support old draft rfc deflate number

[ppp.git] / ultrix / ppp-deflate.c

diff --git a/ultrix/ppp-deflate.c b/ultrix/ppp-deflate.c
index c6e62990b3d370d00bcf483be347c0dd6a6a57fa..45f8dbef995a953a1b54866ca0da0a572c5830bc 100644 (file)
--- a/ultrix/ppp-deflate.c
+++ b/ultrix/ppp-deflate.c
@@ -1,4 +1,4 @@
-/*     $Id: ppp-deflate.c,v 1.1 1996/07/01 01:24:27 paulus Exp $       */
+/*     $Id: ppp-deflate.c,v 1.5 1998/03/25 03:11:37 paulus Exp $       */
 
 /*
  * ppp_deflate.c - interface the zlib procedures for Deflate compression
@@ -59,7 +59,7 @@ struct deflate_state {
 #define DEFLATE_OVHD   2               /* Deflate overhead/packet */
 
 static void    *zalloc __P((void *, u_int items, u_int size));
-static void    zfree __P((void *, void *ptr, u_int nb));
+static void    zfree __P((void *, void *ptr));
 static void    *z_comp_alloc __P((u_char *options, int opt_len));
 static void    *z_decomp_alloc __P((u_char *options, int opt_len));
 static void    z_comp_free __P((void *state));
@@ -97,6 +97,32 @@ struct compressor ppp_deflate = {
     z_comp_stats,              /* decomp_stat */
 };
 
+struct compressor ppp_deflate_draft = {
+    CI_DEFLATE_DRAFT,          /* compress_proto */
+    z_comp_alloc,              /* comp_alloc */
+    z_comp_free,               /* comp_free */
+    z_comp_init,               /* comp_init */
+    z_comp_reset,              /* comp_reset */
+    z_compress,                        /* compress */
+    z_comp_stats,              /* comp_stat */
+    z_decomp_alloc,            /* decomp_alloc */
+    z_decomp_free,             /* decomp_free */
+    z_decomp_init,             /* decomp_init */
+    z_decomp_reset,            /* decomp_reset */
+    z_decompress,              /* decompress */
+    z_incomp,                  /* incomp */
+    z_comp_stats,              /* decomp_stat */
+};
+
+/*
+ * Some useful mbuf macros not in mbuf.h.
+ */
+#define M_IS_CLUSTER(m) ((m)->m_off > MMAXOFF)
+
+#define M_TRAILINGSPACE(m) \
+       ((M_IS_CLUSTER(m) ? (u_int)(m)->m_clptr + M_CLUSTERSZ : MSIZE) \
+        - ((m)->m_off + (m)->m_len))
+
 /*
  * Space allocation and freeing routines for use by zlib routines.
  */
@@ -112,10 +138,9 @@ zalloc(notused, items, size)
 }
 
 void
-zfree(notused, ptr, nbytes)
+zfree(notused, ptr)
     void *notused;
     void *ptr;
-    u_int nbytes;
 {
     KM_FREE(ptr, KM_DEVBUF);
 }
@@ -131,7 +156,8 @@ z_comp_alloc(options, opt_len)
     struct deflate_state *state;
     int w_size;
 
-    if (opt_len != CILEN_DEFLATE || options[0] != CI_DEFLATE
+    if (opt_len != CILEN_DEFLATE
+       || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT)
        || options[1] != CILEN_DEFLATE
        || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL
        || options[3] != DEFLATE_CHK_SEQUENCE)
@@ -140,17 +166,18 @@ z_comp_alloc(options, opt_len)
     if (w_size < DEFLATE_MIN_SIZE || w_size > DEFLATE_MAX_SIZE)
        return NULL;
 
-    MALLOC(state, struct deflate_state *, sizeof(struct deflate_state),
-          M_DEVBUF, M_NOWAIT);
+    KM_ALLOC(state, struct deflate_state *, sizeof(struct deflate_state),
+            KM_DEVBUF, KM_NOARG);
     if (state == NULL)
        return NULL;
+    bzero(state, sizeof(struct deflate_state));
 
     state->strm.next_in = NULL;
-    state->strm.zalloc = zalloc;
-    state->strm.zfree = zfree;
+    state->strm.zalloc = (alloc_func) zalloc;
+    state->strm.zfree = (free_func) zfree;
     if (deflateInit2(&state->strm, Z_DEFAULT_COMPRESSION, DEFLATE_METHOD_VAL,
-                    -w_size, 8, Z_DEFAULT_STRATEGY, DEFLATE_OVHD+2) != Z_OK) {
-       FREE(state, M_DEVBUF);
+                    -w_size, 8, Z_DEFAULT_STRATEGY) != Z_OK) {
+       KM_FREE(state, KM_DEVBUF);
        return NULL;
     }
 
@@ -166,7 +193,7 @@ z_comp_free(arg)
     struct deflate_state *state = (struct deflate_state *) arg;
 
     deflateEnd(&state->strm);
-    FREE(state, M_DEVBUF);
+    KM_FREE(state, KM_DEVBUF);
 }
 
 static int
@@ -177,7 +204,8 @@ z_comp_init(arg, options, opt_len, unit, hdrlen, debug)
 {
     struct deflate_state *state = (struct deflate_state *) arg;
 
-    if (opt_len < CILEN_DEFLATE || options[0] != CI_DEFLATE
+    if (opt_len < CILEN_DEFLATE
+       || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT)
        || options[1] != CILEN_DEFLATE
        || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL
        || DEFLATE_SIZE(options[2]) != state->w_size
@@ -214,7 +242,7 @@ z_compress(arg, mret, mp, orig_len, maxolen)
     struct deflate_state *state = (struct deflate_state *) arg;
     u_char *rptr, *wptr;
     int proto, olen, wspace, r, flush;
-    struct mbuf *m;
+    struct mbuf *m, *clp;
 
     /*
      * Check that the protocol is in the range we handle.
@@ -232,12 +260,14 @@ z_compress(arg, mret, mp, orig_len, maxolen)
     MGET(m, M_DONTWAIT, MT_DATA);
     *mret = m;
     if (m != NULL) {
+       if (maxolen + state->hdrlen > MLEN) {
+           /* MCLGET is not a single statement!!! */
+           MCLGET(m, clp)
+       }
        m->m_len = 0;
-       if (maxolen + state->hdrlen > MLEN)
-           MCLGET(m, M_DONTWAIT);
        wspace = M_TRAILINGSPACE(m);
-       if (state->hdrlen + PPP_HDRLEN + 2 < wspace) {
-           m->m_data += state->hdrlen;
+       if (state->hdrlen > 0 && state->hdrlen + PPP_HDRLEN + 2 < wspace) {
+           m->m_off += state->hdrlen;
            wspace -= state->hdrlen;
        }
        wptr = mtod(m, u_char *);
@@ -292,9 +322,10 @@ z_compress(arg, mret, mp, orig_len, maxolen)
                MGET(m->m_next, M_DONTWAIT, MT_DATA);
                m = m->m_next;
                if (m != NULL) {
+                   if (maxolen - olen > MLEN) {
+                       MCLGET(m, clp)
+                   }
                    m->m_len = 0;
-                   if (maxolen - olen > MLEN)
-                       MCLGET(m, M_DONTWAIT);
                    state->strm.next_out = mtod(m, u_char *);
                    state->strm.avail_out = wspace = M_TRAILINGSPACE(m);
                }
@@ -362,7 +393,8 @@ z_decomp_alloc(options, opt_len)
     struct deflate_state *state;
     int w_size;
 
-    if (opt_len != CILEN_DEFLATE || options[0] != CI_DEFLATE
+    if (opt_len != CILEN_DEFLATE
+       || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT)
        || options[1] != CILEN_DEFLATE
        || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL
        || options[3] != DEFLATE_CHK_SEQUENCE)
@@ -371,16 +403,17 @@ z_decomp_alloc(options, opt_len)
     if (w_size < DEFLATE_MIN_SIZE || w_size > DEFLATE_MAX_SIZE)
        return NULL;
 
-    MALLOC(state, struct deflate_state *, sizeof(struct deflate_state),
-          M_DEVBUF, M_NOWAIT);
+    KM_ALLOC(state, struct deflate_state *, sizeof(struct deflate_state),
+            KM_DEVBUF, KM_NOARG);
     if (state == NULL)
        return NULL;
+    bzero(state, sizeof(struct deflate_state));
 
     state->strm.next_out = NULL;
-    state->strm.zalloc = zalloc;
-    state->strm.zfree = zfree;
+    state->strm.zalloc = (alloc_func) zalloc;
+    state->strm.zfree = (free_func) zfree;
     if (inflateInit2(&state->strm, -w_size) != Z_OK) {
-       FREE(state, M_DEVBUF);
+       KM_FREE(state, KM_DEVBUF);
        return NULL;
     }
 
@@ -396,7 +429,7 @@ z_decomp_free(arg)
     struct deflate_state *state = (struct deflate_state *) arg;
 
     inflateEnd(&state->strm);
-    FREE(state, M_DEVBUF);
+    KM_FREE(state, KM_DEVBUF);
 }
 
 static int
@@ -407,7 +440,8 @@ z_decomp_init(arg, options, opt_len, unit, hdrlen, mru, debug)
 {
     struct deflate_state *state = (struct deflate_state *) arg;
 
-    if (opt_len < CILEN_DEFLATE || options[0] != CI_DEFLATE
+    if (opt_len < CILEN_DEFLATE
+       || (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT)
        || options[1] != CILEN_DEFLATE
        || DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL
        || DEFLATE_SIZE(options[2]) != state->w_size
@@ -457,7 +491,7 @@ z_decompress(arg, mi, mop)
     struct mbuf *mi, **mop;
 {
     struct deflate_state *state = (struct deflate_state *) arg;
-    struct mbuf *mo, *mo_head;
+    struct mbuf *mo, *mo_head, *clp;
     u_char *rptr, *wptr;
     int rlen, olen, ospace;
     int seq, i, flush, r, decode_proto;
@@ -489,16 +523,16 @@ z_decompress(arg, mi, mop)
     ++state->seqno;
 
     /* Allocate an output mbuf. */
-    MGETHDR(mo, M_DONTWAIT, MT_DATA);
+    MGET(mo, M_DONTWAIT, MT_DATA);
     if (mo == NULL)
        return DECOMP_ERROR;
     mo_head = mo;
-    mo->m_len = 0;
     mo->m_next = NULL;
-    MCLGET(mo, M_DONTWAIT);
+    MCLGET(mo, clp)
+    mo->m_len = 0;
     ospace = M_TRAILINGSPACE(mo);
-    if (state->hdrlen + PPP_HDRLEN < ospace) {
-       mo->m_data += state->hdrlen;
+    if (state->hdrlen > 0 && state->hdrlen + PPP_HDRLEN < ospace) {
+       mo->m_off += state->hdrlen;
        ospace -= state->hdrlen;
     }
 
@@ -568,7 +602,8 @@ z_decompress(arg, mi, mop)
                    m_freem(mo_head);
                    return DECOMP_ERROR;
                }
-               MCLGET(mo, M_DONTWAIT);
+               MCLGET(mo, clp)
+               mo->m_len = 0;
                state->strm.next_out = mtod(mo, u_char *);
                state->strm.avail_out = ospace = M_TRAILINGSPACE(mo);
            }