forked from osmocom/wireshark
Added 'text2pcap', a utility to convert text hexdumps into pcap
files. See text2pcap.1 (built from doc/text2pcap.pod) for details. Changed 'tethereal -x' output to match hex dump format of text2pcap, Ethereal and others. svn path=/trunk/; revision=3421
This commit is contained in:
Ashok Narayanan
parent
5aafaef6c2
commit
2914e81177
17
Makefile.am
17
Makefile.am
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@ -1,7 +1,7 @@
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# Makefile.am
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# Automake file for Ethereal
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#
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# $Id: Makefile.am,v 1.317 2001/05/11 00:39:57 guy Exp $
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# $Id: Makefile.am,v 1.318 2001/05/16 21:32:04 ashokn Exp $
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#
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# Ethereal - Network traffic analyzer
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# By Gerald Combs <gerald@zing.org>
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@ -61,11 +61,11 @@ ACLOCAL_AMFLAGS = `./aclocal-flags`
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# automake will arrange that the Makefile define it as the union of all
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# the "man{section}_MANS" variables.
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#
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bin_PROGRAMS = @ethereal_bin@ @editcap_bin@ @tethereal_bin@ @dftest_bin@ @randpkt_bin@
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bin_PROGRAMS = @ethereal_bin@ @editcap_bin@ @tethereal_bin@ @dftest_bin@ @randpkt_bin@ @text2pcap_bin@
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man1_MANS = @ethereal_man@ @editcap_man@ @tethereal_man@
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man_MANS =
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EXTRA_PROGRAMS = ethereal ethereal_static tethereal tethereal_static editcap dftest
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EXTRA_PROGRAMS = ethereal ethereal_static tethereal tethereal_static editcap dftest text2pcap
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sysconf_DATA = manuf
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@ -519,6 +519,9 @@ tethereal_static_LDADD = wiretap/libwiretap.a \
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tethereal_LDFLAGS = -export-dynamic
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tethereal_static_LDFLAGS = -Wl,-static
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text2pcap_SOURCES = text2pcap.c text2pcap-scanner.l
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text2pcap_DEPENDENCIES = text2pcap.h
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editcap_SOURCES = editcap.c
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# This is the automake dependency variable for the executable
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@ -631,10 +634,14 @@ EXTRA_DIST = \
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doc/README.tvbuff \
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doc/dfilter2pod.pl \
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doc/editcap.pod \
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doc/text2pcap.pod \
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doc/ethereal.pod.template \
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doc/randpkt.txt \
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doc/tethereal.pod.template \
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editcap.c \
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text2pcap.c \
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text2pcap.h \
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text2pcap-scanner.l \
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getopt.c \
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getopt.h \
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ieee-float.h \
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@ -711,6 +718,10 @@ editcap.1: doc/editcap.pod
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(cd doc ; \
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$(MAKE) ../editcap.1 )
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text2pcap.1: doc/text2pcap.pod
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(cd doc ; \
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$(MAKE) ../text2pcap.1 )
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packet-ncp2222.c : ncp2222.py
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$(PYTHON) $(srcdir)/ncp2222.py > $@
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19
configure.in
19
configure.in
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@ -1,4 +1,4 @@
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# $Id: configure.in,v 1.124 2001/05/16 16:17:50 jfoster Exp $
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# $Id: configure.in,v 1.125 2001/05/16 21:32:04 ashokn Exp $
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dnl
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dnl Process this file with autoconf 2.13 or later to produce a
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dnl configure script; 2.12 doesn't generate a "configure" script that
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@ -272,6 +272,22 @@ AC_SUBST(editcap_bin)
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AC_SUBST(editcap_man)
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# Enable/disable text2pcap
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AC_ARG_ENABLE(text2pcap,
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[ --enable-text2pcap build text2pcap. [default=yes]],,enable_text2pcap=yes)
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if test "x$enable_text2pcap" = "xyes" ; then
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text2pcap_bin="text2pcap"
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text2pcap_man="text2pcap.1"
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else
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text2pcap_bin=""
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text2pcap_man=""
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fi
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AC_SUBST(text2pcap_bin)
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AC_SUBST(text2pcap_man)
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# Enable/disable dftest
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AC_ARG_ENABLE(dftest,
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@ -589,6 +605,7 @@ echo "The Ethereal package has been configured with the following options."
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echo " Build ethereal : $enable_ethereal"
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echo " Build tethereal : $enable_tethereal"
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echo " Build editcap : $enable_editcap"
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echo " Build text2pcap : $enable_text2pcap"
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echo " Build randpkt : $enable_randpkt"
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echo " Build dftest : $enable_dftest"
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echo ""
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@ -1,7 +1,7 @@
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# Makefile.am
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# Automake file for Ethereal documentation
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#
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# $Id: Makefile.am,v 1.9 2001/03/06 18:38:47 gram Exp $
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# $Id: Makefile.am,v 1.10 2001/05/16 21:32:05 ashokn Exp $
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#
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# Ethereal - Network traffic analyzer
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# By Gerald Combs <gerald@zing.org>
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@ -48,3 +48,9 @@ tethereal.pod: tethereal.pod.template ../tethereal
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--center="The Ethereal Network Analyzer" \
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--release=$(VERSION) \
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> ../editcap.1
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../text2pcap.1: text2pcap.pod ../config.h
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pod2man $(srcdir)/text2pcap.pod \
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--center="The Ethereal Network Analyzer" \
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--release=$(VERSION) \
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> ../text2pcap.1
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@ -0,0 +1,141 @@
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=head1 NAME
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Text2pcap - Generate a capture file from an ASCII hexdump of packets
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=head1 SYNOPSYS
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B<text2pcap>
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S<[ B<-d> ]>
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S<[ B<-q> ]>
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S<[ B<-o> hex|oct ]>
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S<[ B<-l> typenum ]>
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S<[ B<-e> l3pid ]>
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S<[ B<-i> proto]>
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S<[ B<-u> srcport destport]>
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I<infile>
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I<outfile>
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=head1 DESCRIPTION
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B<Text2pcap> is a program that reads in an ASCII hex dump and writes
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the data described into a B<libpcap>-style capture file. B<text2pcap>
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can read hexdumps with multiple packets in them, and build a capture
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file of multiple packets. B<text2pcap> is also capable of generating
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dummy Ethernet, IP and UDP headers, in order to build fully
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processable packet dumps from hexdumps of application-level data
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only.
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B<Text2pcap> understands a hexdump of the form generated by I<od -t
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x1>. In other words, each byte is individually displayed and
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surrounded with a space. Each line begins with an offset describing
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the position in the file. The offset is a hex number (can also be
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octal - see B<-o>), of more than two hex digits. Here is a sample dump
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that B<text2pcap> can recognize:
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000000 00 e0 1e a7 05 6f 00 10 ........
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000008 5a a0 b9 12 08 00 46 00 ........
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000010 03 68 00 00 00 00 0a 2e ........
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000018 ee 33 0f 19 08 7f 0f 19 ........
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000020 03 80 94 04 00 00 10 01 ........
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000028 16 a2 0a 00 03 50 00 0c ........
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000030 01 01 0f 19 03 80 11 01 ........
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There is no limit on the width or number of bytes per line. Also the
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text dump at the end of the line is ignored. Bytes/hex numbers can be
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uppercase or lowercase. Any text before the offset is ignored,
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including email forwarding characters '>'. Any lines of text between
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the bytestring lines is ignored. The offsets are used to track the
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bytes, so offsets must be correct. Any line which has only bytes
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without a leading offset is ignored. An offset is recognized as being
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a hex number longer than two characters. Any text after the bytes is
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ignored (e.g. the character dump). Any hex numbers in this text are
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also ignored. An offset of zero is indicative of starting a new
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packet, so a single text file with a series of hexdumps can be
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converted into a packet capture with multiple packets. Multiple
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packets are read in with timestamps differing by one second each. In
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general, short of these restrictions, B<text2pcap> is pretty liberal
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about reading in hexdumps and has been tested with a variety of
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mangled outputs (including being forwarded through email multiple
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times, with limited line wrap etc.)
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There are a couple of other special features to note. Any line where
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the first non-whitespace character is '#' will be ignored as a
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comment. Any line beginning with #TEXT2PCAP is a directive and options
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can be inserted after this command to be processed by
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B<text2pcap>. Currently there are no directives implemented; in the
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future, these may be used to give more fine grained control on the
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dump and the way it should be processed e.g. timestamps, encapsulation
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type etc.
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B<Text2pcap> also allows the user to read in dumps of
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application-level data, by inserting dummy L2, L3 and L4 headers
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before each packet. The user can elect to insert Ethernet headers,
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Ethernet and IP, or Ethernet, IP and UDP headers before each
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packet. This allows Ethereal or any other full-packet decoder to
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handle these dumps.
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=head1 OPTIONS
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=over 4
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=item -d
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Displays debugging information during the process. Can be used
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multiple times to generate more debugging information.
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=item -q
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Be completely quiet during the process.
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=item -o hex|oct
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Specify the radix for the offsets (hex or octal). Defaults to
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hex. This corresponds to the C<-A> option for I<od>.
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=item -l
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Specify the link-layer type of this packet. Default is Ethernet
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(1). See I<net/bpf.h> for the complete list of possible
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encapsulations. Note that this option should be used if your dump is a
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complete hex dump of an encapsulated packet and you wish to specify
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the exact type of encapsulation. Example: I<-l 7> for ARCNet packets.
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=item -e l3pid
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Include a dummy Ethernet header before each packet. Specify the L3PID
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for the Ethernet header in hex. Use this option if your dump is an IP
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packet with IP header and payload, but no Layer 2
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encapsulation. Example: I<-e 0x806> to specify an ARP packet.
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=item -i proto
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Include dummy IP headers before each packet. Specify the IP protocol
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for the packet in decimal. Use this option if your dump is the payload
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of an IP packet (i.e. has complete L4 information) but does not have
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an IP header. Note that this automatically includes an appropriate
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Ethernet header as well. Example: I<-i 46> to specify an RSVP packet
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(IP protocol 46).
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=item -u srcport destport
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Include dummy UDP headers before each packet. Specify the source and
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destination UDP ports for the packet in decimal. Use this option if
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your dump is the UDP payload of a packet but does not include any UDP,
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IP or Ethernet headers. Note that this automatically includes
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appropriate Ethernet and IP headers with each packet. Example: I<-u
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1000 69> to make the packets look like TFTP/UDP packets.
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=head1 SEE ALSO
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L<tcpdump(8)>, L<pcap(3)>, L<ethereal(1)>, L<editcap(1)>
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=head1 NOTES
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B<Text2pcap> is part of the B<Ethereal> distribution. The latest version
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of B<Ethereal> can be found at B<http://www.ethereal.com>.
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=head1 AUTHORS
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Ashok Narayanan <ashokn@cisco.com>
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12
print.c
12
print.c
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@ -1,7 +1,7 @@
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/* print.c
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* Routines for printing packet analysis trees.
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*
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* $Id: print.c,v 1.32 2001/03/24 23:49:14 guy Exp $
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* $Id: print.c,v 1.33 2001/05/16 21:32:04 ashokn Exp $
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*
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* Gilbert Ramirez <gram@xiexie.org>
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*
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@ -223,7 +223,7 @@ void print_hex_data_text(FILE *fh, register const u_char *cp,
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{
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register int ad, i, j, k;
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u_char c;
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u_char line[60];
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u_char line[80];
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static u_char binhex[16] = {
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
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@ -234,13 +234,13 @@ void print_hex_data_text(FILE *fh, register const u_char *cp,
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c = *cp++;
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line[j++] = binhex[c>>4];
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line[j++] = binhex[c&0xf];
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if (i&1) j++;
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j++;
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if (encoding == CHAR_EBCDIC) {
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c = EBCDIC_to_ASCII1(c);
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}
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line[42+k++] = c >= ' ' && c < 0x7f ? c : '.';
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line[50+k++] = c >= ' ' && c < 0x7f ? c : '.';
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if ((i & 15) == 15) {
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fprintf (fh, "\n%4x %s", ad, line);
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fprintf (fh, "\n%04x %s", ad, line);
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/*if (i==15) printf (" %d", length);*/
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memset (line, ' ', sizeof line);
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line[sizeof (line)-1] = j = k = 0;
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@ -248,7 +248,7 @@ void print_hex_data_text(FILE *fh, register const u_char *cp,
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}
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}
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if (line[0] != ' ') fprintf (fh, "\n%4x %s", ad, line);
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if (line[0] != ' ') fprintf (fh, "\n%04x %s", ad, line);
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fprintf(fh, "\n");
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return;
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@ -0,0 +1,71 @@
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/* -*-mode: flex-*- */
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%{
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/********************************************************************************
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*
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* text2pcap-scanner.l
|
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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: text2pcap-scanner.l,v 1.1 2001/05/16 21:32:04 ashokn Exp $
|
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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
|
||||
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*
|
||||
*******************************************************************************/
|
||||
|
||||
#include <stdio.h>
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||||
#include <stdlib.h>
|
||||
|
||||
#include "text2pcap.h"
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||||
|
||||
%}
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||||
|
||||
hexdigit [0-9A-Fa-f]
|
||||
directive #TEXT2PCAP.*
|
||||
comment #[^W].*
|
||||
byte [0-9A-Fa-f][0-9A-Fa-f][ \t]
|
||||
byte_eol [0-9A-Fa-f][0-9A-Fa-f]\n
|
||||
offset [0-9A-Fa-f]+[ \t\n]
|
||||
text [^ \n\t]+
|
||||
mailfwd >
|
||||
eol \r?\n\r?
|
||||
|
||||
%%
|
||||
|
||||
{byte} { parse_token(T_BYTE, yytext); }
|
||||
{byte_eol} { parse_token(T_BYTE, yytext); parse_token(T_EOL, NULL); }
|
||||
{offset} { parse_token(T_OFFSET, yytext); }
|
||||
{mailfwd}{offset} { parse_token(T_OFFSET, yytext+1); }
|
||||
{eol} { parse_token(T_EOL, NULL); }
|
||||
[ \t] ; /* ignore whitespace */
|
||||
{directive} { parse_token(T_DIRECTIVE, yytext); }
|
||||
{comment} ; /* ignore comments */
|
||||
{text} { parse_token(T_TEXT, yytext); }
|
||||
|
||||
%%
|
||||
|
||||
int yywrap()
|
||||
{
|
||||
return 1;
|
||||
}
|
||||
|
|
@ -0,0 +1,741 @@
|
|||
/**-*-C-*-**********************************************************************
|
||||
*
|
||||
* text2pcap.c
|
||||
*
|
||||
* Utility to convert an ASCII hexdump into a libpcap-format capture file
|
||||
*
|
||||
* (c) Copyright 2001 Ashok Narayanan <ashokn@cisco.com>
|
||||
*
|
||||
* $Id: text2pcap.c,v 1.1 2001/05/16 21:32:04 ashokn Exp $
|
||||
*
|
||||
* Ethereal - Network traffic analyzer
|
||||
* By Gerald Combs <gerald@ethereal.com>
|
||||
* Copyright 1998 Gerald Combs
|
||||
*
|
||||
*
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* of the License, or (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*
|
||||
*******************************************************************************/
|
||||
|
||||
/*******************************************************************************
|
||||
*
|
||||
* This utility reads in an ASCII hexdump of this common format:
|
||||
*
|
||||
* 00000000 00 E0 1E A7 05 6F 00 10 5A A0 B9 12 08 00 46 00 .....o..Z.....F.
|
||||
* 00000010 03 68 00 00 00 00 0A 2E EE 33 0F 19 08 7F 0F 19 .h.......3.....
|
||||
* 00000020 03 80 94 04 00 00 10 01 16 A2 0A 00 03 50 00 0C .............P..
|
||||
* 00000030 01 01 0F 19 03 80 11 01 1E 61 00 0C 03 01 0F 19 .........a......
|
||||
*
|
||||
* Each bytestring line consists of an offset, one or more bytes, and
|
||||
* text at the end. An offset is defined as a hex string of more than
|
||||
* two characters. A byte is defined as a hex string of exactly two
|
||||
* characters. The text at the end is ignored, as is any text before
|
||||
* the offset. Bytes read from a bytestring line are added to the
|
||||
* current packet only if all the following conditions are satisfied:
|
||||
*
|
||||
* - No text appears between the offset and the bytes (any bytes appearing after
|
||||
* such text would be ignored)
|
||||
*
|
||||
* - The offset must be arithmetically correct, i.e. if the offset is 00000020, then
|
||||
* exactly 32 bytes must have been read into this packet before this. If the offset
|
||||
* is wrong, the packet is immediately terminated
|
||||
*
|
||||
* A packet start is signalled by a zero offset.
|
||||
*
|
||||
* Lines starting with #TEXT2PCAP are directives. These allow the user
|
||||
* to embed instructions into the capture file which allows text2pcap
|
||||
* to take some actions (e.g. specifying the encapsulation
|
||||
* etc.). Currently no directives are implemented.
|
||||
*
|
||||
* Lines beginning with # which are not directives are ignored as
|
||||
* comments. Currently all non-hexdump text is ignored by text2pcap;
|
||||
* in the future, text processing may be added, but lines prefixed
|
||||
* with '#' will still be ignored.
|
||||
*
|
||||
* The output is a libpcap packet containing Ethernet frames by
|
||||
* default. This program takes options which allow the user to add
|
||||
* dummy Ethernet, IP and UDP headers to the packets in order to allow
|
||||
* dumps of L3 or higher protocols to be decoded.
|
||||
*
|
||||
* Considerable flexibility is built into this code to read hexdumps
|
||||
* of slightly different formats. For example, any text prefixing the
|
||||
* hexdump line is dropped (including mail forwarding '>'). The offset
|
||||
* can be any hex number of four digits or greater.
|
||||
*
|
||||
* This converter cannot read a single packet greater than 64K. Packet
|
||||
* snaplength is automatically set to 64K.
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <sys/types.h>
|
||||
#include <unistd.h>
|
||||
#include <netinet/in.h>
|
||||
#include <errno.h>
|
||||
#include <assert.h>
|
||||
|
||||
#ifndef TRUE
|
||||
#define TRUE 1
|
||||
#endif
|
||||
|
||||
#ifndef FALSE
|
||||
#define FALSE 0
|
||||
#endif
|
||||
|
||||
#include "text2pcap.h"
|
||||
|
||||
/*--- Options --------------------------------------------------------------------*/
|
||||
|
||||
/* Debug level */
|
||||
int debug = 0;
|
||||
/* Be quiet */
|
||||
int quiet = FALSE;
|
||||
|
||||
/* Dummy Ethernet header */
|
||||
int hdr_ethernet = FALSE;
|
||||
unsigned long hdr_ethernet_proto = 0;
|
||||
|
||||
/* Dummy IP header */
|
||||
int hdr_ip = FALSE;
|
||||
unsigned long hdr_ip_proto = 0;
|
||||
|
||||
/* Dummy UDP header */
|
||||
int hdr_udp = FALSE;
|
||||
unsigned long hdr_udp_dest = 0;
|
||||
unsigned long hdr_udp_src = 0;
|
||||
|
||||
/*--- Local date -----------------------------------------------------------------*/
|
||||
|
||||
/* This is where we store the packet currently being built */
|
||||
#define MAX_PACKET 64000
|
||||
unsigned char packet_buf[MAX_PACKET];
|
||||
unsigned long curr_offset = 0;
|
||||
|
||||
/* Number of packets read and written */
|
||||
unsigned long num_packets_read = 0;
|
||||
unsigned long num_packets_written = 0;
|
||||
|
||||
/* Input file */
|
||||
char *input_filename;
|
||||
FILE *input_file = NULL;
|
||||
/* Output file */
|
||||
char *output_filename;
|
||||
FILE *output_file = NULL;
|
||||
|
||||
/* Offset base to parse */
|
||||
unsigned long offset_base = 16;
|
||||
|
||||
FILE *yyin;
|
||||
|
||||
/* ----- State machine -----------------------------------------------------------*/
|
||||
|
||||
/* Current state of parser */
|
||||
typedef enum {
|
||||
INIT, /* Waiting for start of new packet */
|
||||
START_OF_LINE, /* Starting from beginning of line */
|
||||
OFFSET, /* Just read the offset */
|
||||
BYTE, /* Just read a byte */
|
||||
TEXT, /* Just read text - ignore until EOL */
|
||||
} parser_state_t;
|
||||
parser_state_t state = INIT;
|
||||
|
||||
const char *state_str[] = {"Init",
|
||||
"Start-of-line",
|
||||
"Offset",
|
||||
"Byte",
|
||||
"Text"
|
||||
};
|
||||
|
||||
const char *token_str[] = {"",
|
||||
"Byte",
|
||||
"Offset",
|
||||
"Directive",
|
||||
"Text",
|
||||
"End-of-line"
|
||||
};
|
||||
|
||||
/* ----- Skeleton Packet Headers --------------------------------------------------*/
|
||||
|
||||
typedef struct {
|
||||
unsigned char src_addr[6];
|
||||
unsigned char dest_addr[6];
|
||||
unsigned short l3pid;
|
||||
} hdr_ethernet_t;
|
||||
|
||||
hdr_ethernet_t HDR_ETHERNET = {
|
||||
{0x01, 0x01, 0x01, 0x01, 0x01, 0x01},
|
||||
{0x02, 0x02, 0x02, 0x02, 0x02, 0x02},
|
||||
0};
|
||||
|
||||
typedef struct {
|
||||
unsigned char ver_hdrlen;
|
||||
unsigned char dscp;
|
||||
unsigned short packet_length;
|
||||
unsigned short identification;
|
||||
unsigned char flags;
|
||||
unsigned char fragment;
|
||||
unsigned char ttl;
|
||||
unsigned char protocol;
|
||||
unsigned short hdr_checksum;
|
||||
unsigned long src_addr;
|
||||
unsigned long dest_addr;
|
||||
} hdr_ip_t;
|
||||
|
||||
hdr_ip_t HDR_IP = {0x45, 0, 0, 0x3412, 0, 0, 0xff, 0, 0, 0x01010101, 0x02020202};
|
||||
|
||||
typedef struct {
|
||||
unsigned short source_port;
|
||||
unsigned short dest_port;
|
||||
unsigned short length;
|
||||
unsigned short checksum;
|
||||
} hdr_udp_t;
|
||||
|
||||
hdr_udp_t HDR_UDP = {0, 0, 0, 0};
|
||||
|
||||
char tempbuf[64];
|
||||
|
||||
/*----------------------------------------------------------------------
|
||||
* Stuff for writing a PCap file
|
||||
*/
|
||||
#define PCAP_MAGIC 0xa1b2c3d4
|
||||
|
||||
/* "libpcap" file header (minus magic number). */
|
||||
struct pcap_hdr {
|
||||
unsigned long magic; /* magic */
|
||||
unsigned short version_major; /* major version number */
|
||||
unsigned short version_minor; /* minor version number */
|
||||
unsigned long thiszone; /* GMT to local correction */
|
||||
unsigned long sigfigs; /* accuracy of timestamps */
|
||||
unsigned long snaplen; /* max length of captured packets, in octets */
|
||||
unsigned long network; /* data link type */
|
||||
};
|
||||
|
||||
/* "libpcap" record header. */
|
||||
struct pcaprec_hdr {
|
||||
unsigned long ts_sec; /* timestamp seconds */
|
||||
unsigned long ts_usec; /* timestamp microseconds */
|
||||
unsigned long incl_len; /* number of octets of packet saved in file */
|
||||
unsigned long orig_len; /* actual length of packet */
|
||||
};
|
||||
|
||||
/* Link-layer type; see net/bpf.h for details */
|
||||
unsigned long pcap_link_type = 1; /* Default is DLT-EN10MB */
|
||||
|
||||
/*----------------------------------------------------------------------
|
||||
* Parse a single hex number
|
||||
* Will abort the program if it can't parse the number
|
||||
* Pass in TRUE if this is an offset, FALSE if not
|
||||
*/
|
||||
static unsigned long
|
||||
parse_num (char *str, int offset)
|
||||
{
|
||||
unsigned long num;
|
||||
char *c;
|
||||
|
||||
num = strtoul(str, &c, offset ? offset_base : 16);
|
||||
if (c==str) {
|
||||
fprintf(stderr, "FATAL ERROR: Bad hex number? [%s]\n", str);
|
||||
exit(-1);
|
||||
}
|
||||
return num;
|
||||
}
|
||||
|
||||
/*----------------------------------------------------------------------
|
||||
* Write this byte into current packet
|
||||
*/
|
||||
static void
|
||||
write_byte (char *str)
|
||||
{
|
||||
unsigned long num;
|
||||
|
||||
if (debug>=2)
|
||||
fprintf(stderr, __FUNCTION__);
|
||||
|
||||
num = parse_num(str, FALSE);
|
||||
packet_buf[curr_offset] = num;
|
||||
curr_offset ++;
|
||||
}
|
||||
|
||||
/*----------------------------------------------------------------------
|
||||
* Compute one's complement checksum (from RFC1071)
|
||||
*/
|
||||
static unsigned short
|
||||
in_checksum (void *buf, unsigned long count)
|
||||
{
|
||||
unsigned long sum = 0;
|
||||
unsigned short *addr = buf;
|
||||
|
||||
while( count > 1 ) {
|
||||
/* This is the inner loop */
|
||||
sum += ntohs(* (unsigned short *) addr++);
|
||||
count -= 2;
|
||||
}
|
||||
|
||||
/* Add left-over byte, if any */
|
||||
if( count > 0 )
|
||||
sum += * (unsigned char *) addr;
|
||||
|
||||
/* Fold 32-bit sum to 16 bits */
|
||||
while (sum>>16)
|
||||
sum = (sum & 0xffff) + (sum >> 16);
|
||||
|
||||
return htons(~sum);
|
||||
}
|
||||
|
||||
/*----------------------------------------------------------------------
|
||||
* Write current packet out
|
||||
*/
|
||||
static void
|
||||
write_current_packet (void)
|
||||
{
|
||||
int length = 0;
|
||||
int udp_length = 0;
|
||||
int ip_length = 0;
|
||||
int eth_trailer_length = 0;
|
||||
struct pcaprec_hdr ph;
|
||||
|
||||
if (curr_offset > 0) {
|
||||
/* Write the packet */
|
||||
|
||||
/* Compute packet length */
|
||||
length = curr_offset;
|
||||
if (hdr_udp) { length += sizeof(HDR_UDP); udp_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 = num_packets_written;
|
||||
ph.ts_usec = num_packets_written;
|
||||
ph.incl_len = length;
|
||||
ph.orig_len = length;
|
||||
fwrite(&ph, sizeof(ph), 1, output_file);
|
||||
|
||||
/* Write Ethernet header */
|
||||
if (hdr_ethernet) {
|
||||
HDR_ETHERNET.l3pid = htons(hdr_ethernet_proto);
|
||||
fwrite(&HDR_ETHERNET, sizeof(HDR_ETHERNET), 1, output_file);
|
||||
}
|
||||
|
||||
/* Write IP header */
|
||||
if (hdr_ip) {
|
||||
HDR_IP.packet_length = htons(ip_length);
|
||||
HDR_IP.protocol = 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);
|
||||
}
|
||||
|
||||
/* Write UDP header */
|
||||
if (hdr_udp) {
|
||||
HDR_UDP.source_port = htons(hdr_udp_src);
|
||||
HDR_UDP.dest_port = htons(hdr_udp_dest);
|
||||
HDR_UDP.length = htons(udp_length);
|
||||
|
||||
fwrite(&HDR_UDP, sizeof(HDR_UDP), 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\n", curr_offset);
|
||||
num_packets_written ++;
|
||||
}
|
||||
curr_offset = 0;
|
||||
}
|
||||
|
||||
/*----------------------------------------------------------------------
|
||||
* Write the PCap file header
|
||||
*/
|
||||
static void
|
||||
write_file_header (void)
|
||||
{
|
||||
struct pcap_hdr fh;
|
||||
|
||||
if (debug>=2)
|
||||
fprintf(stderr, __FUNCTION__);
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
/*----------------------------------------------------------------------
|
||||
* Start a new packet
|
||||
*/
|
||||
static void
|
||||
start_new_packet (void)
|
||||
{
|
||||
if (debug>=2)
|
||||
fprintf(stderr, __FUNCTION__);
|
||||
|
||||
if (debug>=1)
|
||||
fprintf(stderr, "Start new packet\n");
|
||||
|
||||
/* Write out the current packet, if required */
|
||||
write_current_packet();
|
||||
curr_offset = 0;
|
||||
num_packets_read ++;
|
||||
}
|
||||
|
||||
/*----------------------------------------------------------------------
|
||||
* Process a directive
|
||||
*/
|
||||
static void
|
||||
process_directive (char *str)
|
||||
{
|
||||
if (debug>=2)
|
||||
fprintf(stderr, __FUNCTION__);
|
||||
|
||||
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_DIRECTIVE:
|
||||
process_directive(str);
|
||||
break;
|
||||
case T_OFFSET:
|
||||
num = parse_num(str, TRUE);
|
||||
if (num==0) {
|
||||
/* New packet starts here */
|
||||
start_new_packet();
|
||||
state = OFFSET;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
/* ----- Processing packet, start of new line -----------------------------*/
|
||||
case START_OF_LINE:
|
||||
switch(token) {
|
||||
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 = OFFSET;
|
||||
} else if (num != curr_offset) {
|
||||
/* 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 = OFFSET;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
/* ----- Processing packet, read offset -----------------------------------*/
|
||||
case OFFSET:
|
||||
switch(token) {
|
||||
case T_BYTE:
|
||||
/* Record the byte */
|
||||
state = BYTE;
|
||||
write_byte(str);
|
||||
break;
|
||||
case T_TEXT:
|
||||
case T_DIRECTIVE:
|
||||
case T_OFFSET:
|
||||
state = TEXT;
|
||||
break;
|
||||
case T_EOL:
|
||||
state = START_OF_LINE;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
/* ----- Processing packet, read byte -------------------------------------*/
|
||||
case BYTE:
|
||||
switch(token) {
|
||||
case T_BYTE:
|
||||
/* Record the byte */
|
||||
write_byte(str);
|
||||
break;
|
||||
case T_TEXT:
|
||||
case T_DIRECTIVE:
|
||||
case T_OFFSET:
|
||||
state = TEXT;
|
||||
break;
|
||||
case T_EOL:
|
||||
state = START_OF_LINE;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
/* ----- Processing packet, read text -------------------------------------*/
|
||||
case 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 helpstring and exit
|
||||
*/
|
||||
static void
|
||||
help (char *progname)
|
||||
{
|
||||
fprintf(stderr,
|
||||
"\n"
|
||||
"Usage: %s [-d] [-q] [-o h|o] [-l typenum] [-e l3pid] [-i proto] \n"
|
||||
" [-u srcp destp] <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"
|
||||
"[options] are one or more of the following \n"
|
||||
"\n"
|
||||
" -w filename : Write capfile to <filename>. Default is standard output\n"
|
||||
" -h : Display this help message \n"
|
||||
" -d : Generate detailed debug of parser states \n"
|
||||
" -o hex|oct : Parse offsets as (h)ex or (o)ctal. Default is hex\n"
|
||||
" -l typenum : Specify link-layer type number. Default is 1 (Ethernet). \n"
|
||||
" See net/bpf.h for list of numbers.\n"
|
||||
" -q : Generate no output at all (automatically turns off -d)\n"
|
||||
" -e l3pid : Prepend dummy Ethernet II header with specified L3PID (in HEX)\n"
|
||||
" Example: -e 0x800\n"
|
||||
" -i proto : Prepend dummy IP header with specified IP protocol (in DECIMAL). \n"
|
||||
" Automatically prepends Ethernet header as well. Example: -i 46\n"
|
||||
" -u srcp destp: Prepend dummy UDP header with specified dest and source ports (in DECIMAL).\n"
|
||||
" Automatically prepends Ethernet and IP headers as well\n"
|
||||
" Example: -u 30 40"
|
||||
"\n",
|
||||
progname);
|
||||
|
||||
exit(-1);
|
||||
}
|
||||
|
||||
/*----------------------------------------------------------------------
|
||||
* Parse CLI options
|
||||
*/
|
||||
static void
|
||||
parse_options (int argc, char *argv[])
|
||||
{
|
||||
int c;
|
||||
|
||||
/* Scan CLI parameters */
|
||||
while ((c = getopt(argc, argv, "dqr:w:e:i:l:o:u:")) != -1) {
|
||||
switch(c) {
|
||||
case '?': help(argv[0]); break;
|
||||
case 'h': help(argv[0]); break;
|
||||
case 'd': if (!quiet) debug++; break;
|
||||
case 'q': quiet = TRUE; debug = FALSE; break;
|
||||
case 'l': pcap_link_type = atoi(optarg); break;
|
||||
case 'o':
|
||||
if (!optarg || (optarg[0]!='h' && optarg[0] != 'o')) {
|
||||
fprintf(stderr, "Bad argument for '-e': %s\n",
|
||||
optarg ? optarg : "");
|
||||
help(argv[0]);
|
||||
}
|
||||
offset_base = (optarg[0]=='o') ? 8 : 16;
|
||||
break;
|
||||
case 'e':
|
||||
hdr_ethernet = TRUE;
|
||||
if (!optarg || sscanf(optarg, "%0lx", &hdr_ethernet_proto) < 1) {
|
||||
fprintf(stderr, "Bad argument for '-e': %s\n",
|
||||
optarg ? optarg : "");
|
||||
help(argv[0]);
|
||||
}
|
||||
break;
|
||||
|
||||
case 'i':
|
||||
hdr_ip = TRUE;
|
||||
if (!optarg || sscanf(optarg, "%ld", &hdr_ip_proto) < 1) {
|
||||
fprintf(stderr, "Bad argument for '-i': %s\n",
|
||||
optarg ? optarg : "");
|
||||
help(argv[0]);
|
||||
}
|
||||
hdr_ethernet = TRUE;
|
||||
hdr_ethernet_proto = 0x800;
|
||||
break;
|
||||
|
||||
case 'u':
|
||||
hdr_udp = TRUE;
|
||||
if (!optarg || sscanf(optarg, "%ld", &hdr_udp_src) < 1) {
|
||||
fprintf(stderr, "Bad src port for '-u'\n");
|
||||
help(argv[0]);
|
||||
}
|
||||
if (optind >= argc || sscanf(argv[optind], "%ld", &hdr_udp_dest) < 1) {
|
||||
fprintf(stderr, "Bad dest port for '-u'\n");
|
||||
help(argv[0]);
|
||||
}
|
||||
hdr_ip = TRUE;
|
||||
hdr_ip_proto = 17;
|
||||
hdr_ethernet = TRUE;
|
||||
hdr_ethernet_proto = 0x800;
|
||||
break;
|
||||
|
||||
default:
|
||||
help(argv[0]);
|
||||
}
|
||||
}
|
||||
|
||||
if (optind >= argc || argc-optind < 2) {
|
||||
fprintf(stderr, "Must specify input and output filename\n");
|
||||
help(argv[0]);
|
||||
}
|
||||
|
||||
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) 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";
|
||||
}
|
||||
|
||||
/* 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_udp_src, hdr_udp_dest);
|
||||
}
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
|
@ -0,0 +1,47 @@
|
|||
/**-*-C-*-**********************************************************************
|
||||
*
|
||||
* text2pcap.h
|
||||
*
|
||||
* Utility to convert an ASCII hexdump into a libpcap-format capture file
|
||||
*
|
||||
* (c) Copyright 2001 Ashok Narayanan <ashokn@cisco.com>
|
||||
*
|
||||
* $Id: text2pcap.h,v 1.1 2001/05/16 21:32:04 ashokn Exp $
|
||||
*
|
||||
* Ethereal - Network traffic analyzer
|
||||
* By Gerald Combs <gerald@ethereal.com>
|
||||
* Copyright 1998 Gerald Combs
|
||||
*
|
||||
*
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* of the License, or (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*
|
||||
*******************************************************************************/
|
||||
|
||||
|
||||
#ifndef TEXT2PCAP_H
|
||||
#define TEXT2PCAP_H
|
||||
|
||||
typedef enum {
|
||||
T_BYTE = 1,
|
||||
T_OFFSET,
|
||||
T_DIRECTIVE,
|
||||
T_TEXT,
|
||||
T_EOL
|
||||
} token_t;
|
||||
|
||||
void parse_token(token_t token, char *str);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue