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+/*
+ Unix SMB/CIFS implementation.
+ SMB parameters and setup
+ Copyright (C) Andrew Tridgell 1992-1998
+ Copyright (C) Luke Kenneth Casson Leighton 1996-1998
+ Copyright (C) Jeremy Allison 1998
+ Copyright (C) James Myers 2003 <myersjj@samba.org>
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+struct smbcli_tree; /* forward declare */
+struct smbcli_request; /* forward declare */
+struct smbcli_session; /* forward declare */
+struct smbcli_transport; /* forward declare */
+
+/* context that will be and has been negotiated between the client and server */
+struct smbcli_negotiate {
+ /*
+ * negotiated maximum transmit size - this is given to us by the server
+ */
+ uint32_t max_xmit;
+
+ /* maximum number of requests that can be multiplexed */
+ uint16_t max_mux;
+
+ /* the negotiatiated protocol */
+ enum protocol_types protocol;
+
+ uint8_t sec_mode; /* security mode returned by negprot */
+ uint8_t key_len;
+ DATA_BLOB server_guid; /* server_guid */
+ DATA_BLOB secblob; /* cryptkey or negTokenInit blob */
+ uint32_t sesskey;
+
+ struct smb_signing_context sign_info;
+
+ /* capabilities that the server reported */
+ uint32_t capabilities;
+
+ int server_zone;
+ time_t server_time;
+ uint_t readbraw_supported:1;
+ uint_t writebraw_supported:1;
+
+ char *server_domain;
+};
+
+/* this is the context for a SMB socket associated with the socket itself */
+struct smbcli_socket {
+ struct in_addr dest_ip;
+ /* dest hostname (which may or may not be a DNS name) */
+ char *hostname;
+
+ /* the port used */
+ int port;
+
+ struct socket_context *sock;
+
+ /* a count of the number of packets we have received. We
+ * actually only care about zero/non-zero at this stage */
+ uint_t pkt_count;
+
+ /* the network address of the client */
+ char *client_addr;
+
+ /* timeout for socket operations in milliseconds. */
+ int timeout;
+};
+
+/*
+ this structure allows applications to control the behaviour of the
+ client library
+*/
+struct smbcli_options {
+ uint_t use_oplocks:1;
+ uint_t use_level2_oplocks:1;
+ uint_t use_spnego:1;
+ uint32_t max_xmit;
+ uint16_t max_mux;
+};
+
+/* this is the context for the client transport layer */
+struct smbcli_transport {
+ /* socket level info */
+ struct smbcli_socket *socket;
+
+ /* the next mid to be allocated - needed for signing and
+ request matching */
+ uint16_t next_mid;
+
+ /* negotiated protocol information */
+ struct smbcli_negotiate negotiate;
+
+ /* options to control the behaviour of the client code */
+ struct smbcli_options options;
+
+ /* is a readbraw pending? we need to handle that case
+ specially on receiving packets */
+ uint_t readbraw_pending:1;
+
+ /* an idle function - if this is defined then it will be
+ called once every period seconds while we are waiting
+ for a packet */
+ struct {
+ void (*func)(struct smbcli_transport *, void *);
+ void *private;
+ uint_t period;
+ } idle;
+
+ /* the error fields from the last message */
+ struct {
+ enum {ETYPE_NONE, ETYPE_DOS, ETYPE_NT, ETYPE_SOCKET, ETYPE_NBT} etype;
+ union {
+ struct {
+ uint8_t eclass;
+ uint16_t ecode;
+ } dos;
+ NTSTATUS nt_status;
+ enum {SOCKET_READ_TIMEOUT,
+ SOCKET_READ_EOF,
+ SOCKET_READ_ERROR,
+ SOCKET_WRITE_ERROR,
+ SOCKET_READ_BAD_SIG} socket_error;
+ uint_t nbt_error;
+ } e;
+ } error;
+
+ struct {
+ /* a oplock break request handler */
+ BOOL (*handler)(struct smbcli_transport *transport,
+ uint16_t tid, uint16_t fnum, uint8_t level, void *private);
+ /* private data passed to the oplock handler */
+ void *private;
+ } oplock;
+
+ /* a list of async requests that are pending for send on this connection */
+ struct smbcli_request *pending_send;
+
+ /* a list of async requests that are pending for receive on this connection */
+ struct smbcli_request *pending_recv;
+
+ /* remember the called name - some sub-protocols require us to
+ know the server name */
+ struct nmb_name called;
+
+ /* a buffer for partially received SMB packets. */
+ struct {
+ uint8_t header[NBT_HDR_SIZE];
+ size_t req_size;
+ size_t received;
+ uint8_t *buffer;
+ } recv_buffer;
+
+ /* the event handle for waiting for socket IO */
+ struct {
+ struct event_context *ctx;
+ struct fd_event *fde;
+ struct timed_event *te;
+ } event;
+};
+
+/* this is the context for the user */
+
+/* this is the context for the session layer */
+struct smbcli_session {
+ /* transport layer info */
+ struct smbcli_transport *transport;
+
+ /* after a session setup the server provides us with
+ a vuid identifying the security context */
+ uint16_t vuid;
+
+ /* default pid for this session */
+ uint32_t pid;
+
+ /* the flags2 for each packet - this allows
+ the user to control these for torture testing */
+ uint16_t flags2;
+
+ DATA_BLOB user_session_key;
+
+ /* the spnego context if we use extented security */
+ struct gensec_security *gensec;
+};
+
+/*
+ smbcli_tree context: internal state for a tree connection.
+ */
+struct smbcli_tree {
+ /* session layer info */
+ struct smbcli_session *session;
+
+ uint16_t tid; /* tree id, aka cnum */
+ char *device;
+ char *fs_type;
+};
+
+
+/*
+ a client request moves between the following 4 states.
+*/
+enum smbcli_request_state {SMBCLI_REQUEST_INIT, /* we are creating the request */
+ SMBCLI_REQUEST_SEND, /* the request is in the outgoing socket Q */
+ SMBCLI_REQUEST_RECV, /* we are waiting for a matching reply */
+ SMBCLI_REQUEST_DONE, /* the request is finished */
+ SMBCLI_REQUEST_ERROR}; /* a packet or transport level error has occurred */
+
+/* the context for a single SMB request. This is passed to any request-context
+ * functions (similar to context.h, the server version).
+ * This will allow requests to be multi-threaded. */
+struct smbcli_request {
+ /* allow a request to be part of a list of requests */
+ struct smbcli_request *next, *prev;
+
+ /* each request is in one of 4 possible states */
+ enum smbcli_request_state state;
+
+ /* a request always has a transport context, nearly always has
+ a session context and usually has a tree context */
+ struct smbcli_transport *transport;
+ struct smbcli_session *session;
+ struct smbcli_tree *tree;
+
+ /* the flags2 from the SMB request, in raw form (host byte
+ order). Used to parse strings */
+ uint16_t flags2;
+
+ /* the NT status for this request. Set by packet receive code
+ or code detecting error. */
+ NTSTATUS status;
+
+ /* the sequence number of this packet - used for signing */
+ uint_t seq_num;
+
+ /* set if this is a one-way request, meaning we are not
+ expecting a reply from the server. */
+ uint_t one_way_request:1;
+
+ /* set this when the request should only increment the signing
+ counter by one */
+ uint_t sign_single_increment:1;
+
+ /* the mid of this packet - used to match replies */
+ uint16_t mid;
+
+ struct request_buffer in;
+ struct request_buffer out;
+
+ /* information on what to do with a reply when it is received
+ asyncronously. If this is not setup when a reply is received then
+ the reply is discarded
+
+ The private pointer is private to the caller of the client
+ library (the application), not private to the library
+ */
+ struct {
+ void (*fn)(struct smbcli_request *);
+ void *private;
+ } async;
+};
+
+/* useful way of catching wct errors with file and line number */
+#define SMBCLI_CHECK_MIN_WCT(req, wcount) if ((req)->in.wct < (wcount)) { \
+ DEBUG(1,("Unexpected WCT %d at %s(%d) - expected min %d\n", (req)->in.wct, __FILE__, __LINE__, wcount)); \
+ req->status = NT_STATUS_INVALID_PARAMETER; \
+ goto failed; \
+}
+
+#define SMBCLI_CHECK_WCT(req, wcount) if ((req)->in.wct != (wcount)) { \
+ DEBUG(1,("Unexpected WCT %d at %s(%d) - expected %d\n", (req)->in.wct, __FILE__, __LINE__, wcount)); \
+ req->status = NT_STATUS_INVALID_PARAMETER; \
+ goto failed; \
+}