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BSD 4_3_Reno release
[unix-history] / usr / src / sys / nfs / nfs_subs.c
diff --git a/usr/src/sys/nfs/nfs_subs.c b/usr/src/sys/nfs/nfs_subs.c
index 8fde260..b2344f4 100644 (file)
--- a/usr/src/sys/nfs/nfs_subs.c
+++ b/usr/src/sys/nfs/nfs_subs.c
@@ -5,9 +5,22 @@
  * This code is derived from software contributed to Berkeley by
  * Rick Macklem at The University of Guelph.
  *
  * This code is derived from software contributed to Berkeley by
  * Rick Macklem at The University of Guelph.
  *
- * %sccs.include.redist.c%
+ * Redistribution is only permitted until one year after the first shipment
+ * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
+ * binary forms are permitted provided that: (1) source distributions retain
+ * this entire copyright notice and comment, and (2) distributions including
+ * binaries display the following acknowledgement:  This product includes
+ * software developed by the University of California, Berkeley and its
+ * contributors'' in the documentation or other materials provided with the
+ * distribution and in all advertising materials mentioning features or use
+ * of this software.  Neither the name of the University nor the names of
+ * its contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
  *
- *     @(#)nfs_subs.c  7.31 (Berkeley) %G%
+ *     @(#)nfs_subs.c  7.29 (Berkeley) 7/26/90
  */
 
 /*
  */
 
 /*
@@ -33,7 +46,6 @@
 #include "nfsiom.h"
 #include "xdr_subs.h"
 #include "nfsm_subs.h"
 #include "nfsiom.h"
 #include "xdr_subs.h"
 #include "nfsm_subs.h"
-#include "nfscompress.h"
 
 #define TRUE   1
 #define        FALSE   0
 
 #define TRUE   1
 #define        FALSE   0
@@ -879,203 +891,3 @@ nfsrv_fhtovp(fhp, lockflag, vpp, cred)
                VOP_UNLOCK(*vpp);
        return (0);
 }
                VOP_UNLOCK(*vpp);
        return (0);
 }
-
-/*
- * These two functions implement nfs rpc compression.
- * The algorithm is a trivial run length encoding of '\0' bytes. The high
- * order nibble of hex "e" is or'd with the number of zeroes - 2 in four
- * bits. (2 - 17 zeros) Any data byte with a high order nibble of hex "e"
- * is byte stuffed.
- * The compressed data is padded with 0x0 bytes to an even multiple of
- * 4 bytes in length to avoid any weird long pointer alignments.
- * If compression/uncompression is unsuccessful, the original mbuf list
- * is returned.
- * The first four bytes (the XID) are left uncompressed and the fifth
- * byte is set to 0x1 for request and 0x2 for reply.
- * An uncompressed RPC will always have the fifth byte == 0x0.
- */
-struct mbuf *
-nfs_compress(m0)
-       struct mbuf *m0;
-{
-       register u_char ch, nextch;
-       register int i, rlelast;
-       register u_char *ip, *op;
-       register int ileft, oleft, noteof;
-       register struct mbuf *m, *om;
-       struct mbuf **mp, *retm;
-       int olen, clget;
-
-       i = rlelast = 0;
-       noteof = 1;
-       m = m0;
-       if (m->m_len < 12)
-               return (m0);
-       if (m->m_pkthdr.len >= MINCLSIZE)
-               clget = 1;
-       else
-               clget = 0;
-       ileft = m->m_len - 9;
-       ip = mtod(m, u_char *);
-       MGETHDR(om, M_WAIT, MT_DATA);
-       if (clget)
-               MCLGET(om, M_WAIT);
-       retm = om;
-       mp = &om->m_next;
-       olen = om->m_len = 5;
-       oleft = M_TRAILINGSPACE(om);
-       op = mtod(om, u_char *);
-       bcopy(ip, op, sizeof(u_long));
-       ip += 7;
-       op += 4;
-       *op++ = *ip++ + 1;
-       nextch = *ip++;
-       while (noteof) {
-               ch = nextch;
-               if (ileft == 0) {
-                       do {
-                               m = m->m_next;
-                       } while (m && m->m_len == 0);
-                       if (m) {
-                               ileft = m->m_len;
-                               ip = mtod(m, u_char *);
-                       } else {
-                               noteof = 0;
-                               nextch = 0x1;
-                               goto doit;
-                       }
-               }
-               nextch = *ip++;
-               ileft--;
-doit:
-               if (ch == '\0') {
-                       if (++i == NFSC_MAX || nextch != '\0') {
-                               if (i < 2) {
-                                       nfscput('\0');
-                               } else {
-                                       if (rlelast == i) {
-                                               nfscput('\0');
-                                               i--;
-                                       }
-                                       if (NFSCRLE(i) == (nextch & 0xff)) {
-                                               i--;
-                                               if (i < 2) {
-                                                       nfscput('\0');
-                                               } else {
-                                                       nfscput(NFSCRLE(i));
-                                               }
-                                               nfscput('\0');
-                                               rlelast = 0;
-                                       } else {
-                                               nfscput(NFSCRLE(i));
-                                               rlelast = i;
-                                       }
-                               }
-                               i = 0;
-                       }
-               } else {
-                       if ((ch & NFSCRL) == NFSCRL) {
-                               nfscput(ch);
-                       }
-                       nfscput(ch);
-                       i = rlelast = 0;
-               }
-       }
-       if (olen < m0->m_pkthdr.len) {
-               m_freem(m0);
-               if (i = (olen & 0x3)) {
-                       i = 4 - i;
-                       while (i-- > 0)
-                               nfscput('\0');
-               }
-               retm->m_pkthdr.len = olen;
-               return (retm);
-       } else {
-               m_freem(retm);
-               return (m0);
-       }
-}
-
-struct mbuf *
-nfs_uncompress(m0)
-       struct mbuf *m0;
-{
-       register u_char cp, nextcp, *ip, *op;
-       register struct mbuf *m, *om;
-       struct mbuf *retm, **mp;
-       int i, j, noteof, clget, ileft, oleft, olen;
-
-       m = m0;
-       if (m->m_pkthdr.len < 6)
-               return (m0);
-       if (m->m_pkthdr.len >= MINCLSIZE)
-               clget = 1;
-       else
-               clget = 0;
-       MGETHDR(om, M_WAIT, MT_DATA);
-       if (clget)
-               MCLGET(om, M_WAIT);
-       olen = om->m_len = 8;
-       oleft = M_TRAILINGSPACE(om);
-       op = mtod(om, u_char *);
-       retm = om;
-       mp = &om->m_next;
-       if (m->m_len >= 6) {
-               ileft = m->m_len - 6;
-               ip = mtod(m, u_char *);
-               *((u_long *)op) = *((u_long *)ip);
-               bzero(op + 4, 3);
-               ip += 4;
-               op += 7;
-               if (*ip == '\0') {
-                       m_freem(om);
-                       return (m0);
-               }
-               *op++ = *ip++ - 1;
-               cp = *ip++;
-       } else {
-               ileft = m->m_len;
-               ip = mtod(m, u_char *);
-               nfscget(*op++);
-               nfscget(*op++);
-               nfscget(*op++);
-               nfscget(*op++);
-               bzero(op, 3);
-               op += 3;
-               nfscget(*op);
-               if (*op == '\0') {
-                       m_freem(om);
-                       return (m0);
-               }
-               (*op)--;
-               op++;
-               nfscget(cp);
-       }
-       noteof = 1;
-       while (noteof) {
-               if ((cp & NFSCRL) == NFSCRL) {
-                       nfscget(nextcp);
-                       if (cp == nextcp) {
-                               nfscput(cp);
-                               goto readit;
-                       } else {
-                               i = (cp & 0xf) + 2;
-                               for (j = 0; j < i; j++) {
-                                       nfscput('\0');
-                               }
-                               cp = nextcp;
-                       }
-               } else {
-                       nfscput(cp);
-readit:
-                       nfscget(cp);
-               }
-       }
-       m_freem(m0);
-       if (i = (olen & 0x3)) {
-               olen -= i;
-               om->m_len -= i;
-       }
-       retm->m_pkthdr.len = olen;
-       return (retm);
-}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.