| /* |
| * xdr_mem.c, XDR implementation using memory buffers. |
| * |
| * Copyright (c) 2010, Oracle America, Inc. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * * Neither the name of the "Oracle America, Inc." 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * 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 <string.h> |
| #include <limits.h> |
| #include <rpc/rpc.h> |
| |
| 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; |
| } |
| #ifdef EXPORT_RPC_SYMBOLS |
| libc_hidden_def (xdrmem_create) |
| #else |
| libc_hidden_nolink_sunrpc (xdrmem_create, GLIBC_2_0) |
| #endif |
| |
| /* |
| * 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 (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; |
| } |