epan/dissectors/packet-frame.c

   1 /* packet-frame.c
   2  *
   3  * Top-most dissector. Decides dissector based on Wiretap Encapsulation Type.
   4  *
   5  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 2000 Gerald Combs
   8  *
   9  * SPDX-License-Identifier: GPL-2.0-or-later
  10  */
  11
  12 #include "config.h"
  13
  14 #ifdef _MSC_VER
  15 #include <windows.h>
  16 #endif
  17
  18 #include <epan/packet.h>
  19 #include <epan/capture_dissectors.h>
  20 #include <epan/epan.h>
  21 #include <epan/exceptions.h>
  22 #include <epan/show_exception.h>
  23 #include <epan/timestamp.h>
  24 #include <epan/prefs.h>
  25 #include <epan/to_str.h>
  26 #include <epan/sequence_analysis.h>
  27 #include <wiretap/wtap.h>
  28 #include <epan/tap.h>
  29 #include <epan/expert.h>
  30 #include <wsutil/wsgcrypt.h>
  31 #include <wsutil/str_util.h>
  32 #include <epan/proto_data.h>
  33 #include <wmem/wmem.h>
  34
  35 #include "packet-frame.h"
  36 #include "packet-icmp.h"
  37 #include "log.h"
  38
  39 #include <epan/column-info.h>
  40 #include <epan/color_filters.h>
  41
  42 void proto_register_frame(void);
  43 void proto_reg_handoff_frame(void);
  44
  45 static int proto_frame = -1;
  46 static int proto_pkt_comment = -1;
  47 static int proto_syscall = -1;
  48
  49 static int hf_frame_arrival_time = -1;
  50 static int hf_frame_shift_offset = -1;
  51 static int hf_frame_arrival_time_epoch = -1;
  52 static int hf_frame_time_delta = -1;
  53 static int hf_frame_time_delta_displayed = -1;
  54 static int hf_frame_time_relative = -1;
  55 static int hf_frame_time_reference = -1;
  56 static int hf_frame_number = -1;
  57 static int hf_frame_len = -1;
  58 static int hf_frame_capture_len = -1;
  59 static int hf_frame_p2p_dir = -1;
  60 static int hf_frame_file_off = -1;
  61 static int hf_frame_md5_hash = -1;
  62 static int hf_frame_marked = -1;
  63 static int hf_frame_ignored = -1;
  64 static int hf_link_number = -1;
  65 static int hf_frame_protocols = -1;
  66 static int hf_frame_color_filter_name = -1;
  67 static int hf_frame_color_filter_text = -1;
  68 static int hf_frame_interface_id = -1;
  69 static int hf_frame_interface_name = -1;
  70 static int hf_frame_interface_description = -1;
  71 static int hf_frame_pack_flags = -1;
  72 static int hf_frame_pack_direction = -1;
  73 static int hf_frame_pack_reception_type = -1;
  74 static int hf_frame_pack_fcs_length = -1;
  75 static int hf_frame_pack_reserved = -1;
  76 static int hf_frame_pack_crc_error = -1;
  77 static int hf_frame_pack_wrong_packet_too_long_error = -1;
  78 static int hf_frame_pack_wrong_packet_too_short_error = -1;
  79 static int hf_frame_pack_wrong_inter_frame_gap_error = -1;
  80 static int hf_frame_pack_unaligned_frame_error = -1;
  81 static int hf_frame_pack_start_frame_delimiter_error = -1;
  82 static int hf_frame_pack_preamble_error = -1;
  83 static int hf_frame_pack_symbol_error = -1;
  84 static int hf_frame_wtap_encap = -1;
  85 static int hf_comments_text = -1;
  86
  87 static gint ett_frame = -1;
  88 static gint ett_ifname = -1;
  89 static gint ett_flags = -1;
  90 static gint ett_comments = -1;
  91
  92 static expert_field ei_comments_text = EI_INIT;
  93 static expert_field ei_arrive_time_out_of_range = EI_INIT;
  94 static expert_field ei_incomplete = EI_INIT;
  95
  96 static int frame_tap = -1;
  97
  98 static dissector_handle_t docsis_handle;
  99 static dissector_handle_t sysdig_handle;
 100
 101 /* Preferences */
 102 static gboolean show_file_off       = FALSE;
 103 static gboolean force_docsis_encap  = FALSE;
 104 static gboolean generate_md5_hash   = FALSE;
 105 static gboolean generate_epoch_time = TRUE;
 106 static gboolean generate_bits_field = TRUE;
 107 static gboolean disable_packet_size_limited_in_summary = FALSE;
 108
 109 static const value_string p2p_dirs[] = {
 110         { P2P_DIR_UNKNOWN, "Unknown" },
 111         { P2P_DIR_SENT,    "Sent" },
 112         { P2P_DIR_RECV,    "Received" },
 113         { 0, NULL }
 114 };
 115
 116 #define PACKET_WORD_DIRECTION_MASK                        0x00000003
 117 #define PACKET_WORD_RECEPTION_TYPE_MASK                   0x0000001C
 118 #define PACKET_WORD_FCS_LENGTH_MASK                       0x000001E0
 119 #define PACKET_WORD_RESERVED_MASK                         0x0000FE00
 120 #define PACKET_WORD_CRC_ERR_MASK                          0x01000000
 121 #define PACKET_WORD_PACKET_TOO_LONG_ERR_MASK              0x02000000
 122 #define PACKET_WORD_PACKET_TOO_SHORT_ERR_MASK             0x04000000
 123 #define PACKET_WORD_WRONG_INTER_FRAME_GAP_ERR_MASK        0x08000000
 124 #define PACKET_WORD_UNALIGNED_FRAME_ERR_MASK              0x10000000
 125 #define PACKET_WORD_START_FRAME_DELIMITER_ERR_MASK        0x20000000
 126 #define PACKET_WORD_PREAMBLE_ERR_MASK                     0x40000000
 127 #define PACKET_WORD_SYMBOL_ERR_MASK                       0x80000000
 128
 129 static const value_string packet_word_directions[] = {
 130         { 0x00, "Not available" },
 131         { 0x01, "Inbound" },
 132         { 0x02, "Outbound" },
 133         { 0x03, "Undefined" },
 134         { 0, NULL }
 135 };
 136
 137 static const value_string packet_word_reception_types[] = {
 138         { 0x00, "Not specified" },
 139         { 0x01, "Unicast" },
 140         { 0x02, "Multicast" },
 141         { 0x03, "Broadcast" },
 142         { 0x04, "Promiscuous" },
 143         { 0x05, "Undefined" },
 144         { 0x06, "Undefined" },
 145         { 0x07, "Undefined" },
 146         { 0, NULL }
 147 };
 148
 149 static dissector_table_t wtap_encap_dissector_table;
 150 static dissector_table_t wtap_fts_rec_dissector_table;
 151
 152 /****************************************************************************/
 153 /* whenever a frame packet is seen by the tap listener */
 154 /* Add a new frame into the graph */
 155 static gboolean
 156 frame_seq_analysis_packet( void *ptr, packet_info *pinfo, epan_dissect_t *edt _U_, const void *dummy _U_)
 157 {
 158         seq_analysis_info_t *sainfo = (seq_analysis_info_t *) ptr;
 159         seq_analysis_item_t *sai = sequence_analysis_create_sai_with_addresses(pinfo, sainfo);
 160
 161         if (!sai)
 162                 return FALSE;
 163
 164         sai->frame_number = pinfo->num;
 165
 166         sequence_analysis_use_color_filter(pinfo, sai);
 167
 168         sai->port_src=pinfo->srcport;
 169         sai->port_dst=pinfo->destport;
 170
 171         sequence_analysis_use_col_info_as_label_comment(pinfo, sai);
 172
 173         sai->line_style = 1;
 174         sai->conv_num = 0;
 175         sai->display = TRUE;
 176
 177         g_queue_push_tail(sainfo->items, sai);
 178
 179         return TRUE;
 180 }
 181
 182 /*
 183  * Routine used to register frame end routine.  The routine should only
 184  * be registered when the dissector is used in the frame, not in the
 185  * proto_register_XXX function.
 186  */
 187 void
 188 register_frame_end_routine(packet_info *pinfo, void (*func)(void))
 189 {
 190         pinfo->frame_end_routines = g_slist_append(pinfo->frame_end_routines, (gpointer)func);
 191 }
 192
 193 typedef void (*void_func_t)(void);
 194
 195 static void
 196 call_frame_end_routine(gpointer routine)
 197 {
 198         void_func_t func = (void_func_t)routine;
 199         (*func)();
 200 }
 201
 202 static int
 203 dissect_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void* data)
 204 {
 205         proto_item  *volatile ti = NULL, *comment_item;
 206         guint        cap_len = 0, frame_len = 0;
 207         proto_tree  *volatile tree;
 208         proto_tree  *comments_tree;
 209         proto_tree  *volatile fh_tree = NULL;
 210         proto_item  *item;
 211         const gchar *cap_plurality, *frame_plurality;
 212         frame_data_t *fr_data = (frame_data_t*)data;
 213         const color_filter_t *color_filter;
 214
 215         tree=parent_tree;
 216
 217         DISSECTOR_ASSERT(fr_data);
 218
 219         switch (pinfo->rec->rec_type) {
 220
 221         case REC_TYPE_PACKET:
 222                 pinfo->current_proto = "Frame";
 223                 if (pinfo->rec->presence_flags & WTAP_HAS_PACK_FLAGS) {
 224                         if (pinfo->rec->rec_header.packet_header.pack_flags & 0x00000001)
 225                                 pinfo->p2p_dir = P2P_DIR_RECV;
 226                         if (pinfo->rec->rec_header.packet_header.pack_flags & 0x00000002)
 227                                 pinfo->p2p_dir = P2P_DIR_SENT;
 228                 }
 229
 230                 /*
 231                  * If the pseudo-header *and* the packet record both
 232                  * have direction information, the pseudo-header
 233                  * overrides the packet record.
 234                  */
 235                 if (pinfo->pseudo_header != NULL) {
 236                         switch (pinfo->rec->rec_header.packet_header.pkt_encap) {
 237
 238                         case WTAP_ENCAP_WFLEET_HDLC:
 239                         case WTAP_ENCAP_CHDLC_WITH_PHDR:
 240                         case WTAP_ENCAP_PPP_WITH_PHDR:
 241                         case WTAP_ENCAP_SDLC:
 242                         case WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR:
 243                                 pinfo->p2p_dir = pinfo->pseudo_header->p2p.sent ?
 244                                     P2P_DIR_SENT : P2P_DIR_RECV;
 245                                 break;
 246
 247                         case WTAP_ENCAP_BLUETOOTH_HCI:
 248                                 pinfo->p2p_dir = pinfo->pseudo_header->bthci.sent ?
 249                                         P2P_DIR_SENT : P2P_DIR_RECV;
 250                                 break;
 251
 252                         case WTAP_ENCAP_LAPB:
 253                         case WTAP_ENCAP_FRELAY_WITH_PHDR:
 254                                 pinfo->p2p_dir =
 255                                     (pinfo->pseudo_header->dte_dce.flags & FROM_DCE) ?
 256                                     P2P_DIR_RECV : P2P_DIR_SENT;
 257                                 break;
 258
 259                         case WTAP_ENCAP_ISDN:
 260                         case WTAP_ENCAP_V5_EF:
 261                         case WTAP_ENCAP_DPNSS:
 262                         case WTAP_ENCAP_BACNET_MS_TP_WITH_PHDR:
 263                                 pinfo->p2p_dir = pinfo->pseudo_header->isdn.uton ?
 264                                     P2P_DIR_SENT : P2P_DIR_RECV;
 265                                 break;
 266
 267                         case WTAP_ENCAP_LINUX_LAPD:
 268                                 pinfo->p2p_dir = (pinfo->pseudo_header->lapd.pkttype == 3 ||
 269                                         pinfo->pseudo_header->lapd.pkttype == 4) ?
 270                                         P2P_DIR_SENT : P2P_DIR_RECV;
 271                                 break;
 272
 273                         case WTAP_ENCAP_MTP2_WITH_PHDR:
 274                                 pinfo->p2p_dir = pinfo->pseudo_header->mtp2.sent ?
 275                                     P2P_DIR_SENT : P2P_DIR_RECV;
 276                                 pinfo->link_number  = pinfo->pseudo_header->mtp2.link_number;
 277                                 break;
 278
 279                         case WTAP_ENCAP_GSM_UM:
 280                                 pinfo->p2p_dir = pinfo->pseudo_header->gsm_um.uplink ?
 281                                     P2P_DIR_SENT : P2P_DIR_RECV;
 282                                 break;
 283                         }
 284                 }
 285                 break;
 286
 287         case REC_TYPE_FT_SPECIFIC_EVENT:
 288                 pinfo->current_proto = "Event";
 289                 break;
 290
 291         case REC_TYPE_FT_SPECIFIC_REPORT:
 292                 pinfo->current_proto = "Report";
 293                 break;
 294
 295         case REC_TYPE_SYSCALL:
 296                 pinfo->current_proto = "System Call";
 297                 break;
 298
 299         default:
 300                 g_assert_not_reached();
 301                 break;
 302         }
 303
 304         if (fr_data->pkt_comment) {
 305                 item = proto_tree_add_item(tree, proto_pkt_comment, tvb, 0, 0, ENC_NA);
 306                 comments_tree = proto_item_add_subtree(item, ett_comments);
 307                 comment_item = proto_tree_add_string_format(comments_tree, hf_comments_text, tvb, 0, 0,
 308                                                                            fr_data->pkt_comment, "%s",
 309                                                                            fr_data->pkt_comment);
 310                 expert_add_info_format(pinfo, comment_item, &ei_comments_text,
 311                                                                "%s",  fr_data->pkt_comment);
 312
 313
 314         }
 315
 316         /* if FRAME is not referenced from any filters we don't need to worry about
 317            generating any tree items.  */
 318         if (!proto_field_is_referenced(tree, proto_frame)) {
 319                 tree=NULL;
 320                 if (pinfo->presence_flags & PINFO_HAS_TS) {
 321                         if (pinfo->abs_ts.nsecs < 0 || pinfo->abs_ts.nsecs >= 1000000000)
 322                                 expert_add_info(pinfo, NULL, &ei_arrive_time_out_of_range);
 323                 }
 324         } else {
 325                 /* Put in frame header information. */
 326                 cap_len = tvb_captured_length(tvb);
 327                 frame_len = tvb_reported_length(tvb);
 328
 329                 cap_plurality = plurality(cap_len, "", "s");
 330                 frame_plurality = plurality(frame_len, "", "s");
 331
 332                 switch (pinfo->rec->rec_type) {
 333                 case REC_TYPE_PACKET:
 334                         ti = proto_tree_add_protocol_format(tree, proto_frame, tvb, 0, tvb_captured_length(tvb),
 335                             "Frame %u: %u byte%s on wire",
 336                             pinfo->num, frame_len, frame_plurality);
 337                         if (generate_bits_field)
 338                                 proto_item_append_text(ti, " (%u bits)", frame_len * 8);
 339                         proto_item_append_text(ti, ", %u byte%s captured",
 340                             cap_len, cap_plurality);
 341                         if (generate_bits_field) {
 342                                 proto_item_append_text(ti, " (%u bits)",
 343                                     cap_len * 8);
 344                         }
 345                         if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID) {
 346                                 proto_item_append_text(ti, " on interface %u",
 347                                     pinfo->rec->rec_header.packet_header.interface_id);
 348                         }
 349                         if (pinfo->rec->presence_flags & WTAP_HAS_PACK_FLAGS) {
 350                                 if (pinfo->rec->rec_header.packet_header.pack_flags & 0x00000001)
 351                                         proto_item_append_text(ti, " (inbound)");
 352                                 if (pinfo->rec->rec_header.packet_header.pack_flags & 0x00000002)
 353                                         proto_item_append_text(ti, " (outbound)");
 354                         }
 355                         break;
 356
 357                 case REC_TYPE_FT_SPECIFIC_EVENT:
 358                         ti = proto_tree_add_protocol_format(tree, proto_frame, tvb, 0, tvb_captured_length(tvb),
 359                             "Event %u: %u byte%s on wire",
 360                             pinfo->num, frame_len, frame_plurality);
 361                         if (generate_bits_field)
 362                                 proto_item_append_text(ti, " (%u bits)", frame_len * 8);
 363                         proto_item_append_text(ti, ", %u byte%s captured",
 364                         cap_len, cap_plurality);
 365                         if (generate_bits_field) {
 366                                 proto_item_append_text(ti, " (%u bits)",
 367                                 cap_len * 8);
 368                         }
 369                         break;
 370
 371                 case REC_TYPE_FT_SPECIFIC_REPORT:
 372                         ti = proto_tree_add_protocol_format(tree, proto_frame, tvb, 0, tvb_captured_length(tvb),
 373                             "Report %u: %u byte%s on wire",
 374                             pinfo->num, frame_len, frame_plurality);
 375                         if (generate_bits_field)
 376                                 proto_item_append_text(ti, " (%u bits)", frame_len * 8);
 377                         proto_item_append_text(ti, ", %u byte%s captured",
 378                         cap_len, cap_plurality);
 379                         if (generate_bits_field) {
 380                                 proto_item_append_text(ti, " (%u bits)",
 381                                 cap_len * 8);
 382                         }
 383                         break;
 384
 385                 case REC_TYPE_SYSCALL:
 386                         /*
 387                          * This gives us a top-of-tree "syscall" protocol
 388                          * with "frame" fields underneath. Should we create
 389                          * corresponding syscall.time, .time_epoch, etc
 390                          * fields and use them instead or would frame.*
 391                          * be preferred?
 392                          */
 393                         ti = proto_tree_add_protocol_format(tree, proto_syscall, tvb, 0, tvb_captured_length(tvb),
 394                             "System Call %u: %u byte%s",
 395                             pinfo->num, frame_len, frame_plurality);
 396                         break;
 397                 }
 398
 399                 fh_tree = proto_item_add_subtree(ti, ett_frame);
 400
 401                 if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID &&
 402                    (proto_field_is_referenced(tree, hf_frame_interface_id) || proto_field_is_referenced(tree, hf_frame_interface_name) || proto_field_is_referenced(tree, hf_frame_interface_description))) {
 403                         const char *interface_name = epan_get_interface_name(pinfo->epan, pinfo->rec->rec_header.packet_header.interface_id);
 404                         const char *interface_description = epan_get_interface_description(pinfo->epan, pinfo->rec->rec_header.packet_header.interface_id);
 405                         proto_tree *if_tree;
 406                         proto_item *if_item;
 407
 408                         if (interface_name) {
 409                                 if_item = proto_tree_add_uint_format_value(fh_tree, hf_frame_interface_id, tvb, 0, 0,
 410                                                                            pinfo->rec->rec_header.packet_header.interface_id, "%u (%s)",
 411                                                                            pinfo->rec->rec_header.packet_header.interface_id, interface_name);
 412                                 if_tree = proto_item_add_subtree(if_item, ett_ifname);
 413                                 proto_tree_add_string(if_tree, hf_frame_interface_name, tvb, 0, 0, interface_name);
 414                         } else {
 415                                 if_item = proto_tree_add_uint(fh_tree, hf_frame_interface_id, tvb, 0, 0, pinfo->rec->rec_header.packet_header.interface_id);
 416                         }
 417
 418                         if (interface_description) {
 419                                 if_tree = proto_item_add_subtree(if_item, ett_ifname);
 420                                 proto_tree_add_string(if_tree, hf_frame_interface_description, tvb, 0, 0, interface_description);
 421                         }
 422                 }
 423
 424                 if (pinfo->rec->presence_flags & WTAP_HAS_PACK_FLAGS) {
 425                         proto_tree *flags_tree;
 426                         proto_item *flags_item;
 427                         static const int * flags[] = {
 428                                 &hf_frame_pack_direction,
 429                                 &hf_frame_pack_reception_type,
 430                                 &hf_frame_pack_fcs_length,
 431                                 &hf_frame_pack_reserved,
 432                                 &hf_frame_pack_crc_error,
 433                                 &hf_frame_pack_wrong_packet_too_long_error,
 434                                 &hf_frame_pack_wrong_packet_too_short_error,
 435                                 &hf_frame_pack_wrong_inter_frame_gap_error,
 436                                 &hf_frame_pack_unaligned_frame_error,
 437                                 &hf_frame_pack_start_frame_delimiter_error,
 438                                 &hf_frame_pack_preamble_error,
 439                                 &hf_frame_pack_symbol_error,
 440                                 NULL
 441                         };
 442
 443                         flags_item = proto_tree_add_uint(fh_tree, hf_frame_pack_flags, tvb, 0, 0, pinfo->rec->rec_header.packet_header.pack_flags);
 444                         flags_tree = proto_item_add_subtree(flags_item, ett_flags);
 445                         proto_tree_add_bitmask_list_value(flags_tree, tvb, 0, 0, flags, pinfo->rec->rec_header.packet_header.pack_flags);
 446                 }
 447
 448                 if (pinfo->rec->rec_type == REC_TYPE_PACKET)
 449                         proto_tree_add_int(fh_tree, hf_frame_wtap_encap, tvb, 0, 0, pinfo->rec->rec_header.packet_header.pkt_encap);
 450
 451                 if (pinfo->presence_flags & PINFO_HAS_TS) {
 452                         proto_tree_add_time(fh_tree, hf_frame_arrival_time, tvb,
 453                                             0, 0, &(pinfo->abs_ts));
 454                         if (pinfo->abs_ts.nsecs < 0 || pinfo->abs_ts.nsecs >= 1000000000) {
 455                                 expert_add_info_format(pinfo, ti, &ei_arrive_time_out_of_range,
 456                                                                   "Arrival Time: Fractional second %09ld is invalid,"
 457                                                                   " the valid range is 0-1000000000",
 458                                                                   (long) pinfo->abs_ts.nsecs);
 459                         }
 460                         item = proto_tree_add_time(fh_tree, hf_frame_shift_offset, tvb,
 461                                             0, 0, &(pinfo->fd->shift_offset));
 462                         PROTO_ITEM_SET_GENERATED(item);
 463
 464                         if (generate_epoch_time) {
 465                                 proto_tree_add_time(fh_tree, hf_frame_arrival_time_epoch, tvb,
 466                                                     0, 0, &(pinfo->abs_ts));
 467                         }
 468
 469                         if (proto_field_is_referenced(tree, hf_frame_time_delta)) {
 470                                 nstime_t     del_cap_ts;
 471
 472                                 frame_delta_abs_time(pinfo->epan, pinfo->fd, pinfo->num - 1, &del_cap_ts);
 473
 474                                 item = proto_tree_add_time(fh_tree, hf_frame_time_delta, tvb,
 475                                                            0, 0, &(del_cap_ts));
 476                                 PROTO_ITEM_SET_GENERATED(item);
 477                         }
 478
 479                         if (proto_field_is_referenced(tree, hf_frame_time_delta_displayed)) {
 480                                 nstime_t del_dis_ts;
 481
 482                                 frame_delta_abs_time(pinfo->epan, pinfo->fd, pinfo->fd->prev_dis_num, &del_dis_ts);
 483
 484                                 item = proto_tree_add_time(fh_tree, hf_frame_time_delta_displayed, tvb,
 485                                                            0, 0, &(del_dis_ts));
 486                                 PROTO_ITEM_SET_GENERATED(item);
 487                         }
 488
 489                         item = proto_tree_add_time(fh_tree, hf_frame_time_relative, tvb,
 490                                                    0, 0, &(pinfo->rel_ts));
 491                         PROTO_ITEM_SET_GENERATED(item);
 492
 493                         if (pinfo->fd->flags.ref_time) {
 494                                 ti = proto_tree_add_item(fh_tree, hf_frame_time_reference, tvb, 0, 0, ENC_NA);
 495                                 PROTO_ITEM_SET_GENERATED(ti);
 496                         }
 497                 }
 498
 499                 proto_tree_add_uint(fh_tree, hf_frame_number, tvb,
 500                                     0, 0, pinfo->num);
 501
 502                 proto_tree_add_uint_format(fh_tree, hf_frame_len, tvb,
 503                                            0, 0, frame_len, "Frame Length: %u byte%s (%u bits)",
 504                                            frame_len, frame_plurality, frame_len * 8);
 505
 506                 proto_tree_add_uint_format(fh_tree, hf_frame_capture_len, tvb,
 507                                            0, 0, cap_len, "Capture Length: %u byte%s (%u bits)",
 508                                            cap_len, cap_plurality, cap_len * 8);
 509
 510                 if (generate_md5_hash) {
 511                         const guint8 *cp;
 512                         guint8        digest[HASH_MD5_LENGTH];
 513                         const gchar  *digest_string;
 514
 515                         cp = tvb_get_ptr(tvb, 0, cap_len);
 516
 517                         gcry_md_hash_buffer(GCRY_MD_MD5, digest, cp, cap_len);
 518                         digest_string = bytestring_to_str(wmem_packet_scope(), digest, HASH_MD5_LENGTH, '\0');
 519                         ti = proto_tree_add_string(fh_tree, hf_frame_md5_hash, tvb, 0, 0, digest_string);
 520                         PROTO_ITEM_SET_GENERATED(ti);
 521                 }
 522
 523                 ti = proto_tree_add_boolean(fh_tree, hf_frame_marked, tvb, 0, 0,pinfo->fd->flags.marked);
 524                 PROTO_ITEM_SET_GENERATED(ti);
 525
 526                 ti = proto_tree_add_boolean(fh_tree, hf_frame_ignored, tvb, 0, 0,pinfo->fd->flags.ignored);
 527                 PROTO_ITEM_SET_GENERATED(ti);
 528
 529                 if (pinfo->rec->rec_type == REC_TYPE_PACKET) {
 530                         /* Check for existences of P2P pseudo header */
 531                         if (pinfo->p2p_dir != P2P_DIR_UNKNOWN) {
 532                                 proto_tree_add_int(fh_tree, hf_frame_p2p_dir, tvb,
 533                                                    0, 0, pinfo->p2p_dir);
 534                         }
 535
 536                         /* Check for existences of MTP2 link number */
 537                         if ((pinfo->pseudo_header != NULL) &&
 538                             (pinfo->rec->rec_header.packet_header.pkt_encap == WTAP_ENCAP_MTP2_WITH_PHDR)) {
 539                                 proto_tree_add_uint(fh_tree, hf_link_number, tvb,
 540                                                     0, 0, pinfo->link_number);
 541                         }
 542                 }
 543
 544                 if (show_file_off) {
 545                         proto_tree_add_int64_format_value(fh_tree, hf_frame_file_off, tvb,
 546                                                     0, 0, pinfo->fd->file_off,
 547                                                     "%" G_GINT64_MODIFIER "d (0x%" G_GINT64_MODIFIER "x)",
 548                                                     pinfo->fd->file_off, pinfo->fd->file_off);
 549                 }
 550         }
 551
 552         if (pinfo->fd->flags.ignored) {
 553                 /* Ignored package, stop handling here */
 554                 col_set_str(pinfo->cinfo, COL_INFO, "<Ignored>");
 555                 proto_tree_add_boolean_format(tree, hf_frame_ignored, tvb, 0, 0, TRUE, "This frame is marked as ignored");
 556                 return tvb_captured_length(tvb);
 557         }
 558
 559         /* Portable Exception Handling to trap Wireshark specific exceptions like BoundsError exceptions */
 560         TRY {
 561 #ifdef _MSC_VER
 562                 /* Win32: Visual-C Structured Exception Handling (SEH) to trap hardware exceptions
 563                    like memory access violations.
 564                    (a running debugger will be called before the except part below) */
 565                 /* Note: A Windows "exceptional exception" may leave the kazlib's (Portable Exception Handling)
 566                    stack in an inconsistent state thus causing a crash at some point in the
 567                    handling of the exception.
 568                    See: https://www.wireshark.org/lists/wireshark-dev/200704/msg00243.html
 569                 */
 570                 __try {
 571 #endif
 572                         switch (pinfo->rec->rec_type) {
 573
 574                         case REC_TYPE_PACKET:
 575                                 if ((force_docsis_encap) && (docsis_handle)) {
 576                                         call_dissector_with_data(docsis_handle,
 577                                             tvb, pinfo, parent_tree,
 578                                             (void *)pinfo->pseudo_header);
 579                                 } else {
 580                                         if (!dissector_try_uint_new(wtap_encap_dissector_table,
 581                                             pinfo->rec->rec_header.packet_header.pkt_encap, tvb, pinfo,
 582                                             parent_tree, TRUE,
 583                                             (void *)pinfo->pseudo_header)) {
 584                                                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "UNKNOWN");
 585                                                 col_add_fstr(pinfo->cinfo, COL_INFO, "WTAP_ENCAP = %d",
 586                                                              pinfo->rec->rec_header.packet_header.pkt_encap);
 587                                                 call_data_dissector(tvb, pinfo, parent_tree);
 588                                         }
 589                                 }
 590                                 break;
 591
 592                         case REC_TYPE_FT_SPECIFIC_EVENT:
 593                         case REC_TYPE_FT_SPECIFIC_REPORT:
 594                                 {
 595                                         int file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_UNKNOWN;
 596
 597                                         file_type_subtype = fr_data->file_type_subtype;
 598
 599                                         if (!dissector_try_uint(wtap_fts_rec_dissector_table, file_type_subtype,
 600                                             tvb, pinfo, parent_tree)) {
 601                                                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "UNKNOWN");
 602                                                 col_add_fstr(pinfo->cinfo, COL_INFO, "WTAP FT ST = %d",
 603                                                              file_type_subtype);
 604                                                 call_data_dissector(tvb, pinfo, parent_tree);
 605                                         }
 606                                 }
 607                                 break;
 608
 609                         case REC_TYPE_SYSCALL:
 610                                 /* Sysdig is the only type we currently handle. */
 611                                 if (sysdig_handle) {
 612                                         call_dissector_with_data(sysdig_handle,
 613                                             tvb, pinfo, parent_tree,
 614                                             (void *)pinfo->pseudo_header);
 615                                 }
 616                                 break;
 617                         }
 618 #ifdef _MSC_VER
 619                 } __except(EXCEPTION_EXECUTE_HANDLER /* handle all exceptions */) {
 620                         switch (GetExceptionCode()) {
 621                         case(STATUS_ACCESS_VIOLATION):
 622                                 show_exception(tvb, pinfo, parent_tree, DissectorError,
 623                                                "STATUS_ACCESS_VIOLATION: dissector accessed an invalid memory address");
 624                                 break;
 625                         case(STATUS_INTEGER_DIVIDE_BY_ZERO):
 626                                 show_exception(tvb, pinfo, parent_tree, DissectorError,
 627                                                "STATUS_INTEGER_DIVIDE_BY_ZERO: dissector tried an integer division by zero");
 628                                 break;
 629                         case(STATUS_STACK_OVERFLOW):
 630                                 show_exception(tvb, pinfo, parent_tree, DissectorError,
 631                                                "STATUS_STACK_OVERFLOW: dissector overflowed the stack (e.g. endless loop)");
 632                                 /* XXX - this will have probably corrupted the stack,
 633                                    which makes problems later in the exception code */
 634                                 break;
 635                                 /* XXX - add other hardware exception codes as required */
 636                         default:
 637                                 show_exception(tvb, pinfo, parent_tree, DissectorError,
 638                                                g_strdup_printf("dissector caused an unknown exception: 0x%x", GetExceptionCode()));
 639                         }
 640                 }
 641 #endif
 642         }
 643         CATCH_BOUNDS_AND_DISSECTOR_ERRORS {
 644                 show_exception(tvb, pinfo, parent_tree, EXCEPT_CODE, GET_MESSAGE);
 645         }
 646         ENDTRY;
 647
 648         if (proto_field_is_referenced(tree, hf_frame_protocols)) {
 649                 wmem_strbuf_t *val = wmem_strbuf_sized_new(wmem_packet_scope(), 128, 0);
 650                 wmem_list_frame_t *frame;
 651                 /* skip the first entry, it's always the "frame" protocol */
 652                 frame = wmem_list_frame_next(wmem_list_head(pinfo->layers));
 653                 if (frame) {
 654                         wmem_strbuf_append(val, proto_get_protocol_filter_name(GPOINTER_TO_UINT(wmem_list_frame_data(frame))));
 655                         frame = wmem_list_frame_next(frame);
 656                 }
 657                 while (frame) {
 658                         wmem_strbuf_append_c(val, ':');
 659                         wmem_strbuf_append(val, proto_get_protocol_filter_name(GPOINTER_TO_UINT(wmem_list_frame_data(frame))));
 660                         frame = wmem_list_frame_next(frame);
 661                 }
 662                 ti = proto_tree_add_string(fh_tree, hf_frame_protocols, tvb, 0, 0, wmem_strbuf_get_str(val));
 663                 PROTO_ITEM_SET_GENERATED(ti);
 664         }
 665
 666         /*  Call postdissectors if we have any (while trying to avoid another
 667          *  TRY/CATCH)
 668          */
 669         if (have_postdissector()) {
 670                 TRY {
 671 #ifdef _MSC_VER
 672                         /* Win32: Visual-C Structured Exception Handling (SEH)
 673                            to trap hardware exceptions like memory access violations */
 674                         /* (a running debugger will be called before the except part below) */
 675                         /* Note: A Windows "exceptional exception" may leave the kazlib's (Portable Exception Handling)
 676                            stack in an inconsistent state thus causing a crash at some point in the
 677                            handling of the exception.
 678                            See: https://www.wireshark.org/lists/wireshark-dev/200704/msg00243.html
 679                         */
 680                         __try {
 681 #endif
 682                                 call_all_postdissectors(tvb, pinfo, parent_tree);
 683 #ifdef _MSC_VER
 684                         } __except(EXCEPTION_EXECUTE_HANDLER /* handle all exceptions */) {
 685                                 switch (GetExceptionCode()) {
 686                                 case(STATUS_ACCESS_VIOLATION):
 687                                         show_exception(tvb, pinfo, parent_tree, DissectorError,
 688                                                        "STATUS_ACCESS_VIOLATION: dissector accessed an invalid memory address");
 689                                         break;
 690                                 case(STATUS_INTEGER_DIVIDE_BY_ZERO):
 691                                         show_exception(tvb, pinfo, parent_tree, DissectorError,
 692                                                        "STATUS_INTEGER_DIVIDE_BY_ZERO: dissector tried an integer division by zero");
 693                                         break;
 694                                 case(STATUS_STACK_OVERFLOW):
 695                                         show_exception(tvb, pinfo, parent_tree, DissectorError,
 696                                                        "STATUS_STACK_OVERFLOW: dissector overflowed the stack (e.g. endless loop)");
 697                                         /* XXX - this will have probably corrupted the stack,
 698                                            which makes problems later in the exception code */
 699                                         break;
 700                                         /* XXX - add other hardware exception codes as required */
 701                                 default:
 702                                         show_exception(tvb, pinfo, parent_tree, DissectorError,
 703                                                        g_strdup_printf("dissector caused an unknown exception: 0x%x", GetExceptionCode()));
 704                                 }
 705                         }
 706 #endif
 707                 }
 708                 CATCH_BOUNDS_AND_DISSECTOR_ERRORS {
 709                         show_exception(tvb, pinfo, parent_tree, EXCEPT_CODE, GET_MESSAGE);
 710                 }
 711                 ENDTRY;
 712         }
 713
 714         /* Attempt to (re-)calculate color filters (if any). */
 715         if (pinfo->fd->flags.need_colorize) {
 716                 color_filter = color_filters_colorize_packet(fr_data->color_edt);
 717                 pinfo->fd->color_filter = color_filter;
 718                 pinfo->fd->flags.need_colorize = 0;
 719         } else {
 720                 color_filter = pinfo->fd->color_filter;
 721         }
 722         if (color_filter) {
 723                 item = proto_tree_add_string(fh_tree, hf_frame_color_filter_name, tvb,
 724                                              0, 0, color_filter->filter_name);
 725                 PROTO_ITEM_SET_GENERATED(item);
 726                 item = proto_tree_add_string(fh_tree, hf_frame_color_filter_text, tvb,
 727                                              0, 0, color_filter->filter_text);
 728                 PROTO_ITEM_SET_GENERATED(item);
 729         }
 730
 731         tap_queue_packet(frame_tap, pinfo, NULL);
 732
 733
 734         if (pinfo->frame_end_routines) {
 735                 g_slist_free_full(pinfo->frame_end_routines, &call_frame_end_routine);
 736                 pinfo->frame_end_routines = NULL;
 737         }
 738
 739         if (prefs.enable_incomplete_dissectors_check && tree && tree->tree_data->visible) {
 740                 gchar* decoded;
 741                 guint length;
 742                 guint i;
 743                 guint byte;
 744                 guint bit;
 745
 746                 length = tvb_captured_length(tvb);
 747                 decoded = proto_find_undecoded_data(tree, length);
 748
 749                 for (i = 0; i < length; i++) {
 750                         byte = i / 8;
 751                         bit = i % 8;
 752                         if (!(decoded[byte] & (1 << bit))) {
 753                                 field_info* fi = proto_find_field_from_offset(tree, i, tvb);
 754                                 if (fi && fi->hfinfo->id != proto_frame) {
 755                                         if (prefs.incomplete_dissectors_check_debug)
 756                                                 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_WARNING,
 757                                                         "Dissector %s incomplete in frame %u: undecoded byte number %u "
 758                                                         "(0x%.4X+%u)",
 759                                                         (fi ? fi->hfinfo->abbrev : "[unknown]"),
 760                                                         pinfo->num, i, i - i % 16, i % 16);
 761                                         proto_tree_add_expert_format(tree, pinfo, &ei_incomplete, tvb, i, 1, "Undecoded byte number: %u (0x%.4X+%u)", i, i - i % 16, i % 16);
 762                                 }
 763                         }
 764                 }
 765         }
 766
 767         return tvb_captured_length(tvb);
 768 }
 769
 770 void
 771 proto_register_frame(void)
 772 {
 773         static hf_register_info hf[] = {
 774                 { &hf_frame_arrival_time,
 775                   { "Arrival Time", "frame.time",
 776                     FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x0,
 777                     "Absolute time when this frame was captured", HFILL }},
 778
 779                 { &hf_frame_shift_offset,
 780                   { "Time shift for this packet", "frame.offset_shift",
 781                     FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
 782                     "Time shift applied to this packet", HFILL }},
 783
 784                 { &hf_frame_arrival_time_epoch,
 785                   { "Epoch Time", "frame.time_epoch",
 786                     FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
 787                     "Epoch time when this frame was captured", HFILL }},
 788
 789                 { &hf_frame_time_delta,
 790                   { "Time delta from previous captured frame", "frame.time_delta",
 791                     FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
 792                     NULL, HFILL }},
 793
 794                 { &hf_frame_time_delta_displayed,
 795                   { "Time delta from previous displayed frame", "frame.time_delta_displayed",
 796                     FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
 797                     NULL, HFILL }},
 798
 799                 { &hf_frame_time_relative,
 800                   { "Time since reference or first frame", "frame.time_relative",
 801                     FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
 802                     "Time relative to time reference or first frame", HFILL }},
 803
 804                 { &hf_frame_time_reference,
 805                   { "This is a Time Reference frame", "frame.ref_time",
 806                     FT_NONE, BASE_NONE, NULL, 0x0,
 807                     "This frame is a Time Reference frame", HFILL }},
 808
 809                 { &hf_frame_number,
 810                   { "Frame Number", "frame.number",
 811                     FT_UINT32, BASE_DEC, NULL, 0x0,
 812                     NULL, HFILL }},
 813
 814                 { &hf_frame_len,
 815                   { "Frame length on the wire", "frame.len",
 816                     FT_UINT32, BASE_DEC, NULL, 0x0,
 817                     NULL, HFILL }},
 818
 819                 { &hf_frame_capture_len,
 820                   { "Frame length stored into the capture file", "frame.cap_len",
 821                     FT_UINT32, BASE_DEC, NULL, 0x0,
 822                     NULL, HFILL }},
 823
 824                 { &hf_frame_md5_hash,
 825                   { "Frame MD5 Hash", "frame.md5_hash",
 826                     FT_STRING, BASE_NONE, NULL, 0x0,
 827                     NULL, HFILL }},
 828
 829                 { &hf_frame_p2p_dir,
 830                   { "Point-to-Point Direction", "frame.p2p_dir",
 831                     FT_INT8, BASE_DEC, VALS(p2p_dirs), 0x0,
 832                     NULL, HFILL }},
 833
 834                 { &hf_link_number,
 835                   { "Link Number", "frame.link_nr",
 836                     FT_UINT16, BASE_DEC, NULL, 0x0,
 837                     NULL, HFILL }},
 838
 839                 { &hf_frame_file_off,
 840                   { "File Offset", "frame.file_off",
 841                     FT_INT64, BASE_DEC, NULL, 0x0,
 842                     NULL, HFILL }},
 843
 844                 { &hf_frame_marked,
 845                   { "Frame is marked", "frame.marked",
 846                     FT_BOOLEAN, BASE_NONE, NULL, 0x0,
 847                     "Frame is marked in the GUI", HFILL }},
 848
 849                 { &hf_frame_ignored,
 850                   { "Frame is ignored", "frame.ignored",
 851                     FT_BOOLEAN, BASE_NONE, NULL, 0x0,
 852                     "Frame is ignored by the dissectors", HFILL }},
 853
 854                 { &hf_frame_protocols,
 855                   { "Protocols in frame", "frame.protocols",
 856                     FT_STRING, BASE_NONE, NULL, 0x0,
 857                     "Protocols carried by this frame", HFILL }},
 858
 859                 { &hf_frame_color_filter_name,
 860                   { "Coloring Rule Name", "frame.coloring_rule.name",
 861                     FT_STRING, BASE_NONE, NULL, 0x0,
 862                     "The frame matched the coloring rule with this name", HFILL }},
 863
 864                 { &hf_frame_color_filter_text,
 865                   { "Coloring Rule String", "frame.coloring_rule.string",
 866                     FT_STRING, BASE_NONE, NULL, 0x0,
 867                     "The frame matched this coloring rule string", HFILL }},
 868
 869                 { &hf_frame_interface_id,
 870                   { "Interface id", "frame.interface_id",
 871                     FT_UINT32, BASE_DEC, NULL, 0x0,
 872                     NULL, HFILL }},
 873
 874                 { &hf_frame_interface_name,
 875                   { "Interface name", "frame.interface_name",
 876                     FT_STRING, BASE_NONE, NULL, 0x0,
 877                     "The friendly name for this interface", HFILL }},
 878
 879                 { &hf_frame_interface_description,
 880                   { "Interface description", "frame.interface_description",
 881                     FT_STRING, BASE_NONE, NULL, 0x0,
 882                     "The descriptionfor this interface", HFILL }},
 883
 884                 { &hf_frame_pack_flags,
 885                   { "Packet flags", "frame.packet_flags",
 886                     FT_UINT32, BASE_HEX, NULL, 0x0,
 887                     NULL, HFILL }},
 888
 889                 { &hf_frame_pack_direction,
 890                   { "Direction", "frame.packet_flags_direction",
 891                     FT_UINT32, BASE_HEX, VALS(packet_word_directions), PACKET_WORD_DIRECTION_MASK,
 892                     NULL, HFILL }},
 893
 894                 { &hf_frame_pack_reception_type,
 895                   { "Reception type", "frame.packet_flags_reception_type",
 896                     FT_UINT32, BASE_DEC, VALS(packet_word_reception_types), PACKET_WORD_RECEPTION_TYPE_MASK,
 897                     NULL, HFILL }},
 898
 899                 { &hf_frame_pack_fcs_length,
 900                   { "FCS length", "frame.packet_flags_fcs_length",
 901                     FT_UINT32, BASE_DEC, NULL, PACKET_WORD_FCS_LENGTH_MASK,
 902                     NULL, HFILL }},
 903
 904                 { &hf_frame_pack_reserved,
 905                   { "Reserved", "frame.packet_flags_reserved",
 906                     FT_UINT32, BASE_DEC, NULL, PACKET_WORD_RESERVED_MASK,
 907                     NULL, HFILL }},
 908
 909                 { &hf_frame_pack_crc_error,
 910                   { "CRC error", "frame.packet_flags_crc_error",
 911                     FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_CRC_ERR_MASK,
 912                     NULL, HFILL }},
 913
 914                 { &hf_frame_pack_wrong_packet_too_long_error,
 915                   { "Packet too long error", "frame.packet_flags_packet_too_error",
 916                     FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_PACKET_TOO_LONG_ERR_MASK,
 917                     NULL, HFILL }},
 918
 919                 { &hf_frame_pack_wrong_packet_too_short_error,
 920                   { "Packet too short error", "frame.packet_flags_packet_too_short_error",
 921                     FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_PACKET_TOO_SHORT_ERR_MASK,
 922                     NULL, HFILL }},
 923
 924                 { &hf_frame_pack_wrong_inter_frame_gap_error,
 925                   { "Wrong interframe gap error", "frame.packet_flags_wrong_inter_frame_gap_error",
 926                     FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_WRONG_INTER_FRAME_GAP_ERR_MASK,
 927                     NULL, HFILL }},
 928
 929                 { &hf_frame_pack_unaligned_frame_error,
 930                   { "Unaligned frame error", "frame.packet_flags_unaligned_frame_error",
 931                     FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_UNALIGNED_FRAME_ERR_MASK,
 932                     NULL, HFILL }},
 933
 934                 { &hf_frame_pack_start_frame_delimiter_error,
 935                   { "Start frame delimiter error", "frame.packet_flags_start_frame_delimiter_error",
 936                     FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_START_FRAME_DELIMITER_ERR_MASK,
 937                     NULL, HFILL }},
 938
 939                 { &hf_frame_pack_preamble_error,
 940                   { "Preamble error", "frame.packet_flags_preamble_error",
 941                     FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_PREAMBLE_ERR_MASK,
 942                     NULL, HFILL }},
 943
 944                 { &hf_frame_pack_symbol_error,
 945                   { "Symbol error", "frame.packet_flags_symbol_error",
 946                     FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_SYMBOL_ERR_MASK,
 947                     NULL, HFILL }},
 948
 949                 { &hf_comments_text,
 950                   { "Comment", "frame.comment",
 951                     FT_STRING, BASE_NONE, NULL, 0x0,
 952                     NULL, HFILL }},
 953         };
 954
 955         static hf_register_info hf_encap =
 956                 { &hf_frame_wtap_encap,
 957                   { "Encapsulation type", "frame.encap_type",
 958                     FT_INT16, BASE_DEC, NULL, 0x0,
 959                     NULL, HFILL }};
 960
 961         static gint *ett[] = {
 962                 &ett_frame,
 963                 &ett_ifname,
 964                 &ett_flags,
 965                 &ett_comments
 966         };
 967
 968         static ei_register_info ei[] = {
 969                 { &ei_comments_text, { "frame.comment.expert", PI_COMMENTS_GROUP, PI_COMMENT, "Formatted comment", EXPFILL }},
 970                 { &ei_arrive_time_out_of_range, { "frame.time_invalid", PI_SEQUENCE, PI_NOTE, "Arrival Time: Fractional second out of range (0-1000000000)", EXPFILL }},
 971                 { &ei_incomplete, { "frame.incomplete", PI_UNDECODED, PI_NOTE, "Incomplete dissector", EXPFILL }}
 972         };
 973
 974         module_t *frame_module;
 975         expert_module_t* expert_frame;
 976
 977         if (hf_encap.hfinfo.strings == NULL) {
 978                 int encap_count = wtap_get_num_encap_types();
 979                 value_string *arr;
 980                 int i;
 981
 982                 hf_encap.hfinfo.strings = arr = wmem_alloc_array(wmem_epan_scope(), value_string, encap_count+1);
 983
 984                 for (i = 0; i < encap_count; i++) {
 985                         arr[i].value = i;
 986                         arr[i].strptr = wtap_encap_string(i);
 987                 }
 988                 arr[encap_count].value = 0;
 989                 arr[encap_count].strptr = NULL;
 990         }
 991
 992         proto_frame = proto_register_protocol("Frame", "Frame", "frame");
 993         proto_pkt_comment = proto_register_protocol_in_name_only("Packet comments", "Pkt_Comment", "pkt_comment", proto_frame, FT_PROTOCOL);
 994         proto_syscall = proto_register_protocol("System Call", "Syscall", "syscall");
 995
 996         proto_register_field_array(proto_frame, hf, array_length(hf));
 997         proto_register_field_array(proto_frame, &hf_encap, 1);
 998         proto_register_subtree_array(ett, array_length(ett));
 999         expert_frame = expert_register_protocol(proto_frame);
1000         expert_register_field_array(expert_frame, ei, array_length(ei));
1001         register_dissector("frame",dissect_frame,proto_frame);
1002
1003         wtap_encap_dissector_table = register_dissector_table("wtap_encap",
1004             "Wiretap encapsulation type", proto_frame, FT_UINT32, BASE_DEC);
1005         wtap_fts_rec_dissector_table = register_dissector_table("wtap_fts_rec",
1006             "Wiretap file type for file-type-specific records", proto_frame, FT_UINT32, BASE_DEC);
1007         register_capture_dissector_table("wtap_encap", "Wiretap encapsulation type");
1008
1009         /* You can't disable dissection of "Frame", as that would be
1010            tantamount to not doing any dissection whatsoever. */
1011         proto_set_cant_toggle(proto_frame);
1012
1013         register_seq_analysis("any", "All Flows", proto_frame, NULL, TL_REQUIRES_COLUMNS, frame_seq_analysis_packet);
1014
1015         /* Our preferences */
1016         frame_module = prefs_register_protocol(proto_frame, NULL);
1017         prefs_register_bool_preference(frame_module, "show_file_off",
1018             "Show File Offset", "Show offset of frame in capture file", &show_file_off);
1019         prefs_register_bool_preference(frame_module, "force_docsis_encap",
1020             "Treat all frames as DOCSIS frames", "Treat all frames as DOCSIS Frames", &force_docsis_encap);
1021         prefs_register_bool_preference(frame_module, "generate_md5_hash",
1022             "Generate an MD5 hash of each frame",
1023             "Whether or not MD5 hashes should be generated for each frame, useful for finding duplicate frames.",
1024             &generate_md5_hash);
1025         prefs_register_bool_preference(frame_module, "generate_epoch_time",
1026             "Generate an epoch time entry for each frame",
1027             "Whether or not an Epoch time entry should be generated for each frame.",
1028             &generate_epoch_time);
1029         prefs_register_bool_preference(frame_module, "generate_bits_field",
1030             "Show the number of bits in the frame",
1031             "Whether or not the number of bits in the frame should be shown.",
1032             &generate_bits_field);
1033         prefs_register_bool_preference(frame_module, "disable_packet_size_limited_in_summary",
1034             "Disable 'packet size limited during capture' message in summary",
1035             "Whether or not 'packet size limited during capture' message in shown in Info column.",
1036             &disable_packet_size_limited_in_summary);
1037
1038         frame_tap=register_tap("frame");
1039 }
1040
1041 void
1042 proto_reg_handoff_frame(void)
1043 {
1044         docsis_handle = find_dissector_add_dependency("docsis", proto_frame);
1045         sysdig_handle = find_dissector_add_dependency("sysdig", proto_frame);
1046 }
1047
1048 /*
1049  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
1050  *
1051  * Local variables:
1052  * c-basic-offset: 8
1053  * tab-width: 8
1054  * indent-tabs-mode: t
1055  * End:
1056  *
1057  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
1058  * :indentSize=8:tabSize=8:noTabs=false:
1059  */