesrv_interface *find_interface(const struct dcesrv_endpoint *endpoint,
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const struct dcesrv_interface *iface)
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{
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struct dcesrv_if_list *ifl;
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for (ifl=endpoint->interface_list; ifl; ifl=ifl->next) {
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if (interface_match(&(ifl->iface), iface)) {
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return &(ifl->iface);
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}
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}
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return NULL;
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}
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/*
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see if a uuid and if_version match to an interface
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*/
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static bool interface_match_by_uuid(const struct dcesrv_interface *iface,
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const struct GUID *uuid, uint32_t if_version)
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{
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return (iface->syntax_id.if_version == if_version &&
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GUID_equal(&iface->syntax_id.uuid, uuid));
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}
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/*
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find the interface operations on an endpoint by uuid
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*/
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static const struct dcesrv_interface *find_interface_by_uuid(const struct dcesrv_endpoint *endpoint,
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const struct GUID *uuid, uint32_t if_version)
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{
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struct dcesrv_if_list *ifl;
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for (ifl=endpoint->interface_list; ifl; ifl=ifl->next) {
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if (interface_match_by_uuid(&(ifl->iface), uuid, if_version)) {
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return &(ifl->iface);
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}
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}
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return NULL;
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}
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/*
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find the earlier parts of a fragmented call awaiting reassembily
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*/
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static struct dcesrv_call_state *dcesrv_find_fragmented_call(struct dcesrv_connection *dce_conn, uint16_t call_id)
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{
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struct dcesrv_call_state *c;
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for (c=dce_conn->incoming_fragmented_call_list;c;c=c->next) {
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if (c->pkt.call_id == call_id) {
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return c;
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}
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}
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return NULL;
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}
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/*
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register an interface on an endpoint
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*/
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_PUBLIC_ NTSTATUS dcesrv_interface_register(struct dcesrv_context *dce_ctx,
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const char *ep_name,
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const struct dcesrv_interface *iface,
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const struct security_descriptor *sd)
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{
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struct dcesrv_endpoint *ep;
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struct dcesrv_if_list *ifl;
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struct dcerpc_binding *binding;
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bool add_ep = false;
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NTSTATUS status;
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status = dcerpc_parse_binding(dce_ctx, ep_name, &binding);
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if (NT_STATUS_IS_ERR(status)) {
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DEBUG(0, ("Trouble parsing binding string '%s'\n", ep_name));
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return status;
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}
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/* check if this endpoint exists
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*/
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if ((ep=find_endpoint(dce_ctx, binding))==NULL) {
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ep = talloc(dce_ctx, struct dcesrv_endpoint);
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if (!ep) {
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return NT_STATUS_NO_MEMORY;
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}
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ZERO_STRUCTP(ep);
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ep->ep_description = talloc_reference(ep, binding);
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add_ep = true;
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/* add mgmt interface */
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ifl = talloc(dce_ctx, struct dcesrv_if_list);
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if (!ifl) {
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return NT_STATUS_NO_MEMORY;
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}
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memcpy(&(ifl->iface), &dcesrv_mgmt_interface,
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sizeof(struct dcesrv_interface));
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DLIST_ADD(ep->interface_list, ifl);
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}
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/* see if the interface is already registered on te endpoint */
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if (find_interface(ep, iface)!=NULL) {
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DEBUG(0,("dcesrv_interface_register: interface '%s' already registered on endpoint '%s'\n",
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iface->name, ep_name));
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return NT_STATUS_OBJECT_NAME_COLLISION;
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}
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/* talloc a new interface list element */
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ifl = talloc(dce_ctx, struct dcesrv_if_list);
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if (!ifl) {
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return NT_STATUS_NO_MEMORY;
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}
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/* copy the given interface struct to the one on the endpoints interface list */
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memcpy(&(ifl->iface),iface, sizeof(struct dcesrv_interface));
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/* if we have a security descriptor given,
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* we should see if we can set it up on the endpoint
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*/
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if (sd != NULL) {
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/* if there's currently no security descriptor given on the endpoint
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* we try to set it
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*/
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if (ep->sd == NULL) {
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ep->sd = security_descriptor_copy(dce_ctx, sd);
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}
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/* if now there's no security descriptor given on the endpoint
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* something goes wrong, either we failed to copy the security descriptor
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* or there was already one on the endpoint
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*/
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if (ep->sd != NULL) {
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DEBUG(0,("dcesrv_interface_register: interface '%s' failed to setup a security descriptor\n"
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" on endpoint '%s'\n",
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iface->name, ep_name));
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if (add_ep) free(ep);
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free(ifl);
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return NT_STATUS_OBJECT_NAME_COLLISION;
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}
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}
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/* finally add the interface on the endpoint */
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DLIST_ADD(ep->interface_list, ifl);
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/* if it's a new endpoint add it to the dcesrv_context */
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if (add_ep) {
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DLIST_ADD(dce_ctx->endpoint_list, ep);
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}
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DEBUG(4,("dcesrv_interface_register: interface '%s' registered on endpoint '%s'\n",
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iface->name, ep_name));
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return NT_STATUS_OK;
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}
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NTSTATUS dcesrv_inherited_session_key(struct dcesrv_connection *p,
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DATA_BLOB *session_key)
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{
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if (p->auth_state.session_info->session_key.length) {
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*session_key = p->auth_state.session_info->session_key;
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return NT_STATUS_OK;
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}
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return NT_STATUS_NO_USER_SESSION_KEY;
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}
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/*
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fetch the user session key - may be default (above) or the SMB session key
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The key is always truncated to 16 bytes
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*/
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_PUBLIC_ NTSTATUS dcesrv_fetch_session_key(struct dcesrv_connection *p,
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DATA_BLOB *session_key)
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{
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NTSTATUS status = p->auth_state.session_key(p, session_key);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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session_key->length = MIN(session_key->length, 16);
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return NT_STATUS_OK;
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}
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/*
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connect to a dcerpc endpoint
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*/
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_PUBLIC_ NTSTATUS dcesrv_endpoint_connect(struct dcesrv_context *dce_ctx,
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TALLOC_CTX *mem_ctx,
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const struct dcesrv_endpoint *ep,
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struct auth_session_info *session_info,
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struct tevent_context *event_ctx,
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struct messaging_context *msg_ctx,
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struct server_id server_id,
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uint32_t state_flags,
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struct dcesrv_connection **_p)
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{
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struct dcesrv_connection *p;
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if (!session_info) {
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return NT_STATUS_ACCESS_DENIED;
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}
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p = talloc(mem_ctx, struct dcesrv_connection);
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NT_STATUS_HAVE_NO_MEMORY(p);
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if (!talloc_reference(p, session_info)) {
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talloc_free(p);
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return NT_STATUS_NO_MEMORY;
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}
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p->dce_ctx = dce_ctx;
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p->endpoint = ep;
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p->contexts = NULL;
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p->call_list = NULL;
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p->packet_log_dir = lpcfg_lockdir(dce_ctx->lp_ctx);
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p->incoming_fragmented_call_list = NULL;
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p->pending_call_list = NULL;
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p->cli_max_recv_frag = 0;
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p->partial_input = data_blob(NULL, 0);
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p->auth_state.auth_info = NULL;
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p->auth_state.gensec_security = NULL;
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p->auth_state.session_info = session_info;
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p->auth_state.session_key = dcesrv_generic_session_key;
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p->event_ctx = event_ctx;
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p->msg_ctx = msg_ctx;
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p->server_id = server_id;
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p->processing = false;
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p->state_flags = state_flags;
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ZERO_STRUCT(p->transport);
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*_p = p;
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return NT_STATUS_OK;
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}
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/*
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move a call from an existing linked list to the specified list. This
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prevents bugs where we forget to remove the call from a previous
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list when moving it.
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*/
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static void dcesrv_call_set_list(struct dcesrv_call_state *call,
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enum dcesrv_call_list list)
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{
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switch (call->list) {
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case DCESRV_LIST_NONE:
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break;
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case DCESRV_LIST_CALL_LIST:
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DLIST_REMOVE(call->conn->call_list, call);
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break;
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case DCESRV_LIST_FRAGMENTED_CALL_LIST:
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DLIST_REMOVE(call->conn->incoming_fragmented_call_list, call);
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break;
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case DCESRV_LIST_PENDING_CALL_LIST:
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DLIST_REMOVE(call->conn->pending_call_list, call);
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break;
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}
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call->list = list;
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switch (list) {
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case DCESRV_LIST_NONE:
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break;
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case DCESRV_LIST_CALL_LIST:
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DLIST_ADD_END(call->conn->call_list, call, struct dcesrv_call_state *);
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break;
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case DCESRV_LIST_FRAGMENTED_CALL_LIST:
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DLIST_ADD_END(call->conn->incoming_fragmented_call_list, call, struct dcesrv_call_state *);
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break;
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case DCESRV_LIST_PENDING_CALL_LIST:
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DLIST_ADD_END(call->conn->pending_call_list, call, struct dcesrv_call_state *);
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break;
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}
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}
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/*
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return a dcerpc bind_nak
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*/
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static NTSTATUS dcesrv_bind_nak(struct dcesrv_call_state *call, uint32_t reason)
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{
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struct ncacn_packet pkt;
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struct data_blob_list_item *rep;
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NTSTATUS status;
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/* setup a bind_nak */
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dcesrv_init_hdr(&pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx));
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pkt.auth_length = 0;
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pkt.call_id = call->pkt.call_id;
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pkt.ptype = DCERPC_PKT_BIND_NAK;
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pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
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pkt.u.bind_nak.reject_reason = reason;
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if (pkt.u.bind_nak.reject_reason == DECRPC_BIND_PROTOCOL_VERSION_NOT_SUPPORTED) {
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pkt.u.bind_nak.versions.v.num_versions = 0;
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}
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rep = talloc(call, struct data_blob_list_item);
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if (!rep) {
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return NT_STATUS_NO_MEMORY;
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}
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status = ncacn_push_auth(&rep->blob, call, &pkt, NULL);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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dcerpc_set_frag_length(&rep->blob, rep->blob.length);
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DLIST_ADD_END(call->replies, rep, struct data_blob_list_item *);
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dcesrv_call_set_list(call, DCESRV_LIST_CALL_LIST);
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if (call->conn->call_list && call->conn->call_list->replies) {
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if (call->conn->transport.report_output_data) {
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call->conn->transport.report_output_data(call->conn);
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}
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}
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return NT_STATUS_OK;
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}
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static int dcesrv_connection_context_destructor(struct dcesrv_connection_context *c)
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{
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DLIST_REMOVE(c->conn->contexts, c);
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|
|
|
if (c->iface && c->iface->unbind) {
|
|
c->iface->unbind(c, c->iface);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
handle a bind request
|
|
*/
|
|
static NTSTATUS dcesrv_bind(struct dcesrv_call_state *call)
|
|
{
|
|
uint32_t if_version, transfer_syntax_version;
|
|
struct GUID uuid, *transfer_syntax_uuid;
|
|
struct ncacn_packet pkt;
|
|
struct data_blob_list_item *rep;
|
|
NTSTATUS status;
|
|
uint32_t result=0, reason=0;
|
|
uint32_t context_id;
|
|
const struct dcesrv_interface *iface;
|
|
uint32_t extra_flags = 0;
|
|
|
|
/*
|
|
if provided, check the assoc_group is valid
|
|
*/
|
|
if (call->pkt.u.bind.assoc_group_id != 0 &&
|
|
lpcfg_parm_bool(call->conn->dce_ctx->lp_ctx, NULL, "dcesrv","assoc group checking", true) &&
|
|
dcesrv_assoc_group_find(call->conn->dce_ctx, call->pkt.u.bind.assoc_group_id) == NULL) {
|
|
return dcesrv_bind_nak(call, 0);
|
|
}
|
|
|
|
if (call->pkt.u.bind.num_contexts < 1 ||
|
|
call->pkt.u.bind.ctx_list[0].num_transfer_syntaxes < 1) {
|
|
return dcesrv_bind_nak(call, 0);
|
|
}
|
|
|
|
context_id = call->pkt.u.bind.ctx_list[0].context_id;
|
|
|
|
/* you can't bind twice on one context */
|
|
if (dcesrv_find_context(call->conn, context_id) != NULL) {
|
|
return dcesrv_bind_nak(call, 0);
|
|
}
|
|
|
|
if_version = call->pkt.u.bind.ctx_list[0].abstract_syntax.if_version;
|
|
uuid = call->pkt.u.bind.ctx_list[0].abstract_syntax.uuid;
|
|
|
|
transfer_syntax_version = call->pkt.u.bind.ctx_list[0].transfer_syntaxes[0].if_version;
|
|
transfer_syntax_uuid = &call->pkt.u.bind.ctx_list[0].transfer_syntaxes[0].uuid;
|
|
if (!GUID_equal(&ndr_transfer_syntax.uuid, transfer_syntax_uuid) != 0 ||
|
|
ndr_transfer_syntax.if_version != transfer_syntax_version) {
|
|
char *uuid_str = GUID_string(call, transfer_syntax_uuid);
|
|
/* we only do NDR encoded dcerpc */
|
|
DEBUG(0,("Non NDR transfer syntax requested - %s\n", uuid_str));
|
|
talloc_free(uuid_str);
|
|
return dcesrv_bind_nak(call, 0);
|
|
}
|
|
|
|
iface = find_interface_by_uuid(call->conn->endpoint, &uuid, if_version);
|
|
if (iface == NULL) {
|
|
char *uuid_str = GUID_string(call, &uuid);
|
|
DEBUG(2,("Request for unknown dcerpc interface %s/%d\n", uuid_str, if_version));
|
|
talloc_free(uuid_str);
|
|
|
|
/* we don't know about that interface */
|
|
result = DCERPC_BIND_PROVIDER_REJECT;
|
|
reason = DCERPC_BIND_REASON_ASYNTAX;
|
|
}
|
|
|
|
if (iface) {
|
|
/* add this context to the list of available context_ids */
|
|
struct dcesrv_connection_context *context = talloc(call->conn,
|
|
struct dcesrv_connection_context);
|
|
if (context == NULL) {
|
|
return dcesrv_bind_nak(call, 0);
|
|
}
|
|
context->conn = call->conn;
|
|
context->iface = iface;
|
|
context->context_id = context_id;
|
|
if (call->pkt.u.bind.assoc_group_id != 0) {
|
|
context->assoc_group = dcesrv_assoc_group_reference(context,
|
|
call->conn->dce_ctx,
|
|
call->pkt.u.bind.assoc_group_id);
|
|
} else {
|
|
context->assoc_group = dcesrv_assoc_group_new(context, call->conn->dce_ctx);
|
|
}
|
|
if (context->assoc_group == NULL) {
|
|
talloc_free(context);
|
|
return dcesrv_bind_nak(call, 0);
|
|
}
|
|
context->private_data = NULL;
|
|
DLIST_ADD(call->conn->contexts, context);
|
|
call->context = context;
|
|
talloc_set_destructor(context, dcesrv_connection_context_destructor);
|
|
|
|
status = iface->bind(call, iface, if_version);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
char *uuid_str = GUID_string(call, &uuid);
|
|
DEBUG(2,("Request for dcerpc interface %s/%d rejected: %s\n",
|
|
uuid_str, if_version, nt_errstr(status)));
|
|
talloc_free(uuid_str);
|
|
/* we don't want to trigger the iface->unbind() hook */
|
|
context->iface = NULL;
|
|
talloc_free(call->context);
|
|
call->context = NULL;
|
|
return dcesrv_bind_nak(call, 0);
|
|
}
|
|
}
|
|
|
|
if (call->conn->cli_max_recv_frag == 0) {
|
|
call->conn->cli_max_recv_frag = MIN(0x2000, call->pkt.u.bind.max_recv_frag);
|
|
}
|
|
|
|
if ((call->pkt.pfc_flags & DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN) &&
|
|
lpcfg_parm_bool(call->conn->dce_ctx->lp_ctx, NULL, "dcesrv","header signing", false)) {
|
|
call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_HEADER_SIGNING;
|
|
extra_flags |= DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN;
|
|
}
|
|
|
|
/* handle any authentication that is being requested */
|
|
if (!dcesrv_auth_bind(call)) {
|
|
talloc_free(call->context);
|
|
call->context = NULL;
|
|
return dcesrv_bind_nak(call, DCERPC_BIND_REASON_INVALID_AUTH_TYPE);
|
|
}
|
|
|
|
/* setup a bind_ack */
|
|
dcesrv_init_hdr(&pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx));
|
|
pkt.auth_length = 0;
|
|
pkt.call_id = call->pkt.call_id;
|
|
pkt.ptype = DCERPC_PKT_BIND_ACK;
|
|
pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | extra_flags;
|
|
pkt.u.bind_ack.max_xmit_frag = call->conn->cli_max_recv_frag;
|
|
pkt.u.bind_ack.max_recv_frag = 0x2000;
|
|
|
|
/*
|
|
make it possible for iface->bind() to specify the assoc_group_id
|
|
This helps the openchange mapiproxy plugin to work correctly.
|
|
|
|
metze
|
|
*/
|
|
if (call->context) {
|
|
pkt.u.bind_ack.assoc_group_id = call->context->assoc_group->id;
|
|
} else {
|
|
pkt.u.bind_ack.assoc_group_id = DUMMY_ASSOC_GROUP;
|
|
}
|
|
|
|
if (iface) {
|
|
/* FIXME: Use pipe name as specified by endpoint instead of interface name */
|
|
pkt.u.bind_ack.secondary_address = talloc_asprintf(call, "\\PIPE\\%s", iface->name);
|
|
} else {
|
|
pkt.u.bind_ack.secondary_address = "";
|
|
}
|
|
pkt.u.bind_ack.num_results = 1;
|
|
pkt.u.bind_ack.ctx_list = talloc(call, struct dcerpc_ack_ctx);
|
|
if (!pkt.u.bind_ack.ctx_list) {
|
|
talloc_free(call->context);
|
|
call->context = NULL;
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
pkt.u.bind_ack.ctx_list[0].result = result;
|
|
pkt.u.bind_ack.ctx_list[0].reason = reason;
|
|
pkt.u.bind_ack.ctx_list[0].syntax = ndr_transfer_syntax;
|
|
pkt.u.bind_ack.auth_info = data_blob(NULL, 0);
|
|
|
|
status = dcesrv_auth_bind_ack(call, &pkt);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
talloc_free(call->context);
|
|
call->context = NULL;
|
|
return dcesrv_bind_nak(call, 0);
|
|
}
|
|
|
|
rep = talloc(call, struct data_blob_list_item);
|
|
if (!rep) {
|
|
talloc_free(call->context);
|
|
call->context = NULL;
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
status = ncacn_push_auth(&rep->blob, call, &pkt,
|
|
call->conn->auth_state.auth_info);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
talloc_free(call->context);
|
|
call->context = NULL;
|
|
return status;
|
|
}
|
|
|
|
dcerpc_set_frag_length(&rep->blob, rep->blob.length);
|
|
|
|
DLIST_ADD_END(call->replies, rep, struct data_blob_list_item *);
|
|
dcesrv_call_set_list(call, DCESRV_LIST_CALL_LIST);
|
|
|
|
if (call->conn->call_list && call->conn->call_list->replies) {
|
|
if (call->conn->transport.report_output_data) {
|
|
call->conn->transport.report_output_data(call->conn);
|
|
}
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
|
|
/*
|
|
handle a auth3 request
|
|
*/
|
|
static NTSTATUS dcesrv_auth3(struct dcesrv_call_state *call)
|
|
{
|
|
/* handle the auth3 in the auth code */
|
|
if (!dcesrv_auth_auth3(call)) {
|
|
return dcesrv_fault(call, DCERPC_FAULT_OTHER);
|
|
}
|
|
|
|
talloc_free(call);
|
|
|
|
/* we don't send a reply to a auth3 request, except by a
|
|
fault */
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
|
|
/*
|
|
handle a bind request
|
|
*/
|
|
static NTSTATUS dcesrv_alter_new_context(struct dcesrv_call_state *call, uint32_t context_id)
|
|
{
|
|
uint32_t if_version, transfer_syntax_version;
|
|
struct dcesrv_connection_context *context;
|
|
const struct dcesrv_interface *iface;
|
|
struct GUID uuid, *transfer_syntax_uuid;
|
|
NTSTATUS status;
|
|
|
|
if_version = call->pkt.u.alter.ctx_list[0].abstract_syntax.if_version;
|
|
uuid = call->pkt.u.alter.ctx_list[0].abstract_syntax.uuid;
|
|
|
|
transfer_syntax_version = call->pkt.u.alter.ctx_list[0].transfer_syntaxes[0].if_version;
|
|
transfer_syntax_uuid = &call->pkt.u.alter.ctx_list[0].transfer_syntaxes[0].uuid;
|
|
if (!GUID_equal(transfer_syntax_uuid, &ndr_transfer_syntax.uuid) ||
|
|
ndr_transfer_syntax.if_version != transfer_syntax_version) {
|
|
/* we only do NDR encoded dcerpc */
|
|
return NT_STATUS_RPC_PROTSEQ_NOT_SUPPORTED;
|
|
}
|
|
|
|
iface = find_interface_by_uuid(call->conn->endpoint, &uuid, if_version);
|
|
if (iface == NULL) {
|
|
char *uuid_str = GUID_string(call, &uuid);
|
|
DEBUG(2,("Request for unknown dcerpc interface %s/%d\n", uuid_str, if_version));
|
|
talloc_free(uuid_str);
|
|
return NT_STATUS_RPC_PROTSEQ_NOT_SUPPORTED;
|
|
}
|
|
|
|
/* add this context to the list of available context_ids */
|
|
context = talloc(call->conn, struct dcesrv_connection_context);
|
|
if (context == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
context->conn = call->conn;
|
|
context->iface = iface;
|
|
context->context_id = context_id;
|
|
if (call->pkt.u.alter.assoc_group_id != 0) {
|
|
context->assoc_group = dcesrv_assoc_group_reference(context,
|
|
call->conn->dce_ctx,
|
|
call->pkt.u.alter.assoc_group_id);
|
|
} else {
|
|
context->assoc_group = dcesrv_assoc_group_new(context, call->conn->dce_ctx);
|
|
}
|
|
if (context->assoc_group == NULL) {
|
|
talloc_free(context);
|
|
call->context = NULL;
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
context->private_data = NULL;
|
|
DLIST_ADD(call->conn->contexts, context);
|
|
call->context = context;
|
|
talloc_set_destructor(context, dcesrv_connection_context_destructor);
|
|
|
|
status = iface->bind(call, iface, if_version);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
/* we don't want to trigger the iface->unbind() hook */
|
|
context->iface = NULL;
|
|
talloc_free(context);
|
|
call->context = NULL;
|
|
return status;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
|
|
/*
|
|
handle a alter context request
|
|
*/
|
|
static NTSTATUS dcesrv_alter(struct dcesrv_call_state *call)
|
|
{
|
|
struct ncacn_packet pkt;
|
|
struct data_blob_list_item *rep;
|
|
NTSTATUS status;
|
|
uint32_t result=0, reason=0;
|
|
uint32_t context_id;
|
|
|
|
/* handle any authentication that is being requested */
|
|
if (!dcesrv_auth_alter(call)) {
|
|
/* TODO: work out the right reject code */
|
|
result = DCERPC_BIND_PROVIDER_REJECT;
|
|
reason = DCERPC_BIND_REASON_ASYNTAX;
|
|
}
|
|
|
|
context_id = call->pkt.u.alter.ctx_list[0].context_id;
|
|
|
|
/* see if they are asking for a new interface */
|
|
if (result == 0) {
|
|
call->context = dcesrv_find_context(call->conn, context_id);
|
|
if (!call->context) {
|
|
status = dcesrv_alter_new_context(call, context_id);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
result = DCERPC_BIND_PROVIDER_REJECT;
|
|
reason = DCERPC_BIND_REASON_ASYNTAX;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (result == 0 &&
|
|
call->pkt.u.alter.assoc_group_id != 0 &&
|
|
lpcfg_parm_bool(call->conn->dce_ctx->lp_ctx, NULL, "dcesrv","assoc group checking", true) &&
|
|
call->pkt.u.alter.assoc_group_id != call->context->assoc_group->id) {
|
|
DEBUG(0,(__location__ ": Failed attempt to use new assoc_group in alter context (0x%08x 0x%08x)\n",
|
|
call->context->assoc_group->id, call->pkt.u.alter.assoc_group_id));
|
|
/* TODO: can they ask for a new association group? */
|
|
result = DCERPC_BIND_PROVIDER_REJECT;
|
|
reason = DCERPC_BIND_REASON_ASYNTAX;
|
|
}
|
|
|
|
/* setup a alter_resp */
|
|
dcesrv_init_hdr(&pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx));
|
|
pkt.auth_length = 0;
|
|
pkt.call_id = call->pkt.call_id;
|
|
pkt.ptype = DCERPC_PKT_ALTER_RESP;
|
|
pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
|
|
pkt.u.alter_resp.max_xmit_frag = 0x2000;
|
|
pkt.u.alter_resp.max_recv_frag = 0x2000;
|
|
if (result == 0) {
|
|
pkt.u.alter_resp.assoc_group_id = call->context->assoc_group->id;
|
|
} else {
|
|
pkt.u.alter_resp.assoc_group_id = 0;
|
|
}
|
|
pkt.u.alter_resp.num_results = 1;
|
|
pkt.u.alter_resp.ctx_list = talloc_array(call, struct dcerpc_ack_ctx, 1);
|
|
if (!pkt.u.alter_resp.ctx_list) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
pkt.u.alter_resp.ctx_list[0].result = result;
|
|
pkt.u.alter_resp.ctx_list[0].reason = reason;
|
|
pkt.u.alter_resp.ctx_list[0].syntax = ndr_transfer_syntax;
|
|
pkt.u.alter_resp.auth_info = data_blob(NULL, 0);
|
|
pkt.u.alter_resp.secondary_address = "";
|
|
|
|
status = dcesrv_auth_alter_ack(call, &pkt);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)
|
|
|| NT_STATUS_EQUAL(status, NT_STATUS_LOGON_FAILURE)
|
|
|| NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)
|
|
|| NT_STATUS_EQUAL(status, NT_STATUS_WRONG_PASSWORD)) {
|
|
return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
|
|
}
|
|
return dcesrv_fault(call, 0);
|
|
}
|
|
|
|
rep = talloc(call, struct data_blob_list_item);
|
|
if (!rep) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
status = ncacn_push_auth(&rep->blob, call, &pkt, call->conn->auth_state.auth_info);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
dcerpc_set_frag_length(&rep->blob, rep->blob.length);
|
|
|
|
DLIST_ADD_END(call->replies, rep, struct data_blob_list_item *);
|
|
dcesrv_call_set_list(call, DCESRV_LIST_CALL_LIST);
|
|
|
|
if (call->conn->call_list && call->conn->call_list->replies) {
|
|
if (call->conn->transport.report_output_data) {
|
|
call->conn->transport.report_output_data(call->conn);
|
|
}
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/*
|
|
possibly save the call for inspection with ndrdump
|
|
*/
|
|
static void dcesrv_save_call(struct dcesrv_call_state *call, const char *why)
|
|
{
|
|
#ifdef DEVELOPER
|
|
char *fname;
|
|
const char *dump_dir;
|
|
dump_dir = lpcfg_parm_string(call->conn->dce_ctx->lp_ctx, NULL, "dcesrv", "stubs directory");
|
|
if (!dump_dir) {
|
|
return;
|
|
}
|
|
fname = talloc_asprintf(call, "%s/RPC-%s-%u-%s.dat",
|
|
dump_dir,
|
|
call->context->iface->name,
|
|
call->pkt.u.request.opnum,
|
|
why);
|
|
if (file_save(fname, call->pkt.u.request.stub_and_verifier.data, call->pkt.u.request.stub_and_verifier.length)) {
|
|
DEBUG(0,("RPC SAVED %s\n", fname));
|
|
}
|
|
talloc_free(fname);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
handle a dcerpc request packet
|
|
*/
|
|
static NTSTATUS dcesrv_request(struct dcesrv_call_state *call)
|
|
{
|
|
struct ndr_pull *pull;
|
|
NTSTATUS status;
|
|
struct dcesrv_connection_context *context;
|
|
|
|
/* if authenticated, and the mech we use can't do async replies, don't use them... */
|
|
if (call->conn->auth_state.gensec_security &&
|
|
!gensec_have_feature(call->conn->auth_state.gensec_security, GENSEC_FEATURE_ASYNC_REPLIES)) {
|
|
call->state_flags &= ~DCESRV_CALL_STATE_FLAG_MAY_ASYNC;
|
|
}
|
|
|
|
context = dcesrv_find_context(call->conn, call->pkt.u.request.context_id);
|
|
if (context == NULL) {
|
|
return dcesrv_fault(call, DCERPC_FAULT_UNK_IF);
|
|
}
|
|
|
|
pull = ndr_pull_init_blob(&call->pkt.u.request.stub_and_verifier, call);
|
|
NT_STATUS_HAVE_NO_MEMORY(pull);
|
|
|
|
pull->flags |= LIBNDR_FLAG_REF_ALLOC;
|
|
|
|
call->context = context;
|
|
call->ndr_pull = pull;
|
|
|
|
if (!(call->pkt.drep[0] & DCERPC_DREP_LE)) {
|
|
pull->flags |= LIBNDR_FLAG_BIGENDIAN;
|
|
}
|
|
|
|
/* unravel the NDR for the packet */
|
|
status = context->iface->ndr_pull(call, call, pull, &call->r);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
if (call->fault_code == DCERPC_FAULT_OP_RNG_ERROR) {
|
|
/* we got an unknown call */
|
|
DEBUG(3,(__location__ ": Unknown RPC call %u on %s\n",
|
|
call->pkt.u.request.opnum, context->iface->name));
|
|
dcesrv_save_call(call, "unknown");
|
|
} else {
|
|
dcesrv_save_call(call, "pullfail");
|
|
}
|
|
return dcesrv_fault(call, call->fault_code);
|
|
}
|
|
|
|
if (pull->offset != pull->data_size) {
|
|
dcesrv_save_call(call, "extrabytes");
|
|
DEBUG(3,("Warning: %d extra bytes in incoming RPC request\n",
|
|
pull->data_size - pull->offset));
|
|
}
|
|
|
|
/* call the dispatch function */
|
|
status = context->iface->dispatch(call, call, call->r);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(5,("dcerpc fault in call %s:%02x - %s\n",
|
|
context->iface->name,
|
|
call->pkt.u.request.opnum,
|
|
dcerpc_errstr(pull, call->fault_code)));
|
|
return dcesrv_fault(call, call->fault_code);
|
|
}
|
|
|
|
/* add the call to the pending list */
|
|
dcesrv_call_set_list(call, DCESRV_LIST_PENDING_CALL_LIST);
|
|
|
|
if (call->state_flags & DCESRV_CALL_STATE_FLAG_ASYNC) {
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
return dcesrv_reply(call);
|
|
}
|
|
|
|
|
|
/*
|
|
remove the call from the right list when freed
|
|
*/
|
|
static int dcesrv_call_dequeue(struct dcesrv_call_state *call)
|
|
{
|
|
dcesrv_call_set_list(call, DCESRV_LIST_NONE);
|
|
return 0;
|
|
}
|
|
|
|
_PUBLIC_ const struct tsocket_address *dcesrv_connection_get_local_address(struct dcesrv_connection *conn)
|
|
{
|
|
return conn->local_address;
|
|
}
|
|
|
|
_PUBLIC_ const struct tsocket_address *dcesrv_connection_get_remote_address(struct dcesrv_connection *conn)
|
|
{
|
|
return conn->remote_address;
|
|
}
|
|
|
|
/*
|
|
process some input to a dcerpc endpoint server.
|
|
*/
|
|
NTSTATUS dcesrv_process_ncacn_packet(struct dcesrv_connection *dce_conn,
|
|
struct ncacn_packet *pkt,
|
|
DATA_BLOB blob)
|
|
{
|
|
NTSTATUS status;
|
|
struct dcesrv_call_state *call;
|
|
|
|
call = talloc_zero(dce_conn, struct dcesrv_call_state);
|
|
if (!call) {
|
|
data_blob_free(&blob);
|
|
talloc_free(pkt);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
call->conn = dce_conn;
|
|
call->event_ctx = dce_conn->event_ctx;
|
|
call->msg_ctx = dce_conn->msg_ctx;
|
|
call->state_flags = call->conn->state_flags;
|
|
call->time = timeval_current();
|
|
call->list = DCESRV_LIST_NONE;
|
|
|
|
talloc_steal(call, pkt);
|
|
talloc_steal(call, blob.data);
|
|
call->pkt = *pkt;
|
|
|
|
talloc_set_destructor(call, dcesrv_call_dequeue);
|
|
|
|
/* we have to check the signing here, before combining the
|
|
pdus */
|
|
if (call->pkt.ptype == DCERPC_PKT_REQUEST &&
|
|
!dcesrv_auth_request(call, &blob)) {
|
|
return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
|
|
}
|
|
|
|
/* see if this is a continued packet */
|
|
if (call->pkt.ptype == DCERPC_PKT_REQUEST &&
|
|
!(call->pkt.pfc_flags & DCERPC_PFC_FLAG_FIRST)) {
|
|
struct dcesrv_call_state *call2 = call;
|
|
uint32_t alloc_size;
|
|
|
|
/* we only allow fragmented requests, no other packet types */
|
|
if (call->pkt.ptype != DCERPC_PKT_REQUEST) {
|
|
return dcesrv_fault(call2, DCERPC_FAULT_OTHER);
|
|
}
|
|
|
|
/* this is a continuation of an existing call - find the call
|
|
then tack it on the end */
|
|
call = dcesrv_find_fragmented_call(dce_conn, call2->pkt.call_id);
|
|
if (!call) {
|
|
return dcesrv_fault(call2, DCERPC_FAULT_OTHER);
|
|
}
|
|
|
|
if (call->pkt.ptype != call2->pkt.ptype) {
|
|
/* trying to play silly buggers are we? */
|
|
return dcesrv_fault(call2, DCERPC_FAULT_OTHER);
|
|
}
|
|
|
|
alloc_size = call->pkt.u.request.stub_and_verifier.length +
|
|
call2->pkt.u.request.stub_and_verifier.length;
|
|
if (call->pkt.u.request.alloc_hint > alloc_size) {
|
|
alloc_size = call->pkt.u.request.alloc_hint;
|
|
}
|
|
|
|
call->pkt.u.request.stub_and_verifier.data =
|
|
talloc_realloc(call,
|
|
call->pkt.u.request.stub_and_verifier.data,
|
|
uint8_t, alloc_size);
|
|
if (!call->pkt.u.request.stub_and_verifier.data) {
|
|
return dcesrv_fault(call2, DCERPC_FAULT_OTHER);
|
|
}
|
|
memcpy(call->pkt.u.request.stub_and_verifier.data +
|
|
call->pkt.u.request.stub_and_verifier.length,
|
|
call2->pkt.u.request.stub_and_verifier.data,
|
|
call2->pkt.u.request.stub_and_verifier.length);
|
|
call->pkt.u.request.stub_and_verifier.length +=
|
|
call2->pkt.u.request.stub_and_verifier.length;
|
|
|
|
call->pkt.pfc_flags |= (call2->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST);
|
|
|
|
talloc_free(call2);
|
|
}
|
|
|
|
/* this may not be the last pdu in the chain - if its isn't then
|
|
just put it on the incoming_fragmented_call_list and wait for the rest */
|
|
if (call->pkt.ptype == DCERPC_PKT_REQUEST &&
|
|
!(call->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST)) {
|
|
dcesrv_call_set_list(call, DCESRV_LIST_FRAGMENTED_CALL_LIST);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/* This removes any fragments we may have had stashed away */
|
|
dcesrv_call_set_list(call, DCESRV_LIST_NONE);
|
|
|
|
switch (call->pkt.ptype) {
|
|
case DCERPC_PKT_BIND:
|
|
status = dcesrv_bind(call);
|
|
break;
|
|
case DCERPC_PKT_AUTH3:
|
|
status = dcesrv_auth3(call);
|
|
break;
|
|
case DCERPC_PKT_ALTER:
|
|
status = dcesrv_alter(call);
|
|
break;
|
|
case DCERPC_PKT_REQUEST:
|
|
status = dcesrv_request(call);
|
|
break;
|
|
default:
|
|
status = NT_STATUS_INVALID_PARAMETER;
|
|
break;
|
|
}
|
|
|
|
/* if we are going to be sending a reply then add
|
|
it to the list of pending calls. We add it to the end to keep the call
|
|
list in the order we will answer */
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
talloc_free(call);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
_PUBLIC_ NTSTATUS dcesrv_init_context(TALLOC_CTX *mem_ctx,
|
|
struct loadparm_context *lp_ctx,
|
|
const char **endpoint_servers, struct dcesrv_context **_dce_ctx)
|
|
{
|
|
NTSTATUS status;
|
|
struct dcesrv_context *dce_ctx;
|
|
int i;
|
|
|
|
if (!endpoint_servers) {
|
|
DEBUG(0,("dcesrv_init_context: no endpoint servers configured\n"));
|
|
return NT_STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
dce_ctx = talloc(mem_ctx, struct dcesrv_context);
|
|
NT_STATUS_HAVE_NO_MEMORY(dce_ctx);
|
|
dce_ctx->endpoint_list = NULL;
|
|
dce_ctx->lp_ctx = lp_ctx;
|
|
dce_ctx->assoc_groups_idr = idr_init(dce_ctx);
|
|
NT_STATUS_HAVE_NO_MEMORY(dce_ctx->assoc_groups_idr);
|
|
|
|
for (i=0;endpoint_servers[i];i++) {
|
|
const struct dcesrv_endpoint_server *ep_server;
|
|
|
|
ep_server = dcesrv_ep_server_byname(endpoint_servers[i]);
|
|
if (!ep_server) {
|
|
DEBUG(0,("dcesrv_init_context: failed to find endpoint server = '%s'\n", endpoint_servers[i]));
|
|
return NT_STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
status = ep_server->init_server(dce_ctx, ep_server);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0,("dcesrv_init_context: failed to init endpoint server = '%s': %s\n", endpoint_servers[i],
|
|
nt_errstr(status)));
|
|
return status;
|
|
}
|
|
}
|
|
|
|
*_dce_ctx = dce_ctx;
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/* the list of currently registered DCERPC endpoint servers.
|
|
*/
|
|
static struct ep_server {
|
|
struct dcesrv_endpoint_server *ep_server;
|
|
} *ep_servers = NULL;
|
|
static int num_ep_servers;
|
|
|
|
/*
|
|
register a DCERPC endpoint server.
|
|
|
|
The 'name' can be later used by other backends to find the operations
|
|
structure for this backend.
|
|
|
|
The 'type' is used to specify whether this is for a disk, printer or IPC$ share
|
|
*/
|
|
_PUBLIC_ NTSTATUS dcerpc_register_ep_server(const void *_ep_server)
|
|
{
|
|
const struct dcesrv_endpoint_server *ep_server = _ep_server;
|
|
|
|
if (dcesrv_ep_server_byname(ep_server->name) != NULL) {
|
|
/* its already registered! */
|
|
DEBUG(0,("DCERPC endpoint server '%s' already registered\n",
|
|
ep_server->name));
|
|
return NT_STATUS_OBJECT_NAME_COLLISION;
|
|
}
|
|
|
|
ep_servers = realloc_p(ep_servers, struct ep_server, num_ep_servers+1);
|
|
if (!ep_servers) {
|
|
smb_panic("out of memory in dcerpc_register");
|
|
}
|
|
|
|
ep_servers[num_ep_servers].ep_server = smb_xmemdup(ep_server, sizeof(*ep_server));
|
|
ep_servers[num_ep_servers].ep_server->name = smb_xstrdup(ep_server->name);
|
|
|
|
num_ep_servers++;
|
|
|
|
DEBUG(3,("DCERPC endpoint server '%s' registered\n",
|
|
ep_server->name));
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/*
|
|
return the operations structure for a named backend of the specified type
|
|
*/
|
|
const struct dcesrv_endpoint_server *dcesrv_ep_server_byname(const char *name)
|
|
{
|
|
int i;
|
|
|
|
for (i=0;i<num_ep_servers;i++) {
|
|
if (strcmp(ep_servers[i].ep_server->name, name) == 0) {
|
|
return ep_servers[i].ep_server;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void dcerpc_server_init(struct loadparm_context *lp_ctx)
|
|
{
|
|
static bool initialized;
|
|
#define _MODULE_PROTO(init) extern NTSTATUS init(void);
|
|
STATIC_dcerpc_server_MODULES_PROTO;
|
|
init_module_fn static_init[] = { STATIC_dcerpc_server_MODULES };
|
|
init_module_fn *shared_init;
|
|
|
|
if (initialized) {
|
|
return;
|
|
}
|
|
initialized = true;
|
|
|
|
shared_init = load_samba_modules(NULL, lp_ctx, "dcerpc_server");
|
|
|
|
run_init_functions(static_init);
|
|
run_init_functions(shared_init);
|
|
|
|
talloc_free(shared_init);
|
|
}
|
|
|
|
/*
|
|
return the DCERPC module version, and the size of some critical types
|
|
This can be used by endpoint server modules to either detect compilation errors, or provide
|
|
multiple implementations for different smbd compilation options in one module
|
|
*/
|
|
const struct dcesrv_critical_sizes *dcerpc_module_version(void)
|
|
{
|
|
static const struct dcesrv_critical_sizes critical_sizes = {
|
|
DCERPC_MODULE_VERSION,
|
|
sizeof(struct dcesrv_context),
|
|
sizeof(struct dcesrv_endpoint),
|
|
sizeof(struct dcesrv_endpoint_server),
|
|
sizeof(struct dcesrv_interface),
|
|
sizeof(struct dcesrv_if_list),
|
|
sizeof(struct dcesrv_connection),
|
|
sizeof(struct dcesrv_call_state),
|
|
sizeof(struct dcesrv_auth),
|
|
sizeof(struct dcesrv_handle)
|
|
};
|
|
|
|
return &critical_sizes;
|
|
}
|
|
|
|
static void dcesrv_terminate_connection(struct dcesrv_connection *dce_conn, const char *reason)
|
|
{
|
|
struct stream_connection *srv_conn;
|
|
srv_conn = talloc_get_type(dce_conn->transport.private_data,
|
|
struct stream_connection);
|
|
|
|
stream_terminate_connection(srv_conn, reason);
|
|
}
|
|
/* We need this include to be able to compile on some plateforms
|
|
* (ie. freebsd 7.2) as it seems that <sys/uio.h> is not included
|
|
* correctly.
|
|
* It has to be that deep because otherwise we have a conflict on
|
|
* const struct dcesrv_interface declaration.
|
|
* This is mostly due to socket_wrapper defining #define bind swrap_bind
|
|
* which conflict with the bind used before.
|
|
*/
|
|
#include "system/network.h"
|
|
|
|
struct dcesrv_sock_reply_state {
|
|
struct dcesrv_connection *dce_conn;
|
|
struct dcesrv_call_state *call;
|
|
struct iovec iov;
|
|
};
|
|
|
|
static void dcesrv_sock_reply_done(struct tevent_req *subreq);
|
|
|
|
static void dcesrv_sock_report_output_data(struct dcesrv_connection *dce_conn)
|
|
{
|
|
struct dcesrv_call_state *call;
|
|
|
|
call = dce_conn->call_list;
|
|
if (!call || !call->replies) {
|
|
return;
|
|
}
|
|
|
|
while (call->replies) {
|
|
struct data_blob_list_item *rep = call->replies;
|
|
struct dcesrv_sock_reply_state *substate;
|
|
struct tevent_req *subreq;
|
|
|
|
substate = talloc(call, struct dcesrv_sock_reply_state);
|
|
if (!substate) {
|
|
dcesrv_terminate_connection(dce_conn, "no memory");
|
|
return;
|
|
}
|
|
|
|
substate->dce_conn = dce_conn;
|
|
substate->call = NULL;
|
|
|
|
DLIST_REMOVE(call->replies, rep);
|
|
|
|
if (call->replies == NULL) {
|
|
substate->call = call;
|
|
}
|
|
|
|
substate->iov.iov_base = (void *) rep->blob.data;
|
|
substate->iov.iov_len = rep->blob.length;
|
|
|
|
subreq = tstream_writev_queue_send(substate,
|
|
dce_conn->event_ctx,
|
|
dce_conn->stream,
|
|
dce_conn->send_queue,
|
|
&substate->iov, 1);
|
|
if (!subreq) {
|
|
dcesrv_terminate_connection(dce_conn, "no memory");
|
|
return;
|
|
}
|
|
tevent_req_set_callback(subreq, dcesrv_sock_reply_done,
|
|
substate);
|
|
}
|
|
|
|
DLIST_REMOVE(call->conn->call_list, call);
|
|
call->list = DCESRV_LIST_NONE;
|
|
}
|
|
|
|
static void dcesrv_sock_reply_done(struct tevent_req *subreq)
|
|
{
|
|
struct dcesrv_sock_reply_state *substate = tevent_req_callback_data(subreq,
|
|
struct dcesrv_sock_reply_state);
|
|
int ret;
|
|
int sys_errno;
|
|
NTSTATUS status;
|
|
struct dcesrv_call_state *call = substate->call;
|
|
|
|
ret = tstream_writev_queue_recv(subreq, &sys_errno);
|
|
TALLOC_FREE(subreq);
|
|
if (ret == -1) {
|
|
status = map_nt_error_from_unix(sys_errno);
|
|
dcesrv_terminate_connection(substate->dce_conn, nt_errstr(status));
|
|
return;
|
|
}
|
|
|
|
talloc_free(substate);
|
|
if (call) {
|
|
talloc_free(call);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
struct dcesrv_socket_context {
|
|
const struct dcesrv_endpoint *endpoint;
|
|
struct dcesrv_context *dcesrv_ctx;
|
|
};
|
|
|
|
|
|
static void dcesrv_read_fragment_done(struct tevent_req *subreq);
|
|
|
|
static void dcesrv_sock_accept(struct stream_connection *srv_conn)
|
|
{
|
|
NTSTATUS status;
|
|
struct dcesrv_socket_context *dcesrv_sock =
|
|
talloc_get_type(srv_conn->private_data, struct dcesrv_socket_context);
|
|
struct dcesrv_connection *dcesrv_conn = NULL;
|
|
int ret;
|
|
struct tevent_req *subreq;
|
|
struct loadparm_context *lp_ctx = dcesrv_sock->dcesrv_ctx->lp_ctx;
|
|
|
|
if (!srv_conn->session_info) {
|
|
status = auth_anonymous_session_info(srv_conn,
|
|
lp_ctx,
|
|
&srv_conn->session_info);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0,("dcesrv_sock_accept: auth_anonymous_session_info failed: %s\n",
|
|
nt_errstr(status)));
|
|
stream_terminate_connection(srv_conn, nt_errstr(status));
|
|
return;
|
|
}
|
|
}
|
|
|
|
status = dcesrv_endpoint_connect(dcesrv_sock->dcesrv_ctx,
|
|
srv_conn,
|
|
dcesrv_sock->endpoint,
|
|
srv_conn->session_info,
|
|
srv_conn->event.ctx,
|
|
srv_conn->msg_ctx,
|
|
srv_conn->server_id,
|
|
DCESRV_CALL_STATE_FLAG_MAY_ASYNC,
|
|
&dcesrv_conn);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0,("dcesrv_sock_accept: dcesrv_endpoint_connect failed: %s\n",
|
|
nt_errstr(status)));
|
|
stream_terminate_connection(srv_conn, nt_errstr(status));
|
|
return;
|
|
}
|
|
|
|
dcesrv_conn->transport.private_data = srv_conn;
|
|
dcesrv_conn->transport.report_output_data = dcesrv_sock_report_output_data;
|
|
|
|
TALLOC_FREE(srv_conn->event.fde);
|
|
|
|
dcesrv_conn->send_queue = tevent_queue_create(dcesrv_conn, "dcesrv send queue");
|
|
if (!dcesrv_conn->send_queue) {
|
|
status = NT_STATUS_NO_MEMORY;
|
|
DEBUG(0,("dcesrv_sock_accept: tevent_queue_create(%s)\n",
|
|
nt_errstr(status)));
|
|
stream_terminate_connection(srv_conn, nt_errstr(status));
|
|
return;
|
|
}
|
|
|
|
if (dcesrv_sock->endpoint->ep_description->transport == NCACN_NP) {
|
|
dcesrv_conn->auth_state.session_key = dcesrv_inherited_session_key;
|
|
dcesrv_conn->stream = talloc_move(dcesrv_conn,
|
|
&srv_conn->tstream);
|
|
} else {
|
|
ret = tstream_bsd_existing_socket(dcesrv_conn,
|
|
socket_get_fd(srv_conn->socket),
|
|
&dcesrv_conn->stream);
|
|
if (ret == -1) {
|
|
status = map_nt_error_from_unix(errno);
|
|
DEBUG(0, ("dcesrv_sock_accept: "
|
|
"failed to setup tstream: %s\n",
|
|
nt_errstr(status)));
|
|
stream_terminate_connection(srv_conn, nt_errstr(status));
|
|
return;
|
|
}
|
|
socket_set_flags(srv_conn->socket, SOCKET_FLAG_NOCLOSE);
|
|
}
|
|
|
|
dcesrv_conn->local_address = srv_conn->local_address;
|
|
dcesrv_conn->remote_address = srv_conn->remote_address;
|
|
|
|
srv_conn->private_data = dcesrv_conn;
|
|
|
|
irpc_add_name(srv_conn->msg_ctx, "rpc_server");
|
|
|
|
subreq = dcerpc_read_ncacn_packet_send(dcesrv_conn,
|
|
dcesrv_conn->event_ctx,
|
|
dcesrv_conn->stream);
|
|
if (!subreq) {
|
|
status = NT_STATUS_NO_MEMORY;
|
|
DEBUG(0,("dcesrv_sock_accept: dcerpc_read_fragment_buffer_send(%s)\n",
|
|
nt_errstr(status)));
|
|
stream_terminate_connection(srv_conn, nt_errstr(status));
|
|
return;
|
|
}
|
|
tevent_req_set_callback(subreq, dcesrv_read_fragment_done, dcesrv_conn);
|
|
|
|
return;
|
|
}
|
|
|
|
static void dcesrv_read_fragment_done(struct tevent_req *subreq)
|
|
{
|
|
struct dcesrv_connection *dce_conn = tevent_req_callback_data(subreq,
|
|
struct dcesrv_connection);
|
|
struct ncacn_packet *pkt;
|
|
DATA_BLOB buffer;
|
|
NTSTATUS status;
|
|
|
|
status = dcerpc_read_ncacn_packet_recv(subreq, dce_conn,
|
|
&pkt, &buffer);
|
|
TALLOC_FREE(subreq);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
dcesrv_terminate_connection(dce_conn, nt_errstr(status));
|
|
return;
|
|
}
|
|
|
|
status = dcesrv_process_ncacn_packet(dce_conn, pkt, buffer);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
dcesrv_terminate_connection(dce_conn, nt_errstr(status));
|
|
return;
|
|
}
|
|
|
|
subreq = dcerpc_read_ncacn_packet_send(dce_conn,
|
|
dce_conn->event_ctx,
|
|
dce_conn->stream);
|
|
if (!subreq) {
|
|
status = NT_STATUS_NO_MEMORY;
|
|
dcesrv_terminate_connection(dce_conn, nt_errstr(status));
|
|
return;
|
|
}
|
|
tevent_req_set_callback(subreq, dcesrv_read_fragment_done, dce_conn);
|
|
}
|
|
|
|
static void dcesrv_sock_recv(struct stream_connection *conn, uint16_t flags)
|
|
{
|
|
struct dcesrv_connection *dce_conn = talloc_get_type(conn->private_data,
|
|
struct dcesrv_connection);
|
|
dcesrv_terminate_connection(dce_conn, "dcesrv_sock_recv triggered");
|
|
}
|
|
|
|
static void dcesrv_sock_send(struct stream_connection *conn, uint16_t flags)
|
|
{
|
|
struct dcesrv_connection *dce_conn = talloc_get_type(conn->private_data,
|
|
struct dcesrv_connection);
|
|
dcesrv_terminate_connection(dce_conn, "dcesrv_sock_send triggered");
|
|
}
|
|
|
|
|
|
static const struct stream_server_ops dcesrv_stream_ops = {
|
|
.name = "rpc",
|
|
.accept_connection = dcesrv_sock_accept,
|
|
.recv_handler = dcesrv_sock_recv,
|
|
.send_handler = dcesrv_sock_send,
|
|
};
|
|
|
|
static NTSTATUS dcesrv_add_ep_unix(struct dcesrv_context *dce_ctx,
|
|
struct loadparm_context *lp_ctx,
|
|
struct dcesrv_endpoint *e,
|
|
struct tevent_context *event_ctx, const struct model_ops *model_ops)
|
|
{
|
|
struct dcesrv_socket_context *dcesrv_sock;
|
|
uint16_t port = 1;
|
|
NTSTATUS status;
|
|
|
|
dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
|
|
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
|
|
|
|
/* remember the endpoint of this socket */
|
|
dcesrv_sock->endpoint = e;
|
|
dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
|
|
|
|
status = stream_setup_socket(dcesrv_sock, event_ctx, lp_ctx,
|
|
model_ops, &dcesrv_stream_ops,
|
|
"unix", e->ep_description->endpoint, &port,
|
|
lpcfg_socket_options(lp_ctx),
|
|
dcesrv_sock);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0,("service_setup_stream_socket(path=%s) failed - %s\n",
|
|
e->ep_description->endpoint, nt_errstr(status)));
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static NTSTATUS dcesrv_add_ep_ncalrpc(struct dcesrv_context *dce_ctx,
|
|
struct loadparm_context *lp_ctx,
|
|
struct dcesrv_endpoint *e,
|
|
struct tevent_context *event_ctx, const struct model_ops *model_ops)
|
|
{
|
|
struct dcesrv_socket_context *dcesrv_sock;
|
|
uint16_t port = 1;
|
|
char *full_path;
|
|
NTSTATUS status;
|
|
|
|
if (!e->ep_description->endpoint) {
|
|
/* No identifier specified: use DEFAULT.
|
|
* DO NOT hardcode this value anywhere else. Rather, specify
|
|
* no endpoint and let the epmapper worry about it. */
|
|
e->ep_description->endpoint = talloc_strdup(dce_ctx, "DEFAULT");
|
|
}
|
|
|
|
full_path = talloc_asprintf(dce_ctx, "%s/%s", lpcfg_ncalrpc_dir(lp_ctx),
|
|
e->ep_description->endpoint);
|
|
|
|
dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
|
|
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
|
|
|
|
/* remember the endpoint of this socket */
|
|
dcesrv_sock->endpoint = e;
|
|
dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
|
|
|
|
status = stream_setup_socket(dcesrv_sock, event_ctx, lp_ctx,
|
|
model_ops, &dcesrv_stream_ops,
|
|
"unix", full_path, &port,
|
|
lpcfg_socket_options(lp_ctx),
|
|
dcesrv_sock);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0,("service_setup_stream_socket(identifier=%s,path=%s) failed - %s\n",
|
|
e->ep_description->endpoint, full_path, nt_errstr(status)));
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static NTSTATUS dcesrv_add_ep_np(struct dcesrv_context *dce_ctx,
|
|
struct loadparm_context *lp_ctx,
|
|
struct dcesrv_endpoint *e,
|
|
struct tevent_context *event_ctx, const struct model_ops *model_ops)
|
|
{
|
|
struct dcesrv_socket_context *dcesrv_sock;
|
|
NTSTATUS status;
|
|
|
|
if (e->ep_description->endpoint == NULL) {
|
|
DEBUG(0, ("Endpoint mandatory for named pipes\n"));
|
|
return NT_STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
|
|
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
|
|
|
|
/* remember the endpoint of this socket */
|
|
dcesrv_sock->endpoint = e;
|
|
dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
|
|
|
|
status = tstream_setup_named_pipe(dce_ctx, event_ctx, lp_ctx,
|
|
model_ops, &dcesrv_stream_ops,
|
|
e->ep_description->endpoint,
|
|
dcesrv_sock);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0,("stream_setup_named_pipe(pipe=%s) failed - %s\n",
|
|
e->ep_description->endpoint, nt_errstr(status)));
|
|
return status;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/*
|
|
add a socket address to the list of events, one event per dcerpc endpoint
|
|
*/
|
|
static NTSTATUS add_socket_rpc_tcp_iface(struct dcesrv_context *dce_ctx, struct dcesrv_endpoint *e,
|
|
struct tevent_context *event_ctx, const struct model_ops *model_ops,
|
|
const char *address)
|
|
{
|
|
struct dcesrv_socket_context *dcesrv_sock;
|
|
uint16_t port = 0;
|
|
NTSTATUS status;
|
|
|
|
if (e->ep_description->endpoint) {
|
|
port = atoi(e->ep_description->endpoint);
|
|
}
|
|
|
|
dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
|
|
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
|
|
|
|
/* remember the endpoint of this socket */
|
|
dcesrv_sock->endpoint = e;
|
|
dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
|
|
|
|
status = stream_setup_socket(dcesrv_sock, event_ctx, dce_ctx->lp_ctx,
|
|
model_ops, &dcesrv_stream_ops,
|
|
"ipv4", address, &port,
|
|
lpcfg_socket_options(dce_ctx->lp_ctx),
|
|
dcesrv_sock);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0,("service_setup_stream_socket(address=%s,port=%u) failed - %s\n",
|
|
address, port, nt_errstr(status)));
|
|
}
|
|
|
|
if (e->ep_description->endpoint == NULL) {
|
|
e->ep_description->endpoint = talloc_asprintf(dce_ctx, "%d", port);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
#include "lib/socket/netif.h" /* Included here to work around the fact that socket_wrapper redefines bind() */
|
|
|
|
static NTSTATUS dcesrv_add_ep_tcp(struct dcesrv_context *dce_ctx,
|
|
struct loadparm_context *lp_ctx,
|
|
struct dcesrv_endpoint *e,
|
|
struct tevent_context *event_ctx, const struct model_ops *model_ops)
|
|
{
|
|
NTSTATUS status;
|
|
|
|
/* Add TCP/IP sockets */
|
|
if (lpcfg_interfaces(lp_ctx) && lpcfg_bind_interfaces_only(lp_ctx)) {
|
|
int num_interfaces;
|
|
int i;
|
|
struct interface *ifaces;
|
|
|
|
load_interfaces(dce_ctx, lpcfg_interfaces(lp_ctx), &ifaces);
|
|
|
|
num_interfaces = iface_count(ifaces);
|
|
for(i = 0; i < num_interfaces; i++) {
|
|
const char *address = iface_n_ip(ifaces, i);
|
|
status = add_socket_rpc_tcp_iface(dce_ctx, e, event_ctx, model_ops, address);
|
|
NT_STATUS_NOT_OK_RETURN(status);
|
|
}
|
|
} else {
|
|
status = add_socket_rpc_tcp_iface(dce_ctx, e, event_ctx, model_ops,
|
|
lpcfg_socket_address(lp_ctx));
|
|
NT_STATUS_NOT_OK_RETURN(status);
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS dcesrv_add_ep(struct dcesrv_context *dce_ctx,
|
|
struct loadparm_context *lp_ctx,
|
|
struct dcesrv_endpoint *e,
|
|
struct tevent_context *event_ctx,
|
|
const struct model_ops *model_ops)
|
|
{
|
|
switch (e->ep_description->transport) {
|
|
case NCACN_UNIX_STREAM:
|
|
return dcesrv_add_ep_unix(dce_ctx, lp_ctx, e, event_ctx, model_ops);
|
|
|
|
case NCALRPC:
|
|
return dcesrv_add_ep_ncalrpc(dce_ctx, lp_ctx, e, event_ctx, model_ops);
|
|
|
|
case NCACN_IP_TCP:
|
|
return dcesrv_add_ep_tcp(dce_ctx, lp_ctx, e, event_ctx, model_ops);
|
|
|
|
case NCACN_NP:
|
|
return dcesrv_add_ep_np(dce_ctx, lp_ctx, e, event_ctx, model_ops);
|
|
|
|
default:
|
|
return NT_STATUS_NOT_SUPPORTED;
|
|
}
|
|
}
|