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Raspberry Piの WiFiでモニタモードでパケットキャプチャする方法、もとい、AirDropを動かす方法

# Raspberry Pi OS (previously called Raspbian)
# https://www.raspberrypi.org/downloads/raspberry-pi-os/
Raspberry Pi OS (32-bit) Lite
Minimal image based on Debian Buster
Version:August 2020
Release date:2020-08-20
Kernel version:5.4

bcm43455c0 7_45_189 Raspberry Pi B3+/B4 Raspbian Kernel 4.14/19, 5.4

sudo raspi-config nonint do_wifi_country JP

# Nexmon
# https://github.com/seemoo-lab/nexmon

# Build patches for bcm43430a1 on the RPI3/Zero W
# bcm434355c0 on the RPI3+/RPI4 using Raspbian/Raspberry Pi OS (recommended)

# Upgrade your Raspbian installation:
# apt-get update && apt-get upgrade
sudo apt update -y

# Install the kernel headers to build the driver and some dependencies:
sudo apt install -y raspberrypi-kernel-headers git libgmp3-dev gawk qpdf bison flex make

# Clone our repository:
cd
git clone https://github.com/seemoo-lab/nexmon.git --depth 1
cd nexmon
touch DISABLE_STATISTICS

# Go into the root directory of our repository: cd nexmon
# Check if /usr/lib/arm-linux-gnueabihf/libisl.so.10 exists,
#  if not, compile it from source:
if [[ ! -f /usr/lib/arm-linux-gnueabihf/libisl.so.10 ]]; then \
   cd buildtools/isl-0.10/ && ./configure && make -j4 && sudo make install && \
   sudo ln -s /usr/local/lib/libisl.so \
         /usr/lib/arm-linux-gnueabihf/libisl.so.10 && \
   cd ../../ ; fi

# GNU Automake package
sudo apt install -y automake-1.15

# Check if /usr/lib/arm-linux-gnueabihf/libmpfr.so.4 exists,
#  if not, compile it from source:
if [[ ! -f /usr/lib/arm-linux-gnueabihf/libmpfr.so.4 ]]; then \
   cd buildtools/mpfr-3.1.4/ && ./configure && make -j4 && sudo make install && \
   sudo ln -s /usr/local/lib/libmpfr.so \
         /usr/lib/arm-linux-gnueabihf/libmpfr.so.4 && \
   cd ../../ ; fi

# GNU Automake package
# sudo apt install -y automake-1.15
# WARNING: 'aclocal-1.15' is missing on your system.
#          You should only need it if you modified 'acinclude.m4' or
#          'configure.ac' or m4 files included by 'configure.ac'.
#          The 'aclocal' program is part of the GNU Automake package:
#          <http://www.gnu.org/software/automake>
#          It also requires GNU Autoconf, GNU m4 and Perl in order to run:
#          <http://www.gnu.org/software/autoconf>
#          <http://www.gnu.org/software/m4/>
#          <http://www.perl.org/>
# make: *** [Makefile:425: aclocal.m4] Error 127

sudo su

# Then you can setup the build environment for compiling firmware patches
# Setup the build environment:
source setup_env.sh

# Compile some build tools and extract the ucode and flashpatches from the original firmware files:
make -j4

# bcm43455c0 7_45_189 Raspberry Pi B3+/B4 Raspbian Kernel 4.14/19, 5.4
# Go to the patches folder for the bcm43430a1/bcm43455c0 chipset:
cd patches/bcm43455c0/7_45_206/nexmon/

# Compile a patched firmware:
# -j1
make

# Generate a backup of your original firmware file:
make backup-firmware

# Install the patched firmware on your RPI3:
make install-firmware

cd ../../../../

# exit su
exit

# Install nexutil: from the root directory of our repository switch to the nexutil folder:
cd utilities/nexutil/

# Compile and install nexutil:
# -j1
make && sudo make install
cd ../../

# Optional: remove wpa_supplicant for better control over the WiFi interface:
sudo apt remove -y wpasupplicant

# Note: To connect to regular access points you have to execute nexutil -m0 first
nexutil -m0

# Using the Monitor Mode patch
# Thanks to the prior work of Mame82, you can setup a new monitor mode interface by executing:
sudo iw phy `iw dev wlan0 info | gawk '/wiphy/ {printf "phy" $2}'` interface add mon0 type monitor

# To activate monitor mode in the firmware, simply set the interface up:
sudo ifconfig mon0 up

# At this point, monitor mode is active. There is no need to call airmon-ng.
# The interface already set the Radiotap header, therefore, tools like tcpdump or airodump-ng can be used out of the box:
tcpdump -i mon0

# Optional: To make the RPI3 load the modified driver after reboot:
# Find the path of the default driver at reboot: modinfo brcmfmac #the first line should be the full path
modinfo brcmfmac | grep filename
# filename:       /lib/modules/5.4.51-v7l+/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko
ls -l /lib/modules/5.4.51-v7l+/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko
# -rw-r--r-- 1 root root 401820 Jul 20 07:51 /lib/modules/5.4.51-v7l+/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko

# Backup the original driver: mv "<PATH TO THE DRIVER>/brcmfmac.ko" "<PATH TO THE DRIVER>/brcmfmac.ko.orig"
sudo mv /lib/modules/5.4.51-v7l+/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko /lib/modules/5.4.51-v7l+/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko.orig

# Copy the modified driver (Kernel 4.9): cp /home/pi/nexmon/patches/bcm43430a1/7_45_41_46/nexmon/brcmfmac_kernel49/brcmfmac.ko "<PATH TO THE DRIVER>/"
# Copy the modified driver (Kernel 4.14): cp /home/pi/nexmon/patches/bcm43430a1/7_45_41_46/nexmon/brcmfmac_4.14.y-nexmon/brcmfmac.ko "<PATH TO THE DRIVER>/"
# i@raspberrypi:~/nexmon/patches/bcm43455c0/7_45_206/nexmon $ ls -l brcmfmac_5.4.y-nexmon/brcmfmac.ko
# -rw-r--r-- 1 pi pi 406292 Sep  6 12:41 brcmfmac_5.4.y-nexmon/brcmfmac.ko
sudo cp ~/nexmon/patches/bcm43455c0/7_45_206/nexmon/brcmfmac_5.4.y-nexmon/brcmfmac.ko /lib/modules/5.4.51-v7l+/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko


# Probe all modules and generate new dependency: depmod -a
sudo depmod -a

# The new driver should be loaded by default after reboot: reboot
sudo reboot

# * Note: It is possible to connect to an access point or run your own access point in parallel to the monitor mode interface on the wlan0 interface.

# Open Wireless Link
# Howto: Use AirDrop on a Raspberry Pi 3
# May 16, 2019
# https://owlink.org/2019/05/16/howto-use-airdrop-on-raspberry-pi-3.html

# Install OWL
# https://github.com/seemoo-lab/owl
sudo apt install -y libpcap-dev libev-dev libnl-3-dev \
                 libnl-genl-3-dev libnl-route-3-dev cmake

cd
git clone https://github.com/seemoo-lab/owl.git --depth 1
cd owl
git submodule update --init
mkdir build
cd build
cmake ..
make -j4
sudo make install

# Install OpenDrop
# https://github.com/seemoo-lab/opendrop
sudo apt install -y python3 python3-pip libjpeg-dev libopenjp2-7-dev

cd
git clone https://github.com/seemoo-lab/opendrop.git --depth 1
sudo pip3 install ./opendrop

# Receive files via AirDrop
sudo iw phy `iw dev wlan0 info | gawk '/wiphy/ {printf "phy" $2}'` interface add mon0 type monitor
sudo ifconfig mon0 up
sudo nexutil -k6

# AWDL
sudo owl -i mon0 -N

pi@raspberrypi:~ $ sudo owl -i mon0 -N
              .oOXWMMMMWXOx:
         .oOOOx:'''''''''''':OOOx:
      oXOo'      ........      ':OXx.
           .oOOO''''''''''OOOo.
        oXOo'                'oOO:
             :oOOOOXXXXOOOOo:.
          oXO:'            ':OXo
              .:xOXXXXXXOx:.
          .xXMMMMMMMMMMMMMMMMXx.
  'XWWWWWWMMMMMMMMMMMMMMMMMMMMMMWWWWWWX'
    oWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWo
     OMMMMMMWWMMMMMMMMMMMMMMWWWMMMMMO
    OMMWx'      'xWMMMMWx'      'oXMMO
   :MW:            oMMx            'WM:
   XM'    .xOOo.    :o     .xOOo.    WX
   WX    :MMMMMX          :MMMMMX    xW
   XW    'WMMMMX   .xx.   'WMMMWX    XX
   'Wx    'xWMx'   OMMO    'xWMx'   xM'
    'XX:           'XX'           :XX'
      'xXOx:..................:xXWx'
         'xXMMMMMMMMMMMMMMMMMMWO'

            Open Wireless Link

            https://owlink.org

13:05:56 INFO : WLAN device: mon0 (addr dc:a6:32:00:00:00)
13:05:56 INFO : Host device: awdl0

13:21:19 INFO : WLAN device: mon0 (addr dc:a6:32:11:22:33)
13:21:19 INFO : Host device: awdl0
13:21:21 INFO : add peer 6a:3:d5:44:55:66 ()
13:21:26 INFO : remove peer 6a:3:d5:44:55:66 ()
13:21:27 INFO : add peer 6a:3:d5:44:55:66 ()
13:21:51 INFO : remove peer 6a:3:d5:44:55:66 ()
13:21:55 INFO : add peer 6a:3:d5:44:55:66 ()
13:22:09 INFO : remove peer 6a:3:d5:44:55:66 ()

opendrop receive
# ImportError: libtiff.so.5: cannot open shared object file: No such file or directory
sudo apt install -y libtiff5

pi@raspberrypi:~ $ opendrop receive
Key file or certificate does not exist
Create new self-signed certificate in /home/pi/.opendrop/keys
Announcing service: host raspberrypi, address fe80::1111:2222:3333:4444, port 8771
Starting HTTPS server

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