packet-pcnfsd.c

   1 /* packet-pcnfsd.c
   2  * Routines for PCNFSD dissection
   3  *
   4  * $Id: packet-pcnfsd.c,v 1.8 2002/05/14 21:22:39 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 static int hf_pcnfsd_username = -1;
  62
  63
  64 static gint ett_pcnfsd = -1;
  65 static gint ett_pcnfsd_auth_ident = -1;
  66 static gint ett_pcnfsd_auth_password = -1;
  67 static gint ett_pcnfsd_gids = -1;
  68
  69 int
  70 dissect_pcnfsd_username(tvbuff_t *tvb, int offset, proto_tree *tree)
  71 {
  72         return dissect_rpc_string(tvb, tree, hf_pcnfsd_username, offset, NULL);
  73 }
  74
  75 #define MAP_REQ_UID             0
  76 #define MAP_REQ_GID             1
  77 #define MAP_REQ_UNAME   2
  78 #define MAP_REQ_GNAME   3
  79
  80 static const value_string names_mapreq[] =
  81 {
  82         {       MAP_REQ_UID,    "MAP_REQ_UID"   },
  83         {       MAP_REQ_GID,    "MAP_REQ_GID"   },
  84         {       MAP_REQ_UNAME,  "MAP_REQ_UNAME" },
  85         {       MAP_REQ_GNAME,  "MAP_REQ_GNAME" },
  86         {       0,      NULL    }
  87 };
  88
  89 int
  90 dissect_pcnfsd_mapreq(tvbuff_t *tvb, int offset, proto_tree *tree)
  91 {
  92         guint32 mapreq;
  93
  94         mapreq = tvb_get_ntohl(tvb, offset + 0);
  95
  96         if (tree)
  97                 proto_tree_add_text(tree, tvb, offset, 4, "Request: %s (%u)",
  98                         val_to_str(mapreq, names_mapreq, "%u"), mapreq);
  99
 100         offset += 4;
 101
 102         return offset;
 103 }
 104
 105 int
 106 dissect_pcnfsd2_dissect_mapreq_arg_item(tvbuff_t *tvb, int offset,
 107         packet_info *pinfo _U_, proto_tree *tree)
 108 {
 109         offset = dissect_pcnfsd_mapreq(tvb, offset, tree);
 110
 111         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_uid, offset);
 112
 113         offset = dissect_pcnfsd_username(tvb, offset, tree);
 114
 115         return offset;
 116 }
 117
 118 int
 119 dissect_pcnfsd2_mapid_call(tvbuff_t *tvb, int offset, packet_info *pinfo,
 120         proto_tree *tree)
 121 {
 122         offset = dissect_rpc_string(tvb, tree, hf_pcnfsd_comment, offset, NULL);
 123
 124         offset = dissect_rpc_list(tvb, pinfo, tree, offset,
 125                 dissect_pcnfsd2_dissect_mapreq_arg_item);
 126
 127         return offset;
 128 }
 129
 130 #define MAP_RES_OK              0
 131 #define MAP_RES_UNKNOWN 1
 132 #define MAP_RES_DENIED  2
 133
 134 static const value_string names_maprstat[] =
 135 {
 136         {       MAP_RES_OK,     "MAP_RES_OK"    },
 137         {       MAP_RES_UNKNOWN,        "MAP_RES_UNKNOWN"       },
 138         {       MAP_RES_DENIED, "MAP_RES_DENIED"        },
 139         {       0,      NULL    }
 140 };
 141
 142 int
 143 dissect_pcnfsd2_dissect_mapreq_res_item(tvbuff_t *tvb, int offset,
 144         packet_info *pinfo _U_, proto_tree *tree)
 145 {
 146         guint32 maprstat;
 147
 148         offset = dissect_pcnfsd_mapreq(tvb, offset, tree);
 149
 150         maprstat = tvb_get_ntohl(tvb, offset + 0);
 151
 152         if (tree)
 153                 proto_tree_add_text(tree, tvb, offset, 4, "Status: %s (%u)",
 154                         val_to_str(maprstat, names_maprstat, "%u"), maprstat);
 155
 156         offset += 4;
 157
 158         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_uid, offset);
 159
 160         offset = dissect_pcnfsd_username(tvb, offset, tree);
 161
 162         return offset;
 163 }
 164
 165 int
 166 dissect_pcnfsd2_mapid_reply(tvbuff_t *tvb, int offset, packet_info *pinfo,
 167         proto_tree *tree)
 168 {
 169         offset = dissect_rpc_string(tvb, tree, hf_pcnfsd_comment, offset, NULL);
 170
 171         offset = dissect_rpc_list(tvb, pinfo, tree, offset,
 172                 dissect_pcnfsd2_dissect_mapreq_res_item);
 173
 174         return offset;
 175 }
 176
 177 /* "NFS Illustrated 14.7.13 */
 178 static void
 179 pcnfsd_decode_obscure(char* data, int len)
 180 {
 181         for ( ; len>0 ; len--, data++) {
 182                 *data = (*data ^ 0x5b) & 0x7f;
 183         }
 184 }
 185
 186
 187 /* "NFS Illustrated" 14.7.13 */
 188 static int
 189 dissect_pcnfsd2_auth_call(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
 190         proto_tree *tree)
 191 {
 192         int     newoffset;
 193         char    *ident = NULL;
 194         proto_item      *ident_item = NULL;
 195         proto_tree      *ident_tree = NULL;
 196         char    *password = NULL;
 197         proto_item      *password_item = NULL;
 198         proto_tree      *password_tree = NULL;
 199
 200         offset = dissect_rpc_string(tvb, tree,
 201                 hf_pcnfsd_auth_client, offset, NULL);
 202
 203         if (tree) {
 204                 ident_item = proto_tree_add_text(tree, tvb,
 205                                 offset, -1, "Authentication Ident");
 206                 if (ident_item)
 207                         ident_tree = proto_item_add_subtree(
 208                                 ident_item, ett_pcnfsd_auth_ident);
 209         }
 210         newoffset = dissect_rpc_string(tvb, ident_tree,
 211                 hf_pcnfsd_auth_ident_obscure, offset, &ident);
 212         if (ident_item) {
 213                 proto_item_set_len(ident_item, newoffset-offset);
 214         }
 215
 216         if (ident) {
 217                 pcnfsd_decode_obscure(ident, strlen(ident));
 218                 if (ident_tree)
 219                         proto_tree_add_string(ident_tree,
 220                                 hf_pcnfsd_auth_ident_clear,
 221                                 tvb, offset+4, strlen(ident), ident);
 222         }
 223         if (ident_item) {
 224                 proto_item_set_text(ident_item, "Authentication Ident: %s",
 225                         ident);
 226         }
 227         if (ident) {
 228                 g_free(ident);
 229                 ident = NULL;
 230         }
 231
 232         offset = newoffset;
 233
 234         if (tree) {
 235                 password_item = proto_tree_add_text(tree, tvb,
 236                                 offset, -1, "Authentication Password");
 237                 if (password_item)
 238                         password_tree = proto_item_add_subtree(
 239                                 password_item, ett_pcnfsd_auth_password);
 240         }
 241         newoffset = dissect_rpc_string(tvb, password_tree,
 242                 hf_pcnfsd_auth_password_obscure, offset, &password);
 243         if (password_item) {
 244                 proto_item_set_len(password_item, newoffset-offset);
 245         }
 246
 247         if (password) {
 248                 pcnfsd_decode_obscure(password, strlen(password));
 249                 if (password_tree)
 250                         proto_tree_add_string(password_tree,
 251                                 hf_pcnfsd_auth_password_clear,
 252                                 tvb, offset+4, strlen(password), password);
 253         }
 254         if (password_item) {
 255                 proto_item_set_text(password_item, "Authentication Password: %s",
 256                         password);
 257         }
 258         if (password) {
 259                 g_free(password);
 260                 password = NULL;
 261         }
 262
 263         offset = newoffset;
 264
 265         offset = dissect_rpc_string(tvb, tree,
 266                 hf_pcnfsd_comment, offset, NULL);
 267
 268         return offset;
 269 }
 270
 271
 272 /* "NFS Illustrated" 14.7.13 */
 273 static int
 274 dissect_pcnfsd2_auth_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
 275         proto_tree *tree)
 276 {
 277         int     gids_count;
 278         proto_item      *gitem = NULL;
 279         proto_tree      *gtree = NULL;
 280         int     gids_i;
 281
 282         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_status, offset);
 283         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_uid, offset);
 284         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_gid, offset);
 285         gids_count = tvb_get_ntohl(tvb,offset+0);
 286         if (tree) {
 287                 gitem = proto_tree_add_text(tree, tvb,
 288                         offset, 4+gids_count*4, "Group IDs: %d", gids_count);
 289                 gtree = proto_item_add_subtree(gitem, ett_pcnfsd_gids);
 290         }
 291         if (gtree) {
 292                 proto_tree_add_item(gtree, hf_pcnfsd_gids_count, tvb, offset, 4, FALSE);
 293         }
 294         offset += 4;
 295         for (gids_i = 0 ; gids_i < gids_count ; gids_i++) {
 296                 offset = dissect_rpc_uint32(tvb, gtree,
 297                                 hf_pcnfsd_gid, offset);
 298         }
 299         offset = dissect_rpc_string(tvb, tree,
 300                 hf_pcnfsd_homedir, offset, NULL);
 301         /* should be signed int32 */
 302         offset = dissect_rpc_uint32(tvb, tree, hf_pcnfsd_def_umask, offset);
 303         offset = dissect_rpc_string(tvb, tree,
 304                 hf_pcnfsd_comment, offset, NULL);
 305
 306         return offset;
 307 }
 308
 309
 310 /* "NFS Illustrated", 14.6 */
 311 /* proc number, "proc name", dissect_request, dissect_reply */
 312 /* NULL as function pointer means: type of arguments is "void". */
 313 static const vsff pcnfsd1_proc[] = {
 314         { 0,    "NULL",         NULL,                           NULL },
 315         { 1,    "AUTH",         NULL,                           NULL },
 316         { 2,    "PR_INIT",      NULL,                           NULL },
 317         { 3,    "PR_START",     NULL,                           NULL },
 318         { 0,    NULL,           NULL,                           NULL }
 319 };
 320 /* end of PCNFS version 1 */
 321
 322
 323 /* "NFS Illustrated", 14.7 */
 324 static const vsff pcnfsd2_proc[] = {
 325         { 0,    "NULL",         NULL,                           NULL },
 326         { 1,    "INFO",         NULL,                           NULL },
 327         { 2,    "PR_INIT",      NULL,                           NULL },
 328         { 3,    "PR_START",     NULL,                           NULL },
 329         { 4,    "PR_LIST",      NULL,                           NULL },
 330         { 5,    "PR_QUEUE",     NULL,                           NULL },
 331         { 6,    "PR_STATUS",    NULL,                           NULL },
 332         { 7,    "PR_CANCEL",    NULL,                           NULL },
 333         { 8,    "PR_ADMIN",     NULL,                           NULL },
 334         { 9,    "PR_REQUEUE",   NULL,                           NULL },
 335         { 10,   "PR_HOLD",      NULL,                           NULL },
 336         { 11,   "PR_RELEASE",   NULL,                           NULL },
 337         { 12,   "MAPID",
 338         dissect_pcnfsd2_mapid_call, dissect_pcnfsd2_mapid_reply },
 339         { 13,   "AUTH",
 340         dissect_pcnfsd2_auth_call,      dissect_pcnfsd2_auth_reply },
 341         { 14,   "ALERT",        NULL,                           NULL },
 342         { 0,    NULL,           NULL,                           NULL }
 343 };
 344 /* end of PCNFS version 2 */
 345
 346
 347 void
 348 proto_register_pcnfsd(void)
 349 {
 350         static hf_register_info hf[] = {
 351                 { &hf_pcnfsd_auth_client, {
 352                         "Authentication Client", "pcnfsd.auth.client", FT_STRING, BASE_DEC,
 353                         NULL, 0, "Authentication Client", HFILL }},
 354                 { &hf_pcnfsd_auth_ident_obscure, {
 355                         "Obscure Ident", "pcnfsd.auth.ident.obscure", FT_STRING, BASE_DEC,
 356                         NULL, 0, "Athentication Obscure Ident", HFILL }},
 357                 { &hf_pcnfsd_auth_ident_clear, {
 358                         "Clear Ident", "pcnfsd.auth.ident.clear", FT_STRING, BASE_DEC,
 359                         NULL, 0, "Authentication Clear Ident", HFILL }},
 360                 { &hf_pcnfsd_auth_password_obscure, {
 361                         "Obscure Password", "pcnfsd.auth.password.obscure", FT_STRING, BASE_DEC,
 362                         NULL, 0, "Athentication Obscure Password", HFILL }},
 363                 { &hf_pcnfsd_auth_password_clear, {
 364                         "Clear Password", "pcnfsd.auth.password.clear", FT_STRING, BASE_DEC,
 365                         NULL, 0, "Authentication Clear Password", HFILL }},
 366                 { &hf_pcnfsd_comment, {
 367                         "Comment", "pcnfsd.comment", FT_STRING, BASE_DEC,
 368                         NULL, 0, "Comment", HFILL }},
 369                 { &hf_pcnfsd_status, {
 370                         "Reply Status", "pcnfsd.status", FT_UINT32, BASE_DEC,
 371                         NULL, 0, "Status", HFILL }},
 372                 { &hf_pcnfsd_uid, {
 373                         "User ID", "pcnfsd.uid", FT_UINT32, BASE_DEC,
 374                         NULL, 0, "User ID", HFILL }},
 375                 { &hf_pcnfsd_gid, {
 376                         "Group ID", "pcnfsd.gid", FT_UINT32, BASE_DEC,
 377                         NULL, 0, "Group ID", HFILL }},
 378                 { &hf_pcnfsd_gids_count, {
 379                         "Group ID Count", "pcnfsd.gids.count", FT_UINT32, BASE_DEC,
 380                         NULL, 0, "Group ID Count", HFILL }},
 381                 { &hf_pcnfsd_homedir, {
 382                         "Home Directory", "pcnfsd.homedir", FT_STRING, BASE_DEC,
 383                         NULL, 0, "Home Directory", HFILL }},
 384                 { &hf_pcnfsd_def_umask, {
 385                         "def_umask", "pcnfsd.def_umask", FT_INT32, BASE_OCT,
 386                         NULL, 0, "def_umask", HFILL }},
 387                 { &hf_pcnfsd_username, {
 388                         "User name", "pcnfsd.username", FT_STRING, BASE_DEC,
 389                         NULL, 0, "pcnfsd.username", HFILL }},
 390         };
 391
 392         static gint *ett[] = {
 393                 &ett_pcnfsd,
 394                 &ett_pcnfsd_auth_ident,
 395                 &ett_pcnfsd_auth_password,
 396                 &ett_pcnfsd_gids
 397         };
 398
 399         proto_pcnfsd = proto_register_protocol("PC NFS",
 400             "PCNFSD", "pcnfsd");
 401         proto_register_field_array(proto_pcnfsd, hf, array_length(hf));
 402         proto_register_subtree_array(ett, array_length(ett));
 403 }
 404
 405 void
 406 proto_reg_handoff_pcnfsd(void)
 407 {
 408         /* Register the protocol as RPC */
 409         rpc_init_prog(proto_pcnfsd, PCNFSD_PROGRAM, ett_pcnfsd);
 410         /* Register the procedure tables */
 411         rpc_init_proc_table(PCNFSD_PROGRAM, 1, pcnfsd1_proc);
 412         rpc_init_proc_table(PCNFSD_PROGRAM, 2, pcnfsd2_proc);
 413 }
 414