fs/cifs/rfc1002pdu.h

   1 /*
   2  *   fs/cifs/rfc1002pdu.h
   3  *
   4  *   Protocol Data Unit definitions for RFC 1001/1002 support
   5  *
   6  *   Copyright (c) International Business Machines  Corp., 2004
   7  *   Author(s): Steve French (sfrench@us.ibm.com)
   8  *
   9  *   This library is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU Lesser General Public License as published
  11  *   by the Free Software Foundation; either version 2.1 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This library is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  *   the GNU Lesser General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU Lesser General Public License
  20  *   along with this library; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23
  24 /* NB: unlike smb/cifs packets, the RFC1002 structures are big endian */
  25
  26         /* RFC 1002 session packet types */
  27 #define RFC1002_SESSION_MESSAGE 0x00
  28 #define RFC1002_SESSION_REQUEST  0x81
  29 #define RFC1002_POSITIVE_SESSION_RESPONSE 0x82
  30 #define RFC1002_NEGATIVE_SESSION_RESPONSE 0x83
  31 #define RFC1002_RETARGET_SESSION_RESPONSE 0x84
  32 #define RFC1002_SESSION_KEEP_ALIVE 0x85
  33
  34         /* RFC 1002 flags (only one defined */
  35 #define RFC1002_LENGTH_EXTEND 0x80 /* high order bit of length (ie +64K) */
  36
  37 struct rfc1002_session_packet {
  38         __u8    type;
  39         __u8    flags;
  40         __u16   length;
  41         union {
  42                 struct {
  43                         __u8 called_len;
  44                         __u8 called_name[32];
  45                         __u8 scope1; /* null */
  46                         __u8 calling_len;
  47                         __u8 calling_name[32];
  48                         __u8 scope2; /* null */
  49                 } __attribute__((packed)) session_req;
  50                 struct {
  51                         __u32 retarget_ip_addr;
  52                         __u16 port;
  53                 } __attribute__((packed)) retarget_resp;
  54                 __u8 neg_ses_resp_error_code;
  55                 /* POSITIVE_SESSION_RESPONSE packet does not include trailer.
  56                 SESSION_KEEP_ALIVE packet also does not include a trailer.
  57                 Trailer for the SESSION_MESSAGE packet is SMB/CIFS header */
  58         } __attribute__((packed)) trailer;
  59 } __attribute__((packed));
  60
  61 /* Negative Session Response error codes */
  62 #define RFC1002_NOT_LISTENING_CALLED  0x80 /* not listening on called name */
  63 #define RFC1002_NOT_LISTENING_CALLING 0x81 /* not listening on calling name */
  64 #define RFC1002_NOT_PRESENT           0x82 /* called name not present */
  65 #define RFC1002_INSUFFICIENT_RESOURCE 0x83
  66 #define RFC1002_UNSPECIFIED_ERROR     0x8F
  67
  68 /* RFC 1002 Datagram service packets are not defined here as they
  69 are not needed for the network filesystem client unless we plan on
  70 implementing broadcast resolution of the server ip address (from
  71 server netbios name). Currently server names are resolved only via DNS
  72 (tcp name) or ip address or an /etc/hosts equivalent mapping to ip address.*/
  73
  74 #define DEFAULT_CIFS_CALLED_NAME  "*SMBSERVER      "