WIFIPI
(Posted 2014-04-04 09:28:43 by corey_reichle)

If you ever wanted a small, low-powered (Watts) wifi router, that is highly
extensible, look no further than your Raspberry Pi! This script converts
your Pi (Running Wheezy) into a Wifi Access point!


#!/bin/bash

#################################################################
#
# Wifi build script
#	vr 0.5
#
# Written by Corey Reichle
# 11/13/2013
# Copyright (c) 2013 by Corey Reichle.  Released under GPL 3 or later.
#
# Based on:
#
	https://web.archive.org/web/20131109030345/http://learn.adafruit.com/onion-pi/overview
#	https://web.archive.org/web/20130904194049/http://learn.adafruit.com/setting-up-a-raspberry-pi-as-a-wifi-access-point
#
#################################################################

cat << '_EOF'
This is a build script for the Raspberry Pi, that turns your Pi into a
wifi
access point.

Special thanks goes to Ladyada for her tutorials on adafruit.com, and
SirLagz
for his package list of non-required packages.

For this script to run correctly, it must be executed as root, or with
sudo.  It
cannot be ran as a non-privileged user.  It also presumes you have wlan0 as
your
wifi card, and eth0 as the onboard NIC.  You also require a proper wifi
card that
can handle being an AP (Presuming the Edimax cards here).

_EOF

read -p "Press [Enter] key to start install, or CTRL-C to exit..."

echo "Setting up environment:"
cd /home/pi

echo "Getting files:"

echo "Installing required programs via apt..."
apt-get -y install wget hostapd isc-dhcp-server &>/dev/null
echo "Downloading hostapd binary..."
wget http://www.adafruit.com/downloads/adafruit_hostapd.zip

# And, for security, and science...  You monster.
echo "Removing un-needed programs..."
apt-get -y purge alsa-base alsa-utils aptitude aspell-en blt console-setup
console-setup-linux consolekit cups-bsd dbus dbus-x11 \
debian-reference-common debian-reference-en desktop-base desktop-file-utils
dictionaries-common dillo dpkg-dev fakeroot fontconfig \
fontconfig-config fonts-droid fuse galculator gconf2 gconf2-common gdb gksu
gnome-accessibility-themes gsfonts gsfonts-x11 idle idle-python2.7 \
lesstif2:armhf libarchive12:armhf libasound2:armhf libaspell15
libasyncns0:armhf libatasmart4:armhf libatk1.0-0:armhf libaudit0
libavahi-client3:armhf \
libavahi-common3:armhf libavahi-glib1:armhf libbluetooth3:armhf
libbluray1:armhf libboost-iostreams1.46.1 libboost-iostreams1.48.0 \
libboost-iostreams1.49.0 libboost-iostreams1.50.0 libcaca0:armhf
libcairo-gobject2:armhf libcairo2:armhf libcdio-cdda1 libcdio-paranoia1 \
libcdio13 libck-connector0:armhf libcolord1:armhf libcroco3:armhf
libcups2:armhf libcupsimage2:armhf libcwidget3 libdaemon0 libdatrie1:armhf
\
libdbus-glib-1-2:armhf libdconf0:armhf libdevmapper-event1.02.1:armhf
libdirectfb-1.2-9:armhf libdrm2:armhf libept1.4.12 libexif12:armhf \
libffi5:armhf libflac8:armhf libfltk1.3:armhf libfm-data libfm-gtk-bin
libfm-gtk1 libfm1 libfontconfig1:armhf libfontenc1:armhf libfreetype6:armhf
\
libfuse2:armhf libgail-3-0:armhf libgail18:armhf libgconf-2-4:armhf
libgd2-xpm:armhf libgdk-pixbuf2.0-0:armhf libgdu0 libgeoclue0
libgfortran3:armhf \
libgif4 libgksu2-0 libgl1-mesa-glx:armhf libglade2-0 libglapi-mesa:armhf
libglib2.0-0:armhf libgnome-keyring0:armhf libgphoto2-2:armhf \
libgphoto2-port0:armhf libgs9 libgstreamer-plugins-base0.10-0:armhf
libgstreamer0.10-0:armhf libgtk-3-0:armhf libgtk-3-bin libgtk-3-common \
libgtk2.0-0:armhf libgtk2.0-common libgtop2-7 libgudev-1.0-0:armhf
libhunspell-1.3-0:armhf libice6:armhf libicu48:armhf libid3tag0 libident \
libijs-0.35 libimlib2 libimobiledevice2 libjasper1:armhf
libjavascriptcoregtk-1.0-0 libjavascriptcoregtk-3.0-0 libjbig0:armhf
libjbig2dec0 \
libjson0:armhf liblapack3 liblcms1:armhf liblcms2-2:armhf
liblightdm-gobject-1-0 libltdl7:armhf liblvm2app2.2:armhf libmad0
libmagic1:armhf \
libmenu-cache1 libmikmod2:armhf libmng1:armhf libmtdev1:armhf
libnettle4:armhf libnih-dbus1 libnih1 libnotify4:armhf libobrender27
libobt0 \
libogg0:armhf libopenjpeg2:armhf liborc-0.4-0:armhf libpango1.0-0:armhf
libpaper1:armhf libpci3:armhf libpciaccess0:armhf libpixman-1-0:armhf \
libplist1 libpng12-0:armhf libpolkit-agent-1-0:armhf
libpolkit-backend-1-0:armhf libpolkit-gobject-1-0:armhf libpoppler19:armhf
libportmidi0 \
libproxy0:armhf libpulse0:armhf libpython2.7 libqt4-network:armhf
libqt4-svg:armhf libqt4-xml:armhf libqtcore4:armhf libqtdbus4:armhf \
libqtgui4:armhf libqtwebkit4:armhf libraspberrypi0 librsvg2-2:armhf
libsamplerate0:armhf libsdl-image1.2:armhf libsdl-mixer1.2:armhf \
libsdl-ttf2.0-0:armhf libsdl1.2debian:armhf libsgutils2-2 libsm6:armhf
libsmbclient:armhf libsmpeg0:armhf libsndfile1:armhf
libsoup-gnome2.4-1:armhf \
libsoup2.4-1:armhf libsqlite3-0:armhf libstartup-notification0
libsystemd-login0:armhf libthai0:armhf libtiff4:armhf libts-0.0-0:armhf
libunique-1.0-0 \
libusbmuxd1 libvorbis0a:armhf libvorbisenc2:armhf libvorbisfile3:armhf
libvte9 libwayland0:armhf libwebkitgtk-1.0-0 libwebkitgtk-3.0-0
libwebp2:armhf \
libwnck22 libx11-6:armhf libx11-xcb1:armhf libxapian22 libxau6:armhf
libxaw7:armhf libxcb-glx0:armhf libxcb-render0:armhf libxcb-shape0:armhf \
libxcb-shm0:armhf libxcb-util0:armhf libxcb-xfixes0:armhf libxcb1:armhf
libxcomposite1:armhf libxcursor1:armhf libxdamage1:armhf libxdmcp6:armhf \
libxext6:armhf libxfixes3:armhf libxfont1 libxft2:armhf libxi6:armhf
libxinerama1:armhf libxkbcommon0:armhf libxkbfile1:armhf libxklavier16 \
libxml2:armhf libxmu6:armhf libxmuu1:armhf libxp6:armhf libxpm4:armhf
libxrandr2:armhf libxrender1:armhf libxres1:armhf libxslt1.1:armhf \
libxss1:armhf libxt6:armhf libxtst6:armhf libxv1:armhf libxxf86dga1:armhf
libxxf86vm1:armhf lightdm lightdm-gtk-greeter lxappearance lxde-common \
lxde-icon-theme lxmenu-data lxpolkit lxrandr lxtask lxterminal menu
menu-xdg midori mime-support mountall netsurf-gtk obconf omxplayer openbox
\
pciutils pcmanfm plymouth policykit-1 poppler-data python python-support
python2.7 python2.7-minimal python3 python3.2 python3.2-minimal scratch \
sgml-base shared-mime-info squeak-vm tasksel tcl8.5 tk8.5 tsconf udisks
update-inetd weston wpagui x11-common x11-utils x11-xserver-utils xarchiver
\
xfonts-utils xinit xml-core xpdf xserver-xorg xserver-xorg-core
idle-python3.2 idle3 ifplugd info leafpad &>/dev/null

echo "Making system configuration changes:"
echo "Modifying sysctl.conf..."
cat > /etc/sysctl.conf <<'_EOF'
kernel.printk = 3 4 1 3
net.ipv4.ip_forward=1
vm.swappiness=1
vm.min_free_kbytes = 8192
_EOF

echo "Writing the hostapd config file..."
cat > /etc/hostapd/hostapd.conf <<'_EOF'
interface=wlan0
driver=rtl871xdrv
ssid=Pi_AP
hw_mode=g
channel=6
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=Raspberry
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
_EOF

cat > /etc/default/hostapd <<'_EOF'
DAEMON_CONF="/etc/hostapd/hostapd.conf"
_EOF

echo "Writing new network interfaces file..."
cat > /etc/network/interfaces <<'_EOF'
auto lo
auto eth0

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet static
  address 192.168.42.1
  netmask 255.255.255.0
  up iptables-restore < /etc/iptables.ipv4.nat

_EOF

echo "writing new dhcp files..."
cat > /etc/default/isc-dhcp-server <<'_EOF'
INTERFACES="wlan0"
_EOF

cat > /etc/dhcp/dhcpd.conf <<'_EOF'
ddns-update-style none;
default-lease-time 600;
max-lease-time 7200;
authoritative;
log-facility local7;

subnet 192.168.42.0 netmask 255.255.255.0 {
range 192.168.42.10 192.168.42.50;
option broadcast-address 192.168.42.255;
option routers 192.168.42.1;
default-lease-time 600;
max-lease-time 7200;
option domain-name "local";
option domain-name-servers 8.8.8.8, 8.8.4.4;
}
_EOF


echo "Making iptables rules, and saving them:"
cat > /etc/iptables.ipv4.nat <<'_EOF'
#iptables-save v1.4.14 on Tue Jan 01 00:00:50 2013
sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
sudo iptables -A FORWARD -i eth0 -o wlan0 -m state --state
RELATED,ESTABLISHED -j ACCEPT
sudo iptables -A FORWARD -i wlan0 -o eth0 -j ACCEPT
_EOF
echo "Giving you a new hostapd binary:"

echo "Unzippping..."
unzip /home/pi/adafruit_hostapd.zip

echo "Installing new binary..."
mv /home/pi/hostapd /usr/sbin
chmod 755 /usr/sbin/hostapd

echo "Ensuring services start..."
update-rc.d hostapd enable
update-rc.d isc-dhcp-server enable

read -p "Hit [ENTER] to reboot your Pi, or CTRL-C to cancel reboot."
reboot


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