TP-Link, openwrt, openflow bro-ids and usb flash mounting

OpenWRT, OpenFlow and bro-ids on TP-Link TL-WR1043ND

I was given a task to mount USB Flash on tp-link router, here's how I did. here you can find detailed information about this hardware.

• AR7132 rev 2 24Kc V7.4 400 Mhz
• 32MB RAM
• 8MB Flash
• 4 x 1 port Athros ( RealTek RTL8366RB 5-port Gigabit switch w/ vlan support)
• Wireless: Atheros AR9103 2.4ghz 802.11bgn
• 1 WAN port 
• USB: Yes 1 x 2.0 (OHCI platform; device name 1-1) 
• 12V DC

The development platform I used is ubuntu vm on virtualbox.
lets start the build process:

Building the image

apt-get install build-essential binutils flex bison autoconf gettext texinfo sharutils subversion libncurses5-dev ncurses-term zlib1g-dev gawk 

mkdir ~/ofwrt
cd ~/ofwrt

svn co svn://svn.openwrt.org/openwrt/trunk/

cd trunk/

sudo ./scripts/feeds update -a

sudo ./scripts/feeds install -a

cd ~/ofwrt/

git clone git://gitosis.stanford.edu/openflow-openwrt

cd ~/ofwrt/trunk/packages/ 

ln -s ~/ofwrt/openflow-openwrt/openflow-1.0/

cd ~/ofwrt/trunk/ 

ln -s ~/ofwrt/openflow-openwrt/openflow-1.0/files

cd ~/ofwrt/

make menuconfig

• Select your platform for Target System (Atheros AR71xx)    Target System (Atheros AR7xxx/AR9xxx)  --->
• Target Profile (TP-LINK TL-WR1043N/ND)  --->
• Kernel modules  --->     
• Filesystems  --->
•  <*> kmod-fs-vfat..................................... VFAT filesystem
•  --- kmod-usb-core............................................ Support
•  <*> kmod-usb-ohci............................... Support for OHCI
•  <*>   kmod-usb-serial-option................... Support for Option
•  <*> kmod-usb-storage..................................... USB Storage
• <M> kmod-usb-storage-extras.................... Extra drivers for usb-storage                                                                             
•  <*> kmod-usb-uhci............................... Support for UHCI controllers 
•  <*> kmod-usb2................................... Support for USB2 controllers
•  <*> kmod-usb-uhci............................... Support for UHCI controllers
• Save & Quit
• I could not find few of the lines in menuconfig thats why I added them manually.
• cd trunk
• vi .config
• uncomment the following lines and put =y at the end
• CONFIG_PACKAGE_kmod-nls-base=y
• CONFIG_PACKAGE_kmod-nls-cp437=y

• Select OpenFlow package under network
• Select tc package under network
• Select kmod-tun under Kernel Modules->Network Support
• in Target Images -> select  [ ] ramdisk  --->
• Save and Exit

• Add support for queueing : 
• make kernel_menuconfig 
• Under Networking Support->Networking options->QoS and/or fair queueing select Hierarchical Token Bucket (HTB)
• Save and Exit
•  
• 
   

Build the image

makeV=99

Upgrading the Router
 

1. ssh or telnet the router copy 'openwrt-ar71xx-generic-tl-wr1043nd-v1-squashfs-sysupgrade.bin' file from your development system to your tp-link.

2. populate your /etc/sysupgrade.conf

   add file and directory names where which you want to preserve during upgrade, i have added /etc/config/ only to save my network configurations.

3. sysupgrade -v /tmp/openwrt-ar71xx-generic-tl-wr1043nd-v1-squashfs-sysupgrade.bin

After the upgrade the router will reboot with new image. For more information on upgrade visit here

 

Mounting the USB Flash:

before mounting verify usb kernel support,

lsmod | grep usb

lsmod | grep vfat

lsmod | grep nls

if any of the above are missing you can add them using insmod kmod-fs-fat (example)

if all the above modules are present go ahead

mkdir -p /mnt/usb # directory where Flash should be mounted.

mount -t vfat /dev/sda1 /mnt/usb

ls /mnt/usb # here you should be able to see all the files on flash.

Mounting flash on startup

vi /etc/config/fstab 

config 'mount' 
      option 'device' '/dev/sda1' 
      option 'options' 'rw,sync' 
      option 'enabled_fsck' '0' 
      option 'enabled' '1' 
      option 'target' '/mnt/share'
 
And to make the fstab settings effective in current session run:

/etc/init.d/fstab start

To make the fstab settings effective after every reboot run:

/etc/init.d/fstab enable

start the openflow service...

/etc/init.d/openflow start

root@OpenWrt:~# /etc/init.d/openflow start
eth1.1
Configuring OpenFlow switch for out-of-band control
No need for further configuration for out-of-band control
Jan 25 12:52:24|00001|vlog|INFO|opened log file /var/log/ofprotocol.log
Jan 25 12:52:24|00002|secchan|INFO|OpenFlow reference implementation version 1.0.0
Jan 25 12:52:24|00003|secchan|INFO|OpenFlow protocol version 0x01
Jan 25 12:52:24|00004|secchan|WARN|new management connection will receive asynchronous messages
Jan 25 12:52:24|00005|rconn|INFO|unix:/var/run/dp0.sock: connecting...
Jan 25 12:52:24|00006|rconn|INFO|tcp:192.168.1.2:6633: connecting...
Jan 25 12:52:24|00007|rconn|INFO|unix:/var/run/dp0.sock: connected

root@OpenWrt:~# ps | grep of
3 root 0 SW [ksoftirqd/0]
1355 root 1268 S ofdatapath punix:/var/run/dp0.sock -i eth1.1 --no-lo
1371 root 1068 S ofprotocol unix:/var/run/dp0.sock tcp:192.168.1.2:66
1373 root 1500 S grep of

if you have successfully installed the package, both daemons ofdatapath and pfprotcol must be running.

lets install bro-ids

wget http://sysnet.org.pk/upload/rc_shrimpFiles/openwrt-bro.tar.gz

it will download and install dependencies.

http://www.openflow.org/wk/index.php/OpenFlow_1.0_for_OpenWRT