epan/plugins.c

   1 /* plugins.c
   2  * plugin routines
   3  *
   4  * $Id: plugins.c,v 1.63 2003/03/06 09:01:43 sahlberg 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 "plugins/plugin_table.h"
  70 static plugin_address_table_t   patable;
  71 #endif
  72
  73 /* linked list of all plugins */
  74 plugin *plugin_list;
  75
  76 static gchar *user_plug_dir = NULL;
  77
  78 #define PLUGINS_DIR_NAME        "plugins"
  79
  80 /*
  81  * add a new plugin to the list
  82  * returns :
  83  * - 0 : OK
  84  * - ENOMEM : memory allocation problem
  85  * - EEXIST : the same plugin (i.e. name/version) was already registered.
  86  */
  87 static int
  88 add_plugin(void *handle, gchar *name, gchar *version,
  89            void (*reg_handoff)(void))
  90 {
  91     plugin *new_plug, *pt_plug;
  92
  93     pt_plug = plugin_list;
  94     if (!pt_plug) /* the list is empty */
  95     {
  96         new_plug = (plugin *)g_malloc(sizeof(plugin));
  97         if (new_plug == NULL) return ENOMEM;
  98         plugin_list = new_plug;
  99     }
 100     else
 101     {
 102         while (1)
 103         {
 104             /* check if the same name/version is already registered */
 105             if (!strcmp(pt_plug->name, name) &&
 106                 !strcmp(pt_plug->version, version))
 107             {
 108                 return EEXIST;
 109             }
 110
 111             /* we found the last plugin in the list */
 112             if (pt_plug->next == NULL) break;
 113
 114             pt_plug = pt_plug->next;
 115         }
 116         new_plug = (plugin *)g_malloc(sizeof(plugin));
 117         if (new_plug == NULL) return ENOMEM;
 118         pt_plug->next = new_plug;
 119     }
 120
 121     new_plug->handle = handle;
 122     new_plug->name = name;
 123     new_plug->version = version;
 124     new_plug->reg_handoff = reg_handoff;
 125     new_plug->next = NULL;
 126     return 0;
 127 }
 128
 129 /*
 130  * XXX - when we remove support for old-style plugins (which we should
 131  * probably do eventually, as all plugins should be written as new-style
 132  * ones), we may want to have "init_plugins()" merely save a pointer
 133  * to the plugin's "init" routine, just as we save a pointer to its
 134  * "reg_handoff" routine, and have a "register_all_plugins()" routine
 135  * to go through the list of plugins and call all of them.
 136  *
 137  * Then we'd have "epan_init()", or perhaps even something higher up
 138  * in the call tree, call "init_plugins()", and have "proto_init()"
 139  * call "register_all_plugins()" right after calling "register_all_protocols()";
 140  * this might be a bit cleaner.
 141  */
 142 static void
 143 plugins_scan_dir(const char *dirname)
 144 {
 145 #define FILENAME_LEN    1024
 146     gchar         *hack_path;       /* pathname used to construct lt_lib_ext */
 147     gchar         *lt_lib_ext;      /* extension for loadable modules */
 148     DIR           *dir;             /* scanned directory */
 149     struct dirent *file;            /* current file */
 150     gchar          filename[FILENAME_LEN];   /* current file name */
 151     GModule       *handle;          /* handle returned by dlopen */
 152     gchar         *name;
 153     gchar         *version;
 154     void         (*init)(void *);
 155     void         (*reg_handoff)(void);
 156     gchar         *dot;
 157     int            cr;
 158
 159     /*
 160      * We find the extension used on this platform for loadable modules
 161      * by the sneaky hack of calling "g_module_build_path" to build
 162      * the pathname for a module with an empty directory name and
 163      * empty module name, and then search for the last "." and use
 164      * everything from the last "." on.
 165      *
 166      * GLib 2.0 will probably define G_MODULE_SUFFIX as the extension
 167      * to use, but that's not checked into the GLib CVS tree yet,
 168      * and we can't use it on systems that don't have GLib 2.0.
 169      */
 170     hack_path = g_module_build_path("", "");
 171     lt_lib_ext = strrchr(hack_path, '.');
 172     if (lt_lib_ext == NULL)
 173     {
 174         /*
 175          * Does this mean there *is* no extension?  Assume so.
 176          *
 177          * XXX - the code below assumes that all loadable modules have
 178          * an extension....
 179          */
 180         lt_lib_ext = "";
 181     }
 182
 183     if ((dir = opendir(dirname)) != NULL)
 184     {
 185         while ((file = readdir(dir)) != NULL)
 186         {
 187             /* don't try to open "." and ".." */
 188             if (!(strcmp(file->d_name, "..") &&
 189                   strcmp(file->d_name, "."))) continue;
 190
 191             /* skip anything but files with lt_lib_ext */
 192             dot = strrchr(file->d_name, '.');
 193             if (dot == NULL || strcmp(dot, lt_lib_ext) != 0) continue;
 194
 195             snprintf(filename, FILENAME_LEN, "%s" G_DIR_SEPARATOR_S "%s",
 196                 dirname, file->d_name);
 197             if ((handle = g_module_open(filename, 0)) == NULL)
 198             {
 199                 g_warning("Couldn't load module %s: %s", filename,
 200                           g_module_error());
 201                 continue;
 202             }
 203             name = (gchar *)file->d_name;
 204             if (g_module_symbol(handle, "version", (gpointer*)&version) == FALSE)
 205             {
 206                 g_warning("The plugin %s has no version symbol", name);
 207                 g_module_close(handle);
 208                 continue;
 209             }
 210
 211             /*
 212              * Old-style dissectors don't have a "plugin_reg_handoff()"
 213              * routine; we no longer support them.
 214              *
 215              * New-style dissectors have one, because, otherwise, there's
 216              * no way for them to arrange that they ever be called.
 217              */
 218             if (g_module_symbol(handle, "plugin_reg_handoff",
 219                                          (gpointer*)&reg_handoff))
 220             {
 221                 /*
 222                  * We require it to have a "plugin_init()" routine.
 223                  */
 224                 if (!g_module_symbol(handle, "plugin_init", (gpointer*)&init))
 225                 {
 226                     g_warning("The plugin %s has a plugin_reg_handoff symbol but no plugin_init routine",
 227                               name);
 228                     g_module_close(handle);
 229                     continue;
 230                 }
 231
 232                 /*
 233                  * We have a "plugin_reg_handoff()" routine, so we don't
 234                  * need the protocol, filter string, or dissector pointer.
 235                  */
 236                 if ((cr = add_plugin(handle, g_strdup(file->d_name), version,
 237                                      reg_handoff)))
 238                 {
 239                     if (cr == EEXIST)
 240                         fprintf(stderr, "The plugin %s, version %s\n"
 241                             "was found in multiple directories\n", name, version);
 242                     else
 243                         fprintf(stderr, "Memory allocation problem\n"
 244                             "when processing plugin %s, version %s\n",
 245                             name, version);
 246                     g_module_close(handle);
 247                     continue;
 248                 }
 249
 250                 /*
 251                  * Call its init routine.
 252                  */
 253 #ifdef PLUGINS_NEED_ADDRESS_TABLE
 254                 init(&patable);
 255 #else
 256                 init(NULL);
 257 #endif
 258             }
 259             else
 260             {
 261                 /*
 262                  * This is an old-style dissector; warn that it won't
 263                  * be used, as those aren't supported.
 264                  */
 265                 fprintf(stderr,
 266                     "The plugin %s, version %s is an old-style plugin;\n"
 267                     "Those are no longer supported.\n", name, version);
 268             }
 269         }
 270         closedir(dir);
 271     }
 272     g_free(hack_path);
 273 }
 274
 275 /*
 276  * init plugins
 277  */
 278 void
 279 init_plugins(const char *plugin_dir)
 280 {
 281 #ifdef WIN32
 282     const char *datafile_dir;
 283     char *install_plugin_dir;
 284 #endif
 285
 286     if (plugin_list == NULL)      /* ensure init_plugins is only run once */
 287     {
 288 #ifdef PLUGINS_NEED_ADDRESS_TABLE
 289         /* Intialize address table */
 290         patable.p_check_col                     = check_col;
 291         patable.p_col_clear                     = col_clear;
 292         patable.p_col_add_fstr                  = col_add_fstr;
 293         patable.p_col_append_fstr               = col_append_fstr;
 294         patable.p_col_prepend_fstr              = col_prepend_fstr;
 295         patable.p_col_add_str                   = col_add_str;
 296         patable.p_col_append_str                = col_append_str;
 297         patable.p_col_set_str                   = col_set_str;
 298
 299         patable.p_register_init_routine         = register_init_routine;
 300         patable.p_register_postseq_cleanup_routine      = register_postseq_cleanup_routine;
 301
 302         patable.p_match_strval                  = match_strval;
 303         patable.p_val_to_str                    = val_to_str;
 304
 305         patable.p_conversation_new              = conversation_new;
 306         patable.p_find_conversation             = find_conversation;
 307         patable.p_conversation_set_dissector    = conversation_set_dissector;
 308
 309         patable.p_proto_register_protocol       = proto_register_protocol;
 310         patable.p_proto_register_field_array    = proto_register_field_array;
 311         patable.p_proto_register_subtree_array  = proto_register_subtree_array;
 312
 313         patable.p_dissector_add                 = dissector_add;
 314         patable.p_dissector_delete              = dissector_delete;
 315         patable.p_dissector_add_handle          = dissector_add_handle;
 316
 317         patable.p_heur_dissector_add            = heur_dissector_add;
 318
 319         patable.p_register_dissector            = register_dissector;
 320         patable.p_find_dissector                = find_dissector;
 321         patable.p_create_dissector_handle       = create_dissector_handle;
 322         patable.p_call_dissector                = call_dissector;
 323
 324         patable.p_tcp_dissect_pdus              = tcp_dissect_pdus;
 325
 326         patable.p_proto_is_protocol_enabled     = proto_is_protocol_enabled;
 327
 328         patable.p_proto_item_get_len            = proto_item_get_len;
 329         patable.p_proto_item_set_len            = proto_item_set_len;
 330         patable.p_proto_item_set_text           = proto_item_set_text;
 331         patable.p_proto_item_append_text        = proto_item_append_text;
 332         patable.p_proto_item_add_subtree        = proto_item_add_subtree;
 333         patable.p_proto_tree_add_item           = proto_tree_add_item;
 334         patable.p_proto_tree_add_item_hidden    = proto_tree_add_item_hidden;
 335         patable.p_proto_tree_add_protocol_format = proto_tree_add_protocol_format;
 336         patable.p_proto_tree_add_bytes          = proto_tree_add_bytes;
 337         patable.p_proto_tree_add_bytes_hidden   = proto_tree_add_bytes_hidden;
 338         patable.p_proto_tree_add_bytes_format   = proto_tree_add_bytes_format;
 339         patable.p_proto_tree_add_time           = proto_tree_add_time;
 340         patable.p_proto_tree_add_time_hidden    = proto_tree_add_time_hidden;
 341         patable.p_proto_tree_add_time_format    = proto_tree_add_time_format;
 342         patable.p_proto_tree_add_ipxnet         = proto_tree_add_ipxnet;
 343         patable.p_proto_tree_add_ipxnet_hidden  = proto_tree_add_ipxnet_hidden;
 344         patable.p_proto_tree_add_ipxnet_format  = proto_tree_add_ipxnet_format;
 345         patable.p_proto_tree_add_ipv4           = proto_tree_add_ipv4;
 346         patable.p_proto_tree_add_ipv4_hidden    = proto_tree_add_ipv4_hidden;
 347         patable.p_proto_tree_add_ipv4_format    = proto_tree_add_ipv4_format;
 348         patable.p_proto_tree_add_ipv6           = proto_tree_add_ipv6;
 349         patable.p_proto_tree_add_ipv6_hidden    = proto_tree_add_ipv6_hidden;
 350         patable.p_proto_tree_add_ipv6_format    = proto_tree_add_ipv6_format;
 351         patable.p_proto_tree_add_ether          = proto_tree_add_ether;
 352         patable.p_proto_tree_add_ether_hidden   = proto_tree_add_ether_hidden;
 353         patable.p_proto_tree_add_ether_format   = proto_tree_add_ether_format;
 354         patable.p_proto_tree_add_string         = proto_tree_add_string;
 355         patable.p_proto_tree_add_string_hidden  = proto_tree_add_string_hidden;
 356         patable.p_proto_tree_add_string_format  = proto_tree_add_string_format;
 357         patable.p_proto_tree_add_boolean        = proto_tree_add_boolean;
 358         patable.p_proto_tree_add_boolean_hidden = proto_tree_add_boolean_hidden;
 359         patable.p_proto_tree_add_boolean_format = proto_tree_add_boolean_format;
 360         patable.p_proto_tree_add_double         = proto_tree_add_double;
 361         patable.p_proto_tree_add_double_hidden  = proto_tree_add_double_hidden;
 362         patable.p_proto_tree_add_double_format  = proto_tree_add_double_format;
 363         patable.p_proto_tree_add_uint           = proto_tree_add_uint;
 364         patable.p_proto_tree_add_uint_hidden    = proto_tree_add_uint_hidden;
 365         patable.p_proto_tree_add_uint_format    = proto_tree_add_uint_format;
 366         patable.p_proto_tree_add_int            = proto_tree_add_int;
 367         patable.p_proto_tree_add_int_hidden     = proto_tree_add_int_hidden;
 368         patable.p_proto_tree_add_int_format     = proto_tree_add_int_format;
 369         patable.p_proto_tree_add_text           = proto_tree_add_text;
 370
 371         patable.p_tvb_new_subset                = tvb_new_subset;
 372         patable.p_tvb_set_free_cb               = tvb_set_free_cb;
 373         patable.p_tvb_set_child_real_data_tvbuff = tvb_set_child_real_data_tvbuff;
 374         patable.p_tvb_new_real_data             = tvb_new_real_data;
 375
 376         patable.p_tvb_length                    = tvb_length;
 377         patable.p_tvb_length_remaining          = tvb_length_remaining;
 378         patable.p_tvb_bytes_exist               = tvb_bytes_exist;
 379         patable.p_tvb_offset_exists             = tvb_offset_exists;
 380         patable.p_tvb_reported_length           = tvb_reported_length;
 381         patable.p_tvb_reported_length_remaining = tvb_reported_length_remaining;
 382
 383         patable.p_tvb_get_guint8                = tvb_get_guint8;
 384
 385         patable.p_tvb_get_ntohs                 = tvb_get_ntohs;
 386         patable.p_tvb_get_ntoh24                = tvb_get_ntoh24;
 387         patable.p_tvb_get_ntohl                 = tvb_get_ntohl;
 388
 389         patable.p_tvb_get_letohs                = tvb_get_letohs;
 390         patable.p_tvb_get_letoh24               = tvb_get_letoh24;
 391         patable.p_tvb_get_letohl                = tvb_get_letohl;
 392
 393         patable.p_tvb_memcpy                    = tvb_memcpy;
 394         patable.p_tvb_memdup                    = tvb_memdup;
 395
 396         patable.p_tvb_get_ptr                   = tvb_get_ptr;
 397
 398         patable.p_tvb_find_guint8               = tvb_find_guint8;
 399         patable.p_tvb_pbrk_guint8               = tvb_pbrk_guint8;
 400
 401         patable.p_tvb_strnlen                   = tvb_strnlen;
 402
 403         patable.p_tvb_format_text               = tvb_format_text;
 404
 405         patable.p_tvb_get_nstringz              = tvb_get_nstringz;
 406         patable.p_tvb_get_nstringz0             = tvb_get_nstringz0;
 407
 408         patable.p_tvb_find_line_end             = tvb_find_line_end;
 409         patable.p_tvb_find_line_end_unquoted    = tvb_find_line_end_unquoted;
 410
 411         patable.p_tvb_strneql                   = tvb_strneql;
 412         patable.p_tvb_strncaseeql               = tvb_strncaseeql;
 413
 414         patable.p_tvb_bytes_to_str              = tvb_bytes_to_str;
 415
 416         patable.p_prefs_register_protocol       = prefs_register_protocol;
 417         patable.p_prefs_register_uint_preference = prefs_register_uint_preference;
 418         patable.p_prefs_register_bool_preference = prefs_register_bool_preference;
 419         patable.p_prefs_register_enum_preference = prefs_register_enum_preference;
 420         patable.p_prefs_register_string_preference = prefs_register_string_preference;
 421
 422         patable.p_register_giop_user            = register_giop_user;
 423         patable.p_is_big_endian                 = is_big_endian;
 424         patable.p_get_CDR_encap_info            = get_CDR_encap_info;
 425
 426         patable.p_get_CDR_any                   = get_CDR_any;
 427         patable.p_get_CDR_boolean               = get_CDR_boolean;
 428         patable.p_get_CDR_char                  = get_CDR_char;
 429         patable.p_get_CDR_double                = get_CDR_double;
 430         patable.p_get_CDR_enum                  = get_CDR_enum;
 431         patable.p_get_CDR_fixed                 = get_CDR_fixed;
 432         patable.p_get_CDR_float                 = get_CDR_float;
 433         patable.p_get_CDR_interface             = get_CDR_interface;
 434         patable.p_get_CDR_long                  = get_CDR_long;
 435         patable.p_get_CDR_object                = get_CDR_object;
 436         patable.p_get_CDR_octet                 = get_CDR_octet;
 437         patable.p_get_CDR_octet_seq             = get_CDR_octet_seq;
 438         patable.p_get_CDR_short                 = get_CDR_short;
 439         patable.p_get_CDR_string                = get_CDR_string;
 440         patable.p_get_CDR_typeCode              = get_CDR_typeCode;
 441         patable.p_get_CDR_ulong                 = get_CDR_ulong;
 442         patable.p_get_CDR_ushort                = get_CDR_ushort;
 443         patable.p_get_CDR_wchar                 = get_CDR_wchar;
 444         patable.p_get_CDR_wstring               = get_CDR_wstring;
 445
 446         patable.p_is_tpkt                       = is_tpkt;
 447         patable.p_dissect_tpkt_encap            = dissect_tpkt_encap;
 448
 449         patable.p_set_actual_length             = set_actual_length;
 450         patable.p_decode_boolean_bitfield       = decode_boolean_bitfield;
 451         patable.p_decode_numeric_bitfield       = decode_numeric_bitfield;
 452         patable.p_decode_enumerated_bitfield    = decode_enumerated_bitfield;
 453         patable.p_register_dissector_table      = register_dissector_table;
 454         patable.p_except_throw                  = except_throw;
 455         patable.p_dissector_try_port            = dissector_try_port;
 456
 457         patable.p_conversation_add_proto_data   = conversation_add_proto_data;
 458         patable.p_conversation_get_proto_data   = conversation_get_proto_data;
 459         patable.p_conversation_delete_proto_data = conversation_delete_proto_data;
 460         patable.p_p_add_proto_data              = p_add_proto_data;
 461         patable.p_p_get_proto_data              = p_get_proto_data;
 462
 463         patable.p_ip_to_str                     = ip_to_str;
 464         patable.p_ip6_to_str                    = ip6_to_str;
 465         patable.p_time_secs_to_str              = time_secs_to_str;
 466         patable.p_time_msecs_to_str             = time_msecs_to_str;
 467         patable.p_abs_time_to_str               = abs_time_to_str;
 468
 469         patable.p_proto_get_id_by_filter_name   = proto_get_id_by_filter_name;
 470         patable.p_proto_get_protocol_name       = proto_get_protocol_name;
 471         patable.p_proto_get_protocol_short_name = proto_get_protocol_short_name;
 472         patable.p_proto_get_protocol_filter_name        = proto_get_protocol_filter_name;
 473
 474         patable.p_prefs_register_obsolete_preference    = prefs_register_obsolete_preference;
 475
 476         patable.p_add_new_data_source           = add_new_data_source;
 477
 478         patable.p_fragment_table_init           = fragment_table_init;
 479         patable.p_reassembled_table_init        = reassembled_table_init;
 480         patable.p_fragment_add                  = fragment_add;
 481         patable.p_fragment_add_seq              = fragment_add_seq;
 482         patable.p_fragment_add_seq_check        = fragment_add_seq_check;
 483         patable.p_fragment_add_seq_next         = fragment_add_seq_next;
 484         patable.p_fragment_get                  = fragment_get;
 485         patable.p_fragment_set_tot_len          = fragment_set_tot_len;
 486         patable.p_fragment_get_tot_len          = fragment_get_tot_len;
 487         patable.p_fragment_set_partial_reassembly       = fragment_set_partial_reassembly;
 488         patable.p_fragment_delete               = fragment_delete;
 489         patable.p_show_fragment_tree            = show_fragment_tree;
 490         patable.p_show_fragment_seq_tree        = show_fragment_seq_tree;
 491
 492         patable.p_register_tap                  = register_tap;
 493         patable.p_tap_queue_packet              = tap_queue_packet;
 494
 495 #endif
 496
 497 #ifdef WIN32
 498         /*
 499          * On Windows, the data file directory is the installation
 500          * directory; the plugins are stored under it.
 501          *
 502          * Assume we're running the installed version of Ethereal;
 503          * on Windows, the data file directory is the directory
 504          * in which the Ethereal binary resides.
 505          */
 506         datafile_dir = get_datafile_dir();
 507         install_plugin_dir = g_malloc(strlen(datafile_dir) + strlen("plugins") +
 508             strlen(VERSION) + 3);
 509         sprintf(install_plugin_dir, "%s\\plugins\\%s", datafile_dir, VERSION);
 510
 511         /*
 512          * Make sure that pathname refers to a directory.
 513          */
 514         if (test_for_directory(install_plugin_dir) != EISDIR) {
 515                 /*
 516                  * Either it doesn't refer to a directory or it
 517                  * refers to something that doesn't exist.
 518                  *
 519                  * Assume that means we're running, for example,
 520                  * a version of Ethereal we've built in a source
 521                  * directory, and fall back on the default
 522                  * installation directory, so you can put the plugins
 523                  * somewhere so they can be used with this version
 524                  * of Ethereal.
 525                  *
 526                  * XXX - should we, instead, have the Windows build
 527                  * procedure create a subdirectory of the "plugins"
 528                  * source directory, and copy the plugin DLLs there,
 529                  * so that you use the plugins from the build tree?
 530                  */
 531                 install_plugin_dir =
 532                     g_strdup("C:\\Program Files\\Ethereal\\plugins\\" VERSION);
 533         }
 534
 535         /*
 536          * Scan that directory.
 537          */
 538         plugins_scan_dir(install_plugin_dir);
 539         g_free(install_plugin_dir);
 540 #else
 541         /*
 542          * Scan the plugin directory.
 543          */
 544         plugins_scan_dir(plugin_dir);
 545 #endif
 546         if (!user_plug_dir)
 547             user_plug_dir = get_persconffile_path(PLUGINS_DIR_NAME, FALSE);
 548         plugins_scan_dir(user_plug_dir);
 549     }
 550 }
 551
 552 void
 553 register_all_plugin_handoffs(void)
 554 {
 555   plugin *pt_plug;
 556
 557   /*
 558    * For all new-style plugins, call the register-handoff routine.
 559    * This is called from "proto_init()"; it must be called after
 560    * "register_all_protocols()" and "init_plugins()" are called,
 561    * in case one plugin registers itself either with a built-in
 562    * dissector or with another plugin; we must first register all
 563    * dissectors, whether built-in or plugin, so their dissector tables
 564    * are initialized, and only then register all handoffs.
 565    *
 566    * We treat those protocols as always being enabled; they should
 567    * use the standard mechanism for enabling/disabling protocols, not
 568    * the plugin-specific mechanism.
 569    */
 570   for (pt_plug = plugin_list; pt_plug != NULL; pt_plug = pt_plug->next)
 571     (pt_plug->reg_handoff)();
 572 }
 573 #endif