added GetMask

[ppp.git] / modules / bsd-comp.c

diff --git a/modules/bsd-comp.c b/modules/bsd-comp.c
index dfa73aaa538346266f9f2a5d689200fbcab2a551..d30e0d25f69da08dc4781cdfc6e1b58e85f0e9c0 100644 (file)
--- a/modules/bsd-comp.c
+++ b/modules/bsd-comp.c
@@ -38,20 +38,40 @@
  */
 
 /*
- * This version is for use with STREAMS under SunOS 4.x.
+ * This version is for use with STREAMS under SunOS 4.x,
+ * DEC Alpha OSF/1, and AIX 4.x.
  *
- * $Id: bsd-comp.c,v 1.6 1994/10/24 04:28:14 paulus Exp $
+ * $Id: bsd-comp.c,v 1.8 1994/12/08 00:35:33 paulus Exp $
  */
 
+#ifdef __aix4__
+#include <net/net_globals.h>
+#endif
 #include <sys/param.h>
 #include <sys/types.h>
 #include <sys/stream.h>
-#include <sys/kmem_alloc.h>
 #include <sys/socket.h>
 #include <net/if.h>
 #include <net/ppp_defs.h>
 #include <net/ppp_str.h>
 
+#ifdef sun
+#include <sys/kmem_alloc.h>
+#define ALLOCATE(n)    kmem_alloc((n), KMEM_NOSLEEP)
+#define FREE(p, n)     kmem_free((p), (n))
+#endif
+
+#ifdef __osf__
+#include <kern/kalloc.h>
+#define ALLOCATE(n)    kalloc((n))
+#define FREE(p, n)     kfree((p), (n))
+#endif
+
+#ifdef __aix4__
+#define ALLOCATE(n)    xmalloc((n), 0, pinned_heap)
+#define FREE(p, n)     xmfree((p), pinned_heap)
+#endif
+
 #define PACKETPTR      mblk_t *
 #include <net/ppp-comp.h>
 
@@ -98,6 +118,7 @@ struct bsd_db {
     u_char  debug;
     u_char  unit;
     u_short seqno;                     /* sequence number of next packet */
+    u_int   hdrlen;                    /* header length to preallocate */
     u_int   mru;
     u_int   maxmaxcode;                        /* largest valid code */
     u_int   max_ent;                   /* largest code in use */
@@ -144,7 +165,7 @@ static void bsd_free __P((void *state));
 static int     bsd_comp_init __P((void *state, u_char *options, int opt_len,
                                   int unit, int debug));
 static int     bsd_decomp_init __P((void *state, u_char *options, int opt_len,
-                                    int unit, int mru, int debug));
+                                    int unit, int hdrlen, int mru, int debug));
 static int     bsd_compress __P((void *state, mblk_t **mret,
                                  mblk_t *mp, int slen, int maxolen));
 static void    bsd_incomp __P((void *state, mblk_t *dmsg));
@@ -351,7 +372,7 @@ bsd_alloc(options, opt_len, decomp)
 
     maxmaxcode = MAXCODE(bits);
     newlen = sizeof(*db) + (hsize-1) * (sizeof(db->dict[0]));
-    db = (struct bsd_db *) kmem_alloc(newlen, KMEM_NOSLEEP);
+    db = (struct bsd_db *) ALLOCATE(newlen);
     if (!db)
        return NULL;
     bzero(db, sizeof(*db) - sizeof(db->dict));
@@ -359,10 +380,9 @@ bsd_alloc(options, opt_len, decomp)
     if (!decomp) {
        db->lens = NULL;
     } else {
-       db->lens = (u_short *) kmem_alloc((maxmaxcode+1) * sizeof(db->lens[0]),
-                                         KMEM_NOSLEEP);
+       db->lens = (u_short *) ALLOCATE((maxmaxcode+1) * sizeof(db->lens[0]));
        if (!db->lens) {
-           kmem_free(db, newlen);
+           FREE(db, newlen);
            return NULL;
        }
     }
@@ -383,8 +403,8 @@ bsd_free(state)
     struct bsd_db *db = (struct bsd_db *) state;
 
     if (db->lens)
-       kmem_free(db->lens, (db->maxmaxcode+1) * sizeof(db->lens[0]));
-    kmem_free(db, db->totlen);
+       FREE(db->lens, (db->maxmaxcode+1) * sizeof(db->lens[0]));
+    FREE(db, db->totlen);
 }
 
 static void *
@@ -407,10 +427,10 @@ bsd_decomp_alloc(options, opt_len)
  * Initialize the database.
  */
 static int
-bsd_init(db, options, opt_len, unit, mru, debug, decomp)
+bsd_init(db, options, opt_len, unit, hdrlen, mru, debug, decomp)
     struct bsd_db *db;
     u_char *options;
-    int opt_len, unit, mru, debug, decomp;
+    int opt_len, unit, hdrlen, mru, debug, decomp;
 {
     int i;
 
@@ -432,6 +452,7 @@ bsd_init(db, options, opt_len, unit, mru, debug, decomp)
     }
 
     db->unit = unit;
+    db->hdrlen = hdrlen;
     db->mru = mru;
     if (debug)
        db->debug = 1;
@@ -448,17 +469,17 @@ bsd_comp_init(state, options, opt_len, unit, debug)
     int opt_len, unit, debug;
 {
     return bsd_init((struct bsd_db *) state, options, opt_len,
-                   unit, 0, debug, 0);
+                   unit, 0, 0, debug, 0);
 }
 
 static int
-bsd_decomp_init(state, options, opt_len, unit, mru, debug)
+bsd_decomp_init(state, options, opt_len, unit, hdrlen, mru, debug)
     void *state;
     u_char *options;
-    int opt_len, unit, mru, debug;
+    int opt_len, unit, hdrlen, mru, debug;
 {
     return bsd_init((struct bsd_db *) state, options, opt_len,
-                   unit, mru, debug, 1);
+                   unit, hdrlen, mru, debug, 1);
 }
 
 
@@ -881,9 +902,10 @@ bsd_decompress(state, cmsg, dmpp)
     /*
      * Allocate one message block to start with.
      */
-    if ((dmsg = allocb(DECOMP_CHUNK, BPRI_MED)) == NULL)
+    if ((dmsg = allocb(DECOMP_CHUNK + db->hdrlen, BPRI_MED)) == NULL)
        return DECOMP_ERROR;
     mret = dmsg;
+    dmsg->b_wptr += db->hdrlen;
     dmsg->b_rptr = wptr = dmsg->b_wptr;
 
     /* Fill in the ppp header, but not the last byte of the protocol