/*
* This version is for use with STREAMS under SunOS 4.x.
*
- * $Id: bsd-comp.c,v 1.6 1994/10/24 04:28:14 paulus Exp $
+ * $Id: bsd-comp.c,v 1.7 1994/11/30 05:29:36 paulus Exp $
*/
#include <sys/param.h>
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 */
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));
* 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;
}
db->unit = unit;
+ db->hdrlen = hdrlen;
db->mru = mru;
if (debug)
db->debug = 1;
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);
}
/*
* 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