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📄 Makefile(1.66 KB)
📄 Makefile.depend(435 B)
📄 README.changes(7.26 KB)
📄 README.nat(14.85 KB)
📄 acf.c(3.51 KB)
📄 acf.h(1.5 KB)
📄 arp.c(8.24 KB)
📄 arp.h(1.76 KB)
📄 async.c(5.39 KB)
📄 async.h(1.9 KB)
📄 auth.c(12.02 KB)
📄 auth.h(2.69 KB)
📄 bundle.c(56.37 KB)
📄 bundle.h(7.7 KB)
📄 cbcp.c(22.53 KB)
📄 cbcp.h(2.51 KB)
📄 ccp.c(23.33 KB)
📄 ccp.h(5.53 KB)
📄 chap.c(27 KB)
📄 chap.h(2.69 KB)
📄 chap_ms.c(12.22 KB)
📄 chap_ms.h(2.48 KB)
📄 chat.c(20.41 KB)
📄 chat.h(2.92 KB)
📄 command.c(101.76 KB)
📄 command.h(3.02 KB)
📄 datalink.c(42.89 KB)
📄 datalink.h(6.11 KB)
📄 deflate.c(15.89 KB)
📄 deflate.h(1.52 KB)
📄 defs.c(8.61 KB)
📄 defs.h(5.41 KB)
📄 descriptor.h(2.24 KB)
📄 ether.c(20.81 KB)
📄 ether.h(1.73 KB)
📄 exec.c(11.47 KB)
📄 exec.h(1.67 KB)
📄 filter.c(15.76 KB)
📄 filter.h(3.8 KB)
📄 fsm.c(31.01 KB)
📄 fsm.h(7.02 KB)
📄 hdlc.c(15.17 KB)
📄 hdlc.h(3.9 KB)
📄 i4b.h(1.73 KB)
📄 id.c(6.05 KB)
📄 id.h(3.01 KB)
📄 iface.c(22.41 KB)
📄 iface.h(2.97 KB)
📄 ip.c(30.21 KB)
📄 ip.h(2.09 KB)
📄 ipcp.c(42.99 KB)
📄 ipcp.h(5.14 KB)
📄 iplist.c(5.54 KB)
📄 iplist.h(1.99 KB)
📄 ipv6cp.c(21.9 KB)
📄 ipv6cp.h(3.26 KB)
📄 layer.h(1.97 KB)
📄 lcp.c(39.22 KB)
📄 lcp.h(6.3 KB)
📄 link.c(10.36 KB)
📄 link.h(3.42 KB)
📄 log.c(11.33 KB)
📄 log.h(4.14 KB)
📄 lqr.c(17.5 KB)
📄 lqr.h(3.31 KB)
📄 main.c(17.93 KB)
📄 main.h(1.6 KB)
📄 mbuf.c(10.02 KB)
📄 mbuf.h(4 KB)
📄 mp.c(33.66 KB)
📄 mp.h(4.87 KB)
📄 mppe.c(20.27 KB)
📄 mppe.h(1.57 KB)
📄 nat_cmd.c(15.37 KB)
📄 nat_cmd.h(1.88 KB)
📄 ncp.c(13.17 KB)
📄 ncp.h(4.36 KB)
📄 ncpaddr.c(23.06 KB)
📄 ncpaddr.h(4.63 KB)
📄 netgraph.c(20.65 KB)
📄 netgraph.h(1.72 KB)
📄 pap.c(8.83 KB)
📄 pap.h(1.78 KB)
📄 physical.c(29.01 KB)
📄 physical.h(6.5 KB)
📄 ppp.8(149.48 KB)
📄 ppp.conf(1.23 KB)
📄 pred.c(8.83 KB)
📄 pred.h(1.59 KB)
📄 probe.c(2.29 KB)
📄 probe.h(1.57 KB)
📄 prompt.c(12.92 KB)
📄 prompt.h(3.87 KB)
📄 proto.c(3.22 KB)
📄 proto.h(2.4 KB)
📄 radius.c(39.38 KB)
📄 radius.h(4.6 KB)
📄 route.c(25.91 KB)
📄 route.h(3.3 KB)
📄 server.c(10.9 KB)
📄 server.h(2.26 KB)
📄 sig.c(3.45 KB)
📄 sig.h(1.6 KB)
📄 slcompress.c(17.2 KB)
📄 slcompress.h(6.48 KB)
📄 sync.c(2.7 KB)
📄 sync.h(1.44 KB)
📄 systems.c(11.45 KB)
📄 systems.h(2.02 KB)
📄 tcp.c(5.63 KB)
📄 tcp.h(1.66 KB)
📄 tcpmss.c(5.06 KB)
📄 tcpmss.h(1.44 KB)
📄 throughput.c(8.84 KB)
📄 throughput.h(2.91 KB)
📄 timer.c(8.14 KB)
📄 timer.h(2.31 KB)
📄 tty.c(20.63 KB)
📄 tty.h(1.73 KB)
📄 tun.c(3.27 KB)
📄 tun.h(1.58 KB)
📄 ua.h(2.98 KB)
📄 udp.c(8.7 KB)
📄 udp.h(1.67 KB)
📄 vjcomp.c(5.68 KB)
📄 vjcomp.h(1.53 KB)

Editing: async.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
 *          based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
 *                           Internet Initiative Japan, Inc (IIJ)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/types.h>

#include <string.h>
#include <termios.h>

#include "layer.h"
#include "mbuf.h"
#include "log.h"
#include "defs.h"
#include "timer.h"
#include "fsm.h"
#include "lqr.h"
#include "hdlc.h"
#include "lcp.h"
#include "proto.h"
#include "async.h"
#include "throughput.h"
#include "ccp.h"
#include "link.h"
#include "descriptor.h"
#include "physical.h"

#define MODE_HUNT 0x01
#define MODE_ESC  0x02

void
async_Init(struct async *async)
{
  async_Setup(async);
  memset(async->cfg.EscMap, '\0', sizeof async->cfg.EscMap);
}

void
async_Setup(struct async *async)
{
  async->mode = MODE_HUNT;
  async->length = 0;
  async->my_accmap = async->his_accmap = 0xffffffff;
}

void
async_SetLinkParams(struct async *async, u_int32_t mymap, u_int32_t hismap)
{
  async->my_accmap = mymap;
  async->his_accmap = hismap | mymap;
}

/*
 * Encode into async HDLC byte code
 */
static void
async_Encode(struct async *async, u_char **cp, u_char c, int proto)
{
  u_char *wp;

wp = *cp;
  if ((c < 0x20 && (proto == PROTO_LCP || (async->his_accmap & (1 << c))))
      || (c == HDLC_ESC) || (c == HDLC_SYN)) {
    *wp++ = HDLC_ESC;
    c ^= HDLC_XOR;
  }
  if (async->cfg.EscMap[32] && async->cfg.EscMap[c >> 3] & (1 << (c & 7))) {
    *wp++ = HDLC_ESC;
    c ^= HDLC_XOR;
  }
  *wp++ = c;
  *cp = wp;
}

static struct mbuf *
async_LayerPush(struct bundle *b __unused, struct link *l, struct mbuf *bp,
                int pri __unused, u_short *proto)
{
  struct physical *p = link2physical(l);
  u_char *cp, *sp, *ep;
  struct mbuf *wp;
  size_t oldcnt;
  size_t cnt;

if (!p || m_length(bp) > HDLCSIZE) {
    m_freem(bp);
    return NULL;
  }

oldcnt = m_length(bp);

cp = p->async.xbuff;
  ep = cp + HDLCSIZE - 10;
  wp = bp;
  *cp++ = HDLC_SYN;
  while (wp) {
    sp = MBUF_CTOP(wp);
    for (cnt = wp->m_len; cnt > 0; cnt--) {
      async_Encode(&p->async, &cp, *sp++, *proto);
      if (cp >= ep) {
	m_freem(bp);
	return NULL;
      }
    }
    wp = wp->m_next;
  }
  *cp++ = HDLC_SYN;

cnt = cp - p->async.xbuff;
  m_freem(bp);
  bp = m_get(cnt, MB_ASYNCOUT);
  memcpy(MBUF_CTOP(bp), p->async.xbuff, cnt);
  bp->priv = cnt - oldcnt;
  log_DumpBp(LogASYNC, "Write", bp);

return bp;
}

static struct mbuf *
async_Decode(struct async *async, u_char c)
{
  struct mbuf *bp;

if ((async->mode & MODE_HUNT) && c != HDLC_SYN)
    return NULL;

switch (c) {
  case HDLC_SYN:
    async->mode &= ~MODE_HUNT;
    if (async->length) {		/* packet is ready. */
      bp = m_get(async->length, MB_ASYNCIN);
      mbuf_Write(bp, async->hbuff, async->length);
      async->length = 0;
      return bp;
    }
    break;
  case HDLC_ESC:
    if (!(async->mode & MODE_ESC)) {
      async->mode |= MODE_ESC;
      break;
    }
    /* FALLTHROUGH */
  default:
    if (async->length >= HDLCSIZE) {
      /* packet is too large, discard it */
      log_Printf(LogWARN, "Packet too large (%d), discarding.\n",
                 async->length);
      async->length = 0;
      async->mode = MODE_HUNT;
      break;
    }
    if (async->mode & MODE_ESC) {
      c ^= HDLC_XOR;
      async->mode &= ~MODE_ESC;
    }
    async->hbuff[async->length++] = c;
    break;
  }
  return NULL;
}

static struct mbuf *
async_LayerPull(struct bundle *b __unused, struct link *l, struct mbuf *bp,
                u_short *proto __unused)
{
  struct mbuf *nbp, **last;
  struct physical *p = link2physical(l);
  u_char *ch;
  size_t cnt;

if (!p) {
    log_Printf(LogERROR, "Can't Pull an async packet from a logical link\n");
    return bp;
  }

last = &nbp;

log_DumpBp(LogASYNC, "Read", bp);
  while (bp) {
    ch = MBUF_CTOP(bp);
    for (cnt = bp->m_len; cnt; cnt--) {
      *last = async_Decode(&p->async, *ch++);
      if (*last != NULL)
        last = &(*last)->m_nextpkt;
    }
    bp = m_free(bp);
  }

return nbp;
}

struct layer asynclayer =
  { LAYER_ASYNC, "async", async_LayerPush, async_LayerPull };

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Editing: async.c

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