diff options
Diffstat (limited to 'freebsd/sys/xdr/xdr_mem.c')
| -rw-r--r-- | freebsd/sys/xdr/xdr_mem.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/freebsd/sys/xdr/xdr_mem.c b/freebsd/sys/xdr/xdr_mem.c new file mode 100644 index 00000000..8a14f17e --- /dev/null +++ b/freebsd/sys/xdr/xdr_mem.c @@ -0,0 +1,275 @@ +/* $NetBSD: xdr_mem.c,v 1.15 2000/01/22 22:19:18 mycroft Exp $ */ + +/* + * Sun RPC is a product of Sun Microsystems, Inc. and is provided for + * unrestricted use provided that this legend is included on all tape + * media and as a part of the software program in whole or part. Users + * may copy or modify Sun RPC without charge, but are not authorized + * to license or distribute it to anyone else except as part of a product or + * program developed by the user. + * + * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE + * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR + * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. + * + * Sun RPC is provided with no support and without any obligation on the + * part of Sun Microsystems, Inc. to assist in its use, correction, + * modification or enhancement. + * + * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE + * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC + * OR ANY PART THEREOF. + * + * In no event will Sun Microsystems, Inc. be liable for any lost revenue + * or profits or other special, indirect and consequential damages, even if + * Sun has been advised of the possibility of such damages. + * + * Sun Microsystems, Inc. + * 2550 Garcia Avenue + * Mountain View, California 94043 + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char *sccsid2 = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro"; +static char *sccsid = "@(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC"; +#endif +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * xdr_mem.h, XDR implementation using memory buffers. + * + * Copyright (C) 1984, Sun Microsystems, Inc. + * + * If you have some data to be interpreted as external data representation + * or to be converted to external data representation in a memory buffer, + * then this is the package for you. + * + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/malloc.h> + +#include <rpc/types.h> +#include <rpc/xdr.h> + +static void xdrmem_destroy(XDR *); +static bool_t xdrmem_getlong_aligned(XDR *, long *); +static bool_t xdrmem_putlong_aligned(XDR *, const long *); +static bool_t xdrmem_getlong_unaligned(XDR *, long *); +static bool_t xdrmem_putlong_unaligned(XDR *, const long *); +static bool_t xdrmem_getbytes(XDR *, char *, u_int); +static bool_t xdrmem_putbytes(XDR *, const char *, u_int); +/* XXX: w/64-bit pointers, u_int not enough! */ +static u_int xdrmem_getpos(XDR *); +static bool_t xdrmem_setpos(XDR *, u_int); +static int32_t *xdrmem_inline_aligned(XDR *, u_int); +static int32_t *xdrmem_inline_unaligned(XDR *, u_int); +static bool_t xdrmem_control(XDR *xdrs, int request, void *info); + +static const struct xdr_ops xdrmem_ops_aligned = { + xdrmem_getlong_aligned, + xdrmem_putlong_aligned, + xdrmem_getbytes, + xdrmem_putbytes, + xdrmem_getpos, + xdrmem_setpos, + xdrmem_inline_aligned, + xdrmem_destroy, + xdrmem_control +}; + +static const struct xdr_ops xdrmem_ops_unaligned = { + xdrmem_getlong_unaligned, + xdrmem_putlong_unaligned, + xdrmem_getbytes, + xdrmem_putbytes, + xdrmem_getpos, + xdrmem_setpos, + xdrmem_inline_unaligned, + xdrmem_destroy, + xdrmem_control +}; + +/* + * The procedure xdrmem_create initializes a stream descriptor for a + * memory buffer. + */ +void +xdrmem_create(XDR *xdrs, char *addr, u_int size, enum xdr_op op) +{ + + xdrs->x_op = op; + xdrs->x_ops = ((unsigned long)addr & (sizeof(int32_t) - 1)) + ? &xdrmem_ops_unaligned : &xdrmem_ops_aligned; + xdrs->x_private = xdrs->x_base = addr; + xdrs->x_handy = size; +} + +/*ARGSUSED*/ +static void +xdrmem_destroy(XDR *xdrs) +{ + +} + +static bool_t +xdrmem_getlong_aligned(XDR *xdrs, long *lp) +{ + + if (xdrs->x_handy < sizeof(int32_t)) + return (FALSE); + xdrs->x_handy -= sizeof(int32_t); + *lp = ntohl(*(u_int32_t *)xdrs->x_private); + xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); + return (TRUE); +} + +static bool_t +xdrmem_putlong_aligned(XDR *xdrs, const long *lp) +{ + + if (xdrs->x_handy < sizeof(int32_t)) + return (FALSE); + xdrs->x_handy -= sizeof(int32_t); + *(u_int32_t *)xdrs->x_private = htonl((u_int32_t)*lp); + xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); + return (TRUE); +} + +static bool_t +xdrmem_getlong_unaligned(XDR *xdrs, long *lp) +{ + u_int32_t l; + + if (xdrs->x_handy < sizeof(int32_t)) + return (FALSE); + xdrs->x_handy -= sizeof(int32_t); + memmove(&l, xdrs->x_private, sizeof(int32_t)); + *lp = ntohl(l); + xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); + return (TRUE); +} + +static bool_t +xdrmem_putlong_unaligned(XDR *xdrs, const long *lp) +{ + u_int32_t l; + + if (xdrs->x_handy < sizeof(int32_t)) + return (FALSE); + xdrs->x_handy -= sizeof(int32_t); + l = htonl((u_int32_t)*lp); + memmove(xdrs->x_private, &l, sizeof(int32_t)); + xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t); + return (TRUE); +} + +static bool_t +xdrmem_getbytes(XDR *xdrs, char *addr, u_int len) +{ + + if (xdrs->x_handy < len) + return (FALSE); + xdrs->x_handy -= len; + memmove(addr, xdrs->x_private, len); + xdrs->x_private = (char *)xdrs->x_private + len; + return (TRUE); +} + +static bool_t +xdrmem_putbytes(XDR *xdrs, const char *addr, u_int len) +{ + + if (xdrs->x_handy < len) + return (FALSE); + xdrs->x_handy -= len; + memmove(xdrs->x_private, addr, len); + xdrs->x_private = (char *)xdrs->x_private + len; + return (TRUE); +} + +static u_int +xdrmem_getpos(XDR *xdrs) +{ + + /* XXX w/64-bit pointers, u_int not enough! */ + return (u_int)((u_long)xdrs->x_private - (u_long)xdrs->x_base); +} + +static bool_t +xdrmem_setpos(XDR *xdrs, u_int pos) +{ + char *newaddr = xdrs->x_base + pos; + char *lastaddr = (char *)xdrs->x_private + xdrs->x_handy; + + if (newaddr > lastaddr) + return (FALSE); + xdrs->x_private = newaddr; + xdrs->x_handy = (u_int)(lastaddr - newaddr); /* XXX sizeof(u_int) <? sizeof(ptrdiff_t) */ + return (TRUE); +} + +static int32_t * +xdrmem_inline_aligned(XDR *xdrs, u_int len) +{ + int32_t *buf = NULL; + + if (xdrs->x_handy >= len) { + xdrs->x_handy -= len; + buf = (int32_t *)xdrs->x_private; + xdrs->x_private = (char *)xdrs->x_private + len; + } + return (buf); +} + +/* ARGSUSED */ +static int32_t * +xdrmem_inline_unaligned(XDR *xdrs, u_int len) +{ + + return (0); +} + +static bool_t +xdrmem_control(XDR *xdrs, int request, void *info) +{ + xdr_bytesrec *xptr; + int32_t *l; + int len; + + switch (request) { + + case XDR_GET_BYTES_AVAIL: + xptr = (xdr_bytesrec *)info; + xptr->xc_is_last_record = TRUE; + xptr->xc_num_avail = xdrs->x_handy; + return (TRUE); + + case XDR_PEEK: + /* + * Return the next 4 byte unit in the XDR stream. + */ + if (xdrs->x_handy < sizeof (int32_t)) + return (FALSE); + l = (int32_t *)info; + *l = (int32_t)ntohl((uint32_t) + (*((int32_t *)(xdrs->x_private)))); + return (TRUE); + + case XDR_SKIPBYTES: + /* + * Skip the next N bytes in the XDR stream. + */ + l = (int32_t *)info; + len = RNDUP((int)(*l)); + if (xdrs->x_handy < len) + return (FALSE); + xdrs->x_handy -= len; + xdrs->x_private = (char *)xdrs->x_private + len; + return (TRUE); + + } + return (FALSE); +} |