usr.sbin/ppp/sync.c

   1 /*-
   2  * Copyright (c) 1999 Brian Somers <brian@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 1.6 1999/12/20 20:29:47 brian Exp $
  27  * $DragonFly: src/usr.sbin/ppp/sync.c,v 1.3 2008/05/19 10:19:49 corecode Exp $
  28  */
  29
  30 #include <sys/types.h>
  31 #include <sys/select.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, struct mbuf *bp,
  55                 int pri __unused, u_short *proto __unused)
  56 {
  57   log_DumpBp(LogSYNC, "Write", bp);
  58   m_settype(bp, MB_SYNCOUT);
  59   return bp;
  60 }
  61
  62 static struct mbuf *
  63 sync_LayerPull(struct bundle *b __unused, struct link *l, struct mbuf *bp,
  64                u_short *proto __unused)
  65 {
  66   struct physical *p = link2physical(l);
  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     p->hdlc.lqm.SaveInOctets += m_length(bp) + 1;
  75     p->hdlc.lqm.SaveInPackets++;
  76     m_settype(bp, MB_SYNCIN);
  77   }
  78
  79   return bp;
  80 }
  81
  82 struct layer synclayer = { LAYER_SYNC, "sync", sync_LayerPush, sync_LayerPull };