/* * 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 static bool_t xdrmem_getlong (XDR *, long *); static bool_t xdrmem_putlong (XDR *, const long *); static bool_t xdrmem_getbytes (XDR *, caddr_t, u_int); static bool_t xdrmem_putbytes (XDR *, const char *, u_int); static u_int xdrmem_getpos (const XDR *); static bool_t xdrmem_setpos (XDR *, u_int); static int32_t *xdrmem_inline (XDR *, u_int); static void xdrmem_destroy (XDR *); static bool_t xdrmem_getint32 (XDR *, int32_t *); static bool_t xdrmem_putint32 (XDR *, const int32_t *); static const struct xdr_ops xdrmem_ops = { xdrmem_getlong, xdrmem_putlong, xdrmem_getbytes, xdrmem_putbytes, xdrmem_getpos, xdrmem_setpos, xdrmem_inline, xdrmem_destroy, xdrmem_getint32, xdrmem_putint32 }; /* * The procedure xdrmem_create initializes a stream descriptor for a * memory buffer. */ void xdrmem_create (XDR *xdrs, const caddr_t addr, u_int size, enum xdr_op op) { xdrs->x_op = op; /* We have to add the const since the `struct xdr_ops' in `struct XDR' is not `const'. */ xdrs->x_ops = (struct xdr_ops *) &xdrmem_ops; xdrs->x_private = xdrs->x_base = addr; xdrs->x_handy = size; } INTDEF(xdrmem_create) /* * Nothing needs to be done for the memory case. The argument is clearly * const. */ static void xdrmem_destroy (XDR *xdrs) { } /* * Gets the next word from the memory referenced by xdrs and places it * in the long pointed to by lp. It then increments the private word to * point at the next element. Neither object pointed to is const */ static bool_t xdrmem_getlong (XDR *xdrs, long *lp) { if (xdrs->x_handy < 4) return FALSE; xdrs->x_handy -= 4; *lp = (int32_t) ntohl ((*((int32_t *) (xdrs->x_private)))); xdrs->x_private += 4; return TRUE; } /* * Puts the long pointed to by lp in the memory referenced by xdrs. It * then increments the private word to point at the next element. The * long pointed at is const */ static bool_t xdrmem_putlong (XDR *xdrs, const long *lp) { if (xdrs->x_handy < 4) return FALSE; xdrs->x_handy -= 4; *(int32_t *) xdrs->x_private = htonl (*lp); xdrs->x_private += 4; return TRUE; } /* * Gets an unaligned number of bytes from the xdrs structure and writes them * to the address passed in addr. Be very careful when calling this routine * as it could leave the xdrs pointing to an unaligned structure which is not * a good idea. None of the things pointed to are const. */ 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; } /* * The complementary function to the above. The same warnings apply about * unaligned data. The source address is const. */ static bool_t xdrmem_putbytes (XDR *xdrs, const char *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; } /* * Not sure what this one does. But it clearly doesn't modify the contents * of xdrs. **FIXME** does this not assume u_int == u_long? */ static u_int xdrmem_getpos (const XDR *xdrs) { return (u_long) xdrs->x_private - (u_long) xdrs->x_base; } /* * xdrs modified */ static bool_t xdrmem_setpos (xdrs, pos) XDR *xdrs; u_int pos; { caddr_t newaddr = xdrs->x_base + pos; caddr_t lastaddr = xdrs->x_private + xdrs->x_handy; size_t handy = lastaddr - newaddr; if (newaddr > lastaddr || newaddr < xdrs->x_base || handy != (u_int) handy) return FALSE; xdrs->x_private = newaddr; xdrs->x_handy = (u_int) handy; return TRUE; } /* * xdrs modified */ static int32_t * xdrmem_inline (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; } /* * Gets the next word from the memory referenced by xdrs and places it * in the int pointed to by ip. It then increments the private word to * point at the next element. Neither object pointed to is const */ static bool_t xdrmem_getint32 (XDR *xdrs, int32_t *ip) { if (xdrs->x_handy < 4) return FALSE; xdrs->x_handy -= 4; *ip = ntohl ((*((int32_t *) (xdrs->x_private)))); xdrs->x_private += 4; return TRUE; } /* * Puts the long pointed to by lp in the memory referenced by xdrs. It * then increments the private word to point at the next element. The * long pointed at is const */ static bool_t xdrmem_putint32 (XDR *xdrs, const int32_t *ip) { if (xdrs->x_handy < 4) return FALSE; xdrs->x_handy -= 4; *(int32_t *) xdrs->x_private = htonl (*ip); xdrs->x_private += 4; return TRUE; }