--- /dev/null
+#!/bin/bash
+
+# ANNA - Anna is Not Nothingness Anymore
+#
+# (c) Copyright 2005-2014 Eduardo Ramos Testillano & Francisco Ruiz Rayo
+#
+# http://redmine.teslayout.com/projects/anna-suite
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of the copyright holder nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: eduardo.ramos.testillano@gmail.com
+# cisco.tierra@gmail.com
+
+
+#############
+# VARIABLES #
+#############
+tmpdir=$(mktemp -d)
+
+#############
+# FUNCTIONS #
+#############
+
+usage () {
+ echo "Usage: $0 <pcap_file> [results_dir]"
+ echo
+ echo " pcap_file: pcap formatted file to be processed."
+ echo " results_dir: directory where results are stored."
+ echo " By default, pcap file dirname is used."
+ echo
+ echo " The utility, dumps the extracted hexadecimal content"
+ echo " and useful information as timestamps, source and"
+ echo " destination:"
+ echo " <results_dir>/<frame sequence>.hex"
+ echo " <results_dir>/<frame sequence>.metadata"
+ echo
+ _exit
+}
+
+_exit () {
+ echo
+ echo -e $1
+ echo
+
+ # Cleanup
+ rm -rf $tmpdir
+
+ rc=1
+ [ -n "$2" ] && rc=$2
+ exit $rc
+}
+
+
+#############
+# EXECUTION #
+#############
+
+echo
+echo "============================================"
+echo "Diameter buffer extractor from PCAP raw file"
+echo "============================================"
+echo
+
+# Usage:
+[ "$1" = "" ] && usage
+
+# Pcap file:
+PCAP_FILE=$1
+[ ! -f $PCAP_FILE ] && _exit "Cannot found provided pcap file '$1' !!"
+
+# Optional result dir:
+RESULTS_DIR=`dirname $PCAP_FILE`
+[ "$2" != "" ] && RESULTS_DIR=$2
+[ ! -d $RESULTS_DIR ] && _exit "The results directory '$RESULTS_DIR' must exists !!"
+
+# Get the frames with diameter content (take care about '-2' two-pass option and don't add it, because we need to get reassembled parts in their corresponding frames):
+# Fields needed (we won't need diameter.hopbyhopid & diameter.endtoendid to verify diameter message as hint patterns; length management will be enough):
+FIELDS_DIAMETER="-e diameter.cmd.code -e diameter.flags.request -e diameter.applicationId -e diameter.hopbyhopid -e diameter.endtoendid -e diameter.length"
+FIELDS="-e frame.number -e frame.time_epoch -e ip.src_host -e ip.dst_host $FIELDS_DIAMETER -e tcp.len -e frame.protocols -e tcp.segment"
+tshark -E separator="|" -r $PCAP_FILE -N mntC -Tfields $FIELDS 2>/dev/null | grep -i diameter > $tmpdir/diameter_frames
+# Example output:
+# /length\
+# frame timestamp src dst code R App-ID HopByHop EndToEnd DIAM TCP protocol segments
+# 1|1427215933.697904000|gt_traf|vcbavipt|272|1|16777238|0x0004e6e6|0x000bd986|432|432|eth:ip:tcp:diameter:diameter:diameter3gpp|
+# 3|1427215934.449523000|vcbavipt|gt_traf|272|0|16777238|0x0004e6e6|0x000bd986|292|292|eth:ip:tcp:diameter:diameter:diameter3gpp|
+# 5|1427215934.456160000|gt_traf|vcbavipt|||||||1400|eth:ip:tcp:diameter|
+# 6|1427215934.456204000|gt_traf|vcbavipt|265|1|16777236|0x000c73c3|0x0004cee4|1972|572|eth:ip:tcp:diameter:diameter:diameter3gpp|5,6
+# 8|1427215935.123559000|vcbavipt|gt_traf|265|0|16777236|0x000c73c3|0x0004cee4|248|248|eth:ip:tcp:diameter:diameter:diameter3gpp|
+all_frames=( $(cat $tmpdir/diameter_frames | cut -d\| -f1) )
+needs_join=( $(cat $tmpdir/diameter_frames | cut -d\| -f13) )
+main_frames=( $(cat $tmpdir/diameter_frames | awk -F\| '{ if ($11 != "") print $1 }') )
+
+# Reassemble procedure (using frame 1 as example):
+# (for non segmented frames, it is enough with tcp or diameter length within the frame content itself)
+# 1) Get the TCP length: 432 bytes. 432*2 = 864 characters per byte in hexadecimal string format
+# 2) Get the frame length: `wc -c $tmpdir/block.$frame` => 997
+# 3) Get 864 from the tail: `cat $tmpdir/block.$frame | cut -c133
+
+# Dump the hex blocks for all the diameter frames:
+cat $PCAP_FILE | rawshark -s -r - -d proto:diameter -F data 2>/dev/null > $tmpdir/all_hex_data
+for frame in ${all_frames[@]}; do
+ grep "^$frame " $tmpdir/all_hex_data | cut -d\" -f2 | sed 's/://g' > $tmpdir/block.$frame
+ frame_info=$(grep "^${frame}|" $tmpdir/diameter_frames)
+
+ # Get the diameter part:
+ tcp_len=$(echo $frame_info | cut -d\| -f11)
+ frm_len=$(wc -c $tmpdir/block.$frame | awk '{ print $1 }')
+ cut_len=$((frm_len-2*tcp_len))
+ cat $tmpdir/block.$frame | cut -c${cut_len}- > $RESULTS_DIR/$frame.hex
+ echo -n "Created $RESULTS_DIR/$frame.hex"
+
+ # Metadata:
+ ts=$(echo $frame_info | cut -d\| -f2)
+ date=$(date -d @$ts)
+ src=$(echo $frame_info | cut -d\| -f3)
+ dst=$(echo $frame_info | cut -d\| -f4)
+ code=$(echo $frame_info | cut -d\| -f5)
+ isreq=$(echo $frame_info | cut -d\| -f6)
+ appid=$(echo $frame_info | cut -d\| -f7)
+ hbh=$(echo $frame_info | cut -d\| -f8)
+ e2e=$(echo $frame_info | cut -d\| -f9)
+ # To decimal:
+ hbh=$(printf "%d\n" $hbh)
+ e2e=$(printf "%d\n" $e2e)
+ echo "date=$date" > $RESULTS_DIR/$frame.metadata
+ echo "timestamp=$ts" >> $RESULTS_DIR/$frame.metadata
+ echo "src=$src" >> $RESULTS_DIR/$frame.metadata
+ echo "dst=$dst" >> $RESULTS_DIR/$frame.metadata
+ echo "code=$code" >> $RESULTS_DIR/$frame.metadata
+ echo "isrequest=$isreq" >> $RESULTS_DIR/$frame.metadata
+ echo "applicationid=$appid" >> $RESULTS_DIR/$frame.metadata
+ #echo "sequence=${hbh}.${e2e}" >> $RESULTS_DIR/$frame.metadata
+# echo "hopbyhop=$hbh" >> $RESULTS_DIR/$frame.metadata
+# echo "endtoend=$e2e" >> $RESULTS_DIR/$frame.metadata
+
+ echo " and $RESULTS_DIR/$frame.metadata"
+done
+
+# Join frames which need to be reassembled:
+for group in ${needs_join[@]}; do
+ echo "Grouping frames $group ..."
+ group_array=( $(echo $group | sed 's/,/ /g') )
+ for frame in ${group_array[@]}; do
+ cat $RESULTS_DIR/$frame.hex >> $tmpdir/diam.$group
+ done
+ cat $tmpdir/diam.$group | tr -d '\n' > $RESULTS_DIR/$frame.hex
+done
+
+# Delete superfluous metadata:
+echo "Deleting superfluous buffers & metadata ..."
+segments=( $(cat $tmpdir/diameter_frames | awk -F\| '{ if ($10 == "") print $1 }') )
+for s in ${segments[@]}; do rm $RESULTS_DIR/$s.*; done
+
+
+_exit "Done!" 0
+
projects / anna.git / blobdiff