forked from osmocom/wireshark
4986 lines
193 KiB
C
4986 lines
193 KiB
C
/* pcapng.c
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*
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* Wiretap Library
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* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
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*
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* File format support for pcapng file format
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* Copyright (c) 2007 by Ulf Lamping <ulf.lamping@web.de>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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/* File format specification:
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* https://github.com/pcapng/pcapng
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* Related Wiki page:
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* https://wiki.wireshark.org/Development/PcapNg
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <wsutil/ws_printf.h>
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#include <wsutil/strtoi.h>
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#include "wtap-int.h"
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#include "file_wrappers.h"
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#include "pcap-common.h"
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#include "pcap-encap.h"
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#include "pcapng.h"
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#include "pcapng_module.h"
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#include "secrets-types.h"
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#if 0
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#define pcapng_debug(...) g_warning(__VA_ARGS__)
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#else
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#define pcapng_debug(...)
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#endif
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#define ROUND_TO_4BYTE(len) ((len + 3) & ~3)
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static gboolean
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pcapng_read(wtap *wth, wtap_rec *rec, Buffer *buf, int *err,
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gchar **err_info, gint64 *data_offset);
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static gboolean
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pcapng_seek_read(wtap *wth, gint64 seek_off,
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wtap_rec *rec, Buffer *buf, int *err, gchar **err_info);
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static void
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pcapng_close(wtap *wth);
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static gboolean
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pcapng_encap_is_ft_specific(int encap);
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/*
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* Minimum block size = size of block header + size of block trailer.
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*/
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#define MIN_BLOCK_SIZE ((guint32)(sizeof(pcapng_block_header_t) + sizeof(guint32)))
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/*
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* Minimum SHB size = minimum block size + size of fixed length portion of SHB.
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*/
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#define MIN_SHB_SIZE ((guint32)(MIN_BLOCK_SIZE + sizeof(pcapng_section_header_block_t)))
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/* pcapng: packet block file encoding (obsolete) */
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typedef struct pcapng_packet_block_s {
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guint16 interface_id;
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guint16 drops_count;
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guint32 timestamp_high;
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guint32 timestamp_low;
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guint32 captured_len;
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guint32 packet_len;
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/* ... Packet Data ... */
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/* ... Padding ... */
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/* ... Options ... */
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} pcapng_packet_block_t;
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/*
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* Minimum PB size = minimum block size + size of fixed length portion of PB.
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*/
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#define MIN_PB_SIZE ((guint32)(MIN_BLOCK_SIZE + sizeof(pcapng_packet_block_t)))
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/* pcapng: enhanced packet block file encoding */
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typedef struct pcapng_enhanced_packet_block_s {
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guint32 interface_id;
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guint32 timestamp_high;
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guint32 timestamp_low;
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guint32 captured_len;
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guint32 packet_len;
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/* ... Packet Data ... */
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/* ... Padding ... */
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/* ... Options ... */
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} pcapng_enhanced_packet_block_t;
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/*
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* Minimum EPB size = minimum block size + size of fixed length portion of EPB.
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*/
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#define MIN_EPB_SIZE ((guint32)(MIN_BLOCK_SIZE + sizeof(pcapng_enhanced_packet_block_t)))
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/* pcapng: simple packet block file encoding */
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typedef struct pcapng_simple_packet_block_s {
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guint32 packet_len;
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/* ... Packet Data ... */
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/* ... Padding ... */
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} pcapng_simple_packet_block_t;
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/*
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* Minimum SPB size = minimum block size + size of fixed length portion of SPB.
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*/
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#define MIN_SPB_SIZE ((guint32)(MIN_BLOCK_SIZE + sizeof(pcapng_simple_packet_block_t)))
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/* pcapng: name resolution block file encoding */
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typedef struct pcapng_name_resolution_block_s {
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guint16 record_type;
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guint16 record_len;
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/* ... Record ... */
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} pcapng_name_resolution_block_t;
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/*
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* Minimum NRB size = minimum block size + size of smallest NRB record
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* (there must at least be an "end of records" record).
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*/
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#define MIN_NRB_SIZE ((guint32)(MIN_BLOCK_SIZE + sizeof(pcapng_name_resolution_block_t)))
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/*
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* Minimum ISB size = minimum block size + size of fixed length portion of ISB.
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*/
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#define MIN_ISB_SIZE ((guint32)(MIN_BLOCK_SIZE + sizeof(pcapng_interface_statistics_block_t)))
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/*
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* Minimum Sysdig size = minimum block size + packed size of sysdig_event_phdr.
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*/
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#define SYSDIG_EVENT_HEADER_SIZE ((16 + 64 + 64 + 32 + 16)/8) /* CPU ID + TS + TID + Event len + Event type */
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#define MIN_SYSDIG_EVENT_SIZE ((guint32)(MIN_BLOCK_SIZE + SYSDIG_EVENT_HEADER_SIZE))
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/*
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* We require __CURSOR + __REALTIME_TIMESTAMP + __MONOTONIC_TIMESTAMP in
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* systemd journal export entries, which is 200 bytes or so (203 on a test
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* system here).
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*/
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#define SDJ__REALTIME_TIMESTAMP "__REALTIME_TIMESTAMP="
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#define MIN_SYSTEMD_JOURNAL_EXPORT_ENTRY_SIZE 200
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#define MIN_SYSTEMD_JOURNAL_EXPORT_BLOCK_SIZE ((guint32)(MIN_SYSTEMD_JOURNAL_EXPORT_ENTRY_SIZE + MIN_BLOCK_SIZE))
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/* pcapng: common option header file encoding for every option type */
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typedef struct pcapng_option_header_s {
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guint16 option_code;
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guint16 option_length;
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/* ... x bytes Option Body ... */
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/* ... Padding ... */
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} pcapng_option_header_t;
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struct option {
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guint16 type;
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guint16 value_length;
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};
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/* Option codes: 16-bit field */
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#define OPT_EPB_FLAGS 0x0002
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#define OPT_EPB_HASH 0x0003
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#define OPT_EPB_DROPCOUNT 0x0004
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#define OPT_EPB_PACKETID 0x0005
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#define OPT_EPB_QUEUE 0x0006
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#define OPT_EPB_VERDICT 0x0007
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#define OPT_NRB_DNSNAME 0x0002
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#define OPT_NRB_DNSV4ADDR 0x0003
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#define OPT_NRB_DNSV6ADDR 0x0004
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/* MSBit of option code means "local type" */
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#define OPT_LOCAL_FLAG 0x8000
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/* OPT_EPB_VERDICT sub-types */
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#define OPT_VERDICT_TYPE_HW 0
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#define OPT_VERDICT_TYPE_TC 1
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#define OPT_VERDICT_TYPE_XDP 2
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/*
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* In order to keep from trying to allocate large chunks of memory,
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* which could either fail or, even if it succeeds, chew up so much
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* address space or memory+backing store as not to leave room for
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* anything else, we impose upper limits on the size of blocks we're
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* willing to handle.
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*
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* We pick a limit of an EPB with a maximum-sized D-Bus packet and 128 KiB
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* worth of options; we use the maximum D-Bus packet size as that's larger
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* than the maximum packet size for other link-layer types, and the maximum
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* packet size for other link-layer types is currently small enough that
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* the resulting block size would be less than the previous 16 MiB limit.
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*/
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#define MAX_BLOCK_SIZE (MIN_EPB_SIZE + WTAP_MAX_PACKET_SIZE_DBUS + 131072)
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/* Note: many of the defined structures for block data are defined in wtap.h */
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/* Packet data - used for both Enhanced Packet Block and the obsolete Packet Block data */
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typedef struct wtapng_packet_s {
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/* mandatory */
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guint32 ts_high; /* seconds since 1.1.1970 */
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guint32 ts_low; /* fraction of seconds, depends on if_tsresol */
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guint32 cap_len; /* data length in the file */
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guint32 packet_len; /* data length on the wire */
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guint32 interface_id; /* identifier of the interface. */
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guint16 drops_count; /* drops count, only valid for packet block */
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/* 0xffff if information no available */
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/* pack_hash */
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/* XXX - put the packet data / pseudo_header here as well? */
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} wtapng_packet_t;
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/* Simple Packet data */
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typedef struct wtapng_simple_packet_s {
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/* mandatory */
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guint32 cap_len; /* data length in the file */
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guint32 packet_len; /* data length on the wire */
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/* XXX - put the packet data / pseudo_header here as well? */
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} wtapng_simple_packet_t;
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/* Section data in private struct */
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typedef struct section_info_t {
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gboolean byte_swapped; /**< TRUE if this section is not in our byte order */
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guint16 version_major; /**< Major version number of this section */
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guint16 version_minor; /**< Minor version number of this section */
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GArray *interfaces; /**< Interfaces found in this section */
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gint64 shb_off; /**< File offset of the SHB for this section */
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} section_info_t;
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/* Interface data in private struct */
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typedef struct interface_info_s {
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int wtap_encap;
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guint32 snap_len;
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guint64 time_units_per_second;
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int tsprecision;
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int fcslen;
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} interface_info_t;
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typedef struct {
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guint current_section_number; /**< Section number of the current section being read sequentially */
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GArray *sections; /**< Sections found in the capture file. */
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wtap_new_ipv4_callback_t add_new_ipv4;
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wtap_new_ipv6_callback_t add_new_ipv6;
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} pcapng_t;
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#ifdef HAVE_PLUGINS
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/*
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* Table for plugins to handle particular block types.
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*
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* A handler has a "read" routine and a "write" routine.
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*
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* A "read" routine returns a block as a libwiretap record, filling
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* in the wtap_pkthdr structure with the appropriate record type and
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* other information, and filling in the supplied Buffer with
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* data for which there's no place in the wtap_pkthdr structure.
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*
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* A "write" routine takes a libwiretap record and Buffer and writes
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* out a block.
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*/
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typedef struct {
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block_reader reader;
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block_writer writer;
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} block_handler;
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static GHashTable *block_handlers;
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void
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register_pcapng_block_type_handler(guint block_type, block_reader reader,
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block_writer writer)
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{
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block_handler *handler;
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/*
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* Is this a known block type?
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*/
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switch (block_type) {
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case BLOCK_TYPE_SHB:
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case BLOCK_TYPE_IDB:
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case BLOCK_TYPE_PB:
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case BLOCK_TYPE_SPB:
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case BLOCK_TYPE_NRB:
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case BLOCK_TYPE_ISB:
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case BLOCK_TYPE_EPB:
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case BLOCK_TYPE_DSB:
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case BLOCK_TYPE_SYSDIG_EVENT:
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case BLOCK_TYPE_SYSTEMD_JOURNAL:
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/*
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* Yes; we already handle it, and don't allow a replacement to
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* be registeted (if there's a bug in our code, or there's
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* something we don't handle in that block, submit a change
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* to the main Wireshark source).
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*/
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g_warning("Attempt to register plugin for block type 0x%08x not allowed",
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block_type);
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return;
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case BLOCK_TYPE_IRIG_TS:
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case BLOCK_TYPE_ARINC_429:
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case BLOCK_TYPE_SYSDIG_EVF:
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/*
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* Yes, and we don't already handle it. Allow a plugin to
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* handle it.
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*
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* (But why not submit the plugin source to Wireshark?)
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*/
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break;
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default:
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/*
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* No; is it a local block type?
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*/
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if (!(block_type & 0x80000000)) {
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/*
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* No; don't allow a plugin to be registered for it, as
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* the block type needs to be registered before it's used.
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*/
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g_warning("Attempt to register plugin for reserved block type 0x%08x not allowed",
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block_type);
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return;
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}
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/*
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* Yes; allow the registration.
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*/
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break;
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}
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if (block_handlers == NULL) {
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/*
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* Create the table of block handlers.
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*
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* XXX - there's no "g_uint_hash()" or "g_uint_equal()",
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* so we use "g_direct_hash()" and "g_direct_equal()".
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*/
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block_handlers = g_hash_table_new_full(g_direct_hash,
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g_direct_equal,
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NULL, g_free);
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}
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handler = g_new(block_handler, 1);
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handler->reader = reader;
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handler->writer = writer;
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g_hash_table_insert(block_handlers, GUINT_TO_POINTER(block_type),
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handler);
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}
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/*
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* Tables for plugins to handle particular options for particular block
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* types.
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*
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* An option has a handler routine, which is passed an indication of
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* whether this section of the file is byte-swapped, the length of the
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* option, the data of the option, a pointer to an error code, and a
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* pointer to a pointer variable for an error string.
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*
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* It checks whether the length and option are valid, and, if they aren't,
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* returns FALSE, setting the error code to the appropriate error (normally
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* WTAP_ERR_BAD_FILE) and the error string to an appropriate string
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* indicating the problem.
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*
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* Otherwise, if this section of the file is byte-swapped, it byte-swaps
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* multi-byte numerical values, so that it's in the host byte order.
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*/
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/*
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* Block types indices in the table of tables of option handlers.
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*
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* Block types are not guaranteed to be sequential, so we map the
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* block types we support to a sequential set. Furthermore, all
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* packet block types have the same set of options.
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*/
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#define BT_INDEX_SHB 0
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#define BT_INDEX_IDB 1
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#define BT_INDEX_PBS 2 /* all packet blocks */
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#define BT_INDEX_NRB 3
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#define BT_INDEX_ISB 4
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#define BT_INDEX_EVT 5
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#define BT_INDEX_DSB 6
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#define NUM_BT_INDICES 7
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typedef struct {
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option_handler_fn hfunc;
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} option_handler;
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static GHashTable *option_handlers[NUM_BT_INDICES];
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static gboolean
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get_block_type_index(guint block_type, guint *bt_index)
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{
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g_assert(bt_index);
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switch (block_type) {
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case BLOCK_TYPE_SHB:
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*bt_index = BT_INDEX_SHB;
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break;
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case BLOCK_TYPE_IDB:
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*bt_index = BT_INDEX_IDB;
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break;
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case BLOCK_TYPE_PB:
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case BLOCK_TYPE_EPB:
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case BLOCK_TYPE_SPB:
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*bt_index = BT_INDEX_PBS;
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break;
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case BLOCK_TYPE_NRB:
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*bt_index = BT_INDEX_NRB;
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break;
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case BLOCK_TYPE_ISB:
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*bt_index = BT_INDEX_ISB;
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break;
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case BLOCK_TYPE_SYSDIG_EVENT:
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/* case BLOCK_TYPE_SYSDIG_EVF: */
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*bt_index = BT_INDEX_EVT;
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break;
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case BLOCK_TYPE_DSB:
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*bt_index = BT_INDEX_DSB;
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break;
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default:
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/*
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* This is a block type we don't process; either we ignore it,
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* in which case the options don't get processed, or there's
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* a plugin routine to handle it, in which case that routine
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* will do the option processing itself.
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*
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* XXX - report an error?
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*/
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return FALSE;
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}
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return TRUE;
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}
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void
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register_pcapng_option_handler(guint block_type, guint option_code,
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option_handler_fn hfunc)
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{
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guint bt_index;
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option_handler *handler;
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if (!get_block_type_index(block_type, &bt_index))
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return;
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if (option_handlers[bt_index] == NULL) {
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/*
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* Create the table of option handlers for this block type.
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*
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* XXX - there's no "g_uint_hash()" or "g_uint_equal()",
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* so we use "g_direct_hash()" and "g_direct_equal()".
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*/
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option_handlers[bt_index] = g_hash_table_new_full(g_direct_hash,
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g_direct_equal,
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NULL, g_free);
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}
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handler = g_new(option_handler, 1);
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handler->hfunc = hfunc;
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g_hash_table_insert(option_handlers[bt_index],
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GUINT_TO_POINTER(option_code), handler);
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}
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#endif /* HAVE_PLUGINS */
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static int
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pcapng_read_option(FILE_T fh, const section_info_t *section_info,
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pcapng_option_header_t *oh,
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guint8 *content, guint len, guint to_read,
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int *err, gchar **err_info, gchar* block_name)
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{
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int block_read;
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/* sanity check: don't run past the end of the block */
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if (to_read < sizeof (*oh)) {
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*err = WTAP_ERR_BAD_FILE;
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*err_info = g_strdup_printf("pcapng_read_option: Not enough data to read header of the %s block",
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block_name);
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return -1;
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}
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/* read option header */
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if (!wtap_read_bytes(fh, oh, sizeof (*oh), err, err_info)) {
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pcapng_debug("pcapng_read_option: failed to read option");
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return -1;
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}
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block_read = sizeof (*oh);
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if (section_info->byte_swapped) {
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oh->option_code = GUINT16_SWAP_LE_BE(oh->option_code);
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oh->option_length = GUINT16_SWAP_LE_BE(oh->option_length);
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}
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/* sanity check: don't run past the end of the block */
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if (to_read < sizeof (*oh) + oh->option_length) {
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*err = WTAP_ERR_BAD_FILE;
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*err_info = g_strdup_printf("pcapng_read_option: Not enough data to handle option length (%d) of the %s block",
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oh->option_length, block_name);
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return -1;
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}
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|
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/* sanity check: option length */
|
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if (len < oh->option_length) {
|
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*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_option: option length (%d) to long for %s block",
|
|
len, block_name);
|
|
return -1;
|
|
}
|
|
|
|
/* read option content */
|
|
if (!wtap_read_bytes(fh, content, oh->option_length, err, err_info)) {
|
|
pcapng_debug("pcapng_read_option: failed to read content of option %u", oh->option_code);
|
|
return -1;
|
|
}
|
|
block_read += oh->option_length;
|
|
|
|
/* jump over potential padding bytes at end of option */
|
|
if ( (oh->option_length % 4) != 0) {
|
|
if (!wtap_read_bytes(fh, NULL, 4 - (oh->option_length % 4), err, err_info))
|
|
return -1;
|
|
block_read += 4 - (oh->option_length % 4);
|
|
}
|
|
|
|
return block_read;
|
|
}
|
|
|
|
typedef enum {
|
|
PCAPNG_BLOCK_OK,
|
|
PCAPNG_BLOCK_NOT_SHB,
|
|
PCAPNG_BLOCK_ERROR
|
|
} block_return_val;
|
|
|
|
static block_return_val
|
|
pcapng_read_section_header_block(FILE_T fh, pcapng_block_header_t *bh,
|
|
section_info_t *section_info,
|
|
wtapng_block_t *wblock,
|
|
int *err, gchar **err_info)
|
|
{
|
|
int bytes_read;
|
|
gboolean byte_swapped;
|
|
guint16 version_major;
|
|
guint16 version_minor;
|
|
guint to_read, opt_cont_buf_len;
|
|
pcapng_section_header_block_t shb;
|
|
pcapng_option_header_t oh;
|
|
wtapng_mandatory_section_t* section_data;
|
|
gchar* tmp_content;
|
|
|
|
guint8 *option_content = NULL; /* Allocate as large as the options block */
|
|
|
|
/* read fixed-length part of the block */
|
|
if (!wtap_read_bytes(fh, &shb, sizeof shb, err, err_info)) {
|
|
if (*err == WTAP_ERR_SHORT_READ) {
|
|
/*
|
|
* This block is too short to be an SHB.
|
|
*
|
|
* If we're reading this as part of an open,
|
|
* the file is too short to be a pcapng file.
|
|
*
|
|
* If we're not, we treat PCAPNG_BLOCK_NOT_SHB and
|
|
* PCAPNG_BLOCK_ERROR the same, so we can just return
|
|
* PCAPNG_BLOCK_NOT_SHB in both cases.
|
|
*/
|
|
return PCAPNG_BLOCK_NOT_SHB;
|
|
}
|
|
return PCAPNG_BLOCK_ERROR;
|
|
}
|
|
|
|
/* is the magic number one we expect? */
|
|
switch (shb.magic) {
|
|
case(0x1A2B3C4D):
|
|
/* this seems pcapng with correct byte order */
|
|
byte_swapped = FALSE;
|
|
version_major = shb.version_major;
|
|
version_minor = shb.version_minor;
|
|
|
|
pcapng_debug("pcapng_read_section_header_block: SHB (our byte order) V%u.%u, len %u",
|
|
version_major, version_minor, bh->block_total_length);
|
|
break;
|
|
case(0x4D3C2B1A):
|
|
/* this seems pcapng with swapped byte order */
|
|
byte_swapped = TRUE;
|
|
version_major = GUINT16_SWAP_LE_BE(shb.version_major);
|
|
version_minor = GUINT16_SWAP_LE_BE(shb.version_minor);
|
|
|
|
/* tweak the block length to meet current swapping that we know now */
|
|
bh->block_total_length = GUINT32_SWAP_LE_BE(bh->block_total_length);
|
|
|
|
pcapng_debug("pcapng_read_section_header_block: SHB (byte-swapped) V%u.%u, len %u",
|
|
version_major, version_minor, bh->block_total_length);
|
|
break;
|
|
default:
|
|
/* Not a "pcapng" magic number we know about. */
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_section_header_block: unknown byte-order magic number 0x%08x", shb.magic);
|
|
|
|
/*
|
|
* See above comment about PCAPNG_BLOCK_NOT_SHB.
|
|
*/
|
|
return PCAPNG_BLOCK_NOT_SHB;
|
|
}
|
|
|
|
/*
|
|
* Is this block long enough to be an SHB?
|
|
*/
|
|
if (bh->block_total_length < MIN_SHB_SIZE) {
|
|
/*
|
|
* No.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_section_header_block: total block length %u of an SHB is less than the minimum SHB size %u",
|
|
bh->block_total_length, MIN_SHB_SIZE);
|
|
return PCAPNG_BLOCK_ERROR;
|
|
}
|
|
|
|
/* OK, at this point we assume it's a pcapng file.
|
|
|
|
Don't try to allocate memory for a huge number of options, as
|
|
that might fail and, even if it succeeds, it might not leave
|
|
any address space or memory+backing store for anything else.
|
|
|
|
We do that by imposing a maximum block size of MAX_BLOCK_SIZE.
|
|
We check for this *after* checking the SHB for its byte
|
|
order magic number, so that non-pcapng files are less
|
|
likely to be treated as bad pcapng files. */
|
|
if (bh->block_total_length > MAX_BLOCK_SIZE) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_section_header_block: total block length %u is too large (> %u)",
|
|
bh->block_total_length, MAX_BLOCK_SIZE);
|
|
return PCAPNG_BLOCK_ERROR;
|
|
}
|
|
|
|
/* we currently only understand SHB V1.0 */
|
|
if (version_major != 1 || version_minor > 0) {
|
|
*err = WTAP_ERR_UNSUPPORTED;
|
|
*err_info = g_strdup_printf("pcapng_read_section_header_block: unknown SHB version %u.%u",
|
|
version_major, version_minor);
|
|
return PCAPNG_BLOCK_ERROR;
|
|
}
|
|
|
|
section_info->byte_swapped = byte_swapped;
|
|
section_info->version_major = version_major;
|
|
section_info->version_minor = version_minor;
|
|
|
|
wblock->block = wtap_block_create(WTAP_BLOCK_NG_SECTION);
|
|
section_data = (wtapng_mandatory_section_t*)wtap_block_get_mandatory_data(wblock->block);
|
|
/* 64bit section_length (currently unused) */
|
|
if (section_info->byte_swapped) {
|
|
section_data->section_length = GUINT64_SWAP_LE_BE(shb.section_length);
|
|
} else {
|
|
section_data->section_length = shb.section_length;
|
|
}
|
|
|
|
/* Options */
|
|
to_read = bh->block_total_length - MIN_SHB_SIZE;
|
|
|
|
/* Allocate enough memory to hold all options */
|
|
opt_cont_buf_len = to_read;
|
|
option_content = (guint8 *)g_try_malloc(opt_cont_buf_len);
|
|
if (opt_cont_buf_len != 0 && option_content == NULL) {
|
|
*err = ENOMEM; /* we assume we're out of memory */
|
|
return PCAPNG_BLOCK_ERROR;
|
|
}
|
|
pcapng_debug("pcapng_read_section_header_block: Options %u bytes", to_read);
|
|
while (to_read != 0) {
|
|
/* read option */
|
|
pcapng_debug("pcapng_read_section_header_block: Options %u bytes remaining", to_read);
|
|
bytes_read = pcapng_read_option(fh, section_info, &oh, option_content, opt_cont_buf_len, to_read, err, err_info, "section_header");
|
|
if (bytes_read <= 0) {
|
|
pcapng_debug("pcapng_read_section_header_block: failed to read option");
|
|
g_free(option_content);
|
|
return PCAPNG_BLOCK_ERROR;
|
|
}
|
|
to_read -= bytes_read;
|
|
|
|
/* handle option content */
|
|
switch (oh.option_code) {
|
|
case(OPT_EOFOPT):
|
|
if (to_read != 0) {
|
|
pcapng_debug("pcapng_read_section_header_block: %u bytes after opt_endofopt", to_read);
|
|
}
|
|
/* padding should be ok here, just get out of this */
|
|
to_read = 0;
|
|
break;
|
|
case(OPT_COMMENT):
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
tmp_content = g_strndup((char *)option_content, oh.option_length);
|
|
wtap_block_add_string_option(wblock->block, OPT_COMMENT, option_content, oh.option_length);
|
|
pcapng_debug("pcapng_read_section_header_block: opt_comment %s", tmp_content);
|
|
g_free(tmp_content);
|
|
} else {
|
|
pcapng_debug("pcapng_read_section_header_block: opt_comment length %u seems strange", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_SHB_HARDWARE):
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
tmp_content = g_strndup((char *)option_content, oh.option_length);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_string_option(wblock->block, OPT_SHB_HARDWARE, option_content, oh.option_length);
|
|
pcapng_debug("pcapng_read_section_header_block: shb_hardware %s", tmp_content);
|
|
g_free(tmp_content);
|
|
} else {
|
|
pcapng_debug("pcapng_read_section_header_block: shb_hardware length %u seems strange", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_SHB_OS):
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
tmp_content = g_strndup((char *)option_content, oh.option_length);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_string_option(wblock->block, OPT_SHB_OS, option_content, oh.option_length);
|
|
pcapng_debug("pcapng_read_section_header_block: shb_os %s", tmp_content);
|
|
g_free(tmp_content);
|
|
} else {
|
|
pcapng_debug("pcapng_read_section_header_block: shb_os length %u seems strange, opt buffsize %u", oh.option_length,to_read);
|
|
}
|
|
break;
|
|
case(OPT_SHB_USERAPPL):
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
tmp_content = g_strndup((char *)option_content, oh.option_length);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_string_option(wblock->block, OPT_SHB_USERAPPL, option_content, oh.option_length);
|
|
pcapng_debug("pcapng_read_section_header_block: shb_user_appl %s", tmp_content);
|
|
g_free(tmp_content);
|
|
} else {
|
|
pcapng_debug("pcapng_read_section_header_block: shb_user_appl length %u seems strange", oh.option_length);
|
|
}
|
|
break;
|
|
default:
|
|
pcapng_debug("pcapng_read_section_header_block: unknown option %u - ignoring %u bytes",
|
|
oh.option_code, oh.option_length);
|
|
}
|
|
}
|
|
g_free(option_content);
|
|
|
|
/*
|
|
* We don't return these to the caller in pcapng_read().
|
|
*/
|
|
wblock->internal = TRUE;
|
|
|
|
return PCAPNG_BLOCK_OK;
|
|
}
|
|
|
|
|
|
/* "Interface Description Block" */
|
|
static gboolean
|
|
pcapng_read_if_descr_block(wtap *wth, FILE_T fh, pcapng_block_header_t *bh,
|
|
const section_info_t *section_info,
|
|
wtapng_block_t *wblock, int *err, gchar **err_info)
|
|
{
|
|
guint64 time_units_per_second = 1000000; /* default = 10^6 */
|
|
int tsprecision = WTAP_TSPREC_USEC;
|
|
int bytes_read;
|
|
guint to_read, opt_cont_buf_len;
|
|
pcapng_interface_description_block_t idb;
|
|
wtapng_if_descr_mandatory_t* if_descr_mand;
|
|
guint link_type;
|
|
pcapng_option_header_t oh;
|
|
guint8 *option_content = NULL; /* Allocate as large as the options block */
|
|
gchar* tmp_content;
|
|
guint64 tmp64;
|
|
|
|
/*
|
|
* Is this block long enough to be an IDB?
|
|
*/
|
|
if (bh->block_total_length < MIN_IDB_SIZE) {
|
|
/*
|
|
* No.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_if_descr_block: total block length %u of an IDB is less than the minimum IDB size %u",
|
|
bh->block_total_length, MIN_IDB_SIZE);
|
|
return FALSE;
|
|
}
|
|
|
|
/* read block content */
|
|
if (!wtap_read_bytes(fh, &idb, sizeof idb, err, err_info)) {
|
|
pcapng_debug("pcapng_read_if_descr_block: failed to read IDB");
|
|
return FALSE;
|
|
}
|
|
|
|
/* mandatory values */
|
|
wblock->block = wtap_block_create(WTAP_BLOCK_IF_DESCR);
|
|
if_descr_mand = (wtapng_if_descr_mandatory_t*)wtap_block_get_mandatory_data(wblock->block);
|
|
if (section_info->byte_swapped) {
|
|
link_type = GUINT16_SWAP_LE_BE(idb.linktype);
|
|
if_descr_mand->snap_len = GUINT32_SWAP_LE_BE(idb.snaplen);
|
|
} else {
|
|
link_type = idb.linktype;
|
|
if_descr_mand->snap_len = idb.snaplen;
|
|
}
|
|
|
|
if_descr_mand->wtap_encap = wtap_pcap_encap_to_wtap_encap(link_type);
|
|
if_descr_mand->time_units_per_second = time_units_per_second;
|
|
if_descr_mand->tsprecision = tsprecision;
|
|
|
|
pcapng_debug("pcapng_read_if_descr_block: IDB link_type %u (%s), snap %u",
|
|
link_type,
|
|
wtap_encap_description(if_descr_mand->wtap_encap),
|
|
if_descr_mand->snap_len);
|
|
|
|
if (if_descr_mand->snap_len > wtap_max_snaplen_for_encap(if_descr_mand->wtap_encap)) {
|
|
/*
|
|
* We do not use this value, maybe we should check the
|
|
* snap_len of the packets against it. For now, only warn.
|
|
*/
|
|
pcapng_debug("pcapng_read_if_descr_block: snapshot length %u unrealistic.",
|
|
if_descr_mand->snap_len);
|
|
/*if_descr_mand->snap_len = WTAP_MAX_PACKET_SIZE_STANDARD;*/
|
|
}
|
|
|
|
/* Options */
|
|
to_read = bh->block_total_length - MIN_IDB_SIZE;
|
|
|
|
/* Allocate enough memory to hold all options */
|
|
opt_cont_buf_len = to_read;
|
|
option_content = (guint8 *)g_try_malloc(opt_cont_buf_len);
|
|
if (opt_cont_buf_len != 0 && option_content == NULL) {
|
|
*err = ENOMEM; /* we assume we're out of memory */
|
|
return FALSE;
|
|
}
|
|
|
|
while (to_read != 0) {
|
|
/* read option */
|
|
bytes_read = pcapng_read_option(fh, section_info, &oh, option_content, opt_cont_buf_len, to_read, err, err_info, "if_descr");
|
|
if (bytes_read <= 0) {
|
|
pcapng_debug("pcapng_read_if_descr_block: failed to read option");
|
|
g_free(option_content);
|
|
return FALSE;
|
|
}
|
|
to_read -= bytes_read;
|
|
|
|
/* handle option content */
|
|
switch (oh.option_code) {
|
|
case(OPT_EOFOPT): /* opt_endofopt */
|
|
if (to_read != 0) {
|
|
pcapng_debug("pcapng_read_if_descr_block: %u bytes after opt_endofopt", to_read);
|
|
}
|
|
/* padding should be ok here, just get out of this */
|
|
to_read = 0;
|
|
break;
|
|
case(OPT_COMMENT): /* opt_comment */
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
tmp_content = g_strndup((char *)option_content, oh.option_length);
|
|
wtap_block_add_string_option(wblock->block, oh.option_code, option_content, oh.option_length);
|
|
pcapng_debug("pcapng_read_if_descr_block: opt_comment %s", tmp_content);
|
|
g_free(tmp_content);
|
|
} else {
|
|
pcapng_debug("pcapng_read_if_descr_block: opt_comment length %u seems strange", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_IDB_NAME): /* if_name */
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
tmp_content = g_strndup((char *)option_content, oh.option_length);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_string_option(wblock->block, oh.option_code, option_content, oh.option_length);
|
|
pcapng_debug("pcapng_read_if_descr_block: if_name %s", tmp_content);
|
|
g_free(tmp_content);
|
|
} else {
|
|
pcapng_debug("pcapng_read_if_descr_block: if_name length %u seems strange", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_IDB_DESCR): /* if_description */
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
tmp_content = g_strndup((char *)option_content, oh.option_length);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_string_option(wblock->block, oh.option_code, option_content, oh.option_length);
|
|
pcapng_debug("pcapng_read_if_descr_block: if_description %s", tmp_content);
|
|
g_free(tmp_content);
|
|
} else {
|
|
pcapng_debug("pcapng_read_if_descr_block: if_description length %u seems strange", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_IDB_SPEED): /* if_speed */
|
|
if (oh.option_length == 8) {
|
|
/* Don't cast a guint8 * into a guint64 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
memcpy(&tmp64, option_content, sizeof(guint64));
|
|
if (section_info->byte_swapped)
|
|
tmp64 = GUINT64_SWAP_LE_BE(tmp64);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_uint64_option(wblock->block, oh.option_code, tmp64);
|
|
pcapng_debug("pcapng_read_if_descr_block: if_speed %" G_GINT64_MODIFIER "u (bps)", tmp64);
|
|
} else {
|
|
pcapng_debug("pcapng_read_if_descr_block: if_speed length %u not 8 as expected", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_IDB_TSRESOL): /* if_tsresol */
|
|
if (oh.option_length == 1) {
|
|
guint64 base;
|
|
guint64 result;
|
|
guint8 i, exponent, if_tsresol;
|
|
|
|
if_tsresol = option_content[0];
|
|
if (if_tsresol & 0x80) {
|
|
base = 2;
|
|
} else {
|
|
base = 10;
|
|
}
|
|
exponent = (guint8)(if_tsresol & 0x7f);
|
|
if (((base == 2) && (exponent < 64)) || ((base == 10) && (exponent < 20))) {
|
|
result = 1;
|
|
for (i = 0; i < exponent; i++) {
|
|
result *= base;
|
|
}
|
|
time_units_per_second = result;
|
|
} else {
|
|
time_units_per_second = G_MAXUINT64;
|
|
}
|
|
if (time_units_per_second > (((guint64)1) << 32)) {
|
|
pcapng_debug("pcapng_open: time conversion might be inaccurate");
|
|
}
|
|
if_descr_mand->time_units_per_second = time_units_per_second;
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_uint8_option(wblock->block, oh.option_code, if_tsresol);
|
|
if (time_units_per_second >= 1000000000)
|
|
tsprecision = WTAP_TSPREC_NSEC;
|
|
else if (time_units_per_second >= 1000000)
|
|
tsprecision = WTAP_TSPREC_USEC;
|
|
else if (time_units_per_second >= 1000)
|
|
tsprecision = WTAP_TSPREC_MSEC;
|
|
else if (time_units_per_second >= 100)
|
|
tsprecision = WTAP_TSPREC_CSEC;
|
|
else if (time_units_per_second >= 10)
|
|
tsprecision = WTAP_TSPREC_DSEC;
|
|
else
|
|
tsprecision = WTAP_TSPREC_SEC;
|
|
if_descr_mand->tsprecision = tsprecision;
|
|
pcapng_debug("pcapng_read_if_descr_block: if_tsresol %u, units/s %" G_GINT64_MODIFIER "u, tsprecision %d", if_tsresol, if_descr_mand->time_units_per_second, tsprecision);
|
|
} else {
|
|
pcapng_debug("pcapng_read_if_descr_block: if_tsresol length %u not 1 as expected", oh.option_length);
|
|
}
|
|
break;
|
|
/*
|
|
* if_tzone 10 Time zone for GMT support (TODO: specify better). TODO: give a good example
|
|
*/
|
|
case(OPT_IDB_FILTER): /* if_filter */
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
wtapng_if_descr_filter_t if_filter = {0};
|
|
|
|
/* The first byte of the Option Data keeps a code of the filter used (e.g. if this is a libpcap string,
|
|
* or BPF bytecode.
|
|
*/
|
|
if (option_content[0] == 0) {
|
|
if_filter.if_filter_str = g_strndup((char *)option_content+1, oh.option_length-1);
|
|
pcapng_debug("pcapng_read_if_descr_block: if_filter_str %s oh.option_length %u", if_filter.if_filter_str, oh.option_length);
|
|
} else if (option_content[0] == 1) {
|
|
if_filter.bpf_filter_len = oh.option_length-1;
|
|
if_filter.if_filter_bpf_bytes = option_content+1;
|
|
}
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_custom_option(wblock->block, oh.option_code, &if_filter, sizeof if_filter);
|
|
g_free(if_filter.if_filter_str);
|
|
} else {
|
|
pcapng_debug("pcapng_read_if_descr_block: if_filter length %u seems strange", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_IDB_OS): /* if_os */
|
|
/*
|
|
* if_os 12 A UTF-8 string containing the name of the operating system of the machine in which this interface is installed.
|
|
* This can be different from the same information that can be contained by the Section Header Block (Section 3.1 (Section Header Block (mandatory)))
|
|
* because the capture can have been done on a remote machine. "Windows XP SP2" / "openSUSE 10.2" / ...
|
|
*/
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
tmp_content = g_strndup((char *)option_content, oh.option_length);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_string_option(wblock->block, oh.option_code, option_content, oh.option_length);
|
|
pcapng_debug("pcapng_read_if_descr_block: if_os %s", tmp_content);
|
|
g_free(tmp_content);
|
|
} else {
|
|
pcapng_debug("pcapng_read_if_descr_block: if_os length %u seems strange", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_IDB_FCSLEN): /* if_fcslen */
|
|
if (oh.option_length == 1) {
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_uint8_option(wblock->block, oh.option_code, option_content[0]);
|
|
pcapng_debug("pcapng_read_if_descr_block: if_fcslen %u", option_content[0]);
|
|
/* XXX - add sanity check */
|
|
} else {
|
|
pcapng_debug("pcapng_read_if_descr_block: if_fcslen length %u not 1 as expected", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_IDB_HARDWARE): /* if_hardware */
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
tmp_content = g_strndup((char *)option_content, oh.option_length);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_string_option(wblock->block, oh.option_code, option_content, oh.option_length);
|
|
pcapng_debug("pcapng_read_if_descr_block: if_hardware %s", tmp_content);
|
|
g_free(tmp_content);
|
|
} else {
|
|
pcapng_debug("pcapng_read_if_descr_block: if_description length %u seems strange", oh.option_length);
|
|
}
|
|
break;
|
|
|
|
/* TODO: process these! */
|
|
case(OPT_IDB_IP4ADDR):
|
|
/*
|
|
* Interface network address and netmask. This option can be
|
|
* repeated multiple times within the same Interface
|
|
* Description Block when multiple IPv4 addresses are assigned
|
|
* to the interface. 192 168 1 1 255 255 255 0
|
|
*/
|
|
case(OPT_IDB_IP6ADDR):
|
|
/*
|
|
* Interface network address and prefix length (stored in the
|
|
* last byte). This option can be repeated multiple times
|
|
* within the same Interface Description Block when multiple
|
|
* IPv6 addresses are assigned to the interface.
|
|
* 2001:0db8:85a3:08d3:1319:8a2e:0370:7344/64 is written (in
|
|
* hex) as "20 01 0d b8 85 a3 08 d3 13 19 8a 2e 03 70 73 44
|
|
* 40"
|
|
*/
|
|
case(OPT_IDB_MACADDR):
|
|
/*
|
|
* Interface Hardware MAC address (48 bits). 00 01 02 03 04 05
|
|
*/
|
|
case(OPT_IDB_EUIADDR):
|
|
/*
|
|
* Interface Hardware EUI address (64 bits), if available.
|
|
* TODO: give a good example
|
|
*/
|
|
case(OPT_IDB_TZONE):
|
|
/*
|
|
* Time zone for GMT support. TODO: specify better.
|
|
* TODO: give a good example.
|
|
*/
|
|
case(OPT_IDB_TSOFFSET):
|
|
/*
|
|
* A 64 bits integer value that specifies an offset (in
|
|
* seconds) that must be added to the timestamp of each packet
|
|
* to obtain the absolute timestamp of a packet. If the option
|
|
* is missing, the timestamps stored in the packet must be
|
|
* considered absolute timestamps. The time zone of the offset
|
|
* can be specified with the option if_tzone.
|
|
*
|
|
* TODO: won't a if_tsoffset_low for fractional second offsets
|
|
* be useful for highly synchronized capture systems? 1234
|
|
*/
|
|
default:
|
|
pcapng_debug("pcapng_read_if_descr_block: unknown option %u - ignoring %u bytes",
|
|
oh.option_code, oh.option_length);
|
|
}
|
|
}
|
|
|
|
g_free(option_content);
|
|
|
|
/*
|
|
* If the per-file encapsulation isn't known, set it to this
|
|
* interface's encapsulation.
|
|
*
|
|
* If it *is* known, and it isn't this interface's encapsulation,
|
|
* set it to WTAP_ENCAP_PER_PACKET, as this file doesn't
|
|
* have a single encapsulation for all interfaces in the file,
|
|
* so it probably doesn't have a single encapsulation for all
|
|
* packets in the file.
|
|
*/
|
|
if (wth->file_encap == WTAP_ENCAP_UNKNOWN) {
|
|
wth->file_encap = if_descr_mand->wtap_encap;
|
|
} else {
|
|
if (wth->file_encap != if_descr_mand->wtap_encap) {
|
|
wth->file_encap = WTAP_ENCAP_PER_PACKET;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The same applies to the per-file time stamp resolution.
|
|
*/
|
|
if (wth->file_tsprec == WTAP_TSPREC_UNKNOWN) {
|
|
wth->file_tsprec = if_descr_mand->tsprecision;
|
|
} else {
|
|
if (wth->file_tsprec != if_descr_mand->tsprecision) {
|
|
wth->file_tsprec = WTAP_TSPREC_PER_PACKET;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We don't return these to the caller in pcapng_read().
|
|
*/
|
|
wblock->internal = TRUE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_read_decryption_secrets_block(FILE_T fh, pcapng_block_header_t *bh,
|
|
const section_info_t *section_info,
|
|
wtapng_block_t *wblock,
|
|
int *err, gchar **err_info)
|
|
{
|
|
guint to_read;
|
|
pcapng_decryption_secrets_block_t dsb;
|
|
wtapng_dsb_mandatory_t *dsb_mand;
|
|
|
|
/* read block content */
|
|
if (!wtap_read_bytes(fh, &dsb, sizeof(dsb), err, err_info)) {
|
|
pcapng_debug("%s: failed to read DSB", G_STRFUNC);
|
|
return FALSE;
|
|
}
|
|
|
|
/* mandatory values */
|
|
wblock->block = wtap_block_create(WTAP_BLOCK_DSB);
|
|
dsb_mand = (wtapng_dsb_mandatory_t *)wtap_block_get_mandatory_data(wblock->block);
|
|
if (section_info->byte_swapped) {
|
|
dsb_mand->secrets_type = GUINT32_SWAP_LE_BE(dsb.secrets_type);
|
|
dsb_mand->secrets_len = GUINT32_SWAP_LE_BE(dsb.secrets_len);
|
|
} else {
|
|
dsb_mand->secrets_type = dsb.secrets_type;
|
|
dsb_mand->secrets_len = dsb.secrets_len;
|
|
}
|
|
/* Sanity check: assume the secrets are not larger than 1 GiB */
|
|
if (dsb_mand->secrets_len > 1024 * 1024 * 1024) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("%s: secrets block is too large: %u", G_STRFUNC, dsb_mand->secrets_len);
|
|
return FALSE;
|
|
}
|
|
dsb_mand->secrets_data = (char *)g_malloc0(dsb_mand->secrets_len);
|
|
if (!wtap_read_bytes(fh, dsb_mand->secrets_data, dsb_mand->secrets_len, err, err_info)) {
|
|
pcapng_debug("%s: failed to read DSB", G_STRFUNC);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Skip past padding and discard options (not supported yet). */
|
|
to_read = bh->block_total_length - MIN_DSB_SIZE - dsb_mand->secrets_len;
|
|
if (!wtap_read_bytes(fh, NULL, to_read, err, err_info)) {
|
|
pcapng_debug("%s: failed to read DSB options", G_STRFUNC);
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* We don't return these to the caller in pcapng_read().
|
|
*/
|
|
wblock->internal = TRUE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_read_packet_block(FILE_T fh, pcapng_block_header_t *bh,
|
|
const section_info_t *section_info,
|
|
wtapng_block_t *wblock,
|
|
int *err, gchar **err_info, gboolean enhanced)
|
|
{
|
|
int bytes_read;
|
|
guint block_read;
|
|
guint to_read, opt_cont_buf_len;
|
|
pcapng_enhanced_packet_block_t epb;
|
|
pcapng_packet_block_t pb;
|
|
wtapng_packet_t packet;
|
|
guint32 block_total_length;
|
|
guint32 padding;
|
|
interface_info_t iface_info;
|
|
guint64 ts;
|
|
guint8 *opt_ptr;
|
|
pcapng_option_header_t *oh;
|
|
guint8 *option_content;
|
|
gpointer option_content_copy;
|
|
int pseudo_header_len;
|
|
int fcslen;
|
|
#ifdef HAVE_PLUGINS
|
|
option_handler *handler;
|
|
#endif
|
|
|
|
/* "(Enhanced) Packet Block" read fixed part */
|
|
if (enhanced) {
|
|
/*
|
|
* Is this block long enough to be an EPB?
|
|
*/
|
|
if (bh->block_total_length < MIN_EPB_SIZE) {
|
|
/*
|
|
* No.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: total block length %u of an EPB is less than the minimum EPB size %u",
|
|
bh->block_total_length, MIN_EPB_SIZE);
|
|
return FALSE;
|
|
}
|
|
if (!wtap_read_bytes(fh, &epb, sizeof epb, err, err_info)) {
|
|
pcapng_debug("pcapng_read_packet_block: failed to read packet data");
|
|
return FALSE;
|
|
}
|
|
block_read = (guint)sizeof epb;
|
|
|
|
if (section_info->byte_swapped) {
|
|
packet.interface_id = GUINT32_SWAP_LE_BE(epb.interface_id);
|
|
packet.drops_count = -1; /* invalid */
|
|
packet.ts_high = GUINT32_SWAP_LE_BE(epb.timestamp_high);
|
|
packet.ts_low = GUINT32_SWAP_LE_BE(epb.timestamp_low);
|
|
packet.cap_len = GUINT32_SWAP_LE_BE(epb.captured_len);
|
|
packet.packet_len = GUINT32_SWAP_LE_BE(epb.packet_len);
|
|
} else {
|
|
packet.interface_id = epb.interface_id;
|
|
packet.drops_count = -1; /* invalid */
|
|
packet.ts_high = epb.timestamp_high;
|
|
packet.ts_low = epb.timestamp_low;
|
|
packet.cap_len = epb.captured_len;
|
|
packet.packet_len = epb.packet_len;
|
|
}
|
|
pcapng_debug("pcapng_read_packet_block: EPB on interface_id %d, cap_len %d, packet_len %d",
|
|
packet.interface_id, packet.cap_len, packet.packet_len);
|
|
} else {
|
|
/*
|
|
* Is this block long enough to be a PB?
|
|
*/
|
|
if (bh->block_total_length < MIN_PB_SIZE) {
|
|
/*
|
|
* No.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: total block length %u of a PB is less than the minimum PB size %u",
|
|
bh->block_total_length, MIN_PB_SIZE);
|
|
return FALSE;
|
|
}
|
|
if (!wtap_read_bytes(fh, &pb, sizeof pb, err, err_info)) {
|
|
pcapng_debug("pcapng_read_packet_block: failed to read packet data");
|
|
return FALSE;
|
|
}
|
|
block_read = (guint)sizeof pb;
|
|
|
|
if (section_info->byte_swapped) {
|
|
packet.interface_id = GUINT16_SWAP_LE_BE(pb.interface_id);
|
|
packet.drops_count = GUINT16_SWAP_LE_BE(pb.drops_count);
|
|
packet.ts_high = GUINT32_SWAP_LE_BE(pb.timestamp_high);
|
|
packet.ts_low = GUINT32_SWAP_LE_BE(pb.timestamp_low);
|
|
packet.cap_len = GUINT32_SWAP_LE_BE(pb.captured_len);
|
|
packet.packet_len = GUINT32_SWAP_LE_BE(pb.packet_len);
|
|
} else {
|
|
packet.interface_id = pb.interface_id;
|
|
packet.drops_count = pb.drops_count;
|
|
packet.ts_high = pb.timestamp_high;
|
|
packet.ts_low = pb.timestamp_low;
|
|
packet.cap_len = pb.captured_len;
|
|
packet.packet_len = pb.packet_len;
|
|
}
|
|
pcapng_debug("pcapng_read_packet_block: PB on interface_id %d, cap_len %d, packet_len %d",
|
|
packet.interface_id, packet.cap_len, packet.packet_len);
|
|
}
|
|
|
|
/*
|
|
* How much padding is there at the end of the packet data?
|
|
*/
|
|
if ((packet.cap_len % 4) != 0)
|
|
padding = 4 - (packet.cap_len % 4);
|
|
else
|
|
padding = 0;
|
|
|
|
/* add padding bytes to "block total length" */
|
|
/* (the "block total length" of some example files don't contain the packet data padding bytes!) */
|
|
if (bh->block_total_length % 4) {
|
|
block_total_length = bh->block_total_length + 4 - (bh->block_total_length % 4);
|
|
} else {
|
|
block_total_length = bh->block_total_length;
|
|
}
|
|
pcapng_debug("pcapng_read_packet_block: block_total_length %d", block_total_length);
|
|
|
|
/*
|
|
* Is this block long enough to hold the packet data?
|
|
*/
|
|
if (enhanced) {
|
|
if (block_total_length <
|
|
MIN_EPB_SIZE + packet.cap_len + padding) {
|
|
/*
|
|
* No.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: total block length %u of EPB is too small for %u bytes of packet data",
|
|
block_total_length, packet.cap_len);
|
|
return FALSE;
|
|
}
|
|
} else {
|
|
if (block_total_length <
|
|
MIN_PB_SIZE + packet.cap_len + padding) {
|
|
/*
|
|
* No.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: total block length %u of PB is too small for %u bytes of packet data",
|
|
block_total_length, packet.cap_len);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
pcapng_debug("pcapng_read_packet_block: packet data: packet_len %u captured_len %u interface_id %u",
|
|
packet.packet_len,
|
|
packet.cap_len,
|
|
packet.interface_id);
|
|
|
|
if (packet.interface_id >= section_info->interfaces->len) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: interface index %u is not less than section interface count %u",
|
|
packet.interface_id,
|
|
section_info->interfaces->len);
|
|
return FALSE;
|
|
}
|
|
iface_info = g_array_index(section_info->interfaces, interface_info_t,
|
|
packet.interface_id);
|
|
|
|
if (packet.cap_len > wtap_max_snaplen_for_encap(iface_info.wtap_encap)) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: cap_len %u is larger than %u",
|
|
packet.cap_len,
|
|
wtap_max_snaplen_for_encap(iface_info.wtap_encap));
|
|
return FALSE;
|
|
}
|
|
|
|
wblock->rec->rec_type = REC_TYPE_PACKET;
|
|
wblock->rec->presence_flags = WTAP_HAS_TS|WTAP_HAS_CAP_LEN|WTAP_HAS_INTERFACE_ID;
|
|
|
|
pcapng_debug("pcapng_read_packet_block: encapsulation = %d (%s), pseudo header size = %d.",
|
|
iface_info.wtap_encap,
|
|
wtap_encap_description(iface_info.wtap_encap),
|
|
pcap_get_phdr_size(iface_info.wtap_encap, &wblock->rec->rec_header.packet_header.pseudo_header));
|
|
wblock->rec->rec_header.packet_header.interface_id = packet.interface_id;
|
|
wblock->rec->rec_header.packet_header.pkt_encap = iface_info.wtap_encap;
|
|
wblock->rec->tsprec = iface_info.tsprecision;
|
|
|
|
memset((void *)&wblock->rec->rec_header.packet_header.pseudo_header, 0, sizeof(union wtap_pseudo_header));
|
|
pseudo_header_len = pcap_process_pseudo_header(fh,
|
|
WTAP_FILE_TYPE_SUBTYPE_PCAPNG,
|
|
iface_info.wtap_encap,
|
|
packet.cap_len,
|
|
wblock->rec,
|
|
err,
|
|
err_info);
|
|
if (pseudo_header_len < 0) {
|
|
return FALSE;
|
|
}
|
|
block_read += pseudo_header_len;
|
|
wblock->rec->rec_header.packet_header.caplen = packet.cap_len - pseudo_header_len;
|
|
wblock->rec->rec_header.packet_header.len = packet.packet_len - pseudo_header_len;
|
|
|
|
/* Combine the two 32-bit pieces of the timestamp into one 64-bit value */
|
|
ts = (((guint64)packet.ts_high) << 32) | ((guint64)packet.ts_low);
|
|
wblock->rec->ts.secs = (time_t)(ts / iface_info.time_units_per_second);
|
|
wblock->rec->ts.nsecs = (int)(((ts % iface_info.time_units_per_second) * 1000000000) / iface_info.time_units_per_second);
|
|
|
|
/* "(Enhanced) Packet Block" read capture data */
|
|
if (!wtap_read_packet_bytes(fh, wblock->frame_buffer,
|
|
packet.cap_len - pseudo_header_len, err, err_info))
|
|
return FALSE;
|
|
block_read += packet.cap_len - pseudo_header_len;
|
|
|
|
/* jump over potential padding bytes at end of the packet data */
|
|
if (padding != 0) {
|
|
if (!wtap_read_bytes(fh, NULL, padding, err, err_info))
|
|
return FALSE;
|
|
block_read += padding;
|
|
}
|
|
|
|
/* Option defaults */
|
|
g_free(wblock->rec->opt_comment); /* Free memory from an earlier read. */
|
|
wblock->rec->opt_comment = NULL;
|
|
wblock->rec->rec_header.packet_header.drop_count = -1;
|
|
wblock->rec->rec_header.packet_header.pack_flags = 0;
|
|
wblock->rec->rec_header.packet_header.packet_id = 0;
|
|
wblock->rec->rec_header.packet_header.interface_queue = 0;
|
|
if (wblock->rec->packet_verdict != NULL) {
|
|
g_ptr_array_free(wblock->rec->packet_verdict, TRUE);
|
|
wblock->rec->packet_verdict = NULL;
|
|
}
|
|
|
|
/* FCS length default */
|
|
fcslen = iface_info.fcslen;
|
|
|
|
/* Options
|
|
* opt_comment 1
|
|
* epb_flags 2
|
|
* epb_hash 3
|
|
* epb_dropcount 4
|
|
* epb_packetid 5
|
|
* epb_queue 6
|
|
* epb_verdict 7
|
|
*/
|
|
to_read = block_total_length -
|
|
(int)sizeof(pcapng_block_header_t) -
|
|
block_read - /* fixed and variable part, including padding */
|
|
(int)sizeof(bh->block_total_length);
|
|
|
|
/* Ensure sufficient temporary memory to hold all options. It is not freed
|
|
* on return to avoid frequent reallocations. When called for sequential
|
|
* read (wtap_read), "wblock->rec == &wth->rec" (options_buf will be freed
|
|
* by wtap_sequential_close). For random access, memory is managed by the
|
|
* caller of wtap_seek_read. */
|
|
opt_cont_buf_len = to_read;
|
|
ws_buffer_assure_space(&wblock->rec->options_buf, opt_cont_buf_len);
|
|
opt_ptr = ws_buffer_start_ptr(&wblock->rec->options_buf);
|
|
|
|
while (to_read != 0) {
|
|
/* read option */
|
|
oh = (pcapng_option_header_t *)(void *)opt_ptr;
|
|
option_content = opt_ptr + sizeof (pcapng_option_header_t);
|
|
bytes_read = pcapng_read_option(fh, section_info, oh, option_content, opt_cont_buf_len, to_read, err, err_info, "packet");
|
|
if (bytes_read <= 0) {
|
|
pcapng_debug("pcapng_read_packet_block: failed to read option");
|
|
/* XXX - free anything? */
|
|
return FALSE;
|
|
}
|
|
to_read -= bytes_read;
|
|
|
|
/* handle option content */
|
|
switch (oh->option_code) {
|
|
case(OPT_EOFOPT):
|
|
if (to_read != 0) {
|
|
pcapng_debug("pcapng_read_packet_block: %u bytes after opt_endofopt", to_read);
|
|
}
|
|
/* padding should be ok here, just get out of this */
|
|
to_read = 0;
|
|
break;
|
|
case(OPT_COMMENT):
|
|
if (oh->option_length > 0 && oh->option_length < opt_cont_buf_len) {
|
|
wblock->rec->presence_flags |= WTAP_HAS_COMMENTS;
|
|
g_free(wblock->rec->opt_comment);
|
|
wblock->rec->opt_comment = g_strndup((char *)option_content, oh->option_length);
|
|
pcapng_debug("pcapng_read_packet_block: length %u opt_comment '%s'", oh->option_length, wblock->rec->opt_comment);
|
|
} else {
|
|
pcapng_debug("pcapng_read_packet_block: opt_comment length %u seems strange", oh->option_length);
|
|
}
|
|
break;
|
|
case(OPT_EPB_FLAGS):
|
|
if (oh->option_length != 4) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: packet block flags option length %u is not 4",
|
|
oh->option_length);
|
|
/* XXX - free anything? */
|
|
return FALSE;
|
|
}
|
|
/* Don't cast a guint8 * into a guint32 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
wblock->rec->presence_flags |= WTAP_HAS_PACK_FLAGS;
|
|
memcpy(&wblock->rec->rec_header.packet_header.pack_flags, option_content, sizeof(guint32));
|
|
if (section_info->byte_swapped) {
|
|
wblock->rec->rec_header.packet_header.pack_flags = GUINT32_SWAP_LE_BE(wblock->rec->rec_header.packet_header.pack_flags);
|
|
memcpy(option_content, &wblock->rec->rec_header.packet_header.pack_flags, sizeof(guint32));
|
|
}
|
|
if (PACK_FLAGS_FCS_LENGTH(wblock->rec->rec_header.packet_header.pack_flags) != 0) {
|
|
/* The FCS length is present */
|
|
fcslen = PACK_FLAGS_FCS_LENGTH(wblock->rec->rec_header.packet_header.pack_flags);
|
|
}
|
|
pcapng_debug("pcapng_read_packet_block: pack_flags %u (ignored)", wblock->rec->rec_header.packet_header.pack_flags);
|
|
break;
|
|
case(OPT_EPB_HASH):
|
|
pcapng_debug("pcapng_read_packet_block: epb_hash %u currently not handled - ignoring %u bytes",
|
|
oh->option_code, oh->option_length);
|
|
break;
|
|
case(OPT_EPB_DROPCOUNT):
|
|
if (oh->option_length != 8) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: packet block drop count option length %u is not 8",
|
|
oh->option_length);
|
|
/* XXX - free anything? */
|
|
return FALSE;
|
|
}
|
|
/* Don't cast a guint8 * into a guint64 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
wblock->rec->presence_flags |= WTAP_HAS_DROP_COUNT;
|
|
memcpy(&wblock->rec->rec_header.packet_header.drop_count, option_content, sizeof(guint64));
|
|
if (section_info->byte_swapped) {
|
|
wblock->rec->rec_header.packet_header.drop_count = GUINT64_SWAP_LE_BE(wblock->rec->rec_header.packet_header.drop_count);
|
|
memcpy(option_content, &wblock->rec->rec_header.packet_header.drop_count, sizeof(guint64));
|
|
}
|
|
|
|
pcapng_debug("pcapng_read_packet_block: drop_count %" G_GINT64_MODIFIER "u", wblock->rec->rec_header.packet_header.drop_count);
|
|
break;
|
|
case(OPT_EPB_PACKETID):
|
|
if (oh->option_length != 8) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: packet block packet id option length %u is not 8",
|
|
oh->option_length);
|
|
/* XXX - free anything? */
|
|
return FALSE;
|
|
}
|
|
/* Don't cast a guint8 * into a guint64 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
wblock->rec->presence_flags |= WTAP_HAS_PACKET_ID;
|
|
memcpy(&wblock->rec->rec_header.packet_header.packet_id, option_content, sizeof(guint64));
|
|
if (section_info->byte_swapped) {
|
|
wblock->rec->rec_header.packet_header.packet_id = GUINT64_SWAP_LE_BE(wblock->rec->rec_header.packet_header.packet_id);
|
|
memcpy(option_content, &wblock->rec->rec_header.packet_header.packet_id, sizeof(guint64));
|
|
}
|
|
pcapng_debug("pcapng_read_packet_block: packet_id %" G_GINT64_MODIFIER "u", wblock->rec->rec_header.packet_header.packet_id);
|
|
break;
|
|
case(OPT_EPB_QUEUE):
|
|
if (oh->option_length != 4) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: packet block queue option length %u is not 4",
|
|
oh->option_length);
|
|
/* XXX - free anything? */
|
|
return FALSE;
|
|
}
|
|
/* Don't cast a guint8 * into a guint32 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
wblock->rec->presence_flags |= WTAP_HAS_INT_QUEUE;
|
|
memcpy(&wblock->rec->rec_header.packet_header.interface_queue, option_content, sizeof(guint32));
|
|
if (section_info->byte_swapped) {
|
|
wblock->rec->rec_header.packet_header.interface_queue = GUINT32_SWAP_LE_BE(wblock->rec->rec_header.packet_header.interface_queue);
|
|
memcpy(option_content, &wblock->rec->rec_header.packet_header.interface_queue, sizeof(guint32));
|
|
}
|
|
pcapng_debug("pcapng_read_packet_block: queue %u", wblock->rec->rec_header.packet_header.interface_queue);
|
|
break;
|
|
case(OPT_EPB_VERDICT):
|
|
if (oh->option_length < 1 ||
|
|
((option_content[0] == OPT_VERDICT_TYPE_TC ||
|
|
option_content[0] == OPT_VERDICT_TYPE_XDP) &&
|
|
oh->option_length != 9)) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
if (oh->option_length < 1)
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: packet block verdict option length %u is < 1",
|
|
oh->option_length);
|
|
else
|
|
*err_info = g_strdup_printf("pcapng_read_packet_block: packet block verdict option length %u is != 9",
|
|
oh->option_length);
|
|
/* XXX - free anything? */
|
|
return FALSE;
|
|
}
|
|
/* Silently ignore unknown options */
|
|
if (option_content[0] > OPT_VERDICT_TYPE_XDP)
|
|
continue;
|
|
|
|
if (wblock->rec->packet_verdict == NULL) {
|
|
wblock->rec->presence_flags |= WTAP_HAS_VERDICT;
|
|
wblock->rec->packet_verdict = g_ptr_array_new_with_free_func((GDestroyNotify) g_bytes_unref);
|
|
}
|
|
|
|
option_content_copy = g_memdup(option_content, oh->option_length);
|
|
|
|
/* For Linux XDP and TC we might need to byte swap */
|
|
if (section_info->byte_swapped &&
|
|
(option_content[0] == OPT_VERDICT_TYPE_TC ||
|
|
option_content[0] == OPT_VERDICT_TYPE_XDP)) {
|
|
guint64 result;
|
|
|
|
memcpy(&result, option_content + 1, sizeof(result));
|
|
result = GUINT64_SWAP_LE_BE(result);
|
|
memcpy(option_content + 1, &result, sizeof(result));
|
|
}
|
|
|
|
g_ptr_array_add(wblock->rec->packet_verdict,
|
|
g_bytes_new_with_free_func(option_content_copy,
|
|
oh->option_length,
|
|
g_free,
|
|
option_content_copy));
|
|
pcapng_debug("pcapng_read_packet_block: verdict type %u, data len %u",
|
|
option_content[0], oh->option_length - 1);
|
|
break;
|
|
default:
|
|
#ifdef HAVE_PLUGINS
|
|
/*
|
|
* Do we have a handler for this packet block option code?
|
|
*/
|
|
if (option_handlers[BT_INDEX_PBS] != NULL &&
|
|
(handler = (option_handler *)g_hash_table_lookup(option_handlers[BT_INDEX_PBS],
|
|
GUINT_TO_POINTER((guint)oh->option_code))) != NULL) {
|
|
/* Yes - call the handler. */
|
|
if (!handler->hfunc(section_info->byte_swapped,
|
|
oh->option_length, option_content,
|
|
err, err_info))
|
|
/* XXX - free anything? */
|
|
return FALSE;
|
|
} else
|
|
#endif
|
|
{
|
|
pcapng_debug("pcapng_read_packet_block: unknown option %u - ignoring %u bytes",
|
|
oh->option_code, oh->option_length);
|
|
}
|
|
}
|
|
}
|
|
|
|
pcap_read_post_process(WTAP_FILE_TYPE_SUBTYPE_PCAPNG, iface_info.wtap_encap,
|
|
wblock->rec, ws_buffer_start_ptr(wblock->frame_buffer),
|
|
section_info->byte_swapped, fcslen);
|
|
|
|
/*
|
|
* We return these to the caller in pcapng_read().
|
|
*/
|
|
wblock->internal = FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
pcapng_read_simple_packet_block(FILE_T fh, pcapng_block_header_t *bh,
|
|
const section_info_t *section_info,
|
|
wtapng_block_t *wblock,
|
|
int *err, gchar **err_info)
|
|
{
|
|
interface_info_t iface_info;
|
|
pcapng_simple_packet_block_t spb;
|
|
wtapng_simple_packet_t simple_packet;
|
|
guint32 block_total_length;
|
|
guint32 padding;
|
|
int pseudo_header_len;
|
|
|
|
/*
|
|
* Is this block long enough to be an SPB?
|
|
*/
|
|
if (bh->block_total_length < MIN_SPB_SIZE) {
|
|
/*
|
|
* No.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_simple_packet_block: total block length %u of an SPB is less than the minimum SPB size %u",
|
|
bh->block_total_length, MIN_SPB_SIZE);
|
|
return FALSE;
|
|
}
|
|
|
|
/* "Simple Packet Block" read fixed part */
|
|
if (!wtap_read_bytes(fh, &spb, sizeof spb, err, err_info)) {
|
|
pcapng_debug("pcapng_read_simple_packet_block: failed to read packet data");
|
|
return FALSE;
|
|
}
|
|
|
|
if (0 >= section_info->interfaces->len) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup("pcapng_read_simple_packet_block: SPB appeared before any IDBs in the section");
|
|
return FALSE;
|
|
}
|
|
iface_info = g_array_index(section_info->interfaces, interface_info_t, 0);
|
|
|
|
if (section_info->byte_swapped) {
|
|
simple_packet.packet_len = GUINT32_SWAP_LE_BE(spb.packet_len);
|
|
} else {
|
|
simple_packet.packet_len = spb.packet_len;
|
|
}
|
|
|
|
/*
|
|
* The captured length is not a field in the SPB; it can be
|
|
* calculated as the minimum of the snapshot length from the
|
|
* IDB and the packet length, as per the pcapng spec. An IDB
|
|
* snapshot length of 0 means no limit.
|
|
*/
|
|
simple_packet.cap_len = simple_packet.packet_len;
|
|
if (simple_packet.cap_len > iface_info.snap_len && iface_info.snap_len != 0)
|
|
simple_packet.cap_len = iface_info.snap_len;
|
|
|
|
/*
|
|
* How much padding is there at the end of the packet data?
|
|
*/
|
|
if ((simple_packet.cap_len % 4) != 0)
|
|
padding = 4 - (simple_packet.cap_len % 4);
|
|
else
|
|
padding = 0;
|
|
|
|
/* add padding bytes to "block total length" */
|
|
/* (the "block total length" of some example files don't contain the packet data padding bytes!) */
|
|
if (bh->block_total_length % 4) {
|
|
block_total_length = bh->block_total_length + 4 - (bh->block_total_length % 4);
|
|
} else {
|
|
block_total_length = bh->block_total_length;
|
|
}
|
|
pcapng_debug("pcapng_read_simple_packet_block: block_total_length %d", block_total_length);
|
|
|
|
/*
|
|
* Is this block long enough to hold the packet data?
|
|
*/
|
|
if (block_total_length < MIN_SPB_SIZE + simple_packet.cap_len + padding) {
|
|
/*
|
|
* No. That means that the problem is with the packet
|
|
* length; the snapshot length can be bigger than the amount
|
|
* of packet data in the block, as it's a *maximum* length,
|
|
* not a *minimum* length.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_simple_packet_block: total block length %u of PB is too small for %u bytes of packet data",
|
|
block_total_length, simple_packet.packet_len);
|
|
return FALSE;
|
|
}
|
|
|
|
if (simple_packet.cap_len > wtap_max_snaplen_for_encap(iface_info.wtap_encap)) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_simple_packet_block: cap_len %u is larger than %u",
|
|
simple_packet.cap_len,
|
|
wtap_max_snaplen_for_encap(iface_info.wtap_encap));
|
|
return FALSE;
|
|
}
|
|
pcapng_debug("pcapng_read_simple_packet_block: packet data: packet_len %u",
|
|
simple_packet.packet_len);
|
|
|
|
pcapng_debug("pcapng_read_simple_packet_block: Need to read pseudo header of size %d",
|
|
pcap_get_phdr_size(iface_info.wtap_encap, &wblock->rec->rec_header.packet_header.pseudo_header));
|
|
|
|
/* No time stamp in a simple packet block; no options, either */
|
|
wblock->rec->rec_type = REC_TYPE_PACKET;
|
|
wblock->rec->presence_flags = WTAP_HAS_CAP_LEN|WTAP_HAS_INTERFACE_ID;
|
|
wblock->rec->rec_header.packet_header.interface_id = 0;
|
|
wblock->rec->rec_header.packet_header.pkt_encap = iface_info.wtap_encap;
|
|
wblock->rec->tsprec = iface_info.tsprecision;
|
|
wblock->rec->ts.secs = 0;
|
|
wblock->rec->ts.nsecs = 0;
|
|
wblock->rec->rec_header.packet_header.interface_id = 0;
|
|
g_free(wblock->rec->opt_comment); /* Free memory from an earlier read. */
|
|
wblock->rec->opt_comment = NULL;
|
|
wblock->rec->rec_header.packet_header.drop_count = 0;
|
|
wblock->rec->rec_header.packet_header.pack_flags = 0;
|
|
wblock->rec->rec_header.packet_header.packet_id = 0;
|
|
wblock->rec->rec_header.packet_header.interface_queue = 0;
|
|
if (wblock->rec->packet_verdict != NULL) {
|
|
g_ptr_array_free(wblock->rec->packet_verdict, TRUE);
|
|
wblock->rec->packet_verdict = NULL;
|
|
}
|
|
|
|
memset((void *)&wblock->rec->rec_header.packet_header.pseudo_header, 0, sizeof(union wtap_pseudo_header));
|
|
pseudo_header_len = pcap_process_pseudo_header(fh,
|
|
WTAP_FILE_TYPE_SUBTYPE_PCAPNG,
|
|
iface_info.wtap_encap,
|
|
simple_packet.cap_len,
|
|
wblock->rec,
|
|
err,
|
|
err_info);
|
|
if (pseudo_header_len < 0) {
|
|
return FALSE;
|
|
}
|
|
wblock->rec->rec_header.packet_header.caplen = simple_packet.cap_len - pseudo_header_len;
|
|
wblock->rec->rec_header.packet_header.len = simple_packet.packet_len - pseudo_header_len;
|
|
|
|
memset((void *)&wblock->rec->rec_header.packet_header.pseudo_header, 0, sizeof(union wtap_pseudo_header));
|
|
|
|
/* "Simple Packet Block" read capture data */
|
|
if (!wtap_read_packet_bytes(fh, wblock->frame_buffer,
|
|
simple_packet.cap_len, err, err_info))
|
|
return FALSE;
|
|
|
|
/* jump over potential padding bytes at end of the packet data */
|
|
if ((simple_packet.cap_len % 4) != 0) {
|
|
if (!wtap_read_bytes(fh, NULL, 4 - (simple_packet.cap_len % 4), err, err_info))
|
|
return FALSE;
|
|
}
|
|
|
|
pcap_read_post_process(WTAP_FILE_TYPE_SUBTYPE_PCAPNG, iface_info.wtap_encap,
|
|
wblock->rec, ws_buffer_start_ptr(wblock->frame_buffer),
|
|
section_info->byte_swapped, iface_info.fcslen);
|
|
|
|
/*
|
|
* We return these to the caller in pcapng_read().
|
|
*/
|
|
wblock->internal = FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#define NRES_ENDOFRECORD 0
|
|
#define NRES_IP4RECORD 1
|
|
#define NRES_IP6RECORD 2
|
|
#define PADDING4(x) ((((x + 3) >> 2) << 2) - x)
|
|
/* IPv6 + MAXNAMELEN */
|
|
#define INITIAL_NRB_REC_SIZE (16 + 64)
|
|
|
|
/*
|
|
* Find the end of the NUL-terminated name the beginning of which is pointed
|
|
* to by p; record_len is the number of bytes remaining in the record.
|
|
*
|
|
* Return the length of the name, including the terminating NUL.
|
|
*
|
|
* If we don't find a terminating NUL, return -1 and set *err and
|
|
* *err_info appropriately.
|
|
*/
|
|
static int
|
|
name_resolution_block_find_name_end(const char *p, guint record_len, int *err,
|
|
gchar **err_info)
|
|
{
|
|
int namelen;
|
|
|
|
namelen = 0;
|
|
for (;;) {
|
|
if (record_len == 0) {
|
|
/*
|
|
* We ran out of bytes in the record without
|
|
* finding a NUL.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup("pcapng_read_name_resolution_block: NRB record has non-null-terminated host name");
|
|
return -1;
|
|
}
|
|
if (*p == '\0')
|
|
break; /* that's the terminating NUL */
|
|
p++;
|
|
record_len--;
|
|
namelen++; /* count this byte */
|
|
}
|
|
|
|
/* Include the NUL in the name length. */
|
|
return namelen + 1;
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_read_name_resolution_block(FILE_T fh, pcapng_block_header_t *bh,
|
|
pcapng_t *pn,
|
|
const section_info_t *section_info,
|
|
wtapng_block_t *wblock,
|
|
int *err, gchar **err_info)
|
|
{
|
|
int block_read;
|
|
int to_read;
|
|
pcapng_name_resolution_block_t nrb;
|
|
Buffer nrb_rec;
|
|
guint32 v4_addr;
|
|
guint record_len, opt_cont_buf_len;
|
|
char *namep;
|
|
int namelen;
|
|
int bytes_read;
|
|
pcapng_option_header_t oh;
|
|
guint8 *option_content;
|
|
#ifdef HAVE_PLUGINS
|
|
option_handler *handler;
|
|
#endif
|
|
gchar* tmp_content;
|
|
|
|
/*
|
|
* Is this block long enough to be an NRB?
|
|
*/
|
|
if (bh->block_total_length < MIN_NRB_SIZE) {
|
|
/*
|
|
* No.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_name_resolution_block: total block length %u of an NRB is less than the minimum NRB size %u",
|
|
bh->block_total_length, MIN_NRB_SIZE);
|
|
return FALSE;
|
|
}
|
|
|
|
to_read = bh->block_total_length - 8 - 4; /* We have read the header and should not read the final block_total_length */
|
|
|
|
pcapng_debug("pcapng_read_name_resolution_block, total %d bytes", bh->block_total_length);
|
|
|
|
/* Ensure we have a name resolution block */
|
|
if (wblock->block == NULL) {
|
|
wblock->block = wtap_block_create(WTAP_BLOCK_NG_NRB);
|
|
}
|
|
|
|
/*
|
|
* Start out with a buffer big enough for an IPv6 address and one
|
|
* 64-byte name; we'll make the buffer bigger if necessary.
|
|
*/
|
|
ws_buffer_init(&nrb_rec, INITIAL_NRB_REC_SIZE);
|
|
block_read = 0;
|
|
while (block_read < to_read) {
|
|
/*
|
|
* There must be at least one record's worth of data
|
|
* here.
|
|
*/
|
|
if ((size_t)(to_read - block_read) < sizeof nrb) {
|
|
ws_buffer_free(&nrb_rec);
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_name_resolution_block: %d bytes left in the block < NRB record header size %u",
|
|
to_read - block_read,
|
|
(guint)sizeof nrb);
|
|
return FALSE;
|
|
}
|
|
if (!wtap_read_bytes(fh, &nrb, sizeof nrb, err, err_info)) {
|
|
ws_buffer_free(&nrb_rec);
|
|
pcapng_debug("pcapng_read_name_resolution_block: failed to read record header");
|
|
return FALSE;
|
|
}
|
|
block_read += (int)sizeof nrb;
|
|
|
|
if (section_info->byte_swapped) {
|
|
nrb.record_type = GUINT16_SWAP_LE_BE(nrb.record_type);
|
|
nrb.record_len = GUINT16_SWAP_LE_BE(nrb.record_len);
|
|
}
|
|
|
|
if (to_read - block_read < nrb.record_len + PADDING4(nrb.record_len)) {
|
|
ws_buffer_free(&nrb_rec);
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_name_resolution_block: %d bytes left in the block < NRB record length + padding %u",
|
|
to_read - block_read,
|
|
nrb.record_len + PADDING4(nrb.record_len));
|
|
return FALSE;
|
|
}
|
|
switch (nrb.record_type) {
|
|
case NRES_ENDOFRECORD:
|
|
/* There shouldn't be any more data - but there MAY be options */
|
|
goto read_options;
|
|
break;
|
|
case NRES_IP4RECORD:
|
|
/*
|
|
* The smallest possible record must have
|
|
* a 4-byte IPv4 address, hence a minimum
|
|
* of 4 bytes.
|
|
*
|
|
* (The pcapng spec really indicates
|
|
* that it must be at least 5 bytes,
|
|
* as there must be at least one name,
|
|
* and it really must be at least 6
|
|
* bytes, as the name mustn't be null,
|
|
* but there's no need to fail if there
|
|
* aren't any names at all, and we
|
|
* should report a null name as such.)
|
|
*/
|
|
if (nrb.record_len < 4) {
|
|
ws_buffer_free(&nrb_rec);
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_name_resolution_block: NRB record length for IPv4 record %u < minimum length 4",
|
|
nrb.record_len);
|
|
return FALSE;
|
|
}
|
|
ws_buffer_assure_space(&nrb_rec, nrb.record_len);
|
|
if (!wtap_read_bytes(fh, ws_buffer_start_ptr(&nrb_rec),
|
|
nrb.record_len, err, err_info)) {
|
|
ws_buffer_free(&nrb_rec);
|
|
pcapng_debug("pcapng_read_name_resolution_block: failed to read IPv4 record data");
|
|
return FALSE;
|
|
}
|
|
block_read += nrb.record_len;
|
|
|
|
if (pn->add_new_ipv4) {
|
|
/*
|
|
* Scan through all the names in
|
|
* the record and add them.
|
|
*/
|
|
memcpy(&v4_addr,
|
|
ws_buffer_start_ptr(&nrb_rec), 4);
|
|
/* IPv4 address is in big-endian order in the file always, which is how we store
|
|
it internally as well, so don't byte-swap it */
|
|
for (namep = (char *)ws_buffer_start_ptr(&nrb_rec) + 4, record_len = nrb.record_len - 4;
|
|
record_len != 0;
|
|
namep += namelen, record_len -= namelen) {
|
|
/*
|
|
* Scan forward for a null
|
|
* byte.
|
|
*/
|
|
namelen = name_resolution_block_find_name_end(namep, record_len, err, err_info);
|
|
if (namelen == -1) {
|
|
ws_buffer_free(&nrb_rec);
|
|
return FALSE; /* fail */
|
|
}
|
|
pn->add_new_ipv4(v4_addr, namep);
|
|
}
|
|
}
|
|
|
|
if (!wtap_read_bytes(fh, NULL, PADDING4(nrb.record_len), err, err_info)) {
|
|
ws_buffer_free(&nrb_rec);
|
|
return FALSE;
|
|
}
|
|
block_read += PADDING4(nrb.record_len);
|
|
break;
|
|
case NRES_IP6RECORD:
|
|
/*
|
|
* The smallest possible record must have
|
|
* a 16-byte IPv6 address, hence a minimum
|
|
* of 16 bytes.
|
|
*
|
|
* (The pcapng spec really indicates
|
|
* that it must be at least 17 bytes,
|
|
* as there must be at least one name,
|
|
* and it really must be at least 18
|
|
* bytes, as the name mustn't be null,
|
|
* but there's no need to fail if there
|
|
* aren't any names at all, and we
|
|
* should report a null name as such.)
|
|
*/
|
|
if (nrb.record_len < 16) {
|
|
ws_buffer_free(&nrb_rec);
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_name_resolution_block: NRB record length for IPv6 record %u < minimum length 16",
|
|
nrb.record_len);
|
|
return FALSE;
|
|
}
|
|
if (to_read < nrb.record_len) {
|
|
ws_buffer_free(&nrb_rec);
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_name_resolution_block: NRB record length for IPv6 record %u > remaining data in NRB",
|
|
nrb.record_len);
|
|
return FALSE;
|
|
}
|
|
ws_buffer_assure_space(&nrb_rec, nrb.record_len);
|
|
if (!wtap_read_bytes(fh, ws_buffer_start_ptr(&nrb_rec),
|
|
nrb.record_len, err, err_info)) {
|
|
ws_buffer_free(&nrb_rec);
|
|
return FALSE;
|
|
}
|
|
block_read += nrb.record_len;
|
|
|
|
if (pn->add_new_ipv6) {
|
|
for (namep = (char *)ws_buffer_start_ptr(&nrb_rec) + 16, record_len = nrb.record_len - 16;
|
|
record_len != 0;
|
|
namep += namelen, record_len -= namelen) {
|
|
/*
|
|
* Scan forward for a null
|
|
* byte.
|
|
*/
|
|
namelen = name_resolution_block_find_name_end(namep, record_len, err, err_info);
|
|
if (namelen == -1) {
|
|
ws_buffer_free(&nrb_rec);
|
|
return FALSE; /* fail */
|
|
}
|
|
pn->add_new_ipv6(ws_buffer_start_ptr(&nrb_rec),
|
|
namep);
|
|
}
|
|
}
|
|
|
|
if (!wtap_read_bytes(fh, NULL, PADDING4(nrb.record_len), err, err_info)) {
|
|
ws_buffer_free(&nrb_rec);
|
|
return FALSE;
|
|
}
|
|
block_read += PADDING4(nrb.record_len);
|
|
break;
|
|
default:
|
|
pcapng_debug("pcapng_read_name_resolution_block: unknown record type 0x%x", nrb.record_type);
|
|
if (!wtap_read_bytes(fh, NULL, nrb.record_len + PADDING4(nrb.record_len), err, err_info)) {
|
|
ws_buffer_free(&nrb_rec);
|
|
return FALSE;
|
|
}
|
|
block_read += nrb.record_len + PADDING4(nrb.record_len);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
read_options:
|
|
to_read -= block_read;
|
|
|
|
/* Options
|
|
* opt_comment 1
|
|
*
|
|
* TODO:
|
|
* ns_dnsname 2
|
|
* ns_dnsIP4addr 3
|
|
* ns_dnsIP6addr 4
|
|
*/
|
|
|
|
/* Allocate enough memory to hold all options */
|
|
opt_cont_buf_len = to_read;
|
|
option_content = (guint8 *)g_try_malloc(opt_cont_buf_len);
|
|
if (opt_cont_buf_len != 0 && option_content == NULL) {
|
|
*err = ENOMEM; /* we assume we're out of memory */
|
|
ws_buffer_free(&nrb_rec);
|
|
return FALSE;
|
|
}
|
|
|
|
while (to_read != 0) {
|
|
/* read option */
|
|
bytes_read = pcapng_read_option(fh, section_info, &oh, option_content, opt_cont_buf_len, to_read, err, err_info, "name_resolution");
|
|
if (bytes_read <= 0) {
|
|
pcapng_debug("pcapng_read_name_resolution_block: failed to read option");
|
|
g_free(option_content);
|
|
ws_buffer_free(&nrb_rec);
|
|
return FALSE;
|
|
}
|
|
to_read -= bytes_read;
|
|
|
|
/* handle option content */
|
|
switch (oh.option_code) {
|
|
case(OPT_EOFOPT):
|
|
if (to_read != 0) {
|
|
pcapng_debug("pcapng_read_name_resolution_block: %u bytes after opt_endofopt", to_read);
|
|
}
|
|
/* padding should be ok here, just get out of this */
|
|
to_read = 0;
|
|
break;
|
|
case(OPT_COMMENT):
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
tmp_content = g_strndup((char *)option_content, oh.option_length);
|
|
wtap_block_add_string_option(wblock->block, OPT_COMMENT, option_content, oh.option_length);
|
|
pcapng_debug("pcapng_read_name_resolution_block: length %u opt_comment '%s'", oh.option_length, tmp_content);
|
|
g_free(tmp_content);
|
|
} else {
|
|
pcapng_debug("pcapng_read_name_resolution_block: opt_comment length %u seems strange", oh.option_length);
|
|
}
|
|
break;
|
|
default:
|
|
#ifdef HAVE_PLUGINS
|
|
/*
|
|
* Do we have a handler for this network resolution block option code?
|
|
*/
|
|
if (option_handlers[BT_INDEX_NRB] != NULL &&
|
|
(handler = (option_handler *)g_hash_table_lookup(option_handlers[BT_INDEX_NRB],
|
|
GUINT_TO_POINTER((guint)oh.option_code))) != NULL) {
|
|
/* Yes - call the handler. */
|
|
if (!handler->hfunc(section_info->byte_swapped,
|
|
oh.option_length, option_content,
|
|
err, err_info)) {
|
|
|
|
g_free(option_content);
|
|
ws_buffer_free(&nrb_rec);
|
|
return FALSE;
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
pcapng_debug("pcapng_read_name_resolution_block: unknown option %u - ignoring %u bytes",
|
|
oh.option_code, oh.option_length);
|
|
}
|
|
}
|
|
}
|
|
|
|
g_free(option_content);
|
|
ws_buffer_free(&nrb_rec);
|
|
|
|
/*
|
|
* We don't return these to the caller in pcapng_read().
|
|
*/
|
|
wblock->internal = TRUE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_read_interface_statistics_block(FILE_T fh, pcapng_block_header_t *bh,
|
|
const section_info_t *section_info,
|
|
wtapng_block_t *wblock,
|
|
int *err, gchar **err_info)
|
|
{
|
|
int bytes_read;
|
|
guint to_read, opt_cont_buf_len;
|
|
pcapng_interface_statistics_block_t isb;
|
|
pcapng_option_header_t oh;
|
|
guint8 *option_content = NULL; /* Allocate as large as the options block */
|
|
wtapng_if_stats_mandatory_t* if_stats_mand;
|
|
char* tmp_content;
|
|
|
|
/*
|
|
* Is this block long enough to be an ISB?
|
|
*/
|
|
if (bh->block_total_length < MIN_ISB_SIZE) {
|
|
/*
|
|
* No.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_interface_statistics_block: total block length %u is too small (< %u)",
|
|
bh->block_total_length, MIN_ISB_SIZE);
|
|
return FALSE;
|
|
}
|
|
|
|
/* "Interface Statistics Block" read fixed part */
|
|
if (!wtap_read_bytes(fh, &isb, sizeof isb, err, err_info)) {
|
|
pcapng_debug("pcapng_read_interface_statistics_block: failed to read packet data");
|
|
return FALSE;
|
|
}
|
|
|
|
wblock->block = wtap_block_create(WTAP_BLOCK_IF_STATS);
|
|
if_stats_mand = (wtapng_if_stats_mandatory_t*)wtap_block_get_mandatory_data(wblock->block);
|
|
if (section_info->byte_swapped) {
|
|
if_stats_mand->interface_id = GUINT32_SWAP_LE_BE(isb.interface_id);
|
|
if_stats_mand->ts_high = GUINT32_SWAP_LE_BE(isb.timestamp_high);
|
|
if_stats_mand->ts_low = GUINT32_SWAP_LE_BE(isb.timestamp_low);
|
|
} else {
|
|
if_stats_mand->interface_id = isb.interface_id;
|
|
if_stats_mand->ts_high = isb.timestamp_high;
|
|
if_stats_mand->ts_low = isb.timestamp_low;
|
|
}
|
|
pcapng_debug("pcapng_read_interface_statistics_block: interface_id %u", if_stats_mand->interface_id);
|
|
|
|
/* Options */
|
|
to_read = bh->block_total_length -
|
|
(MIN_BLOCK_SIZE + (guint)sizeof isb); /* fixed and variable part, including padding */
|
|
|
|
/* Allocate enough memory to hold all options */
|
|
opt_cont_buf_len = to_read;
|
|
option_content = (guint8 *)g_try_malloc(opt_cont_buf_len);
|
|
if (opt_cont_buf_len != 0 && option_content == NULL) {
|
|
*err = ENOMEM; /* we assume we're out of memory */
|
|
return FALSE;
|
|
}
|
|
|
|
while (to_read != 0) {
|
|
/* read option */
|
|
bytes_read = pcapng_read_option(fh, section_info, &oh, option_content, opt_cont_buf_len, to_read, err, err_info, "interface_statistics");
|
|
if (bytes_read <= 0) {
|
|
pcapng_debug("pcapng_read_interface_statistics_block: failed to read option");
|
|
g_free(option_content);
|
|
return FALSE;
|
|
}
|
|
to_read -= bytes_read;
|
|
|
|
/* handle option content */
|
|
switch (oh.option_code) {
|
|
case(OPT_EOFOPT): /* opt_endofopt */
|
|
if (to_read != 0) {
|
|
pcapng_debug("pcapng_read_interface_statistics_block: %u bytes after opt_endofopt", to_read);
|
|
}
|
|
/* padding should be ok here, just get out of this */
|
|
to_read = 0;
|
|
break;
|
|
case(OPT_COMMENT): /* opt_comment */
|
|
if (oh.option_length > 0 && oh.option_length < opt_cont_buf_len) {
|
|
tmp_content = g_strndup((char *)option_content, oh.option_length);
|
|
wtap_block_add_string_option(wblock->block, OPT_COMMENT, option_content, oh.option_length);
|
|
pcapng_debug("pcapng_read_interface_statistics_block: opt_comment %s", tmp_content);
|
|
g_free(tmp_content);
|
|
} else {
|
|
pcapng_debug("pcapng_read_interface_statistics_block: opt_comment length %u seems strange", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_ISB_STARTTIME): /* isb_starttime */
|
|
if (oh.option_length == 8) {
|
|
guint32 high, low;
|
|
guint64 starttime;
|
|
|
|
/* Don't cast a guint8 * into a guint32 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
memcpy(&high, option_content, sizeof(guint32));
|
|
memcpy(&low, option_content + sizeof(guint32), sizeof(guint32));
|
|
if (section_info->byte_swapped) {
|
|
high = GUINT32_SWAP_LE_BE(high);
|
|
low = GUINT32_SWAP_LE_BE(low);
|
|
}
|
|
starttime = (guint64)high;
|
|
starttime <<= 32;
|
|
starttime += (guint64)low;
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_uint64_option(wblock->block, OPT_ISB_STARTTIME, starttime);
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_starttime %" G_GINT64_MODIFIER "u", starttime);
|
|
} else {
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_starttime length %u not 8 as expected", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_ISB_ENDTIME): /* isb_endtime */
|
|
if (oh.option_length == 8) {
|
|
guint32 high, low;
|
|
guint64 endtime;
|
|
|
|
/* Don't cast a guint8 * into a guint32 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
memcpy(&high, option_content, sizeof(guint32));
|
|
memcpy(&low, option_content + sizeof(guint32), sizeof(guint32));
|
|
if (section_info->byte_swapped) {
|
|
high = GUINT32_SWAP_LE_BE(high);
|
|
low = GUINT32_SWAP_LE_BE(low);
|
|
}
|
|
endtime = (guint64)high;
|
|
endtime <<= 32;
|
|
endtime += (guint64)low;
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_uint64_option(wblock->block, OPT_ISB_ENDTIME, endtime);
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_endtime %" G_GINT64_MODIFIER "u", endtime);
|
|
} else {
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_starttime length %u not 8 as expected", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_ISB_IFRECV): /* isb_ifrecv */
|
|
if (oh.option_length == 8) {
|
|
guint64 ifrecv;
|
|
/* Don't cast a guint8 * into a guint64 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
memcpy(&ifrecv, option_content, sizeof(guint64));
|
|
if (section_info->byte_swapped)
|
|
ifrecv = GUINT64_SWAP_LE_BE(ifrecv);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_uint64_option(wblock->block, OPT_ISB_IFRECV, ifrecv);
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_ifrecv %" G_GINT64_MODIFIER "u", ifrecv);
|
|
} else {
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_ifrecv length %u not 8 as expected", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_ISB_IFDROP): /* isb_ifdrop */
|
|
if (oh.option_length == 8) {
|
|
guint64 ifdrop;
|
|
/* Don't cast a guint8 * into a guint64 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
memcpy(&ifdrop, option_content, sizeof(guint64));
|
|
if (section_info->byte_swapped)
|
|
ifdrop = GUINT64_SWAP_LE_BE(ifdrop);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_uint64_option(wblock->block, OPT_ISB_IFDROP, ifdrop);
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_ifdrop %" G_GINT64_MODIFIER "u", ifdrop);
|
|
} else {
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_ifdrop length %u not 8 as expected", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_ISB_FILTERACCEPT): /* isb_filteraccept 6 */
|
|
if (oh.option_length == 8) {
|
|
guint64 filteraccept;
|
|
/* Don't cast a guint8 * into a guint64 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
memcpy(&filteraccept, option_content, sizeof(guint64));
|
|
if (section_info->byte_swapped)
|
|
filteraccept = GUINT64_SWAP_LE_BE(filteraccept);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_uint64_option(wblock->block, OPT_ISB_FILTERACCEPT, filteraccept);
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_filteraccept %" G_GINT64_MODIFIER "u", filteraccept);
|
|
} else {
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_filteraccept length %u not 8 as expected", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_ISB_OSDROP): /* isb_osdrop 7 */
|
|
if (oh.option_length == 8) {
|
|
guint64 osdrop;
|
|
/* Don't cast a guint8 * into a guint64 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
memcpy(&osdrop, option_content, sizeof(guint64));
|
|
if (section_info->byte_swapped)
|
|
osdrop = GUINT64_SWAP_LE_BE(osdrop);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_uint64_option(wblock->block, OPT_ISB_OSDROP, osdrop);
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_osdrop %" G_GINT64_MODIFIER "u", osdrop);
|
|
} else {
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_osdrop length %u not 8 as expected", oh.option_length);
|
|
}
|
|
break;
|
|
case(OPT_ISB_USRDELIV): /* isb_usrdeliv 8 */
|
|
if (oh.option_length == 8) {
|
|
guint64 usrdeliv;
|
|
/* Don't cast a guint8 * into a guint64 *--the
|
|
* guint8 * may not point to something that's
|
|
* aligned correctly.
|
|
*/
|
|
memcpy(&usrdeliv, option_content, sizeof(guint64));
|
|
if (section_info->byte_swapped)
|
|
usrdeliv = GUINT64_SWAP_LE_BE(usrdeliv);
|
|
/* Fails with multiple options; we silently ignore the failure */
|
|
wtap_block_add_uint64_option(wblock->block, OPT_ISB_USRDELIV, usrdeliv);
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_usrdeliv %" G_GINT64_MODIFIER "u", usrdeliv);
|
|
} else {
|
|
pcapng_debug("pcapng_read_interface_statistics_block: isb_usrdeliv length %u not 8 as expected", oh.option_length);
|
|
}
|
|
break;
|
|
default:
|
|
pcapng_debug("pcapng_read_interface_statistics_block: unknown option %u - ignoring %u bytes",
|
|
oh.option_code, oh.option_length);
|
|
}
|
|
}
|
|
|
|
g_free(option_content);
|
|
|
|
/*
|
|
* We don't return these to the caller in pcapng_read().
|
|
*/
|
|
wblock->internal = TRUE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_read_sysdig_event_block(FILE_T fh, pcapng_block_header_t *bh,
|
|
const section_info_t *section_info,
|
|
wtapng_block_t *wblock,
|
|
int *err, gchar **err_info)
|
|
{
|
|
unsigned block_read;
|
|
guint32 block_total_length;
|
|
guint16 cpu_id;
|
|
guint64 wire_ts;
|
|
guint64 ts;
|
|
guint64 thread_id;
|
|
guint32 event_len;
|
|
guint16 event_type;
|
|
|
|
if (bh->block_total_length < MIN_SYSDIG_EVENT_SIZE) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("%s: total block length %u is too small (< %u)", G_STRFUNC,
|
|
bh->block_total_length, MIN_SYSDIG_EVENT_SIZE);
|
|
return FALSE;
|
|
}
|
|
|
|
/* add padding bytes to "block total length" */
|
|
/* (the "block total length" of some example files don't contain any padding bytes!) */
|
|
if (bh->block_total_length % 4) {
|
|
block_total_length = bh->block_total_length + 4 - (bh->block_total_length % 4);
|
|
} else {
|
|
block_total_length = bh->block_total_length;
|
|
}
|
|
|
|
pcapng_debug("pcapng_read_sysdig_event_block: block_total_length %u",
|
|
bh->block_total_length);
|
|
|
|
wblock->rec->rec_type = REC_TYPE_SYSCALL;
|
|
wblock->rec->rec_header.syscall_header.record_type = BLOCK_TYPE_SYSDIG_EVENT;
|
|
wblock->rec->presence_flags = WTAP_HAS_TS|WTAP_HAS_CAP_LEN /*|WTAP_HAS_INTERFACE_ID */;
|
|
wblock->rec->tsprec = WTAP_TSPREC_NSEC;
|
|
|
|
block_read = block_total_length;
|
|
|
|
if (!wtap_read_bytes(fh, &cpu_id, sizeof cpu_id, err, err_info)) {
|
|
pcapng_debug("pcapng_read_packet_block: failed to read sysdig event cpu id");
|
|
return FALSE;
|
|
}
|
|
if (!wtap_read_bytes(fh, &wire_ts, sizeof wire_ts, err, err_info)) {
|
|
pcapng_debug("pcapng_read_packet_block: failed to read sysdig event timestamp");
|
|
return FALSE;
|
|
}
|
|
if (!wtap_read_bytes(fh, &thread_id, sizeof thread_id, err, err_info)) {
|
|
pcapng_debug("pcapng_read_packet_block: failed to read sysdig event thread id");
|
|
return FALSE;
|
|
}
|
|
if (!wtap_read_bytes(fh, &event_len, sizeof event_len, err, err_info)) {
|
|
pcapng_debug("pcapng_read_packet_block: failed to read sysdig event length");
|
|
return FALSE;
|
|
}
|
|
if (!wtap_read_bytes(fh, &event_type, sizeof event_type, err, err_info)) {
|
|
pcapng_debug("pcapng_read_packet_block: failed to read sysdig event type");
|
|
return FALSE;
|
|
}
|
|
|
|
block_read -= MIN_SYSDIG_EVENT_SIZE;
|
|
wblock->rec->rec_header.syscall_header.byte_order = G_BYTE_ORDER;
|
|
|
|
/* XXX Use Gxxx_FROM_LE macros instead? */
|
|
if (section_info->byte_swapped) {
|
|
wblock->rec->rec_header.syscall_header.byte_order =
|
|
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
|
|
G_BIG_ENDIAN;
|
|
#else
|
|
G_LITTLE_ENDIAN;
|
|
#endif
|
|
wblock->rec->rec_header.syscall_header.cpu_id = GUINT16_SWAP_LE_BE(cpu_id);
|
|
ts = GUINT64_SWAP_LE_BE(wire_ts);
|
|
wblock->rec->rec_header.syscall_header.thread_id = GUINT64_SWAP_LE_BE(thread_id);
|
|
wblock->rec->rec_header.syscall_header.event_len = GUINT32_SWAP_LE_BE(event_len);
|
|
wblock->rec->rec_header.syscall_header.event_type = GUINT16_SWAP_LE_BE(event_type);
|
|
} else {
|
|
wblock->rec->rec_header.syscall_header.cpu_id = cpu_id;
|
|
ts = wire_ts;
|
|
wblock->rec->rec_header.syscall_header.thread_id = thread_id;
|
|
wblock->rec->rec_header.syscall_header.event_len = event_len;
|
|
wblock->rec->rec_header.syscall_header.event_type = event_type;
|
|
}
|
|
|
|
wblock->rec->ts.secs = (time_t) (ts / 1000000000);
|
|
wblock->rec->ts.nsecs = (int) (ts % 1000000000);
|
|
|
|
wblock->rec->rec_header.syscall_header.event_filelen = block_read;
|
|
|
|
/* "Sysdig Event Block" read event data */
|
|
if (!wtap_read_packet_bytes(fh, wblock->frame_buffer,
|
|
block_read, err, err_info))
|
|
return FALSE;
|
|
|
|
/* XXX Read comment? */
|
|
|
|
/*
|
|
* We return these to the caller in pcapng_read().
|
|
*/
|
|
wblock->internal = FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_read_systemd_journal_export_block(wtap *wth, FILE_T fh, pcapng_block_header_t *bh, pcapng_t *pn _U_, wtapng_block_t *wblock, int *err, gchar **err_info)
|
|
{
|
|
guint32 entry_length;
|
|
guint32 block_total_length;
|
|
guint64 rt_ts;
|
|
|
|
if (bh->block_total_length < MIN_SYSTEMD_JOURNAL_EXPORT_BLOCK_SIZE) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("%s: total block length %u is too small (< %u)", G_STRFUNC,
|
|
bh->block_total_length, MIN_SYSTEMD_JOURNAL_EXPORT_BLOCK_SIZE);
|
|
return FALSE;
|
|
}
|
|
|
|
/* add padding bytes to "block total length" */
|
|
/* (the "block total length" of some example files don't contain any padding bytes!) */
|
|
if (bh->block_total_length % 4) {
|
|
block_total_length = bh->block_total_length + 4 - (bh->block_total_length % 4);
|
|
} else {
|
|
block_total_length = bh->block_total_length;
|
|
}
|
|
|
|
pcapng_debug("%s: block_total_length %u", G_STRFUNC, bh->block_total_length);
|
|
|
|
entry_length = block_total_length - MIN_BLOCK_SIZE;
|
|
|
|
/* Includes padding bytes. */
|
|
if (!wtap_read_packet_bytes(fh, wblock->frame_buffer,
|
|
entry_length, err, err_info)) {
|
|
return FALSE;
|
|
}
|
|
ws_buffer_increase_length(wblock->frame_buffer, entry_length);
|
|
|
|
/* We don't have memmem available everywhere, so we get to use strstr. */
|
|
ws_buffer_append(wblock->frame_buffer, (guint8 * ) "", 1);
|
|
|
|
gchar *buf_ptr = (gchar *) ws_buffer_start_ptr(wblock->frame_buffer);
|
|
while (entry_length > 0 && buf_ptr[entry_length] == '\0') {
|
|
entry_length--;
|
|
}
|
|
|
|
if (entry_length < MIN_SYSTEMD_JOURNAL_EXPORT_ENTRY_SIZE) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("%s: entry length %u is too small (< %u)", G_STRFUNC,
|
|
bh->block_total_length, MIN_SYSTEMD_JOURNAL_EXPORT_ENTRY_SIZE);
|
|
return FALSE;
|
|
}
|
|
|
|
pcapng_debug("%s: entry_length %u", G_STRFUNC, entry_length);
|
|
|
|
size_t rt_ts_len = strlen(SDJ__REALTIME_TIMESTAMP);
|
|
char *ts_pos = strstr(buf_ptr, SDJ__REALTIME_TIMESTAMP);
|
|
|
|
if (!ts_pos) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("%s: no timestamp", G_STRFUNC);
|
|
return FALSE;
|
|
}
|
|
|
|
if (ts_pos+rt_ts_len >= (char *) buf_ptr+entry_length) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("%s: timestamp past end of buffer", G_STRFUNC);
|
|
return FALSE;
|
|
}
|
|
|
|
errno = 0;
|
|
const char *ts_end;
|
|
gboolean ok = ws_strtou64(ts_pos+rt_ts_len, &ts_end, &rt_ts);
|
|
|
|
if (!ok) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("%s: invalid timestamp", G_STRFUNC);
|
|
return FALSE;
|
|
}
|
|
|
|
wblock->rec->rec_type = REC_TYPE_FT_SPECIFIC_EVENT;
|
|
wblock->rec->rec_header.ft_specific_header.record_type = BLOCK_TYPE_SYSTEMD_JOURNAL;
|
|
wblock->rec->rec_header.ft_specific_header.record_len = entry_length;
|
|
wblock->rec->presence_flags = WTAP_HAS_TS|WTAP_HAS_CAP_LEN;
|
|
wblock->rec->tsprec = WTAP_TSPREC_USEC;
|
|
|
|
wblock->rec->ts.secs = (time_t) (rt_ts / 1000000);
|
|
wblock->rec->ts.nsecs = (rt_ts % 1000000) * 1000;
|
|
|
|
/*
|
|
* We return these to the caller in pcapng_read().
|
|
*/
|
|
wblock->internal = FALSE;
|
|
|
|
if (wth->file_encap == WTAP_ENCAP_UNKNOWN) {
|
|
/*
|
|
* Nothing (most notably an IDB) has set a file encap at this point.
|
|
* Do so here.
|
|
* XXX Should we set WTAP_ENCAP_SYSTEMD_JOURNAL if appropriate?
|
|
*/
|
|
wth->file_encap = WTAP_ENCAP_PER_PACKET;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_read_unknown_block(FILE_T fh, pcapng_block_header_t *bh,
|
|
#
|
|
#ifdef HAVE_PLUGINS
|
|
const section_info_t *section_info,
|
|
#else
|
|
const section_info_t *section_info _U_,
|
|
#endif
|
|
wtapng_block_t *wblock,
|
|
int *err, gchar **err_info)
|
|
{
|
|
guint32 block_read;
|
|
guint32 block_total_length;
|
|
#ifdef HAVE_PLUGINS
|
|
block_handler *handler;
|
|
#endif
|
|
|
|
if (bh->block_total_length < MIN_BLOCK_SIZE) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_unknown_block: total block length %u of an unknown block type is less than the minimum block size %u",
|
|
bh->block_total_length, MIN_BLOCK_SIZE);
|
|
return FALSE;
|
|
}
|
|
|
|
/* add padding bytes to "block total length" */
|
|
/* (the "block total length" of some example files don't contain any padding bytes!) */
|
|
if (bh->block_total_length % 4) {
|
|
block_total_length = bh->block_total_length + 4 - (bh->block_total_length % 4);
|
|
} else {
|
|
block_total_length = bh->block_total_length;
|
|
}
|
|
|
|
block_read = block_total_length - MIN_BLOCK_SIZE;
|
|
|
|
#ifdef HAVE_PLUGINS
|
|
/*
|
|
* Do we have a handler for this block type?
|
|
*/
|
|
if (block_handlers != NULL &&
|
|
(handler = (block_handler *)g_hash_table_lookup(block_handlers,
|
|
GUINT_TO_POINTER(bh->block_type))) != NULL) {
|
|
/* Yes - call it to read this block type. */
|
|
if (!handler->reader(fh, block_read, section_info->byte_swapped, wblock,
|
|
err, err_info))
|
|
return FALSE;
|
|
} else
|
|
#endif
|
|
{
|
|
/* No. Skip over this unknown block. */
|
|
if (!wtap_read_bytes(fh, NULL, block_read, err, err_info)) {
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* We're skipping this, so we won't return these to the caller
|
|
* in pcapng_read().
|
|
*/
|
|
wblock->internal = TRUE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
static block_return_val
|
|
pcapng_read_block(wtap *wth, FILE_T fh, pcapng_t *pn,
|
|
section_info_t *section_info,
|
|
section_info_t *new_section_info,
|
|
wtapng_block_t *wblock,
|
|
int *err, gchar **err_info)
|
|
{
|
|
block_return_val ret;
|
|
pcapng_block_header_t bh;
|
|
guint32 block_total_length;
|
|
|
|
wblock->block = NULL;
|
|
|
|
/* Try to read the (next) block header */
|
|
if (!wtap_read_bytes_or_eof(fh, &bh, sizeof bh, err, err_info)) {
|
|
pcapng_debug("pcapng_read_block: wtap_read_bytes_or_eof() failed, err = %d.", *err);
|
|
if (*err == 0 || *err == WTAP_ERR_SHORT_READ) {
|
|
/*
|
|
* Short read or EOF.
|
|
*
|
|
* If we're reading this as part of an open,
|
|
* the file is too short to be a pcapng file.
|
|
*
|
|
* If we're not, we treat PCAPNG_BLOCK_NOT_SHB and
|
|
* PCAPNG_BLOCK_ERROR the same, so we can just return
|
|
* PCAPNG_BLOCK_NOT_SHB in both cases.
|
|
*/
|
|
return PCAPNG_BLOCK_NOT_SHB;
|
|
}
|
|
return PCAPNG_BLOCK_ERROR;
|
|
}
|
|
|
|
/*
|
|
* SHBs have to be treated differently from other blocks, because
|
|
* the byte order of the fields in the block can only be determined
|
|
* by looking at the byte-order magic number inside the block, not
|
|
* by using the byte order of the section to which it belongs, as
|
|
* it is the block that *defines* the byte order of the section to
|
|
* which it belongs.
|
|
*/
|
|
if (bh.block_type == BLOCK_TYPE_SHB) {
|
|
/*
|
|
* BLOCK_TYPE_SHB has the same value regardless of byte order,
|
|
* so we don't need to byte-swap it.
|
|
*
|
|
* We *might* need to byte-swap the total length, but we
|
|
* can't determine whether we do until we look inside the
|
|
* block and find the byte-order magic number, so we rely
|
|
* on pcapng_read_section_header_block() to do that and
|
|
* to swap the total length (as it needs to get the total
|
|
* length in the right byte order in order to read the
|
|
* entire block).
|
|
*/
|
|
wblock->type = bh.block_type;
|
|
|
|
pcapng_debug("pcapng_read_block: block_type 0x%x", bh.block_type);
|
|
|
|
/*
|
|
* Fill in the section_info_t passed to us for use when
|
|
* there's a new SHB; don't overwrite the existing SHB,
|
|
* if there is one.
|
|
*/
|
|
ret = pcapng_read_section_header_block(fh, &bh, new_section_info,
|
|
wblock, err, err_info);
|
|
if (ret != PCAPNG_BLOCK_OK) {
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* This is the current section; use its byte order, not that
|
|
* of the section pointed to by section_info (which could be
|
|
* null).
|
|
*/
|
|
section_info = new_section_info;
|
|
} else {
|
|
/*
|
|
* Not an SHB.
|
|
*
|
|
* If section_info is null, it means we're calling this from
|
|
* pcapng_open() to see whether the file begins with an SHB.
|
|
* It doesn't, which means that it is not a pcapng file.
|
|
*/
|
|
if (section_info == NULL) {
|
|
*err = 0;
|
|
*err_info = NULL;
|
|
return PCAPNG_BLOCK_NOT_SHB;
|
|
}
|
|
|
|
if (section_info->byte_swapped) {
|
|
bh.block_type = GUINT32_SWAP_LE_BE(bh.block_type);
|
|
bh.block_total_length = GUINT32_SWAP_LE_BE(bh.block_total_length);
|
|
}
|
|
|
|
wblock->type = bh.block_type;
|
|
|
|
pcapng_debug("pcapng_read_block: block_type 0x%x", bh.block_type);
|
|
|
|
/* Don't try to allocate memory for a huge number of options, as
|
|
that might fail and, even if it succeeds, it might not leave
|
|
any address space or memory+backing store for anything else.
|
|
|
|
We do that by imposing a maximum block size of MAX_BLOCK_SIZE. */
|
|
if (bh.block_total_length > MAX_BLOCK_SIZE) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_read_block: total block length %u is too large (> %u)",
|
|
bh.block_total_length, MAX_BLOCK_SIZE);
|
|
return PCAPNG_BLOCK_ERROR;
|
|
}
|
|
|
|
switch (bh.block_type) {
|
|
case(BLOCK_TYPE_IDB):
|
|
if (!pcapng_read_if_descr_block(wth, fh, &bh, section_info, wblock, err, err_info))
|
|
return PCAPNG_BLOCK_ERROR;
|
|
break;
|
|
case(BLOCK_TYPE_PB):
|
|
if (!pcapng_read_packet_block(fh, &bh, section_info, wblock, err, err_info, FALSE))
|
|
return PCAPNG_BLOCK_ERROR;
|
|
break;
|
|
case(BLOCK_TYPE_SPB):
|
|
if (!pcapng_read_simple_packet_block(fh, &bh, section_info, wblock, err, err_info))
|
|
return PCAPNG_BLOCK_ERROR;
|
|
break;
|
|
case(BLOCK_TYPE_EPB):
|
|
if (!pcapng_read_packet_block(fh, &bh, section_info, wblock, err, err_info, TRUE))
|
|
return PCAPNG_BLOCK_ERROR;
|
|
break;
|
|
case(BLOCK_TYPE_NRB):
|
|
if (!pcapng_read_name_resolution_block(fh, &bh, pn, section_info, wblock, err, err_info))
|
|
return PCAPNG_BLOCK_ERROR;
|
|
break;
|
|
case(BLOCK_TYPE_ISB):
|
|
if (!pcapng_read_interface_statistics_block(fh, &bh, section_info, wblock, err, err_info))
|
|
return PCAPNG_BLOCK_ERROR;
|
|
break;
|
|
case(BLOCK_TYPE_DSB):
|
|
if (!pcapng_read_decryption_secrets_block(fh, &bh, section_info, wblock, err, err_info))
|
|
return PCAPNG_BLOCK_ERROR;
|
|
break;
|
|
case(BLOCK_TYPE_SYSDIG_EVENT):
|
|
/* case(BLOCK_TYPE_SYSDIG_EVF): */
|
|
if (!pcapng_read_sysdig_event_block(fh, &bh, section_info, wblock, err, err_info))
|
|
return PCAPNG_BLOCK_ERROR;
|
|
break;
|
|
case(BLOCK_TYPE_SYSTEMD_JOURNAL):
|
|
if (!pcapng_read_systemd_journal_export_block(wth, fh, &bh, pn, wblock, err, err_info))
|
|
return PCAPNG_BLOCK_ERROR;
|
|
break;
|
|
default:
|
|
pcapng_debug("pcapng_read_block: Unknown block_type: 0x%x (block ignored), block total length %d", bh.block_type, bh.block_total_length);
|
|
if (!pcapng_read_unknown_block(fh, &bh, section_info, wblock, err, err_info))
|
|
return PCAPNG_BLOCK_ERROR;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* sanity check: first and second block lengths must match */
|
|
if (!wtap_read_bytes(fh, &block_total_length, sizeof block_total_length,
|
|
err, err_info)) {
|
|
pcapng_debug("pcapng_check_block_trailer: couldn't read second block length");
|
|
return PCAPNG_BLOCK_ERROR;
|
|
}
|
|
|
|
if (section_info->byte_swapped)
|
|
block_total_length = GUINT32_SWAP_LE_BE(block_total_length);
|
|
|
|
if (block_total_length != bh.block_total_length) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("pcapng_check_block_trailer: total block lengths (first %u and second %u) don't match",
|
|
bh.block_total_length, block_total_length);
|
|
return PCAPNG_BLOCK_ERROR;
|
|
}
|
|
return PCAPNG_BLOCK_OK;
|
|
}
|
|
|
|
/* Process an IDB that we've just read. The contents of wblock are copied as needed. */
|
|
static void
|
|
pcapng_process_idb(wtap *wth, section_info_t *section_info,
|
|
wtapng_block_t *wblock)
|
|
{
|
|
wtap_block_t int_data = wtap_block_create(WTAP_BLOCK_IF_DESCR);
|
|
interface_info_t iface_info;
|
|
wtapng_if_descr_mandatory_t *if_descr_mand = (wtapng_if_descr_mandatory_t*)wtap_block_get_mandatory_data(int_data),
|
|
*wblock_if_descr_mand = (wtapng_if_descr_mandatory_t*)wtap_block_get_mandatory_data(wblock->block);
|
|
guint8 if_fcslen;
|
|
|
|
wtap_block_copy(int_data, wblock->block);
|
|
|
|
/* XXX if_tsoffset; opt 14 A 64 bits integer value that specifies an offset (in seconds)...*/
|
|
/* Interface statistics */
|
|
if_descr_mand->num_stat_entries = 0;
|
|
if_descr_mand->interface_statistics = NULL;
|
|
|
|
wtap_add_idb(wth, int_data);
|
|
|
|
iface_info.wtap_encap = wblock_if_descr_mand->wtap_encap;
|
|
iface_info.snap_len = wblock_if_descr_mand->snap_len;
|
|
iface_info.time_units_per_second = wblock_if_descr_mand->time_units_per_second;
|
|
iface_info.tsprecision = wblock_if_descr_mand->tsprecision;
|
|
|
|
if (wtap_block_get_uint8_option_value(wblock->block, OPT_IDB_FCSLEN,
|
|
&if_fcslen) == WTAP_OPTTYPE_SUCCESS)
|
|
iface_info.fcslen = if_fcslen;
|
|
else
|
|
iface_info.fcslen = -1;
|
|
|
|
g_array_append_val(section_info->interfaces, iface_info);
|
|
}
|
|
|
|
/* Process a DSB that we have just read. */
|
|
static void
|
|
pcapng_process_dsb(wtap *wth, wtapng_block_t *wblock)
|
|
{
|
|
wtapng_process_dsb(wth, wblock->block);
|
|
|
|
/* Store DSB such that it can be saved by the dumper. */
|
|
g_array_append_val(wth->dsbs, wblock->block);
|
|
}
|
|
|
|
/* classic wtap: open capture file */
|
|
wtap_open_return_val
|
|
pcapng_open(wtap *wth, int *err, gchar **err_info)
|
|
{
|
|
pcapng_t pn;
|
|
wtapng_block_t wblock;
|
|
pcapng_t *pcapng;
|
|
pcapng_block_header_t bh;
|
|
gint64 saved_offset;
|
|
section_info_t first_section, new_section, *current_section;
|
|
|
|
/* we don't know the byte swapping of the file yet */
|
|
first_section.byte_swapped = FALSE;
|
|
first_section.version_major = -1;
|
|
first_section.version_minor = -1;
|
|
first_section.shb_off = 0; /* it's at the very beginning of the file */
|
|
|
|
/* we don't expect any packet blocks yet */
|
|
wblock.frame_buffer = NULL;
|
|
wblock.rec = NULL;
|
|
|
|
pcapng_debug("pcapng_open: opening file");
|
|
/*
|
|
* Read first block.
|
|
*
|
|
* There is no current section_info yet, so don't pass any.
|
|
* Pass a pointer to first_section to fill in.
|
|
*/
|
|
switch (pcapng_read_block(wth, wth->fh, &pn, NULL, &first_section, &wblock,
|
|
err, err_info)) {
|
|
|
|
case PCAPNG_BLOCK_OK:
|
|
/* No problem */
|
|
break;
|
|
|
|
case PCAPNG_BLOCK_NOT_SHB:
|
|
/* This doesn't look like an SHB, so this isn't a pcapng file. */
|
|
wtap_block_free(wblock.block);
|
|
*err = 0;
|
|
g_free(*err_info);
|
|
*err_info = NULL;
|
|
return WTAP_OPEN_NOT_MINE;
|
|
|
|
case PCAPNG_BLOCK_ERROR:
|
|
/* An I/O error, or this probably *is* a pcapng file but not a valid one. */
|
|
wtap_block_free(wblock.block);
|
|
return WTAP_OPEN_ERROR;
|
|
}
|
|
|
|
/* first block must be a "Section Header Block" */
|
|
if (wblock.type != BLOCK_TYPE_SHB) {
|
|
/*
|
|
* XXX - check for damage from transferring a file
|
|
* between Windows and UN*X as text rather than
|
|
* binary data?
|
|
*/
|
|
pcapng_debug("pcapng_open: first block type %u not SHB", wblock.type);
|
|
wtap_block_free(wblock.block);
|
|
return WTAP_OPEN_NOT_MINE;
|
|
}
|
|
|
|
/*
|
|
* At this point, we've decided this is a pcapng file, not
|
|
* some other type of file, so we can't return WTAP_OPEN_NOT_MINE
|
|
* past this point.
|
|
*/
|
|
wtap_block_copy(g_array_index(wth->shb_hdrs, wtap_block_t, 0), wblock.block);
|
|
wtap_block_free(wblock.block);
|
|
wblock.block = NULL;
|
|
|
|
wth->file_encap = WTAP_ENCAP_UNKNOWN;
|
|
wth->snapshot_length = 0;
|
|
wth->file_tsprec = WTAP_TSPREC_UNKNOWN;
|
|
pcapng = (pcapng_t *)g_malloc(sizeof(pcapng_t));
|
|
wth->priv = (void *)pcapng;
|
|
*pcapng = pn;
|
|
/*
|
|
* We're currently processing the first section; as this is written
|
|
* in C, that's section 0. :-)
|
|
*/
|
|
pcapng->current_section_number = 0;
|
|
|
|
/*
|
|
* Create the array of interfaces for the first section.
|
|
*/
|
|
first_section.interfaces = g_array_new(FALSE, FALSE, sizeof(interface_info_t));
|
|
|
|
/*
|
|
* Allocate the sections table with space reserved for the first
|
|
* section, and add that section.
|
|
*/
|
|
pcapng->sections = g_array_sized_new(FALSE, FALSE, sizeof(section_info_t), 1);
|
|
g_array_append_val(pcapng->sections, first_section);
|
|
|
|
wth->subtype_read = pcapng_read;
|
|
wth->subtype_seek_read = pcapng_seek_read;
|
|
wth->subtype_close = pcapng_close;
|
|
wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PCAPNG;
|
|
|
|
/* Always initialize the list of Decryption Secret Blocks such that a
|
|
* wtap_dumper can refer to it right after opening the capture file. */
|
|
wth->dsbs = g_array_new(FALSE, FALSE, sizeof(wtap_block_t));
|
|
|
|
/* Loop over all IDB:s that appear before any packets */
|
|
while (1) {
|
|
/* peek at next block */
|
|
/* Try to read the (next) block header */
|
|
saved_offset = file_tell(wth->fh);
|
|
if (!wtap_read_bytes_or_eof(wth->fh, &bh, sizeof bh, err, err_info)) {
|
|
if (*err == 0) {
|
|
/* EOF */
|
|
pcapng_debug("No more IDBs available...");
|
|
break;
|
|
}
|
|
pcapng_debug("pcapng_open: Check for more IDB:s, wtap_read_bytes_or_eof() failed, err = %d.", *err);
|
|
return WTAP_OPEN_ERROR;
|
|
}
|
|
|
|
/* go back to where we were */
|
|
file_seek(wth->fh, saved_offset, SEEK_SET, err);
|
|
|
|
/*
|
|
* Get a pointer to the current section's section_info_t.
|
|
*/
|
|
current_section = &g_array_index(pcapng->sections, section_info_t,
|
|
pcapng->current_section_number);
|
|
|
|
if (current_section->byte_swapped) {
|
|
bh.block_type = GUINT32_SWAP_LE_BE(bh.block_type);
|
|
}
|
|
|
|
pcapng_debug("pcapng_open: Check for more IDB:s block_type 0x%x", bh.block_type);
|
|
|
|
if (bh.block_type != BLOCK_TYPE_IDB) {
|
|
break; /* No more IDB:s */
|
|
}
|
|
|
|
if (pcapng_read_block(wth, wth->fh, pcapng, current_section,
|
|
&new_section, &wblock,
|
|
err, err_info) != PCAPNG_BLOCK_OK) {
|
|
wtap_block_free(wblock.block);
|
|
if (*err == 0) {
|
|
pcapng_debug("No more IDBs available...");
|
|
break;
|
|
} else {
|
|
pcapng_debug("pcapng_open: couldn't read IDB");
|
|
return WTAP_OPEN_ERROR;
|
|
}
|
|
}
|
|
pcapng_process_idb(wth, current_section, &wblock);
|
|
wtap_block_free(wblock.block);
|
|
pcapng_debug("pcapng_open: Read IDB number_of_interfaces %u, wtap_encap %i",
|
|
wth->interface_data->len, wth->file_encap);
|
|
}
|
|
return WTAP_OPEN_MINE;
|
|
}
|
|
|
|
|
|
/* classic wtap: read packet */
|
|
static gboolean
|
|
pcapng_read(wtap *wth, wtap_rec *rec, Buffer *buf, int *err,
|
|
gchar **err_info, gint64 *data_offset)
|
|
{
|
|
pcapng_t *pcapng = (pcapng_t *)wth->priv;
|
|
section_info_t *current_section, new_section;
|
|
wtapng_block_t wblock;
|
|
wtap_block_t wtapng_if_descr;
|
|
wtap_block_t if_stats;
|
|
wtapng_if_stats_mandatory_t *if_stats_mand_block, *if_stats_mand;
|
|
wtapng_if_descr_mandatory_t *wtapng_if_descr_mand;
|
|
|
|
wblock.frame_buffer = buf;
|
|
wblock.rec = rec;
|
|
|
|
pcapng->add_new_ipv4 = wth->add_new_ipv4;
|
|
pcapng->add_new_ipv6 = wth->add_new_ipv6;
|
|
|
|
/* read next block */
|
|
while (1) {
|
|
*data_offset = file_tell(wth->fh);
|
|
pcapng_debug("pcapng_read: data_offset is %" G_GINT64_MODIFIER "d", *data_offset);
|
|
|
|
/*
|
|
* Get the section_info_t for the current section.
|
|
*/
|
|
current_section = &g_array_index(pcapng->sections, section_info_t,
|
|
pcapng->current_section_number);
|
|
|
|
/*
|
|
* Read the next block.
|
|
*/
|
|
if (pcapng_read_block(wth, wth->fh, pcapng, current_section,
|
|
&new_section, &wblock,
|
|
err, err_info) != PCAPNG_BLOCK_OK) {
|
|
pcapng_debug("pcapng_read: data_offset is finally %" G_GINT64_MODIFIER "d", *data_offset);
|
|
pcapng_debug("pcapng_read: couldn't read packet block");
|
|
wtap_block_free(wblock.block);
|
|
return FALSE;
|
|
}
|
|
|
|
if (!wblock.internal) {
|
|
/*
|
|
* This is a block type we return to the caller to process.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* This is a block type we process internally, rather than
|
|
* returning it for the caller to process.
|
|
*/
|
|
switch (wblock.type) {
|
|
|
|
case(BLOCK_TYPE_SHB):
|
|
pcapng_debug("pcapng_read: another section header block");
|
|
g_array_append_val(wth->shb_hdrs, wblock.block);
|
|
|
|
/*
|
|
* Update the current section number, and add
|
|
* the updated section_info_t to the array of
|
|
* section_info_t's for this file.
|
|
*/
|
|
pcapng->current_section_number++;
|
|
new_section.interfaces = g_array_new(FALSE, FALSE, sizeof(interface_info_t));
|
|
new_section.shb_off = *data_offset;
|
|
g_array_append_val(pcapng->sections, new_section);
|
|
break;
|
|
|
|
case(BLOCK_TYPE_IDB):
|
|
/* A new interface */
|
|
pcapng_debug("pcapng_read: block type BLOCK_TYPE_IDB");
|
|
pcapng_process_idb(wth, current_section, &wblock);
|
|
wtap_block_free(wblock.block);
|
|
break;
|
|
|
|
case(BLOCK_TYPE_DSB):
|
|
/* Decryption secrets. */
|
|
pcapng_debug("pcapng_read: block type BLOCK_TYPE_DSB");
|
|
pcapng_process_dsb(wth, &wblock);
|
|
/* Do not free wblock.block, it is consumed by pcapng_process_dsb */
|
|
break;
|
|
|
|
case(BLOCK_TYPE_NRB):
|
|
/* More name resolution entries */
|
|
pcapng_debug("pcapng_read: block type BLOCK_TYPE_NRB");
|
|
if (wth->nrb_hdrs == NULL) {
|
|
wth->nrb_hdrs = g_array_new(FALSE, FALSE, sizeof(wtap_block_t));
|
|
}
|
|
g_array_append_val(wth->nrb_hdrs, wblock.block);
|
|
break;
|
|
|
|
case(BLOCK_TYPE_ISB):
|
|
/*
|
|
* Another interface statistics report
|
|
*
|
|
* XXX - given that they're reports, we should be
|
|
* supplying them in read calls, and displaying them
|
|
* in the "packet" list, so you can see what the
|
|
* statistics were *at the time when the report was
|
|
* made*.
|
|
*
|
|
* The statistics from the *last* ISB could be displayed
|
|
* in the summary, but if there are packets after the
|
|
* last ISB, that could be misleading.
|
|
*
|
|
* If we only display them if that ISB has an isb_endtime
|
|
* option, which *should* only appear when capturing ended
|
|
* on that interface (so there should be no more packet
|
|
* blocks or ISBs for that interface after that point,
|
|
* that would be the best way of showing "summary"
|
|
* statistics.
|
|
*/
|
|
pcapng_debug("pcapng_read: block type BLOCK_TYPE_ISB");
|
|
if_stats_mand_block = (wtapng_if_stats_mandatory_t*)wtap_block_get_mandatory_data(wblock.block);
|
|
if (wth->interface_data->len <= if_stats_mand_block->interface_id) {
|
|
pcapng_debug("pcapng_read: BLOCK_TYPE_ISB wblock.if_stats.interface_id %u >= number_of_interfaces", if_stats_mand_block->interface_id);
|
|
} else {
|
|
/* Get the interface description */
|
|
wtapng_if_descr = g_array_index(wth->interface_data, wtap_block_t, if_stats_mand_block->interface_id);
|
|
wtapng_if_descr_mand = (wtapng_if_descr_mandatory_t*)wtap_block_get_mandatory_data(wtapng_if_descr);
|
|
if (wtapng_if_descr_mand->num_stat_entries == 0) {
|
|
/* First ISB found, no previous entry */
|
|
pcapng_debug("pcapng_read: block type BLOCK_TYPE_ISB. First ISB found, no previous entry");
|
|
wtapng_if_descr_mand->interface_statistics = g_array_new(FALSE, FALSE, sizeof(wtap_block_t));
|
|
}
|
|
|
|
if_stats = wtap_block_create(WTAP_BLOCK_IF_STATS);
|
|
if_stats_mand = (wtapng_if_stats_mandatory_t*)wtap_block_get_mandatory_data(if_stats);
|
|
if_stats_mand->interface_id = if_stats_mand_block->interface_id;
|
|
if_stats_mand->ts_high = if_stats_mand_block->ts_high;
|
|
if_stats_mand->ts_low = if_stats_mand_block->ts_low;
|
|
|
|
wtap_block_copy(if_stats, wblock.block);
|
|
g_array_append_val(wtapng_if_descr_mand->interface_statistics, if_stats);
|
|
wtapng_if_descr_mand->num_stat_entries++;
|
|
}
|
|
wtap_block_free(wblock.block);
|
|
break;
|
|
|
|
default:
|
|
/* XXX - improve handling of "unknown" blocks */
|
|
pcapng_debug("pcapng_read: Unknown block type 0x%08x", wblock.type);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*pcapng_debug("Read length: %u Packet length: %u", bytes_read, rec->rec_header.packet_header.caplen);*/
|
|
pcapng_debug("pcapng_read: data_offset is finally %" G_GINT64_MODIFIER "d", *data_offset);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* classic wtap: seek to file position and read packet */
|
|
static gboolean
|
|
pcapng_seek_read(wtap *wth, gint64 seek_off,
|
|
wtap_rec *rec, Buffer *buf,
|
|
int *err, gchar **err_info)
|
|
{
|
|
pcapng_t *pcapng = (pcapng_t *)wth->priv;
|
|
section_info_t *section_info, new_section;
|
|
wtapng_block_t wblock;
|
|
|
|
|
|
/* seek to the right file position */
|
|
if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) < 0) {
|
|
return FALSE; /* Seek error */
|
|
}
|
|
pcapng_debug("pcapng_seek_read: reading at offset %" G_GINT64_MODIFIER "u", seek_off);
|
|
|
|
/*
|
|
* Find the section_info_t for the section in which this block
|
|
* appears.
|
|
*
|
|
* First, make sure we have at least one section; if we don't, that's
|
|
* an internal error.
|
|
*/
|
|
g_assert(pcapng->sections->len >= 1);
|
|
|
|
/*
|
|
* Now scan backwards through the array to find the first section
|
|
* that begins at or before the offset of the block we're reading.
|
|
*
|
|
* Yes, that's O(n) in the number of blocks, but we're unlikely to
|
|
* have many blocks and pretty unlikely to have more than one.
|
|
*/
|
|
guint section_number = pcapng->sections->len - 1;
|
|
for (;;) {
|
|
section_info = &g_array_index(pcapng->sections, section_info_t,
|
|
section_number);
|
|
if (section_info->shb_off <= seek_off)
|
|
break;
|
|
|
|
/*
|
|
* If that's section 0, something's wrong; that section should
|
|
* have an offset of 0.
|
|
*/
|
|
g_assert(section_number != 0);
|
|
section_number--;
|
|
}
|
|
|
|
wblock.frame_buffer = buf;
|
|
wblock.rec = rec;
|
|
|
|
/* read the block */
|
|
if (pcapng_read_block(wth, wth->random_fh, pcapng, section_info,
|
|
&new_section, &wblock,
|
|
err, err_info) != PCAPNG_BLOCK_OK) {
|
|
pcapng_debug("pcapng_seek_read: couldn't read packet block (err=%d).",
|
|
*err);
|
|
wtap_block_free(wblock.block);
|
|
return FALSE;
|
|
}
|
|
|
|
/* block must not be one we process internally rather than supplying */
|
|
if (wblock.internal) {
|
|
pcapng_debug("pcapng_seek_read: block type %u is not one we return",
|
|
wblock.type);
|
|
wtap_block_free(wblock.block);
|
|
return FALSE;
|
|
}
|
|
|
|
wtap_block_free(wblock.block);
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* classic wtap: close capture file */
|
|
static void
|
|
pcapng_close(wtap *wth)
|
|
{
|
|
pcapng_t *pcapng = (pcapng_t *)wth->priv;
|
|
|
|
pcapng_debug("pcapng_close: closing file");
|
|
|
|
/*
|
|
* Free up the interfaces tables for all the sections.
|
|
*/
|
|
for (guint i = 0; i < pcapng->sections->len; i++) {
|
|
section_info_t *section_info = &g_array_index(pcapng->sections,
|
|
section_info_t, i);
|
|
g_array_free(section_info->interfaces, TRUE);
|
|
}
|
|
g_array_free(pcapng->sections, TRUE);
|
|
}
|
|
|
|
typedef struct pcapng_block_size_t
|
|
{
|
|
guint32 size;
|
|
} pcapng_block_size_t;
|
|
|
|
static guint32 pcapng_compute_option_string_size(char *str)
|
|
{
|
|
guint32 size = 0, pad;
|
|
|
|
size = (guint32)strlen(str) & 0xffff;
|
|
if ((size % 4)) {
|
|
pad = 4 - (size % 4);
|
|
} else {
|
|
pad = 0;
|
|
}
|
|
|
|
size += pad;
|
|
|
|
return size;
|
|
}
|
|
|
|
static void compute_shb_option_size(wtap_block_t block _U_, guint option_id, wtap_opttype_e option_type _U_, wtap_optval_t* optval, void* user_data)
|
|
{
|
|
pcapng_block_size_t* block_size = (pcapng_block_size_t*)user_data;
|
|
guint32 size = 0;
|
|
|
|
switch(option_id)
|
|
{
|
|
case OPT_COMMENT:
|
|
case OPT_SHB_HARDWARE:
|
|
case OPT_SHB_OS:
|
|
case OPT_SHB_USERAPPL:
|
|
size = pcapng_compute_option_string_size(optval->stringval);
|
|
break;
|
|
default:
|
|
/* Unknown options - size by datatype? */
|
|
break;
|
|
}
|
|
|
|
block_size->size += size;
|
|
/* Add bytes for option header if option should be written */
|
|
if (size > 0) {
|
|
/* Add optional padding to 32 bits */
|
|
if ((block_size->size & 0x03) != 0)
|
|
{
|
|
block_size->size += 4 - (block_size->size & 0x03);
|
|
}
|
|
block_size->size += 4;
|
|
}
|
|
}
|
|
|
|
typedef struct pcapng_write_block_t
|
|
{
|
|
wtap_dumper *wdh;
|
|
int *err;
|
|
gboolean success;
|
|
}
|
|
pcapng_write_block_t;
|
|
|
|
static gboolean pcapng_write_option_string(wtap_dumper *wdh, guint option_id, char *str, int *err)
|
|
{
|
|
struct pcapng_option_header option_hdr;
|
|
guint32 size = (guint32)strlen(str) & 0xffff;
|
|
const guint32 zero_pad = 0;
|
|
guint32 pad;
|
|
|
|
if (size == 0)
|
|
return TRUE;
|
|
|
|
/* String options don't consider pad bytes part of the length */
|
|
option_hdr.type = (guint16)option_id;
|
|
option_hdr.value_length = (guint16)size;
|
|
if (!wtap_dump_file_write(wdh, &option_hdr, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
|
|
if (!wtap_dump_file_write(wdh, str, size, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += size;
|
|
|
|
if ((size % 4)) {
|
|
pad = 4 - (size % 4);
|
|
} else {
|
|
pad = 0;
|
|
}
|
|
|
|
/* write padding (if any) */
|
|
if (pad != 0) {
|
|
if (!wtap_dump_file_write(wdh, &zero_pad, pad, err))
|
|
return FALSE;
|
|
|
|
wdh->bytes_dumped += pad;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void write_wtap_shb_option(wtap_block_t block _U_, guint option_id, wtap_opttype_e option_type _U_, wtap_optval_t *optval, void* user_data)
|
|
{
|
|
pcapng_write_block_t* write_block = (pcapng_write_block_t*)user_data;
|
|
|
|
/* Don't continue if there has been an error */
|
|
if (!write_block->success)
|
|
return;
|
|
|
|
switch(option_id)
|
|
{
|
|
case OPT_COMMENT:
|
|
case OPT_SHB_HARDWARE:
|
|
case OPT_SHB_OS:
|
|
case OPT_SHB_USERAPPL:
|
|
if (!pcapng_write_option_string(write_block->wdh, option_id, optval->stringval, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
break;
|
|
default:
|
|
/* Unknown options - write by datatype? */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Write a section header block.
|
|
* If we don't have a section block header already, create a default
|
|
* one with no options.
|
|
*/
|
|
static gboolean
|
|
pcapng_write_section_header_block(wtap_dumper *wdh, int *err)
|
|
{
|
|
pcapng_block_header_t bh;
|
|
pcapng_section_header_block_t shb;
|
|
pcapng_block_size_t block_size;
|
|
struct pcapng_option_header option_hdr;
|
|
wtap_block_t wdh_shb = NULL;
|
|
|
|
if (wdh->shb_hdrs && (wdh->shb_hdrs->len > 0)) {
|
|
wdh_shb = g_array_index(wdh->shb_hdrs, wtap_block_t, 0);
|
|
}
|
|
|
|
block_size.size = 0;
|
|
bh.block_total_length = (guint32)(sizeof(bh) + sizeof(shb) + 4);
|
|
if (wdh_shb) {
|
|
pcapng_debug("pcapng_write_section_header_block: Have shb_hdr");
|
|
|
|
/* Compute block size */
|
|
wtap_block_foreach_option(wdh_shb, compute_shb_option_size, &block_size);
|
|
|
|
if (block_size.size > 0) {
|
|
/* End-of-options tag */
|
|
block_size.size += 4;
|
|
}
|
|
|
|
bh.block_total_length += block_size.size;
|
|
}
|
|
|
|
pcapng_debug("pcapng_write_section_header_block: Total len %u", bh.block_total_length);
|
|
|
|
/* write block header */
|
|
bh.block_type = BLOCK_TYPE_SHB;
|
|
|
|
if (!wtap_dump_file_write(wdh, &bh, sizeof bh, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof bh;
|
|
|
|
/* write block fixed content */
|
|
shb.magic = 0x1A2B3C4D;
|
|
shb.version_major = 1;
|
|
shb.version_minor = 0;
|
|
if (wdh_shb) {
|
|
wtapng_mandatory_section_t* section_data = (wtapng_mandatory_section_t*)wtap_block_get_mandatory_data(wdh_shb);
|
|
shb.section_length = section_data->section_length;
|
|
} else {
|
|
shb.section_length = -1;
|
|
}
|
|
|
|
if (!wtap_dump_file_write(wdh, &shb, sizeof shb, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof shb;
|
|
|
|
if (wdh_shb) {
|
|
pcapng_write_block_t block_data;
|
|
|
|
if (block_size.size > 0) {
|
|
/* Write options */
|
|
block_data.wdh = wdh;
|
|
block_data.err = err;
|
|
block_data.success = TRUE;
|
|
wtap_block_foreach_option(wdh_shb, write_wtap_shb_option, &block_data);
|
|
|
|
if (!block_data.success)
|
|
return FALSE;
|
|
|
|
/* Write end of options */
|
|
option_hdr.type = OPT_EOFOPT;
|
|
option_hdr.value_length = 0;
|
|
if (!wtap_dump_file_write(wdh, &option_hdr, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
}
|
|
}
|
|
|
|
/* write block footer */
|
|
if (!wtap_dump_file_write(wdh, &bh.block_total_length,
|
|
sizeof bh.block_total_length, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof bh.block_total_length;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_write_enhanced_packet_block(wtap_dumper *wdh, const wtap_rec *rec,
|
|
const guint8 *pd, int *err)
|
|
{
|
|
const union wtap_pseudo_header *pseudo_header = &rec->rec_header.packet_header.pseudo_header;
|
|
pcapng_block_header_t bh;
|
|
pcapng_enhanced_packet_block_t epb;
|
|
guint64 ts;
|
|
const guint32 zero_pad = 0;
|
|
guint32 pad_len;
|
|
guint32 phdr_len;
|
|
gboolean have_options = FALSE;
|
|
guint32 options_total_length = 0;
|
|
struct option option_hdr;
|
|
guint32 comment_len = 0, comment_pad_len = 0;
|
|
wtap_block_t int_data;
|
|
wtapng_if_descr_mandatory_t *int_data_mand;
|
|
|
|
/* Don't write anything we're not willing to read. */
|
|
if (rec->rec_header.packet_header.caplen > wtap_max_snaplen_for_encap(wdh->encap)) {
|
|
*err = WTAP_ERR_PACKET_TOO_LARGE;
|
|
return FALSE;
|
|
}
|
|
|
|
phdr_len = (guint32)pcap_get_phdr_size(rec->rec_header.packet_header.pkt_encap, pseudo_header);
|
|
if ((phdr_len + rec->rec_header.packet_header.caplen) % 4) {
|
|
pad_len = 4 - ((phdr_len + rec->rec_header.packet_header.caplen) % 4);
|
|
} else {
|
|
pad_len = 0;
|
|
}
|
|
|
|
/* Check if we should write comment option */
|
|
if (rec->opt_comment) {
|
|
have_options = TRUE;
|
|
comment_len = (guint32)strlen(rec->opt_comment) & 0xffff;
|
|
if ((comment_len % 4)) {
|
|
comment_pad_len = 4 - (comment_len % 4);
|
|
} else {
|
|
comment_pad_len = 0;
|
|
}
|
|
options_total_length = options_total_length + comment_len + comment_pad_len + 4 /* comment options tag */ ;
|
|
}
|
|
if (rec->presence_flags & WTAP_HAS_PACK_FLAGS) {
|
|
have_options = TRUE;
|
|
options_total_length = options_total_length + 8;
|
|
}
|
|
if (rec->presence_flags & WTAP_HAS_DROP_COUNT) {
|
|
have_options = TRUE;
|
|
options_total_length = options_total_length + 12;
|
|
}
|
|
if (rec->presence_flags & WTAP_HAS_PACKET_ID) {
|
|
have_options = TRUE;
|
|
options_total_length = options_total_length + 12;
|
|
}
|
|
if (rec->presence_flags & WTAP_HAS_INT_QUEUE) {
|
|
have_options = TRUE;
|
|
options_total_length = options_total_length + 8;
|
|
}
|
|
if (rec->presence_flags & WTAP_HAS_VERDICT && rec->packet_verdict != NULL) {
|
|
|
|
for(guint i = 0; i < rec->packet_verdict->len; i++) {
|
|
gsize len;
|
|
GBytes *verdict = (GBytes *) g_ptr_array_index(rec->packet_verdict, i);
|
|
|
|
if (g_bytes_get_data(verdict, &len) && len != 0)
|
|
options_total_length += ROUND_TO_4BYTE(4 + len);
|
|
}
|
|
have_options = TRUE;
|
|
}
|
|
if (have_options) {
|
|
/* End-of options tag */
|
|
options_total_length += 4;
|
|
}
|
|
|
|
/* write (enhanced) packet block header */
|
|
bh.block_type = BLOCK_TYPE_EPB;
|
|
bh.block_total_length = (guint32)sizeof(bh) + (guint32)sizeof(epb) + phdr_len + rec->rec_header.packet_header.caplen + pad_len + options_total_length + 4;
|
|
|
|
if (!wtap_dump_file_write(wdh, &bh, sizeof bh, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof bh;
|
|
|
|
/* write block fixed content */
|
|
if (rec->presence_flags & WTAP_HAS_INTERFACE_ID)
|
|
epb.interface_id = rec->rec_header.packet_header.interface_id;
|
|
else {
|
|
/*
|
|
* XXX - we should support writing WTAP_ENCAP_PER_PACKET
|
|
* data to pcapng files even if we *don't* have interface
|
|
* IDs.
|
|
*/
|
|
epb.interface_id = 0;
|
|
}
|
|
/*
|
|
* Split the 64-bit timestamp into two 32-bit pieces, using
|
|
* the time stamp resolution for the interface.
|
|
*/
|
|
if (epb.interface_id >= wdh->interface_data->len) {
|
|
/*
|
|
* Our caller is doing something bad.
|
|
*/
|
|
*err = WTAP_ERR_INTERNAL;
|
|
return FALSE;
|
|
}
|
|
int_data = g_array_index(wdh->interface_data, wtap_block_t,
|
|
epb.interface_id);
|
|
int_data_mand = (wtapng_if_descr_mandatory_t*)wtap_block_get_mandatory_data(int_data);
|
|
ts = ((guint64)rec->ts.secs) * int_data_mand->time_units_per_second +
|
|
(((guint64)rec->ts.nsecs) * int_data_mand->time_units_per_second) / 1000000000;
|
|
epb.timestamp_high = (guint32)(ts >> 32);
|
|
epb.timestamp_low = (guint32)ts;
|
|
epb.captured_len = rec->rec_header.packet_header.caplen + phdr_len;
|
|
epb.packet_len = rec->rec_header.packet_header.len + phdr_len;
|
|
|
|
if (!wtap_dump_file_write(wdh, &epb, sizeof epb, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof epb;
|
|
|
|
/* write pseudo header */
|
|
if (!pcap_write_phdr(wdh, rec->rec_header.packet_header.pkt_encap, pseudo_header, err)) {
|
|
return FALSE;
|
|
}
|
|
wdh->bytes_dumped += phdr_len;
|
|
|
|
/* write packet data */
|
|
if (!wtap_dump_file_write(wdh, pd, rec->rec_header.packet_header.caplen, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += rec->rec_header.packet_header.caplen;
|
|
|
|
/* write padding (if any) */
|
|
if (pad_len != 0) {
|
|
if (!wtap_dump_file_write(wdh, &zero_pad, pad_len, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += pad_len;
|
|
}
|
|
|
|
/* XXX - write (optional) block options */
|
|
/* options defined in Section 2.5 (Options)
|
|
* Name Code Length Description
|
|
* opt_comment 1 variable A UTF-8 string containing a comment that is associated to the current block.
|
|
*
|
|
* Enhanced Packet Block options
|
|
* epb_flags 2 4 A flags word containing link-layer information. A complete specification of
|
|
* the allowed flags can be found in Appendix A (Packet Block Flags Word).
|
|
* epb_hash 3 variable This option contains a hash of the packet. The first byte specifies the hashing algorithm,
|
|
* while the following bytes contain the actual hash, whose size depends on the hashing algorithm,
|
|
* and hence from the value in the first bit. The hashing algorithm can be: 2s complement
|
|
* (algorithm byte = 0, size=XXX), XOR (algorithm byte = 1, size=XXX), CRC32 (algorithm byte = 2, size = 4),
|
|
* MD-5 (algorithm byte = 3, size=XXX), SHA-1 (algorithm byte = 4, size=XXX).
|
|
* The hash covers only the packet, not the header added by the capture driver:
|
|
* this gives the possibility to calculate it inside the network card.
|
|
* The hash allows easier comparison/merging of different capture files, and reliable data transfer between the
|
|
* data acquisition system and the capture library.
|
|
* epb_dropcount 4 8 A 64bit integer value specifying the number of packets lost (by the interface and the operating system)
|
|
* between this packet and the preceding one.
|
|
* epb_packetid 5 8 The epb_packetid option is a 64-bit unsigned integer that
|
|
* uniquely identifies the packet. If the same packet is seen
|
|
* by multiple interfaces and there is a way for the capture
|
|
* application to correlate them, the same epb_packetid value
|
|
* must be used. An example could be a router that captures
|
|
* packets on all its interfaces in both directions. When a
|
|
* packet hits interface A on ingress, an EPB entry gets
|
|
* created, TTL gets decremented, and right before it egresses
|
|
* on interface B another EPB entry gets created in the trace
|
|
* file. In this case, two packets are in the capture file,
|
|
* which are not identical but the epb_packetid can be used to
|
|
* correlate them.
|
|
* epb_queue 6 4 The epb_queue option is a 32-bit unsigned integer that
|
|
* identifies on which queue of the interface the specific
|
|
* packet was received.
|
|
* epb_verdict 7 variable The epb_verdict option stores a verdict of the packet. The
|
|
* verdict indicates what would be done with the packet after
|
|
* processing it. For example, a firewall could drop the
|
|
* packet. This verdict can be set by various components, i.e.
|
|
* Hardware, Linux's eBPF TC or XDP framework, etc. etc. The
|
|
* first octet specifies the verdict type, while the following
|
|
* octets contain the actual verdict data, whose size depends on
|
|
* the verdict type, and hence from the value in the first
|
|
* octet. The verdict type can be: Hardware (type octet = 0,
|
|
* size = variable), Linux_eBPF_TC (type octet = 1, size = 8
|
|
* (64-bit unsigned integer), value = TC_ACT_* as defined in the
|
|
* Linux pck_cls.h include), Linux_eBPF_XDP (type octet = 2,
|
|
* size = 8 (64-bit unsigned integer), value = xdp_action as
|
|
* defined in the Linux pbf.h include).
|
|
* opt_endofopt 0 0 It delimits the end of the optional fields. This block cannot be repeated within a given list of options.
|
|
*/
|
|
if (rec->opt_comment) {
|
|
option_hdr.type = OPT_COMMENT;
|
|
option_hdr.value_length = comment_len;
|
|
if (!wtap_dump_file_write(wdh, &option_hdr, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
|
|
/* Write the comments string */
|
|
pcapng_debug("pcapng_write_enhanced_packet_block, comment:'%s' comment_len %u comment_pad_len %u" , rec->opt_comment, comment_len, comment_pad_len);
|
|
if (!wtap_dump_file_write(wdh, rec->opt_comment, comment_len, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += comment_len;
|
|
|
|
/* write padding (if any) */
|
|
if (comment_pad_len != 0) {
|
|
if (!wtap_dump_file_write(wdh, &zero_pad, comment_pad_len, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += comment_pad_len;
|
|
}
|
|
|
|
pcapng_debug("pcapng_write_enhanced_packet_block: Wrote Options comments: comment_len %u, comment_pad_len %u",
|
|
comment_len,
|
|
comment_pad_len);
|
|
}
|
|
if (rec->presence_flags & WTAP_HAS_PACK_FLAGS) {
|
|
option_hdr.type = OPT_EPB_FLAGS;
|
|
option_hdr.value_length = 4;
|
|
if (!wtap_dump_file_write(wdh, &option_hdr, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
if (!wtap_dump_file_write(wdh, &rec->rec_header.packet_header.pack_flags, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
pcapng_debug("pcapng_write_enhanced_packet_block: Wrote Options packet flags: %x", rec->rec_header.packet_header.pack_flags);
|
|
}
|
|
if (rec->presence_flags & WTAP_HAS_DROP_COUNT) {
|
|
option_hdr.type = OPT_EPB_DROPCOUNT;
|
|
option_hdr.value_length = 8;
|
|
if (!wtap_dump_file_write(wdh, &option_hdr, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
if (!wtap_dump_file_write(wdh, &rec->rec_header.packet_header.drop_count, 8, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 8;
|
|
pcapng_debug("pcapng_write_enhanced_packet_block: Wrote Options drop count: %" G_GINT64_MODIFIER "u", rec->rec_header.packet_header.drop_count);
|
|
}
|
|
if (rec->presence_flags & WTAP_HAS_PACKET_ID) {
|
|
option_hdr.type = OPT_EPB_PACKETID;
|
|
option_hdr.value_length = 8;
|
|
if (!wtap_dump_file_write(wdh, &option_hdr, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
if (!wtap_dump_file_write(wdh, &rec->rec_header.packet_header.packet_id, 8, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 8;
|
|
pcapng_debug("pcapng_write_enhanced_packet_block: Wrote Options packet id: %" G_GINT64_MODIFIER "u", rec->rec_header.packet_header.packet_id);
|
|
}
|
|
if (rec->presence_flags & WTAP_HAS_INT_QUEUE) {
|
|
option_hdr.type = OPT_EPB_QUEUE;
|
|
option_hdr.value_length = 4;
|
|
if (!wtap_dump_file_write(wdh, &option_hdr, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
if (!wtap_dump_file_write(wdh, &rec->rec_header.packet_header.interface_queue, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
pcapng_debug("pcapng_write_enhanced_packet_block: Wrote Options queue: %u", rec->rec_header.packet_header.interface_queue);
|
|
}
|
|
if (rec->presence_flags & WTAP_HAS_VERDICT && rec->packet_verdict != NULL) {
|
|
|
|
for(guint i = 0; i < rec->packet_verdict->len; i++) {
|
|
gsize len;
|
|
GBytes *verdict = (GBytes *) g_ptr_array_index(rec->packet_verdict, i);
|
|
const guint8 *verdict_data = (const guint8 *) g_bytes_get_data(verdict, &len);
|
|
|
|
if (verdict_data && len != 0) {
|
|
|
|
option_hdr.type = OPT_EPB_VERDICT;
|
|
option_hdr.value_length = (guint16) len;
|
|
if (!wtap_dump_file_write(wdh, &option_hdr, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
if (!wtap_dump_file_write(wdh, verdict_data, len, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += len;
|
|
|
|
if (ROUND_TO_4BYTE(len) != len) {
|
|
size_t plen = ROUND_TO_4BYTE(len) - len;
|
|
|
|
if (!wtap_dump_file_write(wdh, &zero_pad, plen, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += plen;
|
|
}
|
|
pcapng_debug("pcapng_write_enhanced_packet_block: Wrote Options verdict: %u",
|
|
verdict_data[0]);
|
|
}
|
|
}
|
|
}
|
|
/* Write end of options if we have options */
|
|
if (have_options) {
|
|
if (!wtap_dump_file_write(wdh, &zero_pad, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
}
|
|
|
|
/* write block footer */
|
|
if (!wtap_dump_file_write(wdh, &bh.block_total_length,
|
|
sizeof bh.block_total_length, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof bh.block_total_length;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_write_sysdig_event_block(wtap_dumper *wdh, const wtap_rec *rec,
|
|
const guint8 *pd, int *err)
|
|
{
|
|
pcapng_block_header_t bh;
|
|
const guint32 zero_pad = 0;
|
|
guint32 pad_len;
|
|
#if 0
|
|
gboolean have_options = FALSE;
|
|
struct option option_hdr;
|
|
guint32 comment_len = 0, comment_pad_len = 0;
|
|
#endif
|
|
guint32 options_total_length = 0;
|
|
guint16 cpu_id;
|
|
guint64 hdr_ts;
|
|
guint64 ts;
|
|
guint64 thread_id;
|
|
guint32 event_len;
|
|
guint16 event_type;
|
|
|
|
/* Don't write anything we're not willing to read. */
|
|
if (rec->rec_header.syscall_header.event_filelen > WTAP_MAX_PACKET_SIZE_STANDARD) {
|
|
*err = WTAP_ERR_PACKET_TOO_LARGE;
|
|
return FALSE;
|
|
}
|
|
|
|
if (rec->rec_header.syscall_header.event_filelen % 4) {
|
|
pad_len = 4 - (rec->rec_header.syscall_header.event_filelen % 4);
|
|
} else {
|
|
pad_len = 0;
|
|
}
|
|
|
|
#if 0
|
|
/* Check if we should write comment option */
|
|
if (rec->opt_comment) {
|
|
have_options = TRUE;
|
|
comment_len = (guint32)strlen(rec->opt_comment) & 0xffff;
|
|
if ((comment_len % 4)) {
|
|
comment_pad_len = 4 - (comment_len % 4);
|
|
} else {
|
|
comment_pad_len = 0;
|
|
}
|
|
options_total_length = options_total_length + comment_len + comment_pad_len + 4 /* comment options tag */ ;
|
|
}
|
|
if (have_options) {
|
|
/* End-of options tag */
|
|
options_total_length += 4;
|
|
}
|
|
#endif
|
|
|
|
/* write sysdig event block header */
|
|
bh.block_type = BLOCK_TYPE_SYSDIG_EVENT;
|
|
bh.block_total_length = (guint32)sizeof(bh) + SYSDIG_EVENT_HEADER_SIZE + rec->rec_header.syscall_header.event_filelen + pad_len + options_total_length + 4;
|
|
|
|
if (!wtap_dump_file_write(wdh, &bh, sizeof bh, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof bh;
|
|
|
|
/* Sysdig is always LE? */
|
|
cpu_id = GUINT16_TO_LE(rec->rec_header.syscall_header.cpu_id);
|
|
hdr_ts = (((guint64)rec->ts.secs) * 1000000000) + rec->ts.nsecs;
|
|
ts = GUINT64_TO_LE(hdr_ts);
|
|
thread_id = GUINT64_TO_LE(rec->rec_header.syscall_header.thread_id);
|
|
event_len = GUINT32_TO_LE(rec->rec_header.syscall_header.event_len);
|
|
event_type = GUINT16_TO_LE(rec->rec_header.syscall_header.event_type);
|
|
|
|
if (!wtap_dump_file_write(wdh, &cpu_id, sizeof cpu_id, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof cpu_id;
|
|
|
|
if (!wtap_dump_file_write(wdh, &ts, sizeof ts, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof ts;
|
|
|
|
if (!wtap_dump_file_write(wdh, &thread_id, sizeof thread_id, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof thread_id;
|
|
|
|
if (!wtap_dump_file_write(wdh, &event_len, sizeof event_len, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof event_len;
|
|
|
|
if (!wtap_dump_file_write(wdh, &event_type, sizeof event_type, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof event_type;
|
|
|
|
/* write event data */
|
|
if (!wtap_dump_file_write(wdh, pd, rec->rec_header.syscall_header.event_filelen, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += rec->rec_header.syscall_header.event_filelen;
|
|
|
|
/* write padding (if any) */
|
|
if (pad_len != 0) {
|
|
if (!wtap_dump_file_write(wdh, &zero_pad, pad_len, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += pad_len;
|
|
}
|
|
|
|
/* XXX Write comment? */
|
|
|
|
/* write block footer */
|
|
if (!wtap_dump_file_write(wdh, &bh.block_total_length,
|
|
sizeof bh.block_total_length, err))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_write_systemd_journal_export_block(wtap_dumper *wdh, const wtap_rec *rec,
|
|
const guint8 *pd, int *err)
|
|
{
|
|
pcapng_block_header_t bh;
|
|
const guint32 zero_pad = 0;
|
|
guint32 pad_len;
|
|
|
|
/* Don't write anything we're not willing to read. */
|
|
if (rec->rec_header.ft_specific_header.record_len > WTAP_MAX_PACKET_SIZE_STANDARD) {
|
|
*err = WTAP_ERR_PACKET_TOO_LARGE;
|
|
return FALSE;
|
|
}
|
|
|
|
if (rec->rec_header.ft_specific_header.record_len % 4) {
|
|
pad_len = 4 - (rec->rec_header.ft_specific_header.record_len % 4);
|
|
} else {
|
|
pad_len = 0;
|
|
}
|
|
|
|
/* write systemd journal export block header */
|
|
bh.block_type = BLOCK_TYPE_SYSTEMD_JOURNAL;
|
|
bh.block_total_length = (guint32)sizeof(bh) + rec->rec_header.ft_specific_header.record_len + pad_len + 4;
|
|
|
|
pcapng_debug("%s: writing %u bytes, %u padded", G_STRFUNC,
|
|
rec->rec_header.ft_specific_header.record_len,
|
|
bh.block_total_length);
|
|
|
|
if (!wtap_dump_file_write(wdh, &bh, sizeof bh, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof bh;
|
|
|
|
/* write entry data */
|
|
if (!wtap_dump_file_write(wdh, pd, rec->rec_header.ft_specific_header.record_len, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += rec->rec_header.ft_specific_header.record_len;
|
|
|
|
/* write padding (if any) */
|
|
if (pad_len != 0) {
|
|
if (!wtap_dump_file_write(wdh, &zero_pad, pad_len, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += pad_len;
|
|
}
|
|
|
|
/* write block footer */
|
|
if (!wtap_dump_file_write(wdh, &bh.block_total_length,
|
|
sizeof bh.block_total_length, err))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_write_decryption_secrets_block(wtap_dumper *wdh, wtap_block_t sdata, int *err)
|
|
{
|
|
pcapng_block_header_t bh;
|
|
pcapng_decryption_secrets_block_t dsb;
|
|
wtapng_dsb_mandatory_t *mand_data = (wtapng_dsb_mandatory_t *)wtap_block_get_mandatory_data(sdata);
|
|
guint pad_len = (4 - (mand_data->secrets_len & 3)) & 3;
|
|
|
|
/* write block header */
|
|
bh.block_type = BLOCK_TYPE_DSB;
|
|
bh.block_total_length = MIN_DSB_SIZE + mand_data->secrets_len + pad_len;
|
|
pcapng_debug("%s: Total len %u", G_STRFUNC, bh.block_total_length);
|
|
|
|
if (!wtap_dump_file_write(wdh, &bh, sizeof bh, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof bh;
|
|
|
|
/* write block fixed content */
|
|
dsb.secrets_type = mand_data->secrets_type;
|
|
dsb.secrets_len = mand_data->secrets_len;
|
|
if (!wtap_dump_file_write(wdh, &dsb, sizeof dsb, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof dsb;
|
|
|
|
if (!wtap_dump_file_write(wdh, mand_data->secrets_data, mand_data->secrets_len, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += mand_data->secrets_len;
|
|
if (pad_len) {
|
|
const guint32 zero_pad = 0;
|
|
if (!wtap_dump_file_write(wdh, &zero_pad, pad_len, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += pad_len;
|
|
}
|
|
|
|
/* write block footer */
|
|
if (!wtap_dump_file_write(wdh, &bh.block_total_length,
|
|
sizeof bh.block_total_length, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof bh.block_total_length;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* libpcap's maximum pcapng block size is currently 16MB.
|
|
*
|
|
* The maximum pcapng block size in macOS's private pcapng reading code
|
|
* is 1MB. (Yes, this means that a program using the standard pcap
|
|
* code to read pcapng files can handle bigger blocks than can programs
|
|
* using the private code, such as Apple's tcpdump, can handle.)
|
|
*
|
|
* The pcapng reading code here can handle NRBs of arbitrary size (less
|
|
* than 4GB, obviously), as they read each NRB record independently,
|
|
* rather than reading the entire block into memory.
|
|
*
|
|
* So, for now, we set the maximum NRB block size we write as 1 MB.
|
|
*
|
|
* (Yes, for the benefit of the fussy, "MB" is really "MiB".)
|
|
*/
|
|
|
|
#define NRES_BLOCK_MAX_SIZE (1024*1024)
|
|
|
|
static void
|
|
compute_nrb_option_size(wtap_block_t block _U_, guint option_id, wtap_opttype_e option_type _U_, wtap_optval_t* optval, void* user_data)
|
|
{
|
|
pcapng_block_size_t* block_size = (pcapng_block_size_t*)user_data;
|
|
guint32 size = 0;
|
|
|
|
switch(option_id)
|
|
{
|
|
case OPT_COMMENT:
|
|
case OPT_NS_DNSNAME:
|
|
size = pcapng_compute_option_string_size(optval->stringval);
|
|
break;
|
|
case OPT_NS_DNSIP4ADDR:
|
|
size = 4;
|
|
break;
|
|
case OPT_NS_DNSIP6ADDR:
|
|
size = 16;
|
|
break;
|
|
default:
|
|
/* Unknown options - size by datatype? */
|
|
break;
|
|
}
|
|
|
|
block_size->size += size;
|
|
/* Add bytes for option header if option should be written */
|
|
if (size > 0) {
|
|
/* Add optional padding to 32 bits */
|
|
if ((block_size->size & 0x03) != 0)
|
|
{
|
|
block_size->size += 4 - (block_size->size & 0x03);
|
|
}
|
|
block_size->size += 4;
|
|
}
|
|
}
|
|
|
|
static void
|
|
put_nrb_option(wtap_block_t block _U_, guint option_id, wtap_opttype_e option_type _U_, wtap_optval_t* optval, void* user_data)
|
|
{
|
|
guint8 **opt_ptrp = (guint8 **)user_data;
|
|
guint32 size = 0;
|
|
struct pcapng_option_header option_hdr;
|
|
guint32 pad;
|
|
|
|
switch(option_id)
|
|
{
|
|
case OPT_COMMENT:
|
|
case OPT_NS_DNSNAME:
|
|
/* String options don't consider pad bytes part of the length */
|
|
size = (guint32)strlen(optval->stringval) & 0xffff;
|
|
option_hdr.type = (guint16)option_id;
|
|
option_hdr.value_length = (guint16)size;
|
|
memcpy(*opt_ptrp, &option_hdr, 4);
|
|
*opt_ptrp += 4;
|
|
|
|
memcpy(*opt_ptrp, optval->stringval, size);
|
|
*opt_ptrp += size;
|
|
|
|
if ((size % 4)) {
|
|
pad = 4 - (size % 4);
|
|
} else {
|
|
pad = 0;
|
|
}
|
|
|
|
/* put padding (if any) */
|
|
if (pad != 0) {
|
|
memset(*opt_ptrp, 0, pad);
|
|
*opt_ptrp += pad;
|
|
}
|
|
break;
|
|
case OPT_NS_DNSIP4ADDR:
|
|
option_hdr.type = (guint16)option_id;
|
|
option_hdr.value_length = 4;
|
|
memcpy(*opt_ptrp, &option_hdr, 4);
|
|
*opt_ptrp += 4;
|
|
|
|
memcpy(*opt_ptrp, &optval->ipv4val, 4);
|
|
*opt_ptrp += 4;
|
|
break;
|
|
case OPT_NS_DNSIP6ADDR:
|
|
option_hdr.type = (guint16)option_id;
|
|
option_hdr.value_length = 16;
|
|
memcpy(*opt_ptrp, &option_hdr, 4);
|
|
*opt_ptrp += 4;
|
|
|
|
memcpy(*opt_ptrp, &optval->ipv6val, 16);
|
|
*opt_ptrp += 16;
|
|
break;
|
|
default:
|
|
/* Unknown options - size by datatype? */
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
put_nrb_options(wtap_dumper *wdh, guint8 *opt_ptr)
|
|
{
|
|
if (wdh->nrb_hdrs && wdh->nrb_hdrs->len > 0) {
|
|
wtap_block_t nrb_hdr = g_array_index(wdh->nrb_hdrs, wtap_block_t, 0);
|
|
struct option option_hdr;
|
|
|
|
wtap_block_foreach_option(nrb_hdr, put_nrb_option, &opt_ptr);
|
|
|
|
/* Put end of options */
|
|
option_hdr.type = OPT_EOFOPT;
|
|
option_hdr.value_length = 0;
|
|
memcpy(opt_ptr, &option_hdr, 4);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_write_name_resolution_block(wtap_dumper *wdh, int *err)
|
|
{
|
|
pcapng_block_header_t bh;
|
|
pcapng_name_resolution_block_t nrb;
|
|
pcapng_block_size_t opts_size;
|
|
size_t max_rec_data_size;
|
|
guint8 *block_data;
|
|
guint32 block_off;
|
|
size_t hostnamelen;
|
|
guint16 namelen;
|
|
guint32 tot_rec_len;
|
|
hashipv4_t *ipv4_hash_list_entry;
|
|
hashipv6_t *ipv6_hash_list_entry;
|
|
int i;
|
|
|
|
if (wtap_addrinfo_list_empty(wdh->addrinfo_lists)) {
|
|
/*
|
|
* No name/address pairs to write.
|
|
* XXX - what if we have options?
|
|
*/
|
|
return TRUE;
|
|
}
|
|
|
|
/* Calculate the space needed for options. */
|
|
opts_size.size = 0;
|
|
if (wdh->nrb_hdrs && wdh->nrb_hdrs->len > 0) {
|
|
wtap_block_t nrb_hdr = g_array_index(wdh->nrb_hdrs, wtap_block_t, 0);
|
|
|
|
wtap_block_foreach_option(nrb_hdr, compute_nrb_option_size, &opts_size);
|
|
if (opts_size.size > 0) {
|
|
/* End-of options tag */
|
|
opts_size.size += 4;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Make sure we can fit at least one maximum-sized record, plus
|
|
* an end-of-records record, plus the options, into a maximum-sized
|
|
* block.
|
|
*
|
|
* That requires that there be enough space for the block header
|
|
* (8 bytes), a maximum-sized record (2 bytes of record type, 2
|
|
* bytes of record value length, 65535 bytes of record value,
|
|
* and 1 byte of padding), an end-of-records record (4 bytes),
|
|
* the options (opts_size.size bytes), and the block trailer (4
|
|
* bytes).
|
|
*/
|
|
if (8 + 2 + 2 + 65535 + 1 + 4 + opts_size.size + 4 > NRES_BLOCK_MAX_SIZE) {
|
|
/*
|
|
* XXX - we can't even fit the options in the largest NRB size
|
|
* we're willing to write and still have room enough for a
|
|
* maximum-sized record. Just discard the information for now.
|
|
*/
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Allocate a buffer for the largest block we'll write.
|
|
*/
|
|
block_data = (guint8 *)g_malloc(NRES_BLOCK_MAX_SIZE);
|
|
|
|
/*
|
|
* Calculate the maximum amount of record data we'll be able to
|
|
* fit into such a block, after taking into account the block header
|
|
* (8 bytes), the end-of-records record (4 bytes), the options
|
|
* (opts_size.size bytes), and the block trailer (4 bytes).
|
|
*/
|
|
max_rec_data_size = NRES_BLOCK_MAX_SIZE - (8 + 4 + opts_size.size + 4);
|
|
|
|
block_off = 8; /* block type + block total length */
|
|
bh.block_type = BLOCK_TYPE_NRB;
|
|
bh.block_total_length = 12; /* block header + block trailer */
|
|
|
|
/*
|
|
* Write out the IPv4 resolved addresses, if any.
|
|
*/
|
|
if (wdh->addrinfo_lists->ipv4_addr_list){
|
|
i = 0;
|
|
ipv4_hash_list_entry = (hashipv4_t *)g_list_nth_data(wdh->addrinfo_lists->ipv4_addr_list, i);
|
|
while(ipv4_hash_list_entry != NULL){
|
|
|
|
nrb.record_type = NRES_IP4RECORD;
|
|
hostnamelen = strlen(ipv4_hash_list_entry->name);
|
|
if (hostnamelen > (G_MAXUINT16 - 4) - 1) {
|
|
/*
|
|
* This won't fit in the largest possible NRB record;
|
|
* discard it.
|
|
*/
|
|
i++;
|
|
ipv4_hash_list_entry = (hashipv4_t *)g_list_nth_data(wdh->addrinfo_lists->ipv4_addr_list, i);
|
|
continue;
|
|
}
|
|
namelen = (guint16)(hostnamelen + 1);
|
|
nrb.record_len = 4 + namelen; /* 4 bytes IPv4 address length */
|
|
/* 2 bytes record type, 2 bytes length field */
|
|
tot_rec_len = 4 + nrb.record_len + PADDING4(nrb.record_len);
|
|
|
|
if (block_off + tot_rec_len > max_rec_data_size) {
|
|
/*
|
|
* This record would overflow our maximum size for Name
|
|
* Resolution Blocks; write out all the records we created
|
|
* before it, and start a new NRB.
|
|
*/
|
|
|
|
/* Append the end-of-records record */
|
|
memset(block_data + block_off, 0, 4);
|
|
block_off += 4;
|
|
bh.block_total_length += 4;
|
|
|
|
/*
|
|
* Put the options into the block.
|
|
*
|
|
* XXX - this puts the same options in all NRBs.
|
|
*/
|
|
put_nrb_options(wdh, block_data + block_off);
|
|
block_off += opts_size.size;
|
|
bh.block_total_length += opts_size.size;
|
|
|
|
/* Copy the block header. */
|
|
memcpy(block_data, &bh, sizeof(bh));
|
|
|
|
/* Copy the block trailer. */
|
|
memcpy(block_data + block_off, &bh.block_total_length, sizeof(bh.block_total_length));
|
|
|
|
pcapng_debug("pcapng_write_name_resolution_block: Write bh.block_total_length bytes %d, block_off %u", bh.block_total_length, block_off);
|
|
|
|
if (!wtap_dump_file_write(wdh, block_data, bh.block_total_length, err)) {
|
|
g_free(block_data);
|
|
return FALSE;
|
|
}
|
|
wdh->bytes_dumped += bh.block_total_length;
|
|
|
|
/*Start a new NRB */
|
|
block_off = 8; /* block type + block total length */
|
|
bh.block_type = BLOCK_TYPE_NRB;
|
|
bh.block_total_length = 12; /* block header + block trailer */
|
|
}
|
|
|
|
bh.block_total_length += tot_rec_len;
|
|
memcpy(block_data + block_off, &nrb, sizeof(nrb));
|
|
block_off += 4;
|
|
memcpy(block_data + block_off, &(ipv4_hash_list_entry->addr), 4);
|
|
block_off += 4;
|
|
memcpy(block_data + block_off, ipv4_hash_list_entry->name, namelen);
|
|
block_off += namelen;
|
|
memset(block_data + block_off, 0, PADDING4(namelen));
|
|
block_off += PADDING4(namelen);
|
|
pcapng_debug("NRB: added IPv4 record for %s", ipv4_hash_list_entry->name);
|
|
|
|
i++;
|
|
ipv4_hash_list_entry = (hashipv4_t *)g_list_nth_data(wdh->addrinfo_lists->ipv4_addr_list, i);
|
|
}
|
|
g_list_free(wdh->addrinfo_lists->ipv4_addr_list);
|
|
wdh->addrinfo_lists->ipv4_addr_list = NULL;
|
|
}
|
|
|
|
if (wdh->addrinfo_lists->ipv6_addr_list){
|
|
i = 0;
|
|
ipv6_hash_list_entry = (hashipv6_t *)g_list_nth_data(wdh->addrinfo_lists->ipv6_addr_list, i);
|
|
while(ipv6_hash_list_entry != NULL){
|
|
|
|
nrb.record_type = NRES_IP6RECORD;
|
|
hostnamelen = strlen(ipv6_hash_list_entry->name);
|
|
if (hostnamelen > (G_MAXUINT16 - 16) - 1) {
|
|
/*
|
|
* This won't fit in the largest possible NRB record;
|
|
* discard it.
|
|
*/
|
|
i++;
|
|
ipv6_hash_list_entry = (hashipv6_t *)g_list_nth_data(wdh->addrinfo_lists->ipv6_addr_list, i);
|
|
continue;
|
|
}
|
|
namelen = (guint16)(hostnamelen + 1);
|
|
nrb.record_len = 16 + namelen; /* 16 bytes IPv6 address length */
|
|
/* 2 bytes record type, 2 bytes length field */
|
|
tot_rec_len = 4 + nrb.record_len + PADDING4(nrb.record_len);
|
|
|
|
if (block_off + tot_rec_len > max_rec_data_size) {
|
|
/*
|
|
* This record would overflow our maximum size for Name
|
|
* Resolution Blocks; write out all the records we created
|
|
* before it, and start a new NRB.
|
|
*/
|
|
|
|
/* Append the end-of-records record */
|
|
memset(block_data + block_off, 0, 4);
|
|
block_off += 4;
|
|
bh.block_total_length += 4;
|
|
|
|
/*
|
|
* Put the options into the block.
|
|
*
|
|
* XXX - this puts the same options in all NRBs.
|
|
*/
|
|
put_nrb_options(wdh, block_data + block_off);
|
|
block_off += opts_size.size;
|
|
bh.block_total_length += opts_size.size;
|
|
|
|
/* Copy the block header. */
|
|
memcpy(block_data, &bh, sizeof(bh));
|
|
|
|
/* Copy the block trailer. */
|
|
memcpy(block_data + block_off, &bh.block_total_length, sizeof(bh.block_total_length));
|
|
|
|
pcapng_debug("pcapng_write_name_resolution_block: Write bh.block_total_length bytes %d, block_off %u", bh.block_total_length, block_off);
|
|
|
|
if (!wtap_dump_file_write(wdh, block_data, bh.block_total_length, err)) {
|
|
g_free(block_data);
|
|
return FALSE;
|
|
}
|
|
wdh->bytes_dumped += bh.block_total_length;
|
|
|
|
/*Start a new NRB */
|
|
block_off = 8; /* block type + block total length */
|
|
bh.block_type = BLOCK_TYPE_NRB;
|
|
bh.block_total_length = 12; /* block header + block trailer */
|
|
}
|
|
|
|
bh.block_total_length += tot_rec_len;
|
|
memcpy(block_data + block_off, &nrb, sizeof(nrb));
|
|
block_off += 4;
|
|
memcpy(block_data + block_off, &(ipv6_hash_list_entry->addr), 16);
|
|
block_off += 16;
|
|
memcpy(block_data + block_off, ipv6_hash_list_entry->name, namelen);
|
|
block_off += namelen;
|
|
memset(block_data + block_off, 0, PADDING4(namelen));
|
|
block_off += PADDING4(namelen);
|
|
pcapng_debug("NRB: added IPv6 record for %s", ipv6_hash_list_entry->name);
|
|
|
|
i++;
|
|
ipv6_hash_list_entry = (hashipv6_t *)g_list_nth_data(wdh->addrinfo_lists->ipv6_addr_list, i);
|
|
}
|
|
g_list_free(wdh->addrinfo_lists->ipv6_addr_list);
|
|
wdh->addrinfo_lists->ipv6_addr_list = NULL;
|
|
}
|
|
|
|
/* Append the end-of-records record */
|
|
memset(block_data + block_off, 0, 4);
|
|
block_off += 4;
|
|
bh.block_total_length += 4;
|
|
|
|
/*
|
|
* Put the options into the block.
|
|
*/
|
|
put_nrb_options(wdh, block_data + block_off);
|
|
block_off += opts_size.size;
|
|
bh.block_total_length += opts_size.size;
|
|
|
|
/* Copy the block header. */
|
|
memcpy(block_data, &bh, sizeof(bh));
|
|
|
|
/* Copy the block trailer. */
|
|
memcpy(block_data + block_off, &bh.block_total_length, sizeof(bh.block_total_length));
|
|
|
|
pcapng_debug("pcapng_write_name_resolution_block: Write bh.block_total_length bytes %d, block_off %u", bh.block_total_length, block_off);
|
|
|
|
if (!wtap_dump_file_write(wdh, block_data, bh.block_total_length, err)) {
|
|
g_free(block_data);
|
|
return FALSE;
|
|
}
|
|
wdh->bytes_dumped += bh.block_total_length;
|
|
|
|
g_free(block_data);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void compute_isb_option_size(wtap_block_t block _U_, guint option_id, wtap_opttype_e option_type _U_, wtap_optval_t *optval, void* user_data)
|
|
{
|
|
pcapng_block_size_t* block_size = (pcapng_block_size_t*)user_data;
|
|
guint32 size = 0;
|
|
|
|
switch(option_id)
|
|
{
|
|
case OPT_COMMENT:
|
|
size = pcapng_compute_option_string_size(optval->stringval);
|
|
break;
|
|
case OPT_ISB_STARTTIME:
|
|
case OPT_ISB_ENDTIME:
|
|
size = 8;
|
|
break;
|
|
case OPT_ISB_IFRECV:
|
|
case OPT_ISB_IFDROP:
|
|
case OPT_ISB_FILTERACCEPT:
|
|
case OPT_ISB_OSDROP:
|
|
case OPT_ISB_USRDELIV:
|
|
size = 8;
|
|
break;
|
|
default:
|
|
/* Unknown options - size by datatype? */
|
|
break;
|
|
}
|
|
|
|
block_size->size += size;
|
|
/* Add bytes for option header if option should be written */
|
|
if (size > 0) {
|
|
/* Add optional padding to 32 bits */
|
|
if ((block_size->size & 0x03) != 0)
|
|
{
|
|
block_size->size += 4 - (block_size->size & 0x03);
|
|
}
|
|
block_size->size += 4;
|
|
}
|
|
}
|
|
|
|
static void write_wtap_isb_option(wtap_block_t block _U_, guint option_id, wtap_opttype_e option_type _U_, wtap_optval_t *optval, void* user_data)
|
|
{
|
|
pcapng_write_block_t* write_block = (pcapng_write_block_t*)user_data;
|
|
struct pcapng_option_header option_hdr;
|
|
|
|
/* Don't continue if there has been an error */
|
|
if (!write_block->success)
|
|
return;
|
|
|
|
switch(option_id)
|
|
{
|
|
case OPT_COMMENT:
|
|
if (!pcapng_write_option_string(write_block->wdh, option_id, optval->stringval, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
break;
|
|
case OPT_ISB_STARTTIME:
|
|
case OPT_ISB_ENDTIME:
|
|
{
|
|
guint32 high, low;
|
|
|
|
option_hdr.type = option_id;
|
|
option_hdr.value_length = 8;
|
|
if (!wtap_dump_file_write(write_block->wdh, &option_hdr, 4, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 4;
|
|
|
|
high = (guint32)(optval->uint64val >> 32);
|
|
low = (guint32)(optval->uint64val >> 0);
|
|
if (!wtap_dump_file_write(write_block->wdh, &high, sizeof(guint32), write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 4;
|
|
if (!wtap_dump_file_write(write_block->wdh, &low, sizeof(guint32), write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 4;
|
|
}
|
|
break;
|
|
case OPT_ISB_IFRECV:
|
|
case OPT_ISB_IFDROP:
|
|
case OPT_ISB_FILTERACCEPT:
|
|
case OPT_ISB_OSDROP:
|
|
case OPT_ISB_USRDELIV:
|
|
{
|
|
option_hdr.type = option_id;
|
|
option_hdr.value_length = 8;
|
|
if (!wtap_dump_file_write(write_block->wdh, &option_hdr, 4, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 4;
|
|
|
|
if (!wtap_dump_file_write(write_block->wdh, &optval->uint64val, sizeof(guint64), write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 8;
|
|
}
|
|
break;
|
|
default:
|
|
/* Unknown options - write by datatype? */
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_write_interface_statistics_block(wtap_dumper *wdh, wtap_block_t if_stats, int *err)
|
|
{
|
|
pcapng_block_header_t bh;
|
|
pcapng_interface_statistics_block_t isb;
|
|
pcapng_block_size_t block_size;
|
|
pcapng_write_block_t block_data;
|
|
struct pcapng_option_header option_hdr;
|
|
wtapng_if_stats_mandatory_t* mand_data = (wtapng_if_stats_mandatory_t*)wtap_block_get_mandatory_data(if_stats);
|
|
|
|
pcapng_debug("pcapng_write_interface_statistics_block");
|
|
|
|
/* Compute block size */
|
|
block_size.size = 0;
|
|
wtap_block_foreach_option(if_stats, compute_isb_option_size, &block_size);
|
|
|
|
if (block_size.size > 0) {
|
|
/* End-of-options tag */
|
|
block_size.size += 4;
|
|
}
|
|
|
|
/* write block header */
|
|
bh.block_type = BLOCK_TYPE_ISB;
|
|
bh.block_total_length = (guint32)(sizeof(bh) + sizeof(isb) + block_size.size + 4);
|
|
pcapng_debug("pcapng_write_interface_statistics_block: Total len %u", bh.block_total_length);
|
|
|
|
if (!wtap_dump_file_write(wdh, &bh, sizeof bh, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof bh;
|
|
|
|
/* write block fixed content */
|
|
isb.interface_id = mand_data->interface_id;
|
|
isb.timestamp_high = mand_data->ts_high;
|
|
isb.timestamp_low = mand_data->ts_low;
|
|
|
|
if (!wtap_dump_file_write(wdh, &isb, sizeof isb, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof isb;
|
|
|
|
/* Write options */
|
|
if (block_size.size > 0) {
|
|
block_data.wdh = wdh;
|
|
block_data.err = err;
|
|
block_data.success = TRUE;
|
|
wtap_block_foreach_option(if_stats, write_wtap_isb_option, &block_data);
|
|
|
|
if (!block_data.success)
|
|
return FALSE;
|
|
|
|
/* Write end of options */
|
|
option_hdr.type = OPT_EOFOPT;
|
|
option_hdr.value_length = 0;
|
|
if (!wtap_dump_file_write(wdh, &option_hdr, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
}
|
|
|
|
/* write block footer */
|
|
if (!wtap_dump_file_write(wdh, &bh.block_total_length,
|
|
sizeof bh.block_total_length, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof bh.block_total_length;
|
|
return TRUE;
|
|
}
|
|
|
|
static void compute_idb_option_size(wtap_block_t block _U_, guint option_id, wtap_opttype_e option_type _U_, wtap_optval_t *optval, void* user_data)
|
|
{
|
|
pcapng_block_size_t* block_size = (pcapng_block_size_t*)user_data;
|
|
guint32 size = 0;
|
|
|
|
switch(option_id)
|
|
{
|
|
case OPT_COMMENT:
|
|
case OPT_IDB_NAME:
|
|
case OPT_IDB_DESCR:
|
|
case OPT_IDB_OS:
|
|
case OPT_IDB_HARDWARE:
|
|
size = pcapng_compute_option_string_size(optval->stringval);
|
|
break;
|
|
case OPT_IDB_SPEED:
|
|
size = 8;
|
|
break;
|
|
case OPT_IDB_TSRESOL:
|
|
size = 1;
|
|
break;
|
|
case OPT_IDB_FILTER:
|
|
{
|
|
wtapng_if_descr_filter_t* filter = (wtapng_if_descr_filter_t*)optval->customval.data;
|
|
guint32 pad;
|
|
if (filter->if_filter_str != NULL) {
|
|
size = (guint32)(strlen(filter->if_filter_str) + 1) & 0xffff;
|
|
if ((size % 4)) {
|
|
pad = 4 - (size % 4);
|
|
} else {
|
|
pad = 0;
|
|
}
|
|
|
|
size += pad;
|
|
}
|
|
}
|
|
break;
|
|
case OPT_IDB_FCSLEN:
|
|
/* XXX - Not currently writing value */
|
|
break;
|
|
default:
|
|
/* Unknown options - size by datatype? */
|
|
break;
|
|
}
|
|
|
|
block_size->size += size;
|
|
/* Add bytes for option header if option should be written */
|
|
if (size > 0) {
|
|
/* Add optional padding to 32 bits */
|
|
if ((block_size->size & 0x03) != 0)
|
|
{
|
|
block_size->size += 4 - (block_size->size & 0x03);
|
|
}
|
|
block_size->size += 4;
|
|
}
|
|
}
|
|
|
|
static void write_wtap_idb_option(wtap_block_t block _U_, guint option_id, wtap_opttype_e option_type _U_, wtap_optval_t *optval, void* user_data)
|
|
{
|
|
pcapng_write_block_t* write_block = (pcapng_write_block_t*)user_data;
|
|
struct pcapng_option_header option_hdr;
|
|
const guint32 zero_pad = 0;
|
|
|
|
switch(option_id)
|
|
{
|
|
case OPT_COMMENT:
|
|
case OPT_IDB_NAME:
|
|
case OPT_IDB_DESCR:
|
|
case OPT_IDB_OS:
|
|
case OPT_IDB_HARDWARE:
|
|
if (!pcapng_write_option_string(write_block->wdh, option_id, optval->stringval, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
break;
|
|
case OPT_IDB_SPEED:
|
|
option_hdr.type = option_id;
|
|
option_hdr.value_length = 8;
|
|
if (!wtap_dump_file_write(write_block->wdh, &option_hdr, 4, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 4;
|
|
|
|
if (!wtap_dump_file_write(write_block->wdh, &optval->uint64val, sizeof(guint64), write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 8;
|
|
break;
|
|
case OPT_IDB_TSRESOL:
|
|
option_hdr.type = option_id;
|
|
option_hdr.value_length = 1;
|
|
if (!wtap_dump_file_write(write_block->wdh, &option_hdr, 4, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 4;
|
|
|
|
if (!wtap_dump_file_write(write_block->wdh, &optval->uint8val, 1, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 1;
|
|
|
|
if (!wtap_dump_file_write(write_block->wdh, &zero_pad, 3, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 3;
|
|
break;
|
|
case OPT_IDB_FILTER:
|
|
{
|
|
wtapng_if_descr_filter_t* filter = (wtapng_if_descr_filter_t*)optval->customval.data;
|
|
guint32 size, pad;
|
|
if (filter->if_filter_str != NULL) {
|
|
size = (guint32)(strlen(filter->if_filter_str) + 1) & 0xffff;
|
|
if ((size % 4)) {
|
|
pad = 4 - (size % 4);
|
|
} else {
|
|
pad = 0;
|
|
}
|
|
|
|
option_hdr.type = option_id;
|
|
option_hdr.value_length = size;
|
|
if (!wtap_dump_file_write(write_block->wdh, &option_hdr, 4, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 4;
|
|
|
|
/* Write the zero indicating libpcap filter variant */
|
|
if (!wtap_dump_file_write(write_block->wdh, &zero_pad, 1, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += 1;
|
|
|
|
/* if_filter_str_len includes the leading byte indicating filter type (libpcap str or BPF code) */
|
|
if (!wtap_dump_file_write(write_block->wdh, filter->if_filter_str, size-1, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += size - 1;
|
|
|
|
/* write padding (if any) */
|
|
if (pad != 0) {
|
|
if (!wtap_dump_file_write(write_block->wdh, &zero_pad, pad, write_block->err)) {
|
|
write_block->success = FALSE;
|
|
return;
|
|
}
|
|
write_block->wdh->bytes_dumped += pad;
|
|
}
|
|
|
|
}
|
|
}
|
|
break;
|
|
case OPT_IDB_FCSLEN:
|
|
/* XXX - Not currently writing value */
|
|
break;
|
|
default:
|
|
/* Unknown options - size by datatype? */
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
pcapng_write_if_descr_block(wtap_dumper *wdh, wtap_block_t int_data, int *err)
|
|
{
|
|
pcapng_block_header_t bh;
|
|
pcapng_interface_description_block_t idb;
|
|
pcapng_block_size_t block_size;
|
|
pcapng_write_block_t block_data;
|
|
struct pcapng_option_header option_hdr;
|
|
wtapng_if_descr_mandatory_t* mand_data = (wtapng_if_descr_mandatory_t*)wtap_block_get_mandatory_data(int_data);
|
|
int link_type;
|
|
|
|
pcapng_debug("pcapng_write_if_descr_block: encap = %d (%s), snaplen = %d",
|
|
mand_data->wtap_encap,
|
|
wtap_encap_description(mand_data->wtap_encap),
|
|
mand_data->snap_len);
|
|
|
|
link_type = wtap_wtap_encap_to_pcap_encap(mand_data->wtap_encap);
|
|
if (link_type == -1) {
|
|
if (!pcapng_encap_is_ft_specific(mand_data->wtap_encap)) {
|
|
*err = WTAP_ERR_UNWRITABLE_ENCAP;
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* Compute block size */
|
|
block_size.size = 0;
|
|
wtap_block_foreach_option(int_data, compute_idb_option_size, &block_size);
|
|
|
|
if (block_size.size > 0) {
|
|
/* End-of-options tag */
|
|
block_size.size += 4;
|
|
}
|
|
|
|
/* write block header */
|
|
bh.block_type = BLOCK_TYPE_IDB;
|
|
bh.block_total_length = (guint32)(sizeof(bh) + sizeof(idb) + block_size.size + 4);
|
|
pcapng_debug("pcapng_write_if_descr_block: Total len %u", bh.block_total_length);
|
|
|
|
if (!wtap_dump_file_write(wdh, &bh, sizeof bh, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof bh;
|
|
|
|
/* write block fixed content */
|
|
idb.linktype = link_type;
|
|
idb.reserved = 0;
|
|
idb.snaplen = mand_data->snap_len;
|
|
|
|
if (!wtap_dump_file_write(wdh, &idb, sizeof idb, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += sizeof idb;
|
|
|
|
if (block_size.size > 0) {
|
|
/* Write options */
|
|
block_data.wdh = wdh;
|
|
block_data.err = err;
|
|
block_data.success = TRUE;
|
|
wtap_block_foreach_option(int_data, write_wtap_idb_option, &block_data);
|
|
|
|
if (!block_data.success)
|
|
return FALSE;
|
|
|
|
/* Write end of options */
|
|
option_hdr.type = OPT_EOFOPT;
|
|
option_hdr.value_length = 0;
|
|
if (!wtap_dump_file_write(wdh, &option_hdr, 4, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += 4;
|
|
}
|
|
|
|
/* write block footer */
|
|
if (!wtap_dump_file_write(wdh, &bh.block_total_length,
|
|
sizeof bh.block_total_length, err))
|
|
return FALSE;
|
|
|
|
wdh->bytes_dumped += sizeof bh.block_total_length;
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean pcapng_dump(wtap_dumper *wdh,
|
|
const wtap_rec *rec,
|
|
const guint8 *pd, int *err, gchar **err_info _U_)
|
|
{
|
|
#ifdef HAVE_PLUGINS
|
|
block_handler *handler;
|
|
#endif
|
|
|
|
/* Write (optional) Decryption Secrets Blocks that were collected while
|
|
* reading packet blocks. */
|
|
if (wdh->dsbs_growing) {
|
|
for (guint i = wdh->dsbs_growing_written; i < wdh->dsbs_growing->len; i++) {
|
|
pcapng_debug("%s: writing DSB %u", G_STRFUNC, i);
|
|
wtap_block_t dsb = g_array_index(wdh->dsbs_growing, wtap_block_t, i);
|
|
if (!pcapng_write_decryption_secrets_block(wdh, dsb, err)) {
|
|
return FALSE;
|
|
}
|
|
++wdh->dsbs_growing_written;
|
|
}
|
|
}
|
|
|
|
|
|
pcapng_debug("%s: encap = %d (%s) rec type = %u", G_STRFUNC,
|
|
rec->rec_header.packet_header.pkt_encap,
|
|
wtap_encap_description(rec->rec_header.packet_header.pkt_encap),
|
|
rec->rec_type);
|
|
|
|
switch (rec->rec_type) {
|
|
|
|
case REC_TYPE_PACKET:
|
|
/*
|
|
* XXX - write a Simple Packet Block if there's no time
|
|
* stamp or other information that doesn't appear in an
|
|
* SPB?
|
|
*/
|
|
if (!pcapng_write_enhanced_packet_block(wdh, rec, pd, err)) {
|
|
return FALSE;
|
|
}
|
|
break;
|
|
|
|
case REC_TYPE_FT_SPECIFIC_EVENT:
|
|
case REC_TYPE_FT_SPECIFIC_REPORT:
|
|
if (rec->rec_header.ft_specific_header.record_type == WTAP_FILE_TYPE_SUBTYPE_SYSTEMD_JOURNAL) {
|
|
if (!pcapng_write_systemd_journal_export_block(wdh, rec, pd, err)) {
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
#ifdef HAVE_PLUGINS
|
|
/*
|
|
* Do we have a handler for this block type?
|
|
*/
|
|
if (block_handlers != NULL &&
|
|
(handler = (block_handler *)g_hash_table_lookup(block_handlers,
|
|
GUINT_TO_POINTER(rec->rec_header.ft_specific_header.record_type))) != NULL) {
|
|
/* Yes. Call it to write out this record. */
|
|
if (!handler->writer(wdh, rec, pd, err))
|
|
return FALSE;
|
|
} else
|
|
#endif
|
|
{
|
|
/* No. */
|
|
*err = WTAP_ERR_UNWRITABLE_REC_TYPE;
|
|
return FALSE;
|
|
}
|
|
break;
|
|
|
|
case REC_TYPE_SYSCALL:
|
|
if (!pcapng_write_sysdig_event_block(wdh, rec, pd, err)) {
|
|
return FALSE;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/* We don't support writing this record type. */
|
|
*err = WTAP_ERR_UNWRITABLE_REC_TYPE;
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Finish writing to a dump file.
|
|
Returns TRUE on success, FALSE on failure. */
|
|
static gboolean pcapng_dump_finish(wtap_dumper *wdh, int *err)
|
|
{
|
|
guint i, j;
|
|
|
|
/* Flush any hostname resolution info we may have */
|
|
pcapng_write_name_resolution_block(wdh, err);
|
|
|
|
for (i = 0; i < wdh->interface_data->len; i++) {
|
|
|
|
/* Get the interface description */
|
|
wtap_block_t int_data;
|
|
wtapng_if_descr_mandatory_t *int_data_mand;
|
|
|
|
int_data = g_array_index(wdh->interface_data, wtap_block_t, i);
|
|
int_data_mand = (wtapng_if_descr_mandatory_t*)wtap_block_get_mandatory_data(int_data);
|
|
|
|
for (j = 0; j < int_data_mand->num_stat_entries; j++) {
|
|
wtap_block_t if_stats;
|
|
|
|
if_stats = g_array_index(int_data_mand->interface_statistics, wtap_block_t, j);
|
|
pcapng_debug("pcapng_dump_finish: write ISB for interface %u", ((wtapng_if_stats_mandatory_t*)wtap_block_get_mandatory_data(if_stats))->interface_id);
|
|
if (!pcapng_write_interface_statistics_block(wdh, if_stats, err)) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
pcapng_debug("pcapng_dump_finish");
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Returns TRUE on success, FALSE on failure; sets "*err" to an error code on
|
|
failure */
|
|
gboolean
|
|
pcapng_dump_open(wtap_dumper *wdh, int *err)
|
|
{
|
|
guint i;
|
|
|
|
pcapng_debug("pcapng_dump_open");
|
|
/* This is a pcapng file */
|
|
wdh->subtype_write = pcapng_dump;
|
|
wdh->subtype_finish = pcapng_dump_finish;
|
|
|
|
// XXX IDBs should be optional.
|
|
if (wdh->interface_data->len == 0) {
|
|
pcapng_debug("There are no interfaces. Can't handle that...");
|
|
*err = WTAP_ERR_INTERNAL;
|
|
return FALSE;
|
|
}
|
|
|
|
/* write the section header block */
|
|
if (!pcapng_write_section_header_block(wdh, err)) {
|
|
return FALSE;
|
|
}
|
|
pcapng_debug("pcapng_dump_open: wrote section header block.");
|
|
|
|
/* Write the Interface description blocks */
|
|
pcapng_debug("pcapng_dump_open: Number of IDB:s to write (number of interfaces) %u",
|
|
wdh->interface_data->len);
|
|
|
|
for (i = 0; i < wdh->interface_data->len; i++) {
|
|
|
|
/* Get the interface description */
|
|
wtap_block_t idb;
|
|
|
|
idb = g_array_index(wdh->interface_data, wtap_block_t, i);
|
|
|
|
if (!pcapng_write_if_descr_block(wdh, idb, err)) {
|
|
return FALSE;
|
|
}
|
|
|
|
}
|
|
|
|
/* Write (optional) fixed Decryption Secrets Blocks. */
|
|
if (wdh->dsbs_initial) {
|
|
for (i = 0; i < wdh->dsbs_initial->len; i++) {
|
|
wtap_block_t dsb = g_array_index(wdh->dsbs_initial, wtap_block_t, i);
|
|
if (!pcapng_write_decryption_secrets_block(wdh, dsb, err)) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Returns 0 if we could write the specified encapsulation type,
|
|
an error indication otherwise. */
|
|
int pcapng_dump_can_write_encap(int wtap_encap)
|
|
{
|
|
pcapng_debug("pcapng_dump_can_write_encap: encap = %d (%s)",
|
|
wtap_encap,
|
|
wtap_encap_description(wtap_encap));
|
|
|
|
/* Per-packet encapsulation is supported. */
|
|
if (wtap_encap == WTAP_ENCAP_PER_PACKET)
|
|
return 0;
|
|
|
|
/* Is it a filetype-specific encapsulation that we support? */
|
|
if (pcapng_encap_is_ft_specific(wtap_encap)) {
|
|
return 0;
|
|
}
|
|
|
|
/* Make sure we can figure out this DLT type */
|
|
if (wtap_wtap_encap_to_pcap_encap(wtap_encap) == -1)
|
|
return WTAP_ERR_UNWRITABLE_ENCAP;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns TRUE if the specified encapsulation type is filetype-specific
|
|
* and one that we support.
|
|
*/
|
|
gboolean pcapng_encap_is_ft_specific(int encap)
|
|
{
|
|
switch (encap) {
|
|
case WTAP_ENCAP_SYSTEMD_JOURNAL:
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* 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:
|
|
*/
|