1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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
29 #include <sys/types.h>
30
31 #include <stdio.h>
32 #include <termios.h>
33
34 #include "layer.h"
35 #include "defs.h"
36 #include "mbuf.h"
37 #include "log.h"
38 #include "sync.h"
39 #include "timer.h"
40 #include "lqr.h"
41 #include "hdlc.h"
42 #include "throughput.h"
43 #include "fsm.h"
44 #include "lcp.h"
45 #include "ccp.h"
46 #include "link.h"
47 #include "async.h"
48 #include "descriptor.h"
49 #include "physical.h"
50
51 static struct mbuf *
sync_LayerPush(struct bundle * bundle __unused,struct link * l __unused,struct mbuf * bp,int pri __unused,u_short * proto __unused)52 sync_LayerPush(struct bundle *bundle __unused, struct link *l __unused,
53 struct mbuf *bp, int pri __unused, u_short *proto __unused)
54 {
55 log_DumpBp(LogSYNC, "Write", bp);
56 m_settype(bp, MB_SYNCOUT);
57 bp->priv = 0;
58 return bp;
59 }
60
61 static struct mbuf *
sync_LayerPull(struct bundle * b __unused,struct link * l,struct mbuf * bp,u_short * proto __unused)62 sync_LayerPull(struct bundle *b __unused, struct link *l, struct mbuf *bp,
63 u_short *proto __unused)
64 {
65 struct physical *p = link2physical(l);
66 int len;
67
68 if (!p)
69 log_Printf(LogERROR, "Can't Pull a sync packet from a logical link\n");
70 else {
71 log_DumpBp(LogSYNC, "Read", bp);
72
73 /* Either done here or by the HDLC layer */
74 len = m_length(bp);
75 p->hdlc.lqm.ifInOctets += len + 1; /* plus 1 flag octet! */
76 p->hdlc.lqm.lqr.InGoodOctets += len + 1; /* plus 1 flag octet! */
77 p->hdlc.lqm.ifInUniPackets++;
78 m_settype(bp, MB_SYNCIN);
79 }
80
81 return bp;
82 }
83
84 struct layer synclayer = { LAYER_SYNC, "sync", sync_LayerPush, sync_LayerPull };
85