packet-pcnfsd.c

   1 /* packet-pcnfsd.c
   2  * Routines for PCNFSD dissection
   3  *
   4  * $Id: packet-pcnfsd.c,v 1.5 2002/01/30 23:08:26 guy Exp $
   5  *
   6  * Ethereal - Network traffic analyzer
   7  * By Gerald Combs <gerald@ethereal.com>
   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 #ifdef HAVE_SYS_TYPES_H
  39 #include <sys/types.h>
  40 #endif
  41
  42 #include <string.h>
  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, -1, "Authentication Ident");
  97                 if (ident_item)
  98                         ident_tree = proto_item_add_subtree(
  99                                 ident_item, ett_pcnfsd_auth_ident);
 100         }
 101         newoffset = dissect_rpc_string(tvb, pinfo, ident_tree,
 102                 hf_pcnfsd_auth_ident_obscure, offset, &ident);
 103         if (ident_item) {
 104                 proto_item_set_len(ident_item, newoffset-offset);
 105         }
 106
 107         if (ident) {
 108                 pcnfsd_decode_obscure(ident, strlen(ident));
 109                 if (ident_tree)
 110                         proto_tree_add_string(ident_tree,
 111                                 hf_pcnfsd_auth_ident_clear,
 112                                 tvb, offset+4, strlen(ident), ident);
 113         }
 114         if (ident_item) {
 115                 proto_item_set_text(ident_item, "Authentication Ident: %s",
 116                         ident);
 117         }
 118         if (ident) {
 119                 g_free(ident);
 120                 ident = NULL;
 121         }
 122
 123         offset = newoffset;
 124
 125         if (tree) {
 126                 password_item = proto_tree_add_text(tree, tvb,
 127                                 offset, -1, "Authentication Password");
 128                 if (password_item)
 129                         password_tree = proto_item_add_subtree(
 130                                 password_item, ett_pcnfsd_auth_password);
 131         }
 132         newoffset = dissect_rpc_string(tvb, pinfo, password_tree,
 133                 hf_pcnfsd_auth_password_obscure, offset, &password);
 134         if (password_item) {
 135                 proto_item_set_len(password_item, newoffset-offset);
 136         }
 137
 138         if (password) {
 139                 pcnfsd_decode_obscure(password, strlen(password));
 140                 if (password_tree)
 141                         proto_tree_add_string(password_tree,
 142                                 hf_pcnfsd_auth_password_clear,
 143                                 tvb, offset+4, strlen(password), password);
 144         }
 145         if (password_item) {
 146                 proto_item_set_text(password_item, "Authentication Password: %s",
 147                         password);
 148         }
 149         if (password) {
 150                 g_free(password);
 151                 password = NULL;
 152         }
 153
 154         offset = newoffset;
 155
 156         offset = dissect_rpc_string(tvb, pinfo, tree,
 157                 hf_pcnfsd_comment, offset, NULL);
 158
 159         return offset;
 160 }
 161
 162
 163 /* "NFS Illustrated" 14.7.13 */
 164 int
 165 dissect_pcnfsd2_auth_reply(tvbuff_t *tvb, int offset, packet_info *pinfo,
 166         proto_tree *tree)
 167 {
 168         int     gids_count;
 169         proto_item      *gitem = NULL;
 170         proto_tree      *gtree = NULL;
 171         int     gids_i;
 172
 173         offset = dissect_rpc_uint32(tvb, pinfo, tree, hf_pcnfsd_status, offset);
 174         offset = dissect_rpc_uint32(tvb, pinfo, tree, hf_pcnfsd_uid, offset);
 175         offset = dissect_rpc_uint32(tvb, pinfo, tree, hf_pcnfsd_gid, offset);
 176         gids_count = tvb_get_ntohl(tvb,offset+0);
 177         if (tree) {
 178                 gitem = proto_tree_add_text(tree, tvb,
 179                         offset, 4+gids_count*4, "Group IDs: %d", gids_count);
 180                 gtree = proto_item_add_subtree(gitem, ett_pcnfsd_gids);
 181         }
 182         if (gtree) {
 183                 proto_tree_add_item(gtree, hf_pcnfsd_gids_count, tvb, offset, 4, FALSE);
 184         }
 185         offset += 4;
 186         for (gids_i = 0 ; gids_i < gids_count ; gids_i++) {
 187                 offset = dissect_rpc_uint32(tvb, pinfo, gtree,
 188                                 hf_pcnfsd_gid, offset);
 189         }
 190         offset = dissect_rpc_string(tvb, pinfo, tree,
 191                 hf_pcnfsd_homedir, offset, NULL);
 192         /* should be signed int32 */
 193         offset = dissect_rpc_uint32(tvb, pinfo, tree, hf_pcnfsd_def_umask, offset);
 194         offset = dissect_rpc_string(tvb, pinfo, tree,
 195                 hf_pcnfsd_comment, offset, NULL);
 196
 197         return offset;
 198 }
 199
 200
 201 /* "NFS Illustrated", 14.6 */
 202 /* proc number, "proc name", dissect_request, dissect_reply */
 203 /* NULL as function pointer means: type of arguments is "void". */
 204 static const vsff pcnfsd1_proc[] = {
 205         { 0,    "NULL",         NULL,                           NULL },
 206         { 1,    "AUTH",         NULL,                           NULL },
 207         { 2,    "PR_INIT",      NULL,                           NULL },
 208         { 3,    "PR_START",     NULL,                           NULL },
 209         { 0,    NULL,           NULL,                           NULL }
 210 };
 211 /* end of PCNFS version 1 */
 212
 213
 214 /* "NFS Illustrated", 14.7 */
 215 static const vsff pcnfsd2_proc[] = {
 216         { 0,    "NULL",         NULL,                           NULL },
 217         { 1,    "INFO",         NULL,                           NULL },
 218         { 2,    "PR_INIT",      NULL,                           NULL },
 219         { 3,    "PR_START",     NULL,                           NULL },
 220         { 4,    "PR_LIST",      NULL,                           NULL },
 221         { 5,    "PR_QUEUE",     NULL,                           NULL },
 222         { 6,    "PR_STATUS",    NULL,                           NULL },
 223         { 7,    "PR_CANCEL",    NULL,                           NULL },
 224         { 8,    "PR_ADMIN",     NULL,                           NULL },
 225         { 9,    "PR_REQUEUE",   NULL,                           NULL },
 226         { 10,   "PR_HOLD",      NULL,                           NULL },
 227         { 11,   "PR_RELEASE",   NULL,                           NULL },
 228         { 12,   "MAPID",        NULL,                           NULL },
 229         { 13,   "AUTH",
 230         dissect_pcnfsd2_auth_call,      dissect_pcnfsd2_auth_reply },
 231         { 14,   "ALERT",        NULL,                           NULL },
 232         { 0,    NULL,           NULL,                           NULL }
 233 };
 234 /* end of PCNFS version 2 */
 235
 236
 237 void
 238 proto_register_pcnfsd(void)
 239 {
 240         static hf_register_info hf[] = {
 241                 { &hf_pcnfsd_auth_client, {
 242                         "Authentication Client", "pcnfsd.auth.client", FT_STRING, BASE_DEC,
 243                         NULL, 0, "Authentication Client", HFILL }},
 244                 { &hf_pcnfsd_auth_ident_obscure, {
 245                         "Obscure Ident", "pcnfsd.auth.ident.obscure", FT_STRING, BASE_DEC,
 246                         NULL, 0, "Athentication Obscure Ident", HFILL }},
 247                 { &hf_pcnfsd_auth_ident_clear, {
 248                         "Clear Ident", "pcnfsd.auth.ident.clear", FT_STRING, BASE_DEC,
 249                         NULL, 0, "Authentication Clear Ident", HFILL }},
 250                 { &hf_pcnfsd_auth_password_obscure, {
 251                         "Obscure Password", "pcnfsd.auth.password.obscure", FT_STRING, BASE_DEC,
 252                         NULL, 0, "Athentication Obscure Password", HFILL }},
 253                 { &hf_pcnfsd_auth_password_clear, {
 254                         "Clear Password", "pcnfsd.auth.password.clear", FT_STRING, BASE_DEC,
 255                         NULL, 0, "Authentication Clear Password", HFILL }},
 256                 { &hf_pcnfsd_comment, {
 257                         "Comment", "pcnfsd.comment", FT_STRING, BASE_DEC,
 258                         NULL, 0, "Comment", HFILL }},
 259                 { &hf_pcnfsd_status, {
 260                         "Reply Status", "pcnfsd.status", FT_UINT32, BASE_DEC,
 261                         NULL, 0, "Status", HFILL }},
 262                 { &hf_pcnfsd_uid, {
 263                         "User ID", "pcnfsd.uid", FT_UINT32, BASE_DEC,
 264                         NULL, 0, "User ID", HFILL }},
 265                 { &hf_pcnfsd_gid, {
 266                         "Group ID", "pcnfsd.gid", FT_UINT32, BASE_DEC,
 267                         NULL, 0, "Group ID", HFILL }},
 268                 { &hf_pcnfsd_gids_count, {
 269                         "Group ID Count", "pcnfsd.gids.count", FT_UINT32, BASE_DEC,
 270                         NULL, 0, "Group ID Count", HFILL }},
 271                 { &hf_pcnfsd_homedir, {
 272                         "Home Directory", "pcnfsd.homedir", FT_STRING, BASE_DEC,
 273                         NULL, 0, "Home Directory", HFILL }},
 274                 { &hf_pcnfsd_def_umask, {
 275                         "def_umask", "pcnfsd.def_umask", FT_INT32, BASE_OCT,
 276                         NULL, 0, "def_umask", HFILL }},
 277         };
 278
 279         static gint *ett[] = {
 280                 &ett_pcnfsd,
 281                 &ett_pcnfsd_auth_ident,
 282                 &ett_pcnfsd_auth_password,
 283                 &ett_pcnfsd_gids
 284         };
 285
 286         proto_pcnfsd = proto_register_protocol("PC NFS",
 287             "PCNFSD", "pcnfsd");
 288         proto_register_field_array(proto_pcnfsd, hf, array_length(hf));
 289         proto_register_subtree_array(ett, array_length(ett));
 290 }
 291
 292 void
 293 proto_reg_handoff_pcnfsd(void)
 294 {
 295         /* Register the protocol as RPC */
 296         rpc_init_prog(proto_pcnfsd, PCNFSD_PROGRAM, ett_pcnfsd);
 297         /* Register the procedure tables */
 298         rpc_init_proc_table(PCNFSD_PROGRAM, 1, pcnfsd1_proc);
 299         rpc_init_proc_table(PCNFSD_PROGRAM, 2, pcnfsd2_proc);
 300 }
 301