Commit 72364706 authored by Krzysztof Hałasa's avatar Krzysztof Hałasa
Browse files

WAN: syncppp.c is no longer used by any kernel code. Remove it.

Signed-off-by: default avatarKrzysztof Hałasa <>
parent e022c2f0
......@@ -6,7 +6,7 @@
# To add a new book the only step required is to add the book to the
# list of DOCBOOKS.
DOCBOOKS := wanbook.xml z8530book.xml mcabook.xml \
DOCBOOKS := z8530book.xml mcabook.xml \
kernel-hacking.xml kernel-locking.xml deviceiobook.xml \
procfs-guide.xml writing_usb_driver.xml networking.xml \
kernel-api.xml filesystems.xml lsm.xml usb.xml kgdb.xml \
......@@ -98,9 +98,6 @@
<sect1><title>Synchronous PPP</title>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"" []>
<book id="WANGuide">
<title>Synchronous PPP and Cisco HDLC Programming Guide</title>
<holder>Alan Cox</holder>
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
For more details see the file COPYING in the source
distribution of Linux.
<chapter id="intro">
The syncppp drivers in Linux provide a fairly complete
implementation of Cisco HDLC and a minimal implementation of
PPP. The longer term goal is to switch the PPP layer to the
generic PPP interface that is new in Linux 2.3.x. The API should
remain unchanged when this is done, but support will then be
available for IPX, compression and other PPP features
<chapter id="bugs">
<title>Known Bugs And Assumptions</title>
<varlistentry><term>PPP is minimal</term>
The current PPP implementation is very basic, although sufficient
for most wan usages.
<varlistentry><term>Cisco HDLC Quirks</term>
Currently we do not end all packets with the correct Cisco multicast
or unicast flags. Nothing appears to mind too much but this should
be corrected.
<chapter id="pubfunctions">
<title>Public Functions Provided</title>
This diff is collapsed.
* Defines for synchronous PPP/Cisco link level subroutines.
* Copyright (C) 1994 Cronyx Ltd.
* Author: Serge Vakulenko, <>
* This software is distributed with NO WARRANTIES, not even the implied
* Authors grant any other persons or organizations permission to use
* or modify this software as long as this message is kept with the software,
* all derivative works or modified versions.
* Version 1.7, Wed Jun 7 22:12:02 MSD 1995
#ifndef _SYNCPPP_H_
#define _SYNCPPP_H_ 1
#ifdef __KERNEL__
struct slcp {
u16 state; /* state machine */
u32 magic; /* local magic number */
u_char echoid; /* id of last keepalive echo request */
u_char confid; /* id of last configuration request */
struct sipcp {
u16 state; /* state machine */
u_char confid; /* id of last configuration request */
struct sppp
struct sppp * pp_next; /* next interface in keepalive list */
u32 pp_flags; /* use Cisco protocol instead of PPP */
u16 pp_alivecnt; /* keepalive packets counter */
u16 pp_loopcnt; /* loopback detection counter */
u32 pp_seq; /* local sequence number */
u32 pp_rseq; /* remote sequence number */
struct slcp lcp; /* LCP params */
struct sipcp ipcp; /* IPCP params */
struct timer_list pp_timer;
struct net_device *pp_if;
char pp_link_state; /* Link status */
spinlock_t lock;
struct ppp_device
struct net_device *dev; /* Network device pointer */
struct sppp sppp; /* Synchronous PPP */
static inline struct sppp *sppp_of(struct net_device *dev)
struct ppp_device **ppp = dev->ml_priv;
BUG_ON((*ppp)->dev != dev);
return &(*ppp)->sppp;
#define PP_KEEPALIVE 0x01 /* use keepalive protocol */
#define PP_CISCO 0x02 /* use Cisco protocol instead of PPP */
#define PP_TIMO 0x04 /* cp_timeout routine active */
#define PP_DEBUG 0x08
#define PPP_MTU 1500 /* max. transmit unit */
#define LCP_STATE_CLOSED 0 /* LCP state: closed (conf-req sent) */
#define LCP_STATE_ACK_RCVD 1 /* LCP state: conf-ack received */
#define LCP_STATE_ACK_SENT 2 /* LCP state: conf-ack sent */
#define LCP_STATE_OPENED 3 /* LCP state: opened */
#define IPCP_STATE_CLOSED 0 /* IPCP state: closed (conf-req sent) */
#define IPCP_STATE_ACK_RCVD 1 /* IPCP state: conf-ack received */
#define IPCP_STATE_ACK_SENT 2 /* IPCP state: conf-ack sent */
#define IPCP_STATE_OPENED 3 /* IPCP state: opened */
#define SPPP_LINK_DOWN 0 /* link down - no keepalive */
#define SPPP_LINK_UP 1 /* link is up - keepalive ok */
void sppp_attach (struct ppp_device *pd);
void sppp_detach (struct net_device *dev);
int sppp_do_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
struct sk_buff *sppp_dequeue (struct net_device *dev);
int sppp_isempty (struct net_device *dev);
void sppp_flush (struct net_device *dev);
int sppp_open (struct net_device *dev);
int sppp_reopen (struct net_device *dev);
int sppp_close (struct net_device *dev);
#endif /* _SYNCPPP_H_ */
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