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|
/* 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 <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/expert.h>
#include <epan/exceptions.h>
#include <epan/show_exception.h>
#include <epan/addr_resolv.h>
#include <epan/tfs.h>
#include <wiretap/pcapng_module.h>
#include <wiretap/secrets-types.h>
#include "file-pcapng.h"
#include "packet-pcap_pktdata.h"
static int proto_pcapng;
static dissector_handle_t pcap_pktdata_handle;
static int hf_pcapng_block;
static int hf_pcapng_block_type;
static int hf_pcapng_block_type_vendor;
static int hf_pcapng_block_type_value;
static int hf_pcapng_block_length;
static int hf_pcapng_block_length_trailer;
static int hf_pcapng_block_data;
static int hf_pcapng_section_header_byte_order_magic;
static int hf_pcapng_section_header_major_version;
static int hf_pcapng_section_header_minor_version;
static int hf_pcapng_section_header_section_length;
static int hf_pcapng_options;
static int hf_pcapng_option;
static int hf_pcapng_option_code;
static int hf_pcapng_option_code_section_header;
static int hf_pcapng_option_code_interface_description;
static int hf_pcapng_option_code_enhanced_packet;
static int hf_pcapng_option_code_packet;
static int hf_pcapng_option_code_interface_statistics;
static int hf_pcapng_option_code_name_resolution;
static int hf_pcapng_option_length;
static int hf_pcapng_option_data;
static int hf_pcapng_option_data_comment;
static int hf_pcapng_option_data_section_header_hardware;
static int hf_pcapng_option_data_section_header_os;
static int hf_pcapng_option_data_section_header_user_application;
static int hf_pcapng_option_data_interface_description_name;
static int hf_pcapng_option_data_interface_description_description;
static int hf_pcapng_option_data_ipv4;
static int hf_pcapng_option_data_ipv4_mask;
static int hf_pcapng_option_data_ipv6;
static int hf_pcapng_option_data_ipv6_mask;
static int hf_pcapng_option_data_mac_address;
static int hf_pcapng_option_data_eui_address;
static int hf_pcapng_option_data_interface_speed;
static int hf_pcapng_option_data_interface_timestamp_resolution;
static int hf_pcapng_option_data_interface_timestamp_resolution_base;
static int hf_pcapng_option_data_interface_timestamp_resolution_value;
static int hf_pcapng_option_data_interface_timezone;
static int hf_pcapng_option_data_interface_filter_type;
static int hf_pcapng_option_data_interface_filter_string;
static int hf_pcapng_option_data_interface_filter_bpf_program;
static int hf_pcapng_option_data_interface_filter_unknown;
static int hf_pcapng_option_data_interface_os;
static int hf_pcapng_option_data_interface_hardware;
static int hf_pcapng_option_data_interface_fcs_length;
static int hf_pcapng_option_data_interface_timestamp_offset;
static int hf_pcapng_option_data_packet_verdict_type;
static int hf_pcapng_option_data_packet_verdict_data;
static int hf_pcapng_option_data_packet_queue;
static int hf_pcapng_option_data_packet_id;
static int hf_pcapng_option_data_packet_drop_count;
static int hf_pcapng_option_data_packet_hash_algorithm;
static int hf_pcapng_option_data_packet_hash_data;
static int hf_pcapng_option_data_packet_flags;
static int hf_pcapng_option_data_packet_flags_link_layer_errors;
static int hf_pcapng_option_data_packet_flags_link_layer_errors_symbol;
static int hf_pcapng_option_data_packet_flags_link_layer_errors_preamble;
static int hf_pcapng_option_data_packet_flags_link_layer_errors_start_frame_delimiter;
static int hf_pcapng_option_data_packet_flags_link_layer_errors_unaligned_frame;
static int hf_pcapng_option_data_packet_flags_link_layer_errors_wrong_inter_frame_gap;
static int hf_pcapng_option_data_packet_flags_link_layer_errors_packet_too_short;
static int hf_pcapng_option_data_packet_flags_link_layer_errors_packet_too_long;
static int hf_pcapng_option_data_packet_flags_link_layer_errors_crc_error;
static int hf_pcapng_option_data_packet_flags_link_layer_errors_reserved;
static int hf_pcapng_option_data_packet_flags_reserved;
static int hf_pcapng_option_data_packet_flags_fcs_length;
static int hf_pcapng_option_data_packet_flags_reception_type;
static int hf_pcapng_option_data_packet_flags_direction;
static int hf_pcapng_option_data_dns_name;
static int hf_pcapng_option_data_start_time;
static int hf_pcapng_option_data_end_time;
static int hf_pcapng_option_data_interface_received;
static int hf_pcapng_option_data_interface_dropped;
static int hf_pcapng_option_data_interface_accepted_by_filter;
static int hf_pcapng_option_data_interface_dropped_by_os;
static int hf_pcapng_option_data_interface_delivered_to_user;
static int hf_pcapng_option_padding;
static int hf_pcapng_interface_description_link_type;
static int hf_pcapng_interface_description_reserved;
static int hf_pcapng_interface_description_snap_length;
static int hf_pcapng_packet_block_interface_id;
static int hf_pcapng_packet_block_drops_count;
static int hf_pcapng_captured_length;
static int hf_pcapng_original_length;
static int hf_pcapng_packet_data;
static int hf_pcapng_packet_padding;
static int hf_pcapng_interface_id;
static int hf_pcapng_timestamp_high;
static int hf_pcapng_timestamp_low;
static int hf_pcapng_timestamp;
static int hf_pcapng_records;
static int hf_pcapng_record;
static int hf_pcapng_record_code;
static int hf_pcapng_record_length;
static int hf_pcapng_record_data;
static int hf_pcapng_record_ipv4;
static int hf_pcapng_record_ipv6;
static int hf_pcapng_record_name;
static int hf_pcapng_record_padding;
static int hf_pcapng_dsb_secrets_type;
static int hf_pcapng_dsb_secrets_length;
static int hf_pcapng_dsb_secrets_data;
static int hf_pcapng_cb_pen;
static int hf_pcapng_cb_data;
static int hf_pcapng_cb_option_string;
static int hf_pcapng_cb_option_data;
static int hf_pcapng_option_data_packet_darwin_dpeb_id;
static int hf_pcapng_option_data_packet_darwin_svc_class;
static int hf_pcapng_option_data_packet_darwin_edpeb_id;
static int hf_pcapng_option_data_packet_darwin_flags;
static int hf_pcapng_option_data_packet_darwin_flags_reserved;
static int hf_pcapng_option_data_packet_darwin_flags_wk;
static int hf_pcapng_option_data_packet_darwin_flags_ch;
static int hf_pcapng_option_data_packet_darwin_flags_so;
static int hf_pcapng_option_data_packet_darwin_flags_re;
static int hf_pcapng_option_data_packet_darwin_flags_ka;
static int hf_pcapng_option_data_packet_darwin_flags_nf;
static int hf_pcapng_option_data_packet_darwin_flow_id;
static expert_field ei_invalid_byte_order_magic;
static expert_field ei_block_length_below_block_minimum;
static expert_field ei_block_length_below_block_content_length;
static expert_field ei_block_length_not_multiple_of_4;
static expert_field ei_block_lengths_dont_match;
static expert_field ei_invalid_option_length;
static expert_field ei_invalid_record_length;
static expert_field ei_missing_idb;
static int ett_pcapng;
static int ett_pcapng_section_header_block;
static int ett_pcapng_block_data;
static int ett_pcapng_block_type;
static int ett_pcapng_options;
static int ett_pcapng_option;
static int ett_pcapng_records;
static int ett_pcapng_record;
static int ett_pcapng_packet_data;
static int * const 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 int * const 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 int * const 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 int * const hfx_pcapng_option_data_packet_darwin_flags[] = {
&hf_pcapng_option_data_packet_darwin_flags_reserved,
&hf_pcapng_option_data_packet_darwin_flags_wk,
&hf_pcapng_option_data_packet_darwin_flags_ch,
&hf_pcapng_option_data_packet_darwin_flags_so,
&hf_pcapng_option_data_packet_darwin_flags_re,
&hf_pcapng_option_data_packet_darwin_flags_ka,
&hf_pcapng_option_data_packet_darwin_flags_nf,
NULL
};
static bool pref_dissect_next_layer;
static const value_string block_type_vals[] = {
{ BLOCK_TYPE_IDB, "Interface Description Block" },
{ BLOCK_TYPE_PB, "Packet Block" },
{ BLOCK_TYPE_SPB, "Simple Packet Block" },
{ BLOCK_TYPE_NRB, "Name Resolution Block" },
{ BLOCK_TYPE_ISB, "Interface Statistics Block" },
{ BLOCK_TYPE_EPB, "Enhanced Packet Block" },
{ BLOCK_TYPE_IRIG_TS, "IRIG Timestamp Block" },
{ BLOCK_TYPE_ARINC_429, "Arinc 429 in AFDX Encapsulation Information Block" },
{ BLOCK_TYPE_SYSTEMD_JOURNAL_EXPORT, "systemd Journal Export Block" },
{ BLOCK_TYPE_DSB, "Decryption Secrets Block" },
{ BLOCK_TYPE_SYSDIG_MI, "Sysdig Machine Info Block" },
{ BLOCK_TYPE_SYSDIG_PL_V1, "Sysdig Process List Block" },
{ BLOCK_TYPE_SYSDIG_FDL_V1, "Sysdig File Descriptor List Block" },
{ BLOCK_TYPE_SYSDIG_EVENT, "Sysdig Event Block" },
{ BLOCK_TYPE_SYSDIG_IL_V1, "Sysdig Interface List Block" },
{ BLOCK_TYPE_SYSDIG_UL_V1, "Sysdig User List Block" },
{ BLOCK_TYPE_SYSDIG_PL_V2, "Sysdig Process List Block version 2" },
{ BLOCK_TYPE_SYSDIG_EVF, "Sysdig Event Block with flags" },
{ BLOCK_TYPE_SYSDIG_PL_V3, "Sysdig Process List Block version 3" },
{ BLOCK_TYPE_SYSDIG_PL_V4, "Sysdig Process List Block version 4" },
{ BLOCK_TYPE_SYSDIG_PL_V5, "Sysdig Process List Block version 5" },
{ BLOCK_TYPE_SYSDIG_PL_V6, "Sysdig Process List Block version 6" },
{ BLOCK_TYPE_SYSDIG_PL_V7, "Sysdig Process List Block version 7" },
{ BLOCK_TYPE_SYSDIG_PL_V8, "Sysdig Process List Block version 8" },
{ BLOCK_TYPE_SYSDIG_PL_V9, "Sysdig Process List Block version 9" },
{ BLOCK_TYPE_SYSDIG_EVENT_V2, "Sysdig Event Block v2" },
{ BLOCK_TYPE_SYSDIG_EVF_V2, "Sysdig Event Block with flags v2" },
{ BLOCK_TYPE_SYSDIG_FDL_V2, "Sysdig File Descriptor List Block" },
{ BLOCK_TYPE_SYSDIG_IL_V2, "Sysdig Interface List Block version 2" },
{ BLOCK_TYPE_SYSDIG_UL_V2, "Sysdig User List Block version 2" },
{ BLOCK_TYPE_SYSDIG_EVENT_V2_LARGE, "Sysdig Event Block v2 large payload" },
{ BLOCK_TYPE_SYSDIG_EVF_V2_LARGE, "Sysdig Event Block with flags v2 large payload" },
{ BLOCK_TYPE_CB_COPY, "Custom Block which can be copied"},
{ BLOCK_TYPE_CB_NO_COPY, "Custom Block which should not be copied"},
{ BLOCK_TYPE_SHB, "Section Header Block" },
{ 0, NULL }
};
/* blockId-> local_block_callback_info_t* */
static GHashTable *s_local_block_callback_table;
#define OPTION_CODE_CUSTOM_OPTIONS \
{ 2988, "Custom Option UTF-8 string which can be copied" }, \
{ 2989, "Custom Option which can be copied" }, \
{ 19372, "Custom Option UTF-8 string which should not be copied" }, \
{ 19373, "Custom Option which should not be copied" }
static const value_string option_code_section_header_vals[] = {
{ 0, "End of Options" },
{ 1, "Comment" },
{ 2, "Hardware Description" },
{ 3, "OS Description" },
{ 4, "User Application" },
OPTION_CODE_CUSTOM_OPTIONS,
{ 0, NULL }
};
static const value_string option_code_interface_description_vals[] = {
{ 0, "End of Options" },
{ 1, "Comment" },
{ 2, "Interface Name" },
{ 3, "Interface Description" },
{ 4, "IPv4 Address" },
{ 5, "IPv6 Address" },
{ 6, "MAC Address" },
{ 7, "EUI Address" },
{ 8, "Speed" },
{ 9, "Timestamp Resolution" },
{ 10, "Timezone" },
{ 11, "Filter" },
{ 12, "OS" },
{ 13, "FCS Length" },
{ 14, "Timestamp Offset" },
{ 15, "Hardware" },
OPTION_CODE_CUSTOM_OPTIONS,
{ 0, NULL }
};
/*
* Enhanced Packet Block (EPB) options for supporting Darwin process information
*
* Enhanced Packet Blocks may be augmented with an Apple defined Darwin
* process event block id option (dpeb_id) and / or an effective Darwin
* process event block id option (edpeb_id) that refer to particular
* Darwin processes via the supplied DPEB ID option payload value. There
* must be a Darwin Process Event Block for each Darwin process to which an
* augmented EPB references. If the file does not contain any EPBs that
* contain any Darwin dpeb_id or edpeb_id options then the file does not need
* to have any DPEBs.
*
* A Darwin Process Event Block is valid only inside the section to which
* it belongs. The structure of a Darwin Process Event Block is shown in
* Figure XXX.1 below.
*
* An Enhanced Packet Block (EPB) may be augmented with any or all of the
* following block options for Darwin process information:
*
* +------------------+-------+--------+-------------------+
* | Name | Code | Length | Multiple allowed? |
* +------------------+-------+--------+-------------------+
* | darwin_dpeb_id | 32769 | 4 | no? |
* | darwin_svc_class | 32770 | 4 | no? |
* | darwin_edpeb_id | 32771 | 4 | no? |
* | darwin_flags | 32772 | 4 | no? |
* | darwin_flow_id | 32773 | 4 | no? |
* +------------------+------+---------+-------------------+
*
* Table XXX.2: Darwin options for Enhanced Packet Blocks
*
* darwin_dpeb_id:
* The darwin_dpeb_id option specifies the Darwin Process Event
* Block ID for the process (proc) this packet is associated with;
* the correct DPEB will be the one whose DPEB ID (within the
* current Section of the file) is identified by the same number
* (see Section XXX.X) of this field. The DPEB ID MUST be valid,
* which means that a matching Darwin Process Event Block MUST
* exist.
*
* darwin_srv_class:
* The darwin_svc_class option is a number that maps to a
* specific Darwin Service Class mnemonic that the packet is
* associated with.
*
* The following Darwin Service Class values are defined:
*
* +---------------------+------------------------+
* | Service Class Value | Service Class Mnemonic |
* +---------------------+------------------------+
* | 0 | BE |
* | 100 | BK_SYS |
* | 200 | BK |
* | 300 | RD |
* | 400 | OAM |
* | 500 | AV |
* | 600 | RV |
* | 700 | VI |
* | 800 | VO |
* | 900 | CTL |
* +---------------------+------------------------+
*
* Table XXX.3: Darwin Service Class Option Values
*
* darwin_edpeb_id:
* The darwin_edpeb_id option specifies the Darwin Process Event
* Block ID for the effective process (eproc) this packet is
* associated with; the correct DPEB will be the one whose DPEB
* ID (within the current Section of the file) is identified by
* the same number (see Section XXX.X) of this field. The DPEB
* ID MUST be valid, which means that a matching Darwin Process
* Event Block MUST exist.
*
* darwin_flags:
* The darwin_flags option is a 32 bit field for indicating
* various Darwin specific flags.
*
* The following Darwin Flags are defined:
*
* +-------------------------+
* | FLAG_MASK | Flag |
* +-------------------------+
* | 0x00000020 | wk |
* | 0x00000010 | ch |
* | 0x00000008 | so |
* | 0x00000004 | re |
* | 0x00000002 | ka |
* | 0x00000001 | nf |
* +-------------------------+
*
* Table XXX.4: Darwin Flags
*
* wk = Wake Packet
* ch = Nexus Channel
* so = Socket
* re = ReXmit
* ka = Keep Alive
* nf = New Flow
*
* darwin_flow_id:
* The darwin_flow_id option is a 32 bit value that
* identifies a specific flow this packet is a part of.
*/
static const value_string option_code_enhanced_packet_vals[] = {
{ 0, "End of Options" },
{ 1, "Comment" },
{ 2, "Flags" },
{ 3, "Hash" },
{ 4, "Drop Count" },
{ 5, "Packet ID" },
{ 6, "Queue" },
{ 7, "Verdict" },
OPTION_CODE_CUSTOM_OPTIONS,
{ 32769, "Darwin DPEB ID" },
{ 32770, "Darwin Service Class" },
{ 32771, "Darwin Effective DPEB ID" },
{ 32772, "Darwin Flags" },
{ 32773, "Darwin Flow ID" },
{ 0, NULL }
};
static const value_string option_code_packet_vals[] = {
{ 0, "End of Options" },
{ 1, "Comment" },
{ 2, "Flags" },
{ 3, "Hash" },
OPTION_CODE_CUSTOM_OPTIONS,
{ 0, NULL }
};
static const value_string option_code_name_resolution_vals[] = {
{ 0, "End of Options" },
{ 1, "Comment" },
{ 2, "DNS Name" },
{ 3, "DNS IPv4 Address" },
{ 4, "DNS IPv6 Address" },
OPTION_CODE_CUSTOM_OPTIONS,
{ 0, NULL }
};
static const value_string option_code_interface_statistics_vals[] = {
{ 0, "End of Options" },
{ 1, "Comment" },
{ 2, "Start Time" },
{ 3, "End Time" },
{ 4, "Number of Received Packets" },
{ 5, "Number of Dropped Packets" },
{ 6, "Number of Accepted Packets" },
{ 7, "Number of Packets Dropped by OS" },
{ 8, "Number of Packets Delivered to the User" },
OPTION_CODE_CUSTOM_OPTIONS,
{ 0, NULL }
};
static const value_string option_code_darwin_svc_class_vals[] = {
{ 0x0000, "BE" },
{ 0x0064, "BK_SYS" },
{ 0x00C8, "BK" },
{ 0x012C, "RD" },
{ 0x0190, "OAM" },
{ 0x01F4, "AV" },
{ 0x0258, "RV" },
{ 0x02BC, "VI" },
{ 0x0320, "VO" },
{ 0x0384, "CTL" },
{ 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 interface_filter_type_vals[] = {
{ 0, "Libpcap string" },
{ 1, "BPF program" },
{ 0, NULL }
};
static const value_string packet_verdict_type_vals[] = {
{ 0, "Hardware" },
{ 1, "Linux eBPF TC" },
{ 2, "Linux eBPF XDP" },
{ 0, NULL }
};
static const value_string packet_hash_algorithm_vals[] = {
{ 0, "2's complement" },
{ 1, "XOR" },
{ 2, "CRC32" },
{ 3, "MD5" },
{ 4, "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 }
};
static const value_string dsb_secrets_types_vals[] = {
{ SECRETS_TYPE_TLS, "TLS Key Log" },
{ SECRETS_TYPE_SSH, "SSH Key Log" },
{ SECRETS_TYPE_WIREGUARD, "WireGuard Key Log" },
{ SECRETS_TYPE_ZIGBEE_NWK_KEY, "Zigbee NWK Key" },
{ SECRETS_TYPE_ZIGBEE_APS_KEY, "Zigbee APS Key" },
{ SECRETS_TYPE_OPCUA, "OPC UA Key Log" },
{ 0, NULL }
};
void proto_register_pcapng(void);
void proto_reg_handoff_pcapng(void);
#define BYTE_ORDER_MAGIC_SIZE 4
static const uint8_t pcapng_big_endian_magic[BYTE_ORDER_MAGIC_SIZE] = {
0x1A, 0x2B, 0x3C, 0x4D
};
static const uint8_t pcapng_little_endian_magic[BYTE_ORDER_MAGIC_SIZE] = {
0x4D, 0x3C, 0x2B, 0x1A
};
static
void dissect_custom_options(proto_tree *tree, packet_info *pinfo _U_, tvbuff_t *tvb, int offset,
uint32_t option_code, uint32_t option_length, unsigned encoding)
{
proto_tree_add_item(tree, hf_pcapng_cb_pen, tvb, offset, 4, encoding);
offset += 4;
/* Todo: Add known PEN custom options dissection. */
switch (option_code) {
case 2988:
case 19372:
proto_tree_add_item(tree, hf_pcapng_cb_option_string, tvb, offset, option_length - 4, ENC_UTF_8);
break;
case 2989:
case 19373:
proto_tree_add_item(tree, hf_pcapng_cb_option_data, tvb, offset, option_length - 4, encoding);
break;
}
}
int dissect_options(proto_tree *tree, packet_info *pinfo,
uint32_t block_type, tvbuff_t *tvb, int offset, unsigned encoding,
void *user_data)
{
proto_tree *options_tree;
proto_item *options_item;
proto_tree *option_tree;
proto_item *option_item;
proto_item *option_length_item;
proto_item *p_item;
uint32_t option_code;
uint32_t option_length;
int hfj_pcapng_option_code;
char *str;
const char *const_str;
wmem_strbuf_t *strbuf;
address addr;
address addr_mask;
uint32_t if_filter_type;
const value_string *vals = NULL;
uint8_t value_u8;
uint32_t value_u32;
uint64_t value_u64;
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return 0;
/* Lookup handlers for known local block type */
local_block_callback_info_t *p_local_block_callback = NULL;
if (block_type >= 0x80000000) {
p_local_block_callback = (local_block_callback_info_t*)g_hash_table_lookup(s_local_block_callback_table, GUINT_TO_POINTER(block_type));
DISSECTOR_ASSERT((p_local_block_callback->option_root_hf > 0) &&
p_local_block_callback->option_dissector &&
p_local_block_callback->option_vals);
}
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_reported_length_remaining(tvb, offset) > 0) {
str = NULL;
option_item = proto_tree_add_item(options_tree, hf_pcapng_option, tvb, offset, -1, ENC_NA);
option_tree = proto_item_add_subtree(option_item, ett_pcapng_option);
/* TODO: could have done this once outside of loop? */
switch (block_type) {
case BLOCK_TYPE_SHB:
hfj_pcapng_option_code = hf_pcapng_option_code_section_header;
vals = option_code_section_header_vals;
break;
case BLOCK_TYPE_IDB:
hfj_pcapng_option_code = hf_pcapng_option_code_interface_description;
vals = option_code_interface_description_vals;
break;
case BLOCK_TYPE_EPB:
hfj_pcapng_option_code = hf_pcapng_option_code_enhanced_packet;
vals = option_code_enhanced_packet_vals;
break;
case BLOCK_TYPE_PB:
hfj_pcapng_option_code = hf_pcapng_option_code_packet;
vals = option_code_packet_vals;
break;
case BLOCK_TYPE_NRB:
hfj_pcapng_option_code = hf_pcapng_option_code_name_resolution;
vals = option_code_name_resolution_vals;
break;
case BLOCK_TYPE_ISB:
hfj_pcapng_option_code = hf_pcapng_option_code_interface_statistics;
vals = option_code_interface_statistics_vals;
break;
default:
/* Use and handling we have for a local lock type */
if (p_local_block_callback) {
hfj_pcapng_option_code = p_local_block_callback->option_root_hf;
vals = p_local_block_callback->option_vals;
}
else {
hfj_pcapng_option_code = hf_pcapng_option_code;
}
}
proto_tree_add_item_ret_uint(option_tree, hfj_pcapng_option_code, tvb, offset, 2, encoding, &option_code);
if (vals)
proto_item_append_text(option_item, ": %s", val_to_str_const(option_code, vals, "Unknown"));
offset += 2;
option_length_item = proto_tree_add_item_ret_uint(option_tree, hf_pcapng_option_length, tvb, offset, 2, encoding, &option_length);
offset += 2;
if (option_code == 0) {
if (option_length != 0)
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
proto_item_set_len(option_item, option_length + 2 * 2);
break;
} else if (option_code == 1) {
proto_tree_add_item_ret_display_string(option_tree, hf_pcapng_option_data_comment, tvb, offset, option_length, ENC_NA | ENC_UTF_8, pinfo->pool, &str);
proto_item_append_text(option_item, " = %s", str);
offset += option_length;
} else if (option_code == 2988 || option_code == 2989 || option_code == 19372 || option_code == 19373) {
dissect_custom_options(option_tree, pinfo, tvb, offset, option_code, option_length, encoding);
offset += option_length;
} else switch (block_type) {
case BLOCK_TYPE_SHB:
switch (option_code) {
case 2:
proto_tree_add_item_ret_display_string(option_tree, hf_pcapng_option_data_section_header_hardware, tvb, offset, option_length, ENC_NA | ENC_UTF_8, pinfo->pool, &str);
proto_item_append_text(option_item, " = %s", str);
offset += option_length;
break;
case 3:
proto_tree_add_item_ret_display_string(option_tree, hf_pcapng_option_data_section_header_os, tvb, offset, option_length, ENC_NA | ENC_UTF_8, pinfo->pool, &str);
proto_item_append_text(option_item, " = %s", str);
offset += option_length;
break;
case 4:
proto_tree_add_item_ret_display_string(option_tree, hf_pcapng_option_data_section_header_user_application, tvb, offset, option_length, ENC_NA | ENC_UTF_8, pinfo->pool, &str);
proto_item_append_text(option_item, " = %s", 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_TYPE_IDB: {
struct interface_description *interface_description = (struct interface_description *) user_data;
switch (option_code) {
case 2:
proto_tree_add_item_ret_display_string(option_tree, hf_pcapng_option_data_interface_description_name, tvb, offset, option_length, ENC_NA | ENC_UTF_8, pinfo->pool, &str);
proto_item_append_text(option_item, " = %s", str);
offset += option_length;
break;
case 3:
proto_tree_add_item_ret_display_string(option_tree, hf_pcapng_option_data_interface_description_description, tvb, offset, option_length, ENC_NA | ENC_UTF_8, pinfo->pool, &str);
proto_item_append_text(option_item, " = %s", str);
offset += option_length;
break;
case 4:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_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;
proto_item_append_text(option_item, " = %s/%s",
address_to_display(pinfo->pool, &addr),
address_to_display(pinfo->pool, &addr_mask));
break;
case 5:
if (option_length != 17) {
expert_add_info(pinfo, option_length_item, &ei_invalid_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_ret_uint(option_tree, hf_pcapng_option_data_ipv6_mask, tvb, offset, 1, ENC_NA, &value_u32);
offset += 1;
proto_item_append_text(option_item, " = %s/%u",
address_to_display(pinfo->pool, &addr), value_u32);
break;
case 6:
if (option_length != 6) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
proto_tree_add_item(option_tree, hf_pcapng_option_data_mac_address, tvb, offset, 6, encoding);
proto_item_append_text(option_item, " = %s",
tvb_get_ether_name(tvb, offset));
offset += 6;
break;
case 7:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_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;
proto_item_append_text(option_item, " = %s",
address_to_display(pinfo->pool, &addr));
break;
case 8:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
p_item = proto_tree_add_item_ret_uint64(option_tree, hf_pcapng_option_data_interface_speed, tvb, offset, 8, encoding, &value_u64);
/* XXX - is there a general routine to do this mapping? */
if (value_u64 == 10000000) {
const_str = "10 Mbps";
} else if (value_u64 == 100000000) {
const_str = "100 Mbps";
} else if (value_u64 == 1000000000) {
const_str = "1 Gbps";
} else {
const_str = wmem_strdup_printf(pinfo->pool, "%"PRIu64, value_u64);
}
proto_item_append_text(p_item, "%s", const_str);
proto_item_append_text(option_item, " = %s", const_str);
offset += 8;
break;
case 9:
{
uint32_t base;
uint32_t exponent;
uint32_t i;
uint64_t resolution;
if (option_length != 1) {
expert_add_info(pinfo, option_length_item, &ei_invalid_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_uint8(tvb, offset);
offset += 1;
if (value_u8 & 0x80) {
base = 2;
} else {
base = 10;
}
exponent = value_u8 & 0x7F;
strbuf = wmem_strbuf_new(pinfo->pool, "");
wmem_strbuf_append_printf(strbuf, "%u^-%u", base, exponent);
resolution = 1;
for (i = 0; i < exponent; i += 1)
resolution *= base;
if (interface_description) {
interface_description->timestamp_resolution = resolution;
}
switch (resolution) {
case 0:
/* Overflow */
wmem_strbuf_append(strbuf, " (overflow)");
break;
case 1:
wmem_strbuf_append(strbuf, " (seconds)");
break;
case 10:
wmem_strbuf_append(strbuf, " (.1 seconds)");
break;
case 100:
wmem_strbuf_append(strbuf, " (.01 seconds)");
break;
case 1000:
wmem_strbuf_append(strbuf, " (milliseconds)");
break;
case 10000:
wmem_strbuf_append(strbuf, " (.1 milliseconds)");
break;
case 100000:
wmem_strbuf_append(strbuf, " (.01 milliseconds)");
break;
case 1000000:
wmem_strbuf_append(strbuf, " (microseconds)");
break;
case 10000000:
wmem_strbuf_append(strbuf, " (.1 microseconds)");
break;
case 100000000:
wmem_strbuf_append(strbuf, " (.01 microseconds)");
break;
case 1000000000:
wmem_strbuf_append(strbuf, " (nanoseconds)");
break;
case 10000000000:
wmem_strbuf_append(strbuf, " (.1 nanoseconds)");
break;
case 100000000000:
wmem_strbuf_append(strbuf, " (.01 nanoseconds)");
break;
case 1000000000000:
wmem_strbuf_append(strbuf, " (picoseconds)");
break;
case 10000000000000:
wmem_strbuf_append(strbuf, " (.1 picoseconds)");
break;
case 100000000000000:
wmem_strbuf_append(strbuf, " (.01 picoseconds)");
break;
}
proto_item_append_text(option_item, " = %s",
wmem_strbuf_finalize(strbuf));
break;
}
case 10:
if (option_length != 4) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
/* TODO: Better timezone decoding */
proto_tree_add_item_ret_uint(option_tree, hf_pcapng_option_data_interface_timezone, tvb, offset, 4, encoding, &value_u32);
offset += 4;
proto_item_append_text(option_item, " = %u", value_u32);
break;
case 11:
if (option_length == 0) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
break;
}
/* Get filter type (0 is libpcap, 1 is BPF program, others are unspecified.) */
proto_tree_add_item_ret_uint(option_tree, hf_pcapng_option_data_interface_filter_type, tvb, offset, 1, ENC_NA, &if_filter_type);
offset++;
switch (if_filter_type) {
case 0:
proto_tree_add_item_ret_display_string(option_tree, hf_pcapng_option_data_interface_filter_string, tvb, offset, option_length - 1, ENC_NA | ENC_UTF_8, pinfo->pool, &str);
proto_item_append_text(option_item, " = %s", str);
break;
case 1:
proto_tree_add_item(option_tree, hf_pcapng_option_data_interface_filter_bpf_program, tvb, offset, option_length - 1, ENC_NA);
proto_item_append_text(option_item, " = {BPF program}");
break;
default:
proto_tree_add_item(option_tree, hf_pcapng_option_data_interface_filter_unknown, tvb, offset, option_length - 1, ENC_NA);
proto_item_append_text(option_item, " = unknown (type %u)", if_filter_type);
break;
}
offset += option_length - 1;
break;
case 12:
proto_tree_add_item_ret_display_string(option_tree, hf_pcapng_option_data_interface_os, tvb, offset, option_length, ENC_NA | ENC_UTF_8, pinfo->pool, &str);
proto_item_append_text(option_item, " = %s", str);
offset += option_length;
break;
case 13:
if (option_length != 1) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
proto_tree_add_item_ret_uint(option_tree, hf_pcapng_option_data_interface_fcs_length, tvb, offset, 1, ENC_NA, &value_u32);
offset += 1;
proto_item_append_text(option_item, " = %u", value_u32);
break;
case 14:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
proto_tree_add_item_ret_uint64(option_tree, hf_pcapng_option_data_interface_timestamp_offset, tvb, offset, 8, encoding, &value_u64);
offset += 8;
proto_item_append_text(option_item, " = %"PRIu64, value_u64);
if (interface_description) {
interface_description->timestamp_offset = value_u64;
}
break;
case 15:
proto_tree_add_item_ret_display_string(option_tree, hf_pcapng_option_data_interface_hardware, tvb, offset, option_length, ENC_NA | ENC_UTF_8, pinfo->pool, &str);
proto_item_append_text(option_item, " = %s", 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_TYPE_PB:
switch (option_code) {
case 2:
if (option_length != 4) {
expert_add_info(pinfo, option_length_item, &ei_invalid_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 3:
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_TYPE_NRB:
switch (option_code) {
case 2:
proto_tree_add_item_ret_display_string(option_tree, hf_pcapng_option_data_dns_name, tvb, offset, option_length, ENC_NA | ENC_UTF_8, pinfo->pool, &str);
proto_item_append_text(option_item, " = %s", str);
offset += option_length;
break;
case 3:
if (option_length != 4) {
expert_add_info(pinfo, option_length_item, &ei_invalid_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_item_append_text(option_item, " = %s",
address_to_display(pinfo->pool, &addr));
break;
case 4:
if (option_length != 16) {
expert_add_info(pinfo, option_length_item, &ei_invalid_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_item_append_text(option_item, " = %s",
address_to_display(pinfo->pool, &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_TYPE_ISB:
switch (option_code) {
case 2:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_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 3:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_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 4:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
proto_tree_add_item_ret_uint64(option_tree, hf_pcapng_option_data_interface_received, tvb, offset, 8, encoding, &value_u64);
proto_item_append_text(option_item, " = %"PRIu64, value_u64);
offset += 8;
break;
case 5:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
proto_tree_add_item_ret_uint64(option_tree, hf_pcapng_option_data_interface_dropped, tvb, offset, 8, encoding, &value_u64);
proto_item_append_text(option_item, " = %"PRIu64, value_u64);
offset += 8;
break;
case 6:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
proto_tree_add_item_ret_uint64(option_tree, hf_pcapng_option_data_interface_accepted_by_filter, tvb, offset, 8, encoding, &value_u64);
proto_item_append_text(option_item, " = %"PRIu64, value_u64);
offset += 8;
break;
case 7:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
proto_tree_add_item_ret_uint64(option_tree, hf_pcapng_option_data_interface_dropped_by_os, tvb, offset, 8, encoding, &value_u64);
proto_item_append_text(option_item, " = %"PRIu64, value_u64);
offset += 8;
break;
case 8:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
proto_tree_add_item_ret_uint64(option_tree, hf_pcapng_option_data_interface_delivered_to_user, tvb, offset, 8, encoding, &value_u64);
proto_item_append_text(option_item, " = %"PRIu64, 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_TYPE_EPB:
switch (option_code) {
case 2:
if (option_length != 4) {
expert_add_info(pinfo, option_length_item, &ei_invalid_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 3:
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 4:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
proto_tree_add_item_ret_uint64(option_tree, hf_pcapng_option_data_packet_drop_count, tvb, offset, 8, encoding, &value_u64);
proto_item_append_text(option_item, " = %"PRIu64, value_u64);
offset += 8;
break;
case 5:
if (option_length != 8) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
proto_tree_add_item_ret_uint64(option_tree, hf_pcapng_option_data_packet_id, tvb, offset, 8, encoding, &value_u64);
proto_item_append_text(option_item, " = 0x%016"PRIx64, value_u64);
offset += 8;
break;
case 6:
if (option_length != 4) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
offset += option_length;
break;
}
proto_tree_add_item_ret_uint(option_tree, hf_pcapng_option_data_packet_queue, tvb, offset, 4, encoding, &value_u32);
proto_item_append_text(option_item, " = %u", value_u32);
offset += 4;
break;
case 7:
if (option_length < 1) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
break;
}
switch (tvb_get_uint8(tvb, offset)) {
case 1:
case 2:
if (option_length != 9) {
expert_add_info(pinfo, option_length_item, &ei_invalid_option_length);
}
break;
default:
break;
}
proto_tree_add_item(option_tree, hf_pcapng_option_data_packet_verdict_type, tvb, offset, 1, ENC_NA);
if (option_length > 1)
proto_tree_add_item(option_tree, hf_pcapng_option_data_packet_verdict_data, tvb, offset + 1, option_length - 1, ENC_NA);
offset += option_length;
break;
case 32769: /* Darwin DPEB ID */
proto_tree_add_item_ret_uint(option_tree, hf_pcapng_option_data_packet_darwin_dpeb_id, tvb, offset, option_length, encoding, &value_u32);
offset += option_length;
proto_item_append_text(option_item, " = %u", value_u32);
break;
case 32770: /* Darwin Service Type */
proto_tree_add_item_ret_uint(option_tree, hf_pcapng_option_data_packet_darwin_svc_class, tvb, offset, option_length, encoding, &value_u32);
offset += option_length;
proto_item_append_text(option_item, " = %s", val_to_str_const(value_u32, option_code_darwin_svc_class_vals, "Unknown"));
break;
case 32771: /* Darwin Effective DPEB ID */
proto_tree_add_item_ret_uint(option_tree, hf_pcapng_option_data_packet_darwin_edpeb_id, tvb, offset, option_length, encoding, &value_u32);
offset += option_length;
proto_item_append_text(option_item, " = %u", value_u32);
break;
case 32772: /* Darwin Flags */
proto_tree_add_bitmask(option_tree, tvb, offset, hf_pcapng_option_data_packet_darwin_flags, ett_pcapng_option, hfx_pcapng_option_data_packet_darwin_flags, encoding);
offset += option_length;
break;
case 32773: /* Darwin Flow ID */
proto_tree_add_item_ret_uint(option_tree, hf_pcapng_option_data_packet_darwin_flow_id, tvb, offset, option_length, encoding, &value_u32);
offset += option_length;
proto_item_append_text(option_item, " = %u", value_u32);
break;
default:
proto_tree_add_item(option_tree, hf_pcapng_option_data, tvb, offset, option_length, ENC_NA);
offset += option_length;
}
break;
default:
/* Use local block handling if available */
if (p_local_block_callback) {
p_local_block_callback->option_dissector(option_tree, option_item, pinfo, tvb, offset,
hf_pcapng_option_data, option_code, option_length, encoding);
}
else {
proto_tree_add_item(option_tree, hf_pcapng_option_data, tvb, offset, option_length, ENC_NA);
}
offset += option_length;
}
/* Pad this option out to next 4 bytes */
if ((option_length % 4) != 0) {
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;
} else
proto_item_set_len(option_item, option_length + 2 * 2);
}
proto_item_set_end(options_item, tvb, offset);
return offset;
}
static void
pcapng_add_timestamp(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
int offset, unsigned encoding,
struct interface_description *interface_description)
{
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_description != NULL) {
nstime_t timestamp;
uint64_t ts;
proto_item *ti;
ts = ((uint64_t)(tvb_get_uint32(tvb, offset, encoding))) << 32 |
tvb_get_uint32(tvb, offset + 4, encoding);
ts += interface_description->timestamp_offset;
if (interface_description->timestamp_resolution == 0) {
/* This overflowed, so we can't calculate the time stamp */
pinfo->presence_flags &= ~PINFO_HAS_TS;
} else {
timestamp.secs = (time_t)(ts / interface_description->timestamp_resolution);
timestamp.nsecs = (int)(((ts % interface_description->timestamp_resolution) * 1000000000) / interface_description->timestamp_resolution);
ti = proto_tree_add_time(tree, hf_pcapng_timestamp, tvb, offset, 8, ×tamp);
proto_item_set_generated(ti);
pinfo->abs_ts = timestamp;
}
}
}
static struct interface_description *
get_interface_description(struct info *info, unsigned interface_id,
packet_info *pinfo, proto_tree *tree)
{
if (interface_id >= wmem_array_get_count(info->interfaces)) {
expert_add_info(pinfo, tree, &ei_missing_idb);
return NULL;
}
return (struct interface_description *) wmem_array_index(info->interfaces, interface_id);
}
/*
* This is tricky - for most blocks, we can dissect this first, but, for
* a Section Header Block, we must dissect it *after* determining the
* byte order.
*
* So we extract it into a routine and call it at the appropriate time.
*/
static tvbuff_t *
process_block_length(proto_tree *block_tree, packet_info *pinfo,
tvbuff_t *tvb, int offset, proto_tree **block_data_tree_p,
proto_item **block_length_item_p, uint32_t *block_length_p,
unsigned encoding)
{
proto_item *block_data_item;
uint32_t block_data_length;
*block_length_item_p = proto_tree_add_item_ret_uint(block_tree, hf_pcapng_block_length, tvb, offset, 4, encoding, block_length_p);
if (*block_length_p < 3*4) {
expert_add_info(pinfo, *block_length_item_p, &ei_block_length_below_block_minimum);
return NULL;
}
/*
* To quote the current pcapng spec, "Block Total Length (32 bits) ...
* This value MUST be a multiple of 4."
*/
if ((*block_length_p % 4) != 0) {
expert_add_info(pinfo, *block_length_item_p, &ei_block_length_not_multiple_of_4);
return NULL;
}
/*
* Subtract the per-block overhead (block type, block length, trailing
* block length) to give the length of the block data.
* block.
*/
block_data_length = *block_length_p - 3*4;
/*
* Now that we know the block data length, create an item for its
* tree, and provide the tree to our caller.
*/
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_p = proto_item_add_subtree(block_data_item, ett_pcapng_block_data);
/*
* Create a tvbuff for the block data, and provide it to our caller.
*/
return tvb_new_subset_length(tvb, offset, block_data_length);
}
static bool
dissect_shb_data(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
bool byte_order_magic_bad, block_data_arg *argp)
{
int offset = 0;
proto_item *byte_order_magic_item;
byte_order_magic_item = proto_tree_add_item(tree, hf_pcapng_section_header_byte_order_magic, tvb, offset, 4, ENC_NA);
if (byte_order_magic_bad) {
expert_add_info(pinfo, byte_order_magic_item, &ei_invalid_byte_order_magic);
return false;
}
if (argp->info->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(tree, hf_pcapng_section_header_major_version, tvb, offset, 2, argp->info->encoding);
offset += 2;
proto_tree_add_item(tree, hf_pcapng_section_header_minor_version, tvb, offset, 2, argp->info->encoding);
offset += 2;
proto_tree_add_item(tree, hf_pcapng_section_header_section_length, tvb, offset, 8, argp->info->encoding);
offset += 8;
dissect_options(tree, pinfo, BLOCK_TYPE_SHB, tvb, offset, argp->info->encoding, NULL);
return true;
}
static void
dissect_idb_data(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
block_data_arg *argp)
{
int offset = 0;
struct interface_description interface_description;
memset(&interface_description, 0, sizeof(struct interface_description));
interface_description.timestamp_resolution = 1000000; /* 1 microsecond resolution is the default */
proto_item_append_text(argp->block_item, " %u", argp->info->interface_number);
argp->info->interface_number += 1;
proto_tree_add_item(tree, hf_pcapng_interface_description_link_type, tvb, offset, 2, argp->info->encoding);
interface_description.link_type = tvb_get_uint16(tvb, offset, argp->info->encoding);
offset += 2;
proto_tree_add_item(tree, hf_pcapng_interface_description_reserved, tvb, offset, 2, argp->info->encoding);
offset += 2;
proto_tree_add_item(tree, hf_pcapng_interface_description_snap_length, tvb, offset, 4, argp->info->encoding);
interface_description.snap_len = tvb_get_uint32(tvb, offset, argp->info->encoding);
offset += 4;
dissect_options(tree, pinfo, BLOCK_TYPE_IDB, tvb, offset, argp->info->encoding, &interface_description);
wmem_array_append_one(argp->info->interfaces, interface_description);
}
static void
dissect_pb_data(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
block_data_arg *argp)
{
volatile int offset = 0;
uint32_t interface_id;
struct interface_description *interface_description;
uint32_t captured_length;
uint32_t original_length;
proto_item *packet_data_item;
proto_item_append_text(argp->block_item, " %u", argp->info->frame_number);
proto_tree_add_item(tree, hf_pcapng_packet_block_interface_id, tvb, offset, 2, argp->info->encoding);
interface_id = tvb_get_uint16(tvb, offset, argp->info->encoding);
offset += 2;
interface_description = get_interface_description(argp->info, interface_id,
pinfo, argp->block_tree);
proto_tree_add_item(tree, hf_pcapng_packet_block_drops_count, tvb, offset, 2, argp->info->encoding);
offset += 2;
pcapng_add_timestamp(tree, pinfo, tvb, offset, argp->info->encoding, interface_description);
offset += 8;
proto_tree_add_item_ret_uint(tree, hf_pcapng_captured_length, tvb, offset, 4, argp->info->encoding, &captured_length);
offset += 4;
proto_tree_add_item_ret_uint(tree, hf_pcapng_original_length, tvb, offset, 4, argp->info->encoding, &original_length);
offset += 4;
packet_data_item = proto_tree_add_item(tree, hf_pcapng_packet_data, tvb, offset, captured_length, argp->info->encoding);
if (pref_dissect_next_layer && interface_description != NULL) {
proto_tree *packet_data_tree = proto_item_add_subtree(packet_data_item, ett_pcapng_packet_data);
pinfo->num = argp->info->frame_number;
TRY {
call_dissector_with_data(pcap_pktdata_handle, tvb_new_subset_length_caplen(tvb, offset, captured_length, original_length),
pinfo, packet_data_tree, &interface_description->link_type);
}
CATCH_BOUNDS_ERRORS {
show_exception(tvb, pinfo, packet_data_tree, EXCEPT_CODE, GET_MESSAGE);
}
ENDTRY;
}
argp->info->frame_number += 1;
offset += captured_length;
if (captured_length % 4) {
proto_tree_add_item(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);
}
dissect_options(tree, pinfo, BLOCK_TYPE_PB, tvb, offset, argp->info->encoding, NULL);
}
static void
dissect_spb_data(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
block_data_arg *argp)
{
volatile int offset = 0;
struct interface_description *interface_description;
proto_item *ti;
volatile uint32_t captured_length;
uint32_t original_length;
proto_item *packet_data_item;
interface_description = get_interface_description(argp->info, 0,
pinfo, argp->block_tree);
proto_item_append_text(argp->block_item, " %u", argp->info->frame_number);
proto_tree_add_item_ret_uint(tree, hf_pcapng_original_length, tvb, offset, 4, argp->info->encoding, &original_length);
offset += 4;
captured_length = original_length;
if (interface_description && interface_description->snap_len != 0) {
captured_length = MIN(original_length, interface_description->snap_len);
}
ti = proto_tree_add_uint(tree, hf_pcapng_captured_length, tvb, 0, 0, captured_length);
proto_item_set_generated(ti);
packet_data_item = proto_tree_add_item(tree, hf_pcapng_packet_data, tvb, offset, captured_length, argp->info->encoding);
if (pref_dissect_next_layer && interface_description != NULL) {
proto_tree *packet_data_tree = proto_item_add_subtree(packet_data_item, ett_pcapng_packet_data);
pinfo->num = argp->info->frame_number;
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;
}
argp->info->frame_number += 1;
offset += captured_length;
if (captured_length % 4) {
proto_tree_add_item(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);
}
}
static void
dissect_nrb_data(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
block_data_arg *argp)
{
int offset = 0;
proto_tree *records_tree;
proto_item *records_item;
proto_tree *record_tree;
proto_item *record_item;
proto_item *record_length_item;
int offset_string_start;
uint32_t record_code;
uint32_t record_length;
int string_length;
char *str = NULL;
address addr;
records_item = proto_tree_add_item(tree, hf_pcapng_records, tvb, offset, -1, ENC_NA);
records_tree = proto_item_add_subtree(records_item, ett_pcapng_records);
while (tvb_reported_length_remaining(tvb, offset) > 0) {
record_item = proto_tree_add_item(records_tree, hf_pcapng_record, tvb, offset, -1, ENC_NA);
record_tree = proto_item_add_subtree(record_item, ett_pcapng_record);
proto_tree_add_item_ret_uint(record_tree, hf_pcapng_record_code, tvb, offset, 2, argp->info->encoding, &record_code);
proto_item_append_text(record_item, ": %s", val_to_str_const(record_code, record_code_vals, "Unknown"));
offset += 2;
record_length_item = proto_tree_add_item_ret_uint(record_tree, hf_pcapng_record_length, tvb, offset, 2, argp->info->encoding, &record_length);
offset += 2;
if (record_code == 0) {
if (record_length != 0)
expert_add_info(pinfo, record_length_item, &ei_invalid_record_length);
proto_item_set_len(record_item, record_length + 2 * 2);
break;
} else switch (record_code) {
case 0x0001: /* IPv4 Record */
if (record_length < 5) {
expert_add_info(pinfo, record_length_item, &ei_invalid_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 ((unsigned)(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, argp->info->encoding);
offset += string_length + 1;
} else {
/*
* XXX - flag with an error, as this means we didn't
* see a terminating NUL, but the spec says "zero
* or more zero-terminated UTF-8 strings containing
* the DNS entries for that address".
*/
proto_tree_add_item(record_tree, hf_pcapng_record_data, tvb, offset, (record_length - 4) - (offset - offset_string_start), argp->info->encoding);
offset += (record_length - 4) - (offset - offset_string_start);
}
}
str = address_to_display(pinfo->pool, &addr);
break;
case 0x0002: /* IPv6 Record */
if (record_length < 17) {
expert_add_info(pinfo, record_length_item, &ei_invalid_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 ((unsigned)(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, argp->info->encoding);
offset += string_length + 1;
} else {
/*
* XXX - flag with an error, as this means we didn't
* see a terminating NUL, but the spec says "zero
* or more zero-terminated UTF-8 strings containing
* the DNS entries for that address".
*/
proto_tree_add_item(record_tree, hf_pcapng_record_data, tvb, offset, (record_length - 16) - (offset - offset_string_start), argp->info->encoding);
offset += (record_length - 16) - (offset - offset_string_start);
}
}
str = address_to_display(pinfo->pool, &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;
} else
proto_item_set_len(record_item, record_length + 2 * 2);
if (str)
proto_item_append_text(record_item, " = %s", str);
}
proto_item_set_end(records_item, tvb, offset);
dissect_options(tree, pinfo, BLOCK_TYPE_NRB, tvb, offset, argp->info->encoding, NULL);
}
static void
dissect_isb_data(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
block_data_arg *argp)
{
int offset = 0;
uint32_t interface_id;
struct interface_description *interface_description;
proto_tree_add_item(tree, hf_pcapng_interface_id, tvb, offset, 4, argp->info->encoding);
interface_id = tvb_get_uint32(tvb, offset, argp->info->encoding);
offset += 4;
interface_description = get_interface_description(argp->info, interface_id,
pinfo, argp->block_tree);
pcapng_add_timestamp(tree, pinfo, tvb, offset, argp->info->encoding, interface_description);
offset += 8;
dissect_options(tree, pinfo, BLOCK_TYPE_ISB, tvb, offset, argp->info->encoding, NULL);
}
static void
dissect_epb_data(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
block_data_arg *argp)
{
volatile int offset = 0;
uint32_t interface_id;
struct interface_description *interface_description;
uint32_t captured_length;
uint32_t original_length;
proto_item *packet_data_item;
proto_item_append_text(argp->block_item, " %u", argp->info->frame_number);
proto_tree_add_item(tree, hf_pcapng_interface_id, tvb, offset, 4, argp->info->encoding);
interface_id = tvb_get_uint32(tvb, offset, argp->info->encoding);
offset += 4;
interface_description = get_interface_description(argp->info, interface_id,
pinfo, argp->block_tree);
pcapng_add_timestamp(tree, pinfo, tvb, offset, argp->info->encoding, interface_description);
offset += 8;
proto_tree_add_item_ret_uint(tree, hf_pcapng_captured_length, tvb, offset, 4, argp->info->encoding, &captured_length);
offset += 4;
proto_tree_add_item_ret_uint(tree, hf_pcapng_original_length, tvb, offset, 4, argp->info->encoding, &original_length);
offset += 4;
packet_data_item = proto_tree_add_item(tree, hf_pcapng_packet_data, tvb, offset, captured_length, argp->info->encoding);
if (pref_dissect_next_layer && interface_description != NULL) {
proto_tree *packet_data_tree = proto_item_add_subtree(packet_data_item, ett_pcapng_packet_data);
pinfo->num = argp->info->frame_number;
TRY {
call_dissector_with_data(pcap_pktdata_handle, tvb_new_subset_length_caplen(tvb, offset, captured_length, original_length),
pinfo, packet_data_tree, &interface_description->link_type);
}
CATCH_BOUNDS_ERRORS {
show_exception(tvb, pinfo, packet_data_tree, EXCEPT_CODE, GET_MESSAGE);
}
ENDTRY;
}
argp->info->frame_number += 1;
offset += captured_length;
if (captured_length % 4) {
proto_tree_add_item(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);
}
dissect_options(tree, pinfo, BLOCK_TYPE_EPB, tvb, offset, argp->info->encoding, NULL);
}
static void
dissect_dsb_data(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
block_data_arg *argp)
{
int offset = 0;
uint32_t secrets_length;
proto_tree_add_item(tree, hf_pcapng_dsb_secrets_type, tvb, offset, 4, argp->info->encoding);
offset += 4;
proto_tree_add_item_ret_uint(tree, hf_pcapng_dsb_secrets_length, tvb, offset, 4, argp->info->encoding, &secrets_length);
offset += 4;
proto_tree_add_item(tree, hf_pcapng_dsb_secrets_data, tvb, offset, secrets_length, argp->info->encoding);
offset += secrets_length;
uint32_t padlen = (4 - (secrets_length & 3)) & 3;
if (padlen) {
proto_tree_add_item(tree, hf_pcapng_record_padding, tvb, offset, padlen, ENC_NA);
offset += padlen;
}
dissect_options(tree, pinfo, BLOCK_TYPE_DSB, tvb, offset, argp->info->encoding, NULL);
}
static void
dissect_cb_data(proto_tree *tree, packet_info *pinfo _U_, tvbuff_t *tvb,
block_data_arg *argp)
{
int offset = 0;
proto_tree_add_item(tree, hf_pcapng_cb_pen, tvb, offset, 4, argp->info->encoding);
offset += 4;
/* Todo: Add known PEN custom data dissection. */
proto_tree_add_item(tree, hf_pcapng_cb_data, tvb, offset, tvb_reported_length(tvb) - offset, argp->info->encoding);
/*
* The pcapng spec does not tell the size of the custom data without knowing the data content,
* so it's not possible to dissect options.
*
* dissect_options(tree, pinfo, BLOCK_CB_COPY, tvb, offset, argp->info->encoding, NULL);
*/
}
#define BLOCK_BAD_SHB_SIZE 12
int dissect_block(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, struct info *info)
{
proto_tree *block_tree, *block_type_tree;
proto_item *block_item, *block_type_item;
proto_tree *block_data_tree;
proto_item *block_length_item;
proto_item *block_length_trailer_item;
int offset = 0;
uint32_t block_type;
uint32_t block_length, block_length_trailer;
uint32_t length;
tvbuff_t *volatile next_tvb = NULL;
block_data_arg arg;
volatile bool stop_dissecting = false;
volatile bool byte_order_magic_bad = false;
block_type = tvb_get_uint32(tvb, offset + 0, info->encoding);
length = tvb_get_uint32(tvb, offset + 4, info->encoding);
/* Lookup handlers for known local block type */
local_block_callback_info_t *volatile p_local_block_callback = NULL;
if (block_type >= 0x80000000) {
p_local_block_callback = (local_block_callback_info_t*)g_hash_table_lookup(s_local_block_callback_table, GUINT_TO_POINTER(block_type));
}
/* Create block tree */
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);
/* Block type */
block_type_item = proto_tree_add_item(block_tree, hf_pcapng_block_type, tvb, offset, 4, info->encoding);
block_type_tree = proto_item_add_subtree(block_type_item, ett_pcapng_block_type);
proto_tree_add_item(block_type_tree, hf_pcapng_block_type_vendor, tvb, offset, 4, info->encoding);
proto_item *block_type_value_item = proto_tree_add_item(block_type_tree, hf_pcapng_block_type_value, tvb, offset, 4, info->encoding);
offset += 4;
/* Name is either from local 'name', or from fixed block_type_vals */
if (p_local_block_callback) {
proto_item_append_text(block_item, " %u: %s", info->block_number, p_local_block_callback->name);
proto_item_append_text(block_type_item, ": (%s)", p_local_block_callback->name);
proto_item_append_text(block_type_value_item, ": (%s)", p_local_block_callback->name);
}
else {
proto_item_append_text(block_item, " %u: %s", info->block_number, val_to_str_const(block_type, block_type_vals, "Unknown"));
proto_item_append_text(block_type_item, ": (%s)", val_to_str_const(block_type, block_type_vals, "Unknown"));
proto_item_append_text(block_type_value_item, ": (%s)", val_to_str_const(block_type, block_type_vals, "Unknown"));
}
info->block_number += 1;
arg.block_item = block_item;
arg.block_tree = block_tree;
arg.info = info;
if (block_type == BLOCK_TYPE_SHB && tvb_captured_length(tvb) == BLOCK_BAD_SHB_SIZE) {
/*
* dissect_pcapng() gave us a short SHB because its byte-order magic is bad.
* process_block_length() would fail, so generate an abbreviated TVB
* to pass to dissect_shb_data() which will flag up the bad magic.
*/
byte_order_magic_bad = true;
next_tvb = tvb_new_subset_length(tvb, 8, 4);
block_data_tree = block_tree;
block_length_item = NULL;
}
else {
next_tvb = process_block_length(block_tree, pinfo, tvb, offset, &block_data_tree, &block_length_item, &block_length, info->encoding);
if (next_tvb == NULL) {
/* The length was invalid, so we can't dissect any further */
return -1;
}
}
offset += 4;
/*
* Dissect the block data.
* Catch exceptions; ReportedBoundsError means that the body
* doesn't fit in the block.
*/
TRY {
switch (block_type) {
case BLOCK_TYPE_SHB:
proto_item_append_text(block_item, " %u", info->section_number);
if (!dissect_shb_data(block_data_tree, pinfo, next_tvb, byte_order_magic_bad, &arg)) {
stop_dissecting = true;
}
break;
case BLOCK_TYPE_IDB:
dissect_idb_data(block_data_tree, pinfo, next_tvb, &arg);
break;
case BLOCK_TYPE_PB:
dissect_pb_data(block_data_tree, pinfo, next_tvb, &arg);
break;
case BLOCK_TYPE_SPB:
dissect_spb_data(block_data_tree, pinfo, next_tvb, &arg);
break;
case BLOCK_TYPE_NRB:
dissect_nrb_data(block_data_tree, pinfo, next_tvb, &arg);
break;
case BLOCK_TYPE_ISB:
dissect_isb_data(block_data_tree, pinfo, next_tvb, &arg);
break;
case BLOCK_TYPE_EPB:
dissect_epb_data(block_data_tree, pinfo, next_tvb, &arg);
break;
case BLOCK_TYPE_DSB:
dissect_dsb_data(block_data_tree, pinfo, next_tvb, &arg);
break;
case BLOCK_TYPE_CB_COPY:
case BLOCK_TYPE_CB_NO_COPY:
dissect_cb_data(block_data_tree, pinfo, next_tvb, &arg);
break;
case BLOCK_TYPE_IRIG_TS:
case BLOCK_TYPE_ARINC_429:
break;
default:
/* Use local block type handling if available */
if (p_local_block_callback) {
p_local_block_callback->dissector(block_data_tree, pinfo, next_tvb, &arg);
}
break;
}
}
CATCH(ReportedBoundsError) {
/*
* The body didn't fit in the block.
* Mark the length as being too small.
*/
expert_add_info(pinfo, block_length_item, &ei_block_length_below_block_content_length);
}
CATCH_ALL {
/*
* Just rethrow other exceptions to the ultimate handler.
*/
RETHROW;
}
ENDTRY;
if (stop_dissecting) {
/* We found a fatal problem with the file. */
return -1;
}
/*
* Skip past the block data.
*/
offset += tvb_reported_length(next_tvb);
block_length_trailer_item = proto_tree_add_item_ret_uint(block_tree, hf_pcapng_block_length_trailer, tvb, offset, 4, info->encoding, &block_length_trailer);
if (block_length != block_length_trailer)
expert_add_info(pinfo, block_length_trailer_item, &ei_block_lengths_dont_match);
offset += 4;
return offset;
}
#define BLOCK_TYPE_SIZE 4
static int
dissect_pcapng(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
static const uint8_t pcapng_premagic[BLOCK_TYPE_SIZE] = {
0x0A, 0x0D, 0x0D, 0x0A
};
int offset = 0;
uint32_t length;
uint32_t block_type;
proto_tree *main_tree;
proto_item *main_item;
struct info info;
volatile bool byte_order_magic_bad = false;
if (tvb_memeql(tvb, 0, pcapng_premagic, BLOCK_TYPE_SIZE) != 0)
return 0;
info.encoding = ENC_BIG_ENDIAN;
info.block_number = 1;
info.section_number = 0;
info.interface_number = 0;
info.darwin_process_event_number = 0;
info.frame_number = 1;
info.interfaces = NULL;
info.darwin_process_events = wmem_array_new(pinfo->pool, sizeof(struct darwin_process_event_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) > 8) {
tvbuff_t *next_tvb;
int block_length;
block_type = tvb_get_uint32(tvb, offset, info.encoding);
if (block_type == BLOCK_TYPE_SHB) {
info.section_number += 1;
info.interface_number = 0;
info.darwin_process_event_number = 0;
info.frame_number = 1;
if (info.interfaces != NULL) {
wmem_free(pinfo->pool, info.interfaces);
}
info.interfaces = wmem_array_new(pinfo->pool, sizeof(struct interface_description));
/* Byte order may change from that of previous SHB [#19371] */
if (tvb_memeql(tvb, offset + 8, pcapng_big_endian_magic, BYTE_ORDER_MAGIC_SIZE) == 0) {
info.encoding = ENC_BIG_ENDIAN;
} else if (tvb_memeql(tvb, offset + 8, pcapng_little_endian_magic, BYTE_ORDER_MAGIC_SIZE) == 0) {
info.encoding = ENC_LITTLE_ENDIAN;
} else {
byte_order_magic_bad = true;
if (offset == 0) {
return 0;
}
}
}
if (G_UNLIKELY(byte_order_magic_bad)) {
/* Pass a shortened TVB that's just big enough to let
* dissect_block() mark the SHB's byte order magic as bad.
*/
length = BLOCK_BAD_SHB_SIZE;
}
else {
length = tvb_get_uint32(tvb, offset + 4, info.encoding);
}
next_tvb = tvb_new_subset_length(tvb, offset, length);
block_length = dissect_block(main_tree, pinfo, next_tvb, &info);
if (block_length == -1) {
/* Fatal error. */
break;
}
offset += block_length;
}
return offset;
}
static void pcapng_shutdown_protocol(void)
{
/* Create table for local block dissectors */
g_hash_table_destroy(s_local_block_callback_table);
s_local_block_callback_table = NULL;
}
static bool
dissect_pcapng_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
return dissect_pcapng(tvb, pinfo, tree, data) > 0;
}
/* Expected to be called by an external dissector. For an in-tree example, please see file-pcap-darwin.c */
void register_pcapng_local_block_dissector(uint32_t block_number, local_block_callback_info_t *block_callback_info)
{
/* Add this entry into table. */
g_hash_table_insert(s_local_block_callback_table, GUINT_TO_POINTER(block_number), block_callback_info);
}
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, NULL, 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, NULL, 0x7FFFFFFF,
NULL, HFILL }
},
{ &hf_pcapng_block_length,
{ "Block Length", "pcapng.block.length",
FT_UINT32, BASE_DEC, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_block_length_trailer,
{ "Block Length (trailer)", "pcapng.block.length_trailer",
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_UINT16, 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, BASE_NONE, 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, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_section_header_os,
{ "OS", "pcapng.options.option.data.os",
FT_STRING, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_section_header_user_application,
{ "User Application", "pcapng.options.option.data.user_application",
FT_STRING, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_interface_description_name,
{ "Name", "pcapng.options.option.data.interface.name",
FT_STRING, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_interface_description_description,
{ "Description", "pcapng.options.option.data.interface.description",
FT_STRING, BASE_NONE, 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_type,
{ "Filter type", "pcapng.options.option.data.interface.filter.type",
FT_UINT8, BASE_DEC, VALS(interface_filter_type_vals), 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_interface_filter_string,
{ "Filter string", "pcapng.options.option.data.interface.filter.string",
FT_STRING, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_interface_filter_bpf_program,
{ "Filter BPF program", "pcapng.options.option.data.interface.filter.bpf_program",
FT_NONE, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_interface_filter_unknown,
{ "Filter data", "pcapng.options.option.data.interface.filter.unknown",
FT_NONE, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_interface_os,
{ "OS", "pcapng.options.option.data.interface.os",
FT_STRING, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_interface_hardware,
{ "Hardware", "pcapng.options.option.data.interface.hardware",
FT_STRING, BASE_NONE, 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_verdict_type,
{ "Verdict type", "pcapng.options.option.data.packet.verdict.type",
FT_UINT8, BASE_DEC, VALS(packet_verdict_type_vals), 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_verdict_data,
{ "Verdict data", "pcapng.options.option.data.packet.verdict.data",
FT_BYTES, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_queue,
{ "Queue", "pcapng.options.option.data.packet.queue",
FT_UINT32, BASE_DEC, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_id,
{ "Packet ID", "pcapng.options.option.data.packet.id",
FT_UINT64, BASE_HEX, 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_DEC, 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, 0x4000,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_flags_link_layer_errors_start_frame_delimiter,
{ "Start Frame Delimiter Error", "pcapng.options.option.data.packet.flags.link_layer_errors.start_frame_delimiter",
FT_BOOLEAN, 16, NULL, 0x2000,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_flags_link_layer_errors_unaligned_frame,
{ "Unaligned Frame Error", "pcapng.options.option.data.packet.flags.link_layer_errors.unaligned_frame",
FT_BOOLEAN, 16, NULL, 0x1000,
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, 0x0800,
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, 0x0400,
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, 0x0200,
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, 0x0100,
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, 0x00FF,
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_packet_darwin_dpeb_id,
{ "DPEB ID", "pcapng.options.option.data.packet.darwin.dpeb_id",
FT_UINT32, BASE_DEC, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_darwin_svc_class,
{ "Darwin svc", "pcapng.options.option.data.packet.darwin.svc_class",
FT_UINT32, BASE_DEC, VALS(option_code_darwin_svc_class_vals), 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_darwin_edpeb_id,
{ "Effective DPED ID", "pcapng.options.option.data.packet.darwin.edpeb_id",
FT_UINT32, BASE_DEC, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_darwin_flags,
{ "Darwin Flags", "pcapng.options.option.data.packet.darwin.flags",
FT_UINT32, BASE_HEX, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_darwin_flags_reserved,
{ "Reserved", "pcapng.options.option.data.packet.darwin.flags.reserved",
FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0xFFFFFFC0,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_darwin_flags_wk,
{ "Wake Packet(wk)", "pcapng.options.option.data.packet.darwin.flags.wk",
FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x00000020,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_darwin_flags_ch,
{ "Nexus Channel(ch)", "pcapng.options.option.data.packet.darwin.flags.ch",
FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x00000010,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_darwin_flags_so,
{ "Socket(so)", "pcapng.options.option.data.packet.darwin.flags.so",
FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x00000008,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_darwin_flags_re,
{ "ReXmit(re)", "pcapng.options.option.data.packet.darwin.flags.re",
FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x00000004,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_darwin_flags_ka,
{ "Keep Alive(ka)", "pcapng.options.option.data.packet.darwin.flags.ka",
FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x00000002,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_darwin_flags_nf,
{ "New Flow(nf)", "pcapng.options.option.data.packet.darwin.flags.nf",
FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x00000001,
NULL, HFILL }
},
{ &hf_pcapng_option_data_packet_darwin_flow_id,
{ "Flow ID", "pcapng.options.option.data.packet.darwin.flow_id",
FT_UINT32, BASE_DEC, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_option_data_dns_name,
{ "DNS Name", "pcapng.options.option.data.dns_name",
FT_STRING, BASE_NONE, 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_DEC, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_packet_block_drops_count,
{ "Drops Count", "pcapng.packet.drops_count",
FT_UINT16, BASE_DEC, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_captured_length,
{ "Captured Packet Length", "pcapng.packet.captured_length",
FT_UINT32, BASE_DEC, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_original_length,
{ "Original Packet Length", "pcapng.packet.original_length",
FT_UINT32, 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_UINT32, BASE_DEC, 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_UINT16, 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, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_dsb_secrets_type,
{ "Secrets Type", "pcapng.dsb.secrets_type",
FT_UINT32, BASE_HEX, VALS(dsb_secrets_types_vals), 0x00,
NULL, HFILL }
},
{ &hf_pcapng_dsb_secrets_length,
{ "Secrets Length", "pcapng.dsb.secrets_length",
FT_UINT32, BASE_DEC, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_dsb_secrets_data,
{ "Secrets Data", "pcapng.dsb.secrets_data",
FT_BYTES, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_cb_pen,
{ "Private Enterprise Number (PEN)", "pcapng.cb.pen",
FT_UINT32, BASE_ENTERPRISES, STRINGS_ENTERPRISES, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_cb_data,
{ "Custom Data", "pcapng.cb.custom_data",
FT_BYTES, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_cb_option_string,
{ "Custom Option String", "pcapng.cb.custom_option.string",
FT_STRING, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_pcapng_cb_option_data,
{ "Custom Option Binary", "pcapng.cb.custom_option.data",
FT_BYTES, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
};
static ei_register_info ei[] = {
{ &ei_invalid_byte_order_magic, { "pcapng.invalid_byte_order_magic", PI_PROTOCOL, PI_ERROR, "The byte-order magic number is not valid", EXPFILL }},
{ &ei_block_length_below_block_minimum, { "pcapng.block_length_below_block_minimum", PI_PROTOCOL, PI_ERROR, "Block length is < 12 bytes", EXPFILL }},
{ &ei_block_length_below_block_content_length, { "pcapng.block_length_below_block_content_length", PI_PROTOCOL, PI_ERROR, "Block length is < the length of the contents of the block", EXPFILL }},
{ &ei_block_length_not_multiple_of_4, { "pcapng.block_length_not_multiple_of4", PI_PROTOCOL, PI_ERROR, "Block length is not a multiple of 4", EXPFILL }},
{ &ei_block_lengths_dont_match, { "pcapng.block_lengths_dont_match", PI_PROTOCOL, PI_ERROR, "Block length in trailer differs from block length in header", EXPFILL }},
{ &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 }},
{ &ei_missing_idb, { "pcapng.no_interfaces", PI_PROTOCOL, PI_ERROR, "No Interface Description before block that requires it", EXPFILL }},
};
static int *ett[] = {
&ett_pcapng,
&ett_pcapng_section_header_block,
&ett_pcapng_block_data,
&ett_pcapng_block_type,
&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));
/* Create table for local block dissectors */
s_local_block_callback_table = g_hash_table_new(g_direct_hash, g_direct_equal);
/* Ensure this table will be deleted */
register_shutdown_routine(&pcapng_shutdown_protocol);
}
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 - https://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:
*/
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