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samba-mirror/source4/rpc_server/dcerpc_server.h
Stefan Metzmacher fe5b462a76 s4:rpc_server: implement bind time feature negotiation
For now we don't really support any negotiated features.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2016-10-26 11:20:14 +02:00

474 lines
14 KiB
C

/*
Unix SMB/CIFS implementation.
server side dcerpc defines
Copyright (C) Andrew Tridgell 2003-2005
Copyright (C) Stefan (metze) Metzmacher 2004-2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef SAMBA_DCERPC_SERVER_H
#define SAMBA_DCERPC_SERVER_H
#include "librpc/gen_ndr/server_id.h"
#include "librpc/rpc/dcerpc.h"
#include "librpc/ndr/libndr.h"
/* modules can use the following to determine if the interface has changed
* please increment the version number after each interface change
* with a comment and maybe update struct dcesrv_critical_sizes.
*/
/* version 1 - initial version - metze */
#define DCERPC_MODULE_VERSION 1
struct dcesrv_connection;
struct dcesrv_call_state;
struct dcesrv_auth;
struct dcesrv_connection_context;
struct dcesrv_interface {
const char *name;
struct ndr_syntax_id syntax_id;
/* this function is called when the client binds to this interface */
NTSTATUS (*bind)(struct dcesrv_call_state *, const struct dcesrv_interface *, uint32_t if_version);
/* this function is called when the client disconnects the endpoint */
void (*unbind)(struct dcesrv_connection_context *, const struct dcesrv_interface *);
/* the ndr_pull function for the chosen interface.
*/
NTSTATUS (*ndr_pull)(struct dcesrv_call_state *, TALLOC_CTX *, struct ndr_pull *, void **);
/* the dispatch function for the chosen interface.
*/
NTSTATUS (*dispatch)(struct dcesrv_call_state *, TALLOC_CTX *, void *);
/* the reply function for the chosen interface.
*/
NTSTATUS (*reply)(struct dcesrv_call_state *, TALLOC_CTX *, void *);
/* the ndr_push function for the chosen interface.
*/
NTSTATUS (*ndr_push)(struct dcesrv_call_state *, TALLOC_CTX *, struct ndr_push *, const void *);
/* for any private use by the interface code */
const void *private_data;
};
enum dcesrv_call_list {
DCESRV_LIST_NONE,
DCESRV_LIST_CALL_LIST,
DCESRV_LIST_FRAGMENTED_CALL_LIST,
DCESRV_LIST_PENDING_CALL_LIST
};
struct data_blob_list_item {
struct data_blob_list_item *prev,*next;
DATA_BLOB blob;
};
/* the state of an ongoing dcerpc call */
struct dcesrv_call_state {
struct dcesrv_call_state *next, *prev;
struct dcesrv_connection *conn;
struct dcesrv_connection_context *context;
struct ncacn_packet pkt;
/*
which list this request is in, if any
*/
enum dcesrv_call_list list;
/* the backend can mark the call
* with DCESRV_CALL_STATE_FLAG_ASYNC
* that will cause the frontend to not touch r->out
* and skip the reply
*
* this is only allowed to the backend when DCESRV_CALL_STATE_FLAG_MAY_ASYNC
* is alerady set by the frontend
*
* the backend then needs to call dcesrv_reply() when it's
* ready to send the reply
*/
#define DCESRV_CALL_STATE_FLAG_ASYNC (1<<0)
#define DCESRV_CALL_STATE_FLAG_MAY_ASYNC (1<<1)
#define DCESRV_CALL_STATE_FLAG_MULTIPLEXED (1<<3)
#define DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL (1<<4)
uint32_t state_flags;
/* the time the request arrived in the server */
struct timeval time;
/* the backend can use this event context for async replies */
struct tevent_context *event_ctx;
/* the message_context that will be used for async replies */
struct imessaging_context *msg_ctx;
/* this is the pointer to the allocated function struct */
void *r;
/*
* that's the ndr pull context used in dcesrv_request()
* needed by dcesrv_reply() to carry over information
* for full pointer support.
*/
struct ndr_pull *ndr_pull;
DATA_BLOB input;
struct data_blob_list_item *replies;
/* this is used by the boilerplate code to generate DCERPC faults */
uint32_t fault_code;
/* the reason why we terminate the connection after sending a response */
const char *terminate_reason;
/* temporary auth_info fields */
struct dcerpc_auth in_auth_info;
struct dcerpc_auth _out_auth_info;
struct dcerpc_auth *out_auth_info;
};
#define DCESRV_HANDLE_ANY 255
/* a dcerpc handle in internal format */
struct dcesrv_handle {
struct dcesrv_handle *next, *prev;
struct dcesrv_assoc_group *assoc_group;
struct policy_handle wire_handle;
struct dom_sid *sid;
const struct dcesrv_interface *iface;
void *data;
};
/* hold the authentication state information */
struct dcesrv_auth {
enum dcerpc_AuthType auth_type;
enum dcerpc_AuthLevel auth_level;
uint32_t auth_context_id;
struct gensec_security *gensec_security;
struct auth_session_info *session_info;
NTSTATUS (*session_key)(struct dcesrv_connection *, DATA_BLOB *session_key);
bool client_hdr_signing;
bool hdr_signing;
bool auth_finished;
bool auth_invalid;
};
struct dcesrv_connection_context {
struct dcesrv_connection_context *next, *prev;
uint16_t context_id;
/* the connection this is on */
struct dcesrv_connection *conn;
/* the ndr function table for the chosen interface */
const struct dcesrv_interface *iface;
/* private data for the interface implementation */
void *private_data;
/*
* the minimum required auth level for this interface
*/
enum dcerpc_AuthLevel min_auth_level;
bool allow_connect;
/* the negotiated transfer syntax */
struct ndr_syntax_id transfer_syntax;
};
/* the state associated with a dcerpc server connection */
struct dcesrv_connection {
/* for the broken_connections DLIST */
struct dcesrv_connection *prev, *next;
/* the top level context for this server */
struct dcesrv_context *dce_ctx;
/* the endpoint that was opened */
const struct dcesrv_endpoint *endpoint;
/* a list of established context_ids */
struct dcesrv_connection_context *contexts;
/* the state of the current incoming call fragments */
struct dcesrv_call_state *incoming_fragmented_call_list;
/* the state of the async pending calls */
struct dcesrv_call_state *pending_call_list;
/* the state of the current outgoing calls */
struct dcesrv_call_state *call_list;
/* the maximum size the client wants to receive */
uint16_t max_recv_frag;
uint16_t max_xmit_frag;
DATA_BLOB partial_input;
/* the event_context that will be used for this connection */
struct tevent_context *event_ctx;
/* the message_context that will be used for this connection */
struct imessaging_context *msg_ctx;
/* the server_id that will be used for this connection */
struct server_id server_id;
/* the transport level session key */
DATA_BLOB transport_session_key;
/* is this connection pending termination? If so, why? */
const char *terminate;
const char *packet_log_dir;
/* this is the default state_flags for dcesrv_call_state structs */
uint32_t state_flags;
struct {
void *private_data;
void (*report_output_data)(struct dcesrv_connection *);
} transport;
struct tstream_context *stream;
struct tevent_queue *send_queue;
const struct tsocket_address *local_address;
const struct tsocket_address *remote_address;
/* the current authentication state */
struct dcesrv_auth auth_state;
/*
* remember which pdu types are allowed
*/
bool allow_bind;
bool allow_auth3;
bool allow_alter;
bool allow_request;
/* the association group the connection belongs to */
struct dcesrv_assoc_group *assoc_group;
/* The maximum total payload of reassembled request pdus */
size_t max_total_request_size;
/*
* Our preferred transfer syntax.
*/
const struct ndr_syntax_id *preferred_transfer;
/* the negotiated bind time features */
uint16_t bind_time_features;
};
struct dcesrv_endpoint_server {
/* this is the name of the endpoint server */
const char *name;
/* this function should register endpoints and some other setup stuff,
* it is called when the dcesrv_context gets initialized.
*/
NTSTATUS (*init_server)(struct dcesrv_context *, const struct dcesrv_endpoint_server *);
/* this function can be used by other endpoint servers to
* ask for a dcesrv_interface implementation
* - iface must be reference to an already existing struct !
*/
bool (*interface_by_uuid)(struct dcesrv_interface *iface, const struct GUID *, uint32_t);
/* this function can be used by other endpoint servers to
* ask for a dcesrv_interface implementation
* - iface must be reference to an already existeng struct !
*/
bool (*interface_by_name)(struct dcesrv_interface *iface, const char *);
};
/* one association groups */
struct dcesrv_assoc_group {
/* the wire id */
uint32_t id;
/* list of handles in this association group */
struct dcesrv_handle *handles;
/* parent context */
struct dcesrv_context *dce_ctx;
/* Remote association group ID (if proxied) */
uint32_t proxied_id;
};
/* server-wide context information for the dcerpc server */
struct dcesrv_context {
/*
* The euid at startup time.
*
* This is required for DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM
*/
uid_t initial_euid;
/* the list of endpoints that have registered
* by the configured endpoint servers
*/
struct dcesrv_endpoint {
struct dcesrv_endpoint *next, *prev;
/* the type and location of the endpoint */
struct dcerpc_binding *ep_description;
/* the security descriptor for smb named pipes */
struct security_descriptor *sd;
/* the list of interfaces available on this endpoint */
struct dcesrv_if_list {
struct dcesrv_if_list *next, *prev;
struct dcesrv_interface iface;
} *interface_list;
} *endpoint_list;
/* loadparm context to use for this connection */
struct loadparm_context *lp_ctx;
struct idr_context *assoc_groups_idr;
struct dcesrv_connection *broken_connections;
};
/* this structure is used by modules to determine the size of some critical types */
struct dcesrv_critical_sizes {
int interface_version;
int sizeof_dcesrv_context;
int sizeof_dcesrv_endpoint;
int sizeof_dcesrv_endpoint_server;
int sizeof_dcesrv_interface;
int sizeof_dcesrv_if_list;
int sizeof_dcesrv_connection;
int sizeof_dcesrv_call_state;
int sizeof_dcesrv_auth;
int sizeof_dcesrv_handle;
};
struct model_ops;
NTSTATUS dcesrv_interface_register(struct dcesrv_context *dce_ctx,
const char *ep_name,
const struct dcesrv_interface *iface,
const struct security_descriptor *sd);
NTSTATUS dcerpc_register_ep_server(const void *_ep_server);
NTSTATUS dcesrv_init_context(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_ctx,
const char **endpoint_servers, struct dcesrv_context **_dce_ctx);
NTSTATUS dcesrv_endpoint_connect(struct dcesrv_context *dce_ctx,
TALLOC_CTX *mem_ctx,
const struct dcesrv_endpoint *ep,
struct auth_session_info *session_info,
struct tevent_context *event_ctx,
struct imessaging_context *msg_ctx,
struct server_id server_id,
uint32_t state_flags,
struct dcesrv_connection **_p);
NTSTATUS dcesrv_reply(struct dcesrv_call_state *call);
struct dcesrv_handle *dcesrv_handle_new(struct dcesrv_connection_context *context,
uint8_t handle_type);
struct dcesrv_handle *dcesrv_handle_fetch(
struct dcesrv_connection_context *context,
struct policy_handle *p,
uint8_t handle_type);
struct socket_address *dcesrv_connection_get_my_addr(struct dcesrv_connection *conn, TALLOC_CTX *mem_ctx);
struct socket_address *dcesrv_connection_get_peer_addr(struct dcesrv_connection *conn, TALLOC_CTX *mem_ctx);
const struct tsocket_address *dcesrv_connection_get_local_address(struct dcesrv_connection *conn);
const struct tsocket_address *dcesrv_connection_get_remote_address(struct dcesrv_connection *conn);
NTSTATUS dcesrv_fetch_session_key(struct dcesrv_connection *p, DATA_BLOB *session_key);
/* a useful macro for generating a RPC fault in the backend code */
#define DCESRV_FAULT(code) do { \
dce_call->fault_code = code; \
return r->out.result; \
} while(0)
/* a useful macro for generating a RPC fault in the backend code */
#define DCESRV_FAULT_VOID(code) do { \
dce_call->fault_code = code; \
return; \
} while(0)
/* a useful macro for checking the validity of a dcerpc policy handle
and giving the right fault code if invalid */
#define DCESRV_CHECK_HANDLE(h) do {if (!(h)) DCESRV_FAULT(DCERPC_FAULT_CONTEXT_MISMATCH); } while (0)
/* this checks for a valid policy handle, and gives a fault if an
invalid handle or retval if the handle is of the
wrong type */
#define DCESRV_PULL_HANDLE_RETVAL(h, inhandle, t, retval) do { \
(h) = dcesrv_handle_fetch(dce_call->context, (inhandle), DCESRV_HANDLE_ANY); \
DCESRV_CHECK_HANDLE(h); \
if ((t) != DCESRV_HANDLE_ANY && (h)->wire_handle.handle_type != (t)) { \
return retval; \
} \
} while (0)
/* this checks for a valid policy handle and gives a dcerpc fault
if its the wrong type of handle */
#define DCESRV_PULL_HANDLE_FAULT(h, inhandle, t) do { \
(h) = dcesrv_handle_fetch(dce_call->context, (inhandle), t); \
DCESRV_CHECK_HANDLE(h); \
} while (0)
#define DCESRV_PULL_HANDLE(h, inhandle, t) DCESRV_PULL_HANDLE_RETVAL(h, inhandle, t, NT_STATUS_INVALID_HANDLE)
#define DCESRV_PULL_HANDLE_WERR(h, inhandle, t) DCESRV_PULL_HANDLE_RETVAL(h, inhandle, t, WERR_INVALID_HANDLE)
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);
/**
* retrieve credentials from a dce_call
*/
_PUBLIC_ struct cli_credentials *dcesrv_call_credentials(struct dcesrv_call_state *dce_call);
/**
* returns true if this is an authenticated call
*/
_PUBLIC_ bool dcesrv_call_authenticated(struct dcesrv_call_state *dce_call);
/**
* retrieve account_name for a dce_call
*/
_PUBLIC_ const char *dcesrv_call_account_name(struct dcesrv_call_state *dce_call);
_PUBLIC_ NTSTATUS dcesrv_interface_bind_require_integrity(struct dcesrv_call_state *dce_call,
const struct dcesrv_interface *iface);
_PUBLIC_ NTSTATUS dcesrv_interface_bind_require_privacy(struct dcesrv_call_state *dce_call,
const struct dcesrv_interface *iface);
_PUBLIC_ NTSTATUS dcesrv_interface_bind_reject_connect(struct dcesrv_call_state *dce_call,
const struct dcesrv_interface *iface);
_PUBLIC_ NTSTATUS dcesrv_interface_bind_allow_connect(struct dcesrv_call_state *dce_call,
const struct dcesrv_interface *iface);
#endif /* SAMBA_DCERPC_SERVER_H */