packet-pcnfsd.c

   1 /* packet-pcnfsd.c
   2  * Routines for PCNFSD dissection
   3  *
   4  * $Id: packet-pcnfsd.c,v 1.12 2002/11/01 00:48:38 sahlberg 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 #include <string.h>
  39
  40 #include "packet-rpc.h"
  41 #include "packet-pcnfsd.h"
  42
  43 static int proto_pcnfsd = -1;
  44 static int hf_pcnfsd_procedure_v1 = -1;
  45 static int hf_pcnfsd_procedure_v2 = -1;
  46 static int hf_pcnfsd_auth_client = -1;
  47 static int hf_pcnfsd_auth_ident_obscure = -1;
  48 static int hf_pcnfsd_auth_ident_clear = -1;
  49 static int hf_pcnfsd_auth_password_obscure = -1;
  50 static int hf_pcnfsd_auth_password_clear = -1;
  51 static int hf_pcnfsd_comment = -1;
  52 static int hf_pcnfsd_status = -1;
  53 static int hf_pcnfsd_uid = -1;
  54 static int hf_pcnfsd_gid = -1;
  55 static int hf_pcnfsd_gids_count = -1;
  56 static int hf_pcnfsd_homedir = -1;
  57 static int hf_pcnfsd_def_umask = -1;
  58 static int hf_pcnfsd_username = -1;
  59
  60
  61 static gint ett_pcnfsd = -1;
  62 static gint ett_pcnfsd_auth_ident = -1;
  63 static gint ett_pcnfsd_auth_password = -1;
  64 static gint ett_pcnfsd_gids = -1;
  65
  66 int
  67 dissect_pcnfsd_username(tvbuff_t *tvb, int offset, proto_tree *tree)
  68 {
  69         return dissect_rpc_string(tvb, tree, hf_pcnfsd_username, offset, NULL);
  70 }
  71
  72 #define MAP_REQ_UID             0
  73 #define MAP_REQ_GID             1
  74 #define MAP_REQ_UNAME   2
  75 #define MAP_REQ_GNAME   3
  76
  77 static const value_string names_mapreq[] =
  78 {
  79         {       MAP_REQ_UID,    "MAP_REQ_UID"   },
  80         {       MAP_REQ_GID,    "MAP_REQ_GID"   },
  81         {       MAP_REQ_UNAME,  "MAP_REQ_UNAME" },
  82         {       MAP_REQ_GNAME,  "MAP_REQ_GNAME" },
  83         {       0,      NULL    }
  84 };
  85
  86 int
  87 dissect_pcnfsd_mapreq(tvbuff_t *tvb, int offset, proto_tree *tree)
  88 {
  89         guint32 mapreq;
  90
  91         mapreq = tvb_get_ntohl(tvb, offset + 0);
  92
  93         if (tree)
  94                 proto_tree_add_text(tree, tvb, offset, 4, "Request: %s (%u)",
  95                         val_to_str(mapreq, names_mapreq, "%u"), mapreq);
  96
  97         offset += 4;
  98
  99         return offset;
 100 }
 101
 102 int
 103 dissect_pcnfsd2_dissect_mapreq_arg_item(tvbuff_t *tvb, int offset,
 104         packet_info *pinfo _U_, proto_tree *tree)
 105 {
 106         offset = dissect_pcnfsd_mapreq(tvb, offset, tree);
 107
 108         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_uid, offset);
 109
 110         offset = dissect_pcnfsd_username(tvb, offset, tree);
 111
 112         return offset;
 113 }
 114
 115 int
 116 dissect_pcnfsd2_mapid_call(tvbuff_t *tvb, int offset, packet_info *pinfo,
 117         proto_tree *tree)
 118 {
 119         offset = dissect_rpc_string(tvb, tree, hf_pcnfsd_comment, offset, NULL);
 120
 121         offset = dissect_rpc_list(tvb, pinfo, tree, offset,
 122                 dissect_pcnfsd2_dissect_mapreq_arg_item);
 123
 124         return offset;
 125 }
 126
 127 #define MAP_RES_OK              0
 128 #define MAP_RES_UNKNOWN 1
 129 #define MAP_RES_DENIED  2
 130
 131 static const value_string names_maprstat[] =
 132 {
 133         {       MAP_RES_OK,     "MAP_RES_OK"    },
 134         {       MAP_RES_UNKNOWN,        "MAP_RES_UNKNOWN"       },
 135         {       MAP_RES_DENIED, "MAP_RES_DENIED"        },
 136         {       0,      NULL    }
 137 };
 138
 139 int
 140 dissect_pcnfsd2_dissect_mapreq_res_item(tvbuff_t *tvb, int offset,
 141         packet_info *pinfo _U_, proto_tree *tree)
 142 {
 143         guint32 maprstat;
 144
 145         offset = dissect_pcnfsd_mapreq(tvb, offset, tree);
 146
 147         maprstat = tvb_get_ntohl(tvb, offset + 0);
 148
 149         if (tree)
 150                 proto_tree_add_text(tree, tvb, offset, 4, "Status: %s (%u)",
 151                         val_to_str(maprstat, names_maprstat, "%u"), maprstat);
 152
 153         offset += 4;
 154
 155         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_uid, offset);
 156
 157         offset = dissect_pcnfsd_username(tvb, offset, tree);
 158
 159         return offset;
 160 }
 161
 162 int
 163 dissect_pcnfsd2_mapid_reply(tvbuff_t *tvb, int offset, packet_info *pinfo,
 164         proto_tree *tree)
 165 {
 166         offset = dissect_rpc_string(tvb, tree, hf_pcnfsd_comment, offset, NULL);
 167
 168         offset = dissect_rpc_list(tvb, pinfo, tree, offset,
 169                 dissect_pcnfsd2_dissect_mapreq_res_item);
 170
 171         return offset;
 172 }
 173
 174 /* "NFS Illustrated 14.7.13 */
 175 static void
 176 pcnfsd_decode_obscure(char* data, int len)
 177 {
 178         for ( ; len>0 ; len--, data++) {
 179                 *data = (*data ^ 0x5b) & 0x7f;
 180         }
 181 }
 182
 183
 184 /* "NFS Illustrated" 14.7.13 */
 185 static int
 186 dissect_pcnfsd2_auth_call(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
 187         proto_tree *tree)
 188 {
 189         int     newoffset;
 190         char    *ident = NULL;
 191         proto_item      *ident_item = NULL;
 192         proto_tree      *ident_tree = NULL;
 193         char    *password = NULL;
 194         proto_item      *password_item = NULL;
 195         proto_tree      *password_tree = NULL;
 196
 197         offset = dissect_rpc_string(tvb, tree,
 198                 hf_pcnfsd_auth_client, offset, NULL);
 199
 200         if (tree) {
 201                 ident_item = proto_tree_add_text(tree, tvb,
 202                                 offset, -1, "Authentication Ident");
 203                 if (ident_item)
 204                         ident_tree = proto_item_add_subtree(
 205                                 ident_item, ett_pcnfsd_auth_ident);
 206         }
 207         newoffset = dissect_rpc_string(tvb, ident_tree,
 208                 hf_pcnfsd_auth_ident_obscure, offset, &ident);
 209         if (ident_item) {
 210                 proto_item_set_len(ident_item, newoffset-offset);
 211         }
 212
 213         if (ident) {
 214                 pcnfsd_decode_obscure(ident, strlen(ident));
 215                 if (ident_tree)
 216                         proto_tree_add_string(ident_tree,
 217                                 hf_pcnfsd_auth_ident_clear,
 218                                 tvb, offset+4, strlen(ident), ident);
 219         }
 220         if (ident_item) {
 221                 proto_item_set_text(ident_item, "Authentication Ident: %s",
 222                         ident);
 223         }
 224         if (ident) {
 225                 g_free(ident);
 226                 ident = NULL;
 227         }
 228
 229         offset = newoffset;
 230
 231         if (tree) {
 232                 password_item = proto_tree_add_text(tree, tvb,
 233                                 offset, -1, "Authentication Password");
 234                 if (password_item)
 235                         password_tree = proto_item_add_subtree(
 236                                 password_item, ett_pcnfsd_auth_password);
 237         }
 238         newoffset = dissect_rpc_string(tvb, password_tree,
 239                 hf_pcnfsd_auth_password_obscure, offset, &password);
 240         if (password_item) {
 241                 proto_item_set_len(password_item, newoffset-offset);
 242         }
 243
 244         if (password) {
 245                 pcnfsd_decode_obscure(password, strlen(password));
 246                 if (password_tree)
 247                         proto_tree_add_string(password_tree,
 248                                 hf_pcnfsd_auth_password_clear,
 249                                 tvb, offset+4, strlen(password), password);
 250         }
 251         if (password_item) {
 252                 proto_item_set_text(password_item, "Authentication Password: %s",
 253                         password);
 254         }
 255         if (password) {
 256                 g_free(password);
 257                 password = NULL;
 258         }
 259
 260         offset = newoffset;
 261
 262         offset = dissect_rpc_string(tvb, tree,
 263                 hf_pcnfsd_comment, offset, NULL);
 264
 265         return offset;
 266 }
 267
 268
 269 /* "NFS Illustrated" 14.7.13 */
 270 static int
 271 dissect_pcnfsd2_auth_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
 272         proto_tree *tree)
 273 {
 274         int     gids_count;
 275         proto_item      *gitem = NULL;
 276         proto_tree      *gtree = NULL;
 277         int     gids_i;
 278
 279         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_status, offset);
 280         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_uid, offset);
 281         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_gid, offset);
 282         gids_count = tvb_get_ntohl(tvb,offset+0);
 283         if (tree) {
 284                 gitem = proto_tree_add_text(tree, tvb,
 285                         offset, 4+gids_count*4, "Group IDs: %d", gids_count);
 286                 gtree = proto_item_add_subtree(gitem, ett_pcnfsd_gids);
 287         }
 288         if (gtree) {
 289                 proto_tree_add_item(gtree, hf_pcnfsd_gids_count, tvb, offset, 4, FALSE);
 290         }
 291         offset += 4;
 292         for (gids_i = 0 ; gids_i < gids_count ; gids_i++) {
 293                 offset = dissect_rpc_uint32(tvb, gtree,
 294                                 hf_pcnfsd_gid, offset);
 295         }
 296         offset = dissect_rpc_string(tvb, tree,
 297                 hf_pcnfsd_homedir, offset, NULL);
 298         /* should be signed int32 */
 299         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_def_umask, offset);
 300         offset = dissect_rpc_string(tvb, tree,
 301                 hf_pcnfsd_comment, offset, NULL);
 302
 303         return offset;
 304 }
 305
 306
 307 /* "NFS Illustrated", 14.6 */
 308 /* proc number, "proc name", dissect_request, dissect_reply */
 309 /* NULL as function pointer means: type of arguments is "void". */
 310 static const vsff pcnfsd1_proc[] = {
 311         { 0,    "NULL",         NULL,                           NULL },
 312         { 1,    "AUTH",         NULL,                           NULL },
 313         { 2,    "PR_INIT",      NULL,                           NULL },
 314         { 3,    "PR_START",     NULL,                           NULL },
 315         { 0,    NULL,           NULL,                           NULL }
 316 };
 317 static const value_string pcnfsd1_proc_vals[] = {
 318         { 0,    "NULL" },
 319         { 1,    "AUTH" },
 320         { 2,    "PR_INIT" },
 321         { 3,    "PR_START" },
 322         { 0,    NULL }
 323 };
 324 /* end of PCNFS version 1 */
 325
 326
 327 /* "NFS Illustrated", 14.7 */
 328 static const vsff pcnfsd2_proc[] = {
 329         { 0,    "NULL",         NULL,                           NULL },
 330         { 1,    "INFO",         NULL,                           NULL },
 331         { 2,    "PR_INIT",      NULL,                           NULL },
 332         { 3,    "PR_START",     NULL,                           NULL },
 333         { 4,    "PR_LIST",      NULL,                           NULL },
 334         { 5,    "PR_QUEUE",     NULL,                           NULL },
 335         { 6,    "PR_STATUS",    NULL,                           NULL },
 336         { 7,    "PR_CANCEL",    NULL,                           NULL },
 337         { 8,    "PR_ADMIN",     NULL,                           NULL },
 338         { 9,    "PR_REQUEUE",   NULL,                           NULL },
 339         { 10,   "PR_HOLD",      NULL,                           NULL },
 340         { 11,   "PR_RELEASE",   NULL,                           NULL },
 341         { 12,   "MAPID",
 342         dissect_pcnfsd2_mapid_call, dissect_pcnfsd2_mapid_reply },
 343         { 13,   "AUTH",
 344         dissect_pcnfsd2_auth_call,      dissect_pcnfsd2_auth_reply },
 345         { 14,   "ALERT",        NULL,                           NULL },
 346         { 0,    NULL,           NULL,                           NULL }
 347 };
 348 static const value_string pcnfsd2_proc_vals[] = {
 349         { 0,    "NULL" },
 350         { 1,    "INFO" },
 351         { 2,    "PR_INIT" },
 352         { 3,    "PR_START" },
 353         { 4,    "PR_LIST" },
 354         { 5,    "PR_QUEUE" },
 355         { 6,    "PR_STATUS" },
 356         { 7,    "PR_CANCEL" },
 357         { 8,    "PR_ADMIN" },
 358         { 9,    "PR_REQUEUE" },
 359         { 10,   "PR_HOLD" },
 360         { 11,   "PR_RELEASE" },
 361         { 12,   "MAPID" },
 362         { 13,   "AUTH" },
 363         { 14,   "ALERT" },
 364         { 0,    NULL }
 365 };
 366 /* end of PCNFS version 2 */
 367
 368
 369 void
 370 proto_register_pcnfsd(void)
 371 {
 372         static hf_register_info hf[] = {
 373                 { &hf_pcnfsd_procedure_v1, {
 374                         "V1 Procedure", "pcnfsd.procedure_v1", FT_UINT32, BASE_DEC,
 375                         VALS(pcnfsd1_proc_vals), 0, "V1 Procedure", HFILL }},
 376                 { &hf_pcnfsd_procedure_v2, {
 377                         "V2 Procedure", "pcnfsd.procedure_v2", FT_UINT32, BASE_DEC,
 378                         VALS(pcnfsd2_proc_vals), 0, "V2 Procedure", HFILL }},
 379                 { &hf_pcnfsd_auth_client, {
 380                         "Authentication Client", "pcnfsd.auth.client", FT_STRING, BASE_DEC,
 381                         NULL, 0, "Authentication Client", HFILL }},
 382                 { &hf_pcnfsd_auth_ident_obscure, {
 383                         "Obscure Ident", "pcnfsd.auth.ident.obscure", FT_STRING, BASE_DEC,
 384                         NULL, 0, "Athentication Obscure Ident", HFILL }},
 385                 { &hf_pcnfsd_auth_ident_clear, {
 386                         "Clear Ident", "pcnfsd.auth.ident.clear", FT_STRING, BASE_DEC,
 387                         NULL, 0, "Authentication Clear Ident", HFILL }},
 388                 { &hf_pcnfsd_auth_password_obscure, {
 389                         "Obscure Password", "pcnfsd.auth.password.obscure", FT_STRING, BASE_DEC,
 390                         NULL, 0, "Athentication Obscure Password", HFILL }},
 391                 { &hf_pcnfsd_auth_password_clear, {
 392                         "Clear Password", "pcnfsd.auth.password.clear", FT_STRING, BASE_DEC,
 393                         NULL, 0, "Authentication Clear Password", HFILL }},
 394                 { &hf_pcnfsd_comment, {
 395                         "Comment", "pcnfsd.comment", FT_STRING, BASE_DEC,
 396                         NULL, 0, "Comment", HFILL }},
 397                 { &hf_pcnfsd_status, {
 398                         "Reply Status", "pcnfsd.status", FT_UINT32, BASE_DEC,
 399                         NULL, 0, "Status", HFILL }},
 400                 { &hf_pcnfsd_uid, {
 401                         "User ID", "pcnfsd.uid", FT_UINT32, BASE_DEC,
 402                         NULL, 0, "User ID", HFILL }},
 403                 { &hf_pcnfsd_gid, {
 404                         "Group ID", "pcnfsd.gid", FT_UINT32, BASE_DEC,
 405                         NULL, 0, "Group ID", HFILL }},
 406                 { &hf_pcnfsd_gids_count, {
 407                         "Group ID Count", "pcnfsd.gids.count", FT_UINT32, BASE_DEC,
 408                         NULL, 0, "Group ID Count", HFILL }},
 409                 { &hf_pcnfsd_homedir, {
 410                         "Home Directory", "pcnfsd.homedir", FT_STRING, BASE_DEC,
 411                         NULL, 0, "Home Directory", HFILL }},
 412                 { &hf_pcnfsd_def_umask, {
 413                         "def_umask", "pcnfsd.def_umask", FT_INT32, BASE_OCT,
 414                         NULL, 0, "def_umask", HFILL }},
 415                 { &hf_pcnfsd_username, {
 416                         "User name", "pcnfsd.username", FT_STRING, BASE_DEC,
 417                         NULL, 0, "pcnfsd.username", HFILL }},
 418         };
 419
 420         static gint *ett[] = {
 421                 &ett_pcnfsd,
 422                 &ett_pcnfsd_auth_ident,
 423                 &ett_pcnfsd_auth_password,
 424                 &ett_pcnfsd_gids
 425         };
 426
 427         proto_pcnfsd = proto_register_protocol("PC NFS",
 428             "PCNFSD", "pcnfsd");
 429         proto_register_field_array(proto_pcnfsd, hf, array_length(hf));
 430         proto_register_subtree_array(ett, array_length(ett));
 431 }
 432
 433 void
 434 proto_reg_handoff_pcnfsd(void)
 435 {
 436         /* Register the protocol as RPC */
 437         rpc_init_prog(proto_pcnfsd, PCNFSD_PROGRAM, ett_pcnfsd);
 438         /* Register the procedure tables */
 439         rpc_init_proc_table(PCNFSD_PROGRAM, 1, pcnfsd1_proc, hf_pcnfsd_procedure_v1);
 440         rpc_init_proc_table(PCNFSD_PROGRAM, 2, pcnfsd2_proc, hf_pcnfsd_procedure_v2);
 441 }
 442