100 lines
3 KiB
Markdown
100 lines
3 KiB
Markdown
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This README contains information how to establish an IPv6 connecton between
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Linux BLE router and an IPSP enabled BLE device.
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Prerequisites
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=============
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In general, any device capable of running Linux operating system, can be used
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as a BLE router provided the following conditions are met:
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* Linux Kernel >3.18 is used
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* bluez, libcap-ng0, radvd tools are present.
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If a built-in Bluetooth device is not available then Bluetooth 4.0 compatible
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USB dongle can be used.
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The following procedures have been tested on Ubuntu 15.10.
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Establishing an IPv6 connection
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===============================
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Use the following procedure to establish a connection between an nRF52 device
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and Linux router:
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First enable 6LoWPAN module. This is neccessary only once per session:
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# Log in as a root user.
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sudo su
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# Mount debugfs file system.
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mount -t debugfs none /sys/kernel/debug
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# Load 6LoWPAN module.
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modprobe bluetooth_6lowpan
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# Enable the bluetooth 6lowpan module.
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echo 1 > /sys/kernel/debug/bluetooth/6lowpan_enable
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# Look for available HCI devices.
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hciconfig
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# Reset HCI device - for example hci0 device.
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hciconfig hci0 reset
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# Read 00:AA:BB:XX:YY:ZZ address of the nRF5x device.
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hcitool lescan
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If you see device name and address in lescan output then you can connect to the
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device:
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echo "connect 00:AA:BB:XX:YY:ZZ 1" > /sys/kernel/debug/bluetooth/6lowpan_control
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If above is successful then LED1 will stop blinking and LED2 will switch on.
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You can then check the connection using the following commands:
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# Check if bt0 interface is present and up
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ifconfig
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# Try to ping the device using its link-local address, for example, on bt0 interface.
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ping6 -I bt0 fe80::2aa:bbff:fexx:yyzz
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If you'd like to learn more about the procedure please refer to
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[Connecting devices to the router].
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Distributing routable IPv6 prefix
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=================================
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In Linux, Router Advertisement Daemon (RADVD) can be used to distribute prefixes
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in the network, hance configure routable IPv6 address.
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To configure RADVD create `/etc/radvd.conf` file and paste the following contents:
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interface bt0
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{
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AdvSendAdvert on;
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prefix 2001:db8::/64
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{
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AdvOnLink off;
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AdvAutonomous on;
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AdvRouterAddr on;
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};
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};
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Next, start RADVD daemon:
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# Set IPv6 forwarding (must be present).
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sudo echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
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# Run radvd daemon.
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sudo service radvd restart
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If successfull then all devices connected to the host will receive
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a routable `2001:db8` prefix.
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This can be verified by sending echo request to the full address:
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ping6 -I bt0 2001:db8::2aa:bbff:fexx:yyzz
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where `aa:bbff:fexx:yyzz` is device Bluetooth address.
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If you'd like to learn more about the procedure please refer to
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[Distributing a global IPv6 prefix].
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* [Connecting devices to the router]: http://developer.nordicsemi.com/nRF5_IoT_SDK/doc/0.9.0/html/a00089.html
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* [Distributing a global IPv6 prefix]: http://developer.nordicsemi.com/nRF5_IoT_SDK/doc/0.9.0/html/a00090.html
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