b5b75a7d19
based on the existing net/if_spppsubr.c stuff. While there are completely userland (bpf based) implementations available, those have a vastly larger per packet overhead thus causing major CPU overhead and higher latency. On an i386 base router, running a 486DX at 50MHz my line (768kBit/s downstream) was limited to something (varying) between 10 and 20 kByte/s effective download rate. With this implementation I get full bandwidth (~85kByte/s). This is client side only. Arguably the right way to add full PPPoE support (including server side) would be a variation of the ppp line discipline and appropriate modifications to pppd. I promise every help I can give to anyone doing that - but I needed this realy fast. Besids, on low memory NAT boxes with typically a single PPPoE connection, this implementation is more lightweight than a pppd based one, which nicely fits my needs.
83 lines
3.6 KiB
C
83 lines
3.6 KiB
C
/* $NetBSD: dlt.h,v 1.2 2001/04/29 09:50:37 martin Exp $ */
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/*
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* Copyright (c) 1990, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from the Stanford/CMU enet packet filter,
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* (net/enet.c) distributed as part of 4.3BSD, and code contributed
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* to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
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* Berkeley Laboratory.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)bpf.h 8.2 (Berkeley) 1/9/95
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* @(#) Header: bpf.h,v 1.36 97/06/12 14:29:53 leres Exp (LBL)
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*/
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#ifndef _NET_DLT_H_
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#define _NET_DLT_H_
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/*
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* Data-link level type codes.
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*/
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#define DLT_NULL 0 /* no link-layer encapsulation */
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#define DLT_EN10MB 1 /* Ethernet (10Mb) */
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#define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */
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#define DLT_AX25 3 /* Amateur Radio AX.25 */
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#define DLT_PRONET 4 /* Proteon ProNET Token Ring */
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#define DLT_CHAOS 5 /* Chaos */
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#define DLT_IEEE802 6 /* IEEE 802 Networks */
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#define DLT_ARCNET 7 /* ARCNET */
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#define DLT_SLIP 8 /* Serial Line IP */
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#define DLT_PPP 9 /* Point-to-point Protocol */
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#define DLT_FDDI 10 /* FDDI */
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#define DLT_ATM_RFC1483 11 /* LLC/SNAP encapsulated atm */
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#define DLT_RAW 12 /* raw IP */
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#define DLT_SLIP_BSDOS 13 /* BSD/OS Serial Line IP */
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#define DLT_PPP_BSDOS 14 /* BSD/OS Point-to-point Protocol */
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#define DLT_HIPPI 15 /* HIPPI */
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#define DLT_HDLC 16 /* HDLC framing */
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/* NetBSD-specific types */
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#define DLT_PPP_SERIAL 50 /* PPP over serial (async and sync) */
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#define DLT_PPP_ETHER 51 /* XXX - depreceated! PPP over Ethernet; session only, w/o ether header */
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/*
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* NetBSD-specific generic "raw" link type. The upper 16-bits indicate
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* that this is the generic raw type, and the lower 16-bits are the
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* address family we're dealing with.
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*/
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#define DLT_RAWAF_MASK 0x02240000
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#define DLT_RAWAF(af) (DLT_RAWAF_MASK | (af))
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#define DLT_RAWAF_AF(x) ((x) & 0x0000ffff)
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#define DLT_IS_RAWAF(x) (((x) & 0xffff0000) == DLT_RAWAF_MASK)
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#endif /* _NET_DLT_H_ */
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