xref: /freebsd/usr.sbin/ppp/sync.c (revision 7ef62cebc2f965b0f640263e179276928885e33d)
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  * $FreeBSD$
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 
53 static struct mbuf *
54 sync_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 
63 static struct mbuf *
64 sync_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 
86 struct layer synclayer = { LAYER_SYNC, "sync", sync_LayerPush, sync_LayerPull };
87