sync.c revision 330449 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: stable/11/usr.sbin/ppp/sync.c 330449 2018-03-05 07:26:05Z eadler $
29 */
30
31#include <sys/types.h>
32
33#include <stdio.h>
34#include <termios.h>
35
36#include "layer.h"
37#include "defs.h"
38#include "mbuf.h"
39#include "log.h"
40#include "sync.h"
41#include "timer.h"
42#include "lqr.h"
43#include "hdlc.h"
44#include "throughput.h"
45#include "fsm.h"
46#include "lcp.h"
47#include "ccp.h"
48#include "link.h"
49#include "async.h"
50#include "descriptor.h"
51#include "physical.h"
52
53static struct mbuf *
54sync_LayerPush(struct bundle *bundle __unused, struct link *l __unused,
55	       struct mbuf *bp, int pri __unused, u_short *proto __unused)
56{
57  log_DumpBp(LogSYNC, "Write", bp);
58  m_settype(bp, MB_SYNCOUT);
59  bp->priv = 0;
60  return bp;
61}
62
63static struct mbuf *
64sync_LayerPull(struct bundle *b __unused, struct link *l, struct mbuf *bp,
65               u_short *proto __unused)
66{
67  struct physical *p = link2physical(l);
68  int len;
69
70  if (!p)
71    log_Printf(LogERROR, "Can't Pull a sync packet from a logical link\n");
72  else {
73    log_DumpBp(LogSYNC, "Read", bp);
74
75    /* Either done here or by the HDLC layer */
76    len = m_length(bp);
77    p->hdlc.lqm.ifInOctets += len + 1;		/* plus 1 flag octet! */
78    p->hdlc.lqm.lqr.InGoodOctets += len + 1;	/* plus 1 flag octet! */
79    p->hdlc.lqm.ifInUniPackets++;
80    m_settype(bp, MB_SYNCIN);
81  }
82
83  return bp;
84}
85
86struct layer synclayer = { LAYER_SYNC, "sync", sync_LayerPush, sync_LayerPull };
87