/*
* ppp_comp.c - STREAMS module for kernel-level compression and CCP support.
*
- * Copyright (c) 1994 The Australian National University.
- * All rights reserved.
+ * Copyright (c) 1994 Paul Mackerras. All rights reserved.
*
- * Permission to use, copy, modify, and distribute this software and its
- * documentation is hereby granted, provided that the above copyright
- * notice appears in all copies. This software is provided without any
- * warranty, express or implied. The Australian National University
- * makes no representations about the suitability of this software for
- * any purpose.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
*
- * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
- * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
- * THE AUSTRALIAN NATIONAL UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY
- * OF SUCH DAMAGE.
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
*
- * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
- * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
- * OR MODIFICATIONS.
+ * 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.
*
- * $Id: ppp_comp.c,v 1.9 1998/03/24 23:52:37 paulus Exp $
+ * 3. The name(s) of the authors of this software must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission.
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by Paul Mackerras
+ * <paulus@samba.org>".
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: ppp_comp.c,v 1.14 2002/12/06 09:49:15 paulus Exp $
*/
/*
cp = (comp_state_t *) ALLOC_SLEEP(sizeof(comp_state_t));
if (cp == NULL)
OPEN_ERROR(ENOSR);
- WR(q)->q_ptr = q->q_ptr = (caddr_t) cp;
bzero((caddr_t)cp, sizeof(comp_state_t));
+ WR(q)->q_ptr = q->q_ptr = (caddr_t) cp;
cp->mru = PPP_MRU;
cp->mtu = PPP_MTU;
cp->xstate = NULL;
cp->rstate = NULL;
vj_compress_init(&cp->vj_comp, -1);
- ++ppp_comp_count;
- qprocson(q);
#ifdef __osf__
if (!(thread = kernel_thread_w_arg(first_task, ppp_comp_alloc, (void *)cp)))
OPEN_ERROR(ENOSR);
cp->thread = thread;
#endif
+ ++ppp_comp_count;
+ qprocson(q);
}
return 0;
}
int nxslots, nrslots;
cp = (comp_state_t *) q->q_ptr;
+ if (cp == 0) {
+ DPRINT("cp == 0 in ppp_comp_wput\n");
+ freemsg(mp);
+ return 0;
+ }
+
switch (mp->b_datap->db_type) {
case M_DATA:
default:
putnext(q, mp);
}
+
+ return 0;
}
static int
ppp_comp_wsrv(q)
queue_t *q;
{
- mblk_t *mp, *cmp = NULL, *np;
+ mblk_t *mp, *cmp = NULL;
comp_state_t *cp;
int len, proto, type, hlen, code;
struct ip *ip;
unsigned char *vjhdr, *dp;
cp = (comp_state_t *) q->q_ptr;
+ if (cp == 0) {
+ DPRINT("cp == 0 in ppp_comp_wsrv\n");
+ return 0;
+ }
+
while ((mp = getq(q)) != 0) {
/* assert(mp->b_datap->db_type == M_DATA) */
#ifdef PRIOQ
- if (!bcanputnext(q,mp->b_band)) {
+ if (!bcanputnext(q,mp->b_band))
#else
- if (!canputnext(q)) {
-#endif PRIOQ
+ if (!canputnext(q))
+#endif /* PRIOQ */
+ {
putbq(q, mp);
- return;
+ break;
}
/*
if (cmp != NULL) {
#ifdef PRIOQ
cmp->b_band=mp->b_band;
-#endif PRIOQ
+#endif /* PRIOQ */
freemsg(mp);
mp = cmp;
}
cp->stats.ppp_obytes += msgdsize(mp);
putnext(q, mp);
}
+
+ return 0;
}
static int
struct ppp_stats *psp;
cp = (comp_state_t *) q->q_ptr;
+ if (cp == 0) {
+ DPRINT("cp == 0 in ppp_comp_rput\n");
+ freemsg(mp);
+ return 0;
+ }
+
switch (mp->b_datap->db_type) {
case M_DATA:
default:
putnext(q, mp);
}
+
+ return 0;
}
static int
u_int iphlen;
cp = (comp_state_t *) q->q_ptr;
+ if (cp == 0) {
+ DPRINT("cp == 0 in ppp_comp_rsrv\n");
+ return 0;
+ }
+
while ((mp = getq(q)) != 0) {
/* assert(mp->b_datap->db_type == M_DATA) */
if (!canputnext(q)) {
putbq(q, mp);
- return;
+ break;
}
len = msgdsize(mp);
cp->stats.ppp_ierrors++;
putctl1(q->q_next, M_CTL, PPPCTL_IERROR);
}
+
+ return 0;
}
/*
projects / ppp.git / blobdiff