/* $OpenBSD: xdr_mem.c,v 1.13 2006/03/31 18:28:55 deraadt 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 */ /* * 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 #include #include #include static bool_t xdrmem_getlong_aligned(XDR *, long *); static bool_t xdrmem_putlong_aligned(XDR *, long *); static bool_t xdrmem_getlong_unaligned(XDR *, long *); static bool_t xdrmem_putlong_unaligned(XDR *, long *); static bool_t xdrmem_getbytes(XDR *, caddr_t, u_int); static bool_t xdrmem_putbytes(XDR *, caddr_t, u_int); static u_int xdrmem_getpos(XDR *); /* XXX w/64-bit pointers, u_int not enough! */ 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 void xdrmem_destroy(XDR *); static 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 }; static 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 }; /* * The procedure xdrmem_create initializes a stream descriptor for a * memory buffer. */ void xdrmem_create(XDR *xdrs, caddr_t addr, u_int size, enum xdr_op op) { xdrs->x_op = op; xdrs->x_ops = ((size_t)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 int *lp) { if (xdrs->x_handy < sizeof(int32_t)) return (FALSE); xdrs->x_handy -= sizeof(int32_t); *lp = ntohl(*(int32_t *)xdrs->x_private); xdrs->x_private += sizeof(int32_t); return (TRUE); } static bool_t xdrmem_putlong_aligned(XDR *xdrs, long int *lp) { if (xdrs->x_handy < sizeof(int32_t)) return (FALSE); xdrs->x_handy -= sizeof(int32_t); *(int32_t *)xdrs->x_private = htonl((u_int32_t)*lp); xdrs->x_private += sizeof(int32_t); return (TRUE); } static bool_t xdrmem_getlong_unaligned(XDR *xdrs, long int *lp) { int32_t l; if (xdrs->x_handy < sizeof(int32_t)) return (FALSE); xdrs->x_handy -= sizeof(int32_t); memcpy(&l, xdrs->x_private, sizeof(int32_t)); *lp = ntohl(l); xdrs->x_private += sizeof(int32_t); return (TRUE); } static bool_t xdrmem_putlong_unaligned(XDR *xdrs, long int *lp) { int32_t l; if (xdrs->x_handy < sizeof(int32_t)) return (FALSE); xdrs->x_handy -= sizeof(int32_t); l = htonl((u_int32_t)*lp); memcpy(xdrs->x_private, &l, sizeof(int32_t)); xdrs->x_private += sizeof(int32_t); return (TRUE); } static bool_t xdrmem_getbytes(XDR *xdrs, caddr_t addr, u_int len) { if (xdrs->x_handy < len) return (FALSE); xdrs->x_handy -= len; memcpy(addr, xdrs->x_private, len); xdrs->x_private += len; return (TRUE); } static bool_t xdrmem_putbytes(XDR *xdrs, caddr_t addr, u_int len) { if (xdrs->x_handy < len) return (FALSE); xdrs->x_handy -= len; memcpy(xdrs->x_private, addr, len); xdrs->x_private += len; return (TRUE); } static u_int xdrmem_getpos(XDR *xdrs) { /* XXX w/64-bit pointers, u_int not enough! */ return ((u_long)xdrs->x_private - (u_long)xdrs->x_base); } static bool_t xdrmem_setpos(XDR *xdrs, u_int pos) { caddr_t newaddr = xdrs->x_base + pos; caddr_t lastaddr = xdrs->x_private + xdrs->x_handy; if (newaddr > lastaddr) return (FALSE); xdrs->x_private = newaddr; xdrs->x_handy = (u_int)(lastaddr - newaddr); /* XXX w/64-bit pointers, u_int not enough! */ return (TRUE); } static int32_t * xdrmem_inline_aligned(XDR *xdrs, u_int len) { int32_t *buf = 0; if (xdrs->x_handy >= len) { xdrs->x_handy -= len; buf = (int32_t *)xdrs->x_private; xdrs->x_private += len; } return (buf); } /* ARGSUSED */ static int32_t * xdrmem_inline_unaligned(XDR *xdrs, u_int len) { return (0); }