epan/plugins.c

   1 /* plugins.c
   2  * plugin routines
   3  *
   4  * $Id: plugins.c,v 1.65 2003/04/24 21:15:12 guy Exp $
   5  *
   6  * Ethereal - Network traffic analyzer
   7  * By Gerald Combs <gerald@ethereal.com>
   8  * Copyright 1999 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #ifdef NEED_SNPRINTF_H
  30 # include "snprintf.h"
  31 #endif
  32
  33 #include "plugins.h"
  34
  35 #ifdef HAVE_PLUGINS
  36
  37 #include <time.h>
  38
  39 #ifdef HAVE_DIRENT_H
  40 #include <dirent.h>
  41 #endif
  42
  43 #ifdef HAVE_DIRECT_H
  44 #include <direct.h>
  45 #endif
  46
  47 #include <string.h>
  48 #include <stdlib.h>
  49 #include <errno.h>
  50
  51 #ifdef HAVE_SYS_STAT_H
  52 #include <sys/stat.h>
  53 #endif
  54
  55 #ifdef HAVE_UNISTD_H
  56 #include <unistd.h>
  57 #endif
  58
  59 #include "filesystem.h"
  60
  61 #ifdef PLUGINS_NEED_ADDRESS_TABLE
  62 #include "conversation.h"
  63 #include "reassemble.h"
  64 #include "prefs.h"
  65 #include "packet-giop.h"
  66 #include "packet-tpkt.h"
  67 #include "packet-tcp.h"
  68 #include "tap.h"
  69 #include "asn1.h"
  70 #include "plugins/plugin_table.h"
  71 static plugin_address_table_t   patable;
  72 #endif
  73
  74 /* linked list of all plugins */
  75 plugin *plugin_list;
  76
  77 static gchar *user_plug_dir = NULL;
  78
  79 #define PLUGINS_DIR_NAME        "plugins"
  80
  81 /*
  82  * add a new plugin to the list
  83  * returns :
  84  * - 0 : OK
  85  * - ENOMEM : memory allocation problem
  86  * - EEXIST : the same plugin (i.e. name/version) was already registered.
  87  */
  88 static int
  89 add_plugin(void *handle, gchar *name, gchar *version,
  90            void (*reg_handoff)(void))
  91 {
  92     plugin *new_plug, *pt_plug;
  93
  94     pt_plug = plugin_list;
  95     if (!pt_plug) /* the list is empty */
  96     {
  97         new_plug = (plugin *)g_malloc(sizeof(plugin));
  98         if (new_plug == NULL) return ENOMEM;
  99         plugin_list = new_plug;
 100     }
 101     else
 102     {
 103         while (1)
 104         {
 105             /* check if the same name/version is already registered */
 106             if (!strcmp(pt_plug->name, name) &&
 107                 !strcmp(pt_plug->version, version))
 108             {
 109                 return EEXIST;
 110             }
 111
 112             /* we found the last plugin in the list */
 113             if (pt_plug->next == NULL) break;
 114
 115             pt_plug = pt_plug->next;
 116         }
 117         new_plug = (plugin *)g_malloc(sizeof(plugin));
 118         if (new_plug == NULL) return ENOMEM;
 119         pt_plug->next = new_plug;
 120     }
 121
 122     new_plug->handle = handle;
 123     new_plug->name = name;
 124     new_plug->version = version;
 125     new_plug->reg_handoff = reg_handoff;
 126     new_plug->next = NULL;
 127     return 0;
 128 }
 129
 130 /*
 131  * XXX - when we remove support for old-style plugins (which we should
 132  * probably do eventually, as all plugins should be written as new-style
 133  * ones), we may want to have "init_plugins()" merely save a pointer
 134  * to the plugin's "init" routine, just as we save a pointer to its
 135  * "reg_handoff" routine, and have a "register_all_plugins()" routine
 136  * to go through the list of plugins and call all of them.
 137  *
 138  * Then we'd have "epan_init()", or perhaps even something higher up
 139  * in the call tree, call "init_plugins()", and have "proto_init()"
 140  * call "register_all_plugins()" right after calling "register_all_protocols()";
 141  * this might be a bit cleaner.
 142  */
 143 static void
 144 plugins_scan_dir(const char *dirname)
 145 {
 146 #define FILENAME_LEN    1024
 147     gchar         *hack_path;       /* pathname used to construct lt_lib_ext */
 148     gchar         *lt_lib_ext;      /* extension for loadable modules */
 149     DIR           *dir;             /* scanned directory */
 150     struct dirent *file;            /* current file */
 151     gchar          filename[FILENAME_LEN];   /* current file name */
 152     GModule       *handle;          /* handle returned by dlopen */
 153     gchar         *name;
 154     gchar         *version;
 155     void         (*init)(void *);
 156     void         (*reg_handoff)(void);
 157     gchar         *dot;
 158     int            cr;
 159
 160     /*
 161      * We find the extension used on this platform for loadable modules
 162      * by the sneaky hack of calling "g_module_build_path" to build
 163      * the pathname for a module with an empty directory name and
 164      * empty module name, and then search for the last "." and use
 165      * everything from the last "." on.
 166      *
 167      * GLib 2.0 will probably define G_MODULE_SUFFIX as the extension
 168      * to use, but that's not checked into the GLib CVS tree yet,
 169      * and we can't use it on systems that don't have GLib 2.0.
 170      */
 171     hack_path = g_module_build_path("", "");
 172     lt_lib_ext = strrchr(hack_path, '.');
 173     if (lt_lib_ext == NULL)
 174     {
 175         /*
 176          * Does this mean there *is* no extension?  Assume so.
 177          *
 178          * XXX - the code below assumes that all loadable modules have
 179          * an extension....
 180          */
 181         lt_lib_ext = "";
 182     }
 183
 184     if ((dir = opendir(dirname)) != NULL)
 185     {
 186         while ((file = readdir(dir)) != NULL)
 187         {
 188             /* don't try to open "." and ".." */
 189             if (!(strcmp(file->d_name, "..") &&
 190                   strcmp(file->d_name, "."))) continue;
 191
 192             /* skip anything but files with lt_lib_ext */
 193             dot = strrchr(file->d_name, '.');
 194             if (dot == NULL || strcmp(dot, lt_lib_ext) != 0) continue;
 195
 196             snprintf(filename, FILENAME_LEN, "%s" G_DIR_SEPARATOR_S "%s",
 197                 dirname, file->d_name);
 198             if ((handle = g_module_open(filename, 0)) == NULL)
 199             {
 200                 g_warning("Couldn't load module %s: %s", filename,
 201                           g_module_error());
 202                 continue;
 203             }
 204             name = (gchar *)file->d_name;
 205             if (g_module_symbol(handle, "version", (gpointer*)&version) == FALSE)
 206             {
 207                 g_warning("The plugin %s has no version symbol", name);
 208                 g_module_close(handle);
 209                 continue;
 210             }
 211
 212             /*
 213              * Old-style dissectors don't have a "plugin_reg_handoff()"
 214              * routine; we no longer support them.
 215              *
 216              * New-style dissectors have one, because, otherwise, there's
 217              * no way for them to arrange that they ever be called.
 218              */
 219             if (g_module_symbol(handle, "plugin_reg_handoff",
 220                                          (gpointer*)&reg_handoff))
 221             {
 222                 /*
 223                  * We require it to have a "plugin_init()" routine.
 224                  */
 225                 if (!g_module_symbol(handle, "plugin_init", (gpointer*)&init))
 226                 {
 227                     g_warning("The plugin %s has a plugin_reg_handoff symbol but no plugin_init routine",
 228                               name);
 229                     g_module_close(handle);
 230                     continue;
 231                 }
 232
 233                 /*
 234                  * We have a "plugin_reg_handoff()" routine, so we don't
 235                  * need the protocol, filter string, or dissector pointer.
 236                  */
 237                 if ((cr = add_plugin(handle, g_strdup(file->d_name), version,
 238                                      reg_handoff)))
 239                 {
 240                     if (cr == EEXIST)
 241                         fprintf(stderr, "The plugin %s, version %s\n"
 242                             "was found in multiple directories\n", name, version);
 243                     else
 244                         fprintf(stderr, "Memory allocation problem\n"
 245                             "when processing plugin %s, version %s\n",
 246                             name, version);
 247                     g_module_close(handle);
 248                     continue;
 249                 }
 250
 251                 /*
 252                  * Call its init routine.
 253                  */
 254 #ifdef PLUGINS_NEED_ADDRESS_TABLE
 255                 init(&patable);
 256 #else
 257                 init(NULL);
 258 #endif
 259             }
 260             else
 261             {
 262                 /*
 263                  * This is an old-style dissector; warn that it won't
 264                  * be used, as those aren't supported.
 265                  */
 266                 fprintf(stderr,
 267                     "The plugin %s, version %s is an old-style plugin;\n"
 268                     "Those are no longer supported.\n", name, version);
 269             }
 270         }
 271         closedir(dir);
 272     }
 273     g_free(hack_path);
 274 }
 275
 276 /*
 277  * init plugins
 278  */
 279 void
 280 init_plugins(const char *plugin_dir)
 281 {
 282 #ifdef WIN32
 283     const char *datafile_dir;
 284     char *install_plugin_dir;
 285 #endif
 286
 287     if (plugin_list == NULL)      /* ensure init_plugins is only run once */
 288     {
 289 #ifdef PLUGINS_NEED_ADDRESS_TABLE
 290         /* Intialize address table */
 291         patable.p_check_col                     = check_col;
 292         patable.p_col_clear                     = col_clear;
 293         patable.p_col_add_fstr                  = col_add_fstr;
 294         patable.p_col_append_fstr               = col_append_fstr;
 295         patable.p_col_prepend_fstr              = col_prepend_fstr;
 296         patable.p_col_add_str                   = col_add_str;
 297         patable.p_col_append_str                = col_append_str;
 298         patable.p_col_set_str                   = col_set_str;
 299
 300         patable.p_register_init_routine         = register_init_routine;
 301         patable.p_register_postseq_cleanup_routine      = register_postseq_cleanup_routine;
 302
 303         patable.p_match_strval                  = match_strval;
 304         patable.p_val_to_str                    = val_to_str;
 305
 306         patable.p_conversation_new              = conversation_new;
 307         patable.p_find_conversation             = find_conversation;
 308         patable.p_conversation_set_dissector    = conversation_set_dissector;
 309
 310         patable.p_proto_register_protocol       = proto_register_protocol;
 311         patable.p_proto_register_field_array    = proto_register_field_array;
 312         patable.p_proto_register_subtree_array  = proto_register_subtree_array;
 313
 314         patable.p_dissector_add                 = dissector_add;
 315         patable.p_dissector_delete              = dissector_delete;
 316         patable.p_dissector_add_handle          = dissector_add_handle;
 317
 318         patable.p_heur_dissector_add            = heur_dissector_add;
 319
 320         patable.p_register_dissector            = register_dissector;
 321         patable.p_find_dissector                = find_dissector;
 322         patable.p_create_dissector_handle       = create_dissector_handle;
 323         patable.p_call_dissector                = call_dissector;
 324
 325         patable.p_tcp_dissect_pdus              = tcp_dissect_pdus;
 326
 327         patable.p_proto_is_protocol_enabled     = proto_is_protocol_enabled;
 328
 329         patable.p_proto_item_get_len            = proto_item_get_len;
 330         patable.p_proto_item_set_len            = proto_item_set_len;
 331         patable.p_proto_item_set_text           = proto_item_set_text;
 332         patable.p_proto_item_append_text        = proto_item_append_text;
 333         patable.p_proto_item_add_subtree        = proto_item_add_subtree;
 334         patable.p_proto_tree_add_item           = proto_tree_add_item;
 335         patable.p_proto_tree_add_item_hidden    = proto_tree_add_item_hidden;
 336         patable.p_proto_tree_add_none_format    = proto_tree_add_none_format;
 337         patable.p_proto_tree_add_protocol_format = proto_tree_add_protocol_format;
 338         patable.p_proto_tree_add_bytes          = proto_tree_add_bytes;
 339         patable.p_proto_tree_add_bytes_hidden   = proto_tree_add_bytes_hidden;
 340         patable.p_proto_tree_add_bytes_format   = proto_tree_add_bytes_format;
 341         patable.p_proto_tree_add_time           = proto_tree_add_time;
 342         patable.p_proto_tree_add_time_hidden    = proto_tree_add_time_hidden;
 343         patable.p_proto_tree_add_time_format    = proto_tree_add_time_format;
 344         patable.p_proto_tree_add_ipxnet         = proto_tree_add_ipxnet;
 345         patable.p_proto_tree_add_ipxnet_hidden  = proto_tree_add_ipxnet_hidden;
 346         patable.p_proto_tree_add_ipxnet_format  = proto_tree_add_ipxnet_format;
 347         patable.p_proto_tree_add_ipv4           = proto_tree_add_ipv4;
 348         patable.p_proto_tree_add_ipv4_hidden    = proto_tree_add_ipv4_hidden;
 349         patable.p_proto_tree_add_ipv4_format    = proto_tree_add_ipv4_format;
 350         patable.p_proto_tree_add_ipv6           = proto_tree_add_ipv6;
 351         patable.p_proto_tree_add_ipv6_hidden    = proto_tree_add_ipv6_hidden;
 352         patable.p_proto_tree_add_ipv6_format    = proto_tree_add_ipv6_format;
 353         patable.p_proto_tree_add_ether          = proto_tree_add_ether;
 354         patable.p_proto_tree_add_ether_hidden   = proto_tree_add_ether_hidden;
 355         patable.p_proto_tree_add_ether_format   = proto_tree_add_ether_format;
 356         patable.p_proto_tree_add_string         = proto_tree_add_string;
 357         patable.p_proto_tree_add_string_hidden  = proto_tree_add_string_hidden;
 358         patable.p_proto_tree_add_string_format  = proto_tree_add_string_format;
 359         patable.p_proto_tree_add_boolean        = proto_tree_add_boolean;
 360         patable.p_proto_tree_add_boolean_hidden = proto_tree_add_boolean_hidden;
 361         patable.p_proto_tree_add_boolean_format = proto_tree_add_boolean_format;
 362         patable.p_proto_tree_add_double         = proto_tree_add_double;
 363         patable.p_proto_tree_add_double_hidden  = proto_tree_add_double_hidden;
 364         patable.p_proto_tree_add_double_format  = proto_tree_add_double_format;
 365         patable.p_proto_tree_add_uint           = proto_tree_add_uint;
 366         patable.p_proto_tree_add_uint_hidden    = proto_tree_add_uint_hidden;
 367         patable.p_proto_tree_add_uint_format    = proto_tree_add_uint_format;
 368         patable.p_proto_tree_add_int            = proto_tree_add_int;
 369         patable.p_proto_tree_add_int_hidden     = proto_tree_add_int_hidden;
 370         patable.p_proto_tree_add_int_format     = proto_tree_add_int_format;
 371         patable.p_proto_tree_add_text           = proto_tree_add_text;
 372
 373         patable.p_tvb_new_subset                = tvb_new_subset;
 374         patable.p_tvb_set_free_cb               = tvb_set_free_cb;
 375         patable.p_tvb_set_child_real_data_tvbuff = tvb_set_child_real_data_tvbuff;
 376         patable.p_tvb_new_real_data             = tvb_new_real_data;
 377
 378         patable.p_tvb_length                    = tvb_length;
 379         patable.p_tvb_length_remaining          = tvb_length_remaining;
 380         patable.p_tvb_bytes_exist               = tvb_bytes_exist;
 381         patable.p_tvb_offset_exists             = tvb_offset_exists;
 382         patable.p_tvb_reported_length           = tvb_reported_length;
 383         patable.p_tvb_reported_length_remaining = tvb_reported_length_remaining;
 384
 385         patable.p_tvb_get_guint8                = tvb_get_guint8;
 386
 387         patable.p_tvb_get_ntohs                 = tvb_get_ntohs;
 388         patable.p_tvb_get_ntoh24                = tvb_get_ntoh24;
 389         patable.p_tvb_get_ntohl                 = tvb_get_ntohl;
 390
 391         patable.p_tvb_get_letohs                = tvb_get_letohs;
 392         patable.p_tvb_get_letoh24               = tvb_get_letoh24;
 393         patable.p_tvb_get_letohl                = tvb_get_letohl;
 394
 395         patable.p_tvb_memcpy                    = tvb_memcpy;
 396         patable.p_tvb_memdup                    = tvb_memdup;
 397
 398         patable.p_tvb_get_ptr                   = tvb_get_ptr;
 399
 400         patable.p_tvb_find_guint8               = tvb_find_guint8;
 401         patable.p_tvb_pbrk_guint8               = tvb_pbrk_guint8;
 402
 403         patable.p_tvb_strnlen                   = tvb_strnlen;
 404
 405         patable.p_tvb_format_text               = tvb_format_text;
 406
 407         patable.p_tvb_get_nstringz              = tvb_get_nstringz;
 408         patable.p_tvb_get_nstringz0             = tvb_get_nstringz0;
 409
 410         patable.p_tvb_find_line_end             = tvb_find_line_end;
 411         patable.p_tvb_find_line_end_unquoted    = tvb_find_line_end_unquoted;
 412
 413         patable.p_tvb_strneql                   = tvb_strneql;
 414         patable.p_tvb_strncaseeql               = tvb_strncaseeql;
 415
 416         patable.p_tvb_bytes_to_str              = tvb_bytes_to_str;
 417
 418         patable.p_prefs_register_protocol       = prefs_register_protocol;
 419         patable.p_prefs_register_uint_preference = prefs_register_uint_preference;
 420         patable.p_prefs_register_bool_preference = prefs_register_bool_preference;
 421         patable.p_prefs_register_enum_preference = prefs_register_enum_preference;
 422         patable.p_prefs_register_string_preference = prefs_register_string_preference;
 423
 424         patable.p_register_giop_user            = register_giop_user;
 425         patable.p_is_big_endian                 = is_big_endian;
 426         patable.p_get_CDR_encap_info            = get_CDR_encap_info;
 427
 428         patable.p_get_CDR_any                   = get_CDR_any;
 429         patable.p_get_CDR_boolean               = get_CDR_boolean;
 430         patable.p_get_CDR_char                  = get_CDR_char;
 431         patable.p_get_CDR_double                = get_CDR_double;
 432         patable.p_get_CDR_enum                  = get_CDR_enum;
 433         patable.p_get_CDR_fixed                 = get_CDR_fixed;
 434         patable.p_get_CDR_float                 = get_CDR_float;
 435         patable.p_get_CDR_interface             = get_CDR_interface;
 436         patable.p_get_CDR_long                  = get_CDR_long;
 437         patable.p_get_CDR_object                = get_CDR_object;
 438         patable.p_get_CDR_octet                 = get_CDR_octet;
 439         patable.p_get_CDR_octet_seq             = get_CDR_octet_seq;
 440         patable.p_get_CDR_short                 = get_CDR_short;
 441         patable.p_get_CDR_string                = get_CDR_string;
 442         patable.p_get_CDR_typeCode              = get_CDR_typeCode;
 443         patable.p_get_CDR_ulong                 = get_CDR_ulong;
 444         patable.p_get_CDR_ushort                = get_CDR_ushort;
 445         patable.p_get_CDR_wchar                 = get_CDR_wchar;
 446         patable.p_get_CDR_wstring               = get_CDR_wstring;
 447
 448         patable.p_is_tpkt                       = is_tpkt;
 449         patable.p_dissect_tpkt_encap            = dissect_tpkt_encap;
 450
 451         patable.p_set_actual_length             = set_actual_length;
 452         patable.p_decode_boolean_bitfield       = decode_boolean_bitfield;
 453         patable.p_decode_numeric_bitfield       = decode_numeric_bitfield;
 454         patable.p_decode_enumerated_bitfield    = decode_enumerated_bitfield;
 455         patable.p_register_dissector_table      = register_dissector_table;
 456         patable.p_except_throw                  = except_throw;
 457         patable.p_dissector_try_port            = dissector_try_port;
 458
 459         patable.p_conversation_add_proto_data   = conversation_add_proto_data;
 460         patable.p_conversation_get_proto_data   = conversation_get_proto_data;
 461         patable.p_conversation_delete_proto_data = conversation_delete_proto_data;
 462         patable.p_p_add_proto_data              = p_add_proto_data;
 463         patable.p_p_get_proto_data              = p_get_proto_data;
 464
 465         patable.p_ip_to_str                     = ip_to_str;
 466         patable.p_ip6_to_str                    = ip6_to_str;
 467         patable.p_time_secs_to_str              = time_secs_to_str;
 468         patable.p_time_msecs_to_str             = time_msecs_to_str;
 469         patable.p_abs_time_to_str               = abs_time_to_str;
 470
 471         patable.p_proto_get_id_by_filter_name   = proto_get_id_by_filter_name;
 472         patable.p_proto_get_protocol_name       = proto_get_protocol_name;
 473         patable.p_proto_get_protocol_short_name = proto_get_protocol_short_name;
 474         patable.p_proto_get_protocol_filter_name        = proto_get_protocol_filter_name;
 475
 476         patable.p_prefs_register_obsolete_preference    = prefs_register_obsolete_preference;
 477
 478         patable.p_add_new_data_source           = add_new_data_source;
 479
 480         patable.p_fragment_table_init           = fragment_table_init;
 481         patable.p_reassembled_table_init        = reassembled_table_init;
 482         patable.p_fragment_add                  = fragment_add;
 483         patable.p_fragment_add_seq              = fragment_add_seq;
 484         patable.p_fragment_add_seq_check        = fragment_add_seq_check;
 485         patable.p_fragment_add_seq_next         = fragment_add_seq_next;
 486         patable.p_fragment_get                  = fragment_get;
 487         patable.p_fragment_set_tot_len          = fragment_set_tot_len;
 488         patable.p_fragment_get_tot_len          = fragment_get_tot_len;
 489         patable.p_fragment_set_partial_reassembly       = fragment_set_partial_reassembly;
 490         patable.p_fragment_delete               = fragment_delete;
 491         patable.p_show_fragment_tree            = show_fragment_tree;
 492         patable.p_show_fragment_seq_tree        = show_fragment_seq_tree;
 493
 494         patable.p_register_tap                  = register_tap;
 495         patable.p_tap_queue_packet              = tap_queue_packet;
 496
 497         patable.p_asn1_open                     = asn1_open;
 498         patable.p_asn1_close                    = asn1_close;
 499         patable.p_asn1_octet_decode             = asn1_octet_decode;
 500         patable.p_asn1_tag_decode               = asn1_tag_decode;
 501         patable.p_asn1_id_decode                = asn1_id_decode;
 502         patable.p_asn1_length_decode            = asn1_length_decode;
 503         patable.p_asn1_header_decode            = asn1_header_decode;
 504         patable.p_asn1_eoc                      = asn1_eoc;
 505         patable.p_asn1_eoc_decode               = asn1_eoc_decode;
 506         patable.p_asn1_null_decode              = asn1_null_decode;
 507         patable.p_asn1_bool_decode              = asn1_bool_decode;
 508         patable.p_asn1_int32_value_decode       = asn1_int32_value_decode;
 509         patable.p_asn1_int32_decode             = asn1_int32_decode;
 510         patable.p_asn1_uint32_value_decode      = asn1_uint32_value_decode;
 511         patable.p_asn1_uint32_decode            = asn1_uint32_decode;
 512         patable.p_asn1_bits_decode              = asn1_bits_decode;
 513         patable.p_asn1_string_value_decode      = asn1_string_value_decode;
 514         patable.p_asn1_string_decode            = asn1_octet_string_decode;
 515         patable.p_asn1_octet_string_decode      = asn1_octet_string_decode;
 516         patable.p_asn1_subid_decode             = asn1_subid_decode;
 517         patable.p_asn1_oid_value_decode         = asn1_oid_value_decode;
 518         patable.p_asn1_oid_decode               = asn1_oid_decode;
 519         patable.p_asn1_sequence_decode          = asn1_sequence_decode;
 520         patable.p_asn1_err_to_str               = asn1_err_to_str;
 521
 522 #endif
 523
 524 #ifdef WIN32
 525         /*
 526          * On Windows, the data file directory is the installation
 527          * directory; the plugins are stored under it.
 528          *
 529          * Assume we're running the installed version of Ethereal;
 530          * on Windows, the data file directory is the directory
 531          * in which the Ethereal binary resides.
 532          */
 533         datafile_dir = get_datafile_dir();
 534         install_plugin_dir = g_malloc(strlen(datafile_dir) + strlen("plugins") +
 535             strlen(VERSION) + 3);
 536         sprintf(install_plugin_dir, "%s\\plugins\\%s", datafile_dir, VERSION);
 537
 538         /*
 539          * Make sure that pathname refers to a directory.
 540          */
 541         if (test_for_directory(install_plugin_dir) != EISDIR) {
 542                 /*
 543                  * Either it doesn't refer to a directory or it
 544                  * refers to something that doesn't exist.
 545                  *
 546                  * Assume that means we're running, for example,
 547                  * a version of Ethereal we've built in a source
 548                  * directory, and fall back on the default
 549                  * installation directory, so you can put the plugins
 550                  * somewhere so they can be used with this version
 551                  * of Ethereal.
 552                  *
 553                  * XXX - should we, instead, have the Windows build
 554                  * procedure create a subdirectory of the "plugins"
 555                  * source directory, and copy the plugin DLLs there,
 556                  * so that you use the plugins from the build tree?
 557                  */
 558                 install_plugin_dir =
 559                     g_strdup("C:\\Program Files\\Ethereal\\plugins\\" VERSION);
 560         }
 561
 562         /*
 563          * Scan that directory.
 564          */
 565         plugins_scan_dir(install_plugin_dir);
 566         g_free(install_plugin_dir);
 567 #else
 568         /*
 569          * Scan the plugin directory.
 570          */
 571         plugins_scan_dir(plugin_dir);
 572 #endif
 573         if (!user_plug_dir)
 574             user_plug_dir = get_persconffile_path(PLUGINS_DIR_NAME, FALSE);
 575         plugins_scan_dir(user_plug_dir);
 576     }
 577 }
 578
 579 void
 580 register_all_plugin_handoffs(void)
 581 {
 582   plugin *pt_plug;
 583
 584   /*
 585    * For all new-style plugins, call the register-handoff routine.
 586    * This is called from "proto_init()"; it must be called after
 587    * "register_all_protocols()" and "init_plugins()" are called,
 588    * in case one plugin registers itself either with a built-in
 589    * dissector or with another plugin; we must first register all
 590    * dissectors, whether built-in or plugin, so their dissector tables
 591    * are initialized, and only then register all handoffs.
 592    *
 593    * We treat those protocols as always being enabled; they should
 594    * use the standard mechanism for enabling/disabling protocols, not
 595    * the plugin-specific mechanism.
 596    */
 597   for (pt_plug = plugin_list; pt_plug != NULL; pt_plug = pt_plug->next)
 598     (pt_plug->reg_handoff)();
 599 }
 600 #endif