summaryrefslogtreecommitdiffstats
path: root/usr.sbin/ppp/async.c
diff options
context:
space:
mode:
Diffstat (limited to 'usr.sbin/ppp/async.c')
-rw-r--r--usr.sbin/ppp/async.c220
1 files changed, 0 insertions, 220 deletions
diff --git a/usr.sbin/ppp/async.c b/usr.sbin/ppp/async.c
deleted file mode 100644
index a2a8e04..0000000
--- a/usr.sbin/ppp/async.c
+++ /dev/null
@@ -1,220 +0,0 @@
-/*-
- * 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 };
OpenPOWER on IntegriCloud