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      1 /*-
      2  * Copyright (c) 1999 Brian Somers <brian (at) Awfulhak.org>
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     24  * SUCH DAMAGE.
     25  *
     26  * $FreeBSD: src/usr.sbin/ppp/sync.c,v 1.8.26.1 2010/12/21 17:10:29 kensmith Exp $
     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 *
     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 *
     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