packet-smb-mailslot.c

   1 /* packet-smb-mailslot.c
   2  * Routines for SMB mailslot packet dissection
   3  * Copyright 2000, Jeffrey C. Foster <jfoste@woodward.com>
   4  *
   5  * $Id: packet-smb-mailslot.c,v 1.19 2001/11/03 00:58:49 guy Exp $
   6  *
   7  * Ethereal - Network traffic analyzer
   8  * By Gerald Combs <gerald@ethereal.com>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * Copied from packet-pop.c
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  26  */
  27
  28 #include "packet-smb-common.h"
  29 #include "packet-smb-mailslot.h"
  30 #include "packet-smb-browse.h"
  31 #include "packet-smb-logon.h"
  32 #include "packet-smb-pipe.h"
  33
  34 static int proto_smb_msp = -1;
  35 static int hf_opcode = -1;
  36 static int hf_priority = -1;
  37 static int hf_class = -1;
  38 static int hf_size = -1;
  39 static int hf_name = -1;
  40
  41 static int ett_smb_msp = -1;
  42
  43 static const value_string opcode_vals[] = {
  44         {1,     "Write Mail Slot"},
  45         {0,     NULL}
  46 };
  47
  48 static const value_string class_vals[] = {
  49         {1,     "Reliable"},
  50         {2,     "Unreliable & Broadcast"},
  51         {0,     NULL}
  52 };
  53
  54 /* decode the SMB mail slot protocol */
  55 gboolean
  56 dissect_mailslot_smb(tvbuff_t *setup_tvb, tvbuff_t *tvb, packet_info *pinfo,
  57                      proto_tree *parent_tree)
  58 {
  59         struct smb_info *smb_info = pinfo->private_data;
  60         proto_tree      *tree = 0;
  61         proto_item      *item;
  62         tvbuff_t        *next_tvb = NULL;
  63         guint16         opcode;
  64         int             offset = 0;
  65         int             len;
  66
  67         if (!proto_is_protocol_enabled(proto_smb_msp)) {
  68                 return FALSE;
  69         }
  70         pinfo->current_proto = "SMB Mailslot";
  71
  72         if (check_col(pinfo->fd, COL_PROTOCOL)) {
  73                 col_set_str(pinfo->fd, COL_PROTOCOL, "SMB Mailslot");
  74         }
  75
  76         if (smb_info->data_offset < 0) {
  77                 /* Interim reply */
  78                 col_set_str(pinfo->fd, COL_INFO, "Interim reply");
  79                 return TRUE;
  80         }
  81
  82         /* do the opcode field */
  83         opcode = tvb_get_letohs(setup_tvb, offset);
  84
  85         if (check_col(pinfo->fd, COL_INFO)) {
  86                   col_add_str(pinfo->fd, COL_INFO,
  87                       val_to_str(opcode, opcode_vals, "Unknown opcode:0x%04x"));
  88         }
  89
  90         if (parent_tree) {
  91                 item = proto_tree_add_item(parent_tree, proto_smb_msp, setup_tvb,
  92                         offset, tvb_length_remaining(setup_tvb, offset), FALSE);
  93                 tree = proto_item_add_subtree(item, ett_smb_msp);
  94
  95                 /* opcode */
  96                 proto_tree_add_uint(tree, hf_opcode, setup_tvb, offset, 2,
  97                     opcode);
  98                 offset += 2;
  99
 100                 /* priority */
 101                 proto_tree_add_item(tree, hf_priority, setup_tvb, offset, 2,
 102                     TRUE);
 103                 offset += 2;
 104
 105                 /* class */
 106                 proto_tree_add_item(tree, hf_class, setup_tvb, offset, 2, TRUE);
 107                 offset += 2;
 108
 109                 /* size */
 110                 proto_tree_add_item(tree, hf_size, setup_tvb, offset, 2, TRUE);
 111                 offset += 2;
 112
 113                 /* mailslot name */
 114                 len = tvb_strsize(setup_tvb, offset);
 115                 proto_tree_add_item(tree, hf_name, setup_tvb, offset, len,
 116                     TRUE);
 117                 offset += len;
 118         }
 119
 120         /* Quit if we don't have the transaction command name (mailslot path) */
 121         if (smb_info->trans_cmd == NULL) {
 122                 /* Dump it as data */
 123                 dissect_data(tvb, smb_info->data_offset, pinfo, parent_tree);
 124                 return TRUE;
 125         }
 126
 127         /* create new tvb for subdissector */
 128         next_tvb = tvb_new_subset(tvb, smb_info->data_offset, -1, -1);
 129
 130         /*** Decide what dissector to call based upon the command value ***/
 131         if (strcmp(smb_info->trans_cmd, "BROWSE") == 0) {
 132                 if (dissect_mailslot_browse(next_tvb, pinfo, parent_tree))
 133                         return TRUE;
 134         } else if (strcmp(smb_info->trans_cmd, "LANMAN") == 0) {
 135                 /* Decode a LANMAN browse */
 136                 if (dissect_mailslot_lanman(next_tvb, pinfo, parent_tree))
 137                         return TRUE;
 138         } else if ((strncmp(smb_info->trans_cmd, "NET", strlen("NET")) == 0) ||
 139                    (strcmp(smb_info->trans_cmd, "TEMP\\NETLOGON") == 0) ||
 140                    (strcmp(smb_info->trans_cmd, "MSSP") == 0)) {
 141 /* NOTE: use TEMP\\NETLOGON and MSSP because they seems very common,    */
 142 /* NOTE: may need a look up list to check for the mailslot names passed */
 143 /*              by the logon request packet */
 144                 if (dissect_smb_logon(next_tvb, pinfo, parent_tree))
 145                         return TRUE;
 146         }
 147         /* Dump it as data */
 148         dissect_data(next_tvb, 0, pinfo, parent_tree);
 149         return TRUE;
 150 }
 151
 152 void
 153 register_proto_smb_mailslot(void)
 154 {
 155         static hf_register_info hf[] = {
 156                 { &hf_opcode,
 157                         { "Opcode", "mailslot.opcode", FT_UINT16, BASE_DEC,
 158                         VALS(opcode_vals), 0, "MAILSLOT OpCode", HFILL }},
 159
 160                 { &hf_priority,
 161                         { "Priority", "mailslot.priority", FT_UINT16, BASE_DEC,
 162                         NULL, 0, "MAILSLOT Priority of transaction", HFILL }},
 163
 164                 { &hf_class,
 165                         { "Class", "mailslot.class", FT_UINT16, BASE_DEC,
 166                         VALS(class_vals), 0, "MAILSLOT Class of transaction", HFILL }},
 167
 168                 { &hf_size,
 169                         { "Size", "mailslot.size", FT_UINT16, BASE_DEC,
 170                         NULL, 0, "MAILSLOT Total size of mail data", HFILL }},
 171
 172                 { &hf_name,
 173                         { "Mailslot Name", "mailslot.name", FT_STRING, BASE_NONE,
 174                         NULL, 0, "MAILSLOT Name of mailslot", HFILL }},
 175
 176         };
 177
 178         static gint *ett[] = {
 179                 &ett_smb_msp
 180         };
 181
 182         proto_smb_msp = proto_register_protocol(
 183                 "SMB MailSlot Protocol", "SMB Mailslot", "mailslot");
 184
 185         proto_register_field_array(proto_smb_msp, hf, array_length(hf));
 186         proto_register_subtree_array(ett, array_length(ett));
 187 }