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Diffstat (limited to 'usr.sbin/i4b/man/i4bipr.4')
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1 files changed, 98 insertions, 0 deletions
diff --git a/usr.sbin/i4b/man/i4bipr.4 b/usr.sbin/i4b/man/i4bipr.4 new file mode 100644 index 0000000..f4cdeac --- /dev/null +++ b/usr.sbin/i4b/man/i4bipr.4 @@ -0,0 +1,98 @@ +.\" +.\" Copyright (c) 1997, 1998 Hellmuth Michaelis. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" $Id: i4bipr.4,v 1.8 1998/12/05 18:06:06 hm Exp $ +.\" +.\" last edit-date: [Sat Dec 5 18:38:34 1998] +.\" +.Dd July 6, 1998 +.Dt i4bipr 4 +.Sh NAME +.Nm i4bipr +.Nd isdn4bsd IP over ISDN B-channel network driver +.Sh FreeBSD SYNOPSIS +.Cd pseudo-device \&"i4bipr\&" Op count +.Sh NetBSD SYNOPSIS +none +.Sh DESCRIPTION +The +.Nm +driver interfaces the IP subsystem of the operating system with the +isdn4bsd package so that transport of IP packets over an ISDN link +is possible. +.Pp +The driver just packs IP packets without anything appended or prepended +into raw HDLC packets on the B channel and transfers them to a remote site. +IP packets received from the remote site are queued into the local IP +protocol stack. +.Pp +The format of the resulting packet on the B channel is: +.Pp +.Dl (HDLC opening flag) (IP-packet) (CRC) (HDLC closing flag) +.Pp +In the case where an IP packet for a remote site arrives in the driver and no +connection has been established yet, the driver communicates with the +.Xr isdnd 8 +daemon to establish a connection. +.Pp +The driver has support for interfacing to the +.Xr bpf 4 +subsystem for using +.Xr tcpdump 1 +with the +.Nm ipr +interfaces. +.Pp +The driver optionally (when compiled with the IPR_VJ option) provides Van +Jacobsen header compression, under control of the link0 and link1 options to +.Xr ifconfig 8 +: +.Pp +.Bl -tag -width 15n -offset indent -compact +.It link0 +Apply VJ compression to outgoing packets on this interface, and assume that +incoming packets require decompression. +.It link1 +Check incoming packets for Van Jacobsen compression; if they appear to be +compressed, automatically set link0. +.El +.Pp +The default values are +.Em on +for +.Em link1 +and +.Em off +for +.Em link0 . +.Sh SEE ALSO +.Xr isdnd 8 +.Xr isdnd.rc 5 +.Xr bpf 4 +.Xr tcpdump 1 +.Sh AUTHOR +The +.Nm +device driver and this manpage were written by Hellmuth Michaelis. He can be +contacted at hm@kts.org. |