git clone git://git.osmocom.org/osmocom-bb.git

git clone git://git.osmocom.org/libosmocore.git

git clone git://git.srlabs.de/gprsdecode.git

wget http://srlabs.de/dl/gprs_multi.patch

wget http://gnuarm.com/bu-2.15_gcc-3.4.3-c-c++-java_nl-1.12.0_gi-6.1.tar.bz2

tar xf bu-.15_gcc-3.4.-c-c++-java_nl-1.12.0_gi-6.1.tar.bz2

cd ~/gprs_sniffer/libosmocore

autoreconf -i

./configure

make

sudo make install

cd ~/gprs_sniffer/gprsdecode

make

cd ~/gprs_sniffer/osmocom-bb

git checkout origin/sylvain/burst_ind

git checkout d1cb8ea9b784c7acbafbb2fdcedbdf4655c2f6f5

patch -p1 < ~/gprs_sniffer/gprs_multi.patch

cd src

export PATH=$PATH:~/gprs_sniffer/gnuarm-3.4./bin

make

# Conect Motorola phone with USB cable

cd ~/gprs_sniffer/osmocom-bb/src

./host/osmocon/osmocon -m c123xor -p /dev/ttyUSB0 ./target/firmware/board/compal_e88/layer1.compalram.bin

# Switch on Motorola phone

cd ~/gprs_sniffer/osmocom-bb/src

./host/layer23/src/misc/cell_log

# look for active networks in the output:

cell_log.c: Sync ARFCN  (rxlev -,  syncs left)

cell_log.c: Cell: ARFCN= MCC= MNC= (Italy, TIM)

# in this case, network is TIM, and ARFCN is

# kill cell_log with ctrl-c, and rerun with correct ARFCN:

./host/layer23/src/misc/layer23 -a 

# Data channel assignments look like this

layer3.c: GSM48 IMM ASS (ra=0x72, chan_nr=0x0a, HSN=, MAIO=,

TS=, SS=, TSC=)l1ctl.c: Tx Dedic.Mode Est Req (maio=,

hsn=, chan_nr=0x0a)

# Red lines indicate signal strength

# In this case  out of  slots are used:

l1ctl.c: BURST IND: @( = //) ( - dBm, SNR )

l1ctl.c: BURST IND: @( = //) ( - dBm, SNR )

l1ctl.c: BURST IND: @( = //) ( - dBm, SNR )

l1ctl.c: BURST IND: @( = //) ( - dBm, SNR )

# wait for session end or kill with ctrl-c

# A file like "bursts_20110821_1648_29_2094723_0a.dat" is produced

# Start Wireshark, capturing on interface "lo"

~/gprs_sniffer/gprsdecode/gprsdecode bursts_20110721_1648_29_2094723_0a.dat

wget http://srlabs.de/dl/gprs_262_80_0001_0000_20110710_2251_875_494777_0f.dat

~/gprs_sniffer/gprsdecode/gprsdecode gprs_262_80_0001_0000_20110710_2251_875_494777_0f.dat

wget http://srlabs.de/dl/gprs_262_80_0001_0000_20110710_2252_875_514147_0f.dat

~/gprs_sniffer/gprsdecode/gprsdecode gprs_262_80_0001_0000_20110710_2252_875_514147_0f.dat

svn co http://anonsvn.wireshark.org/wireshark/trunk wireshark

cd wireshark

./autogen.sh

./configure

make

sudo make install

# the default firmware captures  downlink slots,

# for uplink you need to compile a different firmware.

# open "osmocom-bb/src/target/firmware/layer1/prim_sniff.c"

# at line , modify #if 1 to 0

# go back to 'Compile and install libosmocore'