[wifi] capture: refactoring
This commit is contained in:
parent
6739ade2a6
commit
edc7cc4dfd
198
wifi/capture.sh
198
wifi/capture.sh
|
|
@ -32,6 +32,23 @@
|
|||
#set -x
|
||||
set -e
|
||||
|
||||
|
||||
## Parameters (tune them if you want) ##
|
||||
|
||||
# Number of packet to capture:
|
||||
NB_PKT=10
|
||||
# Maximal time of a capture on a given channel:
|
||||
TIMEOUT=15
|
||||
# Temporary directory:
|
||||
TMP=/tmp
|
||||
# Name of the capture file:
|
||||
FILE=capture.pcap
|
||||
# First channel to scan:
|
||||
CHANNEL=1
|
||||
|
||||
|
||||
## Functions ##
|
||||
|
||||
# Displays the message in argument and exits
|
||||
error()
|
||||
{
|
||||
|
|
@ -39,14 +56,59 @@ error()
|
|||
exit 1
|
||||
}
|
||||
|
||||
# Verifies the presence of the needed programs
|
||||
check_dependencies()
|
||||
{
|
||||
which tcpdump >/dev/null \
|
||||
|| error "tcpdump is required to run this program!"
|
||||
|
||||
if [ "$OS" = Linux ] ; then
|
||||
[ -x /sbin/iwconfig ] \
|
||||
|| error "iwconfig is required to run this program on Linux!"
|
||||
fi
|
||||
}
|
||||
|
||||
# Turns on the capture interface
|
||||
iface_up()
|
||||
{
|
||||
echo -n "Turning up interface $IFACE... "
|
||||
ifconfig $IFACE up && echo "OK." \
|
||||
|| error "Cannot turn the interface up!"
|
||||
}
|
||||
|
||||
# Shuts down the capture interface
|
||||
iface_down()
|
||||
{
|
||||
echo -n "Shuting down interface $IFACE... "
|
||||
ifconfig $IFACE down && echo "OK." \
|
||||
|| error "Cannot shut down the interface!"
|
||||
}
|
||||
|
||||
# Switches the capture interface to monitor mode
|
||||
iface_monitor()
|
||||
{
|
||||
echo -n "Switching interface $IFACE to monitor mode... "
|
||||
case $OS in
|
||||
Linux)
|
||||
iwconfig $IFACE mode monitor
|
||||
;;
|
||||
NetBSD)
|
||||
ifconfig $IFACE media autoselect mediaopt monitor
|
||||
;;
|
||||
*)
|
||||
error "Your OS is not supported."
|
||||
;;
|
||||
esac \
|
||||
&& echo "OK." \
|
||||
|| error "Cannot switch the interface to monitor mode!"
|
||||
}
|
||||
|
||||
# Switches the capture interface on the channel in argument
|
||||
set_channel()
|
||||
iface_set_channel()
|
||||
{
|
||||
echo -n "Setting interface $IFACE on channel $1... "
|
||||
case $OS in
|
||||
Linux)
|
||||
[ -x /sbin/iwconfig ] \
|
||||
|| error "iwconfig is required to run this program on Linux!"
|
||||
iwconfig $IFACE channel $1
|
||||
;;
|
||||
NetBSD)
|
||||
|
|
@ -74,25 +136,57 @@ wait_tcpdump()
|
|||
pkill tcpdump
|
||||
}
|
||||
|
||||
# Gets some information about the running system
|
||||
gather_system_information()
|
||||
{
|
||||
echo -n "Gathering system information... "
|
||||
# Kernel & other information:
|
||||
uname -a >"$DIR"/uname-a
|
||||
# Wi-Fi interface information:
|
||||
ifconfig $IFACE >"$DIR"/ifconfig_$IFACE
|
||||
# PCI devices:
|
||||
which lspci >/dev/null \
|
||||
&& lspci >"$DIR"/lspci \
|
||||
|| echo "lspci not available! Please install pciutils. "
|
||||
# Loaded kernel modules & USB devices:
|
||||
case $OS in
|
||||
Linux)
|
||||
lsmod >"$DIR"/lsmod
|
||||
which lsusb >/dev/null \
|
||||
&& lsusb >"$DIR"/lsusb \
|
||||
|| echo "lsusb not available! Please install usbutils. "
|
||||
;;
|
||||
NetBSD)
|
||||
modstat >"$DIR"/modstat
|
||||
which usbstats >/dev/null \
|
||||
&& usbstats >"$DIR"/usbstats \
|
||||
|| echo "usbstats not available! Please install usbutil. "
|
||||
;;
|
||||
DragonFly)
|
||||
kldstat >"$DIR"/kldstat
|
||||
which usbstats >/dev/null \
|
||||
&& usbstats >"$DIR"/usbstats \
|
||||
|| echo "usbstats not available! Please install usbutil. "
|
||||
;;
|
||||
esac
|
||||
echo "OK."
|
||||
}
|
||||
|
||||
# Compresses the destination directory to a tarball
|
||||
create_archive()
|
||||
{
|
||||
FILE="${DIR}.tar.gz"
|
||||
DIR=`basename "$DIR"`
|
||||
tar -C "$TMP" -czf "$FILE" "$DIR"
|
||||
echo "Archive \"$FILE\" created."
|
||||
}
|
||||
|
||||
|
||||
## Main program ##
|
||||
|
||||
[ $# -eq 1 ] \
|
||||
|| error "Usage: $0 <wifi_interface>"
|
||||
|
||||
which tcpdump >/dev/null \
|
||||
|| error "tcpdump is required to run this program!"
|
||||
|
||||
## Parameters (tune them if you want) ##
|
||||
# Number of packet to capture:
|
||||
NB_PKT=10
|
||||
# Maximal time of a capture on a given channel:
|
||||
TIMEOUT=15
|
||||
# Temporary directory:
|
||||
TMP=/tmp
|
||||
# Name of the capture file:
|
||||
FILE=capture.pcap
|
||||
# First channel to scan:
|
||||
CHANNEL=1
|
||||
|
||||
## Generated parameters ##
|
||||
# Interface to capture from:
|
||||
IFACE=$1
|
||||
# Machine information:
|
||||
|
|
@ -102,30 +196,11 @@ HOSTNAME=`uname -n`
|
|||
# Current date:
|
||||
DATE=`date +%FT%H%M%S`
|
||||
|
||||
echo -n "Shuting down interface $IFACE... "
|
||||
ifconfig $IFACE down && echo "OK." \
|
||||
|| error "Cannot shut down the interface!"
|
||||
check_dependencies
|
||||
|
||||
echo -n "Switching interface $IFACE to monitor mode... "
|
||||
case $OS in
|
||||
Linux)
|
||||
[ -x /sbin/iwconfig ] \
|
||||
|| error "iwconfig is required to run this program on Linux!"
|
||||
iwconfig $IFACE mode monitor
|
||||
;;
|
||||
NetBSD)
|
||||
ifconfig $IFACE media autoselect mediaopt monitor
|
||||
;;
|
||||
*)
|
||||
error "Your OS is not supported."
|
||||
;;
|
||||
esac \
|
||||
&& echo "OK." \
|
||||
|| error "Cannot configure the interface!"
|
||||
|
||||
echo -n "Turning up interface $IFACE... "
|
||||
ifconfig $IFACE up && echo "OK." \
|
||||
|| error "Cannot turn the interface up!"
|
||||
iface_down
|
||||
iface_monitor
|
||||
iface_up
|
||||
|
||||
echo "Trying to capture $NB_PKT packets..."
|
||||
DIR=$(mktemp -d \
|
||||
|
|
@ -133,7 +208,7 @@ DIR=$(mktemp -d \
|
|||
FILE="$DIR/$FILE"
|
||||
CAPTURED=0
|
||||
while [ $CAPTURED -eq 0 -a $CHANNEL -le 14 ] ; do
|
||||
set_channel $CHANNEL
|
||||
iface_set_channel $CHANNEL
|
||||
wait_tcpdump $TIMEOUT &
|
||||
invoke_tcpdump
|
||||
CAPTURED=$?
|
||||
|
|
@ -146,42 +221,9 @@ done
|
|||
&& echo "Capture file \"$FILE\" created with $CAPTURED packets." \
|
||||
|| error "Failed to capture any packet!"
|
||||
|
||||
echo -n "Gathering system information... "
|
||||
# Kernel & other information:
|
||||
uname -a >"$DIR"/uname-a
|
||||
# Wi-Fi interface information:
|
||||
ifconfig $IFACE >"$DIR"/ifconfig_$IFACE
|
||||
# PCI devices:
|
||||
which lspci >/dev/null \
|
||||
&& lspci >"$DIR"/lspci \
|
||||
|| echo "lspci not available! Please install pciutils. "
|
||||
# Loaded kernel modules & USB devices:
|
||||
case $OS in
|
||||
Linux)
|
||||
lsmod >"$DIR"/lsmod
|
||||
which lsusb >/dev/null \
|
||||
&& lsusb >"$DIR"/lsusb \
|
||||
|| echo "lsusb not available! Please install usbutils. "
|
||||
;;
|
||||
NetBSD)
|
||||
modstat >"$DIR"/modstat
|
||||
which usbstats >/dev/null \
|
||||
&& usbstats >"$DIR"/usbstats \
|
||||
|| echo "usbstats not available! Please install usbutil. "
|
||||
;;
|
||||
DragonFly)
|
||||
kldstat >"$DIR"/kldstat
|
||||
which usbstats >/dev/null \
|
||||
&& usbstats >"$DIR"/usbstats \
|
||||
|| echo "usbstats not available! Please install usbutil. "
|
||||
;;
|
||||
esac
|
||||
echo "OK."
|
||||
gather_system_information
|
||||
create_archive
|
||||
|
||||
FILE="${DIR}.tar.gz"
|
||||
DIR=`basename "$DIR"`
|
||||
tar -C "$TMP" -czf "$FILE" "$DIR"
|
||||
echo "Archive \"$FILE\" created."
|
||||
rm -fr "$TMP/$DIR"
|
||||
|
||||
echo
|
||||
|
|
|
|||
Loading…
Reference in New Issue