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wireshark/writecap/pcapio.c
AndersBroman bd9afdddfe Reduce number of fwrite when writing pcap-ng EPB. 
According to callgrind with the patch dumping 3000 pakets the number of
calls to write_to_file is reduced from 11541 to 9000 reducing the number
of lr from 4 681 518 to 4 314 101.

If the buffer holding the packet was guaranteed to be padded to 32 bit
boundary the code could be simplified and if there was space "in front"
for the packet header it would be even better.

Change-Id: Ie991c05fa9d831ee4d703bd47b8123f2b1f83277
Reviewed-on: https://code.wireshark.org/review/20256
Petri-Dish: Anders Broman <a.broman58@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
2017-02-24 04:42:31 +00:00

768 lines
30 KiB
C
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/* pcapio.c
* Our own private code for writing libpcap files when capturing.
*
* We have these because we want a way to open a stream for output given
* only a file descriptor. libpcap 0.9[.x] has "pcap_dump_fopen()", which
* provides that, but
*
* 1) earlier versions of libpcap doesn't have it
*
* and
*
* 2) WinPcap doesn't have it, because a file descriptor opened
* by code built for one version of the MSVC++ C library
* can't be used by library routines built for another version
* (e.g., threaded vs. unthreaded).
*
* Libpcap's pcap_dump() also doesn't return any error indications.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Derived from code in the Wiretap Library
* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef _WIN32
#include <Windows.h>
#endif
#include <glib.h>
#include "pcapio.h"
/* Magic numbers in "libpcap" files.
"libpcap" file records are written in the byte order of the host that
writes them, and the reader is expected to fix this up.
PCAP_MAGIC is the magic number, in host byte order; PCAP_SWAPPED_MAGIC
is a byte-swapped version of that.
PCAP_NSEC_MAGIC is for Ulf Lamping's modified "libpcap" format,
which uses the same common file format as PCAP_MAGIC, but the
timestamps are saved in nanosecond resolution instead of microseconds.
PCAP_SWAPPED_NSEC_MAGIC is a byte-swapped version of that. */
#define PCAP_MAGIC 0xa1b2c3d4
#define PCAP_SWAPPED_MAGIC 0xd4c3b2a1
#define PCAP_NSEC_MAGIC 0xa1b23c4d
#define PCAP_SWAPPED_NSEC_MAGIC 0x4d3cb2a1
/* "libpcap" file header. */
struct pcap_hdr {
guint32 magic; /* magic number */
guint16 version_major; /* major version number */
guint16 version_minor; /* minor version number */
gint32 thiszone; /* GMT to local correction */
guint32 sigfigs; /* accuracy of timestamps */
guint32 snaplen; /* max length of captured packets, in octets */
guint32 network; /* data link type */
};
/* "libpcap" record header. */
struct pcaprec_hdr {
guint32 ts_sec; /* timestamp seconds */
guint32 ts_usec; /* timestamp microseconds (nsecs for PCAP_NSEC_MAGIC) */
guint32 incl_len; /* number of octets of packet saved in file */
guint32 orig_len; /* actual length of packet */
};
/* Magic numbers in ".pcapng" files.
*
* .pcapng file records are written in the byte order of the host that
* writes them, and the reader is expected to fix this up.
* PCAPNG_MAGIC is the magic number, in host byte order;
* PCAPNG_SWAPPED_MAGIC is a byte-swapped version of that.
*/
#define PCAPNG_MAGIC 0x1A2B3C4D
#define PCAPNG_SWAPPED_MAGIC 0xD4C3B2A1
/* Currently we are only supporting the initial version of
the file format. */
#define PCAPNG_MAJOR_VERSION 1
#define PCAPNG_MINOR_VERSION 0
/* Section Header Block without options and trailing Block Total Length */
struct shb {
guint32 block_type;
guint32 block_total_length;
guint32 byte_order_magic;
guint16 major_version;
guint16 minor_version;
guint64 section_length;
};
#define SECTION_HEADER_BLOCK_TYPE 0x0A0D0D0A
/* Interface Description Block without options and trailing Block Total Length */
struct idb {
guint32 block_type;
guint32 block_total_length;
guint16 link_type;
guint16 reserved;
guint32 snap_len;
};
#define INTERFACE_DESCRIPTION_BLOCK_TYPE 0x00000001
/* Interface Statistics Block without actual packet, options, and trailing
Block Total Length */
struct isb {
guint32 block_type;
guint32 block_total_length;
guint32 interface_id;
guint32 timestamp_high;
guint32 timestamp_low;
};
#define INTERFACE_STATISTICS_BLOCK_TYPE 0x00000005
/* Enhanced Packet Block without actual packet, options, and trailing
Block Total Length */
struct epb {
guint32 block_type;
guint32 block_total_length;
guint32 interface_id;
guint32 timestamp_high;
guint32 timestamp_low;
guint32 captured_len;
guint32 packet_len;
};
#define ENHANCED_PACKET_BLOCK_TYPE 0x00000006
struct option {
guint16 type;
guint16 value_length;
};
#define OPT_ENDOFOPT 0
#define OPT_COMMENT 1
#define EPB_FLAGS 2
#define SHB_HARDWARE 2 /* currently not used */
#define SHB_OS 3
#define SHB_USERAPPL 4
#define IDB_NAME 2
#define IDB_DESCRIPTION 3
#define IDB_IF_SPEED 8
#define IDB_TSRESOL 9
#define IDB_FILTER 11
#define IDB_OS 12
#define ISB_STARTTIME 2
#define ISB_ENDTIME 3
#define ISB_IFRECV 4
#define ISB_IFDROP 5
#define ISB_FILTERACCEPT 6
#define ISB_OSDROP 7
#define ISB_USRDELIV 8
#define ADD_PADDING(x) ((((x) + 3) >> 2) << 2)
/* Write to capture file */
static gboolean
write_to_file(FILE* pfile, const guint8* data, size_t data_length,
guint64 *bytes_written, int *err)
{
size_t nwritten;
nwritten = fwrite(data, data_length, 1, pfile);
if (nwritten != 1) {
if (ferror(pfile)) {
*err = errno;
} else {
*err = 0;
}
return FALSE;
}
(*bytes_written) += data_length;
return TRUE;
}
/* Writing pcap files */
/* Write the file header to a dump file.
Returns TRUE on success, FALSE on failure.
Sets "*err" to an error code, or 0 for a short write, on failure*/
gboolean
libpcap_write_file_header(FILE* pfile, int linktype, int snaplen, gboolean ts_nsecs, guint64 *bytes_written, int *err)
{
struct pcap_hdr file_hdr;
file_hdr.magic = ts_nsecs ? PCAP_NSEC_MAGIC : PCAP_MAGIC;
/* current "libpcap" format is 2.4 */
file_hdr.version_major = 2;
file_hdr.version_minor = 4;
file_hdr.thiszone = 0; /* XXX - current offset? */
file_hdr.sigfigs = 0; /* unknown, but also apparently unused */
file_hdr.snaplen = snaplen;
file_hdr.network = linktype;
return write_to_file(pfile, (const guint8*)&file_hdr, sizeof(file_hdr), bytes_written, err);
}
/* Write a record for a packet to a dump file.
Returns TRUE on success, FALSE on failure. */
gboolean
libpcap_write_packet(FILE* pfile,
time_t sec, guint32 usec,
guint32 caplen, guint32 len,
const guint8 *pd,
guint64 *bytes_written, int *err)
{
struct pcaprec_hdr rec_hdr;
rec_hdr.ts_sec = (guint32)sec; /* Y2.038K issue in pcap format.... */
rec_hdr.ts_usec = usec;
rec_hdr.incl_len = caplen;
rec_hdr.orig_len = len;
if (!write_to_file(pfile, (const guint8*)&rec_hdr, sizeof(rec_hdr), bytes_written, err))
return FALSE;
return write_to_file(pfile, pd, caplen, bytes_written, err);
}
/* Writing pcap-ng files */
static guint32
pcapng_count_string_option(const char *option_value)
{
if ((option_value != NULL) && (strlen(option_value) > 0) && (strlen(option_value) < G_MAXUINT16)) {
/* There's a value to write; get its length */
return (guint32)(sizeof(struct option) +
(guint16)ADD_PADDING(strlen(option_value)));
}
return 0; /* nothing to write */
}
static gboolean
pcapng_write_string_option(FILE* pfile,
guint16 option_type, const char *option_value,
guint64 *bytes_written, int *err)
{
size_t option_value_length;
struct option option;
const guint32 padding = 0;
if (option_value == NULL)
return TRUE; /* nothing to write */
option_value_length = strlen(option_value);
if ((option_value_length > 0) && (option_value_length < G_MAXUINT16)) {
/* something to write */
option.type = option_type;
option.value_length = (guint16)option_value_length;
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)option_value, (int) option_value_length, bytes_written, err))
return FALSE;
if (option_value_length % 4) {
if (!write_to_file(pfile, (const guint8*)&padding, 4 - option_value_length % 4, bytes_written, err))
return FALSE;
}
}
return TRUE;
}
gboolean
pcapng_write_session_header_block(FILE* pfile,
const char *comment,
const char *hw,
const char *os,
const char *appname,
guint64 section_length,
guint64 *bytes_written,
int *err)
{
struct shb shb;
struct option option;
guint32 block_total_length;
guint32 options_length;
/* Size of base header */
block_total_length = sizeof(struct shb) +
sizeof(guint32);
options_length = 0;
options_length += pcapng_count_string_option(comment);
options_length += pcapng_count_string_option(hw);
options_length += pcapng_count_string_option(os);
options_length += pcapng_count_string_option(appname);
/* If we have options add size of end-of-options */
if (options_length != 0) {
options_length += (guint32)sizeof(struct option);
}
block_total_length += options_length;
/* write shb header */
shb.block_type = SECTION_HEADER_BLOCK_TYPE;
shb.block_total_length = block_total_length;
shb.byte_order_magic = PCAPNG_MAGIC;
shb.major_version = PCAPNG_MAJOR_VERSION;
shb.minor_version = PCAPNG_MINOR_VERSION;
shb.section_length = section_length;
if (!write_to_file(pfile, (const guint8*)&shb, sizeof(struct shb), bytes_written, err))
return FALSE;
if (!pcapng_write_string_option(pfile, OPT_COMMENT, comment,
bytes_written, err))
return FALSE;
if (!pcapng_write_string_option(pfile, SHB_HARDWARE, hw,
bytes_written, err))
return FALSE;
if (!pcapng_write_string_option(pfile, SHB_OS, os,
bytes_written, err))
return FALSE;
if (!pcapng_write_string_option(pfile, SHB_USERAPPL, appname,
bytes_written, err))
return FALSE;
if (options_length != 0) {
/* write end of options */
option.type = OPT_ENDOFOPT;
option.value_length = 0;
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
}
/* write the trailing block total length */
return write_to_file(pfile, (const guint8*)&block_total_length, sizeof(guint32), bytes_written, err);
}
gboolean
pcapng_write_interface_description_block(FILE* pfile,
const char *comment, /* OPT_COMMENT 1 */
const char *name, /* IDB_NAME 2 */
const char *descr, /* IDB_DESCRIPTION 3 */
const char *filter, /* IDB_FILTER 11 */
const char *os, /* IDB_OS 12 */
int link_type,
int snap_len,
guint64 *bytes_written,
guint64 if_speed, /* IDB_IF_SPEED 8 */
guint8 tsresol, /* IDB_TSRESOL 9 */
int *err)
{
struct idb idb;
struct option option;
guint32 block_total_length;
guint32 options_length;
const guint32 padding = 0;
block_total_length = (guint32)(sizeof(struct idb) + sizeof(guint32));
options_length = 0;
/* 01 - OPT_COMMENT */
options_length += pcapng_count_string_option(comment);
/* 02 - IDB_NAME */
options_length += pcapng_count_string_option(name);
/* 03 - IDB_DESCRIPTION */
options_length += pcapng_count_string_option(descr);
/* 08 - IDB_IF_SPEED */
if (if_speed != 0) {
options_length += (guint32)(sizeof(struct option) +
sizeof(guint64));
}
/* 09 - IDB_TSRESOL */
if (tsresol != 0) {
options_length += (guint32)(sizeof(struct option) +
sizeof(struct option));
}
/* 11 - IDB_FILTER */
if ((filter != NULL) && (strlen(filter) > 0) && (strlen(filter) < G_MAXUINT16)) {
/* No, this isn't a string, it has an extra type byte */
options_length += (guint32)(sizeof(struct option) +
(guint16)(ADD_PADDING(strlen(filter)+ 1)));
}
/* 12 - IDB_OS */
options_length += pcapng_count_string_option(os);
/* If we have options add size of end-of-options */
if (options_length != 0) {
options_length += (guint32)sizeof(struct option);
}
block_total_length += options_length;
/* write block header */
idb.block_type = INTERFACE_DESCRIPTION_BLOCK_TYPE;
idb.block_total_length = block_total_length;
idb.link_type = link_type;
idb.reserved = 0;
idb.snap_len = snap_len;
if (!write_to_file(pfile, (const guint8*)&idb, sizeof(struct idb), bytes_written, err))
return FALSE;
/* 01 - OPT_COMMENT - write comment string if applicable */
if (!pcapng_write_string_option(pfile, OPT_COMMENT, comment,
bytes_written, err))
return FALSE;
/* 02 - IDB_NAME - write interface name string if applicable */
if (!pcapng_write_string_option(pfile, IDB_NAME, name,
bytes_written, err))
return FALSE;
/* 03 - IDB_DESCRIPTION */
/* write interface description string if applicable */
if (!pcapng_write_string_option(pfile, IDB_DESCRIPTION, descr,
bytes_written, err))
return FALSE;
/* 08 - IDB_IF_SPEED */
if (if_speed != 0) {
option.type = IDB_IF_SPEED;
option.value_length = sizeof(guint64);
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)&if_speed, sizeof(guint64), bytes_written, err))
return FALSE;
}
/* 09 - IDB_TSRESOL */
if (tsresol != 0) {
option.type = IDB_TSRESOL;
option.value_length = sizeof(guint8);
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)&tsresol, sizeof(guint8), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)&padding, 3, bytes_written, err))
return FALSE;
}
/* 11 - IDB_FILTER - write filter string if applicable
* We only write version 1 of the filter, pcapng string
*/
if ((filter != NULL) && (strlen(filter) > 0) && (strlen(filter) < G_MAXUINT16 - 1)) {
option.type = IDB_FILTER;
option.value_length = (guint16)(strlen(filter) + 1 );
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
/* The first byte of the Option Data keeps a code of the filter used, 0 = lipbpcap filter string */
if (!write_to_file(pfile, (const guint8*)&padding, 1, bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)filter, (int) strlen(filter), bytes_written, err))
return FALSE;
if ((strlen(filter) + 1) % 4) {
if (!write_to_file(pfile, (const guint8*)&padding, 4 - (strlen(filter) + 1) % 4, bytes_written, err))
return FALSE;
}
}
/* 12 - IDB_OS - write os string if applicable */
if (!pcapng_write_string_option(pfile, IDB_OS, os,
bytes_written, err))
return FALSE;
if (options_length != 0) {
/* write end of options */
option.type = OPT_ENDOFOPT;
option.value_length = 0;
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
}
/* write the trailing Block Total Length */
return write_to_file(pfile, (const guint8*)&block_total_length, sizeof(guint32), bytes_written, err);
}
/* Write a record for a packet to a dump file.
Returns TRUE on success, FALSE on failure. */
gboolean
pcapng_write_enhanced_packet_block(FILE* pfile,
const char *comment,
time_t sec, guint32 usec,
guint32 caplen, guint32 len,
guint32 interface_id,
guint ts_mul,
const guint8 *pd,
guint32 flags,
guint64 *bytes_written,
int *err)
{
struct epb epb;
struct option option;
guint32 block_total_length;
guint64 timestamp;
guint32 options_length;
const guint32 padding = 0;
guint8 buff[8];
guint8 i;
guint8 pad_len = 0;
block_total_length = (guint32)(sizeof(struct epb) +
ADD_PADDING(caplen) +
sizeof(guint32));
options_length = 0;
options_length += pcapng_count_string_option(comment);
if (flags != 0) {
options_length += (guint32)(sizeof(struct option) +
sizeof(guint32));
}
/* If we have options add size of end-of-options */
if (options_length != 0) {
options_length += (guint32)sizeof(struct option);
}
block_total_length += options_length;
timestamp = (guint64)sec * ts_mul + (guint64)usec;
epb.block_type = ENHANCED_PACKET_BLOCK_TYPE;
epb.block_total_length = block_total_length;
epb.interface_id = interface_id;
epb.timestamp_high = (guint32)((timestamp>>32) & 0xffffffff);
epb.timestamp_low = (guint32)(timestamp & 0xffffffff);
epb.captured_len = caplen;
epb.packet_len = len;
if (!write_to_file(pfile, (const guint8*)&epb, sizeof(struct epb), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, pd, caplen, bytes_written, err))
return FALSE;
/* Use more efficient write in case of no "extras" */
if(caplen % 4) {
pad_len = 4 - (caplen % 4);
}
if(!comment && flags == 0 && options_length==0){
/* Put padding in the buffer */
for (i = 0; i < pad_len; i++) {
buff[i] = 0;
}
/* Write the total length */
buff[i] = (block_total_length & 0x000000ff);
i++;
buff[i] = (block_total_length & 0x0000ff00) >> 8;
i++;
buff[i] = (block_total_length & 0x00ff0000) >> 16;
i++;
buff[i] = (block_total_length & 0xff000000) >> 24;
i++;
return write_to_file(pfile, (const guint8*)&buff, i, bytes_written, err);
}
if (pad_len) {
if (!write_to_file(pfile, (const guint8*)&padding, pad_len, bytes_written, err))
return FALSE;
}
if (!pcapng_write_string_option(pfile, OPT_COMMENT, comment,
bytes_written, err))
return FALSE;
if (flags != 0) {
option.type = EPB_FLAGS;
option.value_length = sizeof(guint32);
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)&flags, sizeof(guint32), bytes_written, err))
return FALSE;
}
if (options_length != 0) {
/* write end of options */
option.type = OPT_ENDOFOPT;
option.value_length = 0;
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
}
return write_to_file(pfile, (const guint8*)&block_total_length, sizeof(guint32), bytes_written, err);
}
gboolean
pcapng_write_interface_statistics_block(FILE* pfile,
guint32 interface_id,
guint64 *bytes_written,
const char *comment, /* OPT_COMMENT 1 */
guint64 isb_starttime, /* ISB_STARTTIME 2 */
guint64 isb_endtime, /* ISB_ENDTIME 3 */
guint64 isb_ifrecv, /* ISB_IFRECV 4 */
guint64 isb_ifdrop, /* ISB_IFDROP 5 */
int *err)
{
struct isb isb;
#ifdef _WIN32
FILETIME now;
#else
struct timeval now;
#endif
struct option option;
guint32 block_total_length;
guint32 options_length;
guint64 timestamp;
#ifdef _WIN32
/*
* Current time, represented as 100-nanosecond intervals since
* January 1, 1601, 00:00:00 UTC.
*
* I think DWORD might be signed, so cast both parts of "now"
* to guint32 so that the sign bit doesn't get treated specially.
*
* Windows 8 provides GetSystemTimePreciseAsFileTime which we
* might want to use instead.
*/
GetSystemTimeAsFileTime(&now);
timestamp = (((guint64)(guint32)now.dwHighDateTime) << 32) +
(guint32)now.dwLowDateTime;
/*
* Convert to same thing but as 1-microsecond, i.e. 1000-nanosecond,
* intervals.
*/
timestamp /= 10;
/*
* Subtract difference, in microseconds, between January 1, 1601
* 00:00:00 UTC and January 1, 1970, 00:00:00 UTC.
*/
timestamp -= G_GUINT64_CONSTANT(11644473600000000);
#else
/*
* Current time, represented as seconds and microseconds since
* January 1, 1970, 00:00:00 UTC.
*/
gettimeofday(&now, NULL);
/*
* Convert to delta in microseconds.
*/
timestamp = (guint64)(now.tv_sec) * 1000000 +
(guint64)(now.tv_usec);
#endif
block_total_length = (guint32)(sizeof(struct isb) + sizeof(guint32));
options_length = 0;
if (isb_ifrecv != G_MAXUINT64) {
options_length += (guint32)(sizeof(struct option) +
sizeof(guint64));
}
if (isb_ifdrop != G_MAXUINT64) {
options_length += (guint32)(sizeof(struct option) +
sizeof(guint64));
}
/* OPT_COMMENT */
options_length += pcapng_count_string_option(comment);
if (isb_starttime !=0) {
options_length += (guint32)(sizeof(struct option) +
sizeof(guint64)); /* ISB_STARTTIME */
}
if (isb_endtime !=0) {
options_length += (guint32)(sizeof(struct option) +
sizeof(guint64)); /* ISB_ENDTIME */
}
/* If we have options add size of end-of-options */
if (options_length != 0) {
options_length += (guint32)sizeof(struct option);
}
block_total_length += options_length;
isb.block_type = INTERFACE_STATISTICS_BLOCK_TYPE;
isb.block_total_length = block_total_length;
isb.interface_id = interface_id;
isb.timestamp_high = (guint32)((timestamp>>32) & 0xffffffff);
isb.timestamp_low = (guint32)(timestamp & 0xffffffff);
if (!write_to_file(pfile, (const guint8*)&isb, sizeof(struct isb), bytes_written, err))
return FALSE;
/* write comment string if applicable */
if (!pcapng_write_string_option(pfile, OPT_COMMENT, comment,
bytes_written, err))
return FALSE;
if (isb_starttime !=0) {
guint32 high, low;
option.type = ISB_STARTTIME;
option.value_length = sizeof(guint64);
high = (guint32)((isb_starttime>>32) & 0xffffffff);
low = (guint32)(isb_starttime & 0xffffffff);
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)&high, sizeof(guint32), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)&low, sizeof(guint32), bytes_written, err))
return FALSE;
}
if (isb_endtime !=0) {
guint32 high, low;
option.type = ISB_ENDTIME;
option.value_length = sizeof(guint64);
high = (guint32)((isb_endtime>>32) & 0xffffffff);
low = (guint32)(isb_endtime & 0xffffffff);
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)&high, sizeof(guint32), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)&low, sizeof(guint32), bytes_written, err))
return FALSE;
}
if (isb_ifrecv != G_MAXUINT64) {
option.type = ISB_IFRECV;
option.value_length = sizeof(guint64);
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)&isb_ifrecv, sizeof(guint64), bytes_written, err))
return FALSE;
}
if (isb_ifdrop != G_MAXUINT64) {
option.type = ISB_IFDROP;
option.value_length = sizeof(guint64);
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
if (!write_to_file(pfile, (const guint8*)&isb_ifdrop, sizeof(guint64), bytes_written, err))
return FALSE;
}
if (options_length != 0) {
/* write end of options */
option.type = OPT_ENDOFOPT;
option.value_length = 0;
if (!write_to_file(pfile, (const guint8*)&option, sizeof(struct option), bytes_written, err))
return FALSE;
}
return write_to_file(pfile, (const guint8*)&block_total_length, sizeof(guint32), bytes_written, err);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=8 tabstop=8 expandtab:
* :indentSize=8:tabSize=8:noTabs=true:
*/
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