/* file-pcapng.c * Routines for PCAPNG File Format * https://github.com/pcapng/pcapng * * Copyright 2015, Michal Labedzki for Tieto Corporation * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "config.h" #include #include #include #include #include #include #include #include static int proto_pcapng = -1; static dissector_handle_t pcap_pktdata_handle; static int hf_pcapng_block = -1; static int hf_pcapng_block_type = -1; static int hf_pcapng_block_type_vendor = -1; static int hf_pcapng_block_type_value = -1; static int hf_pcapng_block_length = -1; static int hf_pcapng_block_data = -1; static int hf_pcapng_section_header_byte_order_magic = -1; static int hf_pcapng_section_header_major_version = -1; static int hf_pcapng_section_header_minor_version = -1; static int hf_pcapng_section_header_section_length = -1; static int hf_pcapng_options = -1; static int hf_pcapng_option = -1; static int hf_pcapng_option_code = -1; static int hf_pcapng_option_code_section_header = -1; static int hf_pcapng_option_code_interface_description = -1; static int hf_pcapng_option_code_enhanced_packet = -1; static int hf_pcapng_option_code_packet = -1; static int hf_pcapng_option_code_interface_statistics = -1; static int hf_pcapng_option_code_name_resolution = -1; static int hf_pcapng_option_length = -1; static int hf_pcapng_option_data = -1; static int hf_pcapng_option_data_comment = -1; static int hf_pcapng_option_data_section_header_hardware = -1; static int hf_pcapng_option_data_section_header_os = -1; static int hf_pcapng_option_data_section_header_user_application = -1; static int hf_pcapng_option_data_interface_description_name = -1; static int hf_pcapng_option_data_interface_description_description = -1; static int hf_pcapng_option_data_ipv4 = -1; static int hf_pcapng_option_data_ipv4_mask = -1; static int hf_pcapng_option_data_ipv6 = -1; static int hf_pcapng_option_data_ipv6_mask = -1; static int hf_pcapng_option_data_mac_address = -1; static int hf_pcapng_option_data_eui_address = -1; static int hf_pcapng_option_data_interface_speed = -1; static int hf_pcapng_option_data_interface_timestamp_resolution = -1; static int hf_pcapng_option_data_interface_timestamp_resolution_base = -1; static int hf_pcapng_option_data_interface_timestamp_resolution_value = -1; static int hf_pcapng_option_data_interface_timezone = -1; static int hf_pcapng_option_data_interface_filter = -1; static int hf_pcapng_option_data_interface_os = -1; static int hf_pcapng_option_data_interface_fcs_length = -1; static int hf_pcapng_option_data_interface_timestamp_offset = -1; static int hf_pcapng_option_data_packet_drop_count = -1; static int hf_pcapng_option_data_packet_hash_algorithm = -1; static int hf_pcapng_option_data_packet_hash_data = -1; static int hf_pcapng_option_data_packet_flags = -1; static int hf_pcapng_option_data_packet_flags_link_layer_errors = -1; static int hf_pcapng_option_data_packet_flags_link_layer_errors_symbol = -1; static int hf_pcapng_option_data_packet_flags_link_layer_errors_preamble = -1; static int hf_pcapng_option_data_packet_flags_link_layer_errors_start_frame_delimiter = -1; static int hf_pcapng_option_data_packet_flags_link_layer_errors_unaligned_frame = -1; static int hf_pcapng_option_data_packet_flags_link_layer_errors_wrong_inter_frame_gap = -1; static int hf_pcapng_option_data_packet_flags_link_layer_errors_packet_too_short = -1; static int hf_pcapng_option_data_packet_flags_link_layer_errors_packet_too_long = -1; static int hf_pcapng_option_data_packet_flags_link_layer_errors_crc_error = -1; static int hf_pcapng_option_data_packet_flags_link_layer_errors_reserved = -1; static int hf_pcapng_option_data_packet_flags_reserved = -1; static int hf_pcapng_option_data_packet_flags_fcs_length = -1; static int hf_pcapng_option_data_packet_flags_reception_type = -1; static int hf_pcapng_option_data_packet_flags_direction = -1; static int hf_pcapng_option_data_dns_name = -1; static int hf_pcapng_option_data_start_time = -1; static int hf_pcapng_option_data_end_time = -1; static int hf_pcapng_option_data_interface_received = -1; static int hf_pcapng_option_data_interface_dropped = -1; static int hf_pcapng_option_data_interface_accepted_by_filter = -1; static int hf_pcapng_option_data_interface_dropped_by_os = -1; static int hf_pcapng_option_data_interface_delivered_to_user = -1; static int hf_pcapng_option_padding = -1; static int hf_pcapng_interface_description_link_type = -1; static int hf_pcapng_interface_description_reserved = -1; static int hf_pcapng_interface_description_snap_length = -1; static int hf_pcapng_packet_block_interface_id = -1; static int hf_pcapng_packet_block_drops_count = -1; static int hf_pcapng_captured_length = -1; static int hf_pcapng_packet_length = -1; static int hf_pcapng_packet_data = -1; static int hf_pcapng_packet_padding = -1; static int hf_pcapng_interface_id = -1; static int hf_pcapng_timestamp_high = -1; static int hf_pcapng_timestamp_low = -1; static int hf_pcapng_timestamp = -1; static int hf_pcapng_records = -1; static int hf_pcapng_record = -1; static int hf_pcapng_record_code = -1; static int hf_pcapng_record_length = -1; static int hf_pcapng_record_data = -1; static int hf_pcapng_record_ipv4 = -1; static int hf_pcapng_record_ipv6 = -1; static int hf_pcapng_record_name = -1; static int hf_pcapng_record_padding = -1; static expert_field ei_invalid_option_length = EI_INIT; static expert_field ei_invalid_record_length = EI_INIT; static gint ett_pcapng = -1; static gint ett_pcapng_section_header_block = -1; static gint ett_pcapng_block_data = -1; static gint ett_pcapng_options = -1; static gint ett_pcapng_option = -1; static gint ett_pcapng_records = -1; static gint ett_pcapng_record = -1; static gint ett_pcapng_packet_data = -1; static const int *hfx_pcapng_option_data_interface_timestamp_resolution[] = { &hf_pcapng_option_data_interface_timestamp_resolution_base, &hf_pcapng_option_data_interface_timestamp_resolution_value, NULL }; static const int *hfx_pcapng_option_data_packet_flags_link_layer_errors[] = { &hf_pcapng_option_data_packet_flags_link_layer_errors_symbol, &hf_pcapng_option_data_packet_flags_link_layer_errors_preamble, &hf_pcapng_option_data_packet_flags_link_layer_errors_start_frame_delimiter, &hf_pcapng_option_data_packet_flags_link_layer_errors_unaligned_frame, &hf_pcapng_option_data_packet_flags_link_layer_errors_wrong_inter_frame_gap, &hf_pcapng_option_data_packet_flags_link_layer_errors_packet_too_short, &hf_pcapng_option_data_packet_flags_link_layer_errors_packet_too_long, &hf_pcapng_option_data_packet_flags_link_layer_errors_crc_error, &hf_pcapng_option_data_packet_flags_link_layer_errors_reserved, NULL }; static const int *hfx_pcapng_option_data_packet_flags[] = { &hf_pcapng_option_data_packet_flags_reserved, &hf_pcapng_option_data_packet_flags_fcs_length, &hf_pcapng_option_data_packet_flags_reception_type, &hf_pcapng_option_data_packet_flags_direction, NULL }; static const int *hfx_pcapng_block_type[] = { &hf_pcapng_block_type_vendor, &hf_pcapng_block_type_value, NULL }; struct info { guint32 file_number; guint32 interface_number; guint32 frame_number; wmem_array_t *interfaces; }; struct interface_description { guint32 link_type; guint8 timestamp_resolution; guint64 timestamp_offset; }; static gboolean pref_dissect_next_layer = FALSE; #define BLOCK_INTERFACE_DESCRIPTION 0x00000001 #define BLOCK_PACKET 0x00000002 #define BLOCK_SIMPLE_PACKET 0x00000003 #define BLOCK_NAME_RESOLUTION 0x00000004 #define BLOCK_INTERFACE_STATISTICS 0x00000005 #define BLOCK_ENHANCED_PACKET 0x00000006 #define BLOCK_IRIG_TIMESTAMP 0x00000007 #define BLOCK_ARINC_429 0x00000008 #define BLOCK_SECTION_HEADER 0x0A0D0D0A static const value_string block_type_vals[] = { { 0x00000001, "Interface Description Block" }, { 0x00000002, "Packet Block" }, { 0x00000003, "Simple Packet Block" }, { 0x00000004, "Name Resolution Block" }, { 0x00000005, "Interface Statistics Block" }, { 0x00000006, "Enhanced Packet Block" }, { 0x00000007, "IRIG Timestamp Block" }, { 0x00000008, "Arinc 429 in AFDX Encapsulation Information Block " }, { 0x0A0D0D0A, "Section Header Block" }, { 0, NULL } }; static const value_string option_code_section_header_vals[] = { { 0x0000, "End of Options" }, { 0x0001, "Comment" }, { 0x0002, "Hardware Description" }, { 0x0003, "OS Description" }, { 0x0004, "User Application" }, { 0, NULL } }; static const value_string option_code_interface_description_vals[] = { { 0x0000, "End of Options" }, { 0x0001, "Comment" }, { 0x0002, "Interface Name" }, { 0x0003, "Interface Description" }, { 0x0004, "IPv4 Address" }, { 0x0005, "IPv6 Address" }, { 0x0006, "MAC Address" }, { 0x0007, "EUI Address" }, { 0x0008, "Speed" }, { 0x0009, "Timestamp Resolution" }, { 0x000A, "Timezone" }, { 0x000B, "Filter" }, { 0x000C, "OS" }, { 0x000D, "FCS Length" }, { 0x000E, "Timestamo Offset" }, { 0, NULL } }; static const value_string option_code_enhanced_packet_vals[] = { { 0x0000, "End of Options" }, { 0x0001, "Comment" }, { 0x0002, "Flags" }, { 0x0003, "Hash" }, { 0x0004, "Drop Count" }, { 0, NULL } }; static const value_string option_code_packet_vals[] = { { 0x0000, "End of Options" }, { 0x0001, "Comment" }, { 0x0002, "Flags" }, { 0x0003, "Hash" }, { 0, NULL } }; static const value_string option_code_name_resolution_vals[] = { { 0x0000, "End of Options" }, { 0x0001, "Comment" }, { 0x0002, "DNS Name" }, { 0x0003, "DNS IPv4 Address" }, { 0x0004, "DNS IPv6 Address" }, { 0, NULL } }; static const value_string option_code_interface_statistics_vals[] = { { 0x0000, "End of Options" }, { 0x0001, "Comment" }, { 0x0002, "Start Time" }, { 0x0003, "End Time" }, { 0x0004, "Number of Rx Packets" }, { 0x0005, "Number of Dropped Packets" }, { 0x0006, "Number of Accepted Packets" }, { 0x0007, "Number of Packets Dropped by OS" }, { 0x0008, "Number of Packets Delivered to the User" }, { 0, NULL } }; static const value_string record_code_vals[] = { { 0x0000, "End of Records" }, { 0x0001, "IPv4 Record" }, { 0x0002, "IPv6 Record" }, { 0, NULL } }; static const value_string timestamp_resolution_base_vals[] = { { 0x0000, "Power of 10" }, { 0x0001, "Power of 2" }, { 0, NULL } }; static const value_string packet_hash_algorithm_vals[] = { { 0x00, "2's complement" }, { 0x01, "XOR" }, { 0x02, "CRC32" }, { 0x03, "MD5" }, { 0x04, "SHA1" }, { 0, NULL } }; static const value_string packet_flags_direction_vals[] = { { 0x00, "Information Not Available" }, { 0x01, "Inbound" }, { 0x02, "Outbound" }, { 0, NULL } }; static const value_string flags_reception_type_vals[] = { { 0x00, "Not Specified" }, { 0x01, "Unicast" }, { 0x02, "Multicast" }, { 0x03, "Broadcast" }, { 0x04, "Promiscuous" }, { 0, NULL } }; void proto_register_pcapng(void); void proto_reg_handoff_pcapng(void); static gint dissect_options(proto_tree *tree, packet_info *pinfo, guint32 block_type, tvbuff_t *tvb, guint encoding, void *user_data) { proto_tree *options_tree; proto_item *options_item; proto_tree *option_tree; proto_item *option_item; proto_item *p_item; gint offset = 0; guint16 option_code; gint option_length; gint hfj_pcapng_option_code; const guint8 *str = NULL; address addr; address addr_mask; const value_string *vals = NULL; union value { guint32 u32; guint64 u64; guint8 u8; } value; if (tvb_reported_length(tvb) <= 0) return 0; options_item = proto_tree_add_item(tree, hf_pcapng_options, tvb, offset, -1, ENC_NA); options_tree = proto_item_add_subtree(options_item, ett_pcapng_options); while (tvb_captured_length_remaining(tvb, offset)) { str = NULL; option_code = tvb_get_guint16(tvb, offset, encoding); option_length = tvb_get_guint16(tvb, offset + 2, encoding); option_item = proto_tree_add_item(options_tree, hf_pcapng_option, tvb, offset, option_length + 2 * 2, ENC_NA); option_tree = proto_item_add_subtree(option_item, ett_pcapng_option); switch (block_type) { case BLOCK_SECTION_HEADER: hfj_pcapng_option_code = hf_pcapng_option_code_section_header; vals = option_code_section_header_vals; break; case BLOCK_INTERFACE_DESCRIPTION: hfj_pcapng_option_code = hf_pcapng_option_code_interface_description; vals = option_code_interface_description_vals; break; case BLOCK_ENHANCED_PACKET: hfj_pcapng_option_code = hf_pcapng_option_code_enhanced_packet; vals = option_code_enhanced_packet_vals; break; case BLOCK_PACKET: hfj_pcapng_option_code = hf_pcapng_option_code_packet; vals = option_code_packet_vals; break; case BLOCK_NAME_RESOLUTION: hfj_pcapng_option_code = hf_pcapng_option_code_name_resolution; vals = option_code_name_resolution_vals; break; case BLOCK_INTERFACE_STATISTICS: hfj_pcapng_option_code = hf_pcapng_option_code_interface_statistics; vals = option_code_interface_statistics_vals; break; default: hfj_pcapng_option_code = hf_pcapng_option_code; } if (vals) proto_item_append_text(option_item, ": %s", val_to_str_const(option_code, vals, "Unknown")); proto_tree_add_item(option_tree, hfj_pcapng_option_code, tvb, offset, 2, encoding); offset += 2; proto_tree_add_item(option_tree, hf_pcapng_option_length, tvb, offset, 2, encoding); offset += 2; if (option_code == 0 && option_length == 0) { break; } else if (option_code == 1) { proto_tree_add_item_ret_string(option_tree, hf_pcapng_option_data_comment, tvb, offset, option_length, ENC_NA | ENC_UTF_8, wmem_packet_scope(), &str); offset += option_length; } else switch (block_type) { case BLOCK_SECTION_HEADER: switch (option_code) { case 0x0002: proto_tree_add_item_ret_string(option_tree, hf_pcapng_option_data_section_header_hardware, tvb, offset, option_length, ENC_NA | ENC_UTF_8, wmem_packet_scope(), &str); offset += option_length; break; case 0x0003: proto_tree_add_item_ret_string(option_tree, hf_pcapng_option_data_section_header_os, tvb, offset, option_length, ENC_NA | ENC_UTF_8, wmem_packet_scope(), &str); offset += option_length; break; case 0x0004: proto_tree_add_item_ret_string(option_tree, hf_pcapng_option_data_section_header_user_application, tvb, offset, option_length, ENC_NA | ENC_UTF_8, wmem_packet_scope(), &str); offset += option_length; break; default: proto_tree_add_item(option_tree, hf_pcapng_option_data, tvb, offset, option_length, ENC_NA); offset += option_length; } break; case BLOCK_INTERFACE_DESCRIPTION: { struct interface_description *interface_description = (struct interface_description *) user_data; switch (option_code) { case 0x0002: proto_tree_add_item_ret_string(option_tree, hf_pcapng_option_data_interface_description_name, tvb, offset, option_length, ENC_NA | ENC_UTF_8, wmem_packet_scope(), &str); offset += option_length; break; case 0x0003: proto_tree_add_item_ret_string(option_tree, hf_pcapng_option_data_interface_description_description, tvb, offset, option_length, ENC_NA | ENC_UTF_8, wmem_packet_scope(), &str); offset += option_length; break; case 0x0004: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_ipv4, tvb, offset, 4, ENC_BIG_ENDIAN); set_address_tvb(&addr, AT_IPv4, 4, tvb, offset); offset += 4; proto_tree_add_item(option_tree, hf_pcapng_option_data_ipv4_mask, tvb, offset, 4, ENC_BIG_ENDIAN); set_address_tvb(&addr_mask, AT_IPv4, 4, tvb, offset); offset += 4; str = wmem_strdup_printf(wmem_packet_scope(), "%s/%s", address_to_display(wmem_packet_scope(), &addr), address_to_display(wmem_packet_scope(), &addr_mask)); break; case 0x0005: if (option_length != 17) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_ipv6, tvb, offset, 16, ENC_NA); set_address_tvb(&addr, AT_IPv6, 16, tvb, offset); offset += 16; proto_tree_add_item(option_tree, hf_pcapng_option_data_ipv6_mask, tvb, offset, 1, ENC_NA); offset += 1; str = wmem_strdup_printf(wmem_packet_scope(), "%s/%u", address_to_display(wmem_packet_scope(), &addr), (unsigned int) tvb_get_guint8(tvb, offset - 1)); break;; case 0x0006: if (option_length != 6) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_mac_address, tvb, offset, 6, encoding); str = tvb_get_ether_name(tvb, offset); offset += 6; break; case 0x0007: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_eui_address, tvb, offset, 8, encoding); set_address_tvb(&addr, AT_EUI64, 8, tvb, offset); offset += 8; str = address_to_display(wmem_packet_scope(), &addr); break; case 0x0008: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } p_item = proto_tree_add_item(option_tree, hf_pcapng_option_data_interface_speed, tvb, offset, 8, encoding); value.u64 = tvb_get_guint64(tvb, offset, encoding); if (value.u64 == 10000000) { str = "10 Mbps"; proto_item_append_text(p_item, "%s", str); } else if (value.u64 == 100000000) { str = "100 Mbps"; proto_item_append_text(p_item, "%s", str); } else if (value.u64 == 1000000000) { str = "1 Gbps"; proto_item_append_text(p_item, "%s", str); } else { str = wmem_strdup_printf(wmem_packet_scope(), "%"G_GUINT64_FORMAT, value.u64); } offset += 8; break; case 0x0009: if (option_length != 1) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_bitmask(option_tree, tvb, offset, hf_pcapng_option_data_interface_timestamp_resolution, ett_pcapng_option, hfx_pcapng_option_data_interface_timestamp_resolution, ENC_NA); value.u8 = tvb_get_guint8(tvb, offset); offset += 1; if (interface_description) { interface_description->timestamp_resolution = value.u8; } str = wmem_strdup_printf(wmem_packet_scope(), "%s^-%u%s", (value.u8 & 0x80) ? "2" : "10", (guint32) (value.u8 & 0x7F), (!(value.u8 & 0x80) && value.u8 == 6) ? " (microseconds)" : ((!(value.u8 & 0x80) && value.u8 == 9) ? " (nanoseconds)" : "")); break; case 0x000A: if (option_length != 4) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } /* TODO: Better timezone decoding */ proto_tree_add_item(option_tree, hf_pcapng_option_data_interface_timezone, tvb, offset, 4, encoding); value.u32 = tvb_get_guint32(tvb, offset, encoding); offset += 4; str = wmem_strdup_printf(wmem_packet_scope(), "%u", value.u32); break; case 0x000B: proto_tree_add_item_ret_string(option_tree, hf_pcapng_option_data_interface_filter, tvb, offset, option_length, ENC_NA | ENC_UTF_8, wmem_packet_scope(), &str); offset += option_length; break; case 0x000C: proto_tree_add_item_ret_string(option_tree, hf_pcapng_option_data_interface_os, tvb, offset, option_length, ENC_NA | ENC_UTF_8, wmem_packet_scope(), &str); offset += option_length; break; case 0x000D: if (option_length != 1) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_interface_fcs_length, tvb, offset, 1, ENC_NA); value.u8 = tvb_get_guint8(tvb, offset); str = wmem_strdup_printf(wmem_packet_scope(), "%u", (guint32) value.u8); offset += 1; break; case 0x000E: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_interface_timestamp_offset, tvb, offset, 8, encoding); value.u64 = tvb_get_guint64(tvb, offset, encoding); str = wmem_strdup_printf(wmem_packet_scope(), "%"G_GUINT64_FORMAT, value.u64); offset += 8; if (interface_description) { interface_description->timestamp_offset = value.u64; } break; default: proto_tree_add_item(option_tree, hf_pcapng_option_data, tvb, offset, option_length, ENC_NA); offset += option_length; } } break; case BLOCK_PACKET: switch (option_code) { case 0x0002: if (option_length != 4) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } if (encoding == ENC_LITTLE_ENDIAN) { proto_tree_add_bitmask(option_tree, tvb, offset, hf_pcapng_option_data_packet_flags, ett_pcapng_option, hfx_pcapng_option_data_packet_flags, encoding); offset += 2; proto_tree_add_bitmask(option_tree, tvb, offset, hf_pcapng_option_data_packet_flags_link_layer_errors, ett_pcapng_option, hfx_pcapng_option_data_packet_flags_link_layer_errors, encoding); offset += 2; } else { proto_tree_add_bitmask(option_tree, tvb, offset, hf_pcapng_option_data_packet_flags_link_layer_errors, ett_pcapng_option, hfx_pcapng_option_data_packet_flags_link_layer_errors, encoding); offset += 2; proto_tree_add_bitmask(option_tree, tvb, offset, hf_pcapng_option_data_packet_flags, ett_pcapng_option, hfx_pcapng_option_data_packet_flags, encoding); offset += 2; } break; case 0x0003: proto_tree_add_item(option_tree, hf_pcapng_option_data_packet_hash_algorithm, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(option_tree, hf_pcapng_option_data_packet_hash_data, tvb, offset, option_length - 1, ENC_NA); offset += option_length - 1; break; default: proto_tree_add_item(option_tree, hf_pcapng_option_data, tvb, offset, option_length, ENC_NA); offset += option_length; } break; case BLOCK_NAME_RESOLUTION: switch (option_code) { case 0x0002: proto_tree_add_item_ret_string(option_tree, hf_pcapng_option_data_dns_name, tvb, offset, option_length, ENC_NA | ENC_UTF_8, wmem_packet_scope(), &str); offset += option_length; break; case 0x0003: if (option_length != 4) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_ipv4, tvb, offset, 4, ENC_BIG_ENDIAN); set_address_tvb(&addr, AT_IPv4, 4, tvb, offset); offset += 4; str = address_to_display(wmem_packet_scope(), &addr); break; case 0x0004: if (option_length != 16) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_ipv6, tvb, offset, 16, ENC_NA); set_address_tvb(&addr, AT_IPv6, 16, tvb, offset); offset += 16; str = address_to_display(wmem_packet_scope(), &addr); break; default: proto_tree_add_item(option_tree, hf_pcapng_option_data, tvb, offset, option_length, ENC_NA); offset += option_length; } break; case BLOCK_INTERFACE_STATISTICS: switch (option_code) { case 0x0002: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_start_time, tvb, offset, 8, encoding); offset += 8; break; case 0x0003: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_end_time, tvb, offset, 8, encoding); offset += 8; break; case 0x0004: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_interface_received, tvb, offset, 8, encoding); value.u64 = tvb_get_guint64(tvb, offset, encoding); str = wmem_strdup_printf(wmem_packet_scope(), "%"G_GUINT64_FORMAT, value.u64); offset += 8; break; case 0x0005: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_interface_dropped, tvb, offset, 8, encoding); value.u64 = tvb_get_guint64(tvb, offset, encoding); str = wmem_strdup_printf(wmem_packet_scope(), "%"G_GUINT64_FORMAT, value.u64); offset += 8; break; case 0x0006: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_interface_accepted_by_filter, tvb, offset, 8, encoding); value.u64 = tvb_get_guint64(tvb, offset, encoding); str = wmem_strdup_printf(wmem_packet_scope(), "%"G_GUINT64_FORMAT, value.u64); offset += 8; break; case 0x0007: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_interface_dropped_by_os, tvb, offset, 8, encoding); value.u64 = tvb_get_guint64(tvb, offset, encoding); str = wmem_strdup_printf(wmem_packet_scope(), "%"G_GUINT64_FORMAT, value.u64); offset += 8; break; case 0x0008: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_interface_delivered_to_user, tvb, offset, 8, encoding); value.u64 = tvb_get_guint64(tvb, offset, encoding); str = wmem_strdup_printf(wmem_packet_scope(), "%"G_GUINT64_FORMAT, value.u64); offset += 8; break; default: proto_tree_add_item(option_tree, hf_pcapng_option_data, tvb, offset, option_length, ENC_NA); offset += option_length; } break; case BLOCK_ENHANCED_PACKET: switch (option_code) { case 0x0002: if (option_length != 4) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } if (encoding == ENC_LITTLE_ENDIAN) { proto_tree_add_bitmask(option_tree, tvb, offset, hf_pcapng_option_data_packet_flags, ett_pcapng_option, hfx_pcapng_option_data_packet_flags, encoding); offset += 2; proto_tree_add_bitmask(option_tree, tvb, offset, hf_pcapng_option_data_packet_flags_link_layer_errors, ett_pcapng_option, hfx_pcapng_option_data_packet_flags_link_layer_errors, encoding); offset += 2; } else { proto_tree_add_bitmask(option_tree, tvb, offset, hf_pcapng_option_data_packet_flags_link_layer_errors, ett_pcapng_option, hfx_pcapng_option_data_packet_flags_link_layer_errors, encoding); offset += 2; proto_tree_add_bitmask(option_tree, tvb, offset, hf_pcapng_option_data_packet_flags, ett_pcapng_option, hfx_pcapng_option_data_packet_flags, encoding); offset += 2; } break; case 0x0003: proto_tree_add_item(option_tree, hf_pcapng_option_data_packet_hash_algorithm, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(option_tree, hf_pcapng_option_data_packet_hash_data, tvb, offset, option_length - 1, ENC_NA); offset += option_length - 1; break; case 0x0004: if (option_length != 8) { proto_tree_add_expert(option_tree, pinfo, &ei_invalid_option_length, tvb, offset, option_length); offset += option_length; break; } proto_tree_add_item(option_tree, hf_pcapng_option_data_packet_drop_count, tvb, offset, 8, encoding); value.u64 = tvb_get_guint64(tvb, offset, encoding); str = wmem_strdup_printf(wmem_packet_scope(), "%"G_GUINT64_FORMAT, value.u64); offset += 8; break; default: proto_tree_add_item(option_tree, hf_pcapng_option_data, tvb, offset, option_length, ENC_NA); offset += option_length; } break; default: proto_tree_add_item(option_tree, hf_pcapng_option_data, tvb, offset, option_length, ENC_NA); offset += option_length; } if (option_length % 4) { proto_item_set_len(option_item, option_length + 2 * 2 + (4 - option_length % 4)); option_length = 4 - option_length % 4; proto_tree_add_item(option_tree, hf_pcapng_option_padding, tvb, offset, option_length, ENC_NA); offset += option_length; } if (str) proto_item_append_text(option_item, " = %s", str); } return offset; } static void pcapng_add_timestamp(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, int offset, guint encoding, guint32 interface_id, struct info *info) { proto_tree_add_item(tree, hf_pcapng_timestamp_high, tvb, offset, 4, encoding); proto_tree_add_item(tree, hf_pcapng_timestamp_low, tvb, offset + 4, 4, encoding); if (interface_id < wmem_array_get_count(info->interfaces)) { struct interface_description *interface_description; nstime_t timestamp; guint64 ts; guint32 base; guint32 i_resolution; guint64 resolution = 1; proto_item *ti; interface_description = (struct interface_description *) wmem_array_index(info->interfaces, interface_id); ts = ((guint64)(tvb_get_guint32(tvb, offset, encoding))) << 32 | tvb_get_guint32(tvb, offset + 4, encoding); ts += interface_description->timestamp_offset; if (interface_description->timestamp_resolution == 0) interface_description->timestamp_resolution = 6; if (interface_description->timestamp_resolution & 0x80) { base = 2; } else { base = 10; } for (i_resolution = 0; i_resolution < (guint32)(interface_description->timestamp_resolution & 0x7F); i_resolution += 1) resolution *= base; timestamp.secs = (time_t)(ts / resolution); timestamp.nsecs = (int)(ts - (ts / resolution) * resolution); ti = proto_tree_add_time(tree, hf_pcapng_timestamp, tvb, offset, 8, ×tamp); PROTO_ITEM_SET_GENERATED(ti); pinfo->abs_ts = timestamp; } } static gint dissect_block(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, guint encoding, struct info *info) { proto_tree *block_tree; proto_item *block_item; proto_tree *block_data_tree; proto_item *block_data_item; proto_item *byte_order_magic_item; proto_item *packet_data_item; gint offset = 0; guint32 length; guint32 captured_length; guint32 reported_length; guint32 block_type; guint32 block_data_length; guint32 interface_id; tvbuff_t *next_tvb; block_type = tvb_get_guint32(tvb, offset + 0, encoding); length = tvb_get_guint32(tvb, offset + 4, encoding); block_item = proto_tree_add_item(tree, hf_pcapng_block, tvb, offset, length, ENC_NA); block_tree = proto_item_add_subtree(block_item, ett_pcapng_section_header_block); proto_item_append_text(block_item, ": %s", val_to_str_const(block_type, block_type_vals, "Unknown")); proto_tree_add_bitmask_with_flags(block_tree, tvb, offset, hf_pcapng_block_type, ett_pcapng_option, hfx_pcapng_block_type, encoding, BMT_NO_APPEND); offset += 4; proto_tree_add_item(block_tree, hf_pcapng_block_length, tvb, offset, 4, encoding); block_data_length = tvb_get_guint32(tvb, offset, encoding) - 3 * 4; offset += 4; block_data_item = proto_tree_add_item(block_tree, hf_pcapng_block_data, tvb, offset, block_data_length, ENC_NA); block_data_tree = proto_item_add_subtree(block_data_item, ett_pcapng_block_data); switch (block_type) { case BLOCK_SECTION_HEADER: /* Section Header Block */ proto_item_append_text(block_item, " %u", info->file_number); info->file_number += 1; info->interface_number = 0; info->frame_number = 1; byte_order_magic_item = proto_tree_add_item(block_data_tree, hf_pcapng_section_header_byte_order_magic, tvb, offset, 4, ENC_NA); if (encoding == ENC_BIG_ENDIAN) proto_item_append_text(byte_order_magic_item, " (Big-endian)"); else proto_item_append_text(byte_order_magic_item, " (Little-endian)"); offset += 4; proto_tree_add_item(block_data_tree, hf_pcapng_section_header_major_version, tvb, offset, 2, encoding); offset += 2; proto_tree_add_item(block_data_tree, hf_pcapng_section_header_minor_version, tvb, offset, 2, encoding); offset += 2; proto_tree_add_item(block_data_tree, hf_pcapng_section_header_section_length, tvb, offset, 8, encoding); offset += 8; next_tvb = tvb_new_subset_length(tvb, offset, block_data_length - 4 - 2 - 2 - 8); offset += dissect_options(block_data_tree, pinfo, block_type, next_tvb, encoding, NULL); break; case BLOCK_INTERFACE_DESCRIPTION: { struct interface_description interface_description; memset(&interface_description, 0, sizeof(struct interface_description)); proto_item_append_text(block_item, " %u", info->interface_number); info->interface_number += 1; proto_tree_add_item(block_data_tree, hf_pcapng_interface_description_link_type, tvb, offset, 2, encoding); interface_description.link_type = tvb_get_guint16(tvb, offset, encoding); offset += 2; proto_tree_add_item(block_data_tree, hf_pcapng_interface_description_reserved, tvb, offset, 2, encoding); offset += 2; proto_tree_add_item(block_data_tree, hf_pcapng_interface_description_snap_length, tvb, offset, 4, encoding); offset += 4; next_tvb = tvb_new_subset_length(tvb, offset, block_data_length - 2 - 2 - 4); offset += dissect_options(block_data_tree, pinfo, block_type, next_tvb, encoding, &interface_description); wmem_array_append_one(info->interfaces, interface_description); } break; case BLOCK_PACKET: proto_item_append_text(block_item, " %u", info->frame_number); proto_tree_add_item(block_data_tree, hf_pcapng_packet_block_interface_id, tvb, offset, 2, encoding); interface_id = tvb_get_guint16(tvb, offset, encoding); offset += 2; proto_tree_add_item(block_data_tree, hf_pcapng_packet_block_drops_count, tvb, offset, 2, encoding); offset += 2; pcapng_add_timestamp(block_data_tree, pinfo, tvb, offset, encoding, interface_id, info); offset += 8; proto_tree_add_item_ret_uint(block_data_tree, hf_pcapng_captured_length, tvb, offset, 4, encoding, &captured_length); offset += 4; proto_tree_add_item_ret_uint(block_data_tree, hf_pcapng_packet_length, tvb, offset, 4, encoding, &reported_length); offset += 4; packet_data_item = proto_tree_add_item(block_data_tree, hf_pcapng_packet_data, tvb, offset, captured_length, encoding); if (pref_dissect_next_layer && interface_id < wmem_array_get_count(info->interfaces)) { struct interface_description *interface_description; proto_tree *packet_data_tree = proto_item_add_subtree(packet_data_item, ett_pcapng_packet_data); pinfo->num = info->frame_number; interface_description = (struct interface_description *) wmem_array_index(info->interfaces, interface_id); TRY { call_dissector_with_data(pcap_pktdata_handle, tvb_new_subset(tvb, offset, captured_length, reported_length), pinfo, packet_data_tree, &interface_description->link_type); } CATCH_BOUNDS_ERRORS { show_exception(tvb, pinfo, packet_data_tree, EXCEPT_CODE, GET_MESSAGE); } ENDTRY; } info->frame_number += 1; offset += captured_length; if (captured_length % 4) { proto_tree_add_item(block_data_tree, hf_pcapng_packet_padding, tvb, offset, captured_length % 4?(4 - captured_length % 4):0, ENC_NA); offset += captured_length % 4?(4 - captured_length % 4):0; } next_tvb = tvb_new_subset_length(tvb, offset, block_data_length - 2 - 2 - 8 - 4 - 4 - captured_length - (captured_length % 4?(4 - captured_length % 4):0)); offset += dissect_options(block_data_tree, pinfo, block_type, next_tvb, encoding, NULL); break; case BLOCK_SIMPLE_PACKET: proto_item_append_text(block_item, " %u", info->frame_number); proto_tree_add_item_ret_uint(block_data_tree, hf_pcapng_packet_length, tvb, offset, 4, encoding, &captured_length); offset += 4; interface_id = 0; packet_data_item = proto_tree_add_item(block_data_tree, hf_pcapng_packet_data, tvb, offset, captured_length, encoding); if (pref_dissect_next_layer && interface_id < wmem_array_get_count(info->interfaces)) { struct interface_description *interface_description; proto_tree *packet_data_tree = proto_item_add_subtree(packet_data_item, ett_pcapng_packet_data); pinfo->num = info->frame_number; interface_description = (struct interface_description *) wmem_array_index(info->interfaces, interface_id); TRY { call_dissector_with_data(pcap_pktdata_handle, tvb_new_subset_length(tvb, offset, captured_length), pinfo, packet_data_tree, &interface_description->link_type); } CATCH_BOUNDS_ERRORS { show_exception(tvb, pinfo, packet_data_tree, EXCEPT_CODE, GET_MESSAGE); } ENDTRY; } info->frame_number += 1; offset += captured_length; if (captured_length % 4) { proto_tree_add_item(block_data_tree, hf_pcapng_packet_padding, tvb, offset, captured_length % 4?(4 - captured_length % 4):0, ENC_NA); offset += captured_length % 4?(4 - captured_length % 4):0; } break; case BLOCK_NAME_RESOLUTION: { proto_tree *records_tree; proto_item *records_item; proto_tree *record_tree; proto_item *record_item; gint offset_record_start; gint offset_string_start; guint16 record_code; gint record_length; gint string_length; gchar *str = NULL; address addr; records_item = proto_tree_add_item(block_data_tree, hf_pcapng_records, tvb, offset, block_data_length, ENC_NA); records_tree = proto_item_add_subtree(records_item, ett_pcapng_records); offset_record_start = offset; while (block_data_length - (offset_record_start - offset) > 0) { record_code = tvb_get_guint16(tvb, offset, encoding); record_length = tvb_get_guint16(tvb, offset + 2, encoding); record_item = proto_tree_add_item(records_tree, hf_pcapng_record, tvb, offset, record_length + 2 * 2, ENC_NA); record_tree = proto_item_add_subtree(record_item, ett_pcapng_record); proto_item_append_text(record_item, ": %s", val_to_str_const(record_code, record_code_vals, "Unknown")); proto_tree_add_item(record_tree, hf_pcapng_record_code, tvb, offset, 2, encoding); offset += 2; proto_tree_add_item(record_tree, hf_pcapng_record_length, tvb, offset, 2, encoding); offset += 2; if (record_code == 0 && record_length == 0) { break; } else switch (record_code) { case 0x0001: /* IPv4 Record */ if (record_length < 5) { proto_tree_add_expert(record_tree, pinfo, &ei_invalid_record_length, tvb, offset, record_length); offset += record_length; break; } proto_tree_add_item(record_tree, hf_pcapng_record_ipv4, tvb, offset, 4, ENC_BIG_ENDIAN); set_address_tvb(&addr, AT_IPv4, 4, tvb, offset); offset += 4; offset_string_start = offset; while (offset - offset_string_start < record_length - 4) { string_length = tvb_strnlen(tvb, offset, (offset - offset_string_start) + record_length - 4); if (string_length >= 0) { proto_tree_add_item(record_tree, hf_pcapng_record_name, tvb, offset, string_length + 1, encoding); offset += string_length + 1; } else { proto_tree_add_item(record_tree, hf_pcapng_record_data, tvb, offset, (record_length - 4) - (offset - offset_string_start), encoding); offset += (record_length - 4) - (offset - offset_string_start); } } str = address_to_display(wmem_packet_scope(), &addr); break; case 0x0002: /* IPv6 Record */ if (record_length < 17) { proto_tree_add_expert(record_tree, pinfo, &ei_invalid_option_length, tvb, offset, record_length); offset += record_length; break; } proto_tree_add_item(record_tree, hf_pcapng_record_ipv6, tvb, offset, 16, ENC_NA); set_address_tvb(&addr, AT_IPv6, 16, tvb, offset); offset += 16; offset_string_start = offset; while (offset - offset_string_start < record_length - 16) { string_length = tvb_strnlen(tvb, offset, (offset - offset_string_start) + record_length - 16); if (string_length >= 0) { proto_tree_add_item(record_tree, hf_pcapng_record_name, tvb, offset, string_length + 1, encoding); offset += string_length + 1; } else { proto_tree_add_item(record_tree, hf_pcapng_record_data, tvb, offset, (record_length - 16) - (offset - offset_string_start), encoding); offset += (record_length - 16) - (offset - offset_string_start); } } str = address_to_display(wmem_packet_scope(), &addr); break; default: proto_tree_add_item(record_tree, hf_pcapng_record_data, tvb, offset, record_length, ENC_NA); offset += record_length; } if (record_code != 0 && record_length % 4) { proto_item_set_len(record_item, record_length + 2 * 2 + (4 - record_length % 4)); record_length = 4 - record_length % 4; proto_tree_add_item(record_tree, hf_pcapng_record_padding, tvb, offset, record_length, ENC_NA); offset += record_length; } if (str) proto_item_append_text(record_item, " = %s", str); } next_tvb = tvb_new_subset_length(tvb, offset, block_data_length - (offset - offset_record_start)); offset += dissect_options(block_data_tree, pinfo, block_type, next_tvb, encoding, NULL); } break; case BLOCK_INTERFACE_STATISTICS: proto_tree_add_item(block_data_tree, hf_pcapng_interface_id, tvb, offset, 4, encoding); interface_id = tvb_get_guint32(tvb, offset, encoding); offset += 4; pcapng_add_timestamp(block_data_tree, pinfo, tvb, offset, encoding, interface_id, info); offset += 8; next_tvb = tvb_new_subset_length(tvb, offset, block_data_length - 4 - 8); offset += dissect_options(block_data_tree, pinfo, block_type, next_tvb, encoding, NULL); break; case BLOCK_ENHANCED_PACKET: proto_item_append_text(block_item, " %u", info->frame_number); proto_tree_add_item(block_data_tree, hf_pcapng_interface_id, tvb, offset, 4, encoding); interface_id = tvb_get_guint32(tvb, offset, encoding); offset += 4; pcapng_add_timestamp(block_data_tree, pinfo, tvb, offset, encoding, interface_id, info); offset += 8; proto_tree_add_item_ret_uint(block_data_tree, hf_pcapng_captured_length, tvb, offset, 4, encoding, &captured_length); offset += 4; proto_tree_add_item_ret_uint(block_data_tree, hf_pcapng_packet_length, tvb, offset, 4, encoding, &reported_length); offset += 4; packet_data_item = proto_tree_add_item(block_data_tree, hf_pcapng_packet_data, tvb, offset, captured_length, encoding); if (pref_dissect_next_layer && interface_id < wmem_array_get_count(info->interfaces)) { struct interface_description *interface_description; proto_tree *packet_data_tree = proto_item_add_subtree(packet_data_item, ett_pcapng_packet_data); pinfo->num = info->frame_number; interface_description = (struct interface_description *) wmem_array_index(info->interfaces, interface_id); TRY { call_dissector_with_data(pcap_pktdata_handle, tvb_new_subset(tvb, offset, captured_length, reported_length), pinfo, packet_data_tree, &interface_description->link_type); } CATCH_BOUNDS_ERRORS { show_exception(tvb, pinfo, packet_data_tree, EXCEPT_CODE, GET_MESSAGE); } ENDTRY; } info->frame_number += 1; offset += captured_length; if (captured_length % 4) { proto_tree_add_item(block_data_tree, hf_pcapng_packet_padding, tvb, offset, captured_length % 4?(4 - captured_length % 4):0, ENC_NA); offset += captured_length % 4?(4 - captured_length % 4):0; } next_tvb = tvb_new_subset_length(tvb, offset, block_data_length - 4 - 8 - 4 - 4 - captured_length - (captured_length % 4?(4 - captured_length % 4):0)); offset += dissect_options(block_data_tree, pinfo, block_type, next_tvb, encoding, NULL); break; case BLOCK_IRIG_TIMESTAMP: case BLOCK_ARINC_429: default: offset += block_data_length; } proto_tree_add_item(block_tree, hf_pcapng_block_length, tvb, offset, 4, encoding); offset += 4; return offset; } #define BLOCK_TYPE_SIZE 4 #define BYTE_ORDER_MAGIC_SIZE 4 static int dissect_pcapng(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { static const guint8 pcapng_premagic[BLOCK_TYPE_SIZE] = { 0x0A, 0x0D, 0x0D, 0x0A }; static const guint8 pcapng_big_endian_magic[BYTE_ORDER_MAGIC_SIZE] = { 0x1A, 0x2B, 0x3C, 0x4D }; static const guint8 pcapng_little_endian_magic[BYTE_ORDER_MAGIC_SIZE] = { 0x4D, 0x3C, 0x2B, 0x1A }; gint offset = 0; guint32 length; guint32 encoding; proto_tree *main_tree; proto_item *main_item; struct info info; if (tvb_memeql(tvb, 0, pcapng_premagic, BLOCK_TYPE_SIZE) != 0) return 0; if (tvb_memeql(tvb, 8, pcapng_big_endian_magic, BYTE_ORDER_MAGIC_SIZE) == 0) { encoding = ENC_BIG_ENDIAN; } else if (tvb_memeql(tvb, 8, pcapng_little_endian_magic, BYTE_ORDER_MAGIC_SIZE) == 0) { encoding = ENC_LITTLE_ENDIAN; } else { return 0; } info.file_number = 1; info.interface_number = 0; info.frame_number = 1; info.interfaces = wmem_array_new(wmem_packet_scope(), sizeof(struct interface_description)); main_item = proto_tree_add_item(tree, proto_pcapng, tvb, offset, -1, ENC_NA); main_tree = proto_item_add_subtree(main_item, ett_pcapng); while (tvb_captured_length_remaining(tvb, offset)) { tvbuff_t *next_tvb; length = tvb_get_guint32(tvb, offset + 4, encoding); next_tvb = tvb_new_subset_length(tvb, offset, length); offset += dissect_block(main_tree, pinfo, next_tvb, encoding, &info); } return offset; } static gboolean dissect_pcapng_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { return dissect_pcapng(tvb, pinfo, tree, NULL) > 0; } void proto_register_pcapng(void) { module_t *module; expert_module_t *expert_module; static hf_register_info hf[] = { { &hf_pcapng_block, { "Block", "pcapng.block", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_block_type, { "Block Type", "pcapng.block.type", FT_UINT32, BASE_HEX, VALS(block_type_vals), 0x00, NULL, HFILL } }, { &hf_pcapng_block_type_vendor, { "Block Type Vendor", "pcapng.block.type.vendor", FT_BOOLEAN, 32, NULL, 0x80000000, NULL, HFILL } }, { &hf_pcapng_block_type_value, { "Block Type Value", "pcapng.block.type.value", FT_UINT32, BASE_HEX, VALS(block_type_vals), 0x7FFFFFFF, NULL, HFILL } }, { &hf_pcapng_block_length, { "Block Length", "pcapng.block.length", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_block_data, { "Block Data", "pcapng.block.data", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_options, { "Options", "pcapng.options", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option, { "Option", "pcapng.options.option", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_code_interface_description, { "Code", "pcapng.options.option.code", FT_UINT16, BASE_DEC, VALS(option_code_interface_description_vals), 0x00, NULL, HFILL } }, { &hf_pcapng_option_code_enhanced_packet, { "Code", "pcapng.options.option.code", FT_UINT16, BASE_DEC, VALS(option_code_enhanced_packet_vals), 0x00, NULL, HFILL } }, { &hf_pcapng_option_code_packet, { "Code", "pcapng.options.option.code", FT_UINT16, BASE_DEC, VALS(option_code_packet_vals), 0x00, NULL, HFILL } }, { &hf_pcapng_option_code_name_resolution, { "Code", "pcapng.options.option.code", FT_UINT16, BASE_DEC, VALS(option_code_name_resolution_vals), 0x00, NULL, HFILL } }, { &hf_pcapng_option_code_interface_statistics, { "Code", "pcapng.options.option.code", FT_UINT16, BASE_DEC, VALS(option_code_interface_statistics_vals), 0x00, NULL, HFILL } }, { &hf_pcapng_option_code, { "Code", "pcapng.options.option.code", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_length, { "Length", "pcapng.options.option.length", FT_INT64, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data, { "Option Data", "pcapng.options.option.data", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_padding, { "Option Padding", "pcapng.options.option.padding", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_comment, { "Comment", "pcapng.options.option.data.comment", FT_STRING, STR_ASCII, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_section_header_byte_order_magic, { "Byte Order Magic", "pcapng.section_header.byte_order_magic", FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_section_header_major_version, { "Major Version", "pcapng.section_header.version.major", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_section_header_minor_version, { "Minor Version", "pcapng.section_header.version.minor", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_section_header_section_length, { "Section Length", "pcapng.section_header.section_length", FT_INT64, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_code_section_header, { "Code", "pcapng.options.option.code", FT_UINT16, BASE_DEC, VALS(option_code_section_header_vals), 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_section_header_hardware, { "Hardware", "pcapng.options.option.data.hardware", FT_STRING, STR_ASCII, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_section_header_os, { "OS", "pcapng.options.option.data.os", FT_STRING, STR_ASCII, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_section_header_user_application, { "User Application", "pcapng.options.option.data.user_application", FT_STRING, STR_ASCII, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_description_name, { "Name", "pcapng.options.option.data.interface.name", FT_STRING, STR_ASCII, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_description_description, { "Description", "pcapng.options.option.data.interface.description", FT_STRING, STR_ASCII, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_ipv4, { "IPv4", "pcapng.options.option.data.ipv4", FT_IPv4, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_ipv4_mask, { "IPv4 Mask", "pcapng.options.option.data.ipv4_mask", FT_IPv4, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_ipv6, { "IPv6", "pcapng.options.option.data.ipv6", FT_IPv6, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_ipv6_mask, { "IPv6 Mask", "pcapng.options.option.data.ipv6_mask", FT_UINT8, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_mac_address, { "MAC Address", "pcapng.options.option.data.mac", FT_ETHER, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_eui_address, { "EUI Address", "pcapng.options.option.data.eui", FT_EUI64, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_speed, { "Speed", "pcapng.options.option.data.interface.speed", FT_UINT64, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_timestamp_resolution, { "Timestamp Resolution", "pcapng.options.option.data.interface.timestamp_resolution", FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_timestamp_resolution_base, { "Base", "pcapng.options.option.data.interface.timestamp_resolution.base", FT_UINT8, BASE_HEX, VALS(timestamp_resolution_base_vals), 0x80, NULL, HFILL } }, { &hf_pcapng_option_data_interface_timestamp_resolution_value, { "Value", "pcapng.options.option.data.interface.timestamp_resolution.value", FT_UINT8, BASE_DEC, NULL, 0x7F, NULL, HFILL } }, { &hf_pcapng_option_data_interface_timezone, { "Timezone", "pcapng.options.option.data.interface.timezone", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_filter, { "Filter", "pcapng.options.option.data.interface.filter", FT_STRING, STR_ASCII, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_os, { "OS", "pcapng.options.option.data.interface.os", FT_STRING, STR_ASCII, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_fcs_length, { "FCS Length", "pcapng.options.option.data.interface.fcs_length", FT_UINT8, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_timestamp_offset, { "Timestamp Offset", "pcapng.options.option.data.interface.timestamp_offset", FT_UINT64, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_packet_drop_count, { "Drop Count", "pcapng.options.option.data.packet.drop_count", FT_UINT64, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_packet_hash_algorithm, { "Hash Algorithm", "pcapng.options.option.data.packet.hash.algorithm", FT_UINT8, BASE_HEX, VALS(packet_hash_algorithm_vals), 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_packet_hash_data, { "Hash Data", "pcapng.options.option.data.packet.hash.data", FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_link_layer_errors, { "Link Layer Errors", "pcapng.options.option.data.packet.flags.link_layer_errors", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_link_layer_errors_symbol, { "Symbol Error", "pcapng.options.option.data.packet.flags.link_layer_errors.symbol", FT_BOOLEAN, 16, NULL, 0x8000, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_link_layer_errors_preamble, { "Preamble Error", "pcapng.options.option.data.packet.flags.link_layer_errors.preamble", FT_BOOLEAN, 16, NULL, 0x8000, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_link_layer_errors_start_frame_delimiter, { "Preamble Error", "pcapng.options.option.data.packet.flags.link_layer_errors.preamble", FT_BOOLEAN, 16, NULL, 0x8000, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_link_layer_errors_unaligned_frame, { "Preamble Error", "pcapng.options.option.data.packet.flags.link_layer_errors.preamble", FT_BOOLEAN, 16, NULL, 0x4000, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_link_layer_errors_wrong_inter_frame_gap, { "Wrong Inter Frame Gap", "pcapng.options.option.data.packet.flags.link_layer_errors.wrong_inter_frame_gap", FT_BOOLEAN, 16, NULL, 0x2000, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_link_layer_errors_packet_too_short, { "Packet Too Short", "pcapng.options.option.data.packet.flags.link_layer_errors.packet_too_short", FT_BOOLEAN, 16, NULL, 0x1000, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_link_layer_errors_packet_too_long, { "Packet Too Long", "pcapng.options.option.data.packet.flags.link_layer_errors.packet_too_long", FT_BOOLEAN, 16, NULL, 0x0800, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_link_layer_errors_crc_error, { "CRC Error", "pcapng.options.option.data.packet.flags.link_layer_errors.crc", FT_BOOLEAN, 16, NULL, 0x0400, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_link_layer_errors_reserved, { "Reserved", "pcapng.options.option.data.packet.flags.link_layer_errors.reserved", FT_UINT16, BASE_HEX, NULL, 0x03FF, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags, { "Flags", "pcapng.options.option.data.packet.flags", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_reserved, { "Reserved", "pcapng.options.option.data.packet.flags.reserved", FT_UINT16, BASE_HEX, NULL, 0xFE00, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_fcs_length, { "FCS Length", "pcapng.options.option.data.packet.flags.fcs_length", FT_UINT16, BASE_DEC, NULL, 0x01E0, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_reception_type, { "Reception Type", "pcapng.options.option.data.packet.flags.reception_type", FT_UINT16, BASE_HEX, VALS(flags_reception_type_vals), 0x001C, NULL, HFILL } }, { &hf_pcapng_option_data_packet_flags_direction, { "Direction", "pcapng.options.option.data.packet.flags.direction", FT_UINT16, BASE_HEX, VALS(packet_flags_direction_vals), 0x0003, NULL, HFILL } }, { &hf_pcapng_option_data_dns_name, { "DNS Name", "pcapng.options.option.data.dns_name", FT_STRING, STR_ASCII, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_start_time, { "Start Time", "pcapng.options.option.data.start_time", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_end_time, { "End Time", "pcapng.options.option.data.end_time", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_received, { "Number of Received Packets", "pcapng.options.option.data.interface.received", FT_UINT64, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_dropped, { "Number of Dropped Packets", "pcapng.options.option.data.interface.dropped", FT_UINT64, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_accepted_by_filter, { "Number of Accepted by Filter Packets", "pcapng.options.option.data.interface.accepted_by_filter", FT_UINT64, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_dropped_by_os, { "Number of Dropped Packets by OS", "pcapng.options.option.data.interface.dropped_by_os", FT_UINT64, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_option_data_interface_delivered_to_user, { "Number of Delivered to the User Packets", "pcapng.options.option.data.interface.delivered_to_user", FT_UINT64, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_interface_description_link_type, { "Link Type", "pcapng.interface_description.link_type", FT_UINT16, BASE_DEC_HEX, VALS(link_type_vals), 0x00, NULL, HFILL } }, { &hf_pcapng_interface_description_reserved, { "Reserved", "pcapng.interface_description.reserved", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_interface_description_snap_length, { "Snap Length", "pcapng.interface_description.snap_length", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_packet_block_interface_id, { "Interface", "pcapng.packet.interface_id", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_packet_block_drops_count, { "Drops Count", "pcapng.packet.drops_count", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_captured_length, { "Captured Length", "pcapng.packet.captured_length", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_packet_length, { "Packet Length", "pcapng.packet.packet_length", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_packet_data, { "Packet Data", "pcapng.packet.packet_data", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_packet_padding, { "Packet Padding", "pcapng.packet.padding", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_interface_id, { "Interface", "pcapng.interface_id", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_timestamp_high, { "Timestamp (High)", "pcapng.timestamp_high", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_timestamp_low, { "Timestamp (Low)", "pcapng.timestamp_low", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_timestamp, { "Timestamp", "pcapng.timestamp", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_records, { "Records", "pcapng.records", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_record, { "Record", "pcapng.records.record", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_record_code, { "Code", "pcapng.records.record.code", FT_UINT16, BASE_DEC, VALS(record_code_vals), 0x00, NULL, HFILL } }, { &hf_pcapng_record_length, { "Length", "pcapng.records.record.length", FT_INT64, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_record_data, { "Record Data", "pcapng.records.record.data", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_record_padding, { "Record Padding", "pcapng.records.record.padding", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_record_ipv4, { "IPv4", "pcapng.records.record.data.ipv4", FT_IPv4, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_record_ipv6, { "IPv6", "pcapng.records.record.data.ipv6", FT_IPv6, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_pcapng_record_name, { "Name", "pcapng.records.record.data.name", FT_STRINGZ, STR_ASCII, NULL, 0x00, NULL, HFILL } }, }; static ei_register_info ei[] = { { &ei_invalid_option_length, { "pcapng.invalid_option_length", PI_PROTOCOL, PI_ERROR, "Invalid Option Length", EXPFILL }}, { &ei_invalid_record_length, { "pcapng.invalid_record_length", PI_PROTOCOL, PI_ERROR, "Invalid Record Length", EXPFILL }}, }; static gint *ett[] = { &ett_pcapng, &ett_pcapng_section_header_block, &ett_pcapng_block_data, &ett_pcapng_options, &ett_pcapng_option, &ett_pcapng_records, &ett_pcapng_record, &ett_pcapng_packet_data }; proto_pcapng = proto_register_protocol("PCAPNG File Format", "File-PCAPNG", "file-pcapng"); proto_register_field_array(proto_pcapng, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); register_dissector("file-pcapng", dissect_pcapng, proto_pcapng); module = prefs_register_protocol(proto_pcapng, NULL); prefs_register_static_text_preference(module, "version", "PCAPNG version: 1.0", "Version of file-format supported by this dissector."); prefs_register_bool_preference(module, "dissect_next_layer", "Dissect next layer", "Dissect next layer", &pref_dissect_next_layer); expert_module = expert_register_protocol(proto_pcapng); expert_register_field_array(expert_module, ei, array_length(ei)); } void proto_reg_handoff_pcapng(void) { heur_dissector_add("wtap_file", dissect_pcapng_heur, "PCAPNG File", "pcapng_wtap", proto_pcapng, HEURISTIC_ENABLE); pcap_pktdata_handle = find_dissector_add_dependency("pcap_pktdata", proto_pcapng); } /* * Editor modelines - http://www.wireshark.org/tools/modelines.html * * Local variables: * c-basic-offset: 4 * tab-width: 8 * indent-tabs-mode: nil * End: * * vi: set shiftwidth=4 tabstop=8 expandtab: * :indentSize=4:tabSize=8:noTabs=true: */