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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/fs/cifs/rfc1002pdu.h
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/*

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 *   fs/cifs/rfc1002pdu.h

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 *

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 *   Protocol Data Unit definitions for RFC 1001/1002 support

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 *

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 *   Copyright (c) International Business Machines  Corp., 2004

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 *   Author(s): Steve French ([email protected])

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 *

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 *   This library is free software; you can redistribute it and/or modify

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 *   it under the terms of the GNU Lesser General Public License as published

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 *   by the Free Software Foundation; either version 2.1 of the License, or

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 *   (at your option) any later version.

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 *

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 *   This library 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

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 *   the GNU Lesser General Public License for more details.

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 *

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 *   You should have received a copy of the GNU Lesser General Public License

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 *   along with this library; if not, write to the Free Software

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 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

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 */

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/* NB: unlike smb/cifs packets, the RFC1002 structures are big endian */

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	/* RFC 1002 session packet types */

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#define RFC1002_SESSION_MESSAGE 0x00

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#define RFC1002_SESSION_REQUEST  0x81

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#define RFC1002_POSITIVE_SESSION_RESPONSE 0x82

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#define RFC1002_NEGATIVE_SESSION_RESPONSE 0x83

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#define RFC1002_RETARGET_SESSION_RESPONSE 0x84

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#define RFC1002_SESSION_KEEP_ALIVE 0x85

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	/* RFC 1002 flags (only one defined */

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#define RFC1002_LENGTH_EXTEND 0x80 /* high order bit of length (ie +64K) */

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struct rfc1002_session_packet {

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	__u8	type;

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	__u8	flags;

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	__u16	length;

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	union {

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		struct {

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			__u8 called_len;

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			__u8 called_name[32];

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			__u8 scope1; /* null */

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			__u8 calling_len;

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			__u8 calling_name[32];

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			__u8 scope2; /* null */

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		} __attribute__((packed)) session_req;

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		struct {

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			__u32 retarget_ip_addr;

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			__u16 port;

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		} __attribute__((packed)) retarget_resp;

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		__u8 neg_ses_resp_error_code;

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		/* POSITIVE_SESSION_RESPONSE packet does not include trailer.

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		SESSION_KEEP_ALIVE packet also does not include a trailer.

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		Trailer for the SESSION_MESSAGE packet is SMB/CIFS header */

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	} __attribute__((packed)) trailer;

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} __attribute__((packed));

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/* Negative Session Response error codes */

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#define RFC1002_NOT_LISTENING_CALLED  0x80 /* not listening on called name */

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#define RFC1002_NOT_LISTENING_CALLING 0x81 /* not listening on calling name */

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#define RFC1002_NOT_PRESENT           0x82 /* called name not present */

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#define RFC1002_INSUFFICIENT_RESOURCE 0x83

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#define RFC1002_UNSPECIFIED_ERROR     0x8F

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/* RFC 1002 Datagram service packets are not defined here as they

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are not needed for the network filesystem client unless we plan on

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implementing broadcast resolution of the server ip address (from

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server netbios name). Currently server names are resolved only via DNS

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(tcp name) or ip address or an /etc/hosts equivalent mapping to ip address.*/

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#define DEFAULT_CIFS_CALLED_NAME  "*SMBSERVER      "

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