packet-pcnfsd.c

   1 /* packet-pcnfsd.c
   2  * Routines for PCNFSD dissection
   3  *
   4  * $Id: packet-pcnfsd.c,v 1.3 2001/11/07 07:05:58 girlich Exp $
   5  *
   6  * Ethereal - Network traffic analyzer
   7  * By Gerald Combs <gerald@zing.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * Copied from packet-ypbind.c
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  25  */
  26
  27
  28 /*
  29 Protocol information comes from the book
  30         "NFS Illustrated" by Brent Callaghan, ISBN 0-201-32570-5
  31 */
  32
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include "config.h"
  36 #endif
  37
  38
  39 #ifdef HAVE_SYS_TYPES_H
  40 #include <sys/types.h>
  41 #endif
  42
  43
  44 #include "packet-rpc.h"
  45 #include "packet-pcnfsd.h"
  46
  47 static int proto_pcnfsd = -1;
  48
  49 static int hf_pcnfsd_auth_client = -1;
  50 static int hf_pcnfsd_auth_ident_obscure = -1;
  51 static int hf_pcnfsd_auth_ident_clear = -1;
  52 static int hf_pcnfsd_auth_password_obscure = -1;
  53 static int hf_pcnfsd_auth_password_clear = -1;
  54 static int hf_pcnfsd_comment = -1;
  55 static int hf_pcnfsd_status = -1;
  56 static int hf_pcnfsd_uid = -1;
  57 static int hf_pcnfsd_gid = -1;
  58 static int hf_pcnfsd_gids_count = -1;
  59 static int hf_pcnfsd_homedir = -1;
  60 static int hf_pcnfsd_def_umask = -1;
  61
  62
  63 static gint ett_pcnfsd = -1;
  64 static gint ett_pcnfsd_auth_ident = -1;
  65 static gint ett_pcnfsd_auth_password = -1;
  66 static gint ett_pcnfsd_gids = -1;
  67
  68 /* "NFS Illustrated 14.7.13 */
  69 void
  70 pcnfsd_decode_obscure(char* data, int len)
  71 {
  72         for ( ; len>0 ; len--, data++) {
  73                 *data = (*data ^ 0x5b) & 0x7f;
  74         }
  75 }
  76
  77
  78 /* "NFS Illustrated" 14.7.13 */
  79 int
  80 dissect_pcnfsd2_auth_call(tvbuff_t *tvb, int offset, packet_info *pinfo,
  81         proto_tree *tree)
  82 {
  83         int     newoffset;
  84         char    *ident = NULL;
  85         proto_item      *ident_item = NULL;
  86         proto_tree      *ident_tree = NULL;
  87         char    *password = NULL;
  88         proto_item      *password_item = NULL;
  89         proto_tree      *password_tree = NULL;
  90
  91         offset = dissect_rpc_string(tvb, pinfo, tree,
  92                 hf_pcnfsd_auth_client, offset, NULL);
  93
  94         if (tree) {
  95                 ident_item = proto_tree_add_text(tree, tvb,
  96                                 offset, tvb_length_remaining(tvb, offset),
  97                                 "Authentication Ident");
  98                 if (ident_item)
  99                         ident_tree = proto_item_add_subtree(
 100                                 ident_item, ett_pcnfsd_auth_ident);
 101         }
 102         newoffset = dissect_rpc_string(tvb, pinfo, ident_tree,
 103                 hf_pcnfsd_auth_ident_obscure, offset, &ident);
 104         if (ident_item) {
 105                 proto_item_set_len(ident_item, newoffset-offset);
 106         }
 107
 108         if (ident) {
 109                 pcnfsd_decode_obscure(ident, strlen(ident));
 110                 if (ident_tree)
 111                         proto_tree_add_string(ident_tree,
 112                                 hf_pcnfsd_auth_ident_clear,
 113                                 tvb, offset+4, strlen(ident), ident);
 114         }
 115         if (ident_item) {
 116                 proto_item_set_text(ident_item, "Authentication Ident: %s",
 117                         ident);
 118         }
 119         if (ident) {
 120                 g_free(ident);
 121                 ident = NULL;
 122         }
 123
 124         offset = newoffset;
 125
 126         if (tree) {
 127                 password_item = proto_tree_add_text(tree, tvb,
 128                                 offset, tvb_length_remaining(tvb, offset),
 129                                 "Authentication Password");
 130                 if (password_item)
 131                         password_tree = proto_item_add_subtree(
 132                                 password_item, ett_pcnfsd_auth_password);
 133         }
 134         newoffset = dissect_rpc_string(tvb, pinfo, password_tree,
 135                 hf_pcnfsd_auth_password_obscure, offset, &password);
 136         if (password_item) {
 137                 proto_item_set_len(password_item, newoffset-offset);
 138         }
 139
 140         if (password) {
 141                 pcnfsd_decode_obscure(password, strlen(password));
 142                 if (password_tree)
 143                         proto_tree_add_string(password_tree,
 144                                 hf_pcnfsd_auth_password_clear,
 145                                 tvb, offset+4, strlen(password), password);
 146         }
 147         if (password_item) {
 148                 proto_item_set_text(password_item, "Authentication Password: %s",
 149                         password);
 150         }
 151         if (password) {
 152                 g_free(password);
 153                 password = NULL;
 154         }
 155
 156         offset = newoffset;
 157
 158         offset = dissect_rpc_string(tvb, pinfo, tree,
 159                 hf_pcnfsd_comment, offset, NULL);
 160
 161         return offset;
 162 }
 163
 164
 165 /* "NFS Illustrated" 14.7.13 */
 166 int
 167 dissect_pcnfsd2_auth_reply(tvbuff_t *tvb, int offset, packet_info *pinfo,
 168         proto_tree *tree)
 169 {
 170         int     gids_count;
 171         proto_item      *gitem = NULL;
 172         proto_tree      *gtree = NULL;
 173         int     gids_i;
 174
 175         offset = dissect_rpc_uint32(tvb, pinfo, tree, hf_pcnfsd_status, offset);
 176         offset = dissect_rpc_uint32(tvb, pinfo, tree, hf_pcnfsd_uid, offset);
 177         offset = dissect_rpc_uint32(tvb, pinfo, tree, hf_pcnfsd_gid, offset);
 178         gids_count = tvb_get_ntohl(tvb,offset+0);
 179         if (tree) {
 180                 gitem = proto_tree_add_text(tree, tvb,
 181                         offset, 4+gids_count*4, "Group IDs: %d", gids_count);
 182                 gtree = proto_item_add_subtree(gitem, ett_pcnfsd_gids);
 183         }
 184         if (gtree) {
 185                 proto_tree_add_item(gtree, hf_pcnfsd_gids_count, tvb, offset, 4, FALSE);
 186         }
 187         offset += 4;
 188         for (gids_i = 0 ; gids_i < gids_count ; gids_i++) {
 189                 offset = dissect_rpc_uint32(tvb, pinfo, gtree,
 190                                 hf_pcnfsd_gid, offset);
 191         }
 192         offset = dissect_rpc_string(tvb, pinfo, tree,
 193                 hf_pcnfsd_homedir, offset, NULL);
 194         /* should be signed int32 */
 195         offset = dissect_rpc_uint32(tvb, pinfo, tree, hf_pcnfsd_def_umask, offset);
 196         offset = dissect_rpc_string(tvb, pinfo, tree,
 197                 hf_pcnfsd_comment, offset, NULL);
 198
 199         return offset;
 200 }
 201
 202
 203 /* "NFS Illustrated", 14.6 */
 204 /* proc number, "proc name", dissect_request, dissect_reply */
 205 /* NULL as function pointer means: type of arguments is "void". */
 206 static const vsff pcnfsd1_proc[] = {
 207         { 0,    "NULL",         NULL,                           NULL },
 208         { 1,    "AUTH",         NULL,                           NULL },
 209         { 2,    "PR_INIT",      NULL,                           NULL },
 210         { 3,    "PR_START",     NULL,                           NULL },
 211         { 0,    NULL,           NULL,                           NULL }
 212 };
 213 /* end of PCNFS version 1 */
 214
 215
 216 /* "NFS Illustrated", 14.7 */
 217 static const vsff pcnfsd2_proc[] = {
 218         { 0,    "NULL",         NULL,                           NULL },
 219         { 1,    "INFO",         NULL,                           NULL },
 220         { 2,    "PR_INIT",      NULL,                           NULL },
 221         { 3,    "PR_START",     NULL,                           NULL },
 222         { 4,    "PR_LIST",      NULL,                           NULL },
 223         { 5,    "PR_QUEUE",     NULL,                           NULL },
 224         { 6,    "PR_STATUS",    NULL,                           NULL },
 225         { 7,    "PR_CANCEL",    NULL,                           NULL },
 226         { 8,    "PR_ADMIN",     NULL,                           NULL },
 227         { 9,    "PR_REQUEUE",   NULL,                           NULL },
 228         { 10,   "PR_HOLD",      NULL,                           NULL },
 229         { 11,   "PR_RELEASE",   NULL,                           NULL },
 230         { 12,   "MAPID",        NULL,                           NULL },
 231         { 13,   "AUTH",
 232         dissect_pcnfsd2_auth_call,      dissect_pcnfsd2_auth_reply },
 233         { 14,   "ALERT",        NULL,                           NULL },
 234         { 0,    NULL,           NULL,                           NULL }
 235 };
 236 /* end of PCNFS version 2 */
 237
 238
 239 void
 240 proto_register_pcnfsd(void)
 241 {
 242         static hf_register_info hf[] = {
 243                 { &hf_pcnfsd_auth_client, {
 244                         "Authentication Client", "pcnfsd.auth.client", FT_STRING, BASE_DEC,
 245                         NULL, 0, "Authentication Client", HFILL }},
 246                 { &hf_pcnfsd_auth_ident_obscure, {
 247                         "Obscure Ident", "pcnfsd.auth.ident.obscure", FT_STRING, BASE_DEC,
 248                         NULL, 0, "Athentication Obscure Ident", HFILL }},
 249                 { &hf_pcnfsd_auth_ident_clear, {
 250                         "Clear Ident", "pcnfsd.auth.ident.clear", FT_STRING, BASE_DEC,
 251                         NULL, 0, "Authentication Clear Ident", HFILL }},
 252                 { &hf_pcnfsd_auth_password_obscure, {
 253                         "Obscure Password", "pcnfsd.auth.password.obscure", FT_STRING, BASE_DEC,
 254                         NULL, 0, "Athentication Obscure Password", HFILL }},
 255                 { &hf_pcnfsd_auth_password_clear, {
 256                         "Clear Password", "pcnfsd.auth.password.clear", FT_STRING, BASE_DEC,
 257                         NULL, 0, "Authentication Clear Password", HFILL }},
 258                 { &hf_pcnfsd_comment, {
 259                         "Comment", "pcnfsd.comment", FT_STRING, BASE_DEC,
 260                         NULL, 0, "Comment", HFILL }},
 261                 { &hf_pcnfsd_status, {
 262                         "Reply Status", "pcnfsd.status", FT_UINT32, BASE_DEC,
 263                         NULL, 0, "Status", HFILL }},
 264                 { &hf_pcnfsd_uid, {
 265                         "User ID", "pcnfsd.uid", FT_UINT32, BASE_DEC,
 266                         NULL, 0, "User ID", HFILL }},
 267                 { &hf_pcnfsd_gid, {
 268                         "Group ID", "pcnfsd.gid", FT_UINT32, BASE_DEC,
 269                         NULL, 0, "Group ID", HFILL }},
 270                 { &hf_pcnfsd_gids_count, {
 271                         "Group ID Count", "pcnfsd.gids.count", FT_UINT32, BASE_DEC,
 272                         NULL, 0, "Group ID Count", HFILL }},
 273                 { &hf_pcnfsd_homedir, {
 274                         "Home Directory", "pcnfsd.homedir", FT_STRING, BASE_DEC,
 275                         NULL, 0, "Home Directory", HFILL }},
 276                 { &hf_pcnfsd_def_umask, {
 277                         "def_umask", "pcnfsd.def_umask", FT_INT32, BASE_OCT,
 278                         NULL, 0, "def_umask", HFILL }},
 279         };
 280
 281         static gint *ett[] = {
 282                 &ett_pcnfsd,
 283                 &ett_pcnfsd_auth_ident,
 284                 &ett_pcnfsd_auth_password,
 285                 &ett_pcnfsd_gids
 286         };
 287
 288         proto_pcnfsd = proto_register_protocol("PC NFS",
 289             "PCNFSD", "pcnfsd");
 290         proto_register_field_array(proto_pcnfsd, hf, array_length(hf));
 291         proto_register_subtree_array(ett, array_length(ett));
 292 }
 293
 294 void
 295 proto_reg_handoff_pcnfsd(void)
 296 {
 297         /* Register the protocol as RPC */
 298         rpc_init_prog(proto_pcnfsd, PCNFSD_PROGRAM, ett_pcnfsd);
 299         /* Register the procedure tables */
 300         rpc_init_proc_table(PCNFSD_PROGRAM, 1, pcnfsd1_proc);
 301         rpc_init_proc_table(PCNFSD_PROGRAM, 2, pcnfsd2_proc);
 302 }
 303