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Wed Sep 9 14:28:56 2020 UTC (4 months, 2 weeks ago) by kim
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#  Requirements 

You will need a mobile phone with GPRS and Bluetooth, a Bluetooth device and a NetBSD system that supports Bluetooth (4.0 and above). 

In this example, we are using a Nokia 6230i phone, a Broadcom USB dongle and NetBSD 4.9.11. 

#  Setting up pppd 

We need to create some pppd options and chat scripts, first create the directories 
      # mkdir -p /etc/ppp/peers

Create a /etc/ppp/options file containing 
      # default options file for [[!template id=man name="pppd" section="8"]]

and a /etc/ppp/chat.gsm file containing 
      #  Chat script to dial out with GSM phone
      ABORT     "BUSY"
      ABORT     "NO CARRIER"
      ABORT     "DELAYED"
      ABORT     "VOICE"
      TIMEOUT   10
      ""        AT
      OK-AT-OK  AT&F
      OK        AT+CGDCONT=1,"IP","\U"
      TIMEOUT   60
      OK        ATDT\T
      CONNECT   \c

Create a /etc/ppp/peers/gprs file containing 
      # pppd(8) options file for GPRS
      # The Access Point Name (APN) used by your GSM Operator may need
      # to be different from the "internet" used below.
      pty "rfcomm_sppd -a phone -d ubt0 -s DUN -m encrypt"
      connect "/usr/sbin/chat -V -f /etc/ppp/chat.gsm -U internet -T *99#"

##  Configuring Bluetooth 

First, activate Bluetooth on your phone, on the Nokia 6230i as follows 
      Menu > Settings > Connectivity > Bluetooth > Bluetooth settings > My phone's name
      Choose a name for your device, for this example I will use "My Nokia"
      Menu > Settings > Connectivity > Bluetooth > Bluetooth settings > My phone's visbility
      Choose "Shown to all"
      Menu > Settings > Connectivity > Bluetooth > Bluetooth >
      Choose "Bluetooth on"

Plug your Bluetooth dongle into your computer and you should see something like the following on the console 
      ubt0 at uhub0 port 1 configuration 1 interface 0
      ubt0: Broadcom BCM92035DGROM, rev 1.10/0.04, addr 2

Now, we need to establish a Bluetooth connection between your phone and computer. Enable the Bluetooth dongle 
      # /etc/rc.d/bluetooth start
      Configuring Bluetooth controllers: ubt0.
      starting Bluetooth Link Key/PIN Code manager
      starting Bluetooth Service Discovery server

and perform an inquiry to discover the Bluetooth device address of your phone 
      # btconfig ubt0 inquiry
      Device Discovery from device ubt0 ..... 1 response
       1: bdaddr 00:22:b3:22:3e:32
        : name "My Nokia"

Add an alias of the bdaddr (yours will be different) to /etc/bluetooth/hosts 
      # echo "00:22:b3:22:3e:32 phone" >> /etc/bluetooth/hosts

Next set up a PIN in order to pair the phone with your Bluetooth dongle 
      # btpin -a phone -r -l 6
      PIN: 928434

and attempt to open a manual RFCOMM connection to the Dial Up Networking (DUN) service on the phone (press ^C to close the connection) 
      # rfcomm_sppd -a phone -s DUN
      Starting on stdio...
      Nokia 6230i

Your phone should prompt you for accepting the connection from your computer, accept it and enter the PIN that btpin generated to complete the pairing process. 

Now we can start pppd 
      # pppd call gprs
      Serial connection established.
      Connect:  ppp0 <--> /dev/ttyp9
      local     IP address
      Remote    IP address
      Primary   DNS address IP
      Secondary DNS address IP

You are now online. To terminate your pppd session just press Control + C, or send a SIGHUP to the pppd process. 

#  Advanced Configuration 

You may find that some phones require authentication when connecting to PPP, this will be a username/password provided by your GSM Operator. 

Create a /etc/ppp/chap-secrets file, owned by root and unreadable by anybody else (mode 0600) containing 
      # CHAP/PAP secrets file
      "user" * "pass"

and add the following line to the /etc/ppp/peers/gprs file 
       user "user"

To automatically configure the DNS server when the PPP link is brought up, create a /etc/ppp/ip-up file containing 
      # ip-up <interface> <tty> <speed> <local-ip> <remote-ip> <ipparam>
      #            $1      $2      $3       $4         $5          $6
      if [ -f /etc/ppp/resolv.conf ]; then
          rm -f /etc/resolv.conf
          mv /etc/ppp/resolv.conf /etc/resolv.conf

#  See Also 

The [Bluetooth section in the NetBSD Guide]( contains more general Bluetooth configuration, and details of all PPP options can be found in the [[!template id=man name="pppd" section="8"]] manpage. 

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