![Guy Harris](/assets/img/avatar_default.png)
system. Just call it "usage()". Also, it doesn't use the "progname" argument - it doesn't need to, it's text2pcap-specific, and it prefers to call it "Text2pcap" anyway (and, besides, argv[0] might well be a pathname). Get rid of that argument. Fix some white space. svn path=/trunk/; revision=17431
1322 lines
42 KiB
C
1322 lines
42 KiB
C
/**-*-C-*-**********************************************************************
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*
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* text2pcap.c
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*
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* Utility to convert an ASCII hexdump into a libpcap-format capture file
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*
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* (c) Copyright 2001 Ashok Narayanan <ashokn@cisco.com>
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*
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* $Id$
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*******************************************************************************/
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/*******************************************************************************
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*
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* This utility reads in an ASCII hexdump of this common format:
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*
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* 00000000 00 E0 1E A7 05 6F 00 10 5A A0 B9 12 08 00 46 00 .....o..Z.....F.
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* 00000010 03 68 00 00 00 00 0A 2E EE 33 0F 19 08 7F 0F 19 .h.......3.....
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* 00000020 03 80 94 04 00 00 10 01 16 A2 0A 00 03 50 00 0C .............P..
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* 00000030 01 01 0F 19 03 80 11 01 1E 61 00 0C 03 01 0F 19 .........a......
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*
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* Each bytestring line consists of an offset, one or more bytes, and
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* text at the end. An offset is defined as a hex string of more than
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* two characters. A byte is defined as a hex string of exactly two
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* characters. The text at the end is ignored, as is any text before
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* the offset. Bytes read from a bytestring line are added to the
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* current packet only if all the following conditions are satisfied:
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*
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* - No text appears between the offset and the bytes (any bytes appearing after
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* such text would be ignored)
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*
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* - The offset must be arithmetically correct, i.e. if the offset is 00000020, then
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* exactly 32 bytes must have been read into this packet before this. If the offset
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* is wrong, the packet is immediately terminated
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*
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* A packet start is signalled by a zero offset.
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*
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* Lines starting with #TEXT2PCAP are directives. These allow the user
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* to embed instructions into the capture file which allows text2pcap
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* to take some actions (e.g. specifying the encapsulation
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* etc.). Currently no directives are implemented.
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*
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* Lines beginning with # which are not directives are ignored as
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* comments. Currently all non-hexdump text is ignored by text2pcap;
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* in the future, text processing may be added, but lines prefixed
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* with '#' will still be ignored.
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*
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* The output is a libpcap packet containing Ethernet frames by
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* default. This program takes options which allow the user to add
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* dummy Ethernet, IP and UDP or TCP headers to the packets in order
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* to allow dumps of L3 or higher protocols to be decoded.
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*
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* Considerable flexibility is built into this code to read hexdumps
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* of slightly different formats. For example, any text prefixing the
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* hexdump line is dropped (including mail forwarding '>'). The offset
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* can be any hex number of four digits or greater.
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*
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* This converter cannot read a single packet greater than 64K. Packet
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* snaplength is automatically set to 64K.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/*
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* Just make sure we include the prototype for strptime as well
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* (needed for glibc 2.2)
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*/
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#define __USE_XOPEN
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#include <time.h>
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#include <glib.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <errno.h>
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#include <assert.h>
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#ifdef NEED_GETOPT_H
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# include "getopt.h"
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#endif
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#ifdef NEED_STRPTIME_H
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# include "strptime.h"
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#endif
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#include "text2pcap.h"
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/*--- Options --------------------------------------------------------------------*/
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/* Debug level */
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static int debug = 0;
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/* Be quiet */
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static int quiet = FALSE;
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/* Dummy Ethernet header */
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static int hdr_ethernet = FALSE;
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static unsigned long hdr_ethernet_proto = 0;
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/* Dummy IP header */
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static int hdr_ip = FALSE;
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static long hdr_ip_proto = 0;
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/* Dummy UDP header */
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static int hdr_udp = FALSE;
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static unsigned long hdr_dest_port = 0;
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static unsigned long hdr_src_port = 0;
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/* Dummy TCP header */
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static int hdr_tcp = FALSE;
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/* Dummy SCTP header */
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static int hdr_sctp = FALSE;
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static unsigned long hdr_sctp_src = 0;
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static unsigned long hdr_sctp_dest = 0;
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static unsigned long hdr_sctp_tag = 0;
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/* Dummy DATA chunk header */
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static int hdr_data_chunk = FALSE;
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static unsigned char hdr_data_chunk_type = 0;
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static unsigned char hdr_data_chunk_bits = 3;
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static unsigned long hdr_data_chunk_tsn = 0;
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static unsigned short hdr_data_chunk_sid = 0;
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static unsigned short hdr_data_chunk_ssn = 0;
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static unsigned long hdr_data_chunk_ppid = 0;
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/*--- Local date -----------------------------------------------------------------*/
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/* This is where we store the packet currently being built */
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#define MAX_PACKET 64000
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static unsigned char packet_buf[MAX_PACKET];
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static unsigned long curr_offset = 0;
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static unsigned long max_offset = MAX_PACKET;
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static unsigned long packet_start = 0;
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static void start_new_packet (void);
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/* This buffer contains strings present before the packet offset 0 */
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#define PACKET_PREAMBLE_MAX_LEN 2048
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static unsigned char packet_preamble[PACKET_PREAMBLE_MAX_LEN+1];
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static int packet_preamble_len = 0;
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/* Number of packets read and written */
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static unsigned long num_packets_read = 0;
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static unsigned long num_packets_written = 0;
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/* Time code of packet, derived from packet_preamble */
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static gint32 ts_sec = 0;
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static guint32 ts_usec = 0;
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static char *ts_fmt = NULL;
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/* Input file */
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static const char *input_filename;
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static FILE *input_file = NULL;
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/* Output file */
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static const char *output_filename;
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static FILE *output_file = NULL;
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/* Offset base to parse */
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static unsigned long offset_base = 16;
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extern FILE *yyin;
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/* ----- State machine -----------------------------------------------------------*/
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/* Current state of parser */
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typedef enum {
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INIT, /* Waiting for start of new packet */
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START_OF_LINE, /* Starting from beginning of line */
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READ_OFFSET, /* Just read the offset */
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READ_BYTE, /* Just read a byte */
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READ_TEXT /* Just read text - ignore until EOL */
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} parser_state_t;
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static parser_state_t state = INIT;
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static const char *state_str[] = {"Init",
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"Start-of-line",
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"Offset",
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"Byte",
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"Text"
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};
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static const char *token_str[] = {"",
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"Byte",
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"Offset",
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"Directive",
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"Text",
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"End-of-line"
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};
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/* ----- Skeleton Packet Headers --------------------------------------------------*/
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typedef struct {
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guint8 dest_addr[6];
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guint8 src_addr[6];
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guint16 l3pid;
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} hdr_ethernet_t;
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static hdr_ethernet_t HDR_ETHERNET = {
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{0x02, 0x02, 0x02, 0x02, 0x02, 0x02},
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{0x01, 0x01, 0x01, 0x01, 0x01, 0x01},
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0};
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typedef struct {
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guint8 ver_hdrlen;
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guint8 dscp;
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guint16 packet_length;
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guint16 identification;
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guint8 flags;
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guint8 fragment;
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guint8 ttl;
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guint8 protocol;
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guint16 hdr_checksum;
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guint32 src_addr;
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guint32 dest_addr;
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} hdr_ip_t;
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static hdr_ip_t HDR_IP = {0x45, 0, 0, 0x3412, 0, 0, 0xff, 0, 0, 0x01010101, 0x02020202};
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static struct { /* pseudo header for checksum calculation */
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guint32 src_addr;
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guint32 dest_addr;
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guint8 zero;
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guint8 protocol;
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guint16 length;
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} pseudoh;
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typedef struct {
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guint16 source_port;
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guint16 dest_port;
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guint16 length;
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guint16 checksum;
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} hdr_udp_t;
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static hdr_udp_t HDR_UDP = {0, 0, 0, 0};
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typedef struct {
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guint16 source_port;
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guint16 dest_port;
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guint32 seq_num;
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guint32 ack_num;
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guint8 hdr_length;
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guint8 flags;
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guint16 window;
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guint16 checksum;
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guint16 urg;
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} hdr_tcp_t;
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static hdr_tcp_t HDR_TCP = {0, 0, 0, 0, 0x50, 0, 0, 0, 0};
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typedef struct {
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guint16 src_port;
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guint16 dest_port;
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guint32 tag;
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guint32 checksum;
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} hdr_sctp_t;
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static hdr_sctp_t HDR_SCTP = {0, 0, 0, 0};
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typedef struct {
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guint8 type;
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guint8 bits;
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guint16 length;
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guint32 tsn;
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guint16 sid;
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guint16 ssn;
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guint32 ppid;
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} hdr_data_chunk_t;
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static hdr_data_chunk_t HDR_DATA_CHUNK = {0, 0, 0, 0, 0, 0, 0};
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static char tempbuf[64];
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/*----------------------------------------------------------------------
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* Stuff for writing a PCap file
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*/
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#define PCAP_MAGIC 0xa1b2c3d4
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/* "libpcap" file header (minus magic number). */
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struct pcap_hdr {
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guint32 magic; /* magic */
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guint16 version_major; /* major version number */
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guint16 version_minor; /* minor version number */
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guint32 thiszone; /* GMT to local correction */
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guint32 sigfigs; /* accuracy of timestamps */
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guint32 snaplen; /* max length of captured packets, in octets */
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guint32 network; /* data link type */
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};
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/* "libpcap" record header. */
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struct pcaprec_hdr {
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gint32 ts_sec; /* timestamp seconds */
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guint32 ts_usec; /* timestamp microseconds */
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guint32 incl_len; /* number of octets of packet saved in file */
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guint32 orig_len; /* actual length of packet */
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};
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/* Link-layer type; see net/bpf.h for details */
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static unsigned long pcap_link_type = 1; /* Default is DLT-EN10MB */
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/*----------------------------------------------------------------------
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* Parse a single hex number
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* Will abort the program if it can't parse the number
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* Pass in TRUE if this is an offset, FALSE if not
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*/
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static unsigned long
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parse_num (const char *str, int offset)
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{
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unsigned long num;
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char *c;
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num = strtoul(str, &c, offset ? offset_base : 16);
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if (c==str) {
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fprintf(stderr, "FATAL ERROR: Bad hex number? [%s]\n", str);
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exit(-1);
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}
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return num;
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}
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/*----------------------------------------------------------------------
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* Write this byte into current packet
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*/
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static void
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write_byte (const char *str)
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{
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unsigned long num;
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num = parse_num(str, FALSE);
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packet_buf[curr_offset] = (unsigned char) num;
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curr_offset ++;
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if (curr_offset >= max_offset) /* packet full */
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start_new_packet();
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}
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/*----------------------------------------------------------------------
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* Remove bytes from the current packet
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*/
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static void
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unwrite_bytes (unsigned long nbytes)
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{
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curr_offset -= nbytes;
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}
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/*----------------------------------------------------------------------
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* Compute one's complement checksum (from RFC1071)
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*/
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static guint16
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in_checksum (void *buf, unsigned long count)
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{
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unsigned long sum = 0;
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guint16 *addr = buf;
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while( count > 1 ) {
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/* This is the inner loop */
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sum += g_ntohs(* (guint16 *) addr);
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addr++;
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count -= 2;
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}
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/* Add left-over byte, if any */
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if( count > 0 )
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sum += g_ntohs(* (guint8 *) addr);
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/* Fold 32-bit sum to 16 bits */
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while (sum>>16)
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sum = (sum & 0xffff) + (sum >> 16);
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return g_htons(~sum);
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}
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/* The CRC32C code is taken from draft-ietf-tsvwg-sctpcsum-01.txt.
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* That code is copyrighted by D. Otis and has been modified.
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*/
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#define CRC32C(c,d) (c=(c>>8)^crc_c[(c^(d))&0xFF])
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static guint32 crc_c[256] =
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{
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0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
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0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
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0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
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0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
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0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
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0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
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0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
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0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
|
||
0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
|
||
0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
|
||
0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
|
||
0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
|
||
0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
|
||
0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
|
||
0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
|
||
0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
|
||
0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
|
||
0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
|
||
0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
|
||
0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
|
||
0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
|
||
0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
|
||
0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
|
||
0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
|
||
0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
|
||
0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
|
||
0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
|
||
0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
|
||
0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
|
||
0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
|
||
0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
|
||
0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
|
||
0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
|
||
0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
|
||
0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
|
||
0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
|
||
0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
|
||
0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
|
||
0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
|
||
0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
|
||
0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
|
||
0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
|
||
0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
|
||
0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
|
||
0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
|
||
0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
|
||
0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
|
||
0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
|
||
0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
|
||
0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
|
||
0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
|
||
0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
|
||
0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
|
||
0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
|
||
0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
|
||
0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
|
||
0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
|
||
0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
|
||
0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
|
||
0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
|
||
0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
|
||
0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
|
||
0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
|
||
0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L,
|
||
};
|
||
|
||
static guint32
|
||
crc32c(const guint8* buf, unsigned int len, guint32 crc32_init)
|
||
{
|
||
unsigned int i;
|
||
guint32 crc32;
|
||
|
||
crc32 = crc32_init;
|
||
for (i = 0; i < len; i++)
|
||
CRC32C(crc32, buf[i]);
|
||
|
||
return ( crc32 );
|
||
}
|
||
|
||
static guint32
|
||
finalize_crc32c(guint32 crc32)
|
||
{
|
||
guint32 result;
|
||
guint8 byte0,byte1,byte2,byte3;
|
||
|
||
result = ~crc32;
|
||
byte0 = result & 0xff;
|
||
byte1 = (result>>8) & 0xff;
|
||
byte2 = (result>>16) & 0xff;
|
||
byte3 = (result>>24) & 0xff;
|
||
result = ((byte0 << 24) | (byte1 << 16) | (byte2 << 8) | byte3);
|
||
return ( result );
|
||
}
|
||
|
||
static unsigned long
|
||
number_of_padding_bytes (unsigned long length)
|
||
{
|
||
unsigned long remainder;
|
||
|
||
remainder = length % 4;
|
||
|
||
if (remainder == 0)
|
||
return 0;
|
||
else
|
||
return 4 - remainder;
|
||
}
|
||
|
||
/*----------------------------------------------------------------------
|
||
* Write current packet out
|
||
*/
|
||
static void
|
||
write_current_packet (void)
|
||
{
|
||
int length = 0;
|
||
int proto_length = 0;
|
||
int ip_length = 0;
|
||
int eth_trailer_length = 0;
|
||
int i, padding_length;
|
||
guint32 u;
|
||
struct pcaprec_hdr ph;
|
||
|
||
if (curr_offset > 0) {
|
||
/* Write the packet */
|
||
|
||
/* Compute packet length */
|
||
length = curr_offset;
|
||
if (hdr_data_chunk) { length += sizeof(HDR_DATA_CHUNK) + number_of_padding_bytes(curr_offset); }
|
||
if (hdr_sctp) { length += sizeof(HDR_SCTP); }
|
||
if (hdr_udp) { length += sizeof(HDR_UDP); proto_length = length; }
|
||
if (hdr_tcp) { length += sizeof(HDR_TCP); proto_length = length; }
|
||
if (hdr_ip) { length += sizeof(HDR_IP); ip_length = length; }
|
||
if (hdr_ethernet) {
|
||
length += sizeof(HDR_ETHERNET);
|
||
/* Pad trailer */
|
||
if (length < 60) {
|
||
eth_trailer_length = 60 - length;
|
||
length = 60;
|
||
}
|
||
}
|
||
|
||
/* Write PCap header */
|
||
ph.ts_sec = ts_sec;
|
||
ph.ts_usec = ts_usec;
|
||
if (ts_fmt == NULL) { ts_usec++; } /* fake packet counter */
|
||
ph.incl_len = length;
|
||
ph.orig_len = length;
|
||
fwrite(&ph, sizeof(ph), 1, output_file);
|
||
|
||
/* Write Ethernet header */
|
||
if (hdr_ethernet) {
|
||
HDR_ETHERNET.l3pid = g_htons(hdr_ethernet_proto);
|
||
fwrite(&HDR_ETHERNET, sizeof(HDR_ETHERNET), 1, output_file);
|
||
}
|
||
|
||
/* Write IP header */
|
||
if (hdr_ip) {
|
||
HDR_IP.packet_length = g_htons(ip_length);
|
||
HDR_IP.protocol = (guint8) hdr_ip_proto;
|
||
HDR_IP.hdr_checksum = 0;
|
||
HDR_IP.hdr_checksum = in_checksum(&HDR_IP, sizeof(HDR_IP));
|
||
fwrite(&HDR_IP, sizeof(HDR_IP), 1, output_file);
|
||
}
|
||
|
||
/* initialize pseudo header for checksum calculation */
|
||
pseudoh.src_addr = HDR_IP.src_addr;
|
||
pseudoh.dest_addr = HDR_IP.dest_addr;
|
||
pseudoh.zero = 0;
|
||
pseudoh.protocol = (guint8) hdr_ip_proto;
|
||
pseudoh.length = g_htons(proto_length);
|
||
|
||
/* Write UDP header */
|
||
if (hdr_udp) {
|
||
HDR_UDP.source_port = g_htons(hdr_src_port);
|
||
HDR_UDP.dest_port = g_htons(hdr_dest_port);
|
||
HDR_UDP.length = g_htons(proto_length);
|
||
|
||
HDR_UDP.checksum = 0;
|
||
u = g_ntohs(in_checksum(&pseudoh, sizeof(pseudoh))) +
|
||
g_ntohs(in_checksum(&HDR_UDP, sizeof(HDR_UDP))) +
|
||
g_ntohs(in_checksum(packet_buf, curr_offset));
|
||
HDR_UDP.checksum = g_htons((u & 0xffff) + (u>>16));
|
||
if (HDR_UDP.checksum == 0) /* differenciate between 'none' and 0 */
|
||
HDR_UDP.checksum = g_htons(1);
|
||
|
||
fwrite(&HDR_UDP, sizeof(HDR_UDP), 1, output_file);
|
||
}
|
||
|
||
/* Write TCP header */
|
||
if (hdr_tcp) {
|
||
HDR_TCP.source_port = g_htons(hdr_src_port);
|
||
HDR_TCP.dest_port = g_htons(hdr_dest_port);
|
||
/* HDR_TCP.seq_num already correct */
|
||
HDR_TCP.window = g_htons(0x2000);
|
||
|
||
HDR_TCP.checksum = 0;
|
||
u = g_ntohs(in_checksum(&pseudoh, sizeof(pseudoh))) +
|
||
g_ntohs(in_checksum(&HDR_TCP, sizeof(HDR_TCP))) +
|
||
g_ntohs(in_checksum(packet_buf, curr_offset));
|
||
HDR_TCP.checksum = g_htons((u & 0xffff) + (u>>16));
|
||
if (HDR_TCP.checksum == 0) /* differenciate between 'none' and 0 */
|
||
HDR_TCP.checksum = g_htons(1);
|
||
|
||
fwrite(&HDR_TCP, sizeof(HDR_TCP), 1, output_file);
|
||
}
|
||
|
||
/* Compute DATA chunk header and append padding */
|
||
if (hdr_data_chunk) {
|
||
HDR_DATA_CHUNK.type = hdr_data_chunk_type;
|
||
HDR_DATA_CHUNK.bits = hdr_data_chunk_bits;
|
||
HDR_DATA_CHUNK.length = g_htons(curr_offset + sizeof(HDR_DATA_CHUNK));
|
||
HDR_DATA_CHUNK.tsn = g_htonl(hdr_data_chunk_tsn);
|
||
HDR_DATA_CHUNK.sid = g_htons(hdr_data_chunk_sid);
|
||
HDR_DATA_CHUNK.ssn = g_htons(hdr_data_chunk_ssn);
|
||
HDR_DATA_CHUNK.ppid = g_htonl(hdr_data_chunk_ppid);
|
||
|
||
padding_length = number_of_padding_bytes(curr_offset);
|
||
for (i=0; i<padding_length; i++)
|
||
write_byte("0");
|
||
}
|
||
|
||
/* Write SCTP header */
|
||
if (hdr_sctp) {
|
||
HDR_SCTP.src_port = g_htons(hdr_sctp_src);
|
||
HDR_SCTP.dest_port = g_htons(hdr_sctp_dest);
|
||
HDR_SCTP.tag = g_htonl(hdr_sctp_tag);
|
||
HDR_SCTP.checksum = g_htonl(0);
|
||
HDR_SCTP.checksum = crc32c((guint8 *)&HDR_SCTP, sizeof(HDR_SCTP), ~0L);
|
||
if (hdr_data_chunk)
|
||
HDR_SCTP.checksum = crc32c((guint8 *)&HDR_DATA_CHUNK, sizeof(HDR_DATA_CHUNK), HDR_SCTP.checksum);
|
||
HDR_SCTP.checksum = g_htonl(finalize_crc32c(crc32c(packet_buf, curr_offset, HDR_SCTP.checksum)));
|
||
|
||
fwrite(&HDR_SCTP, sizeof(HDR_SCTP), 1, output_file);
|
||
}
|
||
|
||
/* Write DATA chunk header */
|
||
if (hdr_data_chunk) {
|
||
fwrite(&HDR_DATA_CHUNK, sizeof(HDR_DATA_CHUNK), 1, output_file);
|
||
}
|
||
/* Write packet */
|
||
fwrite(packet_buf, curr_offset, 1, output_file);
|
||
|
||
/* Write Ethernet trailer */
|
||
if (hdr_ethernet && eth_trailer_length > 0) {
|
||
memset(tempbuf, 0, eth_trailer_length);
|
||
fwrite(tempbuf, eth_trailer_length, 1, output_file);
|
||
}
|
||
|
||
if (!quiet)
|
||
fprintf(stderr, "Wrote packet of %lu bytes at %u\n", curr_offset, g_ntohl(HDR_TCP.seq_num));
|
||
num_packets_written ++;
|
||
}
|
||
|
||
HDR_TCP.seq_num = g_htonl(g_ntohl(HDR_TCP.seq_num) + curr_offset);
|
||
|
||
packet_start += curr_offset;
|
||
curr_offset = 0;
|
||
}
|
||
|
||
/*----------------------------------------------------------------------
|
||
* Write the PCap file header
|
||
*/
|
||
static void
|
||
write_file_header (void)
|
||
{
|
||
struct pcap_hdr fh;
|
||
|
||
fh.magic = PCAP_MAGIC;
|
||
fh.version_major = 2;
|
||
fh.version_minor = 4;
|
||
fh.thiszone = 0;
|
||
fh.sigfigs = 0;
|
||
fh.snaplen = 102400;
|
||
fh.network = pcap_link_type;
|
||
|
||
fwrite(&fh, sizeof(fh), 1, output_file);
|
||
}
|
||
|
||
/*----------------------------------------------------------------------
|
||
* Append a token to the packet preamble.
|
||
*/
|
||
static void
|
||
append_to_preamble(char *str)
|
||
{
|
||
size_t toklen;
|
||
|
||
if (packet_preamble_len != 0) {
|
||
if (packet_preamble_len == PACKET_PREAMBLE_MAX_LEN)
|
||
return; /* no room to add more preamble */
|
||
/* Add a blank separator between the previous token and this token. */
|
||
packet_preamble[packet_preamble_len++] = ' ';
|
||
}
|
||
toklen = strlen(str);
|
||
if (toklen != 0) {
|
||
if (packet_preamble_len + toklen > PACKET_PREAMBLE_MAX_LEN)
|
||
return; /* no room to add the token to the preamble */
|
||
strcpy(&packet_preamble[packet_preamble_len], str);
|
||
packet_preamble_len += toklen;
|
||
}
|
||
}
|
||
|
||
/*----------------------------------------------------------------------
|
||
* Parse the preamble to get the timecode.
|
||
*/
|
||
static void
|
||
parse_preamble (void)
|
||
{
|
||
struct tm timecode;
|
||
char *subsecs;
|
||
char *p;
|
||
int subseclen;
|
||
int i;
|
||
|
||
/*
|
||
* If no "-t" flag was specified, don't attempt to parse a packet
|
||
* preamble to extract a time stamp.
|
||
*/
|
||
if (ts_fmt == NULL)
|
||
return;
|
||
|
||
ts_sec = 0;
|
||
ts_usec = 0;
|
||
|
||
/*
|
||
* Null-terminate the preamble.
|
||
*/
|
||
packet_preamble[packet_preamble_len] = '\0';
|
||
|
||
/* Ensure preamble has more than two chars before atempting to parse.
|
||
* This should cover line breaks etc that get counted.
|
||
*/
|
||
if ( strlen(packet_preamble) > 2 ) {
|
||
/*
|
||
* Initialize to the Epoch, just in case not all fields
|
||
* of the date and time are specified.
|
||
*/
|
||
timecode.tm_sec = 0;
|
||
timecode.tm_min = 0;
|
||
timecode.tm_hour = 0;
|
||
timecode.tm_mday = 1;
|
||
timecode.tm_mon = 0;
|
||
timecode.tm_year = 70;
|
||
timecode.tm_wday = 0;
|
||
timecode.tm_yday = 0;
|
||
timecode.tm_isdst = -1;
|
||
|
||
/* Get Time leaving subseconds */
|
||
subsecs = strptime( packet_preamble, ts_fmt, &timecode );
|
||
if (subsecs != NULL) {
|
||
/* Get the long time from the tm structure */
|
||
ts_sec = (gint32)mktime( &timecode );
|
||
} else
|
||
ts_sec = -1; /* we failed to parse it */
|
||
|
||
/* This will ensure incorrectly parsed dates get set to zero */
|
||
if ( -1 == ts_sec )
|
||
{
|
||
ts_sec = 0;
|
||
ts_usec = 0;
|
||
}
|
||
else
|
||
{
|
||
/* Parse subseconds */
|
||
ts_usec = strtol(subsecs, &p, 10);
|
||
if (subsecs == p) {
|
||
/* Error */
|
||
ts_usec = 0;
|
||
} else {
|
||
/*
|
||
* Convert that number to a number
|
||
* of microseconds; if it's N digits
|
||
* long, it's in units of 10^(-N) seconds,
|
||
* so, to convert it to units of
|
||
* 10^-6 seconds, we multiply by
|
||
* 10^(6-N).
|
||
*/
|
||
subseclen = p - subsecs;
|
||
if (subseclen > 6) {
|
||
/*
|
||
* *More* than 6 digits; 6-N is
|
||
* negative, so we divide by
|
||
* 10^(N-6).
|
||
*/
|
||
for (i = subseclen - 6; i != 0; i--)
|
||
ts_usec /= 10;
|
||
} else if (subseclen < 6) {
|
||
for (i = 6 - subseclen; i != 0; i--)
|
||
ts_usec *= 10;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/*printf("Format(%s), time(%u), subsecs(%u)\n\n", ts_fmt, ts_sec, ts_usec);*/
|
||
|
||
/* Clear Preamble */
|
||
packet_preamble_len = 0;
|
||
}
|
||
|
||
/*----------------------------------------------------------------------
|
||
* Start a new packet
|
||
*/
|
||
static void
|
||
start_new_packet (void)
|
||
{
|
||
if (debug>=1)
|
||
fprintf(stderr, "Start new packet\n");
|
||
|
||
/* Write out the current packet, if required */
|
||
write_current_packet();
|
||
num_packets_read ++;
|
||
|
||
/* Ensure we parse the packet preamble as it may contain the time */
|
||
parse_preamble();
|
||
}
|
||
|
||
/*----------------------------------------------------------------------
|
||
* Process a directive
|
||
*/
|
||
static void
|
||
process_directive (char *str)
|
||
{
|
||
fprintf(stderr, "\n--- Directive [%s] currently unsupported ---\n", str+10);
|
||
|
||
}
|
||
|
||
/*----------------------------------------------------------------------
|
||
* Parse a single token (called from the scanner)
|
||
*/
|
||
void
|
||
parse_token (token_t token, char *str)
|
||
{
|
||
unsigned long num;
|
||
|
||
/*
|
||
* This is implemented as a simple state machine of five states.
|
||
* State transitions are caused by tokens being received from the
|
||
* scanner. The code should be self_documenting.
|
||
*/
|
||
|
||
if (debug>=2) {
|
||
/* Sanitize - remove all '\r' */
|
||
char *c;
|
||
if (str!=NULL) { while ((c = strchr(str, '\r')) != NULL) *c=' '; }
|
||
|
||
fprintf(stderr, "(%s, %s \"%s\") -> (",
|
||
state_str[state], token_str[token], str ? str : "");
|
||
}
|
||
|
||
switch(state) {
|
||
|
||
/* ----- Waiting for new packet -------------------------------------------*/
|
||
case INIT:
|
||
switch(token) {
|
||
case T_TEXT:
|
||
append_to_preamble(str);
|
||
break;
|
||
case T_DIRECTIVE:
|
||
process_directive(str);
|
||
break;
|
||
case T_OFFSET:
|
||
num = parse_num(str, TRUE);
|
||
if (num==0) {
|
||
/* New packet starts here */
|
||
start_new_packet();
|
||
state = READ_OFFSET;
|
||
}
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
break;
|
||
|
||
/* ----- Processing packet, start of new line -----------------------------*/
|
||
case START_OF_LINE:
|
||
switch(token) {
|
||
case T_TEXT:
|
||
append_to_preamble(str);
|
||
break;
|
||
case T_DIRECTIVE:
|
||
process_directive(str);
|
||
break;
|
||
case T_OFFSET:
|
||
num = parse_num(str, TRUE);
|
||
if (num==0) {
|
||
/* New packet starts here */
|
||
start_new_packet();
|
||
packet_start = 0;
|
||
state = READ_OFFSET;
|
||
} else if ((num - packet_start) != curr_offset) {
|
||
/*
|
||
* The offset we read isn't the one we expected.
|
||
* This may only mean that we mistakenly interpreted
|
||
* some text as byte values (e.g., if the text dump
|
||
* of packet data included a number with spaces around
|
||
* it). If the offset is less than what we expected,
|
||
* assume that's the problem, and throw away the putative
|
||
* extra byte values.
|
||
*/
|
||
if (num < curr_offset) {
|
||
unwrite_bytes(curr_offset - num);
|
||
state = READ_OFFSET;
|
||
} else {
|
||
/* Bad offset; switch to INIT state */
|
||
if (debug>=1)
|
||
fprintf(stderr, "Inconsistent offset. Expecting %0lX, got %0lX. Ignoring rest of packet\n",
|
||
curr_offset, num);
|
||
write_current_packet();
|
||
state = INIT;
|
||
}
|
||
} else
|
||
state = READ_OFFSET;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
break;
|
||
|
||
/* ----- Processing packet, read offset -----------------------------------*/
|
||
case READ_OFFSET:
|
||
switch(token) {
|
||
case T_BYTE:
|
||
/* Record the byte */
|
||
state = READ_BYTE;
|
||
write_byte(str);
|
||
break;
|
||
case T_TEXT:
|
||
case T_DIRECTIVE:
|
||
case T_OFFSET:
|
||
state = READ_TEXT;
|
||
break;
|
||
case T_EOL:
|
||
state = START_OF_LINE;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
break;
|
||
|
||
/* ----- Processing packet, read byte -------------------------------------*/
|
||
case READ_BYTE:
|
||
switch(token) {
|
||
case T_BYTE:
|
||
/* Record the byte */
|
||
write_byte(str);
|
||
break;
|
||
case T_TEXT:
|
||
case T_DIRECTIVE:
|
||
case T_OFFSET:
|
||
state = READ_TEXT;
|
||
break;
|
||
case T_EOL:
|
||
state = START_OF_LINE;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
break;
|
||
|
||
/* ----- Processing packet, read text -------------------------------------*/
|
||
case READ_TEXT:
|
||
switch(token) {
|
||
case T_EOL:
|
||
state = START_OF_LINE;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
fprintf(stderr, "FATAL ERROR: Bad state (%d)", state);
|
||
exit(-1);
|
||
}
|
||
|
||
if (debug>=2)
|
||
fprintf(stderr, ", %s)\n", state_str[state]);
|
||
|
||
}
|
||
|
||
/*----------------------------------------------------------------------
|
||
* Print usage string and exit
|
||
*/
|
||
static void
|
||
usage (void)
|
||
{
|
||
fprintf(stderr,
|
||
"Text2pcap %s"
|
||
#ifdef SVNVERSION
|
||
" (" SVNVERSION ")"
|
||
#endif
|
||
"\n"
|
||
"Generate a capture file from an ASCII hexdump of packets.\n"
|
||
"See http://www.ethereal.com for more information.\n"
|
||
"\n"
|
||
"Usage: text2pcap [options] <input-filename> <output-filename>\n"
|
||
"\n"
|
||
"where <input-filename> specifies input filename (use - for standard input)\n"
|
||
" <output-filename> specifies output filename (use - for standard output)\n"
|
||
"\n"
|
||
"Input:\n"
|
||
" -o hex|oct parse offsets as (h)ex or (o)ctal, default is hex\n"
|
||
" -t <timefmt> treats the text before the packet as a date/time code;\n"
|
||
" the specified argument is a format string of the sort \n"
|
||
" supported by strptime.\n"
|
||
" Example: The time \"10:15:14.5476\" has the format code\n"
|
||
" \"%%H:%%M:%%S.\"\n"
|
||
" NOTE: The subsecond component delimiter must be given\n"
|
||
" (.) but no pattern is required; the remaining number\n"
|
||
" is assumed to be fractions of a second.\n"
|
||
"\n"
|
||
"Output:\n"
|
||
" -l <typenum> link-layer type number. Default is 1 (Ethernet). \n"
|
||
" See the file net/bpf.h for list of numbers.\n"
|
||
" -m <max-packet> max packet length in output, default is %d\n"
|
||
"\n"
|
||
"Prepend dummy header:\n"
|
||
" -e <l3pid> prepend dummy Ethernet II header with specified L3PID\n"
|
||
" (in HEX)\n"
|
||
" Example: -e 0x800\n"
|
||
" -i <proto> prepend dummy IP header with specified IP protocol\n"
|
||
" (in DECIMAL). \n"
|
||
" Automatically prepends Ethernet header as well.\n"
|
||
" Example: -i 46\n"
|
||
" -u <srcp>,<destp> prepend dummy UDP header with specified\n"
|
||
" dest and source ports (in DECIMAL).\n"
|
||
" Automatically prepends Ethernet & IP headers as well\n"
|
||
" Example: -u 30,40\n"
|
||
" -T <srcp>,<destp> prepend dummy TCP header with specified \n"
|
||
" dest and source ports (in DECIMAL).\n"
|
||
" Automatically prepends Ethernet & IP headers as well\n"
|
||
" Example: -T 50,60\n"
|
||
" -s <srcp>,<dstp>,<tag> prepend dummy SCTP header with specified \n"
|
||
" dest/source ports and verification tag (in DECIMAL).\n"
|
||
" Automatically prepends Ethernet & IP headers as well\n"
|
||
" Example: -s 30,40,34\n"
|
||
" -S <srcp>,<dstp>,<ppi> prepend dummy SCTP header with specified \n"
|
||
" dest/source ports and verification tag 0. \n"
|
||
" It also prepends a dummy SCTP DATA \n"
|
||
" chunk header with payload protocol identifier ppi.\n"
|
||
" Example: -S 30,40,34\n"
|
||
"\n"
|
||
"Miscellaneous:\n"
|
||
" -h display this help and exit\n"
|
||
" -d detailed debug of parser states \n"
|
||
" -q generate no output at all (automatically turns off -d)\n"
|
||
"",
|
||
VERSION, MAX_PACKET);
|
||
|
||
exit(-1);
|
||
}
|
||
|
||
/*----------------------------------------------------------------------
|
||
* Parse CLI options
|
||
*/
|
||
static void
|
||
parse_options (int argc, char *argv[])
|
||
{
|
||
int c;
|
||
char *p;
|
||
|
||
/* Scan CLI parameters */
|
||
while ((c = getopt(argc, argv, "dhqe:i:l:m:o:u:s:S:t:T:")) != -1) {
|
||
switch(c) {
|
||
case '?': usage(); break;
|
||
case 'h': usage(); break;
|
||
case 'd': if (!quiet) debug++; break;
|
||
case 'q': quiet = TRUE; debug = FALSE; break;
|
||
case 'l': pcap_link_type = strtol(optarg, NULL, 0); break;
|
||
case 'm': max_offset = strtol(optarg, NULL, 0); break;
|
||
case 'o':
|
||
if (optarg[0]!='h' && optarg[0] != 'o') {
|
||
fprintf(stderr, "Bad argument for '-e': %s\n", optarg);
|
||
usage();
|
||
}
|
||
offset_base = (optarg[0]=='o') ? 8 : 16;
|
||
break;
|
||
case 'e':
|
||
hdr_ethernet = TRUE;
|
||
if (sscanf(optarg, "%lx", &hdr_ethernet_proto) < 1) {
|
||
fprintf(stderr, "Bad argument for '-e': %s\n", optarg);
|
||
usage();
|
||
}
|
||
break;
|
||
|
||
case 'i':
|
||
hdr_ip = TRUE;
|
||
hdr_ip_proto = strtol(optarg, &p, 10);
|
||
if (p == optarg || *p != '\0' || hdr_ip_proto < 0 ||
|
||
hdr_ip_proto > 255) {
|
||
fprintf(stderr, "Bad argument for '-i': %s\n", optarg);
|
||
usage();
|
||
}
|
||
hdr_ethernet = TRUE;
|
||
hdr_ethernet_proto = 0x800;
|
||
break;
|
||
|
||
case 's':
|
||
hdr_sctp = TRUE;
|
||
hdr_sctp_src = strtol(optarg, &p, 10);
|
||
if (p == optarg || (*p != ',' && *p != '\0')) {
|
||
fprintf(stderr, "Bad src port for '-%c'\n", c);
|
||
usage();
|
||
}
|
||
if (*p == '\0') {
|
||
fprintf(stderr, "No dest port specified for '-%c'\n", c);
|
||
usage();
|
||
}
|
||
p++;
|
||
optarg = p;
|
||
hdr_sctp_dest = strtol(optarg, &p, 10);
|
||
if (p == optarg || (*p != ',' && *p != '\0')) {
|
||
fprintf(stderr, "Bad dest port for '-s'\n");
|
||
usage();
|
||
}
|
||
if (*p == '\0') {
|
||
fprintf(stderr, "No tag specified for '-%c'\n", c);
|
||
usage();
|
||
}
|
||
p++;
|
||
optarg = p;
|
||
hdr_sctp_tag = strtol(optarg, &p, 10);
|
||
if (p == optarg || *p != '\0') {
|
||
fprintf(stderr, "Bad tag for '-%c'\n", c);
|
||
usage();
|
||
}
|
||
|
||
hdr_ip = TRUE;
|
||
hdr_ip_proto = 132;
|
||
hdr_ethernet = TRUE;
|
||
hdr_ethernet_proto = 0x800;
|
||
break;
|
||
case 'S':
|
||
hdr_sctp = TRUE;
|
||
hdr_data_chunk = TRUE;
|
||
hdr_sctp_src = strtol(optarg, &p, 10);
|
||
if (p == optarg || (*p != ',' && *p != '\0')) {
|
||
fprintf(stderr, "Bad src port for '-%c'\n", c);
|
||
usage();
|
||
}
|
||
if (*p == '\0') {
|
||
fprintf(stderr, "No dest port specified for '-%c'\n", c);
|
||
usage();
|
||
}
|
||
p++;
|
||
optarg = p;
|
||
hdr_sctp_dest = strtol(optarg, &p, 10);
|
||
if (p == optarg || (*p != ',' && *p != '\0')) {
|
||
fprintf(stderr, "Bad dest port for '-s'\n");
|
||
usage();
|
||
}
|
||
if (*p == '\0') {
|
||
fprintf(stderr, "No ppi specified for '-%c'\n", c);
|
||
usage();
|
||
}
|
||
p++;
|
||
optarg = p;
|
||
hdr_data_chunk_ppid = strtoul(optarg, &p, 10);
|
||
if (p == optarg || *p != '\0') {
|
||
fprintf(stderr, "Bad ppi for '-%c'\n", c);
|
||
usage();
|
||
}
|
||
|
||
hdr_ip = TRUE;
|
||
hdr_ip_proto = 132;
|
||
hdr_ethernet = TRUE;
|
||
hdr_ethernet_proto = 0x800;
|
||
break;
|
||
|
||
case 't':
|
||
ts_fmt = optarg;
|
||
break;
|
||
|
||
case 'u':
|
||
hdr_udp = TRUE;
|
||
hdr_tcp = FALSE;
|
||
hdr_src_port = strtol(optarg, &p, 10);
|
||
if (p == optarg || (*p != ',' && *p != '\0')) {
|
||
fprintf(stderr, "Bad src port for '-u'\n");
|
||
usage();
|
||
}
|
||
if (*p == '\0') {
|
||
fprintf(stderr, "No dest port specified for '-u'\n");
|
||
usage();
|
||
}
|
||
p++;
|
||
optarg = p;
|
||
hdr_dest_port = strtol(optarg, &p, 10);
|
||
if (p == optarg || *p != '\0') {
|
||
fprintf(stderr, "Bad dest port for '-u'\n");
|
||
usage();
|
||
}
|
||
hdr_ip = TRUE;
|
||
hdr_ip_proto = 17;
|
||
hdr_ethernet = TRUE;
|
||
hdr_ethernet_proto = 0x800;
|
||
break;
|
||
|
||
case 'T':
|
||
hdr_tcp = TRUE;
|
||
hdr_udp = FALSE;
|
||
hdr_src_port = strtol(optarg, &p, 10);
|
||
if (p == optarg || (*p != ',' && *p != '\0')) {
|
||
fprintf(stderr, "Bad src port for '-T'\n");
|
||
usage();
|
||
}
|
||
if (*p == '\0') {
|
||
fprintf(stderr, "No dest port specified for '-u'\n");
|
||
usage();
|
||
}
|
||
p++;
|
||
optarg = p;
|
||
hdr_dest_port = strtol(optarg, &p, 10);
|
||
if (p == optarg || *p != '\0') {
|
||
fprintf(stderr, "Bad dest port for '-T'\n");
|
||
usage();
|
||
}
|
||
hdr_ip = TRUE;
|
||
hdr_ip_proto = 6;
|
||
hdr_ethernet = TRUE;
|
||
hdr_ethernet_proto = 0x800;
|
||
break;
|
||
|
||
default:
|
||
usage();
|
||
}
|
||
}
|
||
|
||
if (optind >= argc || argc-optind < 2) {
|
||
fprintf(stderr, "Must specify input and output filename\n");
|
||
usage();
|
||
}
|
||
|
||
if (strcmp(argv[optind], "-")) {
|
||
input_filename = strdup(argv[optind]);
|
||
input_file = fopen(input_filename, "rb");
|
||
if (!input_file) {
|
||
fprintf(stderr, "Cannot open file [%s] for reading: %s\n",
|
||
input_filename, strerror(errno));
|
||
exit(-1);
|
||
}
|
||
} else {
|
||
input_filename = "Standard input";
|
||
input_file = stdin;
|
||
}
|
||
|
||
if (strcmp(argv[optind+1], "-")) {
|
||
output_filename = strdup(argv[optind+1]);
|
||
output_file = fopen(output_filename, "wb");
|
||
if (!output_file) {
|
||
fprintf(stderr, "Cannot open file [%s] for writing: %s\n",
|
||
output_filename, strerror(errno));
|
||
exit(-1);
|
||
}
|
||
} else {
|
||
output_filename = "Standard output";
|
||
output_file = stdout;
|
||
}
|
||
|
||
/* Some validation */
|
||
if (pcap_link_type != 1 && hdr_ethernet) {
|
||
fprintf(stderr, "Dummy headers (-e, -i, -u, -s, -S -T) cannot be specified with link type override (-l)\n");
|
||
exit(-1);
|
||
}
|
||
|
||
/* Set up our variables */
|
||
if (!input_file) {
|
||
input_file = stdin;
|
||
input_filename = "Standard input";
|
||
}
|
||
if (!output_file) {
|
||
output_file = stdout;
|
||
output_filename = "Standard output";
|
||
}
|
||
|
||
ts_sec = time(0); /* initialize to current time */
|
||
|
||
/* Display summary of our state */
|
||
if (!quiet) {
|
||
fprintf(stderr, "Input from: %s\n", input_filename);
|
||
fprintf(stderr, "Output to: %s\n", output_filename);
|
||
|
||
if (hdr_ethernet) fprintf(stderr, "Generate dummy Ethernet header: Protocol: 0x%0lX\n",
|
||
hdr_ethernet_proto);
|
||
if (hdr_ip) fprintf(stderr, "Generate dummy IP header: Protocol: %ld\n",
|
||
hdr_ip_proto);
|
||
if (hdr_udp) fprintf(stderr, "Generate dummy UDP header: Source port: %ld. Dest port: %ld\n",
|
||
hdr_src_port, hdr_dest_port);
|
||
if (hdr_tcp) fprintf(stderr, "Generate dummy TCP header: Source port: %ld. Dest port: %ld\n",
|
||
hdr_src_port, hdr_dest_port);
|
||
if (hdr_sctp) fprintf(stderr, "Generate dummy SCTP header: Source port: %ld. Dest port: %ld. Tag: %ld\n",
|
||
hdr_sctp_src, hdr_sctp_dest, hdr_sctp_tag);
|
||
if (hdr_data_chunk) fprintf(stderr, "Generate dummy DATA chunk header: TSN: %lu. SID: %d. SSN: %d. PPID: %lu\n",
|
||
hdr_data_chunk_tsn, hdr_data_chunk_sid, hdr_data_chunk_ssn, hdr_data_chunk_ppid);
|
||
}
|
||
}
|
||
|
||
int main(int argc, char *argv[])
|
||
{
|
||
parse_options(argc, argv);
|
||
|
||
assert(input_file != NULL);
|
||
assert(output_file != NULL);
|
||
|
||
write_file_header();
|
||
|
||
yyin = input_file;
|
||
yylex();
|
||
|
||
write_current_packet();
|
||
if (debug)
|
||
fprintf(stderr, "\n-------------------------\n");
|
||
if (!quiet) {
|
||
fprintf(stderr, "Read %ld potential packets, wrote %ld packets\n",
|
||
num_packets_read, num_packets_written);
|
||
}
|
||
return 0;
|
||
}
|