355 lines
9.1 KiB
Groff
355 lines
9.1 KiB
Groff
.\" Copyright (c) 2001-2003 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id: rfcomm_pppd.8,v 1.7 2003/09/07 18:32:11 max Exp $
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.\" $FreeBSD$
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.\"
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.Dd February 4, 2003
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.Dt RFCOMM_PPPD 8
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.Os
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.Sh NAME
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.Nm rfcomm_pppd
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.Nd RFCOMM PPP daemon
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.Sh SYNOPSIS
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.Nm
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.Fl c
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.Op Fl dh
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.Fl a Ar address
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.Fl C Ar channel
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.Fl l Ar label
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.Fl u Ar N
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.Nm
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.Fl s
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.Op Fl dDhS
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.Op Fl a Ar address
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.Fl C Ar channel
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.Fl l Ar label
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.Sh DESCRIPTION
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The
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.Nm
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daemon is a simple wrapper daemon that allows the use of
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.Xr ppp 8
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via an RFCOMM connection.
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It can operate in two modes: client and server.
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.Pp
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In client mode,
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.Nm
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opens an RFCOMM connection to the specified server's
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.Ar BD_ADRR
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and
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.Ar channel .
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Once the RFCOMM connection is established,
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.Nm
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executes
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.Xr ppp 8
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in
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.Fl direct
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mode with the specified
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.Ar label .
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Likewise,
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.Xr ppp 8
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operates over the RFCOMM connection just like it would over a standard serial
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port, thus allowing a user to
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.Dq "dial out"
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and connect to the Internet.
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.Pp
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In server mode,
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.Nm
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opens an RFCOMM socket and listens for incoming connections from remote clients.
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Once the new incoming connection is accepted,
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.Nm
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forks and executes
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.Xr ppp 8
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in
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.Fl direct
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mode with the specified
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.Ar label .
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Likewise,
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.Xr ppp 8
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operates over the RFCOMM connection just like it would over a standard serial
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port, thus providing network connectivity to remote clients.
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.Pp
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The options are as follows:
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.Bl -tag -width indent
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.It Fl a Ar address
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In client mode, this required option specifies the address of the remote
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RFCOMM server.
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In server mode, this option can be used to specify the local
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address to listen on.
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By default, in server mode, the daemon will listen on
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.Dv ANY
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address.
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The address can be specified as BD_ADDR or name.
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If a name was specified, the
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.Nm
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utility will attempt to resolve the name via
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.Xr bt_gethostbyname 3 .
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.It Fl C Ar channel
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In both client and server mode, this required option specifies the RFCOMM
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channel to connect to or listen on.
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In server mode, the channel should be a number between 1 and 30.
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In client mode, the channel could either be a number between 1 and 30
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or a service name.
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Supported service names are:
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.Cm DUN
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(Dial-Up Networking) and
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.Cm LAN
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(LAN Access Using PPP).
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If a service name is used instead of a numeric channel number, then
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.Nm
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will try to obtain an RFCOMM channel number via SDP
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(Service Discovery Protocol).
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.It Fl c
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Act as an RFCOMM client.
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This is the default mode.
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.It Fl d
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Do not detach from the controlling terminal, i.e., run in foreground.
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.It Fl D
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In server mode, register the
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.Cm DUN
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(Dial-Up Networking) service in addition to the
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.Cm LAN
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(LAN Access Using PPP) service.
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AT-command exchange can be faked with
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.Xr ppp 8
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chat script.
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.It Fl h
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Display usage message and exit.
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.It Fl l Ar label
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In both client and server mode, this required option specifies which
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.Xr ppp 8
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label will be used.
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.It Fl S
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In server mode, register the
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.Cm SP
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(Serial Port) service in addition to the
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.Cm LAN
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(LAN Access Using PPP) service.
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.Pp
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It appears that some cell phones are using the so-called
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.Dq "callback mechanism" .
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In this scenario, the user is trying to connect his cell phone to the Internet,
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while the user's host computer is acting as the gateway server.
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It seems that it is not possible to tell the phone to just connect and start
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using the
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.Cm LAN
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service.
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Instead, the user's host computer must
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.Dq "jump start"
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the phone by connecting to the phone's
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.Cm SP
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service.
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What happens next is the phone kills the existing connection and opens another
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connection back to the user's host computer.
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The phone really wants to use the
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.Cm LAN
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service, but for whatever reason it looks for the
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.Cm SP
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service on the user's host computer.
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This brain-damaged behavior was reported for the Nokia 6600 and the
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Sony/Ericsson P900.
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.It Fl s
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Act as an RFCOMM server.
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.It Fl u Ar N
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This option maps directly to the
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.Fl unit
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.Xr ppp 8
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command-line option and tells
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.Nm
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to instruct
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.Xr ppp 8
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to only attempt to open
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.Pa /dev/tun Ns Ar N .
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This option only works in client mode.
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.El
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.Sh PPP CONFIGURATION
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.Ss Important Notes on PPP Configuration
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Special attention is required when adding new RFCOMM configurations to the
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existing PPP configuration.
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Please keep in mind that PPP will
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.Em always
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execute commands in the
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.Dq Li default
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label of your
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.Pa /etc/ppp/ppp.conf
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file.
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Please make sure that the
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.Dq Li default
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label
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.Em only
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contains commands that apply to
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.Em every
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other label.
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If you need to use PPP for both dialing out and accepting incoming
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RFCOMM connections, please make sure you have moved all commands related to
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dialing out from the
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.Dq Li default
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section into an appropriate outgoing label.
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.Ss RFCOMM Server
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One of the typical examples is the LAN access.
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In this example, an RFCOMM connection
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is used as a null-modem connection between a client and a server.
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Both client and server will start talking PPP right after the RFCOMM
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connection has been established.
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.Bd -literal -offset indent
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rfcomm-server:
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set timeout 0
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set lqrperiod 10
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set ifaddr 10.0.0.1 10.0.0.2 255.255.255.0
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enable lqr
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accept lqr
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accept dns
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# Do not use PPP authentication. Assume that
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# Bluetooth connection was authenticated already
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disable pap
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deny pap
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disable chap
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deny chap
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.Ed
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.Ss RFCOMM Client
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The
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.Nm
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utility supports both
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.Cm LAN
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(LAN Access Using PPP) and
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.Cm DUN
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(Dial-Up Networking) access.
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The client's configuration for
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.Cm LAN
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access is very similar to the server's and might look like this:
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.Bd -literal -offset indent
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rfcomm-client:
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enable lqr
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accept lqr
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set dial
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set timeout 0
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disable iface-alias
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set ifaddr 10.0.0.1/0 10.0.0.2/0 255.255.255.0 0.0.0.0
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# Do not use PPP authentication. Assume that
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# Bluetooth connection was authenticated already
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deny pap
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disable pap
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deny chap
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disable chap
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.Ed
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.Pp
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The client's configuration for
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.Cm DUN
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access is different.
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In this scenario, the client gets connected to the virtual serial port on the
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server.
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To open a PPP session, the client must dial a number.
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Note that by default
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.Xr ppp 8
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will not execute any configured chat scripts.
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The
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.Ic force-scripts
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option can be used to override this behavior.
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An example configuration is shown below:
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.Bd -literal -offset indent
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rfcomm-dialup:
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# This is IMPORTANT option
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enable force-scripts
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# You might want to change these
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set authname
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set authkey
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set phone "*99***1#"
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# You might want to adjust dial string as well
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set dial "ABORT BUSY ABORT NO\\\\sCARRIER TIMEOUT 5 \\
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\\"\\" AT OK-AT-OK ATE1Q0 OK \\\\dATDT\\\\T TIMEOUT 40 CONNECT"
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set login
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set timeout 30
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enable dns
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resolv rewrite
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set ifaddr 10.0.0.1/0 10.0.0.2/0 255.255.255.0 0.0.0.0
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add default HISADDR
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.Ed
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.Pp
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Note that by adjusting the initialization string, one can make a CSD (Circuit
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Switched Data), HSCSD (High Speed Circuit Switched Data) or GPRS (General
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Packet Radio Service) connection.
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The availability of the particular connection
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type depends on the phone model and service plan activated on the phone.
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.Sh EXIT STATUS
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.Ex -std
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.Sh EXAMPLES
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.Dl "rfcomm_pppd -s -a 00:01:02:03:04:05 -C 1 -l rfcomm-server"
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.Pp
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This command will start
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.Nm
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in the server mode.
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The RFCOMM server will listen on local address
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.Li 00:01:02:03:04:05
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and channel
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.Li 1 .
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Once the incoming connection has been accepted,
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.Nm
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will execute
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.Xr ppp 8
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in
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.Fl direct
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mode with the
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.Dq Li rfcomm-server
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label.
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.Pp
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.Dl "rfcomm_pppd -c -a 00:01:02:03:04:05 -C 1 -l rfcomm-client"
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.Pp
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This command will start
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.Nm
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in the client mode.
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.Nm
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will try to connect to the RFCOMM server at
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.Li 00:01:02:03:04:05
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address and channel
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.Li 1 .
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Once connected,
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.Nm
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will execute
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.Xr ppp 8
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in
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.Fl direct
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mode with the
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.Dq Li rfcomm-client
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label.
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.Sh SEE ALSO
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.Xr rfcomm_sppd 1 ,
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.Xr bluetooth 3 ,
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.Xr ng_btsocket 4 ,
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.Xr ppp 8 ,
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.Xr sdpcontrol 8 ,
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.Xr sdpd 8
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.Sh AUTHORS
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.An Maksim Yevmenkin Aq Mt m_evmenkin@yahoo.com
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.Sh CAVEATS
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The
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.Nm
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utility in server mode will try to register the Bluetooth LAN Access Over PPP
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service with the local SDP daemon.
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If the local SDP daemon is not running,
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.Nm
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will exit with an error.
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