Merge branch 'rp-pppoe-error' of https://github.com/snickl/lpppd

[ppp.git] / modules / ppp_ahdlc.c

diff --git a/modules/ppp_ahdlc.c b/modules/ppp_ahdlc.c
index a55b173ad4f67a58633d1b4b234d82944ed1d183..184b535657d199a605bde2c30bac3fe8692bd079 100644 (file)
--- a/modules/ppp_ahdlc.c
+++ b/modules/ppp_ahdlc.c
@@ -18,21 +18,36 @@
  * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
  * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES
  *
- * 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:
+ *
+ * 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.
+ *
+ * 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.
  *
- * 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.
+ * 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.
  *
  * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
@@ -41,7 +56,7 @@
  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
  * OR MODIFICATIONS.
  *
- * $Id: ppp_ahdlc.c,v 1.12 2000/01/21 01:04:56 masputra Exp $
+ * $Id: ppp_ahdlc.c,v 1.18 2002/12/06 09:49:15 paulus Exp $
  */
 
 /*
@@ -75,6 +90,21 @@
 #define USE_MUTEX
 #endif /* SOL2 */
 
+/*
+ * intpointer_t and uintpointer_t are signed and unsigned integer types 
+ * large enough to hold any data pointer; that is, data pointers can be 
+ * assigned into or from these integer types without losing precision.
+ * On recent Solaris releases, these types are defined in sys/int_types.h,
+ * but not on SunOS 4.x or the earlier Solaris versions.
+ */
+#if defined(_LP64) || defined(_I32LPx)
+typedef long                    intpointer_t;
+typedef unsigned long           uintpointer_t;
+#else
+typedef int                     intpointer_t;
+typedef unsigned int            uintpointer_t;
+#endif
+
 MOD_OPEN_DECL(ahdlc_open);
 MOD_CLOSE_DECL(ahdlc_close);
 static int ahdlc_wput __P((queue_t *, mblk_t *));
@@ -128,11 +158,15 @@ struct streamtab ppp_ahdlcinfo = {
     &winit,                        /* ptr to st_wrinit */
     NULL,                          /* ptr to st_muxrinit */
     NULL,                          /* ptr to st_muxwinit */
-#ifdef _SunOS4
+#if defined(SUNOS4)
     NULL                           /* ptr to ptr to st_modlist */
-#endif /* _SunOS4 */
+#endif /* SUNOS4 */
 };
 
+#if defined(SUNOS4)
+int ppp_ahdlc_count = 0;           /* open counter */
+#endif /* SUNOS4 */
+
 /*
  * Per-stream state structure
  */
@@ -256,6 +290,10 @@ MOD_OPEN(ahdlc_open)
     mutex_exit(&state->lock);
 #endif /* USE_MUTEX */ 
 
+#if defined(SUNOS4)
+    ppp_ahdlc_count++;
+#endif /* SUNOS4 */
+
     qprocson(q);
     
     return 0;
@@ -294,6 +332,11 @@ MOD_CLOSE(ahdlc_close)
     FREE(q->q_ptr, sizeof(ahdlc_state_t));
     q->q_ptr        = NULL;
     OTHERQ(q)->q_ptr = NULL;
+
+#if defined(SUNOS4)
+    if (ppp_ahdlc_count)
+       ppp_ahdlc_count--;
+#endif /* SUNOS4 */
     
     return 0;
 }
@@ -499,7 +542,6 @@ ahdlc_rput(q, mp)
     switch (mp->b_datap->db_type) {
     case M_DATA:
        ahdlc_decode(q, mp);
-       freemsg(mp);
        break;
 
     case M_HANGUP:
@@ -578,7 +620,7 @@ ahdlc_encode(q, mp)
      * the system's LBOLT value in clock ticks
      */
     if (drv_getparm(LBOLT, &lbolt) != -1) {
-       if (ABS((clock32_t)lbolt - state->lbolt) > state->flag_time) {
+       if (ABS((clock_t)lbolt - state->lbolt) > state->flag_time) {
            *outmp->b_wptr++ = PPP_FLAG;
        } 
        state->lbolt = lbolt;
@@ -675,6 +717,7 @@ ahdlc_encode(q, mp)
 #define IN_RX_MAP(c, m)        ((((unsigned int) (uchar_t) (c)) < 0x20) && \
                        (m) & (1 << (c)))
 
+
 /*
  * Process received characters.
  */
@@ -684,23 +727,8 @@ ahdlc_decode(q, mp)
     mblk_t  *mp;
 {
     ahdlc_state_t   *state;
-    mblk_t         *om, *zmp;
+    mblk_t         *om;
     uchar_t        *dp;
-    ushort_t       fcs;
-
-    /*
-     * In case the driver (or something below) doesn't send
-     * data upstream in one message block, concatenate everything
-     */
-    if (!((mp->b_wptr - mp->b_rptr == msgdsize(mp)) && 
-         ((intptr_t)mp->b_rptr % sizeof(intptr_t) == 0))) {
-
-       zmp = msgpullup(mp, -1);
-       freemsg(mp);
-       mp = zmp;
-       if (mp == 0)
-           return; 
-    }
 
     state = (ahdlc_state_t *) q->q_ptr;
 
@@ -710,6 +738,7 @@ ahdlc_decode(q, mp)
 
     state->stats.ppp_ibytes += msgdsize(mp);
 
+    for (; mp != 0; om = mp->b_cont, freeb(mp), mp = om)
     for (dp = mp->b_rptr; dp < mp->b_wptr; dp++) {
 
        /*